CN201066015Y

CN201066015Y - Socket hot-melting confining type steel-plastic pipe conversion joint

Info

Publication number: CN201066015Y
Application number: CNU2007201249214U
Authority: CN
Inventors: 周伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-08-03
Filing date: 2007-08-03
Publication date: 2008-05-28
Anticipated expiration: 2017-08-03

Abstract

The utility model relates to a pipe connector used for connecting between pipes in a underground pipe network of fuel gas, tap water and industrial gas, in particular to a socket heat-melting tightening type steel-plastic pipeline changeover connector used for connecting between an underground steel pipe and an underground PE pipe, which comprises a seamless steel pipe, a buried PE pipe and a PE thermal shrinkable sleeve, wherein, pipe taper threads is arranged at one end of the seamless steel pipe; one end of the buried PE pipe is tightly interference-fitted with the pipe taper thread of the seamless steel pipe and the inner surface is matched with the pipe taper thread grooves. The utility model is characterized in that on the interference fit section of the pipe taper threads of the seamless steel pipe and the buried PE pipe, a tightly locking steel ring is sleeved on the exterior surface of the buried PE pipe, and the PE thermal shrinkable sleeve is sleeved on the seamless steel pipe and the tightly locking steel ring of the interference fit section. The utility model has the advantages of high pressure resistant intensity, reliable connecting seal, no leakage, safety and reliability, strong anticorrosion performance, simple manufacturing procedure, reduced production cost, convenient on-site assembly, long service life and suitability for mass production in the factory.

Description

Socket joint hot melt hooped type Steel-plastic pipeline crossover sub

One, technical field

The utility model relates to the pipe joint that connects between pipe in a kind of combustion gas, tap water, the industrial gas underground pipe network, the Steel-plastic pipeline crossover sub that is connected between particularly underground steel pipe and underground PE pipe.

Two, background technique

In urban Underground pipeline, the underground pipe network of industry-by-industry and ground pipe network, most steel pipes and cast iron tubes of adopting, because steel pipe and cast iron tube price are higher, tubing is heavier relatively, its outer coating antiseptic that needs again, not only the management operating maintenance cost is higher, and lacks (generally at 25-35) service life.Therefore in various underground pipe networks, a kind of corrosion-inhibiting coating that do not need, density is little, installs simple and easyly, and PE manages (buried polyethylene pipe) and is used with grow burying of (more than 50 years) service life.Therefore but manage not ultraviolet radiation preventing owing to bury ground PE, bury ground PE pipe network and go out before the ground or need the Steel-plastic pipeline crossover sub when in underground pipe network, being connected with steel pipe.The Steel-plastic pipeline crossover sub that adopts is made of steel pipe, PE pipe, fixed steelring at present, the PE pipe exerted pressure by press be pressed in the steel pipe of band cover tooth pipe, again fixed steelring is enclosed within on the PE pipe of joint, cause the joint PE tube wall of this crossover sub thin, withstand voltage poor, safety reliability is low, fixed steelring easy-to-rust, antiseptic property are poor, need carry out preservative treatment, manufacturing procedure is many, the cost of production height.Another Steel-plastic pipeline crossover sub, adopt the seamless steel pipe of band pipe tapered thread to insert interference fit in the PE pipe, and the pipe tapered thread groove of the internal surface of PE pipe and seamless steel pipe is chimeric, its outer sheathed PE heat-shrink tube, although its antiseptic property is better, manufacturing procedure is simple, cost of production is low, but this crossover sub is in installation, using process, as be subjected to external force collision, extruding or people for shake, when trampling, the chimeric position of steel pipe and PE pipe will sustain damage, it is bad to make it connect sealing, easily cause gas, water to leak, withstand voltage poor, safety reliability is low.

Three, summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of socket joint hot melt hooped type Steel-plastic pipeline crossover sub, this crossover sub compressive strength height, it is reliable to connect sealing, and antiseptic property is strong, and is safe in utilization, manufacturing procedure is simple, cost of production is low, long service life.

The utility model adopts such technological scheme: a kind of socket joint hot melt hooped type Steel-plastic pipeline crossover sub, include an end be provided with the pipe tapered thread end interference fit of seamless steel pipe, an end and seamless steel pipe of pipe tapered thread and internal surface and pipe tapered thread groove chimeric bury PE manage, the PE thermal shrinkable sleeve, it is characterized in that the pipe tapered thread of aforesaid seamless steel pipe with bury on the ground PE pipe interference fit section, the outer surface that buries ground PE pipe is arranged with the lock ring steel ring, aforesaid PE thermal shrinkable sleeve be sheathed on this interference fit section seamless steel pipe, bury on ground PE pipe and the lock ring steel ring.

The socket joint hot melt hooped type Steel-plastic pipeline crossover sub that provides by the utility model, for steel is moulded linkage structure, its two ends during use (seamless steel pipe and the underground the other end that buries ground PE pipe), respectively with underground pipe network in the seamless steel pipe welding and adopt the special-purpose Placement of PE pipe and PE in the underground pipe network to manage to be connected.Because the seamless steel pipe in this crossover sub and the joint of underground gas PE pipe are interference fit, the internal surface that buries ground PE pipe of joint and the pipe tapered thread groove of seamless steel pipe are chimeric, the outer surface that buries ground PE pipe in its two interference fit portion is arranged with the lock ring steel ring, realize the integral sealing of two kinds of interface tube sections, and be arranged with the PE thermal shrinkable sleeve outside the joint, for the full corrosion-resistant steel of mechanism is moulded crossover sub, can prevent effectively that the joint is corroded and the coming off of unexpected leakage that causes and joint, so the utility model compressive strength height, connect sealing and reliably can not produce leakage, safe and reliable, antiseptic property is strong, and manufacturing procedure is simple, can reduce production costs, and is suitable for factory and produces in batches, on-the-spot easy for installation, be working life more than 30 years, and freedom from repairs, be used in the gas of 0.4Mpa (containing 0.4Mpa) with downforce, tap water, industrial gas (nitrogen, oxygen, chlorine, ammonia and other inert gas) steel pipe in the line transportation and the transition and conversion of PE pipe.

Four, description of drawings

Accompanying drawing is a structural representation of the present utility model.

Among the figure: 1-buries ground PE pipe 2-PE thermal shrinkable sleeve 3-lock ring steel ring 4-seamless steel pipe

Five, embodiment

Embodiment of the present utility model is described with reference to the accompanying drawings.As shown in drawings,: a kind of socket joint hot melt hooped type Steel-plastic pipeline crossover sub, include an end be provided with the pipe tapered thread end interference fit of seamless steel pipe 4, an end and seamless steel pipe 4 of pipe tapered thread and internal surface and pipe tapered thread groove chimeric bury PE manage 1, PE thermal shrinkable sleeve 2, the pipe tapered thread of aforesaid seamless steel pipe 4 with bury ground PE and manage on the 1 interference fit section, the outer surface that buries ground PE pipe 1 is arranged with lock ring steel ring 3, aforesaid PE thermal shrinkable sleeve 2 be sheathed on this interference fit section seamless steel pipe 4, bury on ground PE pipe 1 and the lock ring steel ring 3.Seamless steel pipe 4 is one section pipeline section that specification is φ 76 * 4, the preprocessing of one end has the pipe tapered thread of one section certain-length, burying ground PE pipe 1 is one section pipeline section that specification is φ 90 * 8.2, the pipe tapered thread end of seamless steel pipe 4 is imported in the end that buries ground PE pipe 1, with the interference fit section of burying ground PE pipe 1 maintenance 90 millimeters long, steel pipe with heating plant heating interference fit section, its temperature is risen in the energy fusion interference fit section stop heating after the poly temperature of PE pipe internal surface, the polyethylene that the interference fit section internal surface that buries ground PE pipe 1 is molten will be filled the pipe tapered thread groove of seamless steel pipe 4 automatically, make two pipe contact surfaces chimeric fully, realize the once sealing of steel-plastic joint.After treating interference fit section natural cooling, with a Φ 94 * 1.5, length is that the steel pipe socket of 50mm is on the PE of interference fit section pipe, with cold hobbing equipment the steel pipe extruding is the fastening lock ring steel ring 3 that buries ground PE pipe 1 and seamless steel pipe 4 again, realize the secondary seal between its two pipe, at last sheathed PE thermal shrinkable sleeve 2 outside seamless steel pipe 4 and the joint of burying ground PE pipe 1.

Claims

1. socket joint hot melt hooped type Steel-plastic pipeline crossover sub, include the seamless steel pipe (4) that an end is provided with the pipe tapered thread, the ground PE that buries that the pipe tapered thread end interference fit of one end and seamless steel pipe (4) and internal surface and pipe tapered thread groove are chimeric manages (1), PE thermal shrinkable sleeve (2), it is characterized in that the pipe tapered thread of aforesaid seamless steel pipe (4) with bury on ground PE pipe (1) interference fit section, the outer surface that buries ground PE pipe (1) is arranged with lock ring steel ring (3), and aforesaid PE thermal shrinkable sleeve (2) is sheathed on the seamless steel pipe (4) of this interference fit section, bury on ground PE pipe (1) and the lock ring steel ring (3).