CN2536883Y

CN2536883Y - Plastic pipe connector

Info

Publication number: CN2536883Y
Application number: CN 01227198
Authority: CN
Inventors: 杨宝刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-06-18
Filing date: 2001-06-18
Publication date: 2003-02-19
Anticipated expiration: 2011-06-18

Abstract

The utility model discloses a connecting piece for plastic pipes, mainly comprising a fastener and a pipe joint, wherein the pipe joint is composed of an inner pipe joint and an outer pipe joint; the inner pipe joint and the outer piper joint both are provided with an extending skirt part at one end; the two skirt parts are overlapped and certain space is left between the inner pipe joint and the outer pipe joint; a convex ring bulged inwards is arranged at one end of the fastener and inner screw threads are arranged in the fastener for connecting with other pipelines. The utility model has an advantage that tight contact with plastic pipes is ensured by making use of outer pressure and inner expansion so that the phenomenon of leakage is avoided.

Description

The link of plastic tube

Relate to a kind of pipe joint in this real type, more particularly, relate to a kind of link that plastic tube is connected with other pipelines that is used for.

At present, the link that is used to connect aluminium-plastic composite pipe on the market is various in style, but the structure that can divide screw thread pressure-connected type and two kinds of Placements of FERRULETYPE basically, wherein again based on the screw thread pressure-connected type, the link that utilizes this Placement to connect mainly is the outside that plastic tube is directly inserted in the link pipe joint, and be arranged with seal ring in case leak-stopping water compresses by a fastening piece in the plastic tube outside again in the outside of pipe joint.But this link can't fully be removed the clearance issues between plastic tube inwall and the link pipe joint, and therefore, the phenomenon that often has pipe fitting to leak in engineering takes place.

In addition, therefore the internal diameter of this link pipe joint, can cause jet less than the internal diameter of plastic tube when water flows into link from plastic tube, and water resistance is increased, and influences water velocity.

For this reason, the purpose of this utility model is to provide a kind of gap that can thoroughly remove between plastic tube inwall and the link pipe joint, thereby effectively prevents the link of water leakage phenomenon.

Another purpose of the present utility model is to provide a kind of link that can not influence water velocity.

To achieve these goals, the link of plastic tube mainly is made of a fastening piece and a pipe joint in the utility model, wherein, pipe joint is made of an inner pipe joint and an outer tube joint, wherein inner pipe joint and outer tube joint all are extended with the skirt section at an end separately, and this two skirt section stacks together mutually, and leaves certain clearance between two tube walls of inner and outer pipe joint; Described fastening piece is provided with an inwardly protruded bulge loop at the one end, and portion is provided with the internal thread that can be connected with other pipelines within it.

In addition, the skirt section of described inner pipe joint utilizes other instruments compressed together after the skirt section of outer tube joint can being coated on its inside; Also the skirt section of inner pipe joint and outer tube joint can be linked together by welding manner in mutual stacked back.

In addition, can establish a seal washer in described fastening piece inside, to prevent seepage.

Link in the utility model has adopted the Placement that expands in the external pressure closely to contact with the inside and outside wall of plastic tube, thereby the seepage phenomenon of link has further been eradicated in the gap of having removed inner pipe joint and plastic tube inwall.

Simultaneously, inner pipe joint after expansion with the inwall size basically identical of plastic tube, thereby can not influence the flowing velocity of liquid in pipe.

Below in conjunction with accompanying drawing the most preferred embodiment in the utility model is described in further detail.

Fig. 1 is that the link of plastic tube in the utility model partly cuts open schematic representation when user mode;

Fig. 2 is the structure cross-sectional schematic of pipe joint in the utility model;

As shown in Figure 1, the pipe connecting member of plastics material in the utility model constitutes main body by the pipe joint 2 that a fastening piece 1 and that is provided with internal thread 11 is sheathed on plastic tube 3 terminations.Wherein, fastening piece 1 convexes with a bulge loop 12 at the one end toward in.

As shown in Figure 2, pipe joint 2 is made of the outer tube joint 22 that an inner pipe joint 21 and that is inserted in plastic tube 3 port inside is placed in plastic tube 3 port outsides, and be outward extended with a skirt section 211 in an end of inner pipe joint 21, simultaneously, also be extended with a skirt section 221 at an end of outer tube joint 22.Wherein, the skirt section 221 of outer tube joint 22 is stacked and placed on 211 tops, skirt section of inner pipe joint 21, and the skirt section 211 of inner pipe joint 21 is coated on its inner back with the skirt section 221 of outer tube joint 22 and is pressed into one by operated pressing tool, in addition, the skirt section 211,221 of inner pipe joint 21 and outer tube joint 22 also can be fixed together by the Placement of welding.At this moment, leave certain clearance 4 between the tube wall 222 of the tube wall 212 of inner pipe joint 21 and outer tube joint 22, this gap 4 is a bit larger tham the pipe thickness of inserting the plastic tube 3 between the inner and

outer pipe joint

21,22.

As shown in Figure 1, in using the utility model during the link of plastic tube, the fastening piece 1 that at first will be provided with internal thread 11 is through on the plastic tube 3, then after the coating layer of adhesive this plastic tube 3 is inserted on the inside and outside wall of plastic tube 3 ports in the pipe joint 2 in the gap between the inner and

outer pipe joint

21 and 22 4.Subsequently, adopt special tool that outer tube joint 22 is pushed down, and adopt special tool that inner pipe joint 21 is carried out the tube wall expansion, make inner and

outer pipe joint

21 and 22 be pressed on the inside and outside wall of plastic tube 3.At last, fastening piece 1 is pushed away on pipe joint 2, and put into a rubber cushion 5, thereby utilize the internal thread 11 on fastening piece 1 inwall to be communicated with other pipelines 6 in the inside of fastening piece 1.

Pipe connecting member of plastics material during this practicality is new makes the inner pipe joint 21 and the gap of plastic tube 3 inwalls be disengaged owing to adopt the mode that expands in the external pressure closely to contact with the inside and outside wall of plastic tube 3, thereby eradicates the seepage phenomenon of link.In addition and since inner pipe joint 21 after expansion with the inwall size basically identical of plastic tube, thereby can not influence the flowing velocity of liquid in pipe.

Claims

1. the link of a plastic tube, mainly constitute by a fastening piece (1) and a pipe joint (2), it is characterized in that: described pipe joint (2) is made of an inner pipe joint (21) and an outer tube joint (22), wherein inner pipe joint (21) and outer tube joint (22) all are extended with skirt section (211,221) at an end separately, and this two skirt section (211,221) stack together mutually, and leave certain clearance (4) between two tube walls (212,222) of inner and outer pipe joint (21,22); Described fastening piece (1) is provided with a bulge loop (12) at the one end, and portion is provided with the internal thread (11) that can be connected with other pipelines (6) within it.

2. according to the link described in the claim 1, it is characterized in that: the skirt section (211) of described inner pipe joint (21) is coated on its inside with the skirt section (221) of outer tube joint (22).

3. according to the link described in the claim 1, it is characterized in that: described inner pipe joint (21) and outer tube joint (22) are fixed and welded together in stacked skirt section (211,221) mutually.

4. according to the link described in the claim 1, it is characterized in that: be provided with a seal washer (5) in described fastening piece (1) inside.