CN2313138Y

CN2313138Y - Right angle steel-plastic adapter

Info

Publication number: CN2313138Y
Application number: CN 97228978
Authority: CN
Inventors: 朱昭林; 徐宏安
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-10-28
Filing date: 1997-10-28
Publication date: 1999-04-07
Anticipated expiration: 2007-10-28

Abstract

The utility model provides an improved design proposal of a steel-plastic transition pipe joint in a pipeline system. The steel-plastic transition pipe joint with a right angle is characterized in that the steel-plastic transition pipe joint is formed in the way that a plastic pipe and a steel bend with a right angle are statically matched and connected into a whole, wherein the jointing part of the static match is provided with a sealing ring and an inner expanding pipe is connected in the inner diameter of the plastic pipe at the jointing part in a static match way. The problem that the transition jointing part of pipe joints jointed by threads is broken by the radial force can be solved by the utility model. In addition, the utility model can reduce the amount of welded junctions and decrease the welding difficulty during the weld jointing process.

Description

90 ° of steel---mould the transition tube joint

The utility model relates to the pipe-line system steel---and mould the improvement design of transition tube joint, particularly provide a kind of being applicable to bury the pipe joint that combustion gas plastic pipe in ground uses.

Advantages such as plastic tube is corrosion-resistant with it, life-span length, easy construction have been widely used in the gas transmission and distribution system, because plastic tube is inflammable, easily be mechanically damaged, therefore, plastic tube is used for burying the ground part more, burying the ground plastic tube when being connected, just relating to steel with the ground steel pipe---mould the transition connectivity problem between the pipe.Steel in the known technology---plastic pipe union generally is that straight shape steel tube forms with straight plastic pipe disjunctor, easy construction during application, but when the threaded connection place is subjected to the footpath outward force, or because stratum inequality and sedimentation when producing radial force, make pipeline produce bending deflection, cause the joint to be damaged, cause gas leakage, so clearly forbid this type of steel---plastic pipe union in some regional job specfications.The employing welding steel is also arranged in the known technology---plastic pipe union, though with can avoid being threaded the above-mentioned defective of pipe joint, but the weld bond of this kind joint is many, underground welding difficulty is bigger, particularly the welding difficulty of substantially horizontal is bigger, welding quality is difficult to guarantee, thereby causes difficulty to construction.The inventor thinks: above-mentioned steel---plastic pipe union exists the reason of defective to be steel---and mould two pipe joints and be between straight tube and connect.

The utility model purpose is to provide a kind of 90 ° of steel---mould the transition tube joint, to overcome the defective of above-mentioned known technology pipe joint.

Achieve the above object and adopt technological scheme to be: this 90 ° of steel---mould the transition tube joint, it is characterized in that: this pipe joint is to be that one constitutes by plastic tube and 90 ° of steel bend pipe stationary fit loads, its stationary fit joint is provided with seal ring, and also stationary fit is fitted with interior expand tube in the internal diameter of connection part plastic tube.

The pipe joint of making of technique scheme that combustion gas plastic pipe in ground uses that buries has following advantage: thereby adopted original steel because of it---mould that the steel end increases by 90 ° of angles and is connected the technological means that forms pipe joint with straight plastic pipe in the transition tube joint, so this pipe joint promptly is applicable in pipe applications and is threaded, also be applicable to welding, can change the force direction that is subjected to of original threaded connection place when being threaded, thereby avoid joint bending deflection, guarantee the safety reliability of threaded connection place; When adopting welding manner, can reduce weld bond quantity, reduce the welding difficulty, improve soldering reliability.

Fig. 1 is these 90 ° of steel---mould the organigram of transition tube joint.

Fig. 2 is a transition tube joint application state schematic representation shown in Figure 1.

The embodiment who provides below in conjunction with accompanying drawing further describes.Referring to Fig. 1, this transition tube joint one end is 90 ° of steel bend pipes (1), the other end is a straight plastic pipe (2), both stationary fit loads are one, its fitting surface is provided with seal ring (3), have interior expand tube (4) in its straight plastic pipe (2) connecting end body, its load technology is: 1. earlier with plastic tube (2) heating, after the pressurization interior expand tube (4) is embedded within the plastic tube (2); 2. in 90 ° of steel bend pipes (1), add seal ring (3), and will insert in it with the plastic tube (2) of interior expand tube; 3. heating is pushed into desired location with interior expand tube (4) and makes two ends stationary fit load be formed as one this 90 ° of steel on hydraulic press---mould the transition tube joint.This pipe joint can be 90 ° of steel of φ 32mm as nominal diameter according to on-the-spot needs all size or model---mould the transition tube joint, steel is made end, and can to adopt external diameter be No. 20 cold drawing seamless pipes of φ 34mm; Moulding system end, can to adopt external diameter be the combustion gas buried polyethylene pipe of φ 32mm; It is φ 20mmA that interior expand tube adopts diameter ₃F gas pipe material.Seal ring adopts commercially available combustion gas to get final product with the sealing material product.

This 90 ° of steel---mould transition tube joint user mode as shown in Figure 2, its straight plastic pipe (2) but ground combustion gas plastic tube (5), its steel end weldable steel tubulation road (6) are buried in end screw thread or welding.

Claims

1, a kind of 90 ° of steel---mould the transition tube joint, it is characterized in that: this pipe joint is to be that one constitutes by plastic tube and 90 ° of steel bend pipe stationary fit loads, its stationary fit joint is provided with seal ring, and also stationary fit is fitted with interior expand tube in the internal diameter of connection part plastic tube.