A self-sealing butterfly valve includes a valve body, wherein a fluid passage is provided in the valve body, a valve plate of which an outer surface is covered with an elastic sealing layer is provided within the fluid passage, an upper portion of the valve plate is dynamically connected with a driv
A self-sealing butterfly valve includes a valve body, wherein a fluid passage is provided in the valve body, a valve plate of which an outer surface is covered with an elastic sealing layer is provided within the fluid passage, an upper portion of the valve plate is dynamically connected with a driving shaft which is rotatably connected to the valve body, a lower portion of the valve plate is rotatably connected with a supporting shaft which is connected to the valve body, the elastic sealing layer—at outer edges of two end faces of the valve plate axially protrudes outwardly, forming two ring lips attached to an inner wall of the fluid passage, and the ring lips are gradually thicker from outside to inside, so that inner ring faces of the ring lips are inclined faces.
대표청구항▼
1. A self-sealing butterfly valve, comprising a valve body, wherein a fluid passage is provided in the valve body, a valve plate is provided within the fluid passage, an upper portion of the valve plate is dynamically connected with a driving shaft which is rotatably connected to the valve body, a l
1. A self-sealing butterfly valve, comprising a valve body, wherein a fluid passage is provided in the valve body, a valve plate is provided within the fluid passage, an upper portion of the valve plate is dynamically connected with a driving shaft which is rotatably connected to the valve body, a lower portion of the valve plate is rotatably connected with a supporting shaft which is connected to the valve body, and wherein the valve plate is sleeved with an elastic sealing ring which is capable of enveloping an outer periphery face of the valve plate and outer edges of two end faces of the valve plate, outer edges of two end faces of the elastic sealing ring axially protrude outwardly, forming two ring lips attached to an inner wall of the fluid passage, and the ring lips are gradually thicker in an axial direction from outside to inside relative to the valve plate, so that inner ring faces of the ring lips are inclined faces; wherein the elastic sealing ring comprises a loop for covering the outer peripheral face of the valve plate, the loop has a driving shaft mounting hole and a supporting shaft mounting hole at two opposite sides, two barriers are provided at intervals on an inner wall face of the loop, the two barriers and the loop form, in concert, a mounting annular groove for sleeving the valve plate, outer side faces of two barriers form the two end faces of the elastic sealing ring, the ring lips are arranged at outer edges of the barriers, and convex ribs are circularly provided on the two end faces of the elastic sealing ring. 2. The self-sealing butterfly valve according to claim 1, wherein an upper inflated portion for connection with the driving shaft is provided at the upper portion of the valve plate, a lower inflated portion for connection with the supporting shaft is provided at the lower portion of the valve plate, a lower surface of the upper inflated portion and an upper surface of the lower inflated portion are oppositely arranged, and an area of the lower surface of the upper inflated portion is greater than an area of the upper surface of the lower inflated portion. 3. The self-sealing butterfly valve according to claim 1, wherein the two end faces of the valve plate are respectively connected with a stop ring, inner end faces of two stop rings are respectively attached with pressure on the two end faces of the elastic sealing ring, outer peripheral faces of two stop rings are all inclined faces which may abut against the inner ring faces, inner end faces of the stop rings are provided with locating annular grooves, and the convex ribs may be inserted into the locating annular grooves. 4. The self-sealing butterfly valve according to claim 3, wherein the stop rings are circularly arranged with a plurality of bolt penetration holes and a plurality of threaded holes, the stop rings are connected to the valve plate by being inserted bolts into the bolt penetration holes, and screws abutting against the valve plate are threaded inside the threaded holes. 5. The self-sealing butterfly valve according to claim 4, wherein the stop ring is a split structure comprising a plurality of unit sheets, wherein each unit sheet is at least provided with two bolt penetration holes and one threaded hole. 6. The self-sealing butterfly valve according to claim 3, wherein a thickness of the stop ring is less than an axial length of the ring lip.
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