Flange connecting structure

Abstract

The utility model relates to the technical field of flanges, and discloses a flange connecting structure which comprises a first flange, a second flange, a first sealing piece and a second sealing piece. The first flange comprises a first connector part and a first connecting part, the first connector part is provided with a first flow channel, and the first connecting part is arranged around the first end of the first connector part; the second flange comprises a second connector part and a second connecting part, the second connector part is provided with a second flow channel, the second connecting part is arranged around the first end of the second connector part, and the end face of the first end of the second connector part is in sealed butt joint with the end face of the first end of the first connector part so that the second flow channel can communicate with the first flow channel; the first connecting part and the second connecting part are fixedly connected through a bolt; a first sealing piece and a second sealing piece are arranged between the first end face of the first connector part and the first end face of the second connector part, and at least one cooling liquid cavity is formed in the pipe wall of the first connector part. The flange connecting structure can improve the sealing reliability.

Description

Technical Field

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

[0002] At present, two flanges are usually connected by bolts, and the two flange joints are usually sealed by gaskets or sealing rings. However, when the medium temperature of the high-temperature sealing flange is 900℃, the bolts and gaskets often deform plastically, which will cause the medium to leak at the flange joint. Utility Model Content

[0003] The utility model provides a flange connection structure, which can improve the sealing reliability of the flange connection part.

[0004] In order to achieve the above object, the utility model provides the following technical solutions:

[0005] A flange connection structure comprises a first flange, a second flange, a first sealing member and a second sealing member;

[0006] The first flange includes a first interface portion and a first connecting portion, the first interface portion has a first flow channel, and the first connecting portion is arranged around a first end of the first interface portion;

[0007] The second flange includes a second interface portion and a second connection portion, the second interface portion has a second flow channel, the second connection portion is arranged around the first end of the second interface portion, the first end surface of the second interface portion is sealed and butted with the first end surface of the first interface portion, so that the second flow channel is connected with the first flow channel, and the first connection portion is fixedly connected with the second connection portion by bolts;

[0008] Among them, a first seal and a second seal are arranged between the first end surface of the first interface part and the first end surface of the interface part, the first seal, the second seal, the first interface part and the second interface part are coaxially arranged, the second seal surrounds the outside of the first seal, the tube wall of the first interface part has at least one cooling liquid cavity inside, and the outer wall of the first interface part has a cooling liquid inlet and a cooling liquid outlet connected to the cooling cavity.

[0009] Optionally, the tube wall of the first interface portion has at least two cooling liquid chambers arranged around the first flow channel.

[0010] Optionally, the at least two cooling liquid chambers are evenly distributed around the first flow channel.

[0011] Optionally, the first sealing member and the second sealing member are staggered along an arrangement direction of the first flange and the second flange.

[0012] Optionally, the first end face of the second interface part has a first annular groove coaxial with the second interface part, the first end face of the first interface part has an annular protrusion that cooperates with the first annular groove, the annular protrusion is inserted into the first annular groove, and the side wall of the annular protrusion is sealed with the side wall of the first annular groove, the first seal is located in the first annular groove, and the two sides of the first seal are respectively in sealing contact with the bottom of the first annular groove and the annular protrusion.

[0013] Optionally, the first end face of the first interface portion has a second annular groove arranged around the annular protrusion, the second seal is located in the second annular groove, and the two sides of the second seal are respectively in sealing contact with the bottom of the second annular groove and the first end face of the second interface portion.

[0014] Optionally, the first sealing member is a sealing gasket, and the second sealing member is a sealing ring.

[0015] Optionally, the sealing gasket is a graphite gasket or a vermiculite gasket.

[0016] The embodiment of the utility model provides a flange connection structure, including a first flange, a second flange, a first seal and a second seal. The first end face of the first interface portion of the first flange and the first end face of the second interface portion of the second flange are sealed and connected to each other, so that the first flow channel of the first flange is connected to the second flow channel of the second flange. The first connection portion of the first flange and the second connection portion of the second flange are fixedly connected by bolts, so that the first flange and the second flange are fixedly connected. Among them, since there is at least one cooling liquid cavity inside the tube wall of the first interface portion of the first flange, when high-temperature media flow through the first flow channel and the second flow channel, the temperature of sealing materials such as the first seal and the second seal and the bolt fastening portion can be reduced by injecting cooling liquid into the cooling cavity, thereby improving the sealing reliability of the flange connection portion, and two seals are formed between the first flange and the second flange by the first seal and the second seal, so that the sealing reliability is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A structural schematic diagram of a flange connection structure provided in an embodiment of the utility model.

[0018] icon:

[0019] 1-first flange; 11-first interface; 111-first flow channel; 112-cooling liquid chamber; 113-annular protrusion; 114-second annular groove; 12-second connecting part; 2-second flange; 21-second interface; 211-second flow channel; 212-first annular groove; 22-second connecting part; 3-first sealing member; 4-second sealing member; 5-bolt. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Please refer to Figure 1 , the utility model provides a flange connection structure, including a first flange 1, a second flange 2, a first sealing member 3 and a second sealing member 4;

[0022] The first flange 1 includes a first interface portion 11 and a first connecting portion. The first interface portion 11 has a first flow channel 111. The first connecting portion is arranged around a first end of the first interface portion 11.

[0023] The second flange 2 includes a second interface portion 21 and a second connection portion 2212, the second interface portion 21 has a second flow channel 211, the second connection portion 2212 is arranged around the first end of the second interface portion 21, the first end surface of the second interface portion 21 is sealed and connected with the first end surface of the first interface portion 11, so that the second flow channel 211 is connected with the first flow channel 111, and the first connection portion and the second connection portion 2212 are fixedly connected by bolts 5;

[0024] Among them, a first seal 3 and a second seal 4 are arranged between the first end surface of the first interface part 11 and the first end surface of the second interface part 21, the first seal 3, the second seal 4, the first interface part 11 and the second interface part 21 are coaxially arranged, the second seal 4 surrounds the outside of the first seal 3, and the inside of the tube wall of the first interface part 11 has at least one cooling liquid cavity 112, and the outer wall of the first interface part 11 has a cooling liquid inlet and a cooling liquid outlet connected to the cooling cavity.

[0025] The flange connection structure provided by the above utility model embodiment includes a first flange 1, a second flange 2, a first seal 3 and a second seal 4. The first end face of the first interface portion 11 of the first flange 1 and the first end face of the second interface portion 21 of the second flange 2 are sealed and connected to each other, so that the first flow channel 111 of the first flange 1 is connected to the second flow channel 211 of the second flange 2. The first connection portion of the first flange 1 and the second connection portion 2212 of the second flange 2 are fixedly connected by bolts 5, so that the first flange 1 is fixedly connected to the second flange 2. In this case, since at least one cooling liquid cavity 112 is provided inside the tube wall of the first interface portion 11 of the first flange 1, when a high-temperature medium flows through the first flow channel 111 and the second flow channel 211, the temperature of the sealing materials such as the first seal 3 and the second seal 4 and the fastening portion of the bolt 5 can be reduced by injecting cooling liquid into the cooling cavity, thereby improving the sealing reliability of the flange connection portion. In addition, two seals are formed between the first flange 1 and the second flange 2 by the first seal 3 and the second seal 4, so that the sealing reliability is higher.

[0026] The cooling liquid can be cold water or refrigerant, etc., which is not limited here and depends on the actual situation. The flange connection structure has high reliability and outstanding comprehensive performance and application space.

[0027] In the embodiment of the utility model, the tube wall of the first interface portion 11 has at least two cooling liquid chambers 112 arranged around the first flow channel 111, which can improve the cooling effect of the cooling liquid chamber 112 on the flange.

[0028] Specifically, the at least two cooling liquid chambers 112 are evenly distributed around the first flow channel 111, which can evenly cool the flange and improve the cooling effect. The shape of the cooling liquid chamber 112 is not limited here and is determined according to actual conditions.

[0029] In the embodiment of the utility model, the first seal 3 and the second seal 4 can be staggered along the arrangement direction of the first flange 1 and the second flange 2, which can improve the sealing reliability of the connection between the first flange 1 and the second flange 2.

[0030] Specifically, the first end face of the second connecting portion 11 has a first annular groove 212 coaxial with the second interface portion 21, and the first end face of the first interface portion 11 has an annular protrusion 113 that cooperates with the first annular groove 212. The annular protrusion 113 is inserted into the first annular groove 212, and the side wall of the annular protrusion 113 is sealed with the side wall of the first annular groove 212. The first sealing member 3 is located in the first annular groove 212, and the two sides of the first sealing member 3 are respectively in sealing contact with the bottom of the first annular groove 212 and the annular protrusion 113. Better sealing between the first flange 1 and the second flange 2 is achieved through the cooperation of the annular protrusion 113 on the first interface portion 11, the first annular groove 212 on the second interface portion 21, and the first sealing member 3.

[0031] Specifically, the first end face of the first interface portion 11 has a second annular groove 114 arranged around the annular protrusion 113, the second seal 4 is located in the second annular groove 114, and the two sides of the second seal 4 are respectively in sealing contact with the bottom of the second annular groove 114 and the first end face of the second interface portion 21. A supplementary sealing structure is achieved through the structure of the second seal 4 and the second annular groove 114, so that the first flange 1 and the second flange 2 are better sealed to avoid leakage of high-temperature media.

[0032] In the embodiment of the utility model, the first sealing member 3 may be a sealing gasket, and the second sealing member 4 may be a sealing ring, and the connection between the first flange 1 and the second flange 2 is sealed by two different sealing members. The first sealing member 3 and the second sealing member 4 may also be other combinations, which are not limited here and are determined according to actual conditions.

[0033] Specifically, the sealing gasket may be a graphite gasket or a vermiculite gasket, which has a simple structure and is easy to assemble.

[0034] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if these 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 these modifications and variations.

Claims

1. A flange connection structure, characterized in that: comprising a first flange, a second flange, a first sealing member and a second sealing member; The first flange includes a first interface portion and a first connecting portion, the first interface portion has a first flow channel, and the first connecting portion is arranged around a first end of the first interface portion; The second flange includes a second interface portion and a second connection portion, the second interface portion has a second flow channel, the second connection portion is arranged around the first end of the second interface portion, the first end surface of the second interface portion is sealed and butted with the first end surface of the first interface portion, so that the second flow channel is connected with the first flow channel, and the first connection portion is fixedly connected with the second connection portion by bolts; Among them, a first seal and a second seal are arranged between the first end surface of the first interface part and the first end surface of the second interface part, the first seal, the second seal, the first interface part and the second interface part are coaxially arranged, the second seal surrounds the outside of the first seal, the tube wall of the first interface part has at least one cooling liquid cavity inside, and the outer wall of the first interface part has a cooling liquid inlet and a cooling liquid outlet connected to the cooling liquid cavity.

2. The flange connection structure according to claim 1, characterized in that: The tube wall of the first interface portion has at least two cooling liquid chambers arranged around the first flow channel.

3. The flange connection structure according to claim 2, characterized in that: The at least two cooling liquid chambers are evenly distributed around the first flow channel.

4. The flange connection structure according to claim 1, characterized in that: The first sealing member and the second sealing member are staggered along an arrangement direction of the first flange and the second flange.

5. The flange connection structure according to claim 4, characterized in that: The first end face of the second interface portion has a first annular groove coaxial with the second interface portion, and the first end face of the first interface portion has an annular protrusion that cooperates with the first annular groove, the annular protrusion is inserted into the first annular groove, and the side wall of the annular protrusion is sealed with the side wall of the first annular groove, the first seal is located in the first annular groove, and the two sides of the first seal are respectively in sealing contact with the bottom of the first annular groove and the annular protrusion.

6. The flange connection structure according to claim 5, characterized in that: The first end face of the first interface portion has a second annular groove arranged around the annular protrusion, the second seal is located in the second annular groove, and the two sides of the second seal are respectively in sealing contact with the bottom of the second annular groove and the first end face of the second interface portion.

7. The flange connection structure according to any one of claims 1 to 6, characterized in that: The first sealing member is a sealing gasket, and the second sealing member is a sealing ring.

8. The flange connection structure according to claim 7, characterized in that: The sealing gasket is a graphite gasket or a vermiculite gasket.

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