Acoustic detection device for pipeline inner wall damage

Abstract

The utility model relates to the technical field of pipeline inner wall flaw detection, in particular to a pipeline inner wall damage acoustic detection device which comprises a moving body moving and crawling in a pipeline. The rotating wheel is coaxially and rotatably connected to the moving body, the mounting arms are fixedly connected to the peripheral wall of the rotating wheel, the detectors are arranged at the ends, away from the axis of the rotating wheel, of the mounting arms, the mounting arms are distributed around the axis of the rotating wheel at intervals, and the moving body is provided with a rotating motor for driving the rotating wheel to rotate around the axis of the rotating wheel. The moving main body moves and crawl in the pipeline so as to drive the detection frame to move in the inner cavity of the pipeline, and the rotating motor drives the rotating wheel to rotate, so that the positions of the detectors are changed, different positions on the circumferential side of the inner wall of the pipeline are detected, and the possibility that the inner wall of the pipeline has detection blind areas is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline inner wall damage detection, in particular to a pipeline inner wall damage acoustic detection device. BACKGROUND

[0002] Pipeline inner wall damage detection technology plays an important role in the field of industrial detection, especially in key industries such as energy transportation and chemical production. With the rapid development of modern industry, the safety and reliability of pipeline systems have attracted more and more attention. In order to ensure the long-term stable operation of the pipeline, it is the primary task to detect the damage or leakage of the pipeline inner wall in time. Acoustic detection, as an efficient and non-destructive detection method, is widely used in pipeline inner wall damage detection, providing important technical support for ensuring the safety of the pipeline.

[0003] In the prior art, acoustic detection is commonly used to check whether the pipeline inner wall is damaged or leaked. In acoustic detection, ultrasonic detection is usually used. Ultrasonic detection is a non-destructive detection method for checking the internal defects of metal components by using ultrasonic waves. The detector emits ultrasonic waves to the surface of the component. When the ultrasonic waves propagate in the component, different reflection signals will be generated at different interfaces. By using the time difference of different reflection signals transmitted to the detector, the internal defects of the component can be detected.

[0004] In the prior art, the detector of the pipeline damage detection equipment is fixed, which cannot fully cover all areas of the pipeline inner wall, so there is a possibility of detection blind area in the pipeline inner wall, and therefore further improvement is needed. CONTENT OF THE INVENTION

[0005] In order to reduce the possibility of detection blind area in the pipeline inner wall, the present application provides a pipeline inner wall damage acoustic detection device.

[0006] The pipeline inner wall damage acoustic detection device provided by the present application adopts the following technical scheme:

[0007] A pipeline inner wall damage acoustic detection device, comprising a mobile body moving and crawling in the pipeline, the mobile body is provided with a detection frame, the detection frame comprises a rotating wheel coaxially connected to the mobile body, a mounting arm fixedly connected to the outer peripheral wall of the rotating wheel, and a detector provided at the end of the mounting arm away from the axis of the rotating wheel, the mounting arm is provided with a plurality of mounting arms and is spaced around the axis of the rotating wheel, and the mobile body is provided with a rotating motor driving the rotating wheel to rotate around its axis.

[0008] By adopting the above technical scheme, the mobile body moves and crawls in the pipeline to drive the detection frame to move in the pipeline cavity. The rotating motor drives the rotating wheel to rotate, thereby changing the positions of the plurality of detectors, realizing detection operation at different positions of the pipeline inner wall, and reducing the possibility of detection blind area in the pipeline inner wall.

[0009] Preferably, the mounting arm comprises a fixed rod fixedly connected to the outer peripheral wall of the runner and a movable rod slidably connected to the fixed rod along the radial direction of the runner, the length direction of the fixed rod is parallel to the radial direction of the runner, the detector is mounted at the end of the movable rod away from the runner, and the runner is provided with a first adjusting assembly for adjusting the sliding position of the movable rod.

[0010] By adopting the above technical scheme, the mounting arm is composed of the fixed rod and the movable rod, and the movable rod can slide along the radial direction of the runner, so as to adjust the distance between the detector and the axis of the runner. Through the first adjusting assembly, the position of the movable rod can be accurately controlled, so that the detector can adapt to the detection requirements of the inner wall of the pipeline with different diameters, and the flexibility and application range of detection are improved.

[0011] Preferably, the first adjusting assembly comprises a first telescopic piece fixedly connected to the end face of the runner, a first mounting head fixedly connected to the active end of the first telescopic piece, and a first hinged rod hingedly connected at one end to the first mounting head and at the other end to the movable rod, and the telescopic direction of the first telescopic piece is parallel to the axial direction of the runner.

[0012] By adopting the above technical scheme, the telescopic movement of the first telescopic piece can drive the first mounting head to move along the axial direction of the runner, and then through the hinged connection of the two ends of the first hinged rod, the axial displacement of the first mounting head is converted into the sliding of the movable rod relative to the fixed rod, so that the position of the detector can be flexibly adjusted according to the actual detection requirements.

[0013] Preferably, the first telescopic piece is a first electric cylinder, and the cylinder body of the first electric cylinder is fixedly connected to the runner, and the first mounting head is fixedly connected to the piston rod of the first electric cylinder.

[0014] By adopting the above technical scheme, the sliding of the first mounting head is realized through the extension and retraction of the piston rod of the first electric cylinder.

[0015] Preferably, the end outer wall of the movable rod is fixedly connected to a limiting sleeve, the detector is inserted into the limiting sleeve, and the outer peripheral wall of the limiting sleeve is threadedly locked against the top screw of the detector.

[0016] By adopting the above technical scheme, the setting of the limiting sleeve can facilitate the installation and disassembly of the detector, and by inserting the detector into the limiting sleeve and locking and fixing it by the top screw, the stability of the detector installation is improved, and the detector is convenient to replace or maintain.

[0017] Preferably, the outer periphery of the moving body is provided with a plurality of crawling track wheels distributed around the axis of the moving body, the two ends of each crawling track wheel are hingedly connected to a pair of support arms arranged in parallel, the other end of the support arm is hingedly connected to the outer wall of the moving body, and the moving body is provided with a second adjusting assembly for adjusting the swing angle of the support arm.

[0018] By adopting the technical scheme, the crawling track wheels are distributed around the axis of the moving main body, and the cooperation of the plurality of crawling track wheels can enhance the movement stability of the device in the pipeline.

[0019] Preferably, the moving main body has an adjusting cavity, and an avoiding groove communicated with the adjusting cavity is arranged on the outer peripheral wall of the moving main body, and the second adjusting assembly comprises a second telescopic member arranged in the adjusting cavity, a second mounting head fixedly connected to the active end of the second telescopic member, a sliding block fixedly connected to the second mounting head and slidably connected to the avoiding groove, and a second hinged rod hingedly connected to the sliding block at one end and hingedly connected to the support arm at the other end.

[0020] By adopting the technical scheme, the second mounting head is driven to move by the second telescopic member, and then the sliding block is driven to slide along the avoiding groove, and finally the swing angle of the support arm is adjusted by the second hinged rod, so that the position adjustment of the crawling track wheel is realized.

[0021] Preferably, the second telescopic member is a second electric cylinder, and the cylinder body of the second electric cylinder is fixedly connected to the inner wall of the adjusting cavity, and the second mounting head is fixedly connected to the piston rod of the second electric cylinder.

[0022] By adopting the technical scheme, the sliding of the second mounting head is realized by the extension and retraction of the piston rod of the second electric cylinder.

[0023] In summary, the utility model has the following beneficial effects:

[0024] 1. The moving main body moves and crawls in the pipeline to drive the detection frame to move in the inner cavity of the pipeline, the rotating motor drives the rotating wheel to rotate, thereby changing the positions of the plurality of detectors, realizing the detection operation on different positions of the inner wall of the pipeline, and reducing the possibility of the detection blind area of the inner wall of the pipeline.

[0025] 2. The mounting arm is composed of a fixed rod and a movable rod, the movable rod can slide along the radial direction of the rotating wheel, thereby adjusting the distance between the detector and the axis of the rotating wheel. The position of the movable rod can be accurately controlled by the first adjusting assembly, so that the detector can adapt to the detection requirements of the inner wall of the pipeline with different diameters, and the flexibility and application range of the detection are improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a whole structure schematic view of a pipeline inner wall damage acoustic detection device.

[0027] Figure 2 It is a structure schematic view of a second adjusting assembly.

[0028] Figure 3It is the structural diagram of detection frame.

[0029] In the figure, 1, mobile body; 11, lighting lamp; 12, support arm; 13, adjusting cavity; 14, avoiding groove; 15, mounting cavity; 16, rotating motor; 2, crawling track wheel; 21, wheel seat; 22, rubber track; 3, second adjusting assembly; 31, second electric cylinder; 32, second mounting head; 33, sliding block; 34, second hinged rod; 4, detection frame; 41, rotating wheel; 42, mounting arm; 43, detector; 421, fixed rod; 422, movable rod; 423, limiting sleeve; 424, jackscrew; 5, first adjusting assembly; 51, first electric cylinder; 52, first mounting head; 53, first hinged rod. DETAILED DESCRIPTION

[0030] The following will be combined with the accompanying Figures 1-3 The application is further described in detail.

[0031] The embodiment of the application discloses a kind of acoustic detection devices of pipeline inner wall damage, refer to Figure 1 , including the mobile body 1 of crawling in pipeline, mobile body 1 head end is provided with lighting lamp 11.Mobile body 1 periphery wall is provided with crawling track wheel 2, crawling track wheel 2 is provided with multiple and is distributed around the axis of mobile body 1, in the embodiment, crawling track wheel 2 is provided with three.Crawling track wheel 2 includes wheel seat 21, a plurality of rotatingly connected transmission wheel of wheel seat 21 and rubber track 22 around transmission wheel, rubber track 22 outer wall abuts to pipeline inner wall, wheel seat 21 is built-in crawling motor for driving transmission wheel rotation.

[0032] Refer to Figure 1 , Figure 2 , the outer wall of each crawling track wheel 2 wheel seat 21 front and back side is hinged to a pair of parallelly arranged support arm 12, the other end of support arm 12 is hinged to the outer wall of mobile body 1, mobile body 1 is provided with the second adjusting assembly 3 for adjusting the swing angle of support arm 12.Mobile body 1 has adjusting cavity 13, and the outer periphery wall of mobile body 1 is provided with avoiding groove 14 communicated with adjusting cavity 13, and the second adjusting assembly 3 includes second telescopic piece built-in adjusting cavity 13, second mounting head 32 fixedly connected to the movable end of second telescopic piece, sliding block 33 fixedly connected to second mounting head 32 and slidingly connected to avoiding groove 14 and second hinged rod 34 hinged to one end of sliding block 33 and the other end of second hinged rod 34 is hinged to support arm 12.In the embodiment, the second telescopic piece is second electric cylinder 31, and the axis of second electric cylinder 31 is parallel to the axis of mobile body 1, and the cylinder body of second electric cylinder 31 is fixedly connected to the inner wall of adjusting cavity 13, and the piston rod of second electric cylinder 31 is fixedly connected to second mounting head 32, and second electric cylinder 31 can adopt waterproof electric cylinder.

[0033] The tail end of the moving body 1 is provided with a detection frame 4, the detection frame 4 comprises a rotating wheel 41 coaxially rotating connected to the tail end of the moving body 1, a mounting arm 42 fixedly connected to the outer peripheral wall of the rotating wheel 41, and a detector 43 provided at the end of the mounting arm 42 away from the axis of the rotating wheel 41, the mounting arm 42 is provided with a plurality of and is spacedly distributed around the axis of the rotating wheel 41, in this embodiment, the mounting arm 42 is provided with eight. The tail end of the moving body 1 has a mounting cavity 15, the moving body 1 is provided with a rotating motor 16 driving the rotating wheel 41 to rotate around its axis, the rotating motor 16 is a stepping motor, the rotating motor 16 is fixedly connected to the inner wall of the mounting cavity 15, the output shaft of the rotating motor 16 is coaxially fixedly connected to the rotating wheel 41.

[0034] Referring to Figure 3 , the mounting arm 42 comprises a fixed rod 421 fixedly connected to the outer peripheral wall of the rotating wheel 41 and a movable rod 422 slidingly connected to the fixed rod 421 along the radial direction of the rotating wheel 41. The rotating wheel 41 is provided with a first adjusting assembly 5 adjusting the sliding position of the movable rod 422, the first adjusting assembly 5 comprises a first telescopic piece fixedly connected to the outer end surface of the rotating wheel 41, a first mounting head 52 fixedly connected to the active end of the first telescopic piece, and a first hinged rod 53 hingedly connected at one end to the first mounting head 52 and at the other end to the movable rod 422. The telescopic direction of the first telescopic piece is parallel to the axial direction of the rotating wheel 41, specifically, the first telescopic piece is a first electric cylinder 51, the cylinder body of the first electric cylinder 51 is fixedly connected to the rotating wheel 41, the first mounting head 52 is fixedly connected to the piston rod of the first electric cylinder 51, and the first electric cylinder 51 can adopt a waterproof electric cylinder.

[0035] The end portion of the movable rod 422 away from the rotating wheel 41 is fixedly connected with a limiting sleeve 423, the detector 43 is inserted into the limiting sleeve 423, and the outer peripheral wall of the limiting sleeve 423 is threadedly locked against the top wire 424 of the outer peripheral wall of the detector 43. The detector 43 can adopt a hydrophone or an ultrasonic probe.

[0036] The implementation principle of the pipe inner wall damage acoustic detection device according to the embodiment of the application is that the piston rod of the second electric cylinder 31 is driven to extend and retract to drive the second mounting head 32 to move, thereby driving the sliding block 33 to slide along the avoiding groove 14, and finally the swing angle of the supporting arm 12 is adjusted by the second hinged rod 34, so as to realize the position adjustment of the crawling track wheel 2, so that the rubber track 22 of the crawling track wheel 2 is tightly pressed against the inner wall of the pipe, the moving body 1 moves and crawls in the pipe, thereby driving the detection frame 4 to move in the inner cavity of the pipe for detection work, the rotating motor 16 can be driven to drive the rotating wheel 41 to rotate, thereby changing the positions of the plurality of detectors 43, realizing the detection work at different positions of the circumferential side of the pipe inner wall, and reducing the possibility of existing detection blind area of the pipe inner wall.

[0037] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. An apparatus for acoustic detection of an in-line pipe wall damage, characterized by: The moving body (1) is a moving body that moves and crawls inside the pipe. The moving body (1) is equipped with a detection frame (4). The detection frame (4) includes a rotating wheel (41) coaxially rotatably connected to the moving body (1), an mounting arm (42) fixedly connected to the outer peripheral wall of the rotating wheel (41), and a detector (43) located at one end of the mounting arm (42) away from the axis of the rotating wheel (41). Multiple mounting arms (42) are provided and are spaced apart around the axis of the rotating wheel (41). The moving body (1) is equipped with a rotary motor (16) that drives the rotating wheel (41) to rotate around its own axis.

2. The acoustic detection device for pipe inner wall damage according to claim 1, characterized in that: The mounting arm (42) includes a fixed rod (421) fixedly connected to the outer peripheral wall of the rotating wheel (41) and a movable rod (422) slidably connected to the fixed rod (421) along the radial direction of the rotating wheel (41). The length direction of the fixed rod (421) is parallel to the radial direction of the rotating wheel (41). The detector (43) is installed at the end of the movable rod (422) away from the rotating wheel (41). The rotating wheel (41) is provided with a first adjustment component (5) for adjusting the sliding position of the movable rod (422).

3. The acoustic detection device for pipe inner wall damage according to claim 2, characterized in that: The first adjustment component (5) includes a first telescopic member fixedly connected to the end face of the rotating wheel (41), a first mounting head (52) fixedly connected to the movable end of the first telescopic member, and a first hinge rod (53) with one end hinged to the first mounting head (52) and the other end hinged to the movable rod (422). The telescopic direction of the first telescopic member is parallel to the axial direction of the rotating wheel (41).

4. The acoustic detection device for pipe inner wall damage according to claim 3, characterized in that: The first telescopic component is a first electric cylinder (51), the cylinder body of the first electric cylinder (51) is fixedly connected to the rotating wheel (41), and the first mounting head (52) is fixedly connected to the piston rod of the first electric cylinder (51).

5. The acoustic detection device for pipe inner wall damage according to claim 2, characterized in that: The end outer wall of the movable rod (422) is fixedly connected to a limiting sleeve (423), and the detector (43) is inserted into the limiting sleeve (423). The outer peripheral wall of the limiting sleeve (423) is threaded and locked against the top screw (424) of the detector (43).

6. The acoustic detection device for pipe inner wall damage according to claim 1, characterized in that: The outer periphery of the moving body (1) is provided with crawling track wheels (2), and multiple crawling track wheels (2) are provided and distributed around the axis of the moving body (1). Each crawling track wheel (2) has a pair of parallel support arms (12) hinged at both ends. The other end of the support arm (12) is hinged to the outer wall of the moving body (1). The moving body (1) is provided with a second adjustment component (3) for adjusting the swing angle of the support arm (12).

7. The acoustic detection device for pipe inner wall damage according to claim 6, characterized in that: The moving body (1) has an adjustment cavity (13), and the outer peripheral wall of the moving body (1) is provided with a relief groove (14) communicating with the adjustment cavity (13). The second adjustment component (3) includes a second telescopic member built into the adjustment cavity (13), a second mounting head (32) fixedly connected to the movable end of the second telescopic member, a slider (33) fixedly connected to the second mounting head (32) and slidably connected to the relief groove (14), and a second hinge rod (34) with one end hinged to the slider (33) and the other end hinged to the support arm (12).

8. The acoustic detection device for pipe inner wall damage according to claim 7, characterized in that: The second telescopic component is a second electric cylinder (31). The cylinder body of the second electric cylinder (31) is fixedly connected to the inner wall of the adjustment cavity (13), and the second mounting head (32) is fixedly connected to the piston rod of the second electric cylinder (31).

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