CN-224214418-U - Multi-fan soft start control cabinet with standby functions

CN224214418UCN 224214418 UCN224214418 UCN 224214418UCN-224214418-U

Abstract

The utility model relates to a soft start control cabinet, in particular to a multi-fan soft start control cabinet which is mutually standby, comprising a control switch assembly, a fan main loop and a control loop, wherein the control switch assembly comprises a main breaker and a plurality of shunt breakers, and the output end of the main breaker is connected with each shunt breaker through a parallel branch; the fan main loop is provided with at least one mutual backup interconnection contactor and more than two fan control loops, the loops are connected with the main breaker through the shunt breaker, soft start paths of any two loops are connected with each other in a bridging way through the mutual backup interconnection contactor, each loop is connected with one fan, and a PLC (programmable logic controller) of the control loop is connected with the mutual backup interconnection contactor, the main breaker and the shunt breaker. The control cabinet remarkably improves the reliability and continuity of the multi-fan system, reduces the hardware redundancy cost, is suitable for scenes with high requirements on starting stability, such as industrial ventilation, environment-friendly equipment, energy power and the like, and can ensure production safety and realize intelligent control.

Inventors

ZHAO HONGGANG
GUO SHIQUAN
ZHAO LEI
MA JIHUI

Assignees

上海震业环境科技有限公司

Dates

Publication Date: 20260508
Application Date: 20250523

Claims (10)

1. The utility model provides a multi-fan soft start control cabinet for each other is reserve which characterized in that, multi-fan soft start control cabinet includes: the control switch assembly comprises a main breaker connected with a three-phase power supply and a plurality of shunt breakers, wherein the output end of the main breaker is connected to each shunt breaker in a tapping mode through a plurality of parallel branches; The system comprises a main fan loop, a soft start path, a control loop and a control loop, wherein the main fan loop comprises at least one mutual backup interconnection contactor and at least two fan control loops, and the fan control loops are connected with the main circuit breaker through corresponding shunt circuit breakers; And the control loop comprises a PLC controller, and the PLC controller is connected with the mutual backup interconnection contactor, the main circuit breaker and the plurality of shunt circuit breakers.
2. The multi-fan soft start control cabinet of claim 1, wherein the fan control loop is configured as a first fan control loop and a second fan control loop, a first soft start path in the first fan control loop is connected to a first fan, a second soft start path in the second fan control loop is connected to a second fan, and the inter-backup interconnection contactor is connected across the first soft start path and the second soft start path simultaneously.
3. The multi-fan soft start control cabinet of claim 2, wherein the first fan control loop comprises a first bypass path, a first contactor and a first thermal relay are arranged on the first bypass path, a main wire inlet terminal of the first contactor is connected with a corresponding shunt circuit breaker, a main wire outlet terminal of the first contactor is connected with a main wire inlet terminal of the first thermal relay, and a main wire outlet terminal of the first thermal relay is connected with the first fan; The first soft start path is provided with a first soft starter and a third contactor, a main incoming line terminal of the first soft starter is connected with a corresponding shunt circuit breaker, a main outgoing line terminal of the first soft starter is connected with a main incoming line terminal of the third contactor, and a main outgoing line terminal of the third contactor is connected with a first fan.
4. The multi-fan soft start control cabinet of claim 3, wherein the second fan control loop comprises a second bypass operation path, a second contactor and a second thermal relay are arranged on the second bypass operation path, a main wire inlet terminal of the second contactor is connected with a corresponding shunt circuit breaker, a main wire outlet terminal of the second contactor is connected with a main wire inlet terminal of the second thermal relay, and a main wire outlet terminal of the second thermal relay is connected with the second fan; The second soft start path is provided with a second soft starter and a fifth contactor, a main incoming line terminal of the second soft starter is connected with a corresponding shunt circuit breaker, a main outgoing line terminal of the second soft starter is connected with a main incoming line terminal of the fifth contactor, and a main outgoing line terminal of the fifth contactor is connected with a second fan.
5. The multi-fan soft start control cabinet of claim 4, wherein the inter-backup interconnection contactor comprises a fourth contactor, a sixth contactor, and a seventh contactor, the fourth contactor connected between the third contactor and the first fan, the sixth contactor connected between the fifth contactor and the second fan, and a main inlet terminal of the fourth contactor and a main inlet terminal of the sixth contactor connected through the seventh contactor.
6. The multi-fan soft start control cabinet of claim 5, wherein the fourth contactor, the sixth contactor, and the seventh contactor are all connected to the PLC controller.
7. The multi-fan soft start control cabinet of claim 4, wherein the first contactor, the second contactor, the third contactor, and the fifth contactor are all connected to the PLC controller.
8. The multi-fan soft start control cabinet of claim 4, wherein the first thermal relay and the second thermal relay are both connected to the PLC controller.
9. The multi-fan soft start control cabinet of claim 4, further comprising a switching power supply, wherein an output of the main breaker is connected to the switching power supply.
10. The multi-fan soft start control cabinet of claim 9, further comprising a fuse through which an output of the main breaker is connected to the switching power supply.

Description

Multi-fan soft start control cabinet with standby functions Technical Field The utility model relates to a soft start control cabinet, in particular to a multi-fan soft start control cabinet which is mutually standby. Background In a high-power fan control system, a soft starter is used as a core control unit and is mainly used for realizing the stable start of a fan. As shown in figure 1, the soft starter is connected in series between a three-phase alternating current power supply (U/V/W) and a fan stator winding by a three-phase anti-parallel thyristor voltage regulating circuit, and the input voltage of the motor is regulated by precisely regulating the conduction angle of the thyristor. The working principle is that when the device works, the control main board sends synchronous trigger signals through the pulse trigger module according to preset starting curve parameters, and the conduction angle is dynamically adjusted. When the motor is started, the conduction angle is gradually increased from zero, the voltage at the motor end is smoothly increased according to a preset function, the torque and the rotating speed are steadily increased, smooth starting is realized, and after the rated rotating speed is reached, the thyristor is fully conducted, and the motor operates at the rated voltage. When parking, the control main board reversely adjusts the conduction angle, reduces the voltage of the motor terminal, and realizes soft parking. At present, independent multi-fan soft start cabinets commonly adopt a one-to-one independent control architecture. Under the structure, each soft starter is connected with a single fan in a one-to-one correspondence manner to form a dedicated driving loop, so that independent and accurate regulation and control of operation parameters such as start and stop, rotation speed and the like of each fan are realized, and diversified working condition requirements are adapted. However, the one-to-one independent control architecture described above has significant technical drawbacks. Once a soft starter corresponding to a certain fan fails, the fan loses starting capability due to the specificity of a driving circuit, so that the interruption of the whole production flow is caused, and the production efficiency and the continuity are seriously affected. If the reliability of the system is improved, a backup mechanism is constructed by adding a redundant soft starter, and the problem of shutdown caused by faults can be solved, but the hardware purchase cost, the equipment installation space requirement and the complexity of system operation and maintenance are greatly increased, so that the effective balance between the reliability improvement and the cost control is difficult to realize. Disclosure of utility model Therefore, the technical problem to be solved by the utility model is to overcome the problems that the corresponding fan cannot be started and the production flow is interrupted due to the failure of the soft starter under the existing one-to-one independent control architecture, and the problem of shutdown can be solved by adding a redundancy soft starter construction backup mechanism, but the problems of high hardware purchase cost, large equipment installation space requirement and complex system operation and maintenance exist. In order to solve the technical problems, the utility model provides the multi-fan soft start control cabinet which is mutually standby, the effect that soft starters in two soft start cabinets with the same power are mutually standby can be realized, and when one soft starter fails, the other soft starter can be started in an emergency mode, so that the stability and the safety of production are ensured. Specifically, the multi-fan soft start control cabinet comprises a control switch assembly, a fan main loop and a control loop, wherein, The control switch assembly comprises a main breaker connected with a three-phase power supply and a plurality of shunt breakers, and the output end of the main breaker is connected to each shunt breaker in a tapping mode through a plurality of parallel branches; The fan main circuit comprises at least one mutual backup interconnection contactor and at least two fan control circuits, wherein the fan control circuits are correspondingly connected with all branches of the main circuit breaker one by one through corresponding shunt circuit breakers; the control loop comprises a PLC controller, and the PLC controller is connected with the mutual backup interconnection contactor, the main circuit breaker and the plurality of shunt circuit breakers. In one embodiment of the utility model, the fan control loop is configured into a first fan control loop and a second fan control loop, a first soft start path in the first fan control loop is connected with the first fan, a second soft start path in the second fan control loop is connected with the second fan, and the mutual backup interconnection contactor is