Movable flange type pipe connecting structure and mounting method thereof

Abstract

The invention belongs to the technical field of transformer manufacturing, and relates to a movable flange type connecting pipe connecting structure and a mounting method thereof. In the connecting pipe connecting structure, a plurality of first bolt holes are evenly formed in the circumferential direction of an outer flange of a first connecting pipe, and an outer flange step of a circumferential structure is arranged on the lower edge of the inner circumference of the outer flange of the first connecting pipe. An inner flange step of a circumferential structure is arranged on the upper edge of the periphery of the inner flange of the first connecting pipe, the inner flange step is connected with the outer flange step in a clamped mode, a sealing groove of a circumferential structure is formed in the lower surface of the inner flange of the first connecting pipe, the sealing washer is installed in the sealing groove, and the upper end of the inner flange of the first connecting pipe is arranged at the lower end of the first connecting pipe in a sleeved mode and welded to the first connecting pipe. According to the installation method, the outer flange of the first connecting pipe and the inner flange of the first connecting pipe are sequentially arranged on the periphery of the end in a sleeving mode and welded, and the second connecting pipe is connected through bolts after the sealing gasket is placed in the sealing groove. The connecting pipe is convenient to adjust and install and excellent in fastening performance and sealing performance, interference caused by tolerance of the connecting pipe or troubles during connection and adjustment are avoided, and the adjusting difficulty during installation of the connecting pipe is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of transformer manufacturing, and relates to a live flange type pipe connection structure suitable for transformer design and manufacturing and a mounting method thereof. BACKGROUND

[0002] In traditional transformer design, the connection components of the transformer pipe are not many, but under the requirements of intelligent informationization of transformers today, various intelligent components are increasingly connected to the transformer body through the pipe connection, such as single hydrogen online monitoring, respirators, oil discharge pipes and other intelligent components, which need to be fixedly connected with the transformer body through the pipe connection structure.

[0003] The design and manufacturing of transformers need to adapt to the current requirements of intelligent informationization, which makes the precision requirements of various intelligent components when connected with the pipe higher than before, and the addition of various intelligent components makes the requirements for the welding direction of the flanges of the original pipe more demanding. Under the fixed structure of the old pipe flange plate, the pipe flange face and the intelligent component flange face are prone to corresponding tolerances, and often face technical problems such as large installation deviation, connection interference, and insecure fixed connection. Therefore, the pipe connection structure needs to be improved to reduce the connection interference and insecure connection caused by process errors and environmental conditions. SUMMARY

[0004] In order to solve the technical problems in the above technical background, the present application proposes a general new type of transformer live flange type pipe connection structure and a mounting method thereof. The technical scheme adopted by the present application is as follows: A live flange type pipe connection structure, comprising a pipe one, a pipe one outer flange, a pipe one inner flange and a sealing gasket, a plurality of through bolt holes one are uniformly distributed around the pipe one outer flange, and a circular structure outer flange step is arranged at the lower edge of the inner circumference of the pipe one outer flange; a circular structure inner flange step is arranged at the upper edge of the outer circumference of the pipe one inner flange, and the inner flange step and the outer flange step are matched and connected, a circular structure sealing groove is arranged on the lower surface of the pipe one inner flange, the sealing gasket is installed in the sealing groove, and the upper end of the pipe one inner flange is sleeved on the lower end of the pipe one and is welded to the pipe one.

[0005] Preferably, the pipe two end is welded to the pipe two flange, the pipe two flange is provided with bolt holes two corresponding to the bolt holes one, the bolt end passes through the bolt holes one and the bolt holes two, and the bolt end is threadedly connected with the nut.

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

[0007] The mounting method of the foregoing live flange type pipe connection structure comprises the following steps: Sleeve the outer flange of the union pipe one on the outer periphery of the union pipe one end, and then sleeve the inner flange of the union pipe one on the outer periphery of the union pipe one end, the inner flange step and the outer flange step are matched and engaged together, and the upper surface of the inner flange of the union pipe one is welded with the outer periphery of the union pipe one into an integral body; Place the sealing washer in the sealing groove, pass the bolt through the bolt hole one and the bolt hole two of the union pipe two end, and threadedly connect the nut with the lower end of the bolt, and connect the union pipe one and the union pipe two together through the bolt and the nut; then rotate the union pipe two flange side of the union pipe two, fine-tune the direction and angle of the union pipe two, and fasten through the nut after the union pipe two is adjusted in place.

[0008] Preferably, the welding bead does not exceed the edge of the upper surface of the inner flange of the union pipe one.

[0009] The beneficial effects of the present application are: The connecting structure of the present application is mainly applied to the fixed connection of the intelligent components of the transformer and the union pipe or the butt joint of the bent pipe, has the characteristics of convenient adjustment and installation, excellent fastening and sealing, avoids the interference caused by the tolerance or the trouble in the adjustment of the union pipe connection, not only has the prospect of wide application, but also greatly reduces the adjustment difficulty and the on-site installation and adjustment time. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some specific embodiments of the present application, and other drawings belonging to the protection scope of the present application can also be obtained by those skilled in the art without creative labor on the basis of these drawings; Figure 1 is a cross-sectional view of the transformer live flange type union pipe connecting structure of the embodiment of the present application; Figure 2 is a structural schematic view of the outer flange of the union pipe one, wherein part (a) is a top view, and part (b) is an N-N cross-sectional view of part (a); Figure 3 is a structural schematic view of the inner flange of the union pipe one, wherein part (a) is a top view, and part (b) is an M-M cross-sectional view of part (a); In the figure, 1 is the union pipe one, 2 is the outer flange of the union pipe one, 3 is the inner flange of the union pipe one, 4 is the sealing washer, 5 is the bolt, 6 is the nut, 7 is the union pipe two, 8 is the flange of the union pipe two, 9 is the bolt hole one, 10 is the sealing groove, 11 is the outer flange step, and 12 is the inner flange step. DETAILED DESCRIPTION

[0011] The invention will be further described below with reference to the accompanying drawings and examples. The specific implementation process is as follows:

[0012] Example 1:

[0013] like Figures 1-3 As 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.

[0014] Figure 1 The connecting pipe 2 7 is a common ordinary connecting pipe connection structure. The upper end of the connecting pipe 2 7 is welded to the connecting pipe 2 flange 8, and the connecting pipe 2 flange 8 has bolt holes 2 corresponding to bolt holes 1 9.

[0015] 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 invention 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.

[0016] 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.

[0017] Example 2:

[0018] The installation method of the flange-type pipe connection structure provided in Embodiment 1 of the present invention is 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 as 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, so as not to affect the adjustment and rotation of the outer flange 2 of the connecting pipe.

[0019] After welding the inner flange 3 of the first pipe, the sealing washer 4 is placed in the sealing groove 10. The bolt 5 is threaded through the bolt hole 1 and the bolt hole 2 from top to bottom, and the lower end of the bolt 5 is screwed with the nut 6. The first pipe 1 and the second pipe 7 are connected together through the bolt 5 and the nut 6. Then, the direction and angle of the second pipe 7 are adjusted by rotating the second pipe 7 at the side of the second pipe flange 8. After the second pipe 7 is adjusted in place, the nut 6 is tightened to fasten the second pipe flange 8 and the inner flange 3 of the first pipe, which ensures the sealing effect of the connection between the first pipe 1 and the second pipe 7.

[0020] Finally, it should be noted that the above examples are merely specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, but not to limit the scope of protection of the present application. Those skilled in the art should understand that any person skilled in the art can modify or easily think of changes to the technical solutions described in the foregoing examples within the technical scope disclosed by the present application, or make equivalent replacements to some of the technical features; and these modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered within the protection scope of the present application.

Claims

1. A flanged pipe connection structure, characterized in that, It includes the union pipe one (1), the union pipe one outer flange (2), the union pipe one inner flange (3) and the sealing washer (4), the union pipe one outer flange (2) is uniformly distributed and is provided with several through bolt holes one (9), the outer flange step (11) of circumferential structure is arranged at the lower edge of the inner circumference of the union pipe one outer flange (2); The inner flange step (12) of circumferential structure is arranged at the upper edge of the outer circumference of the union pipe one inner flange (3), the inner flange step (12) and the outer flange step (11) are matched and connected, the sealing groove (10) of circumferential structure is arranged at the lower surface of the union pipe one inner flange (3), the sealing washer (4) is installed in the sealing groove (10), the upper end of the union pipe one inner flange (3) is sleeved on the lower end of the union pipe one (1) and is welded with the union pipe one (1).

2. A live flanged pipe coupling connection structure according to claim 1, wherein The union pipe two flange (8) is welded on the end of the union pipe two (7), the bolt hole two corresponding to the bolt hole one (9) is arranged on the union pipe two flange (8), the bolt (5) is arranged through the bolt hole one and the bolt hole two, and the bolt (5) is screwed with the nut (6).

3. A live flanged pipe coupling connection structure as defined in claim 1 wherein, The union pipe one (1) adopts DN25 union pipe, or DN50 union pipe, or DN80 union pipe, or DN100 union pipe.

4. A method of installing a live flanged pipe coupling connection structure as claimed in claim 2, wherein, The following steps are included: The union pipe one outer flange (2) is sleeved on the outer circumference of the end of the union pipe one (1), then the union pipe one inner flange (3) is sleeved on the outer circumference of the end of the union pipe one (1), the inner flange step (12) and the outer flange step (11) are matched and engaged together, and the upper surface of the union pipe one inner flange (3) and the outer circumference of the union pipe one (1) are welded into one body; The sealing washer (4) is placed in the sealing groove (10), the bolt (5) is arranged through the bolt hole one and the bolt hole two at the end of the union pipe two (7), the lower end of the bolt (5) is screwed with the nut (6), the union pipe one (1) and the union pipe two (7) are connected together through the bolt (5) and the nut (6), then the union pipe two (7) on the side of the union pipe two flange (8) is rotated, the direction and the angle of the union pipe two (7) are adjusted, and the union pipe two (7) is fastened by tightening the nut (6) after being adjusted in place.

5. The method of installing a live flanged union according to claim 4, wherein, The welding bead should not exceed the edge of the upper surface of the union pipe one inner flange (3).

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