CN204083543U - For the spigot and socket type electric melting pipe fittings of heavy caliber pipe - Google Patents
For the spigot and socket type electric melting pipe fittings of heavy caliber pipe Download PDFInfo
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- CN204083543U CN204083543U CN201420400359.3U CN201420400359U CN204083543U CN 204083543 U CN204083543 U CN 204083543U CN 201420400359 U CN201420400359 U CN 201420400359U CN 204083543 U CN204083543 U CN 204083543U
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- pipe fitting
- pipe
- fitting body
- heavy caliber
- electric melting
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Abstract
A kind of spigot and socket type electric melting pipe fittings for heavy caliber pipe, it comprises the tubular pipe fitting body of polyethylene material, in the barrel of described pipe fitting body, be compounded with Steel Skeleton enhancement layer and be inlaid with copper electric heating wire or heating net on the inwall of described pipe fitting body, the electrode of described copper electric heating wire or heating net causes the outside of pipe fitting body; In the middle part of the inwall of described pipe fitting body, being provided with at least one for carrying out the gear ring of spacing cooperation with pipeline to be connected, being provided with certain tapering at the described pipe fitting body joint socket place with tube fit to be connected.This heavy caliber electric melting pipe fittings solves heavy caliber pipe and connects difficult problem, can produce bigbore tube connection piece, and by the restriction of injection moulding grams unlike traditional injection machine.Centre is compounded with steelframe enhancement layer, makes the overall voltage endurance capability of pipeline obtain effective guarantee.
Description
Technical field
The utility model patent relates to a kind of heavy caliber (Dn >=630mm) polyethylene kind tubing connection enhancement mode electric melting pipe fittings, especially a kind of connecting pipe part of polyethylene steel-plastic composite flat wall type tubing.
Background technique
The electric melting connection pipe fitting of tubing is generally divided into two large classes in the market, and a class is spigot and socket type electric melting pipe fittings, and a class is Electric thermal smelting belt.The current largest domestic of polyethylene full plastic pipeline is produced bore and is reached Dn=1600mm, and the Placement that this kind of heavy caliber pipe mainly adopts is heat-melting butt-joint, being less than Dn=630mm tubing for bore can adopt electric melting pipe fittings to connect, especially be most widely used in gas pipeline, its main feature is that join strength is high, safety coefficient is high, easy to use, but this pipe fitting generally adopts Shooting Technique, there are one-process and two-step method, pipe fitting injection machine mould is large, apparatus expensive, cost of production is high, cause pipe fitting price very high, be mainly used at present using in supply pipe repairing work and gas works and steel wire mesh framework composite tube, electric melting pipe fittings for larger caliber is produced because many reasons there is no mass production both at home and abroad, the polyvinyl piping materials (Dn >=630mm) of larger caliber nearly all adopts the mode of heat-melting butt-joint.
And the Placement of electric melting pipe fittings is spigot and socket type, mainly carry out electric melting connection at outer pipe wall, tubing both can be pure polyvinyl piping materials, the outer wall that also middle can be compounded with other material is the composite pipe of polythene material, the Typical Representative of this kind of composite pipe is steel wire mesh framework composite tube, owing to being compounded with steel screen layer in tubing, pipeline can not be carried out with docking mode to connect, mainly do socket joint with electric melting pipe fittings to connect, steel wire mesh framework composite tube existing market is with bore mainly at below Dn=630mm, and pipe fitting maximum caliber produces Dn=630mm; Common plastics Electric thermal smelting belt product is that the conductive metal mesh that on a plate face by thermoplastic strip and strip, pressing is inlayed is formed, and it is widely used in the connection of major diameter thermoplastic drainage pipe with no pressure.Common plastics Electric thermal smelting belt is made up of pure plastics, and its tensile strength is lower, can only meet the drainage pipe only bearing external pressure (unstressed load) and use.During use, be coated on and be connected in the outer wall surface of pipe end, or be close to and be connected in the inner wall surface of pipe end, being welded together with tubing after electrified regulation forms the connection of pipeline.Be illustrated in figure 1 the molten band of existing common pure plastic electric heating in use, the bridging arrangement that two ends adopt, a wedge-shaped crevice 13 is there is between lap-joint's Electric thermal smelting belt 11 and tube wall 12, normally in gap, insert a wedge-shaped plastic block or plastic rod, during energising melting welding, unit of plastic and Electric thermal smelting belt in the lump melting welding are filled wedge-shaped crevice.But because the conductive metal mesh on Electric thermal smelting belt herein can not Direct Contact Heating tube wall, cause welding quality herein the poorest often, (13 place) is leaked in easy generation, technology report is had now to carry out steel wire enhancing to this Electric thermal smelting belt, certain pressure piping can be born connect, but still there is gap at the closed place of connection in this link, adopt filler method secondary fill and outside again repair welding one deck carry out proof strength, implement very difficult guarantee to bear interior pressure and ensure that Long-Time Service can not leak, Electric thermal smelting belt can only be connected the tubing of same plastic material with identical caliber simultaneously, the tubing of unlike material is not connected, can not connect the tubing of different bore, therefore connecting means uses and is greatly limited.Also having a kind of is exactly the structure shown in Fig. 2, carries out the structure that secondary is compounded to form.Although the pure pipeline production bore of moulding of polyethylene reaches Dn=1600mm, but because hot melt facility are doted on greatly, construct very inconvenient, and heat-melting butt-joint mode can only be adopted, tubing maintenance is also very inconvenient, simultaneously bigbore polyethylene pure mould tubing due to the reason price of wall thickness very high, heavy caliber polyethylene material is not widelyd popularize a lot of local use.Domestic have a lot of technician to have developed bigbore steel-plastic composite pipe (DN=2600mm), and these tubing strengthen because centre is compounded with steel structure, and the welding manner achieved a butt joint of having no idea, tubing interconnection technique could not be well solved.
Model utility content
The technical problem that the utility model patent will solve is to provide a kind of heavy caliber pipe link, especially heavy caliber has the enhancement mode connection pipe fitting of the tubing (DN=2600mm) bearing internal pressure, and it can be overall plastic tubing also can be steel plastic compount planomural type tubing.
For achieving the above object, the utility model patent there is provided a kind of containing the tube connection piece that sheet metal strengthens or porose sheet metal strengthens again or wire netting strengthens.
For a spigot and socket type electric melting pipe fittings for heavy caliber pipe, comprise
The tubular pipe fitting body of polyethylene material, Steel Skeleton enhancement layer (sheet metal, porose sheet metal or metal net layer) is compounded with in the sidewall of described pipe fitting body, Steel Skeleton does not contact with air, thus be not easily corroded, not only increase the intensity of PE electric melting pipe fittings like this, and ensure that the working life of electric melting pipe fittings, on the inwall of pipe fitting body, be inlaid with copper electric heating wire or heating net simultaneously, and the electrode of described copper electric heating wire or heating net causes the outside of pipe fitting body
At least one is provided with for carrying out the gear ring of spacing cooperation with pipeline to be connected in the middle part of the inwall of described pipe fitting body, when avoiding large-diameter pipe unit construction, tubing one insertion is long, another root inserts too short situation, improve the Security of connection, be provided with certain tapering at the described pipe fitting body joint socket place with tube fit to be connected, the length at this tapering place is generally 5 centimetres-10 centimetres and can meets the demands.Due to the impact of tubing out of roundness and size deviation, tubing is made to be difficult to normally be inserted in the middle of pipe fitting, before formation of tubes (or mould will arrange taper, two of pipe fitting ports are made to have certain gradient or tapering, tubing is facilitated to insert), this tapering thus the problem of the connection difficulty that heavy caliber pipe out of roundness and outside dimension deviation cause can be solved.
Described pipe fitting body is high density polyethylene (HDPE) or medium density polyethylene material.
Described spigot and socket type electric melting pipe fittings be isometrical directly, the one of reducing directly, in equal tee, elbow or flange root.
Compared with prior art, the beneficial effect of the utility model patent is:
1, this heavy caliber electric melting pipe fittings solves the problem of heavy caliber pipe (DN=2600mm) the especially connection difficulty of composite pipe, bigbore tube connection piece can be produced, and by the injection moulding grams (weight of pipe fitting unlike traditional injection machine, general injection machine says shot capacity how many grams, or how many tonnages) restriction.
2, because centre is compounded with steelframe enhancement layer, and be an integrated pipe fitting, make the overall voltage endurance capability of pipeline obtain effective guarantee.
3, adopt mould pressing process and rotational molding technique, achieve the production of large-caliber pipe fittings, and ensure that quality and the intensity of pipe fitting.
4, before formation of tubes (or mould will arrange taper, two of pipe fitting ports are made to have certain gradient or tapering, tubing is facilitated to insert), this tapering thus the problem of the connection difficulty that heavy caliber pipe out of roundness and outside dimension deviation cause can be solved.
5, be Steel Skeleton enhancement layer in the middle of this Steel Skeleton electric melting pipe fittings, owing to being all surrounded by PE plastic layer inside and outside Steel Skeleton, Steel Skeleton does not contact with air, thus is not easily corroded, not only increase the intensity of PE electric melting pipe fittings like this, and ensure that the working life of electric melting pipe fittings.
6, the middle part of pipe fitting inner wall is provided with a gear ring, and when avoiding large-diameter pipe unit construction, tubing one insertion is long, and another root inserts too short situation, improves the Security of connection.
7, no matter the equipment producing pipe fitting is die pressing or rotational moulding method, and equipment investment is low, and processing is simply efficient.
8, owing to being compounded with steel enhancement layer, the general thickness of pipe fitting is little, and cost is low, makes the comprehensive cost of pipeline low.
9, overall pipe fitting is one-body molded, and the circularity of internal diameter is better, and coordinate the melting of electric heating wire to connect, the sealability of joint is better.
Accompanying drawing explanation
Fig. 1 is existing a kind of Electric thermal smelting belt connection diagram connected for heavy caliber pipe.
Fig. 2 is existing a kind of Electric thermal smelting belt connection diagram connected for heavy caliber pipe.
Fig. 3 is the stereogram of the isometrical direct pipe fitting in the utility model.
Fig. 4 is the whole-cutaway view of Fig. 3.
Fig. 5 is the stereogram of equal tee pipe fitting.
Fig. 6 is the whole-cutaway view of elbow.
Fig. 7 is the whole-cutaway view of the direct pipe pipe fitting of reducing.
Fig. 8 is the whole-cutaway view of flange root.
Fig. 9 is the pattern one (perforated metal plate) of steelframe enhancement layer.
Figure 10 is the pattern two (mesh can be rhombus net, rectangle or regular polygon) of steelframe enhancement layer.
Figure 11 is the schematic diagram of compression moulding injection moulding blank.
Figure 12 is blank.
Figure 13 is through preliminary mach blank.
Figure 14 is finished product.
Figure 15 is the layout chart of the inside and outside layer of plastics and Steel Skeleton enhancement layer three solder joints in rotational moulding method preparation process.
Embodiment
As shown in Figures 3 to 10,
These electrothermal smelting tube both sides are polyethylene material, mesosphere is compounded with sheet metal, porose sheet metal (as Fig. 9), spiral metal tube or wire netting (can be mesh can be rhombus, rectangle or regular polygon, as Figure 10), form Steel Skeleton enhancement layer 2, improve the ring stiffness in its tensile strength axially and circumference.On the inwall of pipe fitting, be compounded with copper electric heating wire or heating net 3 simultaneously.Polyethylene raw material wherein used is identical with supporting tubing material, is high density polyethylene (HDPE) or medium density polyethylene.
Be Steel Skeleton enhancement layer 2 in the middle of this Steel Skeleton electric melting pipe fittings, owing to being all surrounded by PE plastic layer inside and outside Steel Skeleton, Steel Skeleton does not contact with air, thus is not easily corroded, not only increase the intensity of PE electric melting pipe fittings like this, and ensure that the working life of electric melting pipe fittings.
Heavy caliber PE pipeline or steel plastic compount planomural type pipeline, due to the impact of tubing out of roundness and size deviation, tubing is made to be difficult to normally be inserted in the middle of pipe fitting, before formation of tubes (or mould will arrange taper, two of pipe fitting ports are made to have certain gradient or tapering, tubing is facilitated to insert, wherein, tapering length generally from the long needs that just can meet join strength of edge 5cm-10cm, this tapering thus the problem of the connection difficulty that heavy caliber pipe out of roundness and outside dimension deviation cause can be solved.
At least one is provided with for carrying out the gear ring 4 of spacing cooperation with pipeline to be connected, for limiting the degree of depth that pipeline inserts in the middle part of the inwall of described pipe fitting body.
Last formality of connecting up together: the assembly parts after processing is above carried out being not less than 48 hours status adjustment to eliminate internal stress in its natural state, stable dimensions, by the processing assembly parts after previous step is stablized, within it surface cuts one openning open in the mode of helix or wave, resistance wire is imbedded in openning simultaneously, then, internal surface is flattened; Product passed examination, then by the product of passed examination in two ends installing electrodes 5, carry out melting connection by resistive heater during connection.
Owing to have employed Steel Skeleton enhancement layer 2, the materials of PE material are saved greatly, and the weight of pipe fitting also obviously reduces, and cost performance improves.It also can be vertical steel band that Steel Skeleton strengthens, or steel wire winding layer.Or even heterotype profiled sheet.
If the words having more high strength to require to pipe fitting, the that method of two composite pipe can be used, use stud and steel wire to strengthen simultaneously, directly on the inwall of tubing, be wound around electric heating wire, prerequisite is that the size of tubing is done according to the size of pipe fitting, and will carry out design thickness according to the pressure-bearing of design.
Pipe fitting mainly contains five large classes: isometrical direct pipe fitting, the direct pipe fitting of reducing, equal tee pipe fitting, bend pipe tools and flange root, as Fig. 3 to Fig. 8, (Main Function of flange is that transition connects, such as this head is plastic tube, that head is steel pipe, so use flange root or be flange head, just can be connected to flange plate and a pad screw again), here five kinds can be carried out the bigbore pipe fitting of production any one by die pressing, also having one is rotational moulding method, the narrow limitation that tool is certain, rotational moulding method can be produced directly isometrical, reducing directly and flange, now two kinds of methods are introduced respectively.
As Figure 11 to Figure 14, die pressing technique: with an extruder 6 first by polyvinyl plastics melting, the hollow cylinder mould 7 of a vertical type is had at the extrusion outlet place of extruder, the hydraulic pressure die head that platform is identical with this mould internal diameter is had above mould, the oil hydraulic cylinder 71 of fixing certain tonnage is installed above hydraulic pressure die head, this mould then has insulation and heating equipment outward, is outwards provided the continuous fusion plastics with certain pressure by this hydraulic pressure die head and mould.Another one composite molding die 8 is had in the side of mould, composite molding die is the occasion forming pipe fitting blank, after matched moulds, its inside has injection moulding cavity 81 and is arranged on the cooling water cavity 82 of injection moulding cavity periphery, there is plurality of specifications, install in the injection moulding cavity simultaneously in composite dies and strengthen the Steel Skeleton such as steel plate or steel mesh.In this composite dies, hydrologic cycle cooling system is installed simultaneously.After all moulds reach setting temperature, in the hollow cylinder mould 7 of vertical type, the plastics of fusing are first extruded with extruder, the molten plastic extruding certain pressure continuously can be formed by the pressurization of this mould and hydraulic pressure die head, can only extrude by intermittent type unlike injection moulding, extruded quantitative limitation, polyvinyl plastics after extruding by punching head under the effect of moulding press by the plastic extrusion in the hollow cylinder mould 7 of vertical type in composite molding die 8, plastic warp in composite molding die 8 cooling and shaping after a while, there is certain rigidity, with large-scale thimble, the pipe fitting blank of cooling is taken out, be put into again in water and carry out cooling and shaping.Because this plumbing dimensions is very large, will be for a long time if will cool on mould always, efficiency can be very low, so to take off be put into other place carry out water-bath cooling to enhance productivity, cooled pipe fitting is blank part, be put into again in a warehouse and carry out the 24 little natural normal temperature up to 48 hours and deposit, until carry out the retrofit of internal diameter size after real sizing again, after size qualification again with lathe to inwall Jia Shibu electric heating wire, again inwall is flattened after the good electric heating wire of cloth, form qualified enhancement mode electric melting pipe fittings.
Rotational moulding method technique, rotational moulding method is in fact similar with polyethylene winding reinforcing pipe production method, and overmolding is not a contractile steel pipe, in the deployed state, forming a cylindrical body, is a punching block, also satisfactory mould, in a contracted state, can carry out the demoulding easily.This steel pipe can rotate simultaneously, outer diameter of steel pipes is the internal diameter of electric melting pipe fittings, first first produce with an extruder molten plastic extruding writing board shape, under the rotation of this steel pipe, the polyethylene strip of melting is wrapped in outside steel pipe after steel pipe 360 degree, form inner plastic 21, then Steel Skeleton enhanced layer packets is overlayed on outside polyethylene, in this course, all Steel Skeletons are than under the size of polyethylene board, Steel Skeleton two ends can not be outside exposed, Steel Skeleton can be welded into an entirety by welding machine and not allow it fall down and keep there is certain pressure to inner side polyethylene, form Steel Skeleton enhancement layer 2, and then with an extruder, or outer layer polyethylene extruded by same extruder, form plastic outer layer 22, finally cool with water, sizing relief steel pipe shrinks size and diminishes, shaping composite pipe fitting is taken out, then be also carry out status adjustment under being put into room temperature, make pipe fitting not have internal stress effect to carry out last wiring formality again to machine and (electric heating wire first can certainly be wrapped in the outer surface of steel pipe, directly get on regard to compound when squeezing inner plastic, save last one cabling processes), in this course, the position of the lap-joint's weld seam 9 in adjustment three layers that can be suitable, make it evenly to stagger, reach intensity to maximize.The section appearance as shown in figure 15 of the pipe fitting formed.
Die pressing can produce isometrical directly, reducing directly, equal tee, elbow, flange root these five kinds.And rotational moulding method mainly produce isometrical directly, reducing directly these two kinds, this steel pipe is exactly an individual mould in fact, but can become and diminish greatly and shaping pipe fitting finally can be taken off.
Pipe fitting has a variety of pattern in fact, but all can combining with these five kinds of pipe fittings.
Embodiment recited above is described preferred implementation of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; relevant technical staff in the field, to various distortion of the present utility model and improvement, all should expand in protection domain as determined in the utility model claims.
Claims (4)
1., for a spigot and socket type electric melting pipe fittings for heavy caliber pipe, it is characterized in that, comprise
The tubular pipe fitting body of polyethylene material, in the barrel of described pipe fitting body, be compounded with Steel Skeleton enhancement layer and be inlaid with copper electric heating wire or heating net on the inwall of described pipe fitting body, the electrode of described copper electric heating wire or heating net causes the outside of pipe fitting body;
In the middle part of the inwall of described pipe fitting body, being provided with at least one for carrying out the gear ring of spacing cooperation with pipeline to be connected, being provided with certain tapering at the described pipe fitting body joint socket place with tube fit to be connected.
2. the spigot and socket type electric melting pipe fittings for heavy caliber pipe according to claim 1, is characterized in that, described pipe fitting body is high density polyethylene (HDPE) or medium density polyethylene material.
3. the spigot and socket type electric melting pipe fittings for heavy caliber pipe according to claim 1, is characterized in that, described Steel Skeleton enhancement layer is the one in sheet metal, porose sheet metal, spiral metal tube, helical spring, metal bellows or wire netting.
4. the spigot and socket type electric melting pipe fittings for heavy caliber pipe according to claim 1, is characterized in that, described pipe fitting body is the one in isometrical direct pipe fitting, the direct pipe fitting of reducing, equal tee pipe fitting, elbow or flange root.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420400359.3U CN204083543U (en) | 2014-07-18 | 2014-07-18 | For the spigot and socket type electric melting pipe fittings of heavy caliber pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420400359.3U CN204083543U (en) | 2014-07-18 | 2014-07-18 | For the spigot and socket type electric melting pipe fittings of heavy caliber pipe |
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| Publication Number | Publication Date |
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| CN204083543U true CN204083543U (en) | 2015-01-07 |
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|---|---|---|---|
| CN201420400359.3U Expired - Fee Related CN204083543U (en) | 2014-07-18 | 2014-07-18 | For the spigot and socket type electric melting pipe fittings of heavy caliber pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104390071A (en) * | 2014-07-18 | 2015-03-04 | 张永杰 | Socket type electrically-fused pipe fitting for large-caliber pipe and production method thereof |
-
2014
- 2014-07-18 CN CN201420400359.3U patent/CN204083543U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104390071A (en) * | 2014-07-18 | 2015-03-04 | 张永杰 | Socket type electrically-fused pipe fitting for large-caliber pipe and production method thereof |
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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: 20150107 Termination date: 20160718 |