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CN-121993635-A - Flange rotary fireproof check valve

CN121993635ACN 121993635 ACN121993635 ACN 121993635ACN-121993635-A

Abstract

The invention relates to the technical field of uniflow valves, and discloses a flange rotary fireproof uniflow valve, which comprises a valve body and a valve cover, wherein an assembling part is arranged between the valve body and the valve cover, the assembling part comprises a valve component, the valve component comprises a valve seat valve cover arranged on the right side of the valve cover and a sealing part is arranged between the valve seat, the rubber backing ring is softened and decomposed under the condition of high temperature, at the moment, the extruded V-shaped spring ring can release resilience force to the right side, the softened rubber backing ring is extruded, the V-shaped spring ring has the advantages that the whole elastic performance of the V-shaped spring ring can be gradually released by the step-by-step melting rubber backing ring, the melted rubber backing ring is extruded to be pressed into the first rectangular grooves and the second rectangular grooves for storage, the phenomenon that residues of the melted rubber backing ring leak into a channel through gaps to pollute a medium is avoided, the first metal backing ring is in contact with the right protruding block of the second metal backing ring for hard sealing, the first metal backing ring and the second metal backing ring alternately ensure the fireproof sealing effect of the whole one-way valve, and safe and stable operation of the valve is guaranteed.

Inventors

  • HAN CHENGJUN
  • Min Ruisong
  • ZHOU MING
  • YUAN HUI
  • MO YEAN
  • CHEN GENGYAN

Assignees

  • 江苏孚杰高端装备制造(集团)股份有限公司

Dates

Publication Date
20260508
Application Date
20260410

Claims (10)

  1. 1. The flange rotary fireproof uniflow valve is characterized by comprising a valve body (1) and a valve cover (2), wherein an assembling part (3) is arranged between the valve body (1) and the valve cover (2), the assembling part (3) comprises a valve component (31), the valve component (31) comprises a valve seat (311) arranged on the right side of the valve cover (2), a sealing part (4) is arranged between the valve cover (2) and the valve seat (311), and the sealing part (4) is used for conducting fireproof sealing on a connecting part of the assembling part (3); The sealing part (4) comprises a sealing groove (41) arranged on a joint surface between the valve seat (311) and the valve cover (2), the sealing groove (41) is an annular groove, a sealing component (42) and an extrusion component (43) are arranged in the sealing groove (41), the sealing component (42) comprises a metal backing ring I (421) arranged on the inner wall of the sealing groove (41), a cavity is formed in one side, close to the valve seat (311), of the metal backing ring I (421), a V-shaped spring ring (422) is arranged on the inner wall of the cavity of the metal backing ring I (421), and a rubber backing ring (423) is arranged on the inner wall of the cavity of the metal backing ring I (421); The inner wall of the sealing groove (41) is provided with a second metal backing ring (424), the second metal backing ring (424) is in contact with the rubber backing ring (423), and the second metal backing ring (424) is in contact with the first metal backing ring (421).
  2. 2. A flange rotary fire protection single flow valve according to claim 1, characterized in that the pressing assembly (43) comprises a top ring (431) arranged on the inner wall of the sealing groove (41), the top ring (431) being located on the left side of the metal backing ring one (421).
  3. 3. The flange rotary fireproof check valve according to claim 2, wherein a plurality of connecting grooves (432) are formed in the inner wall of the valve cover (2), and the plurality of connecting grooves (432) are communicated with the sealing groove (41).
  4. 4. A flange rotary fireproof uniflow valve according to claim 3, wherein the left side and the right side of the outer wall of the V-shaped spring ring (422) are respectively provided with a plurality of first rectangular grooves (422 a) and a plurality of second rectangular grooves (422 b), and the plurality of first rectangular grooves (422 a) and the plurality of second rectangular grooves (422 b) are respectively and alternately arranged in sequence.
  5. 5. The flange rotary fireproof uniflow valve according to claim 4, characterized in that the valve seat (311) is hinged with a valve flap (312), the assembly part (3) further comprises a splicing assembly (32), the splicing assembly (32) comprises a splicing step (321) arranged on the left side of the valve body (1), and the splicing step (321) is attached to the right side of the valve seat (311).
  6. 6. The flange rotary fireproof uniflow valve according to claim 5, characterized in that the outer wall of the valve seat (311) is sleeved with a fireproof sealing ring (32 a) and a valve seat sealing ring (32 b), and the fireproof sealing ring (32 a) and the valve seat sealing ring (32 b) are both arranged at the joint of the valve body (1) and the valve clack (312) to seal the valve body.
  7. 7. The flange rotary fireproof uniflow valve according to claim 6, wherein the outer walls of the valve body (1) and the valve cover (2) are fixedly connected with connecting rings (322), and the two connecting rings (322) are fixed through bolts.
  8. 8. The flange rotary fireproof uniflow valve according to claim 7, wherein the connecting parts (5) are arranged at the ends, far away from each other, of the valve body (1) and the valve cover (2), the connecting parts (5) comprise fixing rings (51) fixedly connected to the right outer wall of the valve body (1) and the left outer wall of the valve cover (2), fixing ring steps (53 b) are fixedly connected to the outer walls of the two fixing rings (51), a rotary flange (52) is rotatably connected to the outer walls of the fixing ring steps (53 b), and a plurality of steel balls (53) are arranged at the rotary connecting positions of the fixing rings (51) and the rotary flange (52).
  9. 9. A flange rotary fire protection check valve according to claim 8, characterized in that both of the fixing rings (51) are provided with a compression ring (54), the compression ring (54) being arranged at the periphery of a number of steel balls (53).
  10. 10. The flange rotary fireproof uniflow valve according to claim 9, wherein a baffle ring (55) is fixedly connected to the inner wall of the fixed ring (51), a plurality of screws (56) are connected to the baffle ring (55) in a threaded manner, and the screws (56) are in contact with the compression ring (54).

Description

Flange rotary fireproof check valve Technical Field The invention relates to the field of check valves, in particular to a flange rotary fireproof check valve. Background The check valve used in the fracturing operation is a key safety component of a high-pressure fluid control system, needs to meet working conditions such as high flow, ultrahigh pressure, quick closing response, erosion resistance and the like, and even needs to meet fireproof requirements so that the check valve can normally work in a fire disaster to realize timely blocking of a flow passage medium, the check valve is a valve capable of realizing automatic opening and closing by utilizing fluid pressure difference, fluid enters from an inlet, pressure pushes a valve clack to overcome the gravity of the valve clack, and the valve clack is pressed on a valve seat by the combined action of the lateral pressure and the gravity of the valve clack when the flow passage is opened to allow the fluid to flow in the forward direction and the fluid flows in the reverse direction, so that sealing blocking backflow is formed. The existing fireproof uniflow valve is sealed at a sealing part in a mode of soft sealing and hard sealing which are mutually overlapped, and under a high-temperature working condition, the traditional overlapping mode can soften and melt a rubber backing ring, so that melted residues possibly leak into a channel pollution medium, the safe and stable operation of the valve is affected, and gaps are reserved at the softened rubber backing ring to affect the overall sealing effect. Disclosure of Invention The invention provides a flange rotary fireproof check valve, which solves the technical problems that in the prior art, under the high-temperature working condition, after a rubber backing ring is softened and melted, the melted residues possibly leak into a channel pollution medium, so that the safe and stable operation of the valve is affected, and gaps are reserved at the softened rubber backing ring to affect the overall sealing effect. The invention provides a flange rotary fireproof check valve, which comprises a valve body and a valve cover, wherein an assembling part is arranged between the valve body and the valve cover, the assembling part comprises a valve component, the valve component comprises a valve seat valve cover arranged on the right side of the valve cover, and a sealing part is arranged between the valve seat and is used for fireproof sealing of a connecting part of the assembling part; The sealing part comprises a sealing groove which is arranged on the joint surface between the valve seat and the valve cover, the sealing groove is an annular groove, a sealing component and an extrusion component are arranged in the sealing groove, the sealing component comprises a first metal backing ring which is arranged on the inner wall of the sealing groove, a cavity is formed in one side, close to the valve seat, of the first metal backing ring, a V-shaped spring ring is arranged on the inner wall of the cavity of the first metal backing ring, and a rubber backing ring is arranged on the inner wall of the cavity of the first metal backing ring; the inner wall of the sealing groove is provided with a metal backing ring II, the metal backing ring II is contacted with the rubber backing ring, and the metal backing ring II is contacted with the metal backing ring I. Under the condition of high temperature, the rubber backing ring can soften and melt and lead to its sealed effect to lose efficacy, the V-arrangement spring ring that is extrudeed at this moment can release resilience force to the right side, extrude the rubber backing ring that softens, and owing to be provided with a plurality of rectangular channels I and rectangular groove II on the V-arrangement spring ring, the holistic elasticity performance of V-arrangement spring ring can be progressively released by the rubber backing ring that melts, extrude the rubber backing ring that melts and make it pressed into the inside of a plurality of rectangular channels I and rectangular groove II and store, avoid melting rubber backing ring residue to leak into the passageway through the gap and cause the pollution to the medium, and in the flow state of medium at high pressure, can extrude the top ring through the spread groove inside, the top ring moves to the right side and extrudes metal backing ring I, make the rubber backing ring after melting, metal backing ring I contacts with metal backing ring II's right side boss and seals firmly, seamless connection has been reached. In a preferred embodiment, the extrusion assembly includes a top ring disposed on the inner wall of the seal groove, the top ring being located to the left of the metal backing ring. In a preferred embodiment, the inner wall of the valve cover is provided with a plurality of connecting grooves, and the connecting grooves are communicated with the sealing groove. In a preferred embodiment, a