Slurry pipe assembly of horizontal directional drilling machine

Abstract

The invention discloses a horizontal directional drilling machine slurry pipe assembly, and belongs to the technical field of pipe joints. A positioning boss is arranged at the right end of the transition pipe; the left end of the transverse pipeline is inserted into the positioning boss; an arc-shaped welding boss with an arc-shaped surface is arranged at one end of the connecting joint, and an anti-abrasion inner cylinder integrated with the connecting joint is arranged on the inner side of the arc-shaped welding boss; the sealing plates are welded to the two ends of the vertical pipeline, and a plurality of fan-shaped reinforcing rib plates evenly distributed around the centers of the sealing plates are arranged on the inner sides of the sealing plates. The flange plate and the positioning boss are integrated through the transition pipe, so that the influence of welding thermal deformation on the flange surface during welding is avoided, and the hidden danger of slurry leakage is solved; the anti-abrasion inner cylinder of the connector is inserted into the five distribution holes, the effect of preventing particulate matter in slurry from abrading the inner wall of a welding seam is achieved, the sealing plate is provided with the evenly-distributed anti-abrasion reinforcing rib plates, the anti-abrasion effect on the welding seam is achieved, and welding cracking after long-time work is avoided.

Description

technical field [0001] The invention relates to the technical field of pipe joints, in particular to a mud pipe assembly of a horizontal directional drilling rig. Background technique [0002] In the construction machinery industry, mud pipes are commonly used in horizontal directional drilling at present. Due to the large amount of acidic substances and hard granular media in the mud during use, different degrees of wear will occur on the inner wall of the pipe and the weld. At the same time, there are also certain requirements for the verticality and flatness of the installation position of the flange surface connected to the mud system joint, otherwise it will cause poor sealing, resulting in leakage of mud in the pipeline and pollution. Therefore, in the design of mud The tube assembly is essential for wear protection, positioning, and preventing deformation of the connecting flange faces. [0003] A Chinese patent discloses a dredging mud pipe (CN214093534U) for water ...

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Problems solved by technology

[0005] 1. The entire implementation process of a dredging mud pipe used in water conservancy projects is only a single channel to transport mud, and the flange is directly welded to the pipe. The flange surface is easily deformed due to the influence of welding heat, which will affect the connection with the pipe after assembly. The sealing problem of the mud system affects the assembly and sealing quality;

[0006] 2. The pipe joints of the traditional mud pipe assembly for conveying mud are directly welded between the hollow structure and the arc structure matching the outer diameter of the pipe and the pipe hole. During the use, the acidic substances and hard particles in the mud There are many media, which will cause different degrees of wear on the inner wall of the pipeline and the weld, and it is prone to leakage problems

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