Hot winding solid corrugated pipe, sectional material thereof and manufacturing method thereof

Abstract

The invention relates to a hot winding solid corrugated pipe, and a sectional material and manufacturing method thereof. The sectional material of the hot winding solid corrugated pipe comprises a first sectional material and a second sectional material; the first sectional material comprises a supporting rib and a first hot coating layer; the first sectional material comprises a connecting strip,a first half wave crest strip and a second half wave crest strip; the second sectional material comprises a buckle plate and a second hot coating layer; a buckling groove is formed in the middle partof the second sectional material; and the shape and size of the buckling groove are matched with the shape and size of the outer wall of a small wave crest structure formed by splicing the first halfwave crest strip and the second half wave crest strip. The sectional material adopts the first sectional material and the second sectional material which are solid wall structures, and the sectionalmaterial can facilitate the cooling forming of a pipe, the production speed of the pipe is increased and the welding quality of the pipe can be improved. The solid corrugated pipe is of a solid wall structure, and is high in ring stiffness, good in impact resistance and destruction resistance, and excellent in ring flexibility. The manufacturing method of the corrugated pipe adopts hot winding tocompound all units together, the welding strength is high and the residual stress problem basically does not exist.

Description

Technical field [0001] The invention relates to the field of pipe materials, in particular to a hot-wound solid corrugated pipe and its profile and a manufacturing method thereof. Background technique [0002] At present, the pipe materials in the fields of drainage and sewage are generally steel-plastic composite spiral corrugated pipe and HDPE double-wall corrugated pipe. Among them, the steel-plastic composite spiral corrugated pipe has the following shortcomings: 1. The adhesion between steel and plastic is poor, and it is in the process of processing. , The steel belt has great internal stress. After the pipe is placed outdoors for a certain period of time, due to thermal expansion and contraction and other factors, the steel and plastic are severely separated, resulting in a serious decrease in the ring stiffness of the pipe after being buried in the ground , Causing engineering accidents; 2. Due to the poor corrosion resistance of the steel belt, it is easy to cause corros...

AI Technical Summary

Problems solved by technology

[0002] At present, the pipes in the fields of drainage and sewage are generally steel-plastic composite spiral corrugated pipes and HDPE double-wall corrugated pipes. Among them, the steel-plastic composite spiral corrugated pipes have the following disadvantages: 1. The adhesion between steel and plastic is poor. , there is a huge internal stress in the steel strip, which causes serious separation of steel and plastic due to factors such as thermal expansion and contraction after the pipe is placed outdoors for a certain period of time, resulting in a serious decrease in the ring stiffness of the pipe after it is buried , causing engineering accidents; 2. Due to the poor corrosion resistance of the steel strip, it is easy to cause corrosion of the steel strip during production and construction, thereby damaging the pipe and causing engineering accidents; 3. The impact performance is poor, and the steel-plastic composite pipe is subjected to external forces. When impacted, steel and plastic are prone to delamination; 4. Poor damage resistance. The wave crest of the pipe is a single wave crest structure. As long as the wave crest is damaged by external force, water or foreign matter will enter the wave cavity, corrode the steel strip and damage the inner core. layer, eventually causing the overall damage of the pipe

[0003] HDPE double-wall corrugated pipe has the following disadvantages: 1. The peak of the pipe is a single layer and a single peak structure, while the inner and outer walls are thinner, the entire wave is hollow, and the impact resistance and damage resistance are poor; 2. Because the wave crest is a single layer and has a single wave peak structure, the compressive performance of the pipe is poor, so the overall ring stiffness is low, generally not exceeding 8kN / m 2 , if it is necessary to increase the ring stiffness, it is necessary to greatly increase the amount of unit material, and the cost is high; 3. The investment in production equipment is high, generally more than 8 times that of threaded bellows equipment. High cost; at the same time, due to technical limitations, it is currently impossible to produce pipes with a diameter exceeding 1500mm

[0004] In addition, the production method of this kind of pipe is cumbersome, the process operation is complicated, and the product quality stability is poor; the material requirements are high, the material selection range is narrow, and a slight fluctuation of the material will bring serious product quality hidden dangers, and even the product is scrapped, and the production cost is high. High; equipment safety is poor. Because the equipment adopts continuous and uninterrupted extrusion design, the speed matching of each main and auxiliary is very important. A slight speed difference will cause insufficient wall thickness of the product, but it cannot be detected, which has buried a serious problem for engineering applications. Great potential safety hazard; in addition, due to the continuous and uninterrupted extrusion design of the equipment, there are many rotating parts in each link. A little carelessness may cause serious safety accidents and bring hidden dangers to property and personal safety.

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