Special-shaped insulation wear-resistant sand spraying rubber flexible pipe

Abstract

The invention discloses a special-shaped insulation wear-resistant sand spraying rubber flexible pipe. The flexible pipe is composed of an inner rubber layer, a reinforcing layer and an outer rubber layer; the inner rubber layer and the outer rubber layer are made of rubber with good insulation, wear resistance, weather resistance and low-temperature soft performance; the reinforcing layer is madeof fiber materials such as aramid fibers, polyester and vinylon by using winding, knitting or weaving process; the special-shaped sand spraying rubber flexible pipe comprises a first straight pipe section, a second straight pipe section, a third straight pipe section, a first arc section which connects the first straight pipe section and the second straight pipe section and a second arc section which connects the second straight pipe section and the third straight pipe section; the first straight pipe section and the second straight pipe section are correspondingly tangent to the first arc section; and the second straight pipe section and the third straight pipe section are correspondingly tangent to the second arc section. According to the special-shaped insulation wear-resistant sand spraying rubber flexible pipe, the axial twisting force caused by the straight pipe state is effectively avoided, and the rigid pulling force of a rubber pipe and a joint is relieved; and meanwhile, theinstallation direction of the rubber pipe is identified, the installation operation is standardized, and the operation failure rate is effectively reduced.

Description

technical field [0001] The invention belongs to the field of rubber hoses for high-speed EMUs, and relates to a special-shaped insulating wear-resistant sand-scattering rubber hose. Background technique [0002] With the continuous advancement of science and technology, the means of transportation are becoming more and more diversified and the speed is getting faster and faster. Among them, high-speed bullet trains have become the preferred means of transportation for people to travel because of their fast and convenient advantages. The braking safety performance of high-speed trains is more important. The sanding device is a device that sands the track in front of the wheel during braking to increase the friction coefficient between the wheel and the rail, thereby enhancing the braking effect. The device can also sprinkle sand when starting or going uphill to suppress idling and sliding, improve the adhesion traction, effectively prevent the slipping phenomenon of the movin...

AI Technical Summary

Problems solved by technology

[0004] At present, the sand spreading rubber hoses of the sand spreading devices on the market are all straight pipes, which are hard-connected to the sand box. When the vehicle is running, the rubber hoses are bent, stretched, and stressed, which creates a strong pull on the connecting devices at both ends of the straight pipes. In severe cases, the end joints will fall off, which will affect the driving safety performance of the locomotive

In addition, when the straight sand-sprinkling pipe changes from a bent state to a straightened state during operation, an axial twisting force will be generated, which will increase the stress on the pipe body and have an adverse effect on the connection at both ends, thereby increasing the number of locomotive operating failures.

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