Dual-redundancy switching control device for cold air blower

Abstract

The utility model discloses a cold air blower dual-redundancy switching control device which comprises a first high-voltage branching cabinet and a second high-voltage branching cabinet, the first high-voltage branching cabinet is arranged on the side face of the second high-voltage branching cabinet, and a plant power supply penetrates through the side wall of the first high-voltage branching cabinet through a wire and is electrically connected with a second vacuum circuit breaker and a UPS uninterruptible power supply. The output end of the UPS is electrically connected with a first vacuum circuit breaker, the first vacuum circuit breaker and the second vacuum circuit breaker are connected in parallel and are electrically connected with a third vacuum circuit breaker and a fourth vacuum circuit breaker which are connected in parallel through a wire penetrating through the side wall of the second high-voltage branching cabinet, and the third vacuum circuit breaker is electrically connected with a first high-voltage frequency converter; according to the utility model, fault undisturbed switching of the high-voltage frequency converter is realized, and the control switching speed is improved, thereby reducing hidden dangers and improving the safety factor.

Description

TECHNICAL FIELD

[0001] The utility model application relates to fan control technical field, specifically is a kind of cold drum fan double redundancy switching control device. BACKGROUND

[0002] In prior art, when the cold drum fan control system of coking plant is caused to stop due to frequency converter failure or other reasons, the fan stop will cause coking coke oven to smoke, cause environmental protection accident and a series of major security risks, the current fan control system cannot realize fault automatic identification switching, the redundancy switching mode in prior art mainly has that high-voltage frequency converter is switched by fiber control, is switched by PLC control frequency converter, but the fiber control communication board of high-voltage frequency converter is very easy to damage, often causes equipment to be unable to switch normally, and high-voltage frequency converter redundancy switching system requires extremely high power grid data, voltage, current fluctuation etc.

[0003] Therefore, design a kind of high-voltage frequency converter fault non-disturbance switching, improve control switching speed to reduce hidden danger and improve safety factor device, which is the problem to be solved by the inventor. CONTENT OF UTILITY MODEL

[0004] In view of the deficiencies of prior art, the purpose of the utility model is to provide a kind of cold drum fan double redundancy switching control device, can realize flue gas waste heat recycling, improve waste heat utilization rate, save the function of cost.

[0005] The technical scheme adopted by the utility model device is: a kind of cold drum fan double redundancy switching control device, it includes first high-voltage distribution cabinet, second high-voltage distribution cabinet, the first high-voltage distribution cabinet is arranged at the side of second high-voltage distribution cabinet, plant power supply is connected with second vacuum circuit breaker, UPS uninterruptible power supply respectively by wire passing through the side wall of first high-voltage distribution cabinet, the output of the UPS uninterruptible power supply is electrically connected with first vacuum circuit breaker, the first vacuum circuit breaker, second vacuum circuit breaker are connected in parallel and are connected with parallelly connected third vacuum circuit breaker, fourth vacuum circuit breaker by wire passing through the side wall of second high-voltage distribution cabinet, the third vacuum circuit breaker is electrically connected with first high-voltage frequency converter, the fourth vacuum circuit breaker is electrically connected with second high-voltage frequency converter, the output of the first high-voltage frequency converter is electrically connected with fifth vacuum circuit breaker, the output of the second high-voltage frequency converter is electrically connected with sixth vacuum circuit breaker, the fifth vacuum circuit breaker, sixth vacuum circuit breaker are connected in parallel and are connected with cold drum fan.

[0006] Further, it further includes controller, and the controller is arranged at the outside of first high-voltage distribution cabinet, second high-voltage distribution cabinet.

[0007] Further, the controller is electrically connected with the first vacuum circuit breaker, the second vacuum circuit breaker, the third vacuum circuit breaker, the fourth vacuum circuit breaker, the fifth vacuum circuit breaker, the sixth vacuum circuit breaker, the UPS uninterrupted power supply, the first high-voltage frequency converter and the second high-voltage frequency converter through wires respectively.

[0008] Further, the first vacuum circuit breaker, the fourth vacuum circuit breaker and the sixth vacuum circuit breaker are in the open state in normal condition, and the second vacuum circuit breaker, the third vacuum circuit breaker and the fifth vacuum circuit breaker are in the closed state in normal condition.

[0009] Further, the controller is connected with an external warning light.

[0010] Further, the controller is connected with an external buzzer.

[0011] The device has the following beneficial effects:

[0012] 1. The device adopts a double-redundancy control mode, sets two high-voltage distribution cabinets and two high-voltage frequency converters, and cooperates with the UPS uninterrupted power supply to realize fault switching under the unified control of the controller, realizes disturbance-free switching of the high-voltage frequency converter, improves the control switching speed, and reduces the hidden danger and improves the safety factor. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a structural schematic view of the device.

[0014] The reference signs are explained as follows: 1 - first high-voltage distribution cabinet; 2 - second high-voltage distribution cabinet; 3 - plant power supply; 4 - UPS uninterrupted power supply; 5 - first vacuum circuit breaker; 6 - second vacuum circuit breaker; 7 - third vacuum circuit breaker; 8 - fourth vacuum circuit breaker; 9 - first high-voltage frequency converter; 10 - second high-voltage frequency converter; 11 - fifth vacuum circuit breaker; 12 - sixth vacuum circuit breaker; 13 - cold air blower; 14 - controller. DETAILED DESCRIPTION

[0015] The device will be further described below in combination with specific embodiments, and the embodiments are only used for illustrating the device and not for limiting the scope of the device. In addition, it should be understood that after reading the content of the device, those skilled in the art can make various changes or modifications to the device, and these equivalent forms also fall within the scope defined by the appended claims.

[0016] Reference is made to Figure 1It is the utility model structure schematic drawing, a cold drum fan double redundancy switching control device, it includes first high voltage distribution cabinet 1, second high voltage distribution cabinet 2, first high voltage distribution cabinet 1 is arranged at the side of second high voltage distribution cabinet 2, first high voltage distribution cabinet 1 is used for the distribution control of power supply part, second high voltage distribution cabinet 2 is used for the distribution control of frequency converter, factory power supply 3 passes through the lateral wall of first high voltage distribution cabinet 1 respectively electrically connected with second vacuum circuit breaker 6, UPS uninterrupted power supply 4, the output of UPS uninterrupted power supply 4 is electrically connected with first vacuum circuit breaker 5, first vacuum circuit breaker 5, second vacuum circuit breaker 6 are connected in parallel and are electrically connected with parallelly connected third vacuum circuit breaker 7, fourth vacuum circuit breaker 8 through the lateral wall of second high voltage distribution cabinet 2, second vacuum circuit breaker 6 is used to control the power supply passway of factory power supply 3 and the inside element of second high voltage distribution cabinet 2, first vacuum circuit breaker 5 is used to control the power supply passway of UPS uninterrupted power supply 4 and the inside element of second high voltage distribution cabinet 2.

[0017] Third vacuum circuit breaker 7 is electrically connected with first high voltage frequency converter 9, fourth vacuum circuit breaker 8 is electrically connected with second high voltage frequency converter 10, the output of first high voltage frequency converter 9 is electrically connected with fifth vacuum circuit breaker 11, the output of second high voltage frequency converter 10 is electrically connected with sixth vacuum circuit breaker 12, fifth vacuum circuit breaker 11, sixth vacuum circuit breaker 12 are connected in parallel and are connected with cold drum fan 13, the power supply transferred from the direction of first high voltage distribution cabinet 1 enters two parallelly arranged high voltage frequency converters through third air circuit breaker, fourth air circuit breaker, two high voltage frequency converters are in the use state under normal circumstances, and another is in the hot standby state high voltage frequency converter, and the use state is switched by third vacuum circuit breaker 7, fourth vacuum circuit breaker 8, fifth vacuum circuit breaker 11, sixth vacuum circuit breaker 12.

[0018] It further includes controller 14, and the controller 14 is arranged at the outside of first high voltage distribution cabinet 1 and second high voltage distribution cabinet 2, and the controller 14 is respectively connected with first vacuum circuit breaker 5, second vacuum circuit breaker 6, third vacuum circuit breaker 7, fourth vacuum circuit breaker 8, fifth vacuum circuit breaker 11, sixth vacuum circuit breaker 12, UPS uninterrupted power supply 4, first high voltage frequency converter 9 and second high voltage frequency converter 10 through wires, and the power supply of the controller 14 is provided by the UPS uninterrupted power supply 4.

[0019] First vacuum circuit breaker 5, fourth vacuum circuit breaker 8 and sixth vacuum circuit breaker 12 are in the open state under normal circumstances, and second vacuum circuit breaker 6, third vacuum circuit breaker 7 and fifth vacuum circuit breaker 11 are in the closed state under normal circumstances, at this time, the high voltage frequency converter is not powered by UPS uninterrupted power supply 4, but is powered by factory power supply 3, and the power supply enters first high voltage frequency converter 9 through third vacuum circuit breaker 7, and then enters cold drum fan 13 through fifth vacuum circuit breaker 11.

[0020] When the power supply 3 is disconnected due to an accident, the controller 14 controls the second vacuum circuit breaker 6 to be disconnected, and the first vacuum circuit breaker 5 to be closed, so as to connect the UPS uninterrupted power supply 4 and the internal elements of the second high-voltage distribution cabinet 2, and the power supply is provided by the UPS uninterrupted power supply 4.

[0021] When one of the two high-voltage frequency converters fails, the controller 14 receives the failure signal sent by the high-voltage frequency converter, controls the vacuum circuit breaker at the input and output of the failed high-voltage frequency converter to be disconnected, and controls the vacuum circuit breaker at the input and output of the other high-voltage frequency converter in the hot standby state to be closed, so as to realize instantaneous and undisturbed switching, the high-voltage frequency converter realizes V / F speed tracking control, automatically identifies the frequency of the cold air blower 13, and the control system automatically gives a related operating frequency signal, the cold air blower 13 control system is controlled by a DCS system, and a redundant switching card and a double data exchange system are used in signal processing, so that data undisturbed millisecond switching can be realized.

[0022] In order to better alarm, the controller 14 is connected with an external warning light, and the controller 14 is connected with an external buzzer.

[0023] The utility model adopts the control mode of double redundancy, sets up two high-voltage distribution cabinets, two high-voltage frequency converters cooperate with the UPS uninterrupted power supply 4 and is controlled by the controller 14 to switch when failing, realizes high-voltage frequency converter failure undisturbed switching, improves control switching speed and reduces hidden danger and improves the function of safety factor.

Claims

1. A dual-redundant switching control device for a cold blower, characterized in that: The system includes a first high-voltage distribution cabinet (1) and a second high-voltage distribution cabinet (2). The first high-voltage distribution cabinet (1) is located on the side of the second high-voltage distribution cabinet (2). The plant power supply (3) is electrically connected to a second vacuum circuit breaker (6) and a UPS uninterruptible power supply (4) respectively through a wire passing through the side wall of the first high-voltage distribution cabinet (1). The output terminal of the UPS uninterruptible power supply (4) is electrically connected to the first vacuum circuit breaker (5). The first vacuum circuit breaker (5) and the second vacuum circuit breaker (6) are connected in parallel and electrically connected through a wire passing through the side wall of the second high-voltage distribution cabinet (2). There are a third vacuum circuit breaker (7) and a fourth vacuum circuit breaker (8) connected in parallel. The third vacuum circuit breaker (7) is electrically connected to a first high-voltage frequency converter (9). The fourth vacuum circuit breaker (8) is electrically connected to a second high-voltage frequency converter (10). The output terminal of the first high-voltage frequency converter (9) is electrically connected to a fifth vacuum circuit breaker (11). The output terminal of the second high-voltage frequency converter (10) is electrically connected to a sixth vacuum circuit breaker (12). The fifth vacuum circuit breaker (11) and the sixth vacuum circuit breaker (12) are connected in parallel and connected to a cold blower (13).

2. The dual-redundant switching control device for a cold blower according to claim 1, characterized in that: It also includes a controller (14), which is located outside the first high-voltage distribution cabinet (1) and the second high-voltage distribution cabinet (2).

3. The dual-redundant switching control device for a cold blower according to claim 2, characterized in that: The controller (14) is electrically connected to the first vacuum circuit breaker (5), the second vacuum circuit breaker (6), the third vacuum circuit breaker (7), the fourth vacuum circuit breaker (8), the fifth vacuum circuit breaker (11), the sixth vacuum circuit breaker (12), the UPS uninterruptible power supply (4), the first high-voltage frequency converter (9), and the second high-voltage frequency converter (10) via wires.

4. The dual-redundant switching control device for a cold blower according to claim 1, characterized in that: The first vacuum circuit breaker (5), the fourth vacuum circuit breaker (8), and the sixth vacuum circuit breaker (12) are normally in the open state, while the second vacuum circuit breaker (6), the third vacuum circuit breaker (7), and the fifth vacuum circuit breaker (11) are normally in the closed state.

5. The dual-redundant switching control device for a cold blower according to claim 2, characterized in that: The controller (14) is connected to an external warning light.

6. The dual-redundant switching control device for a cold blower according to claim 2, characterized in that: The controller (14) is connected to an external buzzer alarm.

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