阅读说明：本技术 一种变压器铁心的分解和装配方法 (Disassembling and assembling method of transformer iron core ) 是由 谈翀 郝娜 郭鹏鸿 季炜 杨仁毅 李吉栋 李红雨 杨华振 郭爱春 薛朋喜 于 2019-11-12 设计创作，主要内容包括：本发明涉及一种变压器铁心的分解和装配方法，将铁心的心柱从中心分为两个心柱分柱，分别将旁柱和与其相邻的心柱分柱通过U型铁心框打叠，打叠后每个U型铁心框单独绑扎、固定、运输，运到变电站现场厂房后通过新的运行上夹件将单独的U型铁心框合并为一个整体。本发明可以实现铁心的分解和合并；可以实现将变压器铁心分解为多个独立的U型铁心框，便于运输；在铁心分解后，解决了拉板绝缘、拉板、护槽等零部件的绝缘和装配问题，具有结构简单、操作方便、组装可靠稳固等优点。(The invention relates to a method for disassembling and assembling a transformer iron core, which is characterized in that a core column of the iron core is divided into two core column sub-columns from the center, side columns and core column sub-columns adjacent to the side columns are respectively overlapped through U-shaped iron core frames, each U-shaped iron core frame is independently bound, fixed and transported after being overlapped, and the independent U-shaped iron core frames are combined into a whole through a new operating upper clamping piece after being transported to a site plant of a transformer substation. The invention can realize the decomposition and combination of the iron cores; the transformer core can be decomposed into a plurality of independent U-shaped core frames, so that the transformer core is convenient to transport; after the iron core is disassembled, the problems of insulation of the pull plate, insulation of parts such as the pull plate, the protective groove and the like and assembly are solved, and the iron core has the advantages of simple structure, convenience in operation, reliability and stability in assembly and the like.)

1. A method for disassembling and assembling a transformer core is characterized in that a core column of the core is divided into two core column sub-columns from the center, side columns and core column sub-columns adjacent to the side columns are overlapped through U-shaped core frames respectively, each U-shaped core frame is independently bound, fixed and transported after being overlapped, and the independent U-shaped core frames are combined into a whole through a new clamp in operation after being transported to a factory building in a transformer substation.

2. A method of disassembling and assembling transformer cores according to claim 1, characterized by the steps of:

step 1, dividing a core column of an iron core into two core column sub-columns from the center, correspondingly, dividing a pulling plate insulator, a pulling plate and a protective groove into two parts from the center, and placing an insulating plate in an oil duct;

step 2, respectively overlapping the two side columns and the core column sub-columns adjacent to the side columns through U-shaped core frames, firstly placing the upper conveying clamping piece and the lower conveying clamping piece on an iron core overlapping platform, and starting the overlapping preparation work of each single U-shaped core frame 6;

step 3, sequentially placing the pull plate insulation, the pull plate and the protective groove on corresponding positions of the silicon steel sheet;

step 4, starting the overlapping work of each single U-shaped frame 6;

step 5, after the stacking is finished, clamping of each single U-shaped iron core frame is achieved through assembling of the reinforcing ribs, the locking screws and the side beams 11;

step 6, respectively and independently transporting the two U-shaped iron core frames;

step 7, combining two independent U-shaped iron core frames into a whole through a new operating upper clamp on the site of the transformer substation, and placing an insulating plate in the oil duct at the moment;

and 8, combining the two U-shaped iron core frames through the hovercraft and the lifting appliance, and overlapping the upper iron yoke by adopting a new integrally-operated upper clamping piece to complete the field assembly of the iron core.

3. A method of disassembling and assembling a transformer core according to claim 2, wherein the edges of said tie sheet insulation in step 1 are flush with the edges of said leg segments of said core, and said tie sheet insulation is made of a hot-pressed polyester resin plastic laminate; forming a groove at the arc of the pulling plate to ensure that the edge of the pulling plate is in an inscribed circle; the edge of the protective groove is used for protecting the pulling plate, and the material is preferably a hot-pressed polyester resin plastic laminated plate; the insulating plate is preferably 3mm thick and made of a hot-pressed polyester resin plastic laminate.

4. The method as claimed in claim 2, wherein the U-shaped core frame of step 2 is preferably a silicon steel sheet.

5. The method for disassembling and assembling transformer cores according to claim 2, wherein the step 4 is performed according to the sheet type of the silicon steel sheets obtained by the core calculation program and the lamination process specification.

6. A method of disassembling and assembling a transformer core according to claim 2, characterized in that said transporting upper clamp, said reinforcing ribs, said locking screws, said transporting lower clamp and said side members are preferably made of high strength steel.

7. A method for disassembling and assembling a transformer core according to claim 2, wherein the U-shaped core frame is bound, locked and reinforced with a polyester binding tape in step 7, and then the upper transporting clamp, the reinforcing rib, the locking screw, the lower transporting clamp and the side frame are removed and the upper transporting clamp is assembled to combine the two separate U-shaped core frames into a whole.

Technical Field

The invention belongs to the technical field of transformer production and manufacturing, and particularly relates to a method for disassembling and assembling a transformer core structure capable of being assembled on site.

Background

With the development of the ultra-high voltage transmission technology, the capacity of a single transformer is increased, so that the problems of overweight and out-of-limit of the transformer during transportation are caused. To solve this technical problem, an assembled in situ (ASA) transformer is generally used. The transformer has the advantages of low investment cost, small transportation weight and overall dimension, small occupied area, low operation and maintenance cost and the like, and is widely applied to the construction of power projects in transportation-limited areas.

In order to realize field assembly, the problem of decomposable transportation of the transformer core is firstly solved by the transformer, namely the transformer core is decomposed into a plurality of U-shaped core frames and upper iron yoke structures. The existing method for disassembling and assembling the transformer iron core is easy to cause the problems that the internal insulation of the iron core is unreliable, the mechanical strength during transportation is not satisfied, and the like, which seriously affect the performance of the transformer. Therefore, the present invention is directed to the above-mentioned disadvantages, and provides a method for assembling a transformer core on site, which facilitates the disassembly and assembly of the transformer core, ensures reliable insulation, and satisfies mechanical strength during transportation.

Disclosure of Invention

The invention provides a novel method for decomposing and assembling a transformer core structure capable of being assembled on site, which is characterized in that an iron core column with a larger diameter is decomposed into a plurality of independent U-shaped iron core frames, namely, the iron core column, a core column pull plate, a pull plate insulation, a protective groove and other parts are separated into two parts from the center of the iron core column, the two parts and adjacent side columns form an independent U-shaped iron core frame, each U-shaped iron core frame is independently bound and transported, and the separated U-shaped iron core frames are combined into a whole when the iron core column is transported to a transformer substation site plant. The method can realize the decomposition and combination of the iron cores with larger diameters, can finish the overlapping of the U-shaped iron core frames in a transformer manufacturer, meets the mechanical strength under the conditions of iron core decomposition, transportation and assembly, can be conveniently and quickly installed and fastened in a transformer substation field, can solve the problem of limited production, transportation and assembly of the extra-high voltage transformer, and ensures the power development of a limited area. The technical scheme adopted by the invention is as follows:

a method for disassembling and assembling a transformer iron core comprises the steps of dividing a core column of the iron core into two core column sub-columns from the center, respectively overlapping a side column and the core column sub-column adjacent to the side column through U-shaped iron core frames, independently binding, fixing and transporting each U-shaped iron core frame after overlapping, and combining the independent U-shaped iron core frames into a whole through a new operating upper clamping piece after being transported to a transformer substation site plant. The method specifically comprises the following steps:

step 1, dividing a core column of an iron core into two core column sub-columns from the center, correspondingly, dividing a pulling plate insulator, a pulling plate and a protective groove into two parts from the center, and placing an insulating plate in an oil duct;

step 2, respectively overlapping the two side columns and the core column sub-columns adjacent to the side columns through U-shaped core frames, firstly placing the upper conveying clamping piece and the lower conveying clamping piece on an iron core overlapping platform, and starting the overlapping preparation work of each single U-shaped core frame 6;

step 3, sequentially placing the pull plate insulation, the pull plate and the protective groove on corresponding positions of the silicon steel sheet;

step 4, starting the overlapping work of each single U-shaped frame 6;

step 5, after the stacking is finished, clamping of each single U-shaped iron core frame is achieved through assembling of the reinforcing ribs, the locking screws and the side beams 11;

step 6, respectively and independently transporting the two U-shaped iron core frames;

step 7, combining two independent U-shaped iron core frames into a whole through a new operating upper clamp on the site of the transformer substation, and placing an insulating plate in the oil duct at the moment;

and 8, combining the two U-shaped iron core frames through the hovercraft and the lifting appliance, and overlapping the upper iron yoke by adopting a new integrally-operated upper clamping piece to complete the field assembly of the iron core.

Preferably, the edge of the pulling plate insulation in the step 1 is flush with the edge of the core limb, and the material is a hot-pressed polyester resin plastic laminated board; forming a groove at the arc of the pulling plate to ensure that the edge of the pulling plate is in an inscribed circle; the edge of the protective groove is used for protecting the pulling plate, and the material is preferably a hot-pressed polyester resin plastic laminated plate; the insulating plate is preferably 3mm thick and made of a hot-pressed polyester resin plastic laminate.

Preferably, the U-shaped core frame in step 2 is preferably a silicon steel sheet.

Preferably, in the step 4, the iron core folding work can be performed according to the sheet type of the silicon steel sheet obtained by the iron core calculation program and the folding process specification.

Preferably, the materials of the upper transporting clamp, the reinforcing ribs, the locking screws, the lower transporting clamp and the side beams are high-strength steel.

Preferably, in the step 7, the U-shaped iron core frame is bound, locked and reinforced by a polyester binding belt, then the upper conveying clamp, the reinforcing ribs, the locking screws, the lower conveying clamp and the side beams are detached, and then the upper conveying clamp is assembled and operated, so that the two independent U-shaped iron core frames are combined into a whole.

The invention has the beneficial effects that:

(1) for a large-capacity extra-high voltage transformer with a large iron core diameter, the decomposition and combination of the iron cores can be realized.

(2) The transformer core can be decomposed into a plurality of independent U-shaped core frames, and transportation is facilitated.

(3) After the iron core is disassembled, the problems of insulation of the pull plate, insulation of parts such as the pull plate, the protective groove and the like and assembly are solved.

(4) After the iron core is disassembled, each U-shaped frame has enough mechanical strength by transporting the upper clamping piece, the reinforcing ribs, the locking screw rods, the side beams and other parts, so that the transportation requirement is met.

(5) On the site of the substation, several independent U-shaped frames are combined into a whole through a new operating upper clamping piece.

(6) The iron core decomposition and combination technology can be widely applied to the production and the manufacture of high-capacity extra-high voltage transformers, and has the advantages of simple structure, convenience in operation, reliability and stability in assembly and the like.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are specific embodiments of the invention, and that other drawings within the scope of the present application can be obtained by those skilled in the art without inventive effort.

Fig. 1 is a schematic core cross-sectional view of an exploded core leg in accordance with an embodiment of the present invention;

FIG. 2 is an enlarged view of the assembled detail of the core leg parts of the exploded core leg of the embodiment of the present invention;

FIG. 3 is a schematic view of the structure of the transport upper clamp;

FIG. 4 is a schematic view of a transport lower clamp;

FIG. 5 is an assembled front view of the U-shaped core frame of the embodiment of the present invention;

FIG. 6 is an assembled top view of a U-shaped core frame of an embodiment of the present invention;

FIG. 7a is a front view of a clip on operation configuration according to an embodiment of the present invention;

FIG. 7b is a top view of a clip on running configuration of an embodiment of the present invention;

FIG. 8 is a schematic view of the field assembly of an embodiment of the present invention;

in the figure, 1-core column, 2-pulling plate insulation, 3-pulling plate, 4-protection groove, 5-insulation plate, 6-independent U-shaped core frame, 7-transport upper clamp, 8-reinforcing rib, 9-locking screw, 10-transport lower clamp, 11-side beam and 12-operation upper clamp.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

A core structure for a transformer, generally comprising: single-phase three-column, single-phase five-column, and the like. For convenience of description, the embodiment of the present invention is described by taking a single-phase three-column (one core column and two side columns) as an example.

A method for disassembling and assembling a transformer core comprises the following steps:

step 1, dividing a core column 1 of an iron core into two core column sub-columns from the center, and correspondingly dividing parts such as a pull plate insulator 2, a pull plate 3, a protective groove 4 and the like into two parts from the center; because an oil channel is arranged between the two split core columns, an insulating plate 5 is arranged in the oil channel. Fig. 1 is a schematic cross-sectional view of an exploded core leg according to an embodiment of the present invention; fig. 2 is an enlarged view showing the assembly details of the respective parts of the core leg of the exploded core according to the embodiment of the present invention.

The edge of the pulling plate insulator 2 is flush with the edge of the core column of the iron core, and the pulling plate insulator is made of a hot-pressing polyester resin plastic laminated plate. The arc of the pulling plate 3 is provided with a groove, so that the edge of the pulling plate 3 is ensured to be in an inscribed circle and is convenient to bind and fix. The edge of the protective groove 4 is used for protecting the pulling plate 3, and the material is preferably hot-pressed polyester resin plastic laminated plates. The insulating plate 5 is preferably 3mm thick and made of a hot-pressed polyester resin plastic laminate.

After the iron core column 1 is decomposed, the pulling plate insulation 2, the pulling plate 3 and the protective groove 4 are separated along with the decomposition of the iron core column.

And 2, respectively overlapping the two side columns and the core column sub-columns adjacent to the side columns through the U-shaped core frame, firstly placing the upper conveying clamping piece 7 and the lower conveying clamping piece 10 on the core overlapping platform, and starting the overlapping preparation work of each single U-shaped core frame 6.

The U-shaped core frame 6 is preferably a silicon steel sheet, and functions and uses the same as those of a general transformer.

The U-shaped iron core frame 6 is folded for lying horizontally when being folded, and the iron core frame is erected after being folded, so that the transporting upper clamping piece 7 and the transporting lower clamping piece 10 are placed on the iron core folding platform synchronously, and then the iron core frame is folded.

As shown in fig. 3, it is a schematic structural view of the transport upper clamp 7; fig. 4 is a schematic structural view of the lower clip 10 for transportation.

Step 3, placing the pull plate insulator 2, the pull plate 3, the protective groove 4 and the like on corresponding positions of the silicon steel sheet according to the position sequence shown in the figure 2;

step 4, starting the overlapping work of each single U-shaped frame 6, and binding, fixing and transporting each U-shaped iron core frame independently after overlapping to be transported to a site plant of the transformer substation;

the iron core folding work can be carried out according to the silicon steel sheet shape obtained by the iron core calculation program and the folding process specification.

And 5, after the stacking is finished, clamping each single U-shaped iron core frame by assembling the reinforcing ribs 8, the locking screw rods 9, the side beams 11 and other parts. In order to ensure reliable transportation of each single U-shaped iron core frame, the materials of the parts such as the upper transportation clamping piece 7, the reinforcing ribs 8, the locking screw rods 9, the lower transportation clamping piece 10, the side beams 11 and the like are preferably high-strength steel.

FIG. 5 is a front view of the U-shaped core frame according to the embodiment of the present invention; fig. 6 is an assembled plan view of the U-shaped core frame according to the embodiment of the present invention. According to the assembly requirements of fig. 5 and 6, the components such as the reinforcing ribs 8, the locking screws 9, the side members 11 and the like are assembled.

Step 6, respectively and independently transporting the two U-shaped iron core frames;

and 7, combining the two independent U-shaped iron core frames into a whole through a new operating upper clamp 12 on the site of the transformer substation, wherein an 8mm oil channel is reserved between the two independent U-shaped iron core frames 6, and an insulating plate 5 is placed in the oil channel so as to separate 2U-shaped iron core frames 6.

The U-shaped iron core frame 6 needs to be bound, locked and reinforced by a polyester binding belt, then parts such as the transportation upper clamping piece 7, the reinforcing ribs 8, the locking screw rods 9, the transportation lower clamping piece 10, the side beams 11 and the like are disassembled, and then the transportation upper clamping piece 12 is assembled, so that the two independent U-shaped iron core frames are combined into a whole. FIG. 7a is a front view of a clip on operation configuration according to an embodiment of the present invention; fig. 7b is a top view of the clip on operation structure according to the embodiment of the present invention. The core is integrated by operating the upper clamp 12, ensuring the mechanical performance of the core during operation.

And 8, combining the two U-shaped iron core frames into one iron core frame, combining the two U-shaped iron core frames through tooling tools such as a hovercraft, a lifting appliance and the like, and overlapping the upper iron yoke by adopting a new integrally-operated upper clamping piece 12 to complete the field assembly of the iron core. Fig. 8 is a schematic diagram of the field assembly according to the embodiment of the present invention.

The novel method for disassembling and assembling the transformer core structure assembled on site solves the problem of difficulty in transportation of high-capacity ultra-high voltage transformers, realizes disassembly and combination of transformer cores, ensures mechanical strength during transportation, and has the advantages of simple structure, convenience in operation, reliability and stability in assembly and the like.

Finally, it is to be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, and the scope of the present invention is not limited thereto. Those skilled in the art will understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein.