CN2234027Y

CN2234027Y - Ball valve

Info

Publication number: CN2234027Y
Application number: CN 95216149
Authority: CN
Inventors: 吴仁基
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-06-27
Filing date: 1995-06-27
Publication date: 1996-08-28
Anticipated expiration: 2005-06-27

Abstract

The utility model relates to the improvement of the sealing ring of the ball surface of a ball valve. Two pieces of scraping pieces (2) which are made of hard materials are arranged on e upper surface and the lower surface of the sealing ring of the ball surface (1), and the end surfaces of the inner rings of the scraping pieces are parallel to the end surface of the inner ring of the sealing ring of the ball surface. The sealing ring of the ball surface can prevent sediments on the surface of the ball body and the solid impurities in fluid bodies from entering the seal ring of the ball surface to avoid scraping the sealing surface to cause the seal of the ball valve to be reliable, and the service life of the sealing ring of the ball surface can also be prolonged.

Description

Ball valve

The utility model relates to a kind of ball valve, especially the improvement of ball valve ball face sealing circle.

The sealing of ball valve is to realize by the ball face sealing circle that contacts with the spheroid sphere, and the ball face sealing circle generally adds filler by tetrafluoro or tetrafluoro and makes, because after ball valve work a period of time, spherome surface often deposits some hard sedimentss.During the spheroid rotation, solid impurity scratches sealing surface along with sphere contact seal face through regular meeting in rigid sediments on the sphere or the fluid, thereby causes ball valve to leak, and influences the ball valve proper functioning, need change seal ring continually simultaneously, and the dismounting inconvenience.

The utility model purpose is to provide a kind of can stop that solid impurity enters the ball face sealing circle in spherome surface sediments and the fluid, to improve the sealability of ball valve, prolongs the working life of ball face sealing circle.

Technical solutions of the utility model are to place two scraping blades of being made by hard material at ball face sealing circle upper and lower surface, and the inner ring end face of scraping blade inner ring end face and ball face sealing circle maintains an equal level, and promptly combines closely with spherome surface.When spheroid rotates, sediments on the sphere or fluid-solid impurity are stopped and can not enter sealing surface by the junction plane of seal ring and spherome surface by scraping blade earlier, thereby guarantee that seal ring can not be deposited thing or solid impurity and scratch and influence sealing, make ball valve sealing reliable, and prolong the working life of ball face sealing circle.

Further specify technology contents of the present utility model below in conjunction with embodiment and accompanying drawing thereof.

Fig. 1 is the structural representation of a kind of ball valve of embodiment.This figure reflects the position of ball face sealing circle in valve body.(1) is the ball face sealing circle among the figure, and (2) are scraping blade, and (3) are spheroid.

Fig. 2 is the ball face sealing circle embodiment's 1 of the utility model ball valve a sectional drawing.

Fig. 3 is the ball face sealing circle embodiment's 2 of the utility model ball valve a sectional drawing.

Embodiment 1, and as shown in Figure 2, two scraping blades (2) of this ball face sealing circle (1) are in the ball face sealing circle, near on the position of above and below.The inner ring end face of scraping blade inner ring end face and ball face sealing circle maintains an equal level.Scraping blade is that metallic material or hard material are made.This ball face sealing circle that contains scraping blade can be with the method integral manufacturing of pressure injection or cast, in pressure injection (or cast) mould, add the last layer stuffing box packing earlier, on the sealing filler, place a slice ring-type scraping blade, scraping blade inner ring end face and seal ring inner ring end face maintain an equal level, and then encryption packing material, put scraping blade again, place filler on the scraping blade again, pressure injection forms.

Embodiment 2, and as shown in Figure 3, two scraping blades (2) of this ball face sealing circle (1) are positioned at the position that the seal ring outside touch top and bottom.The inner ring end face of scraping blade inner ring end face and seal ring maintains an equal level.Two scraping blades are pressed on the seal ring upper and lower surface with pressing plate (4) or are fitted in other method on the position of seal ring upper and lower surface.

Claims

1, a kind of ball valve comprises the ball face sealing circle, it is characterized in that being placed with two scraping blades of being made by hard material (2) on the upper and lower surface of this ball face sealing circle (1), and the inner ring end face of scraping blade and the inner ring end face of ball face sealing circle are fair.

2, ball face sealing circle according to claim 1 is characterized in that described two scraping blades (2) are positioned at ball face sealing circle (1) near on the position of above and below.

3, ball face sealing circle according to claim 1 is characterized in that described two scraping blades (2) are positioned at ball face sealing circle (1) outside and touch on the position of top and bottom.