CN103615609A

CN103615609A - Pipe joint

Info

Publication number: CN103615609A
Application number: CN201310663114.XA
Authority: CN
Inventors: 魏学惠
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-12-10
Filing date: 2013-12-10
Publication date: 2014-03-05

Abstract

A pipe joint comprises a pipe body, wherein a metal layer provided with threads is arranged on the pipe body, one part of the pipe wall of the pipe body is of a three-layer structure, the inner layer and the outer layer of the three-layer structure are non-metal layers, one part of the metal layer extends to the position between the inner layer and the outer layer to serve as the middle layer of the three-layer structure, the middle layer is at least provided with one through hole, the inner layer and the inner layer are connected as a whole through non-metal materials penetrating through the through hole, and the inner layer, the middle layer and the outer layer are tightly connected. By means of the structure, few metal materials and injection molding materials are used for mutual action, a large quantity of the metal materials are saved, manufacturing cost is greatly reduced, and intensity of the pipe joint can be guaranteed. Besides, the through hole is formed in the metal layer, the non-metal inner layer and the non-metal outer layer are connected as a whole through the non-metal materials penetrating through the through hole, and the inner layer, the middle layer and the outer layer are tightly connected, so that relative moving of the metal layer and the non-metal layers can be avoided in large-torque installation work, and the sealing effect of the pipe body is guaranteed.

Description

A kind of pipe joint

Technical field

The present invention relates to a kind of pipe joint, relate in particular to the pipe joint that a kind of injected plastics material and metallic material are composited.

Background technique

Metal tube is widely used owing to having good strength and stiffness.But metal, particularly non-ferrous metal are more expensive and belong to limited resources, not only make the cost of pipe increase, and be unfavorable for protection of the environment and economize on resources.Due to the electric conductivity of metal tube, also make its application be subject to certain limitation in addition.Although nonmetallic pipe has insulation effect, and cost is lower, because nonmetallic intensity is limited, is often difficult to meet usage requirement.For addressing this problem, adopting tube wall is the double-layer composite pipe of metal layer and non-metallic layer, both can improve its strength and stiffness, can meet insulating requirements again, thus make it adapt to different usage requirements and cost lower.When prepared by this bimetallic tube, conventionally prefabricated metal section is placed in to mould again at metal tube outer wall injection moulding one deck injected plastics material layer.Online fast when power hand tool is installed in order to prevent, the connection of metal layer and non-metallic layer goes to pot and relative movement occurs, impact sealing is even scrapped, and has by spline opening and locking trough being set on non-metallic layer to arrive the object that prevents metal layer and non-metallic layer generation relative movement in prior art.But this mode, when compared with high pulling torque installation exercise, is still difficult to avoid above-mentioned metal layer and non-metallic layer generation relative movement.

Summary of the invention

Problem to be solved by this invention is to provide a kind of pipe joint, this pipe joint not only uses less metallic material, can guarantee the intensity of pipe joint, again can be when compared with high pulling torque installation exercise, avoid metal layer and non-metallic layer generation relative movement, guarantee the sealing effect of pipe joint.

Technological scheme provided by the invention is: a kind of pipe joint, comprise body, body is provided with the threaded metal layer of tool, a part for body tube wall is three-decker, internal layer and the skin of described three-decker are non-metallic layer, and a described metal layer part extends between internal layer and skin as the mesosphere in three-decker; On described mesosphere, be at least provided with a penetration hole, internal layer and skin are connected as a single entity by the nonmetallic material through penetration hole, and internal layer, mesosphere and skin are closely connected.

The perforation direction of penetration hole of the present invention can radially arrange along body.

Or described mesosphere is to be located at metal layer end and to be the metal rim of one with metal layer, penetration hole is located on metal rim, and the perforation direction of penetration hole axially arranges along body.

Between described metal layer and non-metallic layer, be provided with seal ring.

The present invention is owing to adopting said structure, use less metallic material and injected plastics material as plastics or the interaction of modifying plastics reinforced composite, both a large amount of metallic material (particularly nonferrous materials) had been saved, greatly reduce product cost, can guarantee the intensity of pipe joint again, and by penetration hole being set on the intermediate metal layer in the three-decker of pipe joint, in nonmetal, skin is connected as a single entity by the nonmetallic material through penetration hole, and make internal layer, mesosphere is closely connected with outer, can be when compared with high pulling torque installation exercise, avoid metal layer and non-metallic layer generation relative movement (thering is the metal layer of making spline and retaining effect), guarantee the sealing effect of pipe joint.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of structure of the present invention.

Fig. 2 is the A-A view of Fig. 1.

Fig. 3 is to be the structural representation of the tapped metal layer of the present invention.

Fig. 4 is to be the structural representation of the externally threaded metal layer of band of the present invention.

Embodiment

Below in conjunction with accompanying drawing, the invention will be further described but do not limit the scope of the invention, the non-intrinsically safe carrying out based on the present invention revise and character pair be equal to replacement, all can fall into protection scope of the present invention.

Referring to Fig. 1-4, the present invention includes body 1, the tube wall of a body part or one section be three-decker, and the mesosphere in described three-decker is metal layer 4,3.1, and internal layer 2.1 and skin 2.2 are non-metallic layer; On described metal layer 4,3.1, be at least provided with a

penetration hole

5,10, internal layer 2.1 and outer 2.2 is connected as a single entity by the nonmetallic material through

penetration hole

5,10, and internal layer 2.1, mesosphere 4,3.1 are closely connected with outer 2.2.

As shown in Figure 1, described penetration hole 10(is referring to Fig. 2) perforation direction along body, radially arrange, non-metallic layer 2 can be by injection moulding mode through penetration hole 10 and form internal layer 2.1 and outer 2.2, internal layer 2.1 and outer 2.2 is by metal intermediate layer 3.1 lockings.Or at metal layer outer wall, metal rim 4 is set, metal rim 4 is provided with penetration hole 5, the perforation direction of penetration hole 5 axially arranges along body, non-metallic layer 2 is passed penetration hole 5 and is formed internal layer 2.1 and skin 2.2 by injection moulding mode, and internal layer 2.1 and outer 2.2 locks metal intermediate layer metal rim 4.

Between metal layer 3 of the present invention and non-metallic layer 2, be provided with seal ring 6, described seal ring 6 is in the mode of metal tube outer wall injection moulding one deck injected plastics material layer, to be located between metal layer 3 and non-metallic layer 2 by the prefabricated metal section that seal ring is housed being placed in to mould again.

The tube wall of above-mentioned metal layer 3 is provided with seal ring draw-in groove 7, and seal ring 6 is contained on metal layer tube wall and is embedded in seal ring draw-in groove 7.

The present invention can adopt the metal layer 3 with mouth of pipe screw thread 8, metal layer 3 is an integral body with the metal intermediate layer 3.1 in three-decker, when mouth of pipe screw thread 8 is internal thread, open section is metal threaded 8, inner segment is for metal threaded 8 coaxial same footpaths and be located at the nonmetal screw thread 9 on non-metallic layer, and the another side of metal layer 3 (outer tube wall) is closely connected by injection moulding mode with non-metallic layer; When mouth of pipe screw thread 8 is outside thread, the another side of metal layer 3 (inner tubal wall) and non-metallic layer are by the tight connecting body of injection moulding mode.The present invention also can be by metal layer 3 without the inside and outside wall of one section, screw thread and non-metallic layer by the tight connecting body of injection moulding mode.

Claims

1. a pipe joint, comprise body, body is provided with the threaded metal layer of tool, it is characterized in that: a part for body tube wall is three-decker, internal layer and the skin of described three-decker are non-metallic layer, and a described metal layer part extends between internal layer and skin as the mesosphere in three-decker; On described mesosphere, be at least provided with a penetration hole, internal layer and skin are connected as a single entity by the nonmetallic material through penetration hole, and internal layer, mesosphere and skin are closely connected.

2. pipe joint according to claim 1, is characterized in that: the perforation direction of described penetration hole radially arranges along body.

3. pipe joint according to claim 1, is characterized in that: described mesosphere is to be located at metal layer end and to be the metal rim of one with metal layer, and penetration hole is located on metal rim, and the perforation direction of penetration hole axially arranges along body.

4. according to the pipe joint described in claim 1 or 2 or 3, it is characterized in that: between metal layer and non-metallic layer, be provided with seal ring.