Unloading one-way valve of air compressor

Abstract

This invention is a kind of unloading one-way valve of compressor. It includes valve body and air intake pipe joint; air intake cavity and working cavity inside of valve body; air intake cavity communicates with air intake joint; the upside of air intake cavity is arranged with washer and rubber pressing sealing piece. The rubber-pressing sealing piece has down-convex cone-shaped rubber sealing hoop; the washer has unloading opening; there are spool and dish-shaped rubber sealing piece inside of working cavity; the connecting rod, which cuts through dish-shaped rubber sealing piece, air intake cavity, rubber pressing sealing piece and washer in turn and protrudes out of unloading opening, is connected with spool; the upper end face of working cavity is set with sealing convex ring. The working cavity torus has ventilating groove and air intake groove; the connecting rod has air-discharging groove. There is spacing piece at the top end of connecting rod. This invention can automatically control compressor to feed air in one way. When the machine is stop, the compressor is automatically unloaded.

Description

Technical field [0001] The invention relates to an engineering element and a component, in particular to a component on an air compressor, in particular to an unloading check valve of an air compressor. Background technique [0002] At present, the displacement of 1m at home and abroad 3 The dynamic drag type medium and micro air compressor below / min usually adopts an automatic air pressure switch to control and adjust the discharge pressure. When the rated pressure is reached, the motor can automatically stop running under the control of the air pressure switch, exceeding the pressure difference of the air pressure switch The range can be automatically activated again. It seems to be energy-saving, but it can’t, because: 1. Frequent starting, the motor starting current is very large; 2. In order to overcome the natural pressure difference of the air pressure switch, the compressor discharge pressure must exceed the minimum required pressure of the equipment by 0.25-035 / MPa. And...

AI Technical Summary

Problems solved by technology

[0004] However, the applicant believes that the existing unloading check valves, including the above-mentioned slide valve unloading check valves for air compressors, have a relatively complicated structure and many components. In addition to the check valve, there are auxiliary The connection between the copper conduit and the mechanical lever switch is complicated, and the second is that the function is single, which can only control the flow of air in one direction. When the air pressure reaches the upper limit, it can be vented through the mechanical lever switch.

Third, the manufacturing and maintenance costs are high. Fourth, when the abnormal shutdown pressure does not reach the upper limit, the compressed air connected from the compressor cylinder to the one-way valve cannot be discharged. damage to the motor and compressor

Images