Alarm device for returning and connecting loading and unloading swing arm in place

Abstract

The invention relates to an alarm device for returning and connecting a loading and unloading swing arm in place. A self-loop of an electrostatic releaser is a first electrostatic loop; the electrostatic releaser and a tank truck form a second electrostatic loop through a grounding wire; the first electrostatic loop is switched to trigger a first annunciator to send a signal to a controller; the second electrostatic loop is switched on to trigger a second annunciator to send a signal to the controller; when a swing arm is connected with a feeding connector of the tank truck in place, a third annunciator is triggered to send a signal to the controller; the swing arm returns in place, and a fourth annunciator is triggered to send a signal to the controller; an alarm is arranged in a workingloop of an electromagnetic relay KA1 and is a normally closed loop; and when the controller receives signals sent by the first annunciator or the second annunciator and receives signals sent by the third annunciator or the fourth annunciator at the same time, the alarm does not give an alarm. According to the technical scheme, only one electromagnetic relay is adopted to achieve the dual alarm function that the swing arm does not return or is not connected in place, and complex requirements are met through a simple structure.

Description

technical field [0001] The invention relates to the technical field of chemical production safety, in particular to an alarm device for returning and connecting a loading and unloading crane pipe to a position. Background technique [0002] In my country's chemical production industry, crane pipes are generally used for loading and unloading fluid materials such as gasoline to realize the transmission of fluid media between trains, automobiles, ships, etc. and storage and transportation pipelines. They have the characteristics of high safety, high flexibility, and long life. [0003] When crane tubes are used to load and unload materials, if the crane tubes do not return to their proper positions, it is very easy to move abnormally under the action of external forces (wind, personnel or vehicle misoperation), which may cause the crane tubes to break due to their own gravity or collide with the on-site vehicles , thus causing safety accidents; if the crane pipe is not connect...

AI Technical Summary

Problems solved by technology

[0004] At present, there is no device in China that can realize the double alarm system of the crane tube connecting in place and returning to the position. Therefore, it is necessary to design the crane tube with the returning in place and connecting in place alarm devices.

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