The utility model discloses a novel soft-seal gate valve, which includes a valve body, a valve cover, a valve rod, a valve chamber, and a rubber-coated gate plate. The valve rod penetrates through the valve cover and is connected to the rubber-coated gate plate. The valve chamber includes a medium channel for medium circulation and a connecting chamber that is connected to the medium channel and corresponds to the valve cover. The rubber-coated gate plate is adapted to the connecting chamber and used to cut off or connect the medium channel. The medium channel includes an inlet end and an outlet end. Guide rails are arranged on the inner wall of the connecting chamber on both sides opposite to the rubber-coated gate plate. Both sides of the rubber-coated gate plate are provided with metal sliders, and the metal sliders are provided with sliding grooves that are adapted to the guide rails. Compared to existing soft-seal gate valves, the utility model has good sealing performance, convenient disassembly and assembly, and a long service life for the rubber-coated gate plate.
1. A novel soft-seal gate valve comprises a valve body, a valve cover, a valve rod, a valve chamber, and a rubber-coated gate plate. The valve rod penetrates through the valve cover and is connected to the rubber-coated gate plate. The valve chamber includes a medium passage for medium circulation and a connecting chamber connected to the medium passage and corresponding to the valve cover. The rubber-coated gate plate is fitted to the connecting chamber and used to cut off or connect the medium passage. The medium passage includes an inlet end and an outlet end. The utility model is characterized in that guide rails are arranged on both sides of the rubber-coated gate plate on the inner wall of the connecting chamber, metal sliding blocks are arranged on both side walls of the rubber-coated gate plate, sliding grooves adapted to the guide rails are opened on the metal sliding blocks, a sealing groove is opened on the top of the valve cover in the axial direction relative to the valve rod, a clamping block is arranged at the opening of the sealing groove, at least three clamping blocks are arranged circumferentially at intervals relative to the central axis of the sealing groove, a sealing seat fitted to and sleeved on the valve rod is arranged inside the sealing groove, a fixed block corresponding to the rotational fit of the clamping block is arranged on the outer circumferential wall at the bottom of the sealing seat, a pressing block abutting against the top surface of the valve cover is arranged on the top of the sealing seat, and a rubber sleeve is sleeved on the top of the valve cover.
2. A novel soft-seal gate valve according to claim 1, characterized in that a limit opening is provided at the position on the pressure block corresponding to the gap between two adjacent clamping blocks, a limit groove is provided on the end face of the pressure block, a thrust stopper is provided on the sealing seat, and the thrust stopper comprises a fixed disc adapted to the limit groove and a thrust block provided on the outer circumferential wall of the fixed disc and adapted to the limit opening.
3. A novel soft seal gate valve according to claim 2, characterized in that a limiting block is arranged on the outer circumferential wall of the sealing seat at a position between two adjacent fixing blocks, and a clamping groove adapted to the limiting block is provided on the thrust block.
4. A novel soft seal gate valve according to claim 1, characterized in that a stepped groove is provided in the valve body at the inlet end, and a filter screen is arranged inside the stepped groove.
5. A novel soft-seal gate valve according to claim 4, characterized in that the side of the filter screen facing the inlet end is provided with a flow dividing device, which comprises a fixing ring that fits with interference with the inner wall of the stepped groove, a connecting column located on the central axis of the fixing ring, and a flow dividing plate connected to the fixing ring and the connecting column. The side of the stepped groove located on the inlet end facing the fixing ring is provided with an inner groove, and an elastic snap ring is arranged in the inner groove.
6. A novel soft seal gate valve according to claim 5, characterized in that the side wall of the diverter plate facing the inlet end has a triangular cross-section.
7. A novel soft seal gate valve according to claim 5, characterized in that one end of the connecting column facing the inlet end is hemispherical