CN220600617U - Pneumatic butterfly valve - Google Patents

Abstract

The utility model discloses a pneumatic butterfly valve, which comprises a pneumatic actuator and a valve body, wherein the valve body comprises a valve rod, a valve plate, a shaft sleeve and a shell, the valve rod is fixedly connected with the valve plate, end covers are fixedly arranged at the left end and the right end of the pneumatic actuator, a cylindrical hollow area is arranged in the pneumatic actuator, a rotating column is rotatably arranged in the pneumatic actuator close to the upper position, the rotating column is fixedly connected with the valve rod, a gear is fixedly arranged outside the rotating column, racks are meshed and connected at the front side and the rear side of the gear, and a connecting block is fixedly arranged at one end of each rack. According to the utility model, by arranging the gears, the racks, the circular plates and the springs, when the pneumatic butterfly valve is in gas interruption or power interruption, the torque force between the rotating column and the valve rod is lost, the springs are reset and push the circular plates to move towards the inner side of the pneumatic actuator, the two racks move in opposite directions, the racks drive the gears to rotate, the gears drive the valve rod and the valve plate to rotate, the valve plate is reset, the flow of media is blocked, and the loss of the media is avoided.

Description

Pneumatic butterfly valve

Technical Field

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

Background

The pneumatic butterfly valve consists of a pneumatic actuator and a butterfly valve. The pneumatic butterfly valve is a pneumatic valve which uses a circular butterfly plate rotating along with a valve rod to perform opening and closing, is mainly used as a cut-off valve, can also be designed to have the functions of adjusting or cutting off the valve and adjusting, and is increasingly used on low-pressure large-medium caliber pipelines. Pneumatic butterfly valve classification: stainless steel pneumatic butterfly valve, hard seal pneumatic butterfly valve, soft seal pneumatic butterfly valve, carbon steel pneumatic butterfly valve. The pneumatic butterfly valve has the main advantages of simple structure, small volume, light weight and low manufacturing cost, is particularly remarkable in characteristics, is arranged in a high-altitude dark channel, is convenient to control and operate through a two-position five-way electromagnetic valve, and can also adjust flow media.

The existing pneumatic butterfly valve lacks a protection device, and in case of gas interruption and power failure during use, the valve plate can be always in an open state and can not be reset, so that loss of a conveying medium of the pneumatic butterfly valve is caused, and therefore, the pneumatic butterfly valve is provided.

Disclosure of Invention

The utility model aims to solve the defects in the prior art and provides a pneumatic butterfly valve.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a pneumatic butterfly valve, includes pneumatic actuator, valve body, the valve body includes valve rod, valve plate, axle sleeve, shell, valve rod and valve plate fixed connection, both ends all fixed mounting have the end cover about the pneumatic actuator, the inside cylindrical cavity region that is of pneumatic actuator, the inside rotation that is close to the top position of pneumatic actuator is installed and is rotated the post, rotate post and valve rod fixed connection, rotate post outside fixed mounting has the gear, both sides all meshing are connected with the rack around the gear, rack one end fixed mounting has the connecting block, the inside slidable mounting of pneumatic actuator has two symmetrical plectane, connecting block and plectane fixed connection, fixed mounting has a plurality of spring between plectane and the end cover, the inside fixed mounting of pneumatic actuator has the slide rail, slidable mounting has the slider on the slide rail, slider and rack fixed connection.

Further, the valve rod is rotatably arranged in the shaft sleeve, a sealing flange is fixedly arranged at the top end of the shaft sleeve, and the shaft sleeve is fixedly connected with the pneumatic actuator through the sealing flange.

Further, a plurality of first mounting grooves are formed in the outer portion of the valve rod, a first sealing ring is fixedly mounted in each first mounting groove, and the first sealing ring is attached to the inner wall of the shaft sleeve.

Further, the shell bottom fixed mounting has the connecting seat, the dwang is installed to the rotation in the connecting seat, dwang and valve plate fixed connection.

Further, the second mounting groove is formed in the outer portion of the rotating rod, a second sealing ring is fixedly mounted in the second mounting groove, and the second sealing ring is attached to the inner wall of the connecting seat.

The beneficial effects of the utility model are as follows:

1. according to the utility model, by arranging the gears, the racks, the circular plates and the springs, when the pneumatic butterfly valve is in gas interruption or power interruption, the torque force between the rotating column and the valve rod is lost, the springs are reset and push the circular plates to move towards the inner side of the pneumatic actuator, the two racks move in opposite directions, the racks drive the gears to rotate, the gears drive the valve rod and the valve plate to rotate, the valve plate is reset, the flow of media is blocked, and the loss of the media is avoided.

2. According to the utility model, the first sealing ring, the second sealing ring and the sealing flange are arranged, so that the first sealing ring on the valve rod can prevent media in the pipeline from penetrating into the pneumatic actuator, the second sealing ring on the rotating rod can prevent media in the pipeline from penetrating into the outside, and the shaft sleeve can be separated from the pneumatic actuator through the connection of the sealing flange, so that the internal parts can be conveniently maintained.

Drawings

FIG. 1 is a schematic diagram of a circular plate of a pneumatic butterfly valve according to the present utility model installed inside a pneumatic actuator;

FIG. 2 is a schematic diagram of the connection between a gear and a rack of a pneumatic butterfly valve according to the present utility model;

FIG. 3 is a schematic diagram of the overall structure of a pneumatic butterfly valve according to the present utility model;

FIG. 4 is a schematic front view of a pneumatic butterfly valve according to the present utility model;

fig. 5 is an explosion schematic diagram of a valve body of a pneumatic butterfly valve according to the present utility model.

In the figure: 1. a pneumatic actuator; 2. a valve body; 3. a valve stem; 4. a valve plate; 5. a shaft sleeve; 6. a housing; 7. an end cap; 8. rotating the column; 9. a gear; 10. a rack; 11. a connecting block; 12. a circular plate; 13. a spring; 14. a slide rail; 15. a slide block; 16. a sealing flange; 17. a first seal ring; 18. a connecting seat; 19. a rotating lever; 20. and a second sealing ring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1, 2 and 3, a pneumatic butterfly valve comprises a pneumatic actuator 1 and a valve body 2, wherein the valve body 2 comprises a valve rod 3, a valve plate 4, a shaft sleeve 5 and a shell 6, the valve rod 3 is fixedly connected with the valve plate 4, end covers 7 are fixedly arranged at the left end and the right end of the pneumatic actuator 1, a cylindrical hollow area is arranged inside the pneumatic actuator 1, a rotating column 8 is rotatably arranged at a position close to the upper position inside the pneumatic actuator 1, the rotating column 8 is fixedly connected with the valve rod 3, a gear 9 is fixedly arranged outside the rotating column 8, racks 10 are respectively meshed and connected at the front side and the rear side of the gear 9, a connecting block 11 is fixedly arranged at one end of the rack 10, two symmetrical circular plates 12 are slidably arranged inside the pneumatic actuator 1, the connecting block 11 is fixedly connected with the circular plates 12, a plurality of springs 13 are fixedly arranged between the circular plates 12 and the end covers 7, the inside of the pneumatic actuator 1 is fixedly provided with a sliding rail 14, the sliding rail 14 is provided with a sliding block 15 in a sliding manner, the sliding block 15 is fixedly connected with a rack 10, the pneumatic actuator 1 is externally connected with pneumatic equipment to compress air as a power source to drive a rotating column 8 to rotate, the rotating column 8 drives a gear 9 to rotate, the gear 9 drives racks 10 on two sides to move towards opposite directions, a connecting block 11 drives a circular plate 12 connected with each other to move towards the end part of the pneumatic actuator 1, a spring 13 compresses, the rotating column 8 drives a valve rod 3 and a valve plate 4 to rotate to achieve the purpose of opening a valve, when a pneumatic butterfly valve is in an air-break or power-off state, the rotating column 8 and the valve rod 3 lose torque force, the spring 13 resets and pushes the circular plate 12 to move towards the inside of the pneumatic actuator 1, the two racks 10 move towards each other, the rack 10 drives the gear 9 to rotate, the gear 9 drives the valve rod 3 and the valve plate 4 to rotate, the valve plate 4 is reset to block the flow of the medium, so that the loss of the medium is avoided.

Referring to fig. 4, the present utility model is specifically: the valve rod 3 is rotatably arranged in the shaft sleeve 5, the sealing flange 16 is fixedly arranged at the top end of the shaft sleeve 5, the shaft sleeve 5 is fixedly connected with the pneumatic actuator 1 through the sealing flange 16, and the shaft sleeve 5 can be separated from the pneumatic actuator 1, so that internal parts can be conveniently maintained.

Referring to fig. 5, the present utility model is specifically: the valve rod 3 is externally provided with a plurality of first mounting grooves, a first sealing ring 17 is fixedly mounted in each first mounting groove, the first sealing ring 17 is attached to the inner wall of the shaft sleeve 5, and the first sealing ring 17 prevents media in a pipeline from penetrating into the pneumatic actuator 1.

Referring to fig. 4 and 5, the present utility model is specifically: the bottom end of the shell 6 is fixedly provided with a connecting seat 18, the connecting seat 18 is rotatably provided with a rotating rod 19, and the rotating rod 19 is fixedly connected with the valve plate 4.

Referring to fig. 5, the present utility model is specifically: the second mounting groove is formed in the outer portion of the rotating rod 19, a second sealing ring 20 is fixedly mounted in the second mounting groove, the second sealing ring 20 is attached to the inner wall of the connecting seat 18, and the second sealing ring 20 prevents media in a pipeline from penetrating into the outer portion.

Working principle: through external pneumatic equipment compressed air as the power supply on pneumatic actuator 1, drive rotation post 8 and rotate, rotation post 8 drives gear 9 and rotates, gear 9 drives rack 10 of both sides and moves towards opposite direction, connecting block 11 drives the plectane 12 that connects respectively and moves to pneumatic actuator 1 tip, spring 13 compresses, rotation post 8 drives valve rod 3 and valve plate 4 and rotates and reach the valve purpose of opening, when pneumatic butterfly valve outage, rotation post 8 loses torque force with valve rod 3, spring 13 resets and top moves plectane 12 and moves to pneumatic actuator 1 inboard, two racks 10 do the opposite direction and move, rack 10 drives gear 9 and rotates, gear 9 drives valve rod 3 and valve plate 4 and rotate, valve plate 4 resets, stop the flow of medium, avoid the loss of medium, the medium infiltration in the pipeline is avoided to the pneumatic actuator 1 to the first sealing washer 17 on valve rod 3, the medium infiltration in the pipeline is avoided to the outside to the second sealing washer 20 on the dwang 19, through the connection of sealing flange 16, sleeve 5 can separate with pneumatic actuator 1, the convenience internal part.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

In the description of this patent, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the patent and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be configured and operated in a particular orientation, and are therefore not to be construed as limiting the patent.

Claims (5)

1. The utility model provides a pneumatic butterfly valve, its characterized in that includes pneumatic actuator (1), valve body (2) include valve rod (3), valve plate (4), axle sleeve (5), shell (6), valve rod (3) and valve plate (4) fixed connection, both ends all fixed mounting have end cover (7) about pneumatic actuator (1), pneumatic actuator (1) inside is cylindrical cavity region, pneumatic actuator (1) inside is close to upper position rotation and installs rotation post (8), rotation post (8) and valve rod (3) fixed connection, rotation post (8) outside fixed mounting has gear (9), both sides all meshing are connected with rack (10) around gear (9), rack (10) one end fixed mounting has connecting block (11), pneumatic actuator (1) inside slidable mounting has two symmetrical plectane (12), fixed mounting has a plurality of spring (13) between plectane (12) and end cover (7), inside actuator (1) outside fixed mounting has slide rail (15) on pneumatic actuator (14), the sliding block (15) is fixedly connected with the rack (10).

2. A pneumatic butterfly valve according to claim 1, characterized in that the valve rod (3) is rotatably mounted inside the shaft sleeve (5), a sealing flange (16) is fixedly mounted at the top end of the shaft sleeve (5), and the shaft sleeve (5) is fixedly connected with the pneumatic actuator (1) through the sealing flange (16).

3. The pneumatic butterfly valve according to claim 1, wherein a plurality of first mounting grooves are formed in the outer portion of the valve rod (3), a first sealing ring (17) is fixedly mounted in each first mounting groove, and the first sealing ring (17) is attached to the inner wall of the shaft sleeve (5).

4. A pneumatic butterfly valve according to claim 1, characterized in that a connecting seat (18) is fixedly mounted at the bottom end of the housing (6), a rotating rod (19) is rotatably mounted in the connecting seat (18), and the rotating rod (19) is fixedly connected with the valve plate (4).

5. The pneumatic butterfly valve of claim 4, wherein a second mounting groove is formed in the outer portion of the rotating rod (19), a second sealing ring (20) is fixedly mounted in the second mounting groove, and the second sealing ring (20) is attached to the inner wall of the connecting seat (18).