CN217307251U

CN217307251U - Generator differential protection device

Info

Publication number: CN217307251U
Application number: CN202221028867.4U
Authority: CN
Inventors: 雷凯斌; 申家光; 李世哲; 徐尚飞; 梁静
Original assignee: Zhengzhou Beirui Power Technology Co ltd
Current assignee: Zhengzhou Beirui Power Technology Co ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-08-26
Anticipated expiration: 2032-04-29

Abstract

The utility model relates to a generator differential protection device, which comprises an outer shell, the both sides and the bottom of shell all are provided with the inner chamber, the inboard top of inner chamber and bottom are provided with first venthole and second gas hole respectively, the bottom in the inner chamber outside is provided with the air-supply line, the motor is installed at the top of air-supply line, and this generator differential protection device can drive the flabellum rotatory through the starter motor to wind-force that the flabellum produced can blow the top and the bottom of main control board through first venthole and second gas hole, thereby has promoted the efficiency and the quality of cooling, and when the motor starts, can drive the brush rotation, thereby can sweep dust and the flocculus that adsorb on the dust filter screen, avoided artificial clearance.

Description

Generator differential protection device

Technical Field

The utility model relates to a generator technical field specifically is a generator differential protection device.

Background

The differential protection works by utilizing kirchhoff current theorem, when the generator works normally or has an external fault, the generator is regarded as an ideal generator, the current flowing into the transformer is equal to the current flowing out of the transformer, the differential relay does not act and serves as a protection device, and the differential relay provides feedback information by two current transformers positioned at two different positions in the system.

Like the utility model CN213461121U, the differential protection device of generator that the grant bulletin date is 20210615, although can accomplish dehumidification and radiating function, however, when dispelling the heat to the device, outside dust and floccule can enter into the inside of device through the fresh air inlet, lead to the inside dust of device too much easily, need often clear up, lead to very trouble, the more damage that leads to the inside main control board of device easily of dust simultaneously, when dispelling the heat to the main control board simultaneously, can't dispel the heat simultaneously to the top and the bottom of main control board simultaneously, lead to radiating inefficiency. In order to solve the above problems, an innovative design is performed on the basis of the original differential protection device.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a generator differential protection device to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a generator differential protection device comprises a shell, wherein inner cavities are arranged on two sides and the bottom of the shell, a first air outlet and a second air blowing hole are respectively arranged at the top and the bottom of the inner cavity inner side, an air inlet pipe is arranged at the bottom of the inner cavity outer side, a motor is installed at the top of the air inlet pipe, a first rotating shaft is arranged at the bottom of the motor, a first conical gear is connected to the lower end of the first rotating shaft through the top of the air inlet pipe, a second conical gear and a third conical gear are respectively meshed with the two sides of the first conical gear, a second rotating shaft is fixed at the middle part of one side of the second conical gear, a first fixing plate is rotatably arranged at the outer side of the second rotating shaft, the top of the first fixing plate is fixedly connected with the top of the air inlet pipe, fan blades are fixed at the end part of the second rotating shaft, and a third rotating shaft is fixed at one side of the third conical gear, the outer wall of third pivot rotates installs the second fixed plate, the top of second fixed plate and the top fixed connection of air-supply line, the outside nestification of third pivot has the dust filter screen, the dust filter screen passes through bolted connection with the shell, one side laminating of dust filter screen has the spring, the spring nestification is in the outside of third pivot, the tip of spring and one side fixed connection of second fixed plate, first nut, fly leaf and second nut are installed from the right side to a left side in proper order in the outside of third pivot, the avris of fly leaf is fixed with the brush, the tip of brush and one side laminating of dust filter screen, the tip of air-supply line is provided with the baffle.

Preferably, the electrical heating rod is installed to the tip of air-supply line, humidity transducer and temperature sensor are installed respectively to the inboard of shell bottom, the main control board is installed to the inside bolted mounting of shell, one side and the bottom of shell all are provided with the gas vent, the apron is installed to the top bolt of shell.

Preferably, the bottom of the first air outlet hole is designed to be inclined downwards, the top of the second air blowing hole is designed to be inclined upwards, and the inner cavity is designed to be U-shaped.

Preferably, the third rotating shaft, the first nut and the second nut are in threaded connection, and the third rotating shaft is in sliding connection with the movable plate.

Preferably, the baffle is designed into a circular arc structure, and the front section of the baffle is of a triangular structure.

Compared with the prior art, the beneficial effects of the utility model are that: the differential protection device of the generator is provided with a protection device,

1. the fan blade can be driven to rotate by starting the motor, so that wind power generated by the fan blade can be blown to the top and the bottom of the main control board through the first air outlet and the second air blowing hole, the cooling efficiency and quality are improved, and the brush can be driven to rotate when the motor is started, so that dust and floccules adsorbed on the dust filter screen can be swept away, and manual cleaning is avoided;

2. the second nut is rotated, the second nut is taken down, then the movable plate is taken down, the first nut is rotated and then the bolt on the dust filter screen is detached, and at the moment, the dust filter screen is pushed out under the elastic action of the spring, so that the dust filter screen is detached, and the dust filter screen is conveniently replaced.

Drawings

FIG. 1 is a schematic view of the front cross-sectional structure of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A of FIG. 1 according to the present invention;

FIG. 3 is a schematic view of a side view of the electric heating rod of the present invention;

fig. 4 is the utility model discloses the dust filter screen looks sideways at mounting structure schematic diagram.

In the figure: 1. a housing; 2. an inner cavity; 3. a first air outlet hole; 4. a second air blowing hole; 5. an air inlet pipe; 6. a motor; 7. a first rotating shaft; 8. a first bevel gear; 9. a second bevel gear; 10. a second rotating shaft; 11. a first fixing plate; 12. a fan blade; 13. a third bevel gear; 14. a third rotating shaft; 15. a dust filter screen; 16. a spring; 17. a first nut; 18. a movable plate; 19. a second nut; 20. a brush; 21. a baffle plate; 22. a second fixing plate; 23. an electrical heating rod; 24. a humidity sensor; 25. a temperature sensor; 26. a main control board; 27. an exhaust port; 28. and (7) a cover plate.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the objects of the present invention, the following detailed description is given to the embodiments, structures, features and effects according to the present invention with reference to the accompanying drawings and preferred embodiments.

Referring to fig. 1-4, the present invention provides a technical solution: a generator differential protection device comprises a shell 1, wherein two sides and the bottom of the shell 1 are respectively provided with an inner cavity 2, the top and the bottom of the inner side of the inner cavity 2 are respectively provided with a first air outlet 3 and a second air blowing hole 4, the bottom of the outer side of the inner cavity 2 is provided with an air inlet pipe 5, the top of the air inlet pipe 5 is provided with a motor 6, the bottom of the motor 6 is provided with a first rotating shaft 7, the lower end of the first rotating shaft 7 penetrates through the top of the air inlet pipe 5 and is connected with a first bevel gear 8, two sides of the first bevel gear 8 are respectively meshed with a second bevel gear 9 and a third bevel gear 13, the middle part of one side of the second bevel gear 9 is fixed with a second rotating shaft 10, the outer side of the second rotating shaft 10 is rotatably provided with a first fixing plate 11, the top of the first fixing plate 11 is fixedly connected with the top of the air inlet pipe 5, the end part of the second rotating shaft 10 is fixed with a fan blade 12, one side of the third bevel gear 13 is fixed with a third rotating shaft 14, the outer wall of third pivot 14 rotates and installs second fixed plate 22, the top of second fixed plate 22 and the top fixed connection of air-supply line 5, the outside nestification of third pivot 14 has dust filter screen 15, dust filter screen 15 passes through bolted connection with shell 1, the laminating of one side of dust filter screen 15 has spring 16, spring 16 nests in the outside of third pivot 14, the tip of spring 16 and one side fixed connection of second fixed plate 22, first nut 17 is installed from the right side to left side in proper order in the outside of third pivot 14, fly leaf 18 and second nut 19, the avris of fly leaf 18 is fixed with brush 20, the tip of brush 20 and the laminating of one side of dust filter screen 15, the tip of air-supply line 5 is provided with baffle 21.

An electric heating rod 23 is installed at the end part of the air inlet pipe 5, a humidity sensor 24 and a temperature sensor 25 are respectively installed on the inner side of the bottom of the shell 1, a main control board 26 is installed on an inner bolt of the shell 1, exhaust ports 27 are respectively arranged on one side and the bottom of the shell 1, a cover plate 28 is installed on a top bolt of the shell 1, when the humidity sensor 24 senses that the inner humidity of the shell 1 is higher, the humidity sensor 24 transmits a signal to the main control board 26, then the main control board 26 controls the motor 6 and the electric heating rod 23 to start, so that the fan blade 12 rotates, the wind power generated by the fan blade 12 blows the heat generated by the electric heating rod 23 to the inner part of the shell 1, so as to dehumidify the inner part of the shell 1, when the temperature sensor 25 senses that the inner temperature of the shell 1 is higher, the main control board 26 controls the electric heating rod 23 to stop starting, and controls the motor 6 to continue to work, thereby performing a cooling process on the inside of the casing 1.

The bottom of first venthole 3 is the slope design downwards, and the top of second gas hole 4 is the slope design upwards, and inner chamber 2 is "U" type design, has guaranteed the air current that blows off from first venthole 3 department, can have the top to main control board 26 to dispel the heat, and can dispel the heat to the bottom of main control board 26 from the air current that second gas hole 4 department blew off.

The third rotating shaft 14 is in threaded connection with the first nut 17 and the second nut 19, and the third rotating shaft 14 is in sliding connection with the movable plate 18, so that the movable plate 18 is convenient to detach and mount.

The baffle 21 is designed to be in an arc-shaped structure, the front section of the baffle 21 is in a triangular structure, the rotary movable plate 18 is protected, and the movable plate 18 is prevented from injuring workers.

The working principle is as follows: when the humidity sensor 24 senses that the internal humidity of the housing 1 is high, the humidity sensor 24 transmits a signal to the main control board 26, then the main control board 26 controls the motor 6 and the electric heating rod 23 to start, at this time, the motor 6 drives the fan blade 12 to rotate through the first rotating shaft 7, the first bevel gear 8, the second bevel gear 9 and the second rotating shaft 10, so that the heat generated by the electric heating rod 23 is blown to the inside of the housing 1 through the inner cavity 2, the first air outlet hole 3 and the second air outlet hole 4 by the wind power generated by the fan blade 12, thereby simultaneously dissipating the heat at the top and the bottom of the main control board 26, discharging the heat through the air outlet 27, and the detachable filter screen is installed on the air outlet 27, thereby dehumidifying the inside of the housing 1, and the dust filter screen 15 plays a role of blocking external dust and floccules, when the temperature sensor 25 senses that the internal temperature of the housing 1 is high, at this time, the main control board 26 controls the electric heating rod 23 to stop starting, and controls the motor 6 to continue working, so as to cool the inside of the housing 1, and at the same time, when the motor 6 is started, the motor can drive the movable plate 18 and the brush 20 to rotate through the first rotating shaft 7, the first bevel gear 8, the third bevel gear 13, the third rotating shaft 14, the first nut 17 and the second nut 19, so as to sweep away the dust and floccule adsorbed on the dust filter screen 15, when the dust filter screen 15 needs to be detached for cleaning or replacement, the second nut 19 is rotated at this time, the second nut 19 is taken down, then the movable plate 18 is taken down, then the first nut 17 is rotated down, then the bolt on the dust filter screen 15 is detached, at this time, under the elastic force of the spring 16, the dust filter screen 15 is pushed out, so as to complete the detachment of the dust filter screen 15.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed by the preferred embodiment, it is not limited to the present invention, and any person skilled in the art can make modifications or changes equivalent to the equivalent embodiments by utilizing the above disclosed technical contents without departing from the technical scope of the present invention, but all the modifications, changes and changes of the technical spirit of the present invention made to the above embodiments are also within the scope of the technical solution of the present invention.

Claims

1. A generator differential protection device comprising a casing (1), characterized in that: the inner cavities (2) are arranged on two sides and the bottom of the shell (1), the top and the bottom of the inner cavity (2) are respectively provided with a first air outlet (3) and a second air blowing hole (4), the bottom of the inner cavity (2) is provided with an air inlet pipe (5), the top of the air inlet pipe (5) is provided with a motor (6), the bottom of the motor (6) is provided with a first rotating shaft (7), the lower end of the first rotating shaft (7) penetrates through the top of the air inlet pipe (5) to be connected with a first bevel gear (8), two sides of the first bevel gear (8) are respectively meshed with a second bevel gear (9) and a third bevel gear (13), the middle part of one side of the second bevel gear (9) is fixed with a second rotating shaft (10), the outer side of the second rotating shaft (10) is rotatably provided with a first fixing plate (11), the top of the first fixing plate (11) is fixedly connected with the top of the air inlet pipe (5), the end fixing of second pivot (10) has flabellum (12), one side of third bevel gear (13) is fixed with third pivot (14), the outer wall of third pivot (14) rotates and installs second fixed plate (22), the top of second fixed plate (22) and the top fixed connection of air-supply line (5), the outside nestification of third pivot (14) has dust filter screen (15), dust filter screen (15) and shell (1) pass through bolted connection, the laminating of one side of dust filter screen (15) has spring (16), spring (16) nestification is in the outside of third pivot (14), the tip of spring (16) and one side fixed connection of second fixed plate (22), first nut (17), fly leaf (18) and second nut (19) are installed from right side to left side in proper order in the outside of third pivot (14), the avris of fly leaf (18) is fixed with brush (20), the tip of brush (20) and the laminating of one side of dust filter screen (15), the tip of air-supply line (5) is provided with baffle (21).

2. A generator differential protection device according to claim 1, characterized in that: electric heating rod (23) are installed to the tip of air-supply line (5), humidity transducer (24) and temperature sensor (25) are installed respectively to the inboard of shell (1) bottom, main control board (26) are installed to the inside bolt of shell (1), one side and the bottom of shell (1) all are provided with gas vent (27), apron (28) are installed to the top bolt of shell (1).

3. A generator differential protection device according to claim 1, characterized in that: the bottom of the first air outlet hole (3) is designed to be inclined downwards, the top of the second air blowing hole (4) is designed to be inclined upwards, and the inner cavity (2) is designed to be U-shaped.

4. A generator differential protection device according to claim 1, characterized in that: the third rotating shaft (14) is in threaded connection with the first nut (17) and the second nut (19), and the third rotating shaft (14) is in sliding connection with the movable plate (18).

5. A generator differential protection device according to claim 1, characterized in that: the baffle (21) is designed into a circular arc structure, and the front section of the baffle (21) is of a triangular structure.