Pointer type safety valve

Abstract

The invention relates to a pointer type safety valve, which comprises a valve housing, wherein the opening of the valve housing is sealed by a valve cap; the valve housing is provided with a valve rod inside; the valve rod is provided with a spring outside; the spring supports against the valve cap; and the upper end of the valve rod passes through the valve cap. The safety valve is characterized in that the inner wall of the valve housing is provided with a step; the lower end of the valve rod is matched with the inner wall of the valve housing on the lower side of the step through a sealing ring; the valve rod is provided with a helical guide groove; the top surface of the valve cap is provided with a pressure dial gauge; the pressure dial gauge is provided with a movable ring; the inner wall of the movable ring is provided with a guide rib; the guide rib is matched with the helical guide groove; the outer wall of the movable ring is provided with a pointer; and the pointer points to the pressure dial gauge. The pointer type safety valve of the proposal makes use of the self structure of the valve rod to drive the pointer, makes the pointer swing with the pressure change in a drug tank and realizes that an operator can predict the pressure strength at any moment in the process of using a pressure container or a compression sprayer so as to achieve the aim of correct operation. The safety valve has the advantages of simple structure, low cost and small volume.

Description

technical field [0001] The invention relates to a safety valve, in particular to a pointer type safety valve, which is mainly suitable for a pressure vessel or a compression sprayer, and belongs to the field of valve control. Background technique [0002] Due to the development of social civilization, people's requirements for the performance of products are constantly improving, not only requiring simplicity and durability, but also energy saving and environmental protection, especially in terms of product safety. For example, pressure vessels or compressed sprayers, in order to achieve safety performance indicators, are often guaranteed by increasing the wall thickness of the product or adding a safety valve device. However, the existing safety valve only serves to prevent the container from overloading, but cannot tell the user whether there is pressure in the container, how much pressure is in the container, and whether the container is working within a safe range, becau...

AI Technical Summary

Problems solved by technology

However, the existing safety valve only serves to prevent the container from overloading, but cannot tell the user whether there is pressure in the container, how much pressure is in the container, and whether the container is working within a safe range, because frequent pressurization will cause frequent work of the safety valve. At the same time, it consumes manpower and time

So there is an independent pressure gauge installed on the pressure vessel or compressed sprayer to indicate the pressure, but the cost of the pressure gauge is relatively high

Images