Plunger type pneumatic quick change coupler

Abstract

The invention discloses a plunger type pneumatic quick change coupler. The plunger type pneumatic quick change coupler comprises an air inlet connecting sleeve, an air inlet seal ring, a sealing check ring, a valve core, locking steel balls, a movable sliding sleeve, an axial check ring, an air outlet seal ring, a valve core spring and a sliding sleeve spring, wherein the air inlet connecting sleeve has a sleeve structure; the valve core has a stepped axial sleeve structure and is sleeved in an inner hole of the air inlet connecting sleeve; both the air inlet seal ring and the sealing check ring are sleeved in a valve core sliding hole of the air inlet connecting sleeve; the air outlet seal ring is arranged in an air outlet seal groove; the valve core spring is sleeved on axle diameter of a left section of the valve core; the locking steel balls are arranged in locking steel ball holes of the air inlet connecting sleeve; the sliding sleeve spring is sleeved on a matching outer circle of a right section of the air inlet connecting sleeve; and the axial check ring is clamped in an axial check ring groove. In the plunger type pneumatic quick change coupler, only three main body parts, namely the air inlet connecting sleeve, the valve core and the movable sliding sleeve, and two sealing processes are adopted; and compared with the conventional similar products, the plunger type pneumatic quick change coupler has the advantages of simple structure, small size, convenience for disassembly and assembly and long service life.

Description

Technical field: [0001] The invention relates to a pneumatic quick-change joint, which is widely used for quick connection of gas delivery pipelines. Background technique: [0002] Pneumatic quick change joints, as an essential connection part for quick connection of gas pipelines, are widely used in various fields, such as automobile repair, machine assembly, engineering construction, mechanical processing, packaging and other industries. All industries that use compressed air need to use gas quick connector. In Chinese patent CN101907210A (Patent No. ZL201010234636.4) discloses "a pneumatic quick joint, which includes a female joint connected to the air inlet pipe and a male joint connected to the air outlet pipe, and is fixedly installed at the air outlet end of the female joint. There is a locking sleeve, and a check valve core with an exhaust channel is installed in the inner hole of the female joint and the locking sleeve. The air inlet end of the male joint extends i...

AI Technical Summary

Problems solved by technology

The pneumatic quick change joint of this structure consists of a female joint, an outer sealing ring, a check valve core, an inner sealing ring, a steel ball, a male joint, a guide sleeve, a Y-shaped sealing ring, a valve core spring, an outer casing spring, an outer casing and a locking The sleeve is composed of many parts and complex structure. It is difficult to process the sealing groove on the guide sleeve and the male joint, and it is difficult to assemble the three seals. Although there are many sealing links, there is no sealing structure between the inner hole of the female joint and the outer circle of the guide sleeve. The O seal ring installed at the front end is easily sheared and damaged during the left and right movement, resulting in unsatisfactory overall sealing effect and short service life. At the same time, the radial dimension is relatively large, which is difficult to meet the user's requirements for small-volume pneumatic quick-change joints. Requirements, the disassembly and assembly between the female joint and the locking sleeve is realized through the outer hexagon, which further increases the radial dimension of the part, making the geometric dimension of the part unable to be reduced, and the material consumption is large

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