Nondestructive testing device for cracks of natural gas pipeline

Abstract

The utility model provides a natural gas pipeline crack nondestructive testing device which comprises a half sleeve I and a nondestructive testing assembly, a half sleeve II matched with the half sleeve I in specification is arranged below the half sleeve I, spiral sliding grooves are formed in the surfaces of the half sleeve I and the half sleeve II, the nondestructive testing assembly is arranged in the spiral sliding grooves, and the nondestructive testing assembly is arranged in the spiral sliding grooves. Compared with the prior art, the nondestructive testing device has the following beneficial effects that the nondestructive testing assembly is arranged, the rolling ball is driven by the rotating shaft to rub along the inner side of the rolling groove, so that the movable base is driven to move along the spiral sliding groove, and the nondestructive testing device is convenient to use. Therefore, the movable base spirally moves along the spiral sliding groove and is matched with the first half sleeve and the second half sleeve to move back and forth along the outer side of the natural gas pipeline, so that the detection range and the detection flexibility of the detection device are greatly increased, and the detection efficiency is remarkably improved.

Description

Technical Field

[0001] This utility model belongs to the field of monitoring device technology, and specifically relates to a non-destructive testing device for cracks in natural gas pipelines. Background Technology

[0002] Non-destructive testing (NDT) devices for natural gas pipeline cracks are technical equipment used to detect cracks, corrosion, or other defects inside or outside natural gas pipelines. Their core purpose is to assess the integrity and safety of the pipeline without damaging its structure. Existing crack detection devices typically employ magnetic particle testing. This involves coating the pipeline surface with magnetic powder and applying a magnetic field. If a crack is present, a leakage magnetic field is created at that location, attracting the magnetic powder to accumulate, thus revealing the crack's location. The advantage of this method is that the accumulation of magnetic powder at the defect creates a clearly visible trace, making the location, size, and shape of the defect readily apparent, facilitating observation and recording. However, its disadvantages include the complex procedures required for magnetic particle testing, consuming significant time in preliminary preparation, and low detection efficiency, especially when inspecting long natural gas pipelines. Therefore, a new structure is proposed to address these issues. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a non-destructive testing device for cracks in natural gas pipelines, thereby solving the problems mentioned in the background art.

[0004] This utility model is achieved through the following technical solution: a non-destructive testing device for cracks in natural gas pipelines, comprising: a first half-sleeve and a non-destructive testing component, wherein a second half-sleeve matching its specifications is provided below the first half-sleeve, and spiral grooves are formed on the surfaces of the first half-sleeve and the second half-sleeve.

[0005] The spiral groove is equipped with a non-destructive testing component. The non-destructive testing component includes a movable base for moving the support rod. A rolling ball is connected to the front and rear sides of the movable base through a rotating shaft.

[0006] In a preferred embodiment, the upper inner surface of the half-sleeve is provided with several sets of ball grooves from front to back. Each set of ball grooves is embedded with a ball. Several sets of ball grooves form a rolling group, and the rolling group has two sets of the same specifications.

[0007] In a preferred embodiment, the second half-sleeve is the same size as the first half-sleeve and is arranged in a mirror image symmetrically. The bottom of the first half-sleeve and the top of the second half-sleeve are fitted together and fixed by a buckle. The first half-sleeve and the second half-sleeve are installed on the outside of the natural gas pipeline.

[0008] In a preferred embodiment, four sets of rollers are equidistantly installed on the left and right sides inside the second half-sleeve. The outer side of each set of rollers is driven by a motor, and the inner side of each roller is in contact with the outer side of the natural gas pipeline. The top of the natural gas pipeline is in contact with the bottom of several sets of balls. Through the friction between the four sets of rollers and the outer side of the natural gas pipeline, the first and second half-sleeves are moved flexibly along the outer side of the natural gas pipeline. At the same time, the bottom of several sets of balls contacts and rubs against the top of the natural gas pipeline, thereby making the movement of the first and second half-sleeves more stable.

[0009] In a preferred embodiment, the bottom of the second half-sleeve is provided with a stabilizing ball for stabilizing the first half-sleeve and the second half-sleeve. The top of the stabilizing ball is fixed to the center of the bottom of the second half-sleeve via a connecting rod. The stabilizing ball can lower the center of gravity of the entire detection device, thus preventing the first half-sleeve and the second half-sleeve from flipping over during movement, and ensuring the stability of the movement of the first half-sleeve and the second half-sleeve.

[0010] In a preferred embodiment, the spiral grooves are distributed in a spiral structure on the outer sides of half-sleeve one and half-sleeve two, and the spiral grooves on the outer sides of half-sleeve one and half-sleeve two are continuous, with the bottom of the spiral grooves being hollow.

[0011] In a preferred embodiment, rolling grooves are respectively provided on the front and rear sidewalls of the inner side of the spiral groove. The width of the rolling groove matches the radius of the rolling ball. The rolling ball is located inside the rolling groove. On the one hand, it plays the role of driving the moving base to move by rubbing and rolling along the rolling groove. On the other hand, it plays the role of restricting the moving base inside the spiral groove to prevent the moving base from detaching when it moves to the bottom of the second half-sleeve.

[0012] In a preferred embodiment, the outer side of the rolling ball is bonded with a rubber layer, the rolling ball is connected to the built-in motor inside the movable base via a rotating shaft, and the top of the movable base is provided with a support rod.

[0013] In a preferred embodiment, the support rod has an L-shaped structure, and a DR imaging machine is installed on the lower front side of the support rod, with the detection surface of the DR imaging machine facing the natural gas pipeline.

[0014] After adopting the above technical solution, the beneficial effects of this utility model are as follows: 1. By setting up half-sleeve one and half-sleeve two, spiral grooves are opened on the outer side of half-sleeve one and half-sleeve two, several sets of balls are embedded in the upper inner surface of half-sleeve one, four sets of rollers are installed on the inner side of half-sleeve two, and a stabilizing ball is provided at the bottom of half-sleeve two. In actual use, the four sets of rollers roll along the outer side of the natural gas pipeline under the drive of the motor, while the bottom of several sets of balls rubs against the top of the natural gas pipeline, so that half-sleeve one and half-sleeve two can move freely along the outer side of the natural gas pipeline, which improves the flexibility and detection range of the non-destructive testing device, and thus helps to improve the efficiency of testing.

[0015] 2. By setting up a non-destructive testing (NDT) component, which includes a movable base and rolling balls, the movable base is placed inside the spiral groove. A rolling ball is connected to the front and rear positions of the movable base via a rotating shaft. The two sets of rolling balls are located inside the rolling grooves at the front and rear positions inside the spiral groove. Therefore, the rotating shafts drive the rolling balls to rub along the inner side of the rolling grooves, thereby driving the movable base to move along the spiral groove. A DR imaging machine for non-destructive testing of natural gas pipelines is connected to the top of the movable base via a support rod. Thus, by the spiral movement of the movable base along the spiral groove, and in conjunction with the front and rear movement of half-casing one and half-casing two along the outer side of the natural gas pipeline, the detection range and flexibility of the testing device are greatly increased, thus significantly improving the detection efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a non-destructive testing device for cracks in natural gas pipelines according to the present invention.

[0018] Figure 2 This is a schematic diagram of the internal structure of a semi-casing in a non-destructive testing device for cracks in a natural gas pipeline according to this utility model.

[0019] Figure 3 This is a schematic diagram of the internal structure of the second half-sleeve in the non-destructive testing device for cracks in natural gas pipelines according to this utility model.

[0020] Figure 4 This is a schematic diagram showing the position of the rolling groove in a non-destructive testing device for cracks in natural gas pipelines according to this utility model.

[0021] Figure 5 This is a schematic diagram of the non-destructive testing component in a non-destructive testing device for cracks in a natural gas pipeline according to this utility model.

[0022] In the diagram, 100 - half-sleeve 1, 110 - ball groove, 111 - ball bearing;

[0023] 200-Half-sleeve II, 210-Roller, 220-Stabilizing ball;

[0024] 300 - Spiral groove, 310 - Rolling groove;

[0025] 400 - Non-destructive testing components, 410 - Movable base, 420 - Support rod, 430 - Rotating shaft, 431 - Rolling ball, 440 - DR imaging machine. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only one aspect of the present utility model, and not all aspects. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0027] Please see Figures 1 to 5 A non-destructive testing device for cracks in a natural gas pipeline includes: a first half-casing 100 and a non-destructive testing component 400. A second half-casing 200 with matching specifications is provided below the first half-casing 100. Spiral grooves 300 are formed on the surfaces of the first half-casing 100 and the second half-casing 200.

[0028] The spiral chute 300 is equipped with a non-destructive testing component 400. The non-destructive testing component 400 includes a movable base 410 for moving the support rod 420. A rolling ball 431 is connected to the front and rear sides of the movable base 410 through a rotating shaft 430.

[0029] The inner upper surface of the half-sleeve 100 is provided with several sets of ball grooves 110 from front to back. Each set of ball grooves 110 has a ball 111 embedded inside. Several sets of ball grooves 110 form a rolling group. The rolling group has two sets of the same specifications.

[0030] Half-casing 200 and half-casing 100 have the same specifications and are arranged in a mirror image. The bottom of half-casing 100 and the top of half-casing 200 are fitted together and fixed by a buckle. Half-casing 100 and half-casing 200 are installed on the outside of the natural gas pipeline.

[0031] Four sets of rollers 210 are equidistantly installed on the left and right sides inside the second half-casing 200. The outer side of each set of rollers 210 is driven by a motor. The inner side of each roller 210 is in contact with the outer side of the natural gas pipeline, and the top of the natural gas pipeline is in contact with the bottom of several sets of balls 111. Through the friction between the four sets of rollers 210 and the outer side of the natural gas pipeline, the first half-casing 100 and the second half-casing 200 are moved flexibly along the outer side of the natural gas pipeline. At the same time, the bottom of several sets of balls 111 is in contact with the top of the natural gas pipeline, which makes the movement of the first half-casing 100 and the second half-casing 200 more stable.

[0032] The bottom of the second half-sleeve 200 is provided with a stabilizing ball 220 for stabilizing the first half-sleeve 100 and the second half-sleeve 200. The top of the stabilizing ball 220 is fixed to the center of the bottom of the second half-sleeve 200 by a connecting rod. The stabilizing ball 220 can lower the center of gravity of the entire detection device, thus preventing the first half-sleeve 100 and the second half-sleeve 200 from overturning during movement, and ensuring the movement stability of the first half-sleeve 100 and the second half-sleeve 200.

[0033] The spiral groove 300 is distributed in a spiral structure on the outside of the first half-sleeve 100 and the second half-sleeve 200, and the spiral groove 300 on the outside of the first half-sleeve 100 and the second half-sleeve 200 is continuous. The bottom of the spiral groove 300 is hollow.

[0034] Rolling grooves 310 are respectively provided on the front and rear side walls of the inner side of the spiral groove 300. The width of the rolling groove 310 matches the radius of the rolling ball 431. The rolling ball 431 is located inside the rolling groove 310. On the one hand, it plays a role in driving the moving base 410 to move by rubbing and rolling along the rolling groove 310. On the other hand, it plays a role in restricting the moving base 410 inside the spiral groove 300 to prevent the moving base 410 from detaching when it moves to the bottom of the second half sleeve 200.

[0035] The outer side of the rolling ball 431 is glued with a rubber layer. The rolling ball 431 is connected to the built-in motor inside the movable base 410 through the rotating shaft 430. The top of the movable base 410 is provided with a support rod 420.

[0036] The support rod 420 has an L-shaped structure, and a DR imaging machine 440 is installed on the lower front side of the support rod 420. The detection surface of the DR imaging machine 440 faces the natural gas pipeline.

[0037] Example 1: Please refer to Figures 1 to 3In actual use, the bottom of half-sleeve 100 and the top of half-sleeve 200 are fitted together and fixed by clips. The clips are located on the front and rear sides of half-sleeve 100 and half-sleeve 200. After half-sleeve 100 and half-sleeve 200 are installed on the outside of the natural gas pipeline, the stabilizing ball 220 at the bottom of half-sleeve 200 lowers the center of gravity of the detection device, thereby preventing half-sleeve 100 and half-sleeve 200 from flipping over during the detection process, which would affect the overall stability of the detection device. Under the action of the stabilizing ball 220, half-sleeve 100 and half-sleeve 200 tend to move downwards. Several sets of ball grooves 110 are provided at the top, and each set of ball grooves 110 is embedded with a ball bearing 111. The ball bearing 111 is made of hard rubber to prevent the natural gas pipeline from being damaged by the compression of the ball bearing 111. The bottom of the several sets of ball bearings 111 contacts the top of the natural gas pipeline. Four sets of rollers 210 are installed at equal intervals on the inner side of the second half-sleeve 200. Each set of rollers 210 is driven by a motor on its outer side, and the inner side of the rollers 210 contacts the surface of the natural gas pipeline. A flexible rubber ring is glued to the outer side of the rollers 210 to increase the friction with the surface of the natural gas pipeline, so as to better drive the first half-sleeve 100 and the second half-sleeve 200 to move.

[0038] In actual use, after installing half-sleeve 100 and half-sleeve 200 on the outside of the natural gas pipeline, four sets of motors are started (the motors are existing technology, and their internal structure and working principle will not be described in detail here). The four sets of motors are synchronous mechanisms, each driving its corresponding roller 210 to rotate in the same direction. Therefore, through the friction between the roller 210 and the outside of the natural gas pipeline, half-sleeve 100 and half-sleeve 200 are moved freely along the outside of the natural gas pipeline. At the same time, the bottoms of several sets of ball bearings 111 contact the top of the natural gas pipeline, and half-sleeve 100 and half-sleeve 200... When the second half-casing 200 moves, the bottoms of several sets of balls 111 rub against the top of the natural gas pipeline, causing the balls 111 to rotate inside their respective ball grooves 110. This makes the movement of the first half-casing 100 and the second half-casing 200 more stable. Therefore, the final effect is that by setting four sets of rollers 210 and several sets of balls 111, the first half-casing 100 and the second half-casing 200 can move flexibly along the outside of the natural gas pipeline, which greatly increases the flexibility of the detection device and improves the detection range of the non-destructive testing device, thereby helping to improve the efficiency of the detection.

[0039] Example 2: Please refer to Figures 1 to 5As the first half-casing 100 and the second half-casing 200 move flexibly along the outside of the natural gas pipeline, spiral grooves 300 are formed on the surfaces of the first half-casing 100 and the second half-casing 200. These spiral grooves 300 are continuously distributed on the surfaces of the first half-casing 100 and the second half-casing 200. The bottom of the spiral grooves 300 has a hollow structure to reduce the overall weight of the detection device. Rolling grooves 310 are formed on the front and rear inner walls of the spiral grooves 300. A non-destructive testing component 400 is installed inside the spiral grooves 300. The non-destructive testing component 400 includes a movable base 410 and a rolling ball 431. The movable base 410... A rolling ball 431 is connected to the rear side via a rotating shaft 430. The rolling ball 431 is connected to the built-in motor inside the movable base 410 via the rotating shaft 430. The two sets of rolling balls 431 are a synchronous mechanism. The two sets of rolling balls 431 are respectively located inside the two sets of rolling grooves 310. The top of the movable base 410 is provided with an L-shaped support plate. A DR imaging machine 440 for imaging and detecting natural gas pipelines is installed on the lower front side of the support plate (DR imaging machine 440 is existing technology, and its internal structure and working principle will not be described here). The detection surface of the DR imaging machine 440 faces the natural gas pipeline.

[0040] In actual use, half-casing 100 and half-casing 200 move back and forth on a selected section of the outer side of the natural gas pipeline. At the same time, two sets of rolling balls 431 rub and roll inside their respective rolling grooves 310, thereby driving the movable base 410 to move spirally along the spiral groove 300. It should be noted that the two sets of rolling balls 431 are located inside their respective rolling grooves 310. On the one hand, they drive the movable base 410 to move through rotational friction. On the other hand, they firmly restrict the movable base 410 inside the spiral groove 300. Therefore, even if the non-destructive testing component 400 moves to below half-casing 200, the movable base 410 will not detach from the spiral groove 300. Thus, by the movable base 410 sliding spirally along the spiral groove 300, the DR imaging machine 440 performs spiral imaging inspection of the natural gas pipeline. With the flexible movement of half-casing 100 and half-casing 200, the inspection area and inspection flexibility of the natural gas pipeline are greatly increased, thereby significantly improving the inspection efficiency of the natural gas pipeline.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for non-destructive testing of a crack in a natural gas pipeline, comprising: Semi-casing one (100) and nondestructive testing assembly (400), characterized in that: the semi-casing one (100) is provided below with a semi-casing two (200) matched with it, and the semi-casing one (100) and the semi-casing two (200) are provided with spiral sliding grooves (300) on surfaces thereof; The spiral sliding groove (300) is internally provided with the nondestructive testing assembly (400), and the nondestructive testing assembly (400) comprises a moving base (410) for driving a support rod (420) to move, and the moving base (410) is connected with a rolling ball (431) through a rotating shaft (430) at front and rear sides thereof.

2. A device for non-destructive testing of a natural gas pipeline for cracks as claimed in claim 1, wherein: A plurality of groups of ball grooves (110) are sequentially provided on the inner upper surface of the semi-casing one (100) from front to back, each group of the ball grooves (110) is internally embedded with a rolling ball (111), and the plurality of groups of the ball grooves (110) form a rolling group, and the rolling group is provided with two groups of same specifications.

3. A device for non-destructive testing of a natural gas pipeline for cracks as claimed in claim 1, wherein: The semi-casing two (200) is provided with the same specifications as the semi-casing one (100) and is provided in a mirror image symmetry, the semi-casing one (100) and the semi-casing two (200) are embeddedly connected between the bottom of the semi-casing one (100) and the top of the semi-casing two (200) and are fixed through buckles, and the semi-casing one (100) and the semi-casing two (200) are installed outside a natural gas pipeline.

4. A device for non-destructive testing of a natural gas pipeline for cracks as claimed in claim 3, wherein: Four groups of rollers (210) are equidistantly installed at left and right sides inside the semi-casing two (200), the outer sides of each group of the rollers (210) are driven through an electric motor, the inner sides of the rollers (210) are in contact with the outer side of the natural gas pipeline, and the top of the natural gas pipeline is in contact with the bottom of the plurality of groups of rolling balls (111).

5. A device for non-destructive testing of a natural gas pipeline for cracks as claimed in claim 4, wherein: The semi-casing two (200) is provided with a stabilizing ball (220) at the bottom thereof for stabilizing the semi-casing one (100) and the semi-casing two (200), and the stabilizing ball (220) is fixed through a connecting rod at the top thereof and the bottom center of the semi-casing two (200).

6. A device for non-destructive testing of a natural gas pipeline for cracks as recited in claim 1, wherein: The spiral sliding groove (300) is distributed in a spiral structure outside the semi-casing one (100) and the semi-casing two (200), and the spiral sliding grooves (300) outside the semi-casing one (100) and the semi-casing two (200) are provided in a continuous structure, and the bottom of the spiral sliding groove (300) is provided in a hollow structure.

7. A device for non-destructive testing of a natural gas pipeline for cracks as claimed in claim 6, wherein: Rolling grooves (310) are provided on the front and rear sidewalls of the inner side of the spiral sliding groove (300), and the width of the rolling groove (310) is matched with the radius length of the rolling ball (431).

8. A device for non-destructive testing of a natural gas pipeline for cracks as claimed in claim 7, wherein: The rolling ball (431) is glued with a rubber layer on the outer side thereof, the rolling ball (431) is connected with an internal built-in electric motor in the moving base (410) through the rotating shaft (430), and the moving base (410) is provided with the support rod (420) at the top thereof.

9. A device for non-destructive testing of a natural gas pipeline for cracks as claimed in claim 8, wherein: The support rod (420) is provided in an L-shaped structure, the DR imaging machine (440) is installed below the front side of the support rod (420), and the detection surface of the DR imaging machine (440) faces the natural gas pipeline.

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