CN223881933U

CN223881933U - A multi-seal flange

Info

Publication number: CN223881933U
Application number: CN202520810432.2U
Authority: CN
Inventors: 孔德秋; 孔令华
Original assignee: Dongtai Runfeng Flange Manufacturing Co ltd
Current assignee: Dongtai Runfeng Flange Manufacturing Co ltd
Priority date: 2025-04-27
Filing date: 2025-04-27
Publication date: 2026-02-06
Anticipated expiration: 2035-04-27

Abstract

This utility model discloses a multi-seal flange, including a first flange, a second flange movably connected to the lower end of the first flange, a first protective shell movably connected inside the first flange, and a second protective shell movably connected inside the second flange. The first flange has a first positioning hole, and a first positioning strip is fixedly connected to the side of the first protective shell. The second flange has a second positioning hole, and a second positioning strip is fixedly connected to the side of the second protective shell. The first flange has multiple first threaded holes, and the second flange has multiple second threaded holes. A nut is movably connected to the lower end of a bolt, and a triangular groove is formed on both the bolt and the nut, within which a triangular rod is movably connected. This structure effectively prevents media leakage from the flange connection surface and bolt connection, reducing the risk of leakage, facilitating quick installation, improving flange connection stability, and reducing maintenance costs.

Description

Multiple sealing flange

Technical Field

The utility model relates to the technical field of flanges, in particular to a multiple sealing flange.

Background

In industrial pipeline systems, flanges are used as key components for connecting pipelines and equipment, and the sealing performance of the flanges directly influences the operation safety and efficiency of the system. The traditional flange adopts a single sealing gasket, and under the complex working conditions of high temperature, high pressure, strong corrosion and the like, the sealing gasket is easy to age and deform, so that medium leakage is caused, material waste is caused, and safety accidents such as fire and explosion can be possibly caused.

Although the sealing structure is added to the part of improved flange, the problems of complex structure, difficult installation and maintenance, high replacement cost of sealing elements and the like exist. For example, the flange sealing structure disclosed in CN222702795U improves sealing effect by adding multiple sealing layers, but in the structure, assembly accuracy requirements between the sealing layers are extremely high, the installation process is complicated, and after long-term operation, local damage is easily caused between the multi-layer sealing structure due to uneven stress.

Disclosure of utility model

The utility model aims to provide a multiple sealing flange which can effectively prevent media from leaking from flange connection surfaces and bolt connection positions, reduce leakage risks, facilitate quick installation, improve flange connection stability and reduce maintenance cost.

In order to achieve the above purpose, the multiple sealing flange comprises a first flange, wherein the lower end of the first flange is movably connected with a second flange, the first flange is internally movably connected with a first protection shell, and the second flange is internally movably connected with a second protection shell.

According to the multiple sealing flange, a first positioning hole is formed in the first flange, a first positioning strip is fixedly connected to the side face of the first protection shell, the first positioning hole is movably connected to the first positioning strip, and a plurality of first mounting holes are formed in the first protection shell.

According to the multiple sealing flange, a second positioning hole is formed in the second flange, a second positioning strip is fixedly connected to the side face of the second protective shell, the second positioning strip is movably connected to the second positioning hole, and a plurality of second mounting holes are formed in the second protective shell.

According to the multiple sealing flange, a plurality of first threaded holes are formed in the first flange, a plurality of second threaded holes are formed in the second flange, and bolts are movably connected in the first threaded holes, the second threaded holes, the first mounting holes and the second mounting holes.

According to the multiple sealing flange, the upper end of the bolt is correspondingly provided with a cross groove, the upper end of the bolt is sleeved with a third sealing ring which is movably connected with the bolt, the lower end of the third sealing ring is movably connected with the first flange, and the lower end of the bolt is sleeved with a nut which is movably connected with the bolt.

According to the multiple sealing flange, a fourth sealing ring which is movably connected is sleeved at the lower end of the bolt, one end of the fourth sealing ring is movably connected with the nut, and the other end of the fourth sealing ring is connected with the second flange.

According to the multiple sealing flange, triangular grooves are formed in the bolts and the nuts, and triangular rods are movably connected in the triangular grooves.

According to the multiple sealing flange, the first flange and the second flange are provided with mounting grooves, the first sealing ring is movably connected in the mounting grooves, and the second sealing ring is movably connected in the mounting grooves.

The beneficial effects are that:

1. The first sealing ring and the second sealing ring are arranged in the mounting grooves of the first flange and the second flange, the third sealing ring and the fourth sealing ring are arranged at the bolt positions to form a plurality of sealing lines, leakage of media from the flange connection surface and the bolt connection position is effectively prevented, sealing reliability can be guaranteed under the working conditions of high temperature, high pressure and strong corrosion, and leakage risks are reduced.

2. The first protective shell and the second protective shell are matched with the flange positioning holes through positioning strips, so that the flange is convenient and quick to install, the triangular grooves of the bolts and the nuts are matched with triangular rods, loosening is prevented, the bolts are uniformly stressed by the porous positions, the installation process is simplified, the flange connection stability is improved, and the maintenance cost is reduced.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described below with reference to the drawings and examples;

FIG. 1 is a perspective view of a multiple seal flange according to the present utility model;

FIG. 2 is a top view of a multiple seal flange according to the present utility model;

FIG. 3 is a block diagram of a multiple seal flange fixture according to the present utility model;

FIG. 4 is a cross-sectional view of a multiple seal flange according to the present utility model;

fig. 5 is an enlarged view of fig. 4 a according to the present utility model.

Legend description:

1. A first flange; 2, a second flange, 3, a first sealing ring, 4, a first protective shell, 5, a bolt, 6, a cross groove, 7, a second sealing ring, 8, a second protective shell, 9, a triangular rod, 10, a nut, 11, a third sealing ring, 12, a fourth sealing ring, 13, a triangular groove, 14, a mounting groove, 15, a first threaded hole, 16, a second threaded hole, 17, a first mounting hole, 18, a second mounting hole, 19, a first positioning strip, 20, a first positioning hole, 21, a second positioning strip, 22 and a second positioning hole.

Detailed Description

Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.

Referring to fig. 1-5, the multiple sealing flange according to the embodiment of the utility model comprises a first flange 1, wherein a second flange 2 is movably connected to the lower end of the first flange 1, a first protective shell 4 is movably connected to the first flange 1, and a second protective shell 8 is movably connected to the second flange 2 to form an initial sealing barrier.

Specifically, a first positioning hole 20 is formed in the first flange 1, a first positioning strip 19 is fixedly connected to the side surface of the first protective shell 4, the first positioning hole 20 is movably connected to the first positioning strip 19, and a plurality of first mounting holes 17 are formed in the first protective shell 4.

Specifically, a second positioning hole 22 is formed in the second flange 2, a second positioning strip 21 is fixedly connected to the side face of the second protection shell 8, the second positioning strip 21 is movably connected to the second positioning hole 22, and a plurality of second mounting holes 18 are formed in the second protection shell 8, so that the bolts 5 are enabled to penetrate through and form stable connection.

Specifically, a plurality of first threaded holes 15 are formed in the first flange 1, a plurality of second threaded holes 16 are formed in the second flange 2, and bolts 5 are movably connected in the first threaded holes 15, the second threaded holes 16, the first mounting holes 17 and the second mounting holes 18, so that double sealing of joints of the bolts 5 is realized.

Specifically, the upper end of the bolt 5 is correspondingly provided with a cross groove 6, the upper end of the bolt 5 is sleeved with a third sealing ring 11 which is movably connected, the lower end of the third sealing ring 11 is movably connected with the first flange 1, and the lower end of the bolt 5 is sleeved with a nut 10 which is movably connected, so that double sealing of the joint of the bolt 5 is realized.

Specifically, the lower end of the bolt 5 is sleeved with a fourth sealing ring 12 which is movably connected, one end of the fourth sealing ring 12 is movably connected with a nut 10, and the other end of the fourth sealing ring 12 is connected with the second flange 2.

Specifically, triangular grooves 13 are formed in the bolts 5 and the nuts 10, triangular rods 9 are movably connected in the triangular grooves 13, and maintenance is convenient and efficient.

Specifically, the first flange 1 and the second flange 2 are provided with mounting grooves 14, the first sealing ring 3 is movably connected in the mounting grooves 14, and the second sealing ring 7 is movably connected in the mounting grooves 14.

Working principle:

The first flange 1 and the second flange 2 are connected by bolts 5. First, the first positioning strips 19 on the side surface of the first protective shell 4 are aligned with the first positioning holes 20 of the first flange 1, the first positioning is completed after the first positioning is inserted, and the second protective shell 8 is positioned with the second positioning holes 22 of the second flange 2 through the second positioning strips 21. Subsequently, the bolts 5 are sequentially passed through the first mounting holes 17 of the first protective case 4, the first screw holes 15 of the first flange 1, the second screw holes 16 of the second flange 2, and the second mounting holes 18 of the second protective case 8, and the nuts 10 are screwed, so that the first flange 1 and the second flange 2 are tightly adhered. In terms of sealing, the first sealing ring 3 and the second sealing ring 7 are respectively embedded into the mounting grooves 14 of the first flange 1 and the second flange 2, and are extruded and deformed during flange connection, so that gaps of contact surfaces of the flanges are filled, a first sealing line is formed, and leakage of a medium from a flange connection surface is effectively prevented. For the joint of the bolts 5, the third sealing ring 11 sleeved on the upper end of the bolts 5 is compressed and closely attached to the upper surface of the first flange 1 when the nuts 10 are screwed down, and the fourth sealing ring 12 at the lower end of the bolts 5 is closely attached to the second flange 2 under the pressure of the nuts 10 to form double sealing, so that leakage of a medium from the bolt holes is prevented, and the sealing performance is greatly improved. In order to prevent the bolt 5 from loosening during operation, triangular rods 9 are embedded in triangular grooves 13 formed in the surfaces of the bolt 5 and the nut 10. After the bolt 5 and the nut 10 are screwed, the triangular rod 9 is clamped into the triangular groove 13, so that the relative rotation of the bolt 5 and the nut 10 is limited, and the connection and the fastening can be kept even under the working conditions of pipeline vibration, pressure fluctuation and the like.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims

1. A multiple sealing flange comprises a first flange (1) and is characterized in that the lower end of the first flange (1) is movably connected with a second flange (2), a first protective shell (4) is movably connected in the first flange (1), and a second protective shell (8) is movably connected in the second flange (2).

2. The multiple sealing flange according to claim 1, wherein the first flange (1) is provided with a first positioning hole (20), a first positioning strip (19) is fixedly connected to a side surface of the first protective shell (4), the first positioning hole (20) is movably connected to the first positioning strip (19), and the first protective shell (4) is provided with a plurality of first mounting holes (17).

3. The multiple sealing flange according to claim 2, wherein the second flange (2) is provided with a second positioning hole (22), a second positioning bar (21) is fixedly connected to a side surface of the second protective shell (8), the second positioning bar (21) is movably connected to the second positioning hole (22), and the second protective shell (8) is provided with a plurality of second mounting holes (18).

4. A multiple sealing flange according to claim 3, wherein the first flange (1) is provided with a plurality of first threaded holes (15), the second flange (2) is provided with a plurality of second threaded holes (16), and bolts (5) are movably connected in the first threaded holes (15), the second threaded holes (16), the first mounting holes (17) and the second mounting holes (18).

5. The multiple sealing flange according to claim 4, wherein the upper end of the bolt (5) is correspondingly provided with a cross groove (6), the upper end of the bolt (5) is sleeved with a third sealing ring (11) which is movably connected, the lower end of the third sealing ring (11) is movably connected with the first flange (1), and the lower end of the bolt (5) is sleeved with a nut (10) which is movably connected.

6. The multiple sealing flange according to claim 5, wherein a fourth sealing ring (12) is movably connected to the lower end of the bolt (5), one end of the fourth sealing ring (12) is movably connected to the nut (10), and the other end of the fourth sealing ring (12) is connected to the second flange (2).

7. The multiple sealing flange according to claim 6, wherein triangular grooves (13) are formed in the bolts (5) and the nuts (10), and triangular rods (9) are movably connected in the triangular grooves (13).

8. The multiple sealing flange according to claim 1, wherein the first flange (1) and the second flange (2) are provided with mounting grooves (14), the mounting grooves (14) are movably connected with first sealing rings (3), and the mounting grooves (14) are movably connected with second sealing rings (7).