Particular kind differential screw elevation type completely plastic valve

Abstract

The invention relates to a particular kind differential screw elevation type completely plastic valve. The completely plastic valve comprises a valve body, a valve deck, a valve rod, an starting and stopping differential nut and a rotation stopping component, wherein the valve rod is inserted into the inner part of the valve body, the upper part of the valve rod is connected to the starting and stopping differential nut, the valve deck is arranged on the outer part of the valve rod and is connected to the starting and stopping differential nut; meanwhile, the valve deck is also connected to the valve body, the rotation stopping component is matched with the valve rod and is used for forcing the valve rod to maintain up and down movement but not to rotate in the starting and stopping processes of the valve. According to the particular kind differential screw elevation type completely plastic valve, the rotation stopping effect of the rotation stopping component on the valve rod is used to make the valve rod only maintain up and down movement but not rotate during the starting and stopping processes. In this way, the screw mechanism can be used to translate timely twisting force into axial force immediately, so that with a premise of reducing sharply the twisting force borne by the starting and stopping component, plasticization of the starting and stopping mechanism is achieved, and overall plasticization of the valve is further achieved. In addition, according to the particular kind differential screw elevation type completely plastic valve, the starting and stopping operations of the valve reaches an effect of being faster.

Description

technical field [0001] The invention belongs to the technical field of pipeline valve manufacturing, and in particular relates to a special differential spiral lift type all-plastic valve. Background technique [0002] The so-called plastic valves on the market are just that the valve body is made of plastic, and the internal opening and closing mechanism is still made of metal materials, and most of them are made of iron materials. As we all know, iron materials are easy to rust, which can easily lead to internal corrosion of the valve and affect the use effect. In order to solve the above-mentioned problems, there has been an opening and closing mechanism made of copper alloy, but because the price of copper alloy is relatively high, it is not conducive to large-scale use. In view of the above defects, various manufacturers proposed that the internal opening and closing mechanism of the valve is also made of plastic, but after a long period of exploration, the defect that...

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Problems solved by technology

As we all know, iron materials are easy to rust, which can easily lead to corrosion inside the valve and affect the use effect

In order to solve the above problems, an opening and closing mechanism made of copper alloy has appeared, but due to the high price of copper alloy, it is not conducive to large-scale use

In view of the above defects, various manufacturers proposed that the internal opening and closing mechanism of the valve is also made of plastic, but after a long period of exploration, the defect of the valve falling off and being damaged due to the low strength of the plastic and the inability to withstand large torsional forces has not been solved.

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