CN2929427Y

CN2929427Y - Plastic pipeline joint

Info

Publication number: CN2929427Y
Application number: CN 200620103576
Authority: CN
Inventors: 叶福西; 叶伦
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-05-15
Filing date: 2006-05-15
Publication date: 2007-08-01
Anticipated expiration: 2016-05-15

Abstract

The utility model belongs to a pipe connecting fastener, in particular to a plastic pipe connector, which substantially comprises a connector body (1), a locking nut (4) which engages with the screw thread of the connector, a break (3.2) is opened on the end portion of a locking ring (3) forming flap shape, and the inner wall of each flap is provided with a teeth edge (3.1). The utility model is characterized in that the front and the end portion of the locking ring (3) engages with the inclined surface of the inner wall of the locking nut (4), the front portion of the locking ring (3) is against a seal ring (2), the connector body (1) is integrally provided with a rigid inside pipe (6) with the same axial center, and the external diameter of the inside pipe engages with the internal diameter of a connected connecting pipe. Making use of the plastic pipes or plastic-aluminum or plastic-steel multi-unit pipes connected with the utility model can not only increase the seal effect, but also increase the resisting pull-off performance, which can be further made to a straight-through, an angular, a triplet or a four-way or the like.

Description

A kind of plastic pipe connecting head

Technical field

The utility model belongs to pipeline and connects fastening piece, particularly is applicable to the joint that is used with plastic tube or steel/aluminium-plastic composite pipe.

Background technique

Plastic tube or aluminium-plastic composite pipe now substitute traditional galvanized pipe just more and more, and the various terminal that is mated use also occurs.But a large amount of copper sleeve Heavy Weight, work efficiencies of using are low on the market, cost is high, and anti-bursting by freezing and decay resistance are also relatively poor.Particularly metal and plastics expand with heat and contract with cold asynchronously, very easily produce under the violent situation of cold and hot variation and leak.Also have a kind of semimetal plastic joint, the effective metal circular tube of its core is made, but technology difficulty is big, require the core pipe that accurate concentric shafts is arranged, otherwise leak easily, and the surface can't make darker concavo-convex ring, connected tube breaks away from easily during use.In addition, existing metal joint and terminal thing (such as water tap) spiral shell connect, and must twine raw meal belt in case leak between screw thread, bother during piping erection.

Summary of the invention

The purpose of this utility model provides and a kind ofly corrosion-resistantly, anti-leaks, tension is taken off and plastic pipe connecting head with low cost.

The utility model mainly comprise joint body and with the locking cap of its screw-thread fit, the clamp ring tail end has breach and forms flap, every lobe inwall is shaped on tip surface, the front end and back end that it is characterized in that clamp ring cooperates with the inwall inclined-plane of locking cap, the front end of clamp ring pushes up mutually with seal ring, one is shaped on the concentric internal lining pipe in the joint body, and this internal lining pipe external diameter cooperates with the connected tube internal diameter.

Above-mentioned seal ring is frustoconic shape, and the cross section of circle is trapezoidal.

The thread matching structure of joint body and locking cap is that joint body is made outer buttress thread, and locking cap is made interior buttress thread.

The appearance leading portion of locking cap is shaped on spaced rib, and back segment is made the hexagon nut body.

The plastic tube or the aluminium/composite metal plastic pipe that utilize the utility model to connect because connecting head adopts the highstrenghtpiston, are difficult for bursting by freezing winter, and be corrosion-resistant, enlarged the application area of plastic tube or plastic-aluminum pipe; Especially one is shaped on the concentric internal lining pipe with rigidity in the joint body, after lining is gone into connected pipe, can prevent causing after locking cap screws the connected tube depression and the destruction sealing.The inclined-plane cooperating structure at clamp ring two ends, when the generation of seal ring place is leaked, the inside precession of locking cap, exerting pressure forward in its top, changes the seal ring state, also makes clamp ring produce inside cohesive force, both strengthened sealing effect, also strengthened tension and taken off performance.Multiple patterns such as that the utility model also can be made into is straight-through, the angle logical, threeway or four-way.

Description of drawings

Fig. 1 is the straight-through example structure schematic representation of the utility model.

Fig. 2 is the sectional view of seal ring.

Fig. 3 is the sectional view of clamp ring.

Fig. 4 is the right elevation of Fig. 3.

Embodiment

With reference to Fig. 1, Fig. 2, the utility model adopts nontoxic, anti-corrosion highstrenghtpiston to make.The internal thread of joint body 1 left end is threaded with water source tube, and right-hand member is shaped on outer buttress thread form and is connected with the zigzag fashion internal thread of locking cap 4, and buttress thread form has stronger anti-retaining performance; One is shaped on the internal lining pipe 6 of concentric in the joint body 1, and connects by plastic pipe 7 by clamp ring 3, locking cap 4.The front end and back end of clamp ring 3 cooperates with the inwall inclined-plane of locking cap 4, and clamp ring 3 front ends push up mutually with frustoconic shape seal ring 2 big opening ends.The appearance leading portion of locking cap 4 is shaped on spaced rib 4.1, and back segment is made hexagon nut body 4.2, can be when installation or removal manually and spanner turn, and profile is more attractive in appearance.

With reference to Fig. 3, Fig. 4, clamp ring 3 two ends are the conical surface, tail end has slot 3.2 to form flap, shape is similar to the plastic expansion cover of swell fixture, and clamp ring 3 every lobe inwalls are shaped on tip surface 3.1, when the inside precession of locking cap 4, because the effect on inclined-plane, clamp ring 3 flaps tighten embraces connected tube 7, and the effect of lobe inwall tip surface 3.1 and seal ring 2 in addition can make the anti-pulling-out force of connected tube 7 obviously improve.

Connection procedure: connected tube 7 pierces into locking cap 4 earlier, put clamp ring 3, seal ring 2 successively, seal ring 2 osculums are inside, firmly make internal lining pipe 6 fill in connected tube 7 mouths of pipe on earth again until the mouth of pipe, screw locking cap 4 at last, seal ring 2, the clamp ring 3 in it puts in place naturally and forms sealing and banding connected tube 7.

Claims

1, a kind of plastic pipe connecting head, mainly comprise joint body (1) and with the locking cap (4) of its screw-thread fit, clamp ring (3) tail end has breach (3.2) and forms flap, every lobe inwall is shaped on tip surface (3.1), the front end and back end that it is characterized in that clamp ring (3) cooperates with the inwall inclined-plane of locking cap (4), the front end of clamp ring (3) pushes up mutually with seal ring (2), and the interior one of joint body (1) is shaped on concentric rigid liner pipe (6), and this internal lining pipe external diameter cooperates with the connected tube internal diameter.

2, plastic pipe connecting head according to claim 1 is characterized in that seal ring (2) is frustoconic shape, and the cross section of circle is trapezoidal.

3, plastic pipe connecting head according to claim 1, it is characterized in that the thread matching structure of joint body (1) and locking cap (4) is: joint body is made outer buttress thread, and locking cap is made interior buttress thread.

4, plastic pipe connecting head according to claim 1 is characterized in that the appearance leading portion of locking cap (4) is shaped on spaced rib (4.1), and back segment is made hexagon nut body (4.2).