Magnetic flux detection device

Abstract

The utility model relates to a magnetic flux detection device, which belongs to the technical field of magnetic flux leakage detection and comprises a framework support plate, a plurality of support plate springs, a permanent magnet and a main sensing acquisition module, the framework support plate moves along a pipeline under the action of an external driving device, and the plurality of support plate springs are connected below the framework support plate in parallel at intervals. The supporting plate spring is parallel to the moving direction of the framework supporting plate, the permanent magnet is connected to the lower portion of the supporting plate spring and pulls the supporting plate spring to deform in the direction of the pipeline under the action of magnetic attraction force, and the main sensing acquisition module is fixedly connected into a groove in the side face, facing the pipeline, of the permanent magnet; the technical problem that in the prior art, when magnetization units are attached to side walls with different pipe diameters, the distances are different, and consequently the measurement precision is low can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of magnetic flux leakage detection, and particularly relates to a magnetic flux detection device. Background Art

[0002] The working principle of a magnetic flux leakage detector is that the magnetic force lines generated by a strong magnet carried by itself enter the pipe wall through coupling, generating a longitudinal magnetic circuit field on the entire circumference of the pipe wall, making the pipe wall between the magnets reach the magnetic saturation state. If there are defects in the pipe, the cross-section of the pipe wall decreases. Since the magnetic permeability of the defects in the pipe wall is much smaller than that of the ferromagnetic material itself, the magnetic resistance at the defect increases, the magnetic path becomes narrower, the magnetic force lines are deformed, and part of the magnetic force lines penetrate through both sides of the pipe wall to generate a magnetic flux leakage field. The shape of the magnetic flux leakage field depends on the geometric shape of the defect, and the magnetic flux leakage signal is detected by a probe (sensor) closely attached to the pipe wall between the two magnetic poles.

[0003] The existing patent with the publication number CN118050420A discloses an intelligent terminal for magnetic flux leakage detection of a storage tank, including a magnetization unit, a driving unit, a walking unit, a signal transmission unit, and a data acquisition unit, and further including a lifting module and a control terminal. The magnetization unit is arranged in the detection channel, the upper end of the magnetization unit is connected to the vehicle body auxiliary support, and the lower end is connected to the data acquisition unit. The vehicle body auxiliary support is arranged in the through channel of the groove, and at the same time, both sides of its upper end are respectively connected to the lifting module. The magnetization unit includes an armature, a first permanent magnet, a second permanent magnet, a first pole shoe, and a second pole shoe. The first permanent magnet and the first pole shoe are adhered together to form an integral part, and the second permanent magnet and the second pole shoe are adhered together to form an integral part. The two integral parts are adhesively connected in parallel on both sides of the lower end face of the armature.

[0004] The existing technology has the following problems:

[0005] It is realized by adjusting the lifting module. The lifting effect of the push rod is controlled by two thrust motors to lift the magnetization unit to a reasonable distance. The magnetization unit is rigidly connected by an armature, a permanent magnet, and a pole shoe. When the magnetization unit fits the side walls of different pipe diameters, the distance between the magnetization unit and the pipe wall will be different, reducing the measurement accuracy. Content of the Utility Model

[0006] The utility model provides a magnetic flux detection device, which can solve the technical problem in the existing technology that when the magnetization unit fits the side walls of different pipe diameters, the distances are different, resulting in low measurement accuracy.

[0007] In order to achieve the above purpose, the utility model is realized through the following technical solutions:

[0008] The present application provides a magnetic flux detection device, which includes a framework support plate, a plurality of support leaf springs, a permanent magnet, and a main sensing and acquisition module. The framework support plate moves along the pipeline under the action of an external driving device. A plurality of support leaf springs are connected to the lower part of the framework support plate at intervals in parallel. The support leaf springs are parallel to the moving direction of the framework support plate. The permanent magnet is connected to the lower part of the support leaf springs. The permanent magnet pulls the support leaf springs to deform towards the pipeline under the action of magnetic attraction force. The main sensing and acquisition module is fixedly connected to the side groove of the permanent magnet facing the pipeline.

[0009] Through the above technical solution, by using a plurality of deformable support leaf springs, the height of the permanent magnets at different positions can be automatically adjusted under the action of magnetic attraction force to adapt to the bending radian of the pipe wall, thereby improving the measurement accuracy.

[0010] In the present utility model, the above magnetic flux detection device further includes an adjustable guiding and supporting module. The adjustable guiding and supporting module is connected to the framework support plate. The adjustable guiding and supporting module includes a fixed block connected to the framework support plate, a supporting wheel abutted against the pipeline, and a guiding shaft connected between the fixed block and the supporting wheel. The guiding shaft can adjust the abutting angle between the supporting wheel and the pipeline.

[0011] Through the above technical solution, by using the guiding shaft to adjust the abutting angle between the supporting wheel and the pipeline, the acting force direction of the supporting wheel is perpendicular to the pipe wall, thereby improving the supporting stability.

[0012] In the present utility model, the above magnetic flux detection device further includes a mileage recording module. The mileage recording module is connected to one end of the framework support plate in the moving direction. The mileage recording module includes a mounting plate connected to the framework support plate, a mileage wheel abutted against the pipeline, and a bracket connected between the mounting plate and the mileage wheel. The bracket is connected with a mounting plate for mounting a sensor for identifying the rotation data of the mileage wheel.

[0013] Through the above technical solution, by connecting the mileage wheel with a sensor, the traveling distance of the detection device can be measured and fed back, so as to locate the detection position, thereby improving the detection accuracy and the anti-interference ability of distance data acquisition.

[0014] In the present utility model, the above framework support plate is connected with a traction plate, and the traction plate is connected with the external driving device.

[0015] Through the above technical solution, by using the traction plate to connect the external driving device, the moving mode in different detection environments can be adapted, thereby improving the adaptability of the device to different detection environments and detection objects. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Isometric view of a magnetic flux detection device provided by an embodiment of the present invention;

[0018] Figure 2 Front view of a magnetic flux detection device provided by an embodiment of the present invention;

[0019] Figure 3 Schematic diagram of the contact between the support leaf spring, permanent magnet and pipeline provided by an embodiment of the present invention;

[0020] Figure 4 Isometric view of a mileage recording module provided by an embodiment of the present invention;

[0021] Figure 5 Isometric view of an adjustable guiding and supporting module provided by an embodiment of the present invention.

[0022] Icons: 1 - Main sensing and acquisition module; 2 - Permanent magnet; 3 - Support leaf spring; 4 - Skeleton support plate; 5 - Traction plate; 6 - Mileage recording module; 601 - Mileage wheel; 602 - Sensor mounting plate; 603 - Bracket; 604 - Mounting plate; 7 - Adjustable guiding and supporting module; 701 - Support wheel; 702 - Guide shaft; 703 - Fixed block; 8 - Storage and recording module; 9 - Pipeline. Detailed implementation manners

[0023] The following will describe the embodiments of the present application in detail with reference to the drawings.

[0024] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0025] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0026] In the description of this application, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be welding, bolt connection, or riveting; it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] Embodiment:

[0028] Please refer to Figures 1-5 , Figures 1-5 which shows an embodiment of this application.

[0029] This embodiment provides a magnetic flux detection device. As shown in Figure 1 , it includes a skeleton support plate 4, several support leaf springs 3, a permanent magnet 2, and a main sensing and acquisition module 1. The skeleton support plate 4 moves along the pipeline 9 under the action of an external driving device. Several U-shaped support leaf springs 3 are parallel and spaced apart from each other and are connected to the lower part of the skeleton support plate 4 by screws. The support leaf springs 3 are parallel to the movement direction of the skeleton support plate 4. The permanent magnet 2 is connected to the lower part of the support leaf springs 3 by screws. As shown in Figure 3 , the permanent magnet 2 pulls the support leaf springs 3 to deform towards the pipeline 9 under the action of magnetic attraction force. As shown in Figure 2 , the main sensing and acquisition module 1 is fixedly connected to the side groove of the permanent magnet 2 facing the pipeline 9.

[0030] During use, an external driving device (exemplary: a self-propelled vehicle with a lifting mechanism) is used to move the magnetic flux detection device to the area where the pipeline 9 to be detected is located. Then, the magnetic flux detection device is lowered through the lifting mechanism to contact the pipe wall. Then, under the action of the magnetic attraction force between the permanent magnet 2 and the metal pipe wall, the mutually parallel support leaf springs 3 deform from the state shown in Figure 1 and Figure 2 to the state shown in Figure 3 . Then, magnetic flux leakage detection is carried out. The magnetic flux leakage signal is collected by the main sensing and acquisition module 1 and then sent to the storage and recording module 8, and then transmitted to an external analysis device for display.

[0031] It should be noted that after the lower end face of the main sensing and acquisition module 1 is adjusted to have a gap with the lower end face of the permanent magnet 2, they can be fixedly connected without the need for adjustment to prevent the main sensing and acquisition module 1 from being damaged.

[0032] Through the above technical solution, several deformable support leaf springs 3 can automatically adjust the height of the permanent magnets 2 at different positions under the action of magnetic attraction force to adapt to the bending curvature of the pipe wall, thereby improving the measurement accuracy.

[0033] As a preferred implementation mode, as Figure 1 shown, the above magnetic flux detection device further includes an adjustable guiding and supporting module 7. The adjustable guiding and supporting module 7 is screw-connected to the four corners of the skeleton support plate 4. As Figure 5 shown, the adjustable guiding and supporting module 7 includes a fixing block 703 screw-connected to the skeleton support plate 4, a supporting wheel 701 abutting against the pipe 9, and a rotatable guiding shaft 702 connected between the fixing block 703 and the supporting wheel 701 through a damping block. The guiding shaft 702 can adjust the abutting angle between the supporting wheel 701 and the pipe 9.

[0034] During use, the inclination angle of the guiding shaft 702 is pre-adjusted according to the diameter of the pipe 9. Then, after the magnetic flux detection device is lowered, the midline of the supporting wheel 701 can be parallel to the direction line of the supporting force, so as to obtain a stable supporting effect.

[0035] Through the above technical solution, the abutting angle between the supporting wheel 701 and the pipe 9 is adjusted by the guiding shaft 702, so that the acting force direction of the supporting wheel 701 is perpendicular to the pipe wall, improving the supporting stability.

[0036] As a preferred implementation mode, as Figure 1 shown, the above magnetic flux detection device further includes a mileage recording module 6. The mileage recording module 6 is screw-connected to one end of the skeleton support plate 4 in the moving direction. As Figure 4 shown, the mileage recording module 6 includes a mounting plate 604 screw-connected to the skeleton support plate 4, a mileage wheel 601 abutting against the pipe 9, and a bracket 603 connected between the mounting plate 604 and the mileage wheel 601. The bracket 603 is connected with a mounting plate 604 for installing a sensor for identifying the rotation data of the mileage wheel 601.

[0037] During use, the number of rotation circles of the mileage wheel 601 is collected by the sensor, and the moving distance of the magnetic flux detection device is calculated according to the circumference of the mileage wheel 601.

[0038] Through the above technical solution, after the mileage wheel 601 is connected with the sensor, the traveling distance of the feedback device can be measured and fed back, so as to locate the detection position, improving the detection accuracy and the anti-interference ability of distance data acquisition.

[0039] As a preferred implementation manner, as Figure 1 shown, the above-mentioned skeleton support plate 4 is connected with a traction plate 5, and the traction plate 5 is connected with an external driving device.

[0040] Through the above technical solution, the traction plate 5 is adopted to connect the external driving device to adapt to the moving modes in different detection environments, and the adaptability of the device to different detection environments and detection objects is improved.

[0041] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope recorded in the present invention can easily think of changes or substitutions, which should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claimed rights.

Claims

1. A magnetic flux detection device, characterized in that: include: The skeleton support plate (4) moves along the pipeline (9) under the action of an external driving device; A plurality of support leaf springs (3) are connected in parallel and spaced relation below the frame support plate (4), wherein the support leaf springs (3) are parallel to the movement direction of the frame support plate (4); A permanent magnet (2) is connected below the supporting leaf spring (3), and the permanent magnet (2) pulls the supporting leaf spring (3) to deform in the direction of the pipe (9) under the action of magnetic attraction; The main sensing acquisition module (1) is fixedly connected to a groove on the side of the permanent magnet (2) facing the pipeline (9).

2. The magnetic flux detection device according to claim 1, characterized in that: Also includes: An adjustable guide support module (7) is connected to the skeleton support plate (4), and the adjustable guide support module (7) comprises a fixed block (703) connected to the skeleton support plate (4), a support wheel (701) abutting against the pipe (9), and a guide shaft (702) connected between the fixed block (703) and the support wheel (701), wherein the guide shaft (702) can adjust the abutment angle between the support wheel (701) and the pipe (9).

3. The magnetic flux detection device according to claim 2, characterized in that: Also includes: A mileage recording module (6) is connected to one end of the skeleton support plate (4) in the direction of movement, and the mileage recording module (6) comprises a mounting plate (604) connected to the skeleton support plate (4), a mileage wheel (601) abutting against the pipe (9), and a bracket (603) connected between the mounting plate (604) and the mileage wheel (601), wherein the bracket (603) is connected to a mounting plate (604) for mounting a sensor for identifying rotation data of the mileage wheel (601).

4. The magnetic flux detection device according to claim 3, characterized in that: The skeleton support plate (4) is connected to a traction plate (5), and the traction plate (5) is connected to the external drive device.

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