CN1073273A - A kind of digital control leakage-proof multi-way valve - Google Patents

Abstract

A kind of digital control leakage-proof multi-way valve, during it was applicable to the liquid multi pass acquisition or distributes, as oil field oil exploitation test satellite location etc., it was by the common valve of being made up of spool.It is characterized in that: be fixed with the location code-disc on poppet shaft, in housing and code-disc corresponding position, location position transducer be housed, spool links to each other with numerical control deceleration servo unit and has Programmable Logic Controller to link to each other with position transducer with numerical control deceleration servo unit.Owing to adopt location code-disc and position transducer accurately to determine the spool corner position, can prevent the drift error of common multiport valve and the string that produces leaks, the location is accurately.

Description

A kind of digital control leakage-proof multi-way valve

A kind of digital control leakage-proof multi-way valve is during it is applicable to the liquid multi pass acquisition or distributes, as oil field oil exploitation test satellite location etc.

In oilfield exploitation, need measure, measure the manufacturing parameter of oil well, as the parameter of oil offtake, water cut, gas production rate etc.But, because the test satellite location device therefor is more, can not be equipped with a test satellite location by each mouthful oil well, but many mouthfuls of shared test satellite locations of oil well, this just need deliver to test satellite location to the output of the tested oil well of each mouthful by pipeline, make test satellite location at different time and different oil well gatings with multiport valve, it is measured.Because present multiport valve in use for some time, the spool setting accuracy reduces, and makes multiport valve produce string and leaks, and has influenced the measuring accuracy of oil well greatly.The reason that string leaks mainly is that spool and liquid inlet location are forbidden to cause.This a string leakage problem causes existing test satellite location to change back the form of controlling with the valve group again, has increased volume and operation element amount.

The objective of the invention is to invent a kind of digital control leakage-proof multi-way valve, it uses numerical control operating, accurate positioning, and the leakage-proof phenomenon, easy to operate.

The present invention as shown in Figure 1, it has housing 1, spool 2, several oil well inlets 3, metering outlet 4, gathers outlet 5, it is characterized in that: on 2 of spools, be fixed with location code-disc 6, corresponding to code-disc 6 positions, location position transducer 7 is housed at housing 1, outside housing 1, be connected with numerical control deceleration servo unit 8, the Programmable Logic Controller 9 that input end links to each other with position transducer 7, output terminal links to each other with numerical control deceleration servo unit 8 is arranged with spool 2.

In the present invention, use numerical control deceleration servo unit 8 to drive spool 2 actions.The structure of spool 2 and housing 1 is the same with common multi-way valve structure, also be angle position by different spools lead the respectively metering outlet 4 and gather outlet 5(and have only an inlet to import metering outlet 4 of the feed liquor of each inlet 3, other all importings gather outlet 5).The present invention also is fixed with location code-disc 6 on spool 2, for code-disc 6 positions, location position transducer 7 is housed at housing 1, and it can accept to locate the angular signal of code-disc 6.Because the output of position transducer 7 is connected to the input end of Programmable Logic Controller 9, when receiving the positioning signal of position transducer 7, control numerical control deceleration servo unit 8 stops, thereby realizes accurately location.Numerical control deceleration servo unit 8 can realize driving spool 2 forward and reverse rotating to an angle under the control of Programmable Logic Controller 9.

The present invention is owing to use numerical control deceleration servo unit to drive valve core rotation, location code-disc and corresponding with it position transducer are housed on spool, determine the angle position of spool by location code-disc and position transducer, by Programmable Logic Controller it is monitored again, can prevent that the string that the drift error after common multiport valve is owing to use a period of time between spool position and the indicator produces from leaking, position control is accurate.Simultaneously,, can be used as the part at digital control meter station, need not people's intervention owing to use Programmable Logic Controller to control.

Among the present invention, numerical control deceleration servo unit 8 can be CN91103795 " a kind of numerically controlled differential reducing electric servo system " as number of patent application, and standard industrial control in this servo unit and central control computer can be substituted by the Programmable Logic Controller among the present invention.The present invention also can use number of patent application to do numerical control deceleration servo unit 8 as CN91104884 " a kind of small modular numerically controlled execution power unit ", and is simple in structure.Numerical control deceleration servo unit 8 of the present invention can also use the structure that is combined with common speed reduction unit by the numerical control electric machine, the numerical control electric machine can use as " a kind of fully electric controlled high power executive device " of the patent No. as CN89213615, and speed reduction unit can use common worm type of reduction gearing, differential speed reducer or harmonic speed reducer.

In the present invention, location code-disc 6 and position transducer 7 can use contactless, to improve reliability.Position transducer 7 can use the combination of light-emitting component and light activated element, and code-disc 6 outer rim relative position places are fixed with corresponding refractive body in the location.When spool 2 and location code-disc 6 turn to orientation angle together, when making metering outlet slot on the spool 2 aim at some inlets, light activated element receives the light that light-emitting component sends, and outputs signal to Programmable Logic Controller 9, as the input quantity of control numerical control deceleration servo unit 8 motions.The refractive body of location on the code-disc 6 can embed, also can be to scribble reflectorized material or privileged site is polished locating code-disc 6 outer rims.In the present invention, position transducer 7 also can use the magnetic Hall element, and code-disc 6 outer rim relative position places are fixed with corresponding magnet in the location, uses Hall element to make magnetic switch, and is the same with light activated element, received by Programmable Logic Controller 9.In the present invention, position transducer 7 can also be a pair of infrared light-emitting component and infrared optical sensor, can prevent the maloperation that visible light causes.

Position transducer of the present invention can have a plurality of, whether not only can detect location code-disc 6 and spool 2 puts in place, can also obtain valve position information, as can two registration refractive body or magnets axially being set at the location code-disc, two position transducers of relative set on housing, wherein a registration refractive body or magnet only just have when No. 1 inlet of spool correspondence, can have or not to judge whether it is to be positioned inlet No. 1 by what the position transducer of correspondence was exported.Other inlet numbering is determined by the Programmable Logic Controller counting.The present invention can also be by being provided with more than two position transducers, so that more a plurality of, relative set three rows, four rows, five rows are so that more row's refractive bodies or magnet as three, four, five.Refractive body or magnet are encoded corresponding to number number of spool gating inlet, by the information that obtains gating feed liquor slogan that has or not of each position sensor signal.The present invention also can be arranged in a plurality of position transducers radially, refractive body or magnet on the code-disc of location have only a row, place, each corresponding spool location has a plurality of refractive bodies or magnet corresponding with position transducer, by the coding that has or not of refractive body or magnet, obtain the information of the corresponding inlet numbering of spool.

Claims (1)

1, a kind of digital control leakage-proof multi-way valve, it has housing 1, spool 2, several oil well inlets 3, metering outlet 4, gathers outlet 5, it is characterized in that: on 2 of spools, be fixed with location code-disc 6, corresponding to code-disc 6 positions, location position transducer 7 is housed at housing 1, outside housing 1, be connected with numerical control deceleration servo unit 8, the Programmable Logic Controller 9 that input end links to each other with position transducer 7, output terminal links to each other with numerical control deceleration servo unit 8 is arranged with spool 2.

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