CN2473363Y

CN2473363Y - Automatic control box for water pump

Info

Publication number: CN2473363Y
Application number: CN 00225937
Authority: CN
Inventors: 黄运辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-11-08
Filing date: 2000-11-08
Publication date: 2002-01-23
Anticipated expiration: 2010-11-08

Abstract

The utility model discloses a water pump automatic control box which controls the work of the electric machine by a pipe network water pressure change electrical signal which is obtained through an electro connecting pressure gauge or a pressure relay KP arranged at the water supply pipe network of the pump and the relays K1, K2 and K3 in the middle. The pressure top, middle and lower limit values of the electro connecting pressure gauge or the pressure relay and the time delay starting time of the time relay KT1 and KT2 are capable of being adjusted on the spot according to the requirement. The utility model has the advantages of safe and reliable, easy fixing and maintenance, convenient management; in addition, saving water, electricity and labor, etc. The utility model is suitable for the automatic controls of centrifugal pump, under water pump, borehole pump, inline pump and circulating pump.

Description

The water pump automatic control box

The utility model relates to the control gear of equipment for liquid transportation, particularly the water pump automatic control box.

Water tower water pump automatic controller in prior art is to be provided with between power supply and pump motor by a low-voltage dc power supply and the height water-level detecting and control circuit such as the CN2133614Y that adopt four electronic control circuits of putting element such as integrated package to form, and its circuit is complexity.

The purpose of this utility model is to provide a kind of water pump automatic control box of the pump motor power control circuit of being made up of elements such as pressure gauge with electric contact or pressure relay, auxiliary reclay, the time relay, A.C. contactors.

The utility model is to realize as follows: survey pipe network water pressure size and situation of change and change electrical signal into by the pressure relay system or the pressure gauge with electric contact that are installed on the water pump water supply network; through auxiliary reclay, time relay action; A.C. contactor is connected or disjunction pump motor power supply, reached the automatic control purpose that motor turns round or shuts down automatically.

The utility model is compared with the prior art product and is had following characteristics and advantage: 1, only need with pressure gauge with electric contact or other relay system, change water pump water supply network pressure size variation situation into electrical signal, thus automatically controlled water pump safe operation under normal water level and hydraulic pressure; 2, whole electrical control parts all are fixed in the machine side, and need not only needs connect input output with lead toward water tower, the well cable that installs electric wiring, and water pump can put into operation, auto-manual switches arbitrarily, from water; 3, simple in structure, installation and maintenance are easy, convenient management, and energy-saving and water-saving is saved manpower.

Accompanying drawing newly is described in detail as follows this practicality in conjunction with the embodiments.

Accompanying drawing is the utility model electrical schematic diagram.

Components and parts explanation among the figure: M---pump motor, KM---A.C. contactor, QF---circuit breaker, SA---turn round sub-switch, KT---time relay, K---auxiliary reclay, QA---starting button, TA---stop button, RJ---fus, KP---pressure relay, HL---tutorial light.Hydraulic pressure upper, middle and lower limit value point is represented in upper, middle and lower.

Referring to accompanying drawing, automatic control circuit of the present utility model is mainly by pressure relay KP or pressure gauge with electric contact, auxiliary reclay K ₁, K ₂, K ₃, time relay KT ₁, KT ₂Form auxiliary reclay K with A.C. contactor KM ₁, K ₃Accept electrical signal respectively, when middle relay K from water pump water supply network low pressure limit value, CLV ceiling limit value ₁Or K ₃During conducting, the energising of A.C. contactor KM normally-closed contact disconnects, and cuts off the electricity supply, and water pump is shut down, K ₂Accept limit value electrical signal in the water pump water supply network and conducting, by KT ₂Delayed startup, the KM band is opened make contact makes the electric motor starting pump working.Taken out when full when the water of water tower or pond or water tank, the float valve on the intake pipe is closed automatically, and the hydraulic pressure on the water pump water supply network increases, the conducting of the pressure relay upper limit, auxiliary reclay K ₃Action, A.C. contactor KM disconnects, and water pump is shut down, and limits conducting, auxiliary reclay K when ductwork pressure is reduced among the certain numerical value pressure relay KP ₂Conducting, the starting pump working; Taken out when reducing to lowest water level when the water in well or pond, pump water inlet or bottom valve begin air inlet, and the water pump water inlet reduces ductwork pressure and reduces pressure relay KP decline conducting, auxiliary reclay K ₁Action, water pump is shut down, and goes round and begins again like this, and the guarantee water pump is worked under normal water level, hydraulic pressure situation.The utility model is installed in the water pump machine room, and it is turned round on sub-switch S A, starting button QA, stop button YA, the external Qianmen of the equal install bin of tutorial light HL, and all the other components and parts are installed in the casing, connect by flexible cord.

Claims

1, a kind of water pump automatic control box is made up of casing and control circuit, and control circuit is turned round sub-switch S A, starting button QA, stop button TA, tutorial light HL are placed on the relevant position, casing Qianmen, all the other components and parts, be installed on the casing inner panel, connect by lead, the automatic control circuit primary component is pressure relay KP, auxiliary reclay K, time relay KT is characterized in that transmitting the auxiliary reclay K of pipe network water pressure upper, middle and lower limit value electrical signal ₃, K ₂, K ₁The one end links to each other k with three contacts of pressure cut-off device ₃, k ₁The other end respectively with time relay KT ₁Be connected auxiliary reclay K with the normally closed interlock of A.C. contactor KM ₂The other end and KT ₂Link to each other with the normally open contact of KM.

2, a kind of water pump automatic control box as claimed in claim 1 is characterized in that being provided with in the control circuit pressure gauge with electric contact.