CN87203295U - Supersonic monitoring device of pipeline-cleaning unit - Google Patents

Abstract

The utility model discloses a supersonic monitoring device of pipeline-cleaning device, comprising a transmitting part and a receiving part. The character that the ultrasonic energy has different losses (being absorbed) in different mediums is applied. Signals output through different monitoring objects are judged by detecting waves, being amplified, and delaying and filtering interference circuits to display, alarm and record. The supersonic monitoring device of a pipeline-cleaning device is a non-contact monitoring device. The utility model has the advantages of simple structure, convenient operation, high reliability, high durability, and accuracy, and the utility model can display in the scene, and distance transmission can be carried out. The utility model in particular suitable to monitoring cleaning devices in oil delivery pipe-line.

Description

Supersonic monitoring device of pipeline-cleaning unit

A kind of channel washer, the monitoring device of petroleum transportation pipeline washer particularly.

In the existing petroleum transportation pipeline of China,, accumulate over a long period, pipeline is narrowed down, even stop up, influence the normal conveying of oil because tube wall is hung wax.Therefore, need be in oil pipeline, discharge washer (being commonly called as transmitting-receiving ball or spherical pig) termly, to remove the extension wax on the tube wall, guarantee the normal conveying of oil, behind the dispensing washer, need be in the certain location, for example at the naked pipe place of pressurizing point, whether pass through with measurer device monitoring rabbit, and can determine washer when, where discharge and extract.

Before the utility model was made, the monitoring device of rabbit was by external introduction " mechanical contact-type spherical pig alarm ".It is made up of contact, lever system and warning system.Use this device, need perforate on the assigned position of oil pipeline, contact and lever system are placed pipeline.When rabbit comes temporarily, the collision contact affects lever system and is reported to the police by warning system after it amplifies.But in long-term use, because the block that moves about, for example You Li wax stone in case collision also can cause warning on contact, forms " wrong report ".Sometimes, when rotating wash bowl passes through,, the steel wire in the lever system is broken because the wax amount of removing is more.In addition, when this alarm is installed, perhaps stop oil transportation, perhaps band is pressed on the pipeline and punches, and the assembling difficulty influences normal oil transportation work; Tapping on the oil pipeline often forms a seepage trouble spot again.

In order to eliminate the drawback that " mechanical contact-type spherical pig alarm " brings, task of the present utility model, be to seek a kind of non-contact, do not need on pipeline, to punch, just can on the optional position of pipeline, predict the monitoring device whether rabbit passes through.

Task of the present utility model is to adopt the ultrasonic monitor device that is developed into based on the principle of acoustic energy variation to realize.It is by inputing to a kind of electric impulse signal of ultrasonic transducer in this device, make it send the ultrasound wave of certain frequency, by being transmitted into receiving end behind the detected medium, the medium that passes through in the pipeline (oil, paraffin or washer) difference, after the transducer that the absorbed difference of acoustic energy, the signal of this variation are received end receives, again through selection, the judgement of multi-level pmultistage circuit, make it to export accurate, an errorless alerting signal, and can carry out field notes.This device is a kind of contactless rabbit monitoring device, both can indicate on the spot, also can long-distance transmissions.

This device is made up of transmitter unit and receiving element two large divisions.Transmitter unit is made up of oscillatory circuit, radiating circuit and transmitting transducer.Receiving element is made up of receiving transducer, tuned circuit, detecting circuit, amplifying circuit, monostable circuit, delay filter interfered circuit, display output circuit.It is characterized in that: adopted the circuit that can make the switch triode reverse-conducting on a, the radiating circuit; Adopted on b, the receiving circuit and postponed the filter interfered circuit; Adopted switch triode on c, the display output circuit.

On the monitoring device that the utility model is recommended red, green two kinds of signal lamps and alarm are installed.Green light is bright, the normal condition that the expression petroleum streams is crossed; Red, green light extinguishes simultaneously, and the wax part that front end was removed and accumulated in to the expression rabbit has arrived the monitoring point of appointment; Red, green light is bright entirely, expression rabbit moment passes through, red light general glittering 3～5 seconds, alarm equipment alarm.Then, green light is bright, begins normal oil transportation work again.Therefore, this monitoring device can have the indication oil by, wax stone by and three kinds of functions passing through of washer, and give record.

The utlity model has and install simply, easy to maintenance, can monitor in any given position, and have reliable, durable, accurately reach advantages such as function is many, avoid and overcome the drawback that the direct contact type monitoring instrument is brought.It is specially adapted in the monitoring of washer in the petroleum transportation pipeline applicable on any liquid conducting pipes.

Below in conjunction with accompanying drawing, the structure and the course of work of the device that the utility model is recommended are described in detail again.

Fig. 1 is the structure calcspar of this device.

Fig. 2 is the power circuit diagram of this device.

Fig. 3 is the oscillatory circuit figure in the transmitter unit of this device.

Fig. 4 is tuning, detection, amplification and the monostable circuit figure of this device.

Fig. 5 is the delay filter interfered circuit figure of this device.

Fig. 6 is the display output circuit figure of this device.

After represented power circuit rectification is boosted among process Fig. 2, the supply voltage that obtains 500 volts of direct currents is added on the represented radiating circuit of Fig. 3, by resistance R on the radiating circuit ₄And capacitor C ₃Mutual coupling.As switch triode BG ₂Emitter potential can make its " snowslide " time, BG ₂Be in conducting; When emitter potential not enough so that when its " snowslide ", BG ₂End.Work as BG ₂During conducting, there is pulse signal to add to controllable silicon BG ₁The control utmost point, BG ₁Conducting; There is not this pulse signal, BG ₁End, go round and begin again, offer transmitting transducer T ₁An oscillator signal makes it produce the ultrasonic signal of 0.5～1.25 megahertz.On radiating circuit by switch triode BG ₂, resistance R ₄And capacitor C ₃Form the reverse-conducting circuit, R ₄With C ₃Series connection is connected to BG in its junction ₂Emitter.Resistance R ₄Elect 80～120 ohm as, capacitor C ₃Elect 0.01～0.047 microfarad as.Both are matched to 1～4 millisecond time constant mutually, and preferential time constant of recommending is 2 milliseconds in the utility model, to make full use of switch triode BG ₂The reverse-conducting characteristic.

By transmitting transducer T ₁The ultrasound wave of launching is through behind the detected medium, by receiving transducer T ₂Receive.Transducer T ₂The acoustic energy that receives can be transformed into electric energy; under the normal condition (oil transportation); its output voltage is 0.2～0.4 volt; (come interim) under the unusual condition when hanging wax stone or washer; its output voltage is 0～0.005 volt; normal or the abnormal signal that is received is introduced signal delay filter interfered circuit and display output circuit shown in Figure 6 shown in Figure 5 after being fed into tuning, detection shown in Figure 4, amplification and monostable circuit again, realizes that signal shows, record and reporting to the police.It is characterized in that: 1. filter on the interfered circuit resistance R in delay shown in Figure 5 ₂₅Elect 100～500 ohm as, what preferentially recommend is 240 ohm; Capacitor C ₁₈Elect 50～120 microfarads as, what preferentially recommend is 100 microfarads.R ₂₅And C ₁₈After the coupling, can make signal realize that time-delay keeps mutually.When the extension wax thing that this device is gathered at the washer front end arrives, and do not make red light bright, do not report to the police also record not.2. in display output circuit shown in Figure 6, switching transistor is selected switching diode D for use ₁₀With switch triode BG ₇, both mate, and can measure and write down the length of wax post exactly, to realize the multiple use of this monitoring device.

Described each Circuits System of this device all can be installed in the portable square chest, can carry.

Self-evident, if petroleum transportation pipeline stops up, also available device monitored.

Claims (4)

1, a kind of channel washer, the monitoring device of petroleum transportation pipeline washer particularly, it by radiating circuit, transmit and receive transducer, tuned circuit, detecting circuit, amplifying circuit, monostable circuit, delay filter interfered circuit and display output circuit and form, it is characterized in that:

Adopted the circuit that can make the switch triode reverse-conducting on a, the radiating circuit; Promptly at BG ₂Transmitting terminal connect resistance R ₄And capacitor C ₃

Adopted on b, the receiving circuit to postpone the filter interfered circuit, promptly by resistance R ₂₅And capacitor C ₁₈Be in series;

Adopted switching transistor on c, the display output circuit, i.e. D ₁₀Forward end be connected BG ₇Base stage and resistance R ₂₉With R ₃₀The branch pressure side.

2, ultrasonic monitor device according to claim 1 is characterized in that resistance R ₄Elect 80～120 ohm as, capacitor C ₃Elect 0.01～0.047 microfarad as.

3, ultrasonic monitor device according to claim 1 is characterized in that said delay filter interfered circuit is by resistance R ₂₅And capacitor C ₁₈Form resistance R ₂₅Elect 100～500 ohm as, what preferentially recommend is 240 ohm, capacitor C ₁₈Elect 50～120 microfarads as, what preferentially recommend is 100 microfarads.

4, ultrasonic monitor device according to claim 1 is characterized in that the thyratron on the display output circuit is selected switching diode D for use ₁₀With switch triode BG ₇

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