Crack internal detection equipment and method for detecting cracks on inner wall of pipeline

Abstract

The invention discloses crack internal detection equipment and a detection method for cracks on the inner wall of a pipeline, and relates to the technical field of crack detection.The crack internal detection equipment comprises a bottom plate and is characterized in that a movable plate is arranged above the bottom plate in a sliding mode, and two fixed tables are symmetrically arranged at the top of the bottom plate; a second driving assembly used for driving the two fixing tables to move is arranged at the top of the bottom plate. A plurality of to-be-detected pipelines are placed on the moving plate, a plurality of positioning assemblies are arranged on the moving plate, and the positioning assemblies are used for positioning the pipelines to designated positions; a plurality of clamping assemblies are arranged on the moving plate, and the clamping assemblies are used for clamping the corresponding pipelines; the problems that in the prior art, when a trolley runs on the inner wall of a pipeline, running is unstable possibly due to factors such as unevenness of the inner wall of the pipeline, dirt or foreign matter, detection work cannot be continuously conducted, and consequently the overall detection efficiency is reduced are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of crack detection, in particular to a crack internal detection equipment and a method for detecting cracks on the inner wall of a pipeline. BACKGROUND

[0002] The crack internal detection equipment is a special tool for detecting and evaluating internal cracks of materials, which usually has the characteristics of high precision and non-destructive, and can find and analyze defects such as cracks without destroying the material structure.

[0003] In the prior art system, for the task of pipeline crack detection, a pipeline detection robot technology is adopted, which deploys a special robot into the pipeline to perform detection work. The robot is equipped with a high-definition camera system that captures high-definition images of the inner wall of the pipeline under sufficient lighting conditions. These image data are then transmitted in real time to the display screen interface of the external control equipment through wireless or wired communication, and the operator observes and analyzes the pipeline inner wall images presented on the display screen to identify and locate possible crack defects. After completing the detection task of one pipeline, the operator will perform a trolley recovery process, and then redeploy it to another pipeline to be detected to continue the crack detection work.

[0004] Defects of the prior art: when the trolley travels on the inner wall of the pipeline, it may be unstable due to unevenness, dirt or foreign matter on the inner wall of the pipeline, thereby affecting the accuracy and reliability of the detection. Due to the existence of the recovery and redeployment process, the detection work cannot be continuous, resulting in a decrease in overall detection efficiency.

[0005] Therefore, the present application provides a crack internal detection equipment and a method for detecting cracks on the inner wall of a pipeline to meet the needs. SUMMARY

[0006] The purpose of the present application is to provide a crack internal detection equipment and a method for detecting cracks on the inner wall of a pipeline, which solves the problem that in the prior art, when the trolley travels on the inner wall of the pipeline, it may be unstable due to unevenness, dirt or foreign matter on the inner wall of the pipeline, and the detection work cannot be continuous, resulting in a decrease in overall detection efficiency.

[0007] To solve the above problems, the present application provides the following technical solution: a crack internal detection equipment, comprising: a bottom plate, characterized in that: a moving plate is slidably arranged above the bottom plate, two fixed tables are symmetrically arranged on the top of the bottom plate, and a second driving assembly for driving the two fixed tables to move is arranged on the top of the bottom plate; a plurality of pipelines to be detected are placed on the moving plate, a plurality of positioning assemblies are arranged on the moving plate, the positioning assemblies are used for positioning the pipelines to specified positions; a plurality of clamping assemblies are arranged on the moving plate, the clamping assemblies are used for clamping the corresponding pipelines;

[0008] The top of the two fixing tables is provided with a track assembly in common, the track assembly comprises an arc segment, a terminal segment, a starting segment and a U-shaped segment, the arc segment and the terminal segment are fixedly arranged on the top of one of the fixing tables, the starting segment and the U-shaped segment are fixedly arranged on the top of the other fixing table, part of the structure of the starting segment and the U-shaped segment is arranged in suspension, a pipeline detection trolley is arranged on the track assembly, when the starting segment, the arc segment, the U-shaped segment and the terminal segment form a complete track assembly in sequence, the pipeline detection trolley enters the inside of one of the pipelines from the starting segment, and the inside of the multiple pipelines is sequentially detected according to the track of the track assembly.

[0009] Preferably, the upper side of the bottom plate is provided with a first driving assembly for driving the movement of the moving plate, the first driving assembly comprises two first vertical plates fixedly connected to the top of the bottom plate, a first guide rod fixedly connected between the two first vertical plates, a first screw rod rotatably connected between the two first vertical plates, and a horizontal plate fixedly connected between the two first vertical plates, the horizontal plate being below the first guide rod and the first screw rod, the bottom of the moving plate being fixedly connected with a moving seat, the bottom of the moving seat being slidably connected with the horizontal plate, the moving seat being provided with a threaded hole matched with the first screw rod and a cylindrical hole matched with the first guide rod, the threaded hole and the cylindrical hole being in communication with the outside of the moving plate, the threaded hole of the moving seat being threadedly connected with the first screw rod, the first guide rod penetrating through the cylindrical hole of the moving seat, the side of one of the first vertical plates being fixedly connected with a first motor, the output end of the first motor penetrating through the corresponding first vertical plate and being fixedly connected with one end of the first screw rod.

[0010] Preferably, the positioning assembly comprises a plurality of limiting plates arranged in a linear arrangement, and the top of each limiting plate is provided with an arc-shaped opening matched with the pipeline.

[0011] Preferably, the upper side of the bottom plate is provided with a transmission assembly, when the moving plate moves towards the fixed table, the first driving assembly and the transmission assembly cooperate to enable the clamping assembly to operate, thereby clamping the corresponding pipeline, the clamping assembly comprises two second fixed plates symmetrically fixedly connected to the top of the moving plate, a double-head screw rod rotatably connected between the two second fixed plates, opposite threads respectively arranged at the two ends of the outer surface of the double-head screw rod, two arc-shaped clamping plates symmetrically threadedly connected to the double-head screw rod, the arc-shaped clamping plates being adapted to the pipeline, a plurality of first sliding grooves being formed in the top of the moving plate, the bottoms of the two arc-shaped clamping plates being slidably connected to the inner sides of the corresponding first sliding grooves, and one end of the double-head screw rod penetrating through one of the second fixed plates and being fixedly connected with a driven bevel gear.

[0012] Preferably, the second driving assembly comprises two second vertical plates symmetrically fixedly connected to the top of the bottom plate, a double-head screw rod rotatably connected between the two second vertical plates, opposite threads respectively arranged at the two ends of the outer surface of the double-head screw rod, a second guide rod fixedly connected between the two second vertical plates, two connecting plates fixedly connected to the bottom of the fixed table, the double-head screw rod being threadedly connected with the connecting plates, and the double-head screw rod and the second guide rod both penetrating through the connecting plates, a second motor fixedly arranged on the side of one of the second vertical plates, and the output end of the second motor penetrating through the corresponding second vertical plate and being fixedly connected with one end of the double-head screw rod.

[0013] Preferably, a plurality of bearing plates are fixedly connected to the side of the fixed table corresponding to the arc-shaped section and the terminal section, and the plurality of bearing plates are respectively arranged at positions corresponding to the ends of the arc-shaped section and the terminal section.

[0014] Preferably, the top of the moving plate is provided with a marking assembly, the marking assembly comprises a plurality of threaded rods, the threaded rods are provided in one-to-one correspondence with the pipelines, both sides of the threaded rods are provided with third fixing plates, the bottom of the third fixing plate is fixed with the moving plate, the side of one of the third fixing plates is fixedly connected with a driving motor, the driving motor penetrates through the corresponding third fixing plate and is fixedly connected with one end of the corresponding threaded rod, the other end of the threaded rod is rotatably connected with the side of the other third fixing plate, a sliding block is threadedly connected with the threaded rod and penetrates through the corresponding threaded rod, a plurality of second sliding grooves are formed in the top of the moving plate, the second sliding grooves are provided in one-to-one correspondence with the sliding blocks, the bottom of the sliding block is slidably connected in the corresponding second sliding groove, a movable plate is slidably connected in the inside of the sliding block and penetrates through the sliding block, a marking pen is fixedly connected with the side of the movable plate close to the corresponding pipeline, and a fixed column is fixedly connected with the bottom of the movable plate.

[0015] Preferably, the guide groove is provided in one-to-one correspondence with the fixed column, the bottom of the fixed column is slidably connected in the corresponding guide groove, and the guide groove comprises two away sections, a close section and an inclined section in communication between the two away sections.

[0016] The application also discloses a detection method for cracks in the inner wall of a pipeline.

[0017] Compared with the prior art, the application provides a crack detection device and a detection method for cracks in the inner wall of a pipeline, and has the following beneficial effects:

[0018] 1. In the application, the track assembly is composed of an arc-shaped section, a termination section, a starting section and a U-shaped section, which can be spliced to form a complete track. The design of the track assembly enables the pipeline detection trolley to travel on the fixed track instead of directly on the inner wall of the pipeline. Even if the inner wall of the pipeline is uneven, dirty or contains foreign matter, the pipeline detection trolley can maintain a stable driving state because the track provides a stable and continuous driving path for the trolley.

[0019] 2. In the application, when the two fixed platforms are close to each other to the specified position, the starting section, the arc-shaped section, the U-shaped section and the termination section can be seamlessly connected in sequence to form a continuous track through multiple pipelines. Due to the continuity and stability of the track assembly, the pipeline detection trolley can continuously detect inside multiple pipelines along the track without interruption or repositioning. The external control device can control the pipeline detection trolley to travel along the track of the track assembly and simultaneously turn on the camera and the illuminating lamp to transmit the image of the inner wall of the pipeline to the screen for the staff to observe.

[0020] 3、The first drive assembly, the transmission assembly cooperate with each other to realize linkage of the movement of the moving plate and the clamping action of the clamping assembly when the moving plate moves towards the direction of the fixed table, the whole clamping process can be automatically completed without manual intervention once the first motor is started, work efficiency is improved, and time is saved. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0022] Figure 1 is a schematic diagram of the three-dimensional structure of the present application;

[0023] Figure 2 is a schematic diagram of the structure on the moving plate of the present application;

[0024] Figure 3 is a schematic diagram of the structure on the moving plate of the present application; Figure 2

[0025] Figure 4 is a schematic diagram of the structure on the moving plate of the present application; Figure 1

[0026] Figure 5 is a schematic diagram of the bottom structure of the moving plate of the present application;

[0027] Figure 6 is a schematic diagram of the structure of the two fixed tables approaching each other of the present application;

[0028] Figure 7 is a schematic diagram of the structure of the two fixed tables moving away from each other of the present application;

[0029] Figure 8 is a schematic diagram of the structure of the two fixed tables moving away from each other of the present application; Figure 7

[0030] Figure 9 is a schematic diagram of the structure of the two fixed tables moving away from each other of the present application; Figure 7

[0031] ​​​​In the figure: 1, the base plate; 2, the moving plate; 21, the moving seat; 22, the second sliding groove; 23, the first sliding groove; 3, the transmission assembly; 31, the transmission rack; 32, the transmission gear; 33, the fixed shaft; 34, the first fixed plate; 35, the driving bevel gear; 36, the driven bevel gear; 4, the clamping assembly; 41, the arc-shaped clamping plate; 42, the double-headed screw rod; 43, the second fixed plate; 5, the marking assembly; 51, the driving motor; 52, the threaded rod; 53, the sliding block; 54, the movable plate; 55, the third fixed plate; 56, the marking pen; 57, the guide groove; 58, the fixed column body; 6, the first driving assembly; 61, the first motor; 62, the first screw rod; 63, the first guide rod; 64, the first vertical plate; 65, the horizontal plate; 7, the second driving assembly; 71, the second motor; 72, the double-headed screw rod; 73, the second guide rod; 74, the second vertical plate; 8, the track assembly; 81, the arc-shaped section; 82, the terminal section; 83, the starting section; 84, the U-shaped section; 85, the fixed notch; 9, the fixed table; 10, the connecting plate; 11, the bearing plate; 12, the pipeline detection trolley; 13, the positioning assembly. DETAILED DESCRIPTION

[0032] 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 of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0033] Embodiment: Reference Figures 1-9 The crack internal detection device shown comprises a base plate 1, a moving plate 2 is slidably arranged above the base plate 1, a first driving assembly 6 for driving the moving plate 2 to run is arranged above the base plate 1, two fixed tables 9 are symmetrically arranged on the top of the base plate 1, a second driving assembly 7 for driving the two fixed tables 9 to move is arranged on the top of the base plate 1, and the second driving assembly 7 can make the two fixed tables 9 approach or move away from each other.

[0034] The first driving assembly 6 comprises two first vertical plates 64 fixedly connected symmetrically on the top of the bottom plate 1, a first guide rod 63 fixedly connected between the two first vertical plates 64, a first lead screw 62 rotatably connected between the two first vertical plates 64, and a horizontal plate 65 fixedly connected between the two first vertical plates 64 and located below the first guide rod 63 and the first lead screw 62. The bottom of the moving plate 2 is fixedly connected with a moving seat 21, the bottom of the moving seat 21 is slidably connected with the horizontal plate 65, and the moving seat 21 is provided with a threaded hole matched with the first lead screw 62 and a cylindrical hole matched with the first guide rod 63, which are in communication with the outside of the moving plate 2. The threaded hole of the moving seat 21 is threadedly connected with the first lead screw 62, and the first guide rod 63 penetrates through the cylindrical hole of the moving seat 21 and is used to realize the horizontal movement of the moving plate 2 and the moving seat 21. The side surface of one of the first vertical plates 64 is fixedly connected with a first motor 61, and the output end of the first motor 61 penetrates through the corresponding first vertical plate 64 and is fixedly connected with one end of the first lead screw 62.

[0035] When the moving plate 2 needs to move to a position close to the fixed table 9, the first motor 61 is started, the output end of the first motor 61 drives the first lead screw 62 to rotate, so that the moving seat 21 and the moving plate 2 move horizontally under the guidance of the first guide rod 63, and the moving plate 2 moves to a position close to the fixed table 9. When the moving plate 2 needs to move to a position away from the fixed table 9, the first motor 61 can be started in the opposite direction.

[0036] A plurality of pipes to be detected are placed on the moving plate 2, and a plurality of positioning assemblies 13 are arranged on the moving plate 2. The positioning assembly 13 comprises a plurality of limiting plates arranged linearly, and an arc-shaped opening matched with the pipe is formed in the top of each limiting plate. The positioning assembly 13 is used to position the pipe to a specified position. When the pipe needs to be detected, the moving plate 2 is located away from the fixed table 9, and the plurality of pipes are placed on the corresponding positioning assemblies 13, and the side wall of the pipe is attached to the inner wall of the arc-shaped opening of the corresponding limiting plate.

[0037] A plurality of clamping assemblies 4 are arranged on the moving plate 2, and the clamping assembly 4 is used to clamp the corresponding pipe. A transmission assembly 3 is arranged above the bottom plate 1. When the moving plate 2 moves towards the fixed table 9, the first driving assembly 6 and the transmission assembly 3 cooperate to enable the clamping assembly 4 to operate and clamp the corresponding pipe.

[0038] The clamping assembly 4 comprises two second fixed plates 43 symmetrically fixedly connected at the top of the moving plate 2, a double-head screw rod 42 rotationally connected between the two second fixed plates 43, opposite threads in opposite directions respectively arranged at the two ends of the outer surface of the double-head screw rod 42, two arc-shaped clamping plates 41 symmetrically screw-connected on the double-head screw rod 42, the arc-shaped clamping plates 41 being adapted to the pipe, a plurality of first sliding grooves 23 being formed at the top of the moving plate 2, the bottoms of the two arc-shaped clamping plates 41 being slidingly connected at the inner sides of the corresponding first sliding grooves 23, and one end of the double-head screw rod 42 penetrating through one of the second fixed plates 43 and fixedly connected with a driven bevel gear 36.

[0039] The first motor 61 is started, the output end of the first motor 61 drives the first screw rod 62 to rotate, so that the moving seat 21 and the moving plate 2 as a whole move towards the fixed table 9, the transmission gear 32 moves together with the moving plate 2, the plurality of transmission gears 32 on the moving plate 2 relatively move with the corresponding transmission racks 31, so that the transmission gear 32 rotates while moving, the transmission gear 32 drives the fixed shaft 33 and the driving bevel gear 35 to rotate, the driving bevel gear 35 drives the driven bevel gear 36 to rotate, the driven bevel gear 36 drives the double-head screw rod 42 to rotate, so that the corresponding two arc-shaped clamping plates 41 move towards each other, and the corresponding pipe is clamped.

[0040] Only the first motor 61 needs to be started, so that the movement of the moving plate 2 and the clamping action of the clamping assembly 4 are linked, once the first motor 61 is started, the whole clamping process can be automatically completed without manual intervention, the work efficiency is improved, and the time is saved.

[0041] The second driving assembly 7 comprises two second vertical plates 74 fixedly connected symmetrically on the top of the bottom plate 1, a double-headed screw rod 72 rotationally connected between the two second vertical plates 74, the outer surface of the double-headed screw rod 72 being provided with threads of opposite directions at both ends, a second guide rod 73 fixedly connected between the two second vertical plates 74, the bottom of the fixed table 9 being fixedly connected with two connecting plates 10, the double-headed screw rod 72 being threadedly connected with the connecting plates 10, and the double-headed screw rod 72 and the second guide rod 73 penetrating through the connecting plates 10, the second guide rod 73 being used to realize the linear motion of the connecting plates 10 and the fixed table 9, the side of one of the second vertical plates 74 being fixedly provided with a second motor 71, the output end of the second motor 71 penetrating through the corresponding second vertical plate 74 and fixedly connected with one end of the double-headed screw rod 72. When the second motor 71 is started, the output end of the second motor 71 drives the double-headed screw rod 72 to rotate, so that the two fixed tables 9 move close to each other.

[0042] The top of the two fixed tables 9 is commonly provided with a track assembly 8, the track assembly 8 comprising an arc-shaped section 81, a terminal section 82, a starting section 83 and a U-shaped section 84, the arc-shaped section 81 and the terminal section 82 being fixedly provided on the top of one of the fixed tables 9, the starting section 83 and the U-shaped section 84 being fixedly provided on the top of the other fixed table 9, part of the structure of the starting section 83 and the U-shaped section 84 being provided in a suspended manner, the track assembly 8 being provided with a pipeline detection trolley 12, the pipeline detection trolley 12 being provided with a camera and a light (not shown in the figure), the camera and the light being electrically connected with an external control device, when the starting section 83, the arc-shaped section 81, the U-shaped section 84 and the terminal section 82 form a complete track assembly 8 in sequence, the pipeline detection trolley 12 enters the inside of one of the pipelines from the starting section 83 and sequentially detects the cracks in the inside of multiple pipelines along the track of the track assembly 8, and when the pipeline detection trolley 12 travels to the terminal section 82, the crack detection work in the pipeline is completed; when the two fixed tables 9 move close to each other to a specified position, the suspended end of the starting section 83 is butted against one end of the arc-shaped section 81, the other end of the arc-shaped section 81 is butted against one end of the U-shaped section 84, and the other end of the U-shaped section 84 is butted against one end of the terminal section 82, so as to form a complete track assembly 8.

[0043] The side of the fixed table 9 corresponding to the arc-shaped section 81 and the terminal section 82 is fixedly connected with a plurality of bearing plates 11, the plurality of bearing plates 11 being respectively provided at positions corresponding to the ends of the arc-shaped section 81 and the terminal section 82, the plurality of bearing plates 11 being respectively used to support the suspended ends of the starting section 83 and the U-shaped section 84, so as to avoid the deformation of the starting section 83 and the U-shaped section 84, the top of the bearing plate 11 being provided with a guide groove, the guide groove being provided in a gradually expanding manner.

[0044] When the pipeline is between the two fixed stations 9 and is clamped, the second motor 71 is started, the output end of the second motor 71 drives the double-headed screw rod 72 to rotate, so that the two fixed stations 9 move close to each other, and in this process, the overhanging structures of the starting section 83 and the U-shaped section 84 pass through the corresponding pipelines respectively, until the ends of the starting section 83 and the U-shaped section 84 enter the corresponding guide grooves, the guide grooves are provided for expansion, so that when there is a certain matching error between the ends of the starting section 83 and the U-shaped section 84 and the guide grooves, the ends of the starting section 83 and the U-shaped section 84 can still enter the corresponding guide grooves, improving the convenience of assembly, then, the overhanging end of the starting section 83 is connected with one end of the arc-shaped section 81, the other end of the arc-shaped section 81 is connected with one end of the U-shaped section 84, and the other end of the U-shaped section 84 is connected with one end of the termination section 82, so as to form a complete track assembly 8; the trolley is placed on the starting section 83, the external control device controls the trolley to travel along the track of the track assembly 8, the camera and the illuminating lamp are turned on by the external device, the pipeline detection trolley 12 enters one of the pipelines from the starting section 83, and sequentially detects the cracks in the multiple pipelines along the track of the track assembly 8, the camera transmits the image of the inner wall of the pipeline to the screen of the external control device in a bright working environment, and the staff observes the image, when the pipeline detection trolley 12 travels to the termination section 82, the crack detection work in the pipeline is completed.

[0045] Due to the design of the track assembly 8, the pipeline detection trolley 12 can continuously detect in multiple pipelines without interruption or repositioning, compared with the traditional detection method, this way can reduce the detection time and labor intensity.

[0046] In order to avoid the track assembly 8 from shielding the inner wall of the pipeline, a through fixing gap 85 is formed on the track assembly 8, a fixing groove (not shown in the figure) is formed on the fixed station 9, the shape of the fixing groove is the same as that of the fixing gap 85, and the fixing gap 85 is directly above the fixing groove, the front, rear, left and right sides of the pipeline detection trolley 12 are fixedly connected with extension rods (not shown in the figure), the extension rods at the bottom of the pipeline detection trolley 12 penetrate through the fixing gap 85, and the ends of the extension rods away from the trolley are connected with the rotatable camera. The rotatable camera is a prior art, which will not be described here. When the camera enters the fixed station 9, the camera is in the fixing groove.

[0047] The top of the moving plate 2 is provided with a marking assembly 5 for marking the defective pipeline, the marking assembly 5 comprises a plurality of threaded rods 52 which are provided one by one with the pipeline, the two sides of the threaded rod 52 are provided with the third fixed plate 55, the bottom of the third fixed plate 55 is fixed with the moving plate 2, the side of one of the third fixed plates 55 is fixed with the driving motor 51, the driving motor 51 is electrically connected with the external control equipment, the driving motor 51 penetrates through the corresponding third fixed plate 55 and is fixedly connected with one end of the corresponding threaded rod 52, the other end of the threaded rod 52 is rotatably connected with the side of the other third fixed plate 55, the threaded rod 52 is threadedly connected with the sliding block 53, and the sliding block 53 penetrates through the corresponding threaded rod 52, a plurality of second sliding grooves 22 are formed in the top of the moving plate 2, the second sliding grooves 22 are provided one by one with the sliding block 53, the bottom of the sliding block 53 is slidably connected in the corresponding second sliding groove 22, the linear movement of the sliding block 53 is realized, the sliding block 53 is slidably connected with the movable plate 54, and the movable plate 54 penetrates through the sliding block 53, the side of the movable plate 54 close to the corresponding pipeline is fixedly connected with the marking pen 56, the bottom of the movable plate 54 is fixedly connected with the fixed column body 58, a plurality of guide grooves 57 are formed in the top of the moving plate 2, the guide grooves 57 are provided one by one with the fixed column body 58, the bottom of the fixed column body 58 is slidably connected in the corresponding guide groove 57, the guide groove 57 comprises two away sections, a close section and an inclined section in communication between the two away sections, the away section refers to the groove section away from the corresponding pipeline, and the close section refers to the groove section close to the corresponding pipeline.

[0048] When the pipeline detection trolley 12 enters the inner wall of one of the pipelines, and the staff observes that there is a crack in the pipeline through the screen of the external control equipment, the corresponding driving motor 51 is started, the output end of the driving motor 51 drives the corresponding threaded rod 52 to rotate, so that the sliding block 53 moves along the second sliding groove 22, the sliding block 53 drives the movable plate 54 and the marking pen 56 to move, and the fixed column body 58 at the bottom of the marking pen 56 runs in the guide groove 57, when the fixed column body 58 enters the close section from one of the away sections and one of the inclined sections, the pen head of the marking pen 56 contacts the corresponding pipeline, and forms an erasable ink mark on the side of the corresponding pipeline, indicating that the pipeline has defects, and then enters the other away section from the other inclined section.

[0049] It should be noted that the suspended end of the starting section 83 and the suspended end of the U-shaped section 84 cannot be supported for a long time, otherwise the track is easy to deform. It takes a certain amount of time to place multiple pipes on the moving plate 2 for positioning. During the process of positioning the pipes, the starting section 83 and the U-shaped section 84 cannot be connected to the arc-shaped section 81 and the ending section 82, otherwise a collision will occur. Since part of the structure of the starting section 83 and the U-shaped section 84 is suspended, in order to avoid the part of the structure of the starting section 83 and the U-shaped section 84 being in a state of no support for a long time, the movable moving plate 2 is arranged. After the multiple pipes are positioned, the starting section 83 and the arc-shaped section 81, and the U-shaped section 84 and the ending section 82 are disconnected. Then the pipes move to the position corresponding to the fixed table 9 with the moving plate 2, and then the starting section 83 and the arc-shaped section 81, and the U-shaped section 84 and the ending section 82 are connected.

[0050] The method for detecting cracks in the inner wall of a pipe uses the crack inner detection device described above.

[0051] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features, as long as they are within the spirit and principles of the present application. Any modification, equivalent replacement, improvement, etc. made within the scope of the present application should be included in the protection scope of the present application.

Claims

1. A crack- within-inspection apparatus, comprising: The bottom plate is characterized in that: the upper side of the bottom plate is slidably provided with a moving plate, the top of the bottom plate is symmetrically provided with two fixed tables, and the top of the bottom plate is provided with a second driving assembly for driving the two fixed tables to move; the moving plate is placed with a plurality of pipelines to be detected, the moving plate is provided with a plurality of positioning assemblies, and the positioning assemblies are used for positioning the pipelines to the specified positions; the moving plate is provided with a plurality of clamping assemblies, and the clamping assemblies are used for clamping the corresponding pipelines. The top of the two fixed tables is commonly provided with a track assembly, the track assembly comprises an arc segment, a termination segment, a start segment and a U-shaped segment, the arc segment and the termination segment are fixedly arranged on the top of one of the fixed tables, the start segment and the U-shaped segment are fixedly arranged on the top of the other fixed table, part of the structure of the start segment and the U-shaped segment is suspended, and the track assembly is provided with a pipeline detection trolley; when the start segment, the arc segment, the U-shaped segment and the termination segment form a complete track assembly in sequence, the pipeline detection trolley enters the inside of one of the pipelines from the start segment, and the inside of the plurality of pipelines is sequentially detected according to the track of the track assembly.

2. An inside crack detection apparatus according to claim 1, characterized by: The top of the bottom plate is provided with a first driving assembly for driving the moving plate to run, the first driving assembly comprises two first vertical plates fixedly connected to the top of the bottom plate, a first guide rod fixedly connected between the two first vertical plates, a first screw rod rotatably connected between the two first vertical plates, and a horizontal plate fixedly connected between the two first vertical plates, the horizontal plate being below the first guide rod and the first screw rod, the bottom of the moving plate being fixedly connected with a moving seat, the bottom of the moving seat being slidably connected with the horizontal plate, the moving seat being provided with a threaded hole matched with the first screw rod and a cylindrical hole matched with the first guide rod, the threaded hole and the cylindrical hole being in communication with the outside of the moving plate, the threaded hole of the moving seat being threadedly connected with the first screw rod, and the first guide rod penetrating through the cylindrical hole of the moving seat, one side of one of the first vertical plates being fixedly connected with a first motor, and the output end of the first motor penetrating through the corresponding first vertical plate and being fixedly connected with one end of the first screw rod.

3. An inside crack detection apparatus according to claim 1, characterized by: The positioning assembly comprises a plurality of limiting plates arranged in a line, and the top of each limiting plate is provided with an arc-shaped opening matched with the pipeline.

4. An inside crack detection apparatus according to claim 1, characterized by: The upper side of the bottom plate is provided with a transmission assembly, when the moving plate moves towards the fixed table, the first driving assembly and the transmission assembly can cooperate to drive the clamping assembly to clamp the corresponding pipeline, the clamping assembly comprises two second fixed plates which are symmetrically fixedly connected to the top of the moving plate, a double-head screw rod is rotatably connected between the two second fixed plates, the outer surface of the double-head screw rod is provided with threads of opposite directions at both ends, two arc-shaped clamping plates are symmetrically connected to the double-head screw rod, the arc-shaped clamping plates are matched with the pipeline, a plurality of first sliding grooves are formed in the top of the moving plate, the bottom of the two arc-shaped clamping plates is slidably connected to the inner side of the corresponding first sliding groove, one end of the double-head screw rod penetrates through one of the second fixed plates and is fixedly connected with a driven bevel gear.

5. An inside crack detection apparatus according to claim 1, characterized by: The second driving assembly comprises two second vertical plates which are symmetrically fixedly connected to the top of the bottom plate, a double-head screw rod is rotatably connected between the two second vertical plates, the outer surface of the double-head screw rod is provided with threads of opposite directions at both ends, a second guide rod is fixedly connected between the two second vertical plates, the bottom of the fixed table is fixedly connected with two connecting plates, the double-head screw rod is threadedly connected with the connecting plates, and the double-head screw rod and the second guide rod penetrate through the connecting plates, the side surface of one of the second vertical plates is fixedly provided with a second motor, and the output end of the second motor penetrates through the corresponding second vertical plate and is fixedly connected with one end of the double-head screw rod.

6. An inside crack detection apparatus according to claim 1, characterized by: The side surface of the fixed table corresponding to the arc-shaped section and the terminal section is fixedly connected with a plurality of bearing plates, and the plurality of bearing plates are respectively arranged at positions corresponding to the end portions of the arc-shaped section and the terminal section.

7. An inside crack detection apparatus according to claim 1, characterized by: The top of the moving plate is provided with a marking assembly, the marking assembly comprises a plurality of threaded rods which are arranged one-to-one with the pipeline, the two sides of the threaded rod are provided with third fixed plates, the bottom of the third fixed plate is fixed with the moving plate, the side surface of one of the third fixed plates is fixedly provided with a driving motor, the driving motor penetrates through the corresponding third fixed plate and is fixedly connected with one end of the corresponding threaded rod, the other end of the threaded rod is rotatably connected with the side surface of the other third fixed plate, a sliding block is threadedly connected to the threaded rod, and the sliding block penetrates through the corresponding threaded rod, a plurality of second sliding grooves are formed in the top of the moving plate, the second sliding grooves are arranged one-to-one with the sliding blocks, the bottom of the sliding block is slidably connected in the corresponding second sliding groove, a movable plate is slidably connected in the interior of the sliding block, and the movable plate penetrates through the sliding block, a marker pen is fixedly connected to the side surface of the movable plate close to the corresponding pipeline, a fixed column is fixedly connected to the bottom of the movable plate, and a plurality of guide grooves are formed in the top of the moving plate.

8. An inside crack detection apparatus according to claim 7, characterized by: The guide groove is in one-to-one correspondence with the fixed column body, the bottom of the fixed column body is slidingly connected in the corresponding guide groove, the guide groove comprises two faraway sections, a close section, the close section is arranged between the two faraway sections, and the faraway sections and the close section are communicated with an inclined section.

9. A method for detecting cracks in the inner wall of a pipe, characterized in that: The method for detecting cracks in the inner wall of a pipeline uses a crack internal detection device as claimed in any one of claims 1 to 8.

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