A water pipeline butterfly valve capable of being opened after pressure release
By setting openable and closable pressure relief holes on both sides of the butterfly valve plate and a lifting valve plate structure, the problem of difficulty in opening traditional butterfly valves under high pressure differential conditions is solved, achieving low torque opening and reducing valve plate wear.
Patent Information
- Application Number
- CN202521541468.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-23
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-07-23
AI Technical Summary
Traditional butterfly valves are difficult to open under high pressure differential conditions, and the opening and closing torque required to overcome far exceeds the design value, making the valve difficult to open.
Design a hydraulic pipeline butterfly valve that can be opened after pressure relief. By setting openable and closable pressure relief holes and lifting valve plate structure on both sides of the butterfly valve plate, the pressure difference on both sides of the pipeline can be balanced before opening, reducing the difficulty of opening.
The pressure difference is balanced before opening by using the pressure relief hole and the lifting valve plate structure, which reduces the difficulty of opening the butterfly valve and reduces the wear of the valve plate.
Smart Images
Figure CN224944295U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of water conservancy engineering, and in particular to a butterfly valve for water conservancy pipelines that can be opened after pressure relief. Background Technology
[0002] Butterfly valves, commonly used shut-off devices in water pipeline systems, rely on the core technology of rotating a butterfly plate to control the flow of fluid. Traditional butterfly valves employ metal or rubber soft seals, offering advantages such as small size, light weight, and rapid opening and closing. However, under high pressure differential conditions, when a significant pressure difference exists across the pipeline (e.g., high pressure upstream, low pressure downstream), the medium pressure causes the butterfly plate to press tightly against the valve seat sealing surface, generating enormous static friction. The opening and closing torque required to overcome this force far exceeds the design value, making valve opening difficult. Utility Model Content
[0003] The purpose of this invention is to provide a hydraulic pipeline butterfly valve that can be opened after pressure relief, so as to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: A pressure-relieving butterfly valve for hydraulic pipelines includes a butterfly valve body, fixed lugs, fixed bearings, a main shaft, a butterfly valve plate, a connecting rod, a handle, and openable / closeable pressure relief holes. The butterfly valve body has fixed lugs integrally formed around its circumference. A fixed bearing is installed inside the top of the butterfly valve body. A main shaft is installed at the center of the butterfly valve body via the fixed bearing. Butterfly valve plates are installed on both sides of the main shaft. A connecting rod is installed on the top of the main shaft, and a handle is installed on the top side of the connecting rod. Openable / closeable pressure relief holes are provided on the upper sides of both sides of the butterfly valve plate, and these holes open before the butterfly valve plate is rotated, thus balancing the pipeline pressure on both sides of the valve body.
[0005] Preferably, the hydraulic pipeline butterfly valve that can be opened after pressure relief also includes a square reserved groove, a valve plate lifting groove, a spring, a square control rod, and a lifting valve plate. The main shaft has a square reserved groove inside, and the valve plate has a valve plate lifting groove in the center inside. A spring is installed in the bottom of the square reserved groove, and a square control rod is installed in the square reserved groove. Lifting valve plates are installed on the left and right sides of the square control rod. The lifting valve plates on both sides are installed above the valve plate lifting grooves on the corresponding sides. The top of the square control rod is connected to the handle through a connecting rod. The openable and closable pressure relief holes are located above the valve plate lifting grooves on both sides, and the opening and closing of the pressure relief holes can be controlled by the lifting of the lifting valve plates.
[0006] The beneficial effects of this utility model are: This utility model is reasonably designed. By setting a pressure relief hole in the valve plate of the butterfly valve, the pressure difference on both sides of the pipeline can be balanced through the pressure relief hole before the butterfly valve is opened, which reduces the difficulty of opening the butterfly valve and reduces the wear of the valve plate. Attached Figure Description
[0007] Figure 1 This is a schematic diagram of the structure of the hydraulic pipeline butterfly valve that can be opened after pressure relief according to this utility model; Figure 2 This is a schematic diagram of the internal structure of the butterfly valve plate of the hydraulic pipeline butterfly valve that can be opened after pressure relief, according to this utility model.
[0008] In the diagram: 1. Distribution box, 2. Cabinet door, 3. Ventilation hole, 4. Lower opening slot, 5. Upper opening slot, 6. Mounting back panel, 7. Upper opening clip, 8. Lower opening clip, 9. Fixing clip, 10. Wiring hole, 11. Fixing clip, 12. Grounding metal strip, 13. Terminal block, 14. Handle. Detailed Implementation
[0009] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: like Figures 1-2 As shown, a hydraulic pipeline butterfly valve that can be opened after pressure relief includes a butterfly valve body 1, a fixed lug 2, a fixed bearing 3, a main shaft 4, a butterfly valve plate 5, a connecting rod 6, a handle 7, and an openable / closeable pressure relief hole 8. The butterfly valve body 1 is integrally formed with fixed lugs 9 on all four sides. A fixed bearing 3 is installed inside the top of the butterfly valve body 1. The main shaft 4 is installed in the center of the butterfly valve body 1 through the fixed bearing 3. The butterfly valve plate 5 is installed on both sides of the main shaft 4. A connecting rod 6 is installed on the top of the main shaft 4. A handle 7 is installed on the top side of the connecting rod 6. An openable / closeable pressure relief hole 8 is opened on the upper sides of both sides of the butterfly valve plate 5. The openable / closeable pressure relief hole 8 is opened before the butterfly valve plate 5 is rotated to balance the pipeline pressure on both sides of the valve body. The hydraulic pipeline butterfly valve that can be opened after pressure relief also includes a square reserved groove 9, a valve plate lifting groove 10, a spring 11, a square control rod 12, and a lifting valve plate 13. The main shaft 4 has a square reserved groove 9 inside, and the valve plate 5 has a valve plate lifting groove 10 in the center inside. The spring 11 is installed in the bottom of the square reserved groove 9, and the square control rod 12 is installed in the square reserved groove 9. Lifting valve plates 13 are installed on the left and right sides of the square control rod 12. The lifting valve plates 13 on both sides are installed above the valve plate lifting grooves 10 on the corresponding sides. The top of the square control rod 12 is connected to the handle 7 through a connecting rod 6. The pressure relief holes 8 that can be opened and closed are located above the valve plate lifting grooves 10 on both sides, and can be opened and closed by lifting the lifting valve plates 13.
[0010] The working principle of this utility model is as follows: the pressure relief hole 8 can be opened before rotating the butterfly valve plate 5 to balance the pressure in the pipelines on both sides of the valve body. The pressure relief hole 8 can be opened by the lifting valve plate 13 moving up and down in the valve plate lifting groove 10. The lifting valve plate 13 can be driven by the pressing handle 7 to drive the connecting rod 6 to push the square control rod 12 in the square reserved groove 9 inside the main shaft 4 to move down, thereby driving the lifting valve plate 13 to lower and open the pressure relief hole 8. After the butterfly valve is opened and closed, the square control rod 12 can be driven to rise by the spring 11, and the lifting valve plate 13 can be used to close the pressure relief hole 8.
[0011] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary in all respects, and thus equivalent variations within the scope of this invention are included within its scope.
Claims
1. A hydraulic pipeline butterfly valve that can be opened after pressure relief, comprising a butterfly valve body (1), a fixed lug (2), a fixed bearing (3), a main shaft (4), a butterfly valve plate (5), a connecting rod (6), a handle (7), and an openable and closable pressure relief hole (8), characterized in that: The butterfly valve body (1) is integrally formed with fixed lugs (2) on all four sides. A fixed bearing (3) is installed inside the top of the butterfly valve body (1). A main shaft (4) is installed in the center of the butterfly valve body (1) through the fixed bearing (3). A butterfly valve plate (5) is installed on both sides of the main shaft (4). A connecting rod (6) is installed on the top of the main shaft (4). A handle (7) is installed on the top side of the connecting rod (6). A pressure relief hole (8) is opened on both sides of the butterfly valve plate (5). The pressure relief hole (8) is opened before rotating the butterfly valve plate (5) to balance the pressure in the pipeline on both sides of the valve body.
2. The hydraulic pipeline butterfly valve that can be opened after pressure relief according to claim 1, characterized in that: The hydraulic pipeline butterfly valve that can be opened after pressure relief also includes a square reserved groove (9), a valve plate lifting groove (10), a spring (11), a square control rod (12), and a lifting valve plate (13). The main shaft (4) has a square reserved groove (9) inside. The valve plate (5) of the butterfly valve has a valve plate lifting groove (10) in the center inside. A spring (11) is installed in the bottom of the square reserved groove (9). A square control rod (12) is installed in the square reserved groove (9). Lifting valve plates (13) are installed on the left and right sides of the square control rod (12). The lifting valve plates (13) on both sides are installed above the valve plate lifting grooves (10) on the corresponding sides. The top of the square control rod (12) is connected to the handle (7) through a connecting rod (6). The pressure relief holes (8) that can be opened and closed are located above the valve plate lifting grooves (10) on both sides, and the pressure relief holes can be opened and closed by the lifting of the lifting valve plate (13).