A steel structure damage identification and monitoring device

Abstract

The present invention relates to the technical field of identification and monitoring devices, and in particular to an identification and monitoring device for steel structure damage. Its technical solution includes at least two groups of multiple eddy current sensors in a circular array, and also includes at least two groups of monitoring modules. The two adjacent groups of monitoring modules are connected by flexible connectors. The monitoring module includes a base, a support component installed on the base and in contact with the steel structure, and an identification component for identifying surface cracks of the steel structure. A driving component is installed in the base, and the driving component drives the identification component to rotate in the steel structure under the action of fluid flow. The present invention can drive multiple eddy current sensors to rotate under the action of internal circulation of the pipeline, realize all-round scanning of the inner wall of the pipeline, and prevent the occurrence of detection blind spots in the gap between two eddy current sensors, thereby increasing the variable diameter range of multiple protective shells to adapt to steel pipelines with different inner diameters.

Description

Technical Field

[0001] The invention relates to the technical field of damage identification and monitoring devices, and in particular to a steel structure damage identification and monitoring device. Background Art

[0002] Steel structure is a common type of building and engineering structure, mainly composed of steel. The main materials of steel structure are various types of steel, including carbon steel, stainless steel, alloy steel, etc. Steel structure is assembled by welding, bolting or riveting. These connection methods can provide high structural strength and stability. Steel pipe is one of the commonly used components in steel structure. Steel pipe is often used to transport fluids, gases or as a pressure-bearing component.

[0003] The condition of the inner wall of a steel pipe that transports gas or fluid is critical to the safe operation of the pipeline. Corrosion, cracks, deposits or other defects may cause leakage, reduce transportation efficiency, or even cause safety accidents. When conducting inspections, eddy current testing can be used. Eddy current testing applies a magnetic field inside the steel pipe to detect changes in the electromagnetic effect of the inner wall of the steel pipe to find defects.

[0004] The device for detecting the inside of a steel pipe is generally equipped with a plurality of eddy current sensors arranged in a circular array, and is equipped with an adjustment mechanism for controlling the diameter of the circle formed by the plurality of eddy current sensors, so as to adapt to pipes of different thicknesses and adjust the gap between the eddy current sensor and the inner wall of the pipe. However, there will be a certain gap between two adjacent eddy current sensors. When the gap is small, these sensors can cover the entire detection area. However, if the spacing between two adjacent sensors is small, when the adjustment mechanism reduces the circle formed by the plurality of eddy current sensors arranged in a circular array, the gap between the two adjacent eddy current sensors will gradually reduce. When the gap is 0, it will not be able to continue to reduce, so that the reduction range will also be smaller. When the eddy current sensors are enlarged in a circle, the gap between the two adjacent eddy current sensors will increase, which will make it difficult for the eddy current sensors to cover the entire detection area, resulting in a decrease in detection accuracy. In summary, the existing detection device generally needs to be customized for pipes of specified diameters, has poor applicability, and cannot meet the detection operations of pipes of various diameters. Summary of the invention

[0005] The purpose of the present invention is to provide a device for identifying and monitoring steel structure damage in view of the problems existing in the background technology.

[0006] The technical solution of the present invention is a device for identifying and monitoring damage of a steel structure, comprising at least two groups of a plurality of eddy current sensors in a circular array, and further comprising:

[0007] At least two groups of monitoring modules, two adjacent groups of monitoring modules are connected by a flexible connector;

[0008] The monitoring module includes a base, a supporting component mounted on the base and in contact with the steel structure, and an identification component for identifying surface cracks of the steel structure. A driving component is installed in the base, and the driving component drives the identification component to rotate in the steel structure under the action of fluid flow;

[0009] The identification component is provided with a distance adjustment component, which limits the maximum diameter of the circle formed by the multiple eddy current sensors and expands the circle formed by the multiple eddy current sensors to the maximum flexibility. When the distance adjustment component is acted upon by the fluid, it drives the multiple eddy current sensors to expand;

[0010] The avoidance module is installed in the identification component, and the avoidance module includes an anti-collision component that drives multiple eddy current sensors to retract after contacting the protrusions on the steel structure, and also includes a delay component that delays the resetting time of the eddy current sensors.

[0011] Optionally, the supporting component includes a base ring rotatably mounted on the base, a pressure ring rotatably and slidably mounted on the base, a plurality of sliding rods fixedly mounted on the pressure ring, the sliding rods are slidably connected to the base ring, a plurality of first springs are fixedly mounted on the pressure ring, the other end of the first spring is fixedly connected to the base ring, a connecting ring rotatably mounted on the base, a plurality of sliding sleeves rotatably mounted on the connecting ring, an adjusting rod slidably mounted on the sliding sleeve, a mileage wheel rotatably mounted on the adjusting rod, a first connecting rod rotatably mounted on the sliding sleeve, the other end of the first connecting rod is rotatably connected to the pressure ring, and a limiting component for limiting the adjusting rod is mounted on the sliding sleeve.

[0012] Optionally, the limiting assembly includes a box body fixedly mounted on the sleeve, the box body is connected to the sleeve through a valve, a sealing plate is slidably mounted in the box body, a second spring is fixedly mounted on the sealing plate, the other end of the second spring is fixedly connected to the box body, and hydraulic oil is provided in the box body and on the side of the sealing plate close to the sleeve, in the sleeve and in the valve.

[0013] Optionally, the distance adjustment assembly includes a slip ring slidably mounted on the base and a fixed ring fixedly mounted on the base, an internally threaded rod rotatably mounted on the fixed ring, the internally threaded rod is internally threadedly connected to a limit rod, the limit rod is slidably connected to the base, a guide rod is fixedly mounted on the fixed ring, the slip ring is slidably connected to the guide rod, a third spring is fixedly mounted on the guide rod, the other end of the third spring is fixedly connected to the slip ring, a support block is fixedly mounted on the fixed ring, two second connecting rods are rotatably mounted on the support block, a third connecting rod is rotatably mounted on the slip ring, the third connecting rod is rotatably connected to a second connecting rod close to the third connecting rod, a protective shell is rotatably mounted on the other ends of the two second connecting rods, and the eddy current sensor is fixedly mounted inside the protective shell.

[0014] Optionally, an arc-shaped protrusion is provided at one end of the protective shell, and an arc-shaped recess is provided at the other end of the protective shell.

[0015] Optionally, the base is provided with a flow hole penetrating the base, and the driving component includes a bracket fixedly mounted in the flow hole, and a vortex blade is fixedly mounted on the bracket.

[0016] Optionally, a driving leather cup is fixedly mounted on the base, and a plurality of through holes are provided on the fixing ring.

[0017] Optionally, the avoidance module includes a plurality of pressure rods slidably mounted on the driving leather cup, the pressure rods are threadedly connected with a lifting rod, the lifting rods are rotatably mounted with a wheel seat, the wheel seat is rotatably mounted with an avoidance wheel, the other end of the pressure rods is rotatably mounted with a driving wheel, a fourth spring is fixedly mounted on the pressure rod, the other end of the fourth spring is fixedly connected to the driving leather cup, a plurality of driving blocks are slidably mounted on the base, the driving blocks are threadedly connected with a resistance rod, the resistance rod penetrates the driving leather cup and extends to the outside of the driving leather cup, and the resistance rod is slidably and rotatably connected to the driving leather cup.

[0018] Optionally, the driving block is provided with a first slope and a second slope from top to bottom, the angle between the first slope and the axis of the base is 30°, and the angle between the second slope and the axis of the base is 45°.

[0019] Optionally, the delay assembly includes a hollow rod fixedly mounted on the slip ring, a speed limiting rod slidably mounted in the hollow rod, the speed limiting rod is fixedly connected to the fixed ring, a liquid storage tank is fixedly mounted on the hollow rod, a first one-way valve is fixedly mounted on the hollow rod for allowing liquid to flow unidirectionally from the hollow rod to the inside of the liquid storage tank, a second one-way valve is fixedly mounted on the hollow rod for allowing liquid in the liquid storage tank to flow unidirectionally to the inside of the hollow rod, the first one-way valve and the second one-way valve connect the hollow rod and the liquid storage tank, the inner diameter of the second one-way valve is larger than the first one-way valve, a plug is slidably mounted in the liquid storage tank, a fifth spring is fixedly mounted on the plug, and the other end of the fifth spring is fixedly connected to the liquid storage tank.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] The present invention can drive multiple eddy current sensors to rotate under the action of internal circulation of the pipeline through a driving component, thereby realizing an all-round scanning of the inner wall of the pipeline, preventing the occurrence of a detection blind spot in the gap between two eddy current sensors, and further increasing the gap between two adjacent protective shells, thereby improving the variable diameter range of the multiple protective shells to adapt to steel pipelines with different inner diameters.

[0022] Furthermore, by setting up multiple monitoring modules and making the protective shells on the multiple monitoring modules in a staggered state, the gap between two adjacent protective shells can be further expanded, thereby further improving the applicability of the device. The two pipelines are connected through an elbow. Since the two adjacent monitoring modules are connected by a flexible connector, the device can pass through an elbow with a smaller diameter, thereby ensuring the fluidity of the device inside the steel pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The structural diagram of the steel structure damage identification and monitoring device is given. Figure 1 ;

[0024] Figure 2 The structural diagram of the steel structure damage identification and monitoring device is given. Figure 2 ;

[0025] Figure 3 The structural diagram of the steel structure damage identification and monitoring device is given. Figure 3 ;

[0026] Figure 4 It is a structural schematic diagram of the plugging piece of the present invention;

[0027] Figure 5 The structure of the monitoring module is shown in Figure 2. Figure 1 ;

[0028] Figure 6 The structure of the monitoring module is shown in Figure 2. Figure 2 ;

[0029] Figure 7 It is a schematic diagram of the structure of the driving component of the present invention;

[0030] Figure 8 An exploded diagram of the monitoring module of the present invention;

[0031] Fig. 9 It is a structural schematic diagram of the supporting component of the present invention;

[0032] Fig.10 It is a structural schematic diagram of the limit assembly of the present invention;

[0033] Fig.11 Schematic diagram of the position distribution of slip rings;

[0034] Fig.12 The structure of the distance adjustment component of the present invention is shown in FIG. Figure 1 ;

[0035] Fig.13 The structure of the distance adjustment component of the present invention is shown in FIG. Figure 2 ;

[0036] Fig.14 To avoid the structural diagram of the module Figure 1 ;

[0037] Fig.15 To avoid the structural diagram of the module Figure 2 ;

[0038] Fig.16 for Fig.14 A partial enlarged view of the middle A;

[0039] Fig.17 for Fig.15 A partial enlarged view of point B in the middle;

[0040] Fig.18 The structure of the delay component of the present invention is shown in FIG. Figure 1 ;

[0041] Fig.19 The structure of the delay component of the present invention is shown in FIG. Figure 2 .

[0042] Figure numerals: 1, monitoring module; 101, flexible connector; 2, base; 201, flow hole; 202, plug; 3, support component; 301, base ring; 302, pressure ring; 303, slide rod; 304, first spring; 305, connecting ring; 306, sliding sleeve; 307, adjusting rod; 308, mileage wheel; 309, first connecting rod; 310, box; 311, valve; 312, sealing plate; 313, second spring; 4, identification component; 401, slide ring; 402, fixing ring; 4021, through hole; 403, internal threaded rod; 404, limit rod; 405, guide rod; 406, third spring; 407, support block; 4 08. Second connecting rod; 409. Third connecting rod; 410. Protective shell; 4101. Arc-shaped protrusion; 4102. Arc-shaped concave portion; 5. Driving component; 501. Bracket; 502. Vortex blade; 6. Avoidance module; 601. Pressure rod; 602. Lifting rod; 603. Wheel seat; 604. Avoidance wheel; 605. Driving wheel; 606. Fourth spring; 607. Driving block; 6071. First slope; 6072. Second slope; 608. Resistance rod; 7. Hollow rod; 701. Speed ​​limit rod; 702. First one-way valve; 703. Second one-way valve; 704. Liquid storage tank; 705. Plug; 706. Fifth spring; 8. Driving leather cup. DETAILED DESCRIPTION

[0043] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0044] Embodiment 1, as Figures 1 to 10As shown, a device for identifying and monitoring steel structure damage proposed by the present invention includes at least two groups of multiple eddy current sensors in a circular array. When an alternating current passes through the eddy current sensor, an alternating magnetic field is generated around it. If the eddy current sensor is close to the steel pipe, eddy currents will be generated in the eddy current sensor, and the distribution of the eddy currents will be affected by the material properties and structure. If there are defects in the steel pipe, the distribution of the eddy currents will change, which will cause the impedance of the eddy current sensor to change. By detecting these changes, the existence and characteristics of the defects can be inferred. It also includes at least two groups of monitoring modules 1, and two adjacent groups of monitoring modules 1 are connected by a flexible connector 101. By using the flexible connector 101 for connection, two adjacent monitoring modules 1 can be rotated synchronously, and the two monitoring modules 1 can be bent, so that multiple monitoring modules 1 can pass through the elbow of the pipeline.

[0045] Furthermore, the monitoring module 1 includes a base 2, a support component 3 installed on the base 2 and in contact with the steel structure, and an identification component 4 for identifying surface cracks of the steel structure. A driving component 5 is installed in the base 2, and the driving component 5 drives the identification component 4 to rotate in the steel structure under the action of fluid flow. The supporting component 3 will support the base 2 so that the axis of the base 2 and the axis of the pipeline are in a colinear position, wherein the eddy current sensor is located on the identification component 4, and the base 2 will move inside the pipeline under the action of the fluid inside the pipeline (water flow or air flow), thereby performing a full-scale detection of the entire pipeline. The eddy current sensor can be driven to rotate by the driving component 5, and the rotating eddy current sensor can ensure that the eddy current sensor covers different areas of the pipeline and reduces the detection blind area. The eddy current sensor can scan the surface of the object to be measured more carefully, improve the detection resolution, and thus more accurately identify and locate defects. Prevent the gaps between the eddy current sensors from causing certain areas to not be detected.

[0046] Furthermore, the supporting component 3 includes a base ring 301 rotatably mounted on the base 2, and a pressure ring 302 rotatably and slidably mounted on the base 2, the pressure ring 302 is fixedly mounted with a plurality of sliding rods 303, the sliding rods 303 are slidably connected to the base ring 301, a plurality of first springs 304 are fixedly mounted on the pressure ring 302, the other end of the first spring 304 is fixedly connected to the base ring 301, a connecting ring 305 is rotatably mounted on the base 2, a plurality of sliding sleeves 306 are rotatably mounted on the connecting ring 305, an adjusting rod 307 is slidably mounted on the sliding sleeve 306, a mileage wheel 308 is rotatably mounted on the adjusting rod 307, a first connecting rod 309 is rotatably mounted on the sliding sleeve 306, the other end of the first connecting rod 309 is rotatably connected to the pressure ring 302, and a limiting component for limiting the adjusting rod 307 is installed on the sliding sleeve 306. Under the action of the first spring 304, the pressure ring 302 can be pushed to move away from the base ring 301. The moving pressure ring 302 will drive the multiple sleeves 306 to flip outward through the first connecting rod 309, thereby driving the multiple mileage wheels 308 to expand outward, so that the mileage wheels 308 contact the inner wall of the pipeline and apply a certain pressure to the inside of the pipeline. At the same time, it can support the base 2 so that the axis of the base 2 and the axis of the pipeline are in a colinear position.

[0047] Among them, the limiting assembly includes a box body 310 fixedly installed on the sleeve 306, the box body 310 is connected to the sleeve 306 through a valve 311, a sealing plate 312 is slidably installed in the box body 310, a second spring 313 is fixedly installed on the sealing plate 312, and the other end of the second spring 313 is fixedly connected to the box body 310, and hydraulic oil is provided in the box body 310 and on the side of the sealing plate 312 close to the sleeve 306, in the sleeve 306, and in the valve 311. When the mileage wheel 308 contacts the inner wall of the steel pipe, the elastic force of the first spring 304 will not be able to push the pressure ring 302 to move. At this time, the unreleased elastic force of the first spring 304 will act on the mileage wheel 308, causing the mileage wheel 308 to apply pressure to the inner wall of the steel pipe. By adjusting the total length of the sleeve 306 and the adjusting rod 307, the moving distance of the pressure ring 302 when the mileage wheel 308 contacts the inside of the pipe can be adjusted, thereby controlling the compression amount of the first spring 304, thereby controlling the pressure applied by the first spring 304 to the mileage wheel 308, and then controlling the pressure between the mileage wheel 308 and the inner wall of the pipe.

[0048] When the total length of the sleeve 306 and the adjusting rod 307 is adjusted, the valve 311 needs to be opened. At this time, under the action of the second spring 313, the sealing plate 312 will be driven to squeeze the hydraulic oil inside the box 310, thereby pressing the hydraulic oil into the sleeve 306. At this time, the adjusting rod 307 can slide freely on the sleeve 306, and the total length of the sleeve 306 and the adjusting rod 307 can be adjusted. When the adjustment is completed, the hydraulic oil inside the sleeve 306 will not be able to flow, thereby preventing the adjusting rod 307 from sliding freely on the sleeve 306.

[0049] It should be noted that the identification component 4 is provided with a distance adjustment component, which limits the maximum diameter of the circle formed by the multiple eddy current sensors and expands the circle formed by the multiple eddy current sensors to the maximum flexibility. When the distance adjustment component is acted upon by the fluid, the multiple eddy current sensors are driven to expand. The distance adjustment component can drive the multiple eddy current sensors to expand or contract, so as to adjust the distance between the eddy current sensors and the inner wall of the pipeline, and enable the multiple eddy current sensors to enter the pipelines of different diameters.

[0050] Furthermore, the distance adjustment assembly includes a slip ring 401 slidably mounted on the base 2 and a fixed ring 402 fixedly mounted on the base 2, an internally threaded rod 403 is rotatably mounted on the fixed ring 402, the internally threaded rod 403 is internally threadedly connected to a limit rod 404, the limit rod 404 is slidably connected to the base 2, a guide rod 405 is fixedly mounted on the fixed ring 402, the slip ring 401 is slidably connected to the guide rod 405, a third spring 406 is fixedly mounted on the guide rod 405, the other end of the third spring 406 is fixedly connected to the slip ring 401, a support block 407 is fixedly mounted on the fixed ring 402, two second connecting rods 408 are rotatably mounted on the support block 407, a third connecting rod 409 is rotatably mounted on the slip ring 401, the third connecting rod 409 is rotatably connected to a second connecting rod 408 close to the third connecting rod 409, a protective shell 410 is rotatably mounted on the other ends of the two second connecting rods 408, and the eddy current sensor is fixedly mounted inside the protective shell 410. Under the action of the third spring 406, the slip ring 401 will move towards the direction close to the fixed ring 402, and then drive the multiple third connecting rods 409 to rotate. The rotating third connecting rods 409 will drive the second connecting rod 408 to rotate. The two second connecting rods 408 are in a parallel state, and then under the action of the second connecting rod 408, the multiple protective shells 410 can be driven to expand outward, and the multiple protective shells 410 can always remain parallel to the axis of the base 2.

[0051] By rotating the internal threaded rod 403 to drive the limit rod 404 to move, the distance between the end of the limit rod 404 and the end of the guide rod 405 can be adjusted, and when the slip ring 401 abuts against the limit rod 404, the slip ring 401 will not be able to move further, and the maximum expansion degree of the multiple protective shells 410 can be controlled, so that the maximum expansion value of the protective shell 410 can be adjusted according to different pipelines to adapt to the detection of steel pipelines with different diameters.

[0052] It should be noted that an arc-shaped protrusion 4101 is provided at one end of the protective shell 410, and an arc-shaped recessed portion 4102 is provided at the other end of the protective shell 410. When the eddy current sensor moves inside the pipeline for detection, it needs to remain stable to prevent the flow of water or other media from causing shaking to the sensor. The shaking of the sensor will cause the received signal to be unstable, thereby affecting the accurate judgment of the defect. The arrangement of the arc-shaped protrusion 4101 and the arc-shaped recessed portion 4102 allows the fluid to enter through the arc-shaped protrusion 4101 and flow out through the arc-shaped recessed portion 4102, which can cause the fluid to exert an outward expansion force on the protective shell 410, and the protection shell 410 can be prevented from moving through the restriction of the limit rod 404, preventing the protective shell from driving the eddy current sensor to move under the action of the water flow.

[0053] Since the welds of steel pipes or the steel pipes may be concave when impacted by external forces, a bulge may be formed inside the pipe. In order to improve the accuracy of the inspection, it is necessary to maintain a small gap between the protective shell 410 and the inner wall of the pipe. The above design can maintain a small gap between the protective shell 410 and the inside of the pipe, and when encountering a concave steel pipe, multiple protective shells 410 can shrink after contacting the bulge inside the pipe, so that there is no need to reserve a gap between the protective shell 410 and the inner wall of the pipe to avoid the bulge inside the pipe.

[0054] Furthermore, the base 2 is provided with a flow hole 201 penetrating the base 2, and the driving component 5 includes a bracket 501 fixedly installed in the flow hole 201, and a vortex blade 502 is fixedly installed on the bracket 501. When water or air flows through the vortex blade 502, the vortex blade 502 will rotate, and the rotating vortex blade 502 will drive the base 2 to rotate on the supporting component 3, thereby driving the multiple eddy current sensors to rotate, realizing a full-range scan of the inner wall of the pipeline, preventing the occurrence of a detection blind spot in the gap between the two eddy current sensors, and then increasing the gap between two adjacent protective shells 410, thereby increasing the diameter range of the multiple protective shells 410 to adapt to steel pipelines with different inner diameters.

[0055] It is worth noting that by setting up multiple monitoring modules 1 and making the protective shells 410 on the multiple monitoring modules 1 in a staggered state, the gap between two adjacent protective shells 410 can be further expanded, thereby further improving the applicability of the device. The two pipelines are connected through an elbow. Since the two adjacent monitoring modules 1 are connected by a flexible connector 101, the device can pass through an elbow with a smaller diameter, thereby ensuring the fluidity of the device inside the steel pipeline.

[0056] Among them, a plugging piece 202 is detachably installed on a base 2 that contacts the fluid. The plugging piece 202 is used to block the diameter of the flow hole 201, thereby controlling the flow into the flow hole 201, thereby controlling the rotation speed of the base 2, and controlling the flow speed of the base 2 along the pipeline.

[0057] Furthermore, a driving cup 8 is fixedly mounted on the base 2, and a plurality of through holes 4021 are provided on the fixing ring 402. When water flows through the driving cup 8, the driving cup 8 can drive the base 2 to move along the pipeline.

[0058] The working principle of this embodiment is as follows: under the action of the first spring 304, the pressure ring 302 can be pushed to move in the direction away from the base ring 301. The moving pressure ring 302 will drive the multiple sleeves 306 to flip outward through the first connecting rod 309, thereby driving the multiple mileage wheels 308 to expand outward, so that the mileage wheels 308 contact the inner wall of the pipeline and apply a certain pressure to the inside of the pipeline. At the same time, it can support the base 2 so that the axis of the base 2 and the axis of the pipeline are in a colinear position.

[0059] Under the action of the third spring 406, the slip ring 401 will move toward the direction close to the fixed ring 402, and then drive the plurality of third connecting rods 409 to rotate. The rotating third connecting rods 409 will drive the second connecting rods 408 to rotate. The two second connecting rods 408 are in a parallel state, and then the plurality of protective shells 410 can be driven to expand outward under the action of the second connecting rods 408, and the plurality of protective shells 410 are always kept parallel to the axis of the base 2. By rotating the internal threaded rod 403 to drive the limit rod 404 to move, the distance between the end of the limit rod 404 and the end of the guide rod 405 can be adjusted, and when the slip ring 401 abuts against the limit rod 404, the slip ring 401 will not be able to move further, and then the maximum expansion degree of the plurality of protective shells 410 can be controlled, so that the maximum expansion value of the protective shells 410 can be adjusted according to different pipelines to adapt to the detection of steel pipelines with different diameters.

[0060] Embodiment 2, as Figures 10 to 19As shown, based on the first embodiment, the steel structure damage identification and monitoring device of this embodiment also includes an avoidance module 6 installed in the identification component 4, and the avoidance module 6 includes an anti-collision component that drives multiple eddy current sensors to shrink after contacting the protrusion on the steel structure, and also includes a delay component that delays the reset time of the eddy current sensor. By making the anti-collision component pass through the protrusion inside the pipeline before the protective shell 410, and driving the multiple protective shells 410 to shrink after contacting the protrusion inside the pipeline by the anti-collision component, the protective shell 410 is prevented from colliding with the protrusion, the eddy current sensor is prevented from vibrating, and the stability of the eddy current sensor operation is ensured. Since the multiple protective shells 410 will be reset under the action of the third spring 406 after shrinking, and resetting too quickly will cause the protective shell 410 to complete the reset before passing the protrusion inside the pipeline, which will still cause the protective shell 410 to collide with the protrusion. This problem can be prevented by the delay component.

[0061] The avoidance module 6 includes a plurality of pressure rods 601 slidably mounted on the driving leather cup 8, a lifting rod 602 is threadedly connected to the pressure rod 601, a wheel seat 603 is rotatably mounted on the lifting rod 602, a avoidance wheel 604 is rotatably mounted on the wheel seat 603, a driving wheel 605 is rotatably mounted on the other end of the pressure rod 601, a fourth spring 606 is fixedly mounted on the pressure rod 601, and the other end of the fourth spring 606 is fixedly connected to the driving leather cup 8, a plurality of driving blocks 607 are slidably mounted on the base 2, a resistance rod 608 is threadedly connected to the driving leather cup 8, the resistance rod 608 penetrates the driving leather cup 8 and extends to the outside of the driving leather cup 8, and the resistance rod 608 is slidably and rotatably connected to the driving leather cup 8. By rotating the lifting rod 602 to drive the avoidance wheel 604 to perform lifting and lowering motion, the avoidance wheel 604 can be brought into contact with the inner wall of the pipe with different inner diameters, and the avoidance wheel 604 will rotate with the rotation of the base 2.

[0062] When the avoidance wheel 604 contacts the protrusion in the pipe, the avoidance wheel 604 will drive the pressure rod 601 to slide on the driving leather cup 8, and the sliding driving leather cup 8 will drive the driving wheel 605 to squeeze the driving block 607, and the driving block 607 can be driven to slide on the base 2 by squeezing the driving block 607, and the sliding driving block 607 drives the resistance rod 608 to move, and the resistance rod 608 pushes the slip ring 401 to slide, thereby driving the multiple protective shells 410 to shrink, so that the protective shells 410 can avoid the protrusions inside the pipe in advance, thereby preventing the eddy current sensor from vibrating, and thereby ensuring the accuracy of the internal inspection of the pipe.

[0063] The abutment rod 608 can be moved on the driving block 607 by the abutment rod 608 , and the position of the abutment rod 608 can be adjusted according to the initial position of the slip ring 401 so that the abutment rod 608 abuts against the slip ring 401 .

[0064] It is worth noting that the driving block 607 is provided with a first slope 6071 and a second slope 6072 from top to bottom, the angle between the first slope 6071 and the axis of the base 2 is 30°, and the angle between the second slope 6072 and the axis of the base 2 is 45°. By setting the first slope 6071 and the second slope 6072, the driving block 607 can be moved in two stages under the action of the driving wheel 605. When the driving wheel 605 abuts against the first slope 6071, since the angle between the first slope 6071 and the axis of the base 2 is 30°, the distance moved by the driving block 607 is greater than the distance the pressure rod 601 descends. When the driving wheel 605 abuts against the second slope 6072, the moving distance of the driving block 607 is consistent with the descending distance of the pressure rod 601. This makes the contraction speed of the multiple protective shells 410 during contraction faster at first and then slower. Due to the internal bulge caused by the external force on the pipeline, Generally, it has a conical range, and because the multiple avoidance wheels 604 do not cover the entire inner wall of the pipe, when the avoidance wheel 604 contacts the protrusion on the inner wall of the pipe, the avoidance wheel 604 has passed the initial stage of the protrusion in the pipe, that is, the protective shell 410 is already relatively close to the protrusion at this time. The above arrangement can prevent the protective shell 410 from shrinking quickly when approaching the edge of the protrusion to prevent a collision. At this time, the kinetic energy of the base 2 will gradually decay, and the subsequent second slope 6072 will be more labor-saving than the transmission of the first slope 6071, ensuring that the base 2 can quickly pass through the protrusion and preventing the protective shell 410 from contacting the protrusion inside the pipe.

[0065] Among them, the delay component includes a hollow rod 7 fixedly mounted on the slip ring 401, a speed limiting rod 701 is slidably mounted in the hollow rod 7, the speed limiting rod 701 is fixedly connected to the fixed ring 402, a liquid storage tank 704 is fixedly mounted on the hollow rod 7, a first one-way valve 702 is fixedly mounted on the hollow rod 7 for allowing liquid to flow from the hollow rod 7 to the inside of the liquid storage tank 704 in one direction, a second one-way valve 703 is fixedly mounted on the hollow rod 7 for allowing liquid inside the liquid storage tank 704 to flow in one direction to the inside of the hollow rod 7, the first one-way valve 702 and the second one-way valve 703 connect the hollow rod 7 and the liquid storage tank 704, the inner diameter of the second one-way valve 703 is larger than the first one-way valve 702, a plug 705 is slidably mounted in the liquid storage tank 704, a fifth spring 706 is fixedly mounted on the plug 705, and the other end of the fifth spring 706 is fixedly connected to the liquid storage tank 704. The liquid storage tank 704 and the hollow rod 7 are both filled with hydraulic oil. When the slip ring 401 drives the multiple protective shells 410 to shrink, the hollow rod 7 will move away from the speed limit rod 701, thereby increasing the volume inside the hollow rod 7. At this time, under the action of the fifth spring 706 and the plug 705, the hydraulic oil inside the liquid storage tank 704 can be pressed into the hollow rod 7 through the second one-way valve 703. When the slip ring 401 is reset under the action of the third spring 406, the hydraulic oil inside the hollow rod 7 needs to be pressed into the liquid storage tank 704. At this time, due to the small flow hole of the first one-way valve 702, the hydraulic oil inside the hollow rod 7 cannot flow out quickly, thereby extending the reset time of the slip ring 401 to ensure that the protective shell 410 will be reset only after passing through the protrusion inside the pipeline.

[0066] The working principle of this embodiment is as follows: by rotating the lifting rod 602 to drive the avoidance wheel 604 to perform lifting movement, the avoidance wheel 604 can be brought into contact with the inner wall of the pipe with different inner diameters. When the avoidance wheel 604 contacts the protrusion in the pipe, the avoidance wheel 604 will drive the pressure rod 601 to slide on the driving leather cup 8, and the sliding driving leather cup 8 will drive the driving wheel 605 to squeeze the driving block 607. By squeezing the driving block 607, the driving block 607 can be driven to slide on the base 2, and the sliding driving block 607 drives the resistance rod 608 to move, and the resistance rod 608 pushes the slip ring 401 to slide, thereby driving the multiple protective shells 410 to shrink, so that the protective shells 410 can avoid the protrusions inside the pipe in advance, thereby preventing the eddy current sensor from vibrating, and thereby ensuring the accuracy of the internal inspection of the pipe.

[0067] The liquid storage tank 704 and the hollow rod 7 are both filled with hydraulic oil. When the slip ring 401 drives the multiple protective shells 410 to shrink, the hollow rod 7 will move away from the speed limit rod 701, thereby increasing the volume inside the hollow rod 7. At this time, under the action of the fifth spring 706 and the plug 705, the hydraulic oil inside the liquid storage tank 704 can be pressed into the hollow rod 7 through the second one-way valve 703. When the slip ring 401 is reset under the action of the third spring 406, the hydraulic oil inside the hollow rod 7 needs to be pressed into the liquid storage tank 704. At this time, due to the small flow hole of the first one-way valve 702, the hydraulic oil inside the hollow rod 7 cannot flow out quickly, thereby extending the reset time of the slip ring 401 to ensure that the protective shell 410 will be reset only after passing through the protrusion inside the pipeline.

[0068] The above specific embodiments are only several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A device for identifying and monitoring steel structure damage, comprising at least two groups of eddy current sensors in a circular array, characterized in that: Also includes: At least two groups of monitoring modules (1), two adjacent groups of monitoring modules (1) being connected via a flexible connector (101); The monitoring module (1) comprises a base (2), a supporting component (3) mounted on the base (2) and in contact with a steel structure, and an identification component (4) for identifying cracks on the surface of the steel structure; a driving component (5) is mounted in the base (2); the driving component (5) drives the identification component (4) to rotate in the steel structure under the action of a fluid flow; The identification component (4) is provided with a distance adjustment component, the distance adjustment component limits the maximum diameter of the circle formed by the multiple eddy current sensors, and flexibly expands the circle formed by the multiple eddy current sensors to the maximum, and when the distance adjustment component is acted upon by the fluid, it drives the multiple eddy current sensors to expand; an avoidance module (6) installed in the identification component (4), the avoidance module (6) comprising an anti-collision component that drives a plurality of eddy current sensors to retract after contacting a protrusion on the steel structure, and also comprising a delay component that delays the resetting time of the eddy current sensors; The pitch adjustment assembly comprises a slip ring (401) slidably mounted on a base (2) and a fixed ring (402) fixedly mounted on the base (2); an internally threaded rod (403) is rotatably mounted on the fixed ring (402); the internally threaded rod (403) is internally threadedly connected to a limit rod (404); the limit rod (404) is slidably connected to the base (2); a guide rod (405) is fixedly mounted on the fixed ring (402); the slip ring (401) is slidably connected to the guide rod (405); a third spring (406) is fixedly mounted on the guide rod (405); The other end of the third spring (406) is fixedly connected to the slip ring (401); a support block (407) is fixedly mounted on the fixed ring (402); two second connecting rods (408) are rotatably mounted on the support block (407); a third connecting rod (409) is rotatably mounted on the slip ring (401); the third connecting rod (409) is rotatably connected to a second connecting rod (408) close to the third connecting rod (409); a protective shell (410) is rotatably mounted on the other ends of the two second connecting rods (408); and the eddy current sensor is fixedly mounted inside the protective shell (410); A driving leather cup (8) is fixedly mounted on the base (2), and a plurality of through holes (4021) are provided on the fixing ring (402); The avoidance module (6) comprises a plurality of pressure rods (601) slidably mounted on a driving leather cup (8), a lifting rod (602) being threadedly connected to the pressure rod (601), a wheel seat (603) being rotatably mounted on the lifting rod (602), a avoidance wheel (604) being rotatably mounted on the wheel seat (603), a driving wheel (605) being rotatably mounted on the other end of the pressure rod (601), a fourth spring (606) being fixedly mounted on the pressure rod (601), the other end of the fourth spring (606) being fixedly connected to the driving leather cup (8), a plurality of driving blocks (607) being slidably mounted on the base (2), a resisting rod (608) being threadedly connected to the driving leather cup (607), the resisting rod (608) penetrating the driving leather cup (8) and extending to the outside of the driving leather cup (8), the resisting rod (608) being slidably and rotatably connected to the driving leather cup (8).

2. The device for identifying and monitoring steel structure damage according to claim 1, characterized in that: The supporting component (3) comprises a base ring (301) rotatably mounted on the base (2), and a pressure ring (302) rotatably and slidably mounted on the base (2); the pressure ring (302) is fixedly mounted with a plurality of sliding rods (303), and the sliding rods (303) are slidably connected to the base ring (301); the pressure ring (302) is fixedly mounted with a plurality of first springs (304), and the other ends of the first springs (304) are fixedly connected to the base ring (301); A connecting ring (305) is provided, a plurality of sliding sleeves (306) are rotatably mounted on the connecting ring (305), an adjusting rod (307) is slidably mounted on the sliding sleeve (306), a mileage wheel (308) is rotatably mounted on the adjusting rod (307), a first connecting rod (309) is rotatably mounted on the sliding sleeve (306), the other end of the first connecting rod (309) is rotatably connected to the pressure ring (302), and a limiting component for limiting the adjusting rod (307) is installed on the sliding sleeve (306).

3. The device for identifying and monitoring steel structure damage according to claim 2, characterized in that: The limit assembly comprises a box body (310) fixedly mounted on the sliding sleeve (306); the box body (310) is connected to the sliding sleeve (306) via a valve (311); a sealing plate (312) is slidably mounted in the box body (310); a second spring (313) is fixedly mounted on the sealing plate (312); the other end of the second spring (313) is fixedly connected to the box body (310); hydraulic oil is provided in the box body (310) and on a side of the sealing plate (312) close to the sliding sleeve (306), in the sliding sleeve (306), and in the valve (311).

4. The device for identifying and monitoring steel structure damage according to claim 3, characterized in that: One end of the protective shell (410) is provided with an arc-shaped protruding portion (4101), and the other end of the protective shell (410) is provided with an arc-shaped recessed portion (4102).

5. The device for identifying and monitoring steel structure damage according to claim 1, characterized in that: The base (2) is provided with a flow hole (201) penetrating the base (2), and the driving component (5) comprises a bracket (501) fixedly mounted in the flow hole (201), and a vortex blade (502) is fixedly mounted on the bracket (501).

6. The device for identifying and monitoring steel structure damage according to claim 5, characterized in that: The driving block (607) is provided with a first slope (6071) and a second slope (6072) from top to bottom, the angle between the first slope (6071) and the axis of the base (2) is 30°, and the angle between the second slope (6072) and the axis of the base (2) is 45°.

7. The device for identifying and monitoring steel structure damage according to claim 6, characterized in that: The delay assembly comprises a hollow rod (7) fixedly mounted on a slip ring (401), a speed limiting rod (701) slidably mounted in the hollow rod (7), the speed limiting rod (701) being fixedly connected to the fixed ring (402), a liquid storage tank (704) fixedly mounted on the hollow rod (7), a first one-way valve (702) for allowing liquid to flow from the hollow rod (7) to the inside of the liquid storage tank (704) in one direction fixedly mounted on the hollow rod (7), and a valve (703) for allowing liquid in the liquid storage tank (704) to flow in one direction fixedly mounted on the hollow rod (7). The liquid body unidirectionally flows to the second one-way valve (703) inside the hollow rod (7); the first one-way valve (702) and the second one-way valve (703) connect the hollow rod (7) and the liquid storage tank (704); the inner diameter of the second one-way valve (703) is larger than that of the first one-way valve (702); a plug (705) is slidably installed in the liquid storage tank (704); a fifth spring (706) is fixedly installed on the plug (705); and the other end of the fifth spring (706) is fixedly connected to the liquid storage tank (704).

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