I want to install a float in the deep well to automatically control the pump to start and stop, how

The humidity of the deep well is large and the space is small, so it is easy to use the electronic water level switch.

1.Introduction: Electronic water level switch, used in kitchen kitchen oil sewage, seawater, acid and alkali brine, septic tank sewage, self-service car washing machine foam water, viscous laundry detergent, pickling pool, industrial wastewater, water tower automatic water supply, water well water tower linkage automatic water supply, deep well water level control deep well water shortage protection, water purifier, pure water distilled water, pure water, seawater desalination, mine water level automatic alarm, air conditioning, hot water circulation engineering, precious aquaculture industry, automatic drainage of the basement field of the community, elevator puddle drainage, The water level switch of the vegetable washing machine, the water level switch of the fruit and vegetable detoxification machine, the water level switch used with the PLC and other equipment, etc., is characterized by no float and reed switch, no mechanical action outside, the liquid can be operated by immersing in a certain area of the water level switch, the plastic shell is not long scale, stain-resistant and durable, not afraid of the influence of floating objects, flexible installation, suitable for long-term immersion in water. Plastic, metal tanks, concrete pools, etc. can be used. (Electronic level switch).

2.Working principle: The water level is detected by the built-in electronic probe, and then the detected signal is processed by the special chip for water level detection, when the measured liquid reaches the action point, the chip outputs a high or low level signal, and then cooperates with the PLC or water level controller, which can realize semi-automatic or fully automatic water level control.

As shown in the figure, when the water level rises to a higher water level, the float relay FZ1 is closed, J1 is excited, and the J1 open contact starts the contactor of the pump motor (figure omitted), and at the same time, another pair of permanent contacts are connected in parallel with FZ1 to self-maintain. If the water level rises again, when the FZ2 closes when it rises to the standby alarm water level, start J2 and start the standby pump. When the water level drops to the stop water level, FZ3 closes, J3 excites, and its normally closed node disconnects the starting circuit of the working pump and the standby pump.

The start and stop of the pump is controlled by the contactor, and the contactor is controlled by the contact of the float switch to control the on/off of the wire pack. It is best to add a button for manual control. For safety reasons, it is best to use a low-voltage power supply for the control loop.

Why is it used? It's a bit dangerous to settle in a deep well.

Install a float in the deep well to automatically control the pump to start and stop, because the float is not easy to install and fix in the downhole, it is recommended that you have a level controller, which is simple to install and has high reliability.

Go to the electromechanical market to buy a float, 10-30 yuan, connect to your water pump, very simple

It's as simple as using a float level gauge.

I don't want a circuit diagram...

Jinan Huateng Electronics **** is specialized in the water level wireless automatic control system, no wiring, the signal used is mobile or Unicom mobile phone signal. When the water level reaches high water level or low water level, it can automatically control the start and stop of the water pump, and send relevant alarm information to the user's mobile phone, which realizes fully automatic management, saves the cost of wiring, and the cable anti-theft problem of wiring, 0531-88116689 is their ** You can contact them and ask for information.

It is possible to install a float level controller or two float switches.

**Not very expensive either.

I am a centralized emulsion filtration system, and I work in Yantai Chengbo Machinery Technology; For some grinding machine factories and bearing factories to support paper belt filters, the liquid level control system is often used to control the start and stop of the liquid supply pump.

I think you mean there's a pool of water that pumps water into the pool, right, the design should be, with a level float, two proximity switches, one high to control the pump to stop, and the other low to control the pump to start.

Using float level switch, it is a device that relies on the buoyancy of the liquid to change its own state to achieve the purpose of control. It is connected by a cable, placed above the liquid level, and is equipped with a switch inside, when the liquid level reaches or drops to a certain height, the float level switch changes the original erected or inclined state, the internal switch state changes, and the signal is transmitted to the control mechanism.

You can give it to me, say a**.

I have a picture that I can give you, but you are too stingy to give us a cent, so how can you work for you?

There is an old Chinese saying: I want the horse to run, and I want the horse not to eat grass. Sweat.

I won't give it to you, people are poor, and their tone is still big.

With an AC contactor, two micro switches and float brackets to form a deep water well, or a well, water level control circuit, through the actual use of units and families for 3 years has been verified, the effect is very good, and the maintenance amount is equal to zero. The circuit is shown in the figure. Close the QSL, K1, and K2 limit switches.

K1 is normally open, and K2 is normally closed. km is an AC contactor.

When the well and water level are at high water level, relying on the top force of the float rod, the float connecting rod is raised and 1 K1 normally open contact is turned on, and the power supply passes through L to K1, K2, km coil N to form a power supply circuit. The AC contactor coil is energized and sucked to work, and the main contact of KM is connected to the main power supply to rotate the motor and start pumping. When the water level of the well gradually drops, the float connecting rod protrusion L detaches K1.

The auxiliary contact of i( i is self-locking, and the motor continues to pump water with electricity. When the water level drops to the well, when the lower limit water level switch k2, the float connecting rod protrudes 2 and the normally closed contact k2 of the limit switch is disconnected, and the AC contactor coil is powered off, and the km auxiliary contact and the main contact are released to disconnect the main power supply motor to stop, and the pumping is also stopped accordingly.

As the water level of the well rises, the process is repeated, and so on.

Component selection: limit switch K1, K2, choose LXWS-11G2 (contact current is 6A), KM is AC contactor model CJO-20A, coil suction voltage is 220V. The float support is made of epoxy glass cloth plate, and the size is determined according to the corresponding height specified by the deep water well and water level.

Insulating bakelite board 20 100mm. Other parts can be customized according to the requirements in the drawing.

Precautions: (1) Bakelite boards, control circuits, limit switches and other accessories should be windproof, rain, snow, etc.; (2) Three-phase power supply can also be changed to power supply according to the need, and the AC contactor suction coil is 380V, but the wiring method remains unchanged.

Buy a Zhuoyi water level controller, and then add a contactor to control it directly, the lowest cost control is simple and reliable.

Use the principle of leverage to operate! Below the water level, the float sinks and touches the upper switch (there is a contactor!) Add water to a certain amount of float and touch the lower switch! Automatic power off! I can't send pictures on my phone.

To put it simply, add a small control box to the power supply of the pump, then take out a float power switch from the pump, put it in your pool, and then fix the float switch wire 20 cm close to the float at the height you want.

It should be replenished when the water level is lower than the lower limit of the float, and stop when it is higher than the upper limit. When the float sags, the inner contact of the float is closed, and the contactor is sucked and the water begins to be replenished; When the tip of the float is up (the slider in the float slides down and the contacts are separated), the contactor separates and the water replenishment stops. The contactor should not be self-locked, and the coil of the contactor should only be connected in series with the float.

This one is very simple, no drawings are needed.

If it is not good for the pump according to his method, it will start and stop at once. It is better to use the water level automaton, 3-wire. When the water arrives.

Start the pump when you drop below the middle line. Stop when you reach the top line. In this way, the pump will work at a continuous speed for a period of time.

Install a hydraulic control valve.

Install a travel switch outside the water tank, connect a rope on the float valve (not easy to corrode, loose), the float can be properly counterweighted, when the water level drops, the float sinks, pull the travel switch through the rope (wire, etc.), and then the switch is connected to the pump for power supply, when the water level of the water tank reaches a certain height, the float is lifted, and the switch is naturally cut off.

You can refer to the design diagram below.

Just install a pressure controller, turn it on when the pressure is high, and turn it off when it's low. You can use the electric contact pressure gauge, but please use a 24-volt AC power supply, otherwise it is easy to have a safety accident.

Controlled by electric contact pressure gauge...

Can you go into a little more detail?

The problem is a bit less professional. What signals do you want to start and stop based on?

Normally, there should be a contactor, if not, string on one line of the single-phase pump, and use two wires connected at a low level.