CN2145401Y

CN2145401Y - Automatic controllor for water lever

Info

Publication number: CN2145401Y
Application number: CN 92244680
Authority: CN
Inventors: 梁峰
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-12-14
Filing date: 1992-12-14
Publication date: 1993-11-03
Anticipated expiration: 2002-12-14

Abstract

The utility model relates to an automatic controller for water lever, which is composed of a detection circuit, a control circuit, a power supply circuit and a water pump motor. The automatic controller for water lever also comprises a control circuit composed of a transformer B1, rectifiers D1 and D2 connected to one end of the secondary pole of the transformer B1 and relays J1 and J2 connected to the other output end of the rectifiers D1 and D2, and a detection circuit composed of the T1 and the T2 of the other output end of the rectifiers D1 and D2 and the T3 of one end of the secondary output of the transformer B. The utility model uses few components to reduce cost and increase reliability. Control circuits are all concentrated and installed in a box, and three conducting wires are installed at the different depths of a water tower. The automatic controller for water lever has the advantages of convenient installation and maintenance and secure use.

Description

Automatic controllor for water lever

The utility model relates to a kind of fluid level control device, especially for the device of the automatic control water level height of water tower.

Existing fluid level controller is of a great variety, is used for the water tower level automatic controlling apparatus for height and still adopts the ball valve or the also sub floating vast expense of water mostly, and this device is installed and the maintenance inconvenience, and hinders hygienic requirements.It is level switch that the automatic control of liquid device that CN2081548, CN2105715 propose respectively adopts high low position electrode, makes the installation and maintenance of control device more convenient, but its control circuit more complicated is easily affected by environment, and cost is also than higher.

The purpose of this utility model is a kind of simple control circuit of design, the automatic controller for water level cost is hanged down be easy to install and maintain.

Design proposal of the present utility model is: automatic controller for water level, it is made up of testing circuit, control circuit and power circuit, it is characterized in that control circuit comprises transformer B ₁And be connected to transformer B ₁The rectifier of a secondary end and D ₁, D ₂Be connected to rectifier D ₁, D ₂The relay J of output terminal ₁And J ₂, testing circuit comprises and is connected on rectifier D ₁, D ₂Another output terminal T ₁, T ₂And transformer B ₁Secondary another output terminal T ₃

The advantage of such scheme is that testing circuit and control circuit all adopt very little components and parts, increases reliability and has reduced cost, and is easy for installation, only needs to adorn 3 leads in water tower and gets final product, and control circuit all concentrates in the safety box, keeps in repair easy.

Fig. 1 implements circuit diagram for the utility model.

Below in conjunction with accompanying drawing the structure of the present utility model and the course of work are described.

KM is an A.C. contactor, one group contact KM ₁With switch S B ₁Parallel connection, another organizes contact KM ₂Be connected to the three-phase electricity input end of motor M.Step-down transformer B ₁In order to provide 36V following supply voltage, D ₁, D ₂Be single-phase bridge rectifier, relay J ₁And J ₂All adopt 121 type high sensitive relays.Present embodiment adopts 2 groups of rectifier bridge D ₁And D ₂, rectifier bridge D ₁And D ₂Be connected to transformer B ₁A secondary end, transformer B ₁The secondary other end is the lead T that is connected to the water tower bottom ₃, D ₁And D ₂One output terminal is succeeded electrical equipment J respectively ₁And J ₂, rectifier bridge D ₁Another brings out termination lead T ₁, T ₁With T ₃As the peak level detecting device, rectifier bridge D ₂Another output termination lead T ₂, T ₂With T ₃As lowest water level detecting device, relay J ₁One group of contact J _1-1Be series at pushbutton switch SB ₁And between the A.C. contactor KM, relay J ₂One group of contact J _2-1With pushbutton switch SB ₁And KM ₁Parallel connection is with relay J ₁One group of contact J _1-1Series connection.

When switch QS was closed, main circuit power was connected, and KM gets electric, at J _1-1When closed, contact KM ₁And KM ₂Closure, motor M energising running, water tower discharges water, and works as T ₁When not had by water logging, T ₁With T ₃Energising, J at this moment ₁Conducting makes normally closed contact J _1-1Disconnect KM dead electricity, contact KM ₂Disconnect motor M outage stall, J at this moment _2-1Also in like manner disconnect, when decline of water table to T ₂When following, transformer B ₁Secondary no current passes through, J ₁And J ₂Outage makes normally closed contact J _1-1And J _2-1Discharge closure, KM gets electric, makes KM ₁And KM ₂Contact adhesive, motor get electric water pump and draw water, and water level rises, when water level rises to T ₂Above the horizon the time, relay J ₂Get electric J _2-1The contact disconnects, but because KM ₁The still closed self-locking in contact makes KM ₂Still closed, motor remains in operation, to waterline at T ₁On the time, relay J ₁Get electric J _1-1The contact disconnects, motor stall this moment, and water pump stops pumping, and so circulation keeps water tower level constant.

Claims

1, automatic controller for water level, it is made up of testing circuit, control circuit, power circuit and pump motor, it is characterized in that control circuit comprises transformer B ₁And be connected to transformer B ₁The rectifier D of a secondary end ₁, D ₂Be connected to rectifier D ₁, D ₂The relay J of output terminal ₁And J ₂, testing circuit comprises and is connected to rectifier D ₁, D ₂Another goes out to hold T ₁, T ₂And transformer B ₁Secondary another output terminal T ₃

2, automatic controller for water level according to claim 1 is characterized in that the relay J on the control circuit ₁And J ₂Normally closed contact J _1-1And J _2-1Series connection, and J _2-1With KM ₁In parallel.