CN212486372U

CN212486372U - High-power high-voltage variable-frequency power supply control cabinet for high-voltage electrostatic dust removal

Info

Publication number: CN212486372U
Application number: CN202020990524.0U
Authority: CN
Inventors: 杨涤; 李崇坚
Original assignee: BEIJING BOQIAN ENGINEERING TECHNOLOGY CO LTD
Current assignee: BEIJING BOQIAN ENGINEERING TECHNOLOGY CO LTD
Priority date: 2020-06-01
Filing date: 2020-06-01
Publication date: 2021-02-05
Anticipated expiration: 2030-06-01

Abstract

The utility model discloses a high-power high-voltage variable frequency power supply switch board for high-pressure electrostatic precipitator, the intelligent cabinet temperature adjusting device comprises a cabinet body, the fixed qianmen that is provided with in front of the cabinet body, the fixed control box fixed orifices that is provided with on the qianmen, the fixed back door that is provided with in rear end of the cabinet body, the fixed main radiator fan that is provided with of one end of the cabinet body, the fixed IGBT that is provided with of one end that is close to main radiator fan of cabinet body inner panel front side, the one end that main radiator fan was kept away from to IGBT is provided with the rectifier bridge, the one end that IGBT was kept away from to the rectifier bridge is provided with the radiator, the top of IGBT is provided with range upon range of copper bar, be provided with flat. The utility model discloses a high-power high-voltage variable frequency power supply switch board for high-pressure electrostatic precipitator, the device have reduced the time of maintenance, guarantee again that other troubles can not occur again in the maintenance process.

Description

High-power high-voltage variable-frequency power supply control cabinet for high-voltage electrostatic dust removal

Technical Field

The utility model relates to an electrostatic precipitator technical field especially relates to a high-power high-voltage variable frequency power supply switch board for high-voltage electrostatic precipitator.

Background

The production of nearly 9 hundred million tons of steel and iron in China is mainly converter steelmaking, which accounts for nearly 80 percent of the total amount of the whole country. Wherein, the capacity of the 100-300 ton converter accounts for about 50 percent of the national steel yield. Therefore, the dust removal problem in large converter steelmaking is the most important component for reducing air pollution in the steel industry.

At present, electrostatic dust collectors are mainly used for dedusting large-scale converter steelmaking. The working principle of the electrostatic dust collector is that a high-voltage electric field is utilized to ionize smoke, and dust charges in airflow are separated from the airflow under the action of the electric field. The operation of the electrostatic precipitator is greatly influenced by the power control cabinet.

At present, the integration level of a high-voltage electrostatic dust removal high-voltage variable-frequency power supply control cabinet is low, and after a certain element goes wrong, the high-voltage variable-frequency power supply control cabinet needs to be disassembled one by one, and the number of connection points is large, so that the difficulty of field maintenance is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a high-power high-voltage variable frequency power supply control cabinet for high-voltage electrostatic dust removal.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a high-power high-voltage variable frequency power supply control cabinet for high-voltage electrostatic dust removal comprises a cabinet body, wherein a front door is fixedly arranged at the front end of the cabinet body, a control box fixing hole is fixedly arranged on the front door, a rear door is fixedly arranged at the rear end of the cabinet body, a main radiating fan is fixedly arranged at one end of the cabinet body inner plate close to the main radiating fan, an IGBT is fixedly arranged at one end of the IGBT far away from the main radiating fan, a rectifier bridge is arranged at one end of the IGBT far away from the main radiating fan, a radiator is arranged at one end of the rectifier bridge far away from the IGBT, a laminated copper bar is arranged above the IGBT, a flat wave capacitor is arranged on the laminated copper bar, an auxiliary radiating fan is fixedly arranged at one end of the laminated copper bar far away from the main radiating fan, a circuit breaker is arranged at one end of the radiator far away from the rectifier bridge, an auxiliary electric part is, one side that main radiator fan was kept away from to current transformer is provided with pre-charge controller, the fixed reactor that is provided with of one end that current transformer was kept away from to pre-charge controller, one side that pre-charge controller was kept away from to the reactor is provided with inlet wire input a, the below of inlet wire input a is provided with inlet wire input b, the below of inlet wire input b is provided with inlet wire input c, and the below of inlet wire input c is provided with the output d of being qualified for the next round of competitions, the below of the output d of being qualified for the next round of competitions is provided.

As a further description of the above technical solution:

the main heat radiating fan includes: fan mount, fan, water conservancy diversion circle and wind channel.

As a further description of the above technical solution:

and ventilation openings are fixedly arranged on the front door and the rear door.

As a further description of the above technical solution:

the rectifier bridge includes: the six-pulse half-controlled rectifier unit comprises a radiating fin and a six-pulse half-controlled rectifier unit arranged on the radiating fin.

As a further description of the above technical solution:

the reactor is arranged on a reactor fixing frame at the lower part of the inner side of the cabinet body.

As a further description of the above technical solution:

the incoming line input end a, the incoming line input end b, the incoming line input end c, the outgoing line output end d and the outgoing line output end f are all arranged below the reactor.

The utility model discloses following beneficial effect has:

it can be seen that the utility model discloses a high-voltage variable frequency power supply switch board for high-pressure electrostatic precipitator, contravariant unit, electric capacity module, rectifier module and postnotum constitute contravariant power ware, postnotum detachable sets up the cabinet is internal. Overall structure is more concentrated, connects simply reliably, reduces the fault rate that produces because of structural problem, if need dismantle the maintenance, can dismantle as whole, also can part dismantle, is convenient for maintain and change contravariant power unit part. The maintenance time is reduced, and other faults can not occur in the maintenance process.

Drawings

Fig. 1 is a schematic front view of a high-voltage variable frequency power supply control cabinet for high-voltage electrostatic dust collection disclosed by the present invention;

fig. 2 is a schematic diagram of the front internal structure of a high-voltage variable-frequency power supply control cabinet for high-voltage electrostatic dust collection disclosed by the utility model;

fig. 3 is the utility model discloses a high-voltage variable frequency power supply control cabinet reverse side internal structure schematic diagram for high-voltage electrostatic precipitator.

Illustration of the drawings:

1. a main heat dissipation fan; 2. an IGBT; 3. a rectifier bridge; 4. a heat sink; 5. a circuit breaker; 6. an auxiliary electrical part; 7. laminating copper bars; 8. a smoothing capacitor; 9. a control box fixing hole; 10. an auxiliary heat dissipation fan; 11. a current transformer; 12. a precharge controller; 13. a reactor; 14. a rear door; 15. an incoming line input end a; 16. an incoming line input end b; 17. an incoming line input end c; 18. an outgoing line output end d; 19. An outgoing line output end f; 20. a front door; 21. a vent; 22. a cabinet body.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-3, a high-power high-voltage variable frequency power supply control cabinet for high-voltage electrostatic dust removal comprises a cabinet body 22, a front door 20 is fixedly arranged at the front end of the cabinet body 22, a control box fixing hole 9 is fixedly arranged on the front door 20, a rear door 14 is fixedly arranged at the rear end of the cabinet body 22, a main radiating fan 1 is fixedly arranged at one end of the cabinet body 22, an IGBT2 is fixedly arranged at one end of the front side of the inner plate of the cabinet body 22 close to the main radiating fan 1, a rectifier bridge 3 is arranged at one end of the IGBT2 far away from the main radiating fan 1, a radiator 4 is arranged at one end of the rectifier bridge 3 far away from the IGBT2, a laminated copper bar 7 is arranged above the IGBT2, a flat wave capacitor 8 is arranged on the laminated copper bar 7, an auxiliary radiating fan 10 is fixedly arranged at one end of the laminated copper bar 7 far away from the main radiating fan 1, the fixed current transformer 11 that is provided with in one side that cabinet 22 inner panel rear side is close to main radiator 1, and one side that main radiator 1 was kept away from to current transformer 11 is provided with precharge controller 12, and the one end that current transformer 11 was kept away from to precharge controller 12 is fixed and is provided with reactor 13, and reactor 13 output is connected with rectifier bridge 3 input. The reactor 13 can meet the requirement of the breaking capacity of the breaker 5, and when the breaker 5 appears, the reactor 13 is connected in series, so that the short-circuit impedance is increased, and the short-circuit current is limited. When short circuit occurs, the voltage drop on the reactor 13 is large, the bus voltage level is maintained, voltage fluctuation is reduced, and the operation stability of the electrical elements on a non-fault line is ensured, an incoming line input end a15 is arranged on one side, away from the pre-charge controller 12, of the reactor 13, an incoming line input end b16 is arranged below an incoming line input end a15, an incoming line input end c17 is arranged below an incoming line input end b16, an outgoing line output end d18 is arranged below an incoming line input end c17, and an outgoing line output end f19 is arranged below an outgoing line output end d 18.

The main heat radiator 1 includes: fan mount, fan, water conservancy diversion circle and wind channel all fixedly on 20 and the back door 14 of qianmen are provided with vent 21, rectifier bridge 3, include: the six-pulse half-controlled rectifier unit comprises a radiating fin and a six-pulse half-controlled rectifier unit arranged on the radiating fin, wherein a reactor 13 is arranged on a reactor 13 fixing frame at the lower part of the inner side of a cabinet body 22, and an incoming line input end a15, an incoming line input end b16, an incoming line input end c17, an outgoing line output end d18 and an outgoing line output end f19 are all arranged below the reactor 13.

The working principle is as follows: with the structure, different combinations of parallel connection of the IGBTs 2 can be performed according to different output power requirements. Single-phase full-bridge inverter circuit, every looks can single IGBT2, two parallelly connected IGBTs 2, three parallelly connected IGBT2 uses, three-phase bridge type inverter circuit, every looks can single IGBT2, two parallelly connected IGBTs 2 use, according to actual output power demand, arbitrary combination is selected, need not change any structure simultaneously, only needs increase and decrease IGBT2 parallelly connected quantity, can satisfy the requirement.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. The utility model provides a high-power high-voltage variable frequency power supply switch board for high-pressure electrostatic precipitator, includes the cabinet body (22), its characterized in that: a front door (20) is fixedly arranged at the front end of the cabinet body (22), a control box fixing hole (9) is fixedly arranged on the front door (20), a rear door (14) is fixedly arranged at the rear end of the cabinet body (22), a main radiating fan (1) is fixedly arranged at one end of the cabinet body (22), an IGBT (2) is fixedly arranged at one end, close to the main radiating fan (1), of the front side of the inner plate of the cabinet body (22), a rectifier bridge (3) is arranged at one end, far away from the main radiating fan (1), of the IGBT (2), a radiator (4) is arranged at one end, far away from the IGBT (2), of the rectifier bridge (3), a laminated copper bar (7) is arranged above the IGBT (2), a flat wave capacitor (8) is arranged on the laminated copper bar (7), an auxiliary radiating fan (10) is fixedly arranged at one end, far away from the main radiating fan (1), of the laminated copper bar (7), and a circuit breaker (5) is, an auxiliary electric part (6) is arranged at one end of the breaker (5) far away from the radiator (4), a current transformer (11) is fixedly arranged on one side of the rear side of the inner plate of the cabinet body (22) close to the main radiating fan (1), a pre-charging controller (12) is arranged on one side of the current transformer (11) far away from the main radiating fan (1), one end of the pre-charging controller (12) far away from the current transformer (11) is fixedly provided with a reactor (13), an incoming line input end a (15) is arranged on one side of the reactor (13) far away from the pre-charging controller (12), an inlet wire input end b (16) is arranged below the inlet wire input end a (15), an incoming line input end c (17) is arranged below the incoming line input end b (16), an outgoing line output end d (18) is arranged below the incoming line input end c (17), and an outgoing line output end f (19) is arranged below the outgoing line output end d (18).

2. The high-power high-voltage variable-frequency power supply control cabinet for high-voltage electrostatic dust collection according to claim 1, characterized in that: the main heat radiating fan (1) includes: fan mount, fan, water conservancy diversion circle and wind channel.

3. The high-power high-voltage variable-frequency power supply control cabinet for high-voltage electrostatic dust collection according to claim 1, characterized in that: and ventilation openings (21) are fixedly arranged on the front door (20) and the rear door (14).

4. The high-power high-voltage variable-frequency power supply control cabinet for high-voltage electrostatic dust collection according to claim 1, characterized in that: the rectifier bridge (3) comprises: the six-pulse half-controlled rectifier unit comprises a radiating fin and a six-pulse half-controlled rectifier unit arranged on the radiating fin.

5. The high-power high-voltage variable-frequency power supply control cabinet for high-voltage electrostatic dust collection according to claim 1, characterized in that: the reactor (13) is arranged on a reactor fixing frame at the lower part of the inner side of the cabinet body (22).

6. The high-power high-voltage variable-frequency power supply control cabinet for high-voltage electrostatic dust collection according to claim 1, characterized in that: the incoming line input end a (15), the incoming line input end b (16), the incoming line input end c (17), the outgoing line output end d (18) and the outgoing line output end f (19) are all arranged below the reactor (13).