Manual switching cabinet of high-voltage frequency converter

Abstract

The utility model relates to a manual switching cabinet of a high-voltage frequency converter, which comprises a cabinet body, an input isolating switch, an output isolating switch and a porcelain hoist, and the input isolating switch, the output isolating switch and the porcelain hoist are arranged in the cabinet body. The device is characterized in that the input isolating switch and the output isolating switch are respectively arranged above and below the middle rear part of the cabinet body, the input copper bar is connected with high-voltage alternating current and is connected with the short circuit bar through a cable, a wiring end on the input isolating switch is connected with an input end of the frequency converter, and an output end of the frequency converter is connected with the first switching bar; and the lower wiring end of the output isolating switch is connected with a load. According to the manual switching cabinet of the high-voltage frequency converter, the output isolating switch is arranged below the output isolating switch, so that the width of the manual switching cabinet can be effectively reduced, the occupied area is reduced, the cost is also reduced, and the manual switching cabinet has higher market competitiveness; the output isolation switch realizes mechanical interlocking of frequency conversion output and power frequency output of the manual switching cabinet of the high-voltage frequency converter, and ensures switching safety.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of manual switching cabinet, belong to electrical technology field, more specifically, especially, a kind of high-voltage frequency converter manual switching cabinet. BACKGROUND

[0002] In recent years, with the market competition of high-voltage frequency converter more and more fierce, the size and price of product are higher and higher in competition, affected by the size of disconnecting switch, the size of high-voltage frequency converter manual switching cabinet on the market is mostly about 1000mm, i.e. about 1 meter, the size of this manual switching cabinet is large, the floor area is large, and the cost is high. Under the condition of the size of manual switching cabinet is relatively large, it is more complex than small size switching cabinet in packaging, transportation, storage and other aspects, and it increases unnecessary cost invisibly. How to reduce the size of switching cabinet without affecting the performance of product becomes a new key point of switching cabinet design.

[0003] For high-voltage frequency converter manual switching cabinet, it is required to meet the frequency conversion connection requirement of load, meet the switching connection requirement of power supply loop, and meet the interlocking of frequency conversion output and power output, to avoid the situation that frequency conversion output and power output are connected at the same time. SUMMARY

[0004] The utility model discloses in order to overcome the shortcoming of above-mentioned technical problem, provide a kind of high-voltage frequency converter manual switching cabinet.

[0005] The high-voltage frequency converter manual switching cabinet of the utility model, including cabinet and setting in the input disconnecting switch, output disconnecting switch and porcelain hoist in cabinet body, cabinet body is provided with input disconnecting switch operating mechanism and output disconnecting switch operating mechanism;Input disconnecting switch is made of input disconnecting switch movable contact, input disconnecting switch upper terminal and input disconnecting switch lower terminal, and output disconnecting switch is made of output disconnecting switch movable contact, output disconnecting switch upper terminal and output disconnecting switch lower terminal;Input disconnecting switch movable contact is electrically connected with input disconnecting switch lower terminal, and output disconnecting switch movable contact is electrically connected with output disconnecting switch lower terminal;Its characterized in that: input disconnecting switch and output disconnecting switch are respectively arranged in the upper side and lower side of rear part in cabinet, and input disconnecting switch lower terminal and output disconnecting switch upper terminal are connected through short-circuiting row, and porcelain hoist is arranged on the cabinet body of the front side of output disconnecting switch movable contact, and porcelain hoist is fixed with porcelain hoist copper row, and porcelain hoist copper row is connected with first switching row through second switching row;

[0006] The side wall in the cabinet body is fixed with an input copper bar, the input copper bar is connected with high-voltage alternating current output by a switch cabinet of a user on site, the input copper bar is connected with a short-circuit bar through a cable, an upper connecting terminal of an input isolating switch is connected with an input terminal of a high-voltage frequency converter, an output terminal of the high-voltage frequency converter is connected with a first switching bar, and a lower connecting terminal of the output isolating switch is connected with a motor load.

[0007] The high-voltage frequency converter manual switching cabinet, the input isolating switch operating mechanism and the output isolating switch operating mechanism are all composed of a panel, a rotating disc, a cover plate and a driving shaft, the panel is fixed on the cabinet body, the rotating disc and the cover plate are fixed on the panel, and the driving shaft is arranged on the rotating disc.

[0008] The high-voltage frequency converter manual switching cabinet, the panel is provided with an observation hole for displaying the state of the input isolating switch and the output isolating switch.

[0009] The high-voltage frequency converter manual switching cabinet, the first switching bar is fixed on the cabinet body through a switching insulator, and the porcelain hoist is fixed on the cabinet body through a porcelain hoist support.

[0010] The high-voltage frequency converter manual switching cabinet, the input copper bar is fixed on the cabinet body through a live display insulator, and the cabinet body is fixed with a live display on the outer surface.

[0011] The high-voltage frequency converter manual switching cabinet, the cabinet body is provided with an observation window for observing the internal state of the cabinet body.

[0012] The high-voltage frequency converter manual switching cabinet, the cabinet body is provided with an observation window for observing the internal state of the cabinet body.

[0013] The utility model discloses a high -voltage frequency changer manual switching cabinet, by the cabinet body and set up in the input, output disconnecting circuit breaker in the cabinet constitute, and the output disconnecting circuit breaker is located the below of output disconnecting circuit breaker, can effectively reduce the width of the high -voltage frequency changer manual switching cabinet formed like this, make its width less than 1m, reduced floor space, also reduced the cost, make it have higher market competitiveness, simultaneously, the high -voltage alternating current of external input is connected with the lower wiring terminal of input disconnecting circuit breaker and the upper wiring terminal of output disconnecting circuit breaker in proper order through input copper row, short -circuit row, the upper wiring terminal of input disconnecting circuit breaker is connected with the input of high -voltage frequency changer, and the output of high -voltage frequency changer is connected with porcelain gourd copper row in proper order through first adapter piece, second adapter piece, and the lower wiring terminal of output disconnecting circuit breaker is connected with motor class load, like this, when input disconnecting circuit breaker movable contact and its upper wiring terminal are connected, and output disconnecting circuit breaker movable contact and porcelain gourd copper row are connected, manual switching cabinet is frequency conversion output, when output disconnecting circuit breaker movable contact and its upper wiring terminal are connected, manual switching cabinet is power frequency output, like this, output disconnecting circuit breaker realizes the mechanical interlock of frequency conversion output and power frequency output of high -voltage frequency changer manual switching cabinet, ensures the frequency conversion, power frequency switching safety of manual switching cabinet, avoids the loss caused by the misoperation of field user. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the front view of the high -voltage frequency changer manual switching cabinet of the utility model;

[0015] Figure 2 It is the left view of the high -voltage frequency changer manual switching cabinet of the utility model;

[0016] Figure 3 It is Figure 1 The sectional view of middle A-A section;

[0017] Figure 4 And Figure 5 All are the perspective drawing of the high -voltage frequency changer manual switching cabinet of the utility model;

[0018] Figure 6 And Figure 7 It is the front view and perspective drawing of input, output disconnecting circuit breaker operating mechanism in the utility model respectively.

[0019] In the figure: 1 is an input isolating switch, 1-1 is a movable contact of the input isolating switch, 1-2 is an upper terminal of the input isolating switch, 1-3 is a lower terminal of the input isolating switch, 2 is an output isolating switch, 2-1 is a movable contact of the output isolating switch, 2-2 is an upper terminal of the output isolating switch, 2-3 is a lower terminal of the output isolating switch, 3 is a cabinet, 4 is an input copper bar, 5 is a live display insulator, 6 is a live display, 7 is a short-circuiting bar, 8 is a first switching bar, 9 is a switching insulator, 10 is a second switching bar, 11 is a porcelain hoist support, 12 is a porcelain hoist, 13 is an operating mechanism of the input isolating switch, 14 is an operating mechanism of the output isolating switch, 13-1 is a panel, 13-2 is a rotating disc, 13-3 is a cover plate, 13-4 is a driving shaft, 13-5 is an observation hole, 15 is an electromagnetic lock, 16 is a rotating shaft of the input isolating switch, 17 is a rotating shaft of the output isolating switch, 18 is an observation window, 19 is a secondary device mounting box, and 20 is a porcelain hoist copper bar. DETAILED DESCRIPTION

[0020] The utility model will be further explained in connection with the drawings and examples.

[0021] As shown in Figure 1 and Figure 2 , the front view, the left view, Figure 4 and Figure 5 the perspective view of the high-voltage frequency converter manual switching cabinet of the utility model are respectively given, Figure 3 the sectional view of A-A section in Figure 1 is given, the high-voltage frequency converter manual switching cabinet shown in the figure is composed of the cabinet 3 and the input isolating switch 1, the output isolating switch 2, the input copper bar 4, the short-circuiting bar 7, the first switching bar 8, the second switching bar 10, the porcelain hoist 12 and the porcelain hoist copper bar 20 arranged in the cabinet, the cabinet 3 plays a fixing and supporting role, and the input isolating switch 1 and the output isolating switch 2 are respectively arranged above and below the rear part of the cabinet 3. Since the output isolating switch 2 is arranged below the input isolating switch 1, the width of the cabinet 3 formed can be reduced, the volume of the high-voltage frequency converter formed is reduced, the cost is lowered, and the high-voltage frequency converter has higher market competitiveness.

[0022] The input isolating switch 1 shown is composed of the movable contact 1-1 of the input isolating switch, the upper terminal 1-2 of the input isolating switch and the lower terminal 1-3 of the input isolating switch, and the movable contact 1-1 of the input isolating switch is electrically connected with the lower terminal 1-3 of the input isolating switch. The output isolating switch 2 shown is composed of the movable contact 2-1 of the output isolating switch, the upper terminal 2-2 of the output isolating switch and the lower terminal 2-3 of the output isolating switch, and the movable contact 2-1 of the output isolating switch is electrically connected with the lower terminal 2-3 of the output isolating switch. The cabinet 3 outside the movable contact 2-1 of the output isolating switch is fixed with the porcelain hoist 12, the porcelain hoist 12 is fixed on the solid 3 through the porcelain hoist support 11, and the porcelain hoist 12 is fixed with the porcelain hoist copper bar 20 matched with the movable contact 2-1 of the output isolating switch.

[0023] The side of the cabinet 3 is provided with an input disconnecting switch operating mechanism 13 and an output disconnecting switch operating mechanism 14, which control the on-off state of the input disconnecting switch 1 and the output disconnecting switch 2 respectively. The input disconnecting switch operating mechanism 13 drives the input disconnecting switch movable contact 1-1 to rotate through the input disconnecting switch rotating shaft 16, so as to control the input disconnecting switch movable contact 1-1 to switch between the contact connection and disconnection with the input disconnecting switch upper terminal 1-2. The output disconnecting switch operating mechanism 14 drives the output disconnecting switch movable contact 2-1 to rotate through the output disconnecting switch rotating shaft 17, so as to control the output disconnecting switch movable contact 2-1 to switch between the contact with the porcelain insulator copper bar 20 and the output disconnecting switch upper terminal 2-2.

[0024] The porcelain insulator copper bar 20 is connected with a second adapter bar 10, the second adapter bar 10 is connected with a first adapter bar 8, and the first adapter bar 8 is fixed on the cabinet 3 through an adapter insulator 9. The cabinet 3 is provided with an input copper bar 4, which is fixed on the cabinet 3 through a live display insulator 5, and a live display 6 is fixed on the side wall of the cabinet 3, which detects whether the input copper bar 4 is connected with high-voltage alternating current. The input disconnecting switch lower terminal 2-3 is connected with the output disconnecting switch upper terminal 2-2 through a short-circuit bar 7.

[0025] The high-voltage alternating current input from outside (the output of the switch cabinet of the field user) is connected with the input copper bar 4, the input disconnecting switch upper terminal 1-2 is connected with the input of the high-voltage frequency converter, the input of the high-voltage frequency converter is connected with the first adapter bar 8, and the output disconnecting switch lower terminal 2-3 is connected with the motor load.

[0026] In this way, only when the input disconnecting switch movable contact 1-1 is connected with the input disconnecting switch upper terminal 1-2 and the output disconnecting switch movable contact 2-1 is connected with the porcelain insulator copper bar 20, the high-voltage frequency converter can control the load to be frequency-converted, i.e. frequency-converted output; when the output disconnecting switch movable contact 2-1 is connected with the output disconnecting switch upper terminal 2-2, the power frequency high-voltage electricity output through the input copper bar 4 is sequentially connected with the short-circuit bar 7, the output disconnecting switch upper terminal 2-2, and the output disconnecting switch lower terminal 2-3 to supply power to the load, i.e. power frequency output. It can be seen that, since the output disconnecting switch movable contact 2-1 can only be selectively connected with the porcelain insulator copper bar 20 or the output disconnecting switch upper terminal 2-2 at the same time, i.e. mechanical interlocking of the frequency-converted output and the power frequency output is realized, which ensures the safety of the power supply of the high-voltage frequency converter manual switching cabinet.

[0027] As shown in Figure 6 and Figure 7As shown, the input and output isolating switch operating mechanism are respectively the front view and the perspective view of the utility model, the input isolating switch operating mechanism 13 and the output isolating switch operating mechanism 14 shown are all by panel 13-1, turntable 13-2, cover plate 13-3 and drive shaft 13-4 constitute, the panel 13-1 is fixed on the side of cabinet body, the turntable 13-2 and the cover plate 13-3 are fixed on the panel 13-1, the drive shaft 13-4 is arranged on the turntable 13-2, the drive shaft 13-4 is fixedly connected with the input isolating switch pivot 16 or the output isolating switch pivot 17.In the outside of cabinet door, the drive shaft 13-4 is rotated by using the rocking handle, and the input isolating switch pivot 16 or the output isolating switch pivot 17 can be driven to rotate, the silk screen printing is done on the turntable 13-2, the observation hole 13-4 is reserved on the panel 13-1, the position of isolating switch is confirmed by the printing feature of the silk that leaks out through the observation hole 13-4, the notch is left on the turntable 13-2, the locking is carried out by using the electromagnetic lock 14 tongue, and it is ensured that the behavior of operating isolating switch with live wire does not appear.

[0028] As shown, the front cabinet door of the cabinet body 3 is provided with an observation window 16, the state of the isolating switch can be directly observed through the observation window 16, further avoiding the behavior of misoperation of the isolating switch. The secondary device installation box 17 is arranged in the cabinet body 3, which is used to install one after another manual switching cabinet main circuit device state points and other secondary devices.

Claims

1. A high-voltage frequency converter manual switching cabinet, comprising a cabinet body (3) and input disconnecting switches (1), output disconnecting switches (2) and porcelain pulleys (12) arranged in the cabinet body, the cabinet body being provided with input disconnecting switch operating mechanisms (13) and output disconnecting switch operating mechanisms (14); the input disconnecting switch is composed of an input disconnecting switch movable contact (1-1), an input disconnecting switch upper connecting terminal (1-2) and an input disconnecting switch lower connecting terminal (1-3), and the output disconnecting switch is composed of an output disconnecting switch movable contact (2-1), an output disconnecting switch upper connecting terminal (2-2) and an output disconnecting switch lower connecting terminal (2-3); the input disconnecting switch movable contact is electrically connected with the input disconnecting switch lower connecting terminal, and the output disconnecting switch movable contact is electrically connected with the output disconnecting switch lower connecting terminal; characterized in that: The input disconnecting switch and the output disconnecting switch are arranged above and below the rear part of the cabinet respectively, the lower connecting terminal of the input disconnecting switch is connected with the upper connecting terminal of the output disconnecting switch through the short-circuiting row (7), the porcelain dropper is arranged on the cabinet in front of the movable contact of the output disconnecting switch, the porcelain dropper is fixed with the porcelain dropper copper row (20), the porcelain dropper copper row is connected with the first switching row (8) through the second switching row (10); The side wall inside the cabinet is fixed with the input copper row (4), the input copper row is connected with the high-voltage alternating current output by the switch cabinet of the on-site user, the input copper row is connected with the short-circuiting row through the cable, the upper connecting terminal of the input disconnecting switch is connected with the input terminal of the high-voltage frequency converter, the output terminal of the high-voltage frequency converter is connected with the first switching row, and the lower connecting terminal of the output disconnecting switch is connected with the motor load; the input disconnecting switch operating mechanism is used for controlling the connection and disconnection of the movable contact of the input disconnecting switch and the upper connecting terminal of the input disconnecting switch, and the output disconnecting switch operating mechanism is used for controlling the selective connection and disconnection of the movable contact of the output disconnecting switch, the porcelain dropper copper row and the upper connecting terminal of the output disconnecting switch.

2. The high voltage VSC manual transfer switchgear according to claim 1, characterized in that: The input disconnecting switch operating mechanism (13) and the output disconnecting switch operating mechanism (14) are both composed of a panel (13-1), a rotating disc (13-2), a cover plate (13-3) and a driving shaft (13-4), the panel is fixed on the cabinet (3), the rotating disc and the cover plate are fixed on the panel, and the driving shaft is arranged on the rotating disc; the driving shaft on the input disconnecting switch operating mechanism drives the movable contact of the input disconnecting switch to rotate through the input disconnecting switch rotating shaft (16), and the driving shaft on the output disconnecting switch operating mechanism drives the movable contact of the output disconnecting switch to rotate through the output disconnecting switch rotating shaft (17).

3. The high voltage VSC manual transfer switchgear according to claim 2, characterized in that: The panel (13-1) is provided with an observation hole (13-5) for displaying the state of the input disconnecting switch (1) and the output disconnecting switch (2).

4. The high voltage VSC manual transfer switchgear according to claim 1 or 2, characterized in that: The first switching row (8) is fixed on the cabinet (3) through the switching insulator (9), and the porcelain dropper (12) is fixed on the cabinet through the porcelain dropper support (11).

5. The high voltage VSC manual transfer switchgear according to claim 1 or 2, characterized in that: The input copper row (4) is fixed on the cabinet (3) through the live display insulator (5), and the live display (6) is fixed on the outer surface of the cabinet.

6. The high voltage VSC manual transfer switchgear according to claim 1 or 2, characterized in that: The cabinet (3) is provided with an observation window (18) for observing the internal state of the cabinet.

7. The high voltage VSC manual transfer switchgear according to claim 1 or 2, characterized in that: The inside of the cabinet (3) is provided with a secondary device mounting box (19).

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