Radiographic inspection device for welding seam of natural gas pipeline

Abstract

The utility model discloses a natural gas pipeline welding seam radiographic inspection device, which relates to the technical field of pipeline inspection and comprises a supporting mechanism, a ray machine arranged on the supporting mechanism, a driving mechanism arranged on the lower side of the supporting mechanism, and moving mechanisms symmetrically arranged on the front side and the rear side of the supporting mechanism. The moving mechanism makes contact with the steel pipeline inner wall supporting device to move and limits the device after reaching a preset position. The device has the beneficial effects that the supporting mechanism can bear a radioactive source, the moving mechanism can drive the device to advance into the pipeline, the supporting wheels make contact with the inner wall of the steel pipeline in the advancing process of the flaw detection device through the moving mechanism, the flaw detection device can move, and after the flaw detection device reaches the detection position, the fixed supporting legs stretch; non-slip mats on the surfaces of the fixed supporting legs are in contact with the interior of the steel pipeline to fix the position of the flaw detection device.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline detection, in particular to a ray flaw detection device for natural gas pipeline welds. Background Technique

[0002] The pipeline crawler for ray flaw detection is a device that installs an X-ray flaw detector on a small vehicle with driving and crawling, and drives and positions it inside the pipeline to be inspected through wireless control. It is convenient to use, has accurate detection effect, and is widely used in the flaw detection operation of natural gas pipeline welds.

[0003] For example, the patent document with the publication number CN218094932U discloses a ray flaw detection device for natural gas pipeline welds, including a front crawler frame. One side of the front crawler frame is provided with a mounting plate, and an X-ray machine is placed inside the mounting plate. One side surface of the mounting plate is provided with a rear crawler frame. Moving wheels are arranged on both sides of the front crawler frame and the rear crawler frame, and the moving wheels are electrically connected to the storage battery inside the battery box. Spacing adjustment components are arranged on the top surfaces of the front crawler frame and the rear crawler frame. A fixed installation component is arranged on the outer surface of the X-ray machine. An auxiliary support component is arranged above the battery box and the rear crawler frame. In the prior art, there is a lack of position fixing measures after the flaw detection device enters the pipeline and reaches the predetermined position, and the device is prone to move during the ray flaw detection process, affecting the result of ray flaw detection. Content of the Utility Model

[0004] The purpose of the utility model is to provide a ray flaw detection device for natural gas pipeline welds to solve the above problems.

[0005] The utility model realizes the above purpose through the following technical solutions:

[0006] A ray flaw detection device for natural gas pipeline welds includes a support mechanism, an X-ray machine is arranged on the support mechanism, a driving mechanism is arranged on the lower side of the support mechanism, and moving mechanisms are symmetrically arranged on the front and rear sides of the support mechanism. The moving mechanisms are used to contact the inner wall of the steel pipeline, support the movement of the device, and limit the device after reaching the predetermined position. The moving mechanism includes symmetrically arranged fixed brackets fixedly connected to the support mechanism. A second motor is fixedly connected to the fixed brackets. The output end of the second motor is fixedly connected with a first bevel gear, and the first bevel gear is rotatably connected to the fixed brackets. A plurality of second bevel gears are evenly arranged in a circle and meshed with one side of the first bevel gear, and the second bevel gears are rotatably connected to the fixed brackets. One end of the second bevel gear is fixedly connected with a screw rod, and a fixed leg is threadedly connected to the screw rod. The upper end of the fixed leg is slidably connected with a telescopic head, a spring is fixedly connected between the telescopic head and the fixed leg, and a support wheel is rotatably connected to the end of the telescopic head far away from the spring.

[0007] Preferably, the support mechanism includes a bearing box, a groove is provided on the bearing box, a ray machine is provided in the groove, symmetrically arranged support plates are fixedly connected to the front and rear sides of the bearing box, the support plates are fixedly connected to the fixed brackets, and a fixed baffle is bolted to the upper end of the bearing box.

[0008] Preferably, the driving mechanism includes two meshing transmission gears, the transmission gears are rotatably connected to the bearing box, a first motor is fixedly connected to the bearing box, the output end of the first motor is fixedly connected to one of the transmission gears, a belt pulley is fixedly connected to the lower side of the transmission gear, a rotating arm is rotatably connected to the belt pulley, the other end of the rotating arm is rotatably connected to a driving wheel, the driving wheel and the belt pulley are connected and driven by a belt, a connecting rod is rotatably connected to one side of the rotating arm, and a telescopic rod is fixedly connected to the lower side of the bearing box, and the connecting rod is rotatably connected to the output end of the telescopic rod.

[0009] Preferably, a flexible anti-slip pad is provided at one end of the fixed leg close to the inner wall of the steel pipe.

[0010] Preferably, the surface of the driving wheel is provided with patterns for increasing friction.

[0011] Preferably, a position sensor is provided on the bearing box.

[0012] The beneficial effects are as follows: The support mechanism can carry the radiation source, the moving mechanism can drive the device to move forward into the pipeline. With the moving mechanism, during the forward movement of the flaw detection device, the support wheels contact the inner wall of the steel pipe, enabling the flaw detection device to move. After reaching the detection position, the fixed legs extend, and the anti-slip pads on the surface of the fixed legs contact the inside of the steel pipe to fix the position of the flaw detection device.

[0013] The additional technical features and their advantages of the present invention will be more clearly described in the following description content, or can be understood through the specific practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification, and are used together with the following specific embodiments to explain the present invention, but do not constitute a limitation to the present invention. In the drawings:

[0015] Figure 1 is a perspective view of a natural gas pipeline weld ray flaw detection device of the present invention;

[0016] Figure 2 is a front view of the fixed state of a natural gas pipeline weld ray flaw detection device of the present invention;

[0017] Figure 3 is a structural schematic diagram of the support device of a natural gas pipeline weld ray flaw detection device of the present invention;

[0018] Figure 4 It is a left cross-sectional view of the moving mechanism of a ray flaw detection device for a natural gas pipeline weld of the present utility model;

[0019] Figure 5 It is a schematic structural diagram of the driving mechanism of a ray flaw detection device for a natural gas pipeline weld of the present utility model.

[0020] The description of the reference numerals is as follows:

[0021] 1. Ray machine; 201. Bearing box; 202. Support plate; 203. Fixed baffle; 301. First motor; 302. Driving gear; 303. Belt pulley; 304. Belt; 305. Rotating arm; 306. Driving wheel; 307. Connecting rod; 308. Telescopic rod; 401. Fixed bracket; 402. Second motor; 403. First bevel gear; 404. Second bevel gear; 405. Screw rod; 406. Fixed leg; 407. Spring; 408. Telescopic head; 409. Support wheel. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0023] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0024] The present utility model will be further described below in conjunction with the accompanying drawings:

[0025] Such as Figures 1-5As shown in the figure, a ray flaw detection device for natural gas pipeline welds includes a support mechanism. A ray machine 1 is arranged on the support mechanism. A driving mechanism is arranged on the lower side of the support mechanism. Moving mechanisms are symmetrically arranged on the front and back sides of the support mechanism. The moving mechanisms are used to contact the inner wall of the steel pipeline, support the movement of the device, and limit the device after reaching the predetermined position. The moving mechanism includes fixed brackets 401 symmetrically arranged and fixedly connected to the support mechanism. A second motor 402 is fixedly connected to the fixed bracket 401. The output end of the second motor 402 is fixedly connected with a first bevel gear 403. The first bevel gear 403 is rotatably connected to the fixed bracket 401. A number of second bevel gears 404 evenly arranged in a circle are engaged on one side of the first bevel gear 403. The second bevel gear 404 is rotatably connected to the fixed bracket 401. One end of the second bevel gear 404 is fixedly connected with a screw rod 405. A fixed leg 406 is threadedly connected to the screw rod 405. The upper end of the fixed leg 406 is slidably connected with a telescopic head 408. A spring 407 is fixedly connected between the telescopic head 408 and the fixed leg 406. A support wheel 409 is rotatably connected to the end of the telescopic head 408 away from the spring 407. A flexible anti-slip pad is arranged at one end of the fixed leg 406 close to the inner wall of the steel pipeline. The staff puts the flaw detection device into the pipeline interior. The second motor 402 rotates to drive the first bevel gear 403 to rotate. The first bevel gear 403 rotates to drive the second bevel gear 404 to rotate. The second bevel gear 404 rotates to drive the screw rod 405 to rotate. The screw rod 405 rotates to drive the fixed leg 406 and other components thereon to move along the axial direction of the screw rod 405, so that the support wheel 409 contacts the inner wall of the steel pipeline. At this time, the device can move in the steel pipeline. After the flaw detection device reaches the position to be detected, the second motor 402 continues to rotate, so that the fixed leg 406 continues to extend. At this time, the telescopic head 408 is forced to contract into the fixed leg 406, and the spring 407 is compressed. In this way, the anti-slip pad on the surface of the fixed leg 406 contacts the inner wall of the steel pipeline, completing the position fixation of the flaw detection device.

[0026] The support mechanism includes a bearing box 201. A groove is arranged on the bearing box 201. The ray machine 1 is arranged in the groove. Symmetrically arranged support plates 202 are fixedly connected to the front and back sides of the bearing box 201. The support plates 202 are fixedly connected to the fixed brackets 401. A fixed baffle 203 is bolted to the upper end of the bearing box 201. A position sensor is arranged on the bearing box 201. The staff places the ray machine 1 in the groove on the bearing box 201 and fixes the fixed baffle 203 to the bearing box 201 through bolts. In this way, the limitation of the ray machine 1 is completed. The position sensor can convey the position where the detection device is located, enabling the staff to operate the flaw detection device to reach the position to be detected.

[0027] The driving mechanism includes two meshing transmission gears 302. The transmission gears 302 are rotatably connected to the bearing box 201. A first motor 301 is fixedly connected to the bearing box 201. The output end of the first motor 301 is fixedly connected to one of the transmission gears 302. A pulley 303 is fixedly connected to the lower side of the transmission gear 302. A rotating arm 305 is rotatably connected to the pulley 303. The other end of the rotating arm 305 is rotatably connected to a driving wheel 306. The driving wheel 306 and the pulley 303 are connected and driven by a belt 304. A connecting rod 307 is rotatably connected to one side of the rotating arm 305. A telescopic rod 308 is fixedly connected to the lower side of the bearing box 201. The connecting rod 307 is rotatably connected to the output end of the telescopic rod 308. The surface of the driving wheel 306 is provided with patterns to increase friction. The rotation of the first motor 301 drives the transmission gear 302 to rotate. The rotation of the transmission gear 302 drives the other transmission gear 302 to rotate in the opposite direction. The rotation of the transmission gear 302 drives the pulley 303 to rotate. The rotation of the pulley 303 drives the belt 304 to move. The movement of the belt 304 drives the driving wheel 306 to rotate. The telescopic movement of the telescopic rod 308 drives the connecting rod 307 to move. The movement of the connecting rod 307 drives the rotating arm 305 to rotate, so that the driving wheel 306 contacts the inside of the steel pipe, thus providing power for the advancement of the detection device.

[0028] Working principle: The staff places the ray machine 1 in the groove on the bearing box 201, fixes the fixed baffle 203 on the bearing box 201 with bolts, and places the flaw detection device into the pipeline. The rotation of the second motor 402 drives the first bevel gear 403 to rotate. The rotation of the first bevel gear 403 drives the second bevel gear 404 to rotate. The rotation of the second bevel gear 404 drives the screw 405 to rotate. The rotation of the screw 405 drives the fixed leg 406 and other components thereon to move along the axial direction of the screw 405, so that the support wheel 409 contacts the inner wall of the steel pipe. At this time, the device can move inside the steel pipe. The rotation of the first motor 301 drives the transmission gear 302 to rotate. The rotation of the transmission gear 302 drives the other transmission gear 302 to rotate in the opposite direction. The rotation of the transmission gear 302 drives the pulley 303 to rotate. The rotation of the pulley 303 drives the belt 304 to move. The movement of the belt 304 drives the driving wheel 306 to rotate. The telescopic movement of the telescopic rod 308 drives the connecting rod 307 to move. The movement of the connecting rod 307 drives the rotating arm 305 to rotate, so that the driving wheel 306 contacts the inside of the steel pipe, thus providing power for the advancement of the detection device. After the flaw detection device reaches the position to be detected, the second motor 402 continues to rotate, so that the fixed leg 406 continues to extend. At this time, the telescopic head 408 is forced to contract into the fixed leg 406, and the spring 407 is compressed. In this way, the anti-slip pad on the surface of the fixed leg 406 contacts the inner wall of the steel pipe, completing the position fixation of the flaw detection device, and thus the weld ray flaw detection can be carried out.

[0029] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed.

Claims

1. A natural gas pipeline weld radiographic flaw detection device, comprising a supporting mechanism, characterized in that: A ray machine (1) is arranged on the support mechanism, a driving mechanism is arranged on the lower side of the support mechanism, and moving mechanisms are symmetrically arranged on the front and rear sides of the support mechanism, the moving mechanisms are used to contact the inner wall of the steel pipe, support the movement of the device, and limit the device after reaching a predetermined position, the moving mechanism comprises a fixed bracket (401) fixedly connected to the support mechanism and symmetrically arranged, the fixed bracket (401) is fixedly connected to a second motor (402), the output end of the second motor (402) is fixedly connected to a first bevel gear (403), the first bevel gear (403) is rotatably connected to the fixed bracket (401), and the first bevel gear (403) is rotatably connected to the fixed bracket (401). One side of the gear (403) is meshed with a plurality of second bevel gears (404) evenly arranged on a circumference, the second bevel gears (404) are rotatably connected to the fixed bracket (401), one end of the second bevel gear (404) is fixedly connected with a screw rod (405), a fixed leg (406) is threadedly connected to the screw rod (405), a telescopic head (408) is slidably connected to the upper end of the fixed leg (406), a spring (407) is fixedly connected between the telescopic head (408) and the fixed leg (406), and one end of the telescopic head (408) away from the spring (407) is rotatably connected to a support wheel (409).

2. A natural gas pipeline weld radiographic flaw detection device according to claim 1, characterized in that: The supporting mechanism comprises a carrying box (201), the carrying box (201) is provided with a groove, the X-ray machine (1) is arranged in the groove, the front and rear sides of the carrying box (201) are fixedly connected with symmetrically arranged supporting plates (202), the supporting plates (202) are fixedly connected to the fixed bracket (401), and the upper end of the carrying box (201) is bolted with a fixed baffle (203).

3. A natural gas pipeline weld radiographic flaw detection device according to claim 2, characterized in that: The driving mechanism comprises two mutually meshing transmission gears (302), the transmission gears (302) are rotationally connected to the carrying box (201), a first motor (301) is fixedly connected to the carrying box (201), an output end of the first motor (301) is fixedly connected to one of the transmission gears (302), a pulley (303) is fixedly connected to the lower side of the transmission gear (302), a rotating arm (305) is rotationally connected to the pulley (303), the other end of the rotating arm (305) is rotationally connected to a driving wheel (306), the driving wheel (306) and the pulley (303) are connected and transmitted via a belt (304), one side of the rotating arm (305) is rotationally connected to a connecting rod (307), a telescopic rod (308) is fixedly connected to the lower side of the carrying box (201), and the connecting rod (307) is rotationally connected to the output end of the telescopic rod (308).

4. A natural gas pipeline weld radiographic flaw detection device according to claim 1, characterized in that: A flexible anti-skid pad is provided at one end of the fixed leg (406) close to the inner wall of the steel pipe.

5. A natural gas pipeline weld radiographic flaw detection device according to claim 3, characterized in that: The surface of the driving wheel (306) is provided with a pattern for increasing friction.

6. A natural gas pipeline weld radiographic flaw detection device according to claim 2, characterized in that: The carrying box (201) is provided with a position sensor.

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