CN201025308Y - Valve plate positioning butterfly valve - Google Patents

Abstract

A valve plate positioning butterfly valve is provided, which belongs to the valve technology field. At present, when making a valve with a larger diameter using a no-pin butterfly valve, the valve plate will subside to the axis direction because of the dead weight, which results in the internal leakage of the valve. The technical proposal of the utility model is that: a valve shaft 6 passes through a hole shield ring 8, an axis shield ring 7, a valve body 10, a valve seat 4, a valve plate 5 and a globoidal supporting plate 3 separately, and stops to a supporting plate 11 where a thrust bearing 12 is provided, the thrust bearing 12 is sealed by a bottom cover 2 through a set screw 1. A flat hole is arranged in the lower end of the valve plate 5, which is inserted to and combined with the section of the flat axis of the lower part of the flat hole 6. The utility model has the advantages that: the valve has high strength and reliable performance; the service life of the valve is prolonged greatly with the anticorrosion and the antirust functions; the external dust and rainwater are prevented from invading to the valve hole; the assembly or the maintenance of the valve is very convenient as well.

Description

Valve plate locate mode butterfly valve

Technical field: the utility model relates to valve technology field, is valve plate locate mode butterfly valve more specifically.

Background technique: do not have the pin butterfly valve at present when making the valve of larger caliber, sink vertically because valve plate can appear in the influence of valve plate deadweight, and cause valve internal to leak; In addition, the intensity of the strength ratio one joint formula valve shaft of two-segment type valve shaft is low, causes elastic bending during pressurized easily; And if a joint formula valve shaft is when making collapsable shaft (lower end of valve shaft being made the thin circular shaft of small dimension), can reduce the intensity of valve shaft equally, also can form elastic bending when the valve shaft pressure-bearing, valve plate also can move to the low direction of pressure thereupon simultaneously, and the result also can cause valve leak.

Summary of the invention: for overcoming above-mentioned shortcoming, the purpose of this utility model is a kind of valve plate locate mode butterfly valve of design.Its technological scheme is: valve shaft 6 passes hole back-up ring 8, shaft retaining ring 7, valve body 10, valve seat 4, valve plate 5 and cambered surface support plate 3 respectively, and pushes up on the dunnage 11, and dunnage 11 places are provided with thrust-bearing 12, and bottom 2 seals up thrust-bearing 12 by positioning screwn 1; The lower end of valve plate 5 is provided with flat hole, matches with the flat shaft section of valve shaft 6 bottoms and be plugged in this flat hole.Valve body 10 bore areas are that macromolecular material is made coating, seal hole on the valve body 10 with rubber seal 9.The advantage of this model utility is: it has all advantages of former no pin butterfly valve; Owing to have base plate, thrust-bearing, dunnage to withstand valve shaft and cambered surface support plate, the upper end of valve shaft is positioned on the valve body with hole back-up ring and shaft retaining ring, make valve plate can so also not have the valve leak that the pin butterfly valve causes owing to the valve plate deadweight owing to focusing on certainly in the valve seat to sink vertically with regard to having overcome; This valve adopts a joint formula valve shaft, and the bottom of valve valve shaft when closed position just in time is that arc surface with beam warp is as the pressure support face, so this kind do not have pin butterfly valve intensity height, reliable performance; Do not use axle sleeve in the valve body of this valve, and do the surface treatment of valve opening with macromolecular material, the result who does like this can reduce the valve body aperture, increase the effective thickness of valve body stress surface, improve valve intensity, and can also play anticorrosion and antirust dead purpose between valve opening and the valve shaft, thereby prolonged the working life of valve greatly; Adopt rubber seal to seal on the top of valve shaft, effectively prevented in external dust, the rainwater intrusion valve body hole; Assembling or maintenance are easily.

Description of drawings: Fig. 1 is a sectional view of the present utility model, the view of Fig. 2 for making progress at Fig. 1 K.In the accompanying drawing: 1, set screw, 2, base plate, 3, the cambered surface support plate, 4, valve seat, 5, valve plate, 6, valve shaft, 7, shaft retaining ring, 8, the hole back-up ring, 9 rubber seal, 10, valve body, 11, dunnage, 12 thrust-bearings.

Embodiment: the utility model is made up of critical pieces such as set screw 1, base plate 2, cambered surface support plate 3, valve seat 4, valve plate 5, valve shaft 6, shaft retaining ring 7, hole back-up ring 8, rubber seal 9, valve body 10, dunnage 11, thrust-bearings 12, be provided with through hole in the valve plate 5, the through hole lower end is provided with flat hole, flat axle is made in valve shaft 6 lower ends, flat axle matches with carry-over moment with the flat hole of valve plate 5, load onto drive units such as handle, worm speed reducer, electric actuator or pneumatic actuator in valve shaft 6 upper ends, just can adjust the opening angle of valve plate by valve shaft 6; Valve shaft 6 passes that hole, the critical piece until arriving 10 times holes of valve body with valve are connected as a single entity under the following flat hole, valve seat of center hole, the valve plate 5 of hole on hole on the valve body, the valve seat, valve plate 5.The upper end of valve shaft 6 has locked the relative position of valve shaft 6 with valve body 10 by shaft retaining ring 7 and hole back-up ring 8, the flat axle in the lower end of valve shaft 6 is when the flat hole of the lower end of passing through valve plate 5, defining valve plate 5 again can not move vertically, insert in two cambered surface support plates 3 hole under the valve body, the lower end that makes its upper end withstand valve plate 5, the lower end of cambered surface support plate 3 is again by dunnage 11, thrust-bearing 12 is limited and can not move down by base plate 2 and set screw 1, thereby define the relative position of valve plate 5 and valve seat 4, valve plate 5 can not moved up and down along axle owing to deadweight or other external force factors, effectively prevented since valve plate 5 move up and down the valve leak that causes.Dunnage 11 is integrated cambered surface support plate 3 and valve shaft 6 and synchronizes them rotation, the deadweight of valve plate since by thrust axis hold 12 support, so reduced the unlatching moment of torsion of valve greatly; Valve is when closed position, the pressure of medium acts on the valve body by valve plate 5, valve shaft 6, the bottom of valve shaft 6 just in time be arc surface with beam warp as the pressure support face, valve shaft 6 can with higher intensity the pressure special delivery to valve body 10, thereby guaranteed the operational safety of valve; Valve plate 5 when open position, though valve shaft 6 lower ends be with flat axle direction stressed, the lifting surface area of valve plate 5 in medium is very little, medium is little to the pressure of valve plate 5 and valve shaft 6, so valve still can be in good state.Another characteristics of this model utility are to have cancelled all axle sleeves.Because belonging to, the rotation of valve plate 5 slowly runs, rotational frequency is very low, so in order to improve the intensity of valve, do not use axle sleeve in the valve body of this valve, and do the surface treatment of valve opening with macromolecular material, after being cancelled, axle sleeve can reduce the valve body aperture, increase the effective thickness of valve body stress surface, improve valve intensity, and can also play anticorrosion and antirust dead purpose between valve opening and the valve shaft, valve body 10 bore areas are selected for use macromolecular material to make coating and are handled, and seal hole on the valve body 10 with rubber seal 9, prevent the intrusion of outside dust and rainwater, so that prolong the working life of valve.Prevented that effectively external dust, rainwater from invading in the valve body hole, thereby prolonged the working life of valve greatly.The lower end of valve plate 5 is provided with flat hole, match with the flat shaft section of valve shaft 6 bottoms and drive the valve plate rotation in this flat hole, hole back-up ring 8, shaft retaining ring 7 match with cambered surface support plate 3, thrust-bearing 12, dunnage 11, bottom 2, the valve shaft 6, valve plate 5 and the relative position of valve body 10, valve seat 4 are fixed, made it not to move up and down and cause valve leak owing to deadweight or other external force factors and along axle.

Claims (2)

1. valve plate locate mode butterfly valve, it is characterized in that: valve shaft (6) passes hole back-up ring (8), shaft retaining ring (7), valve body (10), valve seat (4), valve plate (5) and cambered surface support plate (3) respectively, and push up on the dunnage (11), dunnage (11) locates to be provided with thrust-bearing (12), and bottom (2) seals up thrust-bearing (12) by positioning screwn (1); The lower end of valve plate (5) is provided with flat hole, matches with the flat shaft section of valve shaft (6) bottom and be plugged in this flat hole.

2. valve plate locate mode butterfly valve according to claim 1 is characterized in that: valve body (10) bore area is that macromolecular material is made coating, seals valve body (10) with rubber seal (9) and goes up the hole.

Images