Overvoltage prevention device of transformer substation

Abstract

The utility model relates to the technical field of transformer substations, and discloses an anti-overvoltage device of a transformer substation, which comprises a case, a dust filter screen, a heat dissipation fixture block, a refrigeration mechanism, a heat dissipation fan and an overvoltage protector, the overvoltage protector is arranged in the case, the heat dissipation fan is arranged on the right side in the case, and the dust filter screen is arranged in the case. A dust filter screen is installed at the position, at the right end of the machine box, of the right side of the cooling fan, a cooling clamping block is installed on the back face of the machine box, the cooling clamping block is attached to the overvoltage protector, a plurality of first cooling fins are installed on the cooling clamping block, and a refrigeration mechanism connected with the cooling clamping block is installed on the machine box. According to the utility model, the heat dissipation of the overvoltage protector is convenient, and the overheat phenomenon of the overvoltage protector is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer substations, in particular to an overvoltage protection device for transformer substations. Background Art

[0002] Substation, as the name implies, is a place where voltage is changed. It is a place in the power system where the voltage and current of electric energy are transformed, concentrated and distributed. In order to ensure the quality of electric energy and the safety of equipment, voltage adjustment, flow control (the flow and distribution of voltage, current and power in each node and branch of the power system) and protection of transmission and distribution lines and major electrical equipment are also required in the substation.

[0003] Since the voltage output by the substation will fluctuate, in order to prevent high voltage from damaging users' electrical appliances, the substation will use an overvoltage protector to regulate and protect the voltage.

[0004] Chinese patent CN220042703U discloses an overvoltage protection device for a transformer substation, including a voltage cabinet, one side of the voltage cabinet is rotatably connected with a rotating plate, the voltage cabinet is fixedly connected with four supporting blocks, and the voltage cabinet is provided with a clamping assembly inside. The clamping assembly includes a fixing seat, two fixing seats are provided, and the fixing seat is fixedly connected to the inside of the voltage cabinet. One side of the two fixing seats is fixedly connected with two fixing columns, and the outside of the fixing column is rotatably connected with a limiting plate. The utility model is provided with a clamping assembly, and the limiting plate and the fixing column in the clamping assembly cooperate with each other. Under the elastic force of the torsion spring, the limiting plate is helped to rotate under force. When the limiting plate and the connecting plate are fitted with each other, the overvoltage protection device is quickly limited, which is convenient for quickly installing the overvoltage protection device inside the box-type transformer substation for use, and the overvoltage protection device can also be quickly disassembled.

[0005] The above patent has poor heat dissipation for the overvoltage protection device when in use. Since the overvoltage protection device will generate a large amount of heat when regulating the high voltage, if the overvoltage protection device cannot be cooled in time, it will cause the overvoltage protection device to overheat, affecting the operation of electronic components in the overvoltage protection device and causing the overvoltage protection device to malfunction and be damaged. Therefore, in view of the above situation, it is urgent to develop an overvoltage protection device for substations that is convenient for heat dissipation of the overvoltage protector and prevent the overvoltage protector from overheating, so as to overcome the shortcomings in current practical applications and meet current needs. Utility Model Content

[0006] The utility model aims to provide an overvoltage protection device for a transformer substation, which is convenient for heat dissipation of an overvoltage protector and prevents the overvoltage protector from overheating.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] An overvoltage protection device for a substation comprises a chassis, a dust filter, a heat sink card, a refrigeration mechanism, a heat dissipation fan and an overvoltage protector, wherein the overvoltage protector is installed in the chassis, a heat dissipation fan is installed on the right side of the chassis, a dust filter is installed on the right side of the heat dissipation fan at the right end of the chassis, a heat dissipation card is installed on the back of the chassis, the heat dissipation card is fitted with the overvoltage protector, a plurality of first heat dissipation fins are installed on the heat dissipation card, a refrigeration mechanism connected to the heat dissipation card is installed on the chassis, and the refrigeration mechanism comprises: a power supply, a storage tube, a heat absorbing head, a semiconductor refrigeration sheet, a first wire, a second wire The power supply is installed on the top of the chassis, the storage tube is fixed to the inner top of the chassis, mercury is stored in the storage tube, a heat absorbing head in contact with the mercury is fixed to the bottom of the storage tube, the heat absorbing head is fitted with the top of the overvoltage protector, the cold end of the semiconductor refrigeration plate is fixed to the heat dissipation card block, the hot end of the semiconductor refrigeration plate is equipped with a second heat dissipation fin, the power supply is equipped with a first wire connected to the semiconductor refrigeration plate, the semiconductor refrigeration plate is equipped with a second wire inserted into the bottom end of the storage tube, and the power supply is equipped with a third wire inserted into the top end of the storage tube.

[0009] Preferably, an air outlet slot is arranged on the left side of the chassis, and the cooling fan faces the air outlet slot.

[0010] Preferably: the storage tube is made of insulating material.

[0011] Preferably, the first heat dissipation fins and the second heat dissipation fins are both located outside the chassis.

[0012] Preferably, the heat dissipation card block, the first heat dissipation fins, the heat absorption head and the second heat dissipation fins are all made of copper.

[0013] The beneficial effects of the utility model are as follows: when the overvoltage protection device of the substation is used, the voltage is regulated by the overvoltage protector to prevent the output voltage from being too high. At the same time, the cooling fan is in a continuously turned-on state, and the overvoltage protector is blown and cooled by the cooling fan. When the temperature of the overvoltage protector is too high, the heat absorbing head absorbs the heat on the overvoltage protector and transfers it to the mercury. The mercury expands due to the heat, so that the height of the mercury in the storage tube gradually rises. When the top of the mercury contacts the third wire, a loop is formed between the power supply, the first wire, the semiconductor cooling sheet, the second wire, the mercury and the third wire, so that the semiconductor cooling sheet starts to cool the heat dissipation card block, and the heat dissipation card block absorbs heat and cools the overvoltage protector, thereby preventing the overvoltage protector from overheating. When the temperature of the overvoltage protector gradually decreases, the mercury temperature decreases and contracts, so that the mercury is disconnected from the third wire, and then the semiconductor cooling sheet is turned off to save electricity. In summary, the utility model is convenient for heat dissipation of the overvoltage protector and prevents the overvoltage protector from overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front structural schematic diagram of the utility model.

[0015] Figure 2 It is a schematic diagram of the back structure of the utility model.

[0016] Figure 3 It is a partial structure diagram of the utility model Figure 1 .

[0017] Figure 4 It is a partial structure diagram of the utility model Figure 2 .

[0018] Figure 5 It is a partial structure diagram of the utility model Figure 3 .

[0019] Figure 6 It is a partial structure diagram of the utility model Figure 4 .

[0020] Figure 7 It is an internal cross-sectional view of the refrigeration mechanism in the utility model.

[0021] Legend:

[0022] 1. Chassis; 101. Air outlet slot; 2. Chassis door; 3. Dust filter; 4. Heat dissipation card block; 401. First heat dissipation fin; 5. Refrigeration mechanism; 501. Power supply; 502. Storage tube; 503. Heat absorption head; 504. Semiconductor refrigeration sheet; 5041. Second heat dissipation fin; 505. First wire; 506. Second wire; 507. Third wire; 508. Mercury; 6. Cooling fan; 7. Overvoltage protector. DETAILED DESCRIPTION

[0023] 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 of 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.

[0024] Specific examples are given below.

[0025] See also Figure 1 to Figure 7In the embodiment of the utility model, an overvoltage protection device for a substation includes a chassis 1, a dust filter 3, a heat dissipation card block 4, a refrigeration mechanism 5, a heat dissipation fan 6 and an overvoltage protector 7. A box door 2 is installed on the front side of the chassis 1, and the box door 2 is rotatably connected to the chassis 1 through a hinge. An overvoltage protector 7 is installed in the chassis 1. A heat dissipation fan 6 is installed on the right side of the chassis 1. A dust filter 3 is installed on the right side of the heat dissipation fan 6 at the right end of the chassis 1. An air outlet slot 101 is arranged on the left side of the chassis 1. The heat dissipation fan 6 faces the air outlet slot 101. A heat dissipation card block 4 is installed on the back of the chassis 1. The card block 4 is fitted with the overvoltage protector 7, and a plurality of first heat dissipation fins 401 are installed on the heat dissipation card block 4. A refrigeration mechanism 5 connected to the heat dissipation card block 4 is installed on the chassis 1. The refrigeration mechanism 5 includes: a power supply 501, a storage tube 502, a heat absorbing head 503, a semiconductor refrigeration sheet 504, a first wire 505, a second wire 506, a third wire 507 and mercury 508. The power supply 501 is installed on the top of the chassis 1, and the storage tube 502 is fixed to the inner top of the chassis 1. The storage tube 502 is made of insulating material, and mercury 508 is stored in the storage tube 502. The bottom of the semiconductor refrigeration sheet 504 is fixed with a heat absorbing head 503 in contact with mercury 508, and the heat absorbing head 503 is in contact with the top of the overvoltage protector 7. The cold end of the semiconductor refrigeration sheet 504 is fixed with the heat dissipation card block 4. The hot end of the semiconductor refrigeration sheet 504 is installed with a second heat dissipation fin 5041. The heat of the hot end of the semiconductor refrigeration sheet 504 is dissipated through the second heat dissipation fin 5041 to ensure the continuous cooling effect of the semiconductor refrigeration sheet 504. The power supply 501 is installed with a first wire 505 connected to the semiconductor refrigeration sheet 504. The semiconductor refrigeration sheet 504 is installed with a first wire 505 inserted into the storage tube 502. A second wire 506 is provided at the bottom of the power supply 501, and a third wire 507 is installed on the power supply 501 and is inserted into the top of the storage tube 502. At room temperature, the bottom of the third wire 507 does not contact the mercury 508. When in use, the overvoltage protector 7 regulates the voltage to prevent the output voltage from being too high. At the same time, the cooling fan 6 is in a continuously turned-on state, and the overvoltage protector 7 is cooled by the cooling fan 6. When the temperature of the overvoltage protector 7 is too high, the cooling mechanism 5 cools the heat dissipation block 4, and the heat dissipation block 4 absorbs heat and cools the overvoltage protector 7, thereby preventing the overvoltage protector 7 from overheating.

[0026] The first heat dissipation fin 401 and the second heat dissipation fin 5041 are both located outside the chassis 1 , and the heat dissipation block 4 , the first heat dissipation fin 401 , the heat absorbing head 503 and the second heat dissipation fin 5041 are all made of copper, so that they have good thermal conductivity.

[0027] Working principle: When the overvoltage protection device of the substation is in use, the overvoltage protector 7 regulates the voltage to prevent the output voltage from being too high. At the same time, the cooling fan 6 is in a continuously turned-on state, and the overvoltage protector 7 is cooled by the cooling fan 6. When the temperature of the overvoltage protector 7 is too high, the heat absorbing head 503 absorbs the heat from the overvoltage protector 7 and transfers it to the mercury 508. The mercury 508 expands due to the heat, causing the height of the mercury 508 in the storage tube 502 to gradually rise. When the top of the mercury 508 contacts the third wire 507, the power supply A loop is formed between 501, the first wire 505, the semiconductor cooling sheet 504, the second wire 506, the mercury 508 and the third wire 507, so that the semiconductor cooling sheet 504 starts to cool the heat sink block 4, and the heat sink block 4 absorbs heat and cools the overvoltage protector 7, thereby preventing the overvoltage protector 7 from overheating. When the temperature of the overvoltage protector 7 gradually decreases, the temperature of the mercury 508 decreases and contracts, so that the mercury 508 is disconnected from the third wire 507, and then the semiconductor cooling sheet 504 is turned off to save electricity.

[0028] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. An overvoltage protection device for a substation, characterized in that: The invention comprises a chassis (1), a dust filter (3), a heat sink block (4), a refrigeration mechanism (5), a heat dissipation fan (6) and an overvoltage protector (7), wherein the chassis (1) is provided with an overvoltage protector (7), a heat dissipation fan (6) is provided on the right side of the chassis (1), a dust filter (3) is provided on the right side of the heat dissipation fan (6) at the right end of the chassis (1), a heat dissipation block (4) is provided on the back side of the chassis (1), the heat dissipation block (4) is fitted with the overvoltage protector (7), a plurality of first heat dissipation fins (401) are provided on the heat dissipation block (4), and a refrigeration mechanism (5) connected to the heat dissipation block (4) is provided on the chassis (1), and the refrigeration mechanism (5) comprises: a power supply (501), a storage tube (502), a heat absorbing head (503), a semiconductor refrigeration sheet (504), a first wire (505), a second wire (506), a third wire (507) and mercury (508). 8), the power supply (501) is installed on the top of the chassis (1), the storage tube (502) is fixed to the inner top of the chassis (1), mercury (508) is stored in the storage tube (502), a heat absorbing head (503) in contact with the mercury (508) is fixed to the bottom of the storage tube (502), the heat absorbing head (503) is in contact with the top of the overvoltage protector (7), the cold end of the semiconductor cooling sheet (504) is in contact with the heat dissipation card block ( 4) are fixed to each other, the hot end of the semiconductor cooling sheet (504) is equipped with a second heat dissipation fin (5041), the power supply (501) is equipped with a first wire (505) connected to the semiconductor cooling sheet (504), the semiconductor cooling sheet (504) is equipped with a second wire (506) inserted into the bottom end of the storage tube (502), and the power supply (501) is equipped with a third wire (507) inserted into the top end of the storage tube (502).

2. The overvoltage protection device for a substation according to claim 1, characterized in that: An air outlet slot (101) is provided on the left side of the chassis (1), and the heat dissipation fan (6) faces the air outlet slot (101).

3. The overvoltage protection device for a substation according to claim 1, characterized in that: The storage tube (502) is made of insulating material.

4. The overvoltage protection device for a substation according to claim 1, characterized in that: The first heat dissipation fins (401) and the second heat dissipation fins (5041) are both located outside the chassis (1).

5. The overvoltage protection device for a substation according to claim 1, characterized in that: The heat dissipation card block (4), the first heat dissipation fin (401), the heat absorption head (503) and the second heat dissipation fin (5041) are all made of copper.

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