Plunger Type Pneumatic Quick Change Fitting

Abstract

A plunger-type pneumatic quick-change joint, including an air inlet sleeve, a sliding sleeve spring, an air inlet sealing ring, a valve core, a locking steel ball, a moving sliding sleeve, a sliding sleeve limiter, an air outlet sealing ring and a valve core spring, A pressure relief groove is provided on the inner hole wall of the rear guide hole of the air intake joint along the circumference, and a steel ball hole is provided on the outer circle at the right end of the matching section. The locking steel ball is placed in the steel ball hole, and the air intake joint, The axial sliding limit of the valve core is controlled by the locking steel ball between the valve core and the sliding sleeve. Before the bleed air plug is inserted, the locking steel ball is located in the locking cavity; The stroke groove can ensure the non-shearing contact between the outer circle and the intake sealing ring of the valve core during the opening and closing process, ensuring that the valve core can be closed, opened easily, and has a long service life. Compared with existing similar products, it has simple structure, small radial dimension, long service life, easy insertion of bleed air plug, small pressure loss, and safe and reliable operation.

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 are an essential connection part for quick connection of gas pipelines. All industries that use compressed air need to use gas quick-connects. 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 into the inner hole of the locking sleeve and is connected with the The exhaust passages are connected, and a guide sleeve is sandwiched between the locking sleeve...

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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