Deep sea pneumatic control valve

Abstract

The invention relates to a valve, in particular to a deep sea pneumatic control valve. The specific technical scheme is that the deep sea pneumatic control valve comprises a valve body and a bonnet, a valve passage, a valve seat and a valve core are arranged in the valve body, the valve passage comprises a medium inlet passage and a medium outlet passage, a connecting chamber for communicating the medium inlet passage and the medium outlet passage is arranged between the bonnet and the valve body, a guide passage which is communicated with the connecting chamber and a pressure relief passage which is communicated with or isolated from the guide passage are arranged on the valve body, one end of the pressure relief passage is communicated with the guide passage through an adapting chamber, the other end of the pressure relief passage is communicated with the medium inlet passage of the valve body, a micro control mechanism which enables the pressure relief passage to be communicated with or isolated from the guide passage is arranged in the adapting chamber, and one end, opposite to the other end which is connected with the pressure relief passage, of the micro control mechanism, is linked with a pneumatic regulation and control mechanism above the seal level through a connecting piece. By adopting the technical scheme, the deep sea pneumatic control valve provided by the invention has the advantages that the deep sea pneumatic control valve can be used for conveniently opening and closing a seabed pipeline and the structure is simple.

Description

technical field [0001] The invention relates to a valve, in particular to a deep sea pneumatic control valve. Background technique [0002] The traditional valve is mainly composed of a valve body, a bonnet, a medium inlet channel, a medium outflow channel, and a connecting cavity connecting the medium inlet channel and the medium outflow channel on the valve body. Sealing seat, there is a valve core that can seal with the sealing seat in the connecting cavity; usually, the opening of the valve core needs to be driven by the valve stem and the driving mechanism that drives the valve stem, such as an electric actuator or a handwheel to drive the valve core, so that Only when the valve core and the sealing seat are in contact and sealed can the conduction of the medium inlet channel and the medium outflow channel on the valve body be implemented (that is, the valve body is in the open state). However, when the valve body is in a special working condition, such as the seabed, d...

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Problems solved by technology

[0002] The traditional valve is mainly composed of a valve body, a bonnet, a medium inlet channel, a medium outflow channel, and a connecting cavity connecting the medium inlet channel and the medium outflow channel on the valve body. Sealing seat, there is a valve core that can seal with the sealing seat in the connecting cavity; usually, the opening of the valve core needs to be driven by the valve stem and the driving mechanism that drives the valve stem, such as an electric actuator or a handwheel to drive the valve core, so that Only when the valve core and the sealing seat are in contact and sealed can the conduction of the medium inlet channel and the medium outflow channel on the valve body be implemented (that is, the valve body is in the open state). However, when the valve body is in a special working condition, such as the seabed, due to The pressure on the seabed prevents the valve from opening normally. For example, the process of opening or closing it manually is cumbersome, and the process of opening or closing it is slow and time-consuming. When an emergency occurs in the seabed pipeline, The valve cannot be closed in time, causing energy leakage and polluting the environment

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