An external pressure pipe wall corrosion detection device

Abstract

The present invention discloses an externally covered pressure pipeline wall corrosion detection device. The present invention adopts an enveloping driving and walking mechanism to improve the stability of the device when walking in the pipeline, thereby ensuring the stability during detection. Moreover, the detector is installed on the enveloping positioning mechanism, which can realize the enveloping positioning of the pipeline, further effectively improving the stability of the corrosion detector during detection and improving the detection accuracy. Moreover, the clamping rotating roller can walk very smoothly and be stably clamped and positioned, and the adjustment mechanism can automatically adjust the position of the clamping rotating roller according to the pipeline diameter or the covering position to realize the enveloping clamping positioning. While adjusting the position of the clamping rotating roller, the adjustment mechanism can also automatically adjust the distance between the corrosion detector and the pipeline to be detected, thereby realizing the adaptive adjustment of the detector and ensuring the detection accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline wall corrosion detection, in particular to an externally covered pressure pipeline wall corrosion detection device. Background Art

[0002] Pipeline corrosion detection refers to pipeline detection for the purpose of detecting metal loss such as pipe wall corrosion. It is a basic method used to understand the damage of in-service pipelines in the working environment and to ensure that defects and damage are detected before serious problems occur in the pipeline. In the past, the traditional method of detecting pipeline damage was pipeline pressure testing, which was very expensive and generally required the pipeline to be shut down.

[0003] With the continuous development of magnetic detection, acoustic and optical detection, eddy current detection and ultrasonic detection technology, the corrosion detector using magnetic leakage technology and ultrasonic technology for pipeline inspection can detect the size and location of damage such as corrosion pits, stress corrosion cracks and fatigue cracks.

[0004] In addition, with the continuous development of technologies such as robots, for the inspection of longer pipelines, a robot-like walking mechanism is currently used to drive the detector to automatically move forward on the pipeline in order to achieve automatic inspection. However, the current shape mechanism has poor stability when walking on the pipeline, which causes the detection mechanism to shake during inspection or the walking route to twist, resulting in distortion of the detection and other problems. At the same time, it is easily affected by external factors during inspection, and the distance between the detector and the pipeline cannot be adaptively adjusted according to factors such as the diameter of the pipeline, thereby affecting the inspection efficiency and the stability and accuracy of the inspection. In addition, the location of the detected problem cannot be recorded or marked during inspection, which leads to the problem of repeated inspections.

[0005] Therefore, it is necessary to provide an externally covered pressure pipeline wall corrosion detection device to solve the above problems. Summary of the invention

[0006] To achieve the above object, the present invention provides the following technical solution: a device for detecting the wall corrosion of an outer-clad pressure pipeline, characterized in that it comprises:

[0007] A sheathed driving and traveling mechanism, which is detachably mounted on the pipeline to be inspected and can move along the axial extension direction of the pipeline;

[0008] A distance measuring mechanism, which is installed at the rear end of the enveloping driving and traveling mechanism, and can cooperate with a reference block installed at the end of the pipeline to be inspected, so as to measure the real-time distance between the reference block and the reference block through the distance measuring mechanism;

[0009] A control mechanism, the control mechanism is installed at the front end side of the enclosed driving and traveling mechanism, and the control mechanism is control-connected with the enclosed driving and traveling mechanism, the distance measuring mechanism, the marking mechanism and the corrosion degree detector;

[0010] An intermediate adapter plate, the intermediate adapter plate is fixedly mounted on one side of the control mechanism;

[0011] A marking mechanism, the marking mechanism is mounted on the intermediate adapter plate, and the marking mechanism can mark the position on the pipeline to be inspected where the corrosion degree exceeds a set value;

[0012] A detection mounting plate, the detection mounting plate is fixedly mounted on the front end of the intermediate adapter plate;

[0013] A covering positioning mechanism, the covering positioning mechanism is installed on the lower surface of the detection mounting plate, the covering positioning mechanism at least comprises: a front covering positioning mechanism and a rear covering positioning mechanism, the front covering positioning mechanism and the rear covering positioning mechanism are arranged at intervals in the axial direction of the pipeline to be detected;

[0014] The front covering positioning mechanism and the rear covering positioning mechanism have the same structure and both include:

[0015] An adjusting mechanism, the upper end of which is connected to the detection mounting plate;

[0016] Clamping rotating rollers, the clamping rotating rollers are arranged at intervals on both sides of the pipe to be inspected, and the two clamping rotating rollers are not arranged in parallel when clamping to the outer wall of the pipe, and the clamping rotating rollers are rotatably arranged on the adjusting mechanism, and the adjusting mechanism can automatically adjust the position of the clamping rotating roller according to the pipe diameter or the covering position;

[0017] A corrosion detection fixing plate, wherein the corrosion detection fixing plate is connected to the adjustment mechanism by a connecting assembly;

[0018] A corrosion detector is fixedly mounted on the lower end surface of the corrosion detection fixing plate. The adjustment mechanism can automatically adjust the distance between the corrosion detector and the pipeline to be detected while adjusting the position of the clamping rotating roller.

[0019] Further, preferably, the adjustment mechanism comprises:

[0020] Extension plates, the extension plates are fixedly mounted on both sides of the detection mounting plate, and the extension direction of the extension plates is perpendicular to the axial direction of the pipeline;

[0021] An adjustment plate, the upper end of which is hingedly connected to the bottom of the detection mounting plate, and each of the extension plates corresponds to one adjustment plate;

[0022] An adjusting cylinder, the upper end of which is hingedly connected to a hinge seat at the bottom of the extension plate, and the lower end of which is hingedly connected to a hinge seat at the upper part of the adjusting plate. When the adjusting cylinder is extended or retracted, the adjusting plate can be rotated around a hinge position between the adjusting plate and the detection mounting plate so as to adjust the inclination angle of the adjusting plate.

[0023] Furthermore, preferably, the adjustment mechanism further comprises:

[0024] A connecting card seat, wherein the connecting card seat is lockably mounted on the adjusting plate, and a convex shaft is fixedly arranged at a position of the connecting card seat away from the adjusting plate;

[0025] A fixed shaft, the end of which is fixedly connected to the convex shaft by a connecting flange, the fixed shaft and the convex shaft are coaxially arranged, the clamping rotating roller is a hollow shaft, and the clamping rotating roller is rotatably sleeved on the fixed shaft by a bearing.

[0026] Further, as a preference, at least two parallel adjustment grooves are provided on the upper end surface of the adjustment plate away from the detection mounting plate, and a plurality of locking screw holes are provided on the upper end of the connecting socket, and a plurality of locking bolts pass through the adjustment grooves and are threadedly connected to the locking screw holes, so that the position of the connecting socket can be locked and adjusted by the locking bolts and the adjustment grooves.

[0027] Further, preferably, the connection assembly comprises:

[0028] Inner slide rails, the bottom side of each adjustment plate is provided with an inner slide rail, and the inner slide rails on two oppositely arranged adjustment plates are symmetrically arranged;

[0029] A suspension slide, the suspension slide being slidably suspended on the inner slide rail;

[0030] An inverted L-shaped connecting rod, one end of which is fixed to the suspension slide, and the other end of which is fixedly connected to a corrosion detection fixing plate;

[0031] A telescopic guide rod, the upper end of which is fixed to the bottom of the detection mounting plate, the lower end of which is fixedly connected to the upper center of the corrosion detection fixing plate, and the telescopic guide rod is telescopically arranged;

[0032] A distance measuring device is arranged at the bottom of both sides of the detection mounting plate, and is used to detect the distance between the distance measuring device and the outer wall of the pipeline to be detected below.

[0033] Further, as a preference, the enclosed driving and walking mechanism comprises:

[0034] The covering sleeve comprises a first half covering sleeve and a second half covering sleeve, one end of the first half covering sleeve is hingedly connected to one end of the second half covering sleeve, the other end of the first half covering sleeve and the other end of the second half covering sleeve can be snap-fitted and connected, and the cavity after snap-fitting is for the pipeline to be inspected to pass through;

[0035] The walking drive mechanism comprises two groups of walking drive mechanisms arranged in a front-to-back spacing, and the two groups of walking drive mechanisms have the same structure, and both include:

[0036] A card seat group, three card seat groups are arranged in a circumferential array on the covering sleeve, each card seat group includes two card seats that are opposite and spaced apart, the buckle connection between the first half covering sleeve and the second half covering sleeve is located between one of the card seat groups, and the card seat groups are detachably connected with detachable rollers, and the remaining two card seat groups are respectively located on both sides of the hinge of the first half covering sleeve and the second half covering sleeve, and the remaining two card seat groups are rotatably provided with a first floating roller and a second floating roller by a floating adjustment mechanism;

[0037] The base assembly is provided with a first travel motor for driving the first floating roller to rotate and a second travel motor for driving the second floating roller to rotate.

[0038] Further, preferably, the first half sheath and the second half sheath are both provided with an avoidance groove, and the first floating roller, the second floating roller and the detachable roller are all extended into the avoidance groove; and the roller surface shapes of the first floating roller, the second floating roller and the detachable roller are all arc surface structures adapted to the pipeline, and a convex ring is further provided at the axial middle position of the first floating roller or the second floating roller; wherein the detachable roller comprises:

[0039] A connecting shaft, the connecting shaft is inserted between the corresponding clamping seat groups, and a limiting bolt is arranged at one end of the connecting shaft. After the connecting shaft is inserted on the clamping seat group, the limiting bolt is used to limit the axial direction of the connecting shaft;

[0040] A first detachable roller, which is detachably and rotatably sleeved on the connecting shaft;

[0041] a second detachable roller, which is detachably and rotatably sleeved on the connecting shaft, and an anti-rotation shaft pin and a pin hole are butt-jointed between the first detachable roller and the second detachable roller, so that the first detachable roller and the second detachable roller can rotate simultaneously on the connecting shaft;

[0042] The floating adjustment mechanism comprises:

[0043] A floating groove, wherein the holders for mounting the first floating roller and the second floating roller are both provided with floating grooves extending radially along the covering sleeve, and roller seats are rotatably connected at both ends of the first floating roller and the second floating roller, and the roller seats are floatably located in the floating groove;

[0044] A floating adjustment bolt, wherein the top of the holder is provided with an adjustment screw hole connected with the floating groove, and the floating adjustment bolt threadably extends into and is connected to the adjustment screw hole;

[0045] A floating strong spring, one end of which abuts against the floating adjustment bolt, and the other end of which abuts against the roller seat;

[0046] A locking nut is threadedly connected to the outer end of the floating adjustment bolt.

[0047] Further, preferably, the control mechanism comprises:

[0048] A first mounting sleeve, wherein the first mounting sleeve is fixedly connected to one side of the first half sheath, and the first mounting sleeve is adapted to the shape of the first half sheath;

[0049] A second mounting sleeve, wherein the second mounting sleeve is fixedly connected to one side of the second half sheath, and the second mounting sleeve is adapted to the shape of the second half sheath;

[0050] A control seat, the control seat is extended and arranged on the first mounting sleeve or the second mounting sleeve;

[0051] The controller is fixedly mounted on the control seat, and the control seat is provided with a cable hole for the control cable to pass through.

[0052] Further, preferably, the distance measuring mechanism comprises:

[0053] A connecting seat, the connecting seat is installed and connected to the control seat;

[0054] An infrared rangefinder, which is fixed on the connecting seat and corresponds to the position of the reference block;

[0055] A battery pack is installed on the connecting seat or the control seat, and the battery pack provides electrical energy for the infrared rangefinder, the enclosed driving and walking mechanism, the marking mechanism and the corrosion detector.

[0056] Further, preferably, the marking mechanism comprises:

[0057] A spray line liquid storage tank, wherein the intermediate adapter plate is provided with a hole slot, the spray line liquid storage tank is mounted on the intermediate adapter plate and is located above the hole slot, and a liquid injection pipe is provided at the upper end of the spray line liquid storage tank;

[0058] A spring shock-absorbing telescopic rod, wherein there are multiple spring shock-absorbing telescopic rods, and multiple spring shock-absorbing telescopic rods are used around the bottom of the spray liquid storage tank to connect to the middle adapter plate;

[0059] A liquid spray pump, the liquid spray pump is located at the lower end of the intermediate adapter plate, and the input end of the liquid spray pump is connected to the bottom of the spray line liquid storage tank;

[0060] A spray pen holder, the upper end of which is fixedly mounted on the bottom of the intermediate adapter plate;

[0061] A rotating arm, the upper end of which is connected to the lower end of the spray pen holder by a rotating driver, and the rotating driver can drive the rotating arm to rotate so as to adjust the inclination of the rotating arm;

[0062] A spray pen is fixedly mounted on the end of the rotating arm and is arranged toward the outer wall of the pipe corresponding to the corrosion detector.

[0063] Compared with the prior art, the present invention provides an externally covered pressure pipeline wall corrosion detection device, which has the following beneficial effects:

[0064] In the present invention, the use of a wrapping drive and walking mechanism can improve the stability of the detector when walking in the pipeline, thereby ensuring the stability during detection, and the detector is installed on the wrapping positioning mechanism, which can achieve wrapping positioning of the pipeline, further effectively improving the stability of the corrosion detector during detection and improving the detection accuracy. Moreover, the clamping rotating roller can walk very smoothly and stably clamp and position, and the adjustment mechanism can automatically adjust the position of the clamping rotating roller according to the pipeline diameter or the wrapping position to achieve wrapping clamping positioning. While adjusting the position of the clamping rotating roller, the adjustment mechanism can also automatically adjust the distance between the corrosion detector and the pipeline to be detected, thereby achieving adaptive adjustment of the detector and ensuring detection accuracy.

[0065] In the present invention, the adjustment mechanism can automatically adjust the inclination of the adjustment plate to achieve the optimal position of the covering positioning, and the position of the clamping rotating roller can be adjusted by connecting the clamping seat to achieve a larger range of adjustment. The spacing measurer can realize automatic feedback adjustment of the corrosion detector. The floating roller of the walking mechanism can realize elastic floating clamping of the pipe fitting to prevent the problem of sticking or jamming, and can also realize powerful driving walking. The marking mechanism can conveniently mark the position where the corrosion degree exceeds the set value. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 It is a schematic diagram of the overall structure of an externally covered pressure pipeline wall corrosion detection device;

[0067] Figure 2 It is a structural schematic diagram of a sheathed driving and traveling mechanism of an outer sheathed pressure pipeline wall corrosion detection device;

[0068] Figure 3 It is a structural schematic diagram of a sheathing positioning mechanism of an externally sheathed pressure pipeline wall corrosion detection device;

[0069] Figure 4 A device for detecting the corrosion degree of an outer pressure pipe wall Figure 1 A schematic diagram of the local enlarged structure at point A in the middle;

[0070] Figure 5 A device for detecting the corrosion degree of an outer pressure pipe wall Figure 1 A schematic diagram of the local enlarged structure at B in the middle;

[0071] Figure 6 It is a schematic diagram of the main structure of a sheathing positioning mechanism in an outer sheathing pressure pipeline wall corrosion detection device for sheathing positioning and clamping the pipeline;

[0072] Figure 7 It is a schematic diagram of the main structure of the marking mechanism and the covering positioning mechanism in an externally covered pressure pipeline wall corrosion detection device;

[0073] Figure 8 It is a structural schematic diagram of a marking mechanism in an externally covered pressure pipeline wall corrosion detection device;

[0074] Fig. 9 It is a side view structural schematic diagram of a sheathed driving and walking mechanism of a marking mechanism in an outer sheathed pressure pipeline wall corrosion detection device;

[0075] In the figure: 1, covering sleeve; 2, covering drive and walking mechanism; 3, distance measuring mechanism; 4, connecting seat; 5, battery pack; 6, control mechanism; 7, marking mechanism; 8, detection installation plate; 9, front covering positioning mechanism; 10, rear covering positioning mechanism; 11, intermediate adapter plate; 12, avoidance groove; 13, control seat; 14, first installation sleeve; 15, second installation sleeve; 16, second floating roller; 17, first floating roller; 18, floating adjustment bolt; 19, floating groove; 20, roller seat; 21, connecting shaft; 22, card seat group; 23, second detachable roller; 24, first detachable roller; 25, extension plate; 2 6. Connecting base; 27. Connecting flange; 28. Fixed shaft; 29. ​​Clamping rotating roller; 30. Adjusting plate; 31. Adjusting cylinder; 32. Adjusting slot; 33. Locking bolt; 34. Pipe to be tested; 35. Inverted L-shaped connecting rod; 36. Corrosion detector; 37. Corrosion detection fixing plate; 38. Telescopic guide rod; 39. Suspension slide; 40. Spacing measurer; 41. Liquid injection pipe; 42. Spray line liquid storage tank; 43. Spring shock-absorbing telescopic rod; 44. Hole slot; 45. Spray pump; 46. Rotary drive; 47. Spray line pen holder; 48. Rotating arm; 49. Spray line pen; 50. Inner slide rail. DETAILED DESCRIPTION

[0076] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned description of the drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, which is merely a way of distinguishing the objects of the same attributes when describing them in the embodiments of the present application. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, so that the process, method, system, product or equipment comprising a series of units need not be limited to those units, but may include other units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0077] Example 1: Please refer to Figure 1-Figure 9 In an embodiment of the present invention, a device for detecting the corrosion degree of a wall of an outer-clad pressure pipeline is provided, characterized in that it comprises:

[0078] A sheathed driving and traveling mechanism 2, wherein the sheathed driving and traveling mechanism 2 is detachably mounted on the pipeline 34 to be inspected, and the sheathed driving and traveling mechanism 2 can move along the axial extension direction of the pipeline;

[0079] A distance measuring mechanism 3, the distance measuring mechanism 3 is installed at the rear end of the enclosed driving and walking mechanism 2, and the distance measuring mechanism can cooperate with a reference block installed at the end of the pipeline 34 to be detected, so as to measure the real-time distance between it and the reference block through the distance measuring mechanism;

[0080] A control mechanism 6, wherein the control mechanism 6 is installed at the front end side of the enclosed driving and traveling mechanism 2, and the control mechanism is controlled and connected with the enclosed driving and traveling mechanism 2, the distance measuring mechanism 3, the marking mechanism and the corrosion degree detector 36;

[0081] An intermediate adapter plate 11, wherein the intermediate adapter plate 11 is fixedly mounted on one side of the control mechanism 6;

[0082] A marking mechanism 7, wherein the marking mechanism 7 is mounted on the intermediate adapter plate 11, and the marking mechanism 7 can mark a position on the pipeline 34 to be inspected where the corrosion degree exceeds a set value;

[0083] A detection mounting plate 8, wherein the detection mounting plate 8 is fixedly mounted on the front end of the intermediate adapter plate;

[0084] A covering positioning mechanism, the covering positioning mechanism is installed on the lower surface of the detection mounting plate 8, and the covering positioning mechanism at least includes: a front covering positioning mechanism 9 and a rear covering positioning mechanism 10, and the front covering positioning mechanism 9 and the rear covering positioning mechanism 10 are arranged at intervals in the axial direction of the pipeline 34 to be detected;

[0085] The front covering positioning mechanism and the rear covering positioning mechanism have the same structure and both include:

[0086] An adjusting mechanism, the upper end of which is connected to the detection mounting plate 8;

[0087] Clamping rotating rollers 29, the clamping rotating rollers 29 are arranged at intervals on both sides of the pipe 34 to be inspected, and the two clamping rotating rollers 29 are not arranged in parallel when the clamping rotating rollers 29 are clamped to the outer wall of the pipe, and the clamping rotating rollers 29 are rotatably arranged on the adjusting mechanism, and the adjusting mechanism can automatically adjust the position of the clamping rotating rollers 29 according to the pipe diameter or the covering position;

[0088] A corrosion detection fixing plate 37, wherein the corrosion detection fixing plate 37 is connected to the adjustment mechanism by a connecting assembly;

[0089] The corrosion detector 36 is fixedly mounted on the lower end surface of the corrosion detection fixing plate 37. The adjustment mechanism can automatically adjust the distance between the corrosion detector and the pipeline 34 to be detected while adjusting the position of the clamping rotating roller 29.

[0090] Embodiment 2: The difference from Embodiment 1 is that, in this embodiment, the adjustment mechanism comprises:

[0091] Extension plates 25, the extension plates 25 are fixedly mounted on both sides of the detection mounting plate 8, and the extension direction of the extension plates 25 is perpendicular to the axial direction of the pipeline;

[0092] An adjustment plate 30, the upper end of which is hingedly connected to the bottom of the detection mounting plate 8, and each of the extension plates corresponds to one adjustment plate 30;

[0093] The adjusting cylinder 31 has its upper end hingedly connected to the hinge seat at the bottom of the extension plate, and its lower end hingedly connected to the hinge seat at the upper part of the adjusting plate. When the adjusting cylinder 31 is extended or retracted, the adjusting plate can be rotated around the hinge position between the adjusting plate 30 and the detection mounting plate 8 so as to adjust the inclination angle of the adjusting plate 30.

[0094] The regulating mechanism also includes:

[0095] A connecting card seat 26, wherein the connecting card seat 26 is lockably mounted on the adjusting plate 30, and a convex shaft is fixedly provided at a position of the connecting card seat 26 away from the adjusting plate;

[0096] The fixed shaft 28 has its end fixedly connected to the convex shaft by a connecting flange 27. The fixed shaft 28 is coaxially arranged with the convex shaft. The clamping rotating roller 29 is a hollow shaft. The clamping rotating roller 29 is rotatably mounted on the fixed shaft 28 by a bearing.

[0097] At least two parallel adjustment grooves 32 are provided on the upper end surface of the adjustment plate away from the detection mounting plate 8, and a plurality of locking screw holes are provided on the upper end of the connecting base, and a plurality of locking bolts 33 pass through the adjustment grooves and are threadedly connected in the locking screw holes, so that the position of the connecting base can be locked and adjusted by the locking bolts 33 and the adjustment grooves 32.

[0098] Embodiment 3: The difference from Embodiment 1 and Embodiment 2 is that, in this embodiment, the connection component includes:

[0099] An inner slide rail 50, wherein the bottom side of each adjustment plate is provided with an inner slide rail 50, and the inner slide rails on two oppositely arranged adjustment plates are symmetrically arranged;

[0100] A suspension slide 39, wherein the suspension slide 39 is slidably suspended on the inner slide rail;

[0101] An inverted L-shaped connecting rod 35, one end of which is fixed to the suspension slide, and the other end of which is fixedly connected to a corrosion detection fixing plate;

[0102] A telescopic guide rod 38, the upper end of which is fixed to the bottom of the detection mounting plate 8, the lower end of which is fixedly connected to the upper center of the corrosion detection fixing plate, and the telescopic guide rod is telescopically arranged;

[0103] The spacing measuring device 40 is arranged at the bottom of both sides of the detection mounting plate 8, and is used to detect the spacing between it and the outer wall of the pipeline to be detected below. The distance measured by the spacing measuring device can realize feedback control of the adjustment mechanism.

[0104] Embodiment 4: The difference from Embodiments 1-3 is that, in this embodiment, the enveloping driving and walking mechanism 2 comprises:

[0105] The covering sleeve 1 comprises a first half covering sleeve and a second half covering sleeve, one end of the first half covering sleeve is hingedly connected to one end of the second half covering sleeve, the other end of the first half covering sleeve and the other end of the second half covering sleeve can be snap-fitted and connected, and the cavity after snap-fitting is for the pipeline 34 to be inspected to pass through;

[0106] The walking drive mechanism comprises two groups of walking drive mechanisms arranged in a front-to-back spacing, and the two groups of walking drive mechanisms have the same structure, and both include:

[0107] A card seat group 22, three groups of card seat groups 22 are arranged in a circumferential array on the covering sleeve, each group of the card seat groups 22 includes two card seats that are opposite and spaced apart, the buckle connection between the first half covering sleeve and the second half covering sleeve is located between one group of card seat groups, and the card seat groups are detachably connected with detachable rollers, and the remaining two groups of card seat groups are respectively located on both sides of the hinge of the first half covering sleeve and the second half covering sleeve, and the remaining two groups of card seat groups are rotatably provided with a first floating roller 17 and a second floating roller 16 by a floating adjustment mechanism;

[0108] The holder assembly is provided with a first travel motor for driving the first floating roller 17 to rotate and a second travel motor for driving the second floating roller 16 to rotate. Of course, a travel motor may also be provided on the detachable roller.

[0109] The first half sheath and the second half sheath are both provided with an avoidance groove 12, and the first floating roller 17, the second floating roller 16 and the detachable roller all extend into the avoidance groove 12; and the roller surface shapes of the first floating roller 17, the second floating roller 16 and the detachable roller are all arc structures adapted to the pipeline, and a convex ring is also provided at the axial middle position of the first floating roller 17 or the second floating roller 16; wherein the detachable roller comprises:

[0110] A connecting shaft 21, which is inserted between the corresponding card holder groups, and a limiting bolt is provided at one end of the connecting shaft. After the connecting shaft is inserted on the card holder group, the limiting bolt is used to limit the axial direction of the connecting shaft;

[0111] A first detachable roller 24, which is detachably and rotatably sleeved on the connecting shaft;

[0112] A second detachable roller 23, which is detachably and rotatably sleeved on the connecting shaft, and an anti-rotation shaft pin and a pin hole are connected between the first detachable roller and the second detachable roller, so that the first detachable roller and the second detachable roller can rotate on the connecting shaft at the same time;

[0113] The floating adjustment mechanism comprises:

[0114] A floating groove 19, on which the first floating roller 17 and the second floating roller 16 are mounted, a floating groove 19 extending radially along the covering sleeve is provided, and both ends of the first floating roller 17 and the second floating roller 16 are rotatably connected with a roller seat 20, and the roller seat 20 is floatably located in the floating groove;

[0115] A floating adjustment bolt 18, wherein the top of the holder is provided with an adjustment screw hole connected with the floating groove, and the floating adjustment bolt 18 is threadedly inserted into and connected to the adjustment screw hole;

[0116] A floating strong spring, one end of which abuts against the floating adjustment bolt, and the other end of which abuts against the roller seat;

[0117] A locking nut is threadedly connected to the outer end of the floating adjustment bolt.

[0118] The control mechanism 6 comprises:

[0119] A first mounting sleeve 14, wherein the first mounting sleeve is fixedly connected to one side of the first half sheath, and the first mounting sleeve 14 is adapted to the shape of the first half sheath;

[0120] A second mounting sleeve 15, wherein the second mounting sleeve is fixedly connected to one side of the second half sheath, and the second mounting sleeve 14 is adapted to the shape of the second half sheath;

[0121] A control seat, the control seat is extended and arranged on the first mounting sleeve 14 or the second mounting sleeve 15;

[0122] The controller is fixedly mounted on the control seat, and the control seat is provided with a cable hole for the control cable to pass through.

[0123] The distance measuring mechanism comprises:

[0124] A connecting seat 4, the connecting seat is installed and connected to the control seat;

[0125] An infrared rangefinder 3, which is fixed on the connecting seat and corresponds to the position of the reference block;

[0126] A battery pack 5 is installed on the connecting seat or the control seat, and provides electrical energy for the infrared rangefinder, the enclosed driving and walking mechanism 2, the marking mechanism and the corrosion detector 36.

[0127] Embodiment 4: The difference from Embodiments 1-4 is that, in this embodiment, the marking mechanism includes:

[0128] A spray line liquid storage tank 42, wherein a hole slot 44 is provided on the intermediate adapter plate 11, and the spray line liquid storage tank 42 is installed on the intermediate adapter plate and is located above the hole slot, and a liquid injection pipe 41 is provided at the upper end of the spray line liquid storage tank 42;

[0129] A spring shock-absorbing telescopic rod 43, wherein there are multiple spring shock-absorbing telescopic rods 43, and multiple spring shock-absorbing telescopic rods 43 are used around the bottom of the spray liquid storage tank 42 to connect to the middle adapter plate;

[0130] A liquid spraying pump 45, the liquid spraying pump is located at the lower end of the intermediate adapter plate 11, and the input end of the liquid spraying pump is connected to the bottom of the spray line liquid storage tank 42;

[0131] A spray pen holder 47, the upper end of which is fixedly mounted on the bottom of the intermediate adapter plate 11;

[0132] A rotating arm 48, the upper end of which is connected to the lower end of the spray pen holder 47 by a rotating driver 46, and the rotating driver can drive the rotating arm to rotate so as to adjust the inclination of the rotating arm;

[0133] A spray pen 49 is fixedly mounted on the end of the rotating arm 48 and is arranged toward the outer wall of the pipe corresponding to the corrosion detector.

[0134] The present invention adopts a wrapping drive and walking mechanism to improve its walking stability in the pipeline, thereby ensuring stability during detection, and the detector is installed on the wrapping positioning mechanism, which can achieve wrapping positioning of the pipeline, further effectively improving the stability of the corrosion detector during detection and improving the detection accuracy, and the clamping rotating roller can walk very smoothly and stably clamp and position, and the adjustment mechanism can automatically adjust the position of the clamping rotating roller according to the pipeline diameter or the wrapping position to achieve wrapping clamping positioning, and the adjustment mechanism can also automatically adjust the position of the clamping rotating roller while adjusting the position of the clamping rotating roller. The distance between the corrosion detector and the pipeline to be detected is adjusted to achieve adaptive adjustment of the detector and ensure detection accuracy; the adjustment mechanism of the present invention can automatically adjust the inclination of the adjustment plate to achieve the covering positioning at the optimal position, and the position of the clamping rotating roller can be adjusted by connecting the clamping seat to achieve a larger range of adjustment, the distance measuring device can realize automatic feedback adjustment of the corrosion detector, the floating roller of the walking mechanism can realize elastic floating clamping of the pipe fitting to prevent the problem of sticking or jamming, and can also realize powerful driving walking, and the marking mechanism can conveniently mark the position where the corrosion degree exceeds the set value.

[0135] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for detecting the corrosion degree of an outer-clad pressure pipeline wall, characterized in that: It includes: An encapsulated driving and traveling mechanism (2), the encapsulated driving and traveling mechanism (2) being detachably mounted on a pipe (34) to be inspected, and the encapsulated driving and traveling mechanism (2) being able to move along an axial extension direction of the pipe; a distance measuring mechanism (3), the distance measuring mechanism (3) being mounted on the rear end of the enclosed driving and walking mechanism (2), the distance measuring mechanism being capable of cooperating with a reference block mounted on the end of the pipeline to be inspected (34), so as to measure the real-time distance between the reference block and the pipeline to be inspected through the distance measuring mechanism; A control mechanism (6), the control mechanism (6) being mounted on the front end side of the enclosed drive and travel mechanism (2), the control mechanism being control-connected to the enclosed drive and travel mechanism (2), the distance measuring mechanism (3), the marking mechanism, and the corrosion degree detector (36); An intermediate adapter plate (11), the intermediate adapter plate (11) being fixedly mounted on one side of the control mechanism (6); a marking mechanism (7), the marking mechanism (7) being mounted on the intermediate adapter plate (11), the marking mechanism (7) being capable of marking a position on the pipeline (34) to be inspected where the degree of corrosion exceeds a set value; A detection mounting plate (8), the detection mounting plate (8) being fixedly mounted on the front end of the intermediate adapter plate; A sheathing positioning mechanism, the sheathing positioning mechanism being mounted on the lower surface of the detection mounting plate (8), the sheathing positioning mechanism comprising at least: a front sheathing positioning mechanism (9) and a rear sheathing positioning mechanism (10), the front sheathing positioning mechanism (9) and the rear sheathing positioning mechanism (10) being arranged at intervals in the axial direction of the pipeline (34) to be detected; The front covering positioning mechanism and the rear covering positioning mechanism have the same structure and both include: an adjustment mechanism, the upper end of the adjustment mechanism being connected to the detection mounting plate (8); Clamping rotating rollers (29), the clamping rotating rollers (29) being arranged at intervals on both sides of the pipeline (34) to be inspected, and the two clamping rotating rollers (29) are arranged non-parallel when the clamping rotating rollers (29) are clamped to the outer wall of the pipeline, the clamping rotating rollers (29) are rotatably arranged on the adjustment mechanism, and the adjustment mechanism can automatically adjust the position of the clamping rotating rollers (29) according to the pipeline diameter or the covering position; A corrosion detection fixing plate (37), wherein the corrosion detection fixing plate (37) is connected to the adjustment mechanism using a connecting assembly; A corrosion detector (36), the corrosion detector (36) being fixedly mounted on the lower end surface of the corrosion detection fixing plate (37), wherein the adjustment mechanism can automatically adjust the distance between the corrosion detector and the pipeline (34) to be detected while adjusting the position of the clamping rotating roller (29); The regulating mechanism comprises: Extension plates (25), the extension plates (25) being fixedly mounted on two sides of the detection mounting plate (8), and the extension direction of the extension plates (25) being perpendicular to the axial direction of the pipeline; An adjustment plate (30), the upper end of the adjustment plate (30) being hingedly connected to the bottom of the detection mounting plate (8), and each of the extension plates corresponds to one adjustment plate (30); an adjusting cylinder (31), the upper end of the adjusting cylinder (31) being hingedly connected to a hinge seat at the bottom of the extension plate, and the lower end of the adjusting cylinder (31) being hingedly connected to a hinge seat at the upper part of the adjusting plate, and when the adjusting cylinder (31) is extended or retracted, the adjusting plate can be caused to rotate about a hinge position between the adjusting cylinder and the detection mounting plate (8) so as to adjust the inclination angle of the adjusting plate (30); The regulating mechanism also includes: A connecting card seat (26), the connecting card seat (26) being lockably mounted on the adjusting plate (30) in an adjustable position, and a convex shaft being fixedly provided at a position of the connecting card seat (26) away from the adjusting plate; A fixed shaft (28), the end of the fixed shaft (28) being fixedly connected to the convex shaft by means of a connecting flange (27), the fixed shaft (28) being coaxially arranged with the convex shaft, the clamping rotating roller (29) being a hollow shaft, and the clamping rotating roller (29) being rotatably sleeved on the fixed shaft (28) by means of a bearing; The connection component comprises: An inner slide rail (50), wherein the bottom side of each adjustment plate is provided with an inner slide rail (50), and the inner slide rails on two oppositely arranged adjustment plates are symmetrically arranged; A suspension slide (39), the suspension slide (39) being slidably suspended on the inner slide rail; an inverted L-shaped connecting rod (35), one end of the inverted L-shaped connecting rod (35) being fixed to the suspension slide, and the other end of the inverted L-shaped connecting rod (35) being fixedly connected to a corrosion detection fixing plate; A telescopic guide rod (38), the upper end of the telescopic guide rod being fixed to the bottom position of the detection mounting plate (8), the lower end of the telescopic guide rod being fixedly connected to the upper center position of the corrosion detection fixing plate, and the telescopic guide rod being telescopically arranged; A spacing measuring device (40) is arranged at the bottom of both sides of the detection mounting plate (8) and is used to detect the spacing between the spacing measuring device (40) and the outer wall of the pipeline to be detected below.

2. The device for detecting the corrosion degree of an outer-clad pressure pipeline wall according to claim 1 is characterized in that: At least two parallel adjustment slots (32) are provided on the upper end surface of the adjustment plate at a position away from the detection mounting plate (8), and a plurality of locking screw holes are provided on the upper end of the connection base, and a plurality of locking bolts (33) pass through the adjustment slots and are threadedly connected to the locking screw holes, so that the position of the connection base can be locked and adjusted through the locking bolts (33) and the adjustment slots (32).

3. The device for detecting the wall corrosion of an outer-clad pressure pipeline according to claim 1, characterized in that: The encapsulated driving and walking mechanism (2) comprises: A covering sleeve (1), the covering sleeve (1) comprising a first half covering sleeve and a second half covering sleeve, one end of the first half covering sleeve being hingedly connected to one end of the second half covering sleeve, the other end of the first half covering sleeve and the other end of the second half covering sleeve being snap-fitted together, and the cavity after snap-fitting is for a pipeline (34) to be inspected to pass through; The walking drive mechanism comprises two groups of walking drive mechanisms arranged in a front-to-back spacing, and the two groups of walking drive mechanisms have the same structure, and both include: A card seat group (22), wherein three card seat groups (22) are arranged in a circular array on the covering sleeve, each card seat group (22) comprises two card seats that are arranged opposite to each other and at intervals, the buckled connection between the first half covering sleeve and the second half covering sleeve is located between one of the card seat groups, the card seat groups are detachably connected with detachable rollers, and the remaining two card seat groups are respectively located on both sides of the hinged connection between the first half covering sleeve and the second half covering sleeve, and the remaining two card seat groups are respectively rotatably provided with a first floating roller (17) and a second floating roller (16) using a floating adjustment mechanism; The card holder group is provided with a first travel motor for driving the first floating roller (17) to rotate and a second travel motor for driving the second floating roller (16) to rotate.

4. The device for detecting the corrosion degree of the outer-clad pressure pipeline wall according to claim 3 is characterized in that: The first half sheath and the second half sheath are both provided with an avoidance groove (12), and the first floating roller (17), the second floating roller (16) and the detachable roller all extend into the avoidance groove (12); and the roller surfaces of the first floating roller (17), the second floating roller (16) and the detachable roller are all in an arc surface structure adapted to the pipeline, and a convex ring is further provided at an axial middle position of the first floating roller (17) or the second floating roller (16); wherein the detachable roller comprises: A connecting shaft (21), the connecting shaft being inserted between corresponding clamping seat groups, and a limiting bolt being arranged at one end of the connecting shaft, and after the connecting shaft is inserted into the clamping seat group, the limiting bolt is used to limit the axial direction of the connecting shaft; A first detachable roller (24), the first detachable roller (24) being detachably and rotatably sleeved on the connecting shaft; a second detachable roller (23), the second detachable roller (23) being detachably and rotatably sleeved on the connecting shaft, and an anti-rotation shaft pin and a pin hole being butt-jointed between the first detachable roller and the second detachable roller, so that the first detachable roller and the second detachable roller can rotate simultaneously on the connecting shaft; The floating adjustment mechanism comprises: A floating groove (19), wherein the holders for mounting the first floating roller (17) and the second floating roller (16) are both provided with floating grooves (19) extending radially along the covering sleeve, and roller seats (20) are rotatably connected at both ends of the first floating roller (17) and the second floating roller (16), and the roller seats (20) are floatably located in the floating grooves; A floating adjustment bolt (18), wherein the top of the holder is provided with an adjustment screw hole connected to the floating groove, and the floating adjustment bolt (18) is threadedly inserted into and connected to the adjustment screw hole; A floating strong spring, one end of which abuts against the floating adjustment bolt, and the other end of which abuts against the roller seat; A locking nut is threadedly connected to the outer end of the floating adjustment bolt.

5. The device for detecting the corrosion degree of the outer-clad pressure pipeline wall according to claim 3 is characterized in that: The control mechanism (6) comprises: A first mounting sleeve (14), the first mounting sleeve being fixedly connected to one side of the first half sheath, and the first mounting sleeve (14) being adapted in shape to the first half sheath; a second mounting sleeve (15), the second mounting sleeve being fixedly connected to one side of the second half sheath, and the second mounting sleeve (14) being adapted in shape to the second half sheath; A control seat, the control seat extending and arranged on the first mounting sleeve (14) or the second mounting sleeve (15); The controller is fixedly mounted on the control seat, and the control seat is provided with a cable hole for the control cable to pass through.

6. The device for detecting the corrosion degree of the outer-clad pressure pipeline wall according to claim 3 is characterized in that: The distance measuring mechanism comprises: A connecting seat (4), the connecting seat being mounted and connected to the control seat; An infrared rangefinder, which is fixed on the connecting seat and corresponds to the position of the reference block; A battery pack (5), the battery pack being mounted on the connection seat or the control seat, the battery pack providing electrical energy for the infrared rangefinder, the enclosed drive and travel mechanism (2), the marking mechanism, and the corrosion detector (36).

7. The device for detecting the wall corrosion of an outer-clad pressure pipeline according to claim 3, characterized in that: The marking mechanism comprises: A spray line liquid storage tank (42), wherein the intermediate adapter plate (11) is provided with a hole groove (44), the spray line liquid storage tank (42) is installed on the intermediate adapter plate and is located above the hole groove, and a liquid injection pipe (41) is provided at the upper end of the spray line liquid storage tank (42); A spring shock-absorbing telescopic rod (43), wherein there are a plurality of spring shock-absorbing telescopic rods (43), and the bottom of the spray line liquid storage tank (42) is surrounded by a plurality of the spring shock-absorbing telescopic rods (43) connected to the middle adapter plate; a liquid spraying pump (45), the liquid spraying pump being located at the lower end of the intermediate adapter plate (11), and the input end of the liquid spraying pump being in communication with the bottom of the spray line liquid storage tank (42); A spray pen holder (47), the upper end of which is fixedly mounted on the bottom of the intermediate adapter plate (11); A rotating arm (48), the upper end of which is connected to the lower end of the spray pen holder (47) by a rotating driver (46), wherein the rotating driver can drive the rotating arm to rotate so as to adjust the inclination of the rotating arm; A spray pen (49) is fixedly mounted on the end of the rotating arm (48), and is arranged toward the outer wall of the pipe corresponding to the part directly below the corrosion detector.

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