Bus low-temperature liquefied natural gas safety valve online checking force application device

Abstract

The invention relates to a bus low-temperature liquefied natural gas safety valve online checking force application device which comprises a force application mechanism, a force application bracket, aforce sensor, an adaptive valve clack lifting clamp, a shouldering type high-pressure gas cylinder, a data acquisition device and a hand-held data processing computer. The force application mechanismis connected with a safety valve by the force application bracket; the force sensor is assembled in the force application bracket; the lower end of the force sensor is connected with the adaptive valve clack lifting clamp; the upper end of the force sensor is connected with the force application mechanism; the adaptive valve clack lifting clamp is connected with a valve clack of the safety valve;the signal output end of the force sensor is connected with the hand-held data processing computer by the data acquisition device; appearance of the adaptive valve clack lifting clamp is of a compassshape; the adaptive valve clack lifting clamp comprises a chuck and two elastic clamping legs which are arranged under the chuck and are in a naturally outwards expanding state; an upwarped clampingfoot is arranged at the end part of each clamping leg; and the force application bracket is a supporting structural part for connecting the safety valve and the force application mechanism and comprises upper and lower supports and left and right struts. The bus low-temperature liquefied natural gas safety valve online checking force application device is different from conventional online checking in design thinking, is small in size, light in weight, novel in structure and convenient to operate, and successfully and perfectly implements online checking on the low-temperature non-valve-rod safety valve.

Description

technical field [0001] The invention relates to a force applying device for on-line calibration of a low-temperature liquefied natural gas safety valve of a bus. Background technique [0002] With the promotion and use of clean fuels, the use of low-temperature liquefied natural gas for vehicles in the public transportation and logistics industries is becoming more and more common. The number of cryogenic gas cylinders used as liquefied natural gas storage containers has correspondingly increased significantly. Due to the natural heat absorption and gasification of low-temperature liquefied natural gas, the physical properties of expansion and boosting, the safety function of the low-temperature safety valve installed on the cylinder of low-temperature natural gas as a pressure release device is very prominent, and it is irrelevant to the safety of any low-temperature gas cylinder. substitute role. Regular calibration at least once a year is an important measure to check w...

AI Technical Summary

Problems solved by technology

[0006] The safety valve on low-temperature LNG cylinders in the public transportation and logistics industries, taking the US REGO low-temperature safety valve with the largest market share as an example, because there is no valve stem in the structure and the valve body is small, it is impossible to quickly, safely and accurately determine the point of force application. It is safe and reliable to apply additional tension to the disc, so its online calibration has not been implemented

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