CN201428894Y

CN201428894Y - Thermoplastic plastic pipe fitting

Info

Publication number: CN201428894Y
Application number: CN2009200733609U
Authority: CN
Inventors: 蔡台生
Original assignee: Shanghai Yaowei Plastic & Rubber Co Ltd
Current assignee: Shanghai Yaowei Plastic & Rubber Co Ltd
Priority date: 2009-06-04
Filing date: 2009-06-04
Publication date: 2010-03-24
Anticipated expiration: 2019-06-04

Abstract

The utility model discloses a thermoplastic plastic pipe fitting which comprises a pipe fitting body and at least an inserting pipe. A step is annularly arranged on the wall of the inserting pipe to form a small-diameter part and a large-diameter part; external threads are arranged on the outer wall of the small-diameter part; internal threads are arranged on a hole wall at the opposite end of theinner hole of the pipe fitting body and the inserting pipe; and the small-diameter part is inserted in the inner hole of the pipe fitting body and is in threaded connection with the pipe fitting body. The large pipe fitting is divided into a plurality of manually assembled parts, thereby saving the manufacturing cost of moulds and the purchase cost of large-scale transmitters. Compared with the prior art, the finished pipe fitting with larger dimension can be manufactured by adopting the moulds with identical numbers and the transmitter with identical models.

Description

The big pipe fitting of thermoplastic

Technical field

The utility model relates to the structure of the pipes consisting of thermoplastic plastics of tube outer diameter more than DN250.

Background technique

For the pipes consisting of thermoplastic plastics of tube outer diameter more than DN250 (implication of DN is a nominal) reaches,, mainly contain punching block injection moulding once-through and two kinds of modes of production of welding assembly unit such as positive threeway, reducing tee, 90 ° of elbows, 45 ° of elbows and straight tube spares.

Punching block injection moulding once-through is applicable to that usually tube outer diameter is the pipes consisting of thermoplastic plastics of DN250 and DN350, for tube outer diameter is pipes consisting of thermoplastic plastics more than the DN400, because the too high and anti-accumulated temperature problem of raw material of expense of mould, equipment, people adopt the mode of production of welding assembly unit usually, promptly earlier tubing is cut into required part, then with the part of each coupling with weld earlier with the material welding rod solid after, integral body envelopes (increase crushing resistance) layer by layer with FRP again.Fig. 1 a, 1b and 1c show 45 ° of elbows, threeway and the 90 ° of elbows that adopt this mode of production to produce respectively, and as can be seen from the figure splicing welding joint 9.Can exempt the expense of making punching block and buying large-scale injector though adopt the mode of production of welding assembly unit, but but has following shortcoming: 1. because consume too much artificial, process time is long, adds the FRP Master Cost, so it is not low to finish the whole cost of product; 2. finished product structure insecure (face of weld is too little) adds that thermoplastic and FRP are unlike material, and the thermal expansion coefficient difference so this series products only can be used for low pressure and worst cold case, can't reach the high pressure requirement; 3. because of using the FRP cladding process, so the dust pollution that has solvent contamination and polishing to produce in the production process; 4. because of coating multilayer FRP,, packing and cost of transportation have been increased so the product weight of finishing is very heavy.

Summary of the invention

Technical problem to be solved in the utility model is to provide a kind of thermoplastic big pipe fitting, and this big pipe fitting is made from multiple components, and is convenient to assembling.

The technological scheme that the utility model adopted is: the big pipe fitting of a kind of thermoplastic, this pipe fitting comprise pipe fitting body and at least one intubate; Be equipped with a step on the tube wall of intubate, form a minor diameter part and a large-diameter portion; Be provided with outside thread on the outer wall of minor diameter part, the hole wall of the endoporus of pipe fitting body and intubate opposite end is provided with internal thread, and minor diameter part is inserted in the endoporus of pipe fitting body, is threaded with the pipe fitting body.

The big pipe fitting of above-mentioned thermoplastic wherein, is laid with glue on outside thread and internal thread.

The big pipe fitting of above-mentioned thermoplastic wherein, is equipped with step on the hole wall of the endoporus of intubate.

The utility model has the advantages that:

1. big pipe fitting is divided into several assembled components mutually, the purchase cost of having saved die manufacturing cost and large-scale injector;

2. compared with prior art, adopt the mould of equal number and the injector of same model can produce larger sized pipe fitting finished product;

3. be connected by the mechanical bond power of screw thread and the Adhesion force of chemical glue simultaneously between pipe fitting body and the intubate, can make pipe fitting body and intubate strong bonded, and avoid revealing;

4. only need change the internal diameter of intubate, can realize the conversion of GB specification, U.S. mark specification and day mark specification, can save die cost greatly;

5. pipe fitting body of the present utility model has adopted identical material with intubate, and thermal expansion coefficient is identical, and is by the high pressure moulding, can satisfy the requirement that technical grade is high pressure resistant and the heatproof difference changes.

Description of drawings

Fig. 1 a, 1b and 1c are respectively the structural representations that adopts 45 ° of elbows, threeway and 90 ° of elbows of the production of welding erection method;

The decomposing schematic representation of Fig. 2 first kind of mode of execution of the present utility model;

Fig. 3 is the decomposing schematic representation of second kind of mode of execution of the present utility model;

Fig. 4 is the decomposing schematic representation of the third mode of execution of the present utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is made and to be further specified.

Fig. 2 shows first kind of mode of execution of the present utility model.In this embodiment, the big pipe fitting of this thermoplastic is a tee pipe fitting, comprises pipe fitting body 1 and three intubate 2.Be equipped with a step 20 on the tube wall of intubate 2, form a minor diameter part 21 and a large-diameter portion 22.Be provided with outside thread 211 on the outer wall of minor diameter part 21, the endoporus 11 of pipe fitting body 1 is provided with internal thread 111 with the hole wall of these intubate 2 opposite ends, and minor diameter part 21 is inserted in the endoporus 11 of pipe fitting body 1, is threaded with pipe fitting body 1.Preferably, internal thread 111 and outer spiral shell position 211 are coarse thread, have stronger mechanical bond power and can not get loose with assurance pipe fitting body 1 and intubate 2.In order to ensure the sealing of pipe fitting finished product, on outside thread 211 and internal thread 111, also be laid with glue, these glue that fill up thread make the pipe fitting body combine closelyr with intubate.

As shown in the figure, be equipped with a step 250 on the hole wall of the endoporus of intubate 2, this step 250 is separated into hole, big footpath 251 and path hole 252 with the endoporus of intubate 2.Only need to change the aperture size in hole 251, big footpath, the utility model can be realized the conversion of GB specification, U.S. mark specification and day mark specification easily, has saved die cost greatly.

Fig. 2 and Fig. 3 show second kind of mode of execution of the present utility model and the third mode of execution respectively.In second kind of mode of execution, the big pipe fitting of this thermoplastic is one 90 ° of bend pipe tools, and in the third mode of execution, the big pipe fitting of thermoplastic is one 45 ° of bend pipe tools.In Fig. 2 and mode of execution illustrated in fig. 3, the big pipe fitting of thermoplastic comprises a pipe fitting body 1 and two intubate 2, and the structure of this pipe fitting body 1 and intubate 2 is similar to first kind of mode of execution, does not repeat them here.

Though description of the present utility model combines certain embodiments, but it should be understood by one skilled in the art that the utility model is not limited to embodiment described here, and can carry out various modifications and variations and do not deviate from spirit and scope of the present utility model.

Claims

1. the big pipe fitting of thermoplastic is characterized in that, described pipe fitting comprises pipe fitting body and at least one intubate; Be equipped with a step on the tube wall of described intubate, form a minor diameter part and a large-diameter portion; Be provided with outside thread on the outer wall of described minor diameter part, the hole wall of the endoporus of described pipe fitting body and intubate opposite end is provided with internal thread, and described minor diameter part is inserted in the endoporus of pipe fitting body, is threaded with the pipe fitting body.

2. the big pipe fitting of thermoplastic as claimed in claim 1 is characterized in that, is laid with glue on described outside thread and described internal thread.

3. the big pipe fitting of thermoplastic as claimed in claim 1 is characterized in that, is equipped with step on the hole wall of the endoporus of described intubate.

4. the big pipe fitting of thermoplastic as claimed in claim 1 is characterized in that described pipe fitting is a tee pipe fitting, comprises a pipe fitting body and three intubate.

5. the big pipe fitting of thermoplastic as claimed in claim 1 is characterized in that described pipe fitting is a bend pipe tools, comprises a pipe fitting body and two intubate being located at these pipe fitting body both sides.