CN215897004U

CN215897004U - Intelligent transformer neutral point grounding resistance cabinet

Info

Publication number: CN215897004U
Application number: CN202121854711.7U
Authority: CN
Inventors: 苑国胜; 路东东; 安少龙; 杨丙辉
Original assignee: Baoding Longsheng Electric Co ltd
Current assignee: Baoding Longsheng Electric Co ltd
Priority date: 2021-08-10
Filing date: 2021-08-10
Publication date: 2022-02-22
Anticipated expiration: 2031-08-10

Abstract

The utility model discloses an intelligent transformer neutral point grounding resistance cabinet, and relates to the technical field of transformer neutral point grounding resistance cabinets. The utility model is provided with two heat dissipation devices, when the temperature in the cabinet body exceeds the threshold value set by the temperature sensor, the two heat dissipation devices work simultaneously, the driving motor works to drive the fan blades to rotate, the first heat dissipation holes are used for discharging hot gas in the cabinet body out of the cabinet body, meanwhile, the fan also starts to work, and the second heat dissipation holes are used for introducing external gas into the cabinet body, so that the gas flow in the cabinet body is accelerated, and thus, an air flow exchange is formed in the cabinet body, and the heat dissipation capability and the heat dissipation effect of the cabinet body are improved.

Description

Intelligent transformer neutral point grounding resistance cabinet

Technical Field

The utility model relates to the technical field of transformer neutral point grounding resistor cabinets, in particular to an intelligent transformer neutral point grounding resistor cabinet.

Background

The common neutral point grounding mode of the electric power system in China is as follows: the neutral point is directly grounded, the neutral point is not grounded, the neutral point is grounded through an arc suppression coil (resonance grounding), and the neutral point is grounded through a resistor. The grounding operation mode of the power system relates to a plurality of important problems of safe operation, power supply reliability, user power utilization safety and the like of a power grid. The technical field relates to a plurality of fields such as power systems, overvoltage and insulation matching, relay protection, communication and automatic control, electromagnetic compatibility, grounding design and the like, and the system is a system problem with wide content. The neutral point grounding resistance cabinet is divided into the following protection objects: transformer neutral grounding resistance cabinet and generator neutral grounding resistance cabinet. The neutral point is grounded through a resistor, namely a resistor is connected between the neutral point of the power grid and the ground in series. The resistance value of the connected resistor is properly selected, so that the energy of half-wave behind a single-phase grounding arc can be discharged, the possibility of reignition of the arc is reduced, the amplitude of overvoltage of a power grid is restrained, the sensitivity of the relay protection device can be improved to act on tripping, and the normal operation of a system is effectively protected. In ac networks, in particular networks supplied with cables, resistive earthing is increasingly used. The transformer neutral point grounding resistance cabinet is a complete set of grounding equipment including a grounding transformer, and can be installed in a plant power system of a power plant, a power supply system of a substation and a power distribution system of an industrial and mining enterprise to realize that the power grids adopt a system operation mode that a neutral point is grounded through a resistance.

The existing transformer neutral point grounding resistor cabinet device is usually provided with electrical equipment such as a grounding transformer, a current transformer, a resistor, an isolating switch and the like in a resistor cabinet, has a complex structure, is irradiated by sunlight when used outdoors, can quickly rise the internal temperature, has poor heat dissipation effect, and can obviously cause the aging problem of the insulation in the cabinet in the past and seriously influence the normal operation of a power grid.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an intelligent transformer neutral point grounding resistance cabinet, which aims to solve the problems that the existing transformer neutral point grounding resistance cabinet device provided in the background art is complex in structure, is irradiated by sunlight when being used outdoors, the internal temperature can be rapidly increased, the heat dissipation effect is poor, the insulation aging problem in the cabinet is obvious in the past, and the normal operation of a power grid is seriously influenced.

In order to achieve the above purposes, the technical scheme adopted by the utility model is as follows:

an intelligent transformer neutral point grounding resistance cabinet comprises a cabinet body and a cabinet door, wherein one side of the cabinet body is connected with a cabinet door hinge, the upper ends of the two sides of the cabinet body are respectively provided with a vent hole, the two sides of the cabinet body, which are positioned at the upper ends of the vent holes, are provided with a rain shielding plate, the two sides of the interior of the cabinet body are provided with a fixed plate, one side of the fixed plate is provided with a heat dissipation plate, the back of the cabinet body is provided with a first heat dissipation device, the first heat dissipation device comprises a first heat dissipation hole, a shell, a bracket, a driving motor and fan blades, the back of the cabinet body is provided with two first heat dissipation holes, the back of each first heat dissipation hole is in bolted connection with the shell, the bracket is fixedly installed inside the shell, one end of the bracket is fixedly installed with the driving motor, the output end of the driving motor is fixedly connected with the fan blades, and the fan blades are positioned corresponding to the first heat dissipation holes, and a temperature sensor is arranged in the center of the upper end in the cabinet body.

Preferably, the bottom of one side of the inside of the cabinet body is provided with a second heat dissipation device, the second heat dissipation device comprises a second heat dissipation hole, a mounting plate and a fan, the second heat dissipation hole is formed in the bottom of one side of the cabinet body, the mounting plate is arranged on one side, located in the second heat dissipation hole, of the cabinet body, the second heat dissipation hole penetrates through the cabinet body and the mounting plate, and the fan is arranged on one side surface of the mounting plate in a plurality.

Preferably, the observation window has been seted up to the upper end of cabinet door, the inside embedding of observation window has toughened glass, the opposite side middle part of cabinet door is provided with a latch fitting, the opposite side through-door latch fitting and the cabinet body swing joint of cabinet door.

Preferably, the inside of ventilation hole, first louvre and second louvre all is embedded into the dust screen.

Preferably, the number of the first heat dissipation devices is two, and the two first heat dissipation devices correspond to the two first heat dissipation holes respectively.

Compared with the prior art, the utility model provides an intelligent transformer neutral point grounding resistor cabinet, which has the following beneficial effects:

the utility model is provided with two heat dissipation devices, when the temperature in the cabinet body exceeds the threshold value set by the temperature sensor, the two heat dissipation devices work simultaneously, the driving motor works to drive the fan blades to rotate, the first heat dissipation holes are used for discharging hot gas in the cabinet body out of the cabinet body, meanwhile, the fan is also used for working, the second heat dissipation holes are used for introducing external gas into the cabinet body, and the gas flow in the cabinet body is accelerated, so that an airflow exchange is formed in the cabinet body, the heat dissipation capability and the heat dissipation effect of the cabinet body are further improved, the insulation aging in the cabinet is prevented, and the normal operation of a power grid is further realized.

Drawings

FIG. 1 is a schematic diagram of an intelligent transformer neutral point grounding resistor cabinet according to the present invention;

FIG. 2 is a schematic diagram of an internal structure of an intelligent transformer neutral grounding resistor cabinet according to the present invention;

FIG. 3 is a schematic cross-sectional view of an intelligent transformer neutral point grounding resistor cabinet according to the present invention;

the reference numbers in the figures are:

1. a cabinet body; 2. a cabinet door; 3. an observation window; 4. a door latch; 5. a dust screen; 6. a flashing; 7. a fixing plate; 8. a heat dissipation plate; 9. a vent hole; 10. a temperature sensor; 11. a first heat dissipation hole; 12. a second heat dissipation hole; 13. mounting a plate; 14. a fan; 15. a housing; 16. a support; 17. a drive motor; 18. a fan blade.

Detailed Description

The following description is presented to disclose the utility model so as to enable any person skilled in the art to practice the utility model. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.

Referring to fig. 1-3, an intelligent transformer neutral point grounding resistance cabinet comprises a cabinet body 1 and a cabinet door 2, wherein one side of the cabinet body 1 is hinged with the cabinet door 2, vent holes 9 are formed in the upper ends of the two sides of the cabinet body 1, rain shielding plates 6 are arranged on the two sides of the cabinet body 1 and positioned at the upper ends of the vent holes 9 and used for shielding rainwater so as to prevent rainwater from entering the interior of the cabinet body 1 from the vent holes 9 in rainy days, fixing plates 7 are arranged on the two sides of the interior of the cabinet body 1, a heat dissipation plate 8 is arranged on one side of each fixing plate 7 and used for improving the heat conduction capability of the cabinet body 1 so as to accelerate the heat dissipation capability and the heat dissipation effect of the cabinet body 1, a first heat dissipation device is arranged on the back of the cabinet body 1 and comprises first heat dissipation holes 11, a shell 15, a support 16, two first heat dissipation holes 11 are formed in the back of the cabinet body 1, the shell 15 is bolted on the back of the first heat dissipation device 11, the shell is used for protecting driving motor 17 and flabellum 18, the inside fixed mounting of shell 15 has support 16, the one end fixed mounting of support 16 has driving motor 17, support 16 is used for fixed driving motor 17, driving motor 17's output fixedly connected with flabellum 18, flabellum 18 be located corresponding with first louvre 11, driving motor 17 and flabellum 18 are all through support 16 fixed mounting in the inside of shell 15, the inside upper end central authorities department of the cabinet body 1 is provided with temperature sensor 10, temperature sensor 10 is used for the inside temperature of the real-time supervision cabinet body 1 to shore, and then make relative processing in time.

Specifically, the bottom of one side of the inside of the cabinet body 1 is provided with the second heat abstractor, the second heat abstractor includes second louvre 12, mounting panel 13 and fan 14, second louvre 12 has been seted up to one side bottom of the cabinet body 1, the one side that the cabinet body 1 inside is located second louvre 12 is provided with mounting panel 13, second louvre 12 runs through the cabinet body 1 and mounting panel 13, a side surface of mounting panel 13 is provided with a plurality of fans 14, a plurality of fans 14 are certain angle setting on the mounting panel 13, it is 50-70 to set up the angle, thereby blow the gas of the cabinet body 1 bottom to the cabinet body 1 upper segment, accelerate the inside gas flow of the cabinet body 1, and then improve the radiating effect of the cabinet body 1.

Concretely, observation window 3 has been seted up to the upper end of

cabinet door

2, 3 inside imbeds of observation window have toughened glass, the opposite side middle part of cabinet door 2 is provided with a latch fitting 4, the opposite side through-door latch fitting 4 and the cabinet body 1 swing joint of cabinet door 2, ventilation hole 9, the inside of first louvre 11 and second louvre 12 all imbeds has dust screen 5, prevent that the dust from ventilation hole 9 and louvre department get into the cabinet body 1 inside, cause the erosion to it, be used for protecting cabinet body 1, improve the life of the cabinet body 1.

Specifically, first heat abstractor's quantity is two, two first heat abstractor are corresponding in the position of two first louvres 11 respectively, temperature sensor 10 all with driving motor 17 and fan 14 electric connection, when the temperature of the internal portion of cabinet 1 surpassed the threshold value that temperature sensor 10 set for, temperature sensor 10 transmits the signal value to driving motor 17 and fan 14 in simultaneously, and then make driving motor 17 and fan 14 work immediately simultaneously, and then reach the fastest treatment effect, temperature sensor 10's model is LMT 88.

The working principle and the using process of the utility model are as follows: after the heat dissipation cabinet is installed, when the heat dissipation cabinet is used without errors after inspection, when the temperature inside the cabinet body 1 exceeds a threshold value set by the temperature sensor 10, the temperature sensor 10 simultaneously transmits a signal value to the driving motor 17 and the fan 14, the driving motor 17 and the fan 14 simultaneously work, the driving motor 17 works to drive the fan blades 18 to rotate, the hot gas inside the cabinet body 1 is discharged out of the cabinet body 1 through the first heat dissipation holes 11, meanwhile, the fan 14 also starts to work, the outside gas is introduced into the cabinet body 1 through the second heat dissipation holes 12, the gas flow inside the cabinet body 1 is accelerated, and therefore an air flow exchange is formed inside the cabinet body 1, the heat dissipation capacity and the heat dissipation effect of the cabinet body 1 are improved, insulation aging inside the cabinet is prevented, and the power grid is enabled to run normally.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the utility model, but that various changes and modifications may be made without departing from the spirit and scope of the utility model, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an intelligent transformer neutral point resistance to ground cabinet, includes the cabinet body (1) and cabinet door (2), its characterized in that: one side of the cabinet body (1) is hinged with the cabinet door (2), the upper ends of the two sides of the cabinet body (1) are respectively provided with a vent hole (9), the upper ends of the two sides of the cabinet body (1) which are positioned at the vent holes (9) are provided with a rain shielding plate (6), the two sides of the interior of the cabinet body (1) are provided with fixing plates (7), one side of each fixing plate (7) is provided with a heat dissipation plate (8), the back of the cabinet body (1) is provided with a first heat dissipation device, each first heat dissipation device comprises a first heat dissipation hole (11), a shell (15), a support (16), a driving motor (17) and fan blades (18), the back of the cabinet body (1) is provided with two first heat dissipation holes (11), the back of each first heat dissipation hole (11) is bolted with the shell (15), the interior of the shell (15) is fixedly provided with the support (16), one end of the support (16) is fixedly provided with the driving motor (17), the output end of the driving motor (17) is fixedly connected with fan blades (18), the fan blades (18) are located corresponding to the first heat dissipation holes (11), and a temperature sensor (10) is arranged at the center of the upper end of the cabinet body (1).

2. The intelligent transformer neutral grounding resistor cabinet according to claim 1, characterized in that: the utility model discloses a cabinet, including the cabinet body, the inside one side bottom of the cabinet body (1) is provided with second heat abstractor, second heat abstractor includes second louvre (12), mounting panel (13) and fan (14), second louvre (12) have been seted up to one side bottom of the cabinet body (1), the inside one side that is located second louvre (12) of the cabinet body (1) is provided with mounting panel (13), second louvre (12) run through the cabinet body (1) and mounting panel (13), a side surface of mounting panel (13) is provided with a plurality ofly fan (14).

3. The intelligent transformer neutral grounding resistor cabinet according to claim 1, characterized in that: observation window (3) have been seted up to the upper end of cabinet door (2), the inside embedding of observation window (3) has toughened glass, the opposite side middle part of cabinet door (2) is provided with door latch fitting (4), the opposite side of cabinet door (2) passes through door latch fitting (4) and the cabinet body (1) swing joint.

4. An intelligent transformer neutral grounding resistor cabinet according to claim 1 or 2, characterized in that: the inside of ventilation hole (9), first louvre (11) and second louvre (12) all is embedded into dust screen (5).

5. The intelligent transformer neutral grounding resistor cabinet according to claim 1, characterized in that: the number of the first heat dissipation devices is two, and the two first heat dissipation devices correspond to the positions of the two first heat dissipation holes (11) respectively.

6. The intelligent transformer neutral grounding resistor cabinet according to claim 1, characterized in that: the temperature sensors (10) are electrically connected with the driving motor (17) and the fan (14).

7. The intelligent transformer neutral grounding resistor cabinet according to claim 1, characterized in that: the model of the temperature sensor (10) is LMT 88.