Defect marking device for elbow detection

Abstract

The invention discloses a defect marking device for bent pipe detection, and relates to the technical field of defect marking devices for bent pipe detection.The defect marking device for bent pipe detection comprises a bottom plate, a paint storage box is fixed to the upper surface of the bottom plate, a fixing device is fixed to the upper surface of the bottom plate, and a supporting plate penetrates through the bottom plate; and rolling wheels penetrate through the bottom plate of the supporting plate, and the penetrating positions of the rolling wheels are rotationally connected with the bottom plate of the supporting plate. According to the defect marking device for elbow detection, by arranging the knocking device, when an elbow is detected, a first hinge rod is driven to move, a knocking block is pushed to slide, and a first sliding block, a second spring and a guide block are matched, so that the knocking block knocks a supporting plate when sliding; the support plate drives the components above the support plate and the bent pipe to shake, sundries possibly existing on the outer wall of the bent pipe are shaken off, the sundries are prevented from being attached to the bent pipe, and the equipment misjudges the sundries as defects and marks the defects during detection.

Description

Technical Field

[0001] The present invention relates to the technical field of defect marking devices for detecting bent pipes, and in particular to a defect marking device for detecting bent pipes. Background Art

[0002] Bend pipes are widely used in many fields such as petroleum, chemical industry, electric power, aerospace, etc. For example, in the oil pipeline system, bend pipes are used to change the direction of the pipeline so that the oil can be transported in complex terrain and equipment layout according to the designed route; in the fuel system of aircraft engines, bend pipes transport fuel from the fuel tank to various parts of the engine, and their quality directly affects the performance and safety of the engine. During the manufacturing and use of bend pipes, due to various factors such as uneven material quality, processing defects, stress in the use environment, etc., defects such as cracks, dents, corrosion, etc. may occur.

[0003] A defect marking device for pipeline detection with patent announcement number CN218157494U includes a base, the upper end of which is fixedly connected with a detection component, a paint storage box and a drive seat, the detection component includes a symmetrically arranged fixed plate, the fixed plate is semi-annular, the outer surface of the fixed plate is fixedly connected with a telescopic component, the outer surface of the telescopic component is sleeved with a spring, one end of the telescopic component is connected to a pressure sensor, and the pressure sensor detects the change in the elastic force of the spring; the defect marking device for pipeline detection detects the outer wall of the pipeline through two fixed plates, so that the protrusion at the defect of the pipeline squeezes the fixed plate, forcing the fixed plate to transmit the pressure to the pressure sensor, and the pressure sensor is used in conjunction with the control module to timely determine the defect position of the pipeline, and a number of balls embedded in the fixed plate can reduce the friction between the pipeline and the fixed plate, so that the pipeline moves more smoothly.

[0004] However, the above-mentioned equipment can only detect straight pipes, and has many inconveniences in detecting curved pipes. Moreover, the equipment is relatively rigid during detection and cannot intelligently judge whether the protrusions on the outer wall of the pipe are debris or defects, which can easily lead to misjudgment and marking when detecting the pipe. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a defect marking device for detecting bent pipes, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a defect marking device for bent pipe detection, comprising a base plate, a paint storage box is fixed on the upper surface of the base plate, a paint inlet is opened on the upper surface of the paint storage box, a controller is fixed on the side wall of the paint storage box, a fixing device is fixed on the upper surface of the base plate, the fixing device comprises a bracket, an output roller and an adjustment knob, the bracket is fixedly connected to the upper surface of the base plate, the output roller passes through the bracket and is rotatably connected at the penetration point, the adjustment knob is fixedly connected to the right end of the output roller, a support plate passes through the base plate and is slidably connected at the penetration point, a roller passes through the support plate and is rotatably connected at the penetration point, the roller is driven to rotate by a motor, a sliding block passes through the side wall of the support plate and is slidably connected at the penetration point, a pressure sensor is fixed to the side wall of the sliding block, and the pressure sensor is away from one end of the sliding block A telescopic rod is fixed to the side wall, the telescopic rod passes through the first spring, and the penetration is fitted, a fixing plate is fixed to the end of the telescopic rod away from the pressure sensor, the outer wall of the fixing plate is fixedly connected to one end of the first spring, the other end of the first spring is fixedly connected to the pressure sensor, the pressure sensor and the controller are electrically connected, the pressure sensor 6 transmits an electrical signal to the controller after being squeezed, the controller and the paint storage box are electrically connected, and the controller controls the paint storage box 2 to start after receiving the electrical signal, a pump body is arranged inside the paint storage box, the pump body is fixedly connected to the bottom end of the paint spraying pipe, a spray head is fixed to the top end of the paint spraying pipe, a knocking device for improving the accuracy of paint spraying is arranged on the side wall of the support plate, an adjustment device for assisting in adjusting the spray head is arranged on the side wall of the support plate, and a locking device for forcibly stopping the roller from rolling when marking is performed is arranged on the side wall of the fixing plate;

[0007] Among them, the knocking device includes a first slider, a second spring, a first hinged rod, a knocking block, a guide block, a second hinged rod, an L-shaped plate, gear teeth and a saw plate. The first slider is slidably connected to the side wall of the support plate, and one end of the second spring is fixedly connected to a side wall of the first slider away from the support plate.

[0008] According to the above technical solution, one end of the first hinged rod is hinged to the side wall of the support plate, and when the support plate 4 slides, it drives the first hinged rod 93 to slide forward. A knocking block is fixed to the end of the second spring away from the first slider, and the other end of the first hinged rod is hinged to the knocking block. When the first hinged rod 93 slides forward, it pushes the knocking block 94 to slide forward. Guide blocks are fixed to the upper surface of the base plate, and the guide blocks are arranged in an array along the side wall of the base plate.

[0009] According to the above technical solution, the side wall of the paint storage box close to the support plate is hinged to the bottom end of the second hinged rod, the end of the sliding block away from the pressure sensor is rotatably connected to the L-shaped plate, the upper end of the second hinged rod is hinged to the side wall of the L-shaped plate, and the second hinged rod pulls the L-shaped plate to slide downward when the support plate slides, the gear teeth are arranged in a circular array on the outer wall of the pressure sensor, the saw plate is fixedly connected to the side wall of the upper end of the support plate, the saw plate is meshed with the gear teeth, and the pressure sensor also rotates when it slides downward.

[0010] According to the above technical solution, the adjustment device includes a mounting plate, a gear, a chain, a support rod, a splint, a connecting block, a third hinge rod and a dredging plate. The mounting plate is fixedly connected to the side wall of the support plate, and a rotating shaft is fixed to the side wall of the mounting plate.

[0011] According to the above technical solution, the rotating shaft passes through the gear and is rotatably connected at the penetration point. The gear is meshed with the inner wall of the chain. When the chain rotates, it drives the gear to rotate. The inner wall of the chain is meshed with the gear teeth. The support rod is fixedly connected to a side wall of the gear away from the rotating shaft. One end of the support rod away from the gear is fixedly connected to the outer wall of the splint. When the support rod rotates with the gear, it drives the splint to rotate together.

[0012] According to the above technical solution, the connecting block passes through the fixed plate and is fixedly connected at the penetration point. The bottom surface of the connecting block is hinged to the upper end of the third hinged rod. When the connecting block moves, it drives the third hinged rod to rotate. The bottom end of the third hinged rod is hinged to the upper surface of the dredging plate. When the third hinged rod rotates, it drives the dredging plate to move, and the outer wall of the dredging plate is in contact with the inner wall of the nozzle.

[0013] According to the above technical solution, the locking device includes a push rod, a second slider, a connecting rod, a fourth spring, a fifth spring and a limit block. The push rod is fixedly connected to the end of the telescopic rod away from the fixed plate. The push rod passes through the support plate. When the telescopic rod moves, it drives the push rod to slide, and the penetration point is slidably connected.

[0014] According to the above technical solution, a third spring is fixed to a side wall of the support plate away from the telescopic rod, and one end of the third spring away from the support plate is fixedly connected to the second slider, the second slider is slidably connected to the inner wall of the L-shaped plate, and the top rod pushes the second slider to slide when it slides. A sliding groove is provided on the side wall of the support plate, and the connecting rod is slidably connected to the inner wall of the sliding groove, and the second slider pushes the connecting rod to slide when it slides.

[0015] According to the above technical solution, the bottom surface of the connecting rod is fixedly connected to the upper end of the fourth spring, the bottom end of the fourth spring is fixedly connected to the bottom surface of the sliding groove, the bottom surface of the connecting rod is fixedly connected to the upper end of the fifth spring, and when the connecting rod slides, it drives the fifth spring to move, the outer wall of the fifth spring fits the inner wall of the fixed plate, the bottom end of the fifth spring is fixedly connected to the upper surface of the limit block, and when the fifth spring moves, it drives the limit block to move, and a limit hole is provided on the outer wall of the roller.

[0016] The present invention provides a defect marking device for detecting bent pipes, which has the following beneficial effects:

[0017] (1) The present invention sets a knocking device. When inspecting the bent pipe, the first hinged rod is driven to move, the knocking block is pushed to slide, and then the first slider, the second spring and the guide block are cooperated to make the knocking block knock on the support plate when sliding, so that the support plate drives the components and the bent pipe above it to shake, and the debris that may exist on the outer wall of the bent pipe is shaken off to avoid the debris adhering to the bent pipe, so that the device misjudges the debris as a defect and marks it during inspection; while the support plate slides, the second hinged rod is cooperated to drive the L-shaped plate to slide downward, and when the L-shaped plate slides downward, it drives the pressure sensor to slide downward together, and drives the gear teeth to rotate by meshing with the saw plate on the side wall of the support plate, drives the pressure sensor to rotate, and makes the pressure sensor drive the telescopic rod and the fixed plate to rotate, so that the fixed plate is more adapted to the curvature of the bent pipe, and avoids the fixed plate and the bent pipe from scratching during the moving inspection, thereby damaging the fixed plate, and easily getting stuck at the corner, causing misjudgment.

[0018] (2) The present invention sets an adjustment device. When performing detection, the gear is driven by a chain to rotate together with the pressure sensor, so that the nozzle and the fixed plate are always in a vertical state, so as to avoid that when a defect is detected, the angle between the nozzle and the elbow is changed, so that the paint cannot be accurately sprayed on the defect of the elbow, and the error between the marked location and the defect is too large; when a defect is detected, the connecting block is driven by the fixed plate to move, so that the third hinge rod is rotated, and the dredging plate is driven to move up and down inside the nozzle to dredge the inside of the nozzle, so as to avoid that the nozzle is blocked during marking, resulting in the inability to mark.

[0019] (3) The present invention sets a locking device. When a defect on the bent pipe is detected, an electrical signal is transmitted to the controller through the pressure sensor. The controller controls the motor to stop, so that the roller stops rotating. If the roller does not stop on time, the second slider is pushed to slide by the push rod, driving the connecting rod to slide downward, so that the limit block is against the outer wall of the roller. When the roller continues to rotate until the limit hole is aligned with the limit block, the limit block is inserted into the limit hole in cooperation with the fifth spring, forcibly stopping the roller to prevent the support plate from continuing to slide forward, making the marked position too large and affecting subsequent work. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a partial structural schematic diagram of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the striking device of the present invention;

[0023] Figure 4 For the present invention Figure 3 A schematic diagram of the local enlarged structure of area A;

[0024] Figure 5 It is a schematic diagram of a partial cross-sectional structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the adjustment device of the present invention;

[0026] Figure 7 For the present invention Figure 6 A schematic diagram of the local enlarged structure of area B;

[0027] Figure 8 It is a schematic diagram of the structure of the locking device of the present invention.

[0028] In the figure: 1, bottom plate; 2, paint storage box; 3, fixing device; 4, support plate; 5, roller; 6, pressure sensor; 7, fixing plate; 8, paint spray tube; 9, knocking device; 91, first slider; 92, second spring; 93, first hinged rod; 94, knocking block; 95, guide block; 96, second hinged rod; 97, L-shaped plate; 98, gear teeth; 99, saw plate; 10, adjustment device; 101, mounting plate; 102, gear; 103, chain; 104, support rod; 105, clamping plate; 106, connecting block; 107, third hinged rod; 108, dredging plate; 11, locking device; 111, top rod; 112, second slider; 113, connecting rod; 114, fourth spring; 115, fifth spring; 116, limit block. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-Figure 8One embodiment of the present invention is: a defect marking device for bent pipe detection, comprising a bottom plate 1, a paint storage box 2 is fixed on the upper surface of the bottom plate 1, a paint inlet is opened on the upper surface of the paint storage box 2, a controller is fixed on the side wall of the paint storage box 2, a fixing device 3 is fixed on the upper surface of the bottom plate 1, the fixing device 3 comprises a bracket, an output roller and an adjustment knob, the bracket is fixedly connected to the upper surface of the bottom plate 1, the output roller passes through the bracket, and the penetration is rotatably connected, the adjustment knob is fixedly connected to the right end of the output roller, and the output roller is adjusted by rotating the adjustment knob , clamp one end of the bent pipe between two groups of output rollers and fix it, a support plate 4 is penetrated in the bottom plate 1, and the penetration is slidably connected, a roller 5 is penetrated in the support plate 4, and the penetration is rotatably connected, the roller 5 is driven to rotate by a motor, and the motor is controlled to be turned on and off by a controller, and when the roller 5 rotates, it drives the support plate 4 to slide forward along the bottom plate 1 to detect the bent pipe, a sliding block is penetrated in the side wall of the support plate 4, and the penetration is slidably connected, a pressure sensor 6 is fixed on the side wall of the sliding block, and the pressure sensor 6 is away from the sliding block. A telescopic rod is fixed to the side wall of the end, and the telescopic rod passes through the first spring, and the penetration is fitted. A fixing plate 7 is fixed to the end of the telescopic rod away from the pressure sensor 6, and the other end of the bent pipe passes through the fixing plate 7. The angle and position of the fixing plate 7 are manually adjusted. The outer wall of the fixing plate 7 is fixedly connected to one end of the first spring, and the other end of the first spring is fixedly connected to the pressure sensor 6. The defect of the bent pipe squeezes the fixing plate 7 when passing through the fixing plate 7. The fixing plate 7 is squeezed and moves to both sides, and the first spring is compressed at the same time. The elastic force of the first spring squeezes the pressure sensor 6. The pressure sensor 6 is electrically connected to the controller. The pressure sensor 6 transmits an electrical signal to the controller after being squeezed. The controller is electrically connected to the paint storage box 2. After receiving the electrical signal, the controller controls the paint storage box 2 to start. The controller is electrically connected to the motor, and the controller controls the motor to stop at the same time. A pump body is arranged inside the paint storage box 2, and the pump body is fixedly connected to the bottom end of the paint spraying pipe 8. A nozzle is fixed to the top of the paint spraying pipe 8. The side wall of the support plate 4 is provided with a knocking device 9 for improving the accuracy of paint spraying.

[0031] The knocking device 9 includes a first slider 91, a second spring 92, a first hinged rod 93, a knocking block 94, a guide block 95, a second hinged rod 96, an L-shaped plate 97, a gear 98 and a saw plate 99. The first slider 91 is slidably connected to the side wall of the support plate 4, one end of the second spring 92 is fixedly connected to a side wall of the first slider 91 away from the support plate 4, one end of the first hinged rod 93 is hinged to the side wall of the support plate 4, and when the support plate 4 slides, the first hinged rod 93 is driven to slide forward, and a knocking block 94 is fixed to one end of the second spring 92 away from the first slider 91. When the knocking block 94 slides in a direction away from the support plate 4, the second spring 92 is stretched. The other end of the first hinge rod 93 is hinged to the knocking block 94. When the first hinge rod 93 slides forward, the knocking block 94 is pushed to slide forward. A guide block 95 is fixed to the upper surface of the bottom plate 1. The guide block 95 is arranged in an array along the side wall of the bottom plate 1. When the knocking block 94 slides forward to contact the guide block 95, it slides along the inclined surface of the guide block 95 in the direction away from the support plate 4. When the knocking block 94 slides to leave the guide block 95, the knocking block 94 is pulled by the second spring 92 to slide toward the support plate 4, knocking the support plate 4, driving the support plate 4 to shake. The side wall of the paint storage box 2 close to the support plate 4 is hinged to the bottom end of the second hinge rod 96. One end of the sliding block away from the pressure sensor 6 and L The type plate 97 is rotatably connected. When the support plate 4 slides forward, it drives the sliding block to move forward together. When the sliding block moves forward, the L-shaped plate 97 moves forward together with the sliding block. The upper end of the second hinged rod 96 is hinged to the side wall of the L-shaped plate 97. When the L-shaped plate 97 moves forward, the distance between the L-shaped plate 97 and the paint storage box 2 becomes larger. The second hinged rod 96 between the L-shaped plate 97 and the paint storage box 2 rotates, pulling the L-shaped plate 97 to move downward. The L-shaped plate 97 drives the sliding block to slide downward, and the sliding block drives the pressure sensor 6 to slide downward. The gear teeth 98 are arranged in a circular array on the outer wall of the pressure sensor 6. The saw plate 99 is fixedly connected to the side wall of the upper end of the support plate 4. The saw plate 99 The gear teeth 98 of the outer wall of the pressure sensor 6 are meshed with the saw plate 99, so the pressure sensor 6 also rotates when sliding downward, and the pressure sensor 6 drives the telescopic rod and the fixed plate 7 to rotate together. When the beating device 9 detects the bent pipe, it drives the first hinge rod 93 to move, pushes the knocking block 94 to slide, and then cooperates with the first slider 91, the second spring 92 and the guide block 95 to make the knocking block 94 knock on the support plate 4 when sliding, so that the support plate 4 drives the components and the bent pipe above it to shake, and shake off the sundries that may exist on the outer wall of the bent pipe to avoid the sundries from adhering to the bent pipe, so that the device can mistakenly judge the sundries as defects and mark them during the detection;When the support plate 4 slides, the second hinge rod 96 drives the L-shaped plate 97 to slide downward. When the L-shaped plate 97 slides downward, it drives the pressure sensor 6 to slide downward together, and drives the gear 98 to rotate by meshing with the saw plate 99 on the side wall of the support plate 4, driving the pressure sensor 6 to rotate, so that the pressure sensor 6 drives the telescopic rod and the fixed plate 7 to rotate, so that the fixed plate 7 is more suitable for the curvature of the curved pipe, avoiding the fixed plate 7 from scratching the curved pipe during the movement for detection, damaging the fixed plate 7, and easily getting stuck at the bend, causing misjudgment. ;

[0032] When this embodiment is working: the output roller is adjusted by turning the adjustment knob, one end of the bent pipe is clamped between the two groups of output rollers and fixed, and the other end of the bent pipe passes through the fixed plate 7. After manually adjusting the angle and position of the fixed plate 7, the motor is started through the controller, and the motor drives the roller 5 to rotate. When the roller 5 rotates, it drives the support plate 4 to slide forward along the bottom plate 1 to detect the bent pipe.

[0033] When the support plate 4 slides, it drives the first hinge rod 93 to slide forward. When the first hinge rod 93 slides forward, it pushes the knocking block 94 to slide forward. When the knocking block 94 slides forward to contact the guide block 95, it slides along the inclined surface of the guide block 95 in the direction away from the support plate 4. Since the first sliding block 91 slides on the side wall of the support plate 4, the knocking block 94 stretches the second spring 92 when sliding in the direction away from the support plate 4. When the knocking block 94 slides to leave the guide block 95, the knocking block 94 is pulled by the second spring 92 to slide toward the support plate 4, knocking the support plate 4, driving the support plate 4 to shake. When the support plate 4 slides forward, The sliding block is driven to move forward. When the sliding block moves forward, the L-shaped plate 97 moves forward with the sliding block. Since the paint storage box 2 is fixed on the upper surface of the bottom plate 1, when the L-shaped plate 97 moves forward, the distance between the L-shaped plate 97 and the paint storage box 2 becomes larger, and the second hinged rod 96 between the L-shaped plate 97 and the paint storage box 2 rotates, pulling the L-shaped plate 97 to move downward, and the L-shaped plate 97 drives the sliding block to slide downward, and the sliding block drives the pressure sensor 6 to slide downward. Since the gear teeth 98 on its outer wall are engaged with the saw plate 99, the pressure sensor 6 also rotates when sliding downward, and the pressure sensor 6 drives the telescopic rod and the fixed plate 7 to rotate together.

[0034] See also Figure 1-Figure 8On the basis of the above embodiment, in another embodiment of the present invention, the side wall of the support plate 4 is provided with an adjustment device 10 for assisting in adjusting the nozzle, and the adjustment device 10 comprises a mounting plate 101, a gear 102, a chain 103, a support rod 104, a clamping plate 105, a connecting block 106, a third hinge rod 107 and a dredging plate 108. The mounting plate 101 is fixedly connected to the side wall of the support plate 4, and a rotating shaft is fixed to the side wall of the mounting plate 101, and the rotating shaft passes through the gear 102, and the penetration is rotatably connected, the gear 102 is meshed with the inner wall of the chain 103, and when the chain 103 rotates, the gear 102 is driven to rotate together, and the chain 1 The inner wall of 03 is meshed with the gear teeth 98. When the gear teeth 98 rotates with the pressure sensor 6, the chain 103 is driven to rotate together. The support rod 104 is fixedly connected to the side of the gear 102 away from the rotating shaft. When the gear 102 rotates, the support rod 104 is driven to rotate together with the pressure sensor 6. The end of the support rod 104 away from the gear 102 is fixedly connected to the outer wall of the clamping plate 105. When the support rod 104 rotates, it drives the clamping plate 105 to rotate. Since the paint spray tube 8 is clamped in the clamping plate 105, the angle of the paint spray tube 8 is driven to change when the clamping plate 105 rotates, so that the nozzle and the fixed plate 7 are always in a vertical state. The connecting block 106 passes through the fixed plate 7 and is fixedly connected at the penetration point. When a defect is detected, the fixed plate 7 is squeezed and moved in the direction of the supporting plate 4, and the fixed plate 7 drives the connecting block 106 to move away from each other. The bottom surface of the connecting block 106 is hinged to the upper end of the third hinged rod 107, and the connecting block 106 drives the third hinged rod 107 to rotate. The bottom end of the third hinged rod 107 is hinged to the upper surface of the dredging plate 108, and the outer wall of the dredging plate 108 is attached to the inner wall of the nozzle. The third hinged rod 107 drives the dredging plate 108 to move in contact with the inner wall of the nozzle, so that the solidified paint that may exist is conducted. The adjustment When the device 10 is conducting detection, the chain 103 drives the gear 102 to rotate together with the pressure sensor 6, so that the nozzle and the fixed plate 7 are always in a vertical state, so as to avoid the angle between the nozzle and the elbow changing when a defect is detected, so that the paint cannot be accurately sprayed on the defect of the elbow, and the error between the marked location and the defect is too large; when a defect is detected, the connecting block 106 is driven to move through the fixed plate 7, so that the third hinge rod 107 is rotated, and the dredging plate 108 is driven to move up and down inside the nozzle to dredge the inside of the nozzle, so as to avoid the nozzle being blocked during marking, resulting in the inability to mark.

[0035] The side wall of the fixed plate 7 is provided with a locking device 11 for forcibly stopping the roller 5 from rolling when marking. The locking device 11 includes a push rod 111, a second slider 112, a connecting rod 113, a fourth spring 114, a fifth spring 115 and a limit block 116. The push rod 111 is fixedly connected to the end of the telescopic rod away from the fixed plate 7. When the fixed plate 7 moves toward the direction of the supporting plate 4, the telescopic rod drives the push rod 111 to move. The push rod 111 penetrates the supporting plate 4 and is slidably connected at the penetration point. A third spring is fixed to a side wall of the supporting plate 4 away from the telescopic rod. The end of the third spring away from the supporting plate 4 and the second slider are connected. The second slider 112 is fixedly connected, the second slider 112 is slidably connected to the inner wall of the L-shaped plate 97, and when the top rod 111 moves to contact the second slider 112, it pushes the second slider 112 to slide in the direction away from the L-shaped plate 97, and the side wall of the support plate 4 is provided with a sliding groove, and the connecting rod 113 is slidably connected to the inner wall of the sliding groove. When the second slider 112 slides in the direction away from the L-shaped plate 97, it pushes the connecting rod 113 to slide downward, and the bottom surface of the connecting rod 113 is fixedly connected to the upper end of the fourth spring 114, and the bottom end of the fourth spring 114 is fixedly connected to the bottom surface of the sliding groove, and the bottom surface of the connecting rod 113 is fixed with The limiting plate, the bottom surface of the connecting rod 113 and the upper end of the fifth spring 115 are fixedly connected, the outer wall of the fifth spring 115 fits the inner wall of the fixing plate 7, the bottom end of the fifth spring 115 and the upper surface of the limiting block 116 are fixedly connected, when the connecting rod 113 slides downward, it drives the fifth spring 115 and the limiting block 116 to move downward, and when the limiting block 116 moves downward to contact the roller 5, it compresses the fifth spring 115, and the outer wall of the roller 5 is provided with a limiting hole. When the limiting hole on the outer wall of the roller 5 is aligned with the limiting block 116, the limiting block 116 is inserted into the limiting hole by the thrust of the fifth spring 115, so that the roller 5 is locked and stopped. When the locking device 11 detects a defect on the bent pipe, it transmits an electrical signal to the controller through the pressure sensor 6. The controller controls the motor to stop, so that the roller 5 stops rotating. If the roller 5 does not stop on schedule, the second slider 112 is pushed to slide by the push rod 111, driving the connecting rod 113 to slide downward, so that the limit block 116 is against the outer wall of the roller 5. When the roller 5 continues to rotate until the limit hole is aligned with the limit block 116, the limit block 116 is inserted into the limit hole in cooperation with the fifth spring 115, and the roller 5 is forcibly stopped to prevent the support plate 4 from continuing to slide forward, making the marked position too large and affecting subsequent work.

[0036] When this embodiment is working: when the gear 98 rotates with the pressure sensor 6, it drives the chain 103 to rotate together, and when the chain 103 rotates, it drives the gear 102 to rotate together, and when the gear 102 rotates, it drives the support rod 104 to rotate together with the pressure sensor 6, and when the support rod 104 rotates, it drives the clamping plate 105 to rotate. Since the paint spray tube 8 is clamped in the clamping plate 105, the angle of the paint spray tube 8 is changed when the clamping plate 105 rotates, so that the nozzle and the fixed plate 7 are always in a vertical state. When a defect is detected, the fixed plate 7 is squeezed and moves toward the direction of the support plate 4, and the fixed plate 7 drives the connecting block 106 to move away from each other, and the connecting block 106 drives the third hinged rod 107 to rotate, and the third hinged rod 107 drives the dredging plate 108 to move in contact with the inner wall of the nozzle to conduct any solidified paint.

[0037] When the fixed plate 7 moves in the direction of the supporting plate 4, the pressure sensor 6 transmits an electrical signal to the controller, and the controller controls the motor to stop, so that the roller 5 stops rotating. At the same time, the telescopic rod drives the push rod 111 to move. When the push rod 111 moves to contact the second sliding block 112, it pushes the second sliding block 112 to slide in the direction away from the L-shaped plate 97. When the second sliding block 112 slides in the direction away from the L-shaped plate 97, it pushes the connecting rod 113 to slide downward. When the connecting rod 113 slides downward, it drives the fifth spring 115 and the limit block 116 to move downward. When the limit block 116 moves downward to contact the roller 5, it compresses the fifth spring 115. If the roller 5 does not stop on schedule, when the limit hole on the outer wall of the roller 5 is aligned with the limit block 116, the limit block 116 is inserted into the limit hole under the thrust of the fifth spring 115, so that the roller 5 is locked and stopped.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A defect marking device for detecting bent pipes, comprising a bottom plate (1), characterized in that: A paint storage box (2) is fixed on the upper surface of the bottom plate (1), a paint inlet is provided on the upper surface of the paint storage box (2), a controller is fixed on the side wall of the paint storage box (2), a fixing device (3) is fixed on the upper surface of the bottom plate (1), the fixing device (3) comprises a bracket, an output roller and an adjustment knob, the bracket is fixedly connected to the upper surface of the bottom plate (1), the output roller passes through the bracket and is rotatably connected at the penetration point, the adjustment knob is fixedly connected to the right end of the output roller, a support plate (4) passes through the bottom plate (1) and is slidably connected at the penetration point, a roller (5) passes through the support plate (4) and is rotatably connected at the penetration point, a sliding block is passed through the side wall of the support plate (4) and is slidably connected at the penetration point, a pressure sensor (6) is fixed to the side wall of the sliding block, and the pressure sensor (6) is away from one end of the sliding block. A telescopic rod is fixed to the side wall, the telescopic rod passes through the first spring and the penetration part is in contact with each other, a fixing plate (7) is fixed to one end of the telescopic rod away from the pressure sensor (6), the outer wall of the fixing plate (7) is fixedly connected to one end of the first spring, the other end of the first spring is fixedly connected to the pressure sensor (6), the pressure sensor (6) and the controller are electrically connected, a pump body is arranged inside the paint storage box (2), the pump body is fixedly connected to the bottom end of the paint spraying pipe (8), a spray head is fixed to the top end of the paint spraying pipe (8), a knocking device (9) for improving the accuracy of paint spraying is arranged on the side wall of the support plate (4), an adjustment device (10) for assisting in adjusting the spray head is arranged on the side wall of the support plate (4), and a locking device (11) for forcibly stopping the roller (5) from rolling when marking is performed is arranged on the side wall of the fixing plate (7); The knocking device (9) comprises a first slider (91), a second spring (92), a first hinged rod (93), a knocking block (94), a guide block (95), a second hinged rod (96), an L-shaped plate (97), a gear (98) and a saw plate (99); the first slider (91) is slidably connected to the side wall of the support plate (4); one end of the second spring (92) is fixedly connected to a side of the first slider (91) away from the support plate (4).

2. A defect marking device for bent pipe detection according to claim 1, characterized in that: One end of the first hinged rod (93) is hinged to the side wall of the support plate (4); a knocking block (94) is fixed to one end of the second spring (92) away from the first sliding block (91); the other end of the first hinged rod (93) is hinged to the knocking block (94); a guide block (95) is fixed to the upper surface of the base plate (1); and the guide blocks (95) are arranged in an array along the side wall of the base plate (1).

3. A defect marking device for bent pipe detection according to claim 2, characterized in that: The side wall of the paint storage box (2) close to the support plate (4) is hinged to the bottom end of the second hinged rod (96); the end of the sliding block away from the pressure sensor (6) is rotatably connected to the L-shaped plate (97); the upper end of the second hinged rod (96) is hinged to the side wall of the L-shaped plate (97); the gear teeth (98) are arranged in a circular array on the outer wall of the pressure sensor (6); the saw plate (99) is fixedly connected to the side wall at the upper end of the support plate (4); and the saw plate (99) is meshed with the gear teeth (98).

4. A defect marking device for bent pipe detection according to claim 1, characterized in that: The adjustment device (10) comprises a mounting plate (101), a gear (102), a chain (103), a support rod (104), a clamping plate (105), a connecting block (106), a third hinge rod (107) and a dredging plate (108); the mounting plate (101) is fixedly connected to the side wall of the support plate (4); and a rotating shaft is fixed to the side wall of the mounting plate (101).

5. A defect marking device for bent pipe detection according to claim 4, characterized in that: The rotating shaft passes through the gear (102) and is rotatably connected at the penetration point. The gear (102) is meshed with the inner wall of the chain (103), and the inner wall of the chain (103) is meshed with the gear teeth (98). The support rod (104) is fixedly connected to a side of the gear (102) away from the rotating shaft, and one end of the support rod (104) away from the gear (102) is fixedly connected to the outer wall of the clamping plate (105).

6. A defect marking device for bent pipe detection according to claim 5, characterized in that: The connecting block (106) passes through the fixed plate (7) and is fixedly connected at the penetration point; the bottom surface of the connecting block (106) is hinged to the upper end of the third hinge rod (107); the bottom end of the third hinge rod (107) is hinged to the upper surface of the dredging plate (108); and the outer wall of the dredging plate (108) is in contact with the inner wall of the nozzle.

7. A defect marking device for bent pipe detection according to claim 1, characterized in that: The locking device (11) comprises a push rod (111), a second sliding block (112), a connecting rod (113), a fourth spring (114), a fifth spring (115) and a limit block (116); the push rod (111) is fixedly connected to an end of the telescopic rod away from the fixed plate (7); the push rod (111) passes through the support plate (4) and is slidably connected at the penetration point.

8. A defect marking device for bent pipe detection according to claim 7, characterized in that: A third spring is fixed to the side of the support plate (4) away from the telescopic rod, and one end of the third spring away from the support plate (4) is fixedly connected to a second slider (112). The second slider (112) is slidably connected to the inner wall of the L-shaped plate (97). A sliding groove is provided on the side wall of the support plate (4), and the connecting rod (113) is slidably connected to the inner wall of the sliding groove.

9. A defect marking device for bent pipe detection according to claim 8, characterized in that: The bottom surface of the connecting rod (113) is fixedly connected to the upper end of the fourth spring (114), the bottom end of the fourth spring (114) is fixedly connected to the bottom surface of the sliding groove, the bottom surface of the connecting rod (113) is fixedly connected to a limiting plate, the bottom surface of the connecting rod (113) is fixedly connected to the upper end of the fifth spring (115), the outer wall of the fifth spring (115) is in contact with the inner wall of the fixing plate (7), the bottom end of the fifth spring (115) is fixedly connected to the upper surface of the limiting block (116), and a limiting hole is provided on the outer wall of the roller (5).

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