CN223975689U - A steel-plastic composite pipe double-closed connection structure - Google Patents

Abstract

The utility model relates to the technical field of pipeline connection, and particularly discloses a double-density connection structure of a steel-plastic composite pipeline, which comprises two sections of steel-plastic composite pipes, an inner layer plastic sleeve and an outer layer metal sleeve, wherein the inner layer plastic sleeve and the outer layer metal sleeve are connected between the two sections of steel-plastic composite pipes, the ends of the two sections of steel-plastic composite pipes are respectively sleeved at the two ends of the inner layer plastic sleeve, an elastic rubber ring is arranged on a gentle section of the inner layer plastic sleeve, a metal sealing ring is arranged at the end of the steel-plastic composite pipe, a nano ceramic coating is coated on the metal sealing ring, the outer layer metal sleeve is of a cylindrical structure, an inner thread is arranged on the inner wall of the outer layer metal sleeve, the two ends of the outer layer metal sleeve are respectively sleeved at the butt joint ends of the two sections of steel-plastic composite pipes and are in threaded connection with the steel-plastic composite pipes, the two half cylinders are arranged in a butt joint mode, connecting lug plates are arranged at the two sides of each half cylinder, through holes are formed in the connecting lug plates, and the connecting lug plates of the two half cylinders are fixed through bolts, so that double anchoring is realized, and the stability, the tightness and the reliability of connection are improved.

Description

Double-density connection structure of steel-plastic composite pipeline

Technical Field

The utility model relates to the technical field of pipeline connection, in particular to a double-sealing connection structure of a steel-plastic composite pipeline.

Background

In the engineering fields of water supply and drainage, gas transportation and the like, the steel-plastic composite pipeline is widely applied by virtue of the high strength of steel and the corrosion resistance of plastics, however, the existing steel-plastic composite pipeline connecting mode has a plurality of problems, such as complex connecting structure, low construction efficiency caused by the fact that a large number of specialized tools are required to be used in the installation process, poor sealing effect, easy leakage phenomenon in the long-term use process, more prominent sealing failure problem, and influence on the overall performance and service life of the pipeline, and therefore, a steel-plastic composite pipeline connecting device capable of effectively solving the problems is needed.

Disclosure of utility model

The utility model aims to provide a double-sealing connection structure of a steel-plastic composite pipeline, which aims to solve the technical problems of inconvenient installation, poor sealing effect and the like of the traditional steel-plastic composite pipeline connection mode.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

The utility model provides a two close connection structure of compound pipeline is moulded to steel, includes two sections steel and moulds compound pipe to and connect inlayer plastic sleeve and outer metal sleeve between two sections steel and mould compound pipe, inlayer plastic sleeve is the spinning cone that reduces gradually by middle part external diameter to tip external diameter, and inlayer plastic telescopic tip is the mild section that the diameter is the same, and two sections steel are moulded compound pipe tip and are overlapped at inlayer plastic sleeve both ends respectively, be equipped with elastic rubber circle on the mild section of inlayer plastic telescopic, steel is moulded compound pipe tip and is equipped with the metal seal ring, and the coating has nano ceramic coating on the metal seal ring, outer metal sleeve is tubular structure, and outer metal sleeve inner wall is equipped with the internal thread, and outer metal sleeve both ends are overlapped respectively at butt joint end and the steel and mould compound pipe threaded connection of two sections steel and mould compound pipe, outer metal sleeve includes two semi-cylinders that butt joint set up, and semi-cylinder both sides all are equipped with the engaging lug board, have seted up the through-hole on the engaging lug board, pass through the bolt fastening between the engaging lug board of two semi-cylinders.

Further, the steel-plastic composite pipe comprises a plastic layer arranged on the inner layer and a metal layer arranged on the outer layer.

Further, the metal sealing ring is coated with a nano ceramic coating.

Further, the length of the inner plastic sleeve is longer than that of the outer metal sleeve.

Furthermore, the outer surface of the inner layer plastic sleeve is provided with a barb-shaped protruding structure.

Compared with the prior art, the utility model has the following characteristics and beneficial effects:

According to the utility model, the outer metal sleeve is in threaded engagement with the outer wall of the steel-plastic composite pipe, and the barb-shaped protruding structure of the inner plastic sleeve is fused with the inner plastic of the steel-plastic composite pipe, so that double anchoring is realized, the stability and reliability of connection are improved, the elastic rubber ring of the inner plastic sleeve can be heated and expanded to compensate material shrinkage, adapt to temperature difference deformation, dynamic sealing is realized, leakage phenomenon is effectively prevented, the corrosion resistance can be remarkably improved, the outer metal sleeve is in a free-hand rotary locking mode, no complex special tool is required, single-point connection can be rapidly completed, the construction efficiency is greatly improved, the construction cost is reduced, the safety and applicability characteristics are realized, good popularization and practical value are realized, and good economic benefits can be generated after wide popularization and application.

Drawings

FIG. 1 is a schematic view of a partial cross-sectional structure of the present utility model;

FIG. 2 is a schematic cross-sectional view of an outer metal sleeve according to the present utility model.

The steel-plastic composite pipe is provided with the reference numerals of 1, 2, an inner plastic sleeve, 3, an outer metal sleeve, 4, a connecting lug plate, 5, a bolt, 6 and a metal sealing ring.

Detailed Description

The present utility model will be further described below in order to make the technical means, innovative features, achieved objects and effects achieved by the present utility model easy to understand.

The examples described herein are specific embodiments of the present utility model, which are intended to illustrate the inventive concept, are intended to be illustrative and exemplary, and should not be construed as limiting the utility model to the embodiments and scope of the utility model. In addition to the embodiments described herein, those skilled in the art can adopt other obvious solutions based on the disclosure of the claims and specification, including those adopting any obvious substitutions and modifications to the embodiments described herein.

The utility model discloses a double-density connection structure of a steel-plastic composite pipeline, which is shown in figures 1 and 2, and comprises two sections of steel-plastic composite pipes 1, an inner layer plastic sleeve 2 and an outer layer metal sleeve 3 which are connected between the two sections of steel-plastic composite pipes 1, wherein the length of the inner layer plastic sleeve 2 is longer than that of the outer layer metal sleeve 3, the port of the outer layer metal sleeve 3 is a taper-shaped closing-in, the steel-plastic composite pipe 1 comprises a plastic layer arranged on the inner layer, and a metal layer arranged on the outer layer, the inner layer plastic sleeve 2 is in a spinning taper shape with the outer diameter gradually reduced from the middle part to the end part, the end part of the inner layer plastic sleeve 2 is a gentle section with the same diameter, the outer surface of the inner layer plastic sleeve 2 is in a barb-shaped bulge structure, the end parts of the two sections of the steel-plastic composite pipes 1 are respectively sleeved at two ends of the inner layer plastic sleeve 2, the barb-shaped bulge structure on the inner layer plastic sleeve 2 is embedded into the plastic layer of the inner layer of the steel-plastic composite pipe 1 after being melted, thereby increasing the friction coefficient between the inner layer plastic sleeve 2 and the steel-plastic composite pipe 1, realizing the stable sealing connection between the inner layer plastic sleeve 2 and the steel-plastic composite pipe 1, arranging an elastic rubber ring on the gentle section of the inner layer plastic sleeve 2, when the inner layer plastic sleeve 2 is heated, the elastic rubber ring is also heated and expanded, thereby realizing the secondary sealing between the inner layer plastic sleeve 2 and the steel-plastic composite pipe 1, compensating the material cold contraction caused by temperature change, ensuring the sealing reliability, arranging a metal sealing ring 6 at the end part of the steel-plastic composite pipe 1, coating a nano ceramic coating on the surface of the metal sealing ring 6, having excellent anti-corrosion performance, effectively protecting the metal sealing ring 6, prolonging the service life, simultaneously, the metal sealing ring 6 can fill the tiny gap of the end surface of the steel-plastic composite pipe 1 in the connection process, playing the primary sealing role, the outer metal sleeve 3 is tubular structure, the outer metal sleeve 3 inner wall is equipped with the internal thread, the butt joint end and the steel of two sections steel-plastic composite pipe 1 of outer metal sleeve 3 both ends difference cover are moulded composite pipe 1 threaded connection, outer metal sleeve 3 includes two semi-cylinders that butt joint set up, semi-cylinder is half cylindrical tubular structure, semi-cylinder both sides all are equipped with connect the otic placode 4, the through-hole has been seted up on connect the otic placode 4, fix through bolt 5 between the connect the otic placode 4 of two semi-cylinders, the outer metal sleeve 3 outside is equipped with the pressure indicator strip, during the installation, at first, select inlayer plastic sleeve 2 and outer metal sleeve 3 of suitable pipe diameter according to steel-plastic composite pipe 1, polish and coat epoxy primer according to the preliminary treatment step with the terminal surface of two steel-plastic composite pipe 1 that need be connected, then use heating equipment to heat inlayer plastic sleeve 2 both ends, after softening, insert steel-plastic composite pipe 1 tip rapidly, make the barb form protruding structure on inlayer plastic sleeve 2 fuse with steel-plastic composite pipe 1 inlayer, afterwards, cover outer metal sleeve 3 at the butt joint end of two sections steel-plastic composite pipe 1, outer metal sleeve 3 outside tightening up the pressure indicator strip, when tightening the outer metal sleeve 3, when the outer metal sleeve is tightened up by the outer metal sleeve is pressed down, the outer metal sleeve is pressed down by the pressure indicator strip is realized, when the outer layer is sealed, the outer metal sleeve is sealed, and the outer layer is pressed, and the outer layer is sealed, and the outer layer is pressed, and the outer.

According to the utility model, the outer metal sleeve is meshed with the outer wall of the steel-plastic composite pipe through the threads, and the barb-shaped protruding structure of the inner plastic sleeve is fused with the inner plastic of the steel-plastic composite pipe, so that double anchoring is realized, the stability and reliability of connection are improved, the elastic rubber ring of the inner plastic sleeve can be heated and expanded to compensate material cold contraction, the temperature difference deformation is adapted, dynamic sealing is realized, the leakage phenomenon is effectively prevented, the corrosion resistance can be remarkably improved through the nano ceramic coating on the surface of the metal sealing ring, the outer metal sleeve is locked by free hand rotation, single-point connection can be rapidly completed without using complex special tools, the construction efficiency is greatly improved, and the construction cost is reduced.

While the fundamental and principal features of the utility model and advantages of the utility model have been shown and described, it will be apparent to those skilled in the art that the utility model is not limited to the details of the foregoing exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (5)

1. A double-closed connection structure for steel-plastic composite pipes, characterized in that: it includes two sections of steel-plastic composite pipe (1), and an inner plastic sleeve (2) and an outer metal sleeve (3) connected between the two sections of steel-plastic composite pipe (1). The inner plastic sleeve (2) is spindle-shaped with its outer diameter gradually decreasing from the middle to the end. The end of the inner plastic sleeve (2) is a flat section with the same diameter. The ends of the two sections of steel-plastic composite pipe (1) are respectively fitted onto the two ends of the inner plastic sleeve (2). An elastic rubber ring is provided on the flat section of the inner plastic sleeve (2). The end is provided with a metal sealing ring (6), and the metal sealing ring (6) is coated with a nano-ceramic coating. The outer metal sleeve (3) is a cylindrical structure. The inner wall of the outer metal sleeve (3) is provided with an internal thread. The two ends of the outer metal sleeve (3) are respectively fitted onto the joint ends of the two steel-plastic composite pipes (1) and threadedly connected to the steel-plastic composite pipes (1). The outer metal sleeve (3) includes two semi-cylinders that are joined together. Both sides of the semi-cylinders are provided with connecting ear plates (4). The connecting ear plates (4) are provided with through holes. The connecting ear plates (4) of the two semi-cylinders are fixed together by bolts (5). 2. The double-closed connection structure of steel-plastic composite pipe according to claim 1, characterized in that: the steel-plastic composite pipe (1) includes a plastic layer disposed in the inner layer and a metal layer disposed in the outer layer. 3. The double-closed connection structure of steel-plastic composite pipe according to claim 2, characterized in that: the metal sealing ring (6) is coated with a nano-ceramic coating. 4. The double-closed connection structure of steel-plastic composite pipe according to claim 1, characterized in that: the length of the inner plastic sleeve (2) is greater than the length of the outer metal sleeve (3). 5. A double-closed connection structure for steel-plastic composite pipes according to any one of claims 1 to 4, characterized in that: the outer surface of the inner plastic sleeve (2) is provided with a barbed protrusion structure.