A cast pneumatic on-off butterfly valve

Abstract

The utility model discloses a cast formula pneumatic formula switch butterfly valve relates to technical field. The utility model discloses a valve body, set up in the valve plate of valve body flow channel, the valve rod is connected in the rotation of valve body, is used for driving the pneumatic actuating mechanism of valve plate rotation, still includes the sealing element for realizing the sealing between valve plate and valve body, the sealing element is split type rubber bushing, split type rubber bushing is by the left half rubber bushing and right half rubber bushing combination that set up along valve body flow channel center line symmetry, the annular installation groove for embedding left half rubber bushing and right half rubber bushing is equipped with in the valve body inner wall. The utility model discloses split type rubber bushing, has solved the problem that the existing integral type sealing rubber bushing must be disassembled and decomposed valve when replacing, leads to the problem of complicated maintenance.

Description

Technical Field

[0001] This utility model relates to the technical field, and in particular to a cast pneumatic switch butterfly valve. Background Technology

[0002] A butterfly valve is a commonly used pipeline fluid control valve that opens and closes by rotating a valve plate (butterfly plate). To ensure a tight seal, an elastic sealing ring (commonly known as a rubber sleeve) is usually installed on the valve plate or valve body.

[0003] In existing technologies, sealing sleeves are mostly integral ring structures installed in valve plates or valve body grooves. When the sleeves wear out or age due to long-term use and need to be replaced, the entire valve must be removed from the pipeline and the valve body disassembled in order to remove the old sleeve and install the new one. This process is cumbersome, time-consuming, and labor-intensive, requiring professional personnel to operate. Moreover, on process pipelines, disassembling valves may involve system shutdown and media venting, resulting in high maintenance costs, low efficiency, and disruption to continuous production. Summary of the Invention

[0004] The purpose of this utility model is to provide a cast pneumatic switch butterfly valve, which solves the problem of cumbersome maintenance caused by the need to disassemble and disassemble the valve when replacing the existing integral sealing sleeve by using a split rubber sleeve.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a cast pneumatic butterfly valve, comprising a valve body, a valve plate disposed within a flow channel of the valve body, a valve stem rotatably connected to the valve body, and a pneumatic actuator for driving the valve plate to rotate, and further comprising: A sealing element used to achieve a seal between the valve plate and the valve body. The sealing element is a split rubber sleeve, which is composed of a left half rubber sleeve and a right half rubber sleeve symmetrically arranged along the center line of the valve body flow channel. The inner wall of the valve body is provided with an annular mounting groove for embedding the left half rubber sleeve and the right half rubber sleeve.

[0006] As a preferred embodiment of this utility model, the mating surfaces of the left and right rubber sleeves are respectively provided with matching protrusions and grooves.

[0007] As a preferred technical solution of this utility model, the protrusion is provided with a first through hole, the right half of the rubber sleeve is provided with a second through hole that matches the first through hole, and a plurality of positioning bolts are threadedly connected to the valve body. The positioning bolts pass through the first through hole and the second through hole and are threadedly connected to the inner wall of the valve body.

[0008] As a preferred technical solution of this utility model, the annular mounting groove has annular snap-fit ​​grooves on the side walls on both sides along the fluid flow direction, the side walls on both sides of the left half of the rubber sleeve are fixedly connected with a first snap-fit ​​strip, and the side walls on both sides of the right half of the rubber sleeve are fixedly connected with a second snap-fit ​​strip.

[0009] As a preferred embodiment of this utility model, fastening bolts for pressing and fixing the left and right half rubber sleeves are provided at the edges on both sides along the fluid flow direction.

[0010] As a preferred technical solution of this utility model, the left half rubber sleeve and the right half rubber sleeve are respectively provided with a first arc-shaped notch and a second arc-shaped notch for the valve stem to pass through. The first arc-shaped notch and the second arc-shaped notch form a sealing hole, and the sealing hole fits against the outer wall of the valve stem.

[0011] As a preferred technical solution of this utility model, the above is described.

[0012] This utility model has the following beneficial effects: (i) By using a split rubber sleeve, this utility model eliminates the need to disassemble the valve body or remove the valve stem when the seal needs to be replaced. Simply remove and replace the left and right half rubber sleeves installed in the annular groove of the valve body. This reduces system downtime and maintenance workload, ensuring the continuity and efficiency of the production process.

[0013] (II) In this utility model, the split rubber sleeve ensures sealing reliability through a precise mating structure. The protrusions and grooves on the mating surfaces of the left and right rubber sleeves fit together, realizing automatic and precise alignment of the left and right rubber sleeves and effectively sealing the joint to prevent media leakage. At the same time, the positioning bolt passes through the through hole on the rubber sleeve and is threaded to the valve body, firmly fixing the rubber sleeve to the valve body to form a complete and stable sealing ring. This avoids misalignment or detachment of the seal under valve opening and closing or media pressure, and improves the overall sealing performance and service life.

[0014] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a cast pneumatic switch butterfly valve according to the present invention; Figure 2 This is a schematic diagram of the valve plate, valve stem, and split rubber sleeve of this utility model; Figure 3 This is a schematic diagram of the structure of the split-type rubber sleeve of this utility model; Figure 4 This is a schematic diagram of the structure of the left half of the rubber sleeve of this utility model; Figure 5 This is a schematic diagram of the right half of the rubber sleeve of this utility model; Figure 6 This is a schematic diagram of the internal structure of the valve body of this utility model.

[0017] The attached diagram lists the components represented by each number as follows: 1. Valve body; 2. Valve plate; 3. Valve stem; 4. Pneumatic actuator; 5. Split-type rubber sleeve; 6. Annular mounting groove; 7. Fastening bolt; 51. Left half rubber sleeve; 511. First snap-fit ​​strip; 512. First arc-shaped notch; 52. Right half rubber sleeve; 521. Second snap-fit ​​strip; 522. Second arc-shaped notch; 53. Protrusion; 54. Groove; 55. First through hole; 56. Second through hole; 57. Positioning bolt; 58. Sealing hole; 61. Annular snap-fit ​​groove. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] like Figures 1 to 6 As shown, a cast pneumatic butterfly valve includes a valve body 1, a valve plate 2 disposed within a flow channel of the valve body 1, a valve stem 3 rotatably connected within the valve body 1, and a pneumatic actuator 4 for driving the valve plate 2 to rotate. It also includes: The sealing element used to achieve the seal between the valve plate 2 and the valve body 1 is a split rubber sleeve 5. The split rubber sleeve 5 is composed of a left half rubber sleeve 51 and a right half rubber sleeve 52 symmetrically arranged along the center line of the flow channel of the valve body 1. The inner wall of the valve body 1 is provided with an annular mounting groove 6 for embedding the left half rubber sleeve 51 and the right half rubber sleeve 52.

[0021] The valve uses a pneumatic actuator 4 to drive the valve stem 3 to rotate the valve plate 2 to open and close the flow channel. When the seal needs to be replaced, there is no need to disassemble the valve body 1. The left and right half rubber sleeves 52 installed in the annular groove of the valve body 1 can be directly removed and replaced, which greatly simplifies the maintenance process, significantly reduces system downtime and maintenance costs, and ensures the continuity of production.

[0022] like Figures 1 to 5 As shown, the mating surfaces of the left half rubber sleeve 51 and the right half rubber sleeve 52 are respectively provided with matching protrusions 53 and grooves 54.

[0023] During installation, as the left half of the rubber sleeve 51 and the right half of the rubber sleeve 52 are joined along the mating surface, the protrusion 53 and the groove 54 on the mating surface will automatically engage with each other. This serves two purposes: firstly, it achieves precise alignment of the two half of the rubber sleeve, providing a pre-position for the smooth insertion of the subsequent positioning bolt 57; secondly, the interlocking of the protrusion 53 and the groove 54 effectively seals the mating gap between the two half of the rubber sleeve, preventing the medium from leaking from the joint and enhancing the sealing reliability of the split structure.

[0024] like Figures 1 to 5 As shown, a first through hole 55 is provided on the protrusion 53, and a second through hole 56 that matches the first through hole 55 is provided on the right half rubber sleeve 52. Several positioning bolts 57 are threadedly connected to the valve body 1. The positioning bolts 57 pass through the first through hole 55 and the second through hole 56 and are threadedly connected to the inner wall of the valve body 1.

[0025] During installation, the left half of the rubber sleeve 51 and the right half of the rubber sleeve 52 are inserted into the annular mounting groove 6 of the valve body 1 and aligned, so that the first through hole 55 on the protrusion 53 of the left half of the rubber sleeve 51 is precisely aligned with the second through hole 56 on the right half of the rubber sleeve 52. Then, the positioning bolts 57 are passed through these through holes in sequence and screwed into the threaded holes on the inner wall of the valve body 1 and tightened. The purpose of this operation is to firmly combine and position the two half of the rubber sleeve on the valve body 1 through mechanical connection, ensuring that they form a complete and stable sealing ring, preventing misalignment or detachment under valve opening and closing or medium pressure, and providing a basis for convenient replacement and maintenance without disassembling the valve body 1.

[0026] like Figures 1 to 6 As shown, the annular mounting groove 6 has annular snap-fit ​​grooves 61 on both sides of the sidewalls along the fluid flow direction. The sidewalls on both sides of the left half rubber sleeve 51 are fixedly connected with the first snap-fit ​​strip 511, and the sidewalls on both sides of the right half rubber sleeve 52 are fixedly connected with the second snap-fit ​​strip 521.

[0027] During installation, the left half rubber sleeve 51 and the right half rubber sleeve 52 are pushed into the annular mounting groove 6 along the center line of the flow channel of the valve body 1, so that the first snap-fit ​​strip 511 and the second snap-fit ​​strip 521 on their side walls are embedded into the annular snap-fit ​​grooves 61 on both sides of the mounting groove. The function is to provide a firm axial positioning for the split rubber sleeve 5 through the mechanical interlock between the snap-fit ​​strip and the snap-fit ​​groove. At the same time, the snap-fit ​​structure plays a role in pre-fixing and centering before final tightening, which simplifies the installation alignment process and improves the overall sealing reliability.

[0028] like Figures 1 to 5 As shown, fastening bolts 7 are provided at the edges of the left half rubber sleeve 51 and the right half rubber sleeve 52 along the fluid flow direction to clamp and fix them.

[0029] After the initial alignment and snap-fit ​​of the rubber sleeves are completed, special fastening bolts 7 are screwed into and tightened at the edges of the left half rubber sleeve 51 and the right half rubber sleeve 52 along the fluid flow direction. The purpose is to apply a uniform radial clamping force from the outside edge of the rubber sleeve to ensure that it fits tightly against the bottom surface and side wall of the annular mounting groove 6 of the valve body 1.

[0030] like Figures 1 to 5 As shown, the left half of the rubber sleeve 51 and the right half of the rubber sleeve 52 are respectively provided with a first arc-shaped notch 512 and a second arc-shaped notch 522 for the valve stem 3 to pass through. The first arc-shaped notch 512 and the second arc-shaped notch 522 form a sealing hole 58, and the sealing hole 58 is in contact with the outer wall of the valve stem 3.

[0031] When the left half of the rubber sleeve 51 and the right half of the rubber sleeve 52 are assembled inside the valve body 1, the first arc-shaped notch 512 and the second arc-shaped notch 522 on both are precisely aligned, forming a complete sealing hole 58 that fits tightly against the outer contour of the valve stem 3. This creates a continuous, uninterrupted elastic sealing ring in the critical area through which the valve stem 3 passes, effectively preventing media leakage outwards along the valve stem 3 axis and achieving dynamic sealing at the valve stem 3. Simultaneously, this split notch design eliminates the need to insert the sealing hole 58 from the end of the valve stem 3, adapting to the lateral assembly method of the split rubber sleeves and ensuring that maintenance and replacement of critical sealing components can still be achieved without disassembling the valve stem 3 and the valve body 1.

[0032] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A cast pneumatic switch butterfly valve, comprising a valve body (1), a valve plate (2) disposed in a flow channel of the valve body (1), a valve stem (3) rotatably connected to the valve body (1), and a pneumatic actuator (4) for driving the valve plate (2) to rotate, characterized in that, Also includes: A sealing element for sealing between valve plate (2) and valve body (1), the sealing element is a split rubber sleeve (5), the split rubber sleeve (5) is composed of a left half rubber sleeve (51) and a right half rubber sleeve (52) symmetrically arranged along the center line of the flow channel of valve body (1), and the inner wall of valve body (1) is provided with an annular mounting groove (6) for embedding the left half rubber sleeve (51) and the right half rubber sleeve (52).

2. The cast pneumatic switch butterfly valve according to claim 1, characterized in that, The mating surfaces of the left half rubber sleeve (51) and the right half rubber sleeve (52) are respectively provided with matching protrusions (53) and grooves (54).

3. A cast pneumatic switch butterfly valve according to claim 2, characterized in that, The protrusion (53) has a first through hole (55), and the right half rubber sleeve (52) has a second through hole (56) that matches the first through hole (55). The valve body (1) is internally threaded with several positioning bolts (57). The positioning bolts (57) pass through the first through hole (55) and the second through hole (56) and are threaded to the inner wall of the valve body (1).

4. A cast pneumatic switch butterfly valve according to claim 1 or 2, characterized in that, The annular mounting groove (6) has an annular snap-fit ​​groove (61) on the side walls on both sides along the fluid flow direction. The side walls on both sides of the left half rubber sleeve (51) are fixedly connected with a first snap-fit ​​strip (511), and the side walls on both sides of the right half rubber sleeve (52) are fixedly connected with a second snap-fit ​​strip (521).

5. A cast pneumatic switch butterfly valve according to claim 1 or 2, characterized in that, The left half rubber sleeve (51) and the right half rubber sleeve (52) are provided with fastening bolts (7) at the edges on both sides along the fluid flow direction for pressing and fixing them.

6. A cast pneumatic switch butterfly valve according to claim 1, characterized in that, The left half rubber sleeve (51) and the right half rubber sleeve (52) are respectively provided with a first arc-shaped notch (512) and a second arc-shaped notch (522) for the valve stem (3) to pass through. The first arc-shaped notch (512) and the second arc-shaped notch (522) form a sealing hole (58), and the sealing hole (58) is in contact with the outer wall of the valve stem (3).

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