Hydrogen-doped natural gas pipeline non-stop transmission on-line monitoring device

Abstract

The application relates to the technical field of natural gas pipeline detection equipment, and particularly discloses a hydrogen-mixed natural gas pipeline non-stop transmission on-line monitoring device, which comprises a magnetic adding mechanism and a detection mechanism which are symmetrically arranged along the axis of a measured pipeline, the magnetic adding mechanism is used for magnetizing the measured pipeline, and the detection mechanism is used for detecting magnetic flux leakage; a rotary driving mechanism, the magnetic adding mechanism and the detection mechanism are installed on the rotary driving mechanism, the rotary driving mechanism is used for driving the magnetic adding mechanism and the detection mechanism to make circumferential motion around the axis of the measured pipeline; and clamping mechanisms which are arranged at intervals, the clamping mechanisms are arranged in the circumferential direction of the measured pipeline in a sleeving mode, and the rotary driving mechanism is arranged at the end of one of the clamping mechanisms; and a telescopic mechanism, two ends of the telescopic mechanism are respectively connected to two groups of the clamping mechanisms, the telescopic mechanism is used for adjusting the spacing between the two groups of the clamping mechanisms, and is used for improving the convenience during natural gas pipeline detection and improving the detection efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of natural gas pipeline detection equipment, and particularly relates to a hydrogen-containing natural gas pipeline on-line monitoring device without stopping transmission. BACKGROUND

[0002] In the field of safe operation of hydrogen-containing natural gas pipelines, pipeline fracture risk detection is a key link to ensure stable operation of the system. Since hydrogen has strong permeability and hydrogen embrittlement effect, it is easy to cause deterioration of the mechanical properties of pipeline materials and cause crack propagation and even sudden fracture. Therefore, potential risks need to be identified in advance through effective detection means.

[0003] For hydrogen-containing natural gas pipelines made of ferromagnetic materials, a detection method based on the principle of magnetic flux leakage is often used. This method relies on the cooperative work of pipeline magnetization equipment and magnetic flux leakage detection equipment: the pipeline to be detected is magnetized to a saturated state by the magnetization equipment, so that a magnetic flux leakage field is generated at the defect, and then the magnetic flux leakage signal is captured by the detection equipment to determine the fracture risk.

[0004] However, the existing detection process has significant defects. The detection needs to be manually operated. After completing the detection of a section, the magnetization equipment and the detection equipment need to be disassembled, transported to the next section to be detected, and then reinstalled and calibrated before the next round of detection can be carried out. In this process, the disassembly, position adjustment and parameter calibration of the equipment consume a lot of working hours and require a lot of manual labor. Especially for long-distance pipelines, frequent start-stop and reinstallation result in extremely low detection efficiency, which is difficult to meet the actual needs of rapid and continuous monitoring of hydrogen-containing natural gas pipelines. Moreover, the repeated disassembly and assembly can introduce positioning errors, affecting the detection accuracy and restricting the timely warning of pipeline fracture risks. SUMMARY

[0005] The embodiment of the present application provides a hydrogen-containing natural gas pipeline on-line monitoring device without stopping transmission, which solves the problem of time-consuming and labor-intensive detection and low detection efficiency in the prior art.

[0006] The embodiment of the present application provides a hydrogen-containing natural gas pipeline on-line monitoring device without stopping transmission, which solves the problem of time-consuming and labor-intensive detection and low detection efficiency in the prior art. The embodiment of the present application provides a hydrogen-containing natural gas pipeline on-line monitoring device without stopping transmission, which solves the problem of time-consuming and labor-intensive detection and low detection efficiency in the prior art.

[0007] In a possible implementation, the rotating driving mechanism comprises: an annular plate, which is sleeved around the circumference of the measured pipeline and has an inner wall spaced from the outer wall of the measured pipeline; a gear ring, which is arranged on one side of the annular plate and is coaxially connected with the annular plate for rotation; wherein the detection mechanism and the magnetizing mechanism are arranged on the side of the gear ring away from the annular plate; the annular plate and the gear ring are both C-shaped, and the openings of the C-shaped gear ring and the annular plate are used for entering and exiting the measured pipeline; a plurality of driving gears are arranged on the outer side of the gear ring and are engaged with the gear ring; wherein the driving gears are rotatably arranged on the surface of the annular plate; a driving motor is mounted on the surface of the annular plate, and the output shaft of the driving motor is connected with one of the driving gears; and a synchronous belt is drivingly connected with each of the driving gears.

[0008] In a possible implementation, the clamping mechanism comprises: an outer tube, a clamping plate, and a connecting rod mechanism; wherein a plurality of groups of the clamping plates are arranged in an annular array on the inner wall of the outer tube; the outer tube is sleeved around the circumference of the measured pipeline, and each group of the clamping plates is arranged between the measured pipeline and the outer tube; the connecting rod mechanism is arranged between each group of the clamping plates and the inner wall of the outer tube, and is respectively hingedly connected with the clamping plates and the inner wall of the outer tube; and an outer tube driving assembly is arranged in the outer tube, and two ends of the outer tube driving assembly are respectively connected with the clamping plates and the outer tube; wherein the outer tube driving assembly is used to drive the clamping plates to move in the outer tube.

[0009] In a possible implementation, the outer tube comprises: two groups of arc-shaped plates arranged symmetrically, the openings of the two groups of arc-shaped plates are oppositely arranged, and the openings of the two groups of arc-shaped plates are fastened by bolts at both ends; and a semi-annular bottom plate is arranged at the end wall of each group of the arc-shaped plates; one end of the outer tube driving assembly away from the clamping plate is connected with the inner wall of the semi-annular bottom plate.

[0010] In a possible implementation, the clamping plate comprises: a cross-shaped mounting seat arranged at the end of the arc-shaped plate away from the semi-annular bottom plate; wherein the intersection area of the cross-shaped mounting seat is arranged in a hole for sleeving the outer wall of the measured pipeline; a plurality of strip-shaped sliding holes are arranged on the outer wall of each supporting rod of the cross-shaped mounting seat; an L-shaped rod is slidingly arranged in the strip-shaped sliding hole at one end of the outer wall, and is arranged in parallel with the axis of the measured pipeline at the other end; and an arc-shaped friction plate is arranged on the outer wall of the end of the L-shaped rod away from the cross-shaped mounting seat, and the curved surface of the arc-shaped friction plate faces the measured pipeline; wherein one end of the outer tube driving assembly away from the semi-annular bottom plate is connected with the cross-shaped mounting seat, and the outer tube driving assembly is used to adjust the distance between the cross-shaped mounting seat and the semi-annular bottom plate.

[0011] In a possible implementation, the outer tube driving assembly comprises: a first electric telescopic rod, at least two groups of the first electric telescopic rod are arranged at two sides of the axis of the measured pipeline, one end of the first electric telescopic rod is connected to the semi-ring bottom plate, and the other end is connected to the cross mounting seat.

[0012] In a possible implementation, the outer tube driving assembly further comprises: a plurality of roller mechanisms, the plurality of roller mechanisms are arranged in an annular array on the outer wall of the measured pipeline, and the roller mechanisms are arranged between the cross mounting seat and the outer wall of the measured pipeline; wherein the roller mechanism comprises: a plurality of mounting blocks, the mounting blocks are arranged at the inner ring outer wall of the cross mounting seat; a suspension rod, one end of the suspension rod is hinged to the mounting block, and the other end of the suspension rod is inclined and directed to the outer wall of the measured pipeline; a traveling wheel, the traveling wheel is mounted at the end of the suspension rod away from the mounting block, and the outer wall of the traveling wheel is in abutment with the outer wall of the measured pipeline; and a spring rod, one end of the spring rod is hinged to the mounting block, and the other end of the spring rod is hinged to the suspension rod; wherein the end of the spring rod close to the mounting block is arranged in spaced manner with the suspension rod, and the other end of the spring rod is connected to the middle region of the suspension rod.

[0013] The one or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0014] When the natural gas pipeline is monitored, the rotating driving mechanism with the detection mechanism and the magnetizing mechanism is sleeved on the circumferential outer wall of the measured pipeline, so that the detection mechanism and the magnetizing mechanism are symmetrically arranged on the circumferential outer wall of the measured pipeline along the axis of the measured pipeline, then, the two sets of clamping mechanisms are sleeved on the measured pipeline, so that the two sets of clamping mechanisms are arranged in spaced manner, and the two ends of the telescopic mechanism are fixed on the two sets of clamping mechanisms, respectively.

[0015] When detection is performed, the magnetizing mechanism comprises a permanent magnet assembly or an electromagnetic coil assembly, the installation position of the magnetizing mechanism corresponds to the to-be-detected region of the measured pipeline, and the magnetizing mechanism can be matched with the outer surface or the inner surface of the measured pipeline at a preset interval.

[0016] The magnetizing mechanism is used for applying a strong magnetic field to the to-be-detected region of the ferromagnetic measured pipeline, so that the ferromagnetic material of the to-be-detected region of the measured pipeline reaches a saturated magnetization state, when there is a damage defect on the surface or the near-surface of the pipeline, the magnetic force line in the saturated magnetization state will be distorted and overflowed at the damage defect, and a magnetic leakage field is formed.

[0017] The detection mechanism comprises at least one group of magnetic sensor arrays, such as Hall elements and magnetoresistance sensors, the detection mechanism is arranged close to the magnetizing mechanism, the detection end of the detection mechanism corresponds to the coverage range of the magnetic leakage field of the to-be-detected region of the pipeline, and the detection mechanism can be driven by the rotating driving mechanism to move along the axis or the circumference of the pipeline synchronously with the magnetizing mechanism.

[0018] The testing agency uses it to collect leakage magnetic field signals generated by damage defects in the pipeline area to be tested in real time, and converts the leakage magnetic field signals into transmittable electrical signals.

[0019] After the test, one of the clamping mechanisms releases its clamping state from the tested pipe, and the telescopic mechanism extends. One end of the telescopic mechanism is fixed to another clamping mechanism that is not yet released from clamping. When the telescopic mechanism extends, it pushes the released clamping mechanism to move along the axial direction of the tested pipe on its outer wall. Then, the previously released clamping mechanism clamps the outer wall of the tested pipe again, and the previously not released clamping mechanism releases its clamping state. The telescopic mechanism retracts, and through the telescopic mechanism, it drives the currently released clamping mechanism to move closer to the other clamping mechanism. Through the alternating operation of the two sets of clamping mechanisms and the telescopic mechanism, the purpose of the two sets of clamping mechanisms driving the testing mechanism and the magnetizing mechanism to move on the pipe is achieved. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments of the present invention or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the monitoring device structure provided in the embodiments of this application;

[0022] Figure 2 This is a schematic diagram of the rotary drive mechanism structure provided in the embodiments of this application;

[0023] Figure 3 This is a schematic diagram of the clamping mechanism structure provided in an embodiment of this application;

[0024] Figure 4 This is a schematic diagram of the outer tube structure provided in an embodiment of this application;

[0025] Figure 5 This is a schematic diagram of the clamping plate structure provided in an embodiment of this application;

[0026] Figure 6 This is a schematic diagram of the linkage mechanism structure provided in the embodiments of this application;

[0027] Figure 7 This is a schematic diagram of the installation of the first electric telescopic pole provided in an embodiment of this application;

[0028] Figure 8 This is a schematic diagram of the roller mechanism structure provided in an embodiment of this application.

[0029] icon:

[0030] 100 - Magnetizing mechanism;

[0031] 200 - Testing institutions;

[0032] 300 - The pipe being tested;

[0033] 400- Rotary drive mechanism;

[0034] 410 - Ring plate; 420 - Gear ring; 430 - Drive gear; 440 - Drive motor; 450 - Synchronous belt;

[0035] 500 - Clamping mechanism;

[0036] 510 - Outer tube;

[0037] 511 - Curved plate; 512 - Semi-circular bottom plate;

[0038] 520-plyboard;

[0039] 521-Cross mounting base; 522-Strip-shaped sliding hole; 523-L-bar; 524-Arc-shaped friction plate;

[0040] 530 - Linkage mechanism;

[0041] 540 - Outer tube drive assembly;

[0042] 541 - First electric telescopic pole;

[0043] 600 - Telescopic mechanism;

[0044] 700-Roller Mechanism;

[0045] 710 - Mounting block; 720 - Suspension rod; 730 - Traveling wheel; 740 - Spring rod. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] In the description of the embodiments of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the embodiments of the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0048] Example 1

[0049] Please see Figures 1 to 8 A hydrogen-blended natural gas pipeline uninterrupted online monitoring device includes: a magnetizing mechanism 100 and a detection mechanism 200 symmetrically arranged along the axis of the pipeline under test 300, wherein the magnetizing mechanism 100 is used to magnetize the pipeline under test 300, and the detection mechanism 200 is used to detect magnetic leakage; a rotary drive mechanism 400, sleeved around the circumference of the pipeline under test 300, wherein the magnetizing mechanism 100 and the detection mechanism 200 are mounted on the rotary drive mechanism 400, and the rotary drive mechanism 400 is used to drive the magnetizing mechanism 100 and the detection mechanism 200 to perform circular motion around the axis of the pipeline under test 300; clamping mechanisms 500 spaced apart, wherein the clamping mechanisms 500 are spaced apart around the circumference of the pipeline under test 300, and the rotary drive mechanism 400 is located at the end of one of the clamping mechanisms 500; and a telescopic mechanism 600, wherein two sets of clamping mechanisms 500 are respectively connected at both ends, and the telescopic mechanism 600 is used to adjust the distance between the two sets of clamping mechanisms 500.

[0050] In the above embodiments, when monitoring a natural gas pipeline, a rotary drive mechanism 400 with a detection mechanism 200 and a magnetizing mechanism 100 is fitted onto the outer circumferential wall of the pipeline under test 300, such that the detection mechanism 200 and the magnetizing mechanism 100 are symmetrically arranged along the axis of the pipeline under test 300 on the outer circumferential wall of the pipeline under test. Subsequently, two sets of clamping mechanisms 500 are fitted onto the pipeline under test 300, such that the two sets of clamping mechanisms 500 are spaced apart, and the two ends of the telescopic mechanism 600 are respectively fixed onto the two sets of clamping mechanisms 500.

[0051] During testing, the magnetizing mechanism 100 includes a permanent magnet assembly or an electromagnetic coil assembly, the installation position of which corresponds to the area to be tested of the pipe 300 under test, and can form a preset distance with the outer or inner surface of the pipe 300 under test.

[0052] The magnetizing mechanism 100 is used to apply a strong magnetic field to the area to be tested of the ferromagnetic pipe 300, so that the ferromagnetic material in the area to be tested of the pipe 300 reaches the saturated magnetization state. When there are damage defects on or near the surface of the pipe, the magnetic lines of force in the saturated magnetization state will be distorted and overflow at the damage defect, forming a leakage magnetic field.

[0053] The detection mechanism 200 includes at least one set of magnetic sensor arrays, such as Hall elements and magnetoresistive sensors. The detection mechanism 200 is located close to the magnetizing mechanism 100, and its detection end corresponds to the leakage magnetic field coverage of the pipeline to be detected area. At the same time, it can be driven by the rotary drive mechanism 400 to move synchronously with the magnetizing mechanism 100 along the axial or circumferential direction of the pipeline.

[0054] The testing unit 200 is used to collect leakage magnetic field signals generated by damage defects in the pipeline in real time, and convert the leakage magnetic field signals into transmittable electrical signals.

[0055] After the test, one of the clamping mechanisms 500 releases its clamping state from the tested pipe 300, and the telescopic mechanism 600 extends. One end of the telescopic mechanism 600 is fixed to another clamping mechanism 500 that is not released from clamping. When the telescopic mechanism 600 extends, it pushes the released clamping mechanism 500 to move along the axial direction of the tested pipe 300 on the outer wall of the tested pipe 300. Then, the previously released clamping mechanism 500 clamps the outer wall of the tested pipe 300 again, and the previously not released clamping mechanism 500 releases its clamping state. The telescopic mechanism 600 retracts, and the telescopic mechanism 600 drives the currently released clamping mechanism 500 to move closer to the other clamping mechanism 500. Through the alternating operation of the two sets of clamping mechanisms 500 and the telescopic mechanism 600, the purpose of the two sets of clamping mechanisms 500 driving the testing mechanism 200 and the magnetizing mechanism 100 to move on the pipe is achieved.

[0056] Example 2

[0057] Please see Figures 1 to 8The rotary drive mechanism 400 includes: an annular plate 410, sleeved around the circumference of the pipe 300 being tested, with its inner wall spaced from the outer wall of the pipe 300 being tested; and a toothed ring 420, disposed on one side of the annular plate 410 and coaxially rotatably connected to the annular plate 410; wherein the detection mechanism 200 and the magnetizing mechanism 100 are spaced apart on the side of the toothed ring 420 away from the annular plate 410; both the annular plate 410 and the toothed ring 420 are C-shaped, and the C-shaped toothed ring... The openings of the annular plate 410 and 420 are used for the entry and exit of the pipe 300 to be tested; a plurality of spaced drive gears 430 are located on the outside of the gear ring 420 and mesh with the gear ring 420; wherein the drive gears 430 are rotatably mounted on the surface of the annular plate 410; a drive motor 440 is mounted on the surface of the annular plate 410, and the output shaft of the drive motor 440 is connected to one of the drive gears 430; a synchronous belt 450 drives and connects each of the drive gears 430.

[0058] In the above embodiment, the annular plate 410 is used to provide an installation platform for the gear ring 420, so that when the output shaft of the drive motor 440 rotates, it drives one of the drive gears 430 to rotate on the installation platform. When one of the drive gears 430 rotates, it drives the other drive gears 430 to rotate through multiple synchronous belts 450. By rotating on one side of the gear ring 420 through multiple drive gears 430, the gear ring 420 meshing with it is driven to rotate on one side of the annular plate 410. Since the detection mechanism 200 and the magnetizing mechanism 100 are installed on the gear ring 420, the rotating gear ring 420 can drive the detection mechanism 200 and the magnetizing mechanism 100 to make circular motion around the axis of the pipe 300 being tested.

[0059] The toothed ring 420 and the annular plate 410 are C-shaped and have openings. During the installation of the toothed ring 420 and the annular plate 410, the pipe to be tested 300 can enter the inner ring of the toothed ring 420 and the annular plate 410 through the openings. The installed toothed ring 420 is coaxial with the pipe to be tested 300.

[0060] Example 3

[0061] Please see Figures 1 to 8The clamping mechanism 500 includes: an outer tube 510, clamping plates 520, and a linkage mechanism 530; wherein the clamping plates 520 are provided in multiple sets, and the multiple sets of clamping plates 520 are arranged in a ring array on the inner wall of the outer tube 510; the outer tube 510 is sleeved around the circumference of the pipe under test 300, and each set of clamping plates 520 is disposed between the pipe under test 300 and the outer tube 510; the linkage mechanism 530 is disposed between each set of clamping plates 520 and the inner wall of the outer tube 510, and is hinged to the clamping plates 520 and the inner wall of the outer tube 510 respectively; and an outer tube driving assembly 540 is disposed inside the outer tube 510, and the two ends of the outer tube driving assembly 540 are respectively connected to the clamping plates 520 and the outer tube 510; wherein the outer tube driving assembly 540 is used to drive the clamping plates 520 to move inside the outer tube 510.

[0062] In the above embodiment, when the clamping mechanism 500 needs to clamp the pipe 300 under test, the outer tube drive assembly 540 is activated. The two ends of the outer tube drive assembly 540 are brought together in the middle, so that the clamping plate 520 moves inside the outer tube 510 toward one end of the outer tube 510. The two ends of the linkage mechanism 530 are respectively hinged to the clamping plate 520 and the outer tube 510. When the clamping plate 520 moves, it pushes one end of the linkage mechanism 530 to rotate around the other end, so that the tilt angle of the linkage mechanism 530 increases, resulting in an increase in the distance between the clamping plate 520 and the outer tube 510, thereby achieving the purpose of pushing each clamping plate 520 to clamp the outer wall of the pipe 300 under test.

[0063] Example 4

[0064] Please see Figures 1 to 8 The outer tube 510 includes: two sets of symmetrically arranged arc-shaped plates 511, the openings of the two sets of arc-shaped plates 511 being arranged opposite each other, and the two ends of the openings of the two sets of arc-shaped plates 511 being fastened by bolts; a semi-annular bottom plate 512, respectively disposed on the end wall of the two sets of arc-shaped plates 511; and the end of the outer tube drive assembly 540 away from the clamping plate 520 being connected to the inner wall of the semi-annular bottom plate 512.

[0065] In the above embodiment, the outer tube 510 is composed of two sets of symmetrically arranged arc-shaped plates 511 and a semi-circular base plate 512. The openings of the two sets of symmetrically arranged arc-shaped plates 511 are arranged opposite each other. After being fastened with bolts, the two sets of arc-shaped plates 511 cover the outer wall of the pipe under test 300. The inner ring of the semi-circular base plate 512 is spaced apart from the pipe under test 300. The semi-circular base plate 512 is used to provide an installation base for the outer tube drive assembly 540.

[0066] Example 5

[0067] Please see Figures 1 to 8The clamping plate 520 includes: a cross mounting base 521, disposed at one end of the arc-shaped plate 511 away from the semi-annular base plate 512; wherein the intersection area of ​​the cross mounting base 521 is disposed in a hole for fitting onto the outer wall of the pipe under test 300; multiple strip-shaped sliding holes 522 are provided, and the multiple strip-shaped sliding holes 522 are respectively disposed on the outer wall of each support rod of the cross mounting base 521; an L-shaped rod 523, one end of which is slidably disposed in the strip-shaped sliding hole 522, and the other end is disposed parallel to the axis of the pipe under test 300; an arc-shaped friction plate 524 is disposed on the outer wall of the L-shaped rod 523 away from the cross mounting base 521, and the curved surface of the arc-shaped friction plate is disposed facing the pipe under test 300; wherein the outer tube driving assembly 540 is connected to the cross mounting base 521 at one end away from the semi-annular base plate 512, and the outer tube driving assembly 540 is used to adjust the distance between the cross mounting base 521 and the semi-annular base plate 512.

[0068] In the above embodiment, the cross mounting base 521 consists of two symmetrically arranged V-shaped rods. The included angle ends of the two sets of V-shaped rods are brought together, and the two sets of V-shaped rods are spliced ​​together to form a cross-shaped structure. The two sets of V-shaped rods are fastened with bolts. The hole for the cross mounting base 521 to be fitted onto the pipe 300 under test is located in the connection area of ​​the two sets of V-shaped rods. The hole is formed by splicing two half-holes respectively set on the two V-shaped rods. When installing the cross mounting base 521, the two V-shaped rods with half-holes are spliced ​​together so that the two half-holes cover the outer wall of the pipe 300 under test, and the two V-shaped rods are fastened with bolts. When the outer pipe drive assembly 540 works, one end pulls the cross mounting base 521 closer to the semi-ring base plate 512, and the cross mounting base is installed. The seat 521 pushes one end of the L rod 523 to move. During the movement of the L rod 523, the distance between the L rod 523 and the semi-ring base plate 512 decreases, and the linkage mechanism 530 swings around one end of its hinged outer tube 510 mechanism, which increases the angle between the linkage mechanism 530 and the L rod 523. The linkage mechanism 530 pushes one end of the L rod 523 with the arc-shaped friction plate to move towards the outer wall of the pipe 300 being tested. The other end of the L rod 523 moves towards the outer wall of the pipe 300 being tested in the strip-shaped sliding hole 522. Through the retraction of the outer tube drive assembly 540, the purpose of driving each arc-shaped friction plate to move synchronously towards the outer wall of the pipe 300 being tested is achieved. Finally, the arc-shaped friction plates achieve the effect of clamping on the outer wall of the pipe 300 being tested.

[0069] Example 6

[0070] Please see Figures 1 to 8The outer pipe drive assembly 540 includes: a first electric telescopic rod 541, at least two sets of the first electric telescopic rod 541 are provided, and the two sets of the first electric telescopic rod 541 are spaced apart on both sides of the axis of the pipe under test 300; wherein one end of the first electric telescopic rod 541 is connected to the semi-ring base plate 512, and the other end is connected to the cross mounting seat 521.

[0071] In the above embodiments, when it is necessary to drive the arc-shaped friction plate to clamp or move away from the tested pipe 300, the first electric telescopic rod 541 is extended or retracted to achieve the effect of the cross mounting seat 521 moving closer to or away from the semi-ring base plate 512, thereby achieving the purpose of driving the arc-shaped friction plate closer to or away from the outer wall of the tested pipe 300.

[0072] Example 7

[0073] Please see Figures 1 to 8 It also includes: a roller mechanism 700, wherein multiple sets of roller mechanisms 700 are arranged in a circular array on the outer wall of the pipe under test 300, and the roller mechanism 700 is disposed between the cross mounting base 521 and the outer wall of the pipe under test 300; wherein the roller mechanism 700 includes: a plurality of mounting blocks 710, wherein the plurality of mounting blocks 710 are respectively spaced apart on the inner ring outer wall of the cross mounting base 521; and a suspension rod 720, one end of which is hinged to the mounting blocks 710. 0, the other end is inclined towards the outer wall of the pipe 300 being tested; a traveling wheel 730 is installed on the end of the suspension rod 720 away from the mounting block 710, and the outer wall of the traveling wheel 730 abuts against the outer wall of the pipe 300 being tested; a spring rod 740 is hinged at one end to the mounting block 710 and at the other end to the suspension rod 720; wherein the end of the spring rod 740 near the mounting block 710 is spaced apart from the suspension rod 720, and the other end is connected to the suspension rod 720 near the middle area.

[0074] In the above embodiment, the roller mechanism 700 is used to support the outer tube 510 and the clamping plate 520 during the movement of the clamping mechanism 500, so as to avoid the clamping plate 520 from rubbing against the outer wall of the pipe 300 under test. One end of the spring rod 740 pushes the end of the suspension rod 720 away from the mounting block 710 to always drive the walking wheel 730 to fit against the outer wall of the pipe 300 under test.

[0075] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments.

[0076] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.

Claims

1. A non-stop online monitoring device for hydrogen-blended natural gas pipelines, characterized in that, include: A magnetizing mechanism (100) and a detection mechanism (200) are symmetrically arranged along the axis of the pipe under test (300). The magnetizing mechanism (100) is used to magnetize the pipe under test (300), and the detection mechanism (200) is used to detect magnetic leakage. A rotary drive mechanism (400) is sleeved around the circumference of the pipe under test (300). The magnetizing mechanism (100) and the detection mechanism (200) are mounted on the rotary drive mechanism (400). The rotary drive mechanism (400) is used to drive the magnetizing mechanism (100) and the detection mechanism (200) to perform circular motion around the axis of the pipe under test (300). The clamping mechanisms (500) are spaced apart and are sleeved around the circumference of the pipe (300) being tested. The rotary drive mechanism (400) is located at the end of one of the clamping mechanisms (500). The telescopic mechanism (600) is connected to two sets of clamping mechanisms (500) at both ends, and the telescopic mechanism (600) is used to adjust the distance between the two sets of clamping mechanisms (500); The clamping mechanism (500) includes: Outer tube (510), clamping plate (520), linkage mechanism (530); among which The clamping plate (520) is provided in multiple sets, and the multiple sets of clamping plates (520) are arranged in a ring array on the inner wall of the outer tube (510); The outer tube (510) is sleeved around the circumference of the pipe under test (300), and each set of clamps (520) is located between the pipe under test (300) and the outer tube (510); The linkage mechanism (530) is disposed between the inner walls of each set of clamping plates (520) and the outer tube (510), and is hinged to the inner walls of the clamping plates (520) and the outer tube (510) respectively; and An outer tube drive assembly (540) is disposed inside the outer tube (510), and both ends of the outer tube drive assembly (540) are respectively connected to the clamping plate (520) and the outer tube (510); wherein The outer tube drive assembly (540) is used to drive the clamp (520) to move within the outer tube (510); The outer tube (510) includes: Two sets of symmetrically arranged arc-shaped plates (511) have openings facing each other, and the two ends of the openings of the two sets of arc-shaped plates (511) are fastened by bolts. A semi-circular bottom plate (512) is respectively disposed on the end walls of the two sets of arc-shaped plates (511); The end of the outer tube drive assembly (540) away from the clamping plate (520) is connected to the inner wall of the semi-ring bottom plate (512); The clamping plate (520) includes: A cross-shaped mounting base (521) is located at the end of the arc-shaped plate (511) away from the semi-annular base plate (512); wherein The intersection area of ​​the cross-shaped mounting base (521) is provided in the hole for fitting onto the outer wall of the pipe (300) being tested; Multiple strip-shaped sliding holes (522) are provided, and the multiple strip-shaped sliding holes (522) are respectively provided on the outer wall of each support rod of the cross mounting base (521); The L-rod (523) has one end slidably disposed within the strip-shaped sliding hole (522) on its outer wall, and the other end is disposed parallel to the axis of the pipe (300) being measured; An arc-shaped friction plate (524) is disposed on the outer wall of the end of the L-rod (523) away from the cross-shaped mounting base (521), with the curved surface of the arc-shaped friction plate facing the pipe (300) being measured; wherein The outer tube drive assembly (540) is connected to the cross mounting base (521) at the end away from the semi-ring base plate (512). The outer tube drive assembly (540) is used to adjust the distance between the cross mounting base (521) and the semi-ring base plate (512). The outer tube drive assembly (540) includes: The first electric telescopic rod (541) is provided in at least two sets, with the two sets of the first electric telescopic rod (541) spaced apart on both sides of the axis of the pipe (300) being measured; wherein One end of the first electric telescopic rod (541) is connected to the semi-ring base plate (512), and the other end is connected to the cross mounting base (521).

2. The online monitoring device for hydrogen-blended natural gas pipelines without interruption of transmission according to claim 1, characterized in that, The rotary drive mechanism (400) includes: An annular plate (410) is fitted around the circumference of the pipe (300) being tested, with its inner wall spaced apart from the outer wall of the pipe (300) being tested; A toothed ring (420) is disposed on one side of the annular plate (410) and is coaxially rotatably connected to the annular plate (410); wherein The detection mechanism (200) and the magnetizing mechanism (100) are spaced apart on the side of the toothed ring (420) away from the annular plate (410); Both the annular plate (410) and the toothed ring (420) are C-shaped, and the openings of the C-shaped toothed ring (420) and the annular plate (410) are used to enter and exit the pipe under test (300). Multiple spaced-apart drive gears (430) are located outside the gear ring (420) and mesh with the gear ring (420); wherein The drive gear (430) is rotatably mounted on the surface of the annular plate (410); A drive motor (440) is mounted on the surface of the annular plate (410), and the output shaft of the drive motor (440) is connected to one of the drive gears (430). A timing belt (450) drives the drive gears (430) connected to each of the drive gears.

3. The online monitoring device for hydrogen-blended natural gas pipelines without interruption of transmission according to claim 1, characterized in that, Also includes: Roller mechanism (700), the roller mechanism (700) is provided in multiple groups, the multiple groups of roller mechanisms (700) are arranged in a ring array on the outer wall of the pipe under test (300), the roller mechanism (700) is provided between the cross mounting base (521) and the outer wall of the pipe under test (300); in The roller mechanism (700) includes: Multiple mounting blocks (710) are provided, and the multiple mounting blocks (710) are respectively spaced apart on the outer wall of the inner ring of the cross mounting base (521); The suspension rod (720) is hinged at one end to the mounting block (710) and at the other end inclined toward the outer wall of the pipe (300) being measured; A traveling wheel (730) is installed at the end of the suspension rod (720) away from the mounting block (710), and the outer wall of the traveling wheel (730) abuts against the outer wall of the pipe (300) being measured; The spring rod (740) is hinged at one end to the mounting block (710) and at the other end to the suspension rod (720); wherein The spring rod (740) is spaced apart from the suspension rod (720) at one end near the mounting block (710), and the other end is connected to the suspension rod (720) near the middle area.

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