Probe diameter adjustable mechanism applied to port reducing pipeline inner wall eddy current detection

Abstract

The probe diameter adjustable mechanism comprises a supporting rod, a sliding ring and a plurality of stretching assemblies, the sliding ring is arranged on the supporting rod in a sleeved mode and connected with the supporting rod in a sliding mode, the stretching assemblies are evenly distributed on the periphery of the supporting rod in the circumferential direction, and each stretching assembly comprises a swing arm, a connecting rod and an eddy current probe. One end of the swing arm is hinged to the head of the supporting rod, one end of the connecting rod is hinged to the middle of the swing arm, and the eddy current probe is hinged to the other end of the swing arm. According to the probe diameter adjustable mechanism applied to eddy current detection on the inner wall of the pipeline with the reduced port, the technical problem of how to carry out eddy current detection on the inner wall of a container with the reduced port is solved, the probe can pass through the port, the probe can be manually adjusted and unfolded after entering the cavity, the unfolding amplitude is flexible, and the probe diameter adjustable mechanism can adapt to different inner diameter requirements.

Description

Technical Field

[0001] The utility model relates to the field of eddy current detection, in particular to a probe diameter adjustable mechanism used for eddy current detection of the inner wall of a pipe with a reduced port diameter. Background Art

[0002] For some containers, the port is significantly smaller than the diameter of the normal cavity. For safety reasons, the inner wall of such containers needs to be tested by eddy current testing. For eddy current testing, the probe must be able to be close to or fit the surface of the product being tested. In order to enter the cavity, the diameter of the probe cannot exceed the port, such as Figure 1 As shown, after the conventional probe structure enters the cavity, it cannot perform detection because the probe is too far away from the inner wall of the cavity. Utility Model Content

[0003] In order to solve the technical problems existing in the prior art, the utility model provides a probe diameter adjustable mechanism for eddy current detection on the inner wall of a pipe with a reduced port diameter, so that when eddy current detection is performed on the inner wall of a container or pipe with a reduced port diameter, the probe can be inserted from the port and stretched to fit the inner wall of the container for detection.

[0004] In order to achieve the above object, the technical solution of the utility model is as follows:

[0005] A probe diameter-adjustable mechanism for eddy current detection on the inner wall of a pipe with a reduced port diameter comprises a support rod, a slip ring and several extension components. The slip ring is sleeved on the support rod and is slidably connected to the support rod. The extension components are evenly distributed around the support rod in the circumferential direction. The extension component comprises a swing arm, a connecting rod and an eddy current probe. One end of the swing arm is hinged to the head of the support rod, one end of the connecting rod is hinged to the middle of the swing arm, and the eddy current probe is hinged to the other end of the swing arm.

[0006] As a preferred technical solution, the slider slides to different positions, and the connecting rod drives the swing arm to open to different angles.

[0007] As a preferred technical solution, during testing, after the extension component enters the pipe cavity, it is unfolded until the eddy current probe fits against the inner wall of the cavity being tested.

[0008] As a preferred technical solution, during eddy current testing, the distance between the eddy current probe and the inner surface of the cavity being tested does not exceed 2 mm.

[0009] As a preferred technical solution, the probe diameter adjustable mechanism is umbrella-shaped as a whole.

[0010] As a preferred technical solution, the probe diameter adjustable mechanism further includes a probe cable, and the eddy current probe is connected to a power source outside the pipeline via the probe cable.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The utility model provides a probe diameter adjustable mechanism for eddy current detection on the inner wall of a pipe with a reduced port diameter, which solves the technical problem of how to perform eddy current detection on the inner wall of a container with a reduced port diameter. The probe can pass through the port and can be manually adjusted and expanded after entering the cavity. The expansion range is flexible and can adapt to different inner diameter requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of a conventional probe extending into a cavity.

[0014] Figure 2 This is a schematic structural diagram of a probe diameter adjustable mechanism for eddy current detection of the inner wall of a pipe with a reduced port diameter according to the present invention;

[0015] Figure 3 The utility model is a schematic diagram of the expanded state of the probe diameter adjustable mechanism used for eddy current detection of the inner wall of a pipe with a reduced port diameter.

[0016] In the figure: 1. Support rod; 2. Slip ring; 3. Swing arm; 4. Connecting rod; 5. Eddy current probe; 61. Cavity; 62. Container port. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further described below in conjunction with specific embodiments:

[0018] like Figure 2 As shown, a probe diameter adjustable mechanism for eddy current detection of the inner wall of a pipe with a reduced diameter at a port is provided. The overall structure is umbrella-shaped, including a support rod 1, a slip ring 2 and several extension components. The slip ring 2 is sleeved on the support rod 1 and is slidably connected to the support rod 1. Figure 3 As shown, the extension assembly is evenly distributed around the support rod 1. The extension assembly includes a swing arm 3, a connecting rod 4 and an eddy current probe 5. One end of the swing arm 3 is hinged to the head of the support rod 1, one end of the connecting rod 4 is hinged to the middle of the swing arm 3, and the eddy current probe 5 is hinged to the other end of the swing arm 3.

[0019] By sliding the slider to different positions, the connecting rod 4 drives the swing arm 3 to open to different angles, so that the eddy current probe 5 fits the inner wall of the measured cavity 61. The distance between the eddy current probe 5 and the inner surface of the measured cavity 61 does not exceed 2mm.

[0020] The probe diameter adjustable mechanism further includes a probe cable, and the eddy current probe 5 is connected to a power source outside the pipeline via the probe cable to supply power to the eddy current probe 5 .

[0021] During testing, the head of the support rod 1 and the extension assembly are first inserted into the container or pipe cavity 61 with a reduced diameter at the port. The slider is then pushed forward, causing the swing arm 3 to open via the connecting rod 4 until the eddy current probe 5 is in contact with the inner surface of the cavity 61 being tested. Testing can then be performed. Once the test is complete, the slider is pulled backward, causing the connecting rod 4 to retract the swing arm 3, and the entire mechanism can then be removed.

[0022] This embodiment is only a further explanation of the invention and is not a limitation of the invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed, but as long as they are within the scope of the claims of the invention, they are protected by patent law.

Claims

1. A probe diameter adjustable mechanism for eddy current detection of the inner wall of a pipe with a reduced port diameter, characterized in that: It includes a support rod, a slip ring and several extension components. The slip ring is sleeved on the support rod and is slidably connected to the support rod. The extension components are evenly distributed around the support rod. The extension component includes a swing arm, a connecting rod and an eddy current probe. One end of the swing arm is hinged to the head of the support rod, one end of the connecting rod is hinged to the middle of the swing arm, and the eddy current probe is hinged to the other end of the swing arm.

2. The probe diameter adjustable mechanism for eddy current detection of the inner wall of a pipe with a reduced port diameter according to claim 1 is characterized in that: The slider slides to different positions, and the connecting rod drives the swing arm to open to different angles.

3. The probe diameter adjustable mechanism for eddy current detection of the inner wall of a pipe with a reduced port diameter according to claim 1, characterized in that: During testing, the extension component enters the pipe cavity and is unfolded until the eddy current probe fits against the inner wall of the cavity being tested.

4. The probe diameter adjustable mechanism for eddy current detection of the inner wall of a pipe with a reduced port diameter according to claim 3 is characterized in that: During eddy current testing, the distance between the eddy current probe and the inner surface of the cavity being tested does not exceed 2 mm.

5. The probe diameter adjustable mechanism for eddy current detection of the inner wall of a pipe with a reduced port according to claim 1, characterized in that: The probe diameter adjustable mechanism is umbrella-shaped as a whole.

6. The probe diameter adjustable mechanism for eddy current detection of the inner wall of a pipe with a reduced port according to claim 1, characterized in that: The probe diameter adjustable mechanism further includes a probe cable, and the eddy current probe is connected to a power source outside the pipeline via the probe cable.

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