CN215218669U - Pipeline inner wall crack detection probe - Google Patents

Abstract

The utility model discloses a pipeline inner wall crack detection probe, which comprises a probe shell, a Raymond joint, an amplifying circuit, an excitation module and a TMR magnetic sensor; the Raymond connector, the amplifying circuit, the excitation module and the TMR magnetic sensor are all fixed on the probe shell. The beneficial effects of the utility model reside in that: the detection of cracks on the inner wall of the pipeline in any direction can be realized; the array sensor is designed, and the inner wall of the pipeline can be effectively detected by single scanning; the universality is strong, and the device can adapt to different pipe diameters of pipelines; the operation is simple and the operation is easy.

Description

Pipeline inner wall crack detection probe

Technical Field

The utility model belongs to the test probe field, concretely relates to pipeline inner wall crackle test probe.

Background

The Rotating Alternating current magnetic field detection (RACFM) technology is characterized in that two groups of excitation coils are perpendicular to each other in spatial position, Alternating current with the same frequency and amplitude and 90-degree phase difference is loaded, a magnetic field with a magnetic induction vector direction Rotating at a constant speed is generated in space, uniform Alternating current Rotating at a fixed period is induced in a workpiece, induced current generates disturbance at a defect position, and a detection sensor is used for measuring a spatial magnetic field distortion signal based on the principle that the electric field disturbance causes spatial magnetic field distortion, so that the defect detection and evaluation are realized. The technology can detect surface cracks, fractures and other defects in the conductive material, does not need to pre-clean the area to be detected, and does not need to remove the protective paint layer on the surface of the workpiece in advance.

According to the working principle of the conventional ACFM, since the direction of the electric field lines is fixed, cracks running perpendicular to the electric field lines can be well detected. However, in practice, the crack direction is arbitrary, and when the included angle between the crack direction and the electric field line direction is small, the electric field disturbance caused by the defect is small. When the crack runs parallel to the current direction, the electric field is hardly deflected. When the induced electromagnetic field distortion is small, the condition of missing detection can be caused. The utility model discloses based on rotatory alternating current electromagnetic field detection technique, provide a novel pipeline inner wall crackle test probe, can satisfy the detection demand of the arbitrary direction crackle of pipeline inner wall.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pipeline inner wall crackle test probe, it can realize the detection to the crackle of the arbitrary direction of pipeline inner wall, but the BX signal and the BZ signal of simultaneous detection crackle have higher detectivity, and the detection to all crackles of pipeline inner wall can be realized to the single scanning.

The technical scheme of the utility model as follows: a pipeline inner wall crack detection probe comprises a probe shell, a Raymond joint, an amplifying circuit, an excitation module and a TMR magnetic sensor; the Raymond connector, the amplifying circuit, the excitation module and the TMR magnetic sensor are all fixed on the probe shell.

The probe shell comprises a first probe shell, a second probe shell and a third probe shell.

The first probe shell comprises a first probe shell body, a Ramo joint fixing groove is formed in the first probe shell body, and the Ramo joint is fixed through the Ramo joint fixing groove.

The second probe shell comprises a second probe shell body, an amplifying circuit is arranged on the second probe shell body and fixed, and the amplifying circuit is fixed through an amplifying circuit fixing groove.

Third probe shell include that the internal face of third probe shell main part, third probe shell main part is provided with magnetic core fixed slot and TMR magnetic sensor fixed slot, the magnetic core passes through the magnetic core fixed slot fixedly, TMR magnetic sensor passes through the TMR magnetic sensor fixed slot fixedly.

The excitation module comprises a magnetic core, a first coil and a second coil, wherein the first coil and the second coil are wound on the magnetic core, and a rotary excitation magnetic field is generated by introducing sinusoidal excitation signals with the phase difference of 90 degrees into the first coil and the second coil.

The total number of the TMR magnetic sensors is 8, the TMR magnetic sensors uniformly surround the inner wall of the third probe shell main body and are connected with the amplifying circuit.

The beneficial effects of the utility model reside in that: the detection of cracks on the inner wall of the pipeline in any direction can be realized; the array sensor is designed, and the inner wall of the pipeline can be effectively detected by single scanning; the universality is strong, and the device can adapt to different pipe diameters of pipelines; the operation is simple and the operation is easy.

Drawings

Fig. 1 is an overall schematic view of a pipeline inner wall crack detection probe in an embodiment of the present invention;

fig. 2 is a schematic view of an explosion structure of a crack detection probe for an inner wall of a pipeline according to an embodiment of the present invention;

fig. 3 is a schematic diagram of an internal structure of a first probe housing according to an embodiment of the present invention;

fig. 4 is a schematic diagram of an internal structure of a second probe housing according to an embodiment of the present invention;

fig. 5 is a schematic diagram of an internal structure of a third probe housing according to an embodiment of the present invention.

In the figure, 10 probe housing, 20 remo junction, 30 amplification circuit, 40 excitation module, 50TMR magnetic sensor, 101 first probe housing, 102 second probe housing, 103 third probe housing, 401 magnetic core, 402 first coil, 403 second coil, 1011 first probe housing body, 1012 remo junction fixation slot, 1021 second probe housing two body, 1022 amplification circuit fixation slot, 1031 third probe housing body, 1032 magnetic core fixation slot, 1033TMR magnetic sensor fixation slot.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 and 2, an embodiment of the present invention provides a probe for detecting cracks on an inner wall of a pipeline, including a probe housing 10, a remo connector 20, an amplifying circuit 30, an excitation module 40, and a TMR magnetic sensor 50. The ramo connector 20, the amplifier circuit 30, the excitation module 40 and the TMR magnetic sensor 50 are all fixed to the probe case 10 through the recess. The probe case 10 includes a disc-shaped first probe case 101, a disc-shaped second probe case 102, and a cylindrical third probe case 103.

As shown in fig. 3, the first probe case 101 includes a first probe case body 1011 in a circular sheet shape, and a circular fixing groove 1012 for a remo connector is formed in the first probe case body 1011. The remo connector 20 is fixed by a remo connector fixing groove 1012.

As shown in fig. 4, the second probe case 102 includes a second probe case main body 1021 in a sheet shape, and a square amplification circuit fixing groove 1022 is formed in the second probe case main body 1021. The amplifier circuit 30 is fixed by the amplifier circuit fixing groove 1022.

As shown in fig. 5, the third probe housing 103 includes a cylindrical third probe housing body 1031, and a magnetic core fixing groove 1032 and a TMR magnetic sensor fixing groove 1033 are provided on an inner wall surface of the third probe housing body 1031. The magnetic core 40 is fixed by a core fixing groove 1032, and the TMR magnetic sensor 50 is fixed by a TMR magnetic sensor fixing groove 1033.

The remo connector 20 connects the excitation signal and the power supply voltage of the case to the pipeline inner wall crack detection probe, and returns the detection signal of the pipeline inner wall crack detection probe to the case. The excitation module 40 includes a magnetic core 401, and a first coil 402 and a second coil 403 wound around the magnetic core 401, and generates a rotating excitation magnetic field by passing sinusoidal excitation signals with a phase difference of 90 ° through the first coil 402 and the second coil 403. The TMR magnetic sensors 50 are 8, uniformly surround the inner wall of the third probe housing body 1031, and are connected to the amplifier circuit 30, the TMR magnetic sensors 50 pick up BX signals and BZ signals, and the detected signals are transmitted to the amplifier circuit 30 for further amplification processing.

Claims (1)

1. The utility model provides a pipeline inner wall crack detection probe which characterized in that: the TMR magnetic sensor comprises a probe shell, a Raymond joint, an amplifying circuit, an excitation module and a TMR magnetic sensor; the Raymond connector, the amplifying circuit, the excitation module and the TMR magnetic sensor are all fixed on the probe shell;

the probe shell comprises a first probe shell, a second probe shell and a third probe shell;

the first probe shell comprises a first probe shell body, a Ramo joint fixing groove is formed in the first probe shell body, and the Ramo joint is fixed through the Ramo joint fixing groove;

the second probe shell comprises a second probe shell body, an amplifying circuit is arranged on the second probe shell body and fixed, and the amplifying circuit is fixed through an amplifying circuit fixing groove;

the third probe shell comprises a third probe shell body, a magnetic core fixing groove and a TMR magnetic sensor fixing groove are formed in the inner wall surface of the third probe shell body, the magnetic core is fixed through the magnetic core fixing groove, and the TMR magnetic sensor is fixed through the TMR magnetic sensor fixing groove;

the excitation module comprises a magnetic core and a first coil and a second coil which are wound on the magnetic core, and a rotary excitation magnetic field is generated by introducing sinusoidal excitation signals with the phase difference of 90 degrees into the first coil and the second coil;

the total number of the TMR magnetic sensors is 8, the TMR magnetic sensors uniformly surround the inner wall of the third probe shell main body and are connected with the amplifying circuit.

Images