CN2260928Y

CN2260928Y - Spherical strong-sealed valve

Info

Publication number: CN2260928Y
Application number: CN 96235650
Authority: CN
Inventors: 洪胜
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-04-11
Filing date: 1996-04-11
Publication date: 1997-08-27
Anticipated expiration: 2006-04-11

Abstract

The utility model relates to a high sealed valve, comprising a valve body, a spherical body, valve rod, a rubber valve seat, etc. The utility model is characterized in that the rubber valve seat and the spherical surface of the spherical body is sealed by step circular holes on the valve seat, and two step openings are simultaneously contacted with the spherical body. Consequently, two layers of line contact sealing are realized. A pull wire which is connected with an upper rod is arranged on the valve rod, the pull wire is lifted, and the valve is opened. The valve has good sealing performance, long service life, and reliable work. The technological problem of water leakage of the traditional valve is thoroughly overcome.

Description

The highly dense valve of sphere

The utility model relates to the ball face sealing mechanism of valve.

Present family and factory valve, particularly water tap commonly used, " run, drip, leak " phenomenon is very general.Not only cause waste, and bring various troubles.Because the valve numbers of poles is many, it is very surprising to add up loss.Existing running water valve is mainly extruding type and sphere driving fit formula.Wherein the closure member of extruding type valve moves along the valve seat center line is upper and lower, relies on the pressure of threaded stem rotation, and the sealing rubber pad and the valve seat planes of closure member fitted tightly.This sealing means makes rubber pad be in the rotation and the state that is squeezed, and rubber pad is easy to damage and makes seal failure.Existing ball valve or sphere driving fit also all make valve open by rotary spool or close, and still there is the effect of rotation and extruding in the face that is sealed and matched.Existing sphere driving fit is to realize sealing by sphere or diatom contact between spheroid and valve seat.Owing to always have the gap between the sealing surface, and have only potted line one, so water leakage phenomenon is inevitable.When having only one potted line, the sealing position must be born very heavy, and rubber base very easily is damaged.So existing this class life of valve is very short, and causes easily and be not closed completely and leak, the parts that need often maintenance and more renew.In addition, the spheroid and the valve rod of existing ball valve all are fixedly connected, can not be movable relatively, and therefore very high to whole valve accuracy of manufacturing requirement, there is deviation will cause leakage slightly.

The purpose of this utility model is the above-mentioned difficulties that will overcome prior art, and provides a kind of good sealing effect, the sphere driving fit valve that bearing capacity is strong.

Solution of the present utility model comprises valve body, spheroid, valve rod and rubber valve seat etc., the sphere driving fit that it is characterized in that said rubber valve seat and spheroid is by the step circular hole on the valve seat, all keep in touch with spheroid simultaneously in two step apertures, thereby realize the twice line contact sealing; There is backguy to link to each other on the valve rod, mentions backguy and spheroid and can open valve with upper boom

Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing.

Fig. 1 is the longitudinal sectional drawing of highly dense valve.

Referring to accompanying drawing, in valve body 6, realize being sealed and matched by stainless steel spheroid 4 and flexible rubber valve seat 5.On valve seat 5, have stepped shape circular hole 8.Wherein less step aperture contacts with the spheroid bottom, and bigger step aperture contacts with spheroid top.Valve seat is to contact by the twice round wire with the driving fit of spheroid like this.Not only realize easily on the technology, and strengthened the reliability of sealing greatly, and can reduce the load on the per pass rubber seal line.Scheming short-and-medium valve rod 3 is screwed in the steel ball 4 by screw thread.Be that backguy 2 is arranged on the valve rod 3, backguy links to each other with upper boom 1 again, acts on upper boom and just can start the upper and lower motion of steel ball.Steel ball sealed by the pressure and the rubber valve seat of weight own and water when upper boom fell.Among the figure, rubber valve seat 5 is pressed in the valve body 1, and firm by special glue and valve body bonding, can not leak.Used rubber is non-toxic sanitary rubber, and enough hardness and wear resistance are arranged.The rubber softness is yielding, cooperates with hard steel ball to obtain very high sealability.Spheroid 4 also can adopt copper ball or nylon ball etc.And the form that can adopt hemisphere is to save material.

Soft nylon rope or Stainless Steel Wire are preferably adopted in backguy 2 between valve rod 3 and the upper boom 1, so that steel ball can be sought the valve seat center automatically.When upper boom 1 moves upward, affect valve rod and spheroid 4 to lift off a seat valve open by backguy 2.When upper boom 1 moved downward, steel ball fell in the step circular hole valve closing automatically because of the effect of gravity and water pressure.The spheroid of this valve need rely on gravity work, when therefore installing, must be in vertical.

In order to protect the degree of finish of steel ball, the plastics protective housing 7 of band concave spherical surface is housed above valve body 6 interior spheroids 4, impaired to prevent installing and transport middle steel ball.Concave spherical surface on the protective housing and spheroid 4 adapt.

Highly dense valve is widely used in water supply pipe and other low pressure pipeline, particularly water closet etc., all has good water-saving result.

The utility model is compared with traditional ball valve, has following advantage:

1. there are two diatoms to contact between steel ball and the rubber seal seat, greatly improved sealing property, Thoroughly overcome valve this old technical barrier that leaks.

2. steel ball is that flexible cord connects with upper boom, is convenient to steel ball from alignment, is in all the time step In the hole, keep the tram, reliable operation.

3. the contacting point of steel ball and rubber seal does not have Mo Chali, only is subjected to the pressure of gravity and water, and tripping force is little, and it is little to wear and tear, so life of valve is long.

Claims

1, the highly dense valve of sphere, comprise valve body (6), spheroid (4), valve rod (3) and rubber valve seat (5), it is characterized in that the said rubber valve seat (5) and the sphere driving fit of spheroid (4) are by the step circular hole (8) on the valve seat, all keep in touch with spheroid (4) simultaneously in two step apertures, thereby realize the twice line contact sealing; There is backguy (2) to link to each other on the valve rod (3), mentions backguy and spheroid and can open valve with upper boom (1).

2, valve as claimed in claim 1 is characterized in that in the top of valve body (6) interior spheroid (4) the plastics protective housing (7) of being with concave spherical surface being housed, and is impaired to prevent installing and transport middle steel ball.

3, valve as claimed in claim 1 is characterized in that said backguy (2) is soft nylon rope or Stainless Steel Wire.