A kind of preparation method of braided gas cylinder and braided gas cylinder

Abstract

The invention discloses a preparation method of a braided gas cylinder and a braided gas cylinder, comprising the following steps: 1. preparing an inner bladder with a gentle curvature at the head; 2. weaving several layers of fiber layers on the outer surface of the inner bladder, and the fiber layers are evenly covered There is no sand sliding phenomenon on the outer surface of the inner tank, and the weaving angle of the fiber layer changes with the radius of the weaving part; at the pole hole, the weaving angle is a small angle, and the weaving at a small angle makes the distance between the axial fibers change. It is suitable for the small radius of the pole hole; in the head section, the weaving angle increases with the increase of the radius of the braided part; in the barrel section, the weaving angle of the barrel section under the same fiber layer is the largest and remains unchanged; 3 4. Carry out air tightness detection, grinding and polishing treatment; the braiding angle of the present invention changes with the change of the radius of the braided part, so that the fiber layer can be evenly distributed on the outer surface of the inner tank without slipping. The sand phenomenon ensures that the cylinder has sufficient strength and uniformity of strength.

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 a braided gas cylinder. Background technique [0002] At present, vehicle-mounted high-pressure gaseous hydrogen storage cylinders mainly include aluminum-lined filament-wound bottles (type III) and plastic-lined fibrous-wound bottles (type IV). Features such as length and changeable environment. Therefore, lightweight, high pressure, high hydrogen storage mass ratio and long life are the characteristics of vehicle-mounted hydrogen storage cylinders. [0003] Existing pressure vessels with high pressure bearing capacity generally use composite materials woven pressure vessels, and the composite materials are formed by compounding carbon fibers (or glass fibers, aramid fibers) and resins; Body; weaving is a two-dimensional composite material layer structure formed by carbon fiber bundles (or glass fiber bundles, aramid ...

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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