Nondestructive testing device for pipeline welding seam

Abstract

The utility model provides a nondestructive testing device for a pipeline welding seam, and belongs to the technical field of welding seam detection. Comprising a central rod, the support comprises a fixed seat fixedly connected with the center rod and a sliding rail vertically and fixedly connected to the outer side wall of the fixed seat; a through groove is formed in a frame body of the annular frame, and a nut seat is rotationally connected into the through groove; one end of the movable arm is in matched sliding connection with the sliding rail, the inner side wall of the movable arm is rotatably connected with a ball in a rolling manner, the ball is in matched rolling connection with the outer side wall of the pipeline during detection, the side wall of one end, far away from the sliding rail, of the movable arm is fixedly connected with a screw rod, and the screw rod is in matched sliding connection with the ring frame; and the receiving end is fixedly connected to one end part of the movable arm. The movable arms capable of adjusting the distance between each other are connected with the receiving end, and are matched with the transmitting end connected with the central rod, so that the pipeline welding seam detection device can adapt to welding seam detection of pipelines with different pipe diameters in a certain range.

Description

Technical Field

[0001] The utility model relates to the technical field of weld detection, in particular to a nondestructive detection device for pipeline welds. Background Art

[0002] The seam formed by melting the metal at the joints of the welding rod and the two pipes by utilizing the high temperature of the welding heat source is called a weld. After the weld metal cools down, the two pipes are connected as a whole. Most pipe welds are butt welds, which connect the pipes at both ends into one by welding to continuously extend the pipe. In addition to the requirements for welding technology and welding process, welding quality inspection is also an important part of the quality management of welded structures. Common inspection methods include: 1. Radiographic inspection method; 2. Ultrasonic inspection; 3. Magnetic inspection; 4. Penetrant inspection.

[0003] At present, in conventional pipeline weld inspection, a radiographic flaw detection method is usually applied. For example, a Chinese patent with publication number CN108362718A discloses a detection device for pipeline welds, which synchronously drives the transmitting end and the receiving end of the detection ray through a driving component to ensure the stability of signal reception.

[0004] However, due to the fixed support component setting, the detection device is unable to cope with the detection of pipelines with different diameters. Therefore, the present application provides a non-destructive testing device for pipeline welds to meet the needs. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a nondestructive testing device for pipeline welds to solve the problem that the existing testing equipment cannot cope with pipeline testing of different diameters due to the fixed support component setting.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] A nondestructive testing device for pipeline welds comprises a center rod in a round rod structure, a transmitting end is arranged at one end of the center rod, and the transmitting end is arranged to be located inside the pipeline during testing; a bracket comprises a fixing seat fixedly connected to the center rod, and a slide rail fixedly connected vertically to the outer wall of the fixing seat, a through slot is arranged inside the slide rail, and a threaded rod is rotatably connected inside the slide rail; a ring frame is arranged on a frame body, a nut seat is rotatably connected inside the through slot, and a driving handle is fixedly connected to the outer wall of the ring frame through a connecting rod; a movable arm is slidably connected with the slide rail at one end, and a threaded hole threadedly connected with the threaded rod is arranged on the rod body of the movable arm located inside the slot of the slide rail, a ball is rotatably connected with the inner wall of the movable arm, and the ball is arranged to be rotatably connected with the outer wall of the pipeline during testing, a screw rod is fixedly connected to the side wall of the movable arm away from the slide rail, the screw rod is slidably connected with the ring frame, and the screw rod is threadedly connected with the nut seat; a receiving end is fixedly connected to an end of the movable arm away from the bracket, and is arranged to be opposite to the transmitting end during testing.

[0008] Preferably, a plurality of wire grooves parallel to the axis are provided on the side wall of the center rod.

[0009] Preferably, three slide rails are provided and are distributed in a circular array on the outer side wall of the fixing seat.

[0010] Preferably, the threaded rod passes through the top wall of the slide rail and is fixedly connected with a handle.

[0011] Preferably, a scale is provided on the outer side wall of the slide rail.

[0012] Preferably, three movable arms are provided and are slidably connected with three brackets respectively. Two balls are rollingly connected to each movable arm. The two balls are distributed at a certain interval on the same side wall of the movable arm close to one end of the receiving end.

[0013] Preferably, three through grooves are provided and distributed on the side wall of the ring frame in a rectangular array, and the three through grooves are respectively slidably connected with the screw rods on the three movable arms.

[0014] Preferably, an anti-slip ring is provided on the outer side wall of the nut seat, and the anti-slip ring protrudes from the openings on both sides of the through groove.

[0015] Preferably, a driving handle is fixedly connected to the connecting rod on the outer side wall of the ring frame, and the connecting rod and the screw rod are staggered.

[0016] Compared with the prior art, the utility model has at least the following beneficial effects:

[0017] In the above scheme, the outward expansion distance of the two ends of the movable arm is adjusted respectively by rotating the threaded rod and the nut seat to adapt to the side walls of pipelines with different diameters. During detection, under the rolling cooperation of the ball, the ring frame driving device is rotated as a whole to drive the transmitting end and the receiving end used for detection to rotate and move around the weld on the pipeline to complete the detection. By setting a movable arm with adjustable mutual spacing to connect the receiving end and cooperate with the transmitting end connected to the center rod, it can adapt to the detection of pipeline welds with different diameters within a certain range. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a cross-sectional view of the overall structure and pipeline of the utility model when it is working;

[0021] Figure 3 for Figure 2 A magnified image of area A;

[0022] Figure 4 for Figure 2 Enlarged view of area B;

[0023] Figure 5 This is a schematic diagram of the support structure of the utility model.

[0024] In the figure: 1. center rod; 2. bracket; 21. fixed seat; 22. slide rail; 23. threaded rod; 24. rotary handle; 3. movable arm; 31. ball bearing; 4. ring frame; 41. through groove; 42. nut seat; 43. anti-slip ring; 5. driving handle; 6. transmitting end; 7. receiving end; 8. screw rod.

[0025] As shown in the figure, in order to clearly implement the structure of the embodiment of the utility model, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the utility model to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0026] The following is a detailed description of a nondestructive testing device for pipeline welds provided by the utility model in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art may also adopt other alternative methods to implement them; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the utility model.

[0027] like Figure 1 - Figure 5 As shown, the embodiment of the utility model provides a non-destructive testing device for pipeline welds, including a center rod 1, which is a round rod structure, a transmitting end 6 is provided at one end of the center rod 1, and the transmitting end 6 is arranged to be located inside the pipeline during detection, and a counterweight block is provided at the other end of the center rod 1 to balance the weight of the transmitting end 6 (refer to Figure 1 ); the bracket 2 comprises a fixed seat 21 fixedly connected to the center rod 1, and a slide rail 22 vertically fixedly connected to the outer wall of the fixed seat 21, the slide rail 22 has a through slot inside, and a threaded rod 23 is rotatably connected inside; the ring frame 4 has a through slot 41 on the frame body, a nut seat 42 is rotatably connected inside the through slot 41, and the outer wall of the ring frame 4 is fixedly connected to a driving handle 5 through a connecting rod; the movable arm 3 has one end slidably connected to the slide rail 22, and the movable arm 3 is located in the slot of the slide rail 22 A threaded hole is provided on the rod body of the part for threaded connection with the threaded rod 23, a ball 31 is rotatably and rollingly connected on the inner wall of the movable arm 3, and the ball 31 is set to be rollingly connected with the outer wall of the pipeline during detection, a screw rod 8 is fixedly connected to the side wall of the movable arm 3 away from the slide rail 22, the screw rod 8 is slidably connected with the ring frame 4, and the screw rod 8 is threadedly connected with the nut seat 42; the receiving end 7 is fixedly connected to the end of the movable arm 3 away from the bracket 2, and is set to be opposite to the transmitting end 6 during detection.

[0028] By rotating the threaded rod 23 and the nut seat 42, the outward expansion distances of the two ends of the movable arm 3 are adjusted respectively to adapt to the side walls of pipelines with different diameters. During detection, the rolling cooperation of the ball 31 is used to rotate the ring frame 4 to drive the device to rotate as a whole, thereby driving the transmitting end 6 and the receiving end 7 used for detection to rotate and move around the weld on the pipeline to complete the detection. It can adapt to the detection of pipeline welds with different diameters within a certain range.

[0029] like Figure 1 As shown, a plurality of wire grooves parallel to the axis are provided on the side wall of the center rod 1 .

[0030] This arrangement ensures the structural stability of the connection between the bracket 2 and the center rod 1, and avoids relative rotation between the bracket 2 and the center rod 1 driven by the movable arm 3 when the ring frame 4 is rotated, resulting in relative displacement between the relative transmitting end 6 and the receiving end 7, thereby affecting the detection result.

[0031] like Figure 5 As shown, three slide rails 22 are provided and distributed in a circular array on the outer wall of the fixed seat 21 , and colinearly distributed rotating seats are provided at the position inside the slide rail 22 close to the fixed seat 21 and outside the top wall of the slide rail 22 away from the fixed seat 21 for rotating the connecting threaded rod 23 .

[0032] like Figure 4 As shown, the threaded rod 23 passes through the top wall of the slide rail 22 and is fixedly connected with a handle 24, which is convenient for manual operation to rotate the threaded rod 23 and facilitate adjustment.

[0033] like Figure 1 and Figure 5 As shown, the outer wall of the slide rail 22 is provided with scale marks, and at the same time, the rod body of the screw rod 8 is also provided with scale marks.

[0034] With this arrangement, when adjusting the positions of the two ends of the movable arm 3, the two sets of scale marks are matched and compared to ensure that the movable arm 3 remains parallel to the center rod 1 after the adjustment is completed, and the three sets of scale marks are compared to make the center rod 1 pass through the central axis of the ring frame 4, thereby making the relative spacing between each set of transmitting ends 6 and receiving ends 7 the same.

[0035] like Figure 1 As shown, there are three movable arms 3, which are slidably connected with three brackets 2 respectively. Two balls 31 are rollingly connected to each movable arm 3. The two balls 31 are distributed at a certain interval on the same side wall of the movable arm 3 near one end of the receiving end 7.

[0036] With this arrangement, when in use, the movable arm 3 is supported by the two balls 31 , so that when the device as a whole is rotated, the movable arm 3 always remains parallel to the outer wall of the pipe.

[0037] like Figure 1 As shown, three through slots 41 are provided and distributed on the side wall of the ring frame 4 in a rectangular array. The three through slots 41 are respectively slidably connected with the screw rods 8 on the three movable arms 3 .

[0038] like Figure 2 As shown, an anti-slip ring 43 is provided on the outer side wall of the nut seat 42 , and the anti-slip ring 43 protrudes from the openings on both sides of the through slot 41 .

[0039] This arrangement facilitates manual operation of rotating the nut seat 42 .

[0040] like Figure 2 As shown, a driving handle 5 is fixedly connected to the outer wall of the ring frame 4 through a connecting rod, and the connecting rod and the screw rod 8 are staggered, so as to facilitate manual operation to rotate the ring frame 4.

[0041] The technical solution provided by the utility model is that when testing the pipeline weld, firstly, the outward expansion distance of the movable arm 3 is adjusted according to the diameter of the outer wall of the pipeline to be tested. When adjusting, the threaded rod 23 is rotated by holding the rotary handle 24, and the nut seat 42 is driven to rotate by hand-operating the anti-skid ring 43. According to the scale marks on the outer wall of the screw rod 8 and the slide rail 22, it is ensured that the center rod 1 is located on the central axis of the ring frame 4. After the adjustment is completed, the device is sleeved on the outer wall of the pipeline with the end provided with the ring frame 4 as the head. At this time, the transmitting end 6 is located inside the pipeline, and the receiving end 7 and the ring frame 4 are located outside the pipeline. As the device is advanced, until the receiving end 7 is located outside the weld position on the pipeline, the detection component (i.e., the transmitting end 6 and the receiving end 7) is finally opened, and the device is rotated by holding the driving handle 5 at the same time, so that it rotates around the side wall of the pipeline for one circle to complete the detection.

[0042] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A nondestructive testing device for pipeline welds, characterized in that: include: The central rod (1) is in the form of a round rod structure. A transmitting end (6) is provided at one end of the central rod (1). The transmitting end (6) is arranged to be located inside the pipeline during detection. The bracket (2) comprises a fixing seat (21) fixedly connected to the central rod (1), and a slide rail (22) vertically fixedly connected to the outer wall of the fixing seat (21), wherein a through slot is provided inside the slide rail (22) and a threaded rod (23) is rotatably connected inside the slide rail (22); A ring frame (4), wherein a through slot (41) is provided on the frame body, a nut seat (42) is rotatably connected inside the through slot (41), and a driving handle (5) is fixedly connected to the outer wall of the ring frame (4) via a connecting rod; A movable arm (3), one end of which is slidably connected with the slide rail (22), and a threaded hole is provided on the rod body of the movable arm (3) located inside the groove of the slide rail (22) to be threadedly connected with the threaded rod (23). A ball (31) is rotatably connected with the inner wall of the movable arm (3), and the ball (31) is configured to be rollingly connected with the outer wall of the pipeline during detection. A screw rod (8) is fixedly connected to the side wall of the movable arm (3) away from the slide rail (22), and the screw rod (8) is slidably connected with the ring frame (4), and the screw rod (8) is threadedly connected with the nut seat (42); The receiving end (7) is fixedly connected to an end of the movable arm (3) away from the bracket (2), and is arranged to be opposite to the transmitting end (6) during detection.

2. The nondestructive testing device for pipeline welds according to claim 1, characterized in that: The side wall of the central rod (1) is provided with a plurality of wire grooves which are distributed parallel to the axis.

3. The nondestructive testing device for pipeline welds according to claim 1, characterized in that: The slide rails (22) are provided with three and are distributed in a circular array on the outer side wall of the fixing seat (21).

4. The nondestructive testing device for pipeline welds according to claim 1, characterized in that: The threaded rod (23) passes through the top wall of the slide rail (22) and is fixedly connected to a rotary handle (24).

5. The nondestructive testing device for pipeline welds according to claim 1, characterized in that: A scale is provided on the outer side wall of the slide rail (22).

6. The nondestructive testing device for pipeline welds according to claim 1, characterized in that: The movable arms (3) are provided with three and are respectively slidably connected with the three brackets (2). Two balls (31) are rollingly connected to each movable arm (3). The two balls (31) are distributed at a certain interval on the same side wall of the movable arm (3) near one end of the receiving end (7).

7. The nondestructive testing device for pipeline welds according to claim 1, characterized in that: The through grooves (41) are provided with three and are distributed in a rectangular array on the side wall of the ring frame (4). The three through grooves (41) are respectively slidably connected with the screw rods (8) on the three movable arms (3).

8. The nondestructive testing device for pipeline welds according to claim 1, characterized in that: An anti-slip ring (43) is provided on the outer side wall of the nut seat (42), and the anti-slip ring (43) protrudes from the openings on both sides of the through slot (41).

9. The nondestructive testing device for pipeline welds according to claim 1, characterized in that: A driving handle (5) is fixedly connected to a connecting rod on the outer side wall of the ring frame (4), and the connecting rod and the screw rod (8) are arranged in a staggered manner.

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