CN213899934U

CN213899934U - Large-diameter fluorine-lined butterfly valve

Info

Publication number: CN213899934U
Application number: CN202022445646.4U
Authority: CN
Inventors: 陈炜; 许定舜; 许可业; 赵建军
Original assignee: SHANGHAI ANTICORROSIVE VALVE GROUP CO LTD
Current assignee: SHANGHAI ANTICORROSIVE VALVE GROUP CO LTD
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-08-06
Anticipated expiration: 2030-10-29

Abstract

The utility model relates to a large-diameter fluorine-lined butterfly valve, which comprises a valve body, a valve seat lining layer, a disc plate, an O-shaped sealing ring, a dustproof sealing ring and a driving device; the valve body is divided into an upper valve body and a lower valve body; the upper end of the disc plate is provided with a valve rod, and the lower end of the disc plate is provided with a valve rod shaft; the valve rod and the valve rod shaft are installed into a whole; after the valve rod and the valve rod shaft are installed into a whole, the outside of the valve rod and the valve rod shaft is wrapped with fluoroplastic; a valve plate lining layer is arranged on the disc plate, a valve seat lining layer is arranged on the valve body, the disc plate is arranged in the valve body, and a sealing structure is arranged between the valve rod and the valve rod shaft; the valve rod is connected with the driving device. The utility model discloses sealing performance is good, be convenient for maintenance, acid and alkali resistance are good.

Description

Large-diameter fluorine-lined butterfly valve

Technical Field

The utility model relates to a lining fluorine butterfly valve, concretely relates to big-calibre lining fluorine butterfly valve that sealing performance is good, be convenient for maintenance, acid and alkali resistance are good.

Background

Since the twenty-first century, the world petrochemical industry gradually shifted to china, china became the world major petrochemical production country, the crude oil processing capacity and the ethylene production capacity now live in the second place and the third place around the world, and further increase, and the imported valves are expensive and inconvenient to replace during maintenance.

The fluorine-lined plastic valve is researched and developed in the seventies of the last century, and due to the particularity of the valve structure, the initial fluorine-lined plastic valve is mainly focused on butterfly valves and ball valves which are simple in structure and cannot adapt to strong acid, strong base and solvent media of petrochemical pipelines. The Hastelloy, Monel and nickel-based alloys are invented later, the problem of petrochemical special pipeline transportation is solved, but the alloys contain a large amount of noble metals such as Ni, Cr, Nb, Ti and the like, and the metal resources are limited and the price is high.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide a large-diameter fluorine-lined butterfly valve which is easy to install, has good sealing performance, is convenient to maintain, and has good acid and alkali resistance.

The utility model discloses a solve above-mentioned technical problem through following technical scheme: a large-bore fluorine-lined butterfly valve, comprising: the valve comprises a valve body, a valve seat lining layer, a disc plate, a first O-shaped sealing ring, a dustproof sealing ring and a driving device; the valve body is divided into an upper valve body and a lower valve body; the upper end of the disc plate is provided with a valve rod, and the lower end of the disc plate is provided with a valve rod shaft; the valve rod and the valve rod shaft are installed into a whole; the valve rod and the valve rod shaft are installed into a whole and then the outside of the whole is wrapped with fluoroplastic lining.

A valve plate lining layer is arranged on the disc plate, a valve seat lining layer is arranged on the valve body, the disc plate is arranged in the valve body, and a sealing structure is arranged between the valve rod and the valve rod shaft; the valve rod is connected with the driving device.

In the specific embodiment of the utility model, the upper valve body is connected with the lower valve body by a countersunk bolt, and the valve body is internally provided with a rubber protecting plate and elastic fluororubber.

In a specific embodiment of the present invention, the driving device of the large-diameter fluorine-lined butterfly valve is an electric, pneumatic or hydraulic driving device.

In a specific embodiment of the present invention, the sealing structure between the valve rod and the valve rod shaft includes: and the second O-shaped sealing ring and the V-shaped packing have double sealing structures.

In the embodiment of the present invention, the dish plate is made of 25# steel plate.

In the specific embodiment of the utility model, valve rod and valve rod axle are the valve rod and the valve rod axle that form with 35# round steel processing.

In the embodiment of the present invention, the disc plate is provided with a plurality of small holes, the small holes are used for fixedly mounting the valve plate lining layer, and the corresponding positions on the valve plate lining layer are provided with protrusions.

In the embodiment of the present invention, the holes are circumferentially distributed, and the diameter of the holes ranges from 5mm to 8 mm.

The utility model discloses an among the concrete implementation example, be provided with the draw-in groove on the upper and lower outer flange of last valve body and lower valve body, on the valve seat backing layer extended to upper and lower outer flange, the valve seat backing layer was provided with the chucking structure, and the chucking structure is located the draw-in groove.

The utility model discloses an in the concrete embodiment, chucking structure is trapezoidal chucking structure, and the draw-in groove that corresponds also is trapezoidal draw-in groove, chucking structure's height range does: 1-5 mm.

The utility model discloses an actively advance the effect and lie in: compare conventional like product, the utility model provides a large-diameter lining fluorine butterfly valve, conventional butterfly valve body are circular integrative, the utility model discloses a design divide into upper and lower two parts with the valve body, adopts the countersunk head bolt to link upper and lower valve body together. The butterfly valve is mainly suitable for the technical requirements of a butterfly valve with a fluoroplastic lining, and is convenient for the installation of a valve seat lining layer, a rubber protecting plate, an elastic adhesive tape and a valve body bush.

The structure of the disc plate and the valve shaft: conventional butterfly valve disc plates are separate from the valve shaft design, typically keyed or pinned. If the fluoroplastic lining butterfly valve adopts the connection mode, the manufacturability of the fluorine lining butterfly valve is not good, and the use effect is also problematic. The connecting part of the disc plate and the valve shaft is in the repeated alternating stress process, the lining layer is easy to damage, the steel framework is corroded by corrosive media and fails, and therefore the service life of the valve is shortened, the disc plate and the valve shaft are designed to be connected through the valve, and the design and use effects are good.

The static electricity eliminating structure comprises: because fluoroplastics insulating properties is good, when opening and closing between dish board and the disk seat, the static that the friction produced is difficult to release, accumulates and can produce the spark more, causes the potential safety hazard to the pipeline. Therefore, the valve is designed into a static communication structure between the disc plate and the valve shaft and between the valve bodies, and is grounded through a pipeline, so that static accumulation is eliminated.

The general fluorine-lined butterfly valve is easy to leak at the dynamic sealing part between the valve shaft and the shaft hole of the valve body, which is a very headache for manufacturers and users. The valve adopts O-shaped sealing rings and V-shaped packing double-sealing structures, and achieves the 4-level sealing effect.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a cross-sectional view of the overall structure diagram of the present invention.

Fig. 3 is the structure diagram of the middle valve body of the present invention divided into the upper valve body and the lower valve body.

Fig. 4 is the structure diagram of the valve rod and the valve rod shaft of the present invention installed as a whole.

Fig. 5 is a schematic structural view of the middle dish plate of the present invention with a plurality of small holes.

Fig. 6 is a schematic structural diagram of the middle sealing structure of the present invention.

The utility model discloses the name that well reference numeral corresponds:

the valve comprises a valve body 1, a valve seat lining layer 2, a disc plate lining layer 3, a disc plate 4, a first O-shaped sealing ring 5, a dustproof sealing ring 6, a driving device 7, elastic fluororubber 8, a rubber protecting plate 9, a small hole 10, a second O-shaped sealing ring 11 and a V-shaped filler 12; upper valve body 101, lower valve body 102, valve stem 401, valve stem shaft 402.

Detailed Description

The following provides a preferred embodiment of the present invention with reference to the accompanying drawings to explain the technical solutions of the present invention in detail.

Fig. 1 is a schematic view of the overall structure of the present invention. Fig. 2 is a cross-sectional view of the overall structure diagram of the present invention. As shown in the above figures: the utility model provides a heavy-calibre lining fluorine butterfly valve, include: the valve comprises a valve body 1, a valve seat lining layer 2, a disc plate lining layer 3, a disc plate 4, a first O-shaped sealing ring 5, a dustproof sealing ring 6 and a driving device 7; the valve body 1 is divided into an upper valve body 101 and a lower valve body 102; the upper end of the disc plate 4 is provided with a valve rod 401, and the lower end is provided with a valve rod shaft 402; the valve rod and the valve rod shaft are installed into a whole; the valve rod and the valve rod shaft are installed into a whole and then the outside of the whole is wrapped with fluoroplastic lining.

A valve plate lining layer 3 is arranged on the disc plate 4, a valve seat lining layer 2 is arranged on the valve body 1, the disc plate 4 is arranged in the valve body 1, and a sealing structure is arranged between the valve rod and the valve rod shaft; the valve stem is connected to a drive means 7.

Fig. 3 is the structure diagram of the middle valve body of the present invention divided into the upper valve body and the lower valve body. Go up the valve body and meet with lower valve body for the countersunk head bolt, the utility model discloses an it protects offset plate 9 and elasticity fluororubber 8 to be equipped with in the valve body 1.

In the specific implementation process of the utility model, the driving device of the large-caliber fluorine-lined butterfly valve can be an electric, pneumatic or hydraulic driving device.

Fig. 6 is a schematic structural diagram of the middle sealing structure of the present invention. As shown in fig. 6: the seal structure between the valve stem and the valve stem shaft includes: and the second O-shaped sealing ring 11 and the V-shaped packing 12 are in double sealing structure.

The utility model provides a dish board that dish board was formed for the preparation of 25# steel sheet. The valve rod and the valve rod shaft are machined by 35# round steel. In a specific implementation, steel of other materials may also be used.

Fig. 5 is a schematic structural view of the middle dish plate of the present invention with a plurality of small holes. As shown in fig. 5: the dish board is provided with a plurality of apertures 10, and the aperture is used for fixed mounting valve plate backing layer 3, and the corresponding position is provided with the arch on the valve plate backing layer 3. The holes are circumferentially distributed holes 10, and in the specific application process, the diameter range of the holes is selected to be 5-8 mm.

In order to fix the valve seat lining layer 2 in the valve body stably, the upper and lower outer flanges of the upper valve body and the lower valve body are provided with clamping grooves, the valve seat lining layer 2 extends to the upper and lower outer flanges, the valve seat lining layer 2 is provided with a clamping structure, and the clamping structure is positioned in the clamping grooves. The chucking structure is trapezoidal chucking structure, and the draw-in groove that corresponds also is trapezoidal draw-in groove, and the altitude range of chucking structure does: 1-5 mm.

Casting 1 the valve body by using the casting model, wherein the valve body is tangent to half after being fully processed to form an upper valve body and a lower valve body. The upper end of the disc plate 4 is a valve rod part, and the lower end is a valve rod shaft; the disc plate material 25# steel plate, the valve rod and the valve rod shaft are processed by 35# round steel and are coated with fluoroplastic after being connected into a whole.

Connecting the upper valve body and the lower valve body by using a countersunk bolt, loading a rubber protecting plate and elastic fluororubber into the valve body, mounting a valve seat lining layer 2 on a disc plate, loading the disc plate into the valve body, and then installing a sealing structure of a valve rod and a valve rod shaft. The valve adopts a double sealing structure of an O-shaped sealing ring and a V-shaped packing, and achieves a 4-level sealing effect. The valve rod is connected with a driving device, and the driving device of the large-diameter valve mostly adopts an electric actuating mechanism and also adopts pneumatic and hydraulic driving.

The following supplementary description of the specific advantages of the present invention: the valve body of the conventional butterfly valve is circular and integrated, the valve body is divided into an upper part and a lower part by the design of the valve, and the upper valve body and the lower valve body are connected together by adopting a countersunk bolt. The butterfly valve is mainly suitable for the technical requirements of a butterfly valve with a fluoroplastic lining, and is convenient for the installation of a valve seat lining layer, a rubber protecting plate, an elastic adhesive tape and a valve body bush.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims and their equivalents.

Claims

1. A large-diameter fluorine-lined butterfly valve is characterized in that: the large-caliber fluorine-lined butterfly valve comprises: the valve comprises a valve body, a valve seat lining layer, a disc plate, a first O-shaped sealing ring, a dustproof sealing ring and a driving device; the valve body is divided into an upper valve body and a lower valve body; the upper end of the disc plate is provided with a valve rod, and the lower end of the disc plate is provided with a valve rod shaft; the valve rod and the valve rod shaft are installed into a whole; after the valve rod and the valve rod shaft are installed into a whole, the outside of the valve rod and the valve rod shaft is wrapped with fluoroplastic;

2. The large-caliber fluorine-lined butterfly valve according to claim 1, wherein: the upper valve body is connected with the lower valve body by a countersunk head bolt, and a rubber protecting plate and elastic fluororubber are arranged in the valve body.

3. The large-caliber fluorine-lined butterfly valve according to claim 1, wherein: the driving device of the large-caliber fluorine-lined butterfly valve is an electric, pneumatic or hydraulic driving device.

4. The large-caliber fluorine-lined butterfly valve according to claim 1, wherein: the seal structure between the valve stem and the valve stem shaft includes: and the second O-shaped sealing ring and the V-shaped packing have double sealing structures.

5. The large-caliber fluorine-lined butterfly valve according to claim 1, wherein: the dish board is made for 25# steel sheet.

6. The large-caliber fluorine-lined butterfly valve according to claim 1, wherein: the valve rod and the valve rod shaft are machined by 35# round steel.

7. The large-caliber fluorine-lined butterfly valve according to claim 1, wherein: the dish board is provided with a plurality of apertures, and the aperture is used for the fixed mounting valve plate backing layer, and the valve plate backing layer is last to correspond the position and be provided with the arch.

8. The large-caliber fluorine-lined butterfly valve according to claim 7, wherein: the small holes are distributed along the circumference, and the diameter range of the small holes is 5-8 mm.

9. The large-caliber fluorine-lined butterfly valve according to claim 1, wherein: the upper outer flange and the lower outer flange of the upper valve body and the lower valve body are provided with clamping grooves, the valve seat lining layer extends to the upper outer flange and the lower outer flange, the valve seat lining layer is provided with a clamping structure, and the clamping structure is located in the clamping grooves.

10. The large-caliber fluorine-lined butterfly valve according to claim 9, wherein: the chucking structure is trapezoidal chucking structure, and the draw-in groove that corresponds also is trapezoidal draw-in groove, the altitude range of chucking structure does: 1-5 mm.