CN2753940Y

CN2753940Y - Threaded pipeline connecting piece with embedded seal ring inner-wall enamel

Info

Publication number: CN2753940Y
Application number: CN 200420034723
Authority: CN
Inventors: 张翔
Original assignee: Individual
Current assignee: Wang Shen
Priority date: 2004-05-12
Filing date: 2004-05-12
Publication date: 2006-01-25
Anticipated expiration: 2014-05-12

Abstract

The utility model relates to a thread connecting type pipeline connecting piece with inward embedded seal ring inner wall enamel, which belongs to a component used for pipeline connection. The inner wall of the connecting piece is provided with pipe threads, an enamel layer is coated on the inner surface of the connecting piece and an annular lug boss is arranged on the inner surface. A groove which is used for embedding a rubber seal ring is respectively arranged closely near both sides of the lug boss, and both side faces of the annular lug boss are respectively extended to the bottom faces of the grooves downwards in an inward inclining way. The water flowing section of a pipe piece is not changed, and the utility model makes a connected pipeline system have good seal and corrosion prevention functions.

Description

A kind of threaded connecting pipeline connecting parts with embedded seal ring inwall enamel

One, technical field

The utility model relates to a kind of pipeline connecting parts, especially a kind of threaded connecting pipeline connecting parts with embedded seal ring inwall enamel.

Two, background technique

Present known threaded connecting pipeline connecting parts (as malleable cast iron pipeline link) by the pipe thread that processes, can be realized the reliable connection and the sealing of pipe-line system on metal pipe and tubing.But because metal pipe element inwall easy-to-rust, can cause secondary pollution to the fluid of its conveying, so when itself and the supporting use of novel environment friendly tubing such as line plastic-steel tube or plastic-coated steel, must serve as a contrast its inwall and mould or preservative treatment such as plastic-coated, to solve its inwall corrosion problem.But only its inwall is carried out the pipe fitting that plastic-coated is handled, do not have contacting of the line plastic-steel tube of coating for protection against corrosion end face or plastic-coated steel end face and conveyance fluid, thereby its corrosion protection, antipollution measure are incomplete owing to can't completely cut off.And a kind of to be called as ditch seam formula lining plastic pipe be by when wall liner is moulded in metal pipe element, in pipe fitting, process a plastics tongue pipe, form a ditch seam between this tongue tube and tube spare internal thread, in the ditch seam, place a rubber seal then, when tubing and pipe fitting when being threaded, rubber seal in the tube end face compression ditch seam, thus tube end face contact with fluid with pipe fitting inner wall and realize sealing and the purpose of anti-corrosion.But there are three open defects in the lining plastic pipe of this structure: (one) influences flow because of the existence meeting of tongue pipe obviously reduces the water flowing sectional area of pipe fitting; (2) when the delivering hot water,, original structure is destroyed and lost efficacy because of the easy temperature distortion of plastics tongue pipe; (3) because the contraction deformation of pipe fitting plastic lining easily forms the interlayer slit between plastic lining and the outer layer pipe, if rubber seal is not fully compressed when pipeline is installed, fluid can infiltrate the interlayer slit so, thereby causes the pipe fitting inner wall corrosion.In order to address the aforementioned drawbacks, a kind of shoulder type lining plastic pipe has appearred again in recent years.This pipe fitting is when the pipe fitting inner wall lining is moulded, and processes a plastics step in pipe fitting, places rubber seal then on the plastics step, falls in the pipeline for preventing rubber seal, is enclosed with metal collar in rubber seal.When tubing and pipe fitting when being threaded, the rubber Mi Quan that places on the tube end face compression step, thus tube end face contact with fluid with the pipe fitting inwall and realize sealing and the purpose of anti-corrosion.The lining plastic pipe of this structure can better overcome above-mentioned (one), (two) defective, but above-mentioned (three) defective is had the trend of extension.

Three, model utility content

The purpose of this utility model is to provide a kind of threaded connecting pipeline connecting parts with embedded seal ring inwall enamel of simple in structure, with low cost and anti-corrosion Perfect in shape and function.The utility model is achieved in that a kind of threaded connecting pipeline connecting parts with embedded seal ring inwall enamel, comprise that inwall has the metal tubes link of pipe thread, topped on the described link internal surface have an enamel layer, and internal surface is provided with an annular boss; The both sides of next-door neighbour's annular boss are respectively arranged with the groove that is used to embed rubber seal, extend downward to the equal introversion in bi-side of annular boss groove floor.

At threaded connecting metal tubes link internal surface enamel,, the interlayer slit between the internal and external layer material can not occur, thereby realize purpose the effective anti-corrosion of pipe fitting inwall because enamel layer and metal pipe element body inwall are sintered into one.At the boss place of pipe fitting pipe thread bottom, process a spill of placing embedded rubber seal and move back the power groove then, rubber seal is embedded in the groove.When the tubing that has pipe thread screws in the screw thread of pipe fitting, can realize that tubing reliably is connected with pipe fitting.Rubber seal in the while tube end face compression pocket, making does not have the tube end face of coating for protection against corrosion to be coated by rubber seal, avoids it to contact with liquid of carrying, thereby realizes the effective sealing of whole tubing and the purpose of anti-corrosion.In addition because the control action on rubber seal extrusion and groove inclined-plane, make rubber seal be fixed and can not be extruded and fall in the tubing.The water flowing cross section of pipe fitting can not be affected yet.Owing to used above technology, the defective that present known lining plastic pipe and plastic-coated pipe fitting exist has just obtained effectively overcoming.

Compared with prior art, this novelly has following characteristics and an advantage:

1, this novel water flowing cross section of pipe fitting that makes is unaffected, thereby has overcome obvious minimizing flow area that existing ditch seam formula lining plastic pipe exists, increases fluid resistance, reduces the defective of flow.

2, this novel middle enamel layer and inwall are sintered to one, effectively improved anti-corrosion capability, thereby the curb pins layered suture crack that has solved existing plastic lining pipe fitting produce the problem of corrosion;

3, this new structure is simple, with low cost.

Four, description of drawings

Fig. 1 is generalized section of the present utility model (only illustrates the symmetrical line left side half);

Fig. 2 is a scheme of installation of the present utility model.

Five, embodiment

Shown in Figure 2 as Fig. 1, the utility model is at threaded connecting metal tubes link 1 internal surface enamel, forms enamel layer 6, and is zinc-plated or spray paint to outer surface of pipe fittings, forms anticorrosive coat 4, thereby realizes the anti-corrosion effect of pipe fitting inner and outer surface.Place, both sides at pipe fitting pipe thread base circle boss processes groove 3, and rubber seal 5 is embedded in the groove.Extend downward to the equal introversion in bi-side of annular boss groove 3 bottom surfaces.When mounted, the tubing 7 that will have pipe thread screws among the pipe thread 2 of pipe fitting, realizes that tubing reliably is connected with pipe fitting.Tube end face compressing rubber seal ring does not have the tube end face of coating for protection against corrosion to be coated by rubber seal thereby make simultaneously, realizes sealing and anti-corrosion function to whole pipe-line system.Because rubber seal extrusion and groove inclined-plane be to the control action of rubber seal, rubber seal is fixed and can be extruded and falls in the tubing.

Claims

1, a kind of threaded connecting pipeline connecting parts with embedded seal ring inwall enamel, comprise that inwall has the metal tubes link of pipe thread, it is characterized in that topped on described link (1) internal surface have an enamel layer (6), and internal surface is provided with an annular boss; The both sides of next-door neighbour's annular boss are respectively arranged with the groove (3) that is used to embed rubber seal (5), extend downward to the equal introversion in bi-side of annular boss groove (3) bottom surface.

2, pipeline connecting parts according to claim 1 is characterized in that, topped on described link (1) outer surface have an anticorrosive coat (4).