一种刀闸阀
By introducing a rolling friction pair and cylinder drive into the knife gate valve, the problems of gate jamming and wear are solved, achieving efficient, reliable, and long-life opening and closing operations, suitable for working conditions with fluids containing impurities.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YONGNENG HI-TECH (HUBEI) MACHINERY EQUIPMENT CO LTD
- Filing Date
- 2025-09-19
- Publication Date
- 2026-07-17
AI Technical Summary
When handling fluids containing impurities such as solid particles, dust, or fibers, existing knife gate valves are prone to jamming of the gate movement, leading to difficulties in opening and closing, reduced sealing performance, and severe wear, which affects service life and the stability of the production system.
The system employs a rolling structure on both sides of the gate to form a rolling friction pair with the track structure in the channel, replacing the traditional sliding friction mode. It uses rolling components such as needle roller bearings to reduce friction loss and achieves smooth movement through cylinder drive.
Significantly reduces motion resistance, extends valve life, improves opening and closing efficiency and reliability, adapts to harsh working conditions, and reduces energy consumption and maintenance costs.
Smart Images
Figure CN224515988U_ABST
Abstract
Claims
1. A knife gate valve characterized by, include: Gate, valve body, valve cover, and drive mechanism; The valve body is connected to the valve cover, and after the connection, a through channel is formed inside. The drive mechanism is used to drive the gate to reciprocate within the channel; The gate is provided with rolling structures on both sides along its width, and a track structure that cooperates with the rolling structures is provided at the positions corresponding to the two sides of the gate in the channel.
2. The knife gate valve of claim 1, wherein, The rolling structure includes a plurality of first pulley components, which protrude from both sides of the gate plate, and their rotation axis is parallel to the gate plate and perpendicular to the track structure. The track structure includes a track component one disposed inside the valve cover. The track component one includes an upper track and a lower track arranged opposite to each other along the thickness direction of the valve cover. The first pulley component rolls in the gap between the upper track and the lower track.
3. The knife gate valve of claim 2, wherein, The track structure also includes a second track component disposed within the valve body. The second track component is located on the non-sealing surface of the inner wall of the valve body, and is used to support the first pulley component and to press the gate towards the sealing surface of the inner wall of the valve body.
4. The knife gate valve of claim 2, wherein, The first pulley component is a needle roller bearing.
5. The knife gate valve of claim 3, wherein, The rolling structure further includes a plurality of second pulley components, which are disposed on the non-sealing surface of the gate and on both sides in the width direction, and their rotation axes are perpendicular to the gate and the track structure. When the second pulley component is inside the valve cover, it rolls on the side wall of the corresponding upper or lower rail near the gate. When the second pulley component is inside the valve body, it rolls on the side wall of the second track component near the gate.
6. The knife gate valve of claim 1, wherein, A third pulley component is provided at the middle position of the non-sealed surface at the bottom of the gate. The rotation axis of the third pulley component is parallel to the gate and perpendicular to the sliding direction of the gate. The bottom of the valve body is provided with a wedge-shaped block that cooperates with the third pulley component; When the gate moves to the bottom of the valve body, the third pulley component rolls along the inclined surface of the wedge block.
7. The knife gate valve of claim 2, wherein, The drive mechanism has two parts, and its output ends are respectively connected to the two ends of the top of the gate.
8. The knife gate valve of claim 7, wherein, The two drive mechanisms are respectively located on both sides of the valve body, and the output end is located inside the valve cover.
9. The knife gate valve of claim 7, wherein, The driving mechanism is a cylinder, and the output end is a cylinder rod.
10. The knife gate valve of claim 1, wherein, The non-sealing surface of the gate and the outer surface of the valve cover are both provided with reinforcing ribs.