On-load voltage regulation oil-immersed power transformer
By adopting a combined structure of guide fins and fixed fins in the transformer, and combining the design of heat conductor pipes and heat conductors, the problem of poor heat dissipation effect of existing transformer fins is solved, achieving more efficient heat dissipation effect and less dust accumulation.
Patent Information
- Application Number
- CN202411779511.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-04-15
AI Technical Summary
The fins of existing transformers have poor heat dissipation effect, which is easy to accumulate dust and debris, affecting the heat dissipation effect.
A load-load pressure-regulating oil-immersed power transformer is designed, adopting a combined structure of guide fins and fixed fins. The guide fins can be rotated to form an acute angle or parallel state with the fixed fins, increasing wind speed and air flow. At the same time, the design of heat conduction pipes and heat conduction sheets is used to enhance the heat dissipation effect by using cooling water and wind power.
The heat dissipation effect of the transformer is improved, the dust accumulation on the surface is reduced, and the heat dissipation ability is further enhanced through the design of the heat conduction pipe and the heat conduction sheet.
Smart Images
Figure CN119833285A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of transformer heat dissipation, and in particular to an on-load voltage-regulating oil-immersed power transformer. Background Art
[0002] On-load tap-changing main transformers are widely used in various power systems (power transmission, distribution, and power consumption). For example, they are used for power conversion in substations in power grid transmission stations, converting the voltage in high-voltage transmission lines into low-voltage power suitable for urban power consumption.
[0003] The on-load tap-changing oil-immersed power transformer is equipped with an iron core and windings in the main box for voltage conversion. The main box is filled with insulating oil to improve insulation performance and reduce temperature and noise. The existing transformer cooling structure is generally connected to the inside of the main box through a heat dissipation pipe. The insulating oil can flow and conduct heat in the heat dissipation pipe. The heat conduction outside the heat dissipation pipe connects the fins for natural heat dissipation. Generally, the natural heat dissipation capacity is limited and the heat dissipation effect is poor. Sometimes, fans are required for heat dissipation. Under the natural heat dissipation state, in order to improve the heat dissipation capacity, the fin density is generally increased as much as possible, but the higher the density, the better. In addition, in outdoor substations, dust and debris are easily accumulated on the upper and middle ends of high-density fins, further affecting the heat dissipation effect.
[0004] In the prior art, the fins have poor heat dissipation effect and are prone to accumulation of dust and debris, which affects the heat dissipation effect and needs to be solved. Summary of the invention
[0005] The technical problem to be solved by the present invention is to provide an on-load voltage-regulating oil-immersed power transformer in view of the above-mentioned technical deficiencies, which solves the problems in the prior art such as poor fin heat dissipation effect and easy accumulation of dust and debris that affect the heat dissipation effect.
[0006] The technical solution adopted by the present invention is: to provide an on-load voltage-regulating oil-immersed power transformer, comprising a main body box, wherein the upper part of the side of the main body box is connected with a plurality of upper heat dissipation pipes, and the upper heat dissipation pipes are provided with a plurality of fixed fins; characterized in that it also includes:
[0007] There are several guide fins, one of which is arranged between two adjacent fixed fins. The guide fin is rotatably arranged relative to the fixed fins. After the guide fins are rotated, they are parallel to or form an acute angle with the adjacent fixed fins.
[0008] Further optimization of this technical solution also includes:
[0009] A heat conducting pipe, the heat conducting pipe is located beside the upper heat dissipation pipe, and the outer wall of the heat conducting pipe is thermally connected to the outer wall of the upper heat dissipation pipe, and the heat conducting pipe passes through the fixed fin; a vertically arranged sleeve is provided in the middle of the guide fin, the sleeve is rotatably arranged on the heat conducting pipe, and the end of the sleeve extends into the interior of the heat conducting pipe.
[0010] Further optimizing the technical solution, the heat conducting pipe is connected to the external cooling water, the heat conducting pipe has a plurality of spherical shell parts connected in sequence, and the end of the sleeve extends into the spherical shell parts; further comprising:
[0011] There are a plurality of heat-conducting sheets, and the inner wall of the spherical shell is provided with a plurality of heat-conducting sheets at intervals along the vertical direction, and the heat-conducting sheets are sleeved on the outer wall of the sleeve.
[0012] To further optimize the technical solution, the heat pipe is located at the lower side of the upper heat dissipation pipe, and the heat pipe passes through the upper part of the fixed fin; the lower side of the spherical shell has a water leakage hole, the sleeve passes through the water leakage hole, and there is a gap between the sleeve and the inner wall of the water leakage hole.
[0013] Further optimization of this technical solution also includes:
[0014] There are several heat-conducting rods, the upper ends of which pass through the water leakage holes and are connected to the upper part of the heat-conducting pipes. The sleeves are rotatably sleeved on the outside of the heat-conducting rods, and the sleeves are connected to the heat-conducting rods by thermal conduction.
[0015] To further optimize the technical solution, a groove is provided in the middle of the upper end of the guide fin, the spherical shell portion is located in the groove, and the inner wall of the groove is in sliding contact with the outer wall of the spherical shell portion.
[0016] To further optimize the technical solution, a plurality of lower heat dissipation pipes are connected to the lower side of the main box, and the upper heat dissipation pipes and the lower heat dissipation pipes correspond one to another up and down; there are two heat conduction pipes, one heat conduction pipe is arranged on the lower side of the upper heat dissipation pipe, and one heat conduction pipe is arranged on the upper side of the lower heat dissipation pipe; the guide fins have the grooves on both the upper and lower sides, and the spherical shell parts on the upper and lower sides are respectively located in the grooves on the upper and lower sides.
[0017] To further optimize the technical solution, one end of the heat-conducting pipe on the upper side is sealed, and the other end is connected to the external cooling water; the heat-conducting pipe on the lower side is penetrated in the axial direction for guiding air.
[0018] Further optimizing the technical solution, the guide fin has a connecting rod; and further comprising:
[0019] The driving rod is movably arranged relative to the fixed fins, and the driving rod is provided with a plurality of connecting grooves, the connecting rod is located in the connecting grooves, and the driving rod is used to drive the guide fins to rotate.
[0020] The beneficial effects of the present invention are:
[0021] 1. After the guide fins rotate, they form an acute angle with the fixed fins. When facing the wind, they blow towards the closed shape, which is beneficial to increase the wind speed, accelerate heat dissipation, and reduce surface dust.
[0022] 2. When the guide fins rotate, the distance between them and the adjacent fixed fins is in a changing state, which is conducive to the fall of debris left above and mixed in the middle, reducing internal accumulation and maintaining a better heat dissipation state.
[0023] 3. The guide fins can be rotated slowly to achieve angle adjustment. When they rotate quickly and swing periodically, they can accelerate the flow of surrounding gas, improve the heat dissipation effect, and shake off debris. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a structural schematic diagram of the present invention;
[0025] Figure 2 It is a schematic diagram of the local structure of the present invention;
[0026] Figure 3 This is a schematic diagram of the structure of the guide fins and the fixed fins of the present invention viewed from above at an acute angle;
[0027] Figure 4 For the present invention Figure 3 Schematic diagram of the cross-sectional structure at the AA position;
[0028] Figure 5 For the present invention Figure 4 A schematic diagram of the local enlarged structure at point a in the middle;
[0029] Figure 6 It is a schematic diagram of a top view structure in which the guide fins and the fixed fins of the present invention are parallel to each other;
[0030] Figure 7 For the present invention Figure 6 Schematic diagram of the cross-sectional structure at the middle BB position;
[0031] Figure 8 For the present invention Figure 7 The schematic diagram of the local enlarged structure at b in the middle;
[0032] Fig. 9 For the present invention Figure 7 The schematic diagram of the local enlarged structure at c in the middle;
[0033] Fig.10It is a schematic diagram of the driving rod structure of the present invention;
[0034] Fig.11 It is a schematic diagram of the guide fin structure of the present invention;
[0035] Fig.12 It is a schematic diagram of the heat pipe installation structure of the present invention;
[0036] Markings in the figure: 1. Main box; 2. Upper heat dissipation pipe; 3. Fixed fin; 4. Guide fin; 401. Sleeve; 402. Groove; 403. Connecting rod; 5. Heat conduction pipe; 501. Spherical shell; 502. Heat conduction sheet; 503. Leakage hole; 6. Heat conduction rod; 7. Lower heat dissipation pipe; 8. Driving rod; 801. Connecting groove. DETAILED DESCRIPTION
[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0038] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".
[0039] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "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 a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0040] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
[0041] like Figure 1-12 As shown, an on-load voltage-regulating oil-immersed power transformer comprises a main body box 1, a plurality of upper heat dissipation tubes 2 are connected to the upper side of the main body box 1, and a plurality of fixed fins 3 are arranged on the upper heat dissipation tubes 2; and also comprises: a plurality of guide fins 4, a guide fin 4 is arranged between two adjacent fixed fins 3, the guide fins 4 are rotatably arranged relative to the fixed fins 3, and after the guide fins 4 are rotated, they are parallel to or form an acute angle with the adjacent fixed fins 3.
[0042] When in use, the guide fins 4 are rotatably arranged relative to the fixed fins 3, and both can be rotatably arranged. In this embodiment, the fixed fins 3 are fixed on the heat pipe, and the guide fins 4 are rotated, which can simplify the structure, and the fixed fins 3 are still connected to the upper heat pipe 2 using the existing connection method to achieve heat conduction connection. The heat conduction connection refers to a connection that can achieve heat conduction, such as a fixed connection to directly transfer heat, or an interval setting to achieve heat conduction through heat radiation.
[0043] like Figure 3 As shown, when the guide fin 4 rotates, it forms an acute angle with the adjacent fixed fin 3 to form a wind gathering port. When the wind blows in from the side with a larger opening, the wind speed can be increased. Compared with the parallel state, the structure in the acute angle state with the opening facing the wind has a better wind gathering effect. The guide fin 4 and the fixed fin 3 can be arranged in sequence at intervals. When the guide fin 4 rotates, it is in a swinging state. By swinging, the interval between the guide fin 4 and the adjacent fixed fin 3 is changed, and the sundries on the upper part and inside can be shaken off.
[0044] In order to enhance active heat dissipation, a blower may be provided on one side of the guide fin 4 to blow air toward the gap between the guide fin 4 and the fixed fin 3 .
[0045] Furthermore, it also includes: a heat conducting pipe 5, which is located beside the upper heat dissipation pipe 2, and the outer wall of the heat conducting pipe 5 is thermally connected to the outer wall of the upper heat dissipation pipe 2, and the heat conducting pipe 5 passes through the fixed fin 3; a vertically arranged sleeve 401 is provided in the middle of the guide fin 4, and the sleeve 401 is rotatably arranged on the heat conducting pipe 5, and the end of the sleeve 401 extends into the interior of the heat conducting pipe 5.
[0046] The heat-conducting pipe 5 is connected to the external cooling water, and has a plurality of spherical shell parts 501 connected in sequence, and the end of the sleeve 401 extends into the spherical shell part 501; it also includes: a plurality of heat-conducting sheets 502, and the inner wall of the spherical shell part 501 is provided with a plurality of heat-conducting sheets 502 at intervals along the vertical direction, and the heat-conducting sheets 502 are sleeved on the outer wall of the sleeve 401.
[0047] like Figure 5 As shown, when in use, the guide fins 4 are rotatably arranged on the heat pipe 5 through the sleeve 401, so that heat conduction can be realized. Heat conduction is carried out between the heat pipe 5 and the upper heat dissipation pipe 2, that is, the heat of the heat dissipation pipe can be transferred to the guide fins 4 for heat dissipation.
[0048] The sleeve 401 extends into the heat pipe 5 to enhance heat transfer, especially when the heat pipe 5 is connected to cooling water, it can enhance the cooling of the heat conducting fins and the fixed fins 3 as well as the cooling of the heat pipe. The heat pipe 5 has a spherical shell 501, which can increase the internal volume and make the cooling water more fully contact with the sleeve 401.
[0049] A plurality of heat conducting plates 502 may be disposed in each spherical shell portion 501, with intervals between the heat conducting plates 502 to facilitate the circulation of cooling water and enhance heat conduction. The heat conducting plates 502 are annular structures, with an outer ring connected to the inner wall of the spherical shell portion 501 and an inner ring tightly sleeved on the sleeve 401, which can enhance heat transfer with the sleeve 401 and better limit the sleeve 401.
[0050] Furthermore, the heat pipe 5 is located at the lower side of the upper heat dissipation pipe 2 and passes through the upper part of the fixed fin 3; the lower side of the spherical shell 501 has a water leakage hole 503, the sleeve 401 passes through the water leakage hole 503, and there is a gap between the sleeve 401 and the inner wall of the water leakage hole 503.
[0051] When in use, the upper heat pipe 2 is located at the upper side, and the cooling water in the heat pipe 5 can be dispersed to the guide fins 4 through the gap between the water leakage hole 503 at the lower part of the heat pipe 5 and the sleeve 401, which greatly enhances the heat dissipation. When the guide fins 4 swing and the wind blows, the cooling water will also splash onto the adjacent fixed fins 3 or the guide fins 4 and fixed fins 3 located at the downwind in the wind direction.
[0052] Adding cooling water and high-speed wind flow can help remove floating dust on the surface of the guide fins 4 and the fixed fins 3.
[0053] Furthermore, it also includes: a plurality of heat-conducting rods 6, the upper ends of the heat-conducting rods 6 pass through the water leakage holes 503 and are connected to the upper part of the heat-conducting pipe 5, the sleeves 401 are rotatably sleeved on the outside of the heat-conducting rods 6, and the sleeves 401 are connected to the heat-conducting rods 6 by thermal conduction.
[0054] When in use, the heat-conducting rod 6 can enhance the structural strength, and at the same time, can conduct heat and enhance heat dissipation. The sleeve 401 is tightly rotatably sleeved on the heat-conducting rod 6, so that the guide fins 4 are more stable and heat transfer can be performed at the same time. The upper end of the heat-conducting rod 6 is connected to the upper side wall of the heat-conducting pipe 5, and the heat-conducting pipe 5 directly transfers heat with the upper heat-dissipating pipe 2, which can conduct heat and improve the heat dissipation effect.
[0055] Furthermore, a groove 402 is provided in the middle of the upper end of the guide fin 4 , and the spherical shell portion 501 is located in the groove 402 , and the inner wall of the groove 402 is in sliding contact with the outer wall of the spherical shell portion 501 .
[0056] like Fig.11 As shown, when in use, the groove 402 on the guide fin 4 can be "U"-shaped, the spherical shell portion 501 corresponds to the groove 402 one by one, and the lower part of the inner wall of the groove 402 slides against the outer wall of the spherical shell portion 501. When the guide fin 4 rotates, the inner wall of the groove 402 is always in contact with the outer wall of the spherical shell portion 501, that is, it can always maintain good thermal contact with the heat pipe 5, thereby enhancing the thermal conduction effect.
[0057] Furthermore, a plurality of lower heat pipes 7 are connected to the lower side of the main box 1, and the upper heat pipes 2 and the lower heat pipes 7 correspond to each other. There are two heat pipes 5, one heat pipe 5 is arranged at the lower side of the upper heat pipe 2, and one heat pipe 5 is arranged at the upper side of the lower heat pipe 7. The guide fins 4 have grooves 402 on both the upper and lower sides, and the spherical shells 501 on the upper and lower sides are respectively located in the grooves 402 on the upper and lower sides. One end of the upper heat pipe 5 is sealed, and the other end is connected to the external cooling water; the lower heat pipe 5 is penetrated in the axial direction for guiding air.
[0058] When in use, heat pipes are generally provided on both sides of the main body box 1 of the transformer, namely, an upper heat pipe 2 and a lower heat pipe 7, and the upper and lower ends of the fixed fins 3 are respectively fixedly connected to the two heat pipes. One end of the upper heat pipe 5 can be blocked, and after being connected to the cooling water, the cooling water is injected, and the water can be drained to the guide fins 4 through the leak hole 503. The structure of the lower heat pipe 5 can be the same as that of the upper heat pipe 5, but the end is not blocked, and a heat conducting sheet 502 can also be provided inside, and the lower heat pipe 5 can be connected to the lower heat pipe 7 for thermal transmission.
[0059] When the wind direction is the same as the axial direction of the heat pipe 5, the wind can enter from the lower side of the heat pipe 5 and blow toward the main box 1. The wind enters the lower side of the heat pipe 5 to achieve cooling, effectively utilizing the natural wind in another direction (the gap between the fixed fins 3 and the guide fins 4 is natural wind in one direction when wind passes through it).
[0060] Furthermore, the guide fin 4 has a connecting rod 403 and also includes: a driving rod 8, which is movably arranged relative to the fixed fin 3, and has a plurality of connecting grooves 801 on the driving rod 8, and the connecting rod 403 is located in the connecting groove 801, and the driving rod 8 is used to drive the guide fin 4 to rotate.
[0061] When in use, the swing of the guide fin 4 can be driven in a variety of conventional ways. A connecting rod 403 can be provided on one side of the lower end of the guide fin 4, and the driving rod 8 is located below the guide fin 4. A connecting rod 403 is provided in each connecting groove 801 to slide and rotate. The driving rod 8 moves parallel to the axis direction of the heat conducting pipe 5 to drive the guide fin 4 to swing.
[0062] The driving rod 8 can be slidably arranged on the lower heat dissipation pipe 7 or the main box 1 through a bracket, etc. The driving rod 8 can be reciprocated linearly by a conventional driving device such as a linear reciprocating drive motor, which is a conventional technology and can be realized by those skilled in the art. At the same time, multiple driving rods 8 can be fixedly connected and move synchronously.
[0063] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.
Claims
1. An on-load voltage-regulating oil-immersed power transformer, comprising a main body box (1), wherein the upper side of the main body box (1) is connected to a plurality of upper heat dissipation pipes (2), and the upper heat dissipation pipes (2) are provided with a plurality of fixed fins (3); characterized in that: Also includes: A plurality of guide fins (4) are provided, one guide fin (4) being arranged between two adjacent fixed fins (3). The guide fin (4) is rotatably arranged relative to the fixed fin (3). After the guide fin (4) is rotated, it becomes parallel to or forms an acute angle with the adjacent fixed fin (3).
2. The on-load voltage-regulating oil-immersed power transformer according to claim 1, characterized in that: Also includes: A heat conducting pipe (5), the heat conducting pipe (5) is located beside the upper heat dissipation pipe (2), and the outer wall of the heat conducting pipe (5) is connected to the outer wall of the upper heat dissipation pipe (2) by thermal conduction, and the heat conducting pipe (5) passes through the fixed fin (3); a vertically arranged sleeve (401) is provided in the middle of the guide fin (4), the sleeve (401) is rotatably arranged on the heat conducting pipe (5), and the end of the sleeve (401) extends into the interior of the heat conducting pipe (5).
3. The on-load voltage-changing oil-immersed power transformer according to claim 2, characterized in that: The heat conducting pipe (5) is in communication with external cooling water, and the heat conducting pipe (5) has a plurality of spherical shell parts (501) that are in communication with each other in sequence, and the end of the sleeve (401) extends into the spherical shell part (501); and further comprises: There are a plurality of heat-conducting sheets (502), and the inner wall of the spherical shell (501) is provided with a plurality of heat-conducting sheets (502) at intervals along the vertical direction, and the heat-conducting sheets (502) are sleeved on the outer wall of the sleeve (401).
4. The on-load voltage-changing oil-immersed power transformer according to claim 3, characterized in that: The heat conducting pipe (5) is located at the lower side of the upper heat dissipation pipe (2), and the heat conducting pipe (5) passes through the upper part of the fixed fin (3); the lower side of the spherical shell (501) is provided with a water leakage hole (503), the sleeve (401) passes through the water leakage hole (503), and there is a gap between the sleeve (401) and the inner wall of the water leakage hole (503).
5. The on-load voltage-changing oil-immersed power transformer according to claim 4, characterized in that: Also includes: There are a plurality of heat-conducting rods (6), the upper ends of the heat-conducting rods (6) pass through the water leakage holes (503) and are connected to the upper part of the heat-conducting pipe (5), the sleeves (401) are rotatably sleeved on the outside of the heat-conducting rods (6), and the sleeves (401) are connected to the heat-conducting rods (6) by thermal conduction.
6. The on-load voltage-changing oil-immersed power transformer according to claim 3, characterized in that: The middle part of the upper end of the guide fin (4) is provided with a groove (402), the spherical shell portion (501) is located in the groove (402), and the inner wall of the groove (402) is in sliding contact with the outer wall of the spherical shell portion (501).
7. The on-load voltage-changing oil-immersed power transformer according to claim 6, characterized in that: The lower part of the side of the main body box (1) is connected to a plurality of lower heat dissipation pipes (7), and the upper heat dissipation pipes (2) and the lower heat dissipation pipes (7) correspond to each other in an upper and lower manner; there are two heat conduction pipes (5), one heat conduction pipe (5) is arranged on the lower side of the upper heat dissipation pipe (2), and one heat conduction pipe (5) is arranged on the upper side of the lower heat dissipation pipe (7); the guide fins (4) have grooves (402) on both upper and lower sides, and the spherical shell parts (501) on the upper and lower sides are respectively located in the grooves (402) on the upper and lower sides.
8. The on-load voltage-changing oil-immersed power transformer according to claim 7, characterized in that: One end of the heat-conducting pipe (5) on the upper side is sealed, and the other end is connected to external cooling water; the heat-conducting pipe (5) on the lower side is penetrated in the axial direction for guiding air.
9. The on-load voltage-changing oil-immersed power transformer according to claim 1, characterized in that: The guide fin (4) has a connecting rod (403); and further comprises: A driving rod (8) is movably arranged relative to the fixed fin (3), the driving rod (8) has a plurality of connecting grooves (801), the connecting rod (403) is located in the connecting grooves (801), and the driving rod (8) is used to drive the guide fin (4) to rotate.