CN201461994U

CN201461994U - Bidirectional seal butterfly valve

Info

Publication number: CN201461994U
Application number: CN2009200819385U
Authority: CN
Inventors: 陶洪兴; 周屹山
Original assignee: SICHUAN GELIN LIQUID CONTROL EQUIPMENT CO Ltd
Current assignee: SICHUAN GELIN LIQUID CONTROL EQUIPMENT CO Ltd
Priority date: 2009-06-23
Filing date: 2009-06-23
Publication date: 2010-05-12
Anticipated expiration: 2019-06-23

Abstract

The utility model discloses a bidirectional seal butterfly valve which mainly comprises a valve seat (1), a valve rod (2), a butterfly plate (3), a valve body (4), an anti-blow ring (5), a pressure ring (7), a stuffing (8) and a butterfly spring assembly (11). The central line of the valve rod (2) and the seal surface of the butterfly plate (3) as well as the channel central line of the valve body (4) respectively have eccentric magnitudes. Because the butterfly spring assembly is adopted to press the stuffing, and the anti-blow ring (5) is mounted between the stuffing pressure ring (7) and the valve rod (2), the utility model can automatically compensate stuffing wear and deformation, and avoid the valve rod from breaking and flying out to hurt people.

Description

A kind of bidirectional sealed butterfly valve

Technical field

The utility model relates to a kind of valve, specifically relates to a kind of bidirectional sealed butterfly valve.

Background technique

Bidirectional sealed butterfly valve is widely used in being used for closed circuit sealing, throttling arrangement, controlling device etc. in the industrial processes such as chemical industry, oil, metallurgy, mine, electric power, the energy, building.There is following defective in traditional bidirectional sealed butterfly valve: the one, and nothing prevents the protective equipment that valve stem crack flies out, and when valve stem crack, under the active force of medium, causes casualties with regard to spraying fast; The 2nd, the wearing and tearing of filler and distortion can not compensate automatically, thereby can't avoid filler in use to leak, and then influence the sealing of valve rod; The 3rd, what fell the jointing place of the butterfly plate back side and sealing surface is the right angle, and when the valve folding, the swiping district of butterfly plate just might scratch valve seat like this.

Summary of the invention

The purpose of this utility model is to provide a kind of bidirectional sealed butterfly valve, and this butterfly valve can compensate the wearing and tearing and the distortion of filler automatically, and flies out can avoid valve stem crack the time and hurt sb.'s feelings.

For achieving the above object, the solution that the utility model adopts is: this bidirectional sealed butterfly valve comprises valve seat, valve rod, butterfly plate, valve body, Gland, trim ring, filler, double-screw bolt and nut, butterfly plate is connected and is installed in the passage place of valve body by carving pin with valve rod, valve seat is installed on the periphery of butterfly plate, the center line of the center line of valve rod and the sealing surface of butterfly plate and valve channel has offset respectively, one butterfly spring assembly also has been installed between Gland and nut, this butterfly spring assembly comprises the spring lid, butterfly spring group and spring letter, butterfly spring is assembled in the spring letter, and it is fixing with the spring lid, in addition, between filler pressing and valve rod, also be provided with an anti-ring that blows, should anti-blow the indent step place of ring set, and be embedded in the filler pressing at valve rod.

Arc transition is adopted in the back side of above-mentioned butterfly plate and the jointing place of sealing surface.

The utlity model has following effect: (1) therefore can compensate the wearing and tearing of filler and the distortion that temperature variation causes automatically owing to adopted the butterfly spring group to press filler, has avoided filler in use to leak effectively, has guaranteed the sealing effect of valve rod; (2) owing to adopted the anti-ring structure that blows, in the time of therefore can effectively preventing valve stem crack, hurt sb.'s feelings, guaranteed the safe in utilization of valve because the thrust of medium sprays valve rod; (3) owing to adopted arc transition in the jointing place of the butterfly plate back side and sealing surface, butterfly plate scratches valve seat in the time of therefore can avoiding the valve folding, has prolonged the working life of valve seat.

Description of drawings

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

Fig. 2 is a right elevation of the present utility model.

Fig. 3 is the part rotation enlarged view of the utility model along A-A direction among Fig. 2.

Fig. 4 is a longitudinal section of the present utility model.

Fig. 5 is the enlarged view at I place among Fig. 4.

Embodiment

As Fig. 1～shown in Figure 5, the utility model is by valve seat 1, valve rod 2, butterfly plate 3, valve body 4, the anti-ring 5 that blows, Gland 6, trim ring 7, filler 8, carve pin 9, spring lid 10, butterfly spring group 11, spring letter 12, double-screw bolt 14 and nut 15 are formed, valve rod 2 is by Gland 6, trim ring 7, filler 8, spring lid 10, butterfly spring group 11 and spring letter 12 are installed on the valve body 4, butterfly plate 3 usefulness are carved the passage place that pin 9 is fixedlyed connected with valve rod 2 and is installed in valve body 4, valve seat 1 is installed in the periphery of butterfly plate 3. and the utility model is two eccentric sealed butterfly valves, the channel centerline of the sealing surface of the center line of its valve rod 2 and butterfly plate 3 and valve body 4 has offset respectively, adopt this pair of eccentric structure can reduce friction between valve seat 1 and butterfly plate 3 edges largely, but from present use condition, though taked two eccentric structures, because the back side of butterfly plate 3 and the jointing place of sealing surface have corner angle, therefore when the valve folding, the scratching district of butterfly plate 3 still may scratch valve seat 1, thereby influence the working life of valve seat 1, for a change this situation, the utility model has adopted arc transition 13 (as shown in Figure 5) at the back side of butterfly plate 3 and the jointing place of sealing surface, so just can effectively avoid the scuffing of valve seat 1.

The utility model adopts butterfly spring group 11 to press filler 8, and as shown in Figure 3, this butterfly spring group 11 is contained in the spring letter 12, and fixing with spring lid 10.The purpose one that adopts the butterfly spring group is that compensation automatically is because of the long-time wearing and tearing of using the filler 8 that causes; The 2nd, the automatically distortion of the filler that causes because of difference variation of compensation, thus avoid filler 8 that leakage in use takes place and influence the sealing of valve rod 2.

As shown in Figure 3, the utility model has also been installed an anti-ring 5 that blows between filler pressing 7 and valve rod 2, and this anti-ring 5 that blows is enclosed within the indent step place of valve rod 2, and is embedded in the filler pressing 7, and for ease of installing, the anti-ring 5 that blows is designed to untight ring.When valve rod 2 fractures, these anti-ring 5 indent step places that can keep off of blowing at valve rod, the cloudy valve rod that ends fracture flies out and hurts sb.'s feelings.

Claims

1. bidirectional sealed butterfly valve, comprise valve seat (1), valve rod (2), butterfly plate (3), valve body (4), Gland (6), trim ring (7), filler (8), double-screw bolt (14) and nut (15), butterfly plate (3) is connected and is installed in the passage place of valve body (4) by carving pin (9) and valve rod (2), valve seat (1) is installed on the periphery of butterfly plate (3), the channel centerline of the sealing surface of the center line of valve rod (2) and butterfly plate (3) and valve body (4) has offset respectively, it is characterized in that:

(1) between Gland (6) and nut (15) a butterfly spring assembly has been installed, this butterfly spring assembly comprises spring lid (10), butterfly spring group (11) and spring letter (12), and butterfly spring group (11) is loaded in the spring letter (12), and fixing with spring lid (10);

(2) be provided with an anti-ring that blows between filler pressing (7) and valve rod (2), this prevents blowing the indent step place of ring set at valve rod (2), and is embedded in the filler pressing (7).

2. a kind of bidirectional sealed butterfly valve according to claim 1 is characterized in that: arc transition (13) is adopted in the back side of butterfly plate (3) and the jointing place of sealing surface.