Oil-immersed transformer with magnetic shielding structure

Abstract

The utility model relates to the technical field of oil-immersed transformers, in particular to an oil-immersed transformer with a magnetic shielding structure, which comprises a transformer shell, an upper fixing plate is mounted at the upper end of the transformer shell, and an exhaust mechanism for exhausting air in the transformer is mounted on the right side of the upper end of the upper fixing plate. A liquid storage mechanism used for storing oil liquid is installed on the left side of the upper fixing plate. And the exhaust mechanism comprises an exhaust pipe, the exhaust pipe communicates with the upper surface of the upper fixing plate, a fixing block is fixed in the exhaust pipe, a movable rod is slidably connected in the fixing block, and a connecting block is fixed to one end of the movable rod. And through the arranged exhaust mechanism, when the internal pressure of the transformer is too large, automatic air leakage can be achieved, when the internal pressure returns to normal, under the action of elasticity of a spring, a flow limiting plate is reset, a through hole is sealed, practicability is improved, and the internal pressure is prevented from being too large.

Description

Technical Field

[0001] The utility model relates to the technical field of oil-immersed transformers, in particular to an oil-immersed transformer with a magnetic shielding structure. Background Art

[0002] Oil-immersed transformer is a common type of power transformer. Its characteristics and working principle are of great significance to the stable operation of the power system. Oil-immersed transformer refers to a transformer that uses insulating oil as a cooling and insulating medium. It has good insulation performance and high temperature resistance, and its structure is relatively simple and easy to maintain. Oil-immersed transformer is mainly used in the power supply system of distribution cabinets. It can restore normal power supply by changing the operating state when the power supply of the power grid fails, effectively provide stable voltage and reduce line loss rate.

[0003] The existing oil-immersed transformer has internal oil in a static state for a long time. After the transformer has been working for a long time, the internal transformer oil will settle or the density will change, which will reduce the heat dissipation effect of the transformer and the sealing ability of the internal components.

[0004] The existing patent (publication number: CN213211899U) discloses an oil-immersed transformer, which includes a shell, and two stud holes are opened on the top of the shell. The two studs are rotated to make the return rod move up and down on the inner wall of the shell, so that the oil inside the shell is evenly mixed, the transformer can continue to work normally, is not easy to be damaged, is easier to dissipate heat, and better seals the internal components, thereby increasing the service life of the transformer.

[0005] In view of the above problems, although the solution given in the existing patent can mix the oil inside the casing to reduce the precipitation of the transformer oil, the transformer oil will absorb the heat of the transformer when in use, and there is no air discharge structure on the transformer. If the transformer is overheated and the pressure increases, it will cause damage to the internal parts, and the practicality is poor. Summary of the invention

[0006] The purpose of the utility model is to provide an oil-immersed transformer with a magnetic shielding structure, which can automatically release air when the internal pressure of the transformer is too high. When the internal pressure returns to normal, the current limiting plate is reset under the action of the elasticity of the spring itself, and the through hole is sealed, thereby improving practicality and avoiding excessive internal pressure, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the utility model provides the following technical solution: an oil-immersed transformer with a magnetic shielding structure, comprising a transformer housing, an upper fixing plate is installed at the upper end of the transformer housing, an exhaust mechanism for exhausting the inside of the transformer is installed on the right side of the upper end of the upper fixing plate, and a liquid storage mechanism for storing oil is installed on the left side of the upper fixing plate;

[0008] The exhaust mechanism includes an exhaust pipe, which is connected to the upper surface of the upper fixed plate. A fixed block is fixed inside the exhaust pipe, and a movable rod is slidably connected inside the fixed block. A connecting block is fixed to one end of the movable rod, and a spring abutting against the connecting block is sleeved on the outer surface of the movable rod. A limiting flow plate is fixed to the other end of the movable rod, and a through hole is opened inside the fixed block.

[0009] Preferably, a plurality of fixing bolts are fixed to the upper end of the upper fixing plate, and the ends of the fixing bolts are threadedly connected to threaded holes provided on the transformer housing.

[0010] Preferably, four lifting rings are fixed to the upper surface of the upper fixing plate, and two fixing seats are fixed to the lower surface of the transformer housing.

[0011] Preferably, heat dissipation fins are installed on the outer surface of the transformer housing, and the heat dissipation fins are connected to the transformer housing by screws.

[0012] Preferably, the liquid storage mechanism comprises a fixing frame, two fixing frames are provided, both of the two fixing frames are fixed on the left side of the upper fixing plate, and a liquid storage tank is fixed on the upper end of the fixing frame.

[0013] Preferably, the outer surface of the liquid storage tank is connected with a connecting pipe which is interconnected with the upper fixing plate, and the side wall of the liquid storage tank is inlaid with an observation window.

[0014] Preferably, a magnetic shielding layer is installed inside the transformer housing, and the magnetic shielding layer is connected to the transformer housing by screws.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The exhaust mechanism can automatically release air when the internal pressure of the transformer is too high. When the internal pressure returns to normal, the limiting plate is reset under the action of the spring's own elasticity to seal the through hole, thereby improving practicality and avoiding excessive internal pressure.

[0017] 2. A magnetic shielding layer is set up, which is made of a thin magnetic plate material and uses its magnetic resistance and other characteristics to achieve the effect of reducing the leakage magnetic field. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is the overall structural view of the utility model;

[0020] Figure 2 It is a schematic diagram of a half-section structure of the exhaust pipe of the utility model;

[0021] Figure 3 It is a schematic diagram of the half-section structure of the transformer housing of the utility model;

[0022] Figure 4 It is a three-dimensional structural schematic diagram of the liquid storage box of the utility model.

[0023] Description of reference numerals:

[0024] 1. Transformer housing; 2. Upper fixing plate; 3. Fixing bolts; 4. Exhaust pipe; 41. Fixing block; 42. Movable rod; 43. Spring; 44. Connecting block; 45. Current limiting plate; 46. Through hole; 5. Lifting ring; 6. Fixing seat; 7. Heat dissipation fin; 8. Fixing frame; 81. Liquid storage tank; 82. Connecting pipe; 83. Observation window; 9. Threaded hole; 10. Magnetic shielding layer. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The utility model provides a technical solution:

[0027] See also Figures 1 to 4 An oil-immersed transformer with a magnetic shielding structure comprises a transformer housing 1, an upper fixing plate 2 is installed at the upper end of the transformer housing 1, an exhaust mechanism for exhausting the inside of the transformer is installed on the right side of the upper end of the upper fixing plate 2, and a liquid storage mechanism for storing oil is installed on the left side of the upper fixing plate 2;

[0028] The exhaust mechanism includes an exhaust pipe 4, which is connected to the upper surface of the upper fixed plate 2. A fixed block 41 is fixed inside the exhaust pipe 4. A movable rod 42 is slidably connected inside the fixed block 41. A connecting block 44 is fixed to one end of the movable rod 42. A spring 43 abutting against the connecting block 44 is sleeved on the outer surface of the movable rod 42. A limiting plate 45 is fixed to the other end of the movable rod 42. A through hole 46 is opened inside the fixed block 41. A plurality of fixing bolts 3 are fixed to the upper end of the upper fixed plate 2. The ends of the fixing bolts 3 are threadedly connected to threaded holes 9 opened on the transformer housing 1. Four lifting rings 5 ​​are fixed to the upper surface of the upper fixed plate 2. Two fixing seats 6 are fixed to the lower surface of the transformer housing 1.

[0029] By adopting the above technical solution, before using the oil-immersed transformer with a magnetic shielding structure, the transformer housing 1 is first placed in a suitable position, and the fixing seat 6 provided on the transformer housing 1 is convenient for fixing the transformer, and the lifting ring 5 on the transformer housing 1 is convenient for lifting the transformer. When in use, the oil inside the transformer housing 1 will absorb heat, thereby increasing the pressure inside the transformer housing 1. The exhaust pipe 4 is provided so that the internal gas can enter the exhaust pipe 4. When the pressure exceeds the limit, the flow limiting plate 45 is pushed to move through the through hole 46 on the fixing block 41, thereby releasing the flow limiting of the through hole 46, so that the gas can be discharged to the outside through the exhaust pipe 4. When the internal pressure returns to normal, the spring 43 itself elastically pushes the connecting block 44 to reset, so that the movable rod 42 drives the flow limiting plate 45 to reset, and the through hole 46 is sealed to achieve the effect of automatic air release.

[0030] Specifically, Figure 1-Figure 4 As shown, the outer surface of the transformer housing 1 is installed with heat dissipation fins 7, and the heat dissipation fins 7 are connected to the transformer housing 1 by screws. The liquid storage mechanism includes a fixing frame 8, and two fixing frames 8 are provided. The two fixing frames 8 are fixed to the left side of the upper fixing plate 2. A liquid storage tank 81 is fixed to the upper end of the fixing frame 8. The outer surface of the liquid storage tank 81 is connected with a connecting pipe 82 that is interconnected with the upper fixing plate 2. The side wall of the liquid storage tank 81 is inlaid with an observation window 83. A magnetic shielding layer 10 is installed inside the transformer housing 1, and the magnetic shielding layer 10 is connected to the transformer housing 1 by screws.

[0031] By adopting the above technical solution, the upper fixing plate 2 is conveniently fixed by the fixing bolts 3 provided on the upper fixing plate 2 with the cooperation of the threaded holes 9, and the heat dissipation fins 7 on the transformer housing 1 can absorb the heat of the transformer housing 1, thereby realizing the effect of passive heat dissipation. The liquid storage tank 81 on the fixing frame 8 is convenient for storing oil, and the oil can enter the inside of the transformer through the connecting pipe 82. The observation window 83 is arranged to facilitate observation of the capacity of the oil in the liquid storage tank 81. The magnetic shielding layer 10 in the transformer housing 1 is made of a thin magnetic plate material, and its magnetic resistance and other characteristics are utilized to achieve the effect of reducing the leakage magnetic field.

[0032] Working principle: The fixing seat 6 arranged on the transformer housing 1 facilitates fixing the transformer. The oil inside the transformer housing 1 absorbs heat, which increases the pressure inside the transformer housing 1, and the internal gas can enter the exhaust pipe 4. When the pressure exceeds, the through hole 46 on the fixing block 41 will push the limiting plate 45 to move, so that the gas can be discharged to the outside through the exhaust pipe 4. When the internal pressure returns to normal, the spring 43 itself will push the connecting block 44 to reset under the action of its own elasticity, so that the movable rod 42 drives the limiting plate 45 to reset and seal the through hole 46. The heat dissipation fins 7 on the transformer housing 1 can absorb the heat of the transformer housing 1, thereby realizing the effect of passive heat dissipation. The liquid storage tank 81 on the fixing frame 8 facilitates the storage of the oil, and the oil can enter the transformer through the connecting pipe 82. The observation window 83 is arranged to facilitate the observation of the capacity of the oil in the liquid storage tank 81. The magnetic shielding layer 10 in the transformer housing 1 is made of a thin magnetic plate material, and its magnetic resistance and other characteristics are used to achieve the effect of reducing the leakage magnetic field.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An oil-immersed transformer with a magnetic shielding structure, comprising a transformer housing (1), characterized in that: An upper fixing plate (2) is installed at the upper end of the transformer housing (1); an exhaust mechanism for exhausting the inside of the transformer is installed on the right side of the upper end of the upper fixing plate (2); and a liquid storage mechanism for storing oil is installed on the left side of the upper fixing plate (2); The exhaust mechanism comprises an exhaust pipe (4), the exhaust pipe (4) being connected to the upper surface of the upper fixed plate (2), a fixed block (41) being fixed inside the exhaust pipe (4), a movable rod (42) being slidably connected inside the fixed block (41), a connecting block (44) being fixed at one end of the movable rod (42), a spring (43) being sleeved on the outer surface of the movable rod (42) being abutted against the connecting block (44), a limiting flow plate (45) being fixed at the other end of the movable rod (42), and a through hole (46) being opened inside the fixed block (41).

2. The oil-immersed transformer with a magnetic shielding structure according to claim 1, characterized in that: A plurality of fixing bolts (3) are fixed to the upper end of the upper fixing plate (2), and the ends of the fixing bolts (3) are threadedly connected to threaded holes (9) provided on the transformer housing (1).

3. The oil-immersed transformer with a magnetic shielding structure according to claim 1, characterized in that: Four lifting rings (5) are fixed to the upper surface of the upper fixing plate (2), and two fixing seats (6) are fixed to the lower surface of the transformer housing (1).

4. The oil-immersed transformer with a magnetic shielding structure according to claim 1, characterized in that: The outer surface of the transformer housing (1) is provided with heat dissipation fins (7), and the heat dissipation fins (7) and the transformer housing (1) are connected by screws.

5. The oil-immersed transformer with a magnetic shielding structure according to claim 1, characterized in that: The liquid storage mechanism comprises a fixing frame (8), two fixing frames (8) are provided, the two fixing frames (8) are both fixed on the left side of the upper fixing plate (2), and a liquid storage box (81) is fixed at the upper end of the fixing frame (8).

6. The oil-immersed transformer with a magnetic shielding structure according to claim 5, characterized in that: The outer surface of the liquid storage box (81) is connected to a connecting pipe (82) which is connected to the upper fixed plate (2), and the side wall of the liquid storage box (81) is inlaid with an observation window (83).

7. The oil-immersed transformer with a magnetic shielding structure according to claim 1, characterized in that: A magnetic shielding layer (10) is installed inside the transformer housing (1), and the magnetic shielding layer (10) and the transformer housing (1) are connected by screws.

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