Multi-stage regulating butterfly valve
Patent Information
- Application Number
- CN202522490752.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-24
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-24
AI Technical Summary
Existing butterfly valves are difficult to adjust for small flow rates at small openings, resulting in increased system resistance, a sharp increase in fluid velocity, substandard noise levels, and excessive opening and closing torque under high pressure conditions.
A multi-stage regulating butterfly valve is designed. Through the nesting and matching of large and small butterfly plate assemblies and the tightening of connecting screws, the large and small flow rates can be independently adjusted. Combined with the matching assembly of the upper and lower valve shafts and the base, the sealing performance and stability are ensured.
It enables multi-stage adjustment of large and small flow rates without reducing the diameter, reduces system resistance, avoids a sharp increase in fluid velocity, ensures that the noise level meets the standard, and improves the stability of the opening and closing torque and the reliability of the adjustment.
Smart Images
Figure CN224932180U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of multi-stage regulation technology, specifically a multi-stage regulating butterfly valve. Background Technology
[0002] Butterfly valves have always had a major drawback in terms of regulation: they cannot regulate the flow rate of the medium in the pipeline at small openings (opening < 15°~20°), meaning they are difficult to regulate small flow rates. In the same pipeline system, in addition to large flow rate regulation, there is sometimes a need for small flow rate regulation. In this case, a small flow rate valve needs to be installed. However, to install this small flow rate valve, the diameter of the pipeline needs to be reduced locally, which will adversely affect the large flow rate regulation conditions, such as increased system resistance, a sharp increase in fluid velocity leading to substandard noise levels, etc. At the same time, due to the structural characteristics of the butterfly valve disc itself, the opening and closing torque of the butterfly valve is relatively large under high pressure conditions.
[0003] In the same pipeline system, in addition to large flow regulation, there is sometimes a need for small flow regulation. In this case, a small flow valve needs to be installed. To install this small flow valve, the diameter of the pipeline needs to be reduced locally, which will have an adverse effect on the large flow regulation condition, namely, the system resistance will increase, the fluid velocity will increase sharply, and the noise level will not meet the standards. Utility Model Content
[0004] The purpose of this utility model is to provide a multi-stage regulating butterfly valve to solve the problem mentioned in the background art that, in addition to large flow regulation, there is sometimes a need for small flow regulation in the same pipeline system. In this case, a small flow valve needs to be installed. In order to install this small flow valve, the diameter of the pipeline needs to be reduced locally, which will have an adverse effect on the large flow regulation condition, that is, the system resistance will increase, the fluid velocity will increase sharply, and the noise level will not meet the standard.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage regulating butterfly valve, comprising a valve body, characterized in that: a large butterfly plate assembly is provided on the inner side of the valve body, a connecting screw is fixedly connected to the side of the large butterfly plate assembly, a small butterfly plate assembly is provided on the inner side of the large butterfly plate assembly, a connecting column is fixedly connected to the bottom of the valve body, a lower valve shaft base is fixedly connected to the bottom of the connecting column, a lower valve shaft is provided on the inner side of the lower valve shaft base, an upper valve shaft base is fixedly connected to the upper end of the connecting column, an upper valve shaft hole is opened on the top surface of the upper valve shaft base, an upper valve shaft is provided on the inner side of the upper valve shaft base, an upper valve shaft disc is fixedly connected to the bottom surface of the upper valve shaft, a fixing screw hole is opened on the top surface of the upper valve shaft disc, a fixing column is fixedly connected to the inner side of the fixing screw hole, and a fixing screw is spirally connected to the surface of the fixing column.
[0006] Preferably, the large butterfly plate assembly is integrally embedded in the middle section of the valve cavity inside the valve body. An assembly gap is reserved between the outer peripheral edge of the large butterfly plate assembly and the inner sidewall of the valve body. The large butterfly plate assembly is rotatably connected to the shaft holes corresponding to the upper and lower ends of the short shafts extending from its upper and lower ends and the corresponding shaft holes on the inner side of the valve body. The central axis of the large butterfly plate assembly coincides with the central axis of the valve body.
[0007] Preferably, the connecting screws are evenly distributed along the circumference of the large butterfly plate assembly, and their threaded ends form a threaded fastening connection with the pressure ring inside the large butterfly plate assembly to tightly fit the butterfly plate of the large butterfly plate assembly with the pressure ring, thereby clamping the sealing ring between the two. The small butterfly plate assembly is embedded in the mounting cavity inside the large butterfly plate assembly, and the small butterfly plate assembly and the large butterfly plate assembly are independent rotating structures, respectively corresponding to the small flow rate adjustment and large flow rate adjustment functions. The small butterfly plate assembly is equipped with a special fixing screw adapted to its own size for the fitting and fixing of its internal components.
[0008] Preferably, a connecting column is fixedly connected to the bottom of the valve body, and a lower valve shaft base is fixedly connected to the bottom of the connecting column. A lower valve shaft is provided on the inner side of the lower valve shaft base, and the lower valve shaft and the lower valve shaft base are a mating assembly structure.
[0009] Preferably, the upper end of the connecting column is fixedly connected to an upper valve shaft base, the top surface of the upper valve shaft base is provided with an upper valve shaft hole, the inner side of the upper valve shaft base is provided with an upper valve shaft, the bottom surface of the upper valve shaft is fixedly connected to an upper valve shaft disc, and the upper valve shaft passes through the upper valve shaft hole and is assembled with the upper valve shaft base.
[0010] Preferably, the top surface of the upper valve shaft disc is provided with a fixing screw hole, a fixing post is fixedly connected to the inner side of the fixing screw hole, a fixing screw is screwed to the surface of the fixing post, and the fixing screw fixes the fixing post in the fixing screw hole through screw engagement.
[0011] Compared with the prior art, the beneficial effects of this utility model are: This multi-stage regulating butterfly valve, in daily use, firstly uses the valve body as the overall mounting base. The large butterfly plate assembly is integrally embedded in the middle section of the valve cavity inside the valve body, with a pre-reserved assembly gap between its outer periphery and the inner wall of the valve body. A rotating fit is formed between the short shafts extending from the upper and lower ends and the corresponding shaft holes inside the valve body, with the central axis coinciding with the valve body, achieving large flow regulation. Connecting screws are evenly distributed around the circumference of the large butterfly plate assembly, vertically mounted in the flange holes on its side without penetrating, and the threaded ends are tightened with the internal pressure ring of the large butterfly plate assembly, tightly fitting the butterfly plate and the pressure ring to clamp the sealing ring between them, ensuring the sealing performance of the large butterfly plate assembly. The small butterfly plate assembly is embedded in the large butterfly plate assembly. The valve body is installed inside the cavity, and its outer periphery fits tightly against the inner wall of the large butterfly plate assembly. It is secured with dedicated fixing screws that match its dimensions, and it has an independent rotating structure from the large butterfly plate assembly, enabling small flow rate regulation. The bottom of the valve body is fixed to the lower valve shaft base via a connecting post. The lower valve shaft and the lower valve shaft base are fitted together. The upper valve shaft base is fixed to the upper end of the connecting post, and the upper valve shaft passes through the upper valve shaft hole on the top surface of the upper valve shaft base. The upper valve shaft disc on its bottom surface is fixed by a screw thread, fixing post, and fixing screw. The upper and lower valve shafts provide independent rotation drives for the small and large butterfly plate assemblies, respectively, allowing them to independently achieve small and large flow rate regulation. This multi-stage regulating butterfly valve can directly achieve multi-stage regulation of large and small flow rates through the nested cooperation of the large and small butterfly plate assemblies, effectively reducing system resistance, preventing a sharp increase in fluid velocity, ensuring noise level compliance, and ensuring stable and reliable regulation during the adjustment process by cooperating with the upper and lower valve shafts and bases and various fixing structures. Attached Figure Description
[0012] Figure 1 This is an axonometric view of the present invention; Figure 2 This is the front view of the present invention; Figure 3 This is a view of the present invention. Figure 4 This is a cross-sectional view of the present invention.
[0013] In the diagram: 1. Valve body; 2. Large butterfly plate assembly; 3. Connecting screw; 4. Small butterfly plate assembly; 5. Connecting post; 6. Lower valve shaft base; 7. Lower valve shaft; 8. Upper valve shaft base; 9. Upper valve shaft hole; 10. Upper valve shaft; 11. Upper valve shaft disc; 12. Fixing screw hole; 13. Fixing post; 14. Fixing screw. Detailed Implementation
[0014] 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. Example 1
[0015] like Figure 1-4 As shown, this utility model provides a technical solution: a multi-stage regulating butterfly valve, including a valve body 1, a large butterfly plate assembly 2 disposed on the inner side of the valve body 1, the large butterfly plate assembly 2 being integrally embedded in the middle section of the valve cavity inside the valve body 1, an assembly gap being reserved between the outer peripheral edge of the large butterfly plate assembly 2 and the inner wall of the valve body 1, the large butterfly plate assembly 2 being rotatably connected to the corresponding shaft holes on the inner side of the valve body 1 through short shafts extending from its upper and lower ends, and the central axis of the large butterfly plate assembly 2 coinciding with the central axis of the valve body 1, a connecting screw 3 being fixedly connected to the side of the large butterfly plate assembly 2, and a small butterfly plate disposed on the inner side of the large butterfly plate assembly 2. Component 4, connecting screws 3 are evenly distributed along the circumference of the large butterfly plate component 2, and their threaded ends form a threaded fastening connection with the pressure ring inside the large butterfly plate component 2 to tightly fit the butterfly plate of the large butterfly plate component 2 with the pressure ring, thereby clamping the sealing ring between the two. The small butterfly plate component 4 is embedded in the mounting cavity inside the large butterfly plate component 2, and the small butterfly plate component 4 and the large butterfly plate component 2 are independent rotating structures, respectively corresponding to the small flow rate adjustment and large flow rate adjustment functions. The small butterfly plate component 4 is equipped with a special fixing screw that matches its own size for the fitting and fixing of its internal components. The bottom of the valve body 1 is fixedly connected to the connecting post 5.
[0016] The nested arrangement of the large and small butterfly plate components and the fastening of the connecting screws, combined with the rotating structure, enables multi-stage flow regulation. The bottom connecting column ensures installation stability, balancing adjustment accuracy and structural reliability. Example 2
[0017] like Figure 1-4As shown, this utility model provides a technical solution: a multi-stage regulating butterfly valve, including a valve body 1, a large butterfly plate assembly 2 disposed on the inner side of the valve body 1, the large butterfly plate assembly 2 being integrally embedded in the middle section of the valve cavity inside the valve body 1, an assembly gap being reserved between the outer peripheral edge of the large butterfly plate assembly 2 and the inner wall of the valve body 1, the large butterfly plate assembly 2 forming a rotatable connection with the corresponding shaft holes opened on the inner side of the valve body 1 through the short shafts extending from its upper and lower ends, and the central axis of the large butterfly plate assembly 2 coinciding with the central axis of the valve body 1, a connecting screw 3 being fixedly connected to the side of the large butterfly plate assembly 2, a small butterfly plate assembly 4 disposed on the inner side of the large butterfly plate assembly 2, the connecting screws 3 being evenly distributed along the circumference of the large butterfly plate assembly 2, and their threaded ends forming a threaded fastening connection with the pressure ring inside the large butterfly plate assembly 2, so as to tightly fit the butterfly plate of the large butterfly plate assembly 2 with the pressure ring, thereby clamping the sealing ring between the two. The small butterfly plate assembly 4 is embedded in the mounting cavity inside the large butterfly plate assembly 2. The small butterfly plate assembly 4 and the large butterfly plate assembly 2 are independently rotating structures, corresponding to small flow rate adjustment and large flow rate adjustment functions, respectively. The small butterfly plate assembly 4 is equipped with a special fixing screw that matches its own size for the fitting and fixing of its internal components. The bottom of the valve body 1 is fixedly connected to a connecting post 5. The bottom of the connecting post 5 is fixedly connected to a lower valve shaft base 6. The lower valve shaft 7 is provided on the inner side of the lower valve shaft base 6. The bottom of the valve body 1 is fixedly connected to a connecting post 5. The bottom of the connecting post 5 is fixedly connected to a lower valve shaft base 6. The lower valve shaft 7 is provided on the inner side of the lower valve shaft base 6. The lower valve shaft 7 and the lower valve shaft base 6 are a matching assembly structure. The upper end of the connecting post 5 is fixedly connected to an upper valve shaft base 8. The top surface of the upper valve shaft base 8 is provided with an upper valve shaft hole 9. The inner side of the upper valve shaft base 8 is provided with an upper valve shaft 10.
[0018] Rotational stability is ensured by fitting the upper and lower valve shaft bases with the valve shaft, while the bottom connecting column enhances the installation's firmness, balancing precise flow regulation, smooth rotation, and reliable installation. Example 3
[0019] like Figure 1-4As shown, this utility model provides a technical solution: a multi-stage regulating butterfly valve, including a valve body 1, a large butterfly plate assembly 2 disposed on the inner side of the valve body 1, the large butterfly plate assembly 2 being integrally embedded in the middle section of the valve cavity inside the valve body 1, an assembly gap being reserved between the outer peripheral edge of the large butterfly plate assembly 2 and the inner side wall of the valve body 1, the large butterfly plate assembly 2 being rotatably connected to the corresponding shaft holes on the inner side of the valve body 1 through short shafts extending from its upper and lower ends, and the central axis of the large butterfly plate assembly 2 coinciding with the central axis of the valve body 1, a connecting screw 3 being fixedly connected to the side of the large butterfly plate assembly 2, and a small butterfly plate assembly 4 disposed on the inner side of the large butterfly plate assembly 2, the connecting screw 3... Evenly distributed along the circumference of the large butterfly plate assembly 2, its threaded end forms a threaded fastening connection with the pressure ring inside the large butterfly plate assembly 2, so as to tightly fit the butterfly plate of the large butterfly plate assembly 2 with the pressure ring, thereby clamping the sealing ring between the two. The small butterfly plate assembly 4 is embedded in the mounting cavity inside the large butterfly plate assembly 2, and the small butterfly plate assembly 4 and the large butterfly plate assembly 2 are independent rotating structures, respectively corresponding to the small flow rate adjustment and large flow rate adjustment functions. The small butterfly plate assembly 4 is equipped with a special fixing screw adapted to its own size for the fitting and fixing of its internal components. A connecting post 5 is fixedly connected to the bottom of the valve body 1, and a lower valve shaft base 6 is fixedly connected to the bottom of the connecting post 5. A lower valve shaft 7 is provided on the inner side of the lower valve shaft base 6. A connecting post 5 is fixedly connected to the bottom of the valve body 1. The lower valve shaft base 6 is fixedly connected to the bottom of the connecting post 5. The lower valve shaft 7 is provided on the inner side of the lower valve shaft base 6, and the lower valve shaft 7 and the lower valve shaft base 6 are fitted together. An upper valve shaft base 8 is fixedly connected to the upper end of the connecting post 5. An upper valve shaft hole 9 is provided on the top surface of the upper valve shaft base 8. An upper valve shaft 10 is provided on the inner side of the upper valve shaft base 8. An upper valve shaft disc 11 is fixedly connected to the bottom surface of the upper valve shaft 10. The upper valve shaft base 8 is fixedly connected to the upper end of the connecting post 5. An upper valve shaft hole 9 is provided on the top surface of the upper valve shaft base 8. An upper valve shaft 10 is provided on the inner side of the seat 8. An upper valve shaft disc 11 is fixedly connected to the bottom surface of the upper valve shaft 10. The upper valve shaft 10 passes through the upper valve shaft hole 9 and is assembled with the upper valve shaft base 8. A fixing screw hole 12 is opened on the top surface of the upper valve shaft disc 11. A fixing post 13 is fixedly connected to the inner side of the fixing screw hole 12. A fixing screw 14 is screwed to the surface of the fixing post 13. The fixing screw 14 fixes the fixing post 13 in the fixing screw hole 12 through a screw engagement.
[0020] The assembly stability is enhanced by fixing screw holes, fixing posts and fixing screws on the upper valve shaft disc, while the bottom connecting post improves the overall installation reliability, taking into account adjustment accuracy, rotation stability and assembly firmness.
[0021] Working principle: First, valve body 1 serves as the overall mounting base. Large butterfly plate assembly 2 is integrally embedded in the middle section of the valve cavity inside valve body 1. A pre-reserved assembly gap is left between its outer periphery and the inner wall of valve body 1. Short shafts extending from the upper and lower ends form a rotational fit with corresponding shaft holes on the inner side of valve body 1, with the central axis coinciding with valve body 1, achieving large flow regulation. Connecting screws 3 are evenly distributed along the circumference of large butterfly plate assembly 2, vertically mounted in its side flange holes without penetrating. The threaded ends are tightened with the internal pressure ring of large butterfly plate assembly 2, tightly fitting the butterfly plate and pressure ring to clamp the sealing ring between them, ensuring the sealing performance of large butterfly plate assembly 2. Small butterfly plate assembly 4 is embedded in the inner mounting cavity of large butterfly plate assembly 2, its outer periphery tightly fitting the inner wall of large butterfly plate assembly 2. It is secured with dedicated fixing screws of appropriate size, and has an independent rotating structure compared to large butterfly plate assembly 2, achieving small flow regulation. The bottom of valve body 1 is connected by connecting post 5. The lower valve shaft base 6 is fixed, and the lower valve shaft 7 is fitted and assembled with the lower valve shaft base 6. The upper valve shaft base 8 is fixed at the upper end of the connecting column 5. The upper valve shaft 10 is assembled through the upper valve shaft hole 9 on the top surface of the upper valve shaft base 8. The upper valve shaft disc 11 on its bottom surface is fixed by the screw engagement of the fixing screw hole 12, the fixing column 13 and the fixing screw 14. The upper valve shaft 10 and the lower valve shaft provide independent rotation drive for the small butterfly plate assembly 4 and the large butterfly plate assembly 2, respectively, so that the two can independently realize small flow and large flow regulation.
[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A multi-stage regulating butterfly valve, comprising a valve body (1), characterized in that: A large butterfly plate assembly (2) is provided on the inner side of the valve body (1). A connecting screw (3) is fixedly connected to the side of the large butterfly plate assembly (2). A small butterfly plate assembly (4) is provided on the inner side of the large butterfly plate assembly (2). A connecting column (5) is fixedly connected to the bottom of the valve body (1). A lower valve shaft base (6) is fixedly connected to the bottom of the connecting column (5). A lower valve shaft (7) is provided on the inner side of the lower valve shaft base (6). An upper valve is fixedly connected to the upper end of the connecting column (5). The upper valve shaft base (8) has an upper valve shaft hole (9) on its top surface. An upper valve shaft (10) is provided on the inner side of the upper valve shaft base (8). An upper valve shaft disc (11) is fixedly connected to the bottom surface of the upper valve shaft (10). A fixing screw hole (12) is provided on the top surface of the upper valve shaft disc (11). A fixing post (13) is fixedly connected to the inner side of the fixing screw hole (12). A fixing screw (14) is screwed onto the surface of the fixing post (13).
2. The multi-stage regulating butterfly valve according to claim 1, characterized in that: The large butterfly plate assembly (2) is embedded in the middle section of the valve cavity inside the valve body (1). There is a pre-reserved assembly gap between the outer peripheral edge of the large butterfly plate assembly (2) and the inner side wall of the valve body (1). The large butterfly plate assembly (2) is connected to the shaft hole corresponding to the inner side of the valve body (1) through the short shaft extending from its upper and lower ends. The central axis of the large butterfly plate assembly (2) coincides with the central axis of the valve body (1).
3. The multi-stage regulating butterfly valve according to claim 1, characterized in that: The connecting screws (3) are evenly distributed along the circumference of the large butterfly plate assembly (2). Their threaded ends form a threaded fastening connection with the pressure ring inside the large butterfly plate assembly (2) to tightly fit the butterfly plate of the large butterfly plate assembly (2) with the pressure ring, thereby clamping the sealing ring between the two. The small butterfly plate assembly (4) is embedded in the mounting cavity inside the large butterfly plate assembly (2), and the small butterfly plate assembly (4) and the large butterfly plate assembly (2) are independent rotating structures, respectively corresponding to the small flow rate adjustment and large flow rate adjustment functions. The small butterfly plate assembly (4) is equipped with a special fixing screw that is adapted to its own size for the fitting and fixing of its internal components.
4. A multi-stage regulating butterfly valve according to claim 1, characterized in that: The bottom of the valve body (1) is fixedly connected to a connecting column (5), and the bottom of the connecting column (5) is fixedly connected to a lower valve shaft base (6). A lower valve shaft (7) is provided on the inner side of the lower valve shaft base (6), and the lower valve shaft (7) and the lower valve shaft base (6) are a matching assembly structure.
5. A multi-stage regulating butterfly valve according to claim 1, characterized in that: The upper end of the connecting column (5) is fixedly connected to the upper valve shaft base (8). The top surface of the upper valve shaft base (8) is provided with an upper valve shaft hole (9). An upper valve shaft (10) is provided on the inner side of the upper valve shaft base (8). An upper valve shaft disc (11) is fixedly connected to the bottom surface of the upper valve shaft (10). The upper valve shaft (10) passes through the upper valve shaft hole (9) and is assembled with the upper valve shaft base (8).
6. A multi-stage regulating butterfly valve according to claim 1, characterized in that: The top surface of the upper valve shaft disc (11) is provided with a fixing screw hole (12), and a fixing post (13) is fixedly connected to the inner side of the fixing screw hole (12). A fixing screw (14) is screwed to the surface of the fixing post (13), and the fixing screw (14) fixes the fixing post (13) in the fixing screw hole (12) through a screw engagement.