CN210623593U

CN210623593U - Low leakage rate ventilation butterfly valve

Info

Publication number: CN210623593U
Application number: CN201921465983.0U
Authority: CN
Inventors: 季善宏; 夏克洲
Original assignee: Shanghai Juliang Valve Group Co Ltd
Current assignee: Shanghai Juliang Valve Group Co Ltd
Priority date: 2019-09-05
Filing date: 2019-09-05
Publication date: 2020-05-26
Anticipated expiration: 2029-09-05

Abstract

The utility model discloses a low leakage rate ventilation butterfly valve relates to the relevant field of butterfly valve, adds the eccentric seal design to the ventilation butterfly valve, makes the low leakage of ventilation butterfly valve, is difficult to leak. The butterfly valve body includes butterfly plate and valve shaft, the butterfly plate includes the sealing washer, the sealing washer central line is skew with valve shaft central line, the sealing washer central line is skew with butterfly valve body central line, the lower extreme of butterfly plate is provided with oblique cone angle, and butterfly plate and oblique cone angle laminating, channel axis forms the declination in oblique cone angle gyration axis and the butterfly valve body, it is fixed that butterfly plate and valve shaft pass through the mounting, electric drive mechanism is installed to the upper end of butterfly valve body, electric drive mechanism includes the spliced pole, the butterfly valve body includes down the spliced pole, the centre of butterfly valve body lower extreme is provided with the disk seat, it is provided with the valve shaft with the intermediate position of spliced pole down to go up the spliced pole.

Description

Low leakage rate ventilation butterfly valve

Technical Field

The utility model relates to a butterfly valve correlation field specifically is low leakage rate ventilation butterfly valve.

Background

The butterfly valve is a valve which uses a circular butterfly plate as an opening and closing part and rotates along with a valve rod to open, close and adjust a fluid passage, and has the advantages of simple structure, small volume, light weight, material consumption saving, small driving moment, simple and convenient operation, rapidness, good flow regulation function and closing and sealing characteristics.

The common ventilation butterfly valve at present often encounters a problem, namely, because the universal butterfly plate is made into a sealing ring by adopting the same material as the butterfly valve body and is always in an extruding and scraping state with the valve seat, the sealing principle of the universal butterfly plate belongs to a position sealing structure, the requirement on the closing position is high, the leakage is easy, and the market demand can not be met far; therefore, the market urgently needs to develop a ventilation butterfly valve with low leakage rate to help people solve the existing problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a low leakage rate ventilation butterfly valve adds the eccentric seal design to the ventilation butterfly valve, makes the low leakage of ventilation butterfly valve, is difficult to leak.

In order to achieve the above object, the utility model provides a following technical scheme: low leakage rate butterfly valve that ventilates, including the butterfly valve body, the butterfly valve body includes butterfly plate and valve shaft, the butterfly plate includes the sealing washer, the sealing washer central line is skew with valve shaft central line, the sealing washer central line is skew with butterfly valve body central line, the lower extreme of butterfly plate is provided with oblique cone angle, and butterfly plate and oblique cone angle laminating, oblique cone angle gyration axis forms the declination with butterfly valve body inner channel axis.

Preferably, the butterfly plate and the valve shaft are fixed through a fixing piece, and the fixing piece is connected with the butterfly plate in a welding mode.

Preferably, the upper end of the butterfly valve body is provided with an electric driving mechanism.

Preferably, electric drive mechanism includes the spliced pole, the butterfly valve body includes spliced pole down, and goes up the spliced pole and pass through flange joint with spliced pole down.

Preferably, a valve seat is arranged in the middle of the lower end of the butterfly valve body and connected with the valve shaft through a bearing.

Preferably, a valve shaft is arranged in the middle of the upper connecting column and the lower connecting column, and the valve shaft is connected with the upper connecting column and the lower connecting column through a sealing piece.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses an in, the sealing washer central line is skew with valve shaft central line, the sealing washer central line is skew with butterfly valve body central line, oblique cone angle gyration axis forms the declination with the interior passageway axis of butterfly valve body, make oblique cone angle and sealing washer break away from at the whole switch in-process of valve safety, this kind of structure has both utilized the cam effect, the friction has been eliminated again completely, the possibility of wearing and tearing and leakage has been got rid of, zero leakage is realized through the elasticity of sealing washer on the butterfly plate, the elasticity of this sealing washer is through its radial compression and flexible production.

2. The utility model discloses an in, the sealing washer is connected through oblique cone angle with the disk seat contact, and the sealing washer produces slight " formula effect" with oblique cone angle, makes the sealing washer take place gentle move and radial compression, through the flexibility of even contact and sealing washer between sealing washer and the oblique cone angle for the load on the disk seat is even, thereby realizes the tightest cutting off with the moment of torsion of minimum, and the elasticity that the moment of torsion produced makes the valve tightly close, and is irrelevant with medium flow direction or medium power.

Drawings

FIG. 1 is a front view of the low leakage rate vent butterfly valve of the present invention;

FIG. 2 is a side view of the low leakage rate vent butterfly valve of the present invention;

fig. 3 is an internal top view of the butterfly valve body of the present invention.

In the figure: 1. an electric drive mechanism; 2. a butterfly valve body; 3. an upper connecting column; 4. a lower connecting column; 5. a butterfly plate; 6. a valve shaft; 7. a fixing member; 8. a seal ring; 9. a taper angle; 10. a valve seat; 11. and a seal.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, the present invention provides an embodiment: a low leakage rate ventilation butterfly valve comprises a butterfly valve body 2, the butterfly valve body 2 comprises a butterfly plate 5 and a valve shaft 6, the butterfly plate 5 comprises a sealing ring 8, the central line of the sealing ring 8 deviates from the central line of the valve shaft 6 by an offset distance A (shown in figures 2 and 3), the central line of the sealing ring 8 deviates from the central line of the butterfly valve body 2 by an offset distance B (shown in figures 1 and 3), the lower end of the butterfly plate 5 is provided with an oblique cone angle 9, the butterfly plate 5 is attached to the oblique cone angle 9, the rotation axis of the oblique cone angle 9 forms an offset angle with the axis of a channel in the butterfly valve body 2 (shown in figure 2), namely, the butterfly plate 5 inclines in the X direction, compared with the traditional butterfly plate 5, the oblique cone angle 9 generates a slight ' type effect' with the sealing ring 8 on the butterfly plate 5 during rotation, so that the sealing ring 8 generates flexibility and radial compression, the sealing ring 8 is uniformly contacted with the oblique cone angle 9 and the flexibility of the sealing ring 8, the load on the valve seat 10 is made uniform so that the tightest shut-off is achieved with the least torque, thereby reducing the leak rate.

Further, the butterfly plate 5 and the valve shaft 6 are fixed through a fixing part 7, the fixing part 7 is connected with the butterfly plate 5 in a welding mode, the fixing part 7 is annular, the inner diameter of the fixing part 7 is the same as the outer diameter of the valve shaft 6, and the number of the fixing parts 7 is two, and the fixing parts are fixed at the upper end position and the lower end position.

Further, the electric driving mechanism 1 is mounted on the upper end of the butterfly valve body 2, and the electric driving mechanism 1 has the same internal components as the existing electric driving mechanism 1, so that the electric driving mechanism 1 is not specifically described, and basically, the valve shaft 6 is finally rotated in an electric driving mode.

Further, electric drive mechanism 1 includes spliced pole 3, goes up spliced

pole

3 and 1 casing welded connection of electric drive mechanism, and butterfly valve body 2 includes spliced pole 4 down, and spliced pole 4 and the outer component welded connection of butterfly valve body 2 down, and go up spliced pole 3 and pass through flange joint with spliced pole 4 down, and the screw is provided with two circles on the ring flange, and inside and outside dual fixed.

Further, a valve seat 10 is arranged in the middle of the lower end of the butterfly valve body 2, and the valve seat 10 is connected with the valve shaft 6 through a bearing.

Further, the intermediate position of going up spliced pole 3 and lower spliced pole 4 is provided with valve shaft 6, and valve shaft 6 and last spliced pole 3 are connected through sealing member 11 with lower spliced pole 4, go up through flange joint between spliced pole 3 and the lower spliced pole 4, for the leakproofness consideration, so be provided with sealing member 11 in the piece position, and sealing member 11 extends to the channel position of butterfly valve body 2, avoids revealing of flowing medium.

The working principle is as follows: when in use, the electric driving mechanism 1 works to drive the valve shaft 6 to rotate, and as the valve shaft 6 and the butterfly plate 5 are fixed through the fixing piece 7, therefore, the butterfly plate 5 rotates along with the rotation of the valve shaft 6, because the central line of the sealing ring 8 deviates from the central line of the valve shaft 6, the central line of the sealing ring 8 deviates from the central line of the butterfly valve body 2, the rotary axis of the inclined cone angle 9 forms a deviation angle with the axis of the channel in the butterfly valve body 2, the inclined cone angle 9 is safely separated from the sealing ring 8 in the whole opening and closing process of the valve, the inclined cone angle 9 and the sealing ring 8 generate slight ' type effect' in the process, so that the sealing ring 8 generates flexible motion and radial compression, by the uniform contact between the sealing ring 8 and the inclined cone angle 9 and the flexibility of the sealing ring 8, the load loaded on the valve seat 10 is uniform, the tightest shut-off is thus achieved with the lowest torque, and the opening and closing of the valve is achieved by rotation of the butterfly plate 5.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. Low leakage rate ventilation butterfly valve, including butterfly valve body (2), its characterized in that: butterfly valve body (2) include butterfly plate (5) and valve shaft (6), butterfly plate (5) are including sealing washer (8), sealing washer (8) central line and valve shaft (6) central line skew, sealing washer (8) central line and butterfly valve body (2) central line skew, the lower extreme of butterfly plate (5) is provided with oblique cone angle (9), and butterfly plate (5) and oblique cone angle (9) laminating, channel axis forms the declination in oblique cone angle (9) gyration axis and butterfly valve body (2).

2. The low leakage rate vent butterfly valve of claim 1, wherein: the butterfly plate (5) is fixed with the valve shaft (6) through a fixing piece (7), and the fixing piece (7) is connected with the butterfly plate (5) in a welding mode.

3. The low leakage rate vent butterfly valve of claim 1, wherein: an electric driving mechanism (1) is installed at the upper end of the butterfly valve body (2).

4. The low leakage rate vent butterfly valve of claim 3, wherein: the electric driving mechanism (1) comprises an upper connecting column (3), the butterfly valve body (2) comprises a lower connecting column (4), and the upper connecting column (3) is connected with the lower connecting column (4) through a flange.

5. The low leakage rate vent butterfly valve of claim 1, wherein: the middle of the lower end of the butterfly valve body (2) is provided with a valve seat (10), and the valve seat (10) is connected with the valve shaft (6) through a bearing.

6. The low leakage rate vent butterfly valve of claim 4, wherein: the valve shaft (6) is arranged in the middle of the upper connecting column (3) and the lower connecting column (4), and the valve shaft (6) is connected with the upper connecting column (3) and the lower connecting column (4) through a sealing piece (11).