High-air-tightness variable-diameter flange

Abstract

The utility model discloses a high-air-tightness variable-diameter flange, which relates to the technical field of flanges and comprises a variable-diameter flange pipe. The number of the butt joint mechanisms is two, and the two butt joint mechanisms are arranged at the two ends of the variable-diameter flange pipe correspondingly and used for connecting the variable-diameter flange pipe with an external pipeline; the number of the trapezoid sealing rings is two, and the two trapezoid sealing rings are fixedly connected to the positions, close to the edge, of the two ends of the variable-diameter flange pipe correspondingly. And a top butt joint ring. According to the high-airtightness variable-diameter flange, by using the trapezoidal sealing ring, the interior of the variable-diameter flange pipe is provided with a gradient, a pipeline and the variable-diameter flange pipe are connected in a trapezoidal shape, the internal sealing performance in the using process is guaranteed, meanwhile, the positioning butt joint ring is matched, the pipeline and the variable-diameter flange pipe are in butt joint externally, and external sealing is guaranteed; according to the high-air-tightness variable-diameter flange, due to the fact that the sealing mechanism is used, after a pipeline and a variable-diameter flange pipe are in butt joint, the top and the side edges of the pipeline and the variable-diameter flange pipe are sealed through rubber rings, and the sealing performance in the using process is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of flanges, in particular to a high-air-tightness variable-diameter flange. Background Art

[0002] A reducing flange is a pipe connector and a type of flange. It can connect two flanges of different diameters to achieve pipe connection and fluid transmission. Reducing flanges are often used to connect pipes of different sizes, to match pipelines of different specifications, and for engineering applications such as pipeline repair and transformation. The reason for the appearance of this flange in engineering is to solve the problem that standard flanges cannot match pipe fittings and pipelines. When standard flanges cannot be connected to pipe fittings and pipelines, using a reducing flange is the simplest and most effective solution. The inner diameter size of the reducing flange is different from that of the standard flange to meet specific connection requirements. In addition, the specifications and models of reducing flanges are diverse, and the appropriate specifications and models can be selected according to the specific application scenarios.

[0003] The authorization publication number "CN215173016U" records "a reducing flange, comprising an upper conical tube, a bellows and a lower conical tube; the large end of the upper conical tube is provided with a first flange connection part, the first flange connection part is provided with a plurality of first connecting through holes, the first flange connection part is also provided with a first bearing, and the upper conical tube is provided with a first filter screen when rotated by the first bearing; the small end of the upper conical tube is provided with a second flange connection part, the second flange connection part is provided with a plurality of second connecting through holes; one end of the bellows is provided with a third flange connection part; the bellows is connected to the second flange connection part of the upper conical tube through the third flange connection part and is fixed by a first bolt; the other end of the bellows is provided with a fourth flange connection part, the fourth flange connection part is provided with a fourth connecting through hole; the bellows is also provided with a plurality of springs; the large end of the lower conical tube is provided with a fifth flange connection part. The reducing flange of the utility model is easy to disassemble, reduces the difficulty of installation, and has good sealing performance."

[0004] The above patented variable diameter flange is easy to disassemble, reduces the difficulty of installation, and has good sealing performance. However, during use, the inside of the pipe is smooth, which easily causes leakage between the pipe and the flange. Utility Model Content

[0005] The utility model provides a high-air-tightness reducer flange. By using a trapezoidal sealing ring, the interior of the reducer flange pipe is provided with a slope, so that the connection between the pipeline and the reducer flange pipe is ladder-shaped, thereby ensuring internal sealing during use. At the same time, by cooperating with a positioning docking ring, the pipeline and the reducer flange pipe are externally docked to ensure external sealing. By using a sealing mechanism, after the pipeline and the reducer flange pipe are docked, their tops and sides are sealed by rubber rings, thereby ensuring sealing during use.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a high airtightness reducer flange, comprising:

[0007] Reducer flange pipe;

[0008] The docking mechanism is provided with two groups, and the two groups of docking mechanisms are respectively provided at both ends of the reducer flange pipe, for connecting the reducer flange pipe with the external pipeline;

[0009] There are two trapezoidal sealing rings, which are fixedly connected to the two ends of the reducing flange pipe near the edge;

[0010] Two top-position butt joint rings are provided, and the two top-position butt joint rings are fixedly connected to the two ends of the reducing flange pipe respectively; and

[0011] The sealing mechanism is provided with two groups, and the two groups of sealing mechanisms are respectively arranged at the two ends of the reducing flange pipe to seal between the external pipeline and the reducing flange pipe.

[0012] Furthermore, each group of the docking mechanisms includes a plurality of docking mounting holes and a docking fixed ring plate, the docking fixed ring plate is fixedly connected to one end of the variable diameter flange pipe, and the plurality of the docking mounting holes are equidistantly arranged on the docking fixed ring plate.

[0013] Furthermore, each set of the sealing mechanisms includes:

[0014] A top sealing component, provided on the trapezoidal sealing ring, for sealing the top between the reducer flange pipe and the pipeline; and

[0015] The side sealing component is arranged in the reducing flange pipe and is used for side sealing between the reducing flange pipe and the pipeline.

[0016] Furthermore, the top sealing component includes an L-shaped clamping groove and a butt rubber ring. The L-shaped clamping groove is opened on the top of the trapezoidal sealing ring, and the butt rubber ring is clamped in the L-shaped clamping groove.

[0017] Furthermore, the side sealing component includes a sealing groove and a sealing rubber ring. The sealing groove is opened at the top of the inner wall of the reducing flange pipe, and the sealing rubber ring is installed in the sealing groove.

[0018] The utility model provides a highly airtight variable diameter flange and has the following beneficial effects:

[0019] (1) The high airtightness reducer flange uses a trapezoidal sealing ring to provide a slope inside the reducer flange pipe, so that the connection between the pipeline and the reducer flange pipe is ladder-shaped, ensuring internal sealing during use. At the same time, with the positioning docking ring, the pipeline and the reducer flange pipe are docked externally to ensure external sealing.

[0020] (2) The high airtightness reducer flange can be sealed with a rubber ring on the top and side of the pipe and the reducer flange pipe after docking through the use of a sealing mechanism, thereby ensuring the sealing during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional exploded view of the present utility model;

[0022] Figure 2 It is the guarantee diagram of this utility model;

[0023] Figure 3 It is a partial cross-sectional view of the utility model;

[0024] Figure 4 It is a three-dimensional diagram of the present utility model.

[0025] In the figure: 1. Reducer flange pipe; 2. Docking installation hole; 3. Top docking ring; 4. Sealing rubber ring; 5. L-shaped clamping groove; 6. Trapezoidal sealing ring; 7. Sealing groove; 8. Docking rubber ring; 9. Docking fixing ring plate. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1-4 The utility model provides a technical solution: a high airtightness reducer flange, comprising:

[0028] Reducer flange pipe 1;

[0029] The docking mechanism is provided with two sets, and the two sets of docking mechanisms are respectively provided at both ends of the reducer flange pipe 1, for connecting the reducer flange pipe 1 with the external pipeline;

[0030] There are two trapezoidal sealing rings 6, which are fixedly connected to the two ends of the reducing flange pipe 1 near the edge;

[0031] Two top-position butt joint rings 3 are provided, and the two top-position butt joint rings 3 are fixedly connected to the two ends of the reducing flange pipe 1 respectively; and

[0032] There are two sets of sealing mechanisms, which are respectively arranged at the two ends of the reducer flange pipe 1 to seal between the external pipeline and the reducer flange pipe 1.

[0033] In this embodiment, the trapezoidal sealing rings 6 are at both ends of the reducer flange pipe 1, changing the smooth state of the inside of the reducer flange pipe 1 so that the pipe can be docked on the trapezoidal sealing ring 6. At the same time, the top docking ring 3 is docked with the outside of the pipe to improve the sealing performance during use.

[0034] Specifically, each docking mechanism includes a plurality of docking mounting holes 2 and a docking fixing ring plate 9. The docking fixing ring plate 9 is fixedly connected to one end of the reducing flange pipe 1. The plurality of docking mounting holes 2 are equidistantly arranged on the docking fixing ring plate 9.

[0035] In this embodiment, a plurality of docking mounting holes 2 and a docking fixing ring plate 9 ensure the connection between the pipeline and the reducing flange pipe 1 .

[0036] Specifically, each sealing mechanism includes:

[0037] A top sealing component, provided on the trapezoidal sealing ring 6, for sealing the top between the reducer flange pipe 1 and the pipeline; and

[0038] The side sealing component is arranged in the reducing flange pipe 1 and is used for side sealing between the reducing flange pipe 1 and the pipeline.

[0039] In this embodiment, the top sealing component and the side sealing component cooperate with each other to ensure the sealing effect.

[0040] Specifically, the top sealing component includes an L-shaped clamping groove 5 and a butt rubber ring 8 . The L-shaped clamping groove 5 is provided on the top of the trapezoidal sealing ring 6 , and the butt rubber ring 8 is clamped in the L-shaped clamping groove 5 .

[0041] In this embodiment, the L-shaped clamping groove 5 and the butt rubber ring 8 cooperate with each other so that the pipe is squeezed therebetween to complete the positioning seal.

[0042] Specifically, the side sealing component includes a sealing groove 7 and a sealing rubber ring 4 . The sealing groove 7 is opened at the top of the inner wall of the reducing flange pipe 1 , and the sealing rubber ring 4 is installed in the sealing groove 7 .

[0043] In this embodiment, the sealing rubber ring 4 in the sealing groove 7 seals the side of the pipeline.

[0044] During use, insert one end of the pipe into the reducer flange pipe 1 so that the end of the pipe contacts the butt rubber ring 8, and the pipe and the reducer flange pipe 1 are tightly connected by bolts. After the connection is completed, during use, the butt rubber ring 8 on the trapezoidal sealing ring 6 seals the pipe in the top position. At the same time, the sealing rubber ring 4 in the sealing groove 7 seals the side of the pipe to ensure the sealing effect during use.

[0045] The control method of the present invention is to manually start and stop the switch. The wiring diagram of the power element and the provision of power supply are common knowledge in the field. Moreover, the present invention is mainly used to protect mechanical devices. Therefore, the control method and wiring arrangement are not explained in detail in the present invention.

[0046] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. High airtightness reducer flange, characterized by: include: Reducer flange pipe (1); The docking mechanism is provided with two groups, and the two groups of docking mechanisms are respectively provided at both ends of the reducing flange pipe (1) for connecting the reducing flange pipe (1) with an external pipeline; Two trapezoidal sealing rings (6) are provided, and the two trapezoidal sealing rings (6) are respectively fixedly connected to the two ends of the reducing flange pipe (1) near the edge; Two top-position docking rings (3) are provided, and the two top-position docking rings (3) are respectively fixedly connected to the two ends of the reducing flange pipe (1); and The sealing mechanism is provided with two groups, and the two groups of sealing mechanisms are respectively provided at the two ends of the reducing flange pipe (1) to seal between the external pipeline and the reducing flange pipe (1).

2. The high airtightness reducing flange according to claim 1, characterized in that: Each group of the docking mechanisms comprises a plurality of docking mounting holes (2) and a docking fixing ring plate (9), wherein the docking fixing ring plate (9) is fixedly connected to one end of the reducing flange pipe (1), and the plurality of docking mounting holes (2) are equidistantly arranged on the docking fixing ring plate (9).

3. The high airtightness reducing flange according to claim 2, characterized in that: Each set of sealing mechanisms includes: A top sealing component is provided on the trapezoidal sealing ring (6) and is used for sealing the top between the reducing flange pipe (1) and the pipeline; and The side sealing component is arranged in the reducing flange pipe (1) and is used for side sealing between the reducing flange pipe (1) and the pipeline.

4. The high airtightness reducing flange according to claim 3, characterized in that: The top sealing component comprises an L-shaped clamping groove (5) and a butt joint rubber ring (8); the L-shaped clamping groove (5) is opened on the top of the trapezoidal sealing ring (6); and the butt joint rubber ring (8) is clamped and arranged in the L-shaped clamping groove (5).

5. The high airtightness reducing flange according to claim 4, characterized in that: The side sealing component comprises a sealing groove (7) and a sealing rubber ring (4); the sealing groove (7) is opened at the top of the inner wall of the reducing flange pipe (1); and the sealing rubber ring (4) is installed in the sealing groove (7).

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