A live flange type pipe connection structure

Abstract

The utility model belongs to transformer manufacturing field relates to a kind of live flange type manifold connecting structure, including manifold one, manifold one outer flange, manifold one inner flange and sealing washer, the circumferential of manifold one outer flange is evenly distributed and is opened several through bolt holes one, the inner periphery lower edge of manifold one outer flange is opened outer flange step of circumferential structure;The inner periphery upper edge of manifold one inner flange is opened inner flange step of circumferential structure, and inner flange step and outer flange step are mutually matched and engaged connection, the lower surface of manifold one inner flange is opened sealing groove of circumferential structure, sealing washer is installed in sealing groove, and manifold one inner flange upper end portion is sleeved in manifold lower end portion, and with manifold one welding connection.The utility model has the characteristics of convenient adjustment installation, fastening, sealing, avoids the trouble of interference or connection adjustment caused by manifold tolerance, has the prospect of wide range of application, and reduces the adjustment difficulty when manifold installation, reduces the on-site installation adjustment time.

Description

Technical Field

[0001] This utility model belongs to the field of transformer manufacturing technology, and relates to a live flange type pipe connection structure suitable for transformer design and manufacturing. Background Technology

[0002] In traditional transformer design, there are not many connecting components for transformer pipes. However, with the current requirements for intelligent and information-based transformers, there are more and more intelligent components connected to the transformer body through pipes. For example, intelligent components such as single hydrogen online monitoring, breather, and oil drain pipe all need to be fixedly connected to the transformer body through pipe connection structures.

[0003] The design and manufacturing of transformers need to adapt to current requirements such as intelligent information technology. This necessitates higher precision requirements for the connection between various intelligent components and connecting pipes compared to the past. Furthermore, the addition of these intelligent components places more stringent demands on the welding direction of the original connecting pipe flanges. Under the old fixed structure of the connecting pipe flanges, the flange faces of the connecting pipes and the intelligent component flange faces are prone to corresponding tolerances, frequently leading to technical problems such as large installation deviations, connection interference, and unreliable fixed connections. Therefore, it is necessary to improve the connecting pipe connection structure to reduce connection interference and unreliable connections caused by process errors and environmental factors. Summary of the Invention

[0004] To address the technical problems mentioned above, this utility model proposes a novel, universal transformer flange-type pipe connection structure. The technical solution adopted by this utility model is as follows: A flanged pipe connection structure includes a first pipe, an outer flange of the first pipe, an inner flange of the first pipe, and a sealing gasket. The outer flange of the first pipe has several through bolt holes evenly distributed around its circumference. A circular outer flange step is formed at the lower inner circumference of the outer flange. A circular inner flange step is formed at the upper outer circumference of the inner flange of the first pipe. The inner flange step and the outer flange step are engaged and connected. A circular sealing groove is formed on the lower surface of the inner flange of the first pipe, and the sealing gasket is installed in the sealing groove. The upper end of the inner flange of the first pipe is fitted onto the lower end of the first pipe and welded to the first pipe.

[0005] Preferably, the two ends of the connecting pipe are welded to the connecting pipe flange, and the connecting pipe flange has a bolt hole two corresponding to the bolt hole one. The bolt end passes through the bolt hole one and the bolt hole two, and the bolt end is threaded to connect to the nut.

[0006] Preferably, the connecting pipe is a DN25 connecting pipe, or a DN50 connecting pipe, or a DN80 connecting pipe, or a DN100 connecting pipe.

[0007] The beneficial effects of this utility model are: The connection structure of this utility model is mainly used for the fixed connection of intelligent components of transformers with connecting pipes or bent pipes. It features convenient adjustment and installation, excellent fastening and sealing, and avoids interference caused by tolerances or troublesome adjustments during connecting pipes. It not only has the prospect of wide application, but also greatly reduces the difficulty of adjustment during connecting pipe installation and shortens the on-site installation and adjustment time. Attached Figure Description

[0008] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are some specific embodiments of this utility model. For those skilled in the art, other drawings that fall within the scope of protection of this application can be obtained based on these drawings without creative effort. Figure 1 This is a cross-sectional view of the transformer live flange type pipe connection structure according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of the connecting pipe and the outer flange of this utility model embodiment, wherein (a) is a top view and (b) is a cross-sectional view of (a) NN; Figure 3 This is a structural schematic diagram of the connecting pipe and inner flange of this utility model embodiment, wherein (a) is a top view and (b) is a cross-sectional view of part (a) (mm). In the diagram, 1 is connecting pipe one, 2 is the outer flange of connecting pipe one, 3 is the inner flange of connecting pipe one, 4 is the sealing gasket, 5 is the bolt, 6 is the nut, 7 is connecting pipe two, 8 is the flange of connecting pipe two, 9 is bolt hole one, 10 is the sealing groove, 11 is the outer flange step, and 12 is the inner flange step. Detailed Implementation

[0009] The present invention will be further described below with reference to the accompanying drawings and examples. The specific implementation process is as follows: like Figure 1-3As shown, a flanged pipe connection structure includes a connecting pipe 1, an outer flange 2, an inner flange 3, and a circular sealing gasket 4. The outer flange 2 has several through bolt holes 9 evenly distributed around its circumference, and a circular outer flange step 11 is formed at the lower inner edge of its inner circumference. The inner flange 3 has a circular inner flange step 12 at its upper outer circumference. The inner flange step 12 and the outer flange step 11 are engaged and connected. A circular sealing groove 10 is formed on the lower surface of the inner flange 3, and the sealing gasket 4 is installed in the sealing groove 10. The upper end of the inner flange 3 is fitted onto the lower end of the connecting pipe 1 and welded to it. The lower end of the connecting pipe 1 is located inside the inner flange 3 and cannot protrude.

[0010] The present invention provides a flanged pipe connection structure, the installation and use steps of which are as follows: First, fit the outer flange 2 of the connecting pipe onto the outer circumference of the end of the connecting pipe 1. Then, fit the inner flange 3 of the connecting pipe onto the outer circumference of the end of the connecting pipe 1. The inner flange step 12 and the outer flange step 11 are engaged and locked together. Weld the upper surface of the inner flange 3 of the connecting pipe to the outer circumference of the connecting pipe 1 to form a single unit. During welding, care should be taken to ensure that the weld bead does not extend beyond the edge of the upper surface of the inner flange 3 of the connecting pipe to avoid affecting the adjustment and rotation of the outer flange 2 of the connecting pipe.

[0011] After welding the inner flange 3 of the connecting pipe, place the sealing gasket 4 in the sealing groove 10. Figure 1 The connecting pipe 7 is a common ordinary connecting pipe connection structure. A connecting pipe flange 8 is welded to the upper end of connecting pipe 7. A bolt hole 2 is opened on connecting pipe flange 8, corresponding to bolt hole 9. Bolt 5 is passed through bolt hole 1 and bolt hole 2 from top to bottom. A nut 6 is threaded onto the lower end of bolt 5. Connecting pipe 1 and connecting pipe 7 are connected together using bolt 5 and nut 6. Then, by rotating connecting pipe 7 on the side of connecting pipe flange 8, the direction and angle of connecting pipe 7 can be finely adjusted. After connecting pipe 7 is adjusted to the correct position, nut 6 is tightened for final security. The sealing gasket 4 between connecting pipe flange 8 and the inner flange 3 of connecting pipe 1 ensures a good sealing effect between connecting pipe 1 and connecting pipe 7.

[0012] The connecting pipe 1 can be made of standardized pipes of various specifications such as DN25, DN50, DN80, and DN100 to suit different design requirements. For example, a DN25 connecting pipe can be used for the installation of transformer breather, while a DN80 connecting pipe can be used for the installation of circuit breakers and oil drain lines. Taking breather installation as an example, connecting pipe 1 is a reserved connection port on the transformer body side, and connecting pipe 2 7 can be regarded as the breather interface. The live flange connecting pipe connection structure designed in this embodiment of the utility model can eliminate the manufacturing tolerances between connecting pipe 1 and connecting pipe 2 7 by fine-tuning connecting pipe 2 7, thereby quickly completing the installation of the breather.

[0013] There are no special requirements for the surface roughness of the outer flange 2 of the connecting pipe, while the surface roughness of the inner flange 3 of the connecting pipe can be in accordance with the standard requirements.

[0014] Finally, it should be noted that the above embodiments are merely specific implementations of this utility model, used to illustrate the technical solution of this utility model, and not to limit it. The protection scope of this utility model is not limited thereto. Those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this utility model; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be covered within the protection scope of this utility model.

Claims

1. A flanged pipe connection structure, characterized in that, The device includes a connecting pipe (1), a connecting pipe outer flange (2), a connecting pipe inner flange (3), and a sealing gasket (4). The connecting pipe outer flange (2) has several through bolt holes (9) evenly distributed around its circumference. A circular outer flange step (11) is provided at the lower edge of the inner circumference of the connecting pipe outer flange (2). A circular inner flange step (12) is provided at the upper edge of the outer circumference of the connecting pipe inner flange (3). The inner flange step (12) and the outer flange step (11) are engaged and connected to each other. A circular sealing groove (10) is provided on the lower surface of the connecting pipe inner flange (3). The sealing gasket (4) is installed in the sealing groove (10). The upper end of the connecting pipe inner flange (3) is fitted onto the lower end of the connecting pipe (1) and welded to the connecting pipe (1).

2. The flanged pipe connection structure according to claim 1, characterized in that, The end of the connecting pipe (7) is welded to the flange (8) of the connecting pipe. The flange (8) of the connecting pipe has a bolt hole (2) corresponding to the bolt hole (9). The end of the bolt (5) passes through the bolt hole (1) and the bolt hole (2). The end of the bolt (5) is threaded to the nut (6).

3. The flanged pipe connection structure according to claim 1, characterized in that, The connecting pipe (1) is a DN25 connecting pipe, or a DN50 connecting pipe, or a DN80 connecting pipe, or a DN100 connecting pipe.

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