CN2265455Y

CN2265455Y - Piston type sealing device

Info

Publication number: CN2265455Y
Application number: CN 95223929
Authority: CN
Inventors: 孔祥义
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-10-26
Filing date: 1995-10-26
Publication date: 1997-10-22
Anticipated expiration: 2005-10-26

Abstract

The utility model relates to a novel piston type sealing device for inflators, water wells, and atomizers, which is mainly composed of a piston body (2) and an O-shaped ring (3). The piston body (2) is in an inclined cylindrical wine glass shape whose top and bottom diameters are the same, and middle diameter is small, and the bottom is provided with vent holes. The O-shaped ring (3) is arranged on the middle part of the piston body (2). As the sealing device contacts to a pipe wall in line, the utility model has the advantages of labor saving convenient maintenance, and long service life.

Description

A kind of novel piston formula seal arrangement

The utility model is applicable to the seal arrangement of alternative pump, setting-out Yang Jing, sprayer etc.

Used seal arrangements such as pump are in the market generally made leather cup with ox-hide or rubber, when giving gas (or liquid, down with) pressurization or decompression, expand by the little of leather cup, leather cup is closely contacted with tube wall and produce seal action.But because leather cup and tube wall are surface contact state basically, during the leather cup motion, surface friction drag is big, uses hard effort, and damages easily, and the life-span is short.Sometimes leather cup also can overturn, even comes off, and causes maintenance difficult.

The purpose of this utility model is that a kind of surface friction drag of design is little, and the time spent is laborsaving, long service life, the novel piston formula seal arrangement of convenient maintenance and replacement.

The seal arrangement of the utility model design is made up of piston body (2) and O type circle (3).The top of piston body (2) is identical with base diameter, and directly through less surface cylinder wineglass type, vent (4) is arranged at the bottom at the middle part, and O type circle (3) is installed in the middle part of piston body (2).When pull bar (1) when moving upward, O type circle (3) is slipped to the bottom of piston body (2), does not have friction substantially with tube wall; When pull bar (1) when pressing down, O type circle (3) contacts with the inclined-plane post of piston body (2), and cooperates with tube wall and to produce seal action.At this moment, O type circle (3) is the line contact condition with the friction of tube wall, so surface friction drag is little, and the time spent is laborsaving, and prolong working life, and O type circle takes out easily, so maintain and replace is also convenient.

Fig. 1 is the assembling schematic representation of pull bar and seal arrangement

(1) be pull bar, (2) are piston body, and (3) are O type circle, and (4) are the vent of piston body, and (5) are pad, and (6) are nut.

Fig. 2 is the worm's eye view of seal arrangement.

Fig. 1 also is the seal arrangement schematic representation of pump, and piston body (2) available metal or nonmetal (as plastics etc.) are by casting or Vehicle Processing manufacturing, according to the big I appropriate change of caliber vent quantity or aperture.Pull bar (1) and piston body (2) are fixing with nut (6), and O shape circle (3) is with rubber or other wear-resisting nonmetallic material manufacturing.

Claims

1, a kind of piston type seal arrangement, it is characterized in that seal arrangement is made up of piston body (2) and O type circle (3), piston body (2) is the surface cylinder wineglass type that the top is identical with base diameter, the middle part diameter is less, and vent is arranged at the bottom, and O type circle (3) is installed in the middle part of piston body (2).