CN102141178B - Fastening type pipe fitting - Google Patents
Fastening type pipe fitting Download PDFInfo
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- CN102141178B CN102141178B CN2010102400424A CN201010240042A CN102141178B CN 102141178 B CN102141178 B CN 102141178B CN 2010102400424 A CN2010102400424 A CN 2010102400424A CN 201010240042 A CN201010240042 A CN 201010240042A CN 102141178 B CN102141178 B CN 102141178B
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Abstract
The invention discloses a fastening type pipe fitting, aiming to solve the defect of poor applicability of a fastening pipe in the prior art. The fastening type pipe fitting disclosed by the invention comprises a plastic connecting piece, a rubber fastening piece and a fastening nut, wherein the plastic connecting piece comprises at least one connecting end, and each connecting end is provided with bulged blocks and hot-melt outer surfaces from the center to the outer end sequentially; bulged blocks are provided with fastening external screw threads; the hot-melt outer surfaces are connected in a hot-melt mode with a plastic inner wall at the pipe opening of a composite pipe on which the rubber fasting piece and the fastening nut are sleeved; and the fastening nut is integrated with the rubber fastening piece and the plastic connecting piece through threaded connection of the inner screw thread of the nut and a fastening outer screw thread. The fastening type pipe fitting provided by the invention can be suitable for using occasions of multiple composite pipes, is connected firmly, has high compressive resistance and good seal property, and is convenient to use.
Description
Technical field
The present invention relates to a kind of pipeline connecting pipe fitting, be used for the connection of the pipeline of systems such as plumbing, air feed, chemical industry, heating power.
Background technique
In the existing technology, pure plastic pipe can't obtain the higher pressure that bears, and pure metal pipe antiseptic property is not good, and composite pipe has solved the relatively poor problem of pure plastic pipe intensity on the one hand, has solved the not good problem of metallic material pipe antiseptic property on the one hand.
The kind of metal-plastic composite pipe is very various, mainly is divided into four big types according to structure:
1, inner plastic+outer layer metal two layer composite structure; Typical case's representative of this pipeline is: (metal layer can be welded tube, galvanized pipe, weldless tube, plastic layer to the steel lining plastic composite; Select according to practical use; CECS125-2001 building water supply steel-plastic composite pipe pipework technical regulations), hot-drawn dials moulding aluminum alloy plastics lined pipe (industry standard as yet promulgation), internal plastic coating composite pipe (Reference standard: CJ/T120-2001 " feedwater plastic coated composite steel pipe " city-building industry standard) mainly contain polyethylene (PE), heat-proof polythene (PE-RT), ABS, PPR, PA etc., the reference technique rules:.
2, the bonding layer+outer layer metal three-layer composite structure of inner plastic+PUR, the typical case of this type pipeline is represented as: stainless steel lining plastic pipe (Reference standard number: CJ/T184-2003 stainless steel lining plastic pipe construction industry standard).
3, inner plastic+metallic intermediate layer+outer layer plastic three-layer composite structure; Typical case's representative of this pipeline is: hole pattern steel band polythene composite pipe (with reference to CJ/T183-2003); Steel Skeleton polythene plastic composite pipe (with reference to CJ/T123-2004), these two types of tubing of reticular structure decision of these two kinds of its metal layers of tubing need not to use the bonding layer of PUR; Also has a kind of inside and outside plastic-coated steel-plastic composite pipe in addition; But in its actual production technology; In the plastic raw material of powdery prepares; Reality has been infiltrated the melt viscosity jelly, because clear and definite " layer structure ", so can divide this three-layer composite structure (" feedwater plastic coated composite steel pipe " (CJ/T120-2001) city-building industry standard) into.
4, five layers of composite structure composite pipe of the bonding layer+outer layer plastic of the bonding layer+metallic intermediate layer of inner plastic+PUR+PUR; This type tubing mainly contains: steel wire mesh frame plastic composite tube (with reference to CJ/T189-2007), PSP steel-plastic composite pressure pipe (with reference to CJ/T183-2008), RPAP5 butt welding aluminium-plastic composite pipe (with reference to CJ/T 159--2006), butt joint or lap welding plastic-aluminum composite pressure pipe (with reference to the GBT18997-2003 plastic-aluminum composite pressure pipe), braided steel wire net polythene composite pipe.
More than four types, the definition aspect metal layer is all very clear and definite, plastic layer then adopts according to actual needs: polyethylene (PE), heat-proof polythene (PE-RT), ABS, PPR, PA etc.
The appearance of composite pipe has solved the relatively poor problem (it is the higher pressure that bears that pure plastic pipe can't obtain) of pure plastic pipe intensity on the one hand, has solved the not good problem of metallic material pipe antiseptic property on the other hand.
For the Placement of above-mentioned metal-plastic type composite pipe, the main following manufacture characteristic of considered:
1, tubing: for the 1st type (inner plastic+outer layer metal two layer composite structure), the 2nd type of (the bonding layer+outer layer metal three-layer composite structure of inner plastic+PUR) metal-plastic type composite pipe; Because metal layer is in the outside of plastic layer; Therefore metal must have good anti-corrosion; Otherwise the life-span can't guarantee, such as adopting aluminum alloy or stainless steel; And the 3rd type (inner plastic+metallic intermediate layer+outer layer plastic three-layer composite structure composite pipe), the 4th type (five layers of composite structure composite pipe of the bonding layer+outer layer plastic of the bonding layer+metallic intermediate layer of inner plastic+PUR+PUR); Because metal is wrapped in the middle of the internal and external layer plastics; Then metal can adopt multiple material: such as steel wire, and stainless steel, steel band; Aluminium strips etc., these two types of composite pipes have good anti-corrosion.
2, tube connection piece: no matter above four metalloids-plastic composite pipe have or not between plastic layer and the metal layer on the one hand to be connected the factor (like the binder PUR), owing to the creep properties problem of the inconsistent and plastics of percent thermal shrinkage; Delamination possibly appear between plastic layer and the metal layer; And in a single day delamination appears, then fed sheet of a media (like water) contacts with metal fully, causes the pollution of metal erosion and medium; The more important thing is; Under the certain pressure condition, possibly be extruded distortion with plastics after metal layer separates, even blocking pipe; Any Placement no matter except that metal layer is stainless composite pipe, must consider that all metal layer can not contact with fed sheet of a media on the other hand; Otherwise can cause the corrosion of metal layer; Pollution medium on the one hand because of the metal layer corrosion, influences the actual pressure-bearing and the working life of pipeline on the one hand.
Existing the Placement that aforementioned tubes adopted is mainly contained:
1, application number is 00224343.1, notice of authorization day is that Chinese invention patent and application number that December 13 in 2000, day, were called " Thin Stainless Steel pipe connector " are 02276827.0, notice of authorization day is that the Chinese invention patent that July 30 in 2003, day, were called " metal foil pipe connector " discloses screw thread FERRULETYPE link respectively; The characteristics of this kind pipe fitting are: be fit to two types composite metal-plastic pipe; But material uses copper or stainless steel; Cost an arm and a leg poor reliability;
Application number is 200720184505.3, notice of authorization day is that the Chinese invention patent that Augusts 6 in 2008, day, were called " pipeline enlarging linkage structure " has adopted the higher plastics of hardness; But it relies on rubber seal fully; Inapplicable large diameter pipeline; The rubber easy ageing influences the pipe-line system life-span simultaneously;
2, application number is 00218383.8, notice of authorization day is that Chinese invention patent and application number that June 27 calendar year 2001, day, were called " clamp-press type pipe " are 200320129209.5, notice of authorization day is that the Chinese invention patent that December 15 in 2004, day, were called " hot melt clamp-press type composite pipe fitting " discloses hot melt (or socket joint) clamp-press type pipe respectively; Mainly be applicable to the stainless steel lining plastic pipe, adaptability is relatively poor;
3, pure plastic hot melt pipe fitting, this kind pipe fitting will be peelled off the outer layer metal of posetionof weld before installing, owing to do not have metal to strengthen at link position, then pressure-bearing significantly reduces, soundness is poor;
4, application number is 200520101882.7, notice of authorization day is that the Chinese invention patent that July 19 in 2006, day, were called " two-sided thermofusible spigot joint " discloses a kind of suitable outer layer plastic+metallic intermediate layer+inner plastic and the middle link that adds the tubing of two-layer bonded material again; Like aluminium-plastic composite pipe, RPAP5, PSP steel-plastic composite pressure pipe, hole pattern steel band reinforced plastics composite tube; The connection of this kind link is reliable, cost is lower, but has following problem:
(1) this kind link only is fit to the composite pipe that internal and external layer is plastics, is not suitable for the outer composite pipe of metal that is;
(2) because there is difference in the wall thickness of various tubing, this kind link only is fit to specific tubing, does not have versatility;
(3) the plastic layer wall thickness to tubing has specific (special) requirements, and thin excessively plastic layer makes the plastics of fusion separate with metal layer in the time of can causing socket joint, causes the accident of leaking;
(4) instrument is not general, and tool kind is more, can't be supporting;
5, plastic electrofusion pipe fitting; The steel wire mesh frame plastic composite tube, hole pattern steel band reinforced plastics composite tube, the steel skeleton plastic clad pipe that are mainly PE class larger caliber use; The technology content of electric melting pipe fittings is higher, connects reliably, and defective is strictness is carried out in requirement to the port of tubing the processing of sealing; Stop end plane metal and contact with fed sheet of a media, method commonly used is to use seal mouth ring and pipe hot melting to seal.
In the installation process of plastic electrofusion pipe fitting; For the requirement that guarantees to seal need be used large-scale heat sealing equipment; And usually do not possess such condition during site construction, and for small-bore pipe, except that steel wire mesh frame plastic composite tube and steel frame-plastic strengthen the composite pipe; Other internal layer adopts metal sheet, seal processing more difficulty, cost of production is higher, installation specification is high.
In addition; In the prior art, for the plastic-metal composite pipe that adopts thermoplastic extrusion molding plastics extrusion moulding, installing of pipe fitting; General mechanical connection and the hot melt Placement of adopting; Generally adopt hot melt die head heating or the molten heating of electric heating for the hot melt Placement, make thermoplastic fusing and molten being integral, can make the heating of metallic intermediate layer layer and the fusing internal and external layer plastics in the composite pipe and be closely linked with pipe fitting.Medium-high frequency and induction heating technique are the highest, fastest to the metallic material efficiency of heating surface at present, and low consumption environment protection.It has been widely used in that all trades and professions are joined hot working, heat treatment, the hot charging of metallic material and technology such as welding, melting in.It not only can heat whole workpiece, can also be to the local specific aim heating of workpiece; The deep layer that can realize workpiece is diathermanous, also can only concentrate heating to its surface, top layer; Not only can directly heat, also can carry out the indirection type heating nonmetallic material to metallic material.
Summary of the invention
The objective of the invention is to disclose a kind of single hot melting fastening type pipe fitting, to solve fastening pipe fitting of the prior art defective poor for applicability.
In order to realize above purpose; The invention discloses a kind of single hot melting fastening type pipe fitting; Comprise plastic fastening, rubber fastening piece and fastening nut, plastic fastening comprises at least one connecting end, and each connecting end communicates with each other through the passage in the plastic fastening; Be provided with projection and hot melt outer surface successively from the mediad outer end at each connecting end; Projection is provided with fastening outside thread, and the hot melt outer surface can be connected with the plastic liner hot melt of the composite pipe mouth of pipe that is set with rubber fastening piece and fastening nut, and the rubber fastening piece that can be sleeved on the composite pipe is arranged between plastic fastening and the fastening nut; The fastening nut internal surface be provided with can be adaptive with fastening outside thread the nut internal thread, fastening nut is through nut internal thread and fastening externally threaded be spirally connected and rubber fastening piece, plastic fastening are nipped into one.
Wherein, the mouth of pipe that is connected with hot melt outer surface hot melt is the hole enlargement mouth of pipe, and the position that hot melt connects is the hot melt internal surface of the composite pipe hole enlargement mouth of pipe.
Wherein, be provided with the nut mouth of pipe at the tail end of fastening nut, the outer surface of the nut mouth of pipe and rubber fastening piece is adaptive, and the maximum inner diameter of the nut mouth of pipe is less than the maximum outside diameter of rubber fastening piece.
Wherein, increase successively in the extroversion without leave in the fastening nut, the external diameter of rubber fastening piece increases from inside to outside successively; And/or the angle of inclination that the fastening nut internal diameter increases successively is the 1-10 degree, and the angle of inclination that the external diameter of rubber fastening piece increases successively is the 1-10 degree.
Wherein, single hot melting fastening type pipe fitting also comprises metal lining, and metal lining can be arranged in the port of connecting end of plastic fastening; And/or metal lining is processed by copper or stainless steel.
Wherein, be respectively equipped with in the outer end edges of the connecting end of plastic fastening and be used to collect the hot melt outer surface is connected the unnecessary melt that produces with the plastic liner hot melt of the mouth of pipe of composite pipe material-storing groove.
Wherein, fastening nut is processed by metal or plastics.
Single hot melting fastening type pipe fitting of the present invention; Go for the use sight of multiple composite pipe, be connected firmly, anti-stress is strong; Good airproof performance; Easy to use, special in the less composite pipe of internal diameter, its installation is especially convenient, fastening especially firmly, sealing is especially good, anti-stress is especially strong.
The invention also discloses the multi-sealed fastening type pipe fitting of a kind of medium-high frequency induction heating, to solve fastening pipe fitting of the prior art defective poor for applicability.The multi-sealed fastening type pipe fitting of medium-high frequency induction heating of the present invention; Comprise plastic fastening, fastening nut; Plastic fastening comprises at least one connecting end; Each connecting end communicates with each other through the passage in the plastic fastening; Be provided with projection and fastening surface of contact successively from the mediad outer end at each connecting end; Projection direction outward is provided with protuberance, the recessed space between protuberance and the fastening surface of contact with treat that the fastening composite pipe mouth of pipe of hot melt is adaptive, it is surperficial that the surface of contact of fastening surface of contact, protuberance and composite pipe forms the hot melt of fastening type pipe fitting and composite pipe; On projection, be provided with fastening outside thread; The internal surface of fastening nut be provided with can be adaptive with fastening outside thread the nut internal thread, fastening nut treats that through nut internal thread and fastening externally threaded be spirally connected and plastic fastening is nipped into one the fastening composite pipe of hot melt comprises three layers of ecto-entad: plastic outer layer, metal middle level and inner plastic or ecto-entad five layers: plastic outer layer, heat-fusing glue layer, metal middle level, heat-fusing glue layer, inner plastic.
Wherein, fastening nut is processed by plastics or metal.
Wherein, the multi-sealed fastening type pipe fitting of medium-high frequency induction heating also comprises the fastening rubber ring of waterproof, and the fastening rubber ring of waterproof is clipped between plastic fastening, the fastening nut.
The multi-sealed fastening type pipe fitting of medium-high frequency induction heating of the present invention; Go for the use sight of multiple composite pipe, be connected firmly, anti-stress is strong; Good airproof performance; Easy to use, special in the less composite pipe of internal diameter, it is fastening especially firmly, sealing is especially good, anti-stress is especially strong.
Description of drawings
Fig. 1 is the decomposition texture schematic representation of a kind of fastening type pipe fitting of the present invention;
Fig. 2 is the front view of a kind of fastening type pipe fitting of the present invention;
Fig. 3 is that the A-A of Fig. 2 is to sectional drawing;
Fig. 4 is the embodiment's one of a kind of fastening type pipe fitting of the present invention a front view;
Fig. 5 is that Fig. 4 embodiment's rubber fastening piece is installed in the structural representation in the fastening nut;
Fig. 6 is the embodiment's two of a kind of fastening type pipe fitting of the present invention a front view;
Fig. 7 is that Fig. 6 embodiment's rubber fastening piece is installed in the structural representation in the fastening nut;
Fig. 8 is the embodiment's three of a kind of fastening type pipe fitting of the present invention a front view;
Fig. 9 is Fig. 8 embodiment's the fastening type pipe fitting and the mounting structure schematic representation of composite pipe;
Figure 10 is that Fig. 8 embodiment's rubber fastening piece is installed in the structural representation in the fastening nut;
Figure 11 is the embodiment's four of a kind of fastening type pipe fitting of the present invention a front view;
Figure 12 is that the metal lining among Figure 11 embodiment is installed in the structural representation in the plastic fastening;
Figure 13 is the embodiment's five of a kind of fastening type pipe fitting of the present invention a front view;
Figure 14 is that Figure 13 embodiment's rubber fastening piece is installed in the structural representation in the fastening nut;
Figure 15 is the embodiment's six of a kind of fastening type pipe fitting of the present invention a front view;
Figure 16 is that the metal lining among Figure 15 embodiment is installed in the structural representation in the plastic fastening;
Figure 17 is that the master of the another kind of fastening type pipe fitting of the present invention looks exploded view;
Figure 18 is the three-dimensional exploded view of the another kind of fastening type pipe fitting of the present invention;
Figure 19 is the another kind of fastening type pipe fitting embodiment's one of the present invention an assembling exploded view;
Figure 20 is the another kind of fastening type pipe fitting embodiment's one of the present invention assembling completion figure;
Figure 21 is the partial enlarged drawing of Figure 20 circle part;
Figure 22 is the another kind of fastening type pipe fitting embodiment's two of the present invention an assembling exploded view;
Figure 23 is the another kind of fastening type pipe fitting embodiment's two of the present invention assembling completion figure;
Figure 24 is the partial enlarged drawing of Figure 23 circle part.
In conjunction with the accompanying drawing following reference character of mark above that:
The 1-plastic fastening, the fastening outside thread of 2-, 3-hot melt outer surface, 4-material-storing groove, the 5-hole enlargement mouth of pipe, 6-hot melt internal surface; 7-rubber fastening piece, 8-nut internal thread, 9-fastening nut, 10-first inner plastic, 11-metal outer, 12-metal lining; 13-second inner plastic, 14-metal middle level, 15-plastic outer layer, 16-projection, 17-protuberance, the fastening surface of contact of 18-; The fastening rubber ring of 20-waterproof, the 23-nut mouth of pipe, 26-inner plastic, 27-metal ring, 28-plastic hoop.
Embodiment
Below in conjunction with accompanying drawing, specific embodiments of the invention is described in detail.
Shown in Fig. 1-5; The embodiment one of a kind of fastening type pipe fitting of the present invention discloses a kind of single hot melting fastening type pipe fitting, and this pipe fitting is applicable to the 1st class formation (inner plastic+outer layer metal two layer composite structure), the 2nd class formation (the bonding layer+outer layer metal three-layer composite structure of inner plastic+PUR), the 3rd class formation (inner plastic+metallic intermediate layer+outer layer plastic three-layer composite structure composite pipe), the 4th class formation (five layers of composite structure composite pipe of the bonding layer+outer layer plastic of the bonding layer+metallic intermediate layer of inner plastic+PUR+PUR) in the background technique.
The fastening type pipe fitting of present embodiment; Comprise plastic fastening, rubber fastening piece and fastening nut; Plastic fastening comprises at least one connecting end; Each connecting end communicates with each other through the passage in the plastic fastening, is provided with projection and hot melt outer surface successively from the mediad outer end at each connecting end, and projection is provided with fastening outside thread; The hot melt outer surface can be connected with the plastic liner hot melt of the composite pipe mouth of pipe that is set with rubber fastening piece and fastening nut; The rubber fastening piece that can be sleeved on the composite pipe is arranged between plastic fastening and the fastening nut, the fastening nut internal surface be provided with can be adaptive with fastening outside thread the nut internal thread, fastening nut is through nut internal thread and fastening externally threaded be spirally connected and rubber fastening piece, plastic fastening are nipped into one.
Shown in Fig. 6-7, the embodiment two of a kind of fastening type pipe fitting of the present invention discloses a kind of single hot melting fastening type pipe fitting, and this embodiment is on embodiment one basis, and composite pipe generally satisfies the bigger situation of internal diameter.
Because the composite pipe internal diameter is bigger; Therefore the plastic fastening external diameter is also bigger; The plastic fastening wall thickness is certain, and the connection part ring stiffness of plastic fastening and composite pipe was lower when bore was big, thereby causes the plastic fastening bulk deformation during hot melt easily; Therefore in the hot melt outer surface, be provided with metal lining; Plastic liner that being provided with of metal lining can guarantee the composite pipe mouth of pipe and hot melt outer surface carry out hot melt when handling plastic fastening can not influence the welding effect because of softening transform, guaranteed the soundness and the tightness of the connection of composite pipe.
Other structure and the embodiment one of present embodiment are basic identical, and those skilled in the art combines embodiment one text description and accompanying drawing 6-7, are to be understood that the embodiment of present embodiment, repeat no more at this.
Shown in Fig. 8-10; The embodiment three of a kind of fastening type pipe fitting of the present invention discloses a kind of single hot melting fastening type pipe fitting; The composite pipe of present embodiment is applicable to the 1st class formation (inner plastic+outer layer metal two layer composite structure) in the background technique; Usually, the composite pipe of present embodiment satisfies the thicker situation of inwall plastic layer wall.
In the present embodiment; Composite pipe comprises first inner plastic 10 that is arranged on internal layer and is arranged on outer field metal outer 11; This composite pipe is provided with the hole enlargement mouth of pipe 5 in the fastening external port of connection; This hole enlargement mouth of pipe 5 is processed through hole enlargement by the external port of this composite pipe, is provided with hot melt internal surface 6 in first inner plastic, 10 parts of the internal surface of the hole enlargement mouth of pipe 5.
Single hot melting fastening type pipe fitting of the present invention comprises: plastic fastening 1, rubber fastening piece 7 and fastening nut 9; Plastic fastening 1 comprises at least one connecting end; Each connecting end communicates with each other through the passage in the plastic fastening 1, is provided with projection and hot melt outer surface 3 successively from the mediad outer end at each connecting end, and projection is provided with fastening outside thread 2; The internal surface of fastening nut 9 is provided with nut internal thread 8, nut internal thread 8 and fastening 2 adaptive connections of outside thread.
The tail end of fastening nut 9 is provided with the nut mouth of pipe, and this nut mouth of pipe can be adaptive with the outer surface of rubber fastening piece 7, and the maximum inner diameter of this nut mouth of pipe is less than the maximum outside diameter of rubber fastening piece 7.Preferably; Increase successively in the interior extroversion without leave of fastening nut 9; The external diameter of rubber fastening piece 7 increases from inside to outside successively, and the angle of inclination that the internal diameter of fastening nut 9 increases successively is the 1-10 degree, and the angle of inclination that the external diameter of rubber fastening piece 7 increases successively is the 1-10 degree.
Shown in Fig. 9-10; Single hot melting fastening type pipe fitting of the present invention is sleeved on rubber fastening piece 7 and fastening nut 9 on the composite pipe in use successively successively, and rubber fastening piece 7 is connected to the outer end of the hole enlargement mouth of pipe 5; The hole enlargement mouth of pipe 5 is sleeved on the hot melt outer surface 3; The hot melt outer surface 3 of hot melt internal surface 6 and the connecting end of plastic fastening 1 in the hole enlargement mouth of pipe 5 is adjacent to and carries out hot melt and handle, with connecting end firm couple together of the hole enlargement mouth of pipe 5, then with the direction rotation of fastening nut 9 to plastic fastening 1 with plastic fastening 1; Make nut internal thread 8 along fastening outside thread 2 interlocks; And with rubber fastening piece 7 being fitted in the fastening nut 9 tightly, rubber fastening piece 7 is firmly fastening with the posetionof weld of hot melt outer surface 3 with above-mentioned hot melt internal surface 6, has strengthened the crushing resistance of this position.
Preferably, be respectively equipped with material-storing groove 4, be used to collect hot melt outer surface 3 and be connected the unnecessary melt that produces with hot melt internal surface 6 hot melts of the hole enlargement mouth of pipe 5 of composite pipe in the outer end edges of the connecting end of plastic fastening 1.
Preferably, fastening nut 9 is processed by metal or plastics.
Shown in Figure 11-12, the embodiment four of a kind of fastening type pipe fitting of the present invention is disclosed, present embodiment is on embodiment three basis, and it is less that composite pipe generally satisfies internal diameter, the situation that tube wall is thin.
Because the composite pipe internal diameter is bigger; Because the plastic fastening external diameter is also bigger, the plastic fastening wall thickness is certain, and the connection part ring stiffness of plastic fastening and composite pipe was lower when bore was big; Thereby cause the plastic fastening bulk deformation during hot melt easily; Therefore the inwall at the hot melt outer surface is provided with metal lining 12, and during the plastic liner that can guarantee the composite pipe mouth of pipe is set carries out the hot melt processing with the hot melt outer surface of metal lining 12, the hot melting plastic link can be because of softening transform; Influence the welding effect, guaranteed the soundness and the tightness of the connection of composite pipe.
Other structure of present embodiment is all consistent with embodiment three, repeats no more at this.
Shown in Figure 13-14; The embodiment five of a kind of fastening type pipe fitting of the present invention is disclosed; This pipe fitting is applicable to the 2nd class formation (the bonding layer+outer layer metal three-layer composite structure of inner plastic+PUR) in the background technique; Usually, the composite pipe of present embodiment satisfies the situation that internal diameter is less, tube wall is thicker.
In the present embodiment; Composite pipe comprises second inner plastic 13, metal middle level 14 and plastic outer layer 15 from inside to outside successively; This composite pipe is provided with the hole enlargement mouth of pipe in the fastening external port of connection; This hole enlargement mouth of pipe is processed through hole enlargement by the external port of this composite pipe, is provided with the hot melt internal surface in second inner plastic, 13 parts of the internal surface of the hole enlargement mouth of pipe.
Other structure of present embodiment and embodiment three structure are basic identical, it should be appreciated by those skilled in the art, present embodiment and embodiment's three embodiment is also basic identical, repeats no more at this.
Shown in Figure 15-16, the embodiment six of a kind of fastening type pipe fitting of the present invention is disclosed, present embodiment is on embodiment five basis, and composite pipe generally satisfies the bigger situation of internal diameter.
The embodiment of present embodiment is on embodiment four basis; Composite pipe among the embodiment five replaced obtain; Those skilled in the art combines embodiment four, embodiment five should obtain the embodiment of present embodiment, repeats no more at this.
Single hot melting fastening type pipe fitting of the present invention goes for the use sight of multiple composite pipe, is connected firmly; Anti-stress is strong, and good airproof performance is easy to use; Special in the less composite pipe of internal diameter, it is fastening especially firmly, sealing is especially good, anti-stress is especially strong.
Like Figure 17-shown in Figure 21; The another kind of fastening type pipe fitting embodiment one of present embodiment discloses the multi-sealed fastening type pipe fitting of a kind of medium-high frequency induction heating; Adopt ultrasonic sensing (also the crying the medium-high frequency induction) heating technology of technology maturation; Comprise plastic fastening 1, fastening nut 9; Plastic fastening 1 comprises two connecting ends; Each connecting end communicates with each other through the passage in the plastic fastening 1, is provided with projection 16 and fastening surface of contact 18 successively from the mediad outer end at each connecting end, and projection 16 direction outward is provided with protuberance 17; Protuberance 17 is connected with the composite pipe tube wall is adaptive with recessed space between the fastening surface of contact 18; It is surperficial with the hot melt of composite pipe that the surface of contact of fastening surface of contact 18, protuberance 17 and composite pipe forms the multi-sealed fastening type pipe fitting of medium-high frequency induction heating, on projection 16, is provided with fastening outside thread 2, the internal surface of fastening nut 9 be provided with can be adaptive with fastening outside thread 2 nut internal thread 8; Fastening nut 9 through nut internal thread 8 and fastening outside thread 2 be spirally connected and plastic fastening 1 is nipped into one, this composite pipe comprises three layers of ecto-entad: plastic outer layer 15, metal middle level 14 and inner plastic 26 or ecto-entad five layers: plastic outer layer, heat-fusing glue layer, metal middle level, heat-fusing glue layer, inner plastic.
Need to prove that if the multi-sealed fastening type pipe fitting of medium-high frequency induction heating is used to connect two composite pipes, its Placement will comprise two connecting ends, shown in present embodiment; If the multi-sealed fastening type pipe fitting of medium-high frequency induction heating is used to connect the tail end of a composite pipe, the multi-sealed fastening type pipe fitting of medium-high frequency induction heating will include only a connecting end, link to each other with composite pipe.
Preferably, fastening nut 9 is processed by plastics or metal.
Wherein, the multi-sealed fastening type pipe fitting of medium-high frequency induction heating also comprises the fastening rubber ring 20 of waterproof, and it is installed between plastic fastening 1, the fastening nut 9.
In the embodiment one of the multi-sealed fastening type pipe fitting of medium-high frequency induction heating of the present invention; Tail end at fastening nut 9 is provided with the nut mouth of pipe 23; The nut mouth of pipe 23 is adaptive with the outer surface of composite pipe; Increase successively in the interior extroversion without leave of fastening nut 9, the angle of inclination that the internal diameter of fastening nut 9 increases successively is the 1-10 degree.
The multi-sealed fastening type pipe fitting of medium-high frequency induction heating of present embodiment in use; Earlier fastening nut 9, the fastening rubber ring 20 of waterproof plug-in mounting are successively gone into the composite pipe mouth of pipe; At first just the mouth of pipe plug-in mounting of composite pipe advances the recessed space between protuberance 17 and the fastening surface of contact 18; High frequency induction welder is arranged on the surface of contact of fastening surface of contact 18, protuberance 17 and composite pipe; During high frequency induction welder energising work, the high-frequency electromagnetic oscillating wave that welding machine produces can make metal middle level 14 heat fused, and the fastening surface of contact in 14 pairs in metal middle level 18, protuberance 17 carry out hot melt with the multi-sealed fastening type pipe fitting of medium-high frequency induction heating of the surface of contact formation of composite pipe with the hot melt surface of composite pipe and be connected; Then the direction of fastening nut 9 to plastic fastening 1 compressed; The fastening outside thread 2 of nut internal thread 8 interlocks of fastening nut 9, with the direction extruding tightly of the fastening rubber ring 20 of waterproof to plastic fastening 1, thus composite pipe and the multi-sealed fastening type pipe fitting of medium-high frequency induction heating is firmly fixing.
Shown in Figure 22-24; The another kind of fastening type pipe fitting embodiment two of present embodiment discloses the multi-sealed fastening type pipe fitting of a kind of medium-high frequency induction heating; Only have a place different with Figure 19 embodiment (embodiment one), Figure 19 embodiment's the compound mouth of pipe is the non-hole enlargement mouth of pipe, and the compound mouth of pipe of present embodiment is the hole enlargement mouth of pipe; This hole enlargement mouth of pipe is processed through hole enlargement by the external port of this composite pipe
Other part is identical with Figure 19 embodiment, repeats no more at this.
The multi-sealed fastening type pipe fitting of medium-high frequency induction heating of the present invention; Go for the use sight of multiple composite pipe, be connected firmly, anti-stress is strong; Good airproof performance; Easy to use, special in the less composite pipe of internal diameter, it is fastening especially firmly, sealing is especially good, anti-stress is especially strong.
More than disclosedly be merely several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (10)
1. fastening type pipe fitting; It is characterized in that; Comprise plastic fastening, rubber fastening piece and fastening nut; Said plastic fastening comprises at least one connecting end; Each connecting end communicates with each other through the passage in the said plastic fastening, is provided with projection and hot melt outer surface successively from the mediad outer end at each connecting end, and said projection is provided with fastening outside thread; Said hot melt outer surface can be connected with the plastic liner hot melt of the composite pipe mouth of pipe that is set with said rubber fastening piece and fastening nut; The said rubber fastening piece that can be sleeved on the said composite pipe is arranged between said plastic fastening and the fastening nut, said fastening nut internal surface be provided with can be adaptive with said fastening outside thread the nut internal thread, said fastening nut is through said nut internal thread and fastening externally threaded be spirally connected and said rubber fastening piece, plastic fastening are nipped into one.
2. fastening type pipe fitting according to claim 1 is characterized in that, the mouth of pipe that is connected with said hot melt outer surface hot melt is the hole enlargement mouth of pipe, and the position that said hot melt connects is the hot melt internal surface of the said composite pipe hole enlargement mouth of pipe.
3. fastening type pipe fitting according to claim 1 and 2; It is characterized in that; Tail end at said fastening nut is provided with the nut mouth of pipe, and the outer surface of the said nut mouth of pipe and said rubber fastening piece is adaptive, and the maximum inner diameter of the said nut mouth of pipe is less than the maximum outside diameter of said rubber fastening piece.
4. fastening type pipe fitting according to claim 1 and 2 is characterized in that, increases successively in the interior extroversion without leave of said fastening nut, and the external diameter of said rubber fastening piece increases from inside to outside successively; And/or,
The angle of inclination that the internal diameter of said fastening nut increases successively is the 1-10 degree, and the angle of inclination that the external diameter of said rubber fastening piece increases successively is the 1-10 degree.
5. fastening type pipe fitting according to claim 1 and 2 is characterized in that, also comprises metal lining, and said metal lining can be arranged in the port of connecting end of said plastic fastening; And/or said metal lining is processed by copper or stainless steel.
6. fastening type pipe fitting according to claim 1 and 2; It is characterized in that, be respectively equipped with in the outer end edges of the connecting end of said plastic fastening and be used to collect said hot melt outer surface is connected the unnecessary melt that produces with the plastic liner hot melt of the said composite pipe mouth of pipe material-storing groove.
7. fastening type pipe fitting according to claim 1 and 2 is characterized in that said fastening nut is processed by metal or plastics.
8. fastening type pipe fitting; It is characterized in that; Comprise plastic fastening, fastening nut; Said plastic fastening comprises at least one connecting end; Each said connecting end communicates with each other through the passage in the said plastic fastening, is provided with projection and fastening surface of contact successively from the mediad outer end at each said connecting end, and said projection direction outward is provided with protuberance; Recessed space between said protuberance and the said fastening surface of contact with treat that the fastening composite pipe mouth of pipe of hot melt is adaptive; The surface of contact of said fastening surface of contact, protuberance and said composite pipe forms the hot melt surface of said fastening type pipe fitting and composite pipe, on said projection, is provided with fastening outside thread, the internal surface of said fastening nut be provided with can be adaptive with said fastening outside thread the nut internal thread; Said fastening nut is through said nut internal thread and fastening externally threaded be spirally connected and said plastic fastening is nipped into one, and the said fastening composite pipe of hot melt of treating comprises three layers of ecto-entad: plastic outer layer, metal middle level and inner plastic or ecto-entad five layers: plastic outer layer, heat-fusing glue layer, metal middle level, heat-fusing glue layer, inner plastic.
9. fastening type pipe fitting according to claim 8 is characterized in that said fastening nut is processed by plastics or metal.
10. fastening type pipe fitting according to claim 8 is characterized in that, also comprises the fastening rubber ring of waterproof, and the fastening rubber ring of said waterproof is clipped between said plastic fastening, the fastening nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102400424A CN102141178B (en) | 2010-02-03 | 2010-07-29 | Fastening type pipe fitting |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010110848.1 | 2010-02-03 | ||
| CN201010110848 | 2010-02-03 | ||
| CN2010102400424A CN102141178B (en) | 2010-02-03 | 2010-07-29 | Fastening type pipe fitting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102141178A CN102141178A (en) | 2011-08-03 |
| CN102141178B true CN102141178B (en) | 2012-07-25 |
Family
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102400424A Expired - Fee Related CN102141178B (en) | 2010-02-03 | 2010-07-29 | Fastening type pipe fitting |
| CN2010202753510U Expired - Lifetime CN201858446U (en) | 2010-02-03 | 2010-07-29 | Fastening type pipe fitting |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202753510U Expired - Lifetime CN201858446U (en) | 2010-02-03 | 2010-07-29 | Fastening type pipe fitting |
Country Status (1)
| Country | Link |
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| CN (2) | CN102141178B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102141178B (en) * | 2010-02-03 | 2012-07-25 | 杨蒙 | Fastening type pipe fitting |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0233608A1 (en) * | 1986-02-17 | 1987-08-26 | Metzeler Kautschuk Gmbh | Shaped hose branching, especially a radiator hose for a motor vehicle,and process for manufacturing the same |
| CN1873283A (en) * | 2006-06-15 | 2006-12-06 | 佛山市日丰企业有限公司 | Socket pipe piece of heat melted connection |
| CN101144556A (en) * | 2006-09-13 | 2008-03-19 | 佛山市日丰企业有限公司 | Hot-smelting connection socket pipe connection method |
| CN101498385A (en) * | 2008-01-30 | 2009-08-05 | 甘国工 | Metal framework reinforced plastic composite pipes and method for manufacturing the same |
| CN201858446U (en) * | 2010-02-03 | 2011-06-08 | 杨蒙 | Fastening type pipe fitting |
-
2010
- 2010-07-29 CN CN2010102400424A patent/CN102141178B/en not_active Expired - Fee Related
- 2010-07-29 CN CN2010202753510U patent/CN201858446U/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0233608A1 (en) * | 1986-02-17 | 1987-08-26 | Metzeler Kautschuk Gmbh | Shaped hose branching, especially a radiator hose for a motor vehicle,and process for manufacturing the same |
| CN1873283A (en) * | 2006-06-15 | 2006-12-06 | 佛山市日丰企业有限公司 | Socket pipe piece of heat melted connection |
| CN101144556A (en) * | 2006-09-13 | 2008-03-19 | 佛山市日丰企业有限公司 | Hot-smelting connection socket pipe connection method |
| CN101498385A (en) * | 2008-01-30 | 2009-08-05 | 甘国工 | Metal framework reinforced plastic composite pipes and method for manufacturing the same |
| CN201858446U (en) * | 2010-02-03 | 2011-06-08 | 杨蒙 | Fastening type pipe fitting |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102141178A (en) | 2011-08-03 |
| CN201858446U (en) | 2011-06-08 |
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