CN219606055U

CN219606055U - Novel high-temperature hard sealing butterfly valve

Info

Publication number: CN219606055U
Application number: CN202320807262.3U
Authority: CN
Inventors: 吴玉梅; 李梅
Original assignee: SHITE VALVE CO Ltd
Current assignee: SHITE VALVE CO Ltd
Priority date: 2023-04-13
Filing date: 2023-04-13
Publication date: 2023-08-29
Anticipated expiration: 2033-04-13

Abstract

The utility model relates to a novel high-temperature hard sealing butterfly valve which is suitable for cutting off a high-temperature medium on a pipeline for supplying air to a blast furnace by a hot blast furnace of a metal metallurgy system. The valve comprises a valve body, a valve seat, sealing filler, a first shaft sleeve, a second shaft sleeve, a valve rod, a butterfly plate, a pin shaft, a pressing plate, a bolt fastener, a sealing ring, a seat and a driving device, wherein the sealing ring is fixed on the valve seat through the pressing plate and the bolt fastener in the valve body; an expansion gap is reserved between the outer side of the sealing ring and the inner side of the valve seat; when the valve is closed, the outer conical surface of the butterfly plate is attached to the inner conical surface of the sealing ring to form a conical surface sealing pair. According to the utility model, the sealing ring is fixed on the valve seat through the pressing plate and the bolt fastener, an expansion gap is reserved between the outer side surface of the sealing ring and the inner side surface of the valve seat so as to compensate the expansion amount of the butterfly plate and the sealing surface of the sealing ring, the sealing surface of the valve is protected, the service life of the valve is prolonged, the sealing performance is improved, and the flexible opening and closing of the valve, stable operation and no blocking phenomenon in long-term use are ensured.

Description

Novel high-temperature hard sealing butterfly valve

Technical Field

The utility model relates to a novel high-temperature hard sealing butterfly valve, in particular to a hard sealing butterfly valve which is suitable for cutting off high-temperature media on a pipeline for supplying air to a blast furnace by a hot blast stove of a metal metallurgy system.

Background

With the development of the domestic metallurgical industry to the scale and technological direction, the steel yield is continuously increased. The large-scale of the blast furnace and the enhancement of production technical means also put higher demands on the technical equipment of the blast furnace system. When the hot blast stove sends air, the valve of the combustion system must separate the gas pipeline combustion-supporting fan and the flue from the hot blast stove to ensure the safety of the equipment. The valve used in the hot blast stove system works in high temperature and high pressure air flow, and has strong hot blast oxidation capability, if there is gap leakage, the leakage gap will expand rapidly due to oxidation, so the valve used in the hot blast stove system should be sealed with special attention, and the valve is ensured to be opened and closed flexibly, run stably and have no blocking phenomenon after long-term use. The conventional triple eccentric hard seal butterfly valve cannot meet the above functions.

Disclosure of Invention

The utility model aims to provide a novel high-temperature hard sealing butterfly valve, which has stable working performance and is suitable for cutting off high-temperature media of a blast furnace hot air pipeline system.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

a novel high-temperature hard sealing butterfly valve comprises a valve body, a valve seat, sealing filler, a first shaft sleeve, a second shaft sleeve, a valve rod, a butterfly plate, a pin shaft, a pressing plate, a bolt fastener, a sealing ring, a seat and a driving device, wherein the sealing ring is fixed on the valve seat through the pressing plate and the bolt fastener in the valve body; an expansion gap is reserved between the outer side of the sealing ring and the inner side of the valve seat; when the valve is closed, the outer conical surface of the butterfly plate is attached to the inner conical surface of the sealing ring to form a conical surface sealing pair.

The improvement of the technical scheme is that: the butterfly plate is fixed on the valve rod through a pin shaft; the upper end of the valve rod penetrates through the upper support of the valve body, extends to the upper portion of the valve body and is connected with the driving device through the seat.

The improvement of the technical scheme is that: the surface of the sealing side of the butterfly plate is overlaid with hard alloy and processed into an inclined conical surface; the side surface of the valve seat is processed into an inclined conical surface, and a sufficient gap is reserved between the side surface of the valve seat and the surface of the sealing side of the butterfly plate; the pressing plate is fixed on the valve seat, and the inner side surface is processed into an inclined conical surface and has enough clearance with the sealing side surface of the butterfly plate.

The improvement of the technical scheme is that: the sealing ring is made of stainless steel.

The improvement of the technical scheme is that: and a copper sleeve is embedded in the second shaft sleeve, and an oil filling hole for filling lubricating oil is added.

The improvement of the technical scheme is that: and the interior of the valve body cylinder is lined with a heat insulation material.

By adopting the technical scheme, the utility model has the following technical effects:

according to the high-temperature hard sealing butterfly valve, the sealing ring is fixed on the valve seat through the pressing plate and the bolt fastener, and an expansion gap is reserved between the outer side surface of the sealing ring and the inner side surface of the valve seat so as to compensate the expansion amount of the sealing surfaces of the butterfly plate and the sealing ring, so that the sealing surface of the valve is protected.

When the butterfly valve is closed, the characteristic that the three eccentric sealing butterfly valve is more closed and tighter is utilized, so that the outer conical surface of the butterfly plate is attached to the inner conical surface of the sealing ring to form a conical surface sealing pair, and the sealing performance is improved.

The heat-insulating material is arranged in the valve body and is connected and sealed with the flange at the side of the pipeline, so that the heat-insulating effect can be effectively achieved, the temperature difference between the inside and the outside is reduced, and the tightness and the adaptability to the working condition of the valve are ensured.

The utility model solves the problem that the traditional hard sealing butterfly valve can not adjust the expansion amount of the sealing surface, effectively prolongs the service life of the valve, effectively improves the sealing performance, and ensures that the valve is flexible to open and close, stable to operate and free from blocking after long-term use.

Drawings

FIG. 1 is a schematic cross-sectional view of a high temperature hard seal butterfly valve of the utility model;

FIG. 2 is an enlarged schematic view of the portion A of FIG. 1;

wherein, 1, the valve body; 2. a valve stem; 3. a butterfly plate; 4. a pin shaft; 5. a first shaft sleeve; 6. sealing filler; 7. a second shaft sleeve; 8. a valve seat; 9. a bolt fastener; 10. a pressing plate; 11. a seal ring; 12. a connecting seat; 13. a driving device.

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.

The utility model relates to a novel high-temperature hard sealing butterfly valve, which is a hard sealing triple eccentric butterfly valve and is mainly applied to a pipeline for conveying a hot blast stove of a metallurgical system to a blast furnace and is in a high-temperature working environment.

As shown in fig. 1, the butterfly valve mainly comprises a valve body 1, a valve seat 9, a sealing filler 6, a first shaft sleeve 5, a second shaft sleeve 7, a valve rod 2, a butterfly plate 3, a pin shaft 4, a pressing plate 10, a bolt fastener 9, a sealing ring 11, a seat 12 and a driving device 13. The butterfly plate 3 is fixedly arranged on the valve rod 2 through a pin shaft 4; the upper end of the valve rod 2 passes through the upper support of the valve body 1, extends to the upper part outside the valve body 1, and is connected with the driving device 13 through the seat 12. The utility model mainly improves the sealing structure of the sealing ring, and is described below.

The sealing ring 11 is fixed on the valve seat 9 through the pressing plate 10 and the bolt fastening piece 9 in the valve body 1, wherein after the sealing ring 11 is installed on the sealing position of the valve seat 9, the pressing plate 10 is used for pressing and fixing, and the position, which is outside the pressing plate 10, is connected and fixed with the valve seat 9 through the bolt fastening piece 9. The valve seat 9 is provided with a mounting groove for a sealing ring 11.

The sealing ring 11 is of a circular ring structure, and an expansion gap is reserved between the outer side surface of the sealing ring 11 and the inner side of a mounting groove of the sealing ring on the side surface of the valve seat 9. When the butterfly valve is closed, the outer conical surface of the butterfly plate 3 is attached to the inner conical surface of the sealing ring 11 to form a conical surface sealing pair by utilizing the characteristic that the three-eccentric sealing butterfly valve is more closed and tighter.

In a specific implementation, hard alloy is deposited on the surface of the sealing side of the butterfly plate 3 and is processed into an inclined conical surface; meanwhile, the side surface of the valve seat 9 is processed into an inclined conical surface, and a sufficient gap is reserved between the side surface and the sealing side surface of the butterfly plate 3. The pressing plate 10 is fixed on the valve seat, and the inner side surface is processed into an inclined conical surface and has enough clearance with the sealing side surface of the butterfly plate.

The sealing ring 11 is made of stainless steel, the sealing ring 11 is fixed on the valve seat 9 through the pressing plate 10 and the bolt fastener 9, the inner side surface of the sealing ring 11 is processed into an inclined conical surface, a sealing pair can be formed between the inner side sealing surface and the sealing surface of the butterfly plate 3 after assembly, and an expansion gap is reserved between the outer side of the sealing ring 11 and the inner side of the valve seat 8.

As shown in fig. 1, a first sleeve 5 and a second sleeve 7 are sleeved below the valve rod 2, and in general, a copper sleeve is inlaid in the second sleeve 7, and an oil filling hole for filling lubricating oil is added, so that lubricating oil can be filled into the second sleeve to reduce friction resistance.

The heat-insulating material is arranged in the valve body 1 and is connected and sealed with the flange at the side of the pipeline, so that the heat-insulating effect can be effectively achieved, the temperature difference between the inside and the outside is reduced, and the tightness and the adaptability to the working condition of the valve are ensured. Specifically, the cylinder of the valve body 1 is lined with a heat insulating material.

According to the sealing butterfly valve, the sealing ring is fixed on the valve seat by the pressing plate and the bolt fastener, and meanwhile, an expansion gap is reserved between the outer side surface of the sealing ring and the inner side surface of the valve seat so as to compensate the expansion amount of the sealing surfaces of the butterfly plate and the sealing ring, so that the sealing surface of the valve is protected.

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. The utility model provides a novel high temperature hard seal butterfly valve, includes valve body (1), disk seat (8), sealing filler (6), axle sleeve one (5), axle sleeve two (7), valve rod (2), butterfly plate (3), round pin axle (4), clamp plate (10), bolt fastener (9), sealing washer (11), seat (12) and drive arrangement (13), its characterized in that: a sealing ring (11) is fixed on a valve seat (8) inside the valve body (1) through a pressing plate (10) and a bolt fastener (9); an expansion gap is reserved between the outer side of the sealing ring (11) and the inner side of the valve seat (8); when the valve is closed, the outer conical surface of the butterfly plate (3) is attached to the inner conical surface of the sealing ring (11) to form a conical surface sealing pair;

the surface of the sealing side of the butterfly plate (3) is overlaid with hard alloy and processed into an inclined conical surface; the side surface of the valve seat (8) is processed into an inclined conical surface, and a sufficient gap is reserved between the inclined conical surface and the surface of the sealing side of the butterfly plate; the pressing plate (10) is fixed on the valve seat, the inner side surface is processed into an inclined conical surface, and a sufficient gap is reserved between the inner side surface and the sealing side surface of the butterfly plate.

2. The novel high-temperature hard sealing butterfly valve according to claim 1, wherein: the butterfly plate (3) is fixed on the valve rod (2) through a pin shaft (4); the upper end of the valve rod (2) penetrates through the upper support of the valve body (1) to extend to the upper portion of the valve body (1) and is connected with the driving device (13) through the seat (12).

3. The novel high-temperature hard sealing butterfly valve according to claim 1, wherein: the sealing ring (11) is made of stainless steel.

4. The novel high-temperature hard sealing butterfly valve according to claim 1, wherein: and a copper sleeve is embedded in the second shaft sleeve (7) and an oil filling hole for filling lubricating oil is added.

5. The novel high-temperature hard sealing butterfly valve according to any one of claims 1 to 4, wherein: the inside of the cylinder of the valve body (1) is lined with a heat insulation material.