WO2005015072A1

WO2005015072A1 - A connecting member of pipeline

Info

Publication number: WO2005015072A1
Application number: PCT/CN2003/000654
Authority: WO
Inventors: Wei Qi
Original assignee: Wei Qi
Priority date: 2003-08-11
Filing date: 2003-08-11
Publication date: 2005-02-17
Also published as: AU2003255109A1

Abstract

The utility model relates to a connecting member of pipeline, including pipe principal part, an open section stretched out from the pipe principal part side walls and the open section being truncated cones; and a side pipe which is evase covers the periphery of the open section, the side wall of the open section contacting with the innerwall of the underpart of the side pipe. The connecting member of pipeline given in the utility model could enlarge the connected area between the open section which is truncated cones and the side pipe to the largest extend. The largest contacting area would ensure the stickup fastness and sealed fastness when connecting the above two parts with plastic glue or hot melt. The first step of the seal and fastness is completed by stickup with plastic glue or hot melt according to the plastic materials characteristic of the two parts at artifactitious processing. Drilling hole and the structures of bolt and screw would enhance the mechanical intensity of the combined parts. At the same time, connecting the open section of the pipe principal part with the side pipe by melt on the position connecting each other to further strength the binding intensity and airtight quality between them.

Description

TECHNICAL FIELD

The utility model relates to a pipe connecting piece, in particular to a pipe connecting piece made of plastic material. Background technique

At present, the caliber of all kinds of plastic materials can be very large, but for large-caliber pipe connections such as tees and crosses, it is impossible to open the steel or aluminum mold first and then pass the injection machine. The main reasons for processing and molding are: There are many types of large-size tee and four-way parts, and the injection mold opening cost of large-size parts is too high. The investment in the machine and supporting costs of the large-capacity injection machine is too large, plus some plastics. The material itself is not resistant to high-temperature baking for a long time, so traditional large-size tees, crosses and other pipe connections of various specifications are processed by hand, that is, the central part of the main body of the pipe made of plastic pipe is sawed first. A V-shaped notch. At the same time, the bottom of the side pipe made of plastic pipe is also sawed with a V-shaped protrusion of the same size as the V-shaped opening of the main body of the pipe. Then, the two V-shaped seams are welded with a welding electrode of the same material. After welding, use glass fiber sheet plus special resin (FRP) to cover the above-mentioned V-shaped mouth and surrounding area. The traditional hand-made large-size three-way and four-way pipe connecting parts have the following disadvantages: The joint area of the body and the side pipe is too small, so the bonding force is not strong enough, the tensile and compression resistance are weak, and the sealing effect is not good. good. In addition, the thermal expansion coefficient of the FRP material is different from that of the plastic material of the main body of the pipe and the side pipe. Therefore, under long-term accumulated temperature conditions, the FRP materials will be separated from each other. At the same time, the FRP coating appearance is very unsightly. Based on the above facts, traditional hand-worked large-sized plastic piping connection tees and crosses can only be used for low pressure and low temperature piping systems.

A European patent (application number: 88200084. 7) filed on January 19, 1988, entitled "pipe connection, especially drainage pipe", this application discloses the structure of a three-way pipe connection, which is A small-sized ring-shaped convex collar turned outward at a right angle of 90 ° is made on the main body of the pipe made of the pipe. Then, a parallel groove is formed on the collar and an expansion is installed to clamp the inserted side pipe. This structure has the following shortcomings: The 90 ° right angle itself has weak compression resistance. In addition, the connecting area between the protruding collar and the side pipe of the main body of the pipe is too small, and it is only connected by the expansion, and it is connected with the traditional rubber. The looper connection method is similar, and the binding force and sealing effect are not good, so they can only be used in pressureless drainage pipeline systems. However, it cannot adapt to the occasions with large fluid pressure, even high temperature, high pressure, and high sealing requirements. Summary of the invention

The purpose of the utility model is to propose a pipe fitting connecting piece with improved structure, in order to solve the above technical problems and cost problems of high temperature, high pressure, high sealing requirements and high mold cost. With this practical new structure, the pipe fittings that can be applied to "high temperature, high pressure, and high sealing requirements" can be produced with the simplest mold cost, and its safety factor is almost the same as that of the pipe. In addition, as long as there are pipes, tees and crosses of various calibers can be produced. Therefore, the emergence of this new product will definitely expand the application field and economic benefits of large-caliber plastic pipe systems in the industrial market.

In order to achieve the above object, the technical solution adopted by the present utility model is as follows. A pipe connecting piece is characterized by comprising: a pipe main body, an opening portion protruding outward is formed on a side wall of the pipe main body, and the opening portion is convex Cone-shaped

The side tube has an inverted bell mouth shape, and is sleeved around the periphery of the opening portion, and an outer wall of the opening portion is in contact with a lower inner wall of the side tube. BRIEF DESCRIPTION OF THE DRAWINGS

In the following, referring to the drawings, for those skilled in the art, the above and other objects, features and advantages of the present invention will be apparent from the detailed description of the present invention.

FIG. 1 is a sectional structural view of a first preferred embodiment of the present invention;

2 is a sectional structural view of a second preferred embodiment of the present invention;

FIG. 3 is a sectional structural view of a third preferred embodiment of the present invention. detailed description

Referring to FIG. 1, the three-way pipe connecting member of this embodiment generally includes a pipe main body 11 and a side pipe 13. An opening 12 is formed on one side of the pipe main body 11, and the opening 12 has a convex cone shape extending slightly outward. A side tube 13 is sleeved on the outside of the opening portion 12, the outer wall of the opening portion 12 is in contact with the lower inner wall of the side tube 13, and the two are firmly bonded with plastic glue 14 in this contact area, and bonded here Area The proper position of the field is to drill some holes 15 from the outside of the side pipe 13 toward the opening 12, and then insert plastic bolts or screws 16 into the holes 15 to strengthen the side pipe 13 and the opening 12 and the main body of the pipe. 11 the firmness of the bond. In addition, the upper annular region 17 and the lower annular region 18 of the joint portion of the opening 12 and the side pipe 13 can be re-welded with the electrode of the same material as the pipe main body 11 and the side pipe 13 to increase the mutual relationship between the opening 12 and the side pipe 13 The bonding strength and sealing effect. In the embodiment, the pipe body 11, the side pipe 13, and the screw 16 are made of plastic materials such as: PVC, CPVC :, ABS, and the like. The plastic glue of the present utility model can use 724, 729 glues produced by the American IPS company, and glues of models 31131, 31083, 31037 produced by the OATEY company.

The structure of the three-way pipe connecting piece in FIG. 2 is similar to that in FIG. 1. An opening 22 is formed on the side of the pipe body 21. The opening 22 has a convex cone shape extending slightly outward. A sleeve is provided on the outside of the opening 22. The side tube 23 and the outer wall of the opening 22 are in contact with the inner wall of the lower portion of the side tube 23, and the two are firmly bonded by means of thermal welding 24 in the contact area, and the position of the side tube 23 The outside is drilled in the direction of the opening 22 with holes 25 of appropriate depth and diameter. Then, the hole 25 is filled with a molten plastic body 26 of the same material to enhance the firmness of the side pipe 23 and the opening 22 and the pipe body 21. In addition, the upper annular region 27 and the lower annular region 28 of the joint portion of the opening 22 and the side pipe 23 can be re-welded with the electrode of the same material as the pipe main body 21 and the side pipe 23 to increase the mutual relationship between the opening 22 and the side pipe 23 The bonding strength and sealing effect. The pipe body 21, the side pipe 23 and the plastic body 26 in this embodiment are made of plastic materials such as PE, PP, PPH, PVDF, PFA, FEP, etc.

The embodiment of FIG. 3 is a four-way pipe connecting piece. A vertically symmetrical and penetrating opening portion 32 (only one is shown) is formed on the pipe main body 31. The opening portion 32 has a cone shape protruding outward. A side tube 33 is sleeved on the outer side of the body, and the manner in which the side tube 33 is combined with the opening portion 32 may be in any of the two embodiments described above.

By adopting the above-mentioned pipe connecting piece, the large rounded corner structure of the opening can save most of the "mould costs", and can also maintain "the strength of the pipe structure unchanged", meanwhile, the crater-shaped cone and the side pipe can be saved. The area of mutual bonding has been increased to the maximum limit, so that when the two parts are welded with plastic glue or heat welding, there will be a maximum contact area to ensure the firmness of the bonding and the reliability of the seal. During processing, it is adopted according to the characteristics of the plastic materials of the two parts. Plastic special glue or hot-melt welding "to complete the first seal and firm. The structure of drilling holes and bolts or screws increases the mechanical strength of the two parts, and The opening of the opening and the joint portion of the side pipe are welded to further increase the mutual binding force and tightness of the main body of the pipe and the side pipe.

The above embodiments are only for the purpose of illustrating the present utility model, but not for limiting the present utility model. Those skilled in the relevant technical field may make various changes or changes without departing from the spirit and scope of the present utility model. Therefore, all equivalent technical solutions should also belong to the scope of the present invention and should be defined by the claims.

Claims

Rights request

1. A pipe connecting piece, comprising:

A main body of the pipe part, an opening part protruding outward is formed on a side wall of the main body of the pipe part, and the opening part has a convex truncated cone shape;

The side tube has an inverted bell mouth shape, and is sleeved around the periphery of the opening portion, and an outer wall of the opening portion is in contact with a lower inner wall of the side tube.

2. The pipe connecting piece according to claim 1, wherein:

A hole is opened in the contact area between the opening of the pipe body and the side pipe, and the hole is filled with plastic glue, and a connection fastener is placed.

3. The pipe connecting piece according to claim 1, wherein:

A hole is opened in the contact area between the opening of the pipe body and the side pipe, and the hole is filled with a molten plastic body.

4. The pipe connecting piece according to claim 2, wherein a contact area between the side pipe and the opening is firmly adhered with plastic glue.

5. The pipe connecting piece according to claim 3, wherein a contact area between the side pipe and the opening is fastened by thermal fusion welding.

6. The pipe connecting piece according to claim 4 or 5, characterized in that:

The upper annular area and the lower annular area of the joint portion between the opening and the side pipe are welded with an electrode made of the same material as the pipe body and the side pipe.

7. The pipe connecting piece according to claim 6, wherein the opening portion has at least

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