CN202651876U - A dual power supply intelligent protection control device for sewage pump - Google Patents

Abstract

The utility model discloses a dual power supply intelligent protection control device for a sewage pump, which comprises a dual power supply automatic controller, a current contactor, a thermal overload relay, a digital time relay, a universal transfer switch, an intermediate relay, a control system, and a sewage pump; Contactors can be used in combination, such as a group of two or a group of three. When one of them exceeds eight hours or fails, it will automatically switch to another AC contactor. When the sewage water level is at a low level, the water level sensor transmits the signal to the universal switch, and the universal switch is in the working state of No. 1 or No. 2 pump; when the sewage water level is at a high level, the water level sensor transmits the signal to the universal switch, The universal transfer switch is in the simultaneous working state of No. 1 and No. 2 sewage pumps to increase the sewage discharge. The utility model mainly provides an intelligent protection control device for dual power sources of a sewage pump, which can automatically switch power sources, protect the sewage pump from overheating, protect phases, and automatically adjust the sewage discharge volume.

Description

A dual power supply intelligent protection control device for sewage pump

technical field

The utility model relates to an electrical protection control device, in particular to an intelligent protection control device with dual power sources for a sewage pump.

Background technique

With the rapid development of science and technology, sewage pumps have higher and higher requirements on the reliability of power supply. If the power supply is suddenly interrupted, it will affect people's lives and even endanger safety; At present, there are two main problems with the safety of the sewage pump: one is the stability of the power supply; the other is whether the sewage pump can operate normally at full load. The original sewage pump control device only includes a dual power supply automatic controller, and only one contactor and thermal overload relay are installed at the main power supply end and the backup power supply end. If at least one of the current contactors or thermal overload relays at both ends fails , Then it will also affect the normal work of the sewage pump, and there are many potential safety hazards.

Utility model content

The utility model mainly provides an intelligent protection control device for dual power sources of a sewage pump, which can automatically switch power sources, protect the sewage pump from overheating, protect phases, and automatically adjust the sewage discharge volume.

An intelligent protection control device with dual power sources for a sewage pump includes a dual power supply automatic controller, a current contactor, a thermal overload relay, a digital time relay, a universal transfer switch, an intermediate relay, a control system, and a sewage pump; the dual power supply automatic controller is connected to a power supply, Including main power supply, backup power supply, small molded case circuit breaker, dual power supply automatic-manual transfer switch, manual power transfer handle, power supply working indicator light, main power supply working indicator light, backup power supply working indicator light; AC contactor works for eight hours The utility model has 4 AC contactors in total, 2 of which are respectively connected to the main power supply and the backup power supply, and the other end is connected to the thermal overload relay, which acts as an intermediate relay in the electrical protection control device, and can be used at the same time Combined use, such as a group of two, a group of three, when one of them exceeds eight hours or fails, it will automatically switch to another AC contactor to prevent the failure of the contactor from affecting the work of electrical equipment; The overload relay is connected with the sewage pump, which is mainly used to protect the normal operation of the sewage pump. When the current passes through the heating element of the thermal overload relay, the metal of the heating element is heated and bent to push the action mechanism to drive the contact, thereby disconnecting the control circuit of the electrical equipment. Realize the disconnection of electrical equipment, and automatically switch to the backup power supply. The digital time relay is connected with the main power supply and the backup power supply, which mainly plays the role of delaying the conversion of the sewage pump and power supply, so as to ensure the normal operation of the sewage pump when switching the sewage pump and power supply. The intermediate relay is connected with the control system and the universal transfer switch, which is used to enhance the signal sent by the control system, so that the signal acts on the universal transfer switch, and the universal transfer switch acts according to the signal to control the work of the sewage pump; the universal transfer switch has 3 control switches , which are the working switch of No. 1 sewage pump, the working switch of No. 2 sewage pump, and the simultaneous working switch of No. 1 and No. 2 sewage pumps; when the sewage water level is at a low water level, the water level sensor transmits the signal to the universal switch It is in the working state of the No. 1 or No. 2 pump; when the sewage water level is at a high level, the water level sensor sends a signal to the universal switch, and the universal switch is in the working state of the No. 1 and No. 2 sewage pumps at the same time, increasing the sewage discharge.

Dual power automatic-manual transfer switch is divided into automatic and manual. When the voltage is normal, the automatic switch will automatically switch the power supply; no matter whether the main power supply and the backup power supply have voltage or not, the manual power switch handle can be used to manually operate the power conversion; , the dual power supply automatic-manual switch should be placed in the manual position, and when the manual power switching handle is rotated counterclockwise to the terminal, the backup power supply will execute the circuit breaker opening, and the main power supply will execute the circuit breaker closing; when the manual power switching handle is rotated clockwise When reaching the terminal, the main power supply performs the opening of the circuit breaker, and the backup power supply performs the closing of the circuit breaker.

The dual power supply automatic controller has the function of electrical interlock and mechanical interlock, which ensures that the two power supplies cannot supply power at the same time; When the main power supply is connected to the load, the working indicator light of the main power supply is on; if the main power supply fails, the main power supply automatically switches to the backup power supply, and the working indicator light of the backup power supply is on.

Description of drawings

Figure 1: Schematic diagram of the structure of a sewage pump dual power supply intelligent protection control device;

Figure 2: Structural diagram of dual power supply automatic controller.

Detailed ways

An intelligent protection control device with dual power sources for sewage pumps includes a dual power supply automatic controller (1), a current contactor, a thermal overload relay, a digital time relay, a universal transfer switch, an intermediate relay, a control system, and a sewage pump; the dual power supply automatic controller ( 1) Connect to the power supply, including main power supply (21), backup power supply (22), miniature molded case circuit breaker (23), dual power supply automatic-manual transfer switch (24), manual power transfer handle (25), power supply work indication Lamp (28), main power supply working indicator light (26), standby power supply working indicator light (27); It is connected with the main power supply and the backup power supply, and the other end is connected with the thermal overload relay, which acts as an intermediate relay in the electrical protection control device, and can be used in combination, such as a group of two, a group of three, when one of them exceeds eight hours Or after a failure, it will automatically switch to another AC contactor to prevent the work of the electrical equipment from being affected by the failure of the contactor; the thermal overload relay is connected to the sewage pump, which is mainly used to protect the normal operation of the sewage pump. When passing through the heating element of the thermal overload relay, the metal of the heating element is heated and bent to push the action mechanism to drive the contact, thereby disconnecting the control circuit of the electrical equipment to realize the disconnection of the electrical equipment, and automatically switching the backup power supply to work. The digital time relay is connected with the main power supply and the backup power supply, which mainly plays the role of delaying the conversion of the sewage pump and power supply, so as to ensure the normal operation of the sewage pump when switching the sewage pump and power supply. The intermediate relay is connected with the control system and the universal transfer switch, which is used to enhance the signal sent by the control system, so that the signal acts on the universal transfer switch, and the universal transfer switch acts according to the signal to control the work of the sewage pump; the universal transfer switch has 3 control switches , which are the working switch of No. 1 sewage pump, the working switch of No. 2 sewage pump, and the simultaneous working switch of No. 1 and No. 2 sewage pumps; when the sewage water level is at a low water level, the water level sensor transmits the signal to the universal switch It is in the working state of the No. 1 or No. 2 pump; when the sewage water level is at a high level, the water level sensor sends a signal to the universal switch, and the universal switch is in the working state of the No. 1 and No. 2 sewage pumps at the same time, increasing the sewage discharge.

The dual power supply automatic-manual transfer switch (24) is divided into automatic and manual. When the voltage is normal, the automatic switch will automatically switch the power supply; regardless of whether the main power supply (21) and the backup power supply (22) have voltage or not, the handle can be switched by manual power supply (25) to manually operate the power conversion; during manual operation, the dual power supply automatic-manual switch (24) should be placed in the manual position, and when the manual power switch handle (25) is rotated counterclockwise to the terminal, the backup power supply (22) will be executed The circuit breaker is opened, the main power supply (21) executes the circuit breaker closing; when the manual power switch handle (25) is rotated clockwise to the terminal, the main power supply (21) executes the circuit breaker opening, and the backup power supply (22) executes the circuit breaker close.

The dual power supply automatic controller (1) has the function of electrical interlock and mechanical interlock, which ensures that the two power supplies cannot supply power at the same time; when the voltage of the main power supply (21) is normal, The standby power supply (22) is turned off, the main power supply (21) is turned on to ensure that the main power supply (21) is connected to the load, and the main power supply working indicator light (26) is on; if the main power supply (21) fails, the main power supply will automatically switch to the standby power supply Power supply (22), standby power supply work indicator light (27) is bright.

Claims (3)

1. a dredge pump double-power intelligent protection control device comprises duplicate supply automatic controller (1), contactor, thermal overload relay, digital time relay, universal seclector, auxiliary relay, control system, dredge pump; Described duplicate supply automatic controller (1) is connected with power supply, comprises main power source (21), stand-by power supply (22), small-size moulded case circuit breaker (23), duplicate supply automatic-manual change-over switch (24), manual power change lever (25), power work indicator light (28), main power source relay indicating light (26), stand-by power supply relay indicating light (27).

2. a kind of dredge pump double-power intelligent according to claim 1 is protected control device; it is characterized in that: described universal seclector has 3 control switchs; be respectively the dredge pump operating switch No. one, No. two dredge pump operating switches, No. one, No. two dredge pump while operating switches.

3. a kind of dredge pump double-power intelligent according to claim 1 is protected control device; it is characterized in that: described A.C. contactor is the small-size contactor of eight-hour day; the utility model has 4 A.C. contactors; 2 at one end is connected with stand-by power supply with main power source respectively; the other end is connected with thermal overload relay; in the electric prospection control device, play auxiliary relay; can be used in combination simultaneously; such as two one group; triplets; after one of them surpasses eight hours or breaks down, can automatically switch to another A.C. contactor, prevent from affecting because of the fault of contactor the work of power consumption equipment.

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