Safety valve of telescopic air cylinder

Abstract

The invention discloses a safety valve of a telescopic air cylinder. The safety valve is arranged in the mounting mouth of the bottom of the telescopic air cylinder and includes a safety valve bush fixed in the mounting mouth, wherein the safety valve bush is provided with a closed inner cavity, an air inlet is formed in the front end of the safety valve bush and used for communicating an inner cavity of the safety valve bush with an inner cavity of the telescopic air cylinder, an air outlet is formed in the side wall or the rear part of the safety valve and used for communicating the inner cavity of the safety valve with external environment, the inner cavity of the safety valve bush is internally and slidably matched with an air lock, an elastic part is arranged on the rear part of the air lock and used for pressurizing the head part of the air lock to block off the air inlet, and an elastic force adjusting device is arranged on the rear of the elastic part and used for adjusting elastic force of the elastic part. According to the safety valve, the defects that the air cylinder cannot control inflating volume, the air cylinder is over inflated, and thus the air cylinder is damaged is overcome, and the safety valve of the telescopic air cylinder has the characteristics that when gas in the air cylinder exceeds a certain pressure, the gas can be automatically released, the aircylinder is protected from being damaged by high pressure, movement is reliable, pressure is adjustable, the structure is simple, and safety is good.

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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