CN2872386Y

CN2872386Y - Intelligent positioning leakage inspector of underground pipeline

Info

Publication number: CN2872386Y
Application number: CN 200620109886
Authority: CN
Inventors: 张智; 张勤; 陈宗杰; 康健
Original assignee: Chongqing University
Current assignee: Chongqing University
Priority date: 2006-01-27
Filing date: 2006-01-27
Publication date: 2007-02-21
Anticipated expiration: 2016-01-27

Abstract

The utility model discloses an underground pipeline intelligent localization leak detector, including a shell, a sensing head and a measuring circuit board. The sensing head is equipped on the bottom of the shell by a expansion link and is connected with a sound pickup box and in electric connection with a measuring circuit. The shell is provided with the function keys of distance measurement display, function conversion, frequency point conversion, volume control and mute switch. In the utility model, a vent pin acoustic detection system and a multi-probe digital correlator have the advantages of high sensitivity, high resolution and anti-interference capability and could detect small leakage occurrence and position in complicated situation. The detection data could be automatically recorded and processed, with little man's activity influence, with definite and uniform detection results. The detection course is mainly carried out by devices, the working procedure is easy to be standardized and the results are under control. The utilization of multiple probes could not only improve working efficiency, but also provide the explanation working with massive effective information and guarantee the accuracy of detection results, with simple operation and low usage cost.

Description

Underground utilities intelligence location leak locator

Technical field

The utility model relates to the leak supervision technology of municipal water supply for the gas-heating pipe network, is specifically related to all multi-functional digitized high intelligent underground utilities of correlation analysis location leak locator integrated and that optimized the pipeline location, leaked hunting and hunt leak.

Background technology

Water is valuable natural resources.Because the poorness of freshwater resources and high water producing cost, countries in the world especially developed country are all paid much attention to the management work of water supply and water saving.Research, the development of leakage loss control technology and equipment have been carried out very early.20 beginnings of the century adopted simple and easy machinery to listen leakage, 20th century invention forties primary electron leakage listening device, and exploitation leakage seventies noise computing machine is developed battery-driven leak detection facility the eighties, begins to develop the application of digital leak detection and generalized information system in 2000.

In the prior art, the Detection Techniques of leaking mainly are divided into two kinds, zone leak hunting method and regional sound detection method.

The zone method of leaking hunting is more commonly used in practice, and accuracy is higher, but it is complicated and loaded down with trivial details to operate.The core technology of zone sound detection method is: bibcock audition, road surface audition and the affirmation technology of leaking.The bibcock audition promptly utilizes machinery or electronics listening device, by the Detection Techniques personnel's of leaking the sense of hearing and experience, surveys the sound wave that leaks on the bibcock, finds that the sound wave that leaks on the bibcock is unusual, thereby infers generation and the approximate range that leaks; The road surface audition promptly utilizes the electronics listening device, and by the Detection Techniques personnel's of leaking the sense of hearing and experience, it is unusual that the detection leakage point propagates into the sound wave on ground, infers the generation and the scope of leaking; Leak and confirm promptly with the auxiliary correlation detection that leaks of boring audition, the road pavement audition is found confirms to survey unusually, determines the generation of leaking and the accurate position of leak source, confirms to survey the main detection personnel's of dependence on-site experience.

At present, there is following major defect in the Detection Techniques of leaking:

1. because people's ear sensitivity and resolution is relatively low, can not finds in many cases and judge the generation of leaking.For example, in that the piping laying degree of depth is big, pipeline is complicated, sound wave disturbs areas such as bigger, adopt existing Detection Techniques, result of detection is all undesirable.

2. mainly rely on detection personnel's the sense of hearing and experience, detection quality and result can't guarantee.Because each detection personnel there are differences on the sense of hearing and experience, result of detection is not a standard just also, even same detection personnel, the working condition difference of its every day, result of detection is also inequality.

3. result of detection does not have record, can not accurately represent and express, and is difficult to process and result that standard and control are surveyed.

4. the production of domestic instrument research is in the elementary step, the most function singleness of product, and complicated operation, integrated degree is low, and external import instrument expense is very high, influences the penetration and promotion of instrument.

Therefore, develop high intelligence, high precision, multi-functional, integrated, both economical and practical, it is one of important topic of needing to be resolved hurrily of current water supply industry that the pipeline that is easy to penetration and promotion is again located leakage detecting instrument.

Summary of the invention

There is sensitivity and resolution is lower, detection quality and problems such as the result can't guarantee, complicated operation at existing domestic technique, and defectives such as external import instrument use cost height, the purpose of this utility model provides a kind of underground utilities intelligence location leak locator.

The purpose of this utility model is achieved in that underground utilities intelligence location leak locator, housing, sensing head, expansion link, pickup dish, earphone and metering circuit plate; Sensing head is located at the bottom of housing by expansion link, and the pickup dish is connected with sensing head, and sensing head is connected with the input end of metering circuit plate, and earphone is connected with sensing head by metering circuit; Sensing head and metering circuit plate are by storage battery power supply.During the metal detector pipe, replace the pickup dish by range finding wheel and metal detection dish.

Metering circuit comprises pre-amplification circuit, digital filter circuit and the earphone amplifying circuit of series connection, and pre-amplification circuit, digital filter circuit and earphone amplifying circuit select circuit to be connected with the earpiece volume control circuit by amplification quantity control circuit, frequency filtering respectively; Digital filter circuit also is connected with frequency display circuit; The earphone amplifying circuit is connected with earphone.

The metal detection circuit is in series successively by threshold oscillation circuit, detection and beat circuit, flash of light indication driving circuit and earphone amplifying circuit.

Compared to existing technology, the utlity model has following advantage:

1. bibcock acoustic sounding system and many probe digital correlation instrument have advantages such as high sensitivity, high resolving power and antijamming capability are strong, can survey little leaking and take place and the position under complex situations;

2. detection data record and processing automatically, artificial influence is very little, and result of detection is determined and is unified;

3. detection process is main carrying out with the instrument, and its working routine is easy to standard, and the result can control;

4. multi-probe use has not only improved work efficiency, also provides a large amount of effective informations to interpretation work simultaneously, guarantees the accuracy of result of detection;

5. simple to operate, use cost is low.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is the utility model working panel synoptic diagram;

Fig. 3 is the utility model circuit theory diagrams;

Fig. 4 is a kind of embodiment circuit theory diagrams of Fig. 3;

Fig. 5 is the utility model metal detector principle of work.

Embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

As shown in Figure 1, underground utilities intelligence location leak locator comprises housing 1, sensing head 2, expansion link 3, pickup dish 4, earphone 5 and metering circuit plate 6; Sensing head 2 is located at the bottom of housing 1 by expansion link 3, and pickup dish 4 is connected with sensing head 2, and sensing head 2 is connected with the input end of metering circuit plate 6, and earphone 5 is connected with sensing head 2 by metering circuit 6; Sensing head 2 is powered by accumulator 7 with metering circuit plate 6.

During the metal detector pipe, replace pickup dish 4 by range finding wheel 8 and metal detection dish 9.

Referring to Fig. 2, housing 1 is provided with range finding and shows 10 and function key 11, frequency button 12 and frequency spectrum Nogata Figure 13 such as function conversion, frequency conversion, volume control, silence switch.

Referring to Fig. 3, metering circuit (plate) comprises pre-amplification circuit, digital filter circuit and the earphone amplifying circuit of series connection, and pre-amplification circuit, digital filter circuit and earphone amplifying circuit are selected circuit and earpiece volume control circuit control linkage by amplification quantity control circuit, frequency filtering respectively; Digital filter circuit also is connected with frequency display circuit; The earphone amplifying circuit is connected with earphone.Can determine leak source by the crest of frequency display circuit demonstration and the sound of playback earphone.

Fig. 4 is a kind of embodiment circuit diagram of Fig. 3, and wherein IC1-IC10 is S5532, and IC11-IC18 is LW3914.

The detection operations of leaking principle:

When the pipeline inner fluid leaks under pressure, the vibration wave that is produced can be along pipeline or ground buried regions medium (as soil, cement etc.) propagate into ground, leakage water detector is to adopt advanced data acquisition and digital filtering technique these to be gathered and analyze, and the signal of getting rid of other to greatest extent disturbs, thereby makes people find leakage point like a cork.

The metal detector principle of work:

Referring to Fig. 5, the metal detection circuit is made up of high frequency oscillator, oscillating detector, audio frequency oscillator and power amplifier etc., the principle of surveying metal is-regulate the gain potentiometer of high frequency oscillator, and make oscillator be in the threshold oscillation state just, that is to say just to make the oscillator starting of oscillation.When detecting coil when the metal object, because electromagnetic induction phenomenon can produce vortex flow in metallic conductor, energy loss in the oscillation circuit is increased, positive feedback weakens, and the oscillator vibration that is in critical state weakens, even can't keep the required minimum energy of vibration and failure of oscillation.Whether if can detect this variation, and convert voice signal to, have or not according to sound, just can judge has had metal object below the detecting coil.

The utility model be at pipe network safeguard relevant water supply line, for combustion gas, heating pipe network leakage point accurately locate, the custom-designed meter speciallies of needs such as facility and metallic conduit location, measuring distance, its integral body can be located in the instrument knapsack, detects and carry all very convenient.

Claims

1, underground utilities intelligence location leak locator comprises housing (1), sensing head (2) and metering circuit plate (6); It is characterized in that sensing head (2) is located at the bottom of housing (1) by expansion link (3), pickup dish (4) is connected with sensing head (2), sensing head (2) is connected with the input end of metering circuit plate (6), and earphone (5) is connected with sensing head (2) by metering circuit (6); Sensing head (2) is powered by accumulator (7) with metering circuit plate (6); Housing (1) is provided with the range finding display panel (10) that is connected with metering circuit (6) and function conversion, frequency conversion, volume control, a plurality of function keys of silence switch (11).

2, underground utilities intelligence according to claim 1 is located leak locator, it is characterized in that sensing head (2) also disposes range finding wheel (8) and metal detection dish (9).

3, underground utilities according to claim 1 are located leak locator, it is characterized in that described metering circuit (6) comprises pre-amplification circuit, digital filter circuit and the earphone amplifying circuit of series connection, pre-amplification circuit, digital filter circuit and earphone amplifying circuit are selected circuit and earpiece volume control circuit control linkage by amplification quantity control circuit, frequency filtering respectively; Digital filter circuit also is connected with frequency display circuit; The earphone amplifying circuit is connected with earphone.

4, underground utilities according to claim 2 are located leak locator, it is characterized in that described metal detection circuit is in series successively by threshold oscillation circuit, detection and beat circuit, flash of light indication driving circuit and earphone amplifying circuit.