一种手动和液动主汽阀
By incorporating a radial through-hole and manual screw structure in the main steam valve, combined with an opening and closing proximity switch for monitoring, the problems of complex main steam valve structure and inaccurate position monitoring are solved, achieving faster closing speed and reduced maintenance costs, while improving the flexibility of flow regulation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG JIETEYOU POWER MACHINERY
- Filing Date
- 2025-07-29
- Publication Date
- 2026-07-17
AI Technical Summary
The existing main steam valve has a complex structure, is difficult to manufacture, has high maintenance costs, and has a complicated opening process. It cannot accurately monitor the valve stem position and cannot adjust the butterfly valve opening according to the flow rate.
Design a manual and hydraulic main steam valve that achieves quick closing by setting a radial through hole on the oil cylinder, simplifies the control module, uses a handwheel to drive a screw to push the piston, and is equipped with an openable proximity switch and a dial for position monitoring, reducing reliance on oil circuits and external hydraulic systems.
It improves the fast closing speed of the main steam valve, reduces maintenance costs, simplifies the control structure, and enhances the monitoring accuracy of the valve stem position and the flexibility of flow regulation.
Smart Images
Figure CN224516099U_ABST
Abstract
Claims
1. A manual and hydraulic main steam valve comprising a valve housing (1), characterized in that: The valve housing (1) has a steam chamber (2) inside. A valve cover (3) is installed on the upper end of the valve housing (1) via a flange. Supports (4) are symmetrically installed on both sides of the upper end of the valve cover (3). A cylinder (5) is installed on the upper end of the two supports (4). A piston (6) is movably installed inside the cylinder (5). The piston (6) has a radial through hole. A top cover (7) is installed on the upper end of the cylinder (5) via a flange. A fixing nut (8) is installed on the upper end of the top cover (7) via a mounting hole. A screw is installed inside the fixing nut (8) with a through thread. 9), a disc valve (10) is rotatably installed at the lower end of the screw (9) and inside the oil cylinder (5), a connecting rod (11) is installed at the lower end of the piston (6), the lower end of the connecting rod (11) passes through the oil cylinder (5) and is equipped with a valve stem (12), the lower end of the valve stem (12) extends into the steam chamber (2) and is equipped with a valve disc (13), a quick-closing device (14) is installed on one side of the surface of the oil cylinder (5), a return oil pipe (15) is installed on the surface of the oil cylinder (5) above the piston (6), and a position detection component (16) is installed between the two brackets (4).
2. The manual and hydraulic main steam valve according to claim 1, characterized in that: A handwheel (17) is installed on the upper end of the screw (9). An installation groove (18) is provided at the top of the inside of the oil cylinder (5). A spring (19) is installed inside the installation groove (18). The upper end of the piston (6) is connected to the lower end of the spring (19). A piston seal (20) is installed on the surface of the piston (6). The piston seal (20) is in contact with the inner wall of the oil cylinder (5).
3. The manual and hydraulic main steam valve according to claim 1, characterized in that: The lower end of the screw (9) is equipped with a thrust ball bearing (21), and the disc valve (10) is rotatably mounted on the thrust ball bearing (21).
4. The manual and hydraulic main steam valve according to claim 1, characterized in that: A valve seat (22) is installed inside the steam chamber (2) below the valve disc (13), and the valve seat (22) and the valve disc (13) can form a seal.
5. The manual and hydraulic main steam valve according to claim 1, characterized in that: The bottom end of the oil cylinder (5) is provided with an L-shaped oil chamber (23). The quick-closing device (14) is installed at one end of the oil cylinder (5). The L-shaped oil chamber (23) and the quick-closing device (14) are connected. One end of the quick-closing device (14) is respectively equipped with an oil inlet connection pipe (25) and an oil return pipe (26). The quick-closing device (14) integrates an unloading valve.
6. The manual and hydraulic main steam valve according to claim 1, characterized in that: The connecting rod (11) passes through the oil cylinder (5) through the first mounting hole. A sealing component (27) is installed inside the first mounting hole. An oil baffle (28) is installed at the lower end of the connecting rod (11). A connecting ring (29) is installed at the upper end of the valve stem (12). The connecting ring (29) and the oil baffle (28) are connected by bolts. The valve stem (12) passes through the valve housing (1) through the second mounting hole. A bushing (31) is installed inside the second mounting hole and outside the valve stem (12). A flexible graphite ring (32) is installed on the surface of the valve stem (12) above the bushing (31).
7. The manual and hydraulic main steam valve according to claim 6, characterized in that: A leakage oil passage (30) is provided on the surface of the oil cylinder (5) on one side of the sealing assembly (27), and a leakage detection pipe (24) is installed at one end of the leakage oil passage (30).
8. The manual and hydraulic main steam valve according to claim 6, characterized in that: The position detection component (16) includes a mounting plate (1601), a moving rod (1602), a pointer (1603), a proximity switch (1604), and a scale plate (1605). Mounting plates (1601) are installed on the front and rear of the upper end of the valve cover (3) between the brackets (4). A moving rod (1602) is installed on the surface of the oil baffle (28). A guide groove is provided on the surface of one mounting plate (1601). One end of the moving rod (1602) passes through the guide groove and is equipped with a pointer (1603). A scale plate (1605) is installed on the surface of the mounting plate (1601) on one side of the guide groove. A proximity switch (1604) is installed on one end of the other mounting plate (1601) on one side of the oil baffle (28).