CN219101553U

CN219101553U - Air-float machine dissolved air pump start-stop control circuit for sewage treatment

Info

Publication number: CN219101553U
Application number: CN202223546231.1U
Authority: CN
Inventors: 葛垚; 陈建军; 潘载昆; 项志峭; 廖承周; 曹建华; 朱秀秀
Original assignee: Chongqing Major Industrial Technology Research Institute Co ltd
Current assignee: Chongqing Major Industrial Technology Research Institute Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-05-30
Anticipated expiration: 2032-12-29

Abstract

The utility model discloses a starting and stopping control circuit for a dissolved air pump of an air flotation machine for sewage treatment, which is characterized in that: the motor power cord of air supporting quick-witted dissolved air pump is connected on the connection terminal, and three live wire of three phase power cord is in proper order through 3P sky open, 3P contactor and thermal overload relay back connection terminal, and 3 shelves knob switch configuration has start mode switch interface, automatic mode switch interface and stop mode switch interface, wherein: the input end of the starting mode switch interface is connected with any fire wire of the three-phase power line, the output end of the starting mode switch interface is connected to the zero line after passing through the normally closed switch of the thermal overload relay and the trigger coil of the 3P contactor in sequence, the input end of the automatic mode switch interface is connected with the actuator, and the output end of the automatic mode switch interface is connected with the output end of the starting mode switch interface. The effect is that: the free switching of the starting mode can be realized, the safety protection of the system can be realized, and the control is convenient, safe and stable.

Description

Air-float machine dissolved air pump start-stop control circuit for sewage treatment

Technical Field

The utility model relates to a sewage treatment technology, in particular to a starting and stopping control circuit of a dissolved air pump of an air flotation machine for sewage treatment.

Background

An air floatation machine is generally adopted in the sewage treatment process, and the working principle is as follows: air is introduced into the sewage to generate tiny bubbles, so that tiny suspended matters in the water are adhered to the air bubbles and float up to the water surface along with the bubbles to form scum, and then the scum is skimmed by a skimming device, thereby achieving the purposes of removing suspended matters in the water and improving the water quality.

In the prior art, the focus of attention is mostly to improve the structure of an air floatation device, for example, an integrated efficient dissolved air floatation machine disclosed in China patent 201821215107.8, and the safety and stability of equipment are improved by configuring a pressure reducing valve and a gas-water separation pipe with a multi-head structure. However, due to the severe environment of the sewage treatment plant, various electrical equipment is easy to fail in the operation process, so that the requirement on a control circuit of the equipment is high, the traditional equipment is usually controlled by adopting a simple manual control power switch, the form is single, and the current intelligent treatment requirement is difficult to meet.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide the starting and stopping control circuit for the dissolved air pump of the air flotation machine for sewage treatment, which can not only meet the local control, but also realize remote starting, and the running state of equipment can be fed back in real time, thereby improving the intelligent control degree of the equipment and ensuring the safe and stable running of the system.

In order to achieve the above purpose, the specific technical scheme adopted by the utility model is as follows:

a control circuit is stopped to air supporting machine dissolved air pump start for sewage treatment, its key lies in: the motor power cord of air supporting quick-witted dissolved air pump is connected on the connection terminal, the front end of connection terminal disposes 3P and opens, 3P contactor, thermal overload relay and 3 shelves knob switch, and three live wire of three phase power cord is passed through in proper order behind 3P opens, 3P contactor and the thermal overload relay connect the connection terminal, 3 shelves knob switch disposes start-up mode switch interface, automatic mode switch interface and stop mode switch interface, wherein: the input end of the starting mode switch interface is connected with any fire wire of the three-phase power line, the output end of the starting mode switch interface is connected to the zero line after passing through the normally closed switch of the thermal overload relay and the trigger coil of the 3P contactor in sequence, the input end of the automatic mode switch interface is connected with the actuator, and the output end of the automatic mode switch interface is connected with the output end of the starting mode switch interface.

Optionally, a switch signal detection interface is further arranged in the circuit, the switch signal detection interface is provided with a 12V detection power line, the 12V detection power line is connected with one end of a normally open switch of the 3P contactor, and the other end of the normally open switch of the 3P contactor is connected to the first switch signal detection port; the 12V detection power line is connected with one end of a normally open switch of the thermal overload relay, the other end of the normally open switch of the thermal overload relay is connected to a second switch signal detection port, the 12V detection power line is also connected with one end of a stop mode switch interface, and the other end of the stop mode switch interface is connected to a third switch signal detection port.

Optionally, the wire holder is further connected with a grounding row, and a protection grounding wire is further configured on a motor power wire of the air floatation machine dissolved air pump.

Optionally, a motor power line of the dissolved air pump of the air floatation machine adopts 4-core annealed copper wires with the length of 4mm < 2 >.

Optionally, the three live wires between the 3P open, the 3P contactor and the thermal overload relay are connected by adopting a annealed copper wire with the length of 4mm < 2 >.

Optionally, the connection line on the switch signal detection interface adopts a annealed copper wire of 0.75mm 2.

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

the utility model can realize free switching of the starting mode by configuring the 3-gear knob switch, can meet the local manual control, can realize remote automatic control, can realize the safety protection of the system by configuring the thermal overload relay, and can feed back the working state of the system by detecting each switch signal, thereby being convenient to control, safe and stable.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a circuit connection diagram of an embodiment of the present utility model.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, in the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

As shown in fig. 1, the embodiment provides a start-stop control circuit of an air-float machine dissolved air pump for sewage treatment, a motor power line of the air-float machine dissolved air pump is connected to a wire holder by adopting 4-core annealed copper wires with the length of 4mm < 2 >, a motor is powered by adopting a three-phase 4-wire power supply, a grounding row is connected to the wire holder, and a protection grounding wire is also arranged on the motor power line of the air-float machine dissolved air pump; the front end of wire holder disposes 3P and opens, 3P contactor, heat overload relay and 3 shelves rotary switch, and three live wire L1, L2, the L3 of three phase power cord adopts 4mm 2's annealed copper line to pass through in proper order 3P is opened, 3P contactor and heat overload relay back is connected the wire holder, 3 shelves rotary switch disposes start-up mode switch interface, automatic mode switch interface and stop mode switch interface, wherein: the input end of the starting mode switch interface is connected with any live wire of the three-phase power line, as shown in fig. 1, in this example, a annealed copper wire of 0.75mm2 is connected to the live wire L3, the output end of the starting mode switch interface sequentially passes through the normally closed switch of the thermal overload relay and the trigger coil of the 3P contactor and then is connected to the zero line, the input end of the automatic mode switch interface is connected with the actuator, and the output end of the automatic mode switch interface is connected with the output end of the starting mode switch interface.

As can be seen from fig. 1, in the implementation, a switching signal detection interface is further provided in the circuit, the switching signal detection interface is configured with a 12V detection power line (DC 12V), the 12V detection power line is connected with one end of a normally open switch of the 3P contactor, and the other end of the normally open switch of the 3P contactor is connected to the first switching signal detection port X1; the 12V detection power line is connected with one end of a normally open switch of the thermal overload relay, the other end of the normally open switch of the thermal overload relay is connected to a second switch signal detection port X2, the 12V detection power line is also connected with one end of a stop mode switch interface, the other end of the stop mode switch interface is connected to a third switch signal detection port X3, and a connecting line on the switch signal detection interface can also adopt a annealed copper wire of 0.75mm 2.

In the specific implementation, the air floatation machine solution pump adopts a 3-phase 1.5KW motor, the thermal overload relay can adopt an LRD22C thermal overload relay module produced by Schneider corporation, the setting current is 16-24A, the 3P contactor can adopt LC1D25M7C produced by Schneider corporation, the coil voltage is AC220V, and the model for 3P air exploitation is IC65N-25A.

The working principle of the utility model is as follows:

the device total power management can be realized by configuring a 3P air switch, the circuit fault and even potential safety hazard caused by motor stalling or circuit short circuit can be prevented by configuring a thermal overload relay, when the circuit is overheated, the thermal overload relay works, a normally closed switch NC is opened, so that a coil of the 3P contactor cannot receive a starting signal, a power supply circuit is opened, at the moment, a normally open switch NO of the thermal overload relay is closed, and the working state of the thermal overload relay can be detected by detecting a signal on a port X2 through a second switch signal; in addition, when the coil of the 3P contactor cannot receive the starting signal, the normally open switch of the 3P contactor is in an off state, so that the working state of the 3P contactor can be determined by acquiring the signal on the first switch signal detection port X1;

in order to realize the switching of the starting mode, different switch interfaces can be promoted to be closed by rotating a knob switch through the configuration of the 3-gear knob switch in a circuit, in the starting mode, the switch interfaces of the starting mode are closed, a starting signal is provided through any live wire, a coil of a 3P contactor is electrified after passing through a normally closed switch of a thermal overload relay, so that the 3P contactor is electrified, when the knob rotates to an automatic mode, the switch interfaces of the automatic mode are closed, a remote execution signal can be received through an actuator, the actuator outputs an execution signal S1, the working state control of the 3P contactor can still be realized after passing through the normally closed switch of the thermal overload relay, in a stopping mode, the switch interfaces of the stopping mode are closed, the coil of the 3P contactor is in a power-off state, and the circuit is in a stopping state through a signal on a third switch signal detection port X3.

In conclusion, the starting and stopping control circuit for the air flotation machine dissolved air pump for sewage treatment provided by the utility model has the advantages of simple circuit connection and convenience in control, the working mode of the system can be determined through detection of each switch state, the local control can be realized, the remote control can be realized, and the overload protection and the grounding protection are configured, so that the circuit is safe and reliable to operate, and the application scene requirement of intelligent sewage treatment is met.

It will be understood by those skilled in the art that various changes may be made in the details of the above-described embodiments and in the light of the equivalents of the claims to which they are entitled.

Claims

1. A control circuit is stopped to air supporting machine dissolved air pump start for sewage treatment, its characterized in that: the motor power cord of air supporting quick-witted dissolved air pump is connected on the connection terminal, the front end of connection terminal disposes 3P and opens, 3P contactor, thermal overload relay and 3 shelves knob switch, and three live wire of three phase power cord is passed through in proper order behind 3P opens, 3P contactor and the thermal overload relay connect the connection terminal, 3 shelves knob switch disposes start-up mode switch interface, automatic mode switch interface and stop mode switch interface, wherein: the input end of the starting mode switch interface is connected with any fire wire of the three-phase power line, the output end of the starting mode switch interface is connected to the zero line after passing through the normally closed switch of the thermal overload relay and the trigger coil of the 3P contactor in sequence, the input end of the automatic mode switch interface is connected with the actuator, and the output end of the automatic mode switch interface is connected with the output end of the starting mode switch interface.

2. The air flotation machine dissolved air pump start-stop control circuit for sewage treatment according to claim 1, wherein: the device is characterized by further comprising a switch signal detection interface, wherein the switch signal detection interface is provided with a 12V detection power line, the 12V detection power line is connected with one end of a normally open switch of the 3P contactor, and the other end of the normally open switch of the 3P contactor is connected to a first switch signal detection port; the 12V detection power line is connected with one end of a normally open switch of the thermal overload relay, the other end of the normally open switch of the thermal overload relay is connected to a second switch signal detection port, the 12V detection power line is also connected with one end of a stop mode switch interface, and the other end of the stop mode switch interface is connected to a third switch signal detection port.

3. The air flotation machine dissolved air pump start-stop control circuit for sewage treatment according to claim 1 or 2, wherein: the connection seat is also connected with a grounding row, and a protection grounding wire is also arranged on a motor power wire of the dissolved air pump of the air floatation machine.

4. The air flotation machine dissolved air pump start-stop control circuit for sewage treatment according to claim 3, wherein: the motor power line of the dissolved air pump of the air floatation machine adopts 4-core annealed copper wires with the length of 4mm < 2 >.

5. The air flotation machine dissolved air pump start-stop control circuit for sewage treatment according to claim 1, wherein: and three live wires between the 3P open and 3P contactor and the thermal overload relay are connected by adopting annealed copper wires with the length of 4mm 2.

6. The air flotation machine dissolved air pump start-stop control circuit for sewage treatment according to claim 2, wherein: and a connecting wire on the switch signal detection interface adopts a annealed copper wire of 0.75mm 2.