Cross linear distributed fuel gas manifold

Abstract

The invention relates to a cross linear distributed fuel gas manifold. The cross linear distributed fuel gas manifold is characterized in that coaxial holes are formed in a gas inlet pipe in the axial direction at intervals, the axes of all the coaxial holes are on the same plane and perpendicular to the axis of the gas inlet pipe, each threaded pipe joint comprises connecting thread sections, a transition section and a matching section, the connecting thread sections are arranged at the two ends of each threaded pipe joint, a main air hole is formed in each matching section, the threaded pipe joints are inserted into the coaxial holes in a penetrating manner, all the main air holes are formed in the inner hole of the gas inlet pipe, and the gas inlet is fixedly connected with the threaded pipe joints through welding seams in a sealing manner. According to the invention, each threaded pipe joint adopts a double threaded structure, and penetrating sealing welding structures are adopted between the threaded pipe joints and the gas inlet pipe, so that all the threaded pipe joints can meet design requirements, and not only can the sealing welding performance be guaranteed, but also the connecting strength can be improved; the threaded pipe joints don't need to be subjected to correction sizing after being welded, and the primary qualification rate of products is high.

Description

Technical field: [0001] The invention relates to an integrated device for connecting and distributing gas into households, in particular to a centralized gas distribution manifold for gas. Background technique: [0002] Centralized gas distribution manifolds are required during the connection and installation of gas inlets, among which the most used structure is the centralized gas distribution manifolds arranged in a cross-shaped line, which includes intake pipes and threaded pipe joints, threaded pipe joints and intake pipes The connection method between them is direct butt welding method. The specific method is to process a prefabricated air intake hole equivalent to the inner hole of the threaded pipe joint at the predetermined position of the branch air pipe, and then manually align the inner hole of the threaded pipe joint. The prefabricated air intake hole on the air intake pipe is welded together by sealing the outer circle part of the threaded pipe joint and the air...

AI Technical Summary

Problems solved by technology

[0003] First, the welding between the threaded pipe joint and the air intake pipe cannot ensure that the axis of the threaded pipe joint is perpendicular to the axis of the air intake pipe, so that the gas meter cannot be in the predetermined position after installation, and cannot meet the technical requirements of consistent installation height of the gas meter. The technical failure rate is 25% to 30%

[0004] Second, the welding quality between the threaded pipe joint and the intake pipe is difficult to control, and it is prone to false welding, which not only affects the connection strength between the threaded pipe joint and the intake pipe, but also has the potential for air leakage

[0005] Third, the welding process is difficult, and complex fixtures must be used. Not only the intake pipe but also the threaded pipe joint must be fixed, otherwise the relative position of the two cannot be guaranteed. The relative position between the intake pipes is more difficult to ensure in this way, and it is easy to cause welding misalignment, which makes the inner hole of the threaded pipe joint misaligned with the prefabricated air intake hole on the intake pipe, which reduces the intake area, and in serious cases, the intake pipe will be formed. The upper prefabricated air intake hole is exposed, causing the entire gas centralized gas distribution manifold to be scrapped

Not only the welding quality cannot be guaranteed, but also the production efficiency is low

[0006] Fourth, it is very difficult to weld several threaded pipe joints on the intake pipe and make them all in the same plane, and it is impossible to guarantee that all gas meters are in the same plane.

[0007] The gas company has very high requirements on the consistency of the installation level of the gas meter box and the height and spacing of the gas meters in the meter box. In the existing gas meter centralized gas distribution integrated device, the welded connection between the threaded pipe joint and the intake pipe The structure is difficult to meet this technical requirement

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