Variable pitch auxiliary cabinet

Abstract

The utility model discloses a variable pitch auxiliary cabinet, which relates to the wind power variable pitch technical field, and comprises a cabinet body and a power device arranged in the cabinet body, a ventilation heat dissipation cavity is arranged in the cabinet body, a heat conduction mounting plate is fixedly embedded on the inner wall of the cabinet body, one side wall of the heat conduction mounting plate extends into the ventilation heat dissipation cavity, and the other side wall of the heat conduction mounting plate extends into the ventilation heat dissipation cavity. The power device is installed on the heat conduction installation plate, a ventilation fan is installed on the upper portion of the inner side of the ventilation heat dissipation cavity, a first dustproof net located in the ventilation heat dissipation cavity is fixedly embedded in the top of the cabinet body, an installation cavity communicated with the ventilation heat dissipation cavity is formed in the cabinet body, and a sealing mechanism is arranged in the installation cavity. A containing cavity is formed in the inner wall of the mounting cavity, and a back flushing cleaning mechanism is arranged in the containing cavity. According to the utility model, automatic cleaning of the first dustproof net can be realized, so that good ventilation performance in the ventilation and heat dissipation cavity is ensured, and good ventilation performance is maintained.

Description

Technical Field

[0001] This utility model relates to the field of wind power pitch technology, and in particular to a pitch auxiliary cabinet. Background Technology

[0002] The pitch auxiliary cabinet is an important component of variable pitch wind turbine generator sets. The electrical control devices in the pitch auxiliary cabinet generate heat during operation, and this heat needs to be dissipated. The normal and stable operation of the pitch auxiliary cabinet is an important guarantee for the continuous power output of the wind turbine generator set. Therefore, effective heat dissipation of the pitch auxiliary cabinet is required.

[0003] Patent CN205883818U, entitled "Pitch Control Cabinet," discloses a pitch control cabinet comprising: a cabinet body; a heat sink disposed within the cabinet body; power devices fixedly attached to the outer surface of the heat sink; a first air vent connected to one end of the heat sink and leading to the outside of the cabinet body, the first air vent housing a fan; and a second air vent connected to the other end of the heat sink and leading to the outside of the cabinet body. In this patent, air is drawn in through the first air vent, resulting in a significant amount of dust adhering to its surface, thus affecting ventilation performance and further impacting heat dissipation. Therefore, this paper designs a pitch control auxiliary cabinet with a self-cleaning dust removal function, thereby ensuring good ventilation performance. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a pitch auxiliary cabinet.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A pitch control auxiliary cabinet includes a cabinet body and power devices disposed inside the cabinet body. The cabinet body has a ventilation and heat dissipation cavity inside. A thermally conductive mounting plate is fixedly embedded in the inner wall of the cabinet body, and one side wall of the thermally conductive mounting plate extends into the interior of the ventilation and heat dissipation cavity. The power devices are mounted on the thermally conductive mounting plate. A ventilation fan is installed on the upper inner side of the ventilation and heat dissipation cavity. A first dustproof net located inside the ventilation and heat dissipation cavity is fixedly embedded in the top of the cabinet body. The cabinet body has an installation cavity communicating with the ventilation and heat dissipation cavity. The installation cavity has a sealing mechanism inside. The inner wall of the installation cavity has a receiving cavity. The receiving cavity has a back-blowing cleaning mechanism inside. The sealing mechanism has a squeezing mechanism that cooperates with the back-blowing cleaning mechanism.

[0007] As a further improvement of this utility model, the sealing mechanism includes a first electric telescopic rod installed on the inner wall of the mounting cavity. A sealing plate is fixed to the telescopic end of the first electric telescopic rod. The end of the sealing plate away from the first electric telescopic rod passes through the inner wall of the mounting cavity and extends into the interior of the ventilation and heat dissipation cavity.

[0008] As a further improvement of this utility model, the backflushing cleaning mechanism includes a corrugated telescopic airbag disposed inside the accommodating cavity. One end of the corrugated telescopic airbag near the ventilation and heat dissipation cavity is fixed to the inner wall of the accommodating cavity. A vent pipe is connected to the side wall of the corrugated telescopic airbag. The end of the vent pipe away from the corrugated telescopic airbag passes through the inner wall of the accommodating cavity and extends into the interior of the ventilation and heat dissipation cavity. A spring is provided inside the corrugated telescopic airbag, and the two ends of the spring are respectively fixedly connected to the inner walls of the two ends of the corrugated telescopic airbag.

[0009] As a further improvement of this utility model, the extrusion mechanism includes a second electric telescopic rod fixedly installed on the side wall of the closed plate, and a pressure plate is fixed to the telescopic end of the second electric telescopic rod.

[0010] As a further improvement of this utility model, a second dustproof net is fixedly embedded in the lower part of the inner walls on both sides of the ventilation and heat dissipation cavity.

[0011] As a further improvement of this utility model, the front of the cabinet is hinged with a cabinet door.

[0012] The beneficial effects of this utility model are:

[0013] By incorporating a sealing mechanism, a backflushing cleaning mechanism, and a squeezing mechanism, when the first dustproof net needs cleaning, the first electric telescopic rod is first activated to extend, moving the sealing plate into the ventilation and heat dissipation chamber. Then, the second electric telescopic rod is activated to extend, moving the pressure plate into the accommodating chamber. The pressure plate squeezes the corrugated telescopic airbag, and the gas inside the corrugated telescopic airbag is squeezed through the vent pipe into the space between the first dustproof net and the sealing plate. This allows for backflushing of the first dustproof net from the inside out, causing the dust adhering to the surface of the first dustproof net to detach from the first dustproof net, thereby achieving automatic cleaning of the first dustproof net and ensuring good ventilation performance inside the ventilation and heat dissipation chamber. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a pitch auxiliary cabinet proposed in this utility model;

[0015] Figure 2 This utility model provides a schematic diagram of the installation cavity, sealing mechanism, extrusion mechanism, accommodating cavity, ventilation and heat dissipation cavity, and ventilation fan of a pitch auxiliary cabinet.

[0016] Figure 3 This is a partial cross-sectional structural diagram of the corrugated telescopic airbag, spring, and vent pipe of a pitch auxiliary cabinet proposed in this utility model.

[0017] Figure 4 This is a schematic diagram of the structure of the enclosed plate of a pitch auxiliary cabinet proposed in this utility model.

[0018] In the diagram: 1 Cabinet body, 2 Cabinet door, 3 Hinges, 4 First dustproof net, 5 Second dustproof net, 6 Power device, 7 Heat-conducting mounting plate, 8 Mounting cavity, 9 Ventilation and heat dissipation cavity, 10 Ventilation fan, 11 First electric telescopic rod, 12 Enclosure plate, 13 Second electric telescopic rod, 14 Pressure plate, 15 Receiving cavity, 16 Corrugated telescopic airbag, 17 Ventilation pipe, 18 Spring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figures 1-4 A pitch control auxiliary cabinet includes a cabinet body 1 and a power device 6 disposed inside the cabinet body 1. A cabinet door 2 is hinged to the front of the cabinet body 1 via a hinge 3. The cabinet body 1 has a ventilation and heat dissipation cavity 9 inside. A heat-conducting mounting plate 7 is fixedly embedded in the inner wall of the cabinet body 1, and one side wall of the heat-conducting mounting plate 7 extends into the interior of the ventilation and heat dissipation cavity 9. The power device 6 is mounted on the heat-conducting mounting plate 7. A ventilation fan 10 is installed on the upper inner side of the ventilation and heat dissipation cavity 9. A first dustproof net 4 is fixedly embedded in the top of the cabinet body 1, located inside the ventilation and heat dissipation cavity 9. Second dustproof nets 5 are fixedly embedded in the lower inner walls on both sides of the ventilation and heat dissipation cavity 9. When the ventilation fan 10 is activated, dust can be drawn in through the first dustproof net 4. The heat from the power device 6 is transferred to the air inside the ventilation and heat dissipation cavity 9 through the heat-conducting mounting plate 7. The hot air inside the ventilation and heat dissipation cavity 9 is then discharged through the second dustproof net 5, thereby dissipating heat from the power device 6. The cabinet 1 has an installation cavity 8 that communicates with the ventilation and heat dissipation cavity 9. The installation cavity 8 has a sealing mechanism inside. The inner wall of the installation cavity 8 has a receiving cavity 15. The receiving cavity 15 has a back-blowing cleaning mechanism inside. The sealing mechanism has a squeezing mechanism that cooperates with the back-blowing cleaning mechanism. The squeezing mechanism includes a second electric telescopic rod 13 that is fixedly installed on the side wall of the sealing plate 12. The telescopic end of the second electric telescopic rod 13 is fixed with a pressure plate 14.

[0021] In this utility model, the sealing mechanism includes a first electric telescopic rod 11 installed on the inner wall of the mounting cavity 8. A sealing plate 12 is fixed to the telescopic end of the first electric telescopic rod 11. The end of the sealing plate 12 away from the first electric telescopic rod 11 passes through the inner wall of the mounting cavity 8 and extends into the interior of the ventilation and heat dissipation cavity 9.

[0022] The backflushing cleaning mechanism includes a corrugated telescopic airbag 16 disposed inside the accommodating cavity 15. One end of the corrugated telescopic airbag 16 near the ventilation and heat dissipation cavity 9 is fixed to the inner wall of the accommodating cavity 15. A vent pipe 17 is connected to the side wall of the corrugated telescopic airbag 16. The end of the vent pipe 17 away from the corrugated telescopic airbag 16 passes through the inner wall of the accommodating cavity 15 and extends into the interior of the ventilation and heat dissipation cavity 9. A spring 18 is disposed inside the corrugated telescopic airbag 16. The two ends of the spring 18 are fixedly connected to the inner walls of the two ends of the corrugated telescopic airbag 16, respectively. The spring 18 can be used to extend and recover the corrugated telescopic airbag 16 by utilizing the elastic force of the spring 18.

[0023] When this utility model is in use, when the ventilation fan 10 is started, air can be drawn in through the first dustproof net 4, and then the heat of the power device 6 is converted into the air inside the ventilation and heat dissipation cavity 9 through the heat-conducting mounting plate 7. Then, the hot air inside the ventilation and heat dissipation cavity 9 is discharged through the second dustproof net 5, thereby achieving heat dissipation for the power device 6. When it is necessary to clean the first dustproof net 4, the first electric telescopic rod 11 is activated to extend, driving the sealing plate 12 into the ventilation and heat dissipation cavity 9. Then, the second electric telescopic rod 13 is activated to extend, driving the pressure plate 14 into the accommodating cavity 15. The pressure plate 14 squeezes the corrugated telescopic airbag 16, and the gas inside the corrugated telescopic airbag 16 is squeezed into the space between the first dustproof net 4 and the sealing plate 12 through the vent pipe 17. This allows the first dustproof net 4 to be back-blown from the inside out, causing the dust adhering to the surface of the first dustproof net 4 to detach from the first dustproof net 4, thereby achieving automatic cleaning of the first dustproof net 4.

[0024] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A variable pitch auxiliary cabinet comprising a cabinet body (1), a power device (6) arranged inside the cabinet body (1), characterized in that, The inside of the cabinet body (1) is provided with a ventilation and heat dissipation cavity (9), a heat-conducting mounting plate (7) is fixedly embedded on the inner wall of the cabinet body (1), and one side wall of the heat-conducting mounting plate (7) extends to the inside of the ventilation and heat dissipation cavity (9), the power device (6) is mounted on the heat-conducting mounting plate (7), a ventilation fan (10) is mounted on the inner side upper portion of the ventilation and heat dissipation cavity (9), a first dust screen (4) located in the inside of the ventilation and heat dissipation cavity (9) is fixedly embedded on the top of the cabinet body (1), the inside of the cabinet body (1) is provided with a mounting cavity (8) in communication with the ventilation and heat dissipation cavity (9), the inside of the mounting cavity (8) is provided with a closing mechanism, the inner wall of the mounting cavity (8) is provided with a containing cavity (15), the inside of the containing cavity (15) is provided with a back-blowing cleaning mechanism, and the closing mechanism is provided with an extrusion mechanism matched with the back-blowing cleaning mechanism.

2. A pitch assist cabinet according to claim 1, characterized in that The closing mechanism comprises a first electric telescopic rod (11) mounted on the inner wall of the mounting cavity (8), and a closing plate (12) is fixed to the telescopic end of the first electric telescopic rod (11), wherein the end, away from the first electric telescopic rod (11), of the closing plate (12) penetrates the inner wall of the mounting cavity (8) and extends to the inside of the ventilation and heat dissipation cavity (9).

3. A variable pitch auxiliary cabinet according to claim 2, characterized in that The back-blowing cleaning mechanism comprises a corrugated telescopic air bag (16) arranged in the inside of the containing cavity (15), wherein the corrugated telescopic air bag (16) is fixed to the inner wall of the containing cavity (15) at the end close to the ventilation and heat dissipation cavity (9), a gas pipe (17) is connected to the side wall of the corrugated telescopic air bag (16), the end, away from the corrugated telescopic air bag (16), of the gas pipe (17) penetrates the inner wall of the containing cavity (15) and extends to the inside of the ventilation and heat dissipation cavity (9), and a spring (18) is arranged in the inside of the corrugated telescopic air bag (16), and the two ends of the spring (18) are fixedly connected with the inner walls of the two ends of the corrugated telescopic air bag (16) respectively.

4. A pitch assist cabinet according to claim 3, characterized in that The extrusion mechanism comprises a second electric telescopic rod (13) fixedly mounted on the side wall of the closing plate (12), and a pressing plate (14) is fixed to the telescopic end of the second electric telescopic rod (13).

5. The auxiliary pitch control cabinet according to claim 1, characterized in that Second dust screens (5) are fixedly embedded on the inner wall lower portions of both sides of the ventilation and heat dissipation cavity (9).

6. A pitch assist cabinet according to claim 1, characterized in that, The front of the cabinet body (1) is hingedly connected with a cabinet door (2) through a hinge (3).

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