CN211852831U

CN211852831U - Bidirectional sealing butterfly valve

Info

Publication number: CN211852831U
Application number: CN202020328253.2U
Authority: CN
Inventors: 吴彦武
Original assignee: Henan Zhong Yue Valve Manufacturing Co ltd
Current assignee: Henan Zhong Yue Valve Manufacturing Co ltd
Priority date: 2020-03-17
Filing date: 2020-03-17
Publication date: 2020-11-03
Anticipated expiration: 2030-03-17

Abstract

The utility model discloses a two-way seal butterfly valve, including valve body, disk seat, two-way passageway, butterfly plate, pressure disk and valve shaft, be equipped with sealed rubber ring between disk seat and the butterfly plate, sealed rubber ring passes through the pressure disk to be fixed on the disk seat, still including setting up respectively the support and the bottom at both ends about the valve body, be equipped with last copper sheathing and the lower copper sheathing that is located both sides about the two-way passageway respectively on the valve body, the upper and lower both ends of valve shaft are passed copper sheathing and lower copper sheathing respectively and are connected rather than rotating, the valve shaft upper end is extended the support and is equipped with the parallel key that is used for connecting actuating mechanism, the radial cross-section of sealed rubber ring is type, the axial cross-section of sealed rubber ring is ring shape, a plurality of seal groove has been seted up on the lateral wall of sealed rubber ring and the radial laminating of disk seat inside wall. Two-way seal butterfly valve have that sealing performance is good, simple structure, do not produce advantages such as leakage clearance.

Description

Bidirectional sealing butterfly valve

Technical Field

The utility model relates to a butterfly valve structure field particularly, relates to a two way seal butterfly valve.

Background

The butterfly valve is a valve which uses a disc type opening and closing piece (namely a butterfly plate) to rotate back and forth by about 90 degrees to open, close or adjust the medium flow. The butterfly valve has the advantages of simple structure, small volume, light weight, less material consumption, small installation size, small driving moment, simple and quick operation, and good flow regulation function and closing and sealing characteristics.

At present, most butterfly valves are in one-way sealing, sealing pairs of the butterfly valves are in line contact sealing, and elastic deformation caused by extrusion of a metal valve seat sealing ring through a butterfly plate generates a sealing effect. When medium pressure acts, if the deformation of the valve seat sealing ring is uneven, the butterfly plate is separated from the valve seat easily or the sealing specific pressure between the butterfly plate and the valve seat sealing ring is insufficient to cause sealing failure, and when the medium flows in the reverse direction and the medium pressure is large, the pressure can push the butterfly plate to have displacement, so that a gap is formed between the butterfly plate and the valve seat to cause leakage.

SUMMERY OF THE UTILITY MODEL

For solving the problem that exists among the prior art, the utility model provides a two-way seal butterfly valve has advantages such as sealing performance is good, simple structure, do not produce the leakage clearance.

In order to achieve the above object, the utility model adopts the following technical scheme: a two-way sealing butterfly valve comprises a valve body, a valve seat, a two-way channel, a butterfly plate, a pressure plate and a valve shaft, wherein a sealing rubber ring is arranged between the valve seat and the butterfly plate and fixed on the valve seat through the pressure plate, the two-way sealing butterfly valve also comprises a support and a bottom cover which are respectively arranged at the upper end and the lower end of the valve body, an upper copper sleeve and a lower copper sleeve which are respectively arranged at the upper side and the lower side of the two-way channel are arranged on the valve body, the upper end and the lower end of the valve shaft respectively penetrate through the upper copper sleeve and the lower copper sleeve and are rotationally connected with the upper copper sleeve and the lower copper sleeve, the upper end of the valve shaft extends out of the support and is provided with a flat key for connecting a driving mechanism, the radial section of the sealing rubber ring is in a convex shape, the axial section of the sealing rubber ring is in a ring shape, a plurality of, the circular groove is formed in the radial outer side wall of the pressure plate and corresponds to the sealing protrusion, the inner convex head, which is in contact with the butterfly plate, of the sealing rubber ring is three inclined planes, the inclined planes in the middle are parallel to the conical surface of the butterfly plate and are attached together, and the inclined planes on the two sides and the included angle of the conical surface of the butterfly plate are acute angles.

In the structure, when the sealing device is used, the sealing rubber ring is sleeved on the pressure plate, the sealing bulge of the sealing rubber ring is embedded with the circular groove of the pressure plate, and then the sealing rubber ring is arranged in the valve seat and is fixed through the pressure plate; when the butterfly plate is in a closed state, the middle inclined plane of the inner convex head of the sealing rubber ring is attached to the outer side surface of the butterfly plate; the torque transmitted by the valve shaft enables sufficient sealing specific pressure to be generated between the sealing surfaces of the butterfly plate and the valve seat, so that the valve is sealed, when the left side of the butterfly plate is a medium high-pressure side, namely the butterfly plate bears positive pressure, the inner convex head of the sealing rubber ring is bent towards the right side by means of the medium pressure, the left side inclined surface of the inner convex head is tightly pressed on the sealing surface of the butterfly plate, and good sealing performance is guaranteed; when the medium is reversed, the medium pressure acts on the other side of the sealing rubber ring, the sealing rubber ring generates reverse deformation, the inclined plane on the right side of the sealing rubber ring is attached to the sealing surface of the butterfly plate, and because an acute included angle exists between the sealing surface of the butterfly plate and the inner convex head of the sealing rubber ring, the sealing ring is pressed on the sealing surface of the valve plate to form specific sealing pressure to prevent the medium from leaking, so that the sealing performance of the valve can be ensured in both the forward direction and the reverse direction; the sealing ring on the sealing rubber ring can further realize outside sealing, and the phenomenon of leakage caused by deformation of the sealing rubber ring is prevented.

Preferably, the sealing rubber ring is made of soft rubber.

The sealing rubber ring made of soft rubber has better sealing effect.

Preferably, a plurality of O-shaped rings are arranged in the upper copper sleeve and the lower sleeve.

The O-shaped ring is arranged for realizing mechanical sealing between the upper sleeve (or the lower copper sleeve).

Preferably, a packing gland is arranged between the support and the valve body, the packing gland is sleeved on the valve shaft, and the packing gland is connected with the valve body through a bolt.

The packing gland facilitates the disassembly and assembly of components inside the valve body and plays a supporting role in the valve shaft.

Preferably, a bottom cap gasket is provided between the bottom cap and the valve body.

The bottom head gasket plays a role in increasing friction force and can reduce abrasion.

Preferably, a puller bolt is arranged in the middle of the bottom cover, and the tail end of the puller bolt is in contact with the lower end of the valve shaft.

The puller bolt can play the tight effect in top to the valve shaft to can adjust the elasticity of valve shaft installation.

The utility model has the advantages that:

(1) the butterfly valve has the function of bidirectional sealing by arranging the three inclined planes on the inner convex head of the sealing rubber ring, and the three inclined planes on the inner convex head have simple structure and low production cost;

(2) through the setting of the sealed arch of sealed rubber ring and sealing washer, further improved the sealed effect of sealed rubber ring, prevent because the deformation of sealed rubber ring, produce the gap of leaking the mobile medium, influence sealed effect.

Drawings

Fig. 1 is a front view semi-sectional view of embodiment 1 of the present invention;

fig. 2 is a right side view of embodiment 1 of the present invention;

FIG. 3 is an enlarged schematic view of A in FIG. 1;

fig. 4 is a front half-section view of embodiment 2 of the present invention.

Description of reference numerals:

1. a valve body; 2. a butterfly plate; 3. a valve shaft; 4. sealing the rubber ring; 5. a platen; 6. mounting a copper sleeve; 7. a copper bush is arranged; 8. a packing gland; 9. a bottom cover; 10. a support; 11. an O-shaped ring; 12. a bottom cover pad; 13. a taper pin; 14. jacking the bolt; 15. a flat bond; 16. sealing the protrusion; 17. a sealing groove; 18. a seal ring; 19. a valve seat; 20. a bi-directional channel.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example 1:

as shown in fig. 1-3, a two-way sealing butterfly valve comprises a valve body 1, a valve seat 19, a two-way channel 20, a butterfly plate 2, a pressure plate 5 and a valve shaft 3, wherein a sealing rubber ring 4 is arranged between the valve seat 19 and the butterfly plate 2, the sealing rubber ring 4 is fixed on the valve seat 19 through the pressure plate 5, the upper end and the lower end of the valve body 1 are respectively provided with a support 10 and a bottom cover 9 through bolts, the valve body 1 is provided with an upper copper sleeve 6 and a lower copper sleeve 7 which are respectively arranged at the upper side and the lower side of the two-way channel 20, the upper copper sleeve 6 and the lower copper sleeve 7 play roles of rotation protection and friction coefficient reduction, the upper end and the lower end of the valve shaft 3 respectively penetrate through the upper copper sleeve 6 and the lower copper sleeve 7 and are rotatably connected with the upper copper sleeve 1, the upper end of the valve shaft 3 extends out of the support 10 and is provided with a flat key 15 for connecting a driving mechanism, the radial cross section, be equipped with sealing washer 18 in the seal groove 17, sealing washer 18 is the annular, be equipped with two sealed archs 16 on the inside wall of sealed rubber ring 4 and the radial laminating of pressure disk 5, it has seted up the circular slot to correspond sealed archs 16 on the radial lateral wall of pressure disk 5, the circular slot conveniently cooperatees with sealed archs 16, the interior convex head that sealed rubber ring 4 and butterfly plate 2 contacted is three inclined plane, the inclined plane that is located the centre parallels and pastes together with the conical surface of butterfly plate 2, the inclined plane that is located both sides all is the acute angle with the contained angle of the conical surface of butterfly plate 2, the angular range of acute angle is 20-45.

The seal rubber ring 4 is made of soft rubber. The sealing rubber ring 4 made of soft rubber has better sealing effect. Three O-shaped rings 11 are arranged in the upper copper sleeve 6 and the lower sleeve. The provision of the O-ring 11 serves to effect a mechanical seal between the upper sleeve (or lower copper bush 7). A packing gland 8 is arranged between the support 10 and the valve body 1, the packing gland 8 is sleeved on the valve shaft 3, and the packing gland 8 is connected with the valve body 1 through a bolt. The packing gland 8 facilitates the assembly and disassembly of components inside the valve body 1 and plays a supporting role in the valve shaft 3. A bottom cover gasket 12 is arranged between the bottom cover 9 and the valve body 1. The bottom head gasket 12 serves to increase friction while reducing wear.

In the structure, when in use, the sealing rubber ring 4 is sleeved on the pressure plate 5, the sealing bulge 16 of the sealing rubber ring 4 is embedded with the circular groove of the pressure plate 5, and then the sealing rubber ring 4 is arranged in the valve seat 19 and is fixed by the pressure plate 5; when the butterfly plate 2 is in a closed state, the middle inclined plane of the inner convex head of the sealing rubber ring 4 is attached to the outer side surface of the butterfly plate 2; the torque transmitted by the valve shaft 3 enables the sealing surface of the butterfly plate 2 and the valve seat 19 to generate enough sealing specific pressure so as to seal the valve, when the left side of the butterfly plate 2 is a medium high-pressure side, namely the butterfly plate 2 bears positive pressure, the inner convex head of the sealing rubber ring 4 is bent towards the right side by means of the medium pressure, and the left inclined surface of the inner convex head is tightly pressed on the sealing surface of the butterfly plate 2, so that good sealing performance is ensured; when the medium is reversed, the medium pressure acts on the other side of the sealing rubber ring 4, the sealing rubber ring 4 generates reverse deformation, the inclined plane on the right side of the sealing rubber ring 4 is attached to the sealing surface of the butterfly plate 2, and because an acute included angle exists between the sealing surface of the butterfly plate 2 and the inner convex head of the sealing rubber ring 4, the sealing ring 18 is pressed on the sealing surface of the valve plate to form specific sealing pressure to prevent the medium leakage, so that the sealing performance of the valve can be ensured in both the forward direction and the reverse direction; the sealing ring 18 on the sealing rubber ring 4 can further realize outside sealing, and the phenomenon of leakage caused by deformation of the sealing rubber ring 4 is prevented.

Example 2:

as shown in fig. 4, in this embodiment, on the basis of embodiment 1, a tightening bolt 14 is provided at a middle position of the bottom cover 9, and a tip of the tightening bolt 14 contacts with a lower end of the valve shaft 3. The tightening bolt 14 can exert a tightening action on the valve shaft 3, and can adjust the tightness of the installation of the valve shaft 3.

Embodiment 2 the rest of the structure and the operation principle are the same as those of embodiment 1.

The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. A two-way sealing butterfly valve comprises a valve body, a valve seat, a two-way channel, a butterfly plate, a pressure plate and a valve shaft, wherein a sealing rubber ring is arranged between the valve seat and the butterfly plate and is fixed on the valve seat through the pressure plate, the two-way sealing butterfly valve is characterized by further comprising a support and a bottom cover which are respectively arranged at the upper end and the lower end of the valve body, an upper copper sleeve and a lower copper sleeve which are respectively arranged at the upper side and the lower side of the two-way channel are arranged on the valve body, the upper end and the lower end of the valve shaft respectively penetrate through the upper copper sleeve and the lower copper sleeve and are rotatably connected with the upper copper sleeve and the lower copper sleeve, the support is extended out of the upper end of the valve shaft and is provided with a flat key for connecting a driving mechanism, the radial section of the sealing rubber ring is in a convex shape, the axial section of the sealing rubber ring is in a circular ring shape, a, the circular groove is formed in the radial outer side wall of the pressure plate and corresponds to the sealing protrusion, the inner convex head, which is in contact with the butterfly plate, of the sealing rubber ring is three inclined planes, the inclined planes in the middle are parallel to the conical surface of the butterfly plate and are attached together, and the inclined planes on the two sides and the included angle of the conical surface of the butterfly plate are acute angles.

2. The bidirectional seal butterfly valve of claim 1, wherein the sealing rubber ring is made of a soft rubber.

3. The bidirectional sealing butterfly valve of claim 2, wherein a plurality of O-rings are disposed in each of the upper copper sleeve and the lower sleeve.

4. The bidirectional sealing butterfly valve of claim 3, wherein a packing gland is disposed between the support and the valve body, the packing gland is sleeved on the valve shaft, and the packing gland is connected to the valve body through a bolt.

5. The bidirectional sealing butterfly valve of claim 4, wherein a bottom cover gasket is disposed between the bottom cover and the valve body.

6. The butterfly valve of claim 5 wherein a top tightening bolt is provided at a middle position of the bottom cover, and a tip of the top tightening bolt contacts a lower end of the valve shaft.