CN201166225Y

CN201166225Y - Tube joint

Info

Publication number: CN201166225Y
Application number: CNU2008200321163U
Authority: CN
Inventors: 张显宝
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-03-13
Filing date: 2008-03-13
Publication date: 2008-12-17
Anticipated expiration: 2018-03-13

Abstract

The utility model relates to a joint structure of a pipeline, in particular to a pipe joint. The utility model comprises a metal pipe joint and thread portions which are connected with other pipe joints, ring gear type concave portions are arranged on an outer pipe wall where the metal pipe joint and a plastic pipeline are connected, a concave surface type transition portion is arranged between the concave portions, the width of an opening of the transition portion is smaller than the width of the inner portion thereof, and the metal joint is connected with the plastic pipeline through hot melt. The utility model has excellent sealing property, and is easy to achieve.

Description

A kind of pipe joint

Technical field

The utility model relates to the joint structure of pipeline, is specifically related to a kind of pipe joint.

Background technique

The existing a large amount of employing plastic pipe of indoor Pipeline, generally use metallic pipe coupling to connect between the plastic pipe, because the thermal expansion coefficient of plastic pipe and metallic pipe coupling is different, thereby make in many cases, the slit occurs between plastic pipe and the metallic pipe coupling and cause pipe leakage, this kind situation is particularly evident when pipeline is used for the delivering hot water.

Summary of the invention

The purpose of this utility model provides a kind of good pipe joint, its good airproof performance and be easy to realize.

For achieving the above object, the utility model has adopted following technological scheme: a kind of pipe joint, comprise the screw section that metallic pipe coupling is connected with other pipe joints, the outside tube wall that described metallic pipe coupling links to each other with plastic pipe is provided with the protuberance of gear ring shape, be provided with the transition part of concave shape between the protuberance, the width of the opening of transition part is less than the width of its inside, and metal joint is that hot melt is connected with plastic pipe.

As shown from the above technical solution, because the utility model is provided with the transition part of concave shape between protuberance, thereby when plastic pipe was connected with the metallic pipe coupling hot melt, plastic materials can be abound with on transition part; Because of the width of the opening of transition part width less than its inside, when the plastic pipe expanded by heating, the plastic materials that is abound with at transition part will more closely be resisted against on the wall of transition part inboard, thereby has strengthened the switching performance of plastic pipe and metallic pipe coupling.From the above, the utility model good airproof performance and be easy to realize.

Description of drawings

Fig. 1,2, the 4th, the bottom of transition part is the joint structure schematic representation of flat;

Fig. 3 is that the bottom of transition part is circular-arc joint structure schematic representation;

Fig. 5 is the structural representation that metallic pipe coupling is positioned at the end face of plastic pipe;

Fig. 6 is the connection diagram that has the metallic pipe coupling of internal thread.

Embodiment

Shown in Fig. 1～4, a kind of pipe joint, comprise the screw section 10 that metallic pipe coupling is connected with other pipe joints, the outside tube wall that described metallic pipe coupling links to each other with plastic pipe is provided with the protuberance 20 of gear ring shape, be provided with the transition part 30 of concave shape between the protuberance 20, the width of the opening of transition part 30 is less than the width of its inside, and metal joint is that hot melt is connected with plastic pipe.

The width of the opening of transition part 30 can have multiple implementation less than the width of its inside, and as preferred version of the present utility model, the bottom of described transition part 30 is circular-arc or flat, shown in Fig. 1～4.And adopt the transition part 30 of above-mentioned cross section, and be convenient to processing on the one hand, also better with the binding ability of plastic pipe on the other hand.

As preferred version of the present utility model, the bottom of the flat of described transition part 30 is connected with curved arc with its both sides, as shown in Figure 2.

The Placement of above-mentioned curved arc shape can make plastic materials be filled in preferably in the transition part 30, thereby has increased the area of contact of plastic materials and transition part 30, has strengthened the switching performance of plastic pipe and metallic pipe coupling.

As another kind of preferred version of the present utility model, be provided with projection 40 equably on the end face that is positioned at plastic pipe inside of described metallic pipe coupling, as shown in Figure 5.After projection 40 is set, increased the area of contact of metallic pipe coupling and plastic pipe, thereby made combination degree between the two more firm.

Shown in Fig. 1～4, width 21 maximums of the protuberance 20 of the described outer most edge that is positioned at metallic pipe coupling and plastic tube joint.The outer most edge of metallic pipe coupling and plastic tube joint promptly refers to be positioned at compared to metallic pipe coupling an other end of plastic pipe internal heads herein, also this outer most edge is defined as the front side of metallic pipe coupling herein.When the protuberance 20 that is positioned at the metallic pipe coupling front side is provided with bigger width; can increase the area of contact of metallic pipe coupling and plastic pipe equally; thereby the combination degree that makes the front side of metallic pipe coupling and plastic pipe is more firm than the combination degree of the rear side of metallic pipe coupling and plastic pipe; in these cases; when even if the binding ability of the rear side of metallic pipe coupling and plastic pipe is damaged between generation slit because of certain situation; the front side of metallic pipe coupling can keep state preferably with combining still of plastic pipe, thereby has protected the normal water supply work of plastic pipe most possibly.

As the utility model preferred version further, described transition part 30 is set to 2～3, and transition part 30 residing positions are parallel to each other, shown in Fig. 1～4,6.

Above-mentioned set-up mode is convenient to processing, makes that under the situation of not wasting metallic material the binding ability of metallic pipe coupling and plastic pipe is better, and has satisfied stressed needs between the two.

The utility model can be applicable to various pipe joints, and accompanying drawing 1～4 is shown as the metallic pipe coupling that has external thread part, and accompanying drawing 6 is then for having the metallic pipe coupling of internal thread part.

Claims

1, a kind of pipe joint, comprise the screw section (10) that metallic pipe coupling is connected with other pipe joints, it is characterized in that: the outside tube wall that described metallic pipe coupling links to each other with plastic pipe is provided with the protuberance (20) of gear ring shape, be provided with the transition part (30) of concave shape between the protuberance (20), the width of the opening of transition part (30) is less than the width of its inside, and metal joint is that hot melt is connected with plastic pipe.

2, pipe joint according to claim 1 is characterized in that: the bottom of described transition part (30) is circular-arc or flat.

3, pipe joint according to claim 1 is characterized in that: be provided with projection (40) on the end face that is positioned at plastic pipe inside of described metallic pipe coupling equably.

4, pipe joint according to claim 1 is characterized in that: width (21) maximum of the protuberance (20) of the described outer most edge that is positioned at metallic pipe coupling and plastic tube joint.

5, pipe joint according to claim 1 and 2 is characterized in that: described transition part (30) is set to 2～3, and the residing position of transition part (30) is parallel to each other.

6, pipe joint according to claim 2 is characterized in that: the bottom of the flat of described transition part (30) is connected with curved arc with its both sides.