Boiler oxide skin detection device

Abstract

The invention relates to the field of detection devices, in particular to a boiler oxide skin detection device. The device comprises a walking mechanism, a cross coupling and a detection mechanism. The two sets of walking mechanisms are oppositely distributed, each walking mechanism comprises a moving cylinder, multiple sets of folding and unfolding assemblies evenly distributed around the moving cylinder and a driving assembly for driving the moving cylinder to linearly move, and each folding and unfolding assembly comprises a roller at the outer end and a power motor for driving the roller to rotate; the cross coupling is connected between the two groups of walking mechanisms; the detection mechanism comprises a ray detection head located on the peripheral side of the walking mechanism and a rotating assembly for driving the ray detection head to rotate in the circumferential direction, and when the walking mechanism walks, the moving path of the ray detection head is spiral. The device can be suitable for movable detection in a straight pipe and a bent pipe, only one ray detection head is installed, and the interior of a pipeline is fully detected in a spiral motion mode of the ray detection head.

Description

Technical Field

[0001] This invention relates to the field of detection devices, and in particular to a boiler scale detection device. Background Technology

[0002] After prolonged use, the metal surface of a boiler superheater oxidizes in the high-temperature steam. Due to hydrogen pressure, the oxidized metal causes scale to flake off. When the scale reaches a certain thickness, it can lead to localized overheating of the boiler, or even overheating and tube rupture. Therefore, to prevent this, it is necessary to use a detection device to inspect it. A commonly used method is radiographic testing, and the results are used to determine the extent of scale buildup in the boiler superheater pipes.

[0003] Chinese Patent Publication No. CN219828161U discloses a boiler superheater oxide scale detection device, including a shell. A detection ring is fixedly installed on the outer surface of the shell at its middle position. Multiple detection probes are equidistantly installed on the outer surface of the detection ring. Two sets of mounting seats are symmetrically fixed at both ends of the shell, with three probes per set. A sleeve is fixedly installed on the upper surface of each mounting seat. In use, the rollers press against the pipe wall, causing the rollers to rotate and drive a support rod to rotate. The support rod, through a hinged connecting rod, drives a slider to slide, compressing a spring. The spring ensures that the rollers remain in contact with the pipe wall, guaranteeing the stability of the device and preventing slippage. The output of a drive motor drives the rollers to rotate, causing them to move the device along the pipe. The detection probes allow for multi-directional detection of the pipe interior, improving the comprehensiveness of the inspection.

[0004] However, the above technical solution has the following drawbacks: it can only move in straight pipes and not in bends, resulting in a limited range of applications. Furthermore, it requires the installation of multiple detection probes, leading to high costs. Summary of the Invention

[0005] The purpose of this invention is to address the problems existing in the background art by proposing a boiler scale detection device that is suitable for mobile detection in straight and curved pipes, and only requires the installation of one X-ray inspection head. The X-ray inspection head moves in a spiral motion to fully inspect the inside of the pipe.

[0006] The technical solution of the present invention is a boiler scale detection device, comprising a traveling mechanism, a cross coupling, and a detection mechanism; the traveling mechanism comprises two sets of relatively distributed traveling mechanisms, each including a moving cylinder, multiple sets of retracting and extending components evenly distributed around the moving cylinder, and a driving component for driving the moving cylinder to move linearly, the retracting and extending components including rollers at the outer end and a power motor for driving the rollers to rotate; the cross coupling connects the two sets of traveling mechanisms; the detection mechanism includes a X-ray detection head located on the outer periphery of one set of traveling mechanisms and a rotating component for driving the X-ray detection head to rotate circumferentially, the X-ray detection head moving along a spiral path when the traveling mechanism travels.

[0007] Preferably, the drive assembly includes a mounting cover, a mounting platform at one end of the mounting cover, a lead screw rotatably mounted on the mounting platform, a lead screw nut threadedly connected to the lead screw and mounted on a movable cylinder, and a motor mounted inside the mounting cover and driving the lead screw to rotate.

[0008] Preferably, the outer end of the movable cylinder is provided with a second mounting platform. The retracting assembly includes a hinge seat provided on the first mounting platform, a retracting rod with one end hinged to the hinge seat, a connecting rod with both ends hinged to the retracting rod and the second mounting platform respectively, and a wheel frame provided on the outer end of the retracting rod. The roller is rotatably mounted on the wheel frame, and the power motor is mounted on the wheel frame.

[0009] Preferably, the outer end of the movable cylinder has an opening, and a filter screen is installed at the opening.

[0010] Preferably, the mounting cover has a flange portion one at one end, and the cross coupling has a flange portion two at the outer end. The flange portion one and the flange portion two are connected by bolts and nuts.

[0011] Preferably, the rotating assembly includes a mounting assembly, a bracket and a rotating seat mounted on the mounting cover, a rotating shaft rotatably mounted on the bracket, a gear coaxially mounted on the rotating shaft, a gear ring rotatably mounted on the rotating seat and meshing with the gear, and a power assembly for driving the rotating shaft to rotate. One end of the mounting assembly is mounted on the side of the gear ring, and the X-ray inspection head is mounted on the other end of the mounting assembly.

[0012] Preferably, the mounting assembly includes a mounting plate, a slide cylinder, a guide rod, and a threaded knob. The X-ray inspection head is mounted on the mounting plate, which is located at the outer end of the slide cylinder. The slide cylinder is slidably mounted on the guide rod, which is located on the side of the gear ring. The threaded knob is threadedly connected to the slide cylinder and abuts against the guide rod.

[0013] Preferably, the side of the roller is provided with a groove, and a magnetic adsorption unit is embedded in the groove.

[0014] Compared with existing technologies, the present invention has the following beneficial technical effects: The present invention is applicable to mobile inspection in straight and curved pipes, offering flexibility and a wide range of applications. Only one X-ray inspection head is required, resulting in low cost. The X-ray inspection head possesses a composite motion consisting of movement along the pipe's direction and its own rotational motion, i.e., helical motion, enabling thorough inspection of the pipe's interior during helical movement. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the state of the device moving in a straight pipe according to an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the state of the present invention when moving in a bend;

[0017] Figure 3 This is a partial structural diagram of an embodiment of the present invention;

[0018] Figure 4 for Figure 3 Enlarged view of the structure at point A in the middle;

[0019] Figure 5 This is a schematic diagram of the magnetic adsorption unit being installed on the roller.

[0020] Reference numerals: 1. Mounting cover; 2. Mounting platform one; 3. Hinge seat; 4. Retractable rod; 5. Wheel frame; 6. Roller; 61. Magnetic adsorption unit; 7. Lead screw; 71. Lead screw nut; 8. Moving cylinder; 9. Mounting platform two; 10. Connecting rod; 11. Filter screen; 12. X-ray inspection head; 13. Mounting plate; 14. Slide cylinder; 15. Guide rod; 16. Threaded knob; 17. Belt; 18. Pulley two; 19. Rotating shaft; 20. Bracket; 21. Gear; 22. Gear ring; 23. Rotating seat; 24. Cross coupling. Detailed Implementation

[0021] Example 1

[0022] like Figures 1-5 As shown in the figure, the boiler scale detection device proposed in this embodiment includes a traveling mechanism, a cross coupling 24, and a detection mechanism.

[0023] like Figure 1 and Figure 2 As shown, the traveling mechanism consists of two sets of relatively distributed components. The traveling mechanism includes a moving cylinder 8, multiple sets of retractable components evenly distributed around the moving cylinder 8, and a drive assembly that drives the moving cylinder 8 to move linearly. The drive assembly includes a mounting cover 1, a mounting platform 2 at one end of the mounting cover 1, a lead screw 7 rotatably mounted on the mounting platform 2, a lead screw nut 71 threadedly connected to the lead screw 7 and mounted on the moving cylinder 8, and a motor located inside the mounting cover 1 that drives the lead screw 7 to rotate. The motor can drive the lead screw 7 to rotate in both directions. The lead screw 7 drives the lead screw nut 71 to move, and the lead screw nut 71 drives the moving cylinder 8 to move. During linear movement, the moving cylinder 8 can synchronously unfold or retract the multiple sets of retractable components, thereby enabling adjustment of the distance between the outer ends of the multiple sets of retractable components. Due to the self-locking nature of the threaded connection between the lead screw 7 and the lead screw nut 71, the multiple sets of retractable components can stably maintain their adjusted unfolded state.

[0024] The movable cylinder 8 has a mounting platform 9 at its outer end. The retraction assembly includes a roller 6 at its outer end, a motor driving the roller 6 to rotate, a hinge seat 3 mounted on the mounting platform 2, a retraction rod 4 hinged at one end to the hinge seat 3, a connecting rod 10 hinged at both ends to the retraction rod 4 and the mounting platform 9 respectively, and a wheel frame 5 mounted on the outer end of the retraction rod 4. When the movable cylinder 8 moves, it drives the mounting platform 9 to move, which in turn drives the connecting rod 10 to move. The connecting rod 10 pushes the retraction rod 4 outward or pulls it inward, thereby adjusting the retraction of the retraction rod 4. This also adjusts the retraction of the roller 6 at the outer end of the retraction rod 4, allowing all rollers 6 to be adjusted to roll adaptively on the inner walls of pipes of different specifications. For adjusting the retraction state of multiple sets of retraction assemblies, the inner diameter of the target pipe is used as the reference. Specifically, the motor drives the lead screw 7 to rotate, ultimately adjusting multiple sets of retraction assemblies synchronously so that multiple rollers 6 roll simultaneously on the inner wall of the pipe.

[0025] like Figures 1-3 As shown, roller 6 is rotatably mounted on wheel frame 5, and the power motor is mounted on wheel frame 5. Only one power motor can be installed in each traveling mechanism group, driving the corresponding roller 6 to rotate. When this detection device moves forward in the pipeline, only the power motor in the front traveling mechanism can be activated, or the power motor in the rear traveling mechanism can be activated for auxiliary assistance. Similarly, when this detection device moves backward in the pipeline, only the power motor in the rear traveling mechanism can be activated, or the power motor in the front traveling mechanism can be activated for auxiliary assistance.

[0026] In addition, the roller 6 has a groove on its side, into which a magnetic adsorption unit 61 is embedded. By installing the magnetic adsorption unit 61, the detection device can use magnetic attraction to adhere to the inner wall of the pipe and move. In this case, it is not necessary to adjust multiple sets of retractable components so that all rollers 6 roll on the inner wall of the pipe; it is sufficient to ensure that at least two rollers 6 can roll on the inner wall. Larger sizes can be used for the rollers 6 and the magnetic adsorption unit 61 to ensure sufficient magnetic attraction and allow the detection device to adhere to the inner wall of the pipe and move.

[0027] like Figure 1 As shown, the outer end of the movable cylinder 8 has an opening, and a filter screen 11 is installed at the opening to prevent debris from entering the interior of the movable cylinder 8.

[0028] A cross coupling 24 connects the two sets of traveling mechanisms. The mounting cover 1 has a flange portion one at one end, and the outer end of the cross coupling 24 has a flange portion two. Flange portion one and flange portion two are connected by bolts and nuts. When the testing device moves within a straight pipe, the two sets of traveling mechanisms are symmetrically distributed on both sides of the cross coupling 24. When the testing device moves within a curved pipe, the cross coupling 24 automatically and adaptively twists, causing the two sets of traveling mechanisms to be relatively tilted, enabling movement even within curved pipes and effectively expanding its applicability.

[0029] The inspection mechanism includes a radiographic inspection head 12 located on the outer periphery of a set of traveling mechanisms and a rotating assembly that drives the radiographic inspection head 12 to rotate circumferentially. When the traveling mechanism travels, the rotating assembly drives the radiographic inspection head 12 to rotate. The radiographic inspection head 12 has a composite motion consisting of movement along the axial direction of the pipe and rotational motion, that is, the movement path of the radiographic inspection head 12 is helical.

[0030] This embodiment is applicable to mobile inspection in both straight and curved pipes, offering flexibility and a wide range of applications. Furthermore, it requires only one X-ray inspection head 12, resulting in low cost. The X-ray inspection head 12 moves along the pipe's direction via a traveling mechanism, and during this movement, a rotating component drives the X-ray inspection head 12 to rotate. The X-ray inspection head 12 exhibits a combined motion—a helical motion—comprising movement along the pipe's direction and its own rotation, enabling thorough inspection of the pipe's interior during this helical movement.

[0031] Example 2

[0032] like Figures 1-5 As shown, this embodiment of the boiler scale detection device, compared to Embodiment 1, includes a rotating assembly comprising a mounting assembly, a bracket 20 and a rotating seat 23 mounted on a mounting cover 1, a rotating shaft 19 rotatably mounted on the bracket 20, a gear 21 coaxially mounted on the rotating shaft 19, a gear ring 22 rotatably mounted on the rotating seat 23 and meshing with the gear 21, and a power assembly for driving the rotating shaft 19 to rotate. One end of the mounting assembly is mounted on the side of the gear ring 22, and the X-ray detection head 12 is mounted on the other end of the mounting assembly. The power assembly includes a motor mounted inside the mounting cover 1, a first pulley driven by the motor, a second pulley 18 coaxially mounted on the rotating shaft 19, and a belt 17 fitted onto the first pulley and the second pulley 18. The mounting cover 1 has a notch for the belt 17 to pass through. When the X-ray inspection head 12 needs to be driven to rotate, the motor drives pulley one to rotate. Pulley one drives pulley two 18 to rotate via belt 17. Pulley two 18 drives shaft 19 to rotate. Shaft 19 drives gear ring 22 to rotate via gear 21. Rotating seat 23 provides support for the rotation of gear ring 22. Gear ring 22 drives X-ray inspection head 12 to rotate via mounting assembly. X-ray inspection head 12 rotates around mounting cover 1, which can fully detect the oxide scale on the inner wall of the pipe in the outer circumferential direction.

[0033] The mounting assembly includes a mounting plate 13, a slide cylinder 14, a guide rod 15, and a threaded knob 16. The X-ray inspection head 12 is mounted on the mounting plate 13, which is located at the outer end of the slide cylinder 14. The slide cylinder 14 is slidably mounted on the guide rod 15, which is located on the side of the gear ring 22. The threaded knob 16 is threadedly connected to the slide cylinder 14 and abuts against the guide rod 15. The extension position of the X-ray inspection head 12 is adjustable. To adjust, first loosen the threaded knob 16 outwards, then adjust the position of the slide cylinder 14 on the guide rod 15. Once the target position is reached, tighten the threaded knob 16 onto the guide rod 15, thus determining the position of the X-ray inspection head 12. The adjustment method is very simple and convenient.

[0034] In this embodiment, the extension position of the X-ray inspection head 12 is adjusted by installing components. When the inner diameter of the pipe is large, the extension position of the X-ray inspection head 12 is adjusted further out; when the inner diameter of the pipe is small, the extension position of the X-ray inspection head 12 is adjusted closer, ensuring that the X-ray inspection head 12 maintains an effective detection distance from the inner wall of the pipe. When the X-ray inspection head 12 moves in a spiral motion, it can perform sufficient oxide scale detection on the inner side of the pipe.

[0035] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A boiler scale detection device, characterized in that, include: The walking mechanism consists of two sets of components distributed in opposite directions, including a moving cylinder (8), multiple sets of retracting and extending components evenly distributed around the moving cylinder (8), and a drive component that drives the moving cylinder (8) to move linearly. The retracting and extending components include a roller (6) at the outer end and a power motor that drives the roller (6) to rotate. A cross coupling (24) is connected between the two sets of traveling mechanisms; The inspection mechanism includes a radiographic inspection head (12) located on the outer periphery of a set of walking mechanisms and a rotating assembly that drives the radiographic inspection head (12) to rotate circumferentially. When the walking mechanism moves, the radiographic inspection head (12) moves in a spiral path.

2. The boiler scale detection device according to claim 1, characterized in that, The drive assembly includes a mounting cover (1), a mounting platform (2) disposed at one end of the mounting cover (1), a lead screw (7) rotatably disposed on the mounting platform (2), a lead screw nut (71) threadedly connected to the lead screw (7) and disposed on the movable cylinder (8), and a motor disposed inside the mounting cover (1) and driving the lead screw (7) to rotate.

3. The boiler scale detection device according to claim 2, characterized in that, The outer end of the movable cylinder (8) is provided with a second mounting platform (9). The retracting assembly includes a hinge seat (3) provided on the first mounting platform (2), a retracting rod (4) with one end hinged to the hinge seat (3), a connecting rod (10) with both ends hinged to the retracting rod (4) and the second mounting platform (9) respectively, and a wheel frame (5) provided on the outer end of the retracting rod (4). The roller (6) is rotatably mounted on the wheel frame (5), and the power motor is mounted on the wheel frame (5).

4. The boiler scale detection device according to claim 2, characterized in that, The outer end of the movable cylinder (8) has an opening, and a filter screen (11) is installed at the opening.

5. A boiler scale detection device according to claim 2, characterized in that, The mounting cover (1) has a flange part one at one end, and the cross coupling (24) has a flange part two at the outer end. The flange part one and the flange part two are connected by bolts and nuts.

6. A boiler scale detection device according to claim 2, characterized in that, The rotating assembly includes a mounting assembly, a bracket (20) and a rotating seat (23) mounted on the mounting cover (1), a rotating shaft (19) rotatably mounted on the bracket (20), a gear (21) coaxially mounted on the rotating shaft (19), a gear ring (22) rotatably mounted on the rotating seat (23) and meshing with the gear (21), and a power assembly for driving the rotating shaft (19) to rotate. One end of the mounting assembly is mounted on the side of the gear ring (22), and the X-ray detection head (12) is mounted on the other end of the mounting assembly.

7. A boiler scale detection device according to claim 6, characterized in that, The mounting assembly includes a mounting plate (13), a slide cylinder (14), a guide rod (15), and a threaded knob (16). The X-ray inspection head (12) is mounted on the mounting plate (13), which is located at the outer end of the slide cylinder (14). The slide cylinder (14) is slidably mounted on the guide rod (15), which is located on the side of the gear ring (22). The threaded knob (16) is threadedly connected to the slide cylinder (14) and abuts against the guide rod (15).

8. The boiler scale detection device according to claim 1, characterized in that, The roller (6) has a groove on its side, and a magnetic adsorption unit (61) is embedded in the groove.

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