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CN-224229510-U - Vacuum bellows seal structure

CN224229510UCN 224229510 UCN224229510 UCN 224229510UCN-224229510-U

Abstract

The utility model relates to the technical field of corrugated pipes, in particular to a vacuum corrugated pipe sealing structure, which comprises a pipe body and a flange plate fixedly connected with the end part of the pipe body, wherein the pipe body is fixedly connected with the flange plate, a sealing groove is formed in the side surface of the flange plate, a sealing ring is arranged in the sealing groove, a disc spring is fixedly arranged in the sealing groove, the other end of the disc spring is fixedly connected with a sealing plate, a limiting ring is arranged at the position, close to a notch, of the sealing groove, a bulge part corresponding to the limiting ring is arranged at one end, close to the sealing groove, of the sealing ring, one end, close to the disc spring, of the bulge part is tightly attached to the sealing plate, the sealing ring is hollow, and a bolt hole is formed in the flange plate. The sealing ring has the beneficial effects that an area for the expansion of the sealing ring is reserved at the joint of the flange plate and the sealing ring, and the sealing ring can be ensured not to displace when expanding through the limiting ring, so that a sufficient sealing effect is ensured.

Inventors

  • ZHU XIHUA
  • XU LIN

Assignees

  • 鑫熠海科技(南通)有限公司

Dates

Publication Date
20260512
Application Date
20250627

Claims (5)

  1. 1. The vacuum corrugated pipe sealing structure comprises a pipe body (1) and a flange plate (2) fixedly connected with the end part of the pipe body (1), and is characterized in that the pipe body (1) is fixedly connected with the flange plate (2), a sealing groove (3) is formed in the side surface of the flange plate (2), and a sealing ring (4) is arranged in the sealing groove (3); A disc spring (5) is fixedly arranged in the sealing groove (3), the other end of the disc spring (5) is fixedly connected with a sealing plate (6), a limiting ring (7) is arranged at the position, close to the notch, of the sealing groove (3), a bulge (8) corresponding to the limiting ring (7) is arranged at one end, close to the sealing groove (3), of the sealing ring (4), wedge-shaped inclined planes are formed in the inner side and the outer side of the bulge (8), and one end, close to the disc spring (5), of the bulge (8) is tightly attached to the sealing plate (6); The inside of the sealing ring (4) is hollow, and bolt holes (9) are formed in the flange plate (2).
  2. 2. The vacuum bellows sealing structure of claim 1, wherein the sealing groove (3) is divided into an inner ring groove and an outer ring groove, a partition wall is arranged between the inner ring groove and the outer ring groove, and the inner ring groove and the outer ring groove are both positioned on the same side of the flange plate (2).
  3. 3. The vacuum bellows sealing structure of claim 2, wherein the number of the limiting rings (7) is not less than four, the number of the protruding portions (8) is not less than two, the limiting rings (7) are wrapped on the inner annular wall and the outer annular wall of the protruding portions (8), the outer wall of the limiting rings (7) is attached to the groove wall of the sealing groove (3), a wedge groove is formed in one side of the inner wall of the limiting rings, the wedge groove is of a trapezoid structure with the upper part wide and the lower part narrow, and an expansion gap is reserved between the wedge groove and the outer wall or the inner wall of the protruding portions (8).
  4. 4. The vacuum bellows sealing structure of claim 3, wherein the disc spring (5) is made of metal, and the sealing ring (4), the protruding portion (8) and the sealing plate (6) are made of rubber.
  5. 5. The vacuum bellows sealing structure according to claim 4, wherein the stop collar (7), the flange plate (2) and the pipe body (1) are made of metal materials with the same material.

Description

Vacuum bellows seal structure Technical Field The utility model relates to the technical field of corrugated pipes, in particular to a vacuum corrugated pipe sealing structure. Background The corrugated pipe is a tubular elastic sensitive element formed by connecting foldable corrugated sheets along the folding and stretching directions, and mainly comprises a metal corrugated pipe, a corrugated expansion joint, a corrugated heat exchange pipe, a metal hose and the like. The metal corrugated pipe is mainly applied to the functions of compensating thermal deformation of pipelines, damping, absorbing sedimentation deformation of pipelines and the like, is widely applied to industries of conveying gas, liquid and the like in petrochemical, aerospace, chemical, electric power, metallurgy and ultra-high vacuum environments, is generally made of stainless steel materials, and is simple to manufacture and low in cost. However, in use, the conventional vacuum bellows discovers that the sealing ring arranged in the conventional vacuum bellows can expand or shrink under the condition of thermal expansion and contraction, so that the sealing effect of the sealing ring is greatly reduced, the overhaul and maintenance times with larger post-engineering quantity are correspondingly increased, and the practical use effect is poor. Disclosure of utility model The utility model aims to provide a vacuum corrugated pipe sealing structure for solving the problems in the background art. In order to achieve the above purpose, the vacuum bellows sealing structure comprises a pipe body and a flange plate fixedly connected with the end part of the pipe body, wherein the pipe body is fixedly connected with the flange plate, a sealing groove is formed in the side surface of the flange plate, and a sealing ring is arranged in the sealing groove; The sealing groove is internally and fixedly provided with a disc spring, the other end of the disc spring is fixedly connected with a sealing plate, a limiting ring is arranged at the position, close to the notch, of the sealing groove, a bulge corresponding to the limiting ring is arranged at one end, close to the sealing groove, of the sealing ring, wedge-shaped inclined planes are arranged on the inner side and the outer side of the bulge, and one end, close to the disc spring, of the bulge is tightly attached to the sealing plate; the inside of sealing ring is hollow, the bolt hole has been seted up on the ring flange. Further, the seal groove is divided into an inner ring groove and an outer ring groove, a partition wall is arranged between the inner ring groove and the outer ring groove, and the inner ring groove and the outer ring groove are both positioned on the same side of the flange plate. Further, the number of the limiting rings is not less than four, the number of the protruding portions is not less than two, the limiting rings are wrapped on the inner annular wall and the outer annular wall of the protruding portions, the outer wall of the limiting rings is attached to the groove wall of the sealing groove, a wedge groove is formed in one side of the inner wall of the limiting rings, the wedge groove is of a trapezoid structure with the upper part wide and the lower part narrow, and an expansion gap is reserved between the wedge groove and the outer wall or the inner wall of the protruding portions. Further, the disc spring is made of metal materials, and the sealing ring, the protruding portion and the sealing plate are made of rubber materials. Furthermore, the stop collar, the flange plate and the pipe body are made of metal materials with the same material. Compared with the prior art, the utility model has the beneficial effects that: the sealing groove is internally provided with a disc spring and a sealing plate, when the sealing ring and the protruding part expand in the axial direction, the protruding part can extrude the sealing plate, and the sealing plate further extrudes the disc spring to compress the sealing plate, so that a sufficient expansion area is provided for the expansion of the sealing ring and the protruding part; The inner side of the stop collar is provided with a wedge groove, an expansion gap is reserved between the wedge groove and the outer wall or the inner wall of the protruding part, the protruding part can deform inwards or outwards when expanding, enough space is provided, and simultaneously, the outer wall and the inner wall of the protruding part are both provided with inclined planes matched with the stop collar, so that the protruding part expands or contracts outwards or inwards simultaneously when deforming, the position of the main body of the protruding part does not change, and a good sealing effect is still provided. Drawings FIG. 1 is a schematic diagram of the structure of the present utility model; FIG. 2 is a cross-sectional view of the structure of the present utility model; FIG. 3 is a schematic view of the internal structure