An online crack detection device and a natural gas long-distance pipeline operation management system

Abstract

This invention relates to the field of natural gas transmission technology, specifically to an online crack detection device and a long-distance natural gas pipeline operation management system. The system includes a transmission pipeline, a supporting protective outer pipe, a detection mechanism, crack detection and protection components, and auxiliary components. The detection mechanism enables real-time monitoring of the operating transmission pipeline and provides timely warnings when cracks occur. Furthermore, the coordinated use of the supporting protective outer pipe, crack detection and protection components, and auxiliary components allows for timely remedial work in the event of a crack, mitigating leakage, providing time for repair work, reducing the severity of natural gas leaks, and quickly absorbing and purifying small leaks of natural gas to prevent harm to repair personnel.

Description

Technical Field

[0001] This invention relates to the field of natural gas transmission technology, specifically to an online crack detection device and a long-distance natural gas pipeline operation and management system. Background Technology

[0002] A Chinese patent document with publication number CN212565339U discloses a safety early warning system for long-distance natural gas pipelines. This system utilizes accompanying optical cables around the pipeline as sensors and transmission media. Without affecting the normal communication function of the optical cables, it analyzes temperature, temperature strain, and vibration signals present in the optical cables through temperature sensing hosts, temperature strain sensing hosts, and vibration sensing hosts. This saves on other physical sensors, transmission media, and signal acquisition devices. Furthermore, it has a long transmission distance and can accurately pinpoint every point on the long-distance natural gas pipeline. The optical cables contain no electronic components, require no power supply, and do not radiate electromagnetic waves, making them inherently safe. The system can provide early warning of third-party sabotage: by monitoring the vibration of the accompanying optical cables, it determines the vibration frequency, amplitude, and spatial location of the hazard source, enabling early warning of third-party intrusion and sabotage. It can also provide pipeline leak alarms: by monitoring vibration, strain, and temperature changes, it makes a comprehensive judgment to achieve pipeline leak alarms and location. Chinese patent document CN216010436U discloses a crack detection device for oil pipelines used in oil and gas field engineering safety. This device uses a drive assembly to move a main column within the oil pipeline. The entire main column is supported by a moving support assembly. During the movement of the main column within the pipeline, crack detection components detect cracks in the pipeline, enabling continuous crack detection. It features a high degree of automation, high detection efficiency, simple operation, and strong practicality. It can adapt to oil pipelines of different widths and diameters, making it worthy of widespread application.

[0003] The aforementioned solutions and existing pipeline crack detection systems or devices, on the one hand, are basically designed to detect pipelines under different operating conditions, and their detection capabilities are limited and cannot meet the needs of real-time detection. On the other hand, when performing real-time detection, they generally only serve as warnings and cannot provide timely remedial measures, thus failing to meet the needs of drivers and requiring further improvement and optimization.

[0004] To address these issues, this invention proposes an online crack detection device and a natural gas long-distance pipeline operation and management system. Summary of the Invention

[0005] The purpose of this invention is to provide an online crack detection device and a natural gas long-distance pipeline operation and management system to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an online crack detection device, comprising a conveying pipeline, a supporting protective outer pipe and a detection mechanism, a crack detection and protection component, and an auxiliary component; the detection mechanism is equidistantly connected on the conveying pipeline, and the crack detection and protection component is connected to the detection mechanism; a support rod is fixedly installed on the inner side wall of the supporting protective outer pipe, and a connecting plate is fixedly installed at one end of the support rod; the connecting plate is fixedly installed on the outer side wall of the conveying pipeline by screws.

[0007] Preferably, the supporting and protective outer tube is symmetrically configured into two parts, namely two semi-circular tubes. A connecting plate is fixedly installed at the side joint position of the semi-circular tube, and the connecting plates are fixedly connected by bolts.

[0008] Preferably, the detection mechanism includes a fixed outer ring, a detector, a detection warning module, a pressure probe, and a vibration detector; the fixed outer ring is equidistantly fixed on the outer wall of the conveying pipeline, and detectors are symmetrically fixed on the fixed outer ring. The detectors are connected to the detection warning module and are connected to the pressure probe, which extends into the inside of the conveying pipeline. The vibration detectors are equidistantly connected on the outer wall of the fixed outer ring.

[0009] Preferably, the vibration detector is arranged in a ring at equal intervals on the fixed outer ring to improve its detection range and accuracy; the pressure probe detects the internal pressure inside the conveying pipeline, and the pressure probe is symmetrically arranged inside the conveying pipeline.

[0010] Preferably, the crack detection and protection component includes a first control telescopic rod, a first control module, a fixed connecting plate, a sealing ring cover, a sealing auxiliary ring gasket, an annular bearing strip, a movable auxiliary spherical shell, ventilated round holes, and adsorption and purification beads. The first control telescopic rod is symmetrically fixedly disposed on the outer wall of the fixed outer ring, and the first control module is connected to the first control telescopic rod. One end of the first control telescopic rod is fixedly connected to the fixed connecting plate. The fixed connecting plate is symmetrically fixedly disposed on the sealing ring cover. The sealing ring cover is symmetrically and interactively disposed on the inner sides of both ends of the fixed outer ring cover. A sealing auxiliary ring gasket is fixedly disposed on the inner wall of the sealing ring cover. Annular placement grooves are equidistantly disposed on the inner wall of the sealing auxiliary ring gasket. Annular bearing strips are embedded and fixedly disposed in the annular placement grooves. Movable auxiliary spherical shells are movably embedded in the annular bearing strips at equal intervals. Ventilated round holes are equidistantly disposed on the movable auxiliary spherical shells, and adsorption and purification beads are placed in the movable auxiliary spherical shells. An auxiliary component is connected to the side of the sealing ring cover.

[0011] Preferably, the sealing ring is pushed and pulled by a first control telescopic rod, and the first control telescopic rod is controlled by a first control module, thereby controlling the moving position of the sealing ring.

[0012] Preferably, the movable auxiliary spherical shell is arranged in a ring at equal intervals on the annular bearing strip, which facilitates the sliding operation of the sealing ring cover; the diameter of the adsorption and purification beads is smaller than the inner diameter of the movable auxiliary spherical shell, and the adsorption and purification beads are movable inside the movable auxiliary spherical shell, so that the adsorption and purification beads can adsorb and purify the leaked gas in a timely manner.

[0013] Preferably, the auxiliary component includes a second control telescopic rod, a second control module, a guide connecting plate, a docking sealing auxiliary ring, an annular groove, and a clean cotton strip; the second control telescopic rod is symmetrically fixedly disposed on the outside of the sealing ring cover, and the second control module is connected to the second control telescopic rod; a guide connecting plate is fixedly disposed at one end of the second control telescopic rod; the guide connecting plate is symmetrically fixedly disposed on the outer wall of the docking sealing auxiliary ring; the docking sealing auxiliary ring is movably disposed at the end position of the sealing ring cover, and an annular groove is provided on the end face of the docking sealing auxiliary ring; clean cotton strips are evenly connected in the annular groove.

[0014] Preferably, the thickness of the docking sealing auxiliary ring is less than the depth of the annular groove, and the diameter of the docking sealing auxiliary ring is greater than the diameter of the conveying pipe.

[0015] A natural gas long-distance pipeline operation and management system includes an online crack detection device.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The natural gas long-distance pipeline operation management crack detection system designed in this invention can perform real-time monitoring of the pipeline during operation through its set detection mechanism. It can provide timely warnings when cracks occur, and can detect changes in internal gas pressure and abnormal vibrations of the pipeline sidewalls. The detection methods are diverse, with a wide detection range and high accuracy. Furthermore, through the coordinated use of the set protective outer pipe, crack detection and protection components, and auxiliary components, timely remedial work can be carried out when cracks occur, slowing down leaks, providing time for repair work, reducing the severity of natural gas leakage, and quickly absorbing and purifying small amounts of leaked natural gas to avoid harm to repair personnel and ensure economic benefits; thus meeting practical application needs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the natural gas long-distance pipeline operation and management crack detection system of the present invention;

[0019] Figure 2 This is a schematic diagram on the right side showing the connection between the detection mechanism of the present invention and the crack detection and protection component and auxiliary component structure;

[0020] Figure 3 This is a schematic diagram on the left side showing the connection between the detection mechanism of the present invention and the crack detection and protection component and auxiliary component structure;

[0021] Figure 4 This is a partial schematic diagram of the structural connection of the crack detection and protection component of the present invention;

[0022] Figure 5 This is a partial schematic diagram showing the connection between the auxiliary component and the sealing ring structure of the present invention;

[0023] Figure 6 This is a schematic diagram of the connection of the movable auxiliary spherical shell structure in the crack detection and protection component of the present invention.

[0024] In the diagram: 1. Conveying pipe; 2. Connecting plate; 3. Support rod; 4. Supporting and protective outer pipe; 5. Connecting plate; 6. Detection mechanism; 6. Fixed outer ring sleeve; 601. Detector; 602. Detection and warning module; 603. Pressure probe; 604. Vibration detector; 605. Crack detection and protection assembly; 7. First control telescopic rod; 701. First control module; 702. Fixed connecting plate; 703. Sealing ring cover; 704. Sealing auxiliary ring gasket; 705. Annular bearing insert; 706. Moving auxiliary spherical shell; 707. Ventilation hole; 708. Adsorption and purification beads; 709. Auxiliary assembly; 8. Second control telescopic rod; 801. Second control module; 802. Guide connecting plate; 803. Connecting and sealing auxiliary ring; 804. Annular groove; 805. Purifying soft cotton strip; 806. Detailed Implementation

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below. All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention.

[0026] Please see Figures 1-4An online crack detection device includes a delivery pipe 1, a supporting and protective outer pipe 4, a detection mechanism 6, a crack detection and protection component 7, and an auxiliary component 8. The detection mechanism 6 is equidistantly connected to the delivery pipe 1, and the crack detection and protection component 7 is connected to the detection mechanism 6. A support rod 3 is fixedly installed on the inner wall of the supporting and protective outer pipe 4, and a connecting plate 2 is fixedly installed at one end of the support rod 3. The connecting plate 2 is fixedly installed on the outer wall of the delivery pipe 1 by screws. The supporting and protective outer pipe 4 is symmetrically divided into two parts, namely two semi-circular pipe fittings. A mating plate 5 is fixedly installed at the side mating position of the semi-circular pipe fittings, and the mating plates 5 are fixedly connected by bolts. The detection mechanism 6 includes a fixed outer ring sleeve 601 and a detector 602. The system includes a detection and warning module 603, a pressure probe 604, and a vibration detector 605. A fixed outer ring 601 is equidistantly fixed on the outer wall of the conveying pipe 1, and detectors 602 are symmetrically fixed on the outer ring 601. The detection and warning module 603 is connected to each detector 602, and the detectors 602 are connected to the pressure probe 604, which extends into the conveying pipe 1. Vibration detectors 605 are equidistantly connected to the outer wall of the fixed outer ring 601. The vibration detectors 605 are arranged in a ring around the fixed outer ring 601 to improve their detection range and accuracy. The pressure probe 604 detects the internal pressure of the conveying pipe 1. The interior of channel 1 is symmetrically arranged; the crack detection and protection component 7 includes a first control telescopic rod 701, a first control module 702, a fixed connecting plate 703, a sealing ring cover 704, a sealing auxiliary ring gasket 705, an annular bearing insert 706, a movable auxiliary spherical shell 707, a breathable round hole 708, and an adsorption and purification ball bead 709; the first control telescopic rod 701 is symmetrically fixedly arranged on the outer wall of the fixed outer ring sleeve 601, and the first control module 702 is connected to the first control telescopic rod 701. One end of the first control telescopic rod 701 is fixedly connected to the fixed connecting plate 703, and the fixed connecting plate 703 is symmetrically fixedly arranged on the sealing ring cover 704. The sealing ring cover 704 is symmetrically and interactively arranged on the fixed outer ring sleeve 601. On both inner sides, a sealing auxiliary ring gasket 705 is fixedly installed on the inner wall of the sealing ring cover 704. An annular placement groove is equidistantly arranged on the inner wall of the sealing auxiliary ring gasket 705. An annular bearing strip 706 is embedded and fixedly installed in the annular placement groove. A movable auxiliary spherical shell 707 is movably embedded in the annular bearing strip 706 at equal intervals. A breathable round hole 708 is equidistantly arranged on the movable auxiliary spherical shell 707, and an adsorption and purification ball bead 709 is placed in the movable auxiliary spherical shell 707. An auxiliary component 8 is connected to the side of the sealing ring cover 704. The sealing ring cover 704 is pushed and pulled by a first control telescopic rod 701, and the first control telescopic rod 701 is controlled by a first control module 702, thereby controlling the moving position of the sealing ring cover 704.The movable auxiliary spherical shell 707 is arranged in a ring at equal intervals on the annular bearing insert 706, facilitating the sliding operation of the sealing ring cover 704; the adsorption and purification beads 709 have a diameter smaller than the inner diameter of the movable auxiliary spherical shell 707, and are movable within the movable auxiliary spherical shell 707, allowing for timely adsorption and purification of leaked gas.

[0027] The natural gas long-distance pipeline operation management crack detection system designed in this invention can perform real-time detection on the operating pipeline 1 through the set detection mechanism 6, and can promptly warn of crack problems. It can also detect changes in gas pressure inside the pipeline and abnormal vibration of the pipeline sidewall, with rich detection methods, wide detection range and high accuracy. Furthermore, through the coordinated use of the set support and protection outer pipe 4, crack detection and protection components 7 and auxiliary components 8, timely remedial work can be carried out when cracks occur, slowing down leakage, providing time for repair work, reducing the severity of natural gas leakage, and can also quickly absorb and purify leaked small amounts of natural gas to avoid damage to repair personnel and ensure economic benefits.

[0028] When a crack appears in the conveying pipeline 1, a pressure probe 604 installed inside the pipeline 1 detects changes in internal air pressure; and vibration detectors 605, equidistantly arranged on the fixed outer ring 601, detect abnormal vibrations on the pipeline sidewall. The vibration detectors 605 are arranged in a ring on the fixed outer ring 601 to improve their detection range and accuracy. The pressure probe 604 detects the internal pressure of the conveying pipeline 1 and is symmetrically arranged inside the pipeline 1. After determining the crack location, the crack detection and protection component 7 provides timely protection. The first control telescopic rod 701 at the corresponding position pushes outward under the control of the first control module 702, causing the sealing ring 704 to extend outward until the crack is sealed. At this point, the first control telescopic rod 701 stops. All first control telescopic rods 701 near the crack location on the fixed outer ring 601 are activated. During the sealing process of the sealing ring 704, the sealing ring... The sealing auxiliary ring gasket 705 on the inner wall of the cover 704 provides auxiliary sealing; annular bearing strips 706 are equidistantly arranged on the inner wall of the sealing auxiliary ring gasket 705, and movable auxiliary spherical shells 707 are equidistantly and movably embedded on the annular bearing strips 706. The function of the movable auxiliary spherical shells 707 is to facilitate the sliding operation of the sealing ring cover 704 and avoid excessive wear caused by friction between the sealing ring cover 704 and the conveying pipeline 1 during the sliding process. Adsorption and purification beads 709 are arranged in the movable auxiliary spherical shells 707 for sealing. Subsequently, the overflowing gas enters the moving auxiliary spherical shell 707 through the vent hole 708 and is adsorbed and purified by the adsorption and purification beads 709. The purpose of the adsorption and purification beads 709 having a smaller diameter than the inner diameter of the moving auxiliary spherical shell 707 is to improve the adsorption and purification efficiency of the adsorption and purification beads 709. The supporting and protective outer tube 4 set on the outside of the conveying pipe 1 also serves to prevent the leaked gas from overflowing. For subsequent maintenance, the supporting and protective outer tube 4 can be disassembled and separated from the conveying pipe 1.

[0029] Please see Figures 5-6The auxiliary component 8 includes a second control telescopic rod 801, a second control module 802, a guide connecting plate 803, a docking sealing auxiliary ring 804, an annular groove 805, and a clean cotton strip 806. The second control telescopic rod 801 is symmetrically fixed on the outside of the sealing ring cover 704, and the second control module 802 is connected to the second control telescopic rod 801. One end of the second control telescopic rod 801 is fixedly provided with the guide connecting plate 803, which is symmetrically fixed on the outer wall of the docking sealing auxiliary ring 804. The docking sealing auxiliary ring 804 is movably located at the end position of the sealing ring cover 704, and the end face of the docking sealing auxiliary ring 804 is provided with an annular groove 805. Clean cotton strips 806 are evenly connected in the annular groove 805. The thickness of the docking sealing auxiliary ring 804 is less than the depth of the annular groove 805, and the docking sealing auxiliary ring 806 is more than the depth of the annular groove 805. The diameter of ring 804 is larger than the diameter of the conveying pipe 1. When the crack appears exactly in the middle of the adjacent fixed outer ring 601, the sealing ring cover 704 at the end of the adjacent fixed outer ring 601 is pushed by the first control telescopic rod 701 until the two sealing ring covers 704 come into contact. In order to prevent the gas in the crack from overflowing from the gap of the contacting fixed outer ring 601, the auxiliary component 8 is activated to further seal the gap. That is, under the control of the second control module 802, the second control telescopic rod 801 pushes the docking sealing auxiliary ring 804 until the two docking sealing auxiliary rings 804 come into contact. At the same time, the purification soft cotton strips 806 in the annular grooves 805 at the ends of the two rings intersect to form a sealing absorption ring, which further seals the overflowing gas on the one hand and absorbs and purifies the overflowing gas on the other hand.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An online crack detection device, characterized in that: It includes a conveying pipe (1), a supporting and protective outer pipe (4), a detection mechanism (6), a crack detection and protection component (7), and an auxiliary component (8); the conveying pipe (1) is equidistantly connected with the detection mechanism (6), and the crack detection and protection component (7) is connected to the detection mechanism (6); the inner wall of the supporting and protective outer pipe (4) is fixedly provided with a support rod (3), one end of the support rod (3) is fixedly provided with a connecting plate (2), and the connecting plate (2) is fixedly provided on the outer wall of the conveying pipe (1) by screws; The crack detection and protection component (7) includes a first control telescopic rod (701), a first control module (702), a fixed connecting plate (703), a sealing ring cover (704), a sealing auxiliary ring gasket (705), an annular bearing insert (706), a movable auxiliary spherical shell (707), a breathable round hole (708), and an adsorption and purification ball (709). The first control telescopic rod (701) is symmetrically fixedly arranged on the outer wall of the fixed outer ring sleeve (601), and the first control module (702) is connected to the first control telescopic rod (701). One end of the first control telescopic rod (701) is fixedly connected to the fixed connecting plate (703), and the fixed connecting plate (703) is symmetrically fixedly arranged on the sealing ring cover. On (704), the sealing ring cover (704) is symmetrically and interactively arranged on the inner sides of both ends of the fixed outer ring sleeve (601). The inner side wall of the sealing ring cover (704) is fixedly provided with a sealing auxiliary ring gasket (705). The inner side wall of the sealing auxiliary ring gasket (705) is provided with annular placement grooves at equal intervals. Annular bearing inserts (706) are embedded and fixedly arranged in the annular placement grooves. Movable auxiliary spherical shells (707) are movably embedded in the annular bearing inserts (706) at equal intervals. Ventilation holes (708) are provided on the movable auxiliary spherical shells (707), and adsorption and purification beads (709) are placed in the movable auxiliary spherical shells (707). An auxiliary component (8) is connected to the side of the sealing ring cover (704). The movable auxiliary spherical shell (707) is arranged in a ring at equal intervals on the annular bearing insert (706) to facilitate the sliding operation of the sealing ring cover (704); the diameter of the adsorption and purification beads (709) is smaller than the inner diameter of the movable auxiliary spherical shell (707), and the adsorption and purification beads (709) are movable inside the movable auxiliary spherical shell (707) to adsorb and purify the leaked gas in a timely manner; The auxiliary component (8) includes a second control telescopic rod (801), a second control module (802), a guide connecting plate (803), a docking sealing auxiliary ring (804), an annular groove (805), and a purification cotton strip (806). The second control telescopic rod (801) is symmetrically fixed on the outside of the sealing ring cover (704), and the second control module (802) is connected to the second control telescopic rod (801). One end of the second control telescopic rod (801) is fixedly provided with a guide connecting plate (803). The guide connecting plate (803) is symmetrically fixed on the outer wall of the docking sealing auxiliary ring (804). The docking sealing auxiliary ring (804) is movably disposed at the end position of the sealing ring cover (704), and the end face of the docking sealing auxiliary ring (804) is provided with an annular groove (805). Purification cotton strips (806) are connected at equal intervals in the annular groove (805).

2. The online crack detection device according to claim 1, characterized in that: The supporting and protective outer tube (4) is symmetrically configured into two parts, namely two semi-circular tubes. The side joint of the semi-circular tubes is fixedly provided with a joint plate (5), and the joint plates (5) are fixedly connected by bolts.

3. The online crack detection device according to claim 1, characterized in that: The detection mechanism (6) includes a fixed outer ring (601), a detector (602), a detection warning module (603), a pressure probe (604), and a vibration detector (605). The fixed outer ring (601) is fixedly arranged at equal intervals on the outer wall of the conveying pipe (1), and the detector (602) is symmetrically fixed on the fixed outer ring (601). The detection warning module (603) is connected to the detector (602), and the detector (602) is connected to the pressure probe (604). The pressure probe (604) extends into the inside of the conveying pipe (1). The vibration detector (605) is equidistantly connected on the outer wall of the fixed outer ring (601).

4. The online crack detection device according to claim 3, characterized in that: The vibration detector (605) is arranged in a ring at equal intervals on the fixed outer ring (601) to improve its detection range and accuracy; the pressure probe (604) detects the internal pressure of the conveying pipe (1), and the pressure probe (604) is symmetrically arranged inside the conveying pipe (1).

5. The online crack detection device according to claim 1, characterized in that: The sealing ring cover (704) is pushed and pulled by the first control telescopic rod (701), and the first control telescopic rod (701) is controlled by the first control module (702), thereby controlling the moving position of the sealing ring cover (704).

6. The online crack detection device according to claim 1, characterized in that: The movable auxiliary spherical shell (707) is arranged in a ring at equal intervals on the annular bearing insert (706) to facilitate the sliding operation of the sealing ring cover (704); the diameter of the adsorption and purification beads (709) is smaller than the inner diameter of the movable auxiliary spherical shell (707), and the adsorption and purification beads (709) are movable inside the movable auxiliary spherical shell (707) to adsorb and purify the leaked gas in a timely manner.

7. The online crack detection device according to claim 1, characterized in that: The thickness of the docking sealing auxiliary ring (804) is less than the depth of the annular groove (805), and the diameter of the docking sealing auxiliary ring (804) is greater than the diameter of the conveying pipe (1).

8. A natural gas long-distance pipeline operation and management system, characterized in that: The invention includes an online crack detection device as described in any one of claims 1-7.

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