Crawler for pipeline welding seam detection

Abstract

The utility model provides a crawler for pipeline welding seam detection, which comprises a crawling trolley, an adjusting assembly is arranged between the crawling trolley and a moving roller, a worm can drive a first supporting rod and a second supporting rod on the left side and the right side to synchronously move outwards through a worm gear and a double-thread lead screw by rotating the worm forwards, and similarly, the worm can drive the first supporting rod and the second supporting rod to move outwards through the worm gear and the double-thread lead screw. When the worm is reversely rotated, the two groups of first supporting rods and second supporting rods on the left side and the right side can synchronously move towards the inner side, so that the creeper-traveler can conveniently move and use in to-be-detected pipelines with different thicknesses by virtue of the moving rollers; in the same way, when the adjusting nut is rotated forwards, the adjusting supporting rod can drive the top guide wheel to move upwards together through the bearing plate, and therefore the auxiliary guide assembly can be conveniently used in to-be-detected pipelines with different thicknesses to limit the creeper-traveler.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline weld detection, in particular to a crawler used for pipeline weld detection. Background Art

[0002] A pipeline is a device connected by pipes, pipe connectors and valves for transporting gas, liquid or fluid with solid particles. It is mainly used in water supply, drainage, heating, gas supply, long-distance transportation of oil and natural gas, agricultural irrigation, hydraulic engineering and various industrial installations. After the pipeline is welded, a crawler is needed to detect the internal weld of the pipeline to ensure the normal use of the pipeline.

[0003] Publication number "CN217762650U" provides a pipeline crawler for pipeline inspection. By setting a lower fixed seat, a connecting rod, a support plate, an upper fixed seat, rollers and a buffer assembly, the invention solves the problem that when a common pipeline crawler is used for pipeline inspection, the crawler as a whole will be bumpy when crawling inside a complex pipeline, which affects the quality of shooting and inspection and causes rollover due to severe bumps.

[0004] However, the above technical solutions and the prior art have the following defects:

[0005] Although the crawler can solve the problem of overturning caused by bumps when crawling inside a complex pipeline through a buffer component, the buffer component is not adjustable. Pipes of different sizes have different squeezing forces on the buffer component. When the inner diameter of the pipeline is small, the squeezing force on the buffer component will increase, causing the buffer component to exert greater resistance to the movement of the crawler, thereby preventing the crawler from moving smoothly. Secondly, the spacing between the moving wheels on both sides of the crawler is not adjustable, so that the crawler cannot move well inside pipelines of different diameters, and its scope of application is limited. Utility Model Content

[0006] The utility model aims to provide a crawler for pipeline weld detection to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A crawler for pipeline weld detection, comprising a pipeline to be tested, a crawler, a mobile roller, a panoramic camera, an ultrasonic flaw detector and a detection head, wherein the crawler is inserted into the pipeline to be tested, and the mobile rollers are symmetrically installed on the left and right sides of the crawler, a panoramic camera is installed on the right side of the front end face of the crawler, an ultrasonic flaw detector is installed on the rear side of the upper end face of the crawler, and a detection head is installed on the rear end face of the crawler, an auxiliary guide component is provided on the upper end face of the crawler, and the auxiliary guide component is used to vertically limit the crawler to avoid up and down displacement or shaking of the crawler during the forward and backward movement, an adjustment component is provided between the crawler and the mobile roller, and the adjustment component is used to adjust and support the spacing between the mobile rollers, so that the crawler can be moved and used inside pipelines to be tested with different diameters.

[0009] Preferably, the adjustment assembly includes a first strut, a double-threaded screw, a worm wheel, a worm, a second strut and an internal threaded hole. The first strut is installed on the left side of the crawling vehicle, and the second strut is installed on the right side of the crawling vehicle. Internal threaded holes are provided inside the first strut and the second strut, and a double-threaded screw is installed inside the internal threaded hole. A worm wheel is provided in the middle position of the annular side surface of the double-threaded screw, and a worm is meshed with the upper side of the annular side surface of the worm wheel.

[0010] Preferably, the auxiliary guide assembly includes a supporting plate, a top guide wheel, an adjusting nut, a supporting tube and an adjusting strut; a supporting tube is provided in the middle position of the upper end surface of the crawler vehicle; an adjusting strut is installed inside the supporting tube; an adjusting nut is installed on the annular side surface of the adjusting strut; a supporting plate is provided on the upper end of the adjusting strut; and top guide wheels are symmetrically provided on both sides of the upper end face of the supporting plate.

[0011] Preferably, a limiting ring is provided on the right side of the annular side of the double-threaded screw, and blocking covers are symmetrically installed on the front and rear sides inside the crawler vehicle. The rotation direction of the external thread on the left side of the annular side of the double-threaded screw is opposite to that of the external thread on the right side of the annular side.

[0012] Preferably, the upper end faces of the first support rod and the second support rod are both provided with limit blocks, the left and right end faces of the crawler vehicle are symmetrically equipped with anti-slip frames, the front end of the worm is provided with a hand turntable, the front side of the annular side of the worm is provided with an anti-slip ring, and the front end face of the crawler vehicle is equipped with an anti-slip ring.

[0013] Preferably, a limiting groove is provided on the left side of the annular side of the adjustment support rod, a guide block is provided on the left side of the inner annular side of the support tube, and the guide block matches the limiting groove, and a reinforcement plate is provided on the lower side of the annular side of the support tube.

[0014] Preferably, a roller support shaft is installed inside the movable roller, and the roller support shaft is a rotatable structure, and connecting rings are provided on the front and rear end surfaces of the crawler.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. Before the crawler enters the pipeline to be tested for weld inspection, the worm can be rotated forward so that the worm can drive the first support rod and the second support rod on the left and right sides to move outward synchronously through the worm wheel and the double-threaded screw. At this time, the distance between the moving rollers on the left and right sides will increase, so that the moving rollers can roll inside the pipeline to be tested with a thick diameter. Similarly, when the worm is reversed, the two groups of first support rods and second support rods on the left and right sides will move inward synchronously. At this time, the distance between the moving rollers on the left and right sides will decrease, so that the moving rollers can roll inside the pipeline to be tested with a thin diameter, so that the crawler can be moved and used inside the pipelines to be tested with different thicknesses with the help of the moving rollers, making the crawler more applicable.

[0017] 2. Before the crawler enters the pipeline to be tested for weld inspection, the adjusting nut can be reversed to drive the top guide wheel down through the adjusting strut and the supporting plate. Similarly, when the adjusting nut is rotated forward, the adjusting strut will drive the top guide wheel to move up through the supporting plate, so that the top guide wheel can roll inside the pipeline to be tested with a thick diameter, thereby facilitating the use of the auxiliary guide assembly inside the pipelines to be tested of different thicknesses to limit the crawler, avoiding up and down displacement of the crawler when moving inside the pipeline to be tested, and making the crawler more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 It is a structural diagram of the auxiliary guide component and the adjustment component in the utility model;

[0020] Figure 3 It is a front cross-sectional view of the auxiliary guide assembly and the adjustment assembly in the utility model;

[0021] Figure 4 It is a structural diagram of the adjustment component in the utility model;

[0022] Figure 5 It is a structural diagram of the auxiliary guide component in the utility model.

[0023] In the figure: 1. pipeline to be tested; 2. auxiliary guide assembly; 21. support plate; 22. top guide wheel; 23. adjustment nut; 24. support tube; 241. reinforcement sheet; 242. guide block; 25. adjustment support rod; 251. limit groove; 3. crawler; 31. connecting ring; 4. moving roller; 41. roller support shaft; 5. adjustment assembly; 51. first support rod; 52. anti-slip stop frame; 53. anti-slip stop ring; 54. hand turntable; 55. double-threaded screw; 551. limit ring; 56. worm gear; 57. blocking cover; 58. worm; 581. anti-slip ring; 59. second support rod; 591. internal threaded hole; 511. limit block; 6. panoramic camera; 7. ultrasonic flaw detector; 8. detection head. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-5 , the utility model provides a technical solution:

[0026] Embodiment 1:

[0027] A crawler for pipeline weld detection, comprising a pipeline to be tested 1, a crawler 3, a mobile roller 4, a panoramic camera 6, an ultrasonic flaw detector 7 and a detection head 8, wherein the crawler 3 is inserted into the pipeline to be tested 1, and the crawler 3 can drive the panoramic camera 6 and the detection head 8 to move inside the pipeline to be tested 1, and the crawler 3 is symmetrically installed with mobile rollers 4 on the left and right sides of the crawler 3, and the mobile rollers 4 are installed in four groups, and the four groups of mobile rollers 4 have the same specifications, and the four groups of mobile rollers 4 enable the crawler 3 to be movable, and a panoramic camera 6 is installed on the right side of the front end of the crawler 3, and the panoramic camera 6 is connected to the external monitoring display through a signal line The panoramic camera 6 is connected to the device. When working, it can capture images of the surroundings and transmit them to the external monitoring display in real time, so that the staff can observe the internal situation of the pipeline 1 to be tested in real time. An ultrasonic flaw detector 7 is installed on the rear side of the upper end surface of the crawling vehicle 3, and a detection head 8 is installed on the rear end surface of the crawling vehicle 3. The detection head 8 is connected to the ultrasonic flaw detector 7 through a wire. When working, the ultrasonic flaw detector 7 can use the detection head 8 to perform flaw detection on the surrounding welds of the pipeline 1 to be tested. Since the internal detailed structure and working principle of the ultrasonic flaw detector 7 and the detection head 8 are relatively mature technologies in the existing technology, they will not be described in detail here.

[0028] An auxiliary guide assembly 2 is provided on the upper end surface of the crawler 3, and the auxiliary guide assembly 2 is used to vertically limit the crawler 3 to prevent the crawler 3 from shifting up and down or shaking during the forward and backward movement. An adjustment assembly 5 is provided between the crawler 3 and the mobile roller 4, and the adjustment assembly 5 is used to adjust and support the spacing of the mobile roller 4, so that the crawler 3 can be moved inside the pipeline 1 to be tested with different diameters. A roller support shaft 41 is installed inside the mobile roller 4, and the roller support shaft 41 is a rotatable structure. Four groups of support shafts 41 are installed, and the specifications of the four groups of roller support shafts 41 are the same. The four groups of rotatable roller support shafts 41 enable the four groups of movable rollers 4 to be rotatable. Connecting rings 31 are provided on the front and rear end faces of the crawler vehicle 3. The connecting rings 31 are connected to the crawler vehicle 3 by welding. The connecting rings 31 are convenient for the inspection personnel to pull and move the crawler vehicle 3 with the help of an external pulling rope. Anti-detachment covers are installed on the left end of the first support rod 51 and the right end of the second support rod 59. The anti-detachment covers prevent the roller support shafts 41 from loosening and falling off during rotation and use.

[0029] The adjustment assembly 5 includes a first support rod 51, a double-threaded screw 55, a worm wheel 56, a worm 58, a second support rod 59 and an internal threaded hole 591. The first support rod 51 is installed on the left side of the crawler vehicle 3. Two groups of the first support rod 51 are installed, and the two groups of the first support rod 51 have the same specifications. The first support rod 51 can support the roller support shaft 41 on the left side of the crawler vehicle 3. The second support rod 59 is installed on the right side of the crawler vehicle 3. The second support rod 59 has the same specifications as the first support rod 51. Two groups of the second support rod 59 are installed, and the two groups of the second support rod 59 have the same specifications. The second support rod 59 can support the roller support shaft 41 on the right side of the crawler vehicle 3. An internal threaded hole 591 is provided inside the first support rod 51 and the second support rod 59, and the internal threaded hole 591 is meshed with the double-threaded screw rod 55. The internal threaded hole 591 facilitates the double-threaded screw rod 55 to drive the first support rod 51 and the second support rod 59 to move synchronously in opposite directions. The double-threaded screw rod 55 is installed inside the internal threaded hole 591. The external thread on the left side of the annular side of the double-threaded screw rod 55 rotates in opposite directions to the external thread on the right side of the annular side. The double-threaded screw rod 55, whose external thread on the left side of the annular side rotates in opposite directions to the external thread on the right side of the annular side, can drive the first support rod 51 and the second support rod 59 to move synchronously in opposite directions through the internal threaded hole 591 when rotating.

[0030] A worm wheel 56 is provided in the middle position of the annular side of the double-threaded screw rod 55, and the worm wheel 56 is connected to the double-threaded screw rod 55 by welding. The worm wheel 56 can drive the double-threaded screw rod 55 to rotate. A worm 58 is meshed on the upper side of the annular side of the worm wheel 56, and the worm 58 is connected to the anti-slip ring 581 and the hand turntable 54 by welding. The worm 58 can drive the worm wheel 56 to rotate, and the worm 58 and the worm wheel 56 have self-locking ability. A limiting ring 551 is provided on the right side of the annular side of the double-threaded screw rod 55, and the limiting ring 551 is connected to the double-threaded screw rod 55 by welding. Blocking covers 57 are symmetrically installed on the front and rear sides of the crawler 3. The blocking cover 57 and the limiting ring 551 prevent the double-threaded screw rod 55 from being displaced or shaking during rotation and use. In order to prevent the first support rod 51 and the second support rod 59 from slipping during the extension process, a hand turntable 54 is provided at the front end of the worm 58, and the hand turntable 54 is convenient for the inspector to rotate the worm 58 by hand, and an anti-slip ring 581 is provided on the front side of the annular side of the worm 58, and an anti-slip ring 53 is installed on the front end face of the crawler 3, and the anti-slip ring 581 and the anti-slip ring 53 prevent the worm 58 from displacement or shaking during rotation and use.

[0031] Embodiment 2:

[0032] On the basis of Example 1, in this embodiment, by reversing the adjusting nut 23, the adjusting nut 23 can drive the top guide wheel 22 to descend through the adjusting strut 25 and the supporting plate 21. Similarly, when the adjusting nut 23 is rotated forward, the adjusting strut 25 will drive the top guide wheel 22 to move upward through the supporting plate 21, so that the top guide wheel 22 can roll inside the test pipe 1 with a thick diameter, thereby facilitating the auxiliary guide assembly 2 to limit the crawler 3 inside the test pipes 1 with different thicknesses, avoiding the crawler 3 from moving up and down when moving inside the test pipe 1, and making the crawler 3 more stable in movement.

[0033] The auxiliary guide assembly 2 includes a supporting plate 21, a top guide wheel 22, an adjusting nut 23, a support cylinder 24 and an adjusting strut 25. A support cylinder 24 is provided at the middle position of the upper end surface of the crawler 3. The support cylinder 24 is connected to the crawler 3 and the guide block 242 by welding. The support cylinder 24 can not only limit the adjustment strut 25, but also support the adjustment nut 23. An adjusting strut 25 is installed inside the support cylinder 24. The adjustment strut 25 is connected to the supporting plate 21 by welding. The entire support rod 25 can support the supporting plate 21, and an adjusting nut 23 is installed on the annular side of the adjusting support rod 25. An external thread is provided on the annular side of the adjusting support rod 25, and the external thread is meshed with the adjusting nut 23. The meshed external thread and the adjusting nut 23 are convenient for the inspector to adjust the height of the adjusting support rod 25. The annular side of the adjusting nut 23 is provided with anti-slip textures, and the anti-slip textures make the annular side of the adjusting nut 23 more anti-slip, thereby preventing the adjusting nut 23 from slipping easily during the rotation process.

[0034] A supporting plate 21 is provided at the upper end of the adjustment strut 25, and the supporting plate 21 can support the top guide wheel 22. Top guide wheels 22 are symmetrically provided on the front and rear sides of the upper end of the supporting plate 21, and the top guide wheels 22 can limit and guide the upper end of the crawler 3 to prevent the crawler 3 from deviating up and down during the forward and backward displacement. A limiting groove 251 is provided on the left side of the annular side surface of the adjustment strut 25, and a guide block 242 is provided on the left side of the inner annular side surface of the support tube 24, and the guide block 242 is matched with the limiting groove 251. The guide block 242 is connected to the support tube 24 by welding. The matching guide block 242 and the limiting groove 251 prevent the adjustment strut 25 from rotating during the lifting and lowering process. A reinforcing plate 241 is provided on the lower side of the annular side surface of the support tube 24, and the reinforcing plate 241 makes the support stability of the support tube 24 better.

[0035] Working principle: before conducting weld inspection on the pipeline 1 to be tested, the inspector firstly rotates the worm 58 forward through the hand turntable 54, so that the worm 58 drives the worm wheels 56 on the front and rear sides to reverse together, and the reversed worm wheels 56 will drive the double-threaded screws 55 on the front and rear sides to reverse synchronously, and then the double-threaded screws 55 on the front and rear sides drive the two groups of first support rods 51 and second support rods 59 on the left and right sides to move synchronously outward through the internal threaded holes 591, at which time the spacing between the moving rollers 4 on the left and right sides will increase, so that the moving rollers 4 can roll inside the pipeline 1 to be tested with a thick diameter. Similarly, when the worm 58 is reversed, the two groups of first support rods 51 and second support rods 59 on the left and right sides move synchronously inward, at which time the spacing between the moving rollers 4 on the left and right sides will decrease, so that the moving rollers 4 can roll inside the pipeline 1 to be tested with a thin diameter, thereby facilitating the crawler 3 to move inside the pipelines 1 to be tested with different thicknesses with the help of the moving rollers 4; then The inspector then reverses the adjusting nut 23 by hand, and at this time the reversed adjusting nut 23 will drive the adjusting strut 25 to move downward through the external thread, and the adjusting strut 25 will drive the top guide wheel 22 to descend together through the supporting plate 21, so that the top guide wheel 22 can roll inside the pipe 1 to be tested with a thin diameter. Similarly, when the adjusting nut 23 is rotated forward, the adjusting strut 25 will drive the top guide wheel 22 to move upward through the supporting plate 21, so that the top guide wheel 22 can roll inside the pipe 1 to be tested with a thick diameter, thereby facilitating the auxiliary guide assembly 2 to be used inside the pipes 1 to be tested with different thicknesses to limit the crawler 3, and the matching guide block 242 and the limiting groove 251 prevent the adjusting strut 25 from rotating during the lifting process; when the spacing between the moving rollers 4 and the height of the top guide wheel 22 are adjusted to the required positions, the inspector can insert the crawler 3 into the pipe 1 to be tested (refer to Figure 1 or Figure 3 ), during this process, the external pulling rope is passed through the inside of the pipeline 1 to be tested and connected to the connecting ring 31 on the rear side in advance, so that the inspectors can use the external pulling rope and the connecting ring 31 to pull the crawling vehicle 3 to move it backwards, and at the same time, the connecting ring 31 on the front side is connected to the external return rope, and the crawling vehicle 3 moving backwards will drive the panoramic camera 6, the ultrasonic flaw detector 7 and the detection head 8 to move together to the depth of the pipeline 1 to be tested for pipeline weld detection. Since the detailed process and principle of pipeline weld detection are relatively mature technologies in the prior art, they will not be described in detail here. After the detection is completed, the inspectors only need to pull the crawling vehicle 3 through the external return rope and the connecting ring 31 to move it to the front side, and the crawling vehicle 3 can be moved forward from the inside of the pipeline 1 to be tested to the initial position so that the inspectors can remove it.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A crawler for pipeline weld detection, comprising a pipeline to be detected (1), a crawler (3), a moving roller (4), a panoramic camera (6), an ultrasonic flaw detector (7) and a detection head (8), characterized in that: A crawler (3) is inserted into the pipe to be tested (1), and movable rollers (4) are symmetrically installed on the left and right sides of the crawler (3). A panoramic camera (6) is installed on the right side of the front end face of the crawler (3), an ultrasonic flaw detector (7) is installed on the rear side of the upper end face of the crawler (3), and a detection head (8) is installed on the rear end face of the crawler (3); An auxiliary guide assembly (2) is provided on the upper end surface of the crawler (3), and the auxiliary guide assembly (2) is used to vertically limit the crawler (3). An adjustment assembly (5) is provided between the crawler (3) and the movable roller (4), and the adjustment assembly (5) is used to adjust the spacing between the movable rollers (4) and to support them.

2. A crawler for pipeline weld detection according to claim 1, characterized in that: The adjustment assembly (5) comprises a first support rod (51), a double-threaded screw (55), a worm wheel (56), a worm (58), a second support rod (59) and an internal threaded hole (591). The first support rod (51) is installed on the left side of the crawler (3), and the second support rod (59) is installed on the right side of the crawler (3). The first support rod (51) and the second support rod (59) are both provided with internal threaded holes (591). The double-threaded screw (55) is installed in the internal threaded hole (591). A worm wheel (56) is provided in the middle position of the annular side of the double-threaded screw (55), and the worm (58) is meshed on the upper side of the annular side of the worm wheel (56).

3. A crawler for pipeline weld detection according to claim 1, characterized in that: The auxiliary guide assembly (2) comprises a supporting plate (21), a top guide wheel (22), an adjusting nut (23), a supporting tube (24) and an adjusting strut (25); a supporting tube (24) is arranged in the middle of the upper end surface of the crawler (3); an adjusting strut (25) is installed inside the supporting tube (24); an adjusting nut (23) is installed on the annular side surface of the adjusting strut (25); a supporting plate (21) is arranged at the upper end of the adjusting strut (25); and top guide wheels (22) are symmetrically arranged on the front and rear sides of the upper end surface of the supporting plate (21).

4. A crawler for pipeline weld detection according to claim 2, characterized in that: A limit ring (551) is provided on the right side of the annular side of the double-threaded screw rod (55), and blocking covers (57) are symmetrically installed on the front and rear sides inside the crawler (3). The external thread on the left side of the annular side of the double-threaded screw rod (55) rotates in opposite directions to the external thread on the right side of the annular side.

5. The crawler for pipeline weld detection according to claim 2, characterized in that: The upper end surfaces of the first support rod (51) and the second support rod (59) are both provided with limit blocks (511); the left and right end surfaces of the crawler (3) are symmetrically provided with anti-slip frames (52); the front end of the worm (58) is provided with a hand turntable (54); the front side of the annular side surface of the worm (58) is provided with an anti-slip ring (581); and the front end surface of the crawler (3) is provided with an anti-slip ring (53).

6. The crawler for pipeline weld detection according to claim 3, characterized in that: A limiting groove (251) is provided on the left side of the annular side of the adjusting support rod (25), a guide block (242) is provided on the left side of the inner annular side of the supporting tube (24), and the guide block (242) matches the limiting groove (251), and a reinforcing sheet (241) is provided on the lower side of the annular side of the supporting tube (24).

7. The crawler for pipeline weld detection according to claim 1, characterized in that: A roller support shaft (41) is installed inside the movable roller (4), and the roller support shaft (41) is a rotatable structure. The front and rear end surfaces of the crawler (3) are both provided with connecting rings (31).

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