CN106449063A - On-load capacity-adjusting transformer good in heat dissipation and convenient to control - Google Patents

Abstract

The invention discloses an on-load capacity-regulating transformer with good heat dissipation and easy manipulation, which comprises a transformer body and an on-load capacity-regulating switch; the upper end of the transformer body is provided with a plurality of outlet columns, and the on-load capacity-regulating switch is installed on the transformer On the main body, an on-load capacity regulation switch is installed with an on-load capacity regulation controller, and the on-load capacity regulation controller is connected to the on-load capacity regulation switch; One end of the air duct communicates with the inner cavity of the transformer body, and the other end communicates with the outside world. A blower fan is installed in the port of the air supply duct that communicates with the outside world. The upper part of the side wall of the transformer body is also provided with a suction fan that communicates with the inner cavity of the transformer body. machine, there are a plurality of air supply pipes, and they are evenly spaced in the base. The on-load capacity-regulating transformer has a good heat dissipation effect, ensures that the internal electrical components of the on-load capacity-regulating transformer are in a normal working environment, and prolongs the service life of the on-load capacity-regulating transformer.

Description

On-load capacity regulating transformer with good heat dissipation and easy handling

technical field

The invention relates to the technical field of power equipment, in particular to an on-load capacity regulating transformer with good heat dissipation and easy manipulation.

Background technique

Transformer is an important power transmission and distribution equipment, which plays an irreplaceable role in power transmission and distribution lines. The load on the transmission and distribution line is highly unbalanced in time. If the capacity of the transformer is designed according to the maximum power load, it will cause a lot of no-load loss and resistance loss when the power consumption is low, which seriously violates the national policy of energy saving and emission reduction. If the capacity of the transformer is designed according to the normal power load, there will be serious hidden dangers in power consumption during peak power consumption. For this reason, capacity-adjusting transformers have appeared on the market.

The capacity regulating transformer is divided into no-load capacity regulating transformer and on-load capacity regulating transformer. The no-load capacity-adjusting transformer is suitable for seasonal load changes. When it is empty (or light) load, it can shift gears to reduce capacity, reduce the core loss of the transformer, and have obvious power-saving effects. However, due to the need for manual switching during power outages, its scope of convenience is limited, and it is suitable for users in rural areas, forest farms, and salt fields where the power consumption changes greatly and the change cycle is long. In order to make the capacity-adjusting transformer more energy-saving, more convenient to operate, and have a wider range of application, especially to adapt to users with shorter change cycles, the on-load capacity-adjusting transformer has been successfully developed. Existing on-load capacity regulating transformers generally use ventilation holes on the transformer to dissipate heat, and the heat dissipation effect is not good. If the internal electrical components of the on-load capacity-regulating transformer are in a high-temperature working environment for a long time, the performance of the on-load capacity-regulating transformer will be seriously affected. In addition, the existing on-load capacity regulating transformer is inconvenient to use. When manual capacity adjustment is required, it generally requires staff to arrive at the scene and adjust it through the control panel on the on-load capacity regulating transformer, which is not convenient enough. .

Contents of the invention

The object of the present invention is to provide an on-load capacity regulating transformer with good heat dissipation and easy to handle, so as to solve the problems raised in the above-mentioned background technology.

To achieve the above object, the present invention provides the following technical solutions:

An on-load capacity-regulating transformer with good heat dissipation and easy to control, including a transformer body and an on-load capacity-regulating switch; a plurality of outlet posts are arranged on the upper end of the transformer body, and an on-load capacity-regulating switch is installed on the transformer body, with An on-load capacity regulation switch is installed with an on-load capacity regulation controller, and the on-load capacity regulation controller is connected to the on-load capacity regulation switch; the bottom of the transformer body is also provided with a base, and an air supply pipe is arranged in the base, and one end of the air supply pipe is connected to the The inner cavity of the transformer body is connected, and the other end is connected to the outside world. A blower is installed in the port on the air supply pipe that communicates with the outside world. The upper part of the side wall of the transformer body is also provided with an exhaust fan that communicates with the inner cavity of the transformer body. There are a plurality of air supply pipes, and they are evenly spaced in the base; the on-load capacity regulation controller includes a first processing unit, a current collector, a voltage collector and a capacity regulation state monitoring unit; the current collector, voltage The collector, the capacity adjustment state monitoring unit and the on-load capacity adjustment switch are all connected to the first processing unit, and the capacity adjustment state monitoring unit is connected to the on-load capacity adjustment switch; the on-load capacity adjustment controller also includes a first control A panel and a first display unit, the first control panel and the first display unit are both connected to the first processing unit; the on-load capacity regulation controller also includes a first storage module, and the first storage module is connected to the first processing unit.

As a further solution of the present invention: the outlet post is provided with a lightning protection device.

As a further solution of the present invention: a protective cover is installed on the transformer body, and the on-load capacity regulation controller and the on-load capacity regulation switch are located in the protective cover.

As a further solution of the present invention: a filter screen is provided at the port communicating with the outside world on the air supply pipe, the filter screen is located outside the blower fan, and the blower fan communicates with the outside world through the filter screen.

As a further solution of the present invention: the base is also provided with a fire extinguisher, the fire extinguisher is provided with a blowing main pipe, the upper part of the blowing main pipe is provided with a blowing branch pipe connected to it, and the front end of the blowing branch pipe extends into the air supply pipe. And the blowing branch pipe is provided with blowing holes on the pipe section in the air supply pipe, the quantity of the blowing branch pipe is the same as the quantity of the air supply pipe, and the two correspond one by one, and the fire extinguishing solenoid valve is installed on the blowing main pipe.

As a further solution of the present invention: the transformer body is also provided with a temperature sensor and a smoke sensor, both the temperature sensor and the smoke sensor are connected to the first processing unit by communication, and the first processing unit controls the connection of the air blower, the exhaust fan and the fire extinguishing solenoid valve .

As a further solution of the present invention: the upper end of the fire extinguisher body is also provided with an alarm, and the first processing unit is connected to the alarm.

As a further solution of the present invention: the on-load capacity-regulating controller also includes a first ZigBee communication module, and the on-load capacity-regulating transformer with good heat dissipation and easy manipulation also includes a handheld terminal and a first processing unit Communication is connected to the handheld terminal through the first ZigBee communication module; the handheld terminal includes a second processing unit and a second ZigBee communication module matched with the first ZigBee communication module, and the second ZigBee communication module is connected with the second processing unit; The handheld terminal further includes a second control panel and a second display unit, both of which are connected to the second processing unit.

As a further solution of the present invention: the handheld terminal further includes a second storage module connected to the second processing unit; the handheld terminal further includes a USB interface module.

As a further solution of the present invention: the handheld terminal further includes a power module connected to the second processing unit.

Compared with prior art, the beneficial effect of the present invention is:

1. The on-load capacity regulating transformer realizes the rapid flow of air in the transformer through the cooperation of the blower fan and the exhaust fan. The fast-flowing air will take away the heat of the transformer, so as to achieve the purpose of rapid heat dissipation and cooling inside the transformer, and the heat dissipation effect is good. , to ensure that the internal electrical components of the on-load capacity regulating transformer are in a normal working environment, and prolong the service life of the on-load capacity regulating transformer;

2. The on-load capacity-regulating transformer can detect the operating status of the on-load capacity-regulating transformer through a handheld terminal, and realize various control operations, which is convenient to use;

3. The on-load capacity-regulating transformer is equipped with a fire extinguisher inside, which can eliminate most of the fire in the bud, and has high safety, and the on-load capacity-regulating transformer can timely alarm the fire or fault information, so as to facilitate The staff were notified and dealt with in a timely manner to avoid greater losses.

Description of drawings

Figure 1 is a schematic structural diagram of an on-load capacity regulating transformer with good heat dissipation and easy handling.

Figure 2 is a schematic diagram of the electrical connection of an on-load capacity regulating transformer with good heat dissipation and easy handling.

Fig. 3 is a schematic structural diagram of a handheld terminal in an on-load capacity regulating transformer with good heat dissipation and easy manipulation.

In the figure: 1-transformer body, 2-base, 3-filter, 4-blower, 5-air pipe, 6-injection hole, 7-injection branch pipe, 8-fire extinguisher, 9-injection main pipe, 10 -Fire extinguishing solenoid valve, 11-temperature sensor, 12-exhauster fan, 13-protective cover, 14-on-load capacity adjustment switch, 15-on-load capacity adjustment controller, 16-outlet column, 17-alarm, 18-smoke Sensor, 19-first processing unit, 20-current collector, 21-voltage collector, 22-capacity regulation status monitoring unit, 23-first control panel, 24-first display unit, 25-first storage module, 26-First ZigBee communication module, 27-Handheld terminal, 28-Second processing unit, 29-Second storage module, 30-Second control panel, 31-Second display unit, 32-USB interface module, 33-Power supply Module, 34—the second ZigBee communication module.

detailed description

The technical solutions of the present invention will be further described in detail below in conjunction with specific embodiments.

Please refer to Figures 1-3, an on-load capacity-regulating transformer with good heat dissipation and easy to control, including a transformer body 1 and an on-load capacity-regulating switch 14; the upper end of the transformer body 1 is provided with a plurality of outlet posts 16, so A lightning protection device is provided on the outlet column 16 to prevent the on-load capacity-regulating transformer from being damaged due to lightning strikes. 15, the on-load capacity regulation controller 15 is connected to the on-load capacity regulation switch 14, and the on-load capacity regulation controller 15 is used to control the operation of the on-load capacity regulation switch 14 to control the capacity change of the transformer. The transformer body 1 A protective cover 13 is also installed on it, and the on-load capacity regulation controller 15 and the on-load capacity regulation switch 14 are located in the protective cover 13, and the protective cover 13 is used to provide the on-load capacity regulation controller 15 and the on-load capacity regulation switch 14. Protect;

The bottom of the transformer body 1 is also provided with a base 2, the base 2 is provided with an air supply pipe 5, one end of the air supply pipe 5 is connected to the inner cavity of the transformer body 1, and the other end is connected to the outside world, and the air supply pipe 5 is connected to the outside world. A blower 4 is arranged in the connected port, and an exhaust fan 12 connected with the inner cavity of the transformer body 1 is also arranged on the upper part of the side wall of the transformer body 1. The blower 4 sends the outside air into the air supply pipe 5, and the air passes through the air supply. The tube 5 is sent into the transformer body 1, and the exhaust fan 12 draws out the air in the transformer body 1, and the air takes away the heat of the transformer body 1 during the process of flowing through the transformer body 1, so as to achieve the purpose of cooling the inside of the transformer body 1; Filter screen 3 is also arranged at the port that communicates with the outside world on the described air supply pipe 5, and filter screen 3 is positioned at the outside of air blower 4, and air blower 4 communicates with the outside world through filter screen 3, and the air of outside passes through filter screen under the effect of air blower 4 3 enters the air supply pipe 5, and the air is flowing through the filter screen 3, the filter screen 3 can filter out the dust and sundries carried in the air, so as to ensure the cleanliness of the inside of the transformer body 1; the air supply pipe 5 The number is not limited. In this embodiment, preferably, there are multiple air supply pipes 5, and they are evenly spaced in the base 2;

The base 2 is also provided with a fire extinguisher 8, the fire extinguisher 8 is provided with a spray main pipe 9, and the upper part of the spray main pipe 9 is provided with a spray branch pipe 7 connected thereto, and the front end of the spray branch pipe 7 extends into the air supply pipe 5 , and the blowing branch pipe 7 is located on the pipe section in the air supply pipe 5 and has a blowing hole 6, the number of the blowing branch pipe 7 is the same as the number of the air supply pipe 5, and the two are in one-to-one correspondence, and the blowing main pipe 9 is installed There is a fire extinguishing solenoid valve 10. When a fire occurs in the transformer body 1, the fire extinguishing solenoid valve 10 is controlled to open, and the fire extinguishing material in the fire extinguisher 8 is sent to each spraying branch pipe 7 through the spraying main pipe 9, and is passed through the spraying branch pipe 7. The blowing hole 6 of the blower is sprayed into the air supply pipe 5, and the fire extinguishing material entering the air supply pipe 5 is driven by the airflow in the air supply pipe 5, and is quickly filled in the transformer body 1, and the fire in the fire extinguisher body 1 is eliminated. budding state;

The on-load capacity regulation controller 15 includes a first processing unit 19, a current collector 20, a voltage collector 21 and a capacity regulation state monitoring unit 22; the current collector 20, the voltage collector 21, and the capacity regulation state monitoring unit 22 and the on-load capacity regulation switch 14 are connected to the first processing unit 19, the capacity regulation state monitoring unit 22 is connected to the on-load capacity regulation switch 14, and the current collector 20 and the voltage collector 21 are respectively used to obtain the on-load capacity regulation The current information and voltage information of the transformer, and the obtained information is sent to the first processing unit 19, the first processing unit 19 processes the obtained current information and voltage information, and the capacity adjustment state monitoring unit 22 is used to obtain the on-load capacity adjustment transformer capacity regulation information, and send the capacity regulation information of the on-load capacity regulation transformer to the first processing unit 19. At the same time, the first processing unit 19 can control the operation of the on-load capacity regulation switch 14 according to the obtained instruction, and then control the On-load capacity-adjusting transformer for capacity adjustment operation;

The inside of the transformer body 1 is also provided with a temperature sensor 11 and a smoke sensor 18, the temperature sensor 11 and the smoke sensor 18 are connected to the first processing unit 19 through communication, and the first processing unit 19 is connected to the air blower 4, the exhaust fan 12 and the fire extinguishing electromagnetic The valve 10 and the temperature sensor 11 are used to monitor the temperature condition in the transformer body 1, and send the obtained temperature data to the first processing unit 19. When the temperature in the transformer body 1 is higher than the set range, the first processing unit 19 Control the start of the air blower 4 and the exhaust fan 12 to cool down the inside of the transformer body 1. During this process, the first processing unit 19 can control the operating power of the air blower 4 and the exhaust fan 12 according to the temperature data to achieve a corresponding heat dissipation effect. When the temperature in the transformer body 1 reaches the set range, the first processing unit 19 controls the blower 4 and the exhaust fan 12 to stop, and when the temperature in the transformer body 1 rises rapidly in a short period of time, the first processing unit 19 can judge the transformer There is a fault in the main body 1, and corresponding operations are made. The smoke sensor 18 is used to monitor the smoke condition in the transformer main body 1, and the monitoring data is sent to the first processing unit 19, so as to detect the fire in time. When the first processing unit 19 judges When there is a fire in the fire extinguisher body 1, the fire extinguishing solenoid valve 10 will be controlled to open, and the fire extinguishing material in the fire extinguisher 8 will quickly fill the transformer body 1, and the fire in the fire extinguisher body 1 will be eliminated in the bud; An alarm 17 is provided, and the first processing unit 19 is connected to the alarm 17. When the first processing unit 19 judges that there is a fault or a fire occurs in the transformer body 1, the alarm 17 is used to alarm, so that nearby staff can timely Finding and processing, in this embodiment, preferably, the alarm 17 is an audible and visual alarm;

The on-load capacity regulation controller 15 also includes a first control panel 23 and a first display unit 24, the first control panel 23 and the first display unit 24 are connected to the first processing unit 19, the first control panel 23 is used for the user to input control commands, the first control panel 23 sends the control commands input by the user to the first processing unit 19, and the first processing unit 19 performs corresponding operations according to the control commands, for example, the first control panel 23 can set The rated peak value of the automatic switching of the capacity, the delay time of the automatic switching, the manual/automatic capacity adjustment switch, the first display unit 24 is used to display the status information of the on-load capacity adjustment transformer, in this embodiment, preferably, the first display Unit 24 is a liquid crystal display;

The on-load capacity regulation controller 15 also includes a first storage module 25, the first storage module 25 is connected to the first processing unit 19, and the first storage module 25 is used to store the working information of the first processing unit 19 and the acquired Data information for later viewing and uploading;

The on-load capacity-regulating controller 15 also includes a first ZigBee communication module 26, and the on-load capacity-regulating transformer with good heat dissipation and easy manipulation also includes a hand-held terminal 27, and the first processing unit 19 passes through the first ZigBee The communication module 26 is communicatively connected to the handheld terminal 27, and the first processing unit 19 wirelessly sends the operating status information of the on-load capacity regulating transformer to the handheld terminal 27 through the first ZigBee communication module 26, and the handheld terminal 27 can also download the on-load regulating transformer by itself. The operation information of the capacitor transformer, and at the same time, the hand-held terminal 27 can also issue control instructions to the first processing unit 19 to wirelessly control the operation of the on-load capacity-regulating transformer, which realizes the convenient control of the on-load capacity-regulating transformer. When the processing unit 19 judges that there is a fault or a fire in the transformer body 1, the fault or fire information is sent to the handheld terminal 27, so that the staff who supervise the handheld terminal 27 can know the fault or fire information in time, and deal with it in time, so that Avoid causing greater losses;

Described handheld terminal 27 comprises the second processing unit 28 and the second ZigBee communication module 34 that cooperates with the first ZigBee communication module 26, and the second ZigBee communication module 34 is connected with the second processing unit 28, through the first ZigBee communication module 26 and the second ZigBee communication module 34, have realized the wireless communication between the handheld terminal 27 and the on-load capacity regulation controller 15; The handheld terminal 27 also includes a second control panel 30 and a second display unit 31 , the second control panel 30 and the second display unit 31 are both connected to the second processing unit 28, and the staff sends control instructions to the handheld terminal 27 through the second control panel 30, and then controls the operation of the on-load capacity regulating transformer through the handheld terminal 27 , the second display unit 31 is used to display the running status information of the on-load capacity regulating transformer, including fault and fire information;

The handheld terminal 27 also includes a second storage module 29, the second storage module 29 is connected with the second processing unit 28, and the second storage module 29 is used to store the data information obtained by the second processing unit 28; the handheld terminal 27 also includes a USB interface module 32, and the USB interface module 32 is used to connect peripheral equipment, such as a mobile hard disk or a computer, etc., and the peripheral equipment can obtain the data information stored in the second storage module 29 of the handheld terminal 27 through the USB interface module 32 The handheld terminal 27 also includes a power module 33 connected to the second processing unit 28 for supplying power to the second processing unit 28 and the functional units connected to the second processing unit 28 .

The working principle of the present invention is: the temperature sensor 11 is used to monitor the temperature condition in the transformer body 1 of the on-load capacity regulating transformer with good heat dissipation and easy to control, and sends the obtained temperature data to the first processing unit 19 , when the temperature in the transformer body 1 is higher than the set range, the first processing unit 19 controls the blower 4 and the exhaust fan 12 to start, the blower 4 sends the outside air into the air supply pipe 5, and the air is sent through the air supply pipe 5 into the transformer body 1, the exhaust fan 12 extracts the air in the transformer body 1, and the air takes away the heat of the transformer body 1 during the process of flowing through the transformer body 1, so as to achieve the purpose of cooling down the inside of the transformer body 1. Among them, the first processing unit 19 can control the operating power of the air blower 4 and the exhaust fan 12 according to the temperature data to achieve the corresponding heat dissipation effect. When the temperature in the transformer body 1 reaches the set range, the first processing unit 19 controls the air blower 4 And exhaust fan 12 stops. The smoke sensor 18 is used to monitor the smoke condition in the transformer body 1, and sends the monitoring data to the first processing unit 19, so as to detect the fire situation in time. When the first processing unit 19 judges that there is a fire situation in the fire extinguisher body 1, it will control the fire extinguishing The electromagnetic valve 10 is opened, and the fire extinguishing material in the fire extinguisher 8 is sent into each spray branch pipe 7 through the blowing main pipe 9, and is sprayed into the air supply pipe 5 through the spray hole 6 on the spray branch pipe 7, and enters the air supply pipe 5 The fire extinguishing material is driven by the airflow in the air supply pipe 5, and is quickly filled in the transformer body 1, so that the fire in the fire extinguisher body 1 is eliminated in the bud. When the first processing unit 19 judges that there is a fault or a fire in the transformer body 1, it will send an alarm through the alarm 17, so that the nearby staff can find out and deal with it in time. The current collector 20 and the voltage collector 21 are used to obtain the current information and the voltage information of the on-load capacity regulating transformer respectively, and the information obtained is sent to the first processing unit 19, and the first processing unit 19 is used for obtaining the current information and the voltage information The information is processed, and the capacity adjustment status monitoring unit 22 is used to obtain the capacity adjustment information of the on-load capacity adjustment transformer, and sends the capacity adjustment information of the on-load capacity adjustment transformer to the first processing unit 19. At the same time, the first processing unit 19 can be based on The obtained instructions are used to control the operation of the on-load capacity-regulating switch 14, and then control the on-load capacity-regulating transformer to perform the capacity-regulating operation. The cooperation between the first ZigBee communication module 26 and the second ZigBee communication module 34 realizes the wireless communication between the handheld terminal 27 and the on-load capacity regulation controller 15 . The first processing unit 19 wirelessly sends the operating status information of the on-load capacity regulating transformer to the handheld terminal 27 through the first ZigBee communication module 26, and the operating information of the on-load capacity regulating transformer can also be downloaded by the handheld terminal 27, and can also be passed simultaneously. The hand-held terminal 27 sends a control command to the first processing unit 19 to wirelessly control the operation of the on-load capacity-regulating transformer, which realizes convenient control of the on-load capacity-regulating transformer. When the first processing unit 19 judges that a fault occurs in the transformer body Or when there is a fire, the fault or fire information is sent to the handheld terminal 27, so that the staff who supervise the handheld terminal 27 can know the fault or fire information in time, and deal with it in time to avoid causing greater losses.

The on-load capacity-regulating transformer with good heat dissipation and easy handling, through the cooperation of the blower 4 and the exhaust fan 12, realizes the rapid flow of air in the transformer, and the fast-flowing air will take away the heat of the transformer, thereby achieving The purpose of rapid heat dissipation and cooling, the heat dissipation effect is good, to ensure that the internal electrical components of the on-load capacity regulating transformer are in a normal working environment, and to prolong the service life of the on-load capacity regulating transformer; the on-load capacity regulating transformer with good heat dissipation and easy to control The transformer can detect the operating state of the on-load capacity-regulating transformer through a handheld terminal, and realize various control operations, which is convenient to use; the on-load capacity-regulating transformer with good heat dissipation and easy manipulation is equipped with a fire extinguisher inside, which can Most of the fires are eliminated in the bud, with high safety, and the on-load capacity regulating transformer can alarm the fire or fault information in time, so that the staff can know and deal with it in time to avoid greater losses.

The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the above-mentioned embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various modifications can be made without departing from the gist of the present invention. kind of change.

Claims (10)

1. An on-load capacity-regulating transformer with good heat dissipation and easy to control, characterized in that it includes a transformer body (1) and an on-load capacity-regulating switch (14); the upper end of the transformer body (1) is provided with a plurality of The outlet column (16), the on-load capacity regulation switch (14) are installed on the transformer body (1), the on-load capacity regulation switch (14) is installed on the on-load capacity regulation controller (15), the on-load capacity regulation controller (15) Connect the on-load capacity adjustment switch (14); the bottom of the transformer body (1) is also provided with a base (2), and the base (2) is provided with an air supply pipe (5), and one end of the air supply pipe (5) It communicates with the inner cavity of the transformer body (1), and the other end communicates with the outside world. A blower fan (4) is installed in the port on the air supply pipe (5) that communicates with the outside world. The upper part of the side wall of the transformer body (1) is also equipped with a The exhaust fan (12) connected to the inner cavity of the transformer body (1), the air supply pipe (5) has a plurality of them, and is arranged in the base (2) at even intervals; the on-load capacity adjustment controller (15 ) includes a first processing unit (19), a current collector (20), a voltage collector (21) and a capacity regulation state monitoring unit (22); the current collector (20), voltage collector (21), regulator Both the capacity state monitoring unit (22) and the on-load capacity regulating switch (14) are connected to the first processing unit (19), and the capacity regulating state monitoring unit (22) is connected to the on-load capacity regulating switch (14); The load capacity regulating controller (15) also includes a first control panel (23) and a first display unit (24), and the first control panel (23) and the first display unit (24) are connected to the first processing A unit (19); the on-load capacity regulation controller (15), further comprising a first storage module (25), and the first storage module (25) is connected to the first processing unit (19). 2. The on-load capacity regulating transformer with good heat dissipation and easy handling according to claim 1, characterized in that, a lightning protection device is arranged on the outlet column (16). 3. The on-load capacity regulating transformer with good heat dissipation and easy handling according to claim 2, characterized in that a protective cover (13) is installed on the transformer body (1), and the on-load capacity regulating controller (15) and the on-load capacity regulating switch (14) are all located in the protective cover (13). 4. The on-load capacity regulating transformer with good heat dissipation and easy handling according to claim 3, characterized in that, a filter screen (3) is also set at the port of the air supply pipe (5) that communicates with the outside world , the filter screen (3) is located outside the blower fan (4), and the blower fan (4) is connected to the outside world through the filter screen (3). 5. The on-load capacity regulating transformer with good heat dissipation and easy handling according to claim 1 or 2 or 3 or 4, characterized in that a fire extinguisher (8) is also arranged in the base (2), and the fire extinguisher ( 8) is provided with a blowing main pipe (9), and the upper part of the blowing main pipe (9) is provided with a blowing branch pipe (7) connected to it, and the front end of the blowing branch pipe (7) extends into the air supply pipe (5), And the blowing branch pipe (7) is located on the pipe section in the air supply pipe (5) and has a blowing hole (6), the number of the spray branch pipe (7) is the same as the number of the air supply pipe (5), and both Correspondingly, the fire extinguishing electromagnetic valve (10) is installed on the injection main pipe (9). 6. The on-load capacity regulating transformer with good heat dissipation and easy handling according to claim 5, characterized in that a temperature sensor (11) and a smoke sensor (18) are also arranged inside the transformer body (1), Both the temperature sensor (11) and the smoke sensor (18) are communicatively connected to the first processing unit (19), and the first processing unit (19) controls and connects the air blower (4), exhaust fan (12) and fire extinguishing solenoid valve (10). 7. The on-load capacity regulating transformer with good heat dissipation and easy handling according to claim 6, characterized in that, the upper end of the fire extinguisher body (1) is also provided with an alarm (17), and the first processing unit (19 ) to the alarm (17). 8. The on-load capacity-regulating transformer with good heat dissipation and easy handling according to claim 7, characterized in that, the on-load capacity-regulating controller (15) also includes a first ZigBee communication module (26), The on-load capacity regulating transformer with good heat dissipation and easy manipulation also includes a hand-held terminal (27), and the first processing unit (19) is connected to the hand-held terminal (27) through the first ZigBee communication module (26); The handheld terminal (27) includes a second processing unit (28) and a second ZigBee communication module (34) matched with the first ZigBee communication module (26), the second ZigBee communication module (34) and the second processing unit ( 28) are connected; the handheld terminal (27) also includes a second control panel (30) and a second display unit (31), and both the second control panel (30) and the second display unit (31) are connected to the second processing unit (28). 9. The on-load capacity regulating transformer with good heat dissipation and easy handling according to claim 8, characterized in that, the handheld terminal (27) further includes a second storage module (29), the second storage module (29 ) is connected to the second processing unit (28); the handheld terminal (27) also includes a USB interface module (32). 10. The on-load capacity regulating transformer with good heat dissipation and easy handling according to claim 9, characterized in that, the handheld terminal (27) further includes a power module (33), and the power module (33) is connected to the first Two processing units (28).