CN215060259U

CN215060259U - Comb tooth type combined sealing precision flange

Info

Publication number: CN215060259U
Application number: CN202120682576.6U
Authority: CN
Inventors: 邓远成; 曾荣俊; 龚辉; 黎小林; 向凯
Original assignee: Huaneng Yarlung Tsangpo River Hydropower Development Investment Co Ltd
Current assignee: Huaneng Yarlung Tsangpo River Hydropower Development Investment Co Ltd
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-12-07
Anticipated expiration: 2031-04-02

Abstract

The utility model discloses a comb-tooth type combined seal precision flange sets up comb-tooth type structure on the sealed face of ring flange, comb-tooth type structure is: a plurality of annular convex edges are arranged on the sealing surface, and an annular groove is formed between every two adjacent annular convex edges; when connecting, the annular bead on one of them ring flange meshes with the annular groove on another ring flange, the utility model discloses under the condition that does not change the flange size, increase sealed area, extension medium leakage route, and the decompression function that the broach is sealed itself has for the medium seal effect is better, and the sealed pad of cooperation combination effectively fills the clearance between the broach, still can keep good sealing performance when single sealed inefficacy.

Description

Comb tooth type combined sealing precision flange

Technical Field

The utility model relates to a flange joint spare technical field especially relates to a comb tooth formula combination seal precision flange.

Background

At present, a common plane flange is generally used in industry, a rubber pad or a lead pad is filled in the middle of the flange, and the flange is tightly pressed by connecting bolts, so that the aim of sealing is fulfilled; because sealed the pad all can have certain compressive capacity, along with the increase of operating time, its compressive capacity also grow to lead to sealed the pad to warp, arouse the sealed pad of medium follow damage in the pipeline to leak, therefore need often inspect the pipeline flange, change sealed pad etc. has increaseed work load, especially to some spaces comparatively narrow and small, the place of being not convenient for overhaul has increased the maintenance degree of difficulty undoubtedly.

In addition, a chinese patent publication No. CN208634234U discloses a flange with a toothed end surface, which is disclosed in 22/3/2019, and includes a flange body, wherein a taper hole is coaxially formed in the flange body, an inner ring is disposed at the taper hole, the inner ring is a taper sleeve matched with the taper hole, a slot penetrating through a side wall of the inner ring is formed in the inner ring, the inner ring is detachably connected with the flange body, and an end surface tooth portion is disposed at a connecting end of the flange body. Above-mentioned practicality has solved the connecting piece processing cost height between automobile power output shaft and the transmission shaft and the difficult problem of dismouting, does not overcome sealed the pad deformation, arouses the problem that the sealed pad of medium follow damage in the pipeline leaks.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defect of the prior art, the utility model provides a comb-tooth type combined sealing precision flange, the purpose is how under the condition that does not change the flange size, improves the good sealing performance of flange.

In order to solve the technical problem, the utility model discloses a technical scheme is:

the utility model provides a comb-tooth formula combination seal precision flange, includes the ring flange, sets up comb-tooth formula structure on the sealed face of ring flange, comb-tooth formula structure is: a plurality of annular convex edges are arranged on the sealing surface, and an annular groove is formed between every two adjacent annular convex edges; when connected, the annular convex rib on one flange plate is engaged with the annular groove on the other flange plate.

The width of the annular groove is no more than 0.3mm (i.e. a small gap is allowed between the teeth). Install the sealed pad of one set of 1mm to 2mm thickness between two flange broach, compress tightly through flange joint bolt, compress tightly the in-process, sealed pad can take place slight deformation, nevertheless because form one seal groove between the broach, can control the deformation volume of sealed pad just, make it can fill the clearance between the broach completely compressing tightly the in-process to keep sealed deformation volume not changing for a long time.

The utility model has the advantages of it is following:

the utility model discloses comb tooth formula combination seal precision flange adopts broach seal structure cooperation two combination to seal the form, under the condition that does not change the flange size, increases sealed area, prolongs medium leakage path, and the decompression function that the broach is sealed itself has for the medium seal effect is more good, and the cooperation combination is sealed fills effectively in the clearance between to the broach, still can keep good sealing performance when single sealed inefficacy. The meshed comb teeth are mutually matched, so that the large external stress of the pipeline can be borne, the stress of the connecting bolt is reduced, and the maintenance period is prolonged.

Drawings

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

Fig. 2 is a schematic view of the three-dimensional structure of the two flange plates of the present invention.

The labels in the figure are: 1. sealing surface, 2, annular bead, 3, annular groove.

Detailed Description

The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to the following examples, which are conventional unless otherwise specified, and the materials can be commercially obtained from the disclosure without further specification.

As shown in fig. 1 and 2, fig. 1 is a schematic view of an improved structure of a flange; fig. 2 is a perspective cross-sectional view of the comb-teeth type engagement when two flanges are connected.

The utility model provides a comb-tooth type combination seal precision flange, includes the ring flange, sets up comb-tooth type structure on sealed face 1 of ring flange, and its comb-tooth type structure is: a plurality of annular convex ridges 2 are arranged on the sealing surface 1, and an annular groove 3 is formed between every two adjacent annular convex ridges; the annular convex rib 2 and the annular concave are matched to form a groove 3 comb-tooth structure. In use, the annular ridge 2 on one of the flanges engages the annular groove 3 on the other flange. The width of the annular groove is no more than 0.3mm (i.e. a small gap is allowed between the teeth).

Compared with the common planar flange, the comb-tooth type combined sealing precision flange increases the sealing contact area by using the comb tooth structure, and the medium leakage path is lengthened on the sealing surface with the same diameter, so that the medium leakage amount is reduced; structurally, the comb-tooth type combined sealing precision flange is composed of a comb tooth seal and a combined sealing gasket, a group of comb tooth structures in precise clearance fit are processed on two flange sealing surfaces respectively, a small gap (not more than 0.3mm) is allowed between the comb teeth, a set of sealing gasket with the thickness of 1mm to 2mm is installed between the two flange comb teeth, the sealing gasket is compressed through a flange connecting bolt, in the compression process, the sealing gasket can slightly deform, but a sealing groove is formed between the comb teeth, the deformation amount of the sealing gasket can be controlled exactly, the gap between the comb teeth can be completely filled in the compression process, and the deformation amount of the sealing gasket is kept unchanged for a long time. The adoption of the structure of multiple groups of sealing gaskets increases the reliability of the sealing gaskets, and even when part of the sealing gaskets are damaged and lose efficacy, other sealing gaskets still can provide good sealing effect. Because the sealing gasket can be made of various materials, the sealing gasket can be basically applied to pipeline connection in various fields.

Moreover, because the deformation is easily produced when the ordinary planar flange is installed, the flange often appears in later maintenance to the improper condition, easily leads to the connecting bolt atress to too big the appearance to damage when the pipeline vibration is great, and the accurate flange of comb-tooth formula combination seal adopts the broach structure, and when flange installation, intermeshing between the broach is on transferring to the broach with partly external stress that receives to the protecting connecting bolt.

Claims

1. The utility model provides a comb-tooth type combination seal precision flange, includes the ring flange, its characterized in that: set up comb-tooth formula structure on sealed face (1) of ring flange, comb-tooth formula structure is: a plurality of annular convex ridges (2) are arranged on the sealing surface, and an annular groove (3) is formed between every two adjacent annular convex ridges (2); when the connecting device is connected, the annular convex rib (2) on one flange plate is meshed with the annular groove (3) on the other flange plate.

2. The comb-tooth type combined sealing precision flange according to claim 1, characterized in that: the width of the annular groove (3) is not more than 0.3 mm.