A Pneumatic Delay Reversing Valve

Abstract

The invention discloses a pneumatic delay reversing valve. The pneumatic delay reversing valve comprises a valve body, a valve element and a spring. An air containing chamber is arranged at one end of the valve body, and a stepped valve element cavity is formed in the other end of the valve body. The valve element and the spring are coaxially arranged in the valve element cavity. A through hole is formed between the air containing chamber and the valve element cavity. A throttling valve, a check valve and a miniature throttling valve are arranged at the upper end of the valve body and further communicate with the air containing chamber. An outlet of the miniature throttling valve is connected with a valve body exhaust end opening. A control end opening, an air inlet end opening, an air outlet end opening and an unloading end opening are sequentially formed in the lower portion of the valve element cavity. The valve element is a stepped cylinder with at least two grooves formed in the radial direction. In the initiating / starting process, the air outlet end opening and the air inlet end opening are located in the same groove. In the closing process, the air outlet end opening and the air inlet end opening are located in the adjacent grooves. The pneumatic delay reversing valve has the advantages that the structure is simple and compact, the weight is low, performance is good, the process is simple and easy to implement, an existing pneumatic delay reversing valve can be refitted conveniently, and the technical requirements of products produced can be met.

Description

technical field [0001] The invention relates to a valve, in particular to a pneumatic time-delay reversing valve. Background technique [0002] The time-delay reversing valve is mainly used to control the reversing frequency and on-off time ratio of gas. At present, the commonly used control methods of the delay reversing valve are as follows: electromagnetic control, air pressure control, manual control and mechanical control. These control methods currently have certain technical problems: the delay reversing valve of electromagnetic control An external power supply is required; the manual control delay reversing valve is too low in automation, it is difficult to accurately control the delay time, and the frequency of use is low, and the action speed is slow; the mechanical control delay reversing valve is usually too complicated in structure and reliable. The performance is not high; and the most widely used air pressure control delay reversing valve has the defect that ...

AI Technical Summary

Problems solved by technology

At present, the commonly used control methods of the delay reversing valve are as follows: electromagnetic control, air pressure control, manual control and mechanical control. These control methods currently have certain technical problems: the delay reversing valve of electromagnetic control An external power supply is required; the manual control delay reversing valve is too low in automation, it is difficult to accurately control the delay time, and the frequency of use is low, and the action speed is slow; the mechanical control delay reversing valve is usually too complicated in structure and reliable. The performance is not high; and the most widely used air pressure control delay reversing valve has the defect that the delay adjustable range is small, generally within one minute.

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