CN2504825Y

CN2504825Y - Dynamo multifunctional energy saving control case of pumping unit

Info

Publication number: CN2504825Y
Application number: CN 01250495
Authority: CN
Inventors: 连才; 李向春
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-08-30
Filing date: 2001-08-30
Publication date: 2002-08-07
Anticipated expiration: 2011-08-30

Abstract

The utility model relates to a multifunctional electricity-saving control case of a dynamo of a pumping unit, which can avoid the phenomenon that the dynamo is burnt out while in use in northern areas in winter. The utility model has the advantages of good electricity-saving effect and complete protection function. The utility model comprises a box body, a soleplate and a controlling circuit. The back of an air circuit breaker ZK is connected with a bidirectional thyristor electricity-saving device ZC in series. The back of the bidirectional thyristor electricity-saving device ZC is connected with a thermal relay RJ and a dynamo D. The thermal relay RJ is also connected with a capacitance group which is connected in a delta connection mode. An alternating current contactor CJ is connected between the thermal relay RJ and the bidirectional thyristor electricity-saving device ZC. The utility model is especially suitable for controlling the dynamo of the pumping unit of the oil field.

Description

Pumping-unit motor multifunctional power saving control cabinet

Technical field:

The utility model relates to the electric machines control technology field, and exactly it is a kind of pumping-unit motor multifunctional power saving control cabinet.

Background technology:

The control method of pumping-unit motor has a variety of, but existing control method when northern area uses the burn-down of electric motor phenomenon easily takes place winter, and in a single day motor burns will influence the output of crude oil, brings bigger economic loss.Existing " Y-Δ " conversion and control case, power supply can not be adjustable continuously, and it is little to be suitable for the load variations scope, power savings is not obvious, and " Y-Δ " conversion and control case power supply neither be adjustable continuously, can only drop to the 280V shelves from 380V, the load variations scope that is suitable for is few, and power savings is general; The power savings of Frequency Converter Control case is better, but cost is higher, is not easy to large-scale popularization and uses.

Summary of the invention:

The utility model is to use the problem of easily burning motor winter in order to solve existing pumping-unit motor control cabinet at northern area, provides a kind of power savings good, the pumping-unit motor multifunctional power saving control cabinet that defencive function is many.It comprises casing, base plate and control circuit, it is characterized in that: serial connection bidirectional triode thyristor electricity-saving appliance ZC behind the air circuit ZK, connect thermal relay RJ and motor D behind the bidirectional triode thyristor electricity-saving appliance ZC, and thermal relay RJ also is connected with the capacitance group of delta connection.Also be connected with A.C. contactor CJ between thermal relay RJ and the bidirectional triode thyristor electricity-saving appliance ZC.Also be connected with current transformer JH between air circuit ZK and the bidirectional triode thyristor electricity-saving appliance ZC.

The utility model can prevent effectively that the phenomenon that the northern area pumping-unit motor burns from taking place; prolonged the useful life of motor; and has good electricity-saving effect; also have defencive functions such as short circuit, overload, the phase failure; voltage connects adjustable; the load variations scope that is suitable for is big, can soft start, and vibrations and noise are all lower during operation.

Description of drawings:

Fig. 1 is the utility model circuit connection diagram.

Fig. 2 is the utility model circuit theory diagrams.

Specific implementation method:

High-quality low temperature appliance component note is adopted in the equal outsourcing of electric elements of the present utility model, gets all the ready shown in the accompanying drawing behind the parts, be welded on the base plate with reference to accompanying drawing, note not causing rosin joint, the casing in the utility model can be made of metal, also can be made of plastic.During use, the air switch ZK that closes, ZC is charged for the bidirectional triode thyristor electricity-saving appliance, at this moment if press start button SB, then A.C. contactor CJ adhesive, thermal relay RJ is charged, and motor D starts running, and capacitor C puts into operation.Bidirectional triode thyristor electricity-saving appliance ZC major component is the bidirectional triode thyristor device, it can be according to the variation of pump load, automatically detect the power supply and the electric current of output, automatically regulate output voltage, make the output voltage of bidirectional triode thyristor electricity-saving appliance ZC low when load is light, height when load is heavy, and output current is constant relatively.Changed in the past that the oil pumper control cabinet is added on this fact of voltage constant on the motor D, therefore, in the saving electric energy.The capacitor group that capacitor CX forms can be carried out local compensation to the reactive power of pumping-unit motor D, reduces total current, reduces the low-voltage distributing line via net loss, saves electric energy.Air switch ZK and thermal relay RJ are the appliance component that is suitable for work under the low temperature, can still play a good protection to motor at low temperatures.Air switch ZK plays short circuit and overload protective function, and when motor or line short, or motor overload surpasses the permission time and advance, and air switch ZK tripping operation is cut off the electricity supply, and plays a protective role.Thermal relay RJ has the differential line winding, and motor is played the open phase protection effect.Current transformer LH is used to measure motor one phase running current.The appliance component that this control cabinet adopts is the high-quality appliance component, and 20 years non-maintaining, and the operating maintenance expense is low.Bidirectional triode thyristor electricity-saving appliance ZC raises by zero to voltage gradually at electric motor starting, thereby has soft start function, and former pumping-unit motor D is full voltage starting, and starting current is big, is 7 times of motor D rated current.When being moved by bidirectional triode thyristor electricity-saving appliance ZC, the voltage ratio rated voltage of output is low, so motor D when operation vibrations are little, noise is also low.

Claims

1, pumping-unit motor multifunctional power saving control cabinet, it comprises casing, base plate and control circuit, it is characterized in that: serial connection bidirectional triode thyristor electricity-saving appliance ZC behind the air circuit ZK, connect thermal relay RJ and motor D behind the bidirectional triode thyristor electricity-saving appliance ZC, thermal relay RJ also is connected with the capacitance group of delta connection.

2, according to the described a kind of pumping-unit motor multifunctional power saving control cabinet of claim 1, it is characterized in that: also be connected with A.C. contactor CJ between thermal relay RJ and the bidirectional triode thyristor electricity-saving appliance ZC.

3, according to the described a kind of pumping-unit motor multifunctional power saving control cabinet of claim 1, it is characterized in that: also be connected with current transformer JH between air circuit ZK and the bidirectional triode thyristor electricity-saving appliance ZC.