CN201014096Y

CN201014096Y - Inner composite plastics metallic threaded pipe member

Info

Publication number: CN201014096Y
Application number: CNU2006200214815U
Authority: CN
Inventors: 陈东易; 黎莲威
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-08-21
Filing date: 2006-08-21
Publication date: 2008-01-30
Anticipated expiration: 2016-08-21

Abstract

The utility model relates to an inner composite plastic and metal screw thread pipe component, an external shell is a metal pipe component with inner screw thread at the mouth end, a inner container with a reinforced root made of hard plastic is arranged on the screw thread of the metal pipe component, the bottom of the external end surface of the inner container is provided with the screw thread matched with the external shell, a rubber sealing ring is positioned at the external end surface of the inner container with a 1/3 length to the mouth end of the pipe component, a elastic rubber supporting and fastening ring is positioned at the bottom of the external end surface of the inner container with the reinforced root, all parts of the pipe component are compounded by plastic except for screw thread part. Besides the effects of fully antirust and anticorrosion, the utility model also has the effects that the traditional installing method of the screw thread is changed and the installation and operation procedures are simplified, the construction danger is reduced and the safety factors and construction speed is increased, furthermore, as air or gas can not contact the screw thread of the throat cutting surface completely, the rustiness can be avoided, the service life of the system is prolonged in large scale, thus reducing the cost, saving resources and improving economic benefits.

Description

The metal threaded pipe fitting of interior composite plastic

Affiliated field: the utility model relates to a kind of interior metal threaded pipe fitting of composite plastic.

Background technique:

All there is defective in various degree in metal pipe element major part commonly used, can not reach comprehensively anti-iron rust and etch-proof function simultaneously, accomplishes the installing engineering cost is low, connection mouth is wanted good seal requirement and condition, makes the life-span of pipeline shorten significantly.Common defective pipe fitting on the market: 1, pipe fitting as making with iron, steel, can not prevent iron rust and corrosion protection; Though 2, the pipe fitting made from copper can be prevented iron rust but can not corrosion protection; 3, the pipe fitting made from stainless steel can be prevented iron rust but differ corrosion protection surely.

Summary of the invention:

The purpose of this utility model provides a kind of anti-iron rust, corrosion protection and need not to do with flax silk, raw meal belt or other equivalent effect material when mounted the metal threaded pipe fitting of interior composite plastic of sealing.The purpose of this utility model realizes by following structure: the utility model is a kind of interior metal threaded pipe fitting of composite plastic, shell has the metal pipe element of internal thread for mouthful end, the mouth end enters screw position a fixing sealing rubber ring is installed, sealing rubber ring is close to the plastic layer of trunnion, equipped inner bag on the metal pipe element screw thread by the band enhancing root of making than duroplasts, bottom, inner bag exterior edge face is the screw thread that mates with shell, elastic caoutchouc holder collar is installed in bottom, enhancing root inner bag exterior edge face, remove the screw thread position in the pipe fitting, other position all uses plastics compound.Effect of the present utility model, except preventing fully iron rust and the corrosion protection, changed traditional screw thread installation method, simplified again and installed and operation, it is dangerous that construction is reduced, increased safety coefficient and improved speed of application, and since liquid or gas do not contact fully with the cutting surface screw thread of trunnion, so can so and not get rusty, prolonged the life-span of system significantly, thereby reduced cost, saved resource, improved benefit.The utility model reduces the technical factor restriction and the influence of artificial installation greatly, thereby monoenergetic does not guarantee that the effect that seals can also reach a linear pressure index of the metal threaded pipe fitting design of composite plastic in the high standard fully, save engineering cost in a large number, changed the backward process engineering pipe connecting method that threaded fitting will just can not leak with the material of flax silk, raw meal belt or other equivalent effect fully.The pipe fitting of Any shape, specification all can adopt the present technique manufacturing.

Description of drawings:

Fig. 1 is the utility model overall structure sectional view

Embodiment:

The utility model as shown in Figure 1 is a kind of interior metal threaded pipe fitting of composite plastic, shell 1 has the metal pipe element of internal thread for mouthful end, equipped inner bag 2 on the metal pipe element screw thread by the band enhancing root of making than duroplasts, bottom, inner bag 2 exterior edge faces is and the screw thread of shell coupling that elastic caoutchouc holder collar 4 is installed in bottom, enhancing root inner bag 2 exterior edge faces.The exterior edge face of inner bag 2 has groove one near jointing, and elastic rubber sealing ring 3 is installed in the groove, is close to trunnion plastic lining layer 5.Remove the screw thread position in the pipe fitting, other position all uses plastics compound.

The inner bag 2 that harder plastics are made, it is for the position that seal ring is installed that there is one protruding groove location the exterior edge face of inner bag 2 near jointing, and exterior edge face bottom have can with the screw thread of shell 1 coupling, during assembling behind the plastics of coating the plastics used on the composite pipe fitting or equivalent effect on the screw thread earlier, the assembling of just having finished parts is held at the end that inner bag 2 is threaded into shell 1 spiral shell to the greatest extent, the effect of these parts is to have replaced shell 1 by the screw thread required sealing load that bears and form an interlayer position that is screwed into when being connected for trunnion with trunnion, and confession trunnion and pipe fitting are screwed into when plugging into.All need install one at each roll line position of pipe fitting.A seal ring made from rubber is mounted in 2 exterior edge face groove location, the interior edge face of seal ring is close to 2 exterior edge face, and the exterior edge face is towards the hand of spiral of shell 1, when trunnion be screwed into the pipe fitting interlayer install screw thread that effect that the interior edge face that can be close to trunnion in the exterior edge face of back seal ring played sealing makes cutting surface that liquid in the pipeline or gas can not contact trunnion and trunnion with and the screw thread of shell 1, so need not to use the material of flax silk, raw meal belt or equivalent effect to seal when mounted.Also because liquid and gas can not touch the cutting surface of trunnion and screw thread so played complete antirust and etch-proof effect, need not to use flax silk during simultaneously owing to installation, the material of raw meal belt or equivalent effect has changed traditional screw thread method of plugging into fully makes installation and easy to maintenance, safety, lowered cost, and the sealing principle of seal ring is when being hydraulic pressure in seal ring is subjected to trunnion or air pressure, it can relatively increase sealing intensity, need not to rely on artificial technical factor simultaneously and install, guaranteed that conscientiously the interior metal threaded pipe fitting of composite plastic of high standard seals the effect of a line.And traditional installation be with flax silk or and so on material be the principle of filling out envelope, must be public allowing material concavo-convexly be screwed tight packing, to compel to expire, compel to disappear by manually being screwed into energetically again behind the screw thread of the careful attached trunnion fortunately of the material of flax silk and so on laryngeal forceps by the people, being screwed into concavo-convex screw thread urges the material of flax silk and so on and wears into semi-liquid-like, just can play the effect of sealing, so artificial technical requirements factor is extremely important, thereby be difficult to guarantee that sealing effect can not guarantee that more sealing effect is on a line effect.Adopt rubber seal because its elasticity is big, also have two big advantages, the first can shockproof degree outclass rigid being threaded, and it two is to require low acceptable tolerance big to the plane of trunnion, relatively is fit to the trunnion that the uneven tube mill of the present quality of coupling produces.This shows that adopting rubber seal is the development trend of pipe-line system.An elastic caoutchouc holder collar that is installed in bottom, band enhancing root inner bag 2 exterior edge faces has replaced and will be attached on the screw thread and could fix tight effect in pipe fitting to trunnion with flax silk, raw meal belt or equivalent effect material.And this rubber ring is to adopt resilient especially rubber, and length requires the first mate to reduce when making the workman be screwed into threaded trunnion, and promptly technical requirements is low.The metal pipe element interior edge face is except that the screw thread position being arranged and all the other positions being installed inner bag 2 positions all having used plastics compound, complex method is placed on the compound deal of pipe fitting needs to be needed with machine it evenly to be layered on the compound position of need behind the compound place, and Yong Baked Lu is baked to required requirement then.

Claims

1. the metal threaded pipe fitting of composite plastic in a kind, it is characterized in that: shell has the metal pipe element of internal thread for mouthful end, the mouth end enters screw position a fixing sealing rubber ring is installed, sealing rubber ring is close to the plastic layer of trunnion, equipped inner bag on the metal pipe element screw thread by the band enhancing root of making than duroplasts, bottom, inner bag exterior edge face is the screw thread that mates with shell, elastic caoutchouc holder collar is installed in bottom, enhancing root inner bag exterior edge face, remove the screw thread position in the pipe fitting, other position all uses plastics compound.