Adjustable butterfly valve

Abstract

The utility model discloses an adjustable butterfly valve, and belongs to the technical field of valves. Comprising a first control part and a second control part, circulation windows are formed in the first control part and the second control part, the first control part and the second control part completely wrap an opening of a circulation channel, the first control part and the second control part are fixedly installed on the valve body, a spherical flow adjusting ball is defined by the first control part and the second control part, and the butterfly plate rotates in the flow adjusting ball. The butterfly plate rotates to different positions, so that when the butterfly valve is in different opening degrees, the positions of the first control piece and the second control piece cannot change along with the butterfly plate, and the stable fluid medium state can be adjusted; when a fluid medium passes through the butterfly valve, the fluid medium reaches an ideal flow state through the butterfly plate, the first control piece and the second control piece, meanwhile, the circulation window provides conditions for adjustment, the flow resistance is increased after the fluid medium passes through the butterfly valve, and the butterfly valve can conduct flow adjustment under different opening degrees.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and more particularly to an adjustable butterfly valve. Background Art

[0002] A butterfly valve is a valve whose closing element (disc or disc) is a disc that rotates around the valve axis to open and close. It primarily serves as a shutoff and throttling mechanism in pipelines. The disc-shaped disc rotates within the valve body, opening, closing, or regulating the flow. Butterfly valves are suitable for use in pipelines conveying various corrosive and non-corrosive fluids in engineering systems, regulating and shutting off the flow of these media.

[0003] During butterfly valve operation, due to the structural limitations of the disc, cavitation, erosion, vibration, and noise are easily generated within a small opening range (less than 20°). Therefore, adjustment and flow control are generally not allowed under these operating conditions. Furthermore, within a wide opening range (70-90°), the flow rate remains essentially unchanged, making flow control difficult. Consequently, existing butterfly valves are difficult to adjust within their full opening range, making it difficult to meet the varying flow requirements of pipeline systems. Utility Model Content

[0004] The utility model provides an adjustable butterfly valve, which can adjust the flow rate within different opening ranges of the butterfly valve.

[0005] In order to achieve the above-mentioned purpose, the technical solution provided by the present utility model is:

[0006] An adjustable butterfly valve, comprising:

[0007] a valve body, in which a flow passage is defined;

[0008] a butterfly plate rotatably located in the flow channel, wherein different rotation angles of the butterfly plate correspond to different openings of the butterfly valve;

[0009] Also includes:

[0010] The first control and the second control are located in the circulation channel, are fixedly mounted on the valve body, and have a number of circulation windows on the controls; the first control and the second control completely cover the opening of the circulation channel, and at the same time, the first control and the second control surround a spherical flow regulating ball, and the butterfly plate rotates in the flow regulating ball.

[0011] As a further improvement, the circulation window includes a first circulation window and a second circulation window, the first circulation window is in the shape of a circular hole, and the second circulation window is in the shape of an arc-shaped slot.

[0012] As a further improvement, on the first control and the second control, the first circulation window is arranged around the central array of the flow regulating balls, and the second circulation window is arranged around the central array of the flow regulating balls.

[0013] As a further improvement, the rear arrangement position of the first circulation window array and the rear arrangement position of the second circulation window array are alternately arranged.

[0014] As a further improvement, the total area of the circulation windows accounts for 50% to 70% of the full diameter area of the circulation channel.

[0015] As a further improvement, the inner side wall of the flow channel of the valve body protrudes to form a valve seat, and a sealing ring is installed on the outer ring of the butterfly plate. When the butterfly plate rotates until the sealing ring is in full contact with the valve seat, the butterfly valve is closed.

[0016] As a further improvement, the first control is installed on one side of the valve seat, and the second control is installed on the inner side wall of the circulation channel.

[0017] As a further improvement, the butterfly plate is fixedly connected to the valve shaft relative to each other, and when the valve shaft rotates, the butterfly plate is driven to rotate synchronously.

[0018] The technical solution provided by the present invention has the following beneficial effects compared with the prior art: in this solution, a first control and a second control are provided, and a circulation window is provided on the first control and the second control. The first control and the second control fully cover the opening of the circulation channel. The first control and the second control are arranged to form a spherical flow regulating ball, and the butterfly plate rotates in the flow regulating ball. When the butterfly plate rotates to different positions, the butterfly valve is at different openings. The positions of the first control and the second control will not change with the butterfly plate, and the state of the fluid medium can be stably adjusted; when the fluid medium passes through the butterfly valve, the fluid medium reaches a more ideal flow state through the butterfly plate, the first control and the second control, effectively reducing or preventing cavitation. At the same time, the circulation window provides conditions for adjusting the flow state of the medium. The flow resistance increases after passing through the butterfly valve, so that the butterfly valve can adjust the flow at different openings.

[0019] Other technical problems that can be solved by the adjustable butterfly valve of the present invention, other technical features included in the technical solution, and the advantages brought by these technical features will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the main view of the overall structure of the butterfly valve;

[0021] Figure 2 for Figure 1 Sectional view of the middle butterfly valve AA;

[0022] Figure 3This is a top view of the overall structure of the butterfly valve;

[0023] Figure 4 This is the main view of the valve body structure;

[0024] Figure 5 It is a cross-sectional view of the valve body structure;

[0025] Figure 6 This is a schematic diagram of the butterfly valve in the closed state;

[0026] Figure 7 This is a schematic diagram of the butterfly valve opening at 10°;

[0027] Figure 8 This is a schematic diagram of the butterfly valve opening at 20°;

[0028] Figure 9 This is a schematic diagram of the butterfly valve opening at 30°;

[0029] Figure 10 This is a schematic diagram of the butterfly valve opening at 50°;

[0030] Figure 11 This is a schematic diagram of the butterfly valve opening at 90°.

[0031] Description of labels:

[0032] 1. Valve body; 11. First control; 12. Second control; 111. First circulation window; 112. Second circulation window; 13. Valve seat; 2. Butterfly plate; 21. Sealing ring; 3. Valve shaft; 4. Transmission assembly. DETAILED DESCRIPTION

[0033] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings and embodiments.

[0034] The structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in this specification so as to facilitate understanding and reading by those familiar with this technology. They are not intended to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modifications, changes in proportional relationships, or adjustments in size, without affecting the efficacy and objectives that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed in the present invention.

[0035] At the same time, the terms such as "upper", "lower", "left", "right", and "middle" cited in this specification are only for the convenience of description and are not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially changing the technical content, should also be considered as the scope of implementation of this utility model. In addition, in addition to being used to indicate orientation or positional relationships, some of the above terms may also be used to express other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0036] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, for the purposes of describing the embodiments of the present application herein.

[0037] This embodiment provides an adjustable butterfly valve, which is installed in a pipeline system for conveying fluid medium and mainly serves to cut off and throttle the fluid medium in the pipeline.

[0038] Combine Figure 1-3 As shown, an adjustable butterfly valve includes a valve body 1 , a butterfly plate 2 , a first control 11 and a second control 12 .

[0039] A flow channel is defined within the valve body 1; a butterfly disc 2 is rotatably positioned within the flow channel, with different rotation angles of the disc 2 corresponding to different openings of the butterfly valve. Specifically, a valve seat 13 is formed by a protruding protrusion on the inner sidewall of the flow channel of the valve body 1. A sealing ring 21 is mounted on the outer ring of the disc 2. The disc 2 is rotated until the sealing ring 21 fully contacts the valve seat 13, corresponding to the closing of the butterfly valve.

[0040] The butterfly valve also includes a valve shaft 3, and the butterfly plate 2 is relatively fixedly connected to the valve shaft 3. When the valve shaft 3 rotates, the butterfly plate 2 is driven to rotate synchronously. Figure 2 As shown in the middle view, the valve shaft 3 comprises an upper valve shaft and a lower valve shaft. Both the upper and lower valve shafts pass through the valve body 1 and are rotatably connected relative to the valve body 1. One end of each shaft is fixedly connected to the butterfly plate 2 via a pin. The other end of the upper valve shaft extends outside the valve body 1 and is connected to the transmission assembly 4. The transmission assembly 4 is used to drive the upper valve shaft to rotate, thereby driving the butterfly plate 2 to different positions. The transmission assembly 4 can be a conventional drive mechanism, such as a motor.

[0041] Combine Figure 4 and Figure 5As shown, the first control 11 and the second control 12 in the butterfly valve in this embodiment are located in the circulation channel and are both fixedly mounted on the valve body 1. After the first control 11 and the second control 12 are installed, the side surface area close to the circulation channel is smaller than the side surface area away from the circulation channel. Moreover, the first control 11 and the second control 12 are both provided with a plurality of circulation windows; and the first control 11 and the second control 12 respectively fully cover the opening of the circulation channel, and the butterfly plate 2 is located between the first control 11 and the second control 12. Specifically, the first control 11 is mounted on one side of the valve seat 13, and the second control 12 is mounted on the inner wall of the circulation channel, so that the first control 11 and the second control 12 are arranged to form a spherical flow regulating ball, and the butterfly plate 2 rotates inside the flow regulating ball.

[0042] As a further improvement, the circulation window includes a first circulation window 111 and a second circulation window 112. The first circulation window 111 is in the shape of a circular hole, and the second circulation window 112 is in the shape of an arc-shaped slot. On the first control 11 and the second control 12, the first circulation window 111 is arranged around the center array of the flow regulating balls, and the second circulation window 112 is arranged around the center array of the flow regulating balls. Moreover, the positions of the first circulation windows 111 and the second circulation windows 112 are arranged alternately after the array. Of course, in other embodiments, the positions of the first circulation windows 111 and the second circulation windows 112 can also be arranged in other ways.

[0043] In addition, the total area of the circulation windows accounts for 60% of the full diameter area of the circulation channel. In other cases, the ratio of the total area of the circulation windows to the full diameter area of the circulation channel can also be set to other ratios, but the total area of the circulation windows is required to account for 50% to 70% of the full diameter area of the circulation channel.

[0044] The circulation window includes a first circulation window 111 and a second circulation window 112, and the first circulation window 111 is in the shape of a circular hole, and the second circulation window 112 is in the shape of an arc-shaped slot, which can enable the first control 11 and the second control 12 to play a better energy dissipation role, reduce the vibration and impact of the fluid on the butterfly plate, and thus reduce cavitation.

[0045] Combine Figure 6-11 The figure shows the butterfly valve opening states when the butterfly plate 2 is rotated to different positions, namely 0° (butterfly valve closed state), 10°, 20°, 30°, 50°, and 90° (butterfly valve fully open state). Before the improvement, when the first control 11 and the second control 12 were not provided, the fluid pressure difference on both sides of the butterfly plate was large when the butterfly valve opening was different, especially in the small opening range. In this case, cavitation is likely to occur. In addition, the fluid flow resistance on both sides of the butterfly plate is small, and the flow regulation effect is not obvious, especially in the large opening range of the butterfly valve.

[0046] After the improvement, the fluid medium enters from the first control 11 side and flows out from the second control 12 side as an example for explanation. When the butterfly valve is at different openings, the fluid medium passes through the adjustment of the circulation window on the first control 11, then flows through the butterfly plate 2, and finally passes through the adjustment of the circulation window on the second control 12. The existence of the circulation window occupies the circulation area, increases the throttling, and provides conditions for adjusting the flow state. The fluid medium undergoes three pressure reduction adjustments when passing through the butterfly valve, which increases the flow resistance of the fluid medium through the butterfly valve, so that the butterfly valve can adjust the flow at different openings. At the same time, after the medium is adjusted, the fluid flow state is fully changed to achieve an ideal flow state, thereby realizing flow regulation, and can reduce cavitation, reduce damage to the butterfly valve, and extend the service life of the valve.

[0047] The terms "installed," "disposed," "equipped with," and "connected" used herein should be interpreted broadly. For example, they may refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0048] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the inventive purpose of the present invention, designs a structure and embodiment similar to the technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. An adjustable butterfly valve, comprising: a valve body (1) having a flow passage formed therein; A butterfly plate (2) is rotatably located in the flow channel, and different angles of rotation of the butterfly plate (2) correspond to different openings of the butterfly valve; It is characterized by further comprising: The first control (11) and the second control (12) are located in the circulation channel and are fixedly mounted on the valve body (1), and a plurality of circulation windows are provided on the controls; the first control (11) and the second control (12) completely cover the opening of the circulation channel, and the first control (11) and the second control (12) are surrounded by a spherical flow regulating ball, and the butterfly plate (2) rotates in the flow regulating ball.

2. The adjustable butterfly valve according to claim 1, characterized in that: The circulation window comprises a first circulation window (111) and a second circulation window (112); the first circulation window (111) is in the shape of a circular hole, and the second circulation window (112) is in the shape of an arc-shaped slot.

3. The adjustable butterfly valve according to claim 2, characterized in that: On the first control (11) and the second control (12), the first circulation window (111) is arranged around the center array of the flow regulating balls, and the second circulation window (112) is arranged around the center array of the flow regulating balls.

4. The adjustable butterfly valve according to claim 3, characterized in that: The rear arrangement position of the first circulation windows (111) and the rear arrangement position of the second circulation windows (112) are alternately arranged.

5. The adjustable butterfly valve according to any one of claims 1 to 4, characterized in that: The total area of the circulation windows accounts for 50% to 70% of the full diameter area of the circulation channel.

6. The adjustable butterfly valve according to claim 1, characterized in that: The inner side wall of the flow channel of the valve body (1) protrudes to form a valve seat (13), and a sealing ring (21) is installed on the outer ring of the butterfly plate (2). When the butterfly plate (2) rotates until the sealing ring (21) is in full contact with the valve seat (13), the butterfly valve is closed.

7. The adjustable butterfly valve according to claim 6, characterized in that: The first control (11) is installed on one side of the valve seat (13), and the second control (12) is installed on the inner wall of the circulation channel.

8. The adjustable butterfly valve according to claim 6, characterized in that: The butterfly plate (2) is fixedly connected to the valve shaft (3) relative to each other, and when the valve shaft (3) rotates, the butterfly plate (2) is driven to rotate synchronously.

Images