A small-diameter pipe phased array circumferential scanning fixture

Abstract

This utility model discloses a small-diameter pipe phased array circumferential scanning fixture in the field of pipeline flaw detection technology. It includes a base with symmetrically arranged support frames on both sides. A sleeve is rotatably inserted into each support frame, and a clamping mechanism is provided on the sleeve. A phased array probe mechanism is located between the two sets of support frames. The moving drive mechanism includes a mounting ring, several sets of hollow seats on the outer wall of the mounting ring, and a threaded sleeve that rotatably passes through the hollow seats and the mounting ring. A threaded rod is threaded into one end of the threaded sleeve facing the center of the mounting ring. One end of the threaded rod is connected to a mounting plate, and the mounting plate is connected to an ultrasonic probe. This utility model allows the threaded sleeve on the rotatable mounting ring to drive the threaded rod, thereby moving the ultrasonic probe radially to adjust the distance between the probe and the pipe wall. This effectively solves the problem of unstable coupling effect of traditional fixed-spacing probes when detecting different pipe diameters, improving detection accuracy and expanding the range of pipe diameters that can be detected.

Description

Technical Field

[0001] This utility model relates to the field of pipeline flaw detection, specifically to a phased array circumferential scanning fixture for small-diameter pipes. Background Technology

[0002] In the field of industrial inspection, non-destructive testing of small-diameter pipes (such as pipes with Φ<50mm) is a key link to ensure the safe operation of equipment, especially in industries such as petroleum, chemical, and nuclear power, where the requirements for defect detection of pipelines are extremely strict.

[0003] Currently, CN218938195U discloses an automatic PAUT scanning device for pipelines using a phased array. Although the aforementioned scanning device can scan and inspect the entire pipeline body, it has the following drawbacks in use:

[0004] The distance between its ultrasonic probe and the outer wall of the pipe to be tested remains fixed and cannot be adjusted according to changes in pipe diameter. This results in unstable acoustic coupling between the probe and the pipe wall when testing different pipe diameters, and also limits the range of pipe diameters that can be tested, thus limiting its use.

[0005] Furthermore, when damage is detected on the outer wall of the pipe, the location of the damage cannot be marked, causing inconvenience for subsequent re-inspection and maintenance. To address this, we propose a phased array circumferential scanning fixture for small-diameter pipes. Utility Model Content

[0006] The purpose of this invention is to provide a phased array circumferential scanning fixture for small-diameter pipes. It solves the problem that existing scanning devices keep the distance between the ultrasonic probe and the outer wall of the pipe to be inspected fixed, and cannot adaptively adjust according to changes in pipe diameter. This results in unstable acoustic coupling between the probe and the pipe wall when inspecting different pipe diameters, and also limits the range of pipe diameters that can be inspected, thus limiting the use of this technology.

[0007] This utility model achieves the above objectives through the following technical solutions:

[0008] A small-diameter pipe phased array circumferential scanning fixture includes a base, with support frames symmetrically arranged on both sides of the base. A sleeve is rotatably inserted into the support frame, and a clamping mechanism for clamping the pipe is provided on the sleeve. One sleeve is driven to rotate by a rotating mechanism. A phased array probe mechanism is provided between the two sets of support frames. The phased array probe mechanism is connected to a moving drive mechanism through a connecting frame. The moving drive mechanism is located on the base and is used to drive the phased array probe mechanism to move along the axis of the clamped pipe.

[0009] The moving drive mechanism includes a mounting ring, several sets of hollow seats on the outer wall of the mounting ring, and a threaded sleeve that rotates through the hollow seats and the mounting ring. A threaded rod is threaded into one end of the threaded sleeve facing the center of the mounting ring. One end of the threaded rod is connected to a mounting plate, and the mounting plate is connected to an ultrasonic probe for detecting the pipeline. The mounting plate is connected to a guide rod, and the guide rod penetrates the outer wall of the mounting ring.

[0010] A further improvement is that an adjusting gear ring is rotatably provided on the outer wall of the mounting ring and on one side of the hollow seat. The adjusting gear ring and the threaded sleeve are connected by a transmission component, which is located on one side of the hollow seat.

[0011] A further improvement is that the clamping mechanism includes adjusting screws symmetrically threaded onto both sides of the sleeve. One end of the adjusting screw is connected to a handwheel, and the other end extends into the sleeve and is rotatably connected to a clamping plate that contacts the outer wall of the pipe. A rod penetrating the sleeve is connected to the side of the clamping plate near the adjusting screw.

[0012] A further improvement is that the rotating mechanism includes a driven gear ring fixedly sleeved on the outer wall of one of the sleeves, a driving gear meshing on one side of the driven gear ring, and the driving gear is located at the output end of the rotating device, and the rotating device is located on a corresponding support frame.

[0013] A further improvement is that the support frame is detachably fixed to the base by bolts, and the base has several sets of mounting holes that mate with the bolts.

[0014] A further improvement is that the phased array probe mechanism also includes a marking mechanism on the mounting ring, which is used to mark the damaged area of ​​the pipe when the ultrasonic probe detects pipe damage.

[0015] A further improvement is that the marking mechanism includes a threaded cylinder threaded onto the mounting ring and offset from the hollow seat, a telescopic device located at one end of the threaded cylinder, a movable column movably disposed inside the threaded cylinder and connected to the output end of the telescopic device, and a connecting rod movably inserted into the end of the movable column away from the telescopic device. The connecting rod and the movable column are connected by a buffer spring, and the end of the connecting rod away from the movable column faces the axis of the mounting ring and is detachably connected to a marking pen via a pen sleeve.

[0016] The beneficial effects of this utility model are as follows:

[0017] This invention uses a phased array probe mechanism to scan and inspect pipelines. Based on the diameter of the pipeline to be inspected, the threaded sleeve on the rotatable mounting ring drives the threaded rod to move the ultrasonic probe radially, thereby adjusting the distance between the probe and the pipe wall. This effectively solves the problem of unstable coupling effect of traditional fixed-spacing probes when inspecting different pipe diameters, ensuring that the probe and the pipe wall maintain the optimal coupling distance, improving detection accuracy, and expanding the range of pipe diameters that can be inspected to meet the needs of scanning and inspecting pipelines of various specifications.

[0018] This invention also includes a marking mechanism on the mounting ring. When the ultrasonic probe detects damage to the pipe, the marking mechanism marks the damaged area of ​​the pipe, facilitating subsequent re-inspection, maintenance, and other work. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the tooling structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the phased array probe mechanism of this utility model;

[0021] Figure 3 This utility model Figure 2 A schematic diagram of a local structure in the image;

[0022] Figure 4 This is a schematic diagram of the marking mechanism structure in this utility model;

[0023] Figure 5 This utility model Figure 4 A schematic diagram of a local structure.

[0024] In the diagram: 1. Base; 2. Support frame; 3. Sleeve; 4. Clamping mechanism; 41. Clamping plate; 42. Adjusting screw; 5. Driven gear ring; 6. Rotating device; 7. Connecting frame; 8. Moving drive mechanism; 9. Phased array probe mechanism; 91. Mounting ring; 92. Hollow seat; 93. Threaded sleeve; 94. Threaded rod; 95. Mounting plate; 96. Ultrasonic probe; 97. Adjusting gear ring; 98. Transmission component; 99. Marking mechanism; 991. Threaded cylinder; 992. Telescopic device; 993. Movable column; 994. Connecting rod; 995. Buffer spring; 996. Pen cap; 997. Marking pen. Detailed Implementation

[0025] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0026] Example 1

[0027] Please see the appendix Figure 1-3 A small-diameter pipe phased array circumferential scanning fixture includes a base 1, with support frames 2 symmetrically arranged on both sides of the base 1. The support frames 2 are detachably fixed to the base 1 by bolts. The base 1 has several sets of mounting holes that cooperate with the bolts. With this arrangement, the spacing between the two sets of support frames 2 can be flexibly adjusted according to the length of the pipe to be inspected.

[0028] A sleeve 3 is rotatably inserted on the support frame 2. A bearing is provided at the connection between the sleeve 3 and the support frame 2. Both ends of the sleeve 3 are hollow. A clamping mechanism 4 for clamping the pipe is provided on the sleeve 3. One sleeve 3 is driven to rotate by a rotating mechanism. A phased array probe mechanism 9 is provided between the two sets of support frames 2. The phased array probe mechanism 9 is connected to a moving drive mechanism 8 through a connecting frame 7. The moving drive mechanism 8 is, for example, an electric guide rail (including a guide rail, a slider, and a drive system, etc.), but is not limited to this type. The moving drive mechanism 8 is located on the base 1 and is used to drive the phased array probe mechanism 9 to move along the axis of the clamped pipe. The rotating mechanism drives the clamped pipe to rotate circumferentially. The moving drive mechanism 8 drives the phased array probe mechanism 9 to move, thereby realizing the scanning and detection of the clamped pipe.

[0029] The moving drive mechanism 8 includes a mounting ring 91, which is coaxial with the sleeve 3. Several sets of hollow seats 92 are located on the outer wall of the mounting ring 91. A threaded sleeve 93 rotatably passes through the hollow seats 92 and the mounting ring 91. A bearing is provided at the connection between the threaded sleeve 93 and the hollow seats 92. A threaded rod 94 is threaded into one end of the threaded sleeve 93 facing the center of the mounting ring 91. One end of the threaded rod 94 is fixedly connected to a mounting plate 95, and the mounting plate 95 is connected to an ultrasonic probe 96 for pipe inspection. The mounting plate 95 and the ultrasonic probe 96 are detachably connected, for example, by screws or clips, for easy disassembly and maintenance. A guide rod is connected to the mounting plate 95, and the guide rod passes through the outer wall of the mounting ring 91. The guide rod restricts the mounting plate 95 so that the threaded rod 94 does not rotate when the threaded sleeve 93 is rotated. The user can rotate the threaded sleeve 93, thereby causing the threaded rod 94 to move the mounting plate 95 and the ultrasonic probe 96, adjusting the position of the detection end of the ultrasonic probe 96 to adapt to the scanning and inspection of pipes of different diameters.

[0030] Preferably, in this embodiment, an adjusting gear ring 97 is rotatably provided on the outer wall of the mounting ring 91 and located on one side of the hollow seat 92. A bearing is provided at the connection between the adjusting gear ring 97 and the mounting ring 91. The adjusting gear ring 97 and the threaded sleeve 93 are connected by a transmission component 98. The transmission component 98 is located on one side of the hollow seat 92. For example, the transmission component 98 includes a rotating rod that is rotatably inserted on one side of the hollow seat 92. One end of the rotating rod is connected to the threaded sleeve 93 by a bevel gear set (two sets of meshing bevel gears), and the other end is connected to the adjusting gear ring 97 by a gear. Of course, the transmission component 98 is not limited to this type. With the above configuration, the user can drive all the threaded sleeves 93 to rotate synchronously in the same direction by manually rotating the adjusting gear ring 97, without the need for the user to adjust them sequentially, reducing the manual burden and improving the efficiency of scanning and inspection work.

[0031] Preferably, the clamping mechanism 4 in this embodiment includes adjusting screws 42 symmetrically threaded on both sides of the sleeve 3. The sleeve 3 has threaded holes that mate with the adjusting screws 42. One end of the adjusting screws 42 is connected to a handwheel, and the other end extends into the sleeve 3 and is rotatably connected to a clamping plate 41 that contacts the outer wall of the pipe through a bearing. The side of the clamping plate 41 closest to the adjusting screws 42 is connected to a rod that penetrates the sleeve 3 to restrict the clamping plate 41 so that it does not rotate with the adjusting screws 42, thereby clamping the pipe. Furthermore, the clamping plate 41 includes a plate body connected to the adjusting screws 42 and the rod body, and an arc-shaped component that is detachably connected to the plate body (e.g., by bolts or buckles). The arc-shaped component has an arc-shaped groove to clamp the pipe. During use, the appropriate arc-shaped component can be replaced according to the pipe diameter to achieve stable clamping of the pipe.

[0032] Preferably, the rotating mechanism of this embodiment includes a driven gear ring 5 fixedly sleeved on the outer wall of one of the sleeves 3. A driving gear is meshed on one side of the driven gear ring 5, and the driving gear is located at the output end of the rotating device 6 (such as a motor and a reducer). The rotating device 6 is located on the corresponding support frame 2. By opening the rotating device 6, the rotating device 6 drives the driving gear, and the driving gear drives the driven gear ring 5, thereby causing the corresponding sleeve 3 to rotate, and thus causing the clamped pipe to rotate.

[0033] Example 2

[0034] Please see the appendix Figure 3-5 Based on Embodiment 1, the phased array probe mechanism 9 of this embodiment also includes a marking mechanism 99 disposed on the mounting ring 91. The marking mechanism 99 is used to mark the pipe damage area when the ultrasonic probe 96 detects pipe damage.

[0035] The ultrasonic probe 96 is connected to an external ultrasonic host and other equipment, and is also connected to an external controller. When the ultrasonic probe 96 detects damage to the pipe, it sends a signal to the external controller. The external controller then controls the marking mechanism 99 to mark the damaged area of ​​the pipe. It should be noted that after the ultrasonic probe 96 detects damage to the pipe and sends a signal to the external controller, the external controller also controls the moving drive mechanism 8 to stop working to ensure the accuracy of the marking position.

[0036] Preferably, the marking mechanism 99 in this embodiment includes a threaded cylinder 991 threadedly inserted into the mounting ring 91 and offset from the hollow seat 92. A threaded hole is provided through the mounting ring 91 to mate with the threaded cylinder 991, allowing for convenient adjustment of the usage position via the threaded cylinder 991 and the threaded hole. A telescopic device 992 (such as an electric telescopic rod) is located at one end of the threaded cylinder 991. A movable column 993 is movably disposed within the threaded cylinder 991 and connected to the output end of the telescopic device 992. A connecting rod 994 is movably inserted into the end of the movable column 993 away from the telescopic device 992. The connecting rod 994 has a T-shaped vertical cross-section. A connecting rod 994 is provided at the end of the movable column 993 away from the telescopic device 992. The T-slot is adapted to 94. One end of the connecting rod 994 is located in the T-slot. The connecting rod 994 and the movable column 993 are connected by a buffer spring 995. The buffer spring 995 is specifically located in the T-slot. One end of the connecting rod 994 is connected to the bottom of the T-slot. The end of the connecting rod 994 away from the movable column 993 faces the axis of the mounting ring 91 and is detachably connected to the marking pen 997 via a pen sleeve 996. The pen sleeve 996 and the marking pen 997 are detachably connected, for example, by magnetic attraction or snap-on method, which facilitates the replacement of the marking pen 997. The marking pen 997 can preferably be an erasable red oil-based marker, which can be wiped off later with alcohol or special cleaning agent without leaving any residue and without affecting the aesthetics of the pipeline.

[0037] When the ultrasonic probe 96 detects damage to the pipe, the external controller controls the telescopic device 992 to move the movable column 993 toward the pipe, and then the marking pen 997 marks the damaged area of ​​the pipe. The buffer spring 995 can prevent the marking pen 997 from making hard contact with the pipe, extend the service life of the marking pen 997, and avoid scratching the pipe wall. After marking, the telescopic device 992 drives the movable column 993 to reset.

[0038] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A circumferential scanning fixture for a small-diameter pipe phased array, comprising a base (1), characterized in that, The base (1) is symmetrically provided with support frames (2) on both sides. A sleeve (3) is rotatably inserted on the support frame (2). A clamping mechanism (4) for clamping the pipe is provided on the sleeve (3). One sleeve (3) is driven to rotate by a rotating mechanism. A phased array probe mechanism (9) is provided between the two sets of support frames (2). The phased array probe mechanism (9) is connected to a moving drive mechanism (8) through a connecting frame (7). The moving drive mechanism (8) is provided on the base (1) to drive the phased array probe mechanism (9) to move along the axis of the clamped pipe. The moving drive mechanism (8) includes a mounting ring (91), several sets of hollow seats (92) disposed on the outer wall of the mounting ring (91), and a threaded sleeve (93) that rotatably passes through the hollow seats (92) and the mounting ring (91). A threaded rod (94) is threadedly inserted at one end of the threaded sleeve (93) facing the center of the mounting ring (91). One end of the threaded rod (94) is connected to a mounting plate (95), and the mounting plate (95) is connected to an ultrasonic probe (96) for detecting the pipeline. A guide rod is connected to the mounting plate (95), and the guide rod passes through the outer wall of the mounting ring (91).

2. The tooling according to claim 1, characterized in that, The mounting ring (91) has an adjustable gear ring (97) rotatably mounted on the outer wall of the mounting ring (91) and located on one side of the hollow seat (92). The adjustable gear ring (97) is connected to the threaded sleeve (93) via a transmission component (98), which is located on one side of the hollow seat (92).

3. The tooling according to claim 1, characterized in that, The clamping mechanism (4) includes adjusting screws (42) that are symmetrically threaded on both sides of the sleeve (3). One end of the adjusting screw (42) is connected to a handwheel, and the other end extends into the sleeve (3) and is rotatably connected to a clamping plate (41) that contacts the outer wall of the pipe. The clamping plate (41) has a rod that penetrates the sleeve (3) on the side near the adjusting screw (42).

4. The tooling according to claim 1, characterized in that, The rotating mechanism includes a driven gear ring (5) fixedly sleeved on the outer wall of one of the sleeves (3). One side of the driven gear ring (5) is meshed with a driving gear, and the driving gear is located at the output end of the rotating device (6). The rotating device (6) is located on the corresponding support frame (2).

5. The tooling according to claim 1, characterized in that, The support frame (2) is detachably fixed to the base (1) by bolts, and the base (1) has a number of mounting holes that cooperate with the bolts.

6. The tooling according to claim 1, characterized in that, The phased array probe mechanism (9) further includes a marking mechanism (99) disposed on the mounting ring (91), the marking mechanism (99) being used to mark the pipe damage area when the ultrasonic probe (96) detects pipe damage.

7. The tooling according to claim 6, characterized in that, The marking mechanism (99) includes a threaded cylinder (991) threaded onto the mounting ring (91) and offset from the hollow seat (92), a telescopic device (992) located at one end of the threaded cylinder (991), a movable column (993) movably located inside the threaded cylinder (991) and connected to the output end of the telescopic device (992), and a connecting rod (994) movably inserted into the end of the movable column (993) away from the telescopic device (992). The connecting rod (994) and the movable column (993) are connected by a buffer spring (995). The end of the connecting rod (994) away from the movable column (993) faces the axis of the mounting ring (91) and is detachably connected to a marking pen (997) via a pen sleeve (996).

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