Silicon steel iron core of low-voltage transformer

Abstract

The silicon steel iron core of the low-voltage transformer comprises an iron core assembly and a heat dissipation assembly, the iron core assembly is formed by stacking a plurality of silicon steel sheets, the iron core assembly is assembled and fixed through a plurality of clamping rods, and a plurality of mounting holes are evenly formed in the surfaces of the silicon steel sheets. The heat dissipation assembly comprises a plurality of cooling fins and a plurality of heat dissipation oil tanks, the interior of each heat dissipation oil tank is divided into a low-temperature area and a high-temperature area through an upper partition plate and a lower partition plate, and the multiple cooling fins penetrate through the multiple mounting holes and extend to the high-temperature areas in the heat dissipation oil tanks correspondingly. According to the utility model, the cooling fins are arranged on the iron core assembly and are matched with the cooling oil tank, and the cooling oil in the low-temperature area and the cooling oil in the high-temperature area in the cooling oil tank are exchanged with each other, so that the purpose of rapidly reducing the oil temperature is achieved; therefore, the heat dissipation efficiency of the silicon steel iron core is improved, and the service life of the transformer is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer cores, in particular to a silicon steel core for a low-voltage transformer. Background Art

[0002] The transformer core is the main magnetic circuit part of the transformer. It is usually made of hot-rolled or cold-rolled silicon steel sheets with a high silicon content and coated with insulating paint on the surface. The transformer core is assembled and fixed by clamps.

[0003] For example, patent publication number CN220873381U discloses a transformer silicon steel core clamp, comprising an iron core body, a lower clamping rod, and an upper clamping rod. The iron core body is disposed between the lower and upper clamping rods; a connecting assembly is disposed between the lower and upper clamping rods, which is used to clamp the lower and upper clamping rods together to secure the iron core body. This transformer silicon steel core clamp, by adjusting a limit rod, adjusts the position of the movable rod, thereby adjusting the usable length of the connecting rod and movable rod, allowing for easy adjustment based on the requirements of the iron core body.

[0004] Regarding the above-mentioned related technologies, the inventors believe that most of the existing core clamps lack heat dissipation function, and the heat dissipation performance of the silicon steel core itself is poor, resulting in the heat of the silicon steel core not being able to be effectively dissipated during use, causing the transformer to malfunction and affecting its use. Utility Model Content

[0005] In order to solve the problems in the above background technology, the utility model provides a silicon steel core for a low-voltage transformer.

[0006] The utility model adopts the following technical solution: a low-voltage transformer silicon steel core, including an iron core assembly and a heat dissipation assembly, the iron core assembly is formed by stacking a plurality of silicon steel sheets, the iron core assembly is assembled and fixed by a plurality of clamping rods, a plurality of mounting holes are evenly opened on the surface of the silicon steel sheets, the heat dissipation assembly includes a plurality of heat sinks and a plurality of heat dissipation oil tanks, a plurality of the heat dissipation oil tanks are respectively fixedly mounted on the front and rear ends of the iron core assembly, the interior of the heat dissipation oil tank is divided into a low-temperature zone and a high-temperature zone by an upper partition and a lower partition, a plurality of the heat sinks respectively penetrate a plurality of the mounting holes and extend to the high-temperature zone in the heat dissipation oil tank, and the heat dissipation oil is transported between the low-temperature zone and the high-temperature zone by a transport assembly installed on the outer surface of the heat dissipation oil tank.

[0007] As a preferred embodiment of the present invention, the transport component includes an oil pump, one end of the oil pump is fixedly connected to the interior of the high-temperature zone, and the other end of the oil pump is fixedly connected to the interior of the low-temperature zone through a connecting pipe.

[0008] As a preferred embodiment of the present invention, the upper partition and the lower partition are vertically fixed on the same horizontal plane inside the heat dissipation oil tank, the upper partition and the lower partition are disconnected and connected by a filter plate, the filter plate is provided with filter holes, the upper partition is provided with a mounting groove, the mounting groove is provided with a screw rod and a baffle, the screw rod passes through the baffle and is rotatably connected to it, the upper end of the lower partition is provided with a positioning groove, the baffle extends downward through the mounting groove to the outside and is movably connected to the positioning groove.

[0009] As a preferred embodiment of the present invention, limiting rods are vertically fixed on both sides of the screw rod inside the installation groove, and limiting blocks are symmetrically fixed on both sides of the baffle near the top, and the limiting rods pass through the limiting blocks and are movably connected thereto.

[0010] As a preferred embodiment of the present invention, the upper end surface of the heat dissipation oil tank is rotatably connected to a turntable, and the rotating shaft of the turntable passes downward through the upper partition and is fixedly connected to the top end of the screw rod.

[0011] As a preferred embodiment of the present invention, four diagonal corners of the surface of the silicon steel sheet are respectively provided with insertion holes, and two through holes with the same diameter as the insertion holes are symmetrically provided on the surface of the clamping rod, and each of the insertion holes is respectively connected to a plug rod, which passes through the insertion holes and connects several silicon steel sheets into a stack, and both ends of the plug rod pass through the through holes and are threadedly connected with nuts.

[0012] As a preferred embodiment of the present invention, a plurality of fixing rods are provided at the upper and lower ends of the core assembly, a cavity is provided at each end of the fixing rod, a positioning block is movably connected in the cavity, and a positioning hole with a semicircular cross-sectional shape is provided on the end face of one side where the clamping rod is clamped with the fixing rod, and one end of the positioning block extends outward to the outside of the cavity and is consistent with the cross-sectional shape of the positioning hole.

[0013] As a preferred embodiment of the present invention, a spring is provided in the cavity, one end of the positioning block located in the cavity is fixedly connected to one end of the spring, and the other end of the spring is fixedly connected to the inner wall of the cavity.

[0014] As a preferred embodiment of the present invention, the cross-section of one end of the positioning block located in the cavity is T-shaped.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The utility model cooperates by installing a heat sink and a heat dissipation oil tank on the iron core assembly. The heat sink absorbs the heat inside the iron core assembly and dissipates it outwards. At the same time, the heat dissipation oil in the heat dissipation oil tank dissipates heat and cools the heat sink. The heat dissipation oil in the low-temperature zone and the high-temperature zone inside the heat dissipation oil tank are exchanged with each other, so the oil temperature is quickly lowered, thereby improving the heat dissipation efficiency of the silicon steel core and extending the service life of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the heat sink structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the silicon steel sheet structure of the present utility model;

[0020] Figure 4 This is a side cross-sectional view of the interior of the heat dissipation oil tank of the present utility model;

[0021] Figure 5 This is a schematic diagram of the structure of a partial component of the utility model;

[0022] Figure 6 This is a side cross-sectional view of the internal structure of the fixing rod of the present utility model.

[0023] In the figure: 1. Iron core assembly; 11. Silicon steel sheet; 12. Mounting hole; 13. Jack; 2. Heat dissipation assembly; 21. Heat sink; 22. Heat dissipation oil tank; 221. Turntable; 23. Upper partition; 231. Mounting slot; 231a. Screw rod; 231b. Baffle; 231c. Limit rod; 231d. Limit block; 24. Lower partition; 241. Positioning slot; 25. Low temperature zone; 26. High temperature zone; 27. Filter plate; 271. Filter hole; 3. Clamping rod; 31. Through hole; 32. Positioning hole; 4. Transport assembly; 41. Oil pump; 42. Connecting pipe; 5. Insert rod; 51. Nut; 6. Fixing rod; 61. Cavity; 62. Positioning block; 7. Spring. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly used by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0026] See also Figures 1 to 6 The utility model provides a low-voltage transformer silicon steel core, including an iron core assembly 1 and a heat dissipation assembly 2, wherein the iron core assembly 1 is formed by stacking a plurality of silicon steel sheets 11, and the iron core assembly 1 is assembled and fixed by a plurality of clamping rods 3, and a plurality of mounting holes 12 are evenly opened on the surface of the silicon steel sheet 11, and the heat dissipation assembly 2 includes a plurality of heat dissipation fins 21 and a plurality of heat dissipation oil tanks 22, and the plurality of heat dissipation oil tanks 22 are respectively fixedly mounted on the front and rear ends of the iron core assembly 1, and the interior of the heat dissipation oil tank 22 is divided into a low-temperature zone 25 and a high-temperature zone 26 by an upper partition 23 and a lower partition 24, and the plurality of heat dissipation fins 21 respectively penetrate the plurality of mounting holes 12 and extend to the high-temperature zone 26 in the heat dissipation oil tank 22, and the heat dissipation oil is transported between the low-temperature zone 25 and the high-temperature zone 26 by a transport assembly 4 installed on the outer surface of the heat dissipation oil tank 22. By installing the heat sink 21 and the heat dissipation oil tank 22 on the core assembly 1, the heat sink 21 absorbs the heat inside the core assembly 1 and dissipates it outward. At the same time, the heat dissipation oil in the heat dissipation oil tank 22 dissipates heat and cools the heat sink 21. The heat dissipation oil in the low-temperature zone 25 and the high-temperature zone 26 inside the heat dissipation oil tank 22 are exchanged with each other, so as to achieve the purpose of quickly lowering the oil temperature, thereby improving the heat dissipation efficiency of the silicon steel core.

[0027] See also Figure 1 The transport assembly 4 includes an oil pump 41. One end of the oil pump 41 is fixedly connected to the interior of the high-temperature zone 26, and the other end of the oil pump 41 is fixedly connected to the interior of the low-temperature zone 25 via a connecting pipe 42. Starting the oil pump 41 facilitates transferring the high-temperature oil in the high-temperature zone 26 to the low-temperature zone 25 via the connecting pipe 42, thereby rapidly cooling the oil.

[0028] See also Figures 1 to 4The upper partition 23 and the lower partition 24 are vertically fixedly mounted on the same horizontal plane within the heat dissipation oil tank 22. The upper partition 23 and the lower partition 24 are disconnected and connected by a filter plate 27. The filter plate 27 is provided with a filter hole 271. The upper partition 23 is provided with a mounting groove 231 within. A screw rod 231a and a baffle 231b are provided within the mounting groove 231. The screw rod 231a passes through the baffle 231b and is rotatably connected thereto. The upper end of the lower partition 24 is provided with a positioning groove 241. The baffle 231b extends downwardly through the mounting groove 231 and is movably connected thereto. By driving the screw rod 231a to rotate, the baffle 231b is driven to move into the mounting groove 231, thereby facilitating the flow of low-temperature oil to the high-temperature zone 26, thereby rapidly reducing the oil temperature. Impurities generated by the reused heat dissipation oil are filtered through the filter holes 271 on the filter plate 27. Within the mounting groove 231, limiting rods 231c are vertically fixed on either side of the screw rod 231a. Limiting blocks 231d are symmetrically fixed on either side of the baffle 231b near the top. The limiting rods 231c extend through the limiting blocks 231d and are movably connected thereto. The limiting rods 231c cooperate with the limiting blocks 231d to facilitate the rotation of the screw rod 231a, driving the baffle 231b up and down along the mounting groove 231. A turntable 221 is rotatably connected to the upper end surface of the heat dissipation oil tank 22. The rotating shaft of the turntable 221 extends downward through the upper partition 23 and is fixedly connected to the top of the screw rod 231a. The turntable 221 facilitates the rotation of the screw rod 231a, thereby driving the baffle 231b up and down.

[0029] Please pay attention to Figures 1 to 6 , the four diagonal corners of the surface of the silicon steel sheet 11 are respectively provided with insertion holes 13, and the surface of the clamping rod 3 is symmetrically provided with two through holes 31 with the same diameter as the insertion holes 13, and each of the insertion holes 13 is connected with a plug rod 5, which passes through the insertion holes 13 and connects several silicon steel sheets 11 into a pile. The plug rod 5 is used to facilitate the fixing and combination of multiple silicon steel sheets 11. The two ends of the plug rod 5 pass through the through hole 31 and are threadedly connected with nuts 51. By passing the plug rod 5 through the through hole 31, the plug rod 5 and the clamping rod 3 are connected to each other, and by tightening the nut 51, multiple silicon steel sheets 11 are fixed together and assembled into an iron core assembly 1.

[0030] Please pay attention to Figures 1 to 6The core assembly 1 is provided with multiple fixing rods 6 at the upper and lower ends. Each of the fixing rods 6 has a cavity 61 at each end. A positioning block 62 is movably connected within the cavity 61. A positioning hole 32 with a semicircular cross-section is provided on the end surface of the clamping rod 3 where it engages the fixing rod 6. One end of the positioning block 62 extends outward from the cavity 61 and conforms to the cross-sectional shape of the positioning hole 32. The provision of the positioning blocks 62 and positioning holes 32 with the same shape facilitates the connection between the positioning blocks 62 and the positioning holes 32, thereby securing the fixing rod 6 to the clamping rod 3. A spring 7 is provided within the cavity. One end of the positioning block 62 located within the cavity 61 is fixedly connected to one end of the spring 7, while the other end of the spring 7 is fixedly connected to the inner wall of the cavity 61. The elastic force of the spring 7 drives the positioning block 62 to slide outward from the cavity 61, facilitating its engagement with the positioning hole 32. The end of the positioning block 62 located within the cavity 61 has a T-shaped cross-sectional shape. The T-shaped design facilitates preventing the positioning block 62 from separating from the cavity 61 .

[0031] The implementation principle of the silicon steel core of a low-voltage transformer of the utility model is:

[0032] After stacking several silicon steel sheets 11 together, insert the insertion rods 5 into the insertion holes 13 respectively to connect the silicon steel sheets 11 together, then align the through holes 31 on the clamping rod 3 with the insertion rod 5 and tighten the nuts 51 to fix the front and rear ends of the core assembly 1, then clamp the fixing rod 6 between the clamping rods 3, and use the elastic force of the spring 7 to drive the positioning block 62 to slide out of the cavity 61 and connect with the positioning hole 32, thereby fixing the upper and lower ends of the core assembly 1 and completing the assembly of the core assembly 1; during the use of the silicon steel core, the heat sink 21 absorbs the heat inside the core assembly 1 and dissipates it outwards, and at the same time, the heat dissipation oil in the heat dissipation oil tank 22 synchronously dissipates heat and cools the heat sink 21; the heat dissipation oil The low-temperature zone 25 in the box 22 stores a portion of low-temperature oil. The heat dissipation oil in the high-temperature zone 26 gradually increases in temperature after long-term use, resulting in reduced heat dissipation efficiency. The oil pump 41 is started to transfer a portion of the high-temperature oil to the low-temperature zone 25 through the connecting pipe 42 and let it stand for a period of time. When the oil temperature drops, the turntable 221 is rotated to control the rotation of the screw rod 231a. The limit rod 231c cooperates with the limit block 231d to facilitate the rotation of the screw rod 231a while driving the baffle 231b to move into the installation groove 231, so that the low-temperature oil flows to the high-temperature zone 26 through the filter plate 27 to achieve the purpose of quickly lowering the oil temperature. The filter holes 271 on the filter plate 27 facilitate filtering of impurities generated by the heat dissipation oil.

[0033] The above description of the present invention is illustrative in combination with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A silicon steel core for a low-voltage transformer, comprising an iron core assembly (1) and a heat dissipation assembly (2), wherein the iron core assembly (1) is formed by stacking a plurality of silicon steel sheets (11), and is characterized in that: The core assembly (1) is assembled and fixed by a plurality of clamping rods (3); a plurality of mounting holes (12) are evenly opened on the surface of the silicon steel sheet (11); the heat dissipation assembly (2) includes a plurality of heat dissipation fins (21) and a plurality of heat dissipation oil tanks (22); the plurality of heat dissipation oil tanks (22) are respectively fixedly installed at the front and rear ends of the core assembly (1); the interior of the heat dissipation oil tank (22) is divided into a low-temperature zone (25) and a high-temperature zone (26) by an upper partition (23) and a lower partition (24); the plurality of heat dissipation fins (21) respectively pass through the plurality of mounting holes (12) and extend to the high-temperature zone (26) in the heat dissipation oil tank (22); the heat dissipation oil is transported between the low-temperature zone (25) and the high-temperature zone (26) by a transport assembly (4) installed on the outer surface of the heat dissipation oil tank (22).

2. The low voltage transformer silicon steel core according to claim 1, characterized in that: The transport assembly (4) includes an oil pump (41), one end of the oil pump (41) is fixedly connected to the interior of the high-temperature zone (26), and the other end of the oil pump (41) is fixedly connected to the interior of the low-temperature zone (25) through a connecting pipe (42).

3. The low voltage transformer silicon steel core according to claim 1, characterized in that: The upper partition (23) and the lower partition (24) are vertically fixedly mounted on the same horizontal plane inside the heat dissipation oil tank (22); the upper partition (23) and the lower partition (24) are in a disconnected structure and are connected through a filter plate (27); the filter plate (27) is provided with a filter hole (271); a mounting groove (231) is provided inside the upper partition (23); a screw rod (231a) and a baffle (231b) are provided inside the mounting groove (231); the screw rod (231a) passes through the baffle (231b) and is rotatably connected thereto; a positioning groove (241) is provided at the upper end of the lower partition (24); the baffle (231b) extends downward through the mounting groove (231) and is movably connected to the positioning groove (241).

4. The low voltage transformer silicon steel core according to claim 3, characterized in that: Limiting rods (231c) are vertically fixed on both sides of the screw rod (231a) inside the installation groove (231), and limiting blocks (231d) are symmetrically fixed on both sides of the baffle (231b) near the top. The limiting rods (231c) pass through the limiting blocks (231d) and are movably connected thereto.

5. The low voltage transformer silicon steel core according to claim 4, characterized in that: The upper end surface of the heat dissipation oil tank (22) is rotatably connected to a turntable (221), and the rotation axis of the turntable (221) passes through the upper partition (23) downward and is fixedly connected to the top end of the screw rod (231a).

6. The low voltage transformer silicon steel core according to claim 1, characterized in that: The four diagonal corners of the surface of the silicon steel sheet (11) are respectively provided with insertion holes (13), and the surface of the clamping rod (3) is symmetrically provided with two through holes (31) with the same diameter as the insertion holes (13). Each of the insertion holes (13) is connected with an insertion rod (5), and the insertion rod (5) passes through the insertion hole (13) and connects a plurality of silicon steel sheets (11) in series into a pile. The two ends of the insertion rod (5) pass through the through holes (31) and are threadedly connected with nuts (51).

7. The low voltage transformer silicon steel core according to claim 1, characterized in that: A plurality of fixing rods (6) are provided at the upper and lower ends of the core assembly (1), and cavities (61) are provided at both ends of the fixing rods (6). Positioning blocks (62) are movably connected in the cavities (61). A positioning hole (32) with a semicircular cross-section is provided on the end face of one side where the clamping rod (3) is clamped with the fixing rod (6), and one end of the positioning block (62) extends outward to the outside of the cavity (61) and is consistent with the cross-section shape of the positioning hole (32).

8. The low voltage transformer silicon steel core according to claim 7, characterized in that: A spring (7) is provided in the cavity, one end of the positioning block (62) located in the cavity (61) is fixedly connected to one end of the spring (7), and the other end of the spring (7) is fixedly connected to the inner wall of the cavity (61).

9. The low voltage transformer silicon steel core according to claim 8, characterized in that: The cross-section of one end of the positioning block (62) located in the cavity (61) is T-shaped.

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