CN205908914U - Formula flange is embraced to cartridge about high temperature resistant - Google Patents

Abstract

The utility model relates to the design field of pipeline connection components, in particular to a high-temperature-resistant left and right plug-in hugging flange; The shape is "U" and is an axisymmetric structure with a left plug-in half flange and a right plug-in half flange. There is a ring groove on the inner ring of one of the flange faces of the flange, and the ring groove is connected with the pipe end. The boss structure of the head is matched, and there is a inferior arc-shaped boss on the left and right half flanges. By matching the boss with the "U"-shaped opening end to achieve complementary shapes, a complete flange body is formed. The body is also provided with an outer ring high-temperature gasket. The high-temperature-resistant left and right plug-in hugging flanges can be split into two and a half flanges, which can realize reliable docking of the two boss structure pipes without damage or modification, and can be realized through high-temperature gaskets. Resistant to high temperature and high pressure environment, and easy to disassemble.

Description

A high temperature resistant left and right plug-in hugging flange

technical field

The utility model relates to the design field of pipeline connection components, in particular to a high-temperature resistant left and right plug-in hugging flange.

Background technique

At present, in the fields of aviation and aerospace, resistance elements such as heat exchangers and pipe fittings generally require ground tests on flow resistance and heat transfer before installation. Affected by performance parameters, physical space, and maintenance manufacturability, the resistance elements The interface is often designed as a boss structure, and the size of the interface is often different from the national chemical standards and mechanical standards to form a self-contained system. During the test, the components are not allowed to be damaged when they are docked with the ground test bench. The common product on the market that can meet the connection requirements of this type of components is the clamp, but the best applicable state of the structure of the clamp is normal temperature or low temperature, and it cannot withstand high temperature and high pressure test conditions well.

In addition, in the field of civil pipeline transportation, especially in the field of small and medium-diameter pipeline transportation, when it is required that the pipe section in a specific area can be rotated without dismantling, the two end faces of the pipe section in this area are generally designed as boss structures, but when the end faces of the connected pipes When it is a fixed flange structure, there are no mature products for the connection between it and the boss structure.

Utility model content

In order to overcome the above-mentioned defects in the prior art, the utility model provides a high temperature resistant left and right plug-in embrace flange.

The utility model provides a high-temperature-resistant left and right plug-in hugging flange, which includes a flange body used for connecting two ends of a pipeline. The flange body includes a left plug-in half flange and a right plug-in half flange.

There is an annular groove at the flange inner ring of one of the flange faces of the flange body, and the annular groove matches the boss structure of the pipe end, that is, the groove surface of the annular groove matches the boss structure of the pipe end The full fit contact enables the flange body to embrace the boss structure of the pipe end, ensuring the tightness and stability between the flange body and the boss structure.

The flange body can be divided into left and right plug-in half flanges, both of which are axisymmetric structures and "U" shaped. When the "U"-shaped openings of the left and right plug-in half flanges When placed end-up, the left halves of the two half-flanges are completely symmetrical to their respective right halves; The flange sections are planes parallel to each other, and the distance between the two planes is the same as the diameter of the inner ring of the flange body, which ensures that when the flange body is installed on the pipeline, the left and right half-flanges can pass through the "U" shape. The opening is sleeved on the outer wall of the pipeline, and at this time, the inner ring of the flange body is just in contact with the outer wall of the pipeline.

The flange surface of the side of the left inserting half flange facing the annular groove is provided with a first inferior arc-shaped boss, and the first inferior arc-shaped boss is connected to the "U"-shaped opening end of the right inserting half flange. Matching, the flange surface of the side of the right inserting half flange facing away from the annular groove is provided with a second inferior arc-shaped boss, and the second inferior arc-shaped boss is aligned with the "U" of the left inserting half flange. "Type open end matches, the side of the left inserting half-flange facing the annular groove and the side of the right inserting half-flange facing away from the annular groove are flush with each other to form a complete flange. To achieve the purpose of pluggable.

The flange surface of the flange body with the annular groove is provided with an outer ring high-temperature gasket, which ensures the pre-tightening force reserve of the bolts under high temperature and high pressure conditions.

Preferably, the left plug-in half-flange and the right plug-in half-flange are assembled into a flange body by countersunk screws, and the heads of the countersunk screws can be flush with the surface of the flange body without screw protrusions.

Preferably, the flange body is connected to the butt end by bolts.

Preferably, the holes of the flange body are plain holes or threaded holes. When fixing two flange bodies with bolts, the bolts enter from the light hole end of one flange body and are fastened at the threaded holes of the other flange body. , the nut is omitted, so that the plate surface of the flange body with the hole as the threaded hole is flush.

Preferably, the thicknesses of the first inferior arc-shaped boss and the second inferior arc-shaped boss are half of the thickness of the flange body, and the inferior arc-shaped boss is in the plan view where the flange surface with the boss is the upper surface, Bosses appear as subarc circles.

Preferably, an inner-ring high-temperature gasket is provided on the contact surfaces at both ends of the pipeline, and the inner-ring high-temperature gasket ensures the tightness of the pipeline.

If the flange body is made of stainless steel, its application range can reach a pressure of 3.5MPa and a temperature of 450°C. If a high-temperature alloy material is selected, and the thickness of the wall and the structure of the flange contact surface are appropriately modified, the application range can be extended to a pressure of 6.3MPa and a temperature of 850°C. ℃ high pressure, ultra high temperature grade.

Tests have proved that the embrace flange provided by the utility model can achieve zero leakage when the pipeline pressure is 3.5MPa and the circulating medium is 420°C. After a 40-hour durability test under the above temperature and pressure conditions, the flange was disassembled for inspection and found no damage or failure, and a second test was performed after reassembly without leakage.

The utility model provides a high temperature resistant left and right plug-in hugging flange, which can realize reliable docking with the ground test bench without destroying or modifying the boss structure of the aviation test piece, and can be used under high pressure and high temperature conditions. Long-term operation can also realize effective docking between the boss structure pipe and the fixed flange structure pipe without refitting the two, and improve the replaceability of special pipe sections.

Description of drawings

Figure 1 is a schematic diagram of the structure of the high temperature resistant left and right plug-in hugging flanges;

Fig. 2 is A-A sectional view of Fig. 1;

Figure 3 is a structural schematic diagram of the left plug-in embrace flange;

Fig. 4 is the B-B sectional view of Fig. 3;

Fig. 5 is a structural schematic diagram of the right plug-in embrace flange;

Fig. 6 is the C-C sectional view of Fig. 5;

Fig. 7 is a sectional view of an installation example of a double-boss structure pipeline;

Fig. 8 is a cross-sectional view of an installation example of a flange-boss structure pipeline.

Explanation of reference numerals: left inserting half flange 1, right inserting half flange 2, flange body 10, inner ring high temperature gasket 20, outer ring high temperature gasket 21, countersunk head screw 22, boss structure end face pipe 23, bolt 24, pipe 25 for fixing the end face of the flange structure, annular groove 26, first flange section 30, first inferior arc-shaped boss 31, second flange section 32, second inferior arc-shaped boss 33 .

detailed description

Below in conjunction with accompanying drawing, the utility model is described.

As shown in Figure 1 and Figure 2, a high temperature resistant left and right plug-in hugging flange provided by the utility model includes a flange body 10 for pipeline connection, and the flange body 10 includes a left plug-in half flange 1 and The right half flange 2 is inserted, and the flange inner ring of one of the flange faces of the flange body 10 has an annular groove 26. The annular groove 26 matches the boss structure of the pipe end, and the flange body 10 The flange surface with the annular groove 26 is provided with an outer ring high-temperature gasket 21 .

As shown in Figure 3 and Figure 4, the left half-flange 1 is an axisymmetric structure flange, and its shape is "U"-shaped, and the two first flange sections 30 of the left half-flange 1 are parallel to each other. and the distance between the two first flange sections 30 is the same as the diameter of the inner ring of the flange body 10, and a first Inferior arc-shaped boss 31, the first inferior arc-shaped boss 31 matches the "U"-shaped opening end of the right insert half flange 2, and the thickness of the first inferior arc-shaped boss 31 is the thickness of the flange body 10 half;

As shown in Figure 5 and Figure 6, the right plug-in half flange 2 is an axisymmetric structure flange, and its shape is "U"-shaped, and the two second flange sections 32 of the right plug-in half flange 2 are parallel to each other. and the distance between the two second flange sections 32 is the same as the diameter of the inner ring of the flange body 10, and the flange surface of the right insert half flange 2 facing the annular groove 26 is provided with a second Inferior arc-shaped boss 33, the second inferior arc-shaped boss 33 matches the "U"-shaped opening end of the left half-flange 1, and the thickness of the second inferior arc-shaped boss 33 is 10% of the thickness of the flange body 10. half.

Put the first inferior arc-shaped boss 31 in contact with the "U"-shaped opening end of the right inserting half flange 2, and at the same time connect the second inferior arc-shaped boss 33 with the "U" of the left inserting half flange 1 The open end of the type is in contact with each other. At this time, the two half flanges are inserted into a complete flange, which can be fixed with screws and disassembled when needed.

Embodiment 1: As shown in Figure 7, the pipelines at both ends are the end surface pipelines 23 of the boss structure, and two pieces of threaded connection flange bodies 10 need to be selected, and the holes of one of the two flanges are light holes, and the holes of the other piece are Threaded hole. The specific implementation steps are: first split a piece of flange body 10 into a left plug-in half flange 1 and a right plug-in half flange 2, and make it surround the rear end neck of one of the boss structure end face pipes 23, and then Another piece of flange body 10 is split into left insert half flange 1 and right insert half flange 2, and make it encircle the rear end neck of another boss structure end face pipeline 23, use countersunk head screw 22 to The above four plug-in half flanges become two complete flanges after being fixed. After adjusting the concentricity of the pipe, put the inner ring high-temperature gasket 20 into the annular groove at the end of the pipe, put the outer ring high-temperature gasket 21 between the two flange bodies 10, and then insert the bolt 24 from the two-piece method. The light hole flange in the flange body 10 is put into and tightened, and after adjusting the constraint pre-tightening force, the pipeline sealing inspection is completed.

Embodiment 2: As shown in Figure 8, the pipeline at one end is a boss structure end surface pipeline 23, and the other end pipeline is a pipeline 25 with a fixed flange structure end surface, wherein the end hole of the pipeline 25 with a fixed flange structure end surface is a light hole, It is necessary to select a piece of threaded flange body 10, wherein the holes of the flange are threaded holes. The specific implementation steps are: first split the flange body 10 into a left half-flange 1 and a right half-flange 2, and make it encircle the rear end neck of the boss structure end face pipeline 23, and then use The flange body 10 is fixed by the countersunk screws 22 to form a complete flange. After adjusting the concentricity of the pipe, put the inner ring high-temperature gasket 20 into the annular groove at the end of the pipe, put the outer ring high-temperature gasket 21 between the flange body 10 and the pipe 25 on the end face of the fixed flange structure, and then Put the bolt 24 into the end of the pipeline 25 on the end face of the fixed flange structure and tighten it, adjust the restraint pretightening force and check the pipeline seal.

The above is only a specific embodiment of the present utility model, but the scope of protection of the present utility model is not limited thereto. Any skilled person familiar with the technical field can easily think of changes within the technical scope disclosed by the utility model Or replacement, all should be covered within the scope of protection of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (6)

1. A high-temperature-resistant left and right plug-in hugging flange, including a flange body (10) for connecting two ends of a pipeline, characterized in that, the flange body (10) includes a left plug-in half flange (1 ) and the right half-flange (2), An annular groove (26) is provided at the flange inner ring of one of the flange faces of the flange body (10), and the annular groove (26) is adapted to the boss structure of the pipe end; The left plug-in half flange (1) and the right plug-in half flange (2) are axisymmetric structure flanges, and the shape is "U". The left plug-in half flange (1) and the right plug-in half flange The two opposite flange sections of the "U"-shaped open end of the flange (2) are planes parallel to each other, and the distance between the two planes is the same as the diameter of the inner ring of the flange body (10); The flange surface of the side facing the annular groove (26) of the left inserting half flange (1) is provided with a first inferior arc-shaped boss (31) structure, and the first inferior arc-shaped boss (31 ) is matched with the "U"-shaped opening end of the right inserting half flange (2), and the flange surface of the side of the right inserting half flange (2) facing away from the annular groove (26) is provided with a second Two inferior arc-shaped bosses (33) structure, the second inferior arc-shaped boss (33) is matched with the "U"-shaped opening end of the left half-flange (1); The flange surface of the flange body (10) having the annular groove (26) is provided with an outer ring high-temperature gasket (21). 2. The high temperature resistant left and right plug-in hugging flange according to claim 1, characterized in that, the left plug-in half flange (1) and the right plug-in half flange (2) are connected by countersunk screws (22 ) assembled into the flange body (10). 3. The high temperature resistant left and right plug-in hugging flange according to claim 1 or 2, characterized in that, the flange body (10) is connected to the butt end by bolts (24). 4. The high temperature resistant left and right plug-in hugging flange according to claim 3, characterized in that the holes of the flange body (10) are plain holes or threaded holes. 5. The high temperature resistant left and right plug-in hugging flange according to claim 1, characterized in that the first inferior arc-shaped boss (31) of the left plug-in half flange (1) and the right plug-in half flange The thickness of the second inferior arc-shaped boss (33) of the flange (2) is half of the thickness of the flange body (10). 6. The high-temperature-resistant left and right plug-in hugging flange according to claim 1, characterized in that an inner ring high-temperature gasket (20) is provided on the contact surface at both ends of the pipe.