CN212056251U - Bolt flange sealing device for fire-fighting collecting pipe - Google Patents
Bolt flange sealing device for fire-fighting collecting pipe Download PDFInfo
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- CN212056251U CN212056251U CN202020055350.9U CN202020055350U CN212056251U CN 212056251 U CN212056251 U CN 212056251U CN 202020055350 U CN202020055350 U CN 202020055350U CN 212056251 U CN212056251 U CN 212056251U
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Abstract
A bolt flange sealing device for a fire-fighting collecting pipe comprises a straight neck pipe, a flange, a gasket, a bolt and a connecting pipe; the straight neck pipe is arranged above the flange and connected with the flange; the gasket is arranged in a sealing surface between the left flange plate and the right flange plate, and the left flange plate and the right flange plate are fastened through the bolts; the connecting pipe is arranged below the flange and is in butt welding connection with the fire-fighting collecting pipe. A bolt flange sealing device for fire control pressure manifold, with fire control pressure manifold butt welding, non-deformable, the flexibility is high, simple structure, the flexibility is high, convenient inspection, tear open and trade, the maintenance of being convenient for, sealing performance is good, application prospect is extensive.
Description
Technical Field
The utility model relates to a bolt flange technical field, concretely relates to bolt flange sealing device for fire control pressure manifold.
Background
The fire-fighting collecting main is a pipeline from the fire extinguishing agent storage bottle to all parts between the selection valves (excluding the pressure hose) and is used for collecting the fire extinguishing agent released by each fire extinguishing agent storage bottle. The fire-fighting collecting pipe is formed by welding high-quality seamless steel pipes which are thickened at national standard by argon arc welding and then hot galvanizing inside and outside, and has uniform inner and outer plating layers and attractive appearance. Simultaneously, for installation convenience, a safety relief valve interface is reserved on the fire-fighting collecting pipe according to needs.
The bolt flange is an important component in a fire-fighting header system. The bolt flange connection structure is the most main connection form in process equipment and pipelines, and the connection structure is influenced by medium pressure, additional load, vibration environment and the like under the operation working condition, the vibration characteristic of the structure can be changed, and leakage is the main reason of structure failure.
Thus, the bolted flange seals act as the primary static seals at the releasable connections, such as connecting pipes, and prevent the escape of liquids or gases through these connections. While bolted flange joints do not leak as much as seals for vegetable shafts, valve stems, agitators, etc., they are much more numerous than these, and thus they are a major source of process equipment leakage. Environmental pollution and product loss caused by leakage make the importance of the bolt flange sealing device self-evident.
Because the working condition that fire control pressure manifold was located is very complicated, and the fluid medium scope of containing is fairly extensive, in order to prevent that liquid or gas from leaking out through these junctions, bolt flange sealing device need further improve sealing performance.
The Chinese patent application No. CN201210419078.8 discloses a design method of a bolt flange connection structure of a homogeneous gasket, provides a design method of a bolt flange connection structure using the homogeneous gasket as a sealing element, gives a calculation example and carries out experimental verification, and is not designed for a fire-fighting collecting pipe.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in order to overcome the defects, the utility model aims to provide a bolt flange sealing device for fire control pressure manifold, simple structure and good sealing performance.
The technical scheme is as follows: a bolt flange sealing device for a fire-fighting collecting pipe comprises a straight neck pipe, a flange, a gasket, a bolt and a connecting pipe; the straight neck pipe is arranged above the flange and connected with the flange; the gasket is arranged in a sealing surface between the left flange plate and the right flange plate, and the left flange plate and the right flange plate are fastened through the bolts; the connecting pipe is arranged below the flange and is in butt welding connection with the fire-fighting collecting pipe.
Bolt flange sealing device, with fire control pressure manifold butt welding, non-deformable, bolt flange sealing device, sealed packing force that produces through gasket, sealed face and gasket and warp is realized, the packing force is applyed through fastening bolt, sealing performance is good.
Further, in the bolt flange sealing device for the fire-fighting collecting pipe, the gasket comprises a metal outer ring, a middle ring, a metal inner ring and a gasket main body, wherein the metal outer ring, the middle ring and the metal inner ring are assembled together and are arranged at two ends of the gasket main body; the intermediate ring is arranged between the metal outer ring and the metal inner ring.
The gasket is assembled between the sealing surfaces of the left flange and the right flange, the metal inner ring and the metal outer ring contain and support the middle ring, and the metal outer ring simultaneously has the effect of limiting the compression of the gasket. Under the assembling working condition, pretightening force is applied to the bolt, the sealing surface of the flange is firstly contacted with the middle ring of the gasket, and the bolt force is completely acted on the middle ring. Along with the increase of pretightening force, the flange sealing surface is slowly contacted with the gasket metal ring.
Further, in the bolt flange sealing device for the fire-fighting collecting pipe, the intermediate ring is one of an asbestos ring, a graphite ring and an FTFE ring.
Further, in the bolt flange sealing device for the fire-fighting collecting pipe, the intermediate ring is a graphite ring.
The middle ring is sealed by a graphite ring, because the graphite material is soft and has good heat resistance and strong resistance to radiation, and meanwhile, the graphite elasticity performance is the best in asbestos, FTFE and graphite materials, and the gasket is usually applied to occasions with pressure fluctuation and high sealing requirements.
Further, in the bolt flange sealing device for the fire-fighting collecting pipe, a chamfer at the joint of the straight neck pipe and the flange is an arc angle.
Further, in the bolt flange sealing device for the fire-fighting collecting pipe, the radius of the arc angle is 8 mm.
Further, in the bolt flange sealing device for the fire-fighting collecting pipe, the chamfer angle and the horizontal plane form an angle of 115 degrees.
The utility model has the advantages that: a bolt flange sealing device for fire control pressure manifold, with fire control pressure manifold butt welding, non-deformable, the flexibility is high, simple structure, the flexibility is high, convenient inspection, tear open and trade, the maintenance of being convenient for, sealing performance is good, application prospect is extensive.
Drawings
Fig. 1 is a schematic structural view of a bolt flange sealing device for a fire-fighting collecting pipe according to the present invention;
fig. 2 is a schematic view of the flange, gasket and bolt connection of the bolt flange sealing device for a fire-fighting collecting pipe according to the present invention;
fig. 3 is a schematic structural diagram of a gasket of the bolt flange sealing device for a fire-fighting collecting pipe according to the present invention;
in the figure: the fire-fighting pipeline comprises a straight neck pipe 1, a chamfer 11, a flange 2, a left flange 21, a right flange (22, a sealing surface 23, a gasket 3, a metal outer ring 31, a middle ring 32, a metal inner ring 33, a gasket main body 34, a bolt 4, a connecting pipe 5 and a fire-fighting collecting pipe 6.
Detailed Description
The invention will be further elucidated with reference to the accompanying figures 1, 2, 3 and the embodiments.
The bolt flange sealing device for the fire-fighting collecting main with the structure shown in fig. 1 and 2 comprises a straight neck pipe 1, a flange 2, a gasket 3, bolts 4 and a connecting pipe 5; the straight neck pipe 1 is arranged above the flange 2 and connected with the flange 2; the flange 2 comprises a left flange plate 21 and a right flange plate 22, the gasket 3 is arranged in a sealing surface 23 between the left flange plate 21 and the right flange plate 22, and the left flange plate 21 and the right flange plate 22 are fastened through the bolts 4; the connecting pipe 5 is installed below the flange 2 and is connected with the fire-fighting collecting pipe 6 in a butt welding mode.
In addition, the gasket 3 comprises a metal outer ring 31, a middle ring 32, a metal inner ring 33 and a gasket main body 34, wherein the metal outer ring 31, the middle ring 32 and the metal inner ring 33 are assembled together and are arranged at two ends of the gasket main body 34; the intermediate ring 32 is installed between the metal outer ring 31 and the metal inner ring 33.
In addition, the intermediate ring 32 is one of an asbestos ring, a graphite ring, and an FTFE ring. Further, the intermediate ring 32 is a graphite ring.
In addition, the chamfer 11 at the joint of the straight neck pipe 1 and the flange 2 is a circular arc angle. The radius of the arc angle is 8 mm. The chamfer 11 is 115 ° from the horizontal.
Examples
The structural basis is as shown in FIGS. 1 to 3.
The bolt flange sealing device for the fire-fighting collecting pipe of the utility model is characterized in that the connecting pipe 5 is in butt welding connection with the fire-fighting collecting pipe 6, the sealing of the bolt flange sealing device is realized by the pressing force of deformation generated by the gasket 3, the sealing surface 23 and the gasket 3, and the pressing force is applied by the fastening bolt 4; the gasket 3 is fitted between the sealing surfaces 23 of the left and right flanges 21, 22, and the metal inner and outer rings 32, 31 enclose and support the intermediate ring 33, the metal outer ring 31 at the same time limiting the effect of the compression of the gasket 3. In the assembled state, a pretension is applied to the bolts 4, the sealing surface 23 of the flange 2 is first in contact with the intermediate ring 33 of the gasket 3, and the bolt forces are all applied to the intermediate ring 33. Along with the increase of pretightening force, the sealing surface 23 of the flange 2 is slowly contacted with the metal rings 31 and 32 of the gasket 3, and the sealing performance is good.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present invention does not need to describe any combination of the features.
In addition, the embodiments of the present invention can be arbitrarily combined with each other, and the same shall be regarded as the disclosure of the present invention as long as the idea of the present invention is not violated.
Claims (6)
1. A bolt flange sealing device for a fire-fighting collecting pipe is characterized by comprising a straight neck pipe (1), a flange (2), a gasket (3), bolts (4) and a connecting pipe (5); the straight neck pipe (1) is arranged above the flange (2) and is connected with the flange (2); the flange (2) comprises a left flange plate (21) and a right flange plate (22), the gasket (3) is arranged in a sealing surface (23) between the left flange plate (21) and the right flange plate (22), and the left flange plate (21) and the right flange plate (22) are fastened through the bolts (4); the connecting pipe (5) is installed below the flange (2) and is in butt welding connection with the fire-fighting collecting pipe (6).
2. Bolt flange sealing arrangement for fire fighting collecting main according to claim 1, characterized by that the gasket (3) comprises a metal outer ring (31), a middle ring (32), a metal inner ring (33), a gasket body (34), the metal outer ring (31), the middle ring (32), the metal inner ring (33) are assembled together and mounted at both ends of the gasket body (34); the intermediate ring (32) is mounted between the metal outer ring (31) and the metal inner ring (33).
3. Bolt flange sealing arrangement for fire fighting collecting main according to claim 2, characterized by the intermediate ring (32) being one of an asbestos ring, a graphite ring, an FTFE ring.
4. Bolted flange seal for fire fighting manifolds according to claim 3, characterized in that said intermediate ring (32) is a graphite ring.
5. The bolt flange sealing device for a fire fighting collecting pipe according to claim 1, characterized in that the chamfer (11) at the joint of the straight neck pipe (1) and the flange (2) is a circular arc angle, and the radius of the circular arc angle is 8 mm.
6. Bolted flange seal for fire fighting manifolds according to claim 5, characterized in that said chamfer (11) is at 115 ° to the horizontal plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020055350.9U CN212056251U (en) | 2020-01-10 | 2020-01-10 | Bolt flange sealing device for fire-fighting collecting pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020055350.9U CN212056251U (en) | 2020-01-10 | 2020-01-10 | Bolt flange sealing device for fire-fighting collecting pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212056251U true CN212056251U (en) | 2020-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020055350.9U Active CN212056251U (en) | 2020-01-10 | 2020-01-10 | Bolt flange sealing device for fire-fighting collecting pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212056251U (en) |
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2020
- 2020-01-10 CN CN202020055350.9U patent/CN212056251U/en active Active
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