Vehicle ball pass test ball with visible internal mark

Abstract

The invention relates to a vehicle ball pass test ball with a visible internal mark. The vehicle ball pass test ball is characterized by comprising a solid transparent ball body, wherein an external mark is arranged at the surface of the ball body; and a metal mark is arranged at the interior center of the ball body. The ball body is made from an anti-impact type transparent polycarbonate material and integrally molded together with the metal mark by using an injection molding process. The using unit codes recorded on the external mark and the metal mark are completely consistent with sequence balls of the test balls. When the external mark at the surface of the ball body cannot be identified due to wear, internal metal mark information can be directly read by eyes; when the internal metal mark information cannot be clearly seen due to friction at the surface of the ball body, the metal mark information can be read by using an X-ray transmissometer; and when the ball body is crushed, the metal mark can be also found for identification; therefore, relevant information can be guaranteed to be found at any time, in particular when accidents are caused, so that responsibilities of the test ball using units are traced. The vehicle ball pass test ball with the visible internal mark, provided by the invention, can be widely applied to various types of railway vehicle braking tube resistance tests.

Description

technical field [0001] The invention relates to a test ball, in particular to a vehicle ball passing test ball with visible internal marks used for the resistance test of the brake pipe of a railway vehicle. Background technique [0002] The vehicle ball passing test is the first step in the single vehicle braking test of the vehicle braking system. The purpose is to check whether the main brake system of the vehicle is unimpeded. During the test, put the test ball into the brake hose connector body at one end of the vehicle, connect the bicycle tester, and make the test ball pass through the brake main pipe from the brake hose at one end of the vehicle under the action of a certain amount of compressed air. If the brake hose and the other end of the brake hose are completely inserted into the test ball receiver, the ball passing test is qualified. [0003] The existing ball used in the ball passing test is a solid nylon ball with a diameter of 25.4 mm, which has the disadv...

AI Technical Summary

Problems solved by technology

In addition, in the ball passing test, if the test ball is missed in the brake pipe system or damaged in the brake pipe system, if it is not detected in time, it will cause a driving accident.

Since the existing test balls are only numbered on the surface of the ball, it is easy to be unrecognizable due to wear and tear during use, so there is no traceability to the user unit, making it difficult to find the responsible person after an accident

There was once a general class D accident in railway traffic. The test ball blocked the train pipe and caused the brake failure of the railway freight car. Because the test ball did not have a clear mark, it was impossible to determine the relevant responsible person.

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