Air inlet valve

Abstract

The invention provides an air inlet valve which comprises a valve body, a valve body cavity, an air inlet valve element, an air cylinder, an air source control valve and an online control valve. An air inlet of the air source control valve is connected with an air source inlet. A first air outlet of the air source control valve, a first air flow path and the air cylinder are communicated in sequence. A second air flow path is connected between the air source inlet and the air cylinder. The valve body cavity comprises a first drive cavity commutating with the air cylinder and a second drive cavity connected with a second air outlet of the air source control valve. The online control valve comprises the first air flow path and the second air flow path. When a compressor is in unit operationor grid-connected operation, the first air flow path is opened or closed, and the second air flow path is closed or opened. The structure is simple, and operation is easy; the online control valve isadditionally arranged, the first air flow path can be selected to be opened when the compressor is in unit operation so that the air inlet quantity can be adjusted; when the compressor is in grid-connected operation, the second air flow path can be selected to be opened so that the air inlet valve can achieve continuous air inputting, forced loading is carried out on the compressor, and repeated loading and unloading are avoided; and safety and reliability are achieved, and cost is low.

Description

technical field [0001] The invention belongs to the technical field of compressors, and in particular relates to an intake valve. Background technique [0002] The main purpose of on-line control is to control the operation status of each compressor in the compressor group to meet the user's demand for gas consumption. The ideal state is that one compressor in the compressor group is in the adjustment state and the other compressors are in the forced loading state. [0003] Existing intake valves often include a valve body and an air source control valve. A valve body cavity is arranged in the valve body, and both ends of the valve body cavity are opened. An air inlet valve core is arranged between the air inlet end and the air outlet end of the body cavity, and the valve body cavity includes a first drive chamber and a second drive chamber, and one end of the air source control valve communicates with the first drive chamber to control the air source Enter the first drive ...

AI Technical Summary

Problems solved by technology

[0003] Existing intake valves often include a valve body and an air source control valve. A valve body cavity is arranged in the valve body, and both ends of the valve body cavity are opened. An air inlet valve core is provided between the air inlet end and the air outlet end of the body cavity. The valve body cavity includes a first drive chamber and a second drive chamber. One end of the air source control valve communicates with the first drive chamber to control the air source. Enter the first drive chamber through the air source control valve to drive the intake valve core to move to increase the opening, and the other end of the air source control valve is connected with the second drive chamber so that the control air source enters the second drive chamber through the air source control valve The cavity drives the intake valve core to move to reduce the opening until it is closed. The air source control valve is connected to the first drive cavity and the second drive cavity; it has the disadvantage that it cannot be forced to load. If the compressor uses this intake valve, it will When the compressor is integrated into the compressor pipe network for operation, the forced loading operation in the online state cannot be realized when the gas demand of the pipe network is needed, and the continuous control of the displacement of the compressor cannot be realized. An additional host computer is required to control each compressor. The machine is loaded and unloaded repeatedly, easy to wear and tear

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