CN1071354A

CN1071354A - Numerically controlled slurry screen

Info

Publication number: CN1071354A
Application number: CN 91109271
Authority: CN
Inventors: 石行
Original assignee: Xicheng Xinkai General Testing Factory Beijing City
Current assignee: Xicheng Xinkai General Testing Factory Beijing City
Priority date: 1991-10-09
Filing date: 1991-10-09
Publication date: 1993-04-28

Abstract

A kind of numerically controlled slurry screen is made of screen cloth and vibrating device thereof and oscillation drive.Be characterized in substituting the mechanical actuation device of forming by traditional motor, reduction box and camshaft with numerical control power electronic device and drive circuit that power rectifier, controlled power pulser and transducer three form, device structure is greatly simplified, there are not machine driving and consequent wearing and tearing, the device working stability is reliable, energy consumption significantly reduces, and can include mud shaker in the electromechanical integration control system of oil drilling in whereby.

Description

Numerically controlled slurry screen

The present invention relates to a kind of nonpetroleum industrial machinery equipment-numerically controlled slurry screen of electromechanical integration.It is used for the work production scene of industries such as oil, geology.

In the oil field, the exploration in mine, digging operation scene, be attended by rock, clod and other foreign material that all size does not wait in a large amount of mud that gush in the subterranean well process, emitting, could it be transported at a distance by slush pump after must removing these foreign material totally, to guarantee carrying out production strictly in line with rules and regulations of drilling operation field.Mud shaker is exactly the equipment that is used to purify mud, removes the drilling cuttings foreign material.Present mud shaker all is that employing is mechanically operated: after utilizing the numerous and jumbled reduction gear box of motor-driven structure, drive the rotating shaft rotation that eccentric cam is housed, make this cam produce the oscillating component work that motive force drives mud shaker at the screen cloth direction of vibration.This mechanism driving device, complex structure, the equipment manufacturing cost height, power source and transmission device all should be installed near the vibration screen nearby, and the huge vibrations of large type drill and mud shaker and thundering make its condition of work extremely abominable, driving parts weares and teares easily, service life is short, and energy consumes height, the operating mode that can't regulate its vibration at random.

The numerical control mud vibrating screen that the purpose of this invention is to provide a kind of electromechanical integration.

The present invention is achieved in that it is made of screen cloth and vibrating device thereof and oscillation drive two parts, the present invention mainly is improved to by power rectifier its drive unit, form with controlled power pulser and transducer three parts that the controlled pulse generation circuit of making solid-state module and high-power electronic switch circuit constitute, it is neighbouring near in the metallic shield box of power supply that wherein power rectifier and controlled power pulser are installed in the well site, and transducer then is installed in the below of screen cloth vibrating base motion part of the force.

The present invention utilizes the swift and violent and Power Electronic Technique of practicability day by day of contemporary development, drive the screen cloth vibration with the circuit of numerical control output pulses electronic circuit, driving device motion and related device thereof, mechanically operated prime mover and transmission device have thoroughly been save thus, structure is simplified greatly, the device fabrication expense is greatly reduced, also because of not having machine driving and consequent wearing and tearing, make the device reliable and stable work, bottom line is also reduced in the maintenance work of equipment.The present invention uses the efficient low-consume technology of electromechanical integration, and dutycycle and the frequency that can regulate driving pulse easily make it to reach synchronous resonant with the mechanical oscillation of equipment, thereby the energy consumption of device is significantly reduced and is in operation operation under the optimum condition.

Fig. 1 is an oscillation drive fundamental diagram of the present invention.

Fig. 2 be the electrical schematic diagram (A) of controlled power pulser in the drive unit and structure chart (B) (C).

Fig. 3 is one embodiment of the present of invention external form sketch.

Operation principle of the present invention is: the two ends (referring to Fig. 2) that AC power (three-phase 380V or single-phase 220V) are added to a high-power numerical control pulsed electron generator 3 that is made of controlled pulse generation circuit 5 and high-power electronic switch circuit 6 after the rectifier that rectifier bridge assembly 1 and filter capacitor 2 constitutes converts direct current to, produce powerful controlled pulse electric current thus, just this energy has been converted into the vibratory drive energy of mud shaker through electromagnetic transducer 4 again.Regulate the pulse frequency of power electronic circuit output and the vibration operating mode that amplitude just can be adjusted mud shaker, it is under the optimization operating mode works.In fact, the present invention is a transplanting invention, promptly the high-power numerical control pressure regulation converter plant that has developed at present comparative maturity is used for substituting the mechanical driving part of traditional mud shaker, thereby make this equipment also enter the electric drive technology field of electromechanical integration, for the technological transformation and the update of equipment are made contributions.

The present invention does high power switch with the VMOS pipe.Because the turn-on and turn-off of VMOS pipe depend on grid potential fully, and the response speed height, conducting is convenient with shutoff.Moreover the input impedance of VMOS pipe is high, when promptly using hundreds of pipes in parallel, also can promote its work with a simple drive circuit; And output impedance is positive resistance characteristic and has positive temperature coefficient, as after using several VMOS pipe parallel connections, electric current can be evenly distributed to each pipe by this pipe performance decision, so just can reach the required big control power of equipment by a plurality of VMOS pipes of parallel connection, and the number by selecting pipe in parallel just obtains different rated power easily, makes it to be made into series with the mud shaker mechanical part.Referring to Fig. 2, controlled large power pulse switch circuit 6 is to form with a plurality of VMOS high-power FETs among the present invention, the source of these VMOS pipes all is parallel to source plates 7, the leakage of all VMOS pipes also is parallel to drain electrode plate 8, this two-plate is clamped in the VMOS pipe middle and good thermo-contact is arranged, the source of each VMOS pipe and a grid difference resistance R 1 in parallel, the grid of each pipe links to each other with the output control terminal of controlled pulse generation circuit 5 by resistance R 2 of series connection respectively simultaneously.Fig. 2 (B) (C) has shown the fixed structure of this circuit.

Controlled pulse generation circuit 5 among the present invention can be to add the multivibrator that the capacitance-resistance feedback constitutes with integrated circuit, also can simulate it by the various pulse digital signals that computer is directly exported different frequency and different duty, so more can reach the operating mode of direct numerical control mud shaker, and at random adjusting the final production purpose, thereby mud shaker is also included in the control system of field produces electromechanical integration.

Transducer is contained in the stressed below of screen cloth base, and transducer can be common electromagnet, and armature wherein can adopt rare earth permanent-magnetic material to make, and because of its magnetic energy product density is big, result of use is better.Pulse current comes to electromagnet coil, attracts armature to move during energising downwards, and vibration screen also moves downward thereupon; During the coil power down, then the stage clip in four jiaos in vibratory sieve recovers under the elastic force effect, and screen cloth is action upwards, and so reciprocal linearly operating up and down of cycle just makes screen cloth not stop to vibrate back and forth up and down.Rectifier and power pulser are to be made of electronic device basically, can be contained in to be placed in working environment in the metallic shield box preferably near the place of power supply, make operation field more succinct spacious.

The product that the present invention tests enforcement is the 222S-871 straight-line oscillation mud shaker that Baoji Petroleum Machinery Factory produces, change into power electronic driver part of the present invention to former mechanical actuation device removal and below screen cloth, load onto transducer just passable, the former outfit drive motors of this machine power is that 4*3KW(adopts Dual-motors Driving), improving the back power consumption only is that energy consumption greatly reduces about 2KW; Consumable accessory almost reduces to zero, and Operation and Maintenance is also very easy, and still can keep the original equipment vibratory sieve to be straight-line oscillation up and down, the screening efficiency height, and compass screen surface is salubrious, is convenient to the driller and cleans many advantages such as compass screen surface.

Claims

1, a kind of numerically controlled slurry screen, it is made of screen cloth and vibrating device thereof and vibration driving device two parts, it is characterized in that oscillation drive is by power rectifier, constitutes with having made the controlled pulse generation circuit of solid-state module and controlled power pulser and transducer three parts that the high-power electronic switch circuit constitutes, wherein power rectifier and controlled power pulser lean in the metallic shield box of power supply near being installed in the well site, and transducer then is installed in the below of screen cloth vibrating base motion part of the force.

2, numerically controlled slurry screen as claimed in claim 1, it is characterized in that wherein the high-power electronic switch circuit can be formed with the VMOS high-power FET of a plurality of parallel connections, the leakage that the source of all VMOS pipes is parallel to source plates and all VMOS pipe also is parallel to the drain electrode plate, this two-plate is clamped in the VMOS pipe middle and good thermo-contact is arranged, a resistance R 1 in parallel respectively between the source of each VMOS pipe and the grid, the grid of each VMOS pipe links to each other with control circuit by the resistance R 2 of connecting respectively simultaneously.

3, numerically controlled slurry screen as claimed in claim 1 is characterized in that transducer can be an electromagnet, and armature wherein can adopt rare earth permanent-magnetic material to make.