Bidirectional sealing flange type triple offset butterfly valve

Abstract

The utility model relates to butterfly valve technical field discloses a kind of bidirectional sealing flange type three eccentric butterfly valves, including valve body, valve seat, valve clapper assembly and valve rod operating mechanism;The valve body is provided with valve body fixed hole;The valve clapper assembly includes eccentric valve clapper installed in valve body by valve shaft;The valve rod operating mechanism includes the rotating handle connected with valve shaft, movable pressing handle and the movable tooth set on movable pressing handle, the valve seat is provided with the toothed disc with tooth mouth, the movable tooth is engaged with the tooth mouth on tooth disc. By adopting the eccentric valve clapper of three eccentric structure and the cooperation of valve seat, metal hard sealing or composite sealing can be realized when closing, effectively avoid the sealing failure problem caused by one-way pressure of traditional butterfly valve. The structure makes the butterfly valve under bidirectional fluid pressure can keep good sealing performance, especially suitable for harsh working conditions of high pressure, high temperature or corrosive medium, significantly improve the reliability and service life of valve.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, specifically a bidirectional sealing flange type triple eccentric butterfly valve. Background Technology

[0002] Butterfly valves, as a common fluid control device, are widely used in industries such as petroleum, chemical, power, pharmaceutical, food, and environmental protection. They play a crucial role, especially in the opening, closing, regulation, and flow control of fluids in pipelines. Butterfly valves are simple in structure, small in size, and lightweight, and can be widely used in large-diameter pipelines, making them an ideal fluid control device.

[0003] While existing butterfly valves have relatively simple opening and closing mechanisms, they still suffer from inconvenient operation and poor sealing. Especially in high-pressure, high-temperature, or corrosive media environments, butterfly valves require significant torque for opening and closing. This necessitates the use of external equipment or power units, such as pneumatic or electric actuators, increasing equipment complexity and maintenance difficulty. Furthermore, the sealing surfaces are subjected to substantial fluid pressure, making them prone to wear or seal failure, leading to leakage.

[0004] Therefore, based on the above-mentioned technical problems, it is necessary for those skilled in the art to develop a bidirectional sealing flange type triple eccentric butterfly valve. Utility Model Content

[0005] The purpose of this invention is to provide a bidirectional sealing flange type triple eccentric butterfly valve to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A technical solution for a bidirectional sealing flange type triple eccentric butterfly valve includes a valve body, a valve seat, a valve disc assembly, and a valve stem operating mechanism;

[0008] The valve body is provided with a valve body fixing hole;

[0009] The valve disc assembly includes an eccentric valve disc mounted in the valve body via a valve shaft.

[0010] The valve stem operating mechanism includes a rotating handle connected to the valve shaft, a movable pressure handle, and movable teeth disposed on the movable pressure handle. The valve seat is provided with a toothed disc, and the movable teeth mesh with the teeth on the toothed disc.

[0011] As a preferred technical solution, the eccentric valve disc adopts a triple eccentric structure design.

[0012] As a preferred technical solution, the movable pressure handle is connected to the rotating grip via a pivot.

[0013] As a preferred technical solution, the toothed disc has a fan-shaped or circular structure, with the teeth distributed circumferentially.

[0014] As a preferred technical solution, a bearing or bushing is provided between the valve shaft and the valve body.

[0015] As a preferred technical solution, the valve seat is made of a metal sealing ring or a composite sealing material.

[0016] Compared with existing technologies, the advantages of this invention are: by employing a triple-eccentric structure for the eccentric valve disc and valve seat, a metal hard seal or composite seal can be achieved when closed, effectively avoiding the sealing failure problem caused by unidirectional pressure in traditional butterfly valves. This structure enables the butterfly valve to maintain good sealing performance under bidirectional fluid pressure, making it particularly suitable for harsh operating conditions with high pressure, high temperature, or corrosive media, significantly improving the reliability and service life of the valve.

[0017] The movable teeth on the movable handle mesh with the teeth on the toothed disc of the rotating handle to form a force-saving lever mechanism. The operator can easily drive the valve shaft to rotate by pressing down the movable handle, which greatly reduces the manual torque required to open and close the valve. This solves the problem of traditional butterfly valves being difficult to operate under high pressure and requiring an external power source, thus improving the convenience and safety of operation. Attached Figure Description

[0018] Figure 1 This is a front structural diagram of a bidirectional sealing flange type triple eccentric butterfly valve;

[0019] Figure 2 This is a schematic diagram of the horizontal structure of a bidirectional sealing flange type triple eccentric butterfly valve;

[0020] Figure 3 This is a three-dimensional structural diagram of a bidirectional sealing flange type triple eccentric butterfly valve.

[0021] In the attached diagram, the following are the reference numerals: 1. Valve body; 11. Valve body fixing hole; 2. Valve seat; 31. Rotating handle; 32. Movable pressure handle; 33. Movable tooth; 34. Tooth disc; 35. Tooth mouth; 36. Valve shaft; 37. Eccentric valve disc. Detailed Implementation

[0022] The features and exemplary embodiments of various aspects of this utility model will now be described in detail. To make the objectives, technical solutions, and advantages of this utility model clearer, the following description, in conjunction with the accompanying drawings and specific embodiments, will provide a further detailed description. For those skilled in the art, this utility model can be implemented without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of this utility model by illustrating examples.

[0023] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model provides a technical solution for a bidirectional sealing flange type triple eccentric butterfly valve, including a valve body 1, a valve seat 2, a valve disc assembly, and a valve stem operating mechanism.

[0024] The valve body 1 is provided with a valve body fixing hole 11 for fixing the butterfly valve to the pipeline system. The valve body 1 is made of high-strength metal material to ensure sufficient structural strength under high pressure and high temperature environments.

[0025] The valve disc assembly includes an eccentric valve disc 37 mounted within the valve body 1 via a valve shaft 36. The eccentric valve disc 37 employs a triple-eccentric structure design, with specific eccentric parameters set according to actual operating conditions. This triple-eccentric structure ensures good sealing contact between the valve disc and the valve seat 2 when closed, achieving a metal hard seal or composite seal. Bearings or bushings are provided between the valve shaft 36 and the valve body 1 to reduce rotational friction, ensure the flexibility of the valve shaft 36's rotation, and simultaneously support and position the valve shaft 36.

[0026] The valve stem operating mechanism includes a rotating handle 31 connected to the valve shaft 36, a movable pressure handle 32, and movable teeth 33 disposed on the movable pressure handle 32. The movable pressure handle 32 is connected to the rotating handle 31 via a pivot, allowing the movable pressure handle 32 to rotate relative to the rotating handle 31 around the pivot. The valve seat 2 is provided with a toothed disc 34 with toothed edges 35. The toothed disc 34 has a fan-shaped or circular structure, and the teeth 35 on it are distributed circumferentially. The movable teeth 33 mesh with the teeth 35 on the toothed disc 34 to form a force-saving lever mechanism.

[0027] Valve seat 2 is made of metal sealing ring or composite sealing material. The appropriate material is selected according to different media characteristics and working conditions to ensure good sealing performance and corrosion resistance.

[0028] When installing a bidirectional sealing flange type triple eccentric butterfly valve, first connect and fix the valve body 1 to the pipeline system through the valve body fixing hole 11 to ensure a firm connection and good sealing.

[0029] When the valve needs to be opened, the operator holds the rotating handle 31 and presses down the movable handle 32. Since the movable tooth 33 meshes with the toothed edge 35 on the toothed disc 34, a force-saving lever mechanism is formed. The force generated by pressing down the movable handle 32 is transmitted to the valve shaft 36 through the lever action, causing the valve shaft 36 to drive the eccentric valve disc 37 to rotate around the center of the valve shaft 36. The eccentric valve disc 37 gradually moves away from the valve seat 2, opening the valve passage, and fluid can pass through the valve.

[0030] When the valve needs to be closed, the operator reverses the operation, lifting the movable lever 32. This, along with the force-saving lever mechanism, causes the valve shaft 36 to rotate the eccentric valve disc 37 in the opposite direction. The eccentric valve disc 37 gradually approaches and tightly fits against the valve seat 2. Due to the triple eccentric structure of the eccentric valve disc 37, a good seal is achieved when closed, effectively preventing fluid leakage and closing the valve. Throughout the operation, the force-saving lever mechanism significantly reduces the manual torque required to open and close the valve, improving operational convenience and safety.

[0031] The working principle and usage process of this utility model: After assembling the various components of this solution in sequence, work according to the above implementation methods according to actual needs to complete all working steps.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] The embodiments described above are not exhaustive, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the invention, enabling those skilled in the art to effectively utilize the invention and its modifications. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A bidirectional sealing flange type triple eccentric butterfly valve, characterized in that, Includes valve body (1), valve seat (2), valve disc assembly and valve stem operating mechanism; The valve body (1) is provided with a valve body fixing hole (11); The valve assembly includes an eccentric valve disc (37) mounted in the valve body (1) via a valve shaft (36); The valve stem operating mechanism includes a rotating handle (31) connected to the valve shaft (36), a movable pressure handle (32), and movable teeth (33) provided on the movable pressure handle (32). The valve seat (2) is provided with a toothed disc (34) with toothed edges (35), and the movable teeth (33) mesh with the toothed edges (35) on the toothed disc (34).

2. The bidirectional sealing flange type triple eccentric butterfly valve according to claim 1, characterized in that: The eccentric valve disc (37) adopts a triple eccentric structure design.

3. The bidirectional sealing flange type triple eccentric butterfly valve according to claim 2, characterized in that: The movable pressure handle (32) is connected to the rotating grip (31) via a pivot.

4. A bidirectional sealing flange type triple eccentric butterfly valve according to claim 3, characterized in that: The toothed disc (34) has a fan-shaped or circular structure, and the teeth (35) on it are distributed circumferentially.

5. A bidirectional sealing flange type triple eccentric butterfly valve according to claim 4, characterized in that: A bearing or bushing is provided between the valve shaft (36) and the valve body (1).

6. A bidirectional sealing flange type triple eccentric butterfly valve according to claim 5, characterized in that: The valve seat (2) is made of a metal sealing ring or a composite sealing material.

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