Pipeline girth weld DR digital radiographic inspection frame

Abstract

The utility model discloses a pipeline annular weld DR digital ray detection frame, including for embracing the first half ring cover and second half ring cover of pipeline circumference, first half ring cover and second half ring cover relative telescopic connection, the radial array of first half ring cover has the first support rod for stopping the pipeline circumference, and the first support rod slidingly nests on the first half ring cover, and the radial array of second half ring cover has the second support rod for stopping the pipeline circumference, and the second support rod slidingly nests on the second half ring cover, and the radial sliding nest of second half ring cover has the slide bar, and the one end of slide bar extension into the inner chamber of second half ring cover is provided for detecting the DR detection instrument of weld, the utility model discloses a telescopic connection structure of first half ring cover and second half ring cover has realized the flexible adjustment of detection frame inner diameter to adapt to the pipeline of different outer diameter size, has solved the limitation that only can be used for single pipeline detection of existing detection equipment, has widened the versatility and application scope of equipment.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline weld inspection technology, specifically relating to a DR digital radiographic inspection frame for pipeline annular welds. Background Technology

[0002] CN120684670A discloses a device for inspecting circumferential welds in pipelines. A ring-shaped guide rail is fitted around the outer circumference of the pipeline, and a radiographic imaging mechanism is slidably connected to the ring-shaped guide rail on the outer wall of the pipeline. The ring-shaped guide rail is fixed to the outer wall of the pipeline, and the radiographic imaging mechanism moves around the ring-shaped guide rail to perform circumferential inspection of the pipeline weld. However, because the inner diameter of the ring-shaped guide rail is a fixed size customized according to the outer diameter of the pipeline, it can only be used to inspect welds on pipelines of fixed sizes, resulting in poor versatility. Utility Model Content

[0003] To address the aforementioned technical problems, the present invention aims to provide a DR digital radiographic inspection frame for pipe annular welds. This frame utilizes a telescopic structure that encircles the pipe and the DR detector, allowing the DR detector to rotate around the pipe's outer circumference to inspect the weld. Because the telescopic structure allows for adjustment of the frame's inner diameter, it is suitable for inspecting pipe annular welds with different outer diameters.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A DR digital radiographic inspection frame for circumferential welds of pipelines includes a first semi-ring and a second semi-ring for encircling the outer circumference of the pipeline. The first and second semi-rings are telescopically connected. The first semi-ring has a radial array of first support rods for stopping the outer circumference of the pipeline, and the first support rods are slidably nested on the first semi-ring. The second semi-ring has a radial array of second support rods for stopping the outer circumference of the pipeline, and the second support rods are slidably nested on the second semi-ring. The second semi-ring has a radially slidably nested sliding rod, and a DR detector for inspecting the weld is disposed at one end of the sliding rod extending into the inner cavity of the second semi-ring.

[0006] Furthermore, a connecting rod is provided on both sides of one end of the first semi-ring, and a connecting hole matching the connecting rod is provided on both sides of one end of the second semi-ring, wherein the connecting hole slidably nests the connecting rod.

[0007] Furthermore, pulleys are provided at one end of the first support rod extending into the inner cavity of the first semi-ring and at one end of the second support rod extending into the inner cavity of the second semi-ring.

[0008] Furthermore, the radial array of the first semi-ring has a first through hole, and a first fixed sleeve communicating with the first through hole is provided radially on the outer periphery. The first support rod is slidably nested in the first fixed sleeve and the first through hole. The radial array of the second semi-ring has a second through hole, and a second fixed sleeve communicating with the second through hole is provided radially on the outer periphery. The second support rod is slidably nested in the second fixed sleeve and the second through hole. The radial array of the second semi-ring also has a third through hole, and a third fixed sleeve communicating with the third through hole is provided radially on the outer periphery. The slide rod is slidably nested in the third fixed sleeve and the third through hole.

[0009] Furthermore, the outer periphery of the second semi-ring is provided with a first fastener for securing the connecting rod, and the first fastener is screwed into the radial direction of each connecting hole.

[0010] Furthermore, the first fixing sleeve, the second fixing sleeve, and the third fixing sleeve are all radially screwed with second fasteners.

[0011] Furthermore, one end of the slide rod extending into the inner cavity of the second semi-ring is provided with a circumferential sleeve for fixing the DR detector.

[0012] Furthermore, the first support rod has at least two columns arranged radially along the first semi-ring, with at least one rod in each column axially; the second support rod has at least two columns arranged radially along the second semi-ring, with at least one rod in each column axially; and the slide rod has one column arranged radially along the inner circumference of the second semi-ring, with at least one slide rod in each column axially.

[0013] By adopting the above technical solution, this utility model has the following advantages and effects:

[0014] This utility model discloses a DR digital radiographic inspection frame for pipe annular welds. Through a telescopic connection structure between the first and second semi-ring sleeves, the inner diameter of the inspection frame can be flexibly adjusted. Furthermore, the first and second support rods stop the outer circumference of the pipe, and rotating the first and second semi-ring sleeves drives the DR detector to rotate and inspect the weld. Because the first and second semi-ring sleeves can telescopically extend and retract, they can adapt to pipes with different outer diameters, overcoming the limitation of existing inspection equipment that can only be used for single-pipe inspection, thus broadening the equipment's versatility and application range. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the isometric structure of this utility model.

[0016] Figure 2 for Figure 1 Side view.

[0017] Figure 3 for Figure 1 A schematic diagram of the explosion structure.

[0018] Figure 4 This is a schematic diagram of the isometric structure of the first half-ring of this utility model.

[0019] Figure 5 for Figure 4 A side view diagram.

[0020] Figure 6 Schematic diagram of the isometric structure of the second half-ring of this utility model Figure 1 .

[0021] Figure 7 Schematic diagram of the isometric structure of the second half-ring of this utility model Figure 2 .

[0022] Figure 8 This is an isometric structural diagram of the slide bar and annular sleeve of this utility model.

[0023] The attached figures are labeled as follows: 1-First semi-ring sleeve, 11-First fixed sleeve, 111-First slot, 12-Connecting rod, 13-First through hole, 2-First support rod, 21-Pulley, 3-Pipe, 4-DR detector, 5-Slide rod, 51-Ring sleeve, 6-Second semi-ring sleeve, 61-Second fixed sleeve, 611-Second slot, 62-Connecting hole, 63-Third fixed sleeve, 631-Third slot, 64-Third through hole, 65-Second through hole, 7-Second support rod. Detailed Implementation

[0024] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to better understand the purpose, features and advantages of this utility model. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of this utility model, but are only for illustrating the essential spirit of the technical solution of this utility model.

[0025] like Figures 1-3 As shown. This utility model discloses a DR digital radiographic inspection frame for a pipe circumferential weld, comprising a first semi-ring 1 and a second semi-ring 6 for encircling the outer circumference of a pipe 3. The first semi-ring 1 and the second semi-ring 6 are connected in a telescopic manner to form a ring structure. The first semi-ring 1 has radially arranged first support rods 2 for stopping the outer circumference of the pipe 3, which are slidably nested in the radial direction of the first semi-ring 1. The second semi-ring 6 has radially arranged second support rods 7 for stopping the outer circumference of the pipe 3, which are slidably nested in the radial direction of the second semi-ring 6. Simultaneously, a sliding rod 5 is slidably nested in the radial direction of the second semi-ring 6. One end of the sliding rod 5 extending into the inner cavity of the second semi-ring 6 is equipped with a DR detector 4 for inspecting the weld. The second support rods 7 are located on both sides of the sliding rod 5. After the first semi-ring 1 and the second semi-ring 6 encircle the pipe 3, they drive the DR detector 4 to rotate around the outer circumference of the pipe 3 to inspect the circumferential weld.

[0026] like Figures 4-7 As shown. Specifically, the first semi-ring 1 has a C-shaped structure, and its inner cavity is a semi-circular cavity. The first support rod 2 is arranged along the semi-circular cavity. The second semi-ring 6 has a U-shaped structure, and its inner cavity is composed of a semi-circular cavity and a rectangular cavity connected together. The front end of the inner cavity is a semi-circular cavity, and the rear end of the inner cavity is a rectangular cavity. The second support rod 7 is arranged along the front semi-circular cavity. The slide rod 5 is set on the second semi-ring 6 on one side of the rectangular cavity. One end of the slide rod 5 extends into the rectangular cavity, which can be used to accommodate the DR detector 4. The slide rod 5 drives the DR detector 4 to move within the inner cavity of the second semi-ring. When the first semi-ring 1 and the second semi-ring 6 are engaged, the semi-circular cavities of the first and second semi-rings engage to encircle the pipe 3. The first semi-ring 1 and the second semi-ring 6 are fixed to the outer circumference of the pipe 3 by the first support rod 2 and the second support rod 7. At this time, the DR detector 4 is radially opposite to the weld seam on the outer circumference of the pipe 3. By rotating the first semi-ring 1 and the second semi-ring 6, the DR detector 4 is rotated around the pipe 3.

[0027] To accommodate pipes 3 with different outer diameters, the first semi-ring 1 and the second semi-ring 6 can be stretched apart to create a certain gap, increasing the space enclosed by the pair of semi-circular cavities. The DR detector 4 can be moved to a suitable distance from the outer periphery of the pipe 3 via the slide rod 5 to inspect the weld. The distance between the DR detector 4 and the outer periphery of the pipe 3 can be radially adjusted via the slide rod 5, ensuring that the DR detector 4 is always in the optimal inspection position.

[0028] Furthermore, in order to facilitate the telescopic adjustment of the first half-ring 1 and the second half-ring 6, a connecting rod 12 is provided on both sides of one end of the first half-ring 1, and a connecting hole 62 matching the connecting rod 12 is provided on both sides of one end of the second half-ring 6, with the connecting hole 62 slidably nesting the connecting rod 12.

[0029] Specifically, in this utility model, one end of the first semi-ring sleeve 1 is provided with three sets of parallel connecting rods 12, and the end of the second semi-ring sleeve 6 opposite to the first semi-ring sleeve 1 is provided with three sets of parallel connecting holes 62. The connecting rods 12 are inserted into the corresponding connecting holes 62 to realize the telescopic connection between the first semi-ring sleeve 1 and the second semi-ring sleeve 6.

[0030] As a preferred embodiment, the connecting rod 12 can be disposed on both sides of one end of the second half-ring 6, and the connecting hole 62 can be disposed on both sides of one end of the first half-ring 1.

[0031] Furthermore, to facilitate the rotation of the second semi-ring 6 and the first semi-ring 1 around the outer circumference of the pipe 3, pulleys 21 are provided at one end of the first support rod 2 extending into the inner cavity of the first semi-ring 1 and at one end of the second support rod 7 extending into the inner cavity of the second semi-ring 6. The axis of the pulley 21 is parallel to the axis of the pipe 3, so that the outer circumference of the pulley 21 can slide in contact with the outer circumference of the pipe 3. The contact between the pulley 21 and the pipe 3 reduces friction, making the rotation of the detection frame along the pipe 3 more stable and smooth, ensuring the stability of the DR detector 4 during the detection process, and improving the accuracy and reliability of the detection data.

[0032] Meanwhile, U-grooves are provided at the ends of the first support rod 2 and the second support rod 7, and the pulley 21 is slidably connected in the U-grooves by a pin, with the outer periphery of the pulley 21 extending out of the end of the U-grooves.

[0033] Furthermore, the first semi-ring sleeve 1 has a first through hole 13 arranged radially, and a first fixed sleeve 11 communicating with the first through hole 13 is arranged radially on its outer periphery. The first support rod 2 is slidably nested in the first fixed sleeve 11 and the first through hole 13. The second semi-ring sleeve 6 has a second through hole 65 arranged radially, and a second fixed sleeve 61 communicating with the second through hole 65 is arranged radially on its outer periphery. The second support rod 7 is slidably nested in the second fixed sleeve 61 and the second through hole 65. The second semi-ring sleeve 6 also has a third through hole 64 arranged radially, and a third fixed sleeve 63 communicating with the third through hole 64 is arranged radially on its outer periphery. The slide rod 5 is slidably nested in the third fixed sleeve 63 and the third through hole 64.

[0034] Specifically, the inner circumference of the first fixing sleeve 11 and the first through hole 13 is provided with a first groove 111, and the outer circumference of the first support rod 2 is provided with a first flange that matches the first groove 111. The first flange is embedded in the first groove 111 and limits the radial direction of the first support rod 2, so that the pulley direction at the end of the first support rod 2 is consistent. The inner circumference of the second fixing sleeve 61 and the second through hole 65 is provided with a second groove 611, and the outer circumference of the second support rod 7 is provided with a second flange. The second flange is embedded in the second groove 611 and limits the radial direction of the second support rod 7, so that the pulley axis direction at the end of the second support rod 7 is consistent. The inner circumference of the third fixing sleeve 63 and the third through hole 64 is provided with a third groove 631, and the outer circumference of the slide rod 5 is provided with a third flange. The third flange is embedded in the third groove 611 and limits the radial direction of the slide rod 5, so that the axis direction of the DR detector 4 at the end of the slide rod 5 is consistent.

[0035] To further secure the first semi-ring 1 and the second semi-ring 6, the outer circumference of the second semi-ring 6 is provided with a first fastener for fastening the connecting rod 12, and the first fastener is screwed into the radial direction of each connecting hole 62. After the extension / retraction distance of the first semi-ring 1 and the second semi-ring 6 is adjusted appropriately, the corresponding connecting rod 12 is fastened by the first fastener on each connecting hole 62. The first fastener is preferably a bolt, with a threaded hole provided radially in the connecting hole 62, and the bolt is screwed into the corresponding threaded hole.

[0036] To further secure the positions of the first support rod 2 within the first fixing sleeve 11, the second support rod 7 within the second fixing sleeve 61, and the slide rod 5 within the third fixing sleeve 63, second fasteners are screwed into the radial directions of the first fixing sleeve 11, the second fixing sleeve 61, and the third fixing sleeve 63. The second fasteners are preferably bolts, and each of the first fixing sleeve 11, the second fixing sleeve 61, and the third fixing sleeve 63 has a screw hole in its radial direction. The bolt is screwed into the corresponding screw hole to secure the positions of the first support rod 2, the second support rod 7, and the slide rod 5.

[0037] like Figure 8 As shown. Since the DR detector 4 is a cylinder, one end of the slide rod 5 extending into the inner cavity of the second semi-ring sleeve 6 is provided with an annular sleeve 51 for fixing the DR detector 4. The inner diameter of the annular sleeve 51 matches the outer diameter of the DR detector 4, and screws can be installed on the annular sleeve 51 to fasten the DR detector 4.

[0038] As a preferred option, the annular sleeve 51 can also be made of metal clamps.

[0039] Furthermore, to facilitate the secure fitting of the first semi-ring 1 and the second semi-ring 6 onto the outer circumference of the pipe 3, the first support rod 2 is arranged in at least two rows radially along the first semi-ring 1, with at least one rod in each row axially. Similarly, the second support rod 7 is arranged in at least two rows radially along the second semi-ring 6, with at least one rod in each row axially. To facilitate the secure fixing of the DR detector 4 onto the outer circumference of the pipe 3, the slide rod 5 is arranged in one row radially along the inner circumference of the second semi-ring 6, with at least one slide rod in each row axially.

[0040] In this invention, the first semi-ring 1 has a radial array of three rows of first support rods, with two rods arranged axially in each row. The second semi-ring 6 has a radial array of two rows of second support rods, with two rods arranged axially in each row. The second semi-ring 6 also has a radial array of one row of sliding rods 5, with two sliding rods arranged axially in each row. Each row of sliding rods 5 is located radially between the two rows of second support rods.

[0041] In use, the DR detector 4 is first fixed inside the cavity of the second half-ring 6. Then, the first half-ring 1 and the second half-ring 6 are placed around the outer circumference of the pipe 3 and the appropriate distance between them and the pipe 3 is adjusted. The outer circumference of the pipe 3 is stopped by extending and retracting the first support rod 2 and the second support rod 7. After adjusting the slide rod 5 to maintain a suitable distance between the DR detector 4 and the outer circumference of the pipe 3, the first half-ring 1 and the second half-ring 6 are rotated to make the DR detector 4 rotate around the weld seam on the outer circumference of the pipe 3 to perform circumferential inspection of the weld seam.

Claims

1. A DR digital radiographic inspection frame for circumferential welds of pipelines, characterized in that, It includes a first semi-ring (1) and a second semi-ring (6) for encircling the outer periphery of the pipe (3). The first semi-ring (1) and the second semi-ring (6) are connected in a telescopic manner. The first semi-ring (1) has a radial array of first support rods (2) for stopping the outer periphery of the pipe (3). The first support rods (2) are slidably nested on the first semi-ring (1). The second semi-ring (6) has a radial array of second support rods (7) for stopping the outer periphery of the pipe (3). The second support rods (7) are slidably nested on the second semi-ring (6). The second semi-ring (6) has a radially slidably nested sliding rod (5). One end of the sliding rod (5) extending into the inner cavity of the second semi-ring (6) is provided with a DR detector (4) for detecting weld seams.

2. The DR digital radiographic inspection frame for pipe annular welds according to claim 1, characterized in that, The first semi-ring sleeve (1) has connecting rods (12) on both sides of one end, and the second semi-ring sleeve (6) has connecting holes (62) on both sides of one end that match the connecting rods (12). The connecting holes (62) are slidably nested in the connecting rods (12).

3. The DR digital radiographic inspection frame for pipe circumferential welds according to claim 2, characterized in that, Both the end of the first support rod (2) extending into the inner cavity of the first semi-ring (1) and the end of the second support rod (7) extending into the inner cavity of the second semi-ring (6) are provided with pulleys.

4. The DR digital radiographic inspection frame for pipe annular welds according to claim 3, characterized in that, The first semi-ring sleeve (1) has a first through hole (13) in its radial array, and a first fixed sleeve (11) communicating with the first through hole (13) is provided in the outer radial direction. The first support rod (2) is slidably nested in the first fixed sleeve (11) and the first through hole (13). The second semi-ring sleeve (6) has a second through hole (65) in its radial array, and a second fixed sleeve (61) communicating with the second through hole (65) is provided in the outer radial direction. The second support rod (7) is slidably nested in the second fixed sleeve (61) and the second through hole (65). The second semi-ring sleeve (6) also has a third through hole (64) in its radial direction, and a third fixed sleeve (63) communicating with the third through hole (64) is provided in the outer radial direction. The slide rod (5) is slidably nested in the third fixed sleeve (63) and the third through hole (64).

5. The DR digital radiographic inspection frame for pipe annular welds according to claim 4, characterized in that, The second semi-ring sleeve (6) is provided with a first fastener for fastening the connecting rod (12) on its outer periphery, and the first fastener is screwed into each of the connecting holes (62) radially.

6. The DR digital radiographic inspection frame for pipe circumferential welds according to claim 5, characterized in that, The first fixing sleeve (11), the second fixing sleeve (61) and the third fixing sleeve (63) are all radially screwed with second fasteners.

7. The DR digital radiographic inspection frame for pipe circumferential welds according to claim 1, characterized in that, The end of the slide rod (5) that extends into the inner cavity of the second semi-ring sleeve (6) is provided with an annular sleeve (51) for fixing the DR detector (4).

8. A DR digital radiographic inspection frame for pipe circumferential welds according to claim 6, characterized in that, The first support rod (2) has at least two columns arranged radially along the first semi-ring (1), with at least one in each column. The second support rod (7) has at least two columns arranged radially along the second semi-ring (6), with at least one in each column. The slide rod (5) has one column arranged radially along the inner circumference of the second semi-ring (6), with at least one in each column.

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