CN219035570U

CN219035570U - High leakproofness butterfly valve

Info

Publication number: CN219035570U
Application number: CN202222783096.6U
Authority: CN
Inventors: 陈俊宇; 杨勇; 杨馥宇
Original assignee: Zhejiang Chuangxiang Valve Technology Co ltd
Current assignee: Zhejiang Chuangxiang Valve Technology Co ltd
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2023-05-16
Anticipated expiration: 2032-10-21

Abstract

The utility model discloses a high-tightness butterfly valve, which relates to the technical field of valves and comprises a valve body, a valve seat, a valve rod, a butterfly plate and a worm gear, wherein the butterfly plate is arranged in an inner cavity of the valve body by taking the valve rod as a vertical support, a metal sealing ring is embedded at the outer edge of the butterfly plate, the valve seat is of a floating structure, the valve seat is axially arranged in the inner cavity of the valve body, the butterfly plate is mutually matched with a four-ring opening, a pressing plate, a graphite ring and the valve seat, the valve body, the valve rod and the butterfly plate form a three-eccentric structure, and the butterfly plate is fixedly arranged on the valve rod by cylindrical pins. The butterfly valve with high tightness comprises a valve body, a valve seat, a valve rod, a butterfly plate and a worm gear, wherein the butterfly plate is arranged in an inner cavity of the valve body by taking the valve rod as a vertical support, a piston effect causes the floating valve seat to displace along with the butterfly plate at the same time, a sealing surface is tightly combined under the piston effect, a graphite ring sealing structure is combined with the valve seat, the sealing is more tight, a bearing support is arranged at the end part of the valve rod, the axial movement is effectively prevented, and the structural design is humanized.

Description

High leakproofness butterfly valve

Technical Field

The utility model relates to the technical field of valves, in particular to a high-tightness butterfly valve.

Background

The butterfly valve is also called as flap valve, and is a simple-structure regulating valve, and can be used for controlling the opening and closing of low-pressure pipeline medium, and the butterfly valve is a valve in which a closing member (a valve clack or a butterfly plate) is a disc and rotates around a valve shaft to achieve opening and closing, and the valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive mediums, slurry, oil products, liquid metal, radioactive mediums and the like, and mainly has the functions of cutting off and throttling on a pipeline.

The existing butterfly valve is widely applied to industrial pipelines such as metallurgy, electric power, petrochemical industry, water supply and drainage, municipal construction and the like, and is used for adjusting flow and carrying flow cut-off bodies, however, the existing traditional butterfly valve is influenced by the structure of the butterfly valve and can only bear pressure and seal forward, and the sealing effect is poor, so that internal media are easy to leak in the use process.

Disclosure of Invention

The utility model aims to provide a high-tightness butterfly valve, which overcomes the defects of the prior art, when a butterfly plate is displaced, a piston effect causes a floating valve seat to be displaced along with the butterfly plate, a sealing surface is tightly combined under the piston effect, and a graphite ring sealing structure is combined with the valve seat to seal more tightly.

In order to solve the problems, the technical scheme adopted by the utility model is as follows:

a high tightness butterfly valve, comprising

Valve body, disk seat, valve rod, butterfly plate and worm gear, the butterfly plate is installed in the valve body inner chamber by the valve rod as vertical support, metal seal circle is inlayed to the butterfly plate outer fringe, the disk seat is floating structure, the disk seat axial is installed in the valve body inner chamber, the butterfly plate coincides each other with four ring-opening, clamp plate, graphite ring and disk seat, three eccentric structures are constituteed to valve body, valve rod and butterfly plate three, the butterfly plate is by cylindric lock fixed mounting on the valve rod, valve rod one end surface is equipped with down the axle sleeve, the valve rod other end surface is equipped with the axle sleeve.

Further, the valve rod end is equipped with plane thrust bearing, plane thrust bearing below is equipped with and caps, cap mounting in the valve rod surface, the valve rod lower surface is equipped with the end cover, the end cover top is equipped with first gasket, the end cover lower surface is equipped with the keyhole, the inside first hexagon socket head cap bolt that is equipped with of keyhole.

Further, the upper surface of the valve body is provided with a support, and the upper end of the support is connected with the valve body through a first hexagonal nut.

Further, first hexagonal nut outside swing joint is equipped with first stud, the support lower extreme passes through the second hexagonal nut with the valve body and is connected, second hexagonal nut outside swing joint is equipped with the second stud.

Further, the upper end of the valve rod is provided with a flat key, a filler body is arranged between the valve rod and the valve body, a filler gland is arranged above the filler body, and the lower surface of the filler gland is connected with the upper surface of the valve body.

Further, the packing gland is connected with the valve body through a third hexagonal nut, a third stud is movably connected to the outside of the third hexagonal nut, and a gasket is arranged between the third hexagonal nut and the packing gland.

Further, be equipped with third hexagon socket head cap screw below the graphite ring, the butterfly plate outside is equipped with the clamping ring, the clamping ring inboard is equipped with second gasket and stainless steel sheet, second gasket and stainless steel sheet below are equipped with second hexagon socket head cap screw, four switch ring below is equipped with hexagon flat end holding screw.

Compared with the prior art, the utility model has the following beneficial effects:

when the medium is pressurized by the sealing end which is unfavorable for the valve, the forced force for closing the valve is weakened due to the displacement and micro deformation of the valve rod and the butterfly plate, the necessary sealing ratio is reduced, when the butterfly plate is displaced, the piston effect causes the floating valve seat to simultaneously displace along with the butterfly plate, the sealing surface is tightly combined under the piston effect, the graphite ring sealing structure is combined with the valve seat, and the sealing is tighter.

The utility model is composed of a valve body, a valve seat, a valve rod, a butterfly plate and a worm gear, wherein the butterfly plate is arranged in the inner cavity of the valve body by taking the valve rod as a vertical support, a metal sealing ring is embedded at the outer edge of the butterfly plate, the valve seat is of a floating structure, and the end part of the valve rod is provided with a bearing support, so that the axial movement is effectively prevented, and the structural design is humanized.

Drawings

FIG. 1 is a schematic diagram of a high-tightness butterfly valve;

fig. 2 is an enlarged view of a portion of the high seal butterfly valve of fig. 1 at a.

In the figure: 1. an end cap; 2. a first socket head cap screw; 3. a first gasket; 4. and then is impersonated; 5. a planar thrust bearing; 6. a valve body; 7. a lower shaft sleeve; 8. a butterfly plate; 9. a cylindrical pin; 10. a valve stem; 11. an upper shaft sleeve; 12. a second stud bolt; 13. a bracket; 14. a second hex nut; 15. a first hex nut; 16. a first stud bolt; 17. a worm gear device; 18. a flat key; 19. a third hex nut; 20. a gasket; 21. a packing gland; 22. a third stud bolt; 23. a filler body; 24. a graphite ring; 25. a third socket head cap screw; 26. a second gasket; 27. stainless steel sheet; 28. a pressing ring; 29. a second socket head cap screw; 30. a valve seat; 31. a pressing plate; 32. a fourth ring opening; 33. the inner hexagonal flat end is provided with a set screw.

Detailed Description

The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to FIGS. 1-2, the present utility model is a high-tightness butterfly valve, comprising

Valve body 6, disk seat 30, valve rod 10, butterfly plate 8 and worm gear 17, butterfly plate 8 regard as vertical support by valve rod 10 to install in valve body 6 inner chamber, metal seal circle is inlayed to butterfly plate 8 outer fringe, disk seat 30 is floating structure, disk seat 30 axial installation is in valve body 6 inner chamber, butterfly plate 8 and quarto ring 32, clamp plate 31, graphite ring 24 and disk seat 30 coincide each other, the three eccentric structure of valve body 6, valve rod 10 and butterfly plate 8 three constitution, butterfly plate 8 is by cylindric lock 9 fixed mounting on valve rod 10, valve rod 10 one end surface is equipped with down axle sleeve 7, valve rod 10 other end surface is equipped with axle sleeve 11.

When the valve is used, the worm gear 17 inputs torque angular travel through the valve rod 10 and then drives the butterfly plate 8 to perform rotary motion, so that the purposes of connecting a flow channel and closing the flow channel are achieved, after the valve is closed, when a medium is pressed to the butterfly plate 8 from the forward direction, the valve seat 30 is fixed by the four-way ring 32 and the pressing plate 31, the sealing ring of the butterfly plate 8 is tightly combined with the valve seat 30, the forced force input by the worm gear 17 and the medium promote the valve to seal, when the medium is pressed by the sealing end which is unfavorable for the valve, the forced force for closing the valve is weakened due to the displacement and micro deformation of the valve rod 10 and the butterfly plate 8, the sealing ratio is reduced, when the butterfly plate 8 is displaced, the piston effect causes the floating valve seat 30 to simultaneously displace along with the butterfly plate 8, the sealing surface is tightly combined under the piston effect, the valve is sealed, and the sealing effect is good, and the bidirectional sealing is realized.

The end of the valve rod 10 is provided with a plane thrust bearing 5, a cap 4 is arranged below the plane thrust bearing 5 and is arranged on the outer surface of the valve rod 10, the lower surface of the valve rod 10 is provided with an end cover 1, a first gasket 3 is arranged above the end cover 1, the lower surface of the end cover 1 is provided with a bolt hole, and a first hexagon socket head cap bolt 2 is arranged inside the bolt hole.

The upper surface of valve body 6 is equipped with support 13, and support 13 upper end is connected through first hexagon nut 15 with valve body 6.

The first hexagonal nut 15 is externally and movably connected with a first stud 16, the lower end of the bracket 13 is connected with the valve body 6 through a second hexagonal nut 14, and the second hexagonal nut 14 is externally and movably connected with a second double-head bolt 12.

The upper end of the valve rod 10 is provided with a flat key 18, a packing body 23 is arranged between the valve rod 10 and the valve body 6, a packing gland 21 is arranged above the packing body 23, and the lower surface of the packing gland 21 is connected with the upper surface of the valve body 6.

The packing gland 21 is connected with the valve body 6 through a third hexagonal nut 19, a third stud 22 is movably connected to the outside of the third hexagonal nut 19, and a gasket 20 is arranged between the third hexagonal nut 19 and the packing gland 21.

A third inner hexagon bolt 25 is arranged below the graphite ring 24, a pressing ring 28 is arranged outside the butterfly plate 8, a second gasket 26 and a stainless steel sheet 27 are arranged on the inner side of the pressing ring 28, a second inner hexagon bolt 29 is arranged below the second gasket 26 and the stainless steel sheet 27, and an inner hexagon flat end set screw 33 is arranged below the four-way ring 32.

The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A high tightness butterfly valve, characterized in that: including valve body (6), disk seat (30), valve rod (10), butterfly plate (8) and worm gear (17), butterfly plate (8) are installed in valve body (6) inner chamber as vertical support by valve rod (10), metal seal circle is inlayed to butterfly plate (8) outer fringe, disk seat (30) are floating structure, disk seat (30) axial mounting is in valve body (6) inner chamber, butterfly plate (8) coincide each other with four open loop (32), clamp plate (31), graphite ring (24) and disk seat (30), three eccentric structures are constituteed to valve body (6), valve rod (10) and butterfly plate (8) three, butterfly plate (8) are by cylindric lock (9) fixed mounting on valve rod (10), valve rod (10) one end surface is equipped with lower axle sleeve (7), valve rod (10) other end surface is equipped with axle sleeve (11).

2. The high tightness butterfly valve of claim 1, wherein: the end part of the valve rod (10) is provided with a plane thrust bearing (5), the lower part of the plane thrust bearing (5) is provided with a cap (4), the cap (4) is arranged on the outer surface of the valve rod (10), the lower surface of the valve rod (10) is provided with an end cover (1), a first gasket (3) is arranged above the end cover (1), the lower surface of the end cover (1) is provided with a bolt hole, and a first hexagon socket head cap bolt (2) is arranged inside the bolt hole.

3. The high tightness butterfly valve of claim 1, wherein: the upper surface of the valve body (6) is provided with a bracket (13), and the upper end of the bracket (13) is connected with the valve body (6) through a first hexagonal nut (15).

4. A high tightness butterfly valve according to claim 3, wherein: the novel valve is characterized in that a first stud (16) is movably connected to the outside of the first hexagonal nut (15), the lower end of the bracket (13) is connected with the valve body (6) through a second hexagonal nut (14), and a second double-head bolt (12) is movably connected to the outside of the second hexagonal nut (14).

5. The high tightness butterfly valve of claim 1, wherein: the valve is characterized in that a flat key (18) is arranged at the upper end of the valve rod (10), a filler body (23) is arranged between the valve rod (10) and the valve body (6), a filler gland (21) is arranged above the filler body (23), and the lower surface of the filler gland (21) is connected with the upper surface of the valve body (6).

6. The high-tightness butterfly valve of claim 5, wherein: the packing gland (21) is connected with the valve body (6) through a third hexagonal nut (19), a third stud (22) is movably connected to the outside of the third hexagonal nut (19), and a gasket (20) is arranged between the third hexagonal nut (19) and the packing gland (21).

7. The high tightness butterfly valve of claim 1, wherein: the graphite ring (24) below is equipped with third hexagon socket head cap screw (25), butterfly plate (8) outside is equipped with clamping ring (28), clamping ring (28) inboard is equipped with second gasket (26) and stainless steel sheet (27), second gasket (26) and stainless steel sheet (27) below are equipped with second hexagon socket head cap screw (29), four opening ring (32) below is equipped with hexagon flat end holding screw (33).