CN201764000U

CN201764000U - Multiple sealing eccentric ball valve

Info

Publication number: CN201764000U
Application number: CN2010205287344U
Authority: CN
Inventors: 刘庆国; 陈广兵; 黄时生; 蔡毅
Original assignee: SHANGHAI WEILUN VALVE CO LTD
Current assignee: SHANGHAI WEILUN VALVE CO LTD
Priority date: 2010-09-14
Filing date: 2010-09-14
Publication date: 2011-03-16
Anticipated expiration: 2020-09-14

Abstract

The utility model discloses a multiple sealing eccentric ball valve comprising a valve body, a valve base component, a valve core and a valve shaft. The valve body is a spherical body with an inner cavity, and two pipe orifices with flanges are disposed on two sides of the spherical body. A fixed shaft seat is disposed under the spherical body, and a moving shaft seat is disposed above the spherical body. A circular inner step installation groove is disposed on one of the pipe orifices, and the valve base component is disposed in the installation groove. The valve core is the eccentric valve core with the spherical surface structure disposed on the sealing end, and the lower part of the valve core is rotatble disposed on the fixed shaft base through a lower bearing and a fixed shaft. A valve shaft is disposed on the moving shaft base through an upper bearing and a sealing part. The lower end of a valve shaft is connected with the valve core through a spline, and a driving handle is disposed on the upper end of the valve shaft. The utility model has advantages of simple structure, good sealing performance, light weight and stable performance.

Description

Multi-sealed eccentric ball valve

Technical field

The utility model relates to a kind of eccentric ball valve, relates in particular to a kind of multi-sealed eccentric ball valve.

Background technique

In pipe-line system, solid particles such as catalyzer, coal dust, polysilicon are during as medium transport, and are very high to the wear-resisting requirement of valve, and the ball valve of conventional construction is owing to adopt soft sealing material, exist sealing surface easily to abrade, problems such as wear resistance is not high, and life cycle is short, and there are two seal valve seats in the conventional construction ball valve, solid dielectric can accumulate in the inner chamber of sealing, of long duration can all being full of, medium and spheroid friction-produced valve operation moment become big, the valve operation difficulty.Manually-operated gate can also adopt the method that strengthens switch force to solve, and pneumatic, electric valve is owing to drive the restriction of rated moment, and on-the-spot problem is a lot, takes to strengthen the drive unit specification or the method for buying again at last, makes many troubles to the user.Also there is hard seal ball valve in pipeline, to use now, solved the problem that inner chamber accumulates medium, but owing to be subjected to the restriction of single shape metallic leak-proof structure, exist sealability unstable and problem such as lack working life.

Summary of the invention

In order to overcome above-mentioned the deficiencies in the prior art, the utility model provides the multi-sealed eccentric ball valve of a kind of simple in structure, good airproof performance, in light weight, stable performance.

For achieving the above object, the utility model is by the following technical solutions: a kind of multi-sealed eccentric ball valve, comprise valve body, valve component, spool and valve shaft, it is characterized in that: described valve body is a spheroid with internal cavities, the both sides of spheroid are the mouths of pipe with flange, the dead axle seat is arranged below the spheroid, the moving axis seat is arranged above the spheroid; A mouth of pipe therein is provided with step mounting groove in the annular, and valve component is installed in mounting groove; Described spool is the eccentric spool that sealed end is spheric structure, and the bottom of spool is rotatably installed on the dead axle seat by lower bearing and stationary axle; By upper bearing (metal) and sealed member valve shaft is installed on the moving axis seat, the lower end of valve shaft is connected with spool by spline, in the upper end of valve shaft driving handle is installed.

Described valve component is that the step mounting groove is embedded in combined seal ring in annular, setting-in ring-shaped valve seats body in the combined seal ring, on the mouth of pipe of the outer end of combined seal ring and valve body disc holder is installed, between combined seal ring and mounting groove, be provided with the static seal circle, between disc holder and mounting groove, be provided with pad.

In order to realize the sealing between valve shaft and the moving axis seat, between the top of upper bearing (metal) valve shaft and moving axis seat, sealed member is arranged, described sealed member is a suit ring packing pad on the valve shaft on upper bearing (metal), fill filler between valve shaft on Packing seat and the moving axis seat, the Gland that is fixed on the moving axis seat is arranged above the filler.

In order to strengthen the abrasion resistance of spool, on the surface of spool, especially at the sphere end surfacing nickel-base alloy of spool.

In order to realize mechanization and automation control, described driving handle replaces with gear-box.

In order to realize metal and nonmetal multi-sealed function, described combined seal ring adopts stainless steel sheets and graphite flake is stacked forms.

Described stationary axle is installed on the dead axle seat by bottom and sealing gasket.

Described pad is a spiral wound gasket.

The beneficial effects of the utility model are: 1, owing to adopted the multi-sealed of combined seal ring formation, cooperate two eccentric structure spheroids, all can realize sealing in a plurality of positions, sealability is stable, and seal ring convenient maintenance and replacement repeatedly, avoid the maintenance of hard seal ball valve sealing surface to need the difficulty of welding, grinding.2, two eccentric cam effects of spool make valve have excellent sealing performance, can realize that again valve hangs down torque operation, and semiglobe has alleviated the weight of valve simultaneously, and it is low to produce cost in batches, meets energy-conservation requirement.

Description of drawings

Fig. 1 is the multi-sealed eccentric ball valve closed condition of a utility model vertical section structure schematic representation;

Fig. 2 is the multi-sealed eccentric ball valve closed condition of a utility model horizontal section structural representation;

Fig. 3 is the multi-sealed eccentric ball valve opening state of a utility model horizontal section structural representation;

Among the figure: 1. valve body, 2. bottom, 3. sealing gasket, 4. valve body, 5. combined seal ring, 6. disc holder, 7. pad, 8. static seal circle, 9. valve shaft, 10. upper bearing (metal), 11. Packing seat, 12. fillers, 13. Glands, 14. gear-box, 15. moving axis seats, 16. spools, 17. lower bearing, 18. stationary axle, 19. dead axle seats.

Embodiment

Below in conjunction with drawings and Examples the utility model is further specified.

As Fig. 1, Fig. 2 and shown in Figure 3, a kind of multi-sealed eccentric ball valve, comprise valve body 1, valve component, spool 16 and valve shaft 9, described valve body 1 is a spheroid with internal cavities, the both sides of spheroid are the mouths of pipe with flange, dead axle seat 19 is arranged below the spheroid, moving axis seat 15 is arranged above the spheroid; A mouth of pipe therein is provided with step mounting groove in the annular, and valve component is installed in mounting groove; Described spool 16 is eccentric spools that sealed end is spheric structure, and at the surface spraying weld nickel-base alloy of spool, the bottom of spool 16 is rotatably installed on the dead axle seat 19 by lower bearing 17 and stationary axle 18, bottom 2 and sealing gasket 3; On moving axis seat 15, valve shaft 9 is installed by upper bearing (metal) 10 and sealed member, described sealed member is a suit ring packing pad 11 on the valve shaft 7 on upper bearing (metal) 10, fill filler 12 between valve shaft 9 on Packing seat 11 and the moving axis seat 15, the Gland 13 that is fixed on the moving axis seat 15 is arranged above the filler 12, the lower end of valve shaft 9 is connected with spool 16 by spline, in the upper end of valve shaft 9 gear-box 14 that drives valve shaft 9 rotations is installed.Described valve component is that the step mounting groove is embedded in combined seal ring 5 in annular, setting-in ring-shaped valve seats body 4 in the combined seal ring 5, disc holder 6 is installed on the mouth of pipe of the outer end of combined seal ring 5 and valve body 4, between combined seal ring 5 and mounting groove, be provided with static seal circle 8, between disc holder 6 and mounting groove, be provided with spiral wound gasket 7.Described combined seal ring 5 adopts stainless steel sheets and graphite flake is stacked forms.

Claims

1. multi-sealed eccentric ball valve, comprise valve body (1), valve component, spool (16) and valve shaft (9), it is characterized in that: described valve body (1) is a spheroid with internal cavities, the both sides of spheroid are the mouths of pipe with flange, dead axle seat (19) is arranged below the spheroid, moving axis seat (15) is arranged above the spheroid; A mouth of pipe therein is provided with step mounting groove in the annular, and valve component is installed in mounting groove; Described spool (16) is the eccentric spool that sealed end is spheric structure, and the bottom of spool (16) is rotatably installed on the dead axle seat (19) by lower bearing (17) and stationary axle (18); Go up by upper bearing (metal) (10) and sealed member installation valve shaft (9) at moving axis seat (15), the lower end of valve shaft (9) is connected with spool (16) by spline, in the upper end of valve shaft (9) driving handle is installed.

2. according to the described multi-sealed eccentric ball valve of claim 1, it is characterized in that: described valve component is that the step mounting groove is embedded in combined seal ring (5) in annular, combined seal ring (5) interior setting-in ring-shaped valve seats body (4), disc holder (6) is installed on the mouth of pipe of the outer end of combined seal ring (5) and valve body (4), between combined seal ring (5) and mounting groove, be provided with static seal circle (8), between disc holder (6) and mounting groove, be provided with pad (7).

3. according to claim 1 or 2 described multi-sealed eccentric ball valves, it is characterized in that: between the top valve shaft (9) of upper bearing (metal) (10) and moving axis seat (15), sealed member is arranged, described sealed member is that the valve shaft (9) on upper bearing (metal) (10) is gone up suit ring packing pad (11), fill filler (12) between valve shaft (9) on Packing seat (11) and the moving axis seat (15), the Gland (13) that is fixed on the moving axis seat (15) is arranged above the filler (12).

4. according to the described multi-sealed eccentric ball valve of claim 3, it is characterized in that: at the surface spraying weld nickel-base alloy of spool (16).

5. according to the described multi-sealed eccentric ball valve of claim 3, it is characterized in that: described driving handle replaces with gear-box (14).

6. according to the described multi-sealed eccentric ball valve of claim 3, it is characterized in that: described combined seal ring (5) adopts stainless steel sheets and graphite flake is stacked forms.

7. according to the described multi-sealed eccentric ball valve of claim 3, it is characterized in that: described stationary axle (18) is installed on the dead axle seat (19) by bottom (2) and sealing gasket (3).

8. according to the described multi-sealed eccentric ball valve of claim 3, it is characterized in that: described pad (7) is a spiral wound gasket.