In-pipeline detector probe for welding seam detection

Abstract

The utility model relates to the technical field of pipeline detection, in particular to an in-pipeline detector probe for welding seam detection, which comprises a probe shell positioned in a pipeline, a gap is reserved between the middle front part of the outer wall of the probe shell and the pipe wall, and meanwhile, the middle rear part of the probe shell is contacted with the pipe wall. The technical effect that the probe shell walks along the pipe wall in an attached mode is achieved, the gap is used for preventing the front end of the probe shell from colliding with a welding seam protruding out of the pipe wall, a welding seam detection sensor is installed on the front middle portion of the probe shell, and non-contact detection is conducted on the pipeline welding seam through the welding seam detection sensor. The gap is reserved between the middle front part of the probe shell and the pipe wall, so that the influence on the detection of the welding seam detection sensor due to violent vibration of the probe shell caused by collision when the welding seam detection sensor is close to the welding seam can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline detection, in particular to an in-pipe detector probe for weld detection. Background Art

[0002] During the operation of pipelines, various defects may occur due to corrosion, geological movement, mechanical damage, self-defects, etc. These defects will have an adverse impact on the safe operation of pipelines, and it is necessary to regularly use in-pipe detectors to conduct on-line detection of pipelines. Due to the serious consequences of weld defects in pipelines and the great potential safety hazards, they pose a great threat to pipeline operation. Weld defect detection is the key point of in-pipe detection.

[0003] As the component of the in-pipe detector that actually picks up defect signals, the working state of the in-pipe detector probe directly affects the quality of defect signal pickup and is an important part of the in-pipe detector. At present, the existing in-pipe detector probes basically adopt a sliding design. The whole probe contacts the pipe wall surface, and the sensor is installed near the part where the probe contacts the pipe wall surface, as Figure 1 shown. The probe slides on the pipe wall surface driven by the forward movement of the in-pipe detector, and picks up detection signals at the same time. Due to the presence of weld reinforcement at the weld part, during the process of the probe closely adhering to the pipe wall and sliding, the probe housing will contact and collide with the weld reinforcement part at the weld, causing the probe to vibrate violently, twist or even lift off the ground. Due to the limitations of the above existing design, before the moment of the above collision, the sensor has not reached the weld, and the weld detection signal cannot be picked up. When the sensor reaches the weld position, the abnormal states such as vibration, torsion and lifting off the ground of the probe caused by the collision have not been eliminated, resulting in the sensor being unable to stably and effectively pick up the weld detection signal, which has an adverse impact on weld detection. Content of the Utility Model

[0004] The utility model aims to at least solve the problem that the probe of the in-pipe detector in the prior art contacts and collides with the weld reinforcement part at the weld, resulting in the sensor being unable to stably and effectively pick up the weld detection signal, thus having an adverse impact on weld detection.

[0005] The present solution provides an in-pipe detector probe for weld detection, which is achieved by the following specific technical means: including a probe housing located inside the pipeline, there is a gap between the middle front part of the outer wall of the probe housing and the pipe wall, and at the same time, the middle rear part of the probe housing contacts the pipe wall. A weld detection sensor is installed on the middle front part of the probe housing, and the pipeline weld is detected non-contact by the weld detection sensor. Since there is a gap between the middle front part of the probe housing and the pipe wall, and the width of the gap is greater than the weld protrusion height, it is possible to avoid the probe housing vibrating violently due to collision when the weld detection sensor approaches the weld.

[0006] Preferred Technical Solution 1: A pipe wall detection sensor is installed in the middle and rear part of the probe housing. By using the pipe wall detection sensor, the detection of the pipe wall can be achieved while the pipeline weld is detected.

[0007] Preferred Technical Solution 2: A wear-resistant body for the contact part is fixed to the middle and rear part of the outer wall of the probe housing, and the wear-resistant body for the contact part contacts the pipe wall.

[0008] Preferred Technical Solution 3: A wear-resistant body for the suspended part is fixed to the middle and front part of the outer wall of the probe housing, and a gap is left between the wear-resistant body for the suspended part and the pipe wall.

[0009] Preferred Technical Solution 4: The surface of the probe housing is sprayed or welded with wear-resistant materials. By spraying or welding wear-resistant materials on the surface of the probe housing, the wear resistance of the probe housing can be increased.

[0010] Preferred Technical Solution 5: The probe housing is connected to the carrier inside the pipeline through a probe support mechanism, and the movement of the carrier inside the pipeline drives the probe housing to move forward along the pipe wall.

[0011] Adopting the above structure makes this solution have the following beneficial effects:

[0012] 1. The front part of the probe housing is suspended from the surface of the pipe wall, and the rear part contacts the surface of the pipe wall. The weld detection sensor is installed in the suspended part between the front part of the probe housing and the surface of the pipe wall, realizing that the weld detection sensor passes over the weld from above and picks up the weld detection signal before the probe housing collides with the weld, solving the adverse effect of the collision between the probe housing and the weld on the weld detection.

[0013] 2. By using the wear-resistant body for the contact part, the wear-resistant body for the suspended part, and spraying or welding wear-resistant materials, the wear resistance of the probe housing is improved, which can effectively protect the probe housing and the sensors inside the probe housing, and improve the service life of the probe.

[0014] 3. By using the probe support mechanism, the probe is kept parallel to the internal detector, which is beneficial to ensuring the stability of the relative position and posture between the probe and the surface of the pipe wall, and helps to improve the quality of the detection signal.

[0015] 4. By using the pipe wall detection sensor installed in the probe housing in combination, the detection of the pipe wall can be achieved while the pipeline weld is detected, which helps to reduce the number of transmissions of the internal detector, shorten the project cycle, and save project costs. Description of the Drawings

[0016] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0017] Figure 1 It is a schematic diagram of the structure of the existing in-pipe detector probe;

[0018] Figure 2 It is a schematic diagram of the overall structure of this solution;

[0019] Figure 3 It is a schematic diagram of the structure of the probe housing of this solution.

[0020] Among them, 1. Pipe wall; 2. Weld; 3. Probe housing; 4. Probe support mechanism; 5. Wear-resistant body at the suspended part; 6. Weld detection sensor; 7. Wear-resistant body at the contact part; 8. Pipe wall detection sensor. Specific implementation mode

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention.

[0022] Please refer to Figures 2 - 3 , the in-pipe detector probe for weld detection includes a probe housing 3 located inside the pipe. There is a gap between the middle front part of the outer wall of the probe housing 3 and the pipe wall 1, and at the same time, the middle rear part of the probe housing 3 is in contact with the pipe wall 1. The setting of the gap is used to prevent the front end of the probe housing 3 from colliding with the protruding weld 2 on the pipe wall. A weld detection sensor 6 is installed on the middle front part of the probe housing 3. The weld detection sensor 6 is a magnetic sensor, electromagnetic sensor, eddy current sensor or ultrasonic sensor. The pipe weld is non-contact detected through the weld detection sensor 6. Since there is a gap between the middle front part of the probe housing 3 and the pipe wall 1, it is possible to prevent the probe housing 3 from vibrating violently when the weld detection sensor 6 approaches the weld 2, which affects the detection of the weld detection sensor 6;

[0023] A pipe wall detection sensor 8 is installed at the middle rear part of the probe housing 3. By using the pipe wall detection sensor 8, the detection of the pipe wall 1 can be realized while the detection of the pipe weld 2 is completed, which helps to reduce the number of times the in-pipe detector is sent, shorten the project cycle and save project costs. The pipe wall detection sensor 8 is a magnetic sensor, electromagnetic sensor, eddy current sensor or ultrasonic sensor.

[0024] Please refer to Figures 2 - 3, A pipeline internal detector probe for weld detection. A wear-resistant body 7 for the contact part is fixed at the middle and rear part of the outer wall of the probe housing 3. The wear-resistant body 7 for the contact part contacts the pipe wall 1. By using the wear-resistant body 7 for the contact part of the probe, the wear resistance of the probe housing 3 can be increased, and the service life of the probe housing 3 can be improved. Preferably, the material of the wear-resistant body 7 for the contact part is ceramic, carbide, nitride or wear-resistant steel. A wear-resistant body 5 for the suspended part is fixed at the middle and front part of the outer wall of the probe housing 3. There is a gap between the wear-resistant body 5 for the suspended part and the pipe wall 1. By using the wear-resistant body 5 for the suspended part, it is possible to prevent wear of the probe housing 3 caused by pipe accessories, welds with excessive reinforcement, abnormal protrusions, etc. inside the pipeline, and improve the service life of the probe housing 3.

[0025] Please refer to Figures 2 - 3 , A pipeline internal detector probe for weld detection. The surface of the probe housing 3 is sprayed or welded with wear-resistant material. By spraying or welding wear-resistant material on the surface of the probe housing 3, the wear resistance of the probe housing 3 can be increased, the wear of the probe housing 3 caused by dirt, etc. inside the pipeline can be alleviated, and the service life of the probe can be improved.

[0026] Please refer to Figures 2 - 3 , A pipeline internal detector probe for weld detection. The probe housing 3 is connected to a carrier (prior art) inside the pipeline through a probe support mechanism 4. The carrier moves inside the pipeline to drive the probe housing 3 to move forward along the pipe wall. The probe support mechanism 4 is of a parallelogram structure. The probe housing 3 is fixed on the top side of the probe support mechanism 4, and at the same time, the bottom side of the probe support mechanism 4 is fixed on the carrier. By using the parallelogram probe support mechanism 4, the probe housing 3 is kept parallel to the carrier, which is conducive to ensuring the stability of the relative position and attitude between the probe housing 3 and the surface of the pipe wall 1, helps to improve the detection signal quality, and the upper and lower ends of the two sides of the probe support mechanism 4 are respectively hinged to the top side and the bottom side, and an elastic member is connected between the side and the top side and the bottom side, such as a torsion spring connected between the end of the side and the top plate and the bottom plate. The setting of the elastic member ensures that the elastic support mechanism presses the probe housing 3 against the pipe wall 1.

[0027] Specific usage process: When the carrier runs forward inside the pipeline, it drives the probe housing 3 installed on the probe support mechanism 4 to slide forward along the pipe wall. During the running process, the probe housing 3 contacts the pipe wall through the wear-resistant body 7 for the contact part to prevent the probe housing 3 from being worn. The wear-resistant body 5 for the suspended part does not contact the pipe wall 1 during normal operation. When encountering pipe accessories, welds with excessive reinforcement, abnormal protrusions inside the pipeline, it can protect the probe housing 3 and prevent the probe housing 3 from being worn, improving the service life of the probe housing 3. As the internal detector runs forward, when the weld 2 on the pipe wall moves near the suspended part between the probe housing 3 and the pipe wall 1, such as Figure 3As shown, the weld detection sensor 6 installed at the suspended part can pick up the detection signal of the weld 2. After the weld detection sensor 6 passes over the weld, the weld 2 contacts and collides with the probe housing 3. At this time, the weld detection sensor 6 has completed the signal pickup of the weld 2, and the collision will not affect the detection of the weld 2. Along with the operation of the carrier, while the weld 2 is being detected, the pipe wall detection sensor 8 installed in the probe housing 3 can detect the pipe wall 1. The signals detected by the weld detection sensor 6 and the pipe wall detection sensor 8 are transmitted to the external signal receiving end.

[0028] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An in-pipe detector probe for weld detection, characterized in that: It includes a probe housing (3) located inside the pipeline. There is a gap between the middle front part of the outer wall of the probe housing (3) and the pipe wall (1), while the middle rear part of the probe housing (3) is in contact with the pipe wall (1). A weld detection sensor (6) is installed on the middle front part of the probe housing (3), and the pipeline weld (2) is non-contact detected by the weld detection sensor (6).

2. The in-pipe detector probe for weld seam detection according to claim 1, characterized in that: A pipe wall detection sensor (8) is installed on the middle rear part of the probe housing (3) for detecting the pipe wall.

3. The in-pipe detector probe for weld seam detection according to claim 1, wherein: A contact part wear-resistant body (7) is fixed on the middle rear part of the outer wall of the probe housing (3), and the contact part wear-resistant body (7) is in contact with the pipe wall (1).

4. The pipeline internal detector probe for weld detection according to claim 1, characterized in that: A suspended part wear-resistant body (5) is fixed on the middle front part of the outer wall of the probe housing (3), and there is a gap between the suspended part wear-resistant body (5) and the pipe wall (1).

5. The in-pipe detector probe for weld seam detection according to claim 3, characterized in that: The material of the contact part wear-resistant body (7) is ceramic, carbide, nitride or wear-resistant steel.

6. The in-pipe detector probe for weld seam detection according to claim 1, wherein: The surface of the probe housing (3) is sprayed or spray-welded with wear-resistant material.

7. The pipeline internal detector probe for weld seam detection according to claim 1, wherein: The probe housing (3) is connected to the carrier inside the pipeline through a probe support mechanism (4), and the probe support mechanism (4) is a parallelogram structure.

8. The in-pipe detector probe for weld detection according to claim 1, wherein: The weld detection sensor (6) is a magnetic sensor, electromagnetic sensor, eddy current sensor or ultrasonic sensor.

9. The pipeline internal detector probe for weld seam detection according to claim 2, characterized in that: The pipe wall detection sensor (8) is a magnetic sensor, electromagnetic sensor, eddy current sensor or ultrasonic sensor.

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