Double-disc type fluid regulation and control butterfly valve

Abstract

The utility model discloses a double-disc type fluid regulation and control butterfly valve which comprises a valve body, a main medium flow channel and a large butterfly plate are arranged in the valve body, an auxiliary medium flow channel capable of being sealed by a small butterfly plate is arranged in the large butterfly plate, and the double-disc type fluid regulation and control butterfly valve further comprises an angle control assembly used for controlling the angle of the large butterfly plate and the angle of the small butterfly plate. According to the double-butterfly-plate butterfly valve, independent and accurate control over the large butterfly plate and the small butterfly plate is achieved, the problem that in an existing double-butterfly-plate butterfly valve, two butterfly plates need to be adjusted at the same time is solved, when the flow of a main medium flow channel needs to be adjusted, the large butterfly plate is driven by the air cylinder to be adjusted synchronously, and when the small flow needs to be finely controlled, the large butterfly plate is driven by the air cylinder to be adjusted synchronously. The angle of the small butterfly plate can be independently adjusted, the large butterfly plate does not need to be synchronously adjusted, and the operation process is greatly simplified; through the meshing locking design of the meshing handle and the half gear ring, the synchronism of the large butterfly plate and the small butterfly plate during overall adjustment is ensured, and meanwhile convenience is provided when the small butterfly plate needs to be independently adjusted.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, and in particular to a double-disc fluid control butterfly valve. Background Technology

[0002] A butterfly valve is a type of valve that controls the flow or interruption of fluid flow by rotating a disc-shaped butterfly plate.

[0003] A typical butterfly valve has only one butterfly plate, resulting in a relatively crude flow control method. To improve the accuracy of flow control, a double-butterfly-plate triple-eccentric all-metal hard-seal butterfly valve was disclosed in application number CN202221150296.1. This type of butterfly valve only requires opening the small butterfly plate when a small flow is needed. However, this butterfly valve has certain inconveniences. For example, there is no transmission mechanism between the two valve stems used to connect the large and small butterfly plates, which makes the butterfly valve more inclined to automatic control. If a manual control handwheel or other device is added, the small butterfly plate will remain relatively stationary when the operator only needs to independently adjust the angle of the large butterfly plate. That is, the operator also needs to independently adjust the angle of the small butterfly valve when adjusting the angle of the large butterfly plate, which is cumbersome. Therefore, improvements are needed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a dual-disc fluid control butterfly valve to solve the problems mentioned in the background section.

[0005] This utility model provides the following technical solution: a double-disc fluid control butterfly valve, including a valve body, a main medium flow channel provided in the valve body, a large butterfly plate installed in the valve body, a secondary medium flow channel that can be closed by a small butterfly plate in the large butterfly plate, and an angle control component for controlling the angle between the large butterfly plate and the small butterfly plate.

[0006] A first fixing platform is fixed on the side of the large butterfly plate, and a second fixing platform is fixed on the side of the small butterfly plate. The angle control component includes two sleeves fixedly installed in the curved surface of the main medium flow channel, which are distributed vertically. A first valve stem is rotatably connected in the upper and lower sleeves respectively. The two first valve stems are connected by a connector and are fixed in the two first fixing platforms distributed vertically. A second valve stem is rotatably connected in the upper and lower first valve stems and is fixed in the second fixing platform.

[0007] The first valve stem on the upper side extends to the curved surface outside the sleeve and is fixedly provided with a mounting plate, and a half-tooth ring is fixedly provided on the mounting plate. The second valve stem passes through the first valve stem upward, and the upper end of the second valve stem is equipped with a biting handle that can cooperate with the half-tooth ring.

[0008] Preferably, the engagement handle includes a handle body, which is fixedly connected to the second valve stem, and an unlocking plate is hinged in the hollow groove on the lower side of the handle body. One end of the unlocking plate is equipped with a toothed plate that can engage or be misaligned with the semi-toothed ring.

[0009] Preferably, the unlocking plate is also connected to the top surface of the hollowed-out groove by a spring.

[0010] Preferably, the upper end of the sleeve extending outside the valve body is provided with a support platform, and the support platform is attached to the lower side of the mounting plate.

[0011] Preferably, the support platform and the upper sleeve are integrally formed.

[0012] Preferably, the connecting member includes horizontal plates fixed to the upper and lower valve stems respectively, and the two horizontal plates are connected by a vertical plate.

[0013] Preferably, the lower valve stem extends through the sleeve to the lower side of the valve body, and the valve body is equipped with a cylinder for driving the lower valve stem to rotate.

[0014] Preferably, an arrow is provided on the curved surface of the mounting plate, and the arrow is set perpendicular to the axis of the large butterfly plate.

[0015] This utility model provides a double-disc fluid control butterfly valve, which has the following beneficial effects:

[0016] This invention enables independent and precise control of the large and small butterfly plates, solving the cumbersome operation problem of needing to adjust both butterfly plates simultaneously in existing double butterfly valves. In this invention, when it is necessary to adjust the flow rate of the main medium channel, the large butterfly plate is adjusted synchronously by driving the cylinder. When it is necessary to finely control the small flow rate, the angle of the small butterfly plate can be adjusted separately without the need to adjust the large butterfly plate synchronously, which greatly simplifies the operation process.

[0017] This invention ensures the synchronization of the large and small discs during overall adjustment through the meshing and locking design of the bite handle and the semi-tooth ring, while also providing convenience when the small disc needs to be adjusted independently. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the appearance of this utility model;

[0019] Figure 2 yes Figure 1 A schematic diagram of the internal structure of the bite handle.

[0020] In the picture:

[0021] 11. Valve body; 12. Main medium flow channel; 13. Large butterfly plate; 14. Small butterfly plate; 21. Sleeve; 22. Valve stem No. 1; 24. Support platform; 31. Valve stem No. 2; 32. Mounting plate; 33. Gear ring; 34. Engaging handle; 51. Horizontal plate; 52. Vertical plate; 61. Cylinder; 81. Handle body; 82. Locking plate; 83. Gear plate; 91. Fixing platform No. 1; 92. Fixing platform No. 2. Detailed Implementation

[0022] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," 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, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication 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.

[0026] Reference Figures 1-2According to an embodiment of the present invention, a dual-disc fluid control butterfly valve includes a valve body 11, a main medium flow channel 12 is provided inside the valve body 11, and a large butterfly plate 13 capable of closing the main medium flow channel 12 is installed inside the valve body 11. A secondary medium flow channel capable of being closed by a small butterfly plate 14 is provided inside the large butterfly plate 13. The valve body 11 also includes an angle control component for controlling the angle between the large butterfly plate 13 and the small butterfly plate 14.

[0027] In this embodiment, a first fixing platform 91 is fixed on the side of the large butterfly plate 13, and a second fixing platform 92 is fixed on the side of the small butterfly plate 14. There are two first fixing platforms 91, which are respectively located on the upper and lower sides of the secondary medium flow channel. The angle control component includes two sleeves 21 fixedly installed in the curved surface of the main medium flow channel 12 and distributed vertically. A first valve stem 22 is rotatably connected in the upper and lower sleeves 21. The two first valve stems 22 are connected by a connector, and the two first valve stems 22 are respectively fixed in the two first fixing platforms 91 distributed vertically. Through the setting of the connector, when one of the first valve stems 22 is driven, it can drive the other first valve stem 22 to rotate synchronously.

[0028] In addition, a second valve stem 31 is rotatably connected inside the first valve stem 22, and the second valve stem 31 is fixed inside the second fixed platform 92.

[0029] Furthermore, the transmission relationship between the second valve stem 31 and the first valve stem 22 is set as follows: Figure 2 As shown, the first valve stem 22 on the upper side extends to the curved surface outside the sleeve 21 and is fixedly provided with a mounting plate 32, and a half toothed ring 33 is fixedly provided on the mounting plate 32. The second valve stem 31 passes through the first valve stem 22 upward, and the upper end of the second valve stem 31 is equipped with a biting handle 34 that can cooperate with the half toothed ring 33.

[0030] When the biting handle 34 engages with the half-tooth ring 33, the biting handle 34 will rotate synchronously with the half-tooth ring 33 and the mounting plate 32, that is, the second valve stem 31 will drive the first valve stem 22 to rotate synchronously.

[0031] In this embodiment, the lower valve stem 22 extends through the lower sleeve 21 to the lower side of the valve body 11. The valve body 11 is equipped with a cylinder 61 for driving the lower valve stem 22 to rotate. The cylinder 61 can control the angle of the large butterfly plate 13 by controlling the angle of the valve stem 22, so as to adjust the flow rate of the main medium flow channel 12. During this process, the mounting plate 32, the semi-tooth ring 33, the second valve stem 31 and the small butterfly plate 14 will all rotate at the same angle, that is, the small butterfly plate 14 will maintain the relative angle relationship with the large butterfly plate 13.

[0032] When the engagement handle 34 is unlocked to the half-tooth ring 33, the relative angle of the second valve stem 31 and the first valve stem 22 can be adjusted. That is, the operator can adjust the angle of the second valve stem 31 relative to the first valve stem 22 by rotating the engagement handle 34. This angle is the angle of rotation of the small butterfly plate 14 relative to the large butterfly plate 13. When the large butterfly plate 13 completely closes the main medium flow channel 12, the rotation of the small butterfly plate 14 can allow the secondary medium flow channel to circulate.

[0033] The specific structure of the biting handle 34 is as follows: the biting handle 34 includes a handle body 81, the handle body 81 is fixedly connected to the second valve stem 31, and an unlocking plate 82 is hinged in the hollow groove on the lower side of the handle body 81. One end of the unlocking plate 82 is equipped with a toothed plate 83 that can engage or be misaligned with the half toothed ring 33. In addition, the unlocking plate 82 is also connected to the top surface in the hollow groove by a spring.

[0034] When the operator pulls the unlocking plate 82 inward so that the end of the unlocking plate 82 is raised, the toothed plate 83 will sink (swing downward) and misalign with the mounting plate 32. At this time, the biting handle 34 can unlock, and the second valve stem 31 can adjust its angle relative to the first valve stem 22. When the operator releases the unlocking plate 82, the unlocking plate 82 will reset under the action of the spring, and the toothed plate 83 will re-engage with the biting handle 34, thereby completing the locking of the angles of the second valve stem 31 and the first valve stem 22, as well as the large butterfly plate 13 and the small butterfly plate 14.

[0035] Furthermore, to improve the installation stability of the mounting plate 32, a support platform 24 is provided at the upper end of the sleeve 21 extending outside the valve body 11. The support platform 24 is attached to the lower side of the mounting plate 32 (it can rotate relative to the valve body 11 and is not angle-locked). In addition, the support platform 24 can be designed to be integrally formed with the upper sleeve 21, and the handle body 81 can press against the semi-tooth ring 33 to enhance stability.

[0036] In this embodiment, the connector includes horizontal plates 51 fixed to the upper and lower valve stems 22 respectively, and the two horizontal plates 51 are connected by a vertical plate 52.

[0037] In summary, when the biting handle 34 is locked to the half-tooth ring 33, the cylinder 61 can control the overall angle adjustment of the large butterfly plate 13 and the small butterfly plate 14, thereby adjusting the opening. The operator can also engage the unlocking plate 82 and rotate the handle body 81 to adjust the angle of the second valve stem 31 relative to the first valve stem 22, that is, to adjust the angle of the small butterfly plate 14 individually, thereby performing fine flow regulation.

[0038] It should be noted that the sealing arrangements between the large butterfly plate 13 and the main medium flow channel 12, the sealing arrangements between the small butterfly plate 14 and the secondary medium flow channel, the sealing arrangements between the first valve stem 22 and the sleeve 21, and the sealing arrangements between the first valve stem 22 and the second valve stem 31 are all conventional arrangements in the prior art and will not be described in detail here. When the axis of the large butterfly plate 13 is collinear with the axis of the main medium flow channel 12, and the axis of the small butterfly plate 14 is collinear with the axis of the secondary medium flow channel, the sealing can be effective and perform sealing work.

[0039] The method by which the cylinder 61 drives the first valve rod 22 is also a conventional setting in the prior art. For example, the first valve rod 22 is equipped with a gear, and the piston rod inside the cylinder 61 is equipped with a rack that meshes with it. This will not be described in detail here.

[0040] The toothed plate 83 includes a plate body and teeth, which can be inserted upward into the half-toothed ring 33 to form an engagement lock with the half-toothed ring 33.

[0041] In addition, such as Figure 2 As shown, an arrow is also provided on the curved surface of the mounting plate 32. The arrow is set perpendicular to the axis of the large butterfly plate 13 so that the operator can know the angle and state of the large butterfly plate 13 in the double-disc fluid control butterfly valve when manually controlling the small butterfly plate 14.

[0042] The above description is only a specific embodiment of the present utility model, but the technical features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A dual-disc fluid control butterfly valve, comprising a valve body (11), wherein a main medium flow channel (12) is provided within the valve body (11), characterized in that: The valve body (11) is equipped with a large butterfly plate (13), and the large butterfly plate (13) is provided with a secondary medium flow channel that can be closed by a small butterfly plate (14). It also includes an angle control component for controlling the angle of the large butterfly plate (13) and the small butterfly plate (14). A first fixing platform (91) is fixed on the side of the large butterfly plate (13), and a second fixing platform (92) is fixed on the side of the small butterfly plate (14). The angle control component includes two sleeves (21) fixedly installed in the curved surface of the main medium flow channel (12) and distributed vertically. A first valve stem (22) is rotatably connected in the upper and lower sleeves (21). The two first valve stems (22) are connected by a connector, and the two first valve stems (22) are fixed in the two first fixing platforms (91) distributed vertically. A second valve stem (31) is rotatably connected in the upper and lower first valve stems (22), and the second valve stem (31) is fixed in the second fixing platform (92). The first valve stem (22) on the upper side extends to the curved surface outside the sleeve (21) and is fixed with a mounting plate (32), and a half toothed ring (33) is fixed on the mounting plate (32). The second valve stem (31) passes through the first valve stem (22) upward, and the upper end of the second valve stem (31) is equipped with a biting handle (34) that can cooperate with the half toothed ring (33).

2. The dual-disc fluid control butterfly valve according to claim 1, characterized in that: The biting handle (34) includes a handle body (81), which is fixedly connected to the second valve stem (31). An unlocking plate (82) is hinged in the hollow groove on the lower side of the handle body (81). One end of the unlocking plate (82) is equipped with a toothed plate (83) that can engage or be misaligned with the semi-toothed ring (33).

3. The dual-disc fluid control butterfly valve according to claim 2, characterized in that: The unlocking plate (82) is also connected to the top surface of the hollowed-out groove by a spring.

4. The dual-disc fluid control butterfly valve according to claim 1, characterized in that: The upper end of the sleeve (21) extending outside the valve body (11) is provided with a support platform (24), which is attached to the lower side of the mounting plate (32).

5. A dual-disc fluid control butterfly valve according to claim 4, characterized in that: The support platform (24) and the upper sleeve (21) are integrally formed.

6. A double-disc fluid control butterfly valve according to claim 1, characterized in that: The connector includes horizontal plates (51) fixed to the upper and lower valve stems (22) respectively, and the two horizontal plates (51) are connected by vertical plates (52).

7. A dual-disc fluid control butterfly valve according to claim 1, characterized in that: The lower valve stem (22) extends through the sleeve (21) to the lower side of the valve body (11), and the valve body (11) is equipped with a cylinder (61) for driving the lower valve stem (22) to rotate.

8. A dual-disc fluid control butterfly valve according to claim 1, characterized in that: Arrows are also provided on the curved surface of the mounting plate (32), and the arrows are set perpendicular to the axis of the large butterfly plate (13).

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