A new type of HDPE water spray pipe row

Abstract

The utility model relates to the technical field of anchor bolt, and disclose a novel HDPE water pipe row, including main pipeline, the pipe wall of main pipeline is distributed with branch pipe, the periphery of branch pipe forms annular branch pipe seat, above -mentioned main pipeline, branch pipe and annular branch pipe seat are all polyethylene material, and the department of branch pipe is connected with metal pipe seat, and metal pipe seat is whole and presents circular tubular structure, metal pipe seat is super austenitic stainless steel material, above -mentioned main pipeline, branch pipe, annular branch pipe seat and metal pipe seat are integral structure. Compared with prior art, the utility model provides a novel HDPE water pipe row, has the following beneficial effects: HDPE pipe row is suitable for nuclear power plant backwashing circulating water system, plays the role of spraying filtration and preventing seawater corrosion. The service life of the HDPE pipe row is long, and the corrosion resistance is good, wherein the steel-plastic integrated structure formed by injection molding has sufficient strength and good shock resistance, and is widely used in nuclear power stations using seawater as medium.

Description

Technical Field

[0001] This utility model relates to the technical field of spray pipes for filter backwashing systems, specifically a new type of HDPE spray pipe, and particularly its mechanical connection structure. Background Technology

[0002] Currently, stainless steel is widely used in the spray pipes and nozzles of the drum filter backwashing system in nuclear power plants. It is manufactured through processes such as drilling holes in stainless steel pipes, welding threaded pipe seats, and connecting nozzles.

[0003] A survey of the operation of stainless steel seawater pipelines in the backwashing systems of multiple nuclear power plants revealed widespread corrosion in the stainless steel pipelines of both in-service and under-construction nuclear power units, particularly in those with longer operating histories. Due to the cumulative effects of long-term oxidation and corrosion from chlorinated seawater, deterioration of seawater quality, and various complex operating conditions, perforation corrosion of the spray pipes and nozzles have appeared in in-service nuclear power plants, severely impacting the reliable operation of the drum filter backwashing system.

[0004] High-density polyethylene (HDPE) pipes have been widely used in chemical, municipal and marine engineering fields due to their many advantages such as corrosion resistance, radiation resistance, good seismic performance and long service life, and have gradually become an excellent alternative to carbon steel pipes and stainless steel pipes. Utility Model Content

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a novel HDPE water spray pipe system, in which both the main pipe and branch pipes are made of polyethylene material, and the branch pipes are equipped with super austenitic stainless steel metal pipe seats, thereby improving the corrosion resistance of the product and solving the problems mentioned in the background.

[0006] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: It includes a main pipe, branch pipes distributed on the pipe wall of the main pipe, and an annular branch pipe seat formed around the periphery of each branch pipe. The main pipe, branch pipes, and annular branch pipe seat are all made of polyethylene. A metal pipe seat is fitted onto the branch pipe, and the metal pipe seat has an overall circular tubular structure. The metal pipe seat is made of super austenitic stainless steel. The lower part of the metal pipe seat is located between the inner wall of the annular branch pipe seat and the outer wall of the branch pipe. Annular ribs are distributed on the outer wall of the lower part of the metal pipe seat, and these ribs are embedded in the inner wall of the annular branch pipe seat. Several through holes are also formed on the lower pipe wall of the metal pipe seat, and these through holes are filled with polyethylene material. An annular embedded part is formed on the inner wall of the upper cavity of the metal pipe seat, and this annular embedded part is embedded in the outer wall of the branch pipe. An inner ring is formed on the lower end face of the metal pipe seat, and this inner ring is embedded in the pipe wall of the main pipe. The main pipe, branch pipes, annular branch pipe seat, and metal pipe seat form an integrated structure.

[0007] Compared with existing technologies, this utility model provides a novel HDPE spray pipe bank with the following advantages: The HDPE pipe bank is suitable for backwashing circulating water systems in nuclear power plants, serving as a spray filter and preventing seawater corrosion. This HDPE pipe bank has a long service life and good corrosion resistance. Its injection-molded steel-plastic integrated structure has sufficient strength and good seismic resistance, making it widely applicable in nuclear power plants using seawater as the medium. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a three-dimensional view of a metal tube base. Detailed Implementation

[0009] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0010] like Figure 1-2 As shown, this utility model provides a novel HDPE water spray pipe system, including a main pipe 1, with branch pipes 2 distributed on the wall of the main pipe 1. The system is characterized in that: an annular branch pipe seat 5 is formed around the periphery of each branch pipe 2; the main pipe 1, branch pipes 2, and annular branch pipe seat 5 are all made of polyethylene; a metal pipe seat 3 is fitted onto the branch pipe 2; the metal pipe seat 3 has an overall circular tubular structure; the metal pipe seat 3 is made of super austenitic stainless steel; and the lower part of the metal pipe seat 3 is located between the inner wall of the annular branch pipe seat 5 and the outer wall of the branch pipe 2. The lower outer wall of the pipe seat 3 is provided with annular ribs 6, which are embedded in the inner wall of the annular branch pipe seat 5. Several through holes 7 are also provided on the lower pipe wall of the metal pipe seat 3, and polyethylene material is filled in the through holes 7. An annular embedded part 8 is formed on the inner wall of the cavity in the upper part of the metal pipe seat 3. The annular embedded part 8 is embedded in the outer wall of the branch pipe 2. An inner ring 9 is formed on the lower end face of the metal pipe seat 3. The inner ring 9 is embedded in the pipe wall of the main pipe 1. The main pipe 1, branch pipe 2, annular branch pipe seat 5 and metal pipe seat 3 are integrated into one structure.

[0011] In practice, the through holes 7 are symmetrically distributed.

[0012] In specific implementation, the outer diameter of the upper part of the metal tube seat 3 is larger than the outer diameter of the lower part of the metal tube seat 3.

[0013] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel HDPE water spray pipe system, comprising a main pipe (1), wherein branch pipes (2) are distributed on the wall of the main pipe (1), characterized in that: The outer periphery of the branch pipe (2) forms an annular branch pipe seat (5). The main pipe (1), branch pipe (2) and annular branch pipe seat (5) are all made of polyethylene. The branch pipe (2) is fitted with a metal pipe seat (3). The metal pipe seat (3) is a circular tubular structure. The metal pipe seat (3) is made of super austenitic stainless steel. The lower part of the metal pipe seat (3) is located between the inner wall of the annular branch pipe seat (5) and the outer wall of the branch pipe (2). The outer wall of the lower part of the metal pipe seat (3) is distributed with annular ribs (6). The ribs (6) are embedded in the annular... The inner wall of the branch pipe seat (5) and the lower part of the pipe wall of the metal pipe seat (3) are provided with several through holes (7). The through holes (7) are filled with polyethylene material. An annular embedded part (8) is formed on the inner wall of the upper cavity of the metal pipe seat (3). The annular embedded part (8) is embedded in the outer wall of the branch pipe (2). An inner ring (9) is formed on the lower end face of the metal pipe seat (3). The inner ring (9) is embedded in the pipe wall of the main pipe (1). The main pipe (1), branch pipe (2), annular branch pipe seat (5) and metal pipe seat (3) are integrated into one structure.

2. The novel HDPE water spray pipe assembly according to claim 1, characterized in that: The through holes (7) are symmetrically distributed.

3. A novel HDPE water spray pipe assembly according to claim 2, characterized in that: The outer diameter of the upper part of the metal tube seat (3) is greater than the outer diameter of the lower part of the metal tube seat (3).

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