Safety valve of telescopic cylinder

Abstract

The invention discloses a safety valve of a telescopic cylinder. The safety valve is arranged in a mounting port at the bottom of the telescopic cylinder and comprises a safety valve sleeve fixed in the mounting port; the safety valve sleeve is provided with a sealed inner cavity; an air inlet which is used for communicating the inner cavity of the safety valve sleeve with the inner cavity of the telescopic cylinder is arranged at the front end of the safety valve sleeve; an air outlet which is used for communicating the inner cavity of the safety valve sleeve with the external environment is arranged at the sidewall or the back part of the safety valve sleeve; an air plug is arranged in the inner cavity of the safety valve sleeve in a sliding fit manner; an elastic piece which is used for making the head part of the air plug support, press and block the air inlet is arranged at the back part of the air plug; and an elasticity adjusting device which is used for adjusting the elasticity of the elastic piece is arranged behind the elastic piece. Aiming at the disadvantage that the cylinder is excessively inflated to lead to cylinder damage as inflation amount for the cylinder cannot be controlled, the invention provides the safety valve of the telescopic cylinder safety valve, and the safety valve can be used for automatically releasing gas when the gas pressure in the cylinder exceeds a certain pressure and protecting the cylinder from high-pressure damage, and has the advantages of reliable action, adjustable pressure, simple structure and good safety.

Description

technical field [0001] The invention relates to a safety device for a telescopic cylinder, in particular to a safety valve for a telescopic cylinder. Background technique [0002] The telescopic cylinder is a common lifting device widely used in many fields. In the field of lighting technology, telescopic cylinders are often used as telescopic light poles in outdoor lighting fixtures, especially for temporary outdoor large-area night lighting. It is often seen that workers raise the light poles to support the lamps for lighting operations. . However, the lifting of the telescopic cylinder is to continuously inflate the cylinders through the electric air pump to raise the cylinders one by one, but when the cylinders rise to the limit height, if the electric air pump does not stop inflating, the seals of the cylinders may be damaged, or The resulting air flying off damages the lamps, causing the separation between multi-stage cylinders, and the flying light poles or cylinder...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method that can automatically release the gas when the gas in the cylinder exceeds a certain pressure, and can protect the cylinder from being damaged due to the inability to control the amount of gas in the prior art. Damaged by high pressure, reliable action, adjustable pressure, simple structure, good safety telescopic cylinder safety valve

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