CN214661012U

CN214661012U - Sewage treatment fan frequency conversion constant voltage speed governing PLC control system

Info

Publication number: CN214661012U
Application number: CN202121094108.3U
Authority: CN
Inventors: 罗来安
Original assignee: JIANGXI DACHENG INDUSTRY GROUP
Current assignee: JIANGXI DACHENG INDUSTRY GROUP
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2021-11-09
Anticipated expiration: 2031-05-21

Abstract

The utility model provides a sewage treatment fan frequency conversion constant voltage speed governing PLC control system, including PLC programmable controller, converter, first fan subassembly and second fan subassembly, the outside extension of PLC programmable controller has EM231 expansion module, the input of EM231 expansion module is equipped with first stator temperature sensor, first bearing temperature sensor, second stator temperature sensor and second bearing temperature sensor, the input of converter is equipped with air pressure sensor. The utility model discloses an air pressure sensor monitors sewage treatment device's endotracheal atmospheric pressure, and the converter carries out variable frequency speed control constant voltage operation according to sewage treatment device's endotracheal atmospheric pressure, provides constant voltage oxygenation for sewage treatment device, makes sewage treatment device reach higher treatment effect, and this system convenient operation, control accuracy is high, and response speed is fast, makes entire system work steady, and the power saving rate has huge energy-conserving benefit between 20% ~ 70% moreover.

Description

Sewage treatment fan frequency conversion constant voltage speed governing PLC control system

Technical Field

The utility model relates to a sewage treatment technical field specifically is a sewage treatment fan frequency conversion constant voltage speed governing PLC control system.

Background

In the process of sewage treatment, a fan system plays an extremely important role, which is a key link of sewage treatment, the fan is also a main device of a sewage treatment aerobic system, and the fan oxygenation is an important index of sewage treatment biochemical treatment.

The prior art has the following defects: the existing control system for sewage treatment cannot well control the oxygen increasing amount of equipment during working, and the sewage treatment quality is low; most of the systems adopt a relay contactor control system, but the control system has the defects of more elements, more mechanical contacts, particularly complex wiring, low reliability, difficulty in removing various faults and the like, and the fan always runs at a high speed, so that not only is the waste of electric energy caused, but also the fan is easy to generate faults, and the service life of the fan is shortened.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sewage treatment fan frequency conversion constant voltage speed governing PLC control system uses frequency conversion speed governing PLC control to make fan constant voltage oxygenation, makes sewage treatment device reach higher treatment effect, not only is favorable to prolonging the life of equipment, has still reached environmental protection and energy saving's effect.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a sewage treatment fan frequency conversion constant voltage speed governing PLC control system, includes PLC programmable controller, converter, first fan subassembly and second fan subassembly, the outside extension of PLC programmable controller has EM231 expansion module, the input of EM231 expansion module is equipped with first stator temperature sensor, first bearing temperature sensor, second stator temperature sensor and second bearing temperature sensor, the input of converter is equipped with air pressure sensor, the output of converter and PLC programmable controller all with first fan subassembly and second fan subassembly electric connection.

Preferably, the first stator temperature sensor and the first bearing temperature sensor are arranged at a stator and a bearing of the first fan assembly motor, and the second stator temperature sensor and the second bearing temperature sensor are arranged at a stator and a bearing of the second fan assembly motor.

Preferably, the output end of the PLC is provided with an audible and visual alarm, and the audible and visual alarm is electrically connected with the PLC.

Preferably, the input end of the PLC is provided with a switch signal lamp, and the switch signal lamp is electrically connected with the PLC.

Preferably, the EM231 expansion module is electrically connected to the PLC, and the first stator temperature sensor, the first bearing temperature sensor, the second stator temperature sensor, and the second bearing temperature sensor are electrically connected to the EM231 expansion module.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model not only simplifies the system by controlling the fan by PLC, improves the reliability and stability of the equipment, is convenient for operating and maintaining the equipment, saves energy consumption, greatly improves the safety factor of sewage treatment at the same time, adopts the air pressure sensor to monitor the air pressure in the air pipe of the sewage treatment equipment, and the frequency converter carries out frequency conversion speed regulation constant pressure operation according to the air pressure in the air pipe of the sewage treatment equipment, provides constant pressure oxygenation for the sewage treatment equipment, so that the sewage treatment equipment achieves higher treatment effect, and the transmission efficiency of the fan is improved because the frequency converter directly controls the fan to work, in addition, the acceleration and deceleration time of the frequency converter can be set arbitrarily, thereby avoiding the heavy current impact when the fan is started under full load, being beneficial to prolonging the service life of the equipment, the system has convenient operation, high control precision, fast response speed and stable operation of the whole system, and the power saving rate is between 20% and 70%, and the energy-saving effect is huge.

Drawings

FIG. 1 is a system frame diagram of the present invention;

fig. 2 is a circuit diagram of the frequency conversion control of the present invention.

Illustration of the drawings: 1. a first fan assembly; 2. a second fan assembly; 3. a PLC programmable controller; 4. an EM231 expansion module; 5. an air pressure sensor; 6. a first stator temperature sensor; 7. a first bearing temperature sensor; 8. a second stator temperature sensor; 9. a second bearing temperature sensor; 10. a frequency converter; 11. an audible and visual alarm; 12. and switching on or off the signal lamp.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

Referring to fig. 1-2, the present invention provides a technical solution: the utility model provides a sewage treatment fan frequency conversion constant voltage speed governing PLC control system, includes PLC programmable controller 3, converter 10, first fan subassembly 1 and

second fan subassembly

2, 3 outside extensions of PLC programmable controller have EM231 expansion module 4, the input of EM231 expansion module 4 is equipped with first stator temperature sensor 6, first bearing temperature sensor 7, second stator temperature sensor 8 and second bearing temperature sensor 9, the input of converter 10 is equipped with air pressure sensor 5, the output of converter 10 and PLC programmable controller 3 all with first fan subassembly 1 and second fan subassembly 2 electric connection.

The first stator temperature sensor 6 and the first bearing temperature sensor 7 are arranged at the stator and the bearing of the motor of the first fan component 1, the second stator temperature sensor 8 and the second bearing temperature sensor 9 are arranged at the stator and the bearing of the motor of the second fan component 2, the output end of the PLC 3 is provided with an audible and visual alarm 11, the audible and visual alarm 11 is electrically connected with the PLC 3, the input end of the PLC 3 is provided with a switch signal lamp 12, the switch signal lamp 12 is electrically connected with the PLC 3, the EM231 expansion module 4 is electrically connected with the PLC 3, the first stator temperature sensor 6, the first bearing temperature sensor 7, the second stator temperature sensor 8 and the second bearing temperature sensor 9 are electrically connected with the EM231 expansion module 4, an audible and visual alarm is given out through the arranged audible and visual alarm 11 when the system is in failure, and the arranged air pressure sensor 5 is arranged in an air pipe of the sewage treatment equipment.

The working principle is as follows: the first fan assembly 1 and the second fan assembly 2 operate alternately according to the time set by the requirement, if the first fan assembly 1 operates, the temperature of a motor stator and the temperature of a bearing of the first fan assembly 1 can rise after the first fan assembly 1 operates, the temperature of the motor stator and the temperature of the bearing of the first fan assembly 1 are monitored by the first stator temperature sensor 6 and the first bearing temperature sensor 7, and when the temperature of the stator or the temperature of the bearing exceeds a preset value, the PLC 3 automatically cuts off the power supply of the first fan assembly 1 and connects the second fan assembly 2 into operation. When the sewage treatment equipment operates, the air pressure sensor 5 monitors the air pressure in an air pipe of the sewage treatment equipment, when the air pressure in the air pipe of the sewage treatment equipment is at one atmospheric pressure or above a set certain atmospheric pressure numerical value, the working frequency of the current operation fan assembly is reduced by the frequency converter 10, and when the air pressure in the air pipe is lower than a set certain air pressure parameter, the working frequency of the current operation fan assembly is improved by the frequency converter 10, so that the air pressure in the air pipe of the sewage treatment equipment is kept constant, and the function of constant-pressure oxygen increasing for the sewage treatment equipment by the fan assembly is realized.

The foregoing merely illustrates preferred embodiments of the present invention, which are described in considerable detail and detail, but are not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several changes, modifications and substitutions can be made, which are all within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a sewage treatment fan frequency conversion constant voltage speed governing PLC control system which characterized in that: including PLC programmable controller (3), converter (10), first fan subassembly (1) and second fan subassembly (2), PLC programmable controller (3) outside extension has EM231 expansion module (4), the input of EM231 expansion module (4) is equipped with first stator temperature sensor (6), first bearing temperature sensor (7), second stator temperature sensor (8) and second bearing temperature sensor (9), the input of converter (10) is equipped with air pressure sensor (5), the output of converter (10) and PLC programmable controller (3) all with first fan subassembly (1) and second fan subassembly (2) electric connection.

2. The sewage treatment fan frequency conversion constant voltage speed governing PLC control system of claim 1, characterized in that: the first stator temperature sensor (6) and the first bearing temperature sensor (7) are arranged at the stator and the bearing of the motor of the first fan assembly (1), and the second stator temperature sensor (8) and the second bearing temperature sensor (9) are arranged at the stator and the bearing of the motor of the second fan assembly (2).

3. The sewage treatment fan frequency conversion constant voltage speed governing PLC control system of claim 1, characterized in that: the output end of the PLC (3) is provided with an audible and visual alarm (11), and the audible and visual alarm (11) is electrically connected with the PLC (3).

4. The sewage treatment fan frequency conversion constant voltage speed governing PLC control system of claim 1, characterized in that: the input end of the PLC (3) is provided with a switch signal lamp (12), and the switch signal lamp (12) is electrically connected with the PLC (3).

5. The sewage treatment fan frequency conversion constant voltage speed governing PLC control system of claim 1, characterized in that: the EM231 expansion module (4) is electrically connected with the PLC (programmable logic controller) (3), and the first stator temperature sensor (6), the first bearing temperature sensor (7), the second stator temperature sensor (8) and the second bearing temperature sensor (9) are electrically connected with the EM231 expansion module (4).