CN205026235U - Compound high -pressure tubular product is moulded to anticorrosive steel of heavy -calibre - Google Patents

Abstract

The utility model discloses a large-diameter anti-corrosion steel-plastic composite high-pressure pipe material, which comprises a metal frame body and a plastic layer attached to the surface of the metal frame body, and the plastic layer is formed by integral injection molding; the metal frame body includes a tubular The frame part, and the flange frame part located at both ends of the tubular frame part, the pipe wall of the tubular frame part is provided with several injection holes connecting the plastic layer on the outside of the pipe wall with the plastic layer on the inside of the pipe wall, and the flange frame The end surface of the pipe connection side of the flange part is provided with a sealing ring groove forming groove, and the flanging of the flange frame part is provided with several bolt connection hole forming holes along the circumference; the outer end surface of the plastic layer at the sealing ring groove forming groove is formed to accommodate the sealing ring The sealing ring groove is formed into the bolt connection hole by the plastic layer in the bolt connection hole forming hole. The high-pressure pipe material of the utility model adopts large-diameter anti-corrosion steel-plastic composite, and is provided with an integral flange part, the connection structure has high strength, and the connection is convenient and fast.

Description

A large-diameter anti-corrosion steel-plastic composite high-pressure pipe

technical field

The utility model belongs to the technical field of anti-corrosion steel-plastic composite, in particular to a large-diameter anti-corrosion steel-plastic composite high-pressure pipe.

Background technique

Anti-corrosion steel pipe is a steel-plastic composite pipe. The steel-plastic composite pipe currently on the market is mainly an extruded steel-plastic composite pipe from the perspective of the forming method, so the diameter of the produced pipe structure is limited. At the same time, The middle layer of the pipe is metal, but the connection between the pipe and the pipe cannot be connected by butt welding. It must be connected by socket hot melting or compression. Therefore, it is inconvenient to connect the pipe formed by the existing plastic-lined steel pipe. Due to the large diameter of the pipe, the pressure it bears is also high, and failures are prone to occur at the joints, and the production of pipes with a large diameter is very difficult and the cost is very high.

Utility model content

The purpose of this utility model is to provide a large-caliber anti-corrosion steel-plastic composite high-pressure pipe for the above-mentioned problems in the prior art. The plastic layer is integrally formed by injection molding, and the pipe also adopts a flange integral structure. It is also covered by an integrally formed plastic layer, which is convenient for connection, stable in structure, strong in pressure resistance, and prolongs its service life.

In order to achieve the above object, the technical solution adopted by the utility model is:

A large-diameter anti-corrosion steel-plastic composite high-pressure pipe, including a metal frame body, and a plastic layer attached to the surface of the metal frame body, and the plastic layer is integrally injection-molded; the metal frame body includes a tubular frame part, and The flange frame portion at both ends of the tubular frame portion, the pipe wall of the tubular frame portion is provided with several injection holes that connect the plastic layer on the outside of the pipe wall with the plastic layer on the inside of the pipe wall, and the pipe connection side of the flange frame portion The end surface is provided with a sealing ring groove forming groove, and the flanging of the flange frame part is provided with several bolt connection hole forming holes along the circumference; the outer end surface of the plastic layer at the sealing ring groove forming groove is formed into a sealing ring groove for accommodating the sealing ring. The plastic layer in the bolting hole forming hole is molded into the bolting hole.

Preferably, the nominal diameter of the high-pressure pipe is 160-500mm.

Preferably, there are two sealing ring groove forming grooves, and there are two sealing ring grooves on the corresponding plastic layer.

Preferably, it is made of PE, PP-R, pressure-resistant polyethylene PE-RT, polybutene PB, lead-free PVC or ABS.

Owing to adopting above-mentioned technical scheme, the beneficial effect of the utility model is:

A large-diameter anti-corrosion steel-plastic composite high-pressure pipe material of the utility model adopts a metal frame body with a flange structure and forms a plastic layer to cover the surface of the metal frame body through integral injection molding, and is suitable for large-diameter steel pipes. Plastic composite pipe, low production cost, fast connection through its flange structure when connecting, convenient and fast installation, stable structure, no failure at the connection, and an injection-molded sealing ring on the connection end face of the high-pressure pipe The groove can be used to install the sealing ring when connecting, so that the sealing effect of the high-pressure pipe connection is better.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the high pressure pipe of the present invention.

Fig. 2 is a side view of the high-pressure pipe of the present invention.

Fig. 3 is a cross-sectional view along line A-A of Fig. 2 .

FIG. 4 is an enlarged view of part B of FIG. 3 .

Fig. 5 is a structural schematic diagram of the metal frame body of the present invention.

Fig. 6 is an axial full sectional view of the metal frame body of the present invention.

FIG. 7 is an enlarged view of part C in FIG. 6 .

Marks in the figure: 10-plastic layer, 11-bolt connection hole, 12-seal ring groove, 20-metal frame body, 21-tubular frame part, 211-injection hole, 22-flange frame part, 221-bolt connection hole Forming hole, 222-seal ring groove forming groove.

detailed description

Referring to Figures 1-7, a large-diameter anti-corrosion steel-plastic composite high-pressure pipe of the present invention includes a metal frame body 20, and a plastic layer 10 attached to the surface of the metal frame body 20, and the plastic layer 10 is formed by integral injection molding , through the covering of the plastic layer 10, all the metal surfaces of the metal frame body 20 are covered, no metal is exposed outside, and it is not easy to corrode and rust.

The metal frame body 20 includes a tubular frame portion 21, and flange frame portions 22 positioned at both ends of the tubular frame portion 21. The pipe wall of the tubular frame portion 21 is provided with a plastic layer 10 on the outside of the pipe wall and a plastic layer 10 on the inside of the pipe wall. A plurality of injection holes 211 connected together, during injection molding, the liquid inside and outside the tube wall can flow through the injection holes 211, improving the circulation of injection molding. The end surface of the pipe connection side of the flange frame part 22 is provided with a sealing ring groove forming groove 222, and the flange of the flange frame part 22 is provided with several bolt connection hole forming holes 221 along the circumference; The outer end surface of the layer 10 is formed into a seal ring groove 12 for accommodating the seal ring, and the plastic layer 10 in the bolt connection hole forming hole 221 is formed into the bolt connection hole 11 . There are two seal ring groove forming grooves 222 , corresponding to two seal ring grooves 12 on the plastic layer 10 .

The nominal diameter of the high pressure pipe is 160-500mm.

When the high-pressure pipe is produced, the metal frame body 20 is put into the injection molding machine, and the material of the plastic layer 10 is PE, PP-R, pressure-resistant polyethylene PE-RT, polybutylene PB, lead-free PVC or ABS material, The metal frame body 20 is put into the mold, and after injection molding, the plastic layer 10 wraps the metal frame body 20 to form an integral pipe.

When the high-pressure pipes are connected, the sealing ring is inserted into the sealing ring groove 12 of the flange end face of the pipe, and the pipes are connected with the flanges by bolts to realize the fixed connection of the pipes.

Claims (4)

1. the high pressure pipe material of a heavy caliber antiseptic steel-plastic compound, it is characterized in that, comprise metallic bodies (20), and be attached to the plastic layer (10) on metallic bodies (20) surface, and plastic layer (10) adopts integrated injection molding, described metallic bodies (20) comprises tubular frame portion (21), and be positioned at the flange frame section (22) at tubular frame portion (21) two ends, the tube wall in tubular frame portion (21) is provided with several injection orifices (211) that the plastic layer (10) outside by tube wall is connected as a single entity with the plastic layer (10) inside tube wall, the tubing connection side end face of flange frame section (22) is provided with seal groove forming tank (222), the flange of flange frame section (22) is circumferentially provided with several bolt connecting hole forming holes (221), be molded into the seal groove (12) holding seal ring in plastic layer (10) exterior edge face at seal groove forming tank (222) place, the plastic layer (10) in bolt connecting hole forming hole (221) hole is molded into bolt connecting hole (11).

2. the high pressure pipe material of heavy caliber antiseptic steel-plastic compound according to claim 1, is characterized in that, the nominal diameter of high pressure pipe material is 160-500mm.

3. the high pressure pipe material of heavy caliber antiseptic steel-plastic compound according to claim 1, it is characterized in that, described seal groove forming tank (222) is provided with two, and the seal groove (12) on corresponding plastic layer (10) is provided with two.

4. the high pressure pipe material of heavy caliber antiseptic steel-plastic compound according to claim 1, is characterized in that, described plastic layer (10) adopts PE, PP-R, withstand voltage polythene PE-RT, polybutylene PB, lead-free PVC or ABS material to make.