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CN-224229480-U - Sealed fixed screw thread formula clamp flange structure

CN224229480UCN 224229480 UCN224229480 UCN 224229480UCN-224229480-U

Abstract

The utility model relates to the technical field of pipe fitting sealing connection, and discloses a sealing fixed threaded clamp flange structure which is used for sealing a connecting pipeline and comprises a clamp pipeline assembly, a threaded clamp fixing ring and a sealing gasket ring; the clamp pipeline assembly is provided with an inner taper annular surface, the threaded clamp fixing ring is provided with a V-shaped taper annular surface and threads, the end part of the clamp pipeline assembly is provided with threads matched with the threads, the sealing gasket ring is provided with a taper annular surface matched with the inner taper annular surface, and the clamp pipeline assembly is connected with the threads of the threaded clamp fixing ring through the threads. The inner surface and the outer surface of the flange joint are designed into tapered annular surfaces, the extrusion area of the clamp assembly and the flange joint is increased, the concentration of stress is reduced, the flange joint and the sealing ring can be effectively meshed together, and the sealing performance of a pipeline is ensured through the extrusion of the clamp assembly and the flange joint.

Inventors

  • ZHANG KAI
  • WANG DIANHU
  • HAO YULIANG
  • CHEN ZHONG

Assignees

  • 江苏朗盛石油装备有限公司

Dates

Publication Date
20260512
Application Date
20250702

Claims (7)

  1. 1. A threaded clamp flange structure for sealing and fixing a pipeline is characterized by comprising a clamp pipeline assembly (1), a threaded clamp fixing ring (2) and a sealing gasket ring (8), wherein the clamp pipeline assembly (1) is provided with an inner taper annular surface (9), the threaded clamp fixing ring (2) is provided with a V-shaped taper annular surface (7) and a first thread (3), the end part of the clamp pipeline assembly (1) is provided with a second thread (4) matched with the first thread (3), the sealing gasket ring (8) is provided with a taper annular surface (6) matched with the inner taper annular surface (9), the clamp pipeline assembly (1) is connected with the first thread (3) of the threaded clamp fixing ring (2) through the second thread (4), the taper annular surface (6) of the sealing gasket ring (8) is in sealing fit with the inner taper annular surface (9) of the clamp pipeline assembly (1), and the clamp pipeline assembly further comprises two clamps (5) and the clamp pipeline assembly is provided with a second taper annular surface (6) matched with the V-shaped taper annular surface (9) of the clamp pipeline assembly (1) so as to clamp the two clamp pipeline assembly (2) and the threaded clamp pipeline assembly (2) are connected with the threaded clamp bolt (2) through the second thread annular surface (11).
  2. 2. The seal-fixed threaded clamp flange structure according to claim 1, wherein the inner taper annular surface (9) of the clamp pipeline assembly (1), the V-shaped taper annular surface (7) of the threaded clamp fixing ring (2) and the taper annular surface (6) of the seal gasket ring (8) are all provided with circular arc-shaped 23-degree angles.
  3. 3. A seal-fixed threaded clamp flange structure according to claim 1, characterized in that the edge of the tapered annular surface (6) of the gasket ring (8) has a rounded corner R1.5.
  4. 4. A screw-type clamp flange structure for sealing and fixing according to claim 1, characterized in that the sealing gasket ring (8) is made of 316 stainless steel material.
  5. 5. A screw-type clamp flange structure for sealing fixation according to claim 1, characterized in that the number of the clamps (5) is 2, and two clamps (5) symmetrically clamp the screw-type clamp fixing ring (2) through a stud (10) and a nut (11).
  6. 6. The sealed and fixed threaded clamp flange structure according to claim 1, wherein the two threaded clamp fixing rings (2) are respectively and fixedly connected with the end parts of the pipelines to be connected through threads to form a sealed structure.
  7. 7. A seal-fixed threaded clamp flange structure according to claim 1, characterized in that the tapered annular surface of the clamp (5) and the V-shaped tapered annular surface (7) of the threaded clamp fixing ring (2) form extrusion seal fit to increase the contact area and reduce stress concentration.

Description

Sealed fixed screw thread formula clamp flange structure Technical Field The utility model relates to the technical field of pipe fitting sealing connection, in particular to a sealing fixed threaded clamp flange structure. Background Pipeline transportation is widely applied to the transportation of flowable media such as water, fuel oil, fuel gas and the like, for example, tap water pipelines, natural gas pipelines, and working medium pipelines in compressors and the like. The pipeline transportation has the advantages of low cost, good continuity, high safety and the like. Because of the limitation of the practical conditions such as the transportation path, the transportation distance and the like, the pipeline transportation is difficult to be completed by a single pipe fitting, and the corresponding pipe fitting is required to regulate and control the transportation task in the pipeline transportation process, so that a pipeline transportation system is often formed by connecting a plurality of pipe fittings and a plurality of pipe fittings. The connection mode between the pipe fittings not only ensures the tightness and the safety of the pipeline, but also saves the cost and is convenient to install. The common method for flange connection in petroleum, natural gas, high-temperature and high-pressure water and other pipelines at present comprises bolt fastening and welding. The bolt connection ensures that the flange is uniformly stressed, the sealing is ensured, the requirements on the position accuracy of the corresponding threaded holes on the flange and the flange are higher, and the welding has lower requirements on the processing accuracy of the flange structure than the threaded connection, but the welding is generally unrepeatable and has poor utilization rate. In addition, the flange is usually completed by a sealing gasket between two flange plates, so that leakage is easy to occur, and the flange is particularly used in a high-pressure pipeline. Therefore, a screw-type clamp flange structure for sealing and fixing is provided for solving the problem. Disclosure of utility model The utility model aims to provide a screw thread type clamp flange structure for sealing and fixing, which solves the problems in the background technology. The technical scheme is that the threaded clamp flange structure is used for sealing a connecting pipeline and comprises a clamp pipeline assembly, a threaded clamp fixing ring and a sealing gasket ring, wherein the clamp pipeline assembly is provided with an inner taper annular surface, the threaded clamp fixing ring is provided with a V-shaped taper annular surface and a first thread, the end part of the clamp pipeline assembly is provided with a second thread matched with the first thread, the sealing gasket ring is provided with a taper annular surface matched with the inner taper annular surface, the clamp pipeline assembly is connected with the first thread of the threaded clamp fixing ring through the second thread, the taper annular surface of the sealing gasket ring is in sealing fit with the inner taper annular surface of the clamp pipeline assembly, and the clamp pipeline assembly further comprises two clamps, wherein the two clamps are fixedly connected through a double-head bolt and a nut so as to clamp the threaded clamp fixing ring. Preferably, the inner taper annular surface of the clamp pipeline assembly, the V-shaped taper annular surface of the threaded clamp fixing ring and the taper annular surface of the sealing gasket ring are all provided with arc-shaped 23-degree angles. Preferably, the edge of the taper annular surface of the sealing gasket ring is provided with a round angle R1.5. Preferably, the gasket ring is made of 316 stainless steel material. Preferably, the number of the clamps is 2, and two clamps symmetrically clamp the threaded clamp fixing ring through the stud bolts and the nuts. Preferably, the two threaded clamp fixing rings are respectively and fixedly connected with the end parts of the pipelines to be connected through threads to form a sealing structure. Preferably, the tapered annular surface of the clamp is in extrusion sealing fit with the V-shaped tapered annular surface of the threaded clamp fixing ring, so that the contact area is increased and the stress concentration is reduced. The utility model provides a screw thread type clamp flange structure for sealing and fixing. The screw thread type clamp flange structure for sealing and fixing has the following beneficial effects: The inner surface and the outer surface of the flange joint are designed into taper annular surfaces, the extrusion area of the flange joint and the clamp assembly is increased, the concentration of stress is reduced, the flange joint and the sealing ring can be effectively meshed together, and the sealing performance of a pipeline is ensured through the extrusion of the clamp assembly and the flange joint. Drawings FIG. 1 is a schematic c