Butterfly valve

Abstract

The utility model discloses a butterfly valve, including valve body, valve plate and vacuum seal ring, vacuum seal ring is located in the valve body, the vacuum seal ring inner wall is equipped with the filter screen of ventilation resistance powder, vacuum seal ring is equipped with the suction passage of communication with filter screen, the valve plate is located in vacuum seal ring, and leaves the gap between vacuum seal ring, the valve body rotatory connection has the rotary support arm, the rotary support arm passes through the valve body and vacuum seal ring and is connected with valve plate. The utility model has can form self -sealing, need not to increase additional sealing material, and reduce the advantage that insoluble microparticle generates.

Description

Technical Field

[0001] This utility model relates to the field of food and pharmaceutical packaging equipment technology, and specifically to a butterfly valve. Background Technology

[0002] A butterfly valve is a type of valve whose closing element (valve disc or butterfly plate) is a disc that rotates around a valve shaft to open and close. In the process of sterile powder drug packaging, when the raw material powder tank is connected to the packaging equipment, a butterfly valve is needed to seal the powder tank and prevent powder leakage. However, to ensure the sealing effect, some butterfly valves are equipped with a flexible sealing structure to enhance the sealing performance. Flexible seals have high friction, and during repeated opening and closing, there is a risk of generating insoluble particles, which affects the powder packaging quality. To reduce friction, existing butterfly valves, such as the low-friction expansion sealing butterfly valve disclosed in patent CN118881748A, deform the valve seat by introducing an expansion medium into the expansion space and setting a compensation structure to compensate for the sealing performance between the valve seat and the valve plate, thereby reducing the friction between the valve plate and the valve seat. This type of butterfly valve has a complex structure and requires continuous deformation to control the seal. Too little deformation may lead to poor sealing performance, while excessive deformation may lead to high friction. The process is complicated, and repeated deformation can also lead to a short service life of the butterfly valve. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a butterfly valve that can form a self-sealing mechanism, does not require additional sealing materials, and reduces the generation of insoluble particles.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A butterfly valve includes a valve body, a valve plate, and a vacuum sealing ring. The vacuum sealing ring is disposed within the valve body, and the inner wall of the vacuum sealing ring is provided with a filter screen for ventilation and dust prevention. The vacuum sealing ring has a suction channel communicating with the filter screen. The valve plate is located inside the vacuum sealing ring and a gap is left between the valve plate and the vacuum sealing ring. The valve body is rotatably connected to a rotating support arm, which passes through the valve body and the vacuum sealing ring and is connected to the valve plate.

[0006] As a further improvement to the above technical solution:

[0007] The valve body is provided with a positioning sleeve, the rotating support arm passes through the positioning sleeve and can rotate relative to the positioning sleeve, the rotating support arm is provided with a rotating sleeve, one end of the rotating sleeve abuts against the positioning sleeve, and the abutting ends of the positioning sleeve and the rotating sleeve are respectively provided with mutually cooperating elastic positioning elements and positioning grooves.

[0008] The positioning groove is provided in multiple ways, and the multiple positioning grooves are arranged at intervals along the circumference of the rotating support arm.

[0009] The mating surface between the elastic positioning element and the positioning groove is a spherical surface.

[0010] The rotating sleeve is detachably connected to the rotating support arm via a connector.

[0011] The other end of the rotating support arm is threadedly connected to a fixed sleeve, which is slidably disposed inside the rotating sleeve. The fixed sleeve is provided with an abutting part for abutting against the end of the rotating sleeve.

[0012] The valve body has a positioning groove on its inner wall, and the vacuum sealing ring is located in the positioning groove.

[0013] The valve body includes a first part and a second part, which are detachably connected by a locking member, and the positioning groove is provided on the first part and the second part.

[0014] The vacuum sealing ring is provided with an air port that communicates with the suction channel. The air port is located in the valve body and is connected to an air connector.

[0015] The rotating support arm and the air port are located at opposite ends of the vacuum sealing ring.

[0016] Compared with the prior art, the advantages of this utility model are:

[0017] The butterfly valve disclosed in this utility model uses a rotating support arm to drive the valve plate to rotate within the valve body, thereby opening or closing the butterfly valve. When the butterfly valve is closed, the valve plate rotates to a horizontal position, drawing air into the vacuum sealing ring through the suction channel. At this time, the material begins to adhere to the filter screen on the inner wall of the vacuum sealing ring until the gap between the valve plate and the vacuum sealing ring is completely filled, achieving self-sealing. This self-sealing does not require the addition of extra materials. When the butterfly valve is opened, the vacuum is broken, and the self-sealing is automatically released. The structure is simple, and the gap between the valve plate and the vacuum sealing ring prevents friction between the valve plate and the vacuum sealing ring during rotation, reducing the generation of insoluble particles and improving product quality. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the butterfly valve of this utility model.

[0019] Figure 2 This is a cross-sectional structural diagram of the butterfly valve of this utility model.

[0020] Figure 3 yes Figure 2 A magnified structural diagram of point A in the middle.

[0021] Figure 4 This is a top view cross-sectional structural diagram of the butterfly valve of this utility model.

[0022] Figure 5This is a three-dimensional structural diagram of the vacuum sealing ring in this utility model.

[0023] Figure 6 This is a schematic diagram of the application scenario of the butterfly valve of this utility model.

[0024] The labels in the diagram represent: 1. Valve body; 11. First part; 12. Second part; 13. Locking element; 2. Valve plate; 3. Vacuum sealing ring; 31. Filter screen; 32. Suction channel; 33. Air port; 4. Rotary support arm; 5. Air connector; 6. Positioning sleeve; 61. Elastic positioning element; 7. Rotating sleeve; 71. Positioning groove; 8. Connecting element; 9. Fixing sleeve; 91. Abutment part; 10. Gap. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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.

[0027] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" 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 communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Figures 1 to 6An embodiment of the butterfly valve of this utility model is shown. The butterfly valve of this embodiment includes a valve body 1, a valve plate 2, and a vacuum sealing ring 3. The vacuum sealing ring 3 is disposed inside the valve body 1. The inner wall of the vacuum sealing ring 3 is provided with a filter screen 31 for ventilation and dust prevention. The vacuum sealing ring 3 is provided with a suction channel 32 communicating with the filter screen 31. The valve plate 2 is located inside the vacuum sealing ring 3, and a gap 10 is left between the valve plate 2 and the vacuum sealing ring 3. The valve body 1 is rotatably connected to a rotating support arm 4, which passes through the valve body 1 and the vacuum sealing ring 3 and is connected to the valve plate 2.

[0030] This butterfly valve opens or closes by rotating the support arm 4 to drive the valve plate 2 to rotate within the valve body 1. When the butterfly valve is closed, the valve plate 2 rotates to a horizontal position, drawing air into the vacuum sealing ring 3 through the suction channel 32. At this time, the material begins to adhere to the filter screen 31 on the inner wall of the vacuum sealing ring 3 until the gap 10 between the valve plate 2 and the vacuum sealing ring 3 is completely filled, thus achieving self-sealing. This self-sealing does not require the addition of extra materials. When the butterfly valve is opened, the vacuum is broken, and the self-sealing is automatically released. The structure is simple, and the gap 10 between the valve plate 2 and the vacuum sealing ring 3 prevents friction between the valve plate 2 and the vacuum sealing ring 3 during rotation, reducing the generation of insoluble particles and improving product quality.

[0031] Furthermore, such as Figure 2 As shown, in this embodiment, the valve body 1 is provided with a positioning sleeve 6, and the rotating support arm 4 passes through the positioning sleeve 6 and can rotate relative to the positioning sleeve 6. A rotating sleeve 7 is provided outside the rotating support arm 4, and one end of the rotating sleeve 7 abuts against the positioning sleeve 6. The abutting ends of the positioning sleeve 6 and the rotating sleeve 7 are respectively provided with mutually cooperating elastic positioning elements 61 and positioning grooves 71. By turning the rotating sleeve 7, the rotating support arm 4 is driven to rotate relative to the positioning sleeve 6. When the positioning groove 71 on the rotating sleeve 7 rotates to align with the elastic positioning element 61 of the positioning sleeve 6, the elastic positioning element 61 springs into the positioning groove 71, which can fix the angle of the valve plate 2 and adapt to specific scenarios.

[0032] Furthermore, such as Figure 2 As shown, in this embodiment, multiple positioning grooves 71 are provided, and these multiple positioning grooves 71 are arranged at intervals along the circumference of the rotating support arm 4. By controlling the rotation angle of the rotating sleeve 7, different positioning grooves 71 are aligned with the elastic positioning members 61, thereby changing the rotation angle of the valve plate 2 to adapt to the usage requirements of different scenarios. Of course, in other embodiments, multiple elastic positioning members 61 can also be provided.

[0033] Furthermore, such as Figure 2 As shown, in this embodiment, the mating surface between the elastic positioning member 61 and the positioning groove 71 is a spherical surface. This reduces friction and resistance during rotation and prevents jamming.

[0034] Furthermore, such as Figure 2As shown, in this embodiment, the rotating sleeve 7 is detachably connected to the rotating support arm 4 via the connector 8. This facilitates the assembly and disassembly of the rotating sleeve 7 and the rotating support arm 4.

[0035] Furthermore, such as Figure 2 As shown, in this embodiment, the other end of the rotating support arm 4 is threadedly connected to a fixing sleeve 9, which slides inside the rotating sleeve 7. The fixing sleeve 9 is provided with an abutment portion 91 for abutting against the end of the rotating sleeve 7. This facilitates the installation of the rotating sleeve 7.

[0036] Furthermore, such as Figure 1 and Figure 4 As shown in the figure, in this embodiment, the inner wall of the valve body 1 is provided with a positioning groove, and the vacuum sealing ring 3 is disposed in the positioning groove. The positioning groove (not shown in the figure) provides installation space for the vacuum sealing ring 3, preventing the vacuum sealing ring 3 from obstructing the passage of materials.

[0037] Furthermore, such as Figure 1 As shown, in this embodiment, the valve body 1 includes a first part 11 and a second part 12, which are detachably connected by a locking member 13. A positioning groove is provided on the first part 11 and the second part 12 to facilitate the assembly and disassembly of the vacuum sealing ring 3.

[0038] Furthermore, such as Figure 3 , Figure 4 and Figure 5 As shown, in this embodiment, the vacuum sealing ring 3 is provided with an air port 33 that communicates with the suction channel 32. The air port 33 is located inside the valve body 1 and is connected to an air connector 5. The air connector 5 facilitates connection to an external air extraction mechanism.

[0039] Furthermore, such as Figure 5 As shown, in this embodiment, the rotating support arm 4 and the air port 33 are located at opposite ends of the vacuum sealing ring 3. This makes the vacuuming and de-vacuuming within the vacuum sealing ring 3 more uniform, further improving the sealing performance.

[0040] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A butterfly valve, characterized in that: The valve includes a valve body (1), a valve plate (2), and a vacuum sealing ring (3). The vacuum sealing ring (3) is located inside the valve body (1). The inner wall of the vacuum sealing ring (3) is provided with a filter screen (31) for ventilation and dust blocking. The vacuum sealing ring (3) is provided with a suction channel (32) communicating with the filter screen (31). The valve plate (2) is located inside the vacuum sealing ring (3) and a gap (10) is left between it and the vacuum sealing ring (3). The valve body (1) is rotatably connected to a rotating support arm (4). The rotating support arm (4) passes through the valve body (1) and the vacuum sealing ring (3) and is connected to the valve plate (2).

2. The butterfly valve according to claim 1, characterized in that: The valve body (1) is provided with a positioning sleeve (6), the rotating support arm (4) passes through the positioning sleeve (6) and can rotate relative to the positioning sleeve (6), the rotating support arm (4) is provided with a rotating sleeve (7), one end of the rotating sleeve (7) abuts against the positioning sleeve (6), and the abutting ends of the positioning sleeve (6) and the rotating sleeve (7) are respectively provided with mutually cooperating elastic positioning elements (61) and positioning grooves (71).

3. The butterfly valve according to claim 2, characterized in that: The positioning groove (71) is provided in multiple ways, and the multiple positioning grooves (71) are arranged at intervals along the circumference of the rotating support arm (4).

4. The butterfly valve according to claim 2, characterized in that: The mating surface between the elastic positioning element (61) and the positioning groove (71) is a spherical surface.

5. The butterfly valve according to claim 2, characterized in that: The rotating sleeve (7) is detachably connected to the rotating support arm (4) via a connector (8).

6. The butterfly valve according to claim 2, characterized in that: The other end of the rotating support arm (4) is threadedly connected to a fixed sleeve (9), which is slidably disposed inside the rotating sleeve (7). The fixed sleeve (9) is provided with an abutment part (91) for abutting against the end of the rotating sleeve (7).

7. The butterfly valve according to any one of claims 1 to 6, characterized in that: The valve body (1) has a positioning groove on its inner wall, and the vacuum sealing ring (3) is located in the positioning groove.

8. The butterfly valve according to claim 7, characterized in that: The valve body (1) includes a first part (11) and a second part (12), which are detachably connected by a locking member (13). The positioning groove is provided on the first part (11) and the second part (12).

9. The butterfly valve according to any one of claims 1 to 6, characterized in that: The vacuum sealing ring (3) is provided with an air port (33) that communicates with the suction channel (32). The air port (33) is located inside the valve body (1) and is connected to an air connector (5).

10. The butterfly valve according to claim 9, characterized in that: The rotating support arm (4) and the air port (33) are located at opposite ends of the vacuum sealing ring (3).

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