Sound wave detection device for outer wall of pipeline

Abstract

The utility model relates to the technical field of pipeline outer wall detection, and discloses a sound wave detection device for a pipeline outer wall, which comprises a base, a rubber air bag arranged in a shell in a matched manner, a key position arranged on the outer surface of the rubber air bag in a matched manner, and a mounting hole formed in the outer surface of a connecting plate, and a connecting piece is rotationally connected into the mounting hole. The pipeline is arranged on the outer side of the shell in a sleeving mode, then air is injected into the channel through the air nozzle, the air flows into the rubber air bag and inflates the rubber air bag, and in the expansion process of the rubber air bag, the key position can be gradually ejected out of the through opening and abuts against the inner wall of the pipeline; and when the outer wall of the pipeline is detected, the outer wall of the pipeline is prevented from being shielded by parts of the sound wave detection device, so that the outer wall of the pipeline can be comprehensively detected by the detection probe, and a relatively good detection effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline outer wall detection, in particular to an acoustic wave detection device for the outer wall of a pipeline. Background Technique

[0002] In engineering detection, a manual ultrasonic detector is usually used for pipeline detection. The manual ultrasonic detector is generally used to detect the thickness, cracks, slag inclusions, pores, etc. of the pipeline. When detecting the circumferential direction of the outer periphery of the pipeline, the operator needs to hold the detector, face the detection probe towards the pipeline, and then rotate around the axis of the pipeline for one week for detection.

[0003] The utility model patent application document with the publication number of "CN221056397U" discloses a detection device for the outer wall of a metal pipeline, which mainly consists of a base, a support plate, a first motor, a first cylinder, a first side plate, a second motor, a second threaded rod, a slider and a second cylinder. Through the setting of the detection plates on both sides, during use, the metal pipeline is clamped by the detection plates on both sides for horizontal movement detection, so as to achieve the effect of detecting two sides at one time and improve the detection efficiency. Through the setting of the first cylinder and the arc plate, during use, only one end of the pipeline needs to be inserted into the second clamping block, and the other end of the pipeline is placed on the surface of the arc plate. Then, the first cylinder is started to lift the pipeline until the pipeline is in a horizontal state, and then the pipeline is clamped and fixed by the first clamping block, so as to achieve the effect of convenient fixation.

[0004] The detection device for the outer wall of the metal pipeline disclosed in the above document has the following defects: in this technical solution, one end of the metal pipeline is inserted into the inside of the second clamping block, and then the other end of the metal pipeline is placed on the top of the arc plate. Then, the first motor is started to drive the first threaded rod to rotate, so that it pushes the first clamping block to squeeze the metal pipeline and clamp the metal pipeline between the first clamping block and the second clamping block for fixation. However, during the detection process, the first clamping block and the second clamping block will contact with part of the outer wall of the pipeline, thus causing the first clamping block and the second clamping block to block the outer wall of the pipeline, making the detection probe unable to detect the surface of the pipeline blocked. Content of the Utility Model

[0005] The purpose of the utility model is to provide an acoustic wave detection device for the outer wall of a pipeline, so as to solve the problem that the existing pipeline outer wall detection device will block part of the pipeline outer wall.

[0006] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0007] The utility model relates to a sound wave detection device for the outer wall of a pipeline, which comprises a base. A chute is arranged on the upper surface of the base. A bidirectional screw rod is rotatably connected to the inner surface of the chute. One end of the base is provided with a first motor, and the output end of the first motor is installed with the bidirectional screw rod through a coupling. A connecting frame and a support frame are installed on the upper surface of the base. A through groove is arranged on the upper surface of the connecting frame, and a slider is slidably connected to the inside of the through groove. A sound wave detection probe is installed on the lower surface of the slider. An electric push rod is cooperatively installed on the lower surface of the support frame. The output end of the electric push rod penetrates through the support frame and is cooperatively installed with a support plate. The outer surface of the bidirectional screw rod is threadedly connected with a connecting plate. The connecting plates are two and are symmetrically arranged. One end of each of the two connecting plates is located inside the chute, and both connecting plates move along the axis direction of the chute. Fixed structures are arranged at one ends of both connecting plates. The fixed structure comprises a housing. One end of the housing is cooperatively installed with a connecting piece. A channel is arranged on the outer surface of the connecting piece, and an air nozzle is installed inside the channel. An opening is arranged on the outer surface of the housing. A rubber air bag is cooperatively installed inside the housing. A key position is cooperatively installed on the outer surface of the rubber air bag, and the key position is slidably connected inside the opening. An installation hole is arranged on the outer surface of the connecting plate, and the connecting piece is rotatably connected inside the installation hole.

[0008] Further, a support plate is arranged on the outer surface of one of the connecting plates, and a second motor is installed on the upper surface of the support plate. The output end of the second motor is installed with the connecting piece through a coupling.

[0009] Further, a plurality of auxiliary components are cooperatively installed on the inner surface of the housing. The auxiliary component comprises a mounting seat, and the mounting seat is installed on the inner surface of the housing through bolts. One end of the mounting seat is cooperatively installed with a side plate. A chute is arranged on the outer surface of the mounting seat, and a guide rod is installed on the inner surface of the chute. The other end of the guide rod is installed on the outer surface of the side plate.

[0010] Further, a moving block is slidably connected to the outer surface of the guide rod. The moving blocks are two and are symmetrically distributed. A connecting rod is hinged to the upper surface of the moving block, and the other end of the connecting rod is hinged to a butting plate. The outer surface of the butting plate abuts against the outer surface of the rubber air bag.

[0011] Further, two springs are sleeved on the outer surface of the guide rod. One end of one of the springs abuts against the outer surface of the side plate, and the other end of the spring abuts against the outer surface of one of the moving blocks. One end of the other spring abuts against the inner surface of the chute, and the other end of the spring abuts against the outer surface of the other moving block.

[0012] Further, anti-slip stripes are arranged on the outer surface of the key position.

[0013] The utility model has the following beneficial effects:

[0014] (1) In the utility model, the pipeline is sleeved outside the shell, and then gas is injected into the channel through the air nozzle, so that the gas flows into the rubber airbag and inflates the rubber airbag. During the inflation process of the rubber airbag, the key position will gradually be pushed out of the through hole and abut against the inner wall of the pipeline, thereby effectively fixing the pipeline. When detecting the outer wall of the pipeline, it can avoid the parts of the acoustic wave detection device from blocking the outer wall of the pipeline, enabling the detection probe to comprehensively detect the outer wall of the pipeline and achieving a better detection effect.

[0015] (2) When the rubber airbag in the utility model inflates and expands, its outer surface presses against the abutting plate, causing the abutting plate to move outwards. When the abutting plate moves, it is transmitted to the moving block through the connecting rod of the hinge, pushing the moving block to slide along the guiding rod. When the moving block slides, the spring on the guiding rod is compressed, and the spring generates a reaction force, which is transmitted back to the abutting plate through the connecting rod and exerts a uniform radial pressure on the rubber airbag, achieving a better auxiliary effect.

[0016] (3) By pressing the air nozzle in the utility model, the gas in the rubber airbag is discharged to the outside through the channel, the internal air pressure of the rubber airbag decreases, and the rubber airbag gradually contracts. At this time, the spring in the auxiliary component, due to being compressed before, will release elastic energy storage, pushing the moving block to slide along the guiding rod. The moving block drives the abutting plate to move inwards through the connecting rod, exerting an inward pressure on the rubber airbag to help the rubber airbag recover to its original state faster, thereby indirectly accelerating the deflation process of the rubber airbag. During this process, the key position can be reset more quickly, and thus the fixation of the key position on the pipeline can be accelerated.

[0017] Certainly, when implementing any product of the utility model, it is not necessarily required to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following will briefly introduce the drawings required for describing the embodiments. Obviously, the drawings in the following description are only some embodiments of the utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the partial structure of the utility model;

[0021] Figure 3 It is an exploded view of the auxiliary component and the fixing structure of the utility model;

[0022] Figure 4 Cross-sectional view of the auxiliary component and the fixing structure of the present utility model;

[0023] Figure 5 Exploded view of the structure of the auxiliary component of the present utility model;

[0024] In the accompanying drawings, the list of components represented by each reference numeral is as follows:

[0025] In the figure: 1, base; 2, fixing structure; 201, outer shell; 202, connecting piece; 203, air nozzle; 204, rubber airbag; 205, key position; 3, auxiliary component; 301, mounting seat; 302, side plate; 303, guide rod; 304, moving block; 305, connecting rod; 306, abutting plate; 307, spring; 4, bidirectional screw; 5, first motor; 6, connecting frame; 7, support frame; 8, slider; 9, acoustic wave detection probe; 10, electric push rod; 11, support plate; 12, connecting plate; 1201, support board; 13, second motor. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] Please refer to Figures 1 - 5As shown in the figure, the utility model relates to an acoustic wave detection device for the outer wall of a pipeline, which comprises a base 1. A chute is provided on the upper surface of the base 1. A bidirectional screw 4 is rotatably connected to the inner surface of the chute. One end of the base 1 is provided with a first motor 5. The output end of the first motor 5 is installed with the bidirectional screw 4 through a coupling. The upper surface of the base 1 is installed with a connecting frame 6 and a support frame 7. A through groove is provided on the upper surface of the connecting frame 6. A slider 8 is slidably connected to the inside of the through groove. An acoustic wave detection probe 9 is installed on the lower surface of the slider 8. An electric push rod 10 is installed in cooperation with the lower surface of the support frame 7. The output end of the electric push rod 10 penetrates through the support frame 7 and is installed with a support plate 11 in cooperation. The outer surface of the bidirectional screw 4 is threadedly connected with a connecting plate 12. The connecting plate 12 is set to be two and is symmetrically arranged. One end of each of the two connecting plates 12 is located inside the chute. The two connecting plates 12 both move along the axis direction of the chute. A fixing structure 2 is provided at one end of each of the two connecting plates 12. The fixing structure 2 comprises a housing 201. A connecting piece 202 is installed in cooperation with one end of the housing 201. A channel is provided on the outer surface of the connecting piece 202. An air nozzle 203 is installed inside the channel. A through port is provided on the outer surface of the housing 201. A rubber airbag 204 is installed in cooperation with the inside of the housing 201. A keyway 205 is installed in cooperation with the outer surface of the rubber airbag 204. The keyway 205 is slidably connected inside the through port. An installation hole is provided on the outer surface of the connecting plate 12. The connecting piece 202 is rotatably connected to the inside of the installation hole;

[0028] The acoustic wave detection probe 9 is mainly composed of a piezoelectric transducer, an acoustic impedance matching layer, a backing damping layer, a protective layer and a housing;

[0029] The detection steps are as follows:

[0030] Step 1: The ultrasonic detector applies a high-voltage electrical pulse (typical frequency range: 0.5 MHz–10 MHz) to the probe. The piezoelectric wafer in the piezoelectric transducer is excited to generate mechanical vibration. The vibration of the piezoelectric wafer is transmitted into the measured pipeline wall through the matching layer to form an ultrasonic beam (longitudinal wave or transverse wave, depending on the detection requirements);

[0031] Step 2: The ultrasonic wave is transmitted into the measured pipeline wall through a coupling agent (such as machine oil, water) and propagates inside the pipeline. When the ultrasonic wave encounters internal defects (such as cracks, pores) or interfaces in the pipeline, part of the acoustic wave is reflected, scattered or attenuated to form an echo, and the reflected echo is received by the piezoelectric wafer;

[0032] Step 3: The piezoelectric wafer converts it into a weak electrical signal, which is amplified and filtered by the instrument and then displayed as a waveform or an image. By analyzing the echo time, amplitude and waveform characteristics, the defect position can be located and its size and nature can be evaluated.

[0033] During use, first place the pipeline on the upper surface of the pallet 11, and then start the electric push rod 10. The output end of the electric push rod 10 pushes the pallet 11 upward. When both ends of the pipeline are located on one side of the two outer shells 201, start the first motor 5, so that the output end of the first motor 5 drives the bidirectional screw 4 to rotate. When the bidirectional screw 4 rotates, the two connecting plates 12 will move along the axis direction of the chute. When the two connecting plates 12 move inward, the outer shell 201 will be located inside the pipeline. When the outer shell 201 is completely inside the pipeline, turn off the first motor 5. Then inject gas into the channel through the air nozzle 203, so that the gas flows into the inside of the rubber airbag 204 and inflates the rubber airbag 204. During the expansion process of the rubber airbag 204, the key positions 205 will gradually pop out from the through holes and abut against the inner wall of the pipeline, thereby effectively fixing the pipeline. When detecting the outer wall of the pipeline, the acoustic detection probe 9 emits high-frequency ultrasonic waves (usually 0.5 MHz - 10 MHz) to the outer wall of the pipeline. The acoustic waves propagate inside the pipeline wall. When encountering defects (such as cracks, corrosion) or wall thickness changes, the acoustic waves are reflected back to the probe. The acoustic detection probe 9 receives the reflected wave signal and transmits it to the external processing system through the data line. Analyze the amplitude, time difference, and waveform characteristics of the reflected wave, and combine with the position information of the acoustic detection probe 9 to generate a distribution map of the outer wall defects of the pipeline or a wall thickness change map, thereby avoiding the parts of the acoustic detection device from blocking the outer wall of the pipeline, so that the acoustic detection probe 9 can comprehensively detect the outer wall of the pipeline;

[0034] During detection, the position of the acoustic detection probe 9 can be adjusted by moving the slider 8 so that the slider 8 moves in the through groove;

[0035] A support plate 1201 is provided on the outer surface of one of the connecting plates 12, and a second motor 13 is installed on the upper surface of the support plate 1201. The output end of the second motor 13 is installed with a connecting piece 202 through a coupling;

[0036] If the fixing angle needs to be adjusted, start the second motor 13, so that the second motor 13 drives the outer shell 201 and the rubber airbag 204 to rotate around the axis of the mounting hole through the connecting piece 202, and the key positions 205 are adjusted circumferentially along the pipeline to further optimize the clamping distribution;

[0037] After the pipeline detection is completed, press the air nozzle 203, so that the gas in the rubber airbag 204 is discharged to the outside through the channel. The internal air pressure of the rubber airbag 204 decreases, and the rubber airbag 204 gradually contracts. The key positions 205 gradually cancel the abutment against the inner wall of the pipeline. Then reverse-start the first motor 5, so that the output end of the first motor 5 drives the bidirectional screw 4 to rotate, and the two connecting plates 12 move outward, so that the outer shell 201 disengages from the inside of the pipeline. When the outer shell 201 completely disengages from the pipeline, the pipeline on the pallet 11 can be removed at this time to complete the detection work;

[0038] A number of auxiliary components 3 are fitted and installed on the inner surface of the housing 201. The auxiliary component 3 includes a mounting base 301 which is installed on the inner surface of the housing 201 by bolts. One end of the mounting base 301 is fitted with a side plate 302. A chute is provided on the outer surface of the mounting base 301, and a guide rod 303 is installed on the inner surface of the chute. The other end of the guide rod 303 is installed on the outer surface of the side plate 302;

[0039] A moving block 304 is slidably connected to the outer surface of the guide rod 303. The moving blocks 304 are set to be two and symmetrically distributed. A connecting rod 305 is hinged to the upper surface of the moving block 304. The other end of the connecting rod 305 is hinged to a contact plate 306. The outer surface of the contact plate 306 abuts against the outer surface of the rubber airbag 204;

[0040] Two springs 307 are sleeved on the outer surface of the guide rod 303. One end of one spring 307 abuts against the outer surface of the side plate 302, and the other end of the spring 307 abuts against the outer surface of one of the moving blocks 304. One end of the other spring 307 abuts against the inner surface of the chute, and the other end of the spring 307 abuts against the outer surface of the other moving block 304;

[0041] When the rubber airbag 204 is inflated and expanded, its outer surface presses against the contact plate 306, causing the contact plate 306 to move outwards. When the contact plate 306 moves, it is transmitted to the moving block 304 through the connecting rod 305 of the hinge, pushing the moving block 304 to slide along the guide rod 303. When the moving block 304 slides, the spring 307 on the guide rod 303 is compressed. The spring 307 generates a reaction force, which is transmitted back to the contact plate 306 through the connecting rod 305 and applies a uniform radial pressure to the rubber airbag 204;

[0042] During the air release process of the rubber airbag 204, the spring 307 in the auxiliary component 3, due to being compressed before, will release the elastic energy storage, pushing the moving block 304 to slide along the guide rod 303. The moving block 304 drives the contact plate 306 to move inwards through the connecting rod 305, applying an inward pressure to the rubber airbag 204 to help the rubber airbag 204 recover to its original state faster, thereby indirectly accelerating the air release process of the rubber airbag 204. In this process, the key position 205 can be reset more quickly, and thus the fixing of the key position 205 to the pipeline is accelerated;

[0043] Anti-slip stripes are provided on the outer surface of the key position 205;

[0044] The anti-slip stripes can increase the contact area and surface roughness between the key position 205 and the inner wall of the pipeline, and improve the friction force between the two.

[0045] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principle and practical application of the present utility model, so that those skilled in the art in the relevant technical field can well understand and utilize the present utility model. The present utility model is only limited by the claims and their full scope and equivalents.

Claims

1. An acoustic detection device for the outer wall of a pipeline, comprising a base (1). A chute is provided on the upper surface of the base (1). A bidirectional screw (4) is rotatably connected to the inner surface of the chute. One end of the base (1) is provided with a first motor (5). The output end of the first motor (5) is installed with the bidirectional screw (4) through a coupling. A connecting frame (6) and a support frame (7) are installed on the upper surface of the base (1). A through groove is provided on the upper surface of the connecting frame (6). A slider (8) is slidably connected to the inside of the through groove. An acoustic detection probe (9) is installed on the lower surface of the slider (8). An electric push rod (10) is fitted and installed on the lower surface of the support frame (7). The output end of the electric push rod (10) penetrates through the support frame (7) and is fitted and installed with a support plate (11), and is characterized in that: The outer surface of the bidirectional screw (4) is threadedly connected with a connecting plate (12). Two connecting plates (12) are provided and are symmetrically arranged. One end of each of the two connecting plates (12) is located inside the sliding groove. The two connecting plates (12) both move along the axis direction of the sliding groove. One end of each of the two connecting plates (12) is provided with a fixing structure (2). The fixing structure (2) includes a housing (201). One end of the housing (201) is fitted with a connecting piece (202). A channel is provided on the outer surface of the connecting piece (202). A nozzle (203) is installed inside the channel. An opening is provided on the outer surface of the housing (201). A rubber airbag (204) is fitted inside the housing (201). A key position (205) is fitted on the outer surface of the rubber airbag (204). The key position (205) is slidably connected inside the opening. An installation hole is provided on the outer surface of the connecting plate (12). The connecting piece (202) is rotatably connected inside the installation hole.

2. The acoustic detection device for the outer wall of a pipeline according to claim 1, wherein: A support plate (1201) is provided on the outer surface of one of the connecting plates (12). A second motor (13) is installed on the upper surface of the support plate (1201). The output end of the second motor (13) is installed with a connecting piece (202) through a coupling.

3. The acoustic detection device for the outer wall of a pipeline according to claim 1, characterized in that: A number of auxiliary components (3) are fitted on the inner surface of the housing (201). The auxiliary component (3) includes a mounting seat (301). The mounting seat (301) is installed on the inner surface of the housing (201) by bolts. One end of the mounting seat (301) is fitted with a side plate (302). A sliding groove is provided on the outer surface of the mounting seat (301). A guide rod (303) is installed on the inner surface of the sliding groove. The other end of the guide rod (303) is installed on the outer surface of the side plate (302).

4. The acoustic detection device for the outer wall of a pipeline according to claim 3, characterized in that: A moving block (304) is slidably connected to the outer surface of the guide rod (303). Two moving blocks (304) are provided and are symmetrically distributed. A connecting rod (305) is hinged to the upper surface of the moving block (304). The other end of the connecting rod (305) is hinged to an abutting plate (306). The outer surface of the abutting plate (306) abuts against the outer surface of the rubber airbag (204).

5. The acoustic detection device for the outer wall of a pipeline according to claim 4, characterized in that: Two springs (307) are sleeved on the outer surface of the guide rod (303). One end of one of the springs (307) abuts against the outer surface of the side plate (302). The other end of the spring (307) abuts against the outer surface of one of the moving blocks (304). One end of the other spring (307) abuts against the inner surface of the sliding groove. The other end of the spring (307) abuts against the outer surface of the other moving block (304).

6. The acoustic detection device for the outer wall of a pipeline according to claim 1, wherein: Anti-slip stripes are provided on the outer surface of the key position (205).

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