Automatic unloading one-way valve of air compressor

Abstract

An automatic unloading holding valve of an air compressor comprises a valve body, a gas intake cavity and a working cavity, a sealing element, an unloading port, a connecting rod, a valve core, an unloading gas groove, an intake groove and a spring power-assisted element. The gas intake cavity and the working cavity are arranged in the valve body from top to bottom and are communicated with each other. The sealing element is arranged at one side of the opening place of the intake cavity; the center of the sealing element is opened with a center hole, the wall of which is provided with the unloading port; The connecting rod is positioned and can play in the intake cavity. One end of the connecting rod extends to the working cavity and a sealing element and the valve core are arranged which can close or open the channel between the intake cavity and the working cavity. The other end of the connecting rod extends to outside through the center hole of the sealing element. The gas unloading groove is arranged on the connecting rod and a plurality of the gas intake grooves are positioned on the inner-wall of the working cavity. The spring power-assisted element can drive the valve core, the sealing element to move synchronously with the connecting rod. The invention has the advantages of automatic controlling the air compressor to feed and stop gas at one direction, automatic unloading the compressor to the compressed air to the channel of the invention when the power is cut to ensure that the motor and the compressor are not affected by the air pressure loading effect, easy to restart and continue working.

Description

technical field [0001] The invention relates to an engineering element and component, in particular to a component on an air compressor, in particular to an automatic unloading check valve of the air compressor. Background technique [0002] At present, the displacement of 1m at home and abroad 3 The drag-type medium and small air compressors below / min usually use an automatic air pressure switch to control and adjust the exhaust pressure. When the rated pressure is reached, the motor can automatically stop running under the control of the air pressure switch, and the pressure difference exceeding the air pressure switch The scope can be started automatically again. It seems to be energy-saving, but it is not, 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 exhaust pressure of the compressor must exceed the minimum required pressure of the equipment by 0.25-0.35...

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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 valves. The connection between the copper conduit and the mechanical lever switch is complicated; the second is that the function is single, and the airflow can only be controlled to flow in one direction, and the air pressure can only be vented through the mechanical lever switch when the air pressure reaches the upper limit; the third is that the manufacturing and maintenance costs are high; When the upper limit is not reached, the compressed air connected from the compressor cylinder to the one-way valve cannot be discharged. If it is necessary to restart the machine, it must be manually operated to release the air. If it is not handled properly, the motor and compressor will be damaged.

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