CN216131570U

CN216131570U - Blind flange with double-seal structure

Info

Publication number: CN216131570U
Application number: CN202122900408.2U
Authority: CN
Inventors: 张志坚
Original assignee: Zhejiang Haibo Flange Manufacturing Co ltd
Current assignee: Zhejiang Haibo Flange Manufacturing Co ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-03-25
Anticipated expiration: 2031-11-24

Abstract

The utility model discloses a blind flange with a double-sealing structure, which comprises a chassis, wherein the chassis comprises a sealing column which is arranged separately relative to the chassis, the sealing column is provided with an inclined ring edge matched with a pipeline, a sealing gasket ring is fixed on the inclined ring edge, one end of the sealing column facing the inner side of the pipeline is provided with a concave buffer surface, the chassis is provided with a bolt fixing structure connected with the pipeline, and the chassis is also provided with a threaded hole which is arranged right opposite to the end surface of the sealing column facing the chassis and a mandril screw which passes through the threaded hole and abuts against the sealing column; the blind flange greatly improves the sealing reliability by arranging the double sealing structure and the ejector rod screw auxiliary sealing structure with the elastic part, and the flange has higher sealing performance and longer service life due to the design of the multiple sealing structures and the continuous elastic pressure sealing of the elastic part.

Description

Blind flange with double-seal structure

Technical Field

The utility model relates to the technical field of flanges, in particular to a blind flange with a double-sealing structure.

Background

A Flange (Flange), also known as a Flange collar or Flange. The flange is a part for connecting the shafts and is used for connecting pipe ends; there are also flanges on the inlet and outlet of the equipment for the connection between two pieces of equipment, such as reducer flanges. The flange connection or flange joint is a detachable connection which is formed by connecting a flange, a gasket and a bolt with each other to form a group of combined sealing structures. The pipeline flange is a flange for piping in a pipeline device, and is used on equipment to be an inlet and outlet flange of the equipment. The flanges are provided with holes, and the two flanges are tightly connected through bolts.

The flange is provided with a blind flange, also called a flange blind plate, is just called a flange cover, is a flange without holes in the middle, and is a flange connection mode for sealing a pipeline plug. In the industries of petroleum, chemical engineering, metallurgy, electric power, ships, machinery and the like, the blind flange plays the same roles of isolating and cutting off pipelines as the blind flange plays the same roles as an end socket, a pipe cap and a welding plug, and the blind flange seal is a detachable sealing device. However, the existing blind flange has poor corrosion resistance and impact resistance, and secondly, the flange is generally used not for temporary blocking but for a long-term isolation and cutting, so that the flange has certain continuous sealing performance.

SUMMERY OF THE UTILITY MODEL

In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides a blind flange with double seal structure, includes the chassis, the chassis includes the sealed post of relative chassis separation setting, sealed post be provided with pipeline assorted inclined plane ring limit, inclined plane ring edge is fixed with the sealing pad ring, sealed post is provided with the buffering face that is the concave surface towards the inboard one end of pipeline, be provided with the bolt fastening structure with the pipe connection on the chassis, just still be provided with on the chassis just to the screw hole that the terminal surface on sealed post set up towards the chassis and pass the ejector pin screw that the screw hole supported on sealed post.

As a further arrangement of the scheme, a sealing ring is further arranged at the position where the chassis abuts against the end face of the pipeline.

As a further configuration of the above aspect, the bolt fixing structure includes a bolt hole and a fixing bolt, and the fixing bolt includes a locknut and a screw.

As a further arrangement of the above scheme, a bolt fixing surface which is recessed relative to a surface abutting against the end surface of the pipeline is arranged on the chassis, and the bolt hole is arranged on the bolt fixing surface.

As a further arrangement of the scheme, the sealing gasket ring adopts a polytetrafluoroethylene gasket rubber gasket, and a polytetrafluoroethylene coating is arranged on the sealing column.

As a further arrangement of the above scheme, an elastic member is further arranged between the sealing post and the chassis, and two ends of the elastic member respectively abut against the bottom wall of the chassis for mounting the sealing post and the end face of the sealing post facing the chassis.

Has the advantages that: compared with the prior art, the blind flange disclosed by the utility model realizes double sealing, enhances the sealing performance of the blind flange, additionally provides an embodiment of elastic continuous sealing based on the application of a common blind flange to seal a pipeline for a long time, and enhances the fixing effect of a bolt surface by the height difference design of a bolt fixing surface of the single-channel sealing structure in the prior art, so that a fixing gap caused by uneven bolt surface processing is avoided, and the elastic anti-loosening effect is achieved by the deformation of bolt fastening caused by the gap, so that the possible loosening of a bolt caused by vibration caused by the flow of a medium in the pipeline is avoided.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.

Reference numerals: 1. a chassis; 2. sealing the column; 3. a bevel ring edge; 4. a sealing gasket ring; 5. a buffer surface; 6. a mandril screw; 61. an elastic member; 7. a bolt fixing structure; 71. bolt holes; 72. fixing the bolt; 721. a locknut; 722. a screw; 73. a bolt fixing surface; 8. a threaded bore.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflicting with each other.

Example 1: referring to fig. 1, a blind flange with a double sealing structure comprises a base plate 1, and is characterized in that: the chassis 1 comprises a sealing column 2 which is arranged separately relative to the chassis 1, the sealing column 2 is provided with an inclined plane annular edge 3 matched with a pipeline, a sealing gasket ring 4 is fixed on the inclined plane annular edge 3, the pipeline which is just opposite to the inclined plane annular edge 3 and the sealing gasket ring 4 is provided with a chamfer matching surface, the sealing performance is stronger when the sealing column 2 is subjected to larger pressure applied by the chassis 1 through the arrangement, one end of the sealing column 2 facing the inner side of the pipeline is provided with a buffer surface 5 which is concave, the buffer surface 5 is beneficial to transferring impact force to the periphery when being impacted by fluid, the impact resistance of the blind flange is improved, the chassis 1 is provided with a bolt fixing structure 7 connected with the pipeline, and the chassis 1 is also provided with a threaded hole 8 which is just opposite to the end surface of the sealing column 2 facing the chassis 1 and a mandril screw 6 which penetrates through the threaded hole 8 and is abutted to the sealing column 2, chassis 1 still is provided with sealing ring 9 with pipeline terminal surface department of offseting, and ejector pin screw 6 through the aforesaid setting is exerted pressure to sealed post 2 and is realized that 3 sealing ring cushions in inclined plane are 4 sealed inseparable one that form, and chassis 1 and pipeline terminal surface form the sealed cooperation of second way through the bolt fastening, realize the promotion to the sealed effect of blind plate flange, secondly the utility model discloses a flange sets up sealed post 2 and 1 separation of chassis, through the cooperation of sealed post 2 with the pipeline, promptly chassis 1 is incomplete carries out radial spacing to this sealed post 2 for it is self-adaptation to best sealed pressure-bearing position under the pressure of twice bolt, has avoided pipeline hole and bolt hole processing deviation to lead to the problem of sealed sideslip.

As a further arrangement of the above solution, the bolt fixing structure 7 includes a bolt hole 71 and a fixing bolt 72, and the fixing bolt 72 includes a locknut 721 and a screw 722.

In a further arrangement of the above arrangement, the chassis 1 is provided with a bolt fixing surface 73 recessed downward relative to a surface abutting against the end surface of the pipe, and the bolt hole 71 is provided on the bolt fixing surface 73.

As a further arrangement of the scheme, the sealing gasket ring 4 is a polytetrafluoroethylene gasket, and the sealing column 2 is provided with a polytetrafluoroethylene coating.

Through the setting of above-mentioned scheme, the terminal surface of the relative sealing ring 9 installation department of bolt facing 73 is recessed, promptly when chassis 1 and pipeline terminal surface counterbalance closely fixed back, bolt facing 73 still has the clearance with the pipeline terminal surface, and the bolt continues the fastening can produce certain deformation on chassis 1, promptly after flange mounting accomplishes, and this department metal deformation resets the power and will continuously be used in on the bolt, strengthens the frictional force of screw 722 and chassis 1 counterbalance terminal surface for it is difficult to produce unexpected not hard up because of external forces such as medium flow vibrations in the pipeline.

Example 2: referring to the blind flange shown in fig. 2, an elastic member 61 is further arranged between the sealing post 2 and the chassis 1, two ends of the elastic member 61 respectively abut against the bottom wall of the chassis 1 for mounting the sealing post 2 and the end surface of the sealing post 2 facing the chassis 1, and by the arrangement of the elastic member 61, the occurrence of gaps caused by the problems of aging and the like of the sealing gasket ring 4 in long-term use or medium pressure in a pipeline can be avoided based on the opposite elastic force of the sealing post 2 relative to the pipeline in the long-term sealing process, and the elastic member 61 can play a role in continuous elastic sealing to a certain extent.

Compared with the prior art, the blind flange disclosed by the utility model realizes double sealing, enhances the sealing performance of the blind flange, additionally provides an embodiment of elastic continuous sealing based on the application of a common blind flange to seal a pipeline for a long time, and enhances the fixing effect of a bolt surface by the height difference design of a bolt fixing surface of the single-channel sealing structure in the prior art, so that a fixing gap caused by uneven bolt surface processing is avoided, and the elastic anti-loosening effect is achieved by the deformation of bolt fastening caused by the gap, so that the possible loosening of a bolt caused by vibration caused by the flow of a medium in the pipeline is avoided.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A blind flange with a double sealing structure comprises a chassis (1), and is characterized in that: chassis (1) including sealed post (2) that relative chassis (1) separation set up, sealed post (2) be provided with pipeline assorted inclined plane ring limit (3), be fixed with sealing gasket ring (4) on inclined plane ring limit (3), sealed post (2) are provided with towards the inboard one end of pipeline and are concave buffering face (5), be provided with bolt fastening structure (7) with the pipe connection on chassis (1), just still be provided with on chassis (1) just to screw hole (8) of sealed post (2) towards the terminal surface setting of chassis (1) and pass ejector pin screw (6) that screw hole (8) support on sealed post (2).

2. A blind flange having a double seal structure according to claim 1 wherein: and a sealing ring (9) is also arranged at the position where the chassis (1) is abutted to the end surface of the pipeline.

3. A blind flange having a double seal structure according to claim 1 wherein: the bolt fixing structure (7) comprises a bolt hole (71) and a fixing bolt (72), and the fixing bolt (72) comprises a locknut (721) and a screw (722).

4. A blind flange having a double seal structure according to claim 3 wherein: the chassis (1) is provided with a bolt fixing surface (73) which is concave downwards relative to the surface abutting against the end surface of the pipeline, and the bolt hole (71) is arranged on the bolt fixing surface (73).

5. A blind flange having a double seal structure according to claim 1 wherein: the sealing gasket ring (4) is a polytetrafluoroethylene gasket, and a polytetrafluoroethylene coating is arranged on the sealing column (2).

6. A blind flange having a double seal structure according to claim 1 wherein: an elastic part (61) is further arranged between the sealing column (2) and the chassis (1), and two ends of the elastic part (61) respectively abut against the bottom wall of the chassis (1) for mounting the sealing column (2) and the end face of the sealing column (2) facing the chassis (1).