Multi-functional regulable stop valve

Abstract

The invention discloses a multi-functional regulable stop valve. The multi-functional regulable stop valve provided by the invention can automatically regulate pressure and keep constant pressure and is also convenient to regulate and stop, the multi-functional regulable stop valve also has a non-return function and is very high in safety, small in starting and closing torsion, easy to disassemble and maintain and long in service life. The multi-functional regulable stop valve comprises auxiliary springs, a control ball valve and a copper pipe, wherein connected water flowing holes are formed in the middle part and the bottom of a valve rod respectively, the auxiliary springs are arranged between a regulating valve clack and the lower end surface of a lower valve cover, a water inlet hole and a water draining hole are formed in an upper valve cover, and the water inlet hole and the water draining hole are jointly used; a control room is formed between the upper valve cover and the valve rod. The design of the control room can ensure the balanced stable water pressure, when the water outlet pressure is too high, the water pressure returns into the control room through a return pipe so as to rapidly lower the water outlet pressure during the buffering of the auxiliary springs, the constant pressure effect is maintained, a water outlet of a valve body has a non-return function, when a valve is closed, a pressure measuring device or a temperature measuring device is convenient to connect, and the backflow of water is effectively prevented.

Description

technical field [0001] The invention relates to a fluid control valve, in particular to a multifunctional regulating cut-off valve. Background technique [0002] A multi-functional regulating cut-off valve, also called cut-off valve, is installed in the pipeline to control the circulation or cut-off of the medium in the pipeline, and has the function of automatic constant pressure. An existing stop valve such as a "stop valve" published on August 30, 2011 with a Chinese patent application number of 201120323526.5 includes a valve body 1, a valve disc 2, a valve stem 3, a valve cover 5, a pressure cap 8 and a hand valve. Wheel 9, the valve body 1 is provided with the inlet, outlet and valve port for medium circulation, the upper part of the valve body 1 is threadedly connected with the lower part of the valve cover 5, and a gasket is provided on the joint surface between the upper part of the valve body 1 and the lower part of the valve cover 5 4. Make the sealing of the two...

AI Technical Summary

Problems solved by technology

[0003] Although a cut-off valve with the above structure can effectively control the circulation or cut-off of the medium in the pipeline, it uses packing seals. When the valve is frequently opened and closed, the pressure cap is likely to loosen and the sealing performance will fail, that is, the pipeline is running without water and under pressure. In this case, the packing cannot be replaced, and the sealing ring can only be replaced by disassembling the gland after cutting off the pressure of the pipeline. It is very inconvenient to disassemble and replace. The replacement needs to stop the pipeline, which will affect the subsequent use needs. It is inconvenient to use and will give The user brings serious losses, and the inner seal is sealed between metal and metal, which will easily cause the sealing surface to wear out, make the inner seal lose its effect, and cause the waste of water source. The pressure water temperature function cannot keep the outlet water pressure constant, and it is easy to cause damage to water appliances and waste of water sources due to excessive water outlet pressure. Moreover, when the stop valve is slightly damaged, it is very troublesome to not be able to repair it online. Generally, it can only be replaced as a whole, which wastes resources. , can not bring good economic benefits to users

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