Steel pipe flaw detection device

Abstract

The utility model relates to the technical field of steel pipe flaw detection, and discloses a steel pipe flaw detection device which comprises a flaw detection module, clamping rollers are respectively arranged above a first adjusting plate and a second adjusting plate, clamping positioning adjusting assemblies are arranged on the side edges of the first adjusting plate and the second adjusting plate, and the clamping positioning adjusting assemblies are arranged on the side edges of the first adjusting plate and the second adjusting plate. The tooth rollers are meshed with the clamping teeth and used for driving the semi-arc sliding plates to move in the semi-arc frames, and detection positioning adjusting assemblies are arranged on the side edges of the upper semi-arc frame and the lower semi-arc frame. According to the steel pipe flaw detection device, the steel pipe is centered, clamped and positioned through the first adjusting plate and the second adjusting plate, and the two semicircular arc frames are centered and combined, so that the flaw detection module annularly moves for flaw detection about the axis of the steel pipe, the flaw detection error is small, and the flaw detection accuracy is high.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe flaw detection, in particular to a steel pipe flaw detection device. Background Art

[0002] The main purpose of steel pipe flaw detection is to detect the defects inside and on the surface of the steel pipe to ensure its quality and safety. Common detection methods include ultrasonic flaw detection, magnetic particle flaw detection, eddy current flaw detection, etc. For ultrasonic flaw detection, the probe is placed on the surface of the steel pipe or flaw detection is carried out with the help of a coupling medium. The probe receives the reflected ultrasonic signal and converts it into an electrical signal. The computer processes and analyzes the signal, and judges whether there are defects inside the steel pipe according to the characteristics of the reflected signal (such as amplitude, time difference, etc.), as well as the position, size and nature of the defects.

[0003] The Chinese utility model patent with the patent number CN202323012308.1 discloses a portable steel pipe non-destructive testing flaw detector. During detection, the whole device can be directly pushed to complete long-distance detection tasks. However, during the steel pipe flaw detection process, the flaw detection module needs to perform a circular detection on the entire steel pipe. In the comparative document, it cannot ensure that the center of the circular rotation of the flaw detection module is concentric with the circular steel pipe, which may cause a deviation in the probe position, resulting in flaw detection errors and affecting the accuracy and reliability of the flaw detection results. Therefore, we make improvements on this and propose a steel pipe flaw detection device. Summary of the Utility Model

[0004] In view of the problem that in the existing steel pipe flaw detection process, it is impossible to ensure that the center of the circular rotation of the flaw detection module is concentric with the circular steel pipe, which may cause flaw detection errors, the present utility model is proposed.

[0005] Therefore, the purpose of the present utility model is to provide a steel pipe flaw detection device, and its purpose is: by using the first adjusting plate and the second adjusting plate to center and clamp and position the steel pipe, and the two semi-circular frames are centered and combined, so that the flaw detection module moves circularly around the axis of the steel pipe for flaw detection, with small flaw detection errors and high flaw detection accuracy.

[0006] To solve the above technical problems, the present utility model provides the following technical solution: A steel pipe flaw detection device, including a flaw detection module, further includes two placement seats. Between the two placement seats, a first adjustment plate and a second adjustment plate are arranged vertically. Above the first adjustment plate and above the second adjustment plate, clamping rollers are respectively installed. On the sides of the first adjustment plate and the second adjustment plate, a clamping and positioning adjustment assembly is provided. The clamping and positioning adjustment assembly includes a second operation disk, and the second operation disk is used to adjust the distance between the upper and lower clamping rollers. Below the first adjustment plate and above the second adjustment plate, semi-circular frames are respectively provided. Inside the semi-circular frames, semi-circular sliding plates are slidably arranged. On the outer wall of the semi-circular sliding plates, a number of teeth are equidistantly arranged. The flaw detection module is assembled on the inner side wall of one of the semi-circular sliding plates. On the outer wall of one of the semi-circular frames, a motor is installed. The output shaft of the motor is connected to a toothed roller, and the toothed roller meshes with the teeth to drive the semi-circular sliding plate to move inside the semi-circular frame. On the sides of the upper and lower groups of semi-circular frames, a detection and positioning adjustment assembly is provided. The detection and positioning adjustment assembly includes a first operation disk, and the first operation disk is used to drive the two semi-circular frames to merge or separate.

[0007] As a preferred solution of the steel pipe flaw detection device of the present utility model, wherein: The inner diameter of the circular arc formed by the merger of the upper and lower groups of semi-circular frames is larger than the outer diameter of the steel pipe to be flaw-detected.

[0008] As a preferred solution of the steel pipe flaw detection device of the present utility model, wherein: The detection and positioning adjustment assembly further includes a first worm gear sleeve movably installed above the first adjustment plate. Above the first adjustment plate, a first worm is movably installed and is matched with the first worm gear sleeve. The first operation disk is concentrically installed at one end of the first worm.

[0009] As a preferred solution of the steel pipe flaw detection device of the present utility model, wherein: The first worm gear sleeve is concentrically installed with a first lead screw. The first lead screw movably penetrates to the lower part of the first adjustment plate. Above the second adjustment plate, a second lead screw is movably connected. A slot is opened at the top of the second lead screw. A plug post is installed at the bottom of the first lead screw. The plug post is axially inserted and matched with the slot to drive the first lead screw and the second lead screw to rotate concentrically. On the outer sides of the first lead screw and the second lead screw, first moving seats are respectively assembled. On the lower part of the first adjustment plate and above the second adjustment plate, multiple groups of limit baffles are respectively installed. The limit baffles are located on both sides of the first moving seats. Between the first lead screws on both sides below the first adjustment plate, they are connected by a synchronous belt. Between the second lead screws on both sides above the second adjustment plate, they are connected by a synchronous belt.

[0010] As a preferred embodiment of the steel pipe flaw detection device of the present utility model, wherein: the clamping and positioning adjustment assembly further includes support frames installed on both sides below the first adjustment plate. One side of each support frame is movably installed with a second worm and a second worm gear sleeve that mesh with each other. The second operation disk is concentrically installed at one end of the second worm. The second worm gear sleeve is concentrically connected to a third lead screw. A second moving seat is assembled outside the third lead screw, and the second moving seat is fixedly connected to the second adjustment plate.

[0011] As a preferred embodiment of the steel pipe flaw detection device of the present utility model, wherein: a handrail is installed on one side of the limit baffle. Two sets of clamping rollers assembled on the first adjustment plate or the second adjustment plate are provided, and the two sets are respectively arranged on both sides of the semi-circular frame.

[0012] As a preferred embodiment of the steel pipe flaw detection device of the present utility model, wherein: the cross-section of the insertion post is a polygonal structure, and the cross-section of the insertion slot is a polygonal structure that cooperates with the insertion post. The first moving seat assembled outside the first lead screw is installed on the outer wall of the upper semi-circular frame through a connecting frame, and the first moving seat assembled outside the second lead screw is installed on the outer wall of the lower semi-circular frame through a connecting frame.

[0013] As a preferred embodiment of the steel pipe flaw detection device of the present utility model, wherein: a through hole is opened at a position of one semi-circular frame close to the gear roller. A chute in a semi-circular arc structure is opened inside the semi-circular frame, and the through hole communicates with the chute. The cross-sections of the semi-circular arc slide plate and the chute are respectively in a T-shaped structure, and the semi-circular arc slide plate and several teeth are limited to slide in the chute.

[0014] Advantages of the present utility model:

[0015] 1. In the present utility model, by using the first adjustment plate and the second adjustment plate to perform centering clamping and positioning on the steel pipe, and the two semi-circular frames are centered and combined, so that the flaw detection module moves in a circular motion around the axis of the steel pipe for flaw detection, with small flaw detection error and high flaw detection accuracy.

[0016] 2. In the present utility model, by manually rotating the second operation disk or the first operation disk, the positioning can be controlled, and the placement of the steel pipe does not affect the accuracy of the positioning, improving the convenience of the positioning of the flaw detection device.

[0017] 3. In the present utility model, by using the first worm to drive and control the first worm gear sleeve, and the second worm to drive and control the second worm gear sleeve, the stability of the clamping and positioning of the steel pipe by the upper and lower clamping rollers is improved, and the stability of the combined state of the upper and lower semi-circular frames is improved. Description of the drawings

[0018] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the attached drawings required for the description of the embodiments. Obviously, the attached drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other attached drawings can also be obtained based on these drawings. Among them:

[0019] Figure 1 It is a schematic diagram of the overall structure of the steel pipe flaw detection device of the present utility model.

[0020] Figure 2 It is a schematic side view structure diagram of the steel pipe flaw detection device of the present utility model.

[0021] Figure 3 It is a schematic structure diagram of the detection positioning adjustment component of the steel pipe flaw detection device of the present utility model.

[0022] Figure 4 It is a schematic structure diagram of two groups of semi-circular frames of the steel pipe flaw detection device of the present utility model.

[0023] Figure 5 It is a schematic exploded structure diagram of the semi-circular frame and the semi-circular slide plate of the steel pipe flaw detection device of the present utility model.

[0024] Explanation of reference numerals:

[0025] 1. Placing seat; 2. First adjusting plate; 3. Second adjusting plate; 4. Clamping roller; 5. Semi-circular frame; 51. Through hole; 52. Chute; 6. Detection positioning adjustment component; 61. First lead screw; 62. Second lead screw; 63. First moving seat; 64. Insertion post; 65. Slot; 66. First worm gear sleeve; 67. First worm; 68. First operation disk; 7. Clamping positioning adjustment component; 71. Third lead screw; 72. Second moving seat; 73. Second worm gear sleeve; 74. Second worm; 75. Second operation disk; 76. Support frame; 8. Handrail; 9. Limit baffle; 10. Connecting frame; 11. Flaw detection module; 12. Toothed roller; 13. Motor; 14. Semi-circular slide plate; 15. Engaging teeth. Specific embodiments

[0026] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will make a detailed description of the specific embodiments of the present utility model in conjunction with the attached drawings of the specification.

[0027] Embodiment 1

[0028] Refer to Figures 1-5, which is the first embodiment of the present utility model, provides a steel pipe flaw detection device. This steel pipe flaw detection device includes a flaw detection module 11. The flaw detection module 11 includes a flaw detection probe and a flaw detection control module. It also includes two placement seats 1. Between the two placement seats 1, there are a first adjustment plate 2 and a second adjustment plate 3 arranged vertically. Above the first adjustment plate 2 and above the second adjustment plate 3, there are respectively installed clamping rollers 4. The clamping rollers 4 can roll along the axial direction of the steel pipe to facilitate the movement of the flaw detection device along the axial direction of the steel pipe. On the sides of the first adjustment plate 2 and the second adjustment plate 3, there is a clamping and positioning adjustment component 7. The clamping and positioning adjustment component 7 includes a second operation disk 75. The second operation disk 75 is used to adjust the distance between the upper and lower clamping rollers 4. The steel pipe is clamped and positioned by the upper and lower clamping rollers 4, so that the distance between the first adjustment plate 2 and the second adjustment plate 3 is adjusted, making the midpoint between the first adjustment plate 2 and the second adjustment plate 3 at this time the center of the steel pipe. Below the first adjustment plate 2 and above the second adjustment plate 3, there are respectively provided semi-circular frames 5. The two semi-circular frames 5 are symmetrically arranged up and down with respect to the central plane of the first adjustment plate 2 and the second adjustment plate 3. Inside the semi-circular frame 5, there is a sliding semi-circular slide plate 14. On the outer wall of the semi-circular slide plate 14, there are a number of equally spaced teeth 15. The flaw detection module 11 is assembled on the inner side wall of one of the semi-circular slide plates 14. On the outer wall of one of the semi-circular frames 5, there is a motor 13. The output shaft of the motor 13 is connected to a toothed roller 12. The toothed roller 12 meshes with the teeth 15 to drive the semi-circular slide plate 14 to move inside the semi-circular frame 5. On the sides of the upper and lower groups of semi-circular frames 5, there is a detection and positioning adjustment component 6. The detection and positioning adjustment component 6 includes a first operation disk 68. The first operation disk 68 is used to drive the two semi-circular frames 5 to merge or separate. In the merged state of the two semi-circular frames 5, a complete circular ring structure is formed. The corresponding two semi-circular slide plates 14 form a concentric circular ring structure. The two semi-circular slide plates 14 move circumferentially inside the two semi-circular frames 5 to drive the flaw detection module 11 to perform circular movement flaw detection.

[0029] Combined with the attached Figure 1 and Figure 2 , the inner diameter of the circular arc formed by the merger of the upper and lower groups of semi-circular frames 5 is larger than the outer diameter of the steel pipe to be flaw-detected. During the flaw detection process of the steel pipe, it is clamped by the upper and lower clamping rollers 4, and the clamping rollers 4 drive the flaw detection device to move along the axial direction of the steel pipe, while the flaw detection module 11 inside the semi-circular slide plate 14 moves circumferentially between the outer wall of the steel pipe and the inner side of the semi-circular frame 5 for flaw detection.

[0030] Combined with the attached Figure 2 and Figure 3, the detection and positioning adjustment assembly 6 further includes a first worm gear sleeve 66 movably installed above the first adjustment plate 2. A first worm 67 that cooperates with the first worm gear sleeve 66 is movably installed above the first adjustment plate 2. A first operation disk 68 is concentrically installed at one end of the first worm 67. By rotating the first operation disk 68, the first worm 67 rotates. The first worm 67 meshes with the first worm gear sleeve 66 to drive the first worm gear sleeve 66 to rotate. The cooperation between the first worm gear sleeve 66 and the first worm 67 can utilize the frictional force of meshing to prevent the first worm gear sleeve 66 from driving the first worm 67 to rotate.

[0031] Combined with the attached Figures 1-3 , a first lead screw 61 is concentrically installed on the first worm gear sleeve 66. The first lead screw 61 movably penetrates to the lower side of the first adjustment plate 2. A second lead screw 62 is movably connected above the second adjustment plate 3. A slot 65 is formed at the top of the second lead screw 62. A plug post 64 is installed at the bottom of the first lead screw 61. The plug post 64 is axially inserted and matched with the slot 65 to drive the first lead screw 61 and the second lead screw 62 to rotate concentrically. First moving seats 63 are respectively assembled outside the first lead screw 61 and the second lead screw 62. Multiple groups of limit baffles 9 are respectively installed below the first adjustment plate 2 and above the second adjustment plate 3. The limit baffles 9 are located on both sides of the first moving seats 63. The first lead screws 61 on both sides below the first adjustment plate 2 are connected by a synchronous belt. The second lead screws 62 on both sides above the second adjustment plate 3 are connected by a synchronous belt. The first lead screw 61 and the second lead screw 62 are respectively provided with thread structures having the same pitch and opposite thread directions. When the first worm gear sleeve 66 rotates, when the first moving seat 63 on the first lead screw 61 moves downward, the first moving seat 63 on the second lead screw 62 moves upward; when the first worm gear sleeve 66 rotates in reverse, the two first moving seats 63 move in opposite directions respectively.

[0032] Combined with the attached Figure 1 and Figure 2 , the clamping and positioning adjustment assembly 7 further includes support frames 76 installed on both sides below the first adjustment plate 2. A second worm 74 and a second worm gear sleeve 73 that mesh with each other are movably installed on one side of the support frame 76. A second operation disk 75 is concentrically installed at one end of the second worm 74. The second worm gear sleeve 73 is concentrically connected to a third lead screw 71. A second moving seat 72 is assembled outside the third lead screw 71. The second moving seat 72 is fixedly connected to the second adjustment plate 3. When the second operation disk 75 is rotated, the second worm 74 drives the second worm gear sleeve 73 to rotate, so that the third lead screw 71 rotates. Moreover, under the insertion limit of the plug post 64 and the slot 65, the second moving seat 72 drives the second adjustment plate 3 to move towards the direction close to the second adjustment plate 3 or move away from the second adjustment plate 3.

[0033] Combined with the attached Figure 1 and Figure 2, a handrail 8 is installed on one side of the limit baffle 9. The setting of the handrail 8 facilitates the movement of the flaw detection device. Two sets of clamping rollers 4 are assembled on the first adjusting plate 2 or the second adjusting plate 3, and the two sets are respectively arranged on both sides of the semi-circular frame 5, so that when the flaw detection device is pushed to move, the two combined semi-circular frames 5 can ensure the coaxial state with the steel pipe.

[0034] Combined with the attached Figure 2 and Figure 3 , the cross-section of the insertion post 64 is a polygonal structure, and the cross-section of the insertion slot 65 is a polygonal structure that cooperates with the insertion post 64, so that the first lead screw 61 and the second lead screw 62 can move axially and rotate coaxially at the same time. The first moving seat 63 assembled outside the first lead screw 61 is installed on the outer wall of the upper semi-circular frame 5 through the connecting frame 10, and the first moving seat 63 assembled outside the second lead screw 62 is installed on the outer wall of the lower semi-circular frame 5 through the connecting frame 10.

[0035] Combined with the attached Figure 4 and Figure 5 , a through hole 51 is opened at a position of one semi-circular frame 5 close to the tooth roller 12, and a semi-circular chute 52 is opened inside the semi-circular frame 5. The through hole 51 is communicated with the chute 52. The cross-sections of the semi-circular slide plate 14 and the chute 52 are respectively in a T-shaped structure. The semi-circular slide plate 14 and a number of teeth 15 are limited to slide in the chute 52. After the two semi-circular slide plates 14 are combined, a number of equally spaced teeth 15 are distributed in a circumferential array centered on the centers of the two semi-circular slide plates 14.

[0036] During use, by sleeving the first adjusting plate 2 and the second adjusting plate 3 on the outer wall of the steel pipe, and then placing the two ends of the steel pipe on the two placing seats 1. By rotating the second operation disk 75, the distance between the first adjusting plate 2 and the second adjusting plate 3 gradually becomes smaller, and the upper and lower groups of clamping rollers 4 move towards the outer wall of the steel pipe until the upper and lower groups of clamping rollers 4 are in contact with the outer wall of the steel pipe. At this time, the central plane between the first adjusting plate 2 and the second adjusting plate 3 is the plane where the axis line of the steel pipe is located. Then, by rotating the first operation disk 68, the first moving seats 63 on the first lead screw 61 and the second lead screw 62 move closer, so that the two symmetrically distributed upper and lower semi-circular frames 5 are combined into a ring, and at this time, the axis of the ring is concentric with the steel pipe. Then, control the motor 13 to operate so that the tooth roller 12 meshes with the teeth 15 to drive the semi-circular slide plate 14 to drive the flaw detection module 11 to move in a circular motion for flaw detection. Then, manually push the handrail 8 so that the entire flaw detection device moves along the steel pipe. At this time, even if the steel pipe is not placed flat as a whole, the axis line of the circular rotation of the flaw detection module 11 always coincides with the axis line of the steel pipe, realizing convenient positioning flaw detection of the steel pipe.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A steel pipe flaw detection device, comprising a flaw detection module (11), characterized in that: It further includes two placing seats (1). A first adjusting plate (2) and a second adjusting plate (3) which are distributed vertically are arranged between the two placing seats (1). Clamping rollers (4) are respectively installed above the first adjusting plate (2) and above the second adjusting plate (3). A clamping and positioning adjusting component (7) is arranged on the side edges of the first adjusting plate (2) and the second adjusting plate (3). The clamping and positioning adjusting component (7) includes a second operation disc (75), and the second operation disc (75) is used for adjusting the distance between the upper and lower clamping rollers (4); Semi-circular frames (5) are respectively arranged below the first adjusting plate (2) and above the second adjusting plate (3). A semi-circular sliding plate (14) is slidably arranged in the semi-circular frame (5). A plurality of teeth (15) are equidistantly arranged on the outer wall of the semi-circular sliding plate (14). The flaw detection module (11) is assembled on the inner side wall of one of the semi-circular sliding plates (14). A motor (13) is installed on the outer wall of one of the semi-circular frames (5). The output shaft of the motor (13) is connected with a toothed roller (12), and the toothed roller (12) meshes with the teeth (15) to drive the semi-circular sliding plate (14) to move in the semi-circular frame (5). Detection and positioning adjusting components (6) are arranged on the side edges of the upper and lower groups of semi-circular frames (5). The detection and positioning adjusting component (6) includes a first operation disc (68), and the first operation disc (68) is used for driving the two semi-circular frames (5) to merge or separate.

2. The steel pipe flaw detection device according to claim 1, characterized in that: The inner diameter of the circular arc formed by merging the upper and lower groups of semi-circular frames (5) is larger than the outer diameter of the steel pipe to be flaw-detected.

3. The steel pipe flaw detection device according to claim 2, characterized in that: The detection and positioning adjusting component (6) further includes a first worm gear sleeve (66) movably installed above the first adjusting plate (2). A first worm (67) which cooperates with the first worm gear sleeve (66) is movably installed above the first adjusting plate (2). The first operation disc (68) is concentrically installed at one end of the first worm (67).

4. The steel pipe flaw detection device according to claim 3, wherein: The first worm gear sleeve (66) is concentrically installed with a first lead screw (61). The first lead screw (61) movably penetrates to the lower part of the first adjusting plate (2). The upper part of the second adjusting plate (3) is movably connected with a second lead screw (62). A slot (65) is formed at the top of the second lead screw (62). A plug post (64) is installed at the bottom of the first lead screw (61). The plug post (64) is axially inserted and matched with the slot (65) to drive the first lead screw (61) and the second lead screw (62) to rotate concentrically. First moving seats (63) are respectively assembled outside the first lead screw (61) and the second lead screw (62). A plurality of groups of limit baffles (9) are respectively installed below the first adjusting plate (2) and above the second adjusting plate (3). The limit baffles (9) are located on both sides of the first moving seat (63). The first lead screws (61) on both sides below the first adjusting plate (2) are connected by a synchronous belt in a transmission manner. The second lead screws (62) on both sides above the second adjusting plate (3) are connected by a synchronous belt in a transmission manner.

5. A steel pipe flaw detection device according to claim 4, characterized in that: The clamping and positioning adjustment assembly (7) further includes support frames (76) installed on both sides below the first adjustment plate (2). A second worm (74) and a second worm gear sleeve (73) that are meshed with each other are movably installed on one side of the support frame (76). A second operation disk (75) is concentrically installed at one end of the second worm (74). The second worm gear sleeve (73) is concentrically connected to a third lead screw (71). A second moving seat (72) is assembled outside the third lead screw (71). The second moving seat (72) is fixedly connected to the second adjustment plate (3).

6. The steel pipe flaw detection device according to claim 5, characterized in that: A handrail (8) is installed on one side of the limit baffle (9). There are two sets of clamping rollers (4) assembled on the first adjustment plate (2) or the second adjustment plate (3), and the two sets are respectively arranged on both sides of the semi-circular arc frame (5).

7. The steel pipe flaw detection device according to claim 6, characterized in that: The cross-section of the plug post (64) is a polygonal structure. The cross-section of the plug slot (65) is a polygonal structure that is used in cooperation with the plug post (64). The first moving seat (63) assembled outside the first lead screw (61) is installed on the outer wall of the upper semi-circular arc frame (5) through a connecting frame (10). The first moving seat (63) assembled outside the second lead screw (62) is installed on the outer wall of the lower semi-circular arc frame (5) through a connecting frame (10).

8. An ultrasonic flaw detection device for steel pipes according to claim 7, characterized in that: A through hole (51) is opened at a position of one of the semi-circular arc frames (5) close to the tooth roller (12). A chute (52) in a semi-circular arc structure is opened inside the semi-circular arc frame (5). The through hole (51) is communicated with the chute (52). The cross-sections of the semi-circular arc slide plate (14) and the chute (52) are respectively in a T-shaped structure. The semi-circular arc slide plate (14) and a number of teeth (15) are limited and slide in the chute (52).

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