CN210859845U

CN210859845U - Pneumatic high-temperature hard seal butterfly valve seat structure

Info

Publication number: CN210859845U
Application number: CN201921426615.5U
Authority: CN
Inventors: 金成波; 魏万春; 于婷婷; 潘存龙
Original assignee: Tianjin Sianjia Flow Control Systems Co ltd
Current assignee: Tianjin Sianjia Flow Control Systems Co ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-06-26
Anticipated expiration: 2029-08-30

Abstract

The utility model discloses a pneumatic high temperature butterfly valve disk seat structure sealed firmly belongs to valve technical field, which comprises a valve body, the air inlet has been seted up on the valve body surface, the inside air duct that has pegged graft of valve body, movable disk seat is installed through No. two bellows to valve body bottom position, a bellows and No. two bellows are installed respectively to valve body inside, form the air cavity between a bellows and No. two bellows, the inside packing of valve body is packed. The utility model discloses owing to adopt the movable valve seat structure who takes the air cavity, after the valve is closed, ventilate and make the gas pressure increase of air cavity, promote the disk seat motion, with the disk seat inward extrusion of bellows coupling closely laminate with the sealing washer to guaranteed the sealing performance of valve, before the valve is opened, the pressure of air cavity is released, thereby makes disk seat and butterfly plate sealing washer light contact, because sealing pressure reduces between disk seat and the butterfly plate sealing washer, can realize the valve low friction and open and close the function fast.

Description

Pneumatic high-temperature hard seal butterfly valve seat structure

Technical Field

The utility model relates to the technical field of valves, especially, relate to a pneumatic high temperature butterfly valve disk seat structure sealed firmly.

Background

A valve is a device for controlling the direction, pressure, and flow rate of a fluid in a fluid system, and is a device capable of controlling the flow rate of a medium liquid, gas, or powder in a pipe or an apparatus by flowing or stopping the medium liquid, gas, or powder. The valve is a control part in a pipeline fluid conveying system, is used for changing the section of a passage and the flowing direction of a medium, and has the functions of diversion, cut-off, throttling, check, flow splitting, overflow pressure relief and the like. Valves used for fluid control range in variety and size from the simplest shut-off valves to the various valves used in extremely complex autonomous systems.

The existing hard seal butterfly valve seat is not provided with a pneumatic structure, the structure of a movable valve seat or an immovable valve seat is fixed, the structure is sealed through elastic deformation or torque increase, the valve seat and a sealing ring are easy to wear along with the increase of the switching times due to expansion during high temperature, so that the valve is leaked, the valve opening and closing speed of the structure is low, and the valve switching torque is large. Therefore, the pneumatic high-temperature hard sealing butterfly valve seat structure is provided.

Disclosure of Invention

The utility model provides a butterfly valve seating structure is sealed firmly to pneumatic high temperature aims at the hard butterfly valve seating structure that seals of pneumatic high temperature, uses bellows connection disk seat and valve body, and when the valve was closed, the displacement of disk seat had been realized through pneumatic action, made the sealed face of valve closely laminate, had guaranteed the sealing performance of valve, before the valve was opened, made the disk seat keep away from the butterfly plate through pneumatic disk seat, realized the low moment of torsion of valve and opened and close the function fast.

The utility model provides a specific technical scheme as follows:

the utility model provides a pair of pneumatic high temperature butterfly valve seating structure sealed firmly includes the valve body, the air inlet has been seted up on the valve body surface, the inside air duct that has pegged graft of valve body, movable disk seat is installed through No. two bellows to valve body bottom position, a bellows and No. two bellows are installed respectively to valve body inside, form the air cavity between a bellows and No. two bellows, the inside packing of valve body, valve body bottom fixedly connected with butterfly plate.

Optionally, the air inlet is connected to the top end of the ventilation pipeline in a conduction manner.

Optionally, a sealing ring is bonded to the outer surface of the butterfly plate.

The utility model has the advantages as follows:

the utility model discloses owing to adopt the movable valve seat structure who takes the air cavity, after the valve is closed, ventilate and make the gas pressure increase of air cavity, promote the disk seat motion, with the disk seat inward extrusion of bellows coupling closely laminate with the sealing washer to guaranteed the sealing performance of valve, before the valve is opened, the pressure of air cavity is released, thereby makes disk seat and butterfly plate sealing washer light contact, because sealing pressure reduces between disk seat and the butterfly plate sealing washer, can realize the valve low friction and open and close the function fast.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic overall structure diagram of a valve seat structure of a pneumatic high-temperature hard seal butterfly valve according to an embodiment of the present invention;

fig. 2 is the embodiment of the present invention, which is a schematic structural diagram of the bellows, the packing and the air cavity of the valve seat structure of the pneumatic high-temperature hard seal butterfly valve.

In the figure: 1. a valve body; 2. a butterfly plate; 3. a seal ring; 4. a movable valve seat; 5. a first corrugated pipe; 501. a second corrugated pipe; 6. a filler; 7. an air inlet; 8. an air duct; 9. an air cavity.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The following will describe a valve seat structure of a pneumatic high-temperature hard seal butterfly valve according to an embodiment of the present invention in detail with reference to fig. 1 to 2.

Referring to fig. 1 and 2, a valve seat structure of a pneumatic high-temperature hard seal butterfly valve provided by an embodiment of the present invention includes a valve body 1, an air inlet 7 is opened on a surface of the valve body 1, an air duct 8 is inserted into the valve body 1, a movable valve seat 4 is installed at a bottom end position of the valve body 1 through a second bellows 501, a first bellows 5 and a second bellows 501 are respectively installed inside the valve body 1, an air cavity 9 is formed between the first bellows 5 and the second bellows 501, a packing 6 is filled inside the valve body 1, a butterfly plate 2 is fixedly connected to a bottom end of the valve body 1, due to the adoption of the movable valve seat structure with the air cavity, when the valve is closed, air is introduced to increase gas pressure in the air cavity, the valve seat is pushed to move, the valve seat connected with the bellows is pressed inwards to be tightly attached to a seal ring, thereby ensuring sealing performance of, the pressure in the air cavity is released, so that the valve seat is slightly contacted with the butterfly plate sealing ring, and the low-friction quick opening and closing function of the valve can be realized due to the fact that the sealing pressure between the valve seat and the butterfly plate sealing ring is reduced.

Referring to fig. 1, the gas inlet 7 is connected to the top end of the ventilation duct 8 in a conducting manner, so as to facilitate the circulation of gas.

Referring to fig. 1, a sealing ring 3 is bonded on the outer surface of the butterfly plate 2, so that the sealing performance is improved.

The embodiment of the utility model provides a butterfly valve disk seat structure is sealed firmly to pneumatic high temperature, closes the back when the butterfly plate, and the sealing washer is laminated with movable disk seat, plays sealed effect, ventilates to the air cavity this moment, and the interior gas pressure of air cavity increases, promotes movable valve seat and locates the motion to the sealing washer, has increased the contact pressure of sealing washer with movable disk seat, makes the valve seal even. Before the valve is opened, the pressure in the air cavity is discharged through the air inlet, the contact pressure of the valve seat and the butterfly plate sealing ring is instantly reduced, the valve is opened simultaneously, the low-torque quick opening of the valve can be realized, and the valve seat is slightly contacted with the butterfly plate sealing ring and is elastically connected with the valve body through the corrugated pipe, so that the problem of valve blocking caused by high-temperature expansion of a high-temperature metal hard seal butterfly valve is solved.

It should be noted that, the utility model relates to a pneumatic high temperature butterfly valve seat structure sealed firmly, including valve body 1, butterfly plate 2, sealing washer 3, activity disk seat 4, bellows 5, No. two bellows 501, filler 6, air inlet 7, vent pipe 8, air cavity 9, the part is the general standard or the part that technical staff in the field knows, and its structure and principle all are that this technical staff all can learn through the technical manual or learn through conventional experimental method.

It is apparent that those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The utility model provides a pneumatic high temperature butterfly valve disk seat structure sealed firmly, includes the valve body, its characterized in that, the air inlet has been seted up on the valve body surface, the inside air duct that has pegged graft of valve body, movable disk seat is installed through No. two bellows in the valve body bottom position, No. one bellows and No. two bellows are installed respectively to the valve body inside, form the air cavity between No. one bellows and No. two bellows, the inside packing that fills of valve body, valve body bottom fixedly connected with butterfly plate.

2. The valve seat structure of a pneumatic high-temperature hard seal butterfly valve according to claim 1, wherein the air inlet is conductively connected to the top end of the vent pipe.

3. The valve seat structure of a pneumatic high-temperature hard seal butterfly valve according to claim 1, wherein a seal ring is bonded to an outer surface of the butterfly plate.