CN-121976958-A - Centrifugal pump unit with circuit protection function

CN121976958ACN 121976958 ACN121976958 ACN 121976958ACN-121976958-A

Abstract

The invention discloses a centrifugal pump unit with a circuit protection function, which relates to the technical field of water pump control boxes, and comprises a water pump control box, wherein a frequency converter for regulating and controlling the running current of a centrifugal pump is arranged in the water pump control box, the frequency converter can limit the running current interval of the centrifugal pump, a protection component for controlling the on-off of the circuit is arranged on the side part of the frequency converter, the protection component comprises a driving motor, the driving motor can drive the protection component to act when in operation so as to realize the on-off protection of the circuit of the frequency converter, the driving motor reversely acts and is matched with the elastic reset of a connecting spring, so that a wire contact head can be attached to a base again, the complexity of maintenance operation and the cost of consumable materials are greatly reduced, particularly, for the water supply scene of a deeply buried centrifugal pump, a large tool is not required to be used for disassembling a pipeline and replacing a part after equipment is failed, the water supply can be quickly recovered, the water supply duration of a water supply scene such as a house is effectively shortened, and the water continuity of the scene such as a house is guaranteed.

Inventors

LIU JINZHAO
ZHAO GUANGMIN
ZHANG JIZHONG
BAO ZHE
QIAO XIAOFEI
Lang Penglin
WANG JUNSHAN
YAO YOUHAI
QIN ZHENJUN
JIA WEILU
Du Chenji

Assignees

内蒙古山金昶泰矿业有限责任公司

Dates

Publication Date: 20260505
Application Date: 20260409

Claims (10)

1. The centrifugal pump unit with the circuit protection function comprises a water pump control box and is characterized in that a frequency converter for regulating and controlling the running current of a centrifugal pump is arranged in the water pump control box, the frequency converter can limit the running current interval of the centrifugal pump, a protection component for controlling the on-off of a circuit is arranged on the side part of the frequency converter, the protection component comprises a driving motor, and the driving motor can drive the protection component to act during the running process so as to realize the on-off protection of the circuit of the frequency converter.
2. The centrifugal pump unit with a circuit protection function according to claim 1, wherein a control module for collecting operation signals of a water supply system and outputting regulation and control instructions is arranged in the water pump control box, a frequency converter for receiving the instructions to regulate operation parameters of the centrifugal pump is arranged below the control module, a contactor is arranged on the side portion of the frequency converter in a nearby mode, and wires for transmitting electric signals and electric energy are arranged among the components.
3. The centrifugal pump unit with the circuit protection function according to claim 1, wherein the protection component comprises an external sleeve, the external sleeve is sleeved outside a wire symmetrically distributed at the rear side of the frequency converter, and the external sleeve is in sliding connection with the wire.
4. The centrifugal pump unit with a circuit protection function according to claim 3, wherein an energizing contact is arranged at one end of the wire, far away from the frequency converter, the side wall of the water pump control box is provided with energizing bases corresponding to the energizing contact, an external connecting sleeve is sleeved outside the energizing contact of the wire, and a connecting spring is arranged between the external connecting sleeve and the external connecting sleeve.
5. The centrifugal pump unit with a circuit protection function according to claim 4, wherein the outer wall of the external connecting sleeve is symmetrically and fixedly connected with branch flexible shafts along the circumferential direction of the outer wall of the external connecting sleeve, the outer walls of the branch flexible shafts are fixedly connected with connecting crankshafts, the connecting crankshafts are divided into an upper group and a lower group along the axial direction of the external connecting sleeve, the connecting crankshafts of each group are symmetrically distributed by taking the axis of the external connecting sleeve as the symmetry center, and the connecting crankshafts of each group are jointly enclosed to form a diamond structure.
6. The centrifugal pump unit with circuit protection function according to claim 4, wherein a group of connecting crankshafts are located below the external connecting sleeve, one ends of the connecting crankshafts close to each other are fixedly connected with limiting blocks, the limiting blocks are fixedly connected to the inside of the water pump control box, a group of connecting crankshafts are located above the external connecting sleeve, one ends of the connecting crankshafts close to each other are fixedly connected with a nut collar, the nut collar is in sliding connection with the side wall of the water pump control box, the inner wall of the nut collar is in threaded connection with a threaded shaft, one ends of the threaded shaft, far away from the nut collar, are assembled on the outer wall of the output end of the driving motor, and a ball screw structure is formed between the nut collar and the threaded shaft.
7. A centrifugal pump unit with a circuit protection function according to claim 3, wherein a connecting hose is assembled between the external sleeve and the external sleeve, one end of the connecting hose is fixedly connected with the external sleeve, and the other end of the connecting hose is movably connected with the external sleeve.
8. The centrifugal pump unit with the circuit protection function according to claim 4, wherein the outer walls of the external connecting buckles are fixedly connected with branch convex shafts, the outer walls of the branch convex shafts are fixedly connected with crankshaft racks, the crankshaft racks are distributed in a staggered mode, one sides, close to each other, of the crankshaft racks are meshed with gear shafts, and one ends, far away from the crankshaft racks, of the gear shafts are assembled on the outer wall of the output end of the driving motor.
9. The centrifugal pump unit with the circuit protection function according to claim 1, wherein two sides of the water pump control box correspond to the outer sides of the power-on base, and are respectively and electrically connected with a vertical shaft centrifugal pump and a pool centrifugal pump through external wires.
10. A centrifugal pump unit with a circuit protection function according to claim 1 is characterized in that a water level detection device is assembled in a water pump control box and is in signal connection with a control module and used for collecting liquid level data of a family pond in real time, when the liquid level is lower than 50%, a vertical shaft centrifugal pump is triggered to start, and when the liquid level is higher than 80%, the vertical shaft centrifugal pump is triggered to stop, a frequency converter in the water pump control box is electrically connected with the pond centrifugal pump and used for receiving signals of a pressure sensor on a water storage tank and adjusting output frequency, so that operating power of the pond centrifugal pump is controlled, the pressure of the water storage tank is kept in a proper range, and meanwhile operating current of the pond centrifugal pump is limited in a proper range.

Description

Centrifugal pump unit with circuit protection function Technical Field The invention relates to the technical field of centrifugal pump control boxes, in particular to a centrifugal pump unit with a circuit protection function, which is suitable for electric control regulation and circuit protection of centrifugal pumps, in particular for centralized control, variable frequency speed regulation and fault circuit rapid on-off protection of deep buried vertical shaft centrifugal pumps and pool centrifugal pumps in civil constant-pressure water supply scenes and meets the operation regulation and safety protection requirements of centrifugal pump equipment. Background The constant-pressure water supply device is used as core domestic water guarantee equipment for office buildings, home and other scenes, and has the core requirements of taking into consideration the stability of water supply pressure, energy consumption economy and equipment operation safety by regulating and controlling the running state of the centrifugal pump, and meanwhile, the requirement of maintenance convenience of the deeply buried centrifugal pump is met. Along with the continuous promotion of domestic water demand, the constant pressure water supply device is to the technological evolution trend of "intelligent regulation and control is accurate, protect function is comprehensive, energy-conserving effect is showing and is simplifying in maintenance operation" increasingly stands out, becomes the key bottleneck that restricts civil water supply system upgrading optimization. In the civil constant pressure water supply field, the existing water supply control device adapting to the centrifugal pump has realized the basic water pumping and water supply regulation function, but still faces significant technical bottlenecks in practical application. The centrifugal pump of the other family members is very easy to burn pump faults due to the lack of necessary protection such as overcurrent, phase loss and undervoltage, the control device of the centrifugal pump of the pool of the family members has long service life and high fault rate, the variable frequency regulation and control based on pressure signals cannot be realized, the pressure fluctuation of water supply is large, the operation energy consumption is higher, the motor keeps high-current operation for a long time, meanwhile, the two centrifugal pumps are all arranged at the position 30-40 m below the ground, the pipeline is paved longer, the centrifugal pump and the pipeline are required to be extracted by a crane after the existing control device has faults, and the operation difficulty is high, the crane and the labor cost are also generated, and the maintenance cost is high. Therefore, development of a rapid assembly water supply device with intelligent regulation, comprehensive protection, energy conservation, high efficiency and convenient maintenance becomes a key technical problem to be broken through in the field. The prior art still has the following defects when being used specifically: The intelligent regulation and energy-saving design is lacking in that the conventional pool centrifugal pump is not provided with a variable frequency regulation structure, the running power cannot be dynamically regulated according to the pressure of the water storage tank, the water supply pressure is difficult to stabilize in a required range, the motor runs at rated high current for a long time, the energy consumption is serious, the energy-saving requirement is not met, and the variable frequency speed regulation running characteristic of the centrifugal pump cannot be adapted. The centrifugal pump of the existing vertical shaft lacks a water level linkage control mechanism, cannot be started and stopped automatically according to the liquid level of a water pool, is easy to cause overflow or water shortage idling, meanwhile, most devices lack multiple circuit protection such as overcurrent, phase shortage, undervoltage and the like of the centrifugal pump, the circuits cannot be cut off in time during faults, the risk of burning the centrifugal pump is high, even if part of devices have basic protection functions, most devices are of disposable disconnection structures, the operation can be recovered only by replacing parts after the faults are removed, and the maintenance efficiency is low. The circuit on-off and reset structure is unreasonable in design, the circuit protection of the traditional device is mostly dependent on a single electric element, lacks a mechanical and electric cooperative disconnection structure, is easy to generate protection failure under complex environments such as strong electromagnetic interference, is free of a special resettable disconnection mechanism, is complex in circuit recovery operation after failure, is lack of guiding and buffering design at a connection position, and is easy to influence the stable operation of the centrifugal pump due