Connecting rod type sealing butterfly valve

Abstract

The utility model relates to the field of valves, and particularly discloses a connecting rod type sealing butterfly valve which comprises a valve body, a sealing ring is arranged in the valve body, a valve shaft is rotationally connected to the position, located on one side of the sealing ring, in the valve body, a first connecting rod is installed on the valve shaft, one end of the first connecting rod is connected with a valve plate, and a second connecting rod is connected to the position, located on the other side of the sealing ring, in the valve body. The second connecting rod is connected with the other side of the valve plate, the peripheral side of the valve plate makes contact with the sealing ring, and a plurality of movable cover plates are installed on the valve plate to protect the peripheral side of the valve plate. Single rotary opening and closing motion of a common butterfly valve is converted into space motion combining translation and optional installation motion, the valve plate and the valve shaft are independently designed, and closed-loop sealing is achieved through the valve plate and the sealing face through hinge joint of the connecting rod. By designing the cover plate, when the valve plate is closed, the peripheral side of the valve plate is in contact with the sealing ring to keep sealing, and when the valve plate is opened, the peripheral side of the valve plate is protected through the cover plate, so that the situation that the sealing performance is weakened during later sealing due to smoke corrosion is avoided.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to a connecting rod type sealing butterfly valve. Background Art

[0002] A flue gas sealing valve is a valve used to control flue gas flow, primarily to prevent backflow and leakage. However, currently, most flue gas sealing valves are centerline or eccentric butterfly valves. Centerline butterfly valves, due to the influence of the drive shaft, have difficulty forming a stable, integrated sealing surface in the internal shaft outlet area. In actual use, this results in a loose seal and gradually increases leakage. Therefore, those skilled in the art have developed a connecting rod sealing butterfly valve to address the issues raised in the background art. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a connecting rod type sealing butterfly valve, including a valve body, a sealing ring is provided inside the valve body, a valve shaft is rotatably connected to one side of the sealing ring inside the valve body, a connecting rod 1 is installed on the valve shaft, one end of the connecting rod 1 is connected to the valve plate, a connecting rod 2 is connected to the other side of the sealing ring inside the valve body, the connecting rod 2 is connected to the other side of the valve plate, the peripheral side of the valve plate is in contact with the sealing ring, and a plurality of movable cover plates are installed on the valve plate to protect the peripheral side of the valve plate.

[0004] Preferably: the valve plate is rotatably connected to a rotating gear ring, and a plurality of gears are rotatably connected to the circumferential side of the rotating gear ring. Tooth grooves are provided on the inner and outer sides of the rotating gear ring, and the outer side of the rotating gear ring is engaged with the gear. A connecting plate is fixedly connected to one side of the gear, and a cover plate is fixedly connected to one end of the connecting plate, and adjacent connecting plates and cover plates are staggered with each other.

[0005] Preferably: the valve plate is rotatably connected to a rotating disk inside the rotating gear ring, and a convex tooth is provided on the outside of the rotating disk to engage with the inside of the rotating gear ring. A sliding rod is slidably connected to one side of the rotating disk on the valve plate, and one end of the sliding rod is rotatably connected to a pull rod, and one end of the pull rod is rotatably connected to the upper end of the rotating disk. A connecting frame is provided at the other end of the sliding rod, and a rotating rod is fixedly connected between the two ends of the connecting rod. A swing rod is fixedly connected to the rotating rod, and one end of the swing rod is inserted into the connecting frame.

[0006] Preferably, a plurality of reinforcing ribs are installed on the upper circumference of the valve body.

[0007] Preferably, a plurality of through holes are installed on both sides of the valve body, and are connected to pipelines through the through holes.

[0008] Preferably, both ends of the valve shaft pass through the valve body, and a sealing structure is provided between the both ends of the valve shaft and the valve body.

[0009] Preferably, graphite packing is installed on the sealing ring.

[0010] The technical effects and advantages of this utility model are:

[0011] 1. This utility model utilizes the more flexible spatial motion trajectory relationship of the spatial rod to transform the single rotation opening and closing motion of the ordinary butterfly valve into a spatial motion that combines translation and optional motion. The valve plate and valve shaft are designed independently, and the valve plate and sealing surface are hinged through the connecting rod to achieve closed-loop sealing.

[0012] 2. The utility model is designed with a cover plate. When the valve plate is closed, the periphery of the valve plate contacts the sealing ring to maintain a seal. When the valve plate is opened, the periphery of the valve plate is protected by the cover plate to avoid being corroded by flue gas, which may lead to a weakening of the sealing performance during the later sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram provided by this application;

[0014] Figure 2 This is a schematic diagram of the structure of the valve plate provided by the present application when it is open;

[0015] Figure 3 This is a schematic diagram of the structure of the valve plate provided in this application when it is closed;

[0016] Figure 4 This is a schematic diagram of the structure of the valve plate provided by the present application when it is open;

[0017] In the picture:

[0018] 1. Valve body; 2. Sealing ring; 3. Valve plate; 31. Rotating gear ring; 32. Gear; 33. Connecting plate; 34. Cover plate; 35. Rotating disk; 36. Sliding rod; 37. Pull rod; 4. Valve shaft; 41. Connecting rod 1; 42. Rotating rod; 5. Connecting rod 2. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figures 1 to 4 In this embodiment, a connecting rod type sealing butterfly valve is provided, including a valve body 1, a sealing ring 2 is provided inside the valve body 1, a valve shaft 4 is rotatably connected to one side of the sealing ring 2 inside the valve body 1, a connecting rod 1 41 is installed on the valve shaft 4, one end of the connecting rod 1 41 is connected to a valve plate 3, a connecting rod 2 5 is connected to the other side of the sealing ring 2 inside the valve body 1, the connecting rod 2 5 is connected to the other side of the valve plate 3, the peripheral side of the valve plate 3 is in contact with the sealing ring 2, and a plurality of movable cover plates 34 are installed on the valve plate 3 to protect the peripheral side of the valve plate 3.

[0021] When in use, the sealing ring 2 contacts the circumference of the valve plate 3, thereby cutting off the interior of the valve body 1 for sealing. The interior of the valve body is blocked by the device, and the flexible spatial motion trajectory relationship between the connecting rod 1 41 and the connecting rod 2 5 is utilized to transform the single rotation opening and closing motion of the ordinary butterfly valve into a spatial motion combining translation and optional motion. The valve plate 3 and the valve shaft 4 are designed independently, and the valve plate 3 and the sealing ring 2 realize closed-loop sealing through the connecting rod hinge.

[0022] In further embodiments, see Figures 3-4 The valve plate 3 is rotatably connected to a rotating gear ring 31, and a plurality of gears 32 are rotatably connected to the circumference of the rotating gear ring 31. Tooth grooves are provided on the inner and outer sides of the rotating gear ring 31. The outer side of the rotating gear ring 31 is engaged with the gear 32. A connecting plate 33 is fixedly connected to one side of the gear 32, and a cover plate 34 is fixedly connected to one end of the connecting plate 33. Adjacent connecting plates 33 and cover plates 34 are staggered with each other.

[0023] By rotating the gear ring 31, multiple gears 32 on the peripheral side are driven to rotate simultaneously. When the gear 32 rotates, the connecting plate 33 is driven to rotate together. The connecting plate 33 thereby drives the cover plate 34 to rotate. The cover plate 34 rotates and moves to the side of the valve plate 3 to cover the side of the valve plate 3, thereby preventing the smoke from impacting and overlooking the valve plate when the smoke is flowing through the valve, which may cause the valve plate 3 to be not tight enough when blocking, thereby reducing the sealing of the valve.

[0024] In further embodiments, see Figures 3-4 The valve plate 3 is rotatably connected to a rotating disk 35 inside the rotating gear ring 31. A convex tooth is provided on the outside of the rotating disk 35 and meshes with the inside of the rotating gear ring 31. A sliding rod 36 is slidably connected to one side of the rotating disk 35 on the valve plate 3. One end of the sliding rod 36 is rotatably connected to a pull rod 37. One end of the pull rod 37 is rotatably connected to the upper end of the rotating disk 35. A connecting frame is provided at the other end of the sliding rod 36. A rotating rod 42 is fixedly connected between one end of the connecting rod 41, and a swing rod is fixedly connected to the rotating rod 42. One end of the swing rod is inserted into the connecting frame.

[0025] When the valve plate 3 is opened, the connecting rod 41 is driven to rotate by the valve shaft 4. When the connecting rod 41 rotates, the distance between the valve plate 3 and the connecting rod 41 increases, and one end of the connecting rod 41 rotates relative to the valve plate 3. When one end of the connecting rod 41 rotates, it drives the rotating rod 42 to rotate, and when the rotating rod 42 rotates, it drives the swing rod to rotate together. The swing rod thereby pulls the sliding rod 36 to move through the connecting frame, and the sliding rod 36 thereby pulls the rotating disk 35 to rotate through the pull rod 37, and drives the rotating gear ring 31 to rotate through the rotating disk 35. The rotating gear ring 31 drives multiple gears 32 on the outside to rotate at the same time, so that the multiple cover plates 34 rotate to the side together, and the multiple cover plates cover the side of the valve plate 3 as a whole for protection.

[0026] In further embodiments, see Figures 1-2 A plurality of reinforcing ribs are installed on the upper side of the valve body 1. The plurality of reinforcing ribs increase the strength of the valve body as a whole.

[0027] In further embodiments, see Figures 1-2 The valve body 1 is provided with a plurality of through holes on both sides, and is connected to the pipeline through the through holes.

[0028] In further embodiments, see Figures 1-2 The two ends of the valve shaft 4 pass through the valve body 1, and a sealing structure is provided between the two ends of the valve shaft 4 and the valve body 1. The sealing structure increases the sealing between the valve shaft 4 and the valve body 1 to prevent gas from flowing out from the gap between the valve shaft 4 and the valve body 1.

[0029] In further embodiments, see Figures 1-2 Graphite packing is installed on the sealing ring 2. The sealing performance between the sealing ring 2 and the valve plate 3 is increased by the graphite packing.

[0030] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A connecting rod type sealing butterfly valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with a sealing ring (2) inside the valve body (1), and a valve shaft (4) is rotatably connected to one side of the sealing ring (2) inside the valve body (1), and a connecting rod (41) is installed on the valve shaft (4), and one end of the connecting rod (41) is connected to the valve plate (3), and a connecting rod (5) is connected to the other side of the sealing ring (2) inside the valve body (1), and the connecting rod (5) is connected to the other side of the valve plate (3), and the peripheral side of the valve plate (3) is in contact with the sealing ring (2), and a plurality of movable cover plates (34) are installed on the valve plate (3) to protect the peripheral side of the valve plate (3).

2. A connecting rod type sealing butterfly valve according to claim 1, characterized in that: The valve plate (3) is rotatably connected to a rotating gear ring (31), and a plurality of gears (32) are rotatably connected to the circumference of the rotating gear ring (31). Tooth grooves are provided on the inner and outer sides of the rotating gear ring (31), and the outer side of the rotating gear ring (31) is engaged with the gear (32). A connecting plate (33) is fixedly connected to one side of the gear (32), and a cover plate (34) is fixedly connected to one end of the connecting plate (33), and adjacent connecting plates (33) and cover plates (34) are staggered with each other.

3. A connecting rod type sealing butterfly valve according to claim 2, characterized in that: The valve plate (3) is rotatably connected to a rotating disk (35) located inside the rotating gear ring (31). The outer side of the rotating disk (35) is provided with a convex tooth that meshes with the inner part of the rotating gear ring (31). The valve plate (3) is slidably connected to a sliding rod (36) located on one side of the rotating disk (35). One end of the sliding rod (36) is rotatably connected to a pull rod (37). One end of the pull rod (37) is rotatably connected to the upper end of the rotating disk (35). The other end of the sliding rod (36) is provided with a connecting frame. A rotating rod (42) is fixedly connected between one end of the connecting rod (41). A swing rod is fixedly connected to the rotating rod (42). One end of the swing rod is inserted into the interior of the connecting frame.

4. A connecting rod type sealing butterfly valve according to claim 1, characterized in that: A plurality of reinforcing ribs are installed on the upper side of the valve body (1).

5. The connecting rod type sealing butterfly valve according to claim 1, characterized in that: A plurality of through holes are installed on both sides of the valve body (1), and are connected to pipelines through the through holes.

6. The connecting rod type sealing butterfly valve according to claim 1, characterized in that: Both ends of the valve shaft (4) pass through the valve body (1), and a sealing structure is provided between the two ends of the valve shaft (4) and the valve body (1).

7. The connecting rod type sealing butterfly valve according to claim 1, characterized in that: Graphite packing is installed on the sealing ring (2).

Images