A clamp-type butterfly valve

Abstract

A clamp-type butterfly valve includes a front flange, a rear flange, a valve seat, and a valve plate. The valve seat has a valve hole extending in the front-to-back direction and multiple mounting holes spaced circumferentially along the valve hole. The front flange and rear flange are respectively fitted to the front and rear sides of the valve seat. The mounting holes penetrate the valve seat in the front-to-back direction and are equipped with fastening bolts. The front end of the fastening bolt is detachably connected to the front flange, and the rear end is detachably connected to the rear flange. The front flange has an inlet hole communicating with the front end of the valve hole, and the rear flange has an outlet hole communicating with the rear end of the valve hole. A valve plate is installed in the valve hole, and the valve seat has a rotatable valve stem connected to the valve plate. The valve stem is used to drive the valve plate to rotate to control the opening and closing of the valve hole. This design facilitates the assembly of the valve plate, effectively reduces the probability of the valve plate colliding or scratching with the valve hole, affecting the sealing performance, and ensures the quality of the finished product.

Description

Technical Field

[0001] This utility model relates to the technical field of butterfly valves, and more specifically to a clamp-type butterfly valve. Background Technology

[0002] Butterfly valves, as compact and quick-opening valves, are widely used in various fluid pipeline systems for media shut-off or flow regulation due to their low flow resistance and low operating torque. A typical butterfly valve structure includes a valve body with a valve orifice and a circular valve plate rotatably mounted within the orifice via a valve stem. When switching is required, the valve stem rotates the valve plate; when the valve plate plane is parallel to the fluid direction, the valve orifice opens; when the valve plate plane is perpendicular to the fluid direction, the valve orifice closes.

[0003] In traditional butterfly valve structures, the valve plate needs to be moved into the valve body before being connected to the valve stem during production and assembly. However, due to the large planar dimensions of the valve plate, the operating space is relatively narrow when the valve plate is installed in the valve hole, resulting in inconvenience in assembly. If not handled carefully, the edge of the valve plate can easily bump or scratch against the inner wall of the valve hole, affecting the sealing performance. Utility Model Content

[0004] The purpose of this invention is to solve the problem that in the existing butterfly valve structure, the valve plate needs to be moved into the valve body before being connected to the valve stem during production and assembly. However, due to the large planar dimensions of the valve plate, the operating space is relatively narrow when the valve plate is installed in the valve hole, resulting in inconvenient assembly. If not handled carefully, the edge of the valve plate can easily bump or scratch against the inner wall of the valve hole, affecting the sealing performance.

[0005] To solve the above problems, this utility model provides a clamp-type butterfly valve, including a front flange, a rear flange, a valve seat, and a valve plate. The valve seat has a valve hole opened in the front-to-back direction and a plurality of mounting holes spaced circumferentially along the valve hole. The front flange and the rear flange are respectively fitted to the front and rear sides of the valve seat. The mounting holes penetrate the valve seat in the front-to-back direction and are provided with fastening bolts. The front end of the fastening bolt is detachably connected to the front flange and the rear end is detachably connected to the rear flange. The front flange has an inlet hole communicating with the front end of the valve hole, and the rear flange has an outlet hole communicating with the rear end of the valve hole. A valve plate is provided in the valve hole, and the valve seat has a rotatable valve stem connected to the valve plate. The valve stem is used to drive the valve plate to rotate to control the opening and closing of the valve hole.

[0006] The above-described design improves the butterfly valve structure by separating the conventional valve body into independent front flange, rear flange, and valve seat. During assembly, due to the short axial length of the valve hole inside the valve seat, the valve plate can be easily moved into the valve hole and assembled with the valve stem. Then, the front and rear flanges are assembled to the front and rear sides of the valve seat respectively using fasteners. The front flange's inlet and the rear flange's outlet extend the front and rear ends of the valve hole, forming a valve body structure that meets the requirements. Compared with existing technologies, this design achieves convenient assembly of the valve plate, effectively reducing the probability of the valve plate colliding or scratching with the valve hole, affecting sealing performance, and ensuring the quality of the finished product.

[0007] In an improved embodiment, the fastener is a bolt, the front flange has multiple front holes spaced apart circumferentially, and each front hole corresponds to a mounting hole; the rear flange has multiple rear holes spaced apart circumferentially, and each rear hole corresponds to a mounting hole; the front end of the fastener passes through the front hole and is provided with a nut located on the front side of the front flange, and the rear end of the fastener passes through the rear hole and is provided with a nut located on the rear side of the rear flange, thereby achieving a stable connection between the front flange and the rear flange and the valve seat through the bolt and nut.

[0008] In an improved embodiment, an elastic gasket is provided between the nut and the front flange, thereby preventing the nut and bolt from damaging the front and rear flanges.

[0009] In an improved embodiment, a sealing ring is provided between the front flange and the valve seat, surrounding the valve hole, and a sealing ring is provided between the rear flange and the valve seat, surrounding the valve hole, thereby improving the sealing performance between the front flange and the valve seat, and between the rear flange and the valve seat through the sealing rings.

[0010] In an improved embodiment, the number of mounting holes is at least four, thereby ensuring a stable connection between the front flange and the rear flange relative to the valve seat.

[0011] In an improved embodiment, the front flange is provided with a forward-extending air inlet pipe that is connected to an inlet hole; the rear flange is provided with a rearward-extending air outlet pipe that is connected to an outlet hole, thereby extending the inlet hole through the air inlet pipe and extending the outlet hole through the air outlet pipe, which facilitates assembly with pipelines. Attached Figure Description

[0012] Figure 1 This is a front view schematic diagram of a clamp-type butterfly valve;

[0013] Figure 2 This is a side view of a clamp-type butterfly valve;

[0014] Figure 3 This is a schematic diagram of a cross-section of a clamp-type butterfly valve;

[0015] Figure 4 In order to be in Figure 2 A partial sectional view based on the original.

[0016] Explanation of reference numerals in the attached figures.

[0017] 1. Front flange; 11. Inlet hole; 12. Front hole; 13. Air inlet pipe; 2. Rear flange; 21. Outlet hole; 22. Rear hole; 23. Air outlet pipe; 3. Valve seat; 31. Valve hole; 32. Assembly hole; 4. Valve plate; 41. Valve stem; 5. Fastening bolt; 51. Nut; 52. Nut; 53. Elastic gasket; 6. Sealing ring. Detailed Implementation

[0018] It should be understood by those skilled in the art that the following embodiments are merely illustrative of the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0019] In the following description of the embodiments, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0020] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0021] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] Please see Figures 1-4An embodiment of this utility model provides a clamp-type butterfly valve, including a front flange, a rear flange, a valve seat, and a valve plate. The valve seat has a valve hole opened in the front-to-back direction and a plurality of mounting holes spaced apart circumferentially along the valve hole. The front flange and the rear flange are respectively attached to the front and rear sides of the valve seat. The mounting holes penetrate the valve seat in the front-to-back direction and are provided with fastening bolts in the mounting holes. The front end of the fastening bolt is detachably connected to the front flange and the rear end is detachably connected to the rear flange. The front flange is provided with an inlet hole communicating with the front end of the valve hole, and the rear flange is provided with an outlet hole communicating with the rear end of the valve hole. A valve plate is provided in the valve hole, and the valve seat is provided with a rotatable valve stem connected to the valve plate. The valve stem is used to drive the valve plate to rotate in order to control the opening and closing of the valve hole.

[0023] The above-described design improves the butterfly valve structure by separating the conventional valve body into independent front flange, rear flange, and valve seat. During assembly, due to the short axial length of the valve hole inside the valve seat, the valve plate can be easily moved into the valve hole and assembled with the valve stem. Then, the front and rear flanges are assembled to the front and rear sides of the valve seat respectively using fasteners. The front flange's inlet and the rear flange's outlet extend the front and rear ends of the valve hole, forming a valve body structure that meets the requirements. Compared with existing technologies, this design achieves convenient assembly of the valve plate, effectively reducing the probability of the valve plate colliding or scratching with the valve hole, affecting sealing performance, and ensuring the quality of the finished product.

[0024] In this embodiment, the fastener is a bolt. The front flange has multiple front holes spaced apart circumferentially, and each front hole corresponds to a mounting hole. The rear flange has multiple rear holes spaced apart circumferentially, and each rear hole corresponds to a mounting hole. The front end of the fastener passes through the front hole and is provided with a nut located on the front side of the front flange. The rear end of the fastener passes through the rear hole and is provided with a nut located on the rear side of the rear flange. Thus, the front flange and the rear flange are stably connected to the valve seat by the bolt and the nut.

[0025] Furthermore, an elastic gasket is provided between the nut and the front flange to prevent the nut and bolt from damaging the front and rear flanges.

[0026] Of course, fasteners can also be in other forms as needed, such as rivets, as long as they can achieve the assembly of the front flange and the rear flange relative to the valve seat. This design does not limit this.

[0027] As an improvement to this embodiment, a sealing ring is provided between the front flange and the valve seat, and a sealing ring is provided between the rear flange and the valve seat, thereby improving the sealing performance between the front flange and the valve seat, and between the rear flange and the valve seat.

[0028] In this embodiment, there are at least four assembly holes to ensure a stable connection between the front flange and the rear flange relative to the valve seat.

[0029] As another improvement to this embodiment, the front flange is provided with an air inlet pipe extending forward and connected to the inlet hole; the rear flange is provided with an air outlet pipe extending backward and connected to the outlet hole, thereby extending the inlet hole through the air inlet pipe and extending the outlet hole through the air outlet pipe, which facilitates assembly with pipelines.

[0030] It should be noted that in the description of this application, the terms "inner" and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application. All directional indications (such as up, down, left, right, front, back, inner, and outer) are only used to explain the relative positional relationships and movement between components in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0031] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. 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 a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0032] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A clamp-type butterfly valve, characterized in that, The valve includes a front flange (1), a rear flange (2), a valve seat (3), and a valve plate (4). The valve seat (3) has a valve hole (31) opened in the front-rear direction and a plurality of mounting holes (32) circumferentially spaced along the valve hole (31). The front flange (1) and the rear flange (2) are respectively attached to the front and rear sides of the valve seat (3). The mounting holes (32) penetrate the valve seat (3) in the front-rear direction and are provided with fastening bolts (5). The front end of the fastening bolts (5) is detachable. The valve is connected to the front flange (1) and detachably connected to the rear flange (2). The front flange (1) has an inlet (11) that connects to the front end of the valve hole (31). The rear flange (2) has an outlet (21) that connects to the rear end of the valve hole (31). The valve hole (31) is provided with a valve plate (4). The valve seat (3) is provided with a rotatable valve stem (41) and the valve stem (41) is connected to the valve plate (4). The valve stem (41) is used to drive the valve plate (4) to rotate in order to control the opening and closing of the valve hole (31).

2. The clamp-type butterfly valve according to claim 1, characterized in that, The fastening bolt (5) is a bolt. The front flange (1) is provided with a plurality of front holes (12) spaced apart along the circumference, and the front holes (12) correspond one by one to the assembly holes (32). The rear flange (2) is provided with a plurality of rear holes (22) spaced apart along the circumference, and the rear holes (22) correspond one by one to the assembly holes (32). The front end of the fastening bolt (5) passes through the front hole (12) and is provided with a nut (51) located on the front side of the front flange (1). The rear end of the fastening bolt (5) passes through the rear hole (22) and is provided with a nut (52) located on the rear side of the rear flange (2).

3. The clamp-type butterfly valve according to claim 2, characterized in that, An elastic gasket (53) is provided between the nut (51) and the front flange (1).

4. The clamp-type butterfly valve according to any one of claims 1-3, characterized in that, A sealing ring (6) is provided between the front flange (1) and the valve seat (3) and surrounds the valve hole (31), and a sealing ring (6) is provided between the rear flange (2) and the valve seat (3) and surrounds the valve hole (31).

5. The clamp-type butterfly valve according to claim 1, characterized in that, The number of assembly holes (32) is at least four.

6. The clamp-type butterfly valve according to claim 1, characterized in that, The front flange (1) is provided with an air inlet pipe (13) extending forward, which is connected to the inlet hole (11); the rear flange (2) is provided with an air outlet pipe (23) extending backward, which is connected to the outlet hole (21).

Images