A steel oil pipeline crack detection device and a method of using the same

Abstract

The application discloses a kind of steel petroleum pipeline crack detection device and its using method, including sleeve ring, oil pipe crack detection device is arranged in the sleeve ring, the sleeve ring is divided into upper sleeve ring and lower sleeve ring, characterized in that;First mobile wheel group is connected on the lower sleeve ring, two second mobile wheel groups are symmetrically arranged on the upper sleeve ring;First mobile wheel group, second mobile wheel group are provided with connecting block, telescopic component, mobile wheel;Telescopic component one end is connected with connecting block, and the other end is connected with mobile wheel.The application can continuously detect pipeline, in this detection process, when encountering pipeline elbow, crack detection device does not need to be disassembled and installed again, simple operation, and more thorough and stable detection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of crack detection, in particular to a steel oil pipeline crack detection device and a use method thereof. BACKGROUND

[0002] Oil is a non-renewable energy source, and the continuous progress of science and technology cannot be achieved without the help of oil resources. Because of oil, a motor can run, and because of oil, sea, land and air can freely shuttle. From the spaceship soaring in space to the submarine diving into the sea, all of them cannot be separated from important oil resources. In the process of oil exploitation, oil often needs to be transported to a designated location. Since oil is in liquid form, there is a very high requirement for the sealing of the conveying pipeline. With the passage of time, the pipeline is inevitably damaged after long-term exposure to the outside, and the oil pipeline needs to be cracked.

[0003] Publication No. CN110514356A discloses an oil pipeline crack detection device, which comprises a body, a sliding cavity is arranged in the body, left and right arc-shaped holes are arranged in the body and communicate with the sliding cavity, an upper hole is arranged above the sliding cavity, a sliding body is slidably connected in the sliding cavity, an upper sliding rod is fixedly connected to the upper end of the sliding body and slidably connected with the upper hole, an output cavity is arranged in the sliding body. This prior art can be automatically fixedly connected to the pipeline and can move freely. In the moving process, the pipeline is detected by a probe that can move around the pipeline in a circumferential direction. Through the all-around probe detection, the damaged part can be well found, so that the cracks can be repaired, thereby preventing the loss caused by oil leakage. The present application also sets different pipe diameters that can be freely changed, so that pipelines with different diameters can be detected.

[0004] This prior art can detect oil pipelines with different diameters, but cannot cross the elbow connection of the oil pipeline. When the oil pipeline is pre-buried, the direction will change and the elbow will be set.

[0005] The oil and gas leakage point rapid detection equipment disclosed by Publication No. CN217519683U relates to the field of oil and gas detection and comprises a connecting unit located on the outer side of an oil and gas pipeline and a gas-liquid detection device movably mounted on the surface of the connecting unit. The left and right ends of the connecting unit are connected with limiting units for fixing the oil and gas pipeline. The limiting unit comprises an inclined extension piece abutting against the outer wall of the oil pipeline. The end of the inclined extension piece is fixedly connected with a rubber pad layer, and the end of the inclined extension piece is fixedly connected with a clamping arm. The prior art has the functions of abutting installation and improved anti-skid performance, can reduce the time for installing and dismounting the oil and gas leakage point rapid detection equipment with the pipeline, improve the portability during installation and dismounting, facilitate replacement, and adjust the length of the oil and gas leakage point rapid detection equipment to be suitable for pipeline interfaces of different lengths.

[0006] The prior art can detect oil pipelines of different diameters, but cannot cross the elbow connection of the oil pipeline. When the oil pipeline is pre-buried, the direction may change, and an elbow is arranged.

[0007] Publication No. CN114228853A discloses a crawler for oil pipeline detection, which comprises a rack, a front crawling foot movably connected to one side of the rack, a rear crawling foot movably connected to the other side of the rack, a clamping telescopic device fixedly arranged in the middle of the rack, and a detection device fixedly arranged on the clamping telescopic device. The clamping telescopic device can drive the rack to move on the oil pipeline in a telescopic manner, and the front and rear crawling feet can realize crawling on the oil pipeline. The detection device can detect the oil pipeline. The prior art uses a mechanical arm to crawl and uses a wheel mechanism to fix, and a driving cylinder is used to drive the crawling. The detection device is placed on the rack, and the movement process is completed by the mechanical arm and the driving cylinder. The mechanical arm can actively overcome obstacles during crawling, and the reliability is high.

[0008] The prior art can detect oil pipelines of different diameters and can cross the elbow connection of the oil pipeline, but the crawling arm has too low advancing efficiency and low practical application value.

[0009] In summary, the technical solutions, the technical problems to be solved, and the beneficial effects of the above disclosed technologies are different from those of the present application. The above disclosed technology documents do not have technical inspiration for more technical features, technical problems to be solved, and beneficial effects of the present application. SUMMARY

[0010] In view of the above-mentioned defects of the prior art, the purpose of the present application is to solve the problems that the detection device cannot cross the elbow connection of the oil pipeline and the advancing speed is slow, and to improve the detection accuracy.

[0011] In order to achieve the above object, the present application adopts the following technical solutions:

[0012] A steel oil pipeline crack detection device, comprising a sleeve, an oil pipeline crack detection device is arranged in the sleeve, the sleeve is divided into an upper sleeve and a lower sleeve, characterized in that: a first moving wheel set is connected to the lower sleeve, and two second moving wheel sets are symmetrically arranged on the upper sleeve.

[0013] The first moving wheel set and the second moving wheel set are both provided with a connecting block, an extension assembly and a moving wheel; one end of the extension assembly is connected to the connecting block, and the other end is connected to the moving wheel.

[0014] The extension assembly comprises a second connecting rod connected to the connecting block and a first connecting rod connected to the second connecting rod.

[0015] The second connecting rod is a hollow rod, and the other end of the first connecting rod is connected to the moving wheel.

[0016] The first connecting rod can move forward and backward in the second connecting rod, and the distance between the first connecting rod and the second connecting rod is adjusted by a locking piece arranged on the second connecting rod.

[0017] The first moving wheel set further comprises a round rod, and the round rod is provided with a first connecting block.

[0018] The second moving wheel set further comprises a rotating rod, and the rotating rod is provided with a second connecting block.

[0019] The second connecting block in the second moving wheel set is connected to multiple, at least two moving wheels through the extension assembly.

[0020] The second moving wheel set is provided with a swinging device at the upper end and a following swinging mechanism at the lower end, and the plane where the end surface of the sleeve is located is a first plane.

[0021] The swinging device comprises an arc-shaped rack fixedly connected to the sleeve, and a first gear is engaged on the arc-shaped rack.

[0022] The first gear is connected to the rotating rod, the rotating rod is provided with a circular groove on the side close to the first gear, and a second protruding block is arranged in the circular groove.

[0023] The second protruding block is provided with a rotating shaft, the axis of the rotating shaft is perpendicular to the first plane, the rotating shaft is connected to a horizontal plate, and the horizontal plate is fixedly connected to the sleeve.

[0024] The following swinging mechanism comprises a third connecting rod movably connected to the rotating rod, the third connecting rod is movably connected to a sixth connecting rod, and the other end of the sixth connecting rod is movably connected to a seventh connecting rod.

[0025] The seventh connecting rod axis is perpendicular to the first plane, and the seventh connecting rod is movably connected with the vertical plate arranged on the sleeve ring through the limiting rod;

[0026] The vertical plate is provided with a sliding groove for the limiting rod to slide.

[0027] The horizontal plate is provided with a double-shaft linear motor, and the output shaft of the double-shaft linear motor is connected with the fifth connecting rod;

[0028] The fifth connecting rod can move forward and backward on the output shaft of the double-shaft linear motor, and the other end of the fifth connecting rod is movably connected with the fourth connecting rod;

[0029] The fourth connecting rod is movably connected with a first protrusion arranged on the rotating rod.

[0030] The first connecting block in the first moving wheel set is connected with a plurality of, at least two moving wheels through the telescopic assembly.

[0031] A transmission rack running upward and downward is arranged between the seventh connecting rod and the limiting rod, and the transmission rack is movably connected with the vertical plate arranged on the sleeve ring through the limiting rod;

[0032] Second gears meshing with the transmission rack are arranged at both ends of the round rod, and the second gears further limit the transmission rack on the vertical plate.

[0033] The oil pipe crack detection device comprises a plurality of ultrasonic detection devices, the plurality of ultrasonic detection devices are evenly staggered arranged on the annular plate, the annular plate is arranged in the sliding groove of the sleeve ring, and the annular plate is arranged as two parts.

[0034] A gear ring is arranged at an outer end of the annular plate, a motor frame is arranged on one side of the gear ring of the sleeve ring, a motor is installed in the motor frame, and a third gear meshing with the gear ring is installed on the output shaft of the motor.

[0035] The moving wheel is a ball wheel; the oil pipe crack detection device forms a circle with a diameter greater than the diameter of the oil pipe elbow; and the upper sleeve ring and the lower sleeve ring are connected through bolts.

[0036] In order to achieve the above purpose, the technical scheme is as follows:

[0037] A steel oil pipe crack detection device and a use method thereof,

[0038] S1: installation and debugging: first, disassemble the sleeve ring and the annular plate into upper and lower sleeve rings and upper and lower annular plates, install the sleeve ring and the annular plate together on the oil pipe, then install the moving wheel set, and after installation, adjust the distance between the first connecting rod and the second connecting rod to make the three moving wheels around the oil pipe tightly adhere to the surface of the oil pipe;

[0039] S2: crack detection: start the motor to drive the third gear to rotate, and make the ultrasonic detection device on the ring plate rotate to detect the cracks on the outside of the oil pipeline, and push the device until it hits the oil pipeline elbow;

[0040] S3: cross the elbow connection: by starting the dual-shaft linear motor, the circle formed by the three moving wheels is enlarged, and the moving wheel group is flipped to make part of the moving wheels cross the elbow connection. If it cannot be crossed, the distance between the first connecting rod and the second connecting rod can be adjusted to further enlarge the diameter of the circle formed by the three moving wheels. After crossing, the dual-shaft linear motor is started in reverse to reset;

[0041] S4: recycling and saving step: after detection, disconnect the third connecting rod from the rotating rod, remove the bolts, separate the collar and the ring plate, and remove them from the oil pipeline. After removal, to avoid damage to the ultrasonic detection device, the collar and the ring plate should be fixed together and placed.

[0042] 1) The technical problem of crossing the oil pipeline elbow can be solved;

[0043] 2) The detection device is optimized, making the detection more reliable and accurate;

[0044] 3) The device moves fast and has high efficiency;

[0045] 4) The pipeline can be continuously detected without the need to disassemble and reassemble the crack detection device, which is simple to operate and more thorough and stable in detection. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 is a schematic view of the overall structure of the steel oil pipeline crack detection device of the present application;

[0047] Figure 2 is a structural schematic view of another perspective of the present application;

[0048] Figure 3 is a structural schematic view of the present application with the collar hidden;

[0049] Figure 4 is a structural schematic view of the three moving wheel groups of the present application;

[0050] Figure 5 is an enlarged view of part A of the present application; Figure 4

[0051] Figure 6 is a structural schematic view of the two second moving wheel groups of the present application;

[0052] Figure 7 is a structural schematic view of the swinging device of the present application;

[0053] ​Figure 8 Figure is a partial structure diagram of the swing device of the present application;

[0054] Figure 9 Figure is a structure diagram of the following swing mechanism of the present application;

[0055] In the figure: 1, collar; 2, rotating rod; 201, first connecting rod; 202, second connecting rod; 203, second connecting block; 2031, first connecting block; 204, locking piece; 205, moving wheel; 206, round rod; 3, arc-shaped rack; 301, first gear; 302, first protrusion; 303, second protrusion; 304, rotating shaft; 305, circular groove; 306, third connecting rod; 4, circular ring; 401, fourth connecting rod; 402, fifth connecting rod; 5, sixth connecting rod; 501, seventh connecting rod; 502, transmission rack; 503, second gear; 6, cross rod; 601, third gear; 602, gear ring; 603, annular plate; 604, ultrasonic detection device; 7, vertical plate; 8, bolt; 9, motor; 10, cross plate; 11, limiting rod; 12, double-shaft linear motor. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. Embodiment 1

[0057] Please refer to Figure 1 , Figure 7 and Figure 9 , a steel oil pipeline crack detection device and a use method thereof, comprising a collar 1, an oil pipeline crack detection device is arranged in the collar 1, three moving wheel groups are arranged at one end of the collar 1, the three moving wheel groups are respectively a first moving wheel group and two second moving wheel groups.

[0058] The oil pipeline crack detection device forms a circle with a diameter greater than the diameter of the oil pipeline elbow;

[0059] The collar 1 is divided into two parts, and the upper and lower collars are connected by bolts 8; the first moving wheel group is connected with the lower collar, and the two second wheel groups are symmetrically arranged on the upper collar;

[0060] The three moving wheel groups each comprise a connecting block, the connecting blocks in the three moving wheel groups are each connected with a moving wheel 205 through an extension assembly, and the moving wheel 205 is a ball wheel;

[0061] The telescopic assembly comprises a second connecting rod 202 connected with the connecting block and a first connecting rod 201 connected with the second connecting rod 202, the second connecting rod 202 is a hollow rod, the first connecting rod 201 is connected with a moving wheel 205 at the other end, the first connecting rod 201 can move forward and backward in the second connecting rod 202, the distance between the first connecting rod 201 and the second connecting rod 202 is adjusted by the locking piece 204 arranged on the second connecting rod 202, the first connecting block 2031 of the first moving wheel group is connected with a round rod 206, and the second connecting block 203 of the second moving wheel group is connected with a rotating rod 2;

[0062] Method for use:

[0063] First, rotate the bolt 8 to disassemble the sleeve ring 1 into two parts, then sleeve the two sleeve rings 1 on the outside of the oil pipeline for crack detection, after the two sleeve rings 1 are sleeved and fixed, install the moving wheel group, after installation, adjust the distance between the first connecting rod 201 and the second connecting rod 202, so that the three moving wheels 205 around the outside of the oil pipeline are tightly attached to the surface of the oil pipeline, at this time, the sleeve ring 1 is pushed along the outer wall of the oil pipeline to detect the cracks of the pipeline, this structure is beneficial to adapt to oil pipelines with different pipe diameters, so that the detection device can stably operate on the outside of the oil pipeline.

[0064] When crossing the connecting part of the oil pipeline elbow, adjust the distance between the first connecting rod 201 and the second connecting rod 202, so that the circle formed between the three moving wheels 205 becomes larger, so that the device can pass through the oil pipeline elbow. Example 2

[0065] Please refer to Figures 1 to 9 On the basis of example 1, the second connecting block 203 in the second moving wheel group is connected with multiple, at least two moving wheels 205 through the telescopic assembly;

[0066] The upper end of the second moving wheel group is provided with a swing device, and the lower end is provided with a following swing mechanism;

[0067] For the convenience of description, the plane where the end face of the sleeve ring 1 is located is defined as the first plane;

[0068] For the convenience of description, the plane where the end face of the sleeve ring 1 is located is defined as the first plane; Figure 7, the swing device includes the arc-shaped rack 3 which is fixedly connected with the collar 1, the first gear 301 is engaged on the arc-shaped rack 3, the first gear 301 is connected with the rotating rod 2, the rotating rod 2 is provided with the circular groove 305 on the side close to the first gear 301, the second protrusion 303 is arranged in the circular groove 305, the rotating shaft 304 is arranged on the second protrusion 303, the axis of the rotating shaft 304 is perpendicular to the first plane, the rotating shaft 304 is connected with the horizontal plate 10, the horizontal plate 10 is fixedly connected with the collar 1, when the first gear 301 rotates in the arc-shaped rack 3, the rotating rod 2 is swung with the rotating shaft 304 as the center, so that the rotation axis of the second movable wheel set changes, at the same time, the rotating rod 2 rotates, and then the second connecting block 203 rotates;

[0069] Specifically refer to Figure 3 、 Figure 9 , the following swing mechanism includes the third connecting rod 306 which is movably connected with the rotating rod 2, the third connecting rod 306 is movably connected with the sixth connecting rod 5, the sixth connecting rod 5 is movably connected with the seventh connecting rod 501 at the other end, the axis of the seventh connecting rod 501 is perpendicular to the first plane, the seventh connecting rod 501 is movably connected with the vertical plate 7 arranged on the collar 1 through the limiting rod 11, the vertical plate 7 is provided with the sliding groove for the sliding of the limiting rod 11; when the rotating rod 2 swings, the third connecting rod 306 drives the sixth connecting rod 5, so that the seventh connecting rod 501 moves downward through the limiting rod 11 and the vertical plate 7;

[0070] Specifically refer to Figure 4 、 Figure 6 and Figure 7 , the horizontal plate 10 is provided with the double-shaft linear motor 12, the output shaft of the double-shaft linear motor 12 is connected with the transmission rack 502, the transmission rack 502 can move forward and backward on the output shaft of the double-shaft linear motor 12, the transmission rack 502 is movably connected with the fourth connecting rod 401 at the other end, the fourth connecting rod 401 is movably connected with the first protrusion 302, and the first protrusion 302 is arranged on the rotating rod 2;

[0071] Usage:

[0072] When the oil pipeline elbow connection is encountered, the device is close to the oil pipeline elbow connection, the double-shaft linear motor 12 is started to drive the fifth connecting rod 402 to move linearly, the fifth connecting rod 402 drives the fourth connecting rod 401 to push the annular ring 4 to swing around the rotating shaft 304 as the axis, the annular ring 4 drives the rotating rod 2 to swing, the rotating rod 2 drives the first gear 301 to rotate in the arc-shaped rack 3, the rotating rod 2 drives the second movable wheel set to rotate;

[0073] In one aspect, the axes of the two second mobile wheel groups are away from the oil pipeline, but under the action of gravity, the result is that the mobile wheels 205 of the first mobile wheel group are away from the oil pipeline;

[0074] In another aspect, the two second mobile wheel groups start to turn over, so that one mobile wheel 205 in each of the two second mobile wheel groups crosses the elbow joint of the oil pipeline;

[0075] Then the pushing device makes the first mobile wheel group also cross the elbow joint of the oil pipeline;

[0076] Finally, the double-shaft linear motor 12 is started in reverse to restore the device. Example 3

[0077] Please refer to Figure 9 On the basis of example 2, the first connecting block 2031 in the first mobile wheel group is connected to multiple, at least two, mobile wheels 205 through a telescopic assembly;

[0078] A transmission rack 502 running up and down is arranged between the seventh connecting rod 501 and the limiting rod 11, the transmission rack 502 is movably connected to the vertical plate 7 arranged on the sleeve ring 1 through the limiting rod 11, the second gear 503 meshing with the transmission rack 502 is arranged at both ends of the round rod 206, and the second gear 503 further limits the transmission rack 502 on the vertical plate 7; when the rotating rod 2 swings, the third connecting rod 306 drives the sixth connecting rod 5, so that the seventh connecting rod 501 and the transmission rack 502 move downward through the limiting rod 11 and the vertical plate 7, drive the second gear 503 to rotate, and make the round rod 206 rotate;

[0079] Usage:

[0080] When encountering the elbow of the oil pipeline, the device is close to the oil pipe elbow, the double-shaft linear motor 12 is started, one mobile wheel 205 in each of the two second mobile wheel groups crosses the oil pipe elbow, and one mobile wheel 205 in the first mobile wheel group also crosses the elbow joint of the oil pipeline,

[0081] Then the pushing device makes the device completely cross the elbow joint of the oil pipeline;

[0082] Finally, the double-shaft linear motor 12 is started in reverse to restore the device. Example 4

[0083] Please refer to Figure 2The oil pipe crack detection device comprises a plurality of ultrasonic detection devices 604 which are uniformly staggered on the annular plate 603, the uniform staggering can improve the detection length, the pipe is detected multiple times, and the detection accuracy is improved, the annular plate 603 is arranged in the sleeve ring 1 sliding groove, a gear ring 602 is arranged at an outer end of the annular plate 603, a motor frame is arranged on one side of the gear ring 602, a motor 9 is installed in the motor frame, an annular plate 603 meshing with the gear ring 602 is installed on an output shaft of the motor 9, and the annular plate 603 is arranged in two parts.

[0084] Method for use:

[0085] When detecting, the motor 9 can be started to drive the third gear 601 to rotate, the third gear 601 drives the gear ring 602 to rotate, the gear ring 602 drives the ultrasonic detection devices 604 which are annularly and staggeredly arranged on the outer side of the annular plate 603 to rotate, and the external cracks of the oil pipeline are detected, the structure is beneficial to uniformly and stably detecting the external cracks of pipelines with different pipe diameters, and missing detection during pipeline crack detection is avoided.

[0086] After the pipeline crack detection is completed, the third connecting rod 306 is disconnected from the rotating rod 2, the bolt 8 is disassembled, the sleeve ring 1 and the annular plate 603 are separated upwards and downwards, and are taken off from the oil pipeline, and after being taken off, the two sleeve rings 1 are fixed together for placement to avoid damage to the ultrasonic detection devices 604.

[0087] Method for use of the present application in combination with all embodiments:

[0088] S1: installation and debugging: the sleeve ring 1 and the annular plate 603 are disassembled into upper and lower sleeve rings and upper and lower annular plates, the sleeve ring 1 and the annular plate 603 are installed on the oil pipeline together, then the moving wheel set is installed, and after installation, the distance between the first connecting rod 201 and the second connecting rod 202 is adjusted, so that the three moving wheels 205 around the outer side of the oil pipe are tightly attached to the surface of the oil pipe;

[0089] S2: crack detection: the motor 9 is started to drive the third gear 601 to rotate, the ultrasonic detection devices 604 on the annular plate 603 are rotated, and the external cracks of the oil pipeline are detected, and the pushing device is pushed until the oil pipeline elbow is contacted;

[0090] S3: passing through the elbow connection: the double-shaft linear motor 12 is started to make the circle formed between the three moving wheels 205 larger, and the moving wheel set is turned over to make part of the moving wheels 205 pass through the elbow connection, if the moving wheels 205 cannot pass through, the distance between the first connecting rod 201 and the second connecting rod 202 can be adjusted to further expand the diameter of the circle formed between the three moving wheels 205, and after passing through, the double-shaft linear motor 12 is started in reverse to reset.

[0091] S4: recovery, storage: after detection, remove the connection between the third connecting rod 306 and the rotating rod 2, remove the bolt 8, separate the sleeve ring 1 and the annular plate 603, and take them off from the oil pipeline. After taking off, in order to avoid damage to the ultrasonic detection device 604, the sleeve ring 1 and the annular plate 603 are fixed together and placed.

[0092] In the present application, the parts not discussed in detail, the connection mode of each part in the present application all belong to the known technology in the technical field. Direct application can be used, and will not be described again.

[0093] In the present application, the term "a plurality of" refers to two or more, unless otherwise explicitly limited. The terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, "connecting" can be fixed connection, or detachable connection, or integral connection; "connecting" can be direct connection, or indirect connection through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0094] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or unit referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.

[0095] In the description of the present application, the terms "one embodiment", "some embodiments", "a specific embodiment" and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0096] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A steel oil pipeline crack detection device, comprising a collar, wherein the oil pipeline crack detection device is disposed inside the collar, the collar being divided into an upper collar and a lower collar, characterized in that; The first moving wheel group is connected to the lower sleeve ring, and two second moving wheel groups are symmetrically arranged on the upper sleeve ring; The first moving wheel group and the second moving wheel group are each provided with a connecting block, an extension assembly and a moving wheel; one end of the extension assembly is connected to the connecting block, and the other end is connected to the moving wheel; The first moving wheel group further comprises a round rod, and the round rod is provided with a first connecting block; The second moving wheel group further comprises a rotating rod, and the rotating rod is provided with a second connecting block; The upper end of the second moving wheel group is provided with a swing device, and the lower end is provided with a following swing mechanism; the plane in which the sleeve ring end surface is located is a first plane; The swing device comprises an arc-shaped rack fixedly connected to the sleeve ring, and a first gear meshing with the arc-shaped rack; the first gear is connected to the rotating rod, and the rotating rod is provided with a circular groove on the side close to the first gear; a second protrusion is arranged in the circular groove; a rotating shaft is arranged on the second protrusion, and the axis of the rotating shaft is perpendicular to the first plane; the rotating shaft is connected to a horizontal plate, and the horizontal plate is fixedly connected to the sleeve ring; The following swing mechanism comprises a third connecting rod movably connected to the rotating rod, the third connecting rod is movably connected to a sixth connecting rod, and the other end of the sixth connecting rod is movably connected to a seventh connecting rod; the axis of the seventh connecting rod is perpendicular to the first plane, and the seventh connecting rod is movably connected to a vertical plate arranged on the sleeve ring through a limiting rod; a sliding groove is formed in the vertical plate for the limiting rod to slide; A double-shaft linear motor is arranged on the horizontal plate, and the output shaft of the double-shaft linear motor is connected to a fifth connecting rod; the fifth connecting rod moves forward and backward on the output shaft of the double-shaft linear motor, and the other end of the fifth connecting rod is movably connected to a fourth connecting rod; the fourth connecting rod is movably connected to a first protrusion, and the first protrusion is arranged on the rotating rod; A transmission gear strip running upward and downward is arranged between the seventh connecting rod and the limiting rod, and the transmission gear strip is movably connected to the vertical plate arranged on the sleeve ring through the limiting rod; Second gears meshing with the transmission gear strip are arranged at both ends of the round rod, and the second gears further limit the transmission gear strip on the vertical plate.

2. The apparatus for detecting a crack in a steel oil pipeline according to claim 1, wherein The extension assembly comprises a second connecting rod connected to the connecting block and a first connecting rod connected to the second connecting rod; The second connecting rod is a hollow rod, and the other end of the first connecting rod is connected to the moving wheel; The first connecting rod moves forward and backward in the second connecting rod, and the distance between the first connecting rod and the second connecting rod is adjusted by a locking piece arranged on the second connecting rod.

3. The apparatus for detecting a crack in a steel oil pipeline according to claim 1, wherein The second connecting block in the second moving wheel group is connected to at least two moving wheels through the extension assembly.

4. The apparatus for detecting a crack in a steel oil pipeline according to claim 1, wherein The first connecting block in the first moving wheel group is connected to at least two moving wheels through the extension assembly.

5. The apparatus for detecting a crack in a steel oil pipeline according to claim 1, wherein The oil pipe crack detection device comprises a plurality of ultrasonic detection devices, the plurality of ultrasonic detection devices are evenly staggered on an annular plate, the annular plate is arranged in a sliding groove of a sleeve ring, and the annular plate is arranged in two parts from top to bottom.

6. The apparatus for detecting a crack in a steel oil pipeline according to claim 5, wherein A gear ring is arranged at an outer end of the annular plate, a motor frame is arranged on one side of the gear ring, a motor is arranged in the motor frame, and a third gear meshing with the gear ring is arranged on the output shaft of the motor.

7. The apparatus for detecting a crack in a steel oil pipeline according to claim 6, wherein The moving wheel is a ball wheel, the diameter of the circle formed by the oil pipe crack detection device is greater than the diameter of the oil pipe elbow, and the upper sleeve ring and the lower sleeve ring are connected by bolts.

8. A method of using the apparatus for detecting cracks in steel oil pipelines as claimed in claim 7, characterized in that, It comprises: Step S1: installation, debugging step; Step S2: detecting crack step; Step S3: step of crossing elbow joint; Step S4: recycling, saving step; The step is specifically: S1: installation, debugging: first, the ring, ring plate is dismantled into upper and lower ring, upper and lower ring plate, the ring, ring plate is installed together to the oil pipeline, then the moving wheel group is installed, after installation, the distance between the first connecting rod and the second connecting rod is adjusted, so that the three moving wheels around the oil pipe are tightly attached to the oil pipe surface; S2: detecting crack: starting the motor to drive the third gear to rotate, so that the ultrasonic detection device on the ring plate rotates to detect the crack on the outside of the oil pipeline, and the pushing device is pushed until it hits the elbow of the oil pipeline; S3: crossing the elbow joint: by starting the double-shaft linear motor, the circle formed by the three moving wheels is enlarged, and the moving wheel group is turned over to make part of the moving wheels cross the elbow joint, if it cannot be crossed, the distance between the first connecting rod and the second connecting rod can be further adjusted to enlarge the diameter of the circle formed by the three moving wheels, and after crossing, the double-shaft linear motor is started in reverse to reset; S4: recycling, saving step: after detection, the connection between the third connecting rod and the rotating rod is released, the bolts are disassembled, the ring and the ring plate are separated, and the ring and the ring plate are taken off from the oil pipeline, after taking off, in order to avoid damage to the ultrasonic detection device, the ring and the ring plate should be fixed together and placed.

Images