Pipeline weld detection device

Abstract

The present application provides a pipeline weld detection device, which relates to the field of pipeline detection. It includes: a receiving pipe, a walking assembly is arranged on the receiving pipe, and a detection assembly is arranged on the receiving pipe; the walking assembly includes: a support tube, a support rod, a universal wheel and a support spring, the support tube is arranged on the receiving pipe, one end of the support rod is telescoped in the support tube, and the other end is connected to the universal wheel, and the universal wheel abuts against the inner wall of the pipeline, and the support spring is fixed between the support rod and the inner wall of the support tube. The present application has the effect of effectively detecting the joints of the pipeline.

Description

Technical Field

[0001] The present application relates to the field of pipeline detection, and in particular to a pipeline weld detection device. Background Art

[0002] Pipelines are devices used to transport gas, liquid or fluids with solid particles, and pipelines used in municipal engineering are also called "municipal pipelines". Common municipal pipeline projects include: water supply pipelines, drainage pipelines, gas pipelines, thermal pipelines, etc.

[0003] Among them, water supply pipes and drainage pipes are generally buried underground for water transportation; water supply pipes and drainage pipes are generally welded or spliced ​​with steel pipes or concrete pipes to achieve the effect of long-distance water transportation.

[0004] When steel pipes are used as pipelines for water transportation, multiple sections of pipes are usually welded to achieve a splicing effect, which makes it easier to transport water. However, after a long period of water transportation, the welded joints between the pipes may be easily damaged due to corrosion and other factors, which may easily cause leakage; therefore, it is necessary to regularly inspect the joints of the pipes.

[0005] At present, the method for inspecting pipelines buried underground is generally as follows: fix the camera on a trolley, then place the trolley in the pipeline, and maneuver the trolley to the joint of the pipeline, then use the camera to shoot the joint, and finally take out the trolley and identify the image taken by the camera to determine whether the joint is damaged.

[0006] However, since the pipeline is buried underground, the internal working environment of the pipeline is relatively complex, and the distance between pipelines is generally long, that is, the distance that the camera carried by the cart moves is long, which will easily cause the camera on the cart to be contaminated, causing the images taken by subsequent cameras to be blurred, making it difficult to perform effective identification later. Summary of the invention

[0007] In order to improve the problems existing in the above pipeline joint detection technology, the present application provides a pipeline weld detection device.

[0008] The present application provides a pipeline weld detection device, which adopts the following technical solution:

[0009] A pipeline weld detection device is used to detect the joints of a pipeline, comprising: a receiving pipe, a traveling assembly is arranged on the receiving pipe, and a detection assembly is arranged on the receiving pipe;

[0010] The walking assembly includes: a support tube, a support rod, a universal wheel and a support spring. The support tube is arranged on the receiving tube. One end of the support rod is telescoped in the support tube, and the other end is connected to the universal wheel. The universal wheel abuts against the inner wall of the pipe. The support spring is fixed between the support rod and the inner wall of the support tube.

[0011] By adopting the above technical solution, during detection, the receiving tube is moved until the receiving tube moves to the joint of the pipeline, and then the air tightness of the pipeline joint is detected using the detection component. The detection component is not easily contaminated like a camera shooting, resulting in ineffective identification.

[0012] Optionally, the detection component includes: an inflation part and two sealing parts, the sealing part includes: a ring plate, a first bladder ring, a sealing gasket and a first pressure sensor, the first pressure sensor is fixed on the receiving tube, the ring plate is sleeved on the receiving tube, and an air inlet cavity is provided inside the ring plate, and an air supply hole connected to the air inlet cavity is opened on the side wall of the ring plate, the first bladder ring is fixedly sleeved on the ring plate, and the first bladder ring is connected to the air inlet cavity, the sealing gasket is fixedly sleeved on the first bladder ring, and the inflation part is arranged between the receiving tube and the ring plate.

[0013] By adopting the above technical solution, the air inlet cavity is inflated, and the gas will continuously enter the first bag circle and enter between the two ring plates through the air delivery hole until the sealing gasket is tightly pressed against the inner wall of the pipeline and there is a certain pressure between the two ring plates; then it is left to stand for a period of time. During this process, the first pressure sensor will detect whether the pressure value between the two ring plates changes. If it changes, it proves that the joint of the pipeline is damaged and needs to be repaired in time.

[0014] Optionally, the inflation part includes: a first air pump, an air supply pipe and an air intake pipe, one end of the air supply pipe is connected to one of the air intake cavities, and the other end is connected to the other air intake cavity, the first air pump is installed in the receiving tube, one end of the air intake pipe is connected to the first air pump, and the other end is connected to the air supply pipe.

[0015] By adopting the above technical solution, the air inlet chamber can be inflated by starting the first air pump.

[0016] Optionally, a cleaning assembly is provided on the receiving tube, and the cleaning assembly includes: a rotating part, a pushing part and a cleaning part, the rotating part includes: a rotating plate, a driving motor and two first bearings, a accommodating groove is opened through the receiving tube, the inner ring of the first bearing is fixed to the inner wall of the accommodating groove, the rotating plate is located between the two first bearings, and the rotating plate is fixed to the outer ring of the first bearing, the driving motor is installed in the receiving tube, and the output shaft of the driving motor is coaxially fixed to the rotating plate, the cleaning part is arranged on the rotating plate, and the pushing part is arranged between the cleaning part and the rotating plate.

[0017] By adopting the above technical solution, the driving motor is started to drive the rotating plate to rotate, so that the cleaning part can clean the inner wall of the pipeline.

[0018] Optionally, the cleaning part includes: a receiving rod and a scraper, the receiving rod is slidably arranged on the rotating plate, the scraper is arranged on the receiving rod, and the pushing part is arranged between the receiving rod and the rotating plate.

[0019] By adopting the above technical solution, when the rotating plate rotates at a high speed, the receiving rod will be thrown to the edge of the rotating plate by the centrifugal force. In this process, the pushing part pushes the scraper away from the receiving rod so as to extend to the abutment between the sealing gasket and the inner wall of the pipe; at this time, the scraper abuts against the inner wall of the pipe, so that the scraper continuously cleans the contact position between the sealing gasket and the inner wall of the pipe, so that it is not easy for the sealing gasket to be unable to fully fit with the inner wall of the pipe due to dirt left on the inner wall of the pipe, thereby improving the sealing performance when the sealing gasket is tightly attached to the inner wall of the pipe.

[0020] Optionally, the pushing part includes: a screw rod, an anti-rotation rod, a pushing gear and a pushing rack, a placement groove is provided on the rotating plate, the pushing rack is fixed in the placement groove, a clearance hole is penetrated through the receiving rod, a threaded hole is provided on the scraper, and a connecting hole is provided on the receiving rod. The screw rod is rotatably installed in the clearance hole and one end is threadedly connected to the threaded hole, and the other end extends into the placement groove and is coaxially fixed with the pushing gear, and the pushing gear is meshed with the pushing rack, one end of the anti-rotation rod is slidably connected to the connecting hole, and the other end is fixed to the scraper.

[0021] By adopting the above technical solution, when the receiving rod slides toward the edge of the rotating plate, the gear is pushed to rotate to drive the screw to rotate; the rotation of the screw will push the scraper to move toward the side away from the receiving rod until it reaches the joint between the sealing gasket and the inner wall of the pipe, thereby performing effective cleaning.

[0022] Optionally, the pushing part further includes: a rotating rod, a recovery rope and a coil spring, the inner wall of the placement slot is provided with a placement hole, the end of the rotating rod is rotatably installed in the placement hole, one end of the recovery rope is fixed to the receiving rod, and the other end is fixed to the rotating rod, the coil spring is sleeved on the rotating rod, one end is fixed to the rotating rod, and the other end is fixed to the inner wall of the placement hole

[0023] By adopting the above technical solution, after the rotating plate stops rotating, the winding spring restores its deformation to drive the rotating rod to reel in the recovery rope; during the reeling process, the recovery rope will pull the receiving rod to reset, and during the resetting process, the pushing gear will rotate again to drive the screw rod to rotate and reset the scraper, thereby not easily affecting the fit between the sealing gasket and the inner wall of the pipe.

[0024] Optionally, the detection component includes: a control unit, a detection unit and an air intake unit, the control unit includes: a rotating plate, a stepper motor and two second bearings, the receiving tube is provided with a mounting groove, the inner ring of the second bearing is fixed to the inner wall of the mounting groove, the rotating plate is located between the two second bearings and is fixed to the outer ring of the second bearing, the stepper motor is installed on the receiving tube, and the output shaft of the stepper motor is coaxially fixed to the rotating plate, the detection unit is arranged on the rotating plate, and the air intake unit is arranged between the rotating plate and the detection unit.

[0025] By adopting the above technical solution, the stepper motor is started to drive the rotating plate to drive the ring frame to rotate a certain angle, and then the detection is performed. This method can divide the joint of the pipeline into several parts for detection, so as to further determine the specific location of the joint damage.

[0026] Optionally, the detection unit includes: a ring frame, a second bladder ring, a rubber pad and a second pressure sensor, the ring frame is fixed on the rotating plate, and an inflation cavity is provided inside the ring frame, an inner wall of the ring frame is provided with an air vent connected to the inflation cavity, the second bladder ring is fixed on the ring frame, and the second bladder ring is connected to the inflation cavity, the rubber pad is fixed on the second bladder ring, the second pressure sensor is fixed on the rotating plate, and the air inlet is arranged between the rotating plate and the inflation cavity.

[0027] By adopting the above technical solution, gas is input into the inflation chamber, and the gas is continuously input into the second bag ring and the ring frame until the rubber pad is tightly pressed against the inner wall of the pipe and a certain pressure is reached in the ring frame; then it is left to stand for a period of time, during which the second pressure sensor will detect whether the pressure value in the ring frame changes. If it changes, it proves that the joint of the pipe is damaged and needs to be repaired in time.

[0028] Optionally, the air intake part includes: a connecting pipe and a second air pump, the second air pump is installed on the rotating plate, one end of the connecting pipe is connected to the inflation chamber, and the other end is connected to the second air pump.

[0029] By adopting the above technical solution, the second air pump can be started to input gas into the inflation chamber.

[0030] In summary, the present application includes at least one of the following beneficial effects:

[0031] 1. During the inspection, move the receiving pipe until it moves to the joint of the pipe, and then use the detection component to detect the air tightness of the pipe joint. The detection component is not easy to be contaminated like the camera shooting, which makes it impossible to effectively identify.

[0032] 2. Start the stepper motor to drive the rotating plate to drive the ring frame to rotate a certain angle, and then perform the test. This method can divide the joint of the pipeline into several parts for testing, so as to further determine the specific location of the joint damage.

[0033] 3. Start the second air pump to input gas into the inflation chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a structural schematic diagram according to Embodiment 1 of the present application;

[0035] Figure 2 yes Figure 1 A schematic side view of

[0036] Figure 3 is along Figure 2 A schematic cross-sectional view taken along the cutting line AA in FIG.

[0037] Figure 4 yes Figure 3 A schematic partial enlarged view of part B;

[0038] Figure 5 is a structural schematic diagram according to Embodiment 2 of the present application;

[0039] Figure 6 is along Figure 5 A schematic cross-sectional view taken along the cutting line CC in FIG.

[0040] In the figure: 1, receiving tube; 11, containing groove; 12, installation groove; 2, walking assembly; 21, supporting tube; 22, supporting rod; 23, universal wheel; 24, supporting spring; 3, sealing part; 31, ring plate; 311, air inlet cavity; 312, air delivery hole; 32, first bag ring; 33, sealing pad; 34, first pressure sensor; 4, inflation part; 41, first air pump; 42, air delivery pipe; 43, air inlet pipe; 5, rotating part; 51, rotating plate; 511, placement groove; 5111, placement hole; 52, driving motor; 53, first bearing; 6, cleaning part; 61, Receiving rod; 611, giving way hole; 612, connecting hole; 62, scraper; 621, threaded hole; 7, pushing part; 71, screw rod; 72, anti-rotation rod; 73, pushing gear; 74, pushing rack; 75, rotating rod; 76, recovery rope; 77, coil spring; 8, control part; 81, rotating plate; 82, stepping motor; 83, second bearing; 9, detection part; 91, ring frame; 911, inflation cavity; 912, ventilation hole; 92, second bag ring; 93, rubber pad; 94, second pressure sensor; 10, air inlet part; 101, connecting pipe; 102, second air pump. DETAILED DESCRIPTION

[0041] An embodiment of the present application provides a pipeline weld detection device.

[0042] Embodiment 1:

[0043] See also Figure 1 A pipeline weld detection device is used for air tightness detection of pipeline joints, comprising: a receiving tube 1, and walking components 2 are arranged on the outer side walls of both ends of the receiving tube 1. The walking components 2 include: a support tube 21, a support rod 22, a universal wheel 23 and a support spring 24. In the embodiment of the present application, there are three groups of walking components 2 at one end of the receiving tube 1, and the three groups of walking components 2 are evenly arranged along the circumferential direction of the receiving tube 1. The support tube 21 is fixed on the outer side wall of the receiving tube 1, one end of the support rod 22 is telescopic in the support tube 21, and the other end is connected to the universal wheel 23.

[0044] See also Figure 2 and Figure 3 One end of the support spring 24 is fixed to the end of the support rod 22 away from the universal wheel 23, and the other end is fixed to the inner wall of the support tube 21. The support spring 24 can push the support rod 22 to extend out of the support tube 21, so that the universal wheel 23 can be pressed against the inner wall of the pipeline, so that the receiving pipe 1 can move stably in the pipeline; and pipelines with different diameters can be tested, thereby improving applicability. In the embodiment of the present application, a traction trolley can be used to pull the receiving pipe 1 during testing (the traction trolley is not shown in the figure).

[0045] See also Figure 3In the embodiment of the present application, two groups of walking components 2 can also be set at the bottom of the receiving tube 1 to support the receiving tube 1.

[0046] See also Figure 3 A detection component for pipeline joint detection is arranged on the receiving pipe 1, and the detection component includes: an inflation part 4 and two sealing parts 3.

[0047] See also Figure 3 The sealing part 3 includes: a ring plate 31, a first bag ring 32, a sealing pad 33 and a first pressure sensor 34. The ring plate 31 is fixedly sleeved on the receiving tube 1, and a distance is left between the two ring plates 31. An annular air inlet cavity 311 is arranged inside the ring plate 31. A gas delivery hole 312 is opened on the side where the two ring plates 31 are close to each other, and the gas delivery hole 312 is connected to the air inlet cavity 311. The first bag ring 32 is fixedly sleeved on the ring plate 31, and the first bag ring 32 is connected to the air inlet cavity 311 by a tube. In the embodiment of the present application, the first bag ring 32 can be made of latex or other materials so that it can be expanded.

[0048] See also Figure 3 The sealing gasket 33 is fixedly mounted on the first bag ring 32. After the first bag ring 32 expands, the sealing gasket 33 can directly press against the inner wall of the pipe, thereby improving the sealing between the first bag ring 32 and the inner wall of the pipe. In the embodiment of the present application, the sealing gasket 33 can be made of rubber or other materials. The first pressure sensor 34 is fixedly mounted on the outer wall of the receiving pipe 1 and is located between the two ring plates 31. In the embodiment of the present application, the first pressure sensor 34 is generally connected to the controller during actual detection so as to record the detection data.

[0049] During the inspection, first move the receiving tube 1 until the joint of the pipeline is located between the two ring plates 31, and then inflate the air inlet chamber 311. The gas will continuously enter the first bag ring 32 and enter between the two ring plates 31 through the air delivery hole 312 until the sealing gasket 33 is tightly pressed against the inner wall of the pipeline and there is a certain pressure between the two ring plates 31; then let it stand for a while. During this process, the first pressure sensor 34 will detect whether the pressure value between the two ring plates 31 changes. If it changes, it proves that the joint of the pipeline is damaged and needs to be repaired in time. In addition, this detection method is not easy to be contaminated like the method of camera shooting, which makes it impossible to effectively identify.

[0050] See also Figure 3The inflation part 4 includes: a first air pump 41, an air delivery pipe 42 and an air inlet pipe 43. One end of the air delivery pipe 42 is connected to one of the air inlet chambers 311, and the other end is connected to the other air inlet chamber 311. The first air pump 41 is fixedly mounted on the receiving tube 1. One end of the air inlet pipe 43 is connected to the air delivery pipe 42, and the other end is connected to the first air pump 41. After the receiving tube 1 is moved into place, the first air pump 41 is started to inflate the air inlet chamber 311. The gas will continuously enter the first bag ring 32 and enter between the two ring plates 31 through the air delivery hole 312, so that the sealing pad 33 is pressed against the inner wall of the pipe, and a certain pressure can be generated between the two ring plates 31.

[0051] In the embodiment of the present application, an air outlet pipe is provided on any ring plate 31 connected to the air inlet cavity 311, and a solenoid valve is provided on the air outlet pipe. After a joint is detected, the solenoid valve opens the air outlet pipe to release the gas, thereby facilitating the detection of the next joint. In the embodiment of the present application, electrical equipment such as the solenoid valve and the first air pump 41 can be set to wireless remote control. In the embodiment of the present application, the sealing performance of the sealing gasket 33 can be pre-detected before detection.

[0052] See also Figure 3 The receiving tube 1 is provided with a cleaning assembly. In the embodiment of the present application, the cleaning assembly is provided with two groups, which are respectively located at the two ends of the receiving tube 1 and between the walking assembly 2. The cleaning assembly includes: a rotating part 5, a pushing part 7 and a cleaning part 6.

[0053] See also Figure 3 The rotating part 5 includes: a rotating plate 51, a driving motor 52 and two first bearings 53. The inner ring of the first bearing 53 is fixed to the inner side wall of the receiving groove 11. The rotating plate 51 is located between the two first bearings 53, and the rotating plate 51 is fixed to the outer ring of the first bearing 53. The driving motor 52 is fixedly installed in the receiving pipe 1, and the output shaft of the driving motor 52 is coaxially fixed with the rotating plate 51. The driving motor 52 is started to drive the rotating plate 51 to rotate, so that the cleaning part 6 can clean the inner wall of the pipeline.

[0054] See also Figure 3The cleaning part 6 includes: a receiving rod 61 and a scraper 62. The receiving rod 61 is slidably connected to the side of the rotating plate 51 close to the ring plate 31, and the receiving rod 61 slides along the radial direction of the rotating plate 51. In the embodiment of the present application, the receiving rod 61 is in an "L" shape. The scraper 62 is arranged at one end of the receiving rod 61 away from the rotating plate 51. When the driving motor 52 drives the rotating plate 51 to rotate at a high speed, the receiving rod 61 will be thrown to the edge of the rotating plate 51 by the centrifugal force; at this time, the scraper 62 abuts against the inner wall of the pipe, so that the scraper 62 continuously cleans the contact position between the sealing gasket 33 and the inner wall of the pipe, so that it is not easy for the inner wall of the pipe to leave dirt, which causes the sealing gasket 33 to be unable to completely fit with the inner wall of the pipe, thereby improving the sealing performance when the sealing gasket 33 is tightly attached to the inner wall of the pipe.

[0055] See also Figure 4 The pushing part 7 includes: a screw rod 71, an anti-rotation rod 72, a pushing gear 73 and a pushing rack 74. A placement groove 511 is provided on the side of the rotating plate 51 close to the ring plate 31 and along the radial direction of the rotating plate 51. The pushing rack 74 is fixed in the placement groove 511 and arranged along the length direction of the placement groove 511. A clearance hole 611 is provided through the side wall of the receiving rod 61. A connecting hole 612 is provided on the side of the receiving rod 61 close to the scraper 62. A threaded hole 621 is provided on the side of the scraper 62 close to the receiving rod 61. The screw rod 71 is rotatably installed in the clearance hole 611, one end of which is threadedly connected to the threaded hole 621, and the other end extends into the placement groove 511 and is coaxially fixed with the pushing gear 73, and the pushing gear 73 is meshed with the pushing rack 74.

[0056] See also Figure 4 One end of the anti-rotation rod 72 is slidably connected to the connection hole 612 and slides along the length direction of the connection hole 612, and the other end is fixed to the side of the scraper 62 close to the receiving rod 61. When the screw rod 71 rotates, the scraper 62 is not easy to rotate with the screw rod 71. When the receiving rod 61 slides toward the edge of the rotating plate 51, the driving gear 73 rotates to drive the screw rod 71 to rotate; the rotation of the screw rod 71 will push the scraper 62 to move toward the side away from the receiving rod 61 until it reaches the joint between the sealing pad 33 and the inner wall of the pipe, thereby effectively cleaning.

[0057] See also Figure 4 The pusher 7 further includes: a rotating rod 75, a recovery rope 76 and a coil spring 77. The inner side wall of the placement groove 511 near one end of the receiving tube 1 is provided with a placement hole 5111, and the end of the rotating rod 75 is rotatably installed in the placement hole 5111. One end of the recovery rope 76 is fixed to the receiving rod 61, and the other end is fixed to the rotating rod 75.

[0058] See also Figure 4The coil spring 77 is sleeved on one end of the rotating rod 75 located in the placement hole 5111, and one end is fixed to the rotating rod 75, and the other end is fixed to the inner wall of the placement hole 5111. In the embodiment of the present application, the centrifugal force when the rotating plate 51 rotates is greater than the deformation force of the coil spring 77. After the rotating plate 51 stops rotating, the coil spring 77 recovers its deformation to drive the rotating rod 75 to reel the recovery rope 76; during the reeling process, the recovery rope 76 will pull the receiving rod 61 to reset, and during the resetting process, the pushing gear 73 will rotate again to drive the screw rod 71 to rotate and reset the scraper 62, so that it is not easy to affect the sealing gasket 33 and the inner wall of the pipeline.

[0059] The working process of the first embodiment is as follows: during the inspection, the receiving tube 1 is first moved until the joint of the pipeline is located between the two ring plates 31, and then the air inlet cavity 311 is inflated, and the gas will continuously enter the first bag ring 32 and enter between the two ring plates 31 through the air delivery hole 312 until the sealing gasket 33 is tightly pressed against the inner wall of the pipeline and there is a certain pressure between the two ring plates 31; then it is left to stand for a period of time. During this process, the first pressure sensor 34 will detect whether the pressure value between the two ring plates 31 changes. If it changes, it proves that the joint of the pipeline is damaged and needs to be repaired in time. In addition, this detection method is not easy to be contaminated like the method of camera shooting, which makes it impossible to effectively identify.

[0060] Embodiment 2:

[0061] See also Figure 5 and Figure 6 The difference between this embodiment and the first embodiment is that the detection component includes: a control unit 8, a detection unit 9 and an air intake unit 10.

[0062] See also Figure 6 The control unit 8 includes: a rotating plate 81, a stepper motor 82 and two second bearings 83. The outer wall of the receiving tube 1 is penetrated with an annular mounting groove 12, and the inner ring of the second bearing 83 is fixedly connected to the inner wall of the mounting groove 12. The rotating plate 81 is located between the two second bearings 83, and the rotating plate 81 is fixed to the outer ring of the second bearing 83. The stepper motor 82 is fixedly installed in the receiving tube 1, and the output shaft of the stepper motor 82 is coaxially fixed with the rotating plate 81. The stepper motor 82 is used to drive the rotating plate 81 to rotate at a certain angle.

[0063] See also Figure 6The detection unit 9 includes: a ring frame 91, a second bag ring 92, a rubber pad 93 and a second pressure sensor 94. The ring frame 91 is fixed to the peripheral wall of the rotating plate 81, and the end of the ring frame 91 away from the rotating plate 81 is arc-shaped; an annular air-filled cavity 911 is arranged inside the ring frame 91, and a vent hole 912 is opened on the inner side wall of the ring frame 91, and the vent hole 912 is connected to the air-filled cavity 911. The second bag ring 92 is fixed to the end wall of the end of the ring frame 91 away from the rotating plate 81, and the second bag is connected to the air-filled cavity 911 through a tube. In the embodiment of the present application, the second bag ring 92 is made of the same material as the first bag ring 32.

[0064] See also Figure 6 The rubber pad 93 is fixed to the side of the second bag ring 92 away from the ring frame 91. The rubber pad 93 is used to be in close contact with the inner wall of the pipe, which can not only protect the second bag ring 92, but also improve the sealing between the second bag ring 92 and the inner wall of the pipe. The second pressure sensor 94 is fixed to the peripheral wall of the rotating plate 81 and is located in the ring frame 91. In the embodiment of the present application, the ring frame 91 is also provided with an air outlet pipe connected to the inflation chamber 911, and an electromagnetic valve is provided on the air outlet pipe.

[0065] See also Figure 6 The air inlet 10 includes: a connecting pipe 101 and a second air pump 102. The second air pump 102 is installed on the side wall of the rotating plate 81. One end of the connecting pipe 101 is connected to the inflation chamber 911, and the other end is connected to the second air pump 102. During the detection, the second air pump 102 is started to input gas into the inflation chamber 911. The gas is continuously input into the second bag ring 92 and the ring frame 91 until the rubber pad 93 is tightly against the inner wall of the pipeline and there is a certain pressure in the ring frame 91; then it is left to stand for a period of time. During this process, the second pressure sensor 94 will detect whether the pressure value in the ring frame 91 changes. If it changes, it proves that the joint of the pipeline is damaged and needs to be repaired in time; after the detection is completed, the stepper motor 82 is started to drive the rotating plate 81 to drive the ring frame 91 to rotate a certain angle, and then the detection steps are repeated to perform the detection. This method can divide the joint of the pipeline into several parts for detection, so as to further determine the specific location of the joint damage.

[0066] The working process of the second embodiment is as follows: during detection, the second air pump 102 is started to input gas into the inflation chamber 911, and the gas is continuously input into the second bag ring 92 and the ring frame 91 until the rubber pad 93 is tightly pressed against the inner wall of the pipe and there is a certain pressure in the ring frame 91; then it is left to stand for a period of time. During this process, the second pressure sensor 94 will detect whether the pressure value in the ring frame 91 changes. If it changes, it proves that the joint of the pipe is damaged and needs to be repaired in time.

[0067] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pipeline weld detection device, used for detecting the joints of a pipeline, characterized in that: include: A receiving tube (1), a walking assembly (2) being arranged on the receiving tube (1), and a detection assembly being arranged on the receiving tube (1); The walking assembly (2) comprises: a support tube (21), a support rod (22), a universal wheel (23) and a support spring (24); the support tube (21) is arranged on the receiving tube (1); one end of the support rod (22) is telescopic in the support tube (21) and the other end is connected to the universal wheel (23); the universal wheel (23) is in contact with the inner wall of the pipe; the support spring (24) is fixed between the support rod (22) and the inner wall of the support tube (21); The receiving tube (1) is provided with a cleaning assembly, the cleaning assembly comprising: a rotating part (5), a pushing part (7) and a cleaning part (6), the rotating part (5) comprising: a rotating plate (51), a driving motor (52) and two first bearings (53), a receiving groove (11) is provided through the receiving tube (1), the inner ring of the first bearing (53) is fixed to the inner wall of the receiving groove (11), the rotating plate (51) is located between the two first bearings (53), and the rotating plate (51) is fixed to the outer ring of the first bearing (53), the driving motor (52) is installed in the receiving tube (1), and the output shaft of the driving motor (52) is coaxially fixed to the rotating plate (51), the cleaning part (6) is arranged on the rotating plate (51), and the pushing part (7) is arranged between the cleaning part (6) and the rotating plate (51); The cleaning part (6) comprises: a receiving rod (61) and a scraper (62), wherein the receiving rod (61) is slidably arranged on the rotating plate (51), the scraper (62) is arranged on the receiving rod (61), and the pushing part (7) is arranged between the receiving rod (61) and the rotating plate (51); The pushing part (7) comprises: a screw rod (71), an anti-rotation rod (72), a pushing gear (73) and a pushing rack (74); a placement groove (511) is provided on the rotating plate (51); the pushing rack (74) is fixed in the placement groove (511); a clearance hole (611) is provided through the receiving rod (61); a threaded hole (621) is provided on the scraper (62); and a connecting hole is provided on the receiving rod (61). (612), the screw rod (71) is rotatably installed in the clearance hole (611) and one end is threadedly connected to the threaded hole (621), the other end extends into the placement groove (511) and is coaxially fixed with the pushing gear (73), and the pushing gear (73) is meshed with the pushing rack (74), one end of the anti-rotation rod (72) is slidably connected to the connecting hole (612), and the other end is fixed to the scraper (62); The pushing part (7) further comprises: a rotating rod (75), a recovery rope (76) and a coil spring (77); the inner wall of the placement groove (511) is provided with a placement hole (5111); the end of the rotating rod (75) is rotatably installed in the placement hole (5111); one end of the recovery rope (76) is fixed to the receiving rod (61) and the other end is fixed to the rotating rod (75); the coil spring (77) is sleeved on the rotating rod (75) and one end is fixed to the rotating rod (75) and the other end is fixed to the inner wall of the placement hole (5111).

2. The pipeline weld detection device according to claim 1, characterized in that: The detection component comprises: an inflation part (4) and two sealing parts (3); the sealing part (3) comprises: a ring plate (31), a first bag ring (32), a sealing pad (33) and a first pressure sensor (34); the first pressure sensor (34) is fixed on the receiving tube (1); the ring plate (31) is sleeved on the receiving tube (1); an air inlet cavity (311) is provided inside the ring plate (31); a side wall of the ring plate (31) is provided with an air delivery hole (312) connected to the air inlet cavity (311); the first bag ring (32) is fixedly sleeved on the ring plate (31); the first bag ring (32) is connected to the air inlet cavity (311); the sealing pad (33) is fixedly sleeved on the first bag ring (32); and the inflation part (4) is provided between the receiving tube (1) and the ring plate (31).

3. The pipeline weld detection device according to claim 2, characterized in that: The inflation portion (4) comprises: a first air pump (41), an air delivery pipe (42) and an air intake pipe (43); one end of the air delivery pipe (42) is connected to one of the air intake cavities (311), and the other end is connected to the other air intake cavity (311); the first air pump (41) is installed in the receiving pipe (1); one end of the air intake pipe (43) is connected to the first air pump (41), and the other end is connected to the air delivery pipe (42).

4. The pipeline weld detection device according to claim 1, characterized in that: The detection component comprises: a control unit (8), a detection unit (9) and an air intake unit (10); the control unit (8) comprises: a rotating plate (81), a stepper motor (82) and two second bearings (83); a mounting groove (12) is provided through the receiving tube (1); the inner ring of the second bearing (83) is fixed to the inner wall of the mounting groove (12); the rotating plate (81) is located between the two second bearings (83) and is fixed to the outer ring of the second bearing (83); the stepper motor (82) is installed on the receiving tube (1), and the output shaft of the stepper motor (82) is coaxially fixed to the rotating plate (81); the detection unit (9) is arranged on the rotating plate (81); and the air intake unit (10) is arranged between the rotating plate (81) and the detection unit (9).

5. The pipeline weld detection device according to claim 4, characterized in that: The detection part (9) includes: a ring frame (91), a second bag ring (92), a rubber pad (93) and a second pressure sensor (94); the ring frame (91) is fixed on the rotating plate (81), and an inflation chamber (911) is arranged inside the ring frame (91); an air vent (912) connected to the inflation chamber (911) is opened on the inner wall of the ring frame (91); the second bag ring (92) is fixed on the ring frame (91), and the second bag ring (92) is connected to the inflation chamber (911); the rubber pad (93) is fixed on the second bag ring (92); the second pressure sensor (94) is fixed on the rotating plate (81); and the air inlet part (10) is arranged between the rotating plate (81) and the inflation chamber (911).

6. The pipeline weld detection device according to claim 5, characterized in that: The air intake portion (10) comprises: a connecting pipe (101) and a second air pump (102); the second air pump (102) is mounted on the rotating plate (81); one end of the connecting pipe (101) is connected to the inflation chamber (911), and the other end is connected to the second air pump (102).

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