Plunger pneumatic quick-change coupler

Abstract

The invention discloses a plunger pneumatic quick-change coupler. The plunger pneumatic quick-change coupler comprises an air inlet connecting sleeve, a sliding sleeve spring, an air inlet sealing ring, a valve core, a locking steel ball, a mobile sliding sleeve, a sliding sleeve limit component, an air outlet sealing ring and a valve core spring, wherein a pressure release groove is axially formed on an inner hole wall of a matching section of the air inlet connecting sleeve; a locking steel ball hole is formed on the excircle of the right end of the matching section; the locking steel ball is arranged in the locking steel ball hole; the relative axial slide limit among the air inlet connecting sleeve, the valve core and the mobile sliding sleeve is controlled by the locking steel ball; and before an air entraining plug (Plug) is inserted, the locking steel ball is positioned in a locking cavity. A smooth grinding undercut is formed on a matching excircle of the valve core, so shear-free contact between the matching excircle and the air inlet sealing ring in the opening and closing process of the valve core can be ensured, the valve core can be ensured to be closed and opened without difficulty, and the service life of the plunger pneumatic quick-change coupler is long. Compared with like products, the plunger pneumatic quick-change coupler has a simple structure and smaller radial size, and the air entraining plug (Plug) is easy to insert and cannot fall off accidentally, so the plunger pneumatic quick-change coupler is safe and reliable.

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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