Magnetic saturation device for eddy current detection of railway vehicle bogie

Abstract

The utility model relates to a magnetic saturation device for eddy current detection of a railway vehicle bogie, which comprises a shell, two magnets are arranged in the shell and are used for forming a magnetic field in a ferromagnetic material workpiece to carry out magnetic saturation on the workpiece; the eddy current probe penetrates through the shell, is arranged between the two magnets and is used for detecting deep eddy current of a welding seam of the railway vehicle bogie; four moving wheels are arranged below the shell, universal wheel bases are arranged at the left end and the right end of the shell, the universal wheel bases are fixed to the shell through screws, and each universal wheel base is provided with a universal wheel. The magnetic saturation device for eddy current detection of the railway vehicle bogie is small in size, flexible in operation, suitable for being operated in a narrow space, and capable of effectively detecting the internal quality of a non-depainting welding seam of the railway vehicle bogie.

Description

Technical Field

[0001] The utility model relates to the technical field of rail vehicle detection, and particularly relates to a magnetic saturation device for eddy current detection of a rail vehicle bogie. Background Art

[0002] The bogie of a rail vehicle is a key load-bearing structure for the operation of rail transit vehicles. The use of bogies on vehicles is to increase the load capacity, length and volume of the vehicle, and improve the train operation speed to meet the needs of the development of railway transportation. Ensure that under normal operating conditions, the car body can be reliably located on the bogie, and the rolling of the wheels along the rails is converted into the translation of the car body along the line through the bearing device. The bogie is an independent component of the vehicle, and the number of connecting parts between the bogie and the car body is reduced as much as possible. The bogie is used to support the car body, bear and transmit various loads and forces between the car body and the wheels or between the wheel-rail and the car body, and evenly distribute the axle load. The structure of the bogie should facilitate the installation of the spring damping device, so that it has good damping characteristics to alleviate the interaction between the vehicle and the line, reduce vibration and impact, reduce dynamic stress, and improve the running stability and safety of the vehicle.

[0003] The bogie frame and its parts are made of medium and heavy plate low alloy steel. Ferromagnetic materials have a large magnetic permeability, and the magnetic domain structure of ferromagnetic materials will cause great interference to the eddy current detection signal, which results in that the conventional eddy current detection technology is only limited to the detection of surface defects of the welds of the rail vehicle bogie. Content of the Utility Model

[0004] The utility model aims to solve the technical problems in the prior art and provides a magnetic saturation device for eddy current detection of a rail vehicle bogie.

[0005] To solve the above technical problems, the technical solution of the utility model is specifically as follows:

[0006] A magnetic saturation device for eddy current detection of a rail vehicle bogie includes: a housing, and 2 magnets are arranged inside the housing. Among them, the N pole of one magnet faces outward, and the S pole of the other magnet faces outward; the 2 magnets are used to form a magnetic field inside the ferromagnetic material workpiece to magnetically saturate the workpiece;

[0007] An eddy current probe is arranged between the 2 magnets through the housing and is used for deep eddy current detection of the weld of the rail vehicle bogie;

[0008] 4 moving wheels are arranged under the housing, and universal wheel bases are arranged at both the left end and the right end of the housing. The universal wheel bases are fixed on the housing by screws, and universal wheels are respectively arranged on each universal wheel base, and the height of the universal wheels is adjusted by screws;

[0009] When it is necessary to move back and forth on the workpiece to be inspected, the caster wheels are adjusted upward and retracted, and the moving wheels are used to move back and forth; when it is necessary to move left and right on the workpiece to be inspected, the caster wheels are adjusted downward to exceed the moving wheels, and the caster wheels are used to move left and right.

[0010] In the above technical solution, the edges of the housing are all arranged in a groove shape.

[0011] In the above technical solution, screw holes for adjusting the height of the eddy current probe are respectively arranged on the left and right of the housing.

[0012] In the above technical solution, the number of caster wheel bases is 2, and one is respectively arranged at the left end and the right end of the housing.

[0013] In the above technical solution, the magnet is fixed to the housing with screws through the threaded holes provided at the ends.

[0014] The utility model has the following beneficial effects:

[0015] The magnetic saturation device for eddy current detection of the bogie of a rail vehicle of the utility model, by setting the moving wheels, magnets, caster wheel bases and caster wheels, enables the magnetic saturation device to detect subcutaneous defects in addition to surface defects when detecting the welds of the bogie of a rail vehicle without paint removal, can move in all directions, is small in size and flexible in operation, is suitable for operation in narrow spaces, and can effectively monitor the weld quality of the in-service bogie of a rail vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following further describes the utility model in detail with reference to the drawings and specific embodiments.

[0017] Figure 1 FIG. is a schematic structural diagram of the magnetic saturation device for eddy current detection of the bogie of a rail vehicle of the utility model.

[0018] Figure 2 FIG. is a schematic structural diagram of the magnetic saturation device for eddy current detection of the bogie of a rail vehicle of the utility model from another angle.

[0019] The reference numerals in the drawings are represented as:

[0020] 1 - housing; 2 - moving wheel; 3 - caster wheel; 4 - magnet; 5 - caster wheel base. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The technical solutions of the utility model will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the utility model without creative efforts shall fall within the protection scope of the utility model.

[0022] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "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 utility model 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. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. The following further describes the present utility model in detail with reference to the drawings.

[0023] The magnetic saturation device for eddy current detection of a railway vehicle bogie of the present utility model is applicable to the non - paint - stripping deep - layer eddy current detection of the welds of a railway vehicle bogie, enabling ferromagnetic materials after magnetic saturation treatment to be treated as non - ferromagnetic materials, realizing the non - paint - stripping depth detection of the welds of a railway vehicle bogie, and effectively detecting internal defects in the welds of the bogie.

[0024] As Figure 1 and Figure 2 shown, the magnetic saturation device for eddy current detection of a railway vehicle bogie of the present utility model includes: a housing 1, and there are 2 magnets 4 arranged inside the housing 1. The 2 magnets 4 are respectively N52 permanent magnets; among them, the N - pole of one magnet 4 faces outward, and the S - pole of the other magnet 4 faces outward; the 2 magnets 4 are used to form a magnetic field inside the ferromagnetic material workpiece to magnetically saturate the workpiece; an eddy current probe is arranged through the housing 1 between the 2 magnets 4 and is used for deep - layer eddy current detection of the welds of a railway vehicle bogie; threaded holes are respectively arranged at the end parts of each magnet 4 to be fixed on the housing 1 by screws; at the lower part of the housing 1, a total of 4 moving wheels 2 are arranged at the front end and the rear end. The magnetic saturation device can move back and forth on the workpiece to be inspected through the moving wheels 2; at both the left end and the right end of the housing 1, there is respectively 1 universal wheel base 5, and 2 universal wheels 3 are arranged on each universal wheel base 5. The magnetic saturation device can move left and right on the workpiece to be inspected through the universal wheels 3;

[0025] Screw holes are respectively arranged on both sides of the housing 1 to adjust the height of the eddy current probe. When detecting a flat weld, the eddy current probe is adjusted to a flat state for detection; when detecting a weld with a reinforcement, the eddy current probe is adjusted upward to the surface of the weld to overcome the influence of the weld reinforcement.

[0026] The edges of the housing 1 are all arranged in a groove shape to avoid the influence of the weld reinforcement and realize eddy current detection of internal defects in the weld.

[0027] When the magnetic saturation device for eddy current detection of railway vehicle bogies of the present utility model is in use, the eddy current probe is clamped between two magnets 4 inside the housing 1. The magnetic saturation device can move in all directions through the moving wheels 2 and the universal wheels 3. The two magnets 4 perform magnetic saturation on the welds of the railway vehicle bogies, and can detect the subcutaneous defects of the weld depth in addition to the surface defects. It is small in volume and flexible in operation, and is particularly suitable for the internal quality detection of the welds of in-service railway vehicle bogies without paint stripping.

[0028] The magnetic saturation device for eddy current detection of railway vehicle bogies of the present utility model is small in volume and flexible in operation, suitable for operation in narrow spaces, and can effectively detect the internal quality of the non-paint-stripped welds of railway vehicle bogies.

[0029] The magnetic saturation device for eddy current detection of railway vehicle bogies of the present utility model, by setting the moving wheels, magnets, universal wheel bases, and universal wheels, enables the magnetic saturation device to detect subcutaneous defects in addition to surface defects when detecting the non-paint-stripped welds of railway vehicle bogies, can move in all directions, is small in volume and flexible in operation, suitable for operation in narrow spaces, and can effectively monitor the weld quality of in-service railway vehicle bogies.

[0030] Obviously, the above embodiments are only examples given for clear illustration, and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A magnetic saturation device for eddy current inspection of railway vehicle bogies, characterized in that: It includes: a housing (1), and there are 2 magnets (4) inside the housing (1). Among them, the N pole of one magnet (4) faces outward, and the S pole of the other magnet (4) faces outward; the 2 magnets (4) are used to form a magnetic field inside the ferromagnetic material workpiece to magnetically saturate the workpiece; The eddy current probe is arranged between the 2 magnets (4) through the housing (1) and is used for deep eddy current inspection of the welds of railway vehicle bogies; There are 4 moving wheels (2) arranged under the housing (1), and universal wheel bases (5) are arranged at both the left end and the right end of the housing (1). The universal wheel bases (5) are fixed to the housing (1) by screws, and universal wheels (3) are respectively arranged on each universal wheel base (5), and the height of the universal wheels (3) is adjusted by screws; When it is necessary to move back and forth on the workpiece to be inspected, the universal wheels (3) are adjusted upward to retract, and the moving wheels (2) are used to move back and forth; when it is necessary to move left and right on the workpiece to be inspected, the universal wheels (3) are adjusted downward to exceed the moving wheels, and the universal wheels (3) are used to move left and right.

2. The magnetic saturation device for eddy current detection of a railway vehicle bogie according to claim 1, characterized in that, The edges of the housing (1) are all arranged in a groove shape.

3. The magnetic saturation device for eddy current detection of a bogie of a rail vehicle according to claim 1, characterized in that, Screw holes for adjusting the height of the eddy current probe are respectively arranged on the left and right of the housing (1).

4. The magnetic saturation device for eddy current detection of a railway vehicle bogie according to claim 1, characterized in that, The number of the universal wheel bases (5) is 2, and 1 is respectively arranged at the left end and the right end of the housing (1).

5. The magnetic saturation device for eddy current detection of a railway vehicle bogie according to claim 1, characterized in that, The magnet (4) is fixed to the housing (1) by screws through the threaded holes arranged at the ends.

Images