Novel annular array type ultrasonic pipeline interior detection device

Abstract

The utility model provides a novel annular array type ultrasonic pipeline interior detection device which comprises a battery section, an electronic section and a probe section which are sequentially connected through a universal joint, and an ultrasonic excitation transmitting circuit, a signal receiving circuit, a signal acquisition circuit, a signal processing circuit and a signal storage and analysis circuit are arranged in the electronic section. The electronic section is in circuit connection with the probe section through a multi-core cable, a plurality of ultrasonic probe units are arranged in the probe section, the mileage section is fixedly connected with any one of the battery section, the electronic section and the probe section, one or more mileage wheels are arranged on the mileage section, and the mileage wheels are connected with the electronic section at the front end through a watertight connector. The metal loss and crack detection device has the beneficial effects that the technical problem that metal loss and crack detection cannot be simultaneously realized in the prior art is solved. The problems are solved by utilizing a mode of matching the electronic section, the probe section and the mileage section. According to the scheme, regular detection can be effectively carried out on the long-distance pipeline, and long-period safe operation of an oil field is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas field development technology, and more specifically to a novel ring array ultrasonic pipeline internal detection device. Background Technology

[0002] Ultrasonic testing is a commonly used non-destructive testing method. It is widely applicable, convenient, and efficient, with no harmful effects on the tested specimens or the environment. However, in the field of online inspection of oil and gas pipelines, the currently used straight-probe ultrasonic technology develops and uses separate equipment for measuring pipe wall thickness and measuring cracks in the pipeline body. This results in high inspection costs, long inspection cycles, and the inability to comprehensively analyze wall corrosion and crack defects in data analysis.

[0003] Therefore, there is an urgent need for an ultrasonic testing device that can detect multiple defects simultaneously. At the same time, ultrasonic signal processing methods are also developing towards wavelet transforms. Utility Model Content

[0004] This invention overcomes the shortcomings of the prior art and provides a novel ring array ultrasonic pipe internal detection device.

[0005] The objective of this utility model is achieved through the following technical solution.

[0006] A novel ring-array ultrasonic pipeline inspection device includes: a battery section, an electronic section, and a probe section connected sequentially via a universal joint. The electronic section contains an ultrasonic excitation transmitting circuit, a signal receiving circuit, a signal acquisition circuit, a signal processing circuit, and a signal storage and analysis circuit. The electronic section is connected to the probe section via a multi-core cable. The probe section contains multiple ultrasonic probe units. A mileage section is fixedly connected to any one of the battery section, electronic section, and probe section. The mileage section has one or more mileage wheels, which are connected to the electronic section at the front end via a watertight connector.

[0007] The battery unit includes a battery compartment and a traction head. The two ends of the battery compartment are fixedly connected to the traction head and the universal joint, respectively.

[0008] Each of the battery, electronic, probe, and odometer sections has one or more rubber cups.

[0009] The ultrasonic probe units in the probe section are arranged in a ring array on the side wall of the probe section.

[0010] The number of ultrasonic probe units is 16.

[0011] The ultrasonic probe unit contains 256 detection channels.

[0012] The odometer is composed of three odometer wheels evenly arranged along the circumference.

[0013] Multiple centering wheels are installed on the probe section and the mileage section.

[0014] A novel ultrasonic signal processing method for an ultrasonic pipeline internal detection device with a ring array, comprising the following steps:

[0015] S1. The pipeline ultrasonic testing system is placed inside the pipeline to be tested. The battery cell supplies power to the electronic cell, probe cell, and odometer cell. The electronic cell amplifies the ultrasonic electrical signal of the ultrasonic probe unit through the ultrasonic excitation transmitting circuit. The ultrasonic signal is received by the signal receiving circuit and the signal acquisition circuit, processed by the signal processing circuit, and finally analyzed by the signal storage and analysis circuit.

[0016] S2. The signal processing circuit filters the signal, and does not process signals with a maximum amplitude value below the threshold, nor does it process signals without small waveforms.

[0017] S3. The signal processing circuit performs wavelet analysis on the signal, selects the wavelet function, determines the number of wavelet layers, and performs wavelet decomposition on the signal.

[0018] S4. The signal processing circuit performs noise reduction processing on the decomposed high-frequency coefficients, sequentially performing noise reduction processing, signal reconstruction, and wavelet singularity detection.

[0019] S5. Perform defect calculations, using wavelet transform algorithm to calculate the remaining thickness, crack length, depth, and width, and determine the feasibility level.

[0020] S6. Comprehensive judgment: Based on the weld location, defect level and type, and historical data, determine the acceptability of the defect.

[0021] The wavelet analysis in S3 uses the 3 dB wavelet analysis method, with an analysis level of 4.

[0022] The beneficial effects of this utility model are as follows: This solution improves upon the existing technology's inability to simultaneously detect metal loss and cracks. By utilizing a combination of an electronic section, a probe section, and a mileage section, the aforementioned problem is solved. Furthermore, since existing technologies process ultrasonic signals using Fourier transform to detect both metal loss and cracks, this process suffers from the loss of some time information, leading to significant errors. Therefore, the detection and analysis method has been improved by performing wavelet transform on the ultrasonic waves. This ensures that time information is not lost when the ultrasonic signal is transformed from the time domain to the frequency domain, thus improving detection efficiency.

[0023] In summary, this solution can effectively conduct regular inspections of long-distance pipelines, ensuring the long-term safe operation of oil fields. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model.

[0025] In the diagram: 1. Battery joint; 101. Battery compartment; 102. Pulling head; 2. Electronic joint; 3. Probe joint; 301. Ultrasonic probe unit; 4. Mileage joint; 401. Mileage wheel; 5. Universal joint; 6. Leather cup; 7. Centering wheel. Detailed Implementation

[0026] Example

[0027] A novel ring-array ultrasonic pipe internal inspection device includes: a battery section 1, an electronic section 2, and a probe section 3 connected sequentially by a universal joint 5. The electronic section 2 is equipped with an ultrasonic excitation transmitting circuit, a signal receiving circuit, a signal acquisition circuit, a signal processing circuit, and a signal storage and analysis circuit. The electronic section 2 is connected to the probe section 3 via a multi-core cable. The probe section 3 is equipped with multiple ultrasonic probe units 301. A mileage section 4 is fixedly connected to any one of the battery section 1, electronic section 2, and probe section 3. The mileage section 4 is equipped with one or more mileage wheels 401, which are connected to the electronic section 2 at the front end via a watertight connector.

[0028] Battery cell 1 includes battery compartment 101 and pull head 102. The two ends of battery compartment 101 are fixedly connected to pull head 102 and universal joint 5, respectively.

[0029] Each of the battery cell 1, the electronic cell 2, the probe cell 3, and the mileage cell 4 is equipped with one or more diaphragm cups 6.

[0030] Each ultrasonic probe unit 301 in the probe section 3 is arranged in a ring array on the side wall of the probe section 3.

[0031] The number of ultrasonic probe units 301 is 16.

[0032] The ultrasonic probe unit 301 contains 256 detection channels.

[0033] Mileage section 4 consists of three mileage wheels evenly arranged along the circumference.

[0034] Multiple centering wheels 7 are provided on the probe section 3 and the mileage section 4.

[0035] like Figure 1As shown, this device connects the battery section 1, the electronic section 2, and the probe section 3 via a universal joint 5, allowing it to bend and deform within the pipeline, thus enabling movement between pipelines. The battery section 1 supplies power to the electronic section 2, the probe section 3, and the odometer section 4. The electronic section 2 contains an ultrasonic excitation transmitting circuit, a signal receiving circuit, a signal acquisition circuit, a signal processing circuit, and a signal storage and analysis circuit to realize the functions of transmitting, receiving, acquiring, processing, storing, and analyzing ultrasonic signals. All of the above circuits are conventional circuits. The probe section 3 performs circumferential inspection of the pipeline interior through an ultrasonic probe unit 301, simultaneously detecting metal loss and cracks in the pipeline using ultrasonic signals. The odometer section 4 uses an odometer wheel 401 to detect mileage data as it moves through the pipeline. In this embodiment, the odometer section 4 is mounted on the battery section 1, and can be adjusted and mounted on any section for use depending on the environment.

[0036] Furthermore, this device is moved by a pulling head 102. The cup 6 and the detection pipeline have an interference fit structure to create a pressure difference between the pipeline behind the inner detector and the pipeline in front of the inner detector. When the inner detector has no power, it cannot move on its own and needs to move forward under the pressure difference condition in the pipeline. The centering wheel 7 is used to center the entire device to ensure its relatively stable position in the pipeline.

[0037] The operating steps of this device include:

[0038] S1. The ultrasonic testing system for pipelines is placed inside the pipeline to be tested. Battery 1 provides power to electronic 2, probe 3 and mileage 4. Electronic 2 amplifies the ultrasonic electrical signal of ultrasonic probe unit 301 through ultrasonic excitation transmitting circuit. The ultrasonic signal is received by signal receiving circuit and signal acquisition circuit, processed by signal processing circuit, and finally analyzed by signal storage and analysis circuit.

[0039] S2. The signal processing circuit filters the signal, and does not process signals with a maximum amplitude value below the threshold, nor does it process signals without small waveforms.

[0040] S3. The signal processing circuit performs wavelet analysis on the signal, selects the wavelet function, determines the number of wavelet layers, and performs wavelet decomposition on the signal.

[0041] S4. The signal processing circuit performs noise reduction processing on the decomposed high-frequency coefficients, sequentially performing noise reduction processing, signal reconstruction, and wavelet singularity detection.

[0042] S5. Perform defect calculations, using wavelet transform algorithm to calculate the remaining thickness, crack length, depth, and width, and determine the feasibility level.

[0043] S6. Comprehensive judgment: Based on the weld location, defect level and type, and historical data, determine the acceptability of the defect.

[0044] The wavelet analysis in S3 uses the 3 dB wavelet analysis method, with an analysis level of 4.

[0045] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made in accordance with the claims of this utility model should still fall within the patent coverage of this utility model.

Claims

1. A novel ring array ultrasonic pipe internal inspection device, characterized in that, include: The battery section, electronic section, and probe section are connected sequentially via a universal joint. The electronic section contains an ultrasonic excitation transmitting circuit, a signal receiving circuit, a signal acquisition circuit, a signal processing circuit, and a signal storage and analysis circuit. The electronic section is connected to the probe section via a multi-core cable. The probe section contains multiple ultrasonic probe units. The mileage section is fixedly connected to any one of the battery section, electronic section, and probe section. The mileage section has one or more mileage wheels, which are connected to the electronic section at the front end via a watertight connector.

2. The novel ring array ultrasonic pipe internal detection device according to claim 1, characterized in that: The battery module includes a battery compartment and a traction head, with both ends of the battery compartment fixedly connected to the traction head and a universal joint, respectively.

3. The novel annular array ultrasonic pipe internal detection device according to claim 1, characterized in that: Each of the battery section, the electronic section, the probe section, and the odometer section is provided with one or more diaphragm cups.

4. The novel annular array ultrasonic pipe internal detection device according to claim 1, characterized in that: The ultrasonic probe units in the probe section are arranged in a ring array on the side wall of the probe section.

5. A novel ring array ultrasonic pipe internal detection device according to claim 4, characterized in that: The number of ultrasonic probe units is 16.

6. A novel ring array ultrasonic pipe internal detection device according to claim 5, characterized in that: The ultrasonic probe unit contains 256 detection channels.

7. A novel ring array ultrasonic pipe internal detection device according to claim 1, characterized in that: The mileage section consists of three mileage wheels evenly arranged along the circumference.

8. A novel ring array ultrasonic pipe internal detection device according to claim 1, characterized in that: The probe section and the mileage section are equipped with multiple straightening wheels.

Images