CN218670680U

CN218670680U - Three-eccentric sealing butterfly valve

Info

Publication number: CN218670680U
Application number: CN202223329475.4U
Authority: CN
Inventors: 周福祥; 徐红星
Original assignee: Lishui Branch Of Shanghai Haoyi Valve Group Co ltd
Current assignee: Lishui Branch Of Shanghai Haoyi Valve Group Co ltd
Priority date: 2022-12-13
Filing date: 2022-12-13
Publication date: 2023-03-21
Anticipated expiration: 2032-12-13

Abstract

The utility model discloses a three-eccentric sealing butterfly valve, which comprises a valve seat, a transmission device and a butterfly plate; the middle part of the valve seat is rotatably provided with a valve shaft, the valve shaft extends to the middle part of the valve seat and is connected with a butterfly plate, and the butterfly plate is an entity with an elliptic section with a certain thickness and is matched with a channel formed by the valve seat; the outer ring surface of the butterfly plate is sleeved with a sealing ring, a pressing plate is sleeved outside the butterfly plate corresponding to the sealing ring to form covering pressing for the sealing ring, and the outer ring surface of the sealing ring extends to the extent that the butterfly plate is contacted with the inner wall of the valve seat; a transmission device is installed at the upper end of the valve seat, a rotating rod is rotatably arranged on one side of the transmission device, and a hand wheel is installed at one end, extending to the outside, of the rotating rod. The utility model discloses at the in-process that uses, very reliable sealing performance when having realized the valve and closing through the sealing washer isotructure of butterfly plate department, and the medium flow rate when the butterfly plate is close to closing is high, is slick and sly curved surface shape, can avoid appearing the phenomenon that the jam blockked up the valve.

Description

Three-eccentric sealing butterfly valve

Technical Field

The utility model relates to a butterfly valve technical field especially relates to a three eccentric seal butterfly valves.

Background

In the traditional concept, a butterfly valve can only be used in the occasions with low requirements on normal temperature, low pressure and tightness, and a three-eccentric metal sealing butterfly valve has the advantages that the valve rod and the valve plate are eccentric, the sealing surfaces of the valve plate and the valve seat are in the shape of an inclined circular truncated cone (the third eccentric of the three eccentricities), but the thickness of the valve plate is thickened along with the increase of the eccentric number of the valve plate, and the resistance of fluid flowing through the three-eccentric butterfly valve is increased; as the number of butterfly valve eccentricities increases, the valve performance also varies greatly.

The three-eccentric metal sealing butterfly valve has the advantages that the sealing reliability is low, the opening angle of the sealing surface is small when the three-eccentric metal sealing butterfly valve is opened and closed, and the abrasion of the sealing surface is large. To this end, we propose a triple offset butterfly valve.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a three-eccentric sealing butterfly valve.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a three-eccentric seal butterfly valve comprises a valve seat, a transmission device and a butterfly plate;

the middle part of the valve seat is rotatably provided with a valve shaft, the valve shaft extends to the middle part of the valve seat and is connected with a butterfly plate, and the butterfly plate is an entity with an elliptic section and a certain thickness and is matched with a channel formed by the valve seat;

the outer ring surfaces of the butterfly plates are respectively sleeved with a sealing ring, the outer parts of the butterfly plates, corresponding to the sealing rings, are sleeved with a pressing plate to form covering pressing for the sealing rings, and the outer ring surfaces of the sealing rings extend to the butterfly plates to be in contact with the inner wall of the valve seat;

a transmission device is installed at the upper end of the valve seat, a rotating rod is rotatably arranged on one side of the transmission device, and a hand wheel is installed at one end, extending to the outside, of the rotating rod.

Preferably, the transmission device is a worm gear transmission structure, and the transmission device is pivoted with the valve shaft through an internal worm gear structure.

Preferably, a support is installed at the upper end of the valve seat, filler is jointly arranged on the lower side of the inner wall of the joint of the valve seat and the support, and a gland is installed at the lower end of the inner wall of the support corresponding to the filler.

Preferably, the lower end of the valve seat is provided with an end cover, and the end cover is connected with the valve seat through an inner hexagon bolt.

Preferably, a gasket is installed between the valve seat and the end cover together, and the gasket forms a tight connection between the valve seat and the end cover.

Preferably, when the hand wheel rotates, the valve shaft is further driven to rotate through a worm gear structure in the transmission device, so that the butterfly plate rotates.

The utility model provides a pair of three eccentric seal butterfly valves, beneficial effect lies in:

1. the three-eccentric metal sealing structure is adopted, so that the sealing automatic compensation effect is realized, and the sealing reliability is good;

2. when the butterfly plate is opened and closed, the opening angle of the sealing surface is large, the abrasion of the sealing surface is small, and the friction torque is small;

3. the structure is reasonable in design, long in service life, small in driving torque, flexible in operation and quick in opening and closing;

4. the volume is small, the weight is light, and the installation is convenient;

5. the range of applicable media is wide: water, seawater, oil, air, coal gas, steam and other media can be used.

Drawings

Fig. 1 is a schematic cross-sectional view of a front view structure of a triple eccentric seal butterfly valve according to the present invention;

fig. 2 is a side sectional view of a triple eccentric seal butterfly valve according to the present invention;

fig. 3 is a schematic structural diagram of a butterfly plate of a triple offset seal butterfly valve according to the present invention;

fig. 4 is a side sectional view of a butterfly plate of a triple offset seal butterfly valve according to the present invention;

fig. 5 is a partial structural cross-sectional view of a valve seat of a triple offset butterfly valve according to the present invention.

In the figure: 1. an end cap; 2. a gasket; 3. a valve seat; 4. a hexagon socket head cap screw; 5. a butterfly plate; 6. pressing a plate; 7. a support; 8. a filler; 9. a transmission device; 10. a gland; 11. a seal ring; 12. a hand wheel; 13. a rotating rod; 14. a valve shaft.

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.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1-5, a triple offset seal butterfly valve includes a valve seat 3, a transmission 9, and a butterfly plate 5;

the middle part of the valve seat 3 is rotatably provided with a valve shaft 14, the valve shaft 14 extends to the middle part of the valve seat 3 and is connected with a butterfly plate 5, and the butterfly plate 5 is an entity with an elliptic section with a certain thickness and is matched with a channel formed by the valve seat 3;

the outer ring surface of the butterfly plate 5 is sleeved with a sealing ring 11, the outer part of the butterfly plate 5 corresponding to the sealing ring 11 is sleeved with a pressing plate 6 to form covering pressing for the sealing ring 11, and the outer ring surface of the sealing ring 11 extends to the position where the butterfly plate 5 is contacted with the inner wall of the valve seat 3;

the upper end of the valve seat 3 is provided with a transmission device 9, one side of the transmission device 9 is rotatably provided with a rotating rod 13, and one end of the rotating rod 13 extending to the outside is provided with a hand wheel 12.

The transmission device 9 is of a worm gear transmission structure, the transmission device 9 is pivoted with the valve shaft 14 through an internal worm gear structure, and when the hand wheel 12 rotates, the valve shaft 14 is further driven to rotate through the internal worm gear structure of the transmission device 9, so that the butterfly plate 5 is rotated.

A support 7 is installed at the upper end of a valve seat 3, a filler 8 is jointly arranged on the lower side of the inner wall of the joint of the valve seat 3 and the support 7, a gland 10 is installed at the lower end of the inner wall of the support 7 corresponding to the filler 8, an end cover 1 is installed at the lower end of the valve seat 3, the end cover 1 is connected with the valve seat 3 through a hexagon socket head cap screw 4, a gasket 2 is jointly installed between the valve seat 3 and the end cover 1, and the gasket 2 forms tight connection between the valve seat 3 and the end cover 1.

The use principle and the advantages are as follows: when the valve is closed, the butterfly plate 5 is pushed forward due to eccentricity, at the moment, the butterfly plate 5 and the valve seat 3 do not generate friction in the closing process, and the butterfly plate 5 is directly pressed on the valve seat 3, so that the valve seat 3 is prevented from being damaged, and the service life is prolonged; because the sealing ring 11 (no matter arranged on a valve seat or a valve plate) has certain elasticity, and a small amount of clearance is reserved between the boss in the sealing ring 11 and the sealing ring 11, the sealing ring 11 can slightly displace in the opening and closing process of the butterfly plate 5; when the valve is closed, the sealing ring 11 can automatically move to the position with the most uniform stress under the action of closing force, so that uniform filling is realized, and the sealing ring at the valve seat is uniformly stressed by combining with a small amount of deformation of the sealing ring 11, so that the optimal sealing state is achieved;

to sum up: the very reliable sealing performance when the valve is closed has been realized through the sealing washer 11 isotructures of butterfly plate department, and the medium flow rate when the butterfly plate is close to close is high, is slick and sly curved surface shape, can avoid appearing the phenomenon that the plug blockked up the valve.

The above, only be the embodiment of the preferred of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, which are designed to be replaced or changed equally, all should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a three eccentric seal butterfly valves which characterized in that: comprises a valve seat (3), a transmission device (9) and a butterfly plate (5);

a valve shaft (14) is rotatably mounted in the middle of the valve seat (3), the valve shaft (14) extends to the middle of the valve seat (3) and is connected with a butterfly plate (5), and the butterfly plate (5) is an entity with an oval section and a certain thickness and is matched with a channel formed by the valve seat (3);

the outer ring surfaces of the butterfly plates (5) are respectively sleeved with a sealing ring (11), the outer parts, corresponding to the sealing rings (11), of the butterfly plates (5) are sleeved with a pressing plate (6) to form wrapping pressing for the sealing rings (11), and the outer ring surfaces of the sealing rings (11) extend to the butterfly plates (5) to be in contact with the inner wall of the valve seat (3);

transmission device (9) are installed to the upper end of disk seat (3), one side of transmission device (9) is rotated and is provided with bull stick (13), hand wheel (12) are installed to the one end that bull stick (13) extend to the outside.

2. A triple offset sealing butterfly valve according to claim 1, characterised in that the gear (9) is a worm gear, the gear (9) being pivotally connected to the valve shaft (14) via an internal worm gear.

3. A three-eccentric sealing butterfly valve according to claim 1, characterized in that a support (7) is installed at the upper end of the valve seat (3), a packing (8) is arranged on the lower side of the inner wall of the joint of the valve seat (3) and the support (7) together, and a gland (10) is installed at the lower end of the inner wall of the support (7) corresponding to the packing (8).

4. A triple offset sealed butterfly valve according to claim 1, characterized in that the lower end of the valve seat (3) is provided with an end cap (1), and the end cap (1) is connected with the valve seat (3) through a hexagon socket head cap bolt (4).

5. A triple offset sealed butterfly valve according to claim 4, characterized in that a gasket (2) is jointly mounted between the valve seat (3) and the end cover (1), said gasket (2) forming a tight connection between the valve seat (3) and the end cover (1).

6. A triple offset sealed butterfly valve according to claim 2, characterized in that when the hand wheel (12) is rotated, the worm gear structure inside the transmission device (9) further drives the valve shaft (14) to rotate, so that the butterfly plate (5) is rotated.