CN2406115Y

CN2406115Y - Three eccentric butterfly valve

Info

Publication number: CN2406115Y
Application number: CN 00210703
Authority: CN
Inventors: 黄剑峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-01-27
Filing date: 2000-01-27
Publication date: 2000-11-15
Anticipated expiration: 2010-01-27

Abstract

The utility model discloses a three-eccentric butterfly valve, relating to a valve used in a water pipeline and a drainage pipeline. The utility model is designed in order to mainly solve the problems that a switch for the existing center line type butterfly valve is not flexible and is easy for leakage, the service life is short, etc. The utility model mainly has a transmission device, a valve body, a valve clack, an upper gland, a lower gland, a semicircular key, a clamping ring, an O-shaped ring, etc. The utility model also has a hinge, a supporting frame, a small shaft, etc. The utility model has the advantages of using the structure such as three-eccentric structure, etc. The utility model has the advantages of flexible opening and closing, small friction, remote possibility of leakage of media., and long service life.

Description

Three eccentric butterfly valve

The utility model relates to the valve that uses on a kind of water supply and sewerage pipeline.

Existing reed valve mostly is the center line formula, and shortcoming is that switch is dumb, and friction is big, easily leaks, and working life is short.

The purpose of this utility model is that a kind of switch of design is flexible, and friction is little, is difficult for leaking the three eccentric butterfly valve of long service life.

The purpose of this utility model can be realized by following proposal: it comprises valve body 4, on the top of valve body transmission device 19 is arranged, transmission device is connected with valve shaft 6 by woodruff key 1, we make valve shaft 6 be connected with flap 7 by little 14 of hinge 12 usefulness, be welded with support 13 on the flap, little axle passes support, and O type circle is contained on the flap, flap and trim ring compress O type circle with slotted pan head screw, and transmission device 19 output torques drive the flap switch; Valve shaft is eccentric in the center of valve body, and the sealing seat of valve body and O type circle are partial to a side of valve body simultaneously, and the force bearing point that flap is closed is in a side of flap center line.

The utility model has the advantages that: owing to taked structural feature such as three off-centre, make this threshold switch flexible, friction is little, and medium is difficult for leaking long service life.

Fig. 1 is a plan view of the present utility model;

Fig. 2 is a generalized section of the present utility model.

Among the figure: 1. woodruff key; 2. upper press cover; 3. gland; 4. valve body; 5. seal ring; 6. valve shaft; 7. flap; 8. flap seal ring; 9. trim ring; 10. slotted pan head screw; 11. key; 12. hinge; 13. support; 14. little axle; 15. cotter pin; 16. hexagon nut; 17.O type circle; 18. lower cover; 19. transmission device; 20. flap center line; 21. hexagon head bolt.

Embodiment: at the top of valve body dress transmission device 19, transmission device is connected with valve shaft 6 by woodruff key 1, valve shaft 6 is connected with flap 7 by little 14 of hinge 12 usefulness, be welded with support 13 on the flap, little axle passes support, and O type circle is contained on the flap, flap and trim ring compress O type circle with slotted pan head screw, valve shaft is eccentric in the center of valve body, and the sealing seat of valve body and O type circle are partial to a side of valve body simultaneously, and the force bearing point that flap is closed is in a side of flap center line.

Claims

1. three eccentric butterfly valve, comprise valve body [4], transmission device [19] is arranged on the top of valve body, transmission device is connected with valve shaft [6] by woodruff key [1], it is characterized in that valve shaft [6] is connected with flap [7] with little axle [14] by hinge [12], be welded with support [13] on the flap, little axle passes support, O type circle is contained on the flap, flap and trim ring compress O type circle with slotted pan head screw, valve shaft is eccentric in the center of valve body, and the sealing seat of valve body and O type circle are partial to a side of valve body simultaneously, and the force bearing point that flap is closed is in a side of flap center line.