CN202361085U - Inner spherical detector used for detecting leakage of petroleum transmission pipeline - Google Patents

Abstract

The utility model discloses an inner spherical detector used for detecting leakage of a petroleum transmission pipeline. The inner spherical detector comprises a spherical aluminum shell and a polyurethane foam layer outside the spherical aluminum shell, wherein the aluminum shell is internally provided with electronic devices, the electronic devices comprises an ARM (advanced reduced instruction-set computer machine) processor, an inertial measurement unit (IMU), an A/D (analog-digital) converter, a synchronous dynamic random access memory (SDRAM), a NAND Flash, a Micro-SD(secure digital) memory card, an anti-aliasing low pass filter, a preamplifier, an electret capacitor microphone, a rechargeable lithium battery, a power supply module and a connection wire, and the inertial measurement unit (IMU) is internally provided with a digital traxial accelerometer, a magnetometer and a gyroscope. The inner spherical detector disclosed by the utility model has the advantages of high detection sensitivity, low manufacturing cost, small volume, hard blocking in the pipeline, low power consumption, flexibility in use and wide application.

Description

Detect the spherical internal detector that oil transport pipeline leaks

Technical field

The utility model relates to a kind of spherical internal detector that oil transport pipeline leaks that detects.Belong to the device technique field of detecting pipe leakage.

Background technique

Develop rapidly along with pipeline industry; Increasing of pipeline, the growth in pipe age, the manufacturing deficiency of pipeline itself, constructional deficiency and corrosion and artificial destruction etc.; Pipeline accident takes place again and again; Caused huge threat for people's life, property and living environment, therefore, the timely discovery and the location of defective such as Corrosion of Pipeline, crackle and the leakage that caused by defective have important practical significance.

At present, mainly contain two types in the method for domestic and international existing detection pipeline: one type is to detect the external detection method that changes because of physical parameters such as flow that leakage causes, pressure, sound, and using more in these class methods is the suction wave leak detecting.When line fracture takes place to leak; The transient negative pressure ripple that the leakage point abrupt pressure reduction produces is swum propagation along tube wall by leak up and down; Utilize suction wave to pass through the time difference and the velocity of propagation of suction wave in pipeline of upstream and downstream measuring point; Can confirm the leak position, utilize data processing algorithms such as correlation analysis, wavelet transformation, pattern recognition again, accurately identified leakage and precisely location.The main device that this method is used is pressure transmitter; For big leakage; The suction wave leak detecting is sensitive and accurate, but because the suction wave that minute leakage produces decay after long Distance Transmission is serious, pressure transmitter is insensitive to it; For this method DeGrain of minute leakage, often occur failing to report.

Detection method in the another kind of pipe that is based on technology such as magnetic flux, ultrasonic, eddy current, video recording; The pipeline detection technology is to move in pipeline through the intelligent pig that non-destructive detecting device and data capture, processing and storage system are housed; Completion reaches defect size, position Detection purpose the scanning step by step of body.Use the more Pipeline Magnetic Flux Leakage Inspection device (magnetic flux pipeline pig) that is based on the leakage field technology in these class methods, document " Yang Lijian. the research of intelligent Pipeline Magnetic Flux Leakage Inspection device (J). non-destructive inspection, 2002; 24 (3): 100-102 " described in the detection device outward appearance be cylindric, length is at 1.5m～3m, two ends are rubber cups; The leather cup somewhat larger in diameter is in tested caliber; Whole detection device leans on the thrust of oil in the pipeline to advance, and in the process that detection device is advanced, the inner electronic equipment of device can write down the Magnetic leakage flux of the pipe surface that is magnetized; After surveying completion data in the storage are carried out analysing and processing, can judge the defectives such as burn into damage in the pipeline.This method detects accurately, and precision is higher, and shortcoming is to change the in-pipeline detector of respective diameters when detecting the different-diameter pipeline, and is bulky, block even damage having a big risk of pipeline, and it is high to detect cost.

Summary of the invention

The purpose of the utility model is to provide a kind of spherical internal detector that oil transport pipeline leaks that detects, and this sphere internal detector volume is little, low in energy consumption, cost is low, has detection sensitivity height, accurate positioning, is difficult for stopping up and advantage safe and convenient to use.

The utility model is realized through following technological scheme: a kind of spherical internal detector that detects the oil transport pipeline leakage; This sphere internal detector; Comprise the electronic equipment in spherical pressure-bearing aluminum enclosure 5 and the aluminum enclosure; Outside the spherical pressure-bearing aluminum hull is polyurethane foam 3, offers up big and down small cone shape hole 4 on it, and described spherical pressure-bearing aluminum enclosure is to be made up of with the rim of the mouth butt joint and through screw is fastening two hemisphere aluminum enclosure; It is characterized in that: the hemisphere place of a hemisphere aluminum enclosure offers the intercommunicating pore 2 that is shaped on screw thread therein; What be sealed and matched with this intercommunicating pore is sealing head 1, in this hemisphere aluminum enclosure, is connected with boss on the inner walls and with screw interface card 7 and core circuit plate 9 are set; Electronic device is set on interface card, and electronic device comprises the Mini USB interface and powers on and the mechanical switch that cuts off the power supply, status indicator lamp; Core circuit plate 9 is provided with arm processor 13; The electronic device that is connected with this processor is: IMU Inertial Measurement Unit 22, A/D analog-digital converter 24, crystal oscillator 17, usb 12, sdram memory 14, NAND Flash storage 15 and Micro SD storage card 16 wherein are anti-aliasing low-pass filter 23, preamplifier 21 and electret capacitor microphone 20 successively before the A/D analog-digital converter; Interface card and core circuit plate are realized being electrically connected through 6 core winding displacements 8; In another hemisphere aluminum hull, be provided with the power supply circuit board 11 that is connected with screw with the aluminum hull inwall, this circuit board is provided with chargeable lithium cell 19 and power module 18; Power supply circuit board is electrically connected with the core circuit in another hemisphere aluminum hull is firm and hard through 8 core winding displacements 10 at present, and to whole electronic equipment power supply.

The advantage of the utility model: in the process that this device rolls in pipeline, the sound transducer that is provided with in it is with to leak the sound source distance near, but therefore sensing minute leakage acoustic signal, and detection sensitivity is high, when pipeline detection, does not block stifled phenomenon; The Inertial Measurement Unit based on the MEMS technology that is provided with in the device has low cost, little power consumption, volume is little, use is flexible; This device not only can be applicable to the buried oil pipeline road; The detection and the location of the leakage that also can be applicable to the defective such as burn into crackle of ocean oil transport pipeline and cause by defective; This device also can carry various sensors in addition; Like temperature, pressure etc., draw temperature in the pipeline, pressure field distribution, with a wide range of applications.

Description of drawings

Fig. 1 detects the structural representation of the spherical internal detector of oil transport pipeline leakage for the utility model.

Fig. 2 is the electronic apparatus system block diagram on interface card 7, core circuit plate 9 and the power supply circuit board 11 among Fig. 1.

Among the figure: the 1-sealing head; 2-screw thread intercommunicating pore; The 3-polyurethane foam; The 4-cone shape hole; The spherical pressure-bearing aluminum enclosure of 5-; The 6-fastening screw trip bolt; The 7-interface card; 8-6 core winding displacement; The 9-interface card; 10-8 core winding displacement; The 11-power supply circuit board; The 12-USB interface; The 13-ARM processor; The 14-SDRAM internal memory; 15-NAND Flash storage; The 16-MicroSD storage card; The 17-crystal oscillator; The 18-power module; The 19-chargeable lithium cell; The 20-electret capacitor microphone; The 21-preamplifier; 22-Inertial Measurement Unit IMU; The 23-frequency overlapped-resistable filter; The 24-A/D analog-digital converter.

Embodiment

Be described further below in conjunction with accompanying drawing 1 and 2 pairs of the utility model of accompanying drawing.5 is the ball-type pressure-bearing aluminum enclosure of this internal detector among Fig. 1; This housing is made up of with rim of the mouth butt joint and through 3～6 M4*5 fastening screw trip bolts 6 are fastening two hemisphere aluminum enclosure; The lower semisphere aluminum hull is provided with the groove of placing the O RunddichtringO, constitutes radial seal mode, aluminium spherical shell external diameter Φ 100mm between two hemisphere aluminum hulls; Wall thickness 8mm designs withstand voltage >=5MPa; Polyurethane foam 3 fits tightly on spherical pressure-bearing aluminum enclosure, and this foam layer thickness is 30mm; Offer cone shape hole 4 on the polyurethane foam, this cone shape hole large aperture Φ 15mm, small aperture Φ 10mm offers 8 of such cone shape holes; Offer the intercommunicating pore 2 that is shaped on screw thread at the top of episphere aluminum enclosure; This screw thread intercommunicating pore internal thread is M16*15; What be sealed and matched with this intercommunicating pore is sealing head 1, and a sealing outside thread is M16*13, in this hemisphere aluminum enclosure; With boss on the aluminum enclosure inwall and with 3～6 M3*5 screw connection interface circuit boards 7 and core circuit plate 9, interface card is provided with the Mini USB interface, control system powers on and the dial type mechanical switch and the multiple color state tutorial light that cut off the power supply; Core circuit plate 9 is provided with arm processor 15, and this processor is the S3C2440 of ARM9 series, and dominant frequency is 400MHz; The electronic device that is connected with this processor is: IMU Inertial Measurement Unit 24; Model is ADIS16405; This measuring unit includes three number of axle word accelerometers, gyroscope and the magnetometer based on MEMS, and they are through three-dimensional digital acceleration, angular velocity and the magnetic signal of SPI interface output; A/D analog-digital converter 26, model are AD7934-6, and the setting sample rate is 44.1KHz; Crystal oscillator 19, frequency are 12MHz; Usb 14 is the Mini USB interface of standard; Sdram memory 16, model are MT48LC16M16A2, and capacity is 64Mbit; NAND Flash storage 17, model are K9F2G08U0A, and capacity is 256MB; Micro SD storage card 18, capacity are 4GB; Before A/D analog-digital converter 26, be anti-aliasing low-pass filter 25 successively wherein, model is MAX7424, and this wave filter is 5 rank Butterworth LPF, and cutoff frequency is made as 22KHz; Preamplifier 23, model is MAX9814, has the gain of automatic gain control (AGC) and maximum 60dB; Electret capacitor microphone 22, model are WM-61B, and this transducer sensitivity is-35dB that Hz-KHz is 20～20KHz; Interface card 7 is realized being electrically connected through 6 core winding displacements 8 with core circuit plate 9; In the lower semisphere aluminum hull, be provided with power supply circuit board 11, this circuit board is provided with 3.7V chargeable lithium cell 21, and capacity is 9.8Ah; Power module 20, this power module comprise boosted switch type DC-DC chip NCP1450A, and the 3.7V cell voltage is risen to 5V, output capability 1A, and step-down switching type DC-DC chip NCP1550 reduces to 3.3V with the 3.7V cell voltage, and output capability is 2A.Power supply circuit board 11 realizes that with the core circuit plate 9 in the episphere aluminum hull electrical equipment is connected through 8 core winding displacements 10, and to whole electronics power supply.

The utility model can be applied to the oil transport pipeline tiny leakage and detect; Also can be applicable to detect Corrosion of Pipeline and crack defect; Also can be used for confirming of pipeline rout, after adding temperature, pressure transducer in the utility model, also can be used for measuring temperature field and the pressure field in the submarine pipeline.

The working procedure that the utility model is used to detect the oil transport pipeline tiny leakage is following: at first the pipeline left and right sides below the pipeline kilometer stone is buried the extremely relative strong magnet of N, S underground.Utilize the mechanical switch of stirring on the interface card that this detection device is powered on then; Arm processor 13 copied Bootloader, linux kernel mirror image in the sdram memory 14 decompress(ion), startup earlier after system powered on from NANDFlash storage 15; Then move the application program in the NAND Flash storage 15; Treat green state tutorial light flicker on the interface card 7, sealing head 1 is screwed in the screw thread intercommunicating pore 2 tighten, prepare emission.Utilize wiper service tube to be transmitted in the oil transport pipeline by the sphere internal detector; Described wiper (pig) is the existing instrument that is used to clean tube wall and monitoring pipeline internal state; In pipeline, should in pipeline to be monitored, roll by the sphere internal detector under the thrust of oil product; Electronic equipment collection in this process in the spherical internal detector and stored sound signal, acceleration signal and magnetic signal; Concrete: electret capacitor microphone 20 is delivered to microphone preamplifier 21 with the analog acoustic signal that collects and is carried out impedance conversion, signal amplification; Signal after will amplifying is again delivered to frequency overlapped-resistable filter 23 and is carried out Shelving, and filtered signal becomes 12 digital audio signal through analog-digital converter 24; While is based on the Inertial Measurement Unit (IMU) 22 of MEMS; Through three-dimensional acceleration signal in this sphere internal detector rolling process of SPI agreement output and magnetic signal on every side thereof; The acceleration signal and the magnetic signal of digital audio signal and IMU output are transferred to arm processor 13 according to certain time sequence; Arm processor is cached to these data that collect earlier in the sdram memory 14, again with storage to Micro SD storage card 16; After detection finishes; In terminal wiper ball collecting chamber, take out above-mentioned spherical internal detector; The USB cable is connected to computer through Mini usb 12; Arm processor 13 will be stored in data transmission in the Micro SD storage card 16 in computer, utilize upper computer software that the multi-sensor data of gathering is analyzed, handled, and confirm the existence and the position thereof of leaking.

Claims (1)

1. one kind is detected the spherical internal detector that oil transport pipeline leaks; This sphere internal detector comprises the electronic equipment in spherical pressure-bearing aluminum enclosure (5) and the aluminum enclosure, is polyurethane foam (3) outside the spherical pressure-bearing aluminum hull; Offer up big and down small cone shape hole (4) on it; Described spherical pressure-bearing aluminum enclosure is to be made up of with rim of the mouth butt joint and through screw is fastening two hemisphere aluminum enclosure, and it is characterized in that: the hemisphere place of a hemisphere aluminum enclosure offers the intercommunicating pore (2) that is shaped on screw thread therein, and what be sealed and matched with this intercommunicating pore is sealing head (1); In this hemisphere aluminum enclosure; Be connected with boss on the inner walls and with screw interface card (7) and core circuit plate (9) are set, electronic device is set on interface card, electronic device comprises the Mini USB interface and powers on and the mechanical switch that cuts off the power supply, status indicator lamp; Core circuit plate (9) is provided with arm processor (13); The electronic device that is connected with this processor is: IMU Inertial Measurement Unit (22), A/D analog-digital converter (24), crystal oscillator (17), USB interface (12), sdram memory (14), NAND Flash storage (15) and Micro SD storage card (16) were anti-aliasing low-pass filter (23), preamplifier (21) and electret capacitor microphone (20) before the A/D analog-digital converter successively wherein; Interface card and core circuit plate are realized being electrically connected through 6 core winding displacements (8); In another hemisphere aluminum hull, be provided with the power supply circuit board (11) that is connected with screw with the aluminum hull inwall, this circuit board is provided with chargeable lithium cell (19) and power module (18); Power supply circuit board is electrically connected with the core circuit in another hemisphere aluminum hull is firm and hard through 8 core winding displacements (10) at present, and to whole electronic equipment power supply.

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