Pulsed eddy current probe fixing device for coating layer pipeline detection

Abstract

The utility model relates to the technical field of pipeline detection, and particularly discloses a pulsed eddy current probe fixing device aiming at coating layer pipeline detection. The fixing device comprises a probe, a probe rod, a sliding piece, a nut, an arch bridge, a connecting rod and a clamping rod. Wherein one end of the probe rod fixes the probe to fit a pipeline coating layer, the other end of the probe rod is arranged on the arch bridge through the sliding piece and the nut, the two connecting rods with the groove ends are connected and fixed to the two ends of the arch bridge, and the other ends of the connecting rods are connected with the clamping rods. The other end of the clamping rod is arranged to be in a cambered surface shape and attached to the pipeline wrapping layer face. According to the device, double detection of a vertical coating layer pipeline and a circumferential pipeline by the pulsed eddy current probe can be realized by adjusting a probe sliding rod, an arch bridge, a connecting rod and a clamping rod component; the fixing device is reasonable in design, does not need to dismantle a pipeline coating layer, is not influenced by the lift-off effect, realizes online detection without shutdown, and is high in detection efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline detection technical field, specifically disclose a kind of pulse eddy current probe fixing device for cladding pipeline detection. BACKGROUND

[0002] The metal pressure pipeline under cladding is widely used in chemical industry, petroleum, gas and other industries, and its internal environment is usually high temperature, high pressure and corrosion, which can easily cause cracks, corrosion cracking and perforation defects at the welding seam of the pipeline, threatening the production safety of industry. Therefore, effective detection of complex defects (thinning caused by corrosion and external force, and crack coexistence defects) of the pipeline is necessary. The detection techniques for certain size defects formed in the pressure pipeline mainly include ultrasonic detection, ray detection, magnetic powder detection, penetration detection, magnetic flux leakage detection, eddy current detection, ultrasonic guided wave detection and magnetic memory detection. Each of these detection methods has advantages and disadvantages. Among them, pulse eddy current, as a new non-destructive testing technology, uses a square wave excitation with a certain duty cycle to excite the excitation coil. Because the square wave contains rich frequency components, the detection signal contains more information about the test piece. It has strong detection penetration, wide range, strong ability and fast speed. Therefore, pulse eddy current has unique advantages for pipeline detection under cladding.

[0003] However, the conventional pulse eddy current probe detection device limits the omnidirectional detection of the cladding pipeline, and the contact between the pulse eddy current probe and the test piece is unstable, resulting in inaccurate detection results. Therefore, it is necessary to provide a detection device to solve the problems existing in the conventional pulse eddy current probe detection. UTILITY MODEL CONTENT

[0004] The utility model adopts the following technical solutions:

[0005] The utility model discloses a kind of pulse eddy current probe fixing device for cladding pipeline detection, including probe, probe rod, sliding sheet, arch bridge, connecting rod, clamping rod;

[0006] The arch bridge is arc strip plate, and the center of arch bridge plate surface is provided with strip through groove;

[0007] The probe is fixed at one end of the probe rod, and the other end of the probe rod is connected to the arch bridge after passing through the arch bridge through groove and the sliding sheet;Sliding sheet is clamped outside arch bridge through groove, and is used to guide the sliding of probe rod along through groove;

[0008] The clamping rod is symmetrically arranged at the side of the two end points of the arch bridge, and is located on the same torus with the arch bridge;One end of the clamping rod is arc surface, and is attached to the cladding surface of the pipeline;

[0009] One end of the connecting rod is connected to the end point of the arch bridge, and the other end is fixedly connected with the rod body of the clamping rod.

[0010] Preferably, the probe rod has threads on its body, and the nut cooperates with the rod body to press against the sliding plate, thereby locking the sliding plate in the axial direction of the probe rod.

[0011] Preferably, one end of the connecting rod has a through hole for clamping the rod to pass through, and the other end has a square groove for connecting to the end of the arch bridge.

[0012] Furthermore, the clamping rod has threads on its circumference, and is fixed and positioned at different positions by a nut to accommodate different pipe diameters.

[0013] Furthermore, the arch bridge end is provided with a protrusion that mates with a square groove.

[0014] Preferably, the probe and probe rod are assembled concentrically; different types of probes can be replaced according to actual testing needs.

[0015] Preferably, the sliding plate and the arch bridge have the same curvature.

[0016] Preferably, the curvature of the arch bridge is less than the curvature of the pipe cladding layer.

[0017] Preferably, the pipe is provided on the inner side of the pipe covering layer.

[0018] The beneficial effects of this utility model are:

[0019] This utility model employs a pulsed eddy current probe fixing device for coated pipeline inspection. Through the adjustment and setting of the probe sliding rod, arch bridge, connecting rod, and clamping rod components, the pulsed eddy current probe can achieve dual inspection of vertically coated pipelines and circumferential pipelines. This fixing device is rationally designed, requiring no removal of the pipeline coating, is unaffected by lifting effects, allows for continuous online inspection, and boasts high inspection speed, accuracy, and a large inspection range. It significantly reduces costs and is more suitable for online use in customer production sites, possessing broad engineering application value. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the pulse eddy current probe fixing device for testing coated pipelines according to the present invention.

[0021] In the diagram: 1. Probe; 2. Probe rod; 3. Sliding plate; 4. Nut; 5. Arch bridge; 6. Connecting rod; 7. Clamping rod; 8. Pipe covering layer; 9. Pipe. Detailed Implementation

[0022] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0023] Wherein the same reference numerals in the drawings refer to the same components throughout.

[0024] Embodiment 1

[0025] The utility model is further illustrated below in combination with the drawings and embodiments.

[0026] As Figure 1 The utility model discloses a pulse eddy current probe fixing device for cladding pipeline detection, including probe 1, probe stem 2, slide piece 3, nut 4, arch bridge 5, connecting rod 6, clamping rod 7, probe 1 is fixed in one end 2 of probe stem, the other end of probe stem 2 passes through the through slot of arch bridge 5 and is arranged on the outer side of arch bridge 5 with nut 4 and slide piece 3, one end of connecting rod 6 is connected with arch bridge 5, and the other end of connecting rod 6 is connected with clamping rod 7, and one end of clamping rod 7 is designed as arc surface and is attached to the cladding layer of pipeline.

[0027] Probe stem 2 loose nut 4 uses slide piece 3 to drive probe stem 2 to realize the circumferential direction detection of cladding pipeline, and can also move clamping rod 7 to drive probe stem 2 to realize the vertical direction detection of cladding pipeline.

[0028] Slide piece 3 and arch bridge 5 have the same curvature, slide piece 3 is provided with through hole, and probe stem 2 can pass through, and the position of probe stem 2 is fixed through fixed nut 4 and slide piece 3.

[0029] Probe 1 and probe 2 are concentrically assembled, probe 1 can be disassembled and replaced with other probes according to actual detection needs.

[0030] The specific work flow of the example is as follows:

[0031] When circumferential detection of cladding pipeline is carried out, first, probe 1 and probe stem 2 are fixed in the through slot of arch bridge 5 with slide piece 3 and nut 4, then connecting rod 6 is adjusted according to the cladding pipeline, and clamping rod 7 is used to clamp the stabilizing device, after the pulse eddy current probe device is fixed, probe 1 and probe stem 2 are moved in the through slot of arch bridge 5 as a whole by loosening nut 4 and using slide piece 3, so that the circumferential detection of probe 1 on the cladding pipeline is realized.

[0032] When axial detection of different cladding pipelines is carried out, first, probe 1 and probe stem 2 are fixed in the through slot of arch bridge 5 with slide piece 3 and nut 4, then connecting rod 6 is adjusted according to the cladding pipeline, and clamping rod 7 is used to clamp the stabilizing device, according to the diameters of different cladding pipelines, the connecting position of clamping rod 7 of connecting rod 6 is adjusted, so that the detection of probe 1 on the cladding pipeline is realized.

[0033] In summary, according to actual detection needs, the components of the pulse eddy current probe fixing device can realize the circumferential and vertical direction detection of cladding pipeline at the same time.

[0034] The above only describes the present application in detail, but the present application is not limited to the above-mentioned embodiments, and any modification, equivalent, replacement, improvement, etc. within the scope of knowledge possessed by those skilled in the art and within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pulsed eddy current probe fixture for cladding pipe inspection, characterized by, The probe, the probe rod, the sliding sheet, the arch bridge, the connecting rod and the clamping rod are included. The arch bridge is an arc-shaped strip plate, and a strip-shaped through groove is arranged at the center of the plate surface of the arch bridge. The probe is fixed at one end of the probe rod, and the other end of the probe rod is slidably connected to the arch bridge through the through groove of the arch bridge and the sliding sheet. The clamping rod is symmetrically arranged at the side of the two end points of the arch bridge and is located on the same ring surface with the arch bridge. One end of the connecting rod is connected to the end point of the arch bridge, and the other end is fixedly connected with the rod body of the clamping rod.

2. The pulsed eddy current probe fixture for cladding pipe inspection of claim 1, wherein, The rod body of the probe rod is provided with a thread, and the nut is matched with the rod body and pressed on the sliding sheet to lock the sliding sheet in the axial direction of the probe rod.

3. The pulsed eddy current probe fixture for cladding pipe inspection of claim 1, wherein, One end of the connecting rod is provided with a through hole for the clamping rod to pass through, and the other end is provided with a square groove for connecting with the end point of the arch bridge.

4. The pulsed eddy current probe fixture for cladding pipe inspection of claim 3, wherein, The rod body of the clamping rod is provided with a thread on the circumferential side, and the nut is fixed and positioned at different positions through the connecting rod.

5. The pulsed eddy current probe fixture for cladding pipe inspection of claim 3, wherein, The end point of the arch bridge is provided with a tab matched with the square groove.

6. The pulsed eddy current probe fixture for cladding pipe inspection of claim 1, wherein, The probe and the probe rod are concentrically assembled.

7. The pulsed eddy current probe fixture for cladding pipe inspection of claim 1, wherein, The sliding sheet and the arch bridge have the same curvature.

8. The pulsed eddy current probe fixture for cladding pipe inspection of claim 1, wherein, The curvature of the arch bridge is smaller than the curvature of the pipe coating.

9. A pulsed eddy current probe fixture for cladding pipe inspection according to claim 8, wherein, The inner side of the pipe coating surface is provided with a pipe.

Images