Over-flow checking table of emergency cut-off valve

Abstract

The invention discloses an over-flow checking table of an emergency cut-off valve. The structural characteristics of the over-flow checking table are as follows: a water pump is connected at the lower part of a water tank by a pipeline, and the pipeline is connected at the other end of the water pump; an electromagnetic flow rate meter, a pressure meter, an overflow valve, a stop valve and the detected emergency cut-off valve are sequentially connected on the pipeline; the other end of the overflow valve is connected with the water tank, the tail end of the pipeline is inserted into the upper part of the water tank, and a network paper-less recorder with the functions of measuring, displaying, storing and the like is connected on the electromagnetic flow rate meter. The checking table not only can accurately check out technical performance indexes of the emergency cut-off valve when the emergency cut-off valve is taken out of a factory, but also can periodically check the over-flow protecting function of the emergency cut-off valve, so as to ensure product quality and using function of the valve and to avoid safety accidents, thereby ensuring safety of a railway tank vehicle in the transportation process of liquefied gas. The checking table is safe, reliable, economical and friendly to the environment. Moreover, the checking table also has the following characteristics: the structure is simple, the using is convenient, and water replaces a dangerous medium.

Description

1. Technical field [0001] The invention relates to a valve flow checking and calibrating device, in particular to an emergency shut-off valve overflow checking and calibrating platform. 2. Background technology [0002] In recent years, during the transportation of liquefied gas by railway tank cars, incidents of medium leakage due to the structure, setting and connection methods of tank car safety accessories have occurred from time to time, causing safety hazards to railway transportation. In order to effectively solve the safety hazards of railway tank cars and ensure the safety of railway tank cars in the process of transporting liquefied gas, the liquid phase emergency shut-off valve of railway tank cars has been modified so that the liquid phase emergency shut-off valve must have the function of overcurrent limitation. When the medium flow rate is too fast or the medium flow rate exceeds the standard flow rate due to pipeline damage, the floating disc of the emergency ...

AI Technical Summary

Problems solved by technology

At present, there is no inspection and calibration device for detecting whether the maximum flow rate of the floating disc of the emergency shut-off valve exceeds the standard flow rate stipulated by the state, and it is impossible to perform technical index performance inspections and regular inspections during use of the emergency shut-off valves when they leave the factory. The overcurrent protection function of the emergency cut-off valve cannot guarantee the product quality and use function of the valve, and it is still prone to safety accidents

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