Flange type ventilation butterfly valve

Abstract

The utility model relates to the technical field of ventilation butterfly valves, and discloses a flange type ventilation butterfly valve which comprises a valve body, flange rings are fixedly installed on the two side edges of the valve body respectively, fixing rings are fixedly installed on the inner walls of the two flange rings respectively, and extrusion rings are installed on the outer walls, close to the flange rings, of the fixing rings in an attached mode. A fixing ring is arranged in the valve body, two spaced fixing blocks are fixedly installed on the inner walls of the upper side and the lower side of the fixing ring respectively, a fastening device is arranged on the two fixing blocks, and a butterfly valve assembly is arranged at the position, corresponding to the center, in the valve body. And at the moment, the flange ring and the flange on the pipeline are utilized to extrude the extrusion ring for fixation, and a good fixing effect can be achieved in the pipeline.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilation butterfly valves, in particular to a flange type ventilation butterfly valve. Background Art

[0002] Ventilation butterfly valves are used for ventilation in the chemical, building materials, power stations, glass and other industries, and in dusty cold or hot air gas pipelines in environmental protection projects. As a pipeline control device for regulating the flow or cutting off the gas medium, this type of valve should generally be installed horizontally in the pipeline, and the traditional flange ventilation butterfly valve is only sealed by squeezing rubber blocks or anti-overflow materials when the flange is connected during installation. This method only solves the external installation seal. However, when the flange ventilation butterfly valve is exposed to hot air or highly corrosive gas for a long time, it is easy to be affected by thermal expansion and contraction or corrosion effects that affect its internal sealing, which can easily lead to leakage. For this reason, we have proposed a flange ventilation butterfly valve. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies in the prior art, the utility model provides a flange type ventilation butterfly valve to solve the above-mentioned problems.

[0005] (II) Technical solution

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flange-type ventilation butterfly valve, comprising a valve body, flange rings are fixedly installed on both sides of the valve body, and fixing rings are fixedly installed on the inner walls of the two flange rings, an extrusion ring is fitted on the outer wall of the fixing ring close to the flange ring, and two spaced fixing blocks are fixedly installed on the inner walls of the upper and lower sides of the fixing ring, and fastening devices are arranged on the two fixing blocks, and a butterfly valve assembly is arranged at the corresponding center position inside the valve body.

[0007] Preferably, the extrusion ring is made of rubber material as a whole, and the extrusion ring is sleeved on the outer wall of the fixing ring, and the extrusion ring is fitted with a side adjacent to the flange ring.

[0008] Preferably, the fastening device includes a square plate, a contact plate, a hinged rod, and a pressure block, the hinged rod is fixedly mounted on an outer wall on one side adjacent to the two fixed blocks, and the square plate is rotatably mounted on the hinged rod, the contact plate is fixedly mounted on an outer wall on one side of the square plate close to the extrusion ring, and the pressure block is fixedly mounted on one end of the square plate facing away from the contact plate.

[0009] Preferably, the fixing ring is provided with a rectangular groove at a position corresponding to the contact plate in the fastening device, and the contact plate can move freely in the rectangular groove.

[0010] Preferably, the top outer wall of the pressing block is serrated, and the serrated portion of the pressing block is also made of rubber.

[0011] Preferably, the butterfly valve assembly includes a butterfly valve and a valve plate. The valve plate is fitted inside the valve body, and a rotating rod is fixedly mounted on the top outer wall of the valve plate. The rotating rod on the valve plate extends vertically out of the valve body and is fixedly connected to the butterfly valve.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the utility model provides a flange type ventilation butterfly valve, which has the following beneficial effects:

[0014] 1. When we need to install the flange type ventilation butterfly valve on the pipeline, we first need to weld the flange on the pipeline, then align the flange ring in the device horizontally with the flange on the pipeline, then align the fixing ring with the inside of the pipeline, and insert the fixing ring into the pipeline. When the pipeline fits the outer wall of the fixing ring, the pipeline will trigger the fastening device. When the pipeline contacts the outer wall of the fixing ring, the inner wall of the pipeline will squeeze the contact plate. When the contact plate is squeezed, the contact plate will move downward in the rectangular groove. When the contact plate moves downward, its other One end will also drive one end of the square plate to move downward. Since the square plate and the hinged rod are rotatably installed together, when the square plate is subjected to downward force at one end of the contact plate, the other end of the square plate will perform a circular motion and tilt upward. When the other end of the square plate tilts up, the pressure block will also tilt upward. At this time, the serrated outer wall of the pressure block will contact the inner wall of the pipe. When the contact plate completely enters the rectangular groove, the pressure block will fit tightly against the inner wall of the pipe. When the flange on the pipe fits with the extrusion ring, we fix it with bolts through the flange ring and the flange on the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the front structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the disassembled structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the fastening device of the utility model.

[0019] In the figure: 1. valve body; 2. butterfly valve; 3. flange ring; 4. fixing ring; 5. extrusion ring; 6. fixing block; 7. fastening device; 8. rectangular groove; 9. square plate; 10. contact plate; 11. hinge rod; 12. pressure block; 13. valve plate. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 A flange type ventilation butterfly valve comprises a valve body 1, flange rings 3 are fixedly mounted on both sides of the valve body 1, and fixing rings 4 are fixedly mounted on the inner walls of the two flange rings 3, an extrusion ring 5 is fitted on the outer wall of the fixing ring 4 close to the flange ring 3, and two spaced fixing blocks 6 are fixedly mounted on the inner walls of the upper and lower sides of the fixing ring 4, and fastening devices 7 are arranged on the two fixing blocks 6, and a butterfly valve assembly is arranged at the corresponding center position inside the valve body 1.

[0022] Furthermore, the extrusion ring 5 is made of rubber material as a whole, and is sleeved on the outer wall of the fixing ring 4 , and the extrusion ring 5 is in contact with a side adjacent to the flange ring 3 .

[0023] Furthermore, the fastening device 7 includes a square plate 9, a contact plate 10, a hinge rod 11, and a pressing block 12. The hinge rod 11 is fixedly mounted on the outer wall of one side adjacent to the two fixed blocks 6, and the square plate 9 is rotatably mounted on the hinge rod 11. The contact plate 10 is fixedly mounted on the outer wall of the side of the square plate 9 close to the extrusion ring 5, and the pressing block 12 is fixedly mounted on the end of the square plate 9 away from the contact plate 10. The working principle is: when the pipe contacts the outer wall of the fixed ring 4, the inner wall of the pipe will squeeze the contact plate 10. When the contact plate 10 is squeezed Afterwards, the contact plate 10 will move downward in the rectangular groove 8, and when the contact plate 10 moves downward, its other end will also drive one end of the square plate 9 to move downward. Since the square plate 9 is rotatably installed together with the hinge rod 11, when the square plate 9 is subjected to downward force toward one end of the contact plate 10, the other end of the square plate 9 will perform a circular motion and warp upward. When the other end of the square plate 9 is tilted, the pressure block 12 will also warp upward. At this time, the serrated outer wall of the pressure block 12 will contact the inner wall of the pipe.

[0024] Furthermore, a rectangular groove 8 is opened in the fixing ring 4 corresponding to the position of the contact plate 10 in the fastening device 7, and the contact plate 10 can move freely in the rectangular groove 8. Advantageously, when the contact plate 10 moves downward under the force, the rectangular groove 8 will not affect the next operation.

[0025] Furthermore, the top outer wall of the pressure block 12 is serrated, and the serrated part of the pressure block 12 is also made of rubber. Advantages: when the serrated end of the pressure block 12 made of rubber material comes into contact with an object, it will increase the friction due to its characteristics and will not damage the pipeline. It also has good corrosion resistance.

[0026] Furthermore, the butterfly valve assembly includes a butterfly valve 2 and a valve plate 13. The valve plate 13 is fitted inside the valve body 1, and a rotating rod is fixedly installed on the top outer wall of the valve plate 13. The rotating rod on the valve plate 13 extends vertically out of the valve body 1 and is fixedly connected to the butterfly valve 2.

[0027] Working principle: When we need to install the flange type ventilation butterfly valve on the pipeline, we first need to weld the flange on the pipeline, then we align the flange ring 3 in the device horizontally with the flange on the pipeline, then align the fixing ring 4 with the inside of the pipeline, and insert the fixing ring 4 into the pipeline. When the pipeline fits the outer wall of the fixing ring 4, the pipeline will trigger the fastening device 7. When the pipeline contacts the outer wall of the fixing ring 4, the inner wall of the pipeline will squeeze the contact plate 10. When the contact plate 10 is squeezed, the contact plate 10 will move downward in the rectangular groove 8. When the contact plate 10 moves downward, its other end will also drive one end of the square plate 9 to move downward. Since the square plate 9 is rotatably installed with the hinged rod 11, when the square plate 9 is subjected to downward force toward one end of the contact plate 10 The other end of the square plate 9 will perform a circular motion and tilt upward. When the other end of the square plate 9 tilts up, the pressure block 12 will also tilt upward. At this time, the serrated outer wall of the pressure block 12 will contact the inner wall of the pipe. When the contact plate 10 completely enters the rectangular groove 8, the pressure block 12 will fit tightly against the inner wall of the pipe. When the flange on the pipe fits with the extrusion ring 5, we use the flange ring 3 and the flange on the pipe to fix them with bolts. The utility model adopts the linkage relationship between the contact plate 10 and the pressure block 12 in the fastening device 7. When the pipe gets closer and closer to the extrusion ring 5, the pressure block 12 will be squeezed tighter. At this time, we use the flange ring 3 and the flange on the pipe to squeeze the extrusion ring 5 for fixing, which can also play a good fixing role inside.

[0028] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flange type ventilation butterfly valve, comprising a valve body (1), characterized in that: Flange rings (3) are fixedly mounted on both sides of the valve body (1), and fixing rings (4) are fixedly mounted on the inner walls of the two flange rings (3), and an extrusion ring (5) is fitted on the outer wall of the fixing ring (4) close to the flange ring (3), and two fixed blocks (6) are fixedly mounted at intervals on the upper and lower inner walls of the fixing ring (4), and fastening devices (7) are arranged on the two fixing blocks (6), and a butterfly valve assembly is arranged at a corresponding central position inside the valve body (1).

2. A flange type ventilation butterfly valve according to claim 1, characterized in that: The extrusion ring (5) is made of rubber material as a whole, and is sleeved on the outer wall of the fixing ring (4), and the extrusion ring (5) is in contact with the side adjacent to the flange ring (3).

3. A flange type ventilation butterfly valve according to claim 2, characterized in that: The fastening device (7) comprises a square plate (9), a contact plate (10), a hinge rod (11), and a pressure block (12); the hinge rod (11) is fixedly mounted on an outer wall adjacent to two fixed blocks (6), and the square plate (9) is rotatably mounted on the hinge rod (11); the contact plate (10) is fixedly mounted on an outer wall of a side of the square plate (9) close to the extrusion ring (5), and the pressure block (12) is fixedly mounted on one end of the square plate (9) facing away from the contact plate (10).

4. A flange type ventilation butterfly valve according to claim 1, characterized in that: The fixing ring (4) is provided with a rectangular groove (8) at a position corresponding to the contact plate (10) in the fastening device (7), and the contact plate (10) can move freely in the rectangular groove (8).

5. The flange type ventilation butterfly valve according to claim 3, characterized in that: The top outer wall of the pressing block (12) is serrated, and the serrated portion of the pressing block (12) is also made of rubber.

6. A flange type ventilation butterfly valve according to claim 1, characterized in that: The butterfly valve assembly comprises a butterfly valve (2) and a valve plate (13); the valve plate (13) is fitted inside a valve body (1), and a rotating rod is fixedly mounted on the top outer wall of the valve plate (13); the rotating rod on the valve plate (13) vertically extends out of the valve body (1) and is fixedly connected to the butterfly valve (2).

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