Nondestructive testing device for internal defects of hydraulic rod

Abstract

The invention relates to the technical field of hydraulic rod detection, in particular to a hydraulic rod internal defect nondestructive detection device which comprises a detection table, a clamping seat and a probing seat in sliding connection with the detection table, a mounting pipe is mounted on the probing seat, and a circular probing plate is arranged at the end, away from the probing seat, of the mounting pipe. A plurality of probes are arranged on the side edge of the probing plate in a sliding mode in the circumferential direction of the probing plate, and the probes are distributed around the axis of the probing plate in a circumferential array mode, and according to the nondestructive testing device for the internal defects of the hydraulic rod, the probing plate is driven to move and drive the probes to move in a cylinder barrel of the hydraulic rod; the probe can generate telescopic displacement according to recesses and protrusions on the inner wall of the cylinder barrel, whether defects exist or not is judged according to the telescopic displacement, the probe can generate telescopic displacement according to the recesses and protrusions on the inner wall of the cylinder barrel, the direct physical contact mode enables the detection result to have extremely high precision, and compared with a non-contact detection method, the detection accuracy is greatly improved. And the probe detection can more accurately capture tiny defects on the inner wall of the cylinder barrel.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of hydraulic rod detection, in particular to a nondestructive testing device for internal defects of a hydraulic rod. BACKGROUND

[0002] The hydraulic rod is a core execution element in a hydraulic transmission system, and functions to realize linear reciprocating motion through hydraulic pressure. The hydraulic rod is widely applied to engineering machinery, the automobile industry, aerospace and the like. The hydraulic rod is mainly composed of a cylinder barrel, a piston, a piston rod and a sealing system. The cylinder barrel is a key component for bearing high-pressure liquid, and the internal quality of the cylinder barrel directly affects the reliability and service life of the hydraulic system. In the production and use process of the cylinder barrel, internal cracks, pores, inclusions or surface scratches may be generated due to factors such as material defects, processing errors or improper heat treatment. Such defects may cause leakage, pressure loss or even cylinder rupture under high-pressure working conditions, resulting in equipment failure or safety hazards. Therefore, the cylinder barrel needs to be strictly subjected to nondestructive testing after manufacturing to ensure the integrity and reliability of the internal structure of the cylinder barrel.

[0003] In the prior art, endoscopic detection is used for detecting internal defects of the hydraulic rod cylinder barrel. However, the traditional endoscopic detection method generally has the problems of low efficiency and complicated operation. The operator needs to have high professional skills and rich experience to ensure that the probe can accurately reach the detection position and obtain clear images. Meanwhile, the angle and position of the probe need to be constantly adjusted during the detection process, and the operation process is relatively complex and time-consuming. In addition, after detecting defects, the traditional method is difficult to quickly locate the defect area. Since the position and range of the defects cannot be accurately determined, the subsequent repair work often lacks pertinence. This not only increases the maintenance cost, but also may cause unnecessary damage to the normal structure of the cylinder barrel, further affecting the overall performance and service life of the hydraulic rod cylinder barrel. Meanwhile, the overall maintenance efficiency is reduced, and the difficulty of cost control is increased. Therefore, the application provides a nondestructive testing device for internal defects of a hydraulic rod. SUMMARY

[0004] One technical problem to be solved by the application is that the traditional detection method generally has the problems of low efficiency and complicated operation, and it is difficult to quickly locate the defect area. Since the position and range of the defects cannot be accurately determined, the subsequent repair work often lacks pertinence. This not only increases the maintenance cost, but also may cause unnecessary damage to the normal structure of the cylinder barrel.

[0005] To solve the above technical problems, the embodiment of the present application provides a kind of hydraulic rod internal defect nondestructive testing device, including detection table, clamping seat and with the sliding connection of detection table, the probe seat is installed on the detection table, the installation pipe is installed on the probe seat, the round probe plate is provided at the end of the installation pipe away from the probe seat, the side edge of the probe plate is slidably provided with a plurality of probes along its circumference, and the probes are distributed in a circumferential array around the probe plate axis, a probe unit is provided on the probe seat and connected with the probe plate and the probe, to drive the probe plate to move and drive the probe to move in the hydraulic cylinder, and the probe can produce telescopic displacement according to the concave and convex of the inner wall of the cylinder, and the existence of defect is judged by the telescopic displacement, a defect positioning unit is provided on the probe seat, and the defect position and type detected in the cylinder are marked and positioned using the defect positioning unit.

[0006] In some embodiments, the probe unit includes a detection member provided on the probe plate, which drives the probe to detect defects on the inner wall of the cylinder, and a pressure member is provided on the probe plate to detect the pressure change when the probe is displaced.

[0007] In some embodiments, the detection member includes a plurality of guide grooves opened on the probe plate, a positioning plate is provided in the guide groove, the positioning plate is slidably connected with the probe, a piston plate one is slidably connected with the guide groove and provided on the probe, and an extrusion spring is provided on the probe between the piston plate one and the positioning plate.

[0008] In some embodiments, the pressure member includes a gas pressure cavity one opened in the probe plate, the gas pressure cavity one is communicated with the guide groove, a gas pressure cavity two is opened in the probe plate, a gas hole is opened in the gas pressure cavity two and communicated with the guide groove, the gas hole is located on the side of the piston plate away from the gas pressure cavity one in the guide groove, a communication pipe is provided on the gas pressure cavity one and the gas pressure cavity two and communicated with the cavity, a gas pressure sensor is provided in the communication pipe, a stop block is provided in the guide groove and located on the side of the positioning plate away from the piston plate one, and a gas pressure plate is slidably provided in the guide groove and located on the side of the stop block away from the positioning plate.

[0009] In some embodiments, the defect positioning unit includes a marking member provided on the probe seat to mark the defect position of the cylinder, a pushing member is provided in the communication pipe to provide working power for the marking member, a switching member is provided on the pushing member to drive the marking member to output different color marks according to the defect type of the cylinder, and the switching member is connected with a power member to provide power for the working of the switching member.

[0010] In some embodiments, the marker comprises a ring-shaped plate I arranged on the probe seat, the ring-shaped plate I is connected with the mounting pipe, a ring-shaped plate II is coaxially nested inside the ring-shaped plate I, a plurality of extension pipes are arranged along the circumferential direction of the side edges of the ring-shaped plate I and the ring-shaped plate II, a plurality of induction cavities are arranged on the ring-shaped plate I and the ring-shaped plate II, the plurality of induction cavities are respectively communicated with the plurality of extension pipes, a push plate is arranged in the extension pipe, a piston plate II is slidingly arranged in the extension pipe, a marker rod is arranged on the side of the piston plate II away from the push plate, a color block is arranged at the end of the marker rod, the color blocks on the marker rods in the extension pipes inside the ring-shaped plate I and the ring-shaped plate II are different in color, a clamping plate is arranged in the extension pipe, the clamping plate is slidingly connected with the marker rod, and a pushing spring is sleeved on the marker rod between the piston plate II and the clamping plate.

[0011] In some embodiments, the pushing member comprises an isolation plate arranged in the communication pipe, an electric push rod is arranged on the isolation plate, the end of the electric push rod is slidingly connected with the piston plate III, and the probe seat is respectively provided with a pressure chamber I and a pressure chamber II connected with the communication pipe.

[0012] In some embodiments, the switching member comprises a plurality of through pipes arranged on the pressure chamber I and the pressure chamber II, the plurality of through pipes are respectively communicated with the plurality of induction cavities, an extension rod is rotationally arranged on the through pipe, a blocking block is arranged at one end of the extension rod in the through pipe, the blocking block is semispherical, and a steering gear is arranged at the other end of the extension rod outside the through pipe.

[0013] In some embodiments, the power member comprises a fixed plate arranged in the mounting pipe, a plurality of sliding rods are slidingly arranged on the fixed plate, a limiting plate is arranged on the sliding rod, a return spring is sleeved on the sliding rod between the limiting plate and the fixed plate, a pushing groove is arranged on the probe plate, an extrusion block is arranged at one end of the probe in the pushing groove, a trigger plate is arranged at one end of the sliding rod, the trigger plate is Z-shaped, the trigger plate is in contact with the extrusion block, a switching rack is arranged at the other end of the sliding rod and engaged with the steering gear, the switching rack is initially located between the two steering gears, and the steering gears are respectively connected with the through pipes and the extension rods on the pressure chamber I and the pressure chamber II.

[0014] In some embodiments, the end of the probe is provided with an oval ball head, and the ball head is subjected to chrome plating treatment.

[0015] The present application has at least the following advantages:

[0016] 1. By driving the probe plate to move and drive the probe to move in the hydraulic rod cylinder, and the probe can produce telescopic displacement according to the concave and convex of the inner wall of the cylinder, and the existence of defects is judged by the telescopic displacement, the probe can produce telescopic displacement according to the concave and convex of the inner wall of the cylinder, and the detection result has very high precision, compared with non-contact detection method, such as optical detection or ultrasonic detection, the probe detection can more accurately capture the small defects of the inner wall of the cylinder, and by driving the probe plate to move and drive the probe to move in the cylinder, a rapid and continuous detection process can be realized, compared with manual detection or point-by-point detection method, the automatic detection method greatly improves the detection efficiency.

[0017] 2. The defect positioning unit is used to position the corresponding position on the outer surface of the cylinder according to the position of the defect in the cylinder detected by the probe, which is convenient for subsequent repair, and different color marks can be output by the marking element according to the type of the defect of the cylinder, the color marks of the concave and convex defects are different, which is convenient for subsequent repair processing, and through the defect positioning unit, the position of the defect in the cylinder detected by the probe can be accurately positioned on the outer surface of the cylinder, which avoids the tediousness and error of manual searching for the position of the defect, significantly improves the efficiency of the repair work, and the accurate positioning reduces the repair error caused by misjudgment of the position of the defect, ensures the accuracy and effectiveness of the repair work, and the different color marks output by the marking element according to the type of the defect of the cylinder, especially the different color marks of the concave and convex defects, enable the repair personnel to intuitively identify the type of the defect, so as to select the appropriate repair method and tool, the marking function simplifies the repair processing flow, and the repair personnel need not judge the type of each defect in detail, but can quickly start the repair work according to the color of the mark. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the application;

[0019] Figure 2 It is a schematic diagram of the structure of the probe unit and the defect positioning unit of the application;

[0020] Figure 3 It is a schematic diagram of the structure of the installation pipe and the power element of the application;

[0021] Figure 4 It is a schematic diagram of the structure of the installation pipe and the power element of the application; Figure 3 It is a schematic diagram of the structure of the installation pipe and the power element of the application;

[0022] Figure 5 It is a schematic diagram of the structure of the installation pipe and the power element of the application;

[0023] Figure 6 It is a schematic diagram of the structure of the installation pipe and the power element of the application;

[0024] Figure 7Schematic diagram of the probe structure of the present application Figure 6 Schematic diagram of the B zone amplification structure of the present application

[0025] Figure 8 Schematic diagram of the probe structure of the present application

[0026] Figure 9 Schematic diagram of the probe plate cross-sectional structure of the present application

[0027] Figure 10 Schematic diagram of the ring plate one and ring plate two structure of the present application

[0028] Figure 11 Schematic diagram of the switching piece structure of the present application

[0029] Figure 12 Schematic diagram of the marking piece structure of the present application

[0030] Figure 13 Schematic diagram of the ring plate one and ring plate two cross-sectional structure of the present application

[0031] Figure 14 Schematic diagram of the second embodiment of the present application

[0032] In the figure: 1, detection table; 2, clamping seat; 3, probe seat; 4, mounting pipe; 5, probe plate; 6, probe; 7, probe unit; 8, detection piece; 81, through groove; 82, positioning plate; 83, piston plate one; 84, extrusion spring; 9, pressure piece; 91, air pressure cavity one; 92, air pressure cavity two; 93, communication pipe; 94, air hole; 95, air pressure sensor; 10, defect positioning unit; 11, marking piece; 111, ring plate one; 112, ring plate two; 113, extension pipe; 114, induction cavity; 115, push plate; 116, marking rod; 117, piston plate two; 118, clamping plate; 119, pushing spring; 12, pushing piece; 121, isolation plate; 122, electric push rod; 123, piston plate three; 124, pressure chamber one; 125, pressure chamber two; 13, switching piece; 131, through pipe; 132, blocking block; 133, extension rod; 134, steering gear; 14, power piece; 141, fixed plate; 142, sliding rod; 143, limiting plate; 144, return spring; 145, pushing groove; 146, extrusion block; 147, trigger plate; 148, switching rack; 15, ball head. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] Embodiment 1: please refer to Figures 1-13 The application provides a technical scheme: a hydraulic rod internal defect nondestructive testing device, comprising a detection table 1, a clamping seat 2 and a detection seat 3 which is in sliding connection with the detection table 1, characterized in that: the detection seat 3 is provided with a mounting pipe 4, the mounting pipe 4 is provided with a circular detection plate 5 at the end away from the detection seat 3, a plurality of probes 6 are arranged on the side edge of the detection plate 5 in a sliding manner along the circumference, and the probes 6 are distributed in a circumferential array around the axis of the detection plate 5, the detection seat 3 is provided with a detection unit 7 connected with the detection plate 5 and the probes 6, so as to drive the detection plate 5 to move and drive the probes 6 to move in the hydraulic rod cylinder, and the probes 6 can produce extension and retraction displacement according to the concave and convex of the inner wall of the cylinder, and the existence of defects can be judged according to the extension and retraction displacement, and the detection seat 3 is provided with a defect positioning unit 10, which is used for marking and positioning the position and type of the detected defects in the cylinder.

[0035] The detection unit 7 comprises a detection member 8 arranged on the detection plate 5, which is used for driving the probes 6 to detect the defects of the inner wall of the cylinder, and the detection plate 5 is provided with a pressure member 9, which is used for detecting the pressure change when the probes 6 displace.

[0036] The detection member 8 comprises a plurality of through grooves 81 formed in the detection plate 5, and a positioning plate 82 is arranged in each through groove 81, the positioning plate 82 is in sliding connection with the probe 6, a piston plate one 83 is arranged on the probe 6 and in sliding connection with the through groove 81, and an extrusion spring 84 is arranged on the probe 6 and located between the piston plate one 83 and the positioning plate 82.

[0037] When detecting the internal defects of the cylinder, the detection plate 5 is driven to move, thereby driving the probes 6 to move in the cylinder, when the probes 6 encounter the protrusions in the cylinder during the movement, the probes 6 are extruded to drive the piston plate to simultaneously apply pressure to the extrusion spring 84, and when the probes 6 encounter the recesses, the probes 6 are extruded from the through grooves 81 under the pushing of the extrusion spring 84.

[0038] The pressure piece 9 comprises a gas pressure cavity I 91 opened in the probe plate 5, which is communicated with the through groove 81, a gas pressure cavity II 92 is opened in the probe plate 5, a gas hole 94 communicated with the through groove 81 is opened in the gas pressure cavity II 92, and the gas hole 94 is located on the side of the piston plate away from the gas pressure cavity I 91 in the through groove 81, and the gas pressure cavity I 91 and the gas pressure cavity II 92 are both provided with a communication pipe 93 communicated with the cavity, the communication pipe 93 is provided with a gas pressure sensor 95, the through groove 81 is provided with a stop block, the stop block is located on the side of the positioning plate 82 away from the piston plate 83, and the gas pressure plate is slidably arranged in the through groove 81 and located on the side of the stop block away from the positioning plate 82.

[0039] When the probe 6 drives the piston plate to retract, the gas pressure plate is simultaneously extruded to move in the through groove 81, the movement of the gas pressure plate compresses the gas in the gas pressure cavity, so that the pressure in the gas pressure cavity I 91 becomes larger, and when the probe 6 drives the piston plate 83 to extend, the gas in the through groove 81 is pushed from the gas hole 94 to the gas pressure cavity II 92 by the piston plate 83, so that the pressure in the gas pressure cavity II 92 becomes larger, and since the gas pressure sensor 95 is arranged in the gas pressure cavity I 91 and the gas pressure cavity II 92, the existence of defects in the cylinder can be judged through the change of gas pressure, and the gas hole is opened between the stop block and the positioning plate 82 in the through groove 81, so that the through groove 81 can be communicated with the outside, thereby ensuring that the piston plate 83 can complete the compression of the gas in the gas pressure cavity II 92 when the probe 6 extends.

[0040] The probe 6 can sensitively sense the small defects such as protrusions and recesses by directly contacting the inner wall of the cylinder, when encountering a protrusion, the probe 6 is extruded to drive the piston plate to press the extrusion spring 84, and when encountering a recess, the probe 6 extends under the action of the spring, and this mechanical response mechanism ensures high sensitivity of detection, and the extension and retraction of the probe 6 drives the piston plate to move in the through groove 81, thereby compressing or releasing the gas in the gas pressure cavity, causing the change of gas pressure, the gas pressure sensor 95 can accurately measure these changes, and convert the mechanical displacement into quantifiable gas pressure signal, thereby improving the accuracy and reliability of defect detection, and the automatic detection process reduces the need for manual intervention, reduces labor cost, and improves the consistency and accuracy of detection, and the through groove 81 is communicated with the outside through the gas hole, thereby ensuring that the piston plate can complete the compression of the gas in the gas pressure cavity II 92 when the probe 6 extends, and the gas pressure balance in the gas pressure cavity I 91 is maintained, this design avoids detection errors or equipment failures caused by abnormal gas pressure, finally by adjusting the length, diameter of the probe 6 and the sensitivity of the gas pressure sensor 95 and other parameters, this design can adapt to the detection requirements of cylinders of different sizes and shapes.

[0041] The defect positioning unit 10 comprises a marking member 11 arranged on the probe seat 3 and used for marking the position of the cylinder defect; the communicating pipe 93 is internally provided with a pushing member 12 for providing working power for the marking member 11; the pushing member 12 is internally provided with a switching member 13 for driving the marking member 11 to output different color marks according to the type of the cylinder defect; the switching member 13 is connected with a power member 14 for providing power for the working of the switching member 13.

[0042] The marking member 11 comprises an annular plate one 111 arranged on the probe seat 3 and connected with the mounting pipe 4, the annular plate one 111 is coaxially nested with an annular plate two 112 on the inner side, a plurality of extension pipes 113 are arranged on the side of the annular plate one 111 and the annular plate two 112 along the circumferential direction, a plurality of induction cavities 114 are arranged on the annular plate one 111 and the annular plate two 112, the plurality of induction cavities 114 are respectively communicated with the plurality of extension pipes 113, a pushing plate 115 is arranged in the extension pipe 113, a piston plate two 117 is slidingly arranged in the extension pipe 113, a marking rod 116 is arranged on the side of the piston plate two 117 away from the pushing plate 115, color blocks are mounted on the end of the marking rod 116, the color blocks on the marking rod 116 in the extension pipe 113 in the annular plate one 111 and the annular plate two 112 are different in color, a clamping plate 118 is arranged in the extension pipe 113, the clamping plate 118 is slidingly connected with the marking rod 116, a pushing spring 119 is sleeved on the marking rod 116 between the piston plate two 117 and the clamping plate 118, a protective shell covering the extension pipe 113 is arranged on the probe seat 3 for avoiding damage to the pipe.

[0043] When the gas flows into the extension pipe 113 in the corresponding position through the induction cavity 114, the air pressure in the extension pipe 113 becomes larger, thereby pushing the piston plate two 117 to move in the extension pipe 113, further driving the marking rod 116 on the piston plate two 117 and the color blocks on the end of the marking rod 116 to contact with the surface of the cylinder, thereby leaving marks on the surface of the cylinder, the color blocks on the marking rod 116 in the communicating pipe 93 connected with different air pressure cavities are different in color, thereby being able to judge the type of the defect according to the color of the color blocks.

[0044] By equipping the marking rod 116 connected to different air pressure cavities with color blocks of different colors, the design can intuitively distinguish different types of defects (such as protrusions and depressions). This color coding allows the repair personnel to quickly identify the type of defect without additional judgment or measurement steps. Once the gas flows into the extension pipe 113 and pushes the piston plate two 117 to move, the marking rod 116 and the color block will immediately come into contact with the cylinder surface and leave an imprint. This immediate marking function ensures the quick recording of the defect position, improving the detection efficiency. Since different colors of color blocks correspond to different types of defects, repair personnel can more accurately determine the type of defect and thus select the appropriate repair method and tool, reducing repair errors caused by misjudgment. The automated marking process reduces the need for manual intervention, reducing labor costs. At the same time, due to the improvement in accuracy and efficiency of marking, additional costs caused by repair errors are also reduced.

[0045] The pusher 12 includes an isolation plate 121 arranged in the communication pipe 93, and an electric push rod 122 is arranged on the isolation plate 121, and a piston plate three 123 is arranged at the end of the electric push rod 122 and is in sliding connection with the communication pipe 93. The probe seat 3 is respectively provided with a pressure chamber one 124 and a pressure chamber two 125 connected with the communication pipe 93.

[0046] When the air pressure sensor 95 detects a change in pressure, the electric push rod 122 in the communication pipe 93 is controlled to work, and the stroke of the electric push rod 122 is controlled by the size of the pressure change. The electric push rod 122 works to push the piston plate three 123 to move in the communication pipe 93, thereby extruding the gas in the communication pipe 93 and pushing the gas in the communication pipe 93 into the pressure chamber one 124 and the pressure chamber two 125, respectively. After the air pressure sensor 95 detects a change in pressure, the electric push rod 122 is automatically controlled to work, and the stroke of the electric push rod 122 is controlled by the size of the pressure change, realizing the automation of the detection and marking process and improving the detection efficiency.

[0047] The switching piece 13 includes a plurality of through pipes 131 arranged on the pressure chamber one 124 and the pressure chamber two 125, and the plurality of through pipes 131 are respectively connected with the plurality of sensing cavities 114. An extension rod 133 is rotatably arranged on the through pipe 131, and a blocking block 132 is arranged at one end of the extension rod 133 in the through pipe 131. The blocking block 132 is semispherical, and a steering gear 134 is arranged at one end of the extension rod 133 outside the through pipe 131.

[0048] The power member 14 comprises a fixed plate 141 arranged in the mounting pipe 4, a plurality of sliding rods 142 are arranged on the fixed plate 141 in a sliding mode, a limiting plate 143 is arranged on the sliding rod 142, a reset spring 144 is arranged on the sliding rod 142 between the limiting plate 143 and the fixed plate 141, a pushing groove 145 is arranged on the probe plate 5, an extrusion block 146 is arranged on the probe 6 in the pushing groove 145, a trigger plate 147 is arranged at one end of the sliding rod 142, the trigger plate 147 is Z-shaped, the trigger plate 147 is in contact with the extrusion block 146, a switching rack 148 is arranged at the other end of the sliding rod 142 and engaged with the steering gear 134, and the switching rack 148 is initially located in the middle of the two steering gears 134, and the steering gears 134 are respectively connected with the through pipe 131 and the extension rod 133 on the pressure chamber one 124 and the pressure chamber two 125.

[0049] After high pressure is formed in the pressure chamber one 124 and the pressure chamber two 125, the gas is pushed to flow into the induction cavity 114 in the corresponding annular plate one 111 and annular plate two 112 through the through pipe 131, and then flows into the extension pipe 113 through the induction cavity 114. While the probe 6 moves axially, the extrusion block 146 located thereon pushes the trigger plate 147 in contact therewith to move. When the probe 6 at the corresponding position encounters a protrusion, the trigger plate 147 cooperating therewith is pushed to rise, and when the probe 6 at the corresponding position encounters a recess, the trigger plate 147 is driven to descend under the pushing of the reset spring 144. The trigger plate 147 is driven to rise, and the sliding rod 142 and the switching rack 148 at the end of the sliding rod 142 are driven to rise, and are engaged with the steering gear 134 on the through pipe 131 communicated with the pressure chamber one 124, so as to push the steering gear 134 to rotate, thereby driving the blocking block 132 to rotate, and the sealing of the through pipe 131 is released, so that the gas flows into the induction cavity 114 at the corresponding position through the through pipe 131, thereby pushing the marking rod 116 corresponding to the moving position of the probe 6 to drive the color block to descend and contact the surface of the cylinder barrel. Similarly, when the trigger plate 147 is driven to descend, the sliding rod 142 and the switching rack 148 at the end of the sliding rod 142 are driven to descend, thereby driving the marking rod 116 corresponding to the moving position of the probe 6 to drive the color block to descend and contact the surface of the cylinder barrel, so as to distinguish different defects. Meanwhile, the design can quickly switch the marking of the defect type.

[0050] When the probe 6 moves axially, the precise correspondence between the position of the probe 6 and the position of the marking rod 116 is achieved through the cooperation of the extrusion block 146 and the trigger plate 147. When the probe 6 detects a defect, it can accurately mark the corresponding position on the surface of the cylinder. By raising or lowering the trigger plate 147, the switching rack 148 is engaged with the steering gear 134, thereby controlling the movement of the marking rod 116 of different colors. Different types of defects such as protrusions and recesses will trigger different colored markings, allowing repair personnel to visually distinguish defect types. The entire detection and marking process is automated, reducing manual intervention and improving detection efficiency. The high-pressure gas in the gas chamber automatically pushes the gas flow, and the action of the trigger plate 147 and the marking rod 116 is also automatically completed by the mechanical structure. Once the probe 6 detects a defect, the trigger plate 147 will immediately respond and drive the marking rod 116 to act, leaving a mark on the surface of the cylinder. This fast response speed helps to promptly discover and handle defects.

[0051] The mechanical components such as the trigger plate 147, the sliding rod 142, the switching rack 148, and the steering gear 134 are designed reasonably and have stable structure, and can withstand long-term working load without being easily damaged. Through the design of the gas chamber and the through pipe 131, precise control of gas flow is achieved. This gas pressure control method not only improves the accuracy of marking, but also enhances the stability of the system.

[0052] Embodiment 2: Please refer to Figure 14 The present application provides a technical solution: the probe 6 is provided with an oval ball head 15 at the end, and the ball head 15 is treated by chromium plating. Compared with the sharp or flat probe 6 end, the oval ball head 15 can disperse the pressure when contacting the inner wall of the cylinder, reduce the local contact stress, avoid scratching or damaging the inner wall of the cylinder, and at the same time ensure the stable contact of the probe 6 with the inner wall of the cylinder. The oval ball head 15 can better adapt to the curved shape of the inner wall of the cylinder, ensuring that the probe 6 can uniformly and stably adhere to the inner wall of the cylinder during detection, improving the accuracy and reliability of detection. The chromium plating layer has high hardness and wear resistance, which can effectively protect the probe 6 and the ball head 15 from wear and tear, prolonging the service life of the probe 6. The chromium plating layer can form a dense oxide film to prevent corrosive media such as oxygen and moisture from contacting the probe 6 substrate, thereby improving the corrosion resistance of the probe 6 and ensuring stable detection performance in harsh environments. The chromium plating treatment can make the surface of the probe 6 ball head 15 smoother, reduce the friction resistance with the inner wall of the cylinder, and improve the sensitivity and accuracy of detection.

[0053] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting, since the scope of the present application will be limited to the appended claims. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be apparent to one of ordinary skill in the art that many embodiments of the application can be made without departing from the spirit or scope of the application. Numerous specific details are described in order to provide a thorough understanding of the embodiments of the application. However, it will be apparent to one of ordinary skill in the art that embodiments of the present application can be practiced without many of these specific details. In other instances, well-known methods, procedures and components have not been described in detail so as not to unnecessarily obscure aspects of the embodiments of the application. In an effort to provide a concise description of these embodiments, the terms "including", "containing" or "comprising", and variations thereof, do not inherently mean that the enumerated

[0054] While the embodiments of the application have been shown and described herein, it will be understood by those of ordinary skill in the art that many modifications, changes, replacements, and variations can be made to the embodiments without departing from the spirit and scope of the application.

Claims

1. A nondestructive testing device for internal defects of a hydraulic rod, comprising a testing platform (1), a clamping seat (2), and a probing seat (3) slidably connected to the testing platform (1), characterized in that: The detection seat (3) is provided with a mounting tube (4), and a circular detection plate (5) is provided at one end of the mounting tube (4) away from the detection seat (3). A plurality of probes (6) are provided on the side of the detection plate (5) for sliding along its circumferential direction, and the probes (6) are distributed in a circumferential array around the axis of the detection plate (5). The detection seat (3) is provided with a detection unit (7) connected to the detection plate (5) and the probes (6), for driving the detection plate (5) to move and driving the probes (6) to move in the hydraulic rod cylinder, and the probes (6) can generate telescopic displacement according to the depression and protrusion of the inner wall of the cylinder, and judge whether a defect exists or not by the amount of the telescopic displacement. The detection seat (3) is provided with a defect positioning unit (10), and the defect positioning unit (10) is used to mark and locate the position and type of the detected defect in the cylinder.

2. The nondestructive testing device for internal defects of hydraulic rods according to claim 1, characterized in that: The detection unit (7) includes a detection member (8) arranged on the detection plate (5), and the detection member (8) is used to drive the probe (6) to detect defects on the inner wall of the cylinder. The detection plate (5) is provided with a pressure member (9), and the pressure member (9) is used to detect the pressure change generated when the probe (6) is displaced.

3. The nondestructive testing device for internal defects of hydraulic rods according to claim 2, characterized in that: The detection member (8) includes a plurality of conducting grooves (81) provided on the detection plate (5), a positioning plate (82) is provided in the conducting grooves (81), the positioning plate (82) is slidably connected to the probe (6), a piston plate (83) slidably connected to the conducting grooves (81) is provided on the probe (6), and an extrusion spring (84) is sleeved between the piston plate (83) and the positioning plate (82) on the probe (6).

4. The nondestructive testing device for internal defects of hydraulic rods according to claim 3, characterized in that: The pressure member (9) includes an air pressure chamber (91) provided in the probe plate (5), the air pressure chamber (91) being connected to the conducting groove (81), an air pressure chamber (92) being provided on the probe plate (5), an air pressure chamber (94) being provided in the air pressure chamber (92) being connected to the conducting groove (81), and the air pressure chamber (94) being located on the side of the piston plate in the conducting groove (81) away from the air pressure chamber (91), the air pressure chamber (91) and the air pressure chamber (92) being both provided with a connecting pipe (93) connected to the cavity, an air pressure sensor (95) being provided in the connecting pipe (93), a stopper being provided in the conducting groove (81), the stopper being located on the side of the positioning plate (82) away from the piston plate (83), an air pressure plate being slidably provided in the conducting groove (81), the air pressure plate being located on the side of the stopper away from the positioning plate (82).

5. The nondestructive testing device for internal defects of hydraulic rods according to claim 4, characterized in that: The defect locating unit (10) comprises a marking member (11) arranged on the detection seat (3) for marking the position of the cylinder defect; a pushing member (12) is provided in the connecting pipe (93) for providing working power for the marking member (11); a switching member (13) is provided on the pushing member (12), and the switching member (13) is used to drive the marking member (11) to output different color marks according to the type of cylinder defect; the switching member (13) is connected to a power member (14) for providing power for the switching member (13) to work.

6. The nondestructive testing device for internal defects of hydraulic rods according to claim 5, characterized in that: The marking member (11) includes an annular plate (111) provided on the detection seat (3), the annular plate (111) is connected to the mounting tube (4), an annular plate (112) is coaxially nested inside the annular plate (111), a plurality of extension tubes (113) are provided along the circumference of the side edges of the annular plate (111) and the annular plate (112), a plurality of sensing cavities (114) are provided on the annular plate (111) and the annular plate (112), the plurality of sensing cavities (114) are respectively communicated with a plurality of extension tubes (113), a push plate (115) is provided in the extension tube (113), and the extension tube (113) is provided with a plurality of push plates (115). 13) is provided with a piston plate 2 (117) slidingly therein, a marking rod (116) is provided on the side of the piston plate 2 (117) away from the push plate (115), a color block is installed on the end of the marking rod (116), and the color blocks on the marking rods (116) in the extension tubes (113) in the annular plate 1 (111) and the annular plate 2 (112) are different in color, a retaining plate (118) is provided in the extension tube (113), the retaining plate (118) is slidably connected to the marking rod (116), and a pushing spring (119) is sleeved on the marking rod (116) between the piston plate 2 (117) and the retaining plate (118).

7. The nondestructive testing device for internal defects of hydraulic rods according to claim 6, characterized in that: The pushing member (12) includes an isolation plate (121) arranged in the connecting pipe (93), an electric push rod (122) is arranged on the isolation plate (121), and a piston plate three (123) is provided at the end of the electric push rod (122) and is slidably connected to the connecting pipe (93). The detection seat (3) is respectively provided with a pressure chamber one (124) and a pressure chamber two (125) connected to the connecting pipe (93).

8. The nondestructive testing device for internal defects of hydraulic rods according to claim 7, characterized in that: The switching member (13) comprises a plurality of conducting tubes (131) arranged on the pressure chamber 1 (124) and the pressure chamber 2 (125), the plurality of conducting tubes (131) being respectively connected to the plurality of sensing chambers (114), an extension rod (133) being rotatably arranged on the conducting tube (131), a blocking block (132) being arranged at one end of the extension rod (133) located inside the conducting tube (131), the blocking block (132) being hemispherical, and a steering gear (134) being arranged at one end of the extension rod (133) located outside the conducting tube (131).

9. The nondestructive testing device for internal defects of hydraulic rods according to claim 8, characterized in that: The power member (14) includes a fixed plate (141) arranged in the mounting tube (4), a plurality of sliding rods (142) are slidably arranged on the fixed plate (141), a limiting plate (143) is arranged on the sliding rod (142), a return spring (144) is sleeved on the sliding rod (142) between the limiting plate (143) and the fixed plate (141), a pushing groove (145) is provided on the detection plate (5), and a section of the probe (6) located in the pushing groove (145) is provided with an extrusion block (146), and the A trigger plate (147) is provided at one end of the sliding rod (142). The trigger plate (147) is Z-shaped and contacts the extrusion block (146). A switching rack (148) is provided at the other end of the sliding rod (142) and is engaged with the steering gear (134). The switching rack (148) is initially located between the two steering gears (134). The steering gears (134) are respectively connected to the conducting pipe (131) and the extension rod (133) on the pressure chamber 1 (124) and the pressure chamber 2 (125).

10. The nondestructive testing device for internal defects of hydraulic rods according to claim 1, characterized in that: An elliptical ball head (15) is provided at the end of the probe (6), and the ball head (15) is chrome-plated.

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