CN202118296U

CN202118296U - Novel hard seal eccentric ball valve

Info

Publication number: CN202118296U
Application number: CN2011202198663U
Authority: CN
Inventors: 杨连成; 陈永刚; 谢建国
Original assignee: Jinggong Valve Co Ltd
Current assignee: Jinggong Valve Co Ltd
Priority date: 2011-06-27
Filing date: 2011-06-27
Publication date: 2012-01-18
Anticipated expiration: 2021-06-27

Abstract

The utility model relates to a novel hard seal eccentric ball valve, which comprises a valve body, a moving shaft seat, a fixed shaft seat, an upper valve shaft and a lower valve shaft, wherein the valve body is provided with a water inlet and a water outlet, the moving shaft seat and the fixed shaft seat are arranged at two ends of the valve body, and the upper valve shaft and the lower valve shaft are mounted on the moving shaft seat and the fixed shaft seat. Besides, a spherical cavity communicated with the water inlet and the water outlet are arranged in the valve body, a spool component is arranged in the ball valve cavity and comprises a semispherical spool unit and a sealing spherical crown arranged on the spool unit, one end of the spool unit is connected with the upper valve shaft while the other end of the spool unit is connected with the lower valve shaft, an inner annual step is arranged at a water inlet, a valve seat pressing plate is mounted on the step, an annular mounting groove is arranged between one end face of the valve seat pressing plate facing the cavity and the surface of the step, a seal ring is embedded in the mounting groove, is in sealing fit with the sealing spherical crown and consists of a hard seal and a soft seal in an overlaying manner, and a surface of the seal ring which is in sealing fit with the sealing spherical crown is a spherical surface. Compared with the prior art, the novel hard seal eccentric ball valve is simpler in processing technology and the seal ring is more reliable in sealing.

Description

Novel hard seal eccentric ball valve

Technical field

The utility model relates to a kind of ball valve, is specifically related to a kind of eccentric ball valve, particularly a kind of hard seal eccentric ball valve.

Background technique

Traditional ball valve adopts soft sealing material, exists sealing surface to be prone to scratch, and the shortcoming short with life cycle wears no resistance.

For overcoming drawback application number that conventional ball valve exists is that the patent documentation of CN201020533723.5 discloses the wear-resisting eccentric ball valve of a kind of hard sealing; This ball valve includes valve body, valve seat, valve gap and eccentric semi-spherical spool; The eccentric semi-spherical valve core is made up of valve core and steel valve core plate; The valve seat that valve seat contacts with the steel valve core plate is provided with the alloy-layer of anticorrosion antiwear, in order to ensure the reliability of sealing, to all employings spheric structure design of alloy-layer and valve core plate; Sealing layer adopts hard sealing material to process; Overcome the shortcoming that soft sealing material exists; But on hard sealing material, adopt the spheric structure design, the sphere requirement on machining accuracy is high, brings certain degree of difficulty to processing; And after the long-time use of ball valve, the wearing and tearing between spool and the valve seat are prone to cause sealing unreliable.

Summary of the invention

To the deficiency that existing technology exists, the purpose of the utility model is to provide that a kind of requirement on machining accuracy is low, processing technology simple and the novel hard seal eccentric ball valve of better tightness.

For realizing above-mentioned purpose, the utility model provides following technological scheme: a kind of novel hard seal eccentric ball valve includes the valve body that is provided with entery and delivery port; Be located at moving, the dead axle seat at valve body two ends and be installed in the upper and lower valve shaft on moving, the dead axle seat, be provided with the spherical valve pocket that is communicated with entery and delivery port in the said valve body, be provided with mangetic core assembly in the valve pocket; Mangetic core assembly includes the half ball valve core body and is located at the sealing spherical crown on the valve core; Said valve core one end is connected with last valve shaft, and the other end is connected with lower valve shaft, and said water inlet is provided with step in the annular; Be installed with disc holder on the step; Disc holder is provided with annular mounting groove between end face of valve pocket and step surface, be embedded with seal ring in the mounting groove, and seal ring and said sealing spherical crown are sealed and matched; It is characterized in that: described seal ring adopts hard sealing and the range upon range of formation of soft seal, and seal ring is a sphere with sealing the face that spherical crown is sealed and matched.

Through adopting technique scheme, valve core adopts the hemispherical dome structure design, has both alleviated the weight of valve, has reduced cost of production again; Seal ring adopts hard sealing and the range upon range of formation of soft seal, has reduced the required precision of the spheric structure design of sealing pair on the one hand, and processing technology is simple, and soft seal is sealed with bigger elasticity more firmly on the other hand, makes the sealing of sealing pair more reliable, good airproof performance.

The utility model further is set to: described hard sealing and soft seal are crisscross arranged, and seal ring has two-layer hard sealing at least, and the sealing layer at the two ends of the sphere that seal ring and sealing spherical crown are sealed and matched is hard sealing.

Through adopting technique scheme, the sealing layer at sphere two ends is hard sealing, adopts hard sealing at the relatively large edge of wearing and tearing, has reduced the wearing and tearing of seal ring, has prolonged the working life of seal ring.

The utility model also further is set to: the centre of sphere setting of the said spherical valve pocket of journal offset of described upper and lower valve shaft.

Through adopting technique scheme, spool tool eccentric cam effect makes valve have good sealing effect, can realize that again valve hangs down torque operation, and is more convenient to operate flexible.

Below in conjunction with accompanying drawing the utility model is further described.

Description of drawings

Fig. 1 is the embodiment's of the utility model a structural representation.

Fig. 2 is the embodiment's of the utility model a structural representation.

Fig. 3 is the A partial enlarged drawing of Fig. 1.

The 1-valve body, the 11-gear-box, the 12-bottom, the 13-Gland, 14-moving axis seat, 15-dead axle seat, the 2-valve core, 21-seals spherical crown, the 3-lower valve shaft, the last valve shaft of 4-, the 5-seal ring, 51-seals firmly, 52-soft seal, 6-disc holder.

Embodiment

Referring to accompanying drawing 1, accompanying drawing 2 and accompanying drawing 3; The disclosed a kind of novel hard seal eccentric ball valve of the utility model includes the valve body 1 that is provided with entery and delivery port, is provided with the spherical valve pocket that is communicated with entery and delivery port in the valve body 1; Be provided with mangetic core assembly in the valve pocket; Mangetic core assembly includes half ball valve core body 2 and is located at the sealing spherical crown 21 on the valve core 2, and said sealing spherical crown 21 is for to be located at the hard sealing material on the valve core 2, like the steel of built-up welding on valve core 2; The two ends of said valve body 1 are provided with moving,

dead axle seat

14,15; On moving axis seat 14, install valve shaft 4 through bearing and sealed member; Described sealed member on bearing on suit ring packing pad on the valve shaft 4; Fill out stuffing between valve shaft 4 and the moving axis seat 14 on Packing seat; The fixedly Gland 13 of moving axis seat 14 is arranged on filler, and the end that last valve shaft 4 is positioned at valve pocket is connected with valve core 2 through spline, the gear-box 11 of valve shaft 4 rotations on installing drive on the other end of last valve shaft 4; Through bearing and bottom 12 lower valve shaft 3 that can in dead axle seat 15, rotate is being installed on the dead axle seat 15; Be provided with Sealing between lower valve shaft 3 and the dead axle seat 15; Prevent that the liquid in the valve pocket from flowing in the dead axle seat 15; Said bottom 12 is connected on dead axle seat 15 outer ends through screw, and makes 15 sealings of dead axle seat; Said valve core 2 one ends are connected with last valve shaft 4 through spline; The other end is connected with lower valve shaft 3; Valve core 2 rotates in valve pocket through upper and

lower valve shaft

4,3, and the centre of sphere setting of the said spherical valve pocket of journal offset of described upper and

lower valve shaft

4,3, and promptly described valve core 2 adopts eccentric the setting; Make valve have good sealing effect, can realize that again valve hangs down torque operation simultaneously.

Said water inlet is provided with step in the annular; Be installed with disc holder 6 on the step; Disc holder 6 is provided with annular mounting groove between end face of valve pocket and step surface, be embedded with seal ring 5 in the mounting groove, and seal ring 5 is sealed and matched with said sealing spherical crown 21; Seal ring 5 adopts hard sealing 51 and soft seal 52 range upon range of formations, and seal ring 5 adopts the spheric structure design with the face that sealing spherical crown 21 is sealed and matched; For the sealing combination property that improves seal ring 5 and prolong 5 working lifes of seal ring; Described hard sealing 51 is crisscross arranged with soft seal 52, and seal ring 5 has two-layer hard sealing 51 at least, and the sealing layer at the two ends of the sphere that seal ring 5 and sealing spherical crown 21 are sealed and matched is hard sealing 51; Because the sealing layer abrasion at edge is big than the middle part; The sealing layer of EDGE CONTACT adopts hard sealing 51, has reduced the wearing and tearing of seal ring 5, has prolonged the working life of seal ring 5; Seal ring 5 adopts the intersecting setting, has improved the combination property of seal ring 5.

Present embodiment only is used to explain the usefulness of the utility model; It is not restriction to the utility model; Those skilled in the art are under the guidance of the spirit of the utility model; Can also make corresponding distortion and modification, so all technological schemes that are equal to all belong to the category of the utility model.

Claims

1. a novel hard seal eccentric ball valve includes the valve body that is provided with entery and delivery port, is located at moving, the dead axle seat at valve body two ends and is installed in the upper and lower valve shaft on moving, the dead axle seat; Be provided with the spherical valve pocket that is communicated with entery and delivery port in the said valve body; Be provided with mangetic core assembly in the valve pocket, mangetic core assembly includes the half ball valve core body and is located at the sealing spherical crown on the valve core, and said valve core one end is connected with last valve shaft; The other end is connected with lower valve shaft; Said water inlet is provided with step in the annular, is installed with disc holder on the step, and disc holder is provided with annular mounting groove between end face of valve pocket and step surface; Be embedded with seal ring in the mounting groove; Seal ring and said sealing spherical crown are sealed and matched, and it is characterized in that: described seal ring adopts hard sealing and the range upon range of formation of soft seal, and seal ring is a sphere with sealing the face that spherical crown is sealed and matched.

2. novel hard seal eccentric ball valve according to claim 1; It is characterized in that: described hard sealing and soft seal are crisscross arranged; And seal ring has two-layer hard sealing at least, and the sealing layer at the two ends of the sphere that seal ring and sealing spherical crown are sealed and matched is hard sealing.

3. novel hard seal eccentric ball valve according to claim 1 and 2 is characterized in that: the centre of sphere setting of the said spherical valve pocket of journal offset of described upper and lower valve shaft.