CN204729782U - A kind of heavy caliber steel pipe fittings - Google Patents

Abstract

The utility model discloses a novel large-diameter steel pipe fitting, which comprises a pipe fitting base made of welded or seamless steel pipe fittings, the inner and outer surfaces of the pipe fitting base are sprayed with epoxy resin anticorrosion layers, and the pipe ends of the pipe fitting base are provided with There is an O-shaped sealing ring, and a polyethylene plastic layer is arranged outside the O-shaped sealing ring; steel vertical ribs are fixed at the end of the pipe to enhance the axial strength of the plastic at the end of the pipe. The end of the pipe is wrapped with polyethylene plastic, one is to compact the sealing ring for sealing, and the other is to match the large-diameter steel-plastic composite pipeline project, and the existing electric melting belt is used for connection. Steel strip vertical ribs are welded at the pipe end to enhance the axial strength of the plastic at the pipe end. The utility model can effectively guarantee the strength and pressure bearing capacity of the pipe fittings.

Description

A large diameter steel pipe fitting

technical field

The utility model relates to a novel large-diameter steel pipe fitting.

Background technique

Steel pipe fittings based on known technologies generally include steel pipe elbows, variable diameters and tees, etc., which are mainly used for steel pipes, and the connection forms are mostly welded or flanged. When steel pipe fittings are used for plastic pipes, flange connection is generally used, which requires special pure plastic or steel-plastic flanges with skeletons to be used for connection with steel pipe fittings, which increases costs. When plastic pipes are used When the flange connection is sealed, because the thermal expansion and contraction of the pipe body is greatly affected by the change of the ambient temperature and the temperature of the medium, the flange seal is not reliable when applied to the plastic pipe connection. As time goes by, the probability of flange seal leakage It will increase, which will bring hidden dangers to the safety of pipeline use. The utility model will solve the connection and sealing problem of the above-mentioned steel pipe fittings and plastic pipes.

Utility model content

The technical problem to be solved by the utility model is to provide a large-diameter steel pipe fitting with simple structure, convenient connection and good connection sealing performance, which is used for supporting large-diameter steel-plastic composite pipeline engineering.

In order to achieve the above technical problems, the technical solution provided by the utility model is: a large-diameter steel pipe fitting, the key technology of which is: it includes a pipe fitting base made of welded or seamless steel pipe fittings, the pipe fitting base The inner and outer surfaces are sprayed with an epoxy resin anti-corrosion layer, and the pipe end of the pipe fitting base is provided with an O-shaped sealing ring, and a polyethylene plastic layer is provided outside the O-shaped sealing ring;

The pipe end is fixed with a steel vertical rib for enhancing the axial strength of the plastic at the pipe end.

Preferably, the pipe end of the pipe base is provided with an annular groove, and the O-ring is located in the annular groove.

Preferably, the steel vertical ribs are covered in a polyethylene plastic layer, and the number of vertical ribs and the strength of the steel strips are determined according to actual conditions.

The beneficial effects produced by adopting the above technical scheme are: the utility model uses welded or seamless steel pipe fittings as the pipe fitting base, and O-shaped sealing rings, polyethylene plastic layers and steel belt vertical ribs are arranged at the pipe ends, which can Effectively guarantee the strength and pressure bearing capacity of the pipe fittings, and protect the pipe fittings from corrosion. The O-ring is placed at the end of the pipe and wrapped with polyethylene plastic, which can effectively seal the pipe fitting port. When matched with large-diameter steel-plastic composite pipeline projects, The connection can be made by using the existing electric melting belt, and the connection is convenient, reliable and low in cost.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Among them, 1. pipe fitting substrate, 2. steel belt vertical rib, 3. O-shaped sealing ring, 4. polyethylene plastic layer.

Detailed ways

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative work.

Referring to accompanying drawing 1, this large-diameter steel pipe fitting uses welded or seamless steel pipe fittings as the pipe fitting base 1 to ensure the pressure bearing capacity of the pipe fittings. Epoxy resin is sprayed on the inner and outer surfaces of the pipe fitting matrix 1 to protect the pipe fitting matrix from corrosion. The pipe end of the pipe fitting matrix 1 is sealed with an O-ring 3 and a polyethylene plastic layer 4 . Place the O-ring 3 in the annular groove opened in the pipe of the pipe fitting base 1, wind the polyethylene sheet at the end of the pipe to form a polyethylene plastic layer 4, and use the shrinkage characteristics of the polyethylene plastic to realize the sealing of the O-ring 3 Compact and seal. The pipe end of the pipe fitting base 1 is welded with steel strip vertical ribs, which are used to enhance the axial strength of the plastic at the pipe end. The number of vertical ribs and the strength of the steel strips are determined according to the actual situation. The steel pipe fittings will be used in large-diameter steel-plastic composite pipeline projects, and the existing electric melting belts will be used for connection. The width of the polyethylene plastic at the pipe end shall meet the welding requirements of the electric heating belt.

During use, the surface of the polyethylene plastic layer 4 needs to be polished to remove scale, and an electric heating belt is used to connect the steel-plastic composite pipe. This large-diameter steel pipe fitting can be used for supporting large-diameter steel-plastic composite pipe engineering, and can well meet the requirements of pressure, anti-corrosion, sealing and connection.

Parts not described in detail in the utility model belong to the common knowledge of those skilled in the art. The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (3)

1. a heavy caliber steel pipe fittings, it is characterized in that: it comprises through the pipe fitting matrix (1) be welded or seamless steel pipe fittings is made, the inner and outer surface of described pipe fitting matrix (1) is coated with epoxy resin anticorrosive coat, the pipe end of described pipe fitting matrix (1) is provided with O RunddichtringO (3), and described O RunddichtringO (3) outside is provided with polyvinyl plastics layer (4);

The steel of the axial strength that the pipe end of described pipe fitting matrix (1) is fixed with for strengthening pipe end plastics founds rib (2).

2. heavy caliber steel pipe fittings according to claim 1, is characterized in that: the pipe end of described pipe fitting matrix (1) offers the groove of annular, and described O RunddichtringO (3) is positioned at the groove of this annular.

3. heavy caliber steel pipe fittings according to claim 1 and 2, is characterized in that: described steel founds rib (2) and is coated in polyvinyl plastics layer (4).