Preparation method of woven gas cylinder and woven gas cylinder

Abstract

The invention discloses a preparation method of a woven gas cylinder and the woven gas cylinder. The preparation method comprises the following steps that S1, an inner container with a gentle radian at an end socket is prepared; S2, a plurality of fiber layers are woven on the outer surface of the inner container, the fiber layers are evenly distributed on the outer surface of the inner container, the smooth sand phenomenon is avoided, the weaving angle of the fiber layers changes along with the radius change of the weaving portion, at the polar hole, the weaving angle is a small angle, and the distance between the axial fibers is reduced by weaving at the small angle, so that the condition that the radius at the polar hole is small is adapted, at the end socket section, the weaving angle is increased along with the increase of the radius of the weaving part, and in the cylinder body section, the weaving angle of the cylinder body section under the same fiber layer is maximum and is kept unchanged; S3, resin is poured, cured and formed; and S4, air tightness detection, grinding and polishing treatment are carried out. According to the preparation method, the weaving angle is changed along with the radius change of the weaving part, so that the fiber layers can be uniformly distributed on the outer surface of the inner container, the sand slipping phenomenon is avoided, and the gas cylinder is ensured to have enough strength and strength uniformity.

Description

technical field [0001] The invention relates to the technical field of pressure vessels, in particular to a preparation method of a braided gas cylinder and the braided gas cylinder. Background technique [0002] At present, vehicle-mounted high-pressure gaseous hydrogen storage cylinders mainly include aluminum liner fiber-wound bottles (Type III) and plastic liner fiber-wound bottles (Type IV). Long and changeable use environment and so on. Therefore, lightweight, high pressure, high hydrogen storage mass ratio and long life are the characteristics of on-board hydrogen storage cylinders. [0003] Existing pressure vessels with high-pressure bearing capacity generally use composite materials to weave pressure vessels. The composite materials are formed by compounding carbon fiber (or glass fiber, aramid fiber) and resin; pressure vessels are gas cylinders, storage tanks or shells with internal pressure. body; weaving is a two-dimensional composite material layer structure...

AI Technical Summary

Problems solved by technology

Therefore, the winding method of each layer on the surface of the container is different, and it cannot be formed at one time. It needs to be wound in batches and layers

The process is relatively complicated, and when the winding process produces the container, there will be serious problems of fiber accumulation and overhead at the pole hole of the container

[0005] The Chinese patent application publication number CN 107642678 A discloses a three-dimensional braided pressure gas cylinder and its preparation method. The outer layer of the three-dimensional braided composite material is coated on the outside of the inner layer of the gas cylinder, and the outer layer of the three-dimensional braided composite material is made of a three-dimensional braided three-dimensional fabric. The three-dimensional braided three-dimensional fabric consists of the inner layer of the three-dimensional braided composite material and the surface layer of the three-dimensional braided composite material from the inside to the outside. For suture reinforcement, the plan introduces the use of three-dimensional weaving method, but does not record the specific three-dimensional structure and its weaving method, and the three-dimensional weaving method is more complicated, and it is impossible to adopt different weaving densities for different parts of the cylinder or weave angle

[0006] The Chinese patent application publication number CN 109774195 A discloses a manufacturing method of a two-dimensional braided and sutured composite material gas cylinder. The inner tank of the gas cylinder is used as a mandrel, and the required braided layer is braided back and forth on a two-dimensional braiding machine, and stitched method to sew the prepared multi-layer braided layers into a whole. However, this plan does not mention how to weave the pole hole or the head section. There may be a problem that the braided fibers cannot be fully covered, causing the strength uniformity of the cylinder to be affected

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