Ascending base structure and transformer

Abstract

The utility model discloses an ascending flanged base structure and a transformer, which can enable a bushing type current transformer to be installed on a current transformer basin in advance, so that when the bushing type current transformer needs to be replaced, only the bushing type current transformer and the current transformer basin need to be replaced, and an ascending flanged base does not need to be replaced. And the problem that the gas connecting pipe cannot be connected with the main gas connecting pipe due to replacement of the ascending flanged base is avoided. The ascending flanged base structure comprises an ascending flanged base, a current transformer basin and a bushing type current transformer. The ascending flanged base is fixed to the top of an oil tank of the transformer and used for fixing leads of the transformer. And the current transformer basin is detachably arranged in the ascending flanged base. And the bushing type current transformer is arranged on the bottom wall of the current transformer basin.

Description

Technical Field

[0001] This utility model belongs to the field of transformer manufacturing technology, specifically relating to a riser structure and a transformer. Background Technology

[0002] Bushing current transformers are widely used in transformer products to measure the current in the transformer bushings or as an important part of the transformer's secondary protection. For example... Figure 1 As shown, the bushing-type current transformer 4 is generally designed as a ring and fixed inside a cylindrical riser 9. The lower porcelain bushing of the winding lead bushing 6 passes through the hollow part of the bushing-type current transformer 4. The riser, the lower porcelain bushing, and the transformer are arranged concentrically. A connecting pipe 10 is provided at the top of the riser 9, and the connecting pipe 10 is connected to the main connecting pipe by a rigid pipe prepared on site.

[0003] like Figure 1 As shown, in the commonly used installation method of bushing current transformers, an annular support plate is usually welded at an appropriate height on the inner wall of the riser 9. Then, the bushing current transformer 4 is placed on the annular support plate inside the riser 9 in sequence. After the bushing current transformer 4 is assembled, it is dried and tested together with the riser 9.

[0004] In this installation method, the bushing-type current transformer and the riser mount are installed as a single unit, ensuring a high degree of process correlation between the two. Because bushing-type current transformers are prone to damage, if replacement is required on-site, due to time constraints and limitations imposed by on-site installation conditions, a new riser mount and bushing-type current transformer are typically fabricated in the factory, and then the entire assembly is replaced on-site. During this process, due to limitations in machining precision, the connecting pipe 10 on the newly fabricated riser mount may not be directly connected to the rigid pipe already fitted on the original riser mount. This necessitates the on-site fabrication of a new rigid pipe based on the dimensions and position of the connecting pipe 10 and the main connecting pipe on the newly fabricated riser mount, increasing the on-site construction steps. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the above-mentioned shortcomings of the existing technology by providing a riser structure and a transformer. This riser structure allows the bushing-type current transformer to be pre-installed on the current transformer basin, so that when the bushing-type current transformer needs to be replaced, only the bushing-type current transformer and the current transformer basin need to be replaced, without replacing the riser, thus avoiding the problem that the connecting pipe cannot be connected to the main connecting pipe due to the replacement of the riser.

[0006] In the first aspect, the utility model embodiment provides a kind of lifting seat structure, lifting seat structure includes lifting seat, current transformer basin and bushing type current transformer.Lifting seat is fixed in the oil tank top of transformer, for fixing the lead of transformer.Current transformer basin is detachably arranged in the inside of lifting seat.Bushing type current transformer is arranged on the bottom wall of the current transformer basin.

[0007] In some embodiments, the inner side wall of the lifting seat is provided with a mounting seat, the mounting seat is annular, and the current transformer basin is detachably mounted on the mounting seat.

[0008] In some embodiments, the lifting seat includes a lifting seat cylinder and a lifting seat mounting flange.The bottom of the lifting seat cylinder is fixed to the top of the oil tank, and the mounting seat is provided on the inner side wall of the lifting seat cylinder.The lifting seat mounting flange cover is provided on the top of the lifting seat cylinder for pressing the bushing type current transformer.

[0009] In some embodiments, the current transformer basin is made of metal material.A first annular insulating ring is provided between the bushing type current transformer and the bottom wall of the current transformer basin.A second annular insulating ring is provided between the bushing type current transformer and the lifting seat mounting flange.

[0010] In some embodiments, a first through hole is formed in the bottom wall of the current transformer basin to communicate the inside of the current transformer basin with the inside of the oil tank.A first oil channel is provided on the first annular insulating ring, and a second oil channel is provided on the second annular insulating ring.

[0011] In some embodiments, an insulating support plate is provided between the outer edge of the bushing type current transformer and the inner side wall of the current transformer basin.

[0012] In some embodiments, the number of bushing type current transformers is multiple, and the multiple bushing type current transformers are concentrically arranged along the height direction of the lifting seat.An annular insulating paper is provided between any two adjacent bushing type current transformers.

[0013] In some embodiments, the lifting seat cylinder and the current transformer basin are electrically connected by a wire.

[0014] In some embodiments, the lifting seat structure further includes a junction box.The junction box is provided outside the lifting seat cylinder, and the lead of the bushing type current transformer is led into the junction box after passing through the lifting seat cylinder.

[0015] Therefore, the raised seat structure provided by the embodiment of the present application has the following advantages: the bushing type current transformer is assembled on the current transformer basin when the raised seat is not completed and the bushing type current transformer needs to be installed; the bushing type current transformer is conveniently installed on the raised seat through the current transformer basin, so that the installation of the raised seat structure is completed. In this case, when the bushing type current transformer needs to be replaced, the new current transformer basin can be directly remade in the factory, and the bushing type current transformer to be replaced is installed on the current transformer basin, and then the current transformer basin is installed in the raised seat, so that the replacement of the bushing type current transformer is realized, and the raised seat does not need to be replaced in the replacement process of the bushing type current transformer, thereby avoiding the problem that the gas connection pipe cannot be connected with the main gas connection pipe in the prior art when the raised seat is replaced.

[0016] In the second aspect, the embodiment of the present application provides a transformer, which comprises a transformer body and the raised seat structure in the first aspect. The transformer body comprises an oil tank and a winding in the oil tank. The lead of the winding is led out to the outside through an insulating sleeve, and the insulating sleeve is sequentially fixed on the raised seat after passing through the current transformer basin, the bushing type current transformer and the top of the raised seat.

[0017] The transformer provided by the embodiment of the present application has the same beneficial effects as the above-mentioned raised seat structure, and will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 FIG. 1 is a schematic view of a raised seat structure provided in the prior art;

[0019] Figure 2 FIG. 2 is a schematic view of a raised seat structure provided by the embodiment of the present application;

[0020] Figure 3 FIG. 3 is a top view of a current transformer basin provided by the embodiment of the present application.

[0021] In the figure, 1 is a raised seat mounting flange; 2 is a raised seat cylinder; 3 is a current transformer basin;

[0022] 4 is a bushing type current transformer; 5 is a junction box; 6 is an insulating sleeve; 7 is an oil tank; 8 is a mounting seat;

[0023] 9 is a raised seat; 10 is a gas connection pipe. DETAILED DESCRIPTION

[0024] In order for those skilled in the art to better understand the technical scheme of the present application, the present application will be further described in detail below with reference to the drawings and embodiments.

[0025] Embodiment 1:

[0026] As Figure 2 shown, the utility model embodiment provides a kind of lifting seat structure, it is applied to oil-immersed transformer.

[0027] As Figure 2 and Figure 3 shown, the lifting seat structure includes lifting seat 9, current transformer basin 3 and bushing current transformer 4.Lifting seat 9 is fixed in the top of the oil tank 7

[0028] ( Figure 2 Only the top tank cover of oil tank is shown) of transformer, for fixing the lead of transformer.Current transformer basin 3 is detachably arranged inside lifting seat 9.Bushing current transformer 4 is arranged on the bottom wall of current transformer basin 3.

[0029] The inside of lifting seat 9 is communicated with the inside of the oil tank 7 of transformer, which can be understood by those skilled in the art.The winding of transformer is arranged inside the oil tank 7, and the lead of winding is led out to the outside of transformer after passing through the top of lifting seat 9 from the inside of oil tank 7.

[0030] Exemplarily, the outer diameter of current transformer basin 3 is less than the diameter of the inner side wall of lifting seat 9, so that there is enough installation gap between current transformer basin 3 and the inner side wall of lifting seat 9.The material of current transformer basin 3 is high-strength material (such as metal or alloy, etc.), so that current transformer basin 3 has enough strength to support bushing current transformer 4.

[0031] Exemplarily, current transformer basin 3 can be detachably arranged in lifting seat 9 by connecting members such as bolts;or, a protruding part is arranged in the inner side of lifting seat 9, and a groove adapted to the protruding part is arranged on the lower side of the outer edge of current transformer basin 3, and current transformer basin 3 is clamped on the protruding part in the inner side of lifting seat 9 through the groove.

[0032] In this way, current transformer basin 3 can be conveniently installed in the inside of lifting seat 9, or taken out from the inside of lifting seat 9.

[0033] Exemplarily, as Figure 2 shown, the outer side of the lead of winding is provided with a sleeve 6, the shape of bushing current transformer 4 is annular, and bushing current transformer 4 is sleeved outside sleeve 6.

[0034] Exemplarily, as Figure 2 and Figure 3 shown, a circular mounting groove is formed in the middle of current transformer basin 3, and bushing current transformer 4 is installed in the circular mounting groove through screws.

[0035] Through the above setting, the bushing-type current transformer 4 can be pre-assembled in the current transformer basin 3, and then assembled on the riser 9. In this case, when the bushing-type current transformer 4 needs to be replaced, a new current transformer basin 3 can be directly re-made in the factory, the bushing-type current transformer 4 to be replaced is assembled on the current transformer basin 3, and then the current transformer basin 3 is assembled in the riser 9, so that the replacement of the bushing-type current transformer 4 is realized, and the riser 9 does not need to be replaced in the replacement process of the bushing-type current transformer 4, thereby avoiding the problem that the gas connection pipe cannot be connected with the main gas connection pipe due to the replacement of the riser in the prior art.

[0036] Therefore, the riser structure provided in the embodiment of the utility model can assemble the bushing-type current transformer 4 on the current transformer basin 3 when the riser 9 is not completed and the bushing-type current transformer 4 needs to be assembled, and the current transformer basin 3 is detachably arranged in the riser 9, so that the bushing-type current transformer 4 can be conveniently assembled on the riser 9 through the current transformer basin 3, and the assembly of the riser structure is completed.

[0037] When the bushing-type current transformer 4 needs to be replaced, a new current transformer basin 3 can be directly re-made in the factory, the bushing-type current transformer 4 to be replaced is assembled on the current transformer basin 3, and then the current transformer basin 3 is assembled in the riser 9, so that the replacement of the bushing-type current transformer 4 is realized, and the riser 9 does not need to be replaced in the replacement process of the bushing-type current transformer 4, thereby avoiding the problem that the gas connection pipe cannot be connected with the main gas connection pipe due to the replacement of the riser in the prior art.

[0038] Further, in the prior art, when the riser is replaced on site, the newly made riser can also cause the problem of mismatching with the original transformer oil tank interface due to the influence of machining precision. However, the riser structure provided in the embodiment of the utility model can replace the bushing-type current transformer without replacing the riser, thereby avoiding the problem of mismatching between the newly made riser and the original transformer oil tank interface in the prior art. In addition, the riser structure provided in the embodiment of the utility model can enable the bushing-type current transformer 4 to be installed without waiting for the completion of the riser, so that the installation waiting time of the bushing-type current transformer 4 can be saved when the corresponding riser is not completed.

[0039] In some embodiments, as shown in Figs. Figure 2 and Figure 3 The inner side wall of the riser 9 is provided with a mounting seat 8, the mounting seat 8 is annular, and the current transformer basin 3 is detachably mounted on the mounting seat 8.

[0040] Exemplarily, the position of the mounting seat 8 on the inner side wall of the raised seat 9 can be set as required, so that after the current transformer basin 3 is mounted on the mounting seat 8, the bushing-type current transformer 4 can work normally.

[0041] Exemplarily, as shown in Figure 2 and Figure 3 , the top of the mounting seat 8 is provided with a threaded blind hole, and the top outer edge of the current transformer basin 3 is provided with a screw passing hole, the position of the screw passing hole corresponds to the threaded blind hole at the top of the mounting seat 8, and the mounting seat 8 and the current transformer basin 3 are detachably connected through the screw.

[0042] Through the above setting, the current transformer basin 3 can be supported by the mounting seat 8 to fix the current transformer basin 3 at a predetermined height in the raised seat 9.

[0043] In some embodiments, as shown in Figure 2 and Figure 3 , the raised seat 9 includes a raised seat cylinder 2 and a raised seat mounting flange 1. The bottom of the raised seat cylinder 2 is fixed to the top of the oil tank 7; the mounting seat 8 is arranged on the inner side wall of the raised seat cylinder 2. The raised seat mounting flange 1 is arranged on the top of the raised seat cylinder 2 to press the bushing-type current transformer 4.

[0044] Exemplarily, as shown in Figure 2 , the bottom of the raised seat cylinder 2 is fixed to the top of the oil tank 7 through a connecting piece (such as a screw), so that the raised seat cylinder 2 is sealingly connected with the oil tank 7. The top of the raised seat cylinder 2 forms a mounting disc, and the raised seat mounting flange 1 is fixed to the mounting disc on the top of the raised seat cylinder 2 through a connecting piece (such as a bolt), so that the raised seat mounting flange 1 is sealingly connected with the raised seat cylinder 2.

[0045] Through the above setting, the assembly of the raised seat 9 can be facilitated, and the bushing-type current transformer 4 can be pressed by the raised seat mounting flange 1.

[0046] In some embodiments, in combination with Figure 2 , the current transformer basin 3 is made of a metal material. A first annular insulating ring is arranged between the bushing-type current transformer 4 and the bottom wall of the current transformer basin 3. A second annular insulating ring is arranged between the bushing-type current transformer 4 and the raised seat mounting flange 1.

[0047] Exemplarily, the material of the current transformer basin 3 can be copper, iron, etc.

[0048] The materials of the first annular insulating ring and the second annular insulating ring can be the same, for example, both are epoxy resin, phenolic resin, etc.

[0049] Through the above arrangement, insulation between the bushing type current transformer 4 and the current transformer basin 3, and insulation between the bushing type current transformer 4 and the elevated seat mounting flange 1 can be achieved.

[0050] In some embodiments, a first through hole is formed in the bottom wall of the current transformer basin 3 to communicate the inside of the current transformer basin 3 with the inside of the oil tank 7. The first annular insulation ring is provided with a first oil channel, and the second annular insulation ring is provided with a second oil channel.

[0051] For example, the structure of the current transformer basin 3 can be a firm structure welded by a top annular mounting flange, a middle circular cylinder wall, and a lower annular supporting plate.

[0052] The insulating oil in the oil tank 7 can flow into the inside of the current transformer basin 3 through the first through hole and flood the bushing type current transformer 4 to provide insulation and heat dissipation for the bushing type current transformer 4.

[0053] For example, the first oil channel on the first annular insulation ring is arranged along the radial direction of the first annular insulation ring, and the second oil channel on the second annular insulation ring is arranged along the radial direction of the second annular insulation ring. The number of the first oil channel and the second oil channel can be multiple.

[0054] Through the above arrangement, the insulating oil can flow through the first annular insulation ring and the second annular insulation ring to take away the heat generated on the bushing type current transformer 4 and provide better insulation capacity for the bushing type current transformer 4.

[0055] In some embodiments, in combination Figure 2 , an insulation support plate is arranged between the outer edge of the bushing type current transformer 4 and the inner side wall of the current transformer basin 3.

[0056] For example, the material of the insulation support plate can be epoxy resin, phenolic resin, glass fiber, etc.

[0057] The number of the insulation support plates is multiple, and the multiple insulation support plates are sequentially and spacedly arranged along the outer edge of the bushing type current transformer 4, so that the bushing type current transformer 4 can be tightly supported from all around, the position of the bushing type current transformer 4 in the current transformer basin 3 can be kept stable, and displacement of the bushing type current transformer 4 in the radial direction can be avoided.

[0058] The insulation support plate can also leave a gap between the outer edge of the bushing type current transformer 4 and the inner side wall of the current transformer basin 3 to avoid direct contact between the bushing type current transformer 4 and the current transformer basin 3 and provide a flow space for the insulating oil.

[0059] In some embodiments, as Figure 2As shown, the number of bushing current transformers 4 is multiple, and the multiple bushing current transformers 4 are concentrically arranged along the height direction of the riser. An annular insulating paper is arranged between any two adjacent bushing current transformers 4.

[0060] For example, the multiple bushing current transformers 4 can have different protection ranges and functions, such as different current measurement accuracies and ranges, so as to meet the measurement requirements of different current measurement accuracies and ranges in actual applications.

[0061] The concentric arrangement of the multiple bushing current transformers 4 along the height direction of the riser facilitates the installation and maintenance of the bushing current transformers 4, reduces the electromagnetic interference between the bushing current transformers 4, ensures that each bushing current transformer 4 is in the same electromagnetic environment, and thus improves the accuracy and consistency of the measurement of the bushing current transformers 4.

[0062] For example, the material of the annular insulating paper can include wood fiber, polyester fiber, etc. The size of the annular insulating paper can be slightly larger than that of the bushing current transformer 4.

[0063] Through the above arrangement, the electromagnetic interference between the adjacent bushing current transformers 4 can be reduced, and the insulation between the adjacent bushing current transformers 4 can be realized.

[0064] In some embodiments, the riser cylinder 2 and the current transformer basin 3 are electrically connected through a wire.

[0065] For example, the riser cylinder 2 and the current transformer basin 3 are both provided with equipotential connection points, and the two equipotential connection points are electrically connected through a wire.

[0066] Through the above arrangement, the equipotential connection between the riser cylinder 2 and the current transformer basin 3 can be realized.

[0067] In some embodiments, the riser structure further includes a junction box 5. The junction box 5 is arranged outside the riser cylinder 2, and the lead of the bushing current transformer 4 is led out to the junction box 5 after passing through the riser cylinder 2.

[0068] For example, the junction box 5 is welded outside the riser cylinder 2. The riser cylinder 2 is provided with a second through hole corresponding to the position of the junction box 5, and the lead of the bushing current transformer 4 is led out to the junction box 5 after passing through the second through hole of the riser cylinder 2.

[0069] Through the above arrangement, the lead of the bushing current transformer 4 can be led out to the junction box 5, thereby facilitating the wiring of the bushing current transformer 4.

[0070] Embodiment 2:

[0071] The utility model embodiment further provides a transformer for power transmission line. The transformer comprises a transformer body and the raised seat structure in embodiment 1. The transformer body comprises an oil tank 7 and a winding in the oil tank 7. In combination with ​ The lead of the winding is led out to the outside through an insulating sleeve 6, and the insulating sleeve 6 is fixed on the raised seat 9 after sequentially passing through a current transformer basin 3, a bushing-type current transformer 4 and the top of the raised seat 9.

[0072] Exemplarily, the transformer is an oil-immersed transformer. The oil tank 7 is filled with insulating oil.

[0073] Exemplarily, the insulating sleeve 6 is sleeved outside the lead of the winding, the outside of the insulating sleeve 6 is provided with an annular flange, and a third through hole is formed in the top center position of the raised seat 9; the insulating sleeve 6 is fixed on the top of the raised seat 9 through the annular flange after passing through the third through hole, and the sealing connection between the insulating sleeve 6 and the raised seat 9 is realized.

[0074] The raised seat structure in embodiment 1 can make it unnecessary to replace the raised seat when the bushing-type current transformer 4 is replaced, so that the problem that the connecting gas pipe cannot be connected with the main connecting gas pipe due to the replacement of the raised seat can be avoided, thus the operation difficulty when the transformer replaces the bushing-type current transformer 4 can be simplified, the on-site construction time when the bushing-type current transformer 4 is replaced can be effectively shortened, the open-air time of the transformer body can be reduced, and the risk of the transformer being damp can be reduced.

[0075] It can be understood that the above embodiments are only exemplary embodiments for illustrating the principles of the utility model, and the utility model is not limited to this. For ordinary skilled persons in the art, various modifications and improvements can be made without departing from the spirit and essence of the utility model, and these modifications and improvements are also regarded as the protection scope of the utility model.

Claims

1. A raised seat structure, characterized by, The application relates to a transformer structure, which comprises the following parts: a lifting seat (9) fixed on the top of an oil tank (7) of a transformer and used for fixing the lead wire of the transformer; a current transformer basin (3) detachably arranged in the lifting seat (9); and a bushing-type current transformer (4) arranged on the bottom wall of the current transformer basin (3).

2. The elevated seat structure of claim 1, wherein An installation seat (8) is arranged on the inner side wall of the lifting seat (9), the installation seat (8) is annular, and the current transformer basin (3) is detachably arranged on the installation seat (8).

3. The elevated seat structure of claim 2, wherein, The lifting seat (9) comprises: a lifting seat cylinder (2), the bottom of the lifting seat cylinder (2) is fixed on the top of the oil tank (7), the installation seat (8) is arranged on the inner side wall of the lifting seat cylinder (2), and a lifting seat installation flange (1) arranged on the top of the lifting seat cylinder (2) and used for pressing the bushing-type current transformer (4).

4. The elevated seat structure of claim 3, wherein The current transformer basin (3) is made of metal material; A first annular insulation ring is arranged between the bushing-type current transformer (4) and the bottom wall of the current transformer basin (3), and a second annular insulation ring is arranged between the bushing-type current transformer (4) and the lifting seat installation flange (1).

5. The elevated seat structure of claim 4, wherein, A first through hole is arranged on the bottom wall of the current transformer basin (3) so that the inside of the current transformer basin (3) is communicated with the inside of the oil tank (7); A first oil channel is arranged on the first annular insulation ring, and a second oil channel is arranged on the second annular insulation ring.

6. The riser block structure of claim 5, wherein, An insulation supporting plate is arranged between the outer edge of the bushing-type current transformer (4) and the inner side wall of the current transformer basin (3).

7. The lifting seat structure according to claim 6, wherein the number of the bushing-type current transformers (4) is plural, the plural bushing-type current transformers (4) are concentrically arranged along the height direction of the lifting seat, and annular insulation paper is arranged between any two adjacent bushing-type current transformers (4).

8. The lifting seat structure according to any one of claims 4-7, wherein the lifting seat cylinder (2) and the current transformer basin (3) are electrically connected through a lead wire.

9. The riser structure according to any of claims 4-7, wherein a terminal box (5) is further arranged; the terminal box (5) is arranged outside the lifting seat cylinder (2), and the lead wire of the bushing-type current transformer (4) is led out to the terminal box (5) through the lifting seat cylinder (2).

10. A transformer, characterized by The application relates to a transformer structure, which comprises the following parts: a transformer body comprising an oil tank (7) and a winding in the oil tank (7); and the lifting seat structure according to any one of claims 1-9; the lead wire of the winding is led out to the outside through an insulation bushing (6), and the insulation bushing (6) is sequentially arranged through the current transformer basin (3), the bushing-type current transformer (4) and the top of the lifting seat (9) and is fixed on the lifting seat (9).

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