Raised face flange

Abstract

The utility model relates to the field of flange technology, and in particular to a raised face flange, which includes a flange body and a sealing boss, wherein the outer end face of the sealing boss is located outside the outer end face of the sealing boss, a first channel is arranged in the middle of the flange body, a second channel is arranged in the middle of the sealing boss, the first channel and the second channel are connected, the flange body and the sealing boss are detachably connected together, when the sealing performance of the sealing surface of the sealing boss decreases, the sealing boss can be replaced without replacing the valve, which significantly reduces the cost; the material of the sealing boss can be made of a material with better anti-corrosion performance, so as to improve the anti-corrosion ability of the sealing surface and extend the service life of the valve. In addition, the flange body and the sealing boss are detachably connected, and during transportation, the flange body and the sealing boss are transported separately, and then assembled at the installation site, which is convenient for transportation and use.

Description

Technical Field

[0001] The utility model relates to the technical field of flanges, in particular to a raised face flange. Background Art

[0002] The steel raised face flange of the valve is a commonly used connection method in pipeline connection. It is mainly used in industrial pipeline systems. Its sealing performance is directly related to the normal operation of the pipeline system. At present, the flange body and the sealing boss of the raised face flange are integrated, and the raised face flange is also integrated with the valve. The materials are the same, and the outer end face of the sealing boss is the sealing surface. The sealing surface height of the raised face flange is manufactured according to the standard, there is no corrosion margin, and the sealing surface is not allowed to be painted for corrosion protection, only anti-rust oil can be applied. When the sealing surface of the valve contacts the air in the working environment, the sealing surface will rust over time, resulting in a decrease in sealing performance and easy leakage. It is impossible to replace only the sealing boss, but only the valve can be replaced, which reduces the service life of the valve. Utility Model Content

[0003] The technical problem solved by the utility model is to provide a raised face flange with a replaceable sealing boss.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a raised face flange, comprising a flange body and a sealing boss, the outer end face of the sealing boss is located outside the outer end face of the sealing boss, a first channel is arranged in the middle of the flange body, a second channel is arranged in the middle of the sealing boss, the first channel and the second channel are connected, and the flange body and the sealing boss are detachably connected together.

[0005] Furthermore, the sealing boss includes a sealing portion and a connecting portion vertically connected together, and an outer surface of the connecting portion is provided with a connecting external thread;

[0006] The side wall of the first channel is provided with a connecting installation groove, and the side wall of the connecting installation groove is provided with a connecting internal thread. The connecting part is detachably arranged in the connecting installation groove through the thread, and the inner end surface of the connecting part is in contact with the outer end surface of the flange body.

[0007] Furthermore, a sealing waterline is arranged on the outer end surface of the sealing portion.

[0008] Furthermore, a first sealing structure is provided between the sealing portion and the flange body.

[0009] Furthermore, the first sealing structure includes a circle of sealing grooves arranged on the outer end surface of the flange body and a first sealing ring, and the first sealing ring is arranged in the sealing groove.

[0010] Furthermore, a second sealing structure is provided between the connecting portion and the flange body.

[0011] Furthermore, the second sealing structure includes a circle of sealing installation cavity and a second sealing ring arranged between the inner end surface of the connecting part and the bottom of the connecting installation groove, and the second sealing ring is arranged in the sealing installation cavity.

[0012] Furthermore, half of the sealing installation cavity is located in the connecting portion, and the other half of the sealing installation cavity is located in the bottom of the connecting installation groove.

[0013] Furthermore, a sealing member protection ring is arranged in the sealing installation cavity, and the sealing member protection ring is located outside the second sealing ring.

[0014] Furthermore, a mortise and tenon groove for fixing and disassembling tooling is provided on the side wall of the second channel.

[0015] The beneficial effects of the utility model are as follows: by detachably connecting the flange body and the sealing boss, when the sealing performance of the sealing surface of the sealing boss decreases, the sealing boss can be replaced without replacing the valve, which significantly reduces the cost; the material of the sealing boss can be made of a material with better anti-corrosion performance, which improves the anti-corrosion ability of the sealing surface and prolongs the service life of the valve. In addition, the flange body and the sealing boss are detachably connected, and during transportation, the flange body and the sealing boss are transported separately and assembled at the installation site, which is convenient for transportation and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 It is a schematic diagram of the structure of the flange body;

[0019] Figure 4 It is a schematic diagram of the structure of the sealing boss;

[0020] Marked as: flange body 1, first channel 11, connecting and mounting groove 12, sealing groove 13, sealing boss 2, second channel 21, sealing part 22, connecting part 23, tenon groove for fixing and disassembling tooling 24, first sealing ring 3, second sealing ring 4, sealing protection ring 5. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0022] The directions mentioned below are Figure 1 The position of each component in the figure is taken as the reference.

[0023] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the raised face flange of the utility model comprises a flange body 1 and a sealing boss 2, the outer end face of the sealing boss 2 is located outside the outer end face of the flange body 1, a first channel 11 is arranged in the middle of the flange body 1, and a second channel 21 is arranged in the middle of the sealing boss 2, the first channel 11 and the second channel 21 are connected, and the flange body 1 and the sealing boss 2 are detachably connected together.

[0024] exist Figure 1 In the figure, the outer end face of the flange body 1 refers to the left end face of the flange body 1, and the inner end face of the flange body 1 refers to the right end face of the flange body 1. The outer end face of the sealing boss 2 refers to the left end face of the sealing boss 2, and the inner end face of the sealing boss 2 refers to the right end face of the sealing boss 2. The outer end face of the sealing boss 2 is located outside the outer end face of the flange body 1, which means that the left end face of the sealing boss 2 is located to the left of the left end face of the flange body 1.

[0025] The first channel 11 and the second channel 21 constitute channels for the medium to flow through the raised face flange. In order to facilitate connection, bolt connection components are arranged around the flange body 1.

[0026] Specifically, in order to facilitate the detachable connection between the flange body 1 and the sealing boss 2 and ensure the connection strength during the connection, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a preferred structure of the sealing boss 2 is: the sealing boss 2 includes a sealing portion 22 and a connecting portion 23 connected vertically together, and the outer surface of the connecting portion 23 is provided with a connecting external thread; the side wall of the first channel 11 is provided with a connecting installation groove 12, and the side wall of the connecting installation groove 12 is provided with a connecting internal thread, and the connecting portion 23 is detachably arranged in the connecting installation groove 12 through a thread, and the inner end surface of the connecting portion 23 is in contact with the outer end surface of the flange body 1. The shapes of the sealing portion 22, the connecting portion 23 and the connecting installation groove 12 are all cylindrical, and the flange body 1 and the sealing boss 2 are connected by threads. When installing and disassembling, only the sealing boss 2 needs to be rotated to achieve the fixing and disassembly of the two, which is convenient for use.

[0027] In order to improve the sealing effect of the sealing surface of the sealing protrusion 2, a sealing waterline is provided on the outer end surface of the sealing portion 22.

[0028] Since the flange body 1 and the sealing boss 2 are detachably connected, in order to ensure the sealing between the flange body 1 and the sealing boss 2, a first sealing structure is provided between the sealing portion 22 and the flange body 1. The first sealing structure preferably includes a circle of sealing grooves 13 and a first sealing ring 3 provided on the outer end surface of the flange body 1. The first sealing ring 3 is provided in the sealing groove 13, and the first sealing ring 3 is preferably an O-ring. In order to ensure the installation and fixing effect of the first sealing ring 3 and prevent it from falling off, the sealing groove 13 is a dovetail groove.

[0029] In order to further improve the sealing performance between the flange body 1 and the sealing protrusion 2, a second sealing structure is provided between the connecting portion 23 and the flange body 1. The second sealing structure preferably includes a circle of sealing installation cavity provided between the inner end surface of the connecting portion 23 and the bottom of the connecting installation groove 12 and a second sealing ring 4, the second sealing ring 4 is provided in the sealing installation cavity, and the second sealing ring 4 is also preferably an O-ring. In order to improve the sealing effect of the second sealing ring 4, as shown in FIG. Figure 1 , Figure 2 Figure 3 and Figure 4 As shown, half of the sealing installation cavity is located in the connecting portion 23, and the other half of the sealing installation cavity is located in the bottom of the connecting installation groove 12. In order to reduce the possibility of damage to the second sealing ring 4, as shown in FIG. Figure 2 As shown, a sealing member protection ring 5 is arranged in the sealing installation cavity, and the sealing member protection ring 5 is located outside the second sealing ring 4 .

[0030] In order to facilitate the installation and disassembly of the flange body 1 and the sealing boss 2, a mortise and tenon groove 24 for fixing and disassembly tooling is provided on the side wall of the second channel 21. The mortise and tenon groove 24 for fixing and disassembly tooling can be provided at the left end of the side wall of the second channel 21 or the right end of the side wall of the second channel 21.

[0031] In summary, the flange body 1 and the sealing boss 2 are detachably connected together. When the sealing performance of the sealing surface of the sealing boss 2 decreases, the sealing boss 2 can be replaced without replacing the valve, which significantly reduces the cost. The material of the sealing boss 2 can be made of a material with better anti-corrosion performance to improve the anti-corrosion ability of the sealing surface and extend the service life of the valve. In addition, the flange body 1 and the sealing boss 2 are detachably connected. During transportation, the flange body 1 and the sealing boss 2 are transported separately and assembled at the installation site, which is convenient for transportation and use.

Claims

1. A raised face flange, comprising a flange body (1) and a sealing boss (2), wherein the outer end surface of the sealing boss (2) is located outside the outer end surface of the flange body (1), a first channel (11) is provided in the middle of the flange body (1), a second channel (21) is provided in the middle of the sealing boss (2), the first channel (11) and the second channel (21) are connected, and characterized in that: The flange body (1) and the sealing boss (2) are detachably connected together; The sealing boss (2) comprises a sealing portion (22) and a connecting portion (23) which are vertically connected together, and the outer surface of the connecting portion (23) is provided with a connecting external thread; the side wall of the first channel (11) is provided with a connecting installation groove (12), and the side wall of the connecting installation groove (12) is provided with a connecting internal thread; the connecting portion (23) is detachably arranged in the connecting installation groove (12) through the thread, and the inner end surface of the connecting portion (23) is in contact with the outer end surface of the flange body (1); A first sealing structure is provided between the sealing portion (22) and the flange body (1); a second sealing structure is provided between the connecting portion (23) and the flange body (1), the second sealing structure comprising a circle of sealing installation cavity provided between the inner end surface of the connecting portion (23) and the bottom of the connecting installation groove (12) and a second sealing ring (4), the second sealing ring (4) being provided in the sealing installation cavity, half of the sealing installation cavity being located in the connecting portion (23), and the other half of the sealing installation cavity being located in the bottom of the connecting installation groove (12); A mortise and tenon groove (24) for fixing and disassembling tooling is provided on the side wall of the second channel (21).

2. The raised face flange according to claim 1, characterized in that: A sealing waterline is arranged on the outer end surface of the sealing portion (22).

3. The raised face flange according to claim 1, wherein: The first sealing structure comprises a circle of sealing grooves (13) arranged on the outer end surface of the flange body (1) and a first sealing ring (3), wherein the first sealing ring (3) is arranged in the sealing groove (13).

4. The raised face flange according to claim 1, wherein: A sealing member protection ring (5) is arranged in the sealing installation cavity, and the sealing member protection ring (5) is located outside the second sealing ring (4).

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