A new double-flange butterfly valve

Abstract

The utility model discloses a novel double flange butterfly valve, including butterfly valve main part, the both sides symmetry of butterfly valve main part are installed flange plate, the even establishment of a plurality of arc grooves has on the flange plate, the one side of flange plate is installed tooth ring, the one side of flange plate is equipped with a plurality of fixed plate, and the novel double flange butterfly valve sets up arc groove on flange plate, and the compensation ability of circumferential deviation when retaining to pipeline installation. Meanwhile, through the meshing cooperation of tooth ring and fixed plate tooth, the rigid connection of fixed plate and pipeline, flange plate, formed reliable anti -rotation restraint structure. When butterfly valve produces rotation tendency, the occlusion of tooth and tooth ring can transmit the torque to fixed plate, and the rigid connection of fixed bolt and pipeline of fixed plate can effectively block the circumferential displacement, avoid butterfly valve main body along the central axis rotation inclination, significantly reduce the abrasion of valve plate and valve body, reduce medium leakage probability, prolong the service life of equipment.

Description

Technical Field

[0001] This utility model relates to the field of double-flanged butterfly valve technology, specifically a novel double-flanged butterfly valve. Background Technology

[0002] In industrial piping systems, double-flanged butterfly valves are key components for fluid control, and their installation accuracy and stability directly affect system operating efficiency. Traditional double-flanged butterfly valves often use a circular fixing hole design for their flanges. When there are installation errors in the pipes to be connected on both sides, it is very easy to encounter difficulties in aligning the flange holes, leading to low installation efficiency or even failure to assemble properly.

[0003] To address this issue, some improved butterfly valve flanges use arc grooves instead of circular holes. The angle compensation capability of the arc grooves adapts to the circumferential offset of the pipeline, enabling rapid alignment.

[0004] However, this type of structure has revealed obvious defects in long-term use: affected by factors such as medium pressure fluctuations, pipeline vibration or loose bolts, the butterfly valve body is prone to rotation and tilting along the central axis, which aggravates the wear of the valve plate and valve body, causes the risk of medium leakage, shortens the service life of the equipment, and in severe cases even affects the safe operation of the entire pipeline system.

[0005] Therefore, how to improve the anti-rotation stability of double-flange butterfly valves while retaining the advantages of arc groove angle compensation has become a technical problem that urgently needs to be solved in the industry.

[0006] Therefore, a novel double-flanged butterfly valve is proposed. Summary of the Invention

[0007] The purpose of this utility model is to provide a novel double-flanged butterfly valve to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a novel double-flange butterfly valve, comprising a butterfly valve body, flanges symmetrically mounted on both sides of the butterfly valve body, a plurality of arc-shaped grooves evenly formed on the flanges, a toothed ring mounted on the side of the flanges near the butterfly valve body, a plurality of fixing plates provided on one side of the flanges, a plurality of through holes formed on each of the fixing plates, and teeth evenly formed on the fixing plates, the teeth being adapted to the toothed rings.

[0009] Preferably, a pipe to be connected is provided on the side of the flange away from the butterfly valve body, and fixing bolts are installed between the pipe, the flange and the fixing plate.

[0010] Preferably, the fixing plate and the flange are concentric arc-shaped structures, and the teeth are uniformly integrally formed on the side of the fixing plate facing the toothed ring.

[0011] Preferably, a controller is fixedly installed on the top of the butterfly valve body via a bracket. The controller can be an electric, pneumatic, or manual adjustment structure, and the output end of the controller is connected to the valve plate inside the butterfly valve body via a drive shaft.

[0012] Preferably, the number of through holes is 2 to 4, and the diameter of the through holes is adapted to the width of the arc groove.

[0013] Preferably, the flange has an annular sealing groove on the end face where it fits with the pipe, and a sealing gasket is embedded in the sealing groove, the thickness of which is 2-5 mm.

[0014] Compared with existing technologies, the beneficial effects of this utility model are as follows: This novel double-flanged butterfly valve retains the ability to compensate for circumferential deviations during pipeline installation by setting an arc groove on the flange. Simultaneously, the meshing of the toothed ring and the teeth on the fixed plate, combined with the rigid connection between the fixed plate and the pipeline and flange, forms a reliable anti-rotation constraint structure. When the butterfly valve tends to rotate, the meshing of the teeth and the toothed ring transmits torque to the fixed plate. The rigid connection between the fixed plate and the pipeline via fixing bolts effectively blocks circumferential displacement, preventing the butterfly valve body from rotating and tilting along the central axis, significantly reducing wear on the valve plate and valve body, lowering the probability of media leakage, and extending the service life of the equipment. Attached Figure Description

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

[0016] Figure 2 This is a schematic diagram of the structure of this utility model when it is not installed;

[0017] Figure 3 This is an exploded view of the structure of this utility model;

[0018] Figure 4 This is a cross-sectional structural diagram of the present invention.

[0019] In the diagram: 1. Butterfly valve body; 2. Controller; 3. Pipeline; 4. Flange; 5. Fixing bolt; 6. Arc groove; 7. Gear ring; 8. Fixing plate; 9. Through hole; 10. Tooth. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0021] Please see Figure 1-4This utility model provides a technical solution: a novel double-flange butterfly valve, comprising a butterfly valve body 1, on both sides of the butterfly valve body 1 symmetrically mounted with circular flanges 4 by welding or integral molding, the edge of the flanges 4 uniformly having 3 to 8 arc-shaped grooves 6 along the circumferential direction, the side of the flanges 4 near the butterfly valve body 1 having an annular toothed ring 7 by welding or integral molding, the side of the flanges 4 having 3 to 8 fixing plates 8 uniformly distributed along the circumferential direction, the number of fixing plates 8 corresponding one-to-one with the number of arc-shaped grooves 6, each fixing plate 8 having multiple through holes 9, the number of through holes 9 being 2 to 4, the diameter of the through holes 9 being adapted to the width of the arc-shaped grooves 6, the fixing plates 8 uniformly having teeth 10, the teeth 10 being adapted to the toothed ring 7.

[0022] like Figure 1 and Figure 3 As shown: On the other side of the flange 4 away from the butterfly valve body 1, there is a pipe 3 to be connected. The port of the pipe 3 fits with the end face of the flange 4. The fixing bolts 5 pass through the flange hole of the pipe 3, the arc groove 6 of the flange 4 and the through hole 9 of the fixing plate 8 in sequence, and are tightened by nuts to form a rigid connection between the pipe 3, the flange 4 and the fixing plate 8.

[0023] like Figure 2 and Figure 4 As shown: The fixing plate 8 and the flange 4 are concentric arc-shaped structures. The teeth 10 are uniformly and integrally formed on the inner arc surface of the arc-shaped fixing plate 8 by casting or stamping. The teeth 10 are engaged with the toothed ring 7, which can restrict the position of the fixing plate 8 and prevent the fixing plate 8 from shifting.

[0024] like Figure 1 and Figure 2 As shown: A controller 2 is fixedly installed on the top of the butterfly valve body 1 by a bracket. The controller 2 can be electric, pneumatic or manual adjustment structure. The output end of the controller 2 is connected to the valve plate inside the butterfly valve body 1 through a transmission shaft. The rotation angle of the valve plate can be precisely adjusted by the controller 2 to control the flow rate of the pipeline medium. The controller 2 has an opening degree indication scale on its surface for easy and intuitive observation of the valve plate status.

[0025] like Figure 1 and Figure 2 As shown: The end face where the flange 4 and the pipe 3 fit together is provided with an annular sealing groove. A sealing gasket is embedded in the sealing groove. The thickness of the sealing gasket is 2 to 5 mm. After the fixing bolts 5 are tightened, it can fill the gap between the flange 4 and the pipe 3, improve the overall sealing performance, and prevent media leakage.

[0026] Working principle: First, place the butterfly valve body 1 between the two pipes 3 to be connected, so that the end face of the flange 4 fits against the port of the pipe 3. At this time, the evenly distributed arc-shaped grooves 6 on the flange 4 can form a preliminary alignment with the flange hole of the pipe 3. The arc design of the arc-shaped grooves 6 provides compensation space for the relative angular deviation between the pipe 3 and the flange 4. Even if the flange hole of the pipe 3 is circumferentially offset due to installation error, the arc-shaped grooves 6 can still form an effective passage with the flange hole of the pipe 3.

[0027] Subsequently, the fixing plate 8 is engaged with the toothed ring 7 on the flange 4 via its inner teeth 10. The fixing plate 8 adopts an arc-shaped structure concentric with the flange 4, and its inner teeth 10 precisely match the grooves of the toothed ring 7. The position of the fixing plate 8 can be finely adjusted along the circumference of the flange 4 by using the teeth 10 and the toothed ring 7 until the through hole 9 on the fixing plate 8 is completely coaxial with the arc groove 6 and the flange hole of the pipe 3. Finally, the fixing bolts 5 are passed through the flange hole of the pipe 3, the arc groove 6 of the flange 4, and the through hole 9 of the fixing plate 8 in sequence. After tightening the nuts, the pipe 3, the flange 4, and the fixing plate 8 form a rigid whole, completing the installation and fixing.

[0028] When the butterfly valve body 1 tilts along its central axis due to long-term vibration, loosening of the fixing bolts 5, or impact of medium pressure, the flanges 4 symmetrically installed on both sides will synchronously drive the inner annular toothed ring 7 to undergo circumferential displacement. At this time, the teeth 10 on the inner arc surface of the fixing plate 8 mesh with the tooth groove of the toothed ring 7, transmitting the rotational torque of the butterfly valve body 1 to the fixing plate 8.

[0029] Then, since the fixing plate 8 adopts an arc-shaped structure with the same center as the flange 4 and is evenly distributed along the circumference, each fixing plate 8 is rigidly connected to the fixing bolt 5 through the through hole 9. When the fixing plate 8 is driven by the toothed ring 7 and attempts to rotate, the fixing bolt 5 will cooperate with the flange hole on the pipe 3. Since the pipe 3 is a fixed pipeline system, the head of the fixing bolt 5 is limited by the flange hole of the pipe 3 and cannot rotate with the fixing plate 8. Then, the bolt forms a rigid pull on the fixing plate 8, blocking its circumferential displacement, which in turn limits the occurrence of the flange 4 and the butterfly valve body 1 rotating and tilting along the central axis.

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

Claims

1. A novel double-flanged butterfly valve, comprising a butterfly valve body (1), characterized in that: Flanges (4) are symmetrically installed on both sides of the butterfly valve body (1). Multiple arc-shaped grooves (6) are evenly opened on the flanges (4). A toothed ring (7) is installed on the side of the flanges (4) close to the butterfly valve body (1). Multiple fixing plates (8) are provided on one side of the flanges (4). Multiple through holes (9) are opened on the fixing plates (8). Teeth (10) are evenly provided on the fixing plates (8). The teeth (10) are adapted to the toothed rings (7).

2. The novel double-flanged butterfly valve according to claim 1, characterized in that: The flange (4) is provided with a pipe (3) to be connected on the other side away from the butterfly valve body (1), and a fixing bolt (5) is installed between the pipe (3), the flange (4) and the fixing plate (8).

3. The novel double-flanged butterfly valve according to claim 1, characterized in that: The fixing plate (8) and the flange (4) are concentric arc structures, and the teeth (10) are uniformly integrally formed on the side of the fixing plate (8) facing the toothed ring (7).

4. A novel double-flanged butterfly valve according to claim 1, characterized in that: A controller (2) is fixedly installed on the top of the butterfly valve body (1) by a bracket. The controller (2) can be an electric, pneumatic or manual adjustment structure. The output end of the controller (2) is connected to the valve plate inside the butterfly valve body (1) through a transmission shaft.

5. A novel double-flanged butterfly valve according to claim 1, characterized in that: The number of through holes (9) is 2 to 4, and the diameter of the through holes (9) is adapted to the width of the arc groove (6).

6. A novel double-flanged butterfly valve according to claim 1, characterized in that: The flange (4) and the pipe (3) have an annular sealing groove on their end face where they fit together. A sealing gasket is embedded in the sealing groove and the thickness of the sealing gasket is 2 to 5 mm.

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