Double-eccentric flange butterfly valve

Abstract

The utility model discloses a double-eccentric flange butterfly valve, which relates to the technical field of double-eccentric flange butterfly valves, and comprises a valve body, two first flange plates are symmetrically and fixedly connected to two ends of the valve body, a rubber sleeve is fixedly connected to the inner wall of the valve body, an upper valve rod and a lower valve rod are symmetrically arranged at two ends of the inner wall of the valve body, and both the upper valve rod and the lower valve rod are sleeved with an eccentric sleeve. A first butterfly plate is fixedly connected to the eccentric sleeve, and a second butterfly plate is fixedly connected to the bottom end of the first butterfly plate; the first butterfly plate and the second butterfly plate are fixedly connected and matched, so that the overall structural strength of the butterfly plate is enhanced, high-pressure hydraulic impact is conveniently resisted, the damage resistance of the butterfly plate is improved, and the function of reducing damage or breakage of the butterfly plate due to impact can be achieved; finally, the problem that the double-eccentric flange butterfly valve cannot be normally used due to the fact that the valve plate is prone to damage or fracture due to high-pressure hydraulic impact in the prior art is solved, the service life of the double-eccentric flange butterfly valve is prolonged, and the working reliability of the double-eccentric flange butterfly valve is improved.

Description

Technical Field

[0001] This utility model relates to the field of double eccentric flange butterfly valve technology, and in particular to a double eccentric flange butterfly valve. Background Technology

[0002] A butterfly valve is a type of valve whose opening and closing element is a disc-shaped butterfly plate. The butterfly plate rotates around the axis of the valve stem to open or close the valve. It mainly plays a role in shutting off and throttling in pipelines. With the development of industrial technology, ordinary butterfly valves can no longer meet the needs of industry. In order to meet the requirements of various working conditions, butterfly valves have successively evolved into concentric, single eccentric and double eccentric valves.

[0003] In existing pinless double eccentric butterfly valves, a valve plate is used instead of a pin to connect the upper and lower valve stems. However, the valve plate is subject to vibration due to long-term impact from high-pressure water, which can easily cause damage or breakage, rendering the double eccentric flange butterfly valve unusable. Therefore, improvements are needed to address these issues. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a double eccentric flange butterfly valve.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a double eccentric flange butterfly valve, comprising a valve body, two first flanges symmetrically fixed to both ends of the valve body, a rubber sleeve fixed to the inner wall of the valve body, an upper valve stem and a lower valve stem symmetrically provided at both ends of the inner wall of the valve body, both the upper valve stem and the lower valve stem being sleeved with an eccentric sleeve, a first butterfly plate fixed to the eccentric sleeve, and a second butterfly plate fixed to the bottom end of the first butterfly plate.

[0006] Preferably, the first butterfly plate has multiple U-shaped water inlet channels. One end of the U-shaped water inlet channel is located near the top periphery of the first butterfly plate, and the other end of the U-shaped water inlet channel is located near the axis of the first butterfly plate. The U-shaped water inlet channels are arranged in a ring around the axis of the first butterfly plate.

[0007] Preferably, the rubber sleeve has two mounting rings at the second butterfly plate, and a lip-shaped sealing ring is provided between the two mounting rings.

[0008] Preferably, one end of the eccentric sleeve penetrates the outer wall of the valve body, and a second flange is provided on the end of the eccentric sleeve located on the outer wall of the valve body. A drive motor is connected to the second flange, and multiple fixing bolts are provided between the drive motor and the second flange.

[0009] Preferably, one end of the upper valve stem is coaxially fixed to the output shaft of the drive motor, and one end of the lower valve stem is fixed to the valve body.

[0010] Preferably, the outer wall of the second butterfly plate abuts against the outer wall of the lip-shaped sealing ring.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model enhances the overall structural strength of the butterfly plate by fixing the first butterfly plate and the second butterfly plate together, making it easier to resist high-pressure water impact and improving the butterfly plate's resistance to damage. This reduces the damage or breakage of the butterfly plate due to impact. Furthermore, the U-shaped water channel arranged in a ring along the axis of the first butterfly plate facilitates the guidance of water flow, reduces the direct impact force of water flow on the butterfly plate, and improves the stability of the butterfly plate under water flow impact. This reduces the vibration of the butterfly plate and ultimately solves the problem in the prior art where the valve plate is easily damaged or broken by high-pressure water impact, causing the double eccentric flange butterfly valve to malfunction. This improves the service life and operational reliability of the double eccentric flange butterfly valve. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0013] Figure 1 This is a first-view schematic diagram of the overall structure proposed in this utility model;

[0014] Figure 2 This is a second-view schematic diagram of the overall structure proposed in this utility model;

[0015] Figure 3 This is a first-view schematic diagram of the overall cross-sectional structure proposed in this utility model;

[0016] Figure 4 This is a first-view schematic diagram of the partial cross-sectional structure proposed in this utility model;

[0017] Figure 5 This is an enlarged cross-sectional view of the lip-shaped sealing ring proposed in this utility model.

[0018] The numbers in the diagram are: 1. Valve body; 2. First flange; 3. Upper valve stem; 4. Rubber sleeve; 5. Eccentric sleeve; 6. First butterfly plate; 7. Second butterfly plate; 8. U-shaped water inlet groove; 9. Lip seal ring; 10. Drive motor; 11. Second flange; 12. Mounting ring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Example: See Figure 1-5 This utility model discloses a double eccentric flange butterfly valve, comprising a valve body 1, with two first flanges 2 symmetrically fixed to both ends of the valve body 1. A rubber sleeve 4 is fixed to the inner wall of the valve body 1. An upper valve stem 3 and a lower valve stem are symmetrically arranged at both ends of the inner wall of the valve body 1. Both the upper and lower valve stems are sleeved with an eccentric sleeve 5. A first butterfly plate 6 is fixed to the eccentric sleeve 5, and a second butterfly plate 7 is fixed to the bottom end of the first butterfly plate 6. The first flanges 2 facilitate the connection and installation of the valve body 1 with the pipeline. The rubber sleeve 4 enhances the internal sealing of the valve body 1. The upper and lower valve stems cooperate with the eccentric sleeve 5 to realize the rotation of the butterfly plate, thereby controlling the opening and closing of the valve. The combined structure of the first butterfly plate 6 and the second butterfly plate 7 enhances the overall strength of the butterfly plate, improves the ability to resist high-pressure water impact, reduces the risk of butterfly plate damage or breakage, and ensures the normal use of the valve. Multiple U-shaped openings are provided inside the first butterfly plate 6. The U-shaped water inlet trough 8 has one outlet located near the top periphery of the first butterfly plate 6, and the other outlet located near the axis of the first butterfly plate 6. The U-shaped water inlet trough 8 is arranged in a ring along the axis of the first butterfly plate 6. The design of the U-shaped water inlet trough 8 can guide the water flow, so that the impact force of the water flow is dispersed and buffered when the water flows through the butterfly plate, reducing the direct impact of the water flow on the butterfly plate, reducing the vibration of the butterfly plate under high pressure hydraulic action, and further improving the stability and service life of the butterfly plate. The rubber sleeve 4 is provided with two mounting rings 12 at the second butterfly plate 7, and a lip seal ring 9 is provided between the two mounting rings 12. The mounting rings 12 provide a position for the installation and fixing of the lip seal ring 9. The lip seal ring 9 can enhance the sealing between the second butterfly plate 7 and the valve body 1, prevent media leakage, improve the sealing performance of the valve, and ensure the reliability of the valve during use.

[0021] In this utility model, one end of the eccentric sleeve 5 penetrates the outer wall of the valve body 1. A second flange 11 is provided on the end of the eccentric sleeve 5 located on the outer wall of the valve body 1. A drive motor 10 is connected to the second flange 11. Multiple fixing bolts are provided between the drive motor 10 and the second flange 11. The second flange 11 facilitates the connection and docking of the drive motor 10 and the eccentric sleeve 5. The drive motor 10 provides power for the rotation of the eccentric sleeve 5, thereby driving the rotation of the butterfly plate, realizing automatic control of the valve, and improving the convenience and efficiency of valve operation. One end of the upper valve stem 3 is coaxially fixed to the output shaft of the drive motor 10, and the lower valve stem... One end is fixedly connected to the valve body 1, and the upper valve stem 3 is coaxially fixedly connected to the output shaft of the drive motor 10, which ensures that the power of the drive motor 10 is accurately transmitted to the upper valve stem 3, thereby driving the butterfly plate to rotate; the lower valve stem is fixedly connected to the valve body 1, providing stable support for the rotation of the butterfly plate, ensuring the stability and accuracy of the butterfly plate rotation; the outer wall of the second butterfly plate 7 abuts against the outer wall of the lip sealing ring 9, and this abutting fit further enhances the sealing effect of the valve, effectively preventing the medium from leaking at the gap between the second butterfly plate 7 and the valve body 1, improving the sealing performance and working reliability of the valve, and ensuring the normal use of the valve under different working conditions.

[0022] Working Principle: When this utility model is used, if the valve needs to be opened, the drive motor 10 is started, and the output shaft of the drive motor 10 begins to rotate. Since one end of the upper valve stem 3 is coaxially fixed to the output shaft of the drive motor 10, the rotation of the drive motor 10 will drive the upper valve stem 3 to rotate synchronously. Both the upper valve stem 3 and the lower valve stem are sleeved on the eccentric sleeve 5. Therefore, the rotation of the upper valve stem 3 will cause the eccentric sleeve 5 to rotate as well. The first butterfly plate 6 and the second butterfly plate 7 are fixedly connected to the eccentric sleeve 5. Therefore, the first butterfly plate 6 and the second butterfly plate 7 will rotate around the axis of the valve stem. As the butterfly plates rotate, the valve gradually opens, and the medium begins to flow in the pipeline. During the flow of the medium, the multiple U-shaped water inlets 8 opened in the first butterfly plate 6 play a role. Since the U-shaped water inlets 8 are arranged in a ring along the axis of the first butterfly plate 6, and one end of the outlet is close to the top periphery of the first butterfly plate 6, and the other end of the outlet is close to the axis of the first butterfly plate 6, when the medium flows through the butterfly plate, some of the medium will enter the U-shaped water inlets. The water trough 8 and U-shaped water inlet trough 8 guide the flow direction of the medium, dispersing and buffering the impact force of the medium, reducing the direct impact of the medium on the butterfly plate, reducing the vibration of the butterfly plate under high pressure water, and protecting the structural integrity of the butterfly plate. In the closed state of the valve, the outer wall of the second butterfly plate 7 abuts against the outer wall of the lip seal ring 9. The lip seal ring 9 is installed between the two mounting rings 12 of the rubber sleeve 4 located at the second butterfly plate 7. This structure enhances the sealing between the second butterfly plate 7 and the valve body 1. When the butterfly plate rotates to the closed position, the lip seal ring 9 can effectively prevent the medium from leaking at the gap between the second butterfly plate 7 and the valve body 1, ensuring the sealing performance of the valve. When it is necessary to close the valve, the drive motor 10 rotates in the opposite direction, driving the upper valve stem 3, the eccentric sleeve 5, and the first butterfly plate 6 and the second butterfly plate 7 to rotate in the opposite direction. As the butterfly plate rotates, the valve gradually closes until the butterfly plate completely blocks the flow channel of the medium, realizing the valve closing function; the device is now in use.

[0023] 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.

Claims

1. A double eccentric flanged butterfly valve comprising a valve body (1), characterized in that: Two first flange plates (2) are symmetrically fixed to both ends of the valve body (1), a rubber sleeve (4) is fixed to the inner wall of the valve body (1), upper valve rods (3) and lower valve rods are symmetrically arranged at both ends of the inner wall of the valve body (1), the upper valve rods (3) and the lower valve rods are sleeved with eccentric sleeves (5), the eccentric sleeves (5) are fixedly provided with first butterfly plates (6), and the first butterfly plates (6) are fixedly provided with second butterfly plates (7) at the bottom ends.

2. A double eccentric flanged butterfly valve according to claim 1, characterized in that: A plurality of U-shaped water guide grooves (8) are arranged in the first butterfly plates (6), one end of the U-shaped water guide grooves (8) is arranged at the top surface of the first butterfly plates (6), the other end of the U-shaped water guide grooves (8) is arranged at the axis of the first butterfly plates (6), and the U-shaped water guide grooves (8) are arranged in a ring shape along the axis of the first butterfly plates (6).

3. A double eccentric flanged butterfly valve according to claim 2, characterized in that: The rubber sleeve (4) is provided with two mounting rings (12) at the second butterfly plate (7), and a lip-shaped sealing ring (9) is arranged between the two mounting rings (12).

4. The double eccentric flanged butterfly valve according to claim 3, characterized in that: One end of the eccentric sleeve (5) penetrates the outer wall of the valve body (1), the second flange plate (11) is arranged at one end of the outer wall of the valve body (1), the driving motor (10) is arranged in abutment on the second flange plate (11), and a plurality of fixing bolts are arranged between the driving motor (10) and the second flange plate (11).

5. A double eccentric flanged butterfly valve according to claim 4, characterized in that: One end of the upper valve rod (3) is coaxially fixed to the output shaft of the driving motor (10), and one end of the lower valve rod is fixed to the valve body (1).

6. A double eccentric flanged butterfly valve according to claim 5, characterized in that: The outer wall of the second butterfly plate (7) abuts against the outer wall of the lip-shaped sealing ring (9).

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