Multi-oil-way transformer

Abstract

The utility model discloses a multi-oil-way transformer which comprises an iron core assembly, an insulation assembly and an insulation end ring. The iron core assembly comprises an iron core column, a voltage stabilizing coil and a low-voltage coil. The insulating assembly comprises a supporting strip, a first thick paper board, a first thin paper board, a second thick paper board, a second thin paper board, a first cushion block, a second cushion block and insulating end rings arranged at the bottoms of the voltage stabilizing coil and the low-voltage coil. The insulating end ring comprises a first paper ring, a second paper ring and a main cushion block; the first paper ring is arranged between the first cushion block and the main cushion block, and the second paper ring is arranged between the second cushion block and the main cushion block; the supporting strips are evenly distributed in the circumferential direction of the first paper ring and the second paper ring. The top end of the main cushion block is flush with the first paper ring. The utility model solves the problems of unsmooth oil path and overheating of the coil when the transformer runs. By improving the structure of the insulating end ring of the transformer body, on the premise of effectively ensuring that the end ring plays a supporting role, an oil path is enlarged, oil flow is smoother, and heat dissipation is more facilitated.

Description

Technical Field

[0001] The utility model relates to the field of transformer insulation, in particular to a multi-oil-way transformer. Background Art

[0002] The insulating end ring of a transformer with a conventional structure is usually made by pasting paper rings and pads: by evenly pasting a certain number of pads at the upper and lower ends of the paper ring, the support for the transformer coil and its insulating components can be achieved. In addition, a large amount of energy loss will occur during the operation of a large-capacity transformer, resulting in a huge amount of heat generated. If the system cannot be effectively cooled, its normal operation will be affected. To ensure the safe operation of the transformer, it is necessary to effectively increase the system oil circuit by reasonably designing the structure of the insulating end ring of the transformer body, so that the transformer oil can flow smoothly, and the excessive heat generated by the coil can be carried away, thereby ensuring the safe and stable operation of the system. Sometimes, however, there are still some defects in the structure of the insulating end ring of the transformer body, blocking part of the system oil circuit. Therefore, it is urgent to optimize the end ring structure to make the oil circuit smoother and achieve a better heat dissipation effect.

[0003] The end ring structure in the prior art is as Figure 1 shown. The conventional insulating end ring of the transformer body is pasted by a first paper ring 101, a transition paper ring 103, a second paper ring 102, and a number of pads with two different lengths and a main pad. Among them, the three paper rings are all in a closed ring shape, which can block the flow of transformer oil, guide the oil flow distribution of the system, and at the same time connect the upper and lower pads of the entire end ring. The pads support the spacers at each gear of the coil, and the transformer oil can flow through the gaps between two adjacent pads.

[0004] However, the settings of the first paper ring 101 and the transition paper ring 103 respectively block the transformer oil from entering the voltage stabilizing coil 201 and the low-voltage coil 202 to varying degrees, so that the heat generated by the coil during operation cannot be carried away, and there is a hidden danger that the system cannot operate normally due to overheating of the coil. Summary of the Utility Model

[0005] The utility model overcomes the deficiency that the end ring structure in the prior art cannot carry away the heat generated by the coil during operation, and there is a hidden danger that the system cannot operate normally due to overheating of the coil, and provides a multi-oil-way transformer. To achieve the above purpose, the technical solution adopted by the utility model is: a multi-oil-way transformer, which includes: an iron core assembly, an insulating assembly, and an insulating end ring;

[0006] The iron core assembly includes an iron core column, and a voltage stabilizing coil and a low-voltage coil wound around the iron core column;

[0007] The insulating component includes a first thick cardboard disposed on one side of the voltage stabilizing coil close to the core column, a first thin cardboard disposed on the other side of the voltage stabilizing coil, a second thick cardboard disposed on one side of the low-voltage coil close to the core column, a second thin cardboard disposed on the other side of the low-voltage coil, a plurality of uniformly distributed support bars disposed between the cardboard and the coil, a first cushion block disposed at the bottom of the voltage stabilizing coil and a second cushion block disposed at the bottom of the low-voltage coil, and an insulating end ring disposed at the bottoms of the voltage stabilizing coil and the low-voltage coil;

[0008] The insulating end ring includes a first paper ring, a second paper ring and a main cushion block;

[0009] The first paper ring is disposed between the first cushion block and the main cushion block, and the second paper ring is disposed between the second cushion block and the main cushion block; the support bars are uniformly arranged along the circumferences of the first paper ring and the second paper ring;

[0010] A step is provided on the main cushion block, and the top end of the step is at the same height as the top end of the first paper ring.

[0011] In a preferred embodiment of the present invention, support bars are provided between the first thick cardboard and the voltage stabilizing coil, between the first thin cardboard and the voltage stabilizing coil, between the second thick cardboard and the low-voltage coil, and between the low-voltage coil and the second thin cardboard.

[0012] In a preferred embodiment of the present invention, the bottom ends of the first thick cardboard, the second thick cardboard and the first cushion block are at the same height.

[0013] In a preferred embodiment of the present invention, the bottom ends of the first thin cardboard and the second thin cardboard, the bottom ends of the first paper ring and the second paper ring are at the same height.

[0014] In a preferred embodiment of the present invention, the insulating end ring further includes an oil separation cushion block disposed between the second cushion block and the second paper ring, and the top end of the oil separation cushion block is at the same height as the top end of the first paper ring.

[0015] In a preferred embodiment of the present invention, one end of the oil separation cushion block abuts against the lower part of the second thick cardboard, and the other end is aligned with one end of the second paper ring close to the second thin cardboard, and the second paper ring is located below the oil separation cushion block.

[0016] In a preferred embodiment of the present invention, a step is provided at the top of the main cushion block, the step is provided at one end of the main cushion block close to the core column, and the top end of the step abuts against the bottom end of the first thick cardboard.

[0017] In a preferred embodiment of the present utility model, one side of the step close to the first paper coil is located between the first thick cardboard and the first paper coil in a vertical plane.

[0018] In a preferred embodiment of the present utility model, the height of the step is equal to the height of the first paper coil.

[0019] The present utility model solves the defects existing in the background technology, and the present utility model has the following beneficial effects:

[0020] In the present utility model, a step is processed on the main cushion block, and its thickness is the same as that of the paper coil. At the same time, it is set that the first paper coil is only at the lower part of the end coil of the voltage stabilizing coil, the transition paper coil is cancelled, and the length of the oil separating cushion block is extended to the lower part of the second thick cardboard between the coil channels, so that the oil separating cushion block can support the cardboard between the channels. Referring to the oil flow distribution of the system, using the optimized insulating end coil will enable more transformer oil to flow into the left sides of the voltage stabilizing coil and the low-voltage coil, so as to more effectively take away the huge heat generated by the coil. The present utility model solves the problems of unsmooth oil circuit and overheating of the coil during the operation of the transformer. By improving the structure of the insulating end coil of the transformer body, while effectively ensuring that the end coil plays a supporting role, the oil circuit is increased, the oil flow is made smoother, and it is more beneficial to the heat dissipation during the operation of the coil. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0022] Figure 1 It is a schematic diagram of the oil flow distribution in the prior art;

[0023] Figure 2 It is a schematic diagram of the oil flow distribution of a multi-oil-circuit transformer described in an embodiment of the present utility model;

[0024] Figure 3 It is a schematic diagram of the arrangement of the main cushion blocks of a multi-oil-circuit transformer described in an embodiment of the present utility model;

[0025] Figure 4 It is a schematic diagram of the insulating end coil of a multi-oil-circuit transformer described in an embodiment of the present utility model.

[0026] The following is an explanation of the reference numerals:

[0027] 101 - The first paper coil; 102 - The second paper coil; 103 - The transition paper coil; 104 - The main cushion block; 1041 - The step; 105 - The oil - separating cushion block; 201 - The voltage - stabilizing coil; 202 - The low - voltage coil; 301 - The first thick cardboard; 302 - The first thin cardboard; 303 - The second thick cardboard; 304 - The second thin cardboard; 401 - The first cushion block; 402 - The second cushion block; 501 - The spacer bar. Detailed implementation mode

[0028] In order to more clearly understand the above - mentioned objects, features and advantages of the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific implementation modes. These drawings are all simplified schematic diagrams, only showing the basic structure of the present utility model in a schematic way, so they only show the components related to the present utility model. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0029] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the protection scope of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Therefore, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0030] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above - mentioned terms in the present application can be understood through specific situations.

[0031] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present utility model more thorough and comprehensive.

[0032] As Figure 2 shown, a multi-oil-circuit transformer includes: a core assembly, an insulation assembly, and an insulation end ring.

[0033] The core assembly includes a core column, and a voltage stabilizing coil 201 and a low-voltage coil 202 wound around the core column.

[0034] The insulation assembly includes a first thick cardboard 301 disposed on one side of the voltage stabilizing coil 201 close to the core column, a first thin cardboard 302 disposed on the other side of the voltage stabilizing coil 201, a second thick cardboard 303 disposed on one side of the low-voltage coil 202 close to the core column, a second thin cardboard 304 disposed on the other side of the low-voltage coil 202, a first spacer 401 disposed at the bottom of the voltage stabilizing coil 201 and a second spacer 402 disposed at the bottom of the low-voltage coil 202, and an insulation end ring disposed at the bottom of the voltage stabilizing coil 201 and the low-voltage coil 202.

[0035] Among them, spacers 501 are provided between the first thick cardboard 301 and the voltage stabilizing coil 201, between the first thin cardboard 302 and the voltage stabilizing coil 201, between the second thick cardboard 303 and the low-voltage coil 202, and between the low-voltage coil 202 and the second thin cardboard 304 to enhance the stability and insulation of the entire device.

[0036] In addition, in combination with Figures 2 to 4 , the insulation end ring includes a first paper ring, a second paper ring, a main spacer, and an oil separation spacer. Among them, the first paper ring 101 is disposed between the first spacer 401 and the main spacer 104, the second paper ring 102 is disposed between the second spacer 402 and the main spacer 104. Both the first paper ring 101 and the second paper ring 102 are annular, and all the spacers in the insulation end ring are evenly arranged along the circumferences of the first paper ring 101 and the second paper ring 102.

[0037] The topmost end of the main spacer 104 is at the same height as the top end of the first paper ring 101. The bottom ends of the first thick cardboard 301, the second thick cardboard 303, and the first spacer 401 are at the same height. The bottom ends of the first thin cardboard 302 and the second thin cardboard 304, the bottom ends of the first paper ring 101, and the bottom ends of the second paper ring 102 are at the same height. That is to say, the lengths of the first thick cardboard 301 and the second thick cardboard 303 are less than those of the first thin cardboard 302 and the second thin cardboard 304, and their staggered arrangement is conducive to the flow of transformer oil.

[0038] An oil-isolating pad 105 is also provided between the second pad 402 and the second paper ring 102, and the top of the oil-isolating pad 105 is at the same height as the top of the first paper ring 101. One end of the oil-isolating pad 105 is against the bottom of the second thick paperboard 303, and the other end is aligned with one end of the second paper ring 102 close to the second thin paperboard 304. The second paper ring is located below the oil-isolating pad 105 and is flush with the bottom of the oil-isolating pad.

[0039] Specifically, combined Figure 1 and Figure 2 As shown, the setting of the oil separator 105 can enlarge the oil path and form more oil passages for transformer oil. The difference between the oil separator 105 in the utility model and the oil separator 105 in the prior art is that the original transition paper ring 103 is cancelled, and the length of the oil separator 105 is only extended to below the second thick paperboard 303. In this way, the oil passing at this place is more convenient, and the efficiency of oil passing is enhanced.

[0040] Combination Figure 2 and Figure 4 As shown, a step 1041 is provided on the top of the main cushion block 104. The step 1041 is provided at one end of the main cushion block 104 close to the iron core column, and the top of the step 1041 abuts against the bottom of the first thick paperboard 301. The side of the step 1041 close to the first paper ring 101 is located between the first thick paperboard 301 and the first paper ring 101 on the vertical plane. The height of the step 1041 is equal to the height of the first paper ring 101.

[0041] It should be noted that the step 1041 does not contact the first paper ring 101, and a certain distance is left. In other words, a new oil flow channel can be added here. In addition, the size of the step 1041 is set strictly and reasonably, and the stability of the entire device is enhanced.

[0042] The utility model processes a step 1041 on the main pad 104, and its thickness is the same as the thickness of the paper ring. At the same time, the first paper ring 101 is set only at the lower part of the end ring of the voltage-stabilizing coil 201, the transition paper ring 103 is cancelled, and the length of the oil-isolating pad 105 is lengthened to below the second thick cardboard 303 between the coil channels, so that the insulating end ring can support the cardboard between the channels. Referring to the oil flow distribution of the system, the use of the optimized insulating end ring will allow more transformer oil to flow into the left side of the voltage-stabilizing coil 201 and the low-voltage coil 202, thereby more effectively taking away the huge heat generated by the coil. The utility model solves the problem of blocked oil circuit and overheating of the coil when the transformer is running to a certain extent. By improving the structure of the insulating end ring of the transformer body, the oil circuit is enlarged on the premise of effectively ensuring that the end ring plays a supporting role, so that the oil flow is smoother, which is more conducive to the heat dissipation of the coil when it is running.

[0043] The above embodiments only illustrate several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A multi-oil-circuit transformer, characterized in that, Comprising: An iron core assembly, an insulating assembly, and an insulating end ring; The iron core assembly includes an iron core column, a voltage stabilizing coil wound around the outside of the iron core column, and a low voltage coil; The insulating assembly includes a first thick cardboard disposed on one side of the voltage stabilizing coil close to the iron core column, a first thin cardboard disposed on the other side of the voltage stabilizing coil, a second thick cardboard disposed on one side of the low voltage coil close to the iron core column, a second thin cardboard disposed on the other side of the low voltage coil, a plurality of evenly distributed support bars disposed between the cardboard and the coil, a first spacer disposed at the bottom of the voltage stabilizing coil and a second spacer disposed at the bottom of the low voltage coil, and an insulating end ring disposed at the bottom of the voltage stabilizing coil and the low voltage coil; The insulating end ring includes a first paper ring, a second paper ring, and a main spacer; The first paper ring is disposed between the first spacer and the main spacer, and the second paper ring is disposed between the second spacer and the main spacer; the support bars are evenly arranged along the circumferences of the first paper ring and the second paper ring; The main spacer is provided with a step, and the top of the step is at the same height as the top of the first paper ring.

2. The multi-oil-circuit transformer according to claim 1, characterized in that: Support bars are disposed between the first thick cardboard and the voltage stabilizing coil, between the first thin cardboard and the voltage stabilizing coil, between the second thick cardboard and the low voltage coil, and between the low voltage coil and the second thin cardboard.

3. A multi-oil-circuit transformer according to claim 1, characterized in that: The bottom ends of the first thick cardboard, the second thick cardboard, and the first spacer are at the same height.

4. A multi-oil circuit transformer according to claim 1, characterized in that: The bottom ends of the first thin cardboard and the second thin cardboard, the bottom ends of the first paper ring and the second paper ring are at the same height.

5. A multi-oil circuit transformer according to claim 1, characterized in that: The insulating end ring further includes an oil separation spacer disposed between the second spacer and the second paper ring, and the top of the oil separation spacer is at the same height as the top of the first paper ring.

6. A multi-oil-circuit transformer according to claim 5, characterized in that: One end of the oil separation spacer abuts against the lower part of the second thick cardboard, and the other end is aligned with one end of the second paper ring close to the second thin cardboard, and the second paper ring is located below the oil separation spacer.

7. A multi-oil-circuit transformer according to claim 1, characterized in that: The top of the main spacer is provided with a step, the step is disposed at one end of the main spacer close to the iron core column, and the top of the step abuts against the bottom end of the first thick cardboard.

8. The multi-oil circuit transformer according to claim 7, wherein: One side of the step close to the first paper ring is located between the first thick cardboard and the first paper ring in a vertical plane.

9. A multi-oil-circuit transformer according to claim 7, characterized in that: The height of the step is equal to the height of the first paper ring.

Images