Eccentric butterfly valve convenient to disassemble

Abstract

The utility model belongs to the eccentric butterfly valve field of convenient dismounting, disclose a kind of eccentric butterfly valve of convenient dismounting, including eccentric butterfly valve body, rotating rod is rotatably connected in eccentric butterfly valve body middle section inner wall, fixed bottom plate is equipped on the outer wall of rotating rod, the fixed mounting of fixed bottom plate top is connected top plate, and the connecting sleeve of connected top plate top is provided with;By adopting modular assembly structure design, rotating rod and fixed bottom plate, connecting top plate form combined support unit, simultaneously make end cover through bolt and communicating sleeve detachable connection, and end cover integrates through cylinder, communicating side cylinder and other transmission operating assembly, reach without disassembling valve body and the effect that pipeline integral connection can be taken down transmission assembly step by step, expose internal core component, greatly simplify the overhaul replacement process of valve plate, rotating rod and other vulnerable components, reduce maintenance manpower and time cost, simultaneously avoid the damage of integral disassembly to valve body and pipeline connection structure.

Description

Technical Field

[0001] This utility model relates to the technical field of eccentric butterfly valves that are easy to disassemble and assemble, specifically an eccentric butterfly valve that is easy to disassemble and assemble. Background Technology

[0002] In fluid transport systems, butterfly valves, as a commonly used flow-stopping and regulating device, are widely used in various industrial scenarios due to their compact structure and convenient operation. Among them, eccentric butterfly valves, with their eccentric valve plate design, have significant advantages in sealing performance and flow efficiency, further expanding their application range.

[0003] However, in practical applications, the ease of disassembly and assembly of existing eccentric butterfly valves often fails to meet actual needs. Traditional eccentric butterfly valves typically use integrated or multi-part welded connections with complex bolt sets for internal transmission components and valve bodies. When repairing, maintaining, or replacing core components such as the internal valve plate and rotating mechanism, the entire valve body often needs to be disassembled. This not only consumes significant manpower and time but also risks damaging the valve body and components due to improper handling during disassembly and assembly, affecting the stability of subsequent use. Under long-term on / off operation and fluid impact, problems such as component loosening and accelerated wear are prone to occur. Furthermore, the inconvenience of disassembly and assembly makes the replacement and maintenance of faulty components more cumbersome, further reducing the overall operating efficiency and service life of the equipment. Therefore, to address the problems of inconvenient disassembly and assembly and low maintenance efficiency of existing eccentric butterfly valves, it is urgent to design an eccentric butterfly valve structure that facilitates disassembly and assembly, optimizing the disassembly and assembly process and improving maintenance convenience. Utility Model Content

[0004] This invention provides an eccentric butterfly valve that is easy to assemble and disassemble, aiming to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an eccentric butterfly valve that is easy to assemble and disassemble, comprising an eccentric butterfly valve body, a rotating rod rotatably connected to the inner wall of the middle section of the eccentric butterfly valve body, a fixed base plate sleeved on the outer wall of the rotating rod, a connecting top plate fixedly installed on the top of the fixed base plate, a connecting sleeve provided on the top of the connecting top plate, a communicating sleeve fixedly installed on the top of the connecting sleeve, an end cap fixedly installed on the top of the communicating sleeve by bolts, a through cylinder fixedly installed on the inner wall of the top of the end cap, a communicating side cylinder communicatingly provided on the outer wall of the end cap, a rotating shaft rotatably connected to the inner wall of the communicating side cylinder, a handwheel fixedly installed on one end of the front of the rotating shaft, and a valve plate fixedly installed on the outer wall of the lower section of the rotating rod.

[0006] As a preferred technical solution of this application, the eccentric butterfly valve body is fixedly installed with connecting flanges at the front and rear ends; the connecting flanges fixedly installed at the front and rear ends of the eccentric butterfly valve body achieve precise docking with the fluid conveying pipeline system. The structural design of the connecting flanges ensures the sealing connection and stable fixation between the valve body and the pipeline, providing basic support for the stable operation of the valve in the future.

[0007] As a preferred technical solution of this application, the fixed base plate and the connecting top plate are fixedly installed by bolts, and the rotating rod is sleeved on the inner wall of the fixed base plate and the connecting top plate; the core transmission component of the device, the rotating rod, is rotatably connected to the inner wall of the eccentric butterfly valve body through the middle section, so as to achieve stable vertical arrangement; in order to improve the rotational stability of the rotating rod, the fixed base plate and the connecting top plate sleeved on its outer wall are fixed by bolts to form a combined support structure, and the rotating rod passes through and is sleeved on the inner wall of the support structure, forming a radial limit on the middle section of the rotating rod.

[0008] As a preferred technical solution of this application, the top of the rotating rod is rotatably connected to the end cover and the inner wall of the tube; the bottom outer wall of the rotating rod is rotatably connected to the end cover and the inner wall of the tube, and the lower bearing sleeve fitted on the bottom outer wall cooperates with the bottom structure of the valve body to form a three-point support system of "top-middle-bottom", which greatly reduces the radial runout of the rotating rod during the rotation process and provides a guarantee for transmission accuracy.

[0009] As a preferred technical solution of this application, the rotating shaft is connected to the outer wall of the rotating rod; when it is necessary to cut off the flow of fluid or adjust the flow rate, the operator inputs operating force by rotating the handwheel at the outer end of the connecting side cylinder, and the handwheel drives the rotating shaft fixedly connected to it to rotate on the inner wall of the connecting side cylinder.

[0010] As a preferred technical solution of this application, a lower bearing sleeve is provided on the outer wall of the bottom of the rotating rod; the valve plate fixedly installed on the outer wall of the lower section of the rotating rod rotates synchronously with the rotating rod, and the valve plate is sleeved in the inner cavity of the eccentric butterfly valve body and adopts an eccentric design, which can achieve precise contact or separation with the sealing surface inside the valve body during rotation: when the valve plate rotates to be perpendicular to the fluid flow direction, its eccentric structure forms a tight seal to achieve fluid interception.

[0011] As a preferred technical solution of this application, the valve plate is sleeved in the inner cavity of the eccentric butterfly valve body, and reinforcing rings are fixedly installed on the inner walls of both ends of the eccentric butterfly valve body; remove the fixing bolts between the end cover and the connecting sleeve, and remove the end cover together with the top tube and the side connecting tube, rotating shaft, handwheel and other transmission operation components to expose the top structure of the rotating rod; if it is necessary to repair the middle section support structure of the rotating rod, the fixing bolts between the fixed bottom plate and the connecting top plate can be removed, and the middle section of the rotating rod can be maintained after separating the two parts.

[0012] (1) This utility model improves the ease of disassembly and maintenance. By adopting a modular assembly structure design, the rotating rod, fixed base plate, and connecting top plate form a combined support unit. At the same time, the end cover is detachably connected to the connecting sleeve by bolts. The end cover integrates transmission operation components such as the through cylinder and the connecting side cylinder. This achieves the effect of removing the transmission components and exposing the internal core components step by step without disassembling the valve body and the overall connection of the pipeline. This greatly simplifies the inspection and replacement process of vulnerable parts such as valve plate and rotating rod, reduces maintenance manpower and time costs, and avoids damage to the valve body and pipeline connection structure caused by overall disassembly.

[0013] (2) The stability and adjustment accuracy of this product are guaranteed by constructing a three-point rotating rod support system consisting of "end cover - top limit of the cylinder, fixed base plate - middle support of the connecting top plate, and bottom friction reduction of the lower bearing sleeve". With the precise transmission connection between the rotating shaft and the rotating rod, and with the help of the matching structure of the valve plate and the valve body sealing surface of the eccentric design, as well as the structural reinforcement effect of the reinforcing rings at both ends of the eccentric butterfly valve body, the radial runout of the rotating rod is effectively reduced, the transmission accuracy is improved, and the sealing and adjustment reliability of the valve plate are ensured. At the same time, the valve body's resistance to fluid impact deformation is enhanced, and the overall service life of the valve is extended. Attached Figure Description Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the inclined structure of this utility model; Figure 3 This is a schematic diagram of the oblique sectional structure of this utility model; Figure 4 This is a partial structural diagram of the rotating rod in this utility model.

[0014] In the diagram: 1. Eccentric butterfly valve body; 2. Connecting flange; 3. Rotating rod; 4. Fixed base plate; 5. Connecting top plate; 6. Connecting sleeve; 7. Connecting sleeve; 8. End cover; 9. Through sleeve; 10. Connecting side sleeve; 11. Rotating shaft; 12. Handwheel; 13. Reinforcing ring; 14. Lower bearing sleeve; 15. Valve plate. Detailed Implementation

[0015] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figure 1-4As shown, this utility model provides an eccentric butterfly valve that is easy to assemble and disassemble, including an eccentric butterfly valve body 1. A rotating rod 3 is rotatably connected to the inner wall of the middle section of the eccentric butterfly valve body 1. A fixed base plate 4 is sleeved on the outer wall of the rotating rod 3. A connecting top plate 5 is fixedly installed on the top of the fixed base plate 4. A connecting sleeve 6 is provided on the top of the connecting top plate 5. A communicating sleeve 7 is fixedly installed on the top of the connecting sleeve 6. An end cap 8 is fixedly installed on the top of the communicating sleeve 7 by bolts. A through cylinder 9 is fixedly installed on the inner wall of the top of the end cap 8. A communicating side cylinder 10 is provided on the outer wall of the end cap 8. A rotating shaft 11 is rotatably connected to the inner wall of the communicating side cylinder 10. A handwheel 12 is fixedly installed at one end of the front of the rotating shaft 11, and a valve plate 15 is fixedly installed on the outer wall of the lower section of the rotating rod 3; a connecting flange 2 is fixedly installed at the front and rear ends of the eccentric butterfly valve body 1; the fixed base plate 4 and the connecting top plate 5 are fixedly installed by bolts, and the rotating rod 3 is sleeved on the inner wall of the fixed base plate 4 and the connecting top plate 5; the top of the rotating rod 3 is rotatably connected to the inner wall of the end cover 8 and the through cylinder 9; the rotating shaft 11 is drively connected to the outer wall of the rotating rod 3; a lower bearing sleeve 14 is sleeved on the outer wall of the bottom of the rotating rod 3; the valve plate 15 is sleeved in the inner cavity of the eccentric butterfly valve body 1, and reinforcing rings 13 are fixedly installed on the inner walls of both ends of the eccentric butterfly valve body 1.

[0017] Working principle: Before the device is put into use, it is first precisely connected to the fluid conveying pipeline system through the connecting flanges 2 fixedly installed at the front and rear ends of the eccentric butterfly valve body 1. The structural design of the connecting flanges 2 ensures the sealing connection and stable fixation between the valve body and the pipeline, providing basic support for the stable operation of the valve. At the same time, the reinforcing rings 13 fixedly installed on the inner walls of both ends of the eccentric butterfly valve body 1 can enhance the structural strength of both ends of the valve body, avoid valve body deformation under pipeline pressure and fluid impact, and further ensure the structural stability after the overall installation. The core transmission component of the device, the rotating rod 3, is rotatably connected to the inner wall of the eccentric butterfly valve body 1 at its middle section, achieving a stable vertical arrangement. To improve the rotational stability of the rotating rod 3, the fixed bottom plate 4 and the connecting top plate 5, which are fitted on its outer wall, are fixed together with bolts to form a combined support structure. The rotating rod 3 passes through and is fitted onto the inner wall of this support structure, forming a radial limit on the middle section of the rotating rod 3. At the same time, the top of the rotating rod 3 is rotatably connected to the inner wall of the end cover 8 and the through cylinder 9, and the lower bearing sleeve 14 fitted on the bottom outer wall cooperates with the bottom structure of the valve body to form a three-point support system of "top-middle-bottom", which greatly reduces the radial runout of the rotating rod 3 during rotation and provides a guarantee for transmission accuracy. The end cover 8 is fixedly installed on the top of the connecting sleeve 7 with bolts, and the connecting sleeve 7 is fixedly connected to the connecting sleeve 6 on the top of the connecting top plate 5, forming a closed protective structure on the upper part of the transmission mechanism. When fluid needs to be blocked or its flow rate adjusted, the operator inputs operating force by rotating the handwheel 12 at the outer end of the connecting side cylinder 10. The handwheel 12 drives the rotating shaft 11, which is fixedly connected to it, to rotate on the inner wall of the connecting side cylinder 10. Since the rotating shaft 11 is connected to the outer wall of the rotating rod 3, the rotational motion of the rotating shaft 11 is converted into the vertical axial rotational motion of the rotating rod 3 through the transmission structure. The valve plate 15, which is fixedly installed on the outer wall of the lower section of the rotating rod 3, rotates synchronously with the rotating rod 3. The valve plate 15 is sleeved in the inner cavity of the eccentric butterfly valve body 1 and adopts an eccentric design. During rotation, it can achieve precise contact or separation with the sealing surface inside the valve body: when the valve plate 15 rotates to be perpendicular to the fluid flow direction, its eccentric structure forms a tight seal, realizing fluid blocking; when the valve plate 15 rotates to be parallel to the fluid flow direction, the fluid can pass smoothly through the valve body; by controlling the rotation angle of the handwheel 12, the rotation angle of the valve plate 15 can be adjusted, thereby achieving precise adjustment of the fluid flow rate. When it is necessary to inspect or replace the internal components of the device, thanks to the modular assembly design, convenient maintenance can be achieved through step-by-step disassembly. First, remove the fixing bolts between the end cover 8 and the connecting sleeve 7, and remove the end cover 8 together with the top tube 9 and the side connecting tube 10, rotating shaft 11, handwheel 12 and other transmission and operation components to expose the top structure of the rotating rod 3. If it is necessary to inspect the middle section support structure of the rotating rod 3, the fixing bolts between the fixed base plate 4 and the connecting top plate 5 can be removed. After separating the two parts, the middle section of the rotating rod 3 can be maintained. If it is necessary to replace the valve plate 15 or the lower bearing sleeve 14, the lower section of the rotating rod 3 can be exposed through the above disassembly steps for operation. It is not necessary to disassemble the connection between the entire eccentric butterfly valve body 1 and the pipeline, which greatly simplifies the maintenance process, reduces manpower and time costs, and avoids damage to the valve body and pipeline connection structure caused by overall disassembly. During long-term operation, the combined support structure of the fixed base plate 4 and the connecting top plate 5 can effectively disperse the radial force on the rotating rod 3, while the lower bearing sleeve 14 reduces the rotational friction at the bottom of the rotating rod 3. Together with the limiting effect of the top end cover 8 and the through cylinder 9, the stability of the rotating rod 3 in long-term rotation is ensured. At the same time, the reinforcing ring 13 strengthens the structure at both ends of the eccentric butterfly valve body 1, which can resist the deformation of the valve body caused by fluid impact. The modular sealing design ensures the sealing of each connection part and avoids fluid leakage, thus comprehensively ensuring the long-term stable operation of the device.

[0018] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An eccentric butterfly valve that is easy to assemble and disassemble, comprising an eccentric butterfly valve body (1), characterized in that: The inner wall of the middle section of the eccentric butterfly valve body (1) is rotatably connected to a rotating rod (3). A fixed base plate (4) is sleeved on the outer wall of the rotating rod (3). A connecting top plate (5) is fixedly installed on the top of the fixed base plate (4). A connecting sleeve (6) is provided on the top of the connecting top plate (5). A connecting sleeve (7) is fixedly installed on the top of the connecting sleeve (6). An end cap (8) is fixedly installed on the top of the connecting sleeve (7) by bolts. A through cylinder (9) is fixedly installed on the inner wall of the top of the end cap (8). A connecting side cylinder (10) is connected to the outer wall of the end cap (8). A rotating shaft (11) is rotatably connected to the inner wall of the connecting side cylinder (10). A handwheel (12) is fixedly installed on one end of the front of the rotating shaft (11). A valve plate (15) is fixedly installed on the outer wall of the lower section of the rotating rod (3).

2. The eccentric butterfly valve for easy assembly and disassembly according to claim 1, characterized in that: The eccentric butterfly valve body (1) has connecting flanges (2) fixedly installed at its front and rear ends.

3. The eccentric butterfly valve for easy disassembly and assembly according to claim 1, characterized in that: The fixed base plate (4) and the connecting top plate (5) are fixedly installed by bolts, and the rotating rod (3) is sleeved on the inner wall of the fixed base plate (4) and the connecting top plate (5).

4. The eccentric butterfly valve for easy assembly and disassembly according to claim 1, characterized in that: The top of the rotating rod (3) is rotatably connected to the end cap (8) and the inner wall of the tube (9).

5. The eccentric butterfly valve for easy assembly and disassembly according to claim 1, characterized in that: The rotating shaft (11) is connected to the outer wall of the rotating rod (3) for transmission.

6. The eccentric butterfly valve for easy assembly and disassembly according to claim 1, characterized in that: The bottom outer wall of the rotating rod (3) is fitted with a lower bearing sleeve (14).

7. The eccentric butterfly valve for easy disassembly and assembly according to claim 1, characterized in that: The valve plate (15) is sleeved in the inner cavity of the eccentric butterfly valve body (1), and reinforcing rings (13) are fixedly installed on the inner walls of both ends of the eccentric butterfly valve body (1).

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