Detection arm for pipeline surface defect detection device

Abstract

The utility model discloses a detection arm for a pipeline surface defect detection device, and relates to the technical field of pipeline detection equipment. According to the key points of the technical scheme, the device comprises a mounting block, a first connecting rod and a second connecting rod are hinged to the surface of the mounting block, the device further comprises detection pieces arranged at the ends of the first connecting rod and the second connecting rod, and the ends of the first connecting rod and the second connecting rod are both hinged to the detection pieces; and a tension spring is arranged between the end part, close to the detection piece, of the first connecting rod and the mounting block. The utility model aims to provide a detection arm for a pipeline surface defect detection device.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline detection equipment, and more specifically, to a detection arm used in a pipeline surface defect detection device. Background Art

[0002] Pipelines are important facilities for transporting liquids and gases. They are widely used in water supply, drainage, heating, gas supply, long-distance transportation of oil and natural gas, agricultural irrigation, hydraulic engineering and various industrial installations. Due to various reasons such as transmission medium corrosion, stress, construction damage, natural disasters, etc., various defects may occur on the pipe wall. These defects are very harmful to the safe operation of the pipeline. Timely detection of defects is an important means to guide pipeline maintenance work and maintain pipeline integrity.

[0003] After long-term use, pipelines need to be inspected for surface defects to ensure their normal transportation. Existing pipeline inspection devices detect metal loss and gain through the detection arm when passing through the inside of the pipeline. The detection arm on the existing inspection device can usually only inspect pipelines of the same specification and diameter, and its scope of application is relatively small.

[0004] Therefore, a new technical solution is urgently needed to solve the above technical problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model aims to provide a detection arm for a pipeline surface defect detection device.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions: a detection arm for a pipeline surface defect detection device, comprising a mounting block, a first connecting rod and a second connecting rod are hingedly connected on the surface of the mounting block, and also comprising a detection member arranged at the ends of the first connecting rod and the second connecting rod, the ends of the first connecting rod and the second connecting rod are both hingedly connected to the detection member, and a tension spring is arranged between the end of the first connecting rod close to the detection member and the mounting block.

[0007] By adopting the above technical solution, under the tension of the tension spring, the first connecting rod and the second connecting rod are in an open state relative to the through rod, and the diameter of the detection component in the open state is larger than the inner diameter of the pipeline. The device is then placed inside the pipeline, and is manually pulled by a pull rope or driven by an automatic drive device to move inside the pipeline. The end of the detection component is pressed against the inner wall of the pipeline, so that pipelines of different diameters can be detected, and its scope of use is relatively large.

[0008] The utility model is further configured as follows: the first connecting rod and the second connecting rod have the same length, the hinge position of the first connecting rod and the mounting block is lower than the hinge position of the second connecting rod and the mounting block, first connecting plates are provided on both sides of the surface of the mounting block, and the ends of the first connecting rod and the second connecting rod are hinged between the two first connecting plates.

[0009] The utility model is further configured as follows: the detection member includes a detection seat, one end of the detection seat is arranged in an inclined surface, and second connecting plates are arranged on both sides of the inclined surface, and the ends of the first connecting rod and the second connecting rod are hinged between the two second connecting plates.

[0010] The utility model is further configured as follows: the first connecting rod is provided with a first groove running through the end thereof close to the detection member, first hinge shafts are provided at both ends of the first connecting rod, a positioning plate is provided on the side of the surface of the mounting block away from the first connecting rod, a positioning hole is provided on the positioning plate, and both ends of the tension spring are respectively connected to the first connecting rod and the positioning holes of the positioning plate.

[0011] The utility model is further configured as follows: through holes are provided on the surface of the mounting block at both sides of the positioning plate, bolts are provided in the through holes, and a plurality of threaded holes for threaded connection of the bolts are provided on the circumferential surface of the detection device.

[0012] The utility model is further configured as follows: a magnetic flux leakage probe and an eddy current probe are arranged on the detection seat.

[0013] The utility model has the following beneficial effects: under the tension of the tension spring, the first connecting rod and the second connecting rod are in an open state, and by arranging a plurality of the detection arms on the peripheral side of the detection device, when detection work is required, the detection device is placed inside the pipeline, and the device is driven to move inside the pipeline by manually pulling with a pull rope or an automatic driving device, and the end of the detection component is pressed against the inner wall of the pipeline, so that pipelines of different diameters can be detected. Under the action of the tension spring, the first connecting rod and the second connecting rod have a larger deflection angle, so that the detection device with the detection arm has a larger application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the three-dimensional structure of this embodiment;

[0015] Figure 2 This is a schematic diagram of the explosion structure of the detection component of this embodiment.

[0016] Description of the drawings: 101, mounting block; 1011, first connecting plate; 1012, positioning plate; 1013, positioning hole; 1014, through hole; 1015, bolt; 102, first connecting rod; 1021, first groove; 1022, first hinge axis; 103, second connecting rod; 104, detection member; 1041, detection seat; 1042, second connecting plate; 105, tension spring. DETAILED DESCRIPTION

[0017] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0018] The same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0019] As shown in the figure, a detection arm for a pipeline surface defect detection device includes a mounting block 101, a first connecting rod 102 and a second connecting rod 103 are hingedly connected on the surface of the mounting block 101, and also includes a detection member 104 arranged at the ends of the first connecting rod 102 and the second connecting rod 103, the ends of the first connecting rod 102 and the second connecting rod 103 are both hinged to the detection member 104, and a tension spring 105 is arranged between the end of the first connecting rod 102 close to the detection member 104 and the mounting block 101.

[0020] A plurality of the detection arms are evenly arranged around the detection device, such as Figure 1 As shown, under the tension of the tension spring 105, the first connecting rod 102 and the second connecting rod 103 are deflected toward the outside and are in an open state, and then the detection device is placed inside the pipeline, and the device is moved inside the pipeline by manually pulling a pull rope or an automatic driving device, and the end of the detection component 2 is pressed against the inner wall of the pipeline to detect pipelines of different diameters. Under the action of the tension spring 105, the first connecting rod 102 and the second connecting rod 103 have a larger deflection angle, so that the detection device with the detection arm has a wider range of application.

[0021] The detection base 1041 is provided with a magnetic flux leakage probe and an eddy current probe, so as to detect the loss and increase of metal inside and outside the pipeline, thereby detecting the surface defects of the pipeline.

[0022] The first connecting rod 102 and the second connecting rod 103 have the same length, the hinge position of the first connecting rod 102 and the mounting block 101 is lower than the hinge position of the second connecting rod 103 and the mounting block 101, first connecting plates 1011 are arranged on both sides of the surface of the mounting block 101, and the ends of the first connecting rod 102 and the second connecting rod 103 are hinged between the two first connecting plates 1011. The detection member 104 includes a detection seat 1041, one end of the detection seat 1041 is arranged in an inclined surface, and the two sides of the inclined surface are provided with second connecting plates 1042, and the ends of the first connecting rod 102 and the second connecting rod 103 are both hinged between the two second connecting plates 1042.

[0023] A freely movable parallelogram is formed between the first connecting rod 102 , the second connecting rod 103 , the mounting block 101 and the detection base 1041 , so that the surface of the detection base 1041 is always in a horizontal state.

[0024] The first connecting rod 102 is provided with a first groove 1021 passing through its end near the detection member 104, and first hinge shafts 1022 are provided at both ends of the first connecting rod 102. A positioning plate 1012 is provided on the side of the surface of the mounting block 101 away from the first connecting rod 102, and a positioning hole 1013 is provided on the positioning plate 1012. The two ends of the tension spring 105 are respectively connected to the first hinge shaft 1022 near the detection seat 1041 and the positioning hole 1013 of the positioning plate 1012, and the tension spring 105 is installed through the positioning hole 1013 and the first hinge shaft 1022.

[0025] The surface of the mounting block 101 is provided with through holes 1014 on both sides of the positioning plate 1012 , and bolts 1015 are arranged in the through holes 1014 for installation and removal thereof.

[0026] The specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A detection arm for a pipeline surface defect detection device, characterized in that: The invention comprises a mounting block (101), a first connecting rod (102) and a second connecting rod (103) being hingedly connected to the surface of the mounting block (101), and a detection member (104) arranged at the ends of the first connecting rod (102) and the second connecting rod (103), the ends of the first connecting rod (102) and the second connecting rod (103) being hingedly connected to the detection member (104), and a tension spring (105) being arranged between the end of the first connecting rod (102) close to the detection member (104) and the mounting block (101); The first connecting rod (102) and the second connecting rod (103) have the same length, a hinge position between the first connecting rod (102) and the mounting block (101) is lower than a hinge position between the second connecting rod (103) and the mounting block (101), first connecting plates (1011) are provided on both sides of the surface of the mounting block (101), and ends of the first connecting rod (102) and the second connecting rod (103) are hinged between the two first connecting plates (1011); The detection member (104) comprises a detection seat (1041), one end of the detection seat (1041) is arranged in an inclined surface, and second connecting plates (1042) are arranged on both sides of the inclined surface, and the ends of the first connecting rod (102) and the second connecting rod (103) are hinged between the two second connecting plates (1042); The first connecting rod (102) is provided with a first groove (1021) penetrating the end thereof close to the detection member (104); first hinge shafts (1022) are provided at both ends of the first connecting rod (102); a positioning plate (1012) is provided on the side of the surface of the mounting block (101) away from the first connecting rod (102); a positioning hole (1013) is provided on the positioning plate (1012); and two ends of the tension spring (105) are respectively connected to the first hinge shaft (1022) close to the detection seat (1041) and the positioning hole (1013) of the positioning plate (1012).

2. The detection arm for pipeline surface defect detection device according to claim 1, characterized in that: The surface of the mounting block (101) is provided with through holes (1014) on both sides of the positioning plate (1012), bolts (1015) are arranged in the through holes (1014), and the circumferential surface of the detection device is provided with a plurality of threaded holes for threaded connection of the bolts (1015).

3. The detection arm for pipeline surface defect detection device according to claim 2, characterized in that: The detection seat (1041) is provided with a magnetic flux leakage probe and an eddy current probe.

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