A micro-magnetic detection probe support

Abstract

The utility model discloses a kind of micro-magnetic detection probe supports, it is related to the technical field of micro-magnetic detection, including support pipe body, self-adapting support sliding assembly and control component. Support pipe body front end fixed micro-magnetic detection probe, middle part is provided with signal transmission cable;Control component includes control guide spring seat and control guide spring, cable passes among them;Self-adapting support sliding assembly is provided with more than three groups, each group includes guide wheel support front rod, guide wheel support rear rod, guide wheel connecting rod, guide wheel, guide wheel lifting push rod, guide wheel lifting movable ring and guide wheel lifting spring, and it is realized radial telescopic by parallelogram linkage mechanism and spring cooperation.This application can automatically adjust support height according to pipe diameter change, ensure the axial centring of probe in pipeline, and realize long-distance flexible push and the physical protection of signal cable.

Description

Technical Field

[0001] This utility model relates to the field of micro-magnetic detection technology, and in particular to a micro-magnetic detection probe bracket. Background Technology

[0002] Micromagnetic detection technology has wide applications in the field of pipeline non-destructive testing. When detecting internal defects in pipelines, a support device is needed to insert the micromagnetic detection probe into the pipeline under test. Existing detection support devices are typically simple in structure and lack adaptability to pipelines of different diameters. When the pipeline's inner diameter changes, existing devices cannot automatically adjust the support height according to the pipe diameter, making it difficult to maintain a constant gap between the probe and the pipe wall, thus affecting the stability and accuracy of the detection signal. Simultaneously, existing support devices often suffer from high frictional resistance and unstable operation when moving within the pipeline, making it difficult for operators to accurately control the probe position when probing long distances. Furthermore, existing detection devices have shortcomings in signal transmission cable management; the cables lack effective guidance and protection during pushing and pulling, easily becoming tangled or damaged, leading to interruptions in the detection work. Therefore, how to provide a probe support device that can adapt to multiple pipe diameters, operate smoothly, is easy to operate, and provides cable protection is a current technical challenge that needs to be solved. Utility Model Content

[0003] Existing technologies for micromagnetic detection inside pipelines suffer from the problem of probes being unable to adapt to variations in pipe diameter. Due to the complex internal environment of pipelines, diameter deviations are common, and different pipe specifications are often interconnected. Conventional fixed supports cannot guarantee that the probe remains aligned with the pipeline's central axis, leading to decreased accuracy of the detection signal. Furthermore, the manual pushing control method in existing technologies is inconvenient and results in uneven force distribution when dealing with long pipelines. Additionally, the probe signal transmission cable is directly exposed inside the pipeline, making it highly susceptible to wear, scratches, and even entanglement from the pipeline wall, severely impacting the continuity of the detection operation and the safety of the equipment. Therefore, this invention aims to provide a micromagnetic detection probe support that effectively solves the aforementioned technical problems by using an adaptive support sliding component with radial telescopic function and a control component with long-distance flexible pushing function.

[0004] This invention provides a micromagnetic detection probe bracket, comprising a bracket tube, an adaptive support sliding assembly, and a control assembly. The bracket tube serves as an integral support component, with its front end fixedly connected to the micromagnetic detection probe. The bracket tube is made of a non-magnetic material to avoid interference with the micromagnetic detection signal. A probe signal transmission cable is connected to the rear end of the micromagnetic detection probe, passing through a cavity in the middle of the bracket tube and extending out from the rear end. The control assembly is installed at the end of the bracket tube furthest from the micromagnetic detection probe, with the probe signal transmission cable passing through its interior. Multiple sets of the adaptive support sliding assemblies are arranged on the outer circumferential surface of the bracket tube. The uniform distribution of these circumferential sets ensures the alignment of the bracket tube within the pipe.

[0005] Furthermore, the support tube is a hollow cylindrical tube structure with a connecting flange or threaded interface at its front end for mounting the probe. The probe signal transmission cable maintains a straight path inside the support tube to reduce cable sway during movement. The control component includes a control guide spring seat and a control guide spring. The control guide spring seat is tubular, with one end detachably fixed to the rear end of the support tube via a threaded pair or set screw for easy maintenance of the internal cable. The other end of the control guide spring seat is fixedly connected to one end of the control guide spring by welding or physical snap-fit. The probe signal transmission cable passes sequentially through the internal channel of the control guide spring seat and the central helical cavity of the control guide spring. The total axial length of the control guide spring is greater than the length of a single section of the pipe being tested, ensuring that the operator can push the support deep into the pipe from outside by manipulating the spring. The physical length of the probe signal transmission cable is greater than the axial length of the control guide spring to allow sufficient redundancy for connection to external testing equipment.

[0006] Specifically, the adaptive support sliding components are radially distributed on the outer circumferential wall of the support tube, with three or more groups, preferably four groups distributed at a 90-degree angle, to provide omnidirectional radial support force. Each group of the adaptive support sliding components includes a guide wheel support front rod, a guide wheel lifting push rod, a guide wheel lifting movable ring, a guide wheel lifting spring seat, a guide wheel lifting spring, a guide wheel support rear rod, a guide wheel connecting rod, and a guide wheel. The first end of the guide wheel support front rod is rotatably connected to the front outer wall of the support tube via a first pin, and the second end of the guide wheel support front rod is rotatably connected to the first end of the guide wheel connecting rod and the guide wheel located in front via a second pin. The first end of the guide wheel support rear rod is rotatably connected to the rear outer wall of the support tube via a third pin, and the second end of the guide wheel support rear rod is rotatably connected to the second end of the guide wheel connecting rod and the guide wheel located behind via a fourth pin. The guide wheel support front rod, the guide wheel support rear rod, the guide wheel connecting rod, and the corresponding tube section of the support tube together form a parallelogram linkage mechanism in geometric space. This structure ensures that the guide wheel connecting rod remains parallel to the central axis of the support tube when it swings with the linkage mechanism.

[0007] The first end of the guide wheel lifting push rod is rotatably connected to the middle section of the guide wheel support front rod via a fifth pin, and the second end of the guide wheel lifting push rod is rotatably connected to the outer wall of the guide wheel lifting movable ring via a sixth pin. The guide wheel lifting movable ring is sleeved on the outer wall of the support tube, and the inner diameter of the guide wheel lifting movable ring is slightly larger than the outer diameter of the support tube, thus forming a sliding fit pair, allowing the guide wheel lifting movable ring to reciprocate linearly along the axial direction of the support tube. The guide wheel lifting spring seat is sleeved on the outer wall of the support tube and located behind the guide wheel lifting movable ring, and the guide wheel lifting spring seat is fixed to the support tube by a set screw. The guide wheel lifting spring is sleeved on the outside of the support tube, and the two ends of the guide wheel lifting spring abut against the rear end face of the guide wheel lifting movable ring and the front end face of the guide wheel lifting spring seat, respectively. The guide wheel lifting spring is in a pre-compressed state, and its elasticity pushes the guide wheel lifting movable ring to move forward, thereby driving the entire parallelogram linkage mechanism to expand radially outward through the guide wheel lifting push rod.

[0008] Furthermore, the guide wheel has a specific geometric shape, with its contact surface being an arc-shaped concave surface matching the curvature of the pipe's inner wall. An anti-slip texture is machined on this concave surface to increase stability and frictional driving force during sliding within the pipe. A sealed bearing is installed inside the guide wheel to prevent dust or moisture from entering the bearing and affecting rotational flexibility. The lengths of the guide wheel support front rod and the guide wheel support rear rod are equal, and the length of the guide wheel connecting rod is equal to the distance between the two rotating connection points on the support tube body, thus strictly ensuring the parallelogram geometric characteristics. When the support enters pipes of different diameters, the pipe's inner wall exerts radial inward pressure on the guide wheel. This pressure is transmitted through the guide wheel connecting rod and the guide wheel support front rod to the guide wheel lifting push rod. The guide wheel lifting push rod overcomes the elastic force of the guide wheel lifting spring and pushes the guide wheel lifting movable ring to slide backward, causing the entire linkage mechanism to contract, thereby achieving adaptive adjustment to changes in pipe diameter.

[0009] In one embodiment, the operation procedure of the micro-magnetic detection probe holder includes the following steps:

[0010] S1. Based on the material characteristics and testing requirements of the pipeline to be tested, the micro-magnetic detection probe is firmly installed on the support pipe body through the front-end interface, and the probe signal transmission cable is passed through the inside of the support pipe body, the inside of the control guide spring seat, and the spiral cavity of the control guide spring in sequence, and finally connected to the signal acquisition terminal.

[0011] S2. Align the front end of the assembled bracket with the pipe opening, manually hold the control guide spring and apply a pushing force to the inside of the pipe. At this time, the guide wheel of the adaptive support sliding component contacts the pipe opening. Under the squeezing action of the inner wall of the pipe, the guide wheel drives the linkage mechanism to contract inward. The guide wheel lifting and moving ring overcomes the resistance of the guide wheel lifting spring and moves backward, so that multiple guide wheels fit tightly against the inner wall of the pipe.

[0012] S3. Continuously push inward by controlling the guide spring. Since the guide spring has a certain rigidity, it can effectively transmit the thrust to the support tube. At the same time, its flexibility allows the support to pass through the curved tube section. During this process, the parallelogram linkage mechanism ensures that the micro magnetic detection probe is always at the geometric center of the pipe for data acquisition.

[0013] S4. After the inspection task is completed, the entire support device is smoothly pulled out of the pipe by manipulating the guide spring. During the pulling process, the spiral structure of the guide spring acts as a physical barrier for the internal probe signal transmission cable, preventing the cable from directly rubbing against the pipe opening or the inner wall of the pipe, and protecting the structural integrity of the cable.

[0014] The beneficial effects of this utility model are:

[0015] By employing a parallelogram linkage mechanism consisting of a guide wheel supporting the front rod, a guide wheel supporting the rear rod, a guide wheel connecting rod, and the support tube, the micro-magnetic detection probe support achieves the technical effect that the guide wheel connecting rod remains parallel to the axis during radial extension and retraction. This ensures the axial alignment of the micro-magnetic detection probe under different pipe diameters, greatly improving the stability and consistency of the detection signal. Simultaneously, through the coordinated operation of the guide wheel lifting spring, the guide wheel lifting movable ring, and the guide wheel lifting push rod, the support can automatically adjust its support height based on the pressure feedback from the inner wall of the pipe, adapting to varying pipe diameters without manual intervention and enhancing the device's throughput capacity. Furthermore, the control guide spring not only solves the power transmission problem for long-distance pushing but also provides full-length physical protection for the signal cable through its unique helical hollow structure, effectively preventing cable wear and damage under complex working conditions and extending the equipment's service life. These specific structural features work together to give this invention significant practical value and technical advantages in the field of non-destructive testing of pipelines.

[0016] Furthermore, the sliding contact surface between the guide wheel lifting ring and the support tube is treated to reduce friction, for example, by coating with polytetrafluoroethylene or by installing a self-lubricating bushing, to reduce sliding resistance and make the radial adaptive adjustment process more sensitive and smooth. The control guide spring is made of high-strength spring steel, and its surface is covered with a wear-resistant rubber layer, which not only increases the feel during operation but also further improves the wear resistance when moving inside the pipe. The inner wall of the central cavity of the support tube is provided with a cable management ring to fix the position of the probe signal transmission cable and prevent the cable from accumulating in the pipe. The fixed position of the guide wheel lifting spring seat on the support tube can be adjusted axially as needed, thereby changing the initial preload of the guide wheel lifting spring to adapt to the different support requirements of the inner wall of the pipe made of different materials.

[0017] Specifically, both the front and rear guide wheel support rods feature a hollow, weight-reducing design, lowering the overall weight of the device while maintaining mechanical strength, thus reducing the workload of operators. The length of the guide wheel connecting rod is designed to be between one-third and one-half of the total length of the support tube, ensuring a sufficiently wide support coverage. The outer wall of the control guide spring seat tube has a knurled structure, facilitating manual assembly and disassembly. The probe signal transmission cable has a stress-relieving joint at the end where it exits the control guide spring, preventing breakage at the exit point during frequent bending.

[0018] Each pivot joint of the adaptive support sliding assembly is equipped with a washer and a cotter pin to ensure the reliability of the connection under severe movement or vibration within the pipeline. The width of the guide wheel is set according to the minimum diameter of the pipe being measured, ensuring that there is no mechanical interference between adjacent guide wheels when the guide wheel is retracted to its minimum state. The rear end face of the support tube is equipped with an anti-collision rubber pad, which provides a buffering effect during retraction. The helical pitch of the control guide spring is optimized to ensure sufficient axial thrust transmission while maintaining good radial bending performance, allowing it to smoothly pass through pipe bends with a certain radius of curvature. Through the above detailed structural design, this utility model provides a micro-magnetic detection probe support that is structurally stable, easy to operate, highly adaptive, and has cable protection functions. Attached Figure Description

[0019] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of one side of the structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the other side of the structure of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Support tube body; 2. Micro-magnetic detection probe; 3. Probe signal transmission cable; 4. Control guide spring seat; 5. Control guide spring; 6. Guide wheel support front rod; 7. Guide wheel lifting push rod; 8. Guide wheel lifting movable ring; 9. Guide wheel lifting spring seat; 10. Guide wheel lifting spring; 11. Guide wheel support rear rod; 12. Guide wheel connecting rod; 13. Guide wheel. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0025] like Figure 1-3As shown: This utility model provides a micro-magnetic detection probe bracket, the core structure of which includes a bracket tube 1, an adaptive support sliding assembly, and a control assembly. The bracket tube 1 serves as the main skeleton of the entire device, undertaking the functions of supporting the detection element and connecting various motion mechanisms. The bracket tube 1 is made of non-magnetic material, specifically high-strength nylon or austenitic stainless steel, to eliminate the interference of metallic magnetism on the micro-magnetic detection signal. The length of the bracket tube 1 is set according to the bending radius of the pipe to be tested, and its outer diameter is smaller than the minimum nominal inner diameter of the pipe to be tested, thereby reserving sufficient space for arranging the adaptive support sliding assembly.

[0026] The front end of the support tube 1 is provided with an internal threaded interface or a flange connection plate for fixed connection with the micro magnetic detection probe 2. The micro magnetic detection probe 2 integrates a high-sensitivity magnetic sensor array, and the probe signal transmission cable 3 extending from its rear end passes through the central cavity of the support tube 1. The inner wall of the support tube 1 is provided with multiple fixed pulleys or cable management rings, and the probe signal transmission cable 3 is linearly distributed inside the support tube 1 to reduce resistance during cable pushing. The probe signal transmission cable 3 extends from the rear end of the support tube 1 and passes through the internal channel of the control component.

[0027] The control component is installed at the end of the support tube 1 furthest from the micromagnetic detection probe 2. Its specific structure includes a control guide spring seat 4 and a control guide spring 5. The control guide spring seat 4 is a hollow tubular structure, with one end detachably connected to the rear end of the support tube 1 via a threaded connection. This connection method facilitates maintenance or replacement of the internal cables after the testing task. The other end of the control guide spring seat 4 is machined with an annular groove, and one end of the control guide spring 5 is fixed to the control guide spring seat 4 by a fastening ring or welding. The control guide spring 5 is made of high-strength spring steel wire, and its surface is covered with a 1-2 mm thick wear-resistant polyethylene protective layer. The inner diameter of the spiral of the control guide spring 5 is larger than the outer diameter of the probe signal transmission cable 3, so that the probe signal transmission cable 3 is located at the central axis of the control guide spring 5. The length of the control guide spring 5 is designed to be 3 to 10 meters, which is greater than the maximum single-segment length of the tested tube, thereby enabling the operator to push the support over long distances from outside the tube. Because the control guide spring 5 has radial flexibility and axial rigidity, it will bend compliantly when passing through the bend section, and at the same time effectively transmit the axial thrust to the support tube 1.

[0028] Four sets of adaptive support sliding components are evenly arranged around the periphery of the support tube 1. These four sets of components are distributed at 90-degree intervals in the circumferential direction. Each set of adaptive support sliding components includes a guide wheel support front rod 6, a guide wheel lifting push rod 7, a guide wheel lifting movable ring 8, a guide wheel lifting spring seat 9, a guide wheel lifting spring 10, a guide wheel support rear rod 11, a guide wheel connecting rod 12, and a guide wheel 13.

[0029] The first end of the guide wheel support front rod 6 is rotatably connected to the front section of the support tube 1 via a first pin. The second end of the guide wheel support front rod 6 is rotatably connected to the first end of the guide wheel connecting rod 12 and the guide wheel 13 located in front via a second pin. The first end of the guide wheel support rear rod 11 is rotatably connected to the rear section of the support tube 1 via a third pin. The second end of the guide wheel support rear rod 11 is rotatably connected to the other end of the guide wheel connecting rod 12 and the guide wheel 13 located behind via a fourth pin. The length of the guide wheel support front rod 6 is exactly equal to the length of the guide wheel support rear rod 11, and the length of the guide wheel connecting rod 12 is exactly equal to the axial distance from the center of the first pin to the center of the third pin on the support tube 1. Through this geometric limitation, the guide wheel support front rod 6, the guide wheel support rear rod 11, the guide wheel connecting rod 12, and the support tube 1 constitute a standard parallelogram linkage mechanism. When the parallelogram linkage mechanism oscillates radially, the guide wheel linkage 12 always remains parallel to the central axis of the support tube 1. This motion characteristic ensures that the guide wheels 13 installed at both ends of the guide wheel linkage 12 can simultaneously contact the inner wall of the pipe, thereby ensuring the axial alignment accuracy of the micro magnetic detection probe 2 inside the pipe.

[0030] The first end of the guide wheel lifting push rod 7 is rotatably connected to the middle section of the guide wheel support front rod 6 via a fifth pin, and the second end of the guide wheel lifting push rod 7 is rotatably connected to the outer wall of the guide wheel lifting movable ring 8 via a sixth pin. The guide wheel lifting movable ring 8 is sleeved on the outer wall of the support tube 1, and its inner diameter is clearance-fitted with the outer diameter of the support tube 1, with the clearance controlled between 0.1 mm and 0.3 mm. The inner wall of the guide wheel lifting movable ring 8 is coated with a polytetrafluoroethylene anti-friction layer, which allows the guide wheel lifting movable ring 8 to smoothly slide along the axial direction of the support tube 1.

[0031] The guide wheel lifting spring seat 9 is fixed to the support tube 1 by a set screw and is located behind the guide wheel lifting movable ring 8. The guide wheel lifting spring 10 is sleeved on the outside of the support tube 1, with its two ends abutting against the rear end face of the guide wheel lifting movable ring 8 and the front end face of the guide wheel lifting spring seat 9, respectively. The guide wheel lifting spring 10 is in a pre-compressed state, and the elastic force it generates is transmitted to the linkage mechanism through the guide wheel lifting movable ring 8 and the guide wheel lifting push rod 7, driving the guide wheel connecting rod 12 to expand radially outward until the guide wheel 13 is tightly fitted against the inner wall of the pipe.

[0032] The guide wheel 13 is made of wear-resistant rubber material, and its outer circumference is machined with anti-slip horizontal grooves to increase rolling stability on the pipe wall. A double-row sealed ball bearing is installed at the center of the guide wheel 13 to prevent moisture and impurities from the pipe from entering the bearing. The radial cross-section of the guide wheel 13 is arc-shaped, and the radius of curvature of this arc matches the inner wall curvature of the pipe to be tested, thereby increasing the contact area and reducing local pressure.

[0033] The specific operating principle and process of this utility model are as follows:

[0034] When the operator holds the control guide spring 5 and pushes the front end of the bracket into the pipe opening, the guide wheel 13 first contacts the edge of the pipe. Since the pipe diameter is usually smaller than the outer diameter of the adaptive support sliding assembly in its fully expanded state, the inner wall of the pipe will exert an inward radial pressure on the guide wheel 13. This pressure is transmitted to the guide wheel lifting push rod 7 through the guide wheel connecting rod 12 and the guide wheel support front rod 6. The guide wheel lifting push rod 7 decomposes this force into an axial component, pushing the guide wheel lifting movable ring 8 to move backward, thereby further compressing the guide wheel lifting spring 10. As the compression of the guide wheel lifting spring 10 increases, its reaction force also increases, so that the guide wheels 13 in all four directions abut against the inner wall of the pipe with a constant pressure.

[0035] During the pushing process, if the pipe diameter narrows or there are local weld beads, the guide wheel 13 will sense the increase in radial pressure, and the linkage mechanism will automatically retract inward to guide the support tube 1 to pass smoothly. Conversely, when the pipe diameter increases, the released energy of the guide wheel lifting spring 10 will push the linkage mechanism to expand outward, always keeping the support tube 1 at the geometric center of the pipe. This adaptive adjustment process is achieved entirely by the mechanical feedback of the mechanical structure itself, without the need for an external power source or a complex control system.

[0036] The specific testing procedure is as follows:

[0037] S1. Preparation Stage: Based on the material and wall thickness of the pipe to be tested, select the matching micro-magnetic detection probe 2 and install it at the front end of the support pipe body 1 via a threaded connection. Pass the probe signal transmission cable 3 sequentially through the support pipe body 1, the control guide spring seat 4, and the central channel of the control guide spring 5, and finally connect the aviation plug at the end of the cable to the external micro-magnetic detector host.

[0038] S2, Pipe Insertion Stage: Align the front end of the support with the opening of the pipe to be tested. The operator holds the control guide spring 5 and applies axial thrust into the pipe. At this time, the four sets of adaptive support sliding components contract synchronously under the compression of the inner wall of the pipe, and the guide wheel 13 begins to roll on the inner wall of the pipe. The operator judges the movement status of the support through the feedback sensory feedback of the control guide spring 5.

[0039] S3. Detection Phase: The control guide spring 5 is continuously and uniformly pushed, causing the micro-magnetic detection probe 2 to move within the pipe. During this process, the parallelogram linkage mechanism ensures that the lift-off distance between the probe and the pipe wall remains constant. The micro-magnetic detector host receives and records the magnetic field strength change data collected by the probe in real time for subsequent defect identification and analysis.

[0040] S4. Retrieval Phase: Once the support reaches the predetermined inspection depth, the operator pulls the control guide spring 5 in the opposite direction. Because the control guide spring 5 provides full-cycle physical shielding for the internal cables, the cables will not experience severe friction with the pipe opening. Under the pulling force, the support smoothly exits the pipe, completing this inspection operation.

[0041] Furthermore, to improve the reliability of the device in complex environments, the surface of the support tube 1 undergoes hard anodizing treatment to enhance its corrosion resistance. The guide wheel lifting spring seat 9 has multiple adjustment holes at its axial fixed position on the support tube 1, allowing the operator to adjust the initial compression of the guide wheel lifting spring 10 as needed, thereby adjusting the support force of the guide wheel 13 on the pipe wall. When inspecting soft plastic pipes, the preload can be appropriately reduced to prevent scratching the pipe wall. When inspecting industrial pipes with oil contamination, the preload can be increased to ensure that the guide wheel 13 does not slip.

[0042] Specifically, both the front guide wheel support rod 6 and the rear guide wheel support rod 11 adopt an I-shaped cross-section design. This structure achieves maximum weight reduction while ensuring bending strength, thus reducing physical exertion during long-distance pushing. The length of the guide wheel connecting rod 12 is designed to be half the total length of the support tube 1. This large-span support structure can effectively suppress pitch vibration of the support during movement.

[0043] The control guide spring 5 has a helical pitch of 5 to 8 millimeters, which ensures both efficient thrust transmission and good flexibility. At the end of the control guide spring 5, a stress-relieving sleeve made of elastic rubber is provided. This sleeve has an inner diameter that gradually increases from the inside out, effectively alleviating the bending stress of the probe signal transmission cable 3 at the outlet and preventing metal fatigue fracture caused by frequent bending.

[0044] Each pin connection point of the adaptive support sliding assembly is equipped with a self-lubricating bushing made of oil-impregnated bronze, which enables long-term low-friction operation without the need for external grease. The front end face of the guide wheel lifting ring 8 is machined with a dustproof bevel, which can push away floating dust that falls on the surface of the support tube 1 during sliding, preventing impurities from entering the sliding pair and causing jamming.

[0045] In practical applications, such as internal inspection of long-distance oil pipelines, where scaling or deformation may exist inside the pipeline, this invention utilizes the proportional expansion and contraction characteristics of the parallelogram linkage mechanism to ensure extremely high consistency of the signals acquired by the micro-magnetic detection probe 2. Even in areas where the pipeline bends at 90 degrees, the control guide spring 5 can smoothly guide the thrust to the front end of the support along the curvature of the bend, avoiding the problem of traditional rigid push rods easily becoming clogged at bends.

[0046] Furthermore, since the probe signal transmission cable 3 is completely enclosed within the physical channel formed by the support tube 1 and the control guide spring 5, it does not come into contact with the inner wall of the pipe during the entire detection process. This structural design completely solves the technical problem of the cable being cut by the sharp edge of the pipe wall or the detection being interrupted due to entanglement. The outer wall of the control guide spring seat 4 is also processed with knurled texture, which allows operators to perform loading and unloading operations securely while wearing protective gloves.

[0047] This invention, through the aforementioned specific mechanical structure design, achieves a micro-magnetic detection probe bracket with high self-adaptability, long-distance operation stability, and all-around cable protection, significantly improving the efficiency and data reliability of pipeline non-destructive testing. During the switching between different pipe diameters, the power feedback loop formed by the guide wheel lifting spring 10, the guide wheel lifting movable ring 8, and the guide wheel lifting push rod 7 enables the device to respond to pipe diameter changes in real time, ensuring continuous flexible contact between the support mechanism and the pipe wall.

[0048] A hemispherical anti-collision pad is also installed on the rear end face of the support tube 1. During the retrieval process, if the support impacts the external support frame of the pipe due to inertia, the pad will deform to absorb the impact energy, protecting the internal electronic components from damage. The guide wheel 13 is designed with a width of 15 mm to 25 mm to ensure that it will not get stuck in the weld groove when passing through the pipe weld, maintaining the continuity of movement.

[0049] In summary, the specific embodiments of this utility model, through detailed linkage geometry design, spring mechanical balance design, and cable protection design, provide a high-performance pipeline inspection auxiliary device. The connection relationships between the components are clearly defined, and the motion logic is clear, capable of meeting the needs of micro-magnetic pipeline inspection under various complex working conditions. After reading this embodiment, those skilled in the art can make targeted optimizations and adjustments to the length of each linkage, the stiffness of the spring, and the selection of materials according to specific pipeline parameters; all such adjustments fall within the protection scope of this utility model.

[0050] The technical solution of this utility model is not limited to the specific embodiments described above. All technical modifications made based on the technical solution of this utility model shall fall within the protection scope of this utility model.

Claims

1. A micro-magnetic detection probe holder, characterized in that: The device includes a support tube (1), an adaptive support sliding assembly, and a control assembly. The front end of the support tube (1) is fixedly connected to a micro magnetic detection probe (2). The probe signal transmission cable (3) connected to the micro magnetic detection probe (2) is located in the middle of the support tube (1). The other end of the micro magnetic detection probe (2) is connected to the control assembly. The probe signal transmission cable (3) passes through the control assembly. Multiple sets of the adaptive support sliding assemblies are arranged around the support tube (1).

2. The micromagnetic detection probe holder according to claim 1, characterized in that: The control assembly includes a control guide spring seat (4) and a control guide spring (5). The control guide spring seat (4) is a tubular structure. One end of the control guide spring seat (4) is detachably and fixedly connected to the other end of the support tube (1). The other end of the control guide spring seat (4) is fixedly connected to one end of the control guide spring (5). The probe signal transmission cable (3) passes through the control guide spring seat (4) and the control guide spring (5). The length of the control guide spring (5) is greater than the length of the tube being tested. The length of the probe signal transmission cable (3) is greater than the length of the control guide spring (5).

3. The micromagnetic detection probe holder according to claim 1, characterized in that: The adaptive support sliding components are in three or more groups.

4. The micromagnetic detection probe holder according to claim 3, characterized in that: The adaptive support sliding assembly includes a guide wheel support front rod (6), a guide wheel lifting push rod (7), a guide wheel lifting movable ring (8), a guide wheel lifting spring seat (9), a guide wheel lifting spring (10), a guide wheel support rear rod (11), a guide wheel connecting rod (12), and a guide wheel (13). One end of the guide wheel support front rod (6) is rotatably connected to the front section of the support tube (1), and the other end of the guide wheel support front rod (6) and one end of the guide wheel connecting rod (12) are simultaneously rotatably connected to a guide wheel (13). One end of the guide wheel lifting push rod (7) is rotatably connected to the middle section of the guide wheel support front rod (6), and the other end of the guide wheel lifting push rod (7) is connected to the guide wheel lifting movable ring (8). The outer side of the guide wheel is rotatably connected. The guide wheel lifting ring (8) is sleeved on the outside of the support tube (1) and can slide. The guide wheel lifting spring seat (9) is sleeved on the outside of the support tube (1) and is fixedly connected to the support tube (1). The guide wheel lifting spring (10) is sleeved on the outside of the support tube (1), and the two ends of the guide wheel lifting spring (10) are located between the guide wheel lifting ring (8) and the guide wheel lifting spring seat (9). One end of the guide wheel support rear rod (11) is rotatably connected to the rear section of the support tube (1). The other end of the guide wheel support rear rod (11) is rotatably connected to the other end of the guide wheel connecting rod (12) and another guide wheel (13).

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