A kind of anti-corrosion layer detection device for anti-corrosion pipeline

Abstract

The present invention relates to the technical field of pipeline detection, and specifically to an anti-corrosion layer detection device for an anti-corrosion pipeline, comprising an arc-shaped cover, an arc-shaped track groove being opened in the middle of the arc-shaped cover, a square tube being arranged on the arc-shaped track groove, the square tube being arranged along the radial direction of the arc-shaped cover, a detection mechanism being arranged on the square tube, and a moving mechanism for moving the square tube along the arc-shaped track groove being jointly provided on the arc-shaped cover and the square tube. The present invention moves by pulling an inelastic steel wire rope, so that the square tube can stably follow the separation point of a stripping strip and a pipeline matrix and move synchronously, thereby ensuring that the angle between the stripping strip and the pipeline matrix is ​​always fixed, thereby ensuring the accuracy of the test result. The present invention adopts a dynamometer between a clamping plate and a moving plate to read the tension of the stripping strip, so that the dynamometer only measures the force between the clamping plate and the moving plate, thereby preventing other forces from interfering with the value of the dynamometer, thereby further ensuring the accuracy of the test result.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline detection, in particular to an anti-corrosion layer detection device for an anti-corrosion pipeline. Background Art

[0002] The peeling test of the anti-corrosion layer is a key test item for evaluating the bonding performance between the anti-corrosion layer of the anti-corrosion pipeline and the pipeline substrate, and is an important means to ensure the long-term safe operation of the pipeline. In the prior art, a peeling tester is usually used to perform peeling test on the anti-corrosion layer of the anti-corrosion pipeline. During the test, the operator first cuts a peeling strip on the anti-corrosion layer, then places the peeling tester on the outside of the pipeline, and clamps the peeling strip with the movable clamp of the peeling tester. Then, the motor or hydraulic system drives the movable clamp to pull the peeling strip and the pipeline substrate at a stable speed to gradually separate. In this process, the force sensor of the peeling tester will measure the magnitude of the pulling force in real time, and transmit the data to the computer control system, so as to determine whether the bonding performance between the anti-corrosion layer and the pipeline substrate is qualified.

[0003] During the separation process of the stripping strip and the pipe matrix, the stripping strip and the pipe need to always maintain a 90-degree angle, that is, the stripping strip always remains in the radial position of the pipe, which requires the stripping tester to be always arranged along the radial direction of the pipe. During the stripping process, the separation point between the stripping strip and the pipe matrix moves along the circumferential direction of the pipe. In order to ensure that the force applied to the stripping strip remains unchanged, the stripping tester needs to move synchronously with the separation point between the stripping strip and the pipe matrix, that is, the stripping tester rotates along the circumferential direction of the pipe.

[0004] However, when the peeling tester moves to a non-vertical state, its own gravity will generate a component force in the direction of the pulling force on the peeling strip, thereby applying additional pulling force to the peeling strip, which in turn affects the accuracy of the test results. In addition, when the peeling tester moves on the surface of the pipe, the friction between the peeling tester and the pipe will hinder the movement of the peeling tester, causing the movement of the peeling tester to lag behind the separation point between the peeling strip and the pipe matrix, thereby causing an error in the angle between the peeling strip and the pipe matrix, further affecting the accuracy of the test results. Summary of the invention

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a device for detecting anti-corrosion layer of anti-corrosion pipeline, comprising an arc-shaped cover, an arc-shaped rail groove is opened in the middle of the arc-shaped cover, a square tube is arranged on the arc-shaped rail groove, the square tube is arranged along the radial direction of the arc-shaped cover, a detection mechanism is arranged on the square tube, and the arc-shaped cover and the square tube are jointly provided with a moving mechanism for moving the square tube along the arc-shaped rail groove.

[0006] The detection mechanism includes a sliding frame that slides inside the square tube along the length direction of the square tube, and two symmetrically arranged moving plates are provided on the front side of the sliding frame to slide along the width direction of the square tube. A clamping plate is provided at the rear of the moving plate close to the axis of the arc cover. The clamping plate is slidably connected to the moving plate along the length direction of the square tube through a guide column, and a dynamometer is provided between one of the clamping plates and the moving plate at the corresponding position.

[0007] The moving mechanism includes a rolling assembly arranged on the square cylinder, and the square cylinder slides in the arc-shaped track groove through the rolling assembly. A tightening plate is arranged on the right side of the arc-shaped track groove for sliding along its track, and a steel wire rope is fixedly installed on the side of the tightening plate close to the axis of the arc-shaped cover. A position rod is arranged on the front side of the square cylinder for sliding along its length direction, and a guide wheel is rotatably arranged on the side of the position rod close to the axis of the arc-shaped cover. A rope locking assembly for fixing the steel wire rope is arranged on the sliding frame, and a limiting assembly for fixing it at the coaxial position of the pipeline is arranged on the arc-shaped cover. A fixing plate is fixedly installed on the arc-shaped track groove and located on the right side of the square cylinder, and a tension spring is arranged between the fixing plate and the square cylinder.

[0008] Preferably, the rolling assembly includes two groups of rollers symmetrically arranged front and back and rotatably mounted on a square cylinder, each group consisting of three rollers arranged at equal intervals, the rollers are all located inside the arc-shaped track groove, the middle roller presses against the side wall of the arc-shaped track groove away from its center, and the rollers on both sides press against the side wall of the arc-shaped track groove close to its center.

[0009] Preferably, the locking rope assembly includes two sliding plates slidably arranged on the front side of the sliding frame along the width direction of the square tube, the two sliding plates are located outside the two movable plates, a pushing spring is arranged between the sliding plates and the sliding frames, and a supporting plate is fixedly installed on one end of the sliding plate close to the axis of the arc cover on one side of the movable plate.

[0010] Preferably, a semicircular through hole is penetrated through the middle of the side where the two supporting plates are close to each other, the inner diameter of the semicircular through hole is equal to the outer diameter of the wire rope, and a limiting circular plate is fixedly installed on the end of the wire rope away from the tightening plate, and the outer diameter of the limiting circular plate is larger than the inner diameter of the semicircular through hole.

[0011] Preferably, the limiting assembly includes a plurality of groups of abutment members which are arranged on the inner side of the arc cover at equal intervals along the circumference of the arc cover, and each group consists of two abutment members which are symmetrically arranged front to back. The abutment members are slidably connected to the arc cover along the radial direction through guide rods thereon, and a linkage plate is fixedly mounted on one end of the guide rods of the two abutment members in the same group which is away from the axis of the arc cover.

[0012] Preferably, a bevel plate corresponding to each group of abutments is fixedly installed on the outer side surface of the arc cover, a hydraulic rod is fixedly installed on the side of the longitudinal section of the bevel plate away from the axis of the arc cover, the telescopic section of the hydraulic rod is fixedly connected to the linkage plate at the corresponding position, a hydraulic oil pump is fixedly installed on the rear side of the arc cover through a support plate, and the hydraulic oil pump is connected to all the hydraulic rods through pipelines.

[0013] Preferably, an arc-shaped guide rod arranged along the track of the arc-shaped rail groove is fixedly installed on the left side of the fixed plate, the arc-shaped guide rod passes through the square tube and does not contact the square tube, the tension spring is located outside the arc-shaped guide rod, the position rod is locked together with the square tube by a fastening screw, and the tightening plate is locked together with the arc-shaped cover by a locking screw.

[0014] Preferably, a bidirectional screw is rotatably arranged in the middle of the sliding frame, and two threaded sections of the bidirectional screw are respectively threadedly connected to the two movable plates.

[0015] Preferably, anti-sliding blocks are arranged at equal intervals along the length direction of the square tube on the side where the clamping plates are close to each other, and the anti-sliding blocks on the two clamping plates are staggered along the length direction of the square tube.

[0016] Preferably, a reduction motor is fixedly installed on the inner rear portion of the sliding frame, a driving gear is fixedly installed on the output shaft of the reduction motor, and a fixed rack meshing with the driving gear is fixedly installed on the inner side of the rear wall of the square tube.

[0017] The beneficial effects of the present invention are as follows: 1. The present invention adopts a limit assembly to lock the arc cover on the outside of the coaxial center of the pipeline, so that the square tube can always be located in the radial position of the pipeline, and the wire rope is passed around the lower part of the pipeline and connected to the locking rope assembly. The wire rope and the stripping strip are pulled synchronously by the sliding frame, so that the component force of the square tube's gravity acts on the wire rope and the tension spring, thereby avoiding additional tension on the stripping strip and ensuring the accuracy of the test results.

[0018] Second, the present invention adopts a rolling assembly to make the square tube move along the arc-shaped track groove, so that the square tube does not contact the pipeline, thereby avoiding the friction between the square tube and the pipeline to hinder the movement of the square tube, and by moving by pulling the inelastic steel wire rope, the square tube can stably follow the separation point of the stripping strip and the pipeline matrix and move synchronously, thereby ensuring that the angle between the stripping strip and the pipeline matrix is ​​always fixed, further ensuring the accuracy of the test results.

[0019] 3. The present invention uses a dynamometer between the clamping plate and the movable plate to read the tensile force of the peeling strip, so that the dynamometer only measures the force between the clamping plate and the movable plate, preventing other forces from interfering with the value of the dynamometer, and further ensuring the accuracy of the test results.

[0020] Fourth, the present invention clamps the peeling strip by two clamping plates close to each other. The clamping plates can push the peeling strip by the anti-sliding block thereon, so that the peeling strip is arranged between the two clamping plates in a continuously bent posture, thereby increasing the contact area between the clamping plates and the peeling strip, thereby increasing the friction between the clamping plates and the peeling strip, so that the clamping plates can stably pull the peeling strip to prevent slipping, and further ensure the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a first overall structural schematic diagram of the present invention when detecting a pipeline.

[0023] Figure 2 It is a second overall structural schematic diagram of the present invention.

[0024] Figure 3 It is a structural schematic diagram of the arc cover, square tube, arc track groove, position rod, guide wheel, fixing plate and arc guide rod in the present invention.

[0025] Figure 4 It is a partial cross-sectional view of the arc cover, square tube, position rod, guide wheel and rolling assembly in the present invention.

[0026] Figure 5 It is a partial cross-sectional view of the square cylinder, position rod, guide wheel, wire rope, sliding frame, clamping plate, bidirectional screw and fixed rack in the present invention.

[0027] Figure 6 It is a partial cross-sectional view of the sliding frame, the moving plate, the rope locking assembly, the steel wire rope and the bidirectional screw in the present invention.

[0028] Figure 7 It is a cross-sectional view of the sliding frame, the moving plate, the clamping plate, the dynamometer and the bidirectional screw in the present invention.

[0029] Figure 8 It is a cross-sectional view of the movable plate, the clamping plate, the dynamometer and the anti-sliding block in the present invention.

[0030] Fig. 9 It is a front view of the clamping plate and the anti-sliding block in the present invention.

[0031] Fig.10 It is a cross-sectional view of the sliding frame, the reduction motor, the driving gear and the fixed rack in the present invention.

[0032] In the figure: 1, arc-shaped cover; 2, square tube; 3, detection mechanism; 4, moving mechanism; 11, arc-shaped rail groove; 31, sliding frame; 32, moving plate; 33, clamping template; 34, dynamometer; 36, bidirectional screw; 37, reduction motor; 41, rolling assembly; 42, tightening plate; 43, steel wire rope; 44, position rod; 45, guide wheel; 46, rope locking assembly; 47, limit assembly; 48, fixing plate; 331, anti-sliding block; 371, driving gear; 372, fixed rack; 411, roller; 461, sliding plate; 462, supporting plate; 463, limiting circular plate; 471, abutting member; 472, linkage plate; 473, U-shaped plate; 474, hydraulic rod; 475, hydraulic oil pump; 481, arc-shaped guide rod. Detailed implementation manners

[0033] The embodiments of the present invention will be described in detail below. The following described embodiments are exemplary and are only used to explain the present invention, and should not be construed as a limitation to the present invention. For those not specified in the embodiments in terms of specific technologies or conditions, they shall be carried out according to the technologies or conditions described in the literature in this field or according to the product specifications.

[0034] Refer to Figure 1 and Figure 2 , an anti-corrosion layer detection device for anti-corrosion pipelines, comprising an arc-shaped cover 1, an arc-shaped rail groove 11 is provided in the middle of the arc-shaped cover 1, a square tube 2 is arranged on the arc-shaped rail groove 11, the square tube 2 is arranged along the radial direction of the arc-shaped cover 1, a detection mechanism 3 is arranged on the square tube 2, and a moving mechanism 4 for moving the square tube 2 along the arc-shaped rail groove 11 is jointly arranged on the arc-shaped cover 1 and the square tube 2.

[0035] When it is necessary to perform peeling detection on the anti-corrosion layer of the anti-corrosion pipeline, first, the arc-shaped cover 1 is sleeved on the outside of the pipeline, and then the arc-shaped cover 1 is locked at the coaxial position of the pipeline through the moving mechanism 4. Then, the operator locks the peeled strip sample cut on the anti-corrosion layer of the pipeline on the detection mechanism 3. Subsequently, the moving mechanism 4 pulls the peeled strip sample by pulling the square tube 2, and at the same time, the detection mechanism 3 reads the pulling force applied to the peeled strip sample, so as to judge the peeling performance of the anti-corrosion layer of the anti-corrosion pipeline.

[0036] Refer to Figure 1 , Figure 3 and Figure 4 , the moving mechanism 4 includes a rolling assembly 41 arranged on the square tube 2, the square tube 2 slides in the arc-shaped rail groove 11 through the rolling assembly 41. The rolling assembly 41 includes two groups of rollers 411 that are symmetrically arranged front and back and are rotatably arranged on the square tube 2. Each group consists of three rollers 411 arranged at equal intervals. The rollers 411 are all located inside the arc-shaped rail groove 11. The middle roller 411 abuts against the side wall of the arc-shaped rail groove 11 away from its center of the circle, and the two side rollers 411 abut against the side wall of the arc-shaped rail groove 11 close to its center of the circle.

[0037] The square tube 2 slides on the arc-shaped track groove 11 through the roller 411. The roller 411 is limited so that the square tube 2 is always arranged along the radial direction of the arc-shaped cover 1. When the square tube 2 moves, since the roller 411 only contacts one side wall of the arc-shaped track groove 11, the roller 411 can rotate smoothly while limiting the position, thereby ensuring the smoothness of the movement of the square tube 2.

[0038] See also Figure 1 and Figure 2 The arc cover 1 is provided with a limit assembly 47 for fixing it at a coaxial position of the pipeline. The limit assembly 47 includes a plurality of groups of abutment members 471 arranged at equal intervals on the inner side of the arc cover 1 along the circumference thereof. Each group is composed of two abutment members 471 arranged symmetrically front to back. The abutment members 471 are slidably connected to the arc cover 1 along the radial direction through the guide rods thereon. A linkage plate 472 is fixedly installed at one end of the guide rods of the two abutment members 471 in the same group away from the axis of the arc cover 1.

[0039] Continue reading Figure 1 and Figure 2 A convex plate 473 corresponding to each group of abutment members 471 is fixedly installed on the outer surface of the arc cover 1, and a hydraulic rod 474 is fixedly installed on the side of the longitudinal section of the convex plate 473 away from the axis of the arc cover 1. The telescopic section of the hydraulic rod 474 is fixedly connected to the linkage plate 472 at the corresponding position. A hydraulic oil pump 475 is fixedly installed on the rear side of the arc cover 1 through a support plate, and the hydraulic oil pump 475 is connected to all the hydraulic rods 474 through pipelines.

[0040] When it is necessary to perform stripping inspection on the anti-corrosion layer of the anti-corrosion pipeline, the operator holds the arc cover 1 and puts it on the outside of the pipeline. At the same time, the operator adjusts the position of the square tube 2 through the arc cover 1 so that the square tube 2 is aligned to the position of the stripping strip. Then, all the hydraulic rods 474 are driven at the same time by the hydraulic oil pump 475, so that the telescopic sections of the hydraulic rods 474 are extended synchronously. The hydraulic rods 474 drive the abutment member 471 to move against the outer surface of the pipeline through the linkage plate 472.

[0041] The reaction force of the pipeline on the abutment member 471 pushes the abutment member 471 to drive the arc cover 1 to move to the coaxial position outside the pipeline. When all the abutment members 471 abut against the outer surface of the pipeline, the arc cover 1 is locked at the coaxial position outside the pipeline.

[0042] See also Figure 2 , Figure 3 , Figure 5 , Figure 7 and Figure 8The detection mechanism 3 includes a sliding frame 31 that slides inside the square tube 2 along the length direction thereof, and two symmetrically arranged moving plates 32 are provided on the front side of the sliding frame 31 to slide along the width direction of the square tube 2. A clamping plate 33 is provided at the rear of the moving plate 32 close to the axis of the arc cover 1. The clamping plate 33 is slidably connected to the moving plate 32 along the length direction of the square tube 2 through a guide column, and a dynamometer 34 is provided between one of the clamping plates 33 and the moving plate 32 at the corresponding position.

[0043] It should be noted that the dynamometer 34 is connected to an existing computer via a wired or wireless connection, so as to facilitate recording and analysis of the values ​​of the dynamometer 34 , which is not shown in the computer diagram.

[0044] See also Figure 5 , Figure 7 , Figure 8 and Fig. 9 On the side where the clamping plates 33 are close to each other, anti-sliding blocks 331 are arranged at equal intervals along the length direction of the square tube 2, and the anti-sliding blocks 331 on the two clamping plates 33 are staggered along the length direction of the square tube 2. A bidirectional screw 36 is rotatably arranged in the middle of the sliding frame 31, and the two threaded sections of the bidirectional screw 36 are respectively threadedly connected to the two movable plates 32.

[0045] When the arc cover 1 is locked on the outside of the pipe, the operator holds the end of the stripping strip and puts it between the two clamping plates 33. Then the operator manually rotates the bidirectional screw 36, so that the bidirectional screw 36 drives the two movable plates 32 to approach each other, and the movable plates 32 drive the clamping plates 33 to approach each other synchronously, so that the clamping plates 33 clamp the stripping strip, and the anti-sliding plate 331 can push the stripping strip, so that the stripping strip is arranged between the two clamping plates 33 in a continuously bent posture, thereby increasing the contact area between the clamping plates 33 and the stripping strip and preventing slipping.

[0046] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The moving mechanism 4 also includes a tightening plate 42 which is slidably arranged on the right side of the arc-shaped rail groove 11, and the tightening plate 42 is locked together with the arc-shaped cover 1 through a locking screw. A steel wire rope 43 is fixedly installed on the side of the tightening plate 42 close to the axis of the arc-shaped cover 1, and a position rod 44 is slidably arranged on the front side of the square tube 2 along its length direction, and the position rod 44 is locked together with the square tube 2 through a fastening screw, and a guide wheel 45 is rotatably arranged on the side of the position rod 44 close to the axis of the arc-shaped cover 1, and a rope locking assembly 46 for fixing the steel wire rope 43 is arranged on the sliding frame 31.

[0047] See also Figure 5 and Figure 6The locking rope assembly 46 includes two sliding plates 461 that are slidably arranged on the front side of the inner side of the sliding frame 31 along the width direction of the square tube 2. The two sliding plates 461 are located on the outside of the two moving plates 32. A pushing spring is arranged between the sliding plates 461 and the sliding frame 31. A supporting plate 462 is fixedly installed on one end of the sliding plate 461 close to the side of the moving plate 32 close to the axis of the arc cover 1.

[0048] See also Figure 6 A semicircular through hole is formed in the middle of the side where the two supporting plates 462 are close to each other. The inner diameter of the semicircular through hole is equal to the outer diameter of the wire rope 43. A limiting circular plate 463 is fixedly installed on the end of the wire rope 43 away from the tightening plate 42. The outer diameter of the limiting circular plate 463 is larger than the inner diameter of the semicircular through hole.

[0049] In the initial state, the two movable plates 32 are in a state of moving away from each other, so that the two movable plates 32 respectively push the two sliding plates 461 to also be in a state of moving away from each other, and at the same time compress the pushing spring. When the operator puts the peeling strip sample between the two clamping plates 33, the operator simultaneously passes one end of the wire rope 43 fixing the limiting circular plate 463 around the lower part of the pipe and pulls it to the lower side of the guide wheel 45, and then puts one end of the wire rope 43 fixing the limiting circular plate 463 between the two supporting plates 462, and makes the limiting circular plate 463 located on the side of the supporting plate 462 away from the axis of the arc cover 1.

[0050] When the clamping plate 33 clamps the peeling strip, the two movable plates 32 move to a state close to each other, and at the same time, the pushing spring pushes the sliding plate 461 at the corresponding position to move synchronously through its own elastic force, so that the two sliding plates 461 respectively drive the two supporting plates 462 to fit together, and then the supporting plate 462 limits the wire rope 43 through the semicircular through hole thereon, and at the same time, the limiting circular plate 463 is clamped on the side of the supporting plate 462 away from the axis of the arc cover 1.

[0051] The operator then manually slides the position rod 44 so that the position rod 44 drives the guide wheel 45 to move toward the direction close to the pipeline, so that the guide wheel 45 pushes the wire rope 43 to move synchronously, and then the separation point between the wire rope 43 and the outer side of the pipeline corresponds to the separation point between the stripping strip and the pipeline matrix, so that the square tube 2 can be driven to move by pulling the wire rope 43. Then the operator locks the position rod 44 and the square tube 2 into a whole by tightening the screws by hand.

[0052] Afterwards, the operator manually moves the tightening plate 42 along the arc-shaped rail groove 11, so that the tightening plate 42 tightens the wire rope 43, so that the wire rope 43 fits tightly against the outer surface of the pipe, and at the same time, the wire rope 43 drives the limiting circular plate 463 to press against the supporting plate 462, and then the operator locks the tightening plate 42 and the arc-shaped cover 1 into a whole by manually tightening the locking screws.

[0053] See also Figure 5 and Fig.10 A reduction motor 37 is fixedly installed on the inner rear part of the sliding frame 31, a driving gear 371 is fixedly installed on the output shaft of the reduction motor 37, and a fixed rack 372 meshing with the driving gear 371 is fixedly installed on the inner side of the rear wall of the square tube 2.

[0054] See also Figure 1 , Figure 2 and Figure 3 A fixing plate 48 is fixedly installed on the arc track groove 11 and on the right side of the square tube 2. A tension spring is arranged between the fixing plate 48 and the square tube 2. An arc guide rod 481 arranged along the track of the arc track groove 11 is fixedly installed on the left side of the fixing plate 48. The arc guide rod 481 passes through the square tube 2 and does not contact the square tube 2. The tension spring is located outside the arc guide rod 481.

[0055] When the steel wire rope 43 is attached to the outer surface of the pipe, the reduction motor 37 is started to drive the driving gear 371 to rotate. The driving gear 371 moves along its length direction away from the pipe by meshing with the fixed rack 372, so that the driving gear 371 drives the sliding frame 31 to move synchronously through the reduction motor 37. The sliding frame 31 pulls the stripping sample at a uniform speed through the clamping plate 33. At the same time, the pulling force of the clamping plate 33 on the stripping sample is transmitted to the computer in real time through the dynamometer 34 for recording and analysis.

[0056] When the clamping plate 33 clamps and locks the peeling strip, the tension spring is in a naturally contracted state. The sliding frame 31 moves and pulls the wire rope 43 by driving the supporting plate 462 to move synchronously. Since the end of the wire rope 43 is fixed on the tightening plate 42, and the tightening plate 42 and the arc cover 1 are locked as a whole, the supporting plate 462 cannot pull the wire rope 43, so that the reaction force of the wire rope 43 on the supporting plate 462 drives the supporting plate 462 to move along the wire rope 43, and then the square tube 2 moves synchronously along the arc track groove 11 through the roller 411, and the tension spring is stretched at the same time.

[0057] Since the speed at which the clamping plate 33 pulls the stripping strip is consistent with the speed at which the supporting plate 462 pulls the wire rope 43, the separation point between the stripping strip and the pipeline matrix always corresponds to the separation point between the wire rope 43 and the pipeline, and the tension spring pulls the square tube 2 in the opposite direction of the movement of the square tube 2 through its own elastic force, so that the square tube 2 can move stably along the arc-shaped track groove 11, preventing the square tube 2 from accelerating due to its own gravity.

[0058] When the stripping strip of a fixed length is pulled and separated from the pipeline matrix, the reduction motor 37 is stopped, and then the peeling strength of the anti-corrosion layer of the anti-corrosion pipeline is analyzed through the tension reading of the dynamometer 34. A larger reading means that it is more difficult to pull the anti-corrosion layer of the anti-corrosion pipeline to separate from the pipeline matrix, and a smaller reading means that it is easier to pull the anti-corrosion layer of the anti-corrosion pipeline to separate from the pipeline matrix. When the reading is less than the standard, it is judged that the peeling strength of the anti-corrosion layer of the anti-corrosion pipeline is unqualified.

[0059] See also Figure 1-Figure 10 When testing the peeling strength of the anti-corrosion layer of the anti-corrosion pipeline, the present invention also includes the following steps: In the first step, the operator holds the arc cover 1 and puts it on the outside of the pipeline, and at the same time adjusts the position of the square tube 2 through the arc cover 1, so that the square tube 2 is aligned to the position of the peeling strip, and then drives all the hydraulic rods 474 at the same time through the hydraulic oil pump 475, so that the telescopic sections of the hydraulic rods 474 are extended synchronously, so that the arc cover 1 is locked in the coaxial position on the outside of the pipeline.

[0060] In the second step, the operator holds the end of the strip and places it between the two clamping plates 33. At the same time, the operator passes one end of the wire rope 43 fixed to the limiting circular plate 463 around the lower part of the pipe and pulls it to the lower side of the guide wheel 45. Then, the operator places one end of the wire rope 43 fixed to the limiting circular plate 463 between the two supporting plates 462, and makes the limiting circular plate 463 located on the side of the supporting plate 462 away from the axis of the arc cover 1.

[0061] In the third step, the operator manually rotates the bidirectional screw 36 so that the clamping plate 33 clamps the peeling strip sample, and at the same time allows the push spring to drive the two supporting plates 462 to fit together, so that the supporting plate 462 limits the wire rope 43 through the semicircular through hole thereon, and at the same time, the limiting circular plate 463 is clamped on the side of the supporting plate 462 away from the axis of the arc cover 1.

[0062] In the fourth step, the operator manually slides the position rod 44 to push the wire rope 43 through the guide wheel 45, so that the separation point between the wire rope 43 and the outer side of the pipe corresponds to the separation point between the stripping strip and the pipe matrix, and then the operator locks the position rod 44 and the square tube 2 into a whole by hand-tightening the screws.

[0063] In the fifth step, the operator manually moves the tightening plate 42 along the arc track groove 11, so that the tightening plate 42 tightens the wire rope 43, so that the wire rope 43 fits tightly against the outer surface of the pipe, and at the same time, the wire rope 43 drives the limiting circular plate 463 to press against the supporting plate 462, and then the operator locks the tightening plate 42 and the arc cover 1 into a whole by manually tightening the locking screws.

[0064] The sixth step is to start the reduction motor 37 to drive the driving gear 371 to rotate, so that the sliding frame 31 pulls the stripping sample at a uniform speed through the clamping plate 33, and at the same time the supporting plate 462 pulls the wire rope 43 synchronously, so that the reaction force of the wire rope 43 on the square cylinder 2 drives it to move synchronously along the arc track groove 11 through the roller 411, so that the separation point of the stripping sample and the pipeline matrix always corresponds to the separation point of the wire rope 43 and the pipeline.

[0065] The seventh step is to transmit the pulling force of the clamping plate 33 on the peeling strip to the computer in real time through the dynamometer 34 for recording and analysis. When the peeling strip of a fixed length is pulled to separate from the pipeline matrix, the reduction motor 37 is stopped and the reading of the dynamometer 34 is observed. When the reading is less than the standard, it is judged that the peeling strength of the anti-corrosion layer of the anti-corrosion pipeline is unqualified, otherwise it is qualified.

[0066] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention and they are still covered by the protection scope of the present invention.

Claims

1. A device for detecting anti-corrosion layer of anti-corrosion pipeline, characterized in that: The arc-shaped cover (1) comprises an arc-shaped track groove (11) in the middle of the arc-shaped cover (1), a square tube (2) is arranged on the arc-shaped track groove (11), the square tube (2) is arranged along the radial direction of the arc-shaped cover (1), a detection mechanism (3) is arranged on the square tube (2), and a moving mechanism (4) for moving the square tube (2) along the arc-shaped track groove (11) is jointly arranged on the arc-shaped cover (1) and the square tube (2); The detection mechanism (3) comprises a sliding frame (31) which slides inside the square tube (2) along the length direction thereof, two symmetrically arranged moving plates (32) are slidably arranged inside the front side of the sliding frame (31) along the width direction of the square tube (2), a clamping plate (33) is arranged at the rear part of the moving plate (32) close to the axis of the arc-shaped cover (1), the clamping plate (33) is slidably connected to the moving plate (32) along the length direction of the square tube (2) through a guide column, and a dynamometer (34) is arranged between one of the clamping plates (33) and the moving plate (32) at a corresponding position; The moving mechanism (4) comprises a rolling assembly (41) arranged on the square cylinder (2), the square cylinder (2) slides in the arc track groove (11) through the rolling assembly (41), a tightening plate (42) is arranged on the right side of the arc track groove (11) to slide along its track, a steel wire rope (43) is fixedly installed on the tightening plate (42) on the side close to the axis of the arc cover (1), a position rod (44) is arranged on the front side of the square cylinder (2) to slide along its length direction, a guide wheel (45) is rotatably arranged on the side of the position rod (44) close to the axis of the arc cover (1), a rope locking assembly (46) for fixing the steel wire rope (43) is arranged on the sliding frame (31), a limit assembly (47) for fixing the arc cover (1) at a coaxial position of the pipeline is arranged on the arc track groove (11), a fixing plate (48) is fixedly installed on the right side of the square cylinder (2), and a tension spring is arranged between the fixing plate (48) and the square cylinder (2).

2. The device for detecting anti-corrosion layer of anti-corrosion pipeline according to claim 1, characterized in that: The rolling assembly (41) comprises two groups of rollers (411) symmetrically arranged front and back and rotatably mounted on the square tube (2), each group comprising three rollers (411) arranged at equal intervals, the rollers (411) being located inside the arc-shaped track groove (11), the middle roller (411) being pressed against the side wall of the arc-shaped track groove (11) away from the center thereof, and the rollers (411) on both sides being pressed against the side walls of the arc-shaped track groove (11) close to the center thereof.

3. The device for detecting anti-corrosion layer of an anti-corrosion pipeline according to claim 1, characterized in that: The locking rope assembly (46) comprises two sliding plates (461) which are slidably arranged on the front side of the interior of the sliding frame (31) along the width direction of the square tube (2); the two sliding plates (461) are located outside the two moving plates (32); a pushing spring is arranged between the sliding plates (461) and the sliding frame (31); and a supporting plate (462) is fixedly installed on one end of the sliding plate (461) which is close to the side of the moving plate (32) and close to the axis of the arc cover (1).

4. The device for detecting the anti-corrosion layer of an anti-corrosion pipeline according to claim 3 is characterized in that: A semicircular through hole is formed through the middle of the side where the two supporting plates (462) are close to each other, and the inner diameter of the semicircular through hole is equal to the outer diameter of the steel wire rope (43). A limiting circular plate (463) is fixedly installed at one end of the steel wire rope (43) away from the tightening plate (42), and the outer diameter of the limiting circular plate (463) is larger than the inner diameter of the semicircular through hole.

5. The device for detecting anti-corrosion layer of anti-corrosion pipeline according to claim 1, characterized in that: The limiting assembly (47) comprises a plurality of groups of abutment members (471) arranged at equal intervals on the inner side of the arc-shaped cover (1) along the circumference thereof, each group being composed of two abutment members (471) arranged symmetrically in front and back, the abutment members (471) being slidably connected to the arc-shaped cover (1) along the radial direction thereof via guide rods thereon, and a linkage plate (472) being fixedly mounted on one end of the guide rods of the two abutment members (471) in the same group which is away from the axis of the arc-shaped cover (1).

6. The device for detecting the anti-corrosion layer of an anti-corrosion pipeline according to claim 5, characterized in that: A curved plate (473) corresponding to each group of abutment members (471) is fixedly mounted on the outer side of the curved cover (1); a hydraulic rod (474) is fixedly mounted on the side of the longitudinal section of the curved plate (473) away from the axis of the curved cover (1); the telescopic section of the hydraulic rod (474) is fixedly connected to a linkage plate (472) at a corresponding position; a hydraulic oil pump (475) is fixedly mounted on the rear side of the curved cover (1) via a support plate; the hydraulic oil pump (475) is connected to all the hydraulic rods (474) via pipelines.

7. The device for detecting anti-corrosion layer of an anti-corrosion pipeline according to claim 1, characterized in that: An arc-shaped guide rod (481) arranged along the track of the arc-shaped track groove (11) is fixedly installed on the left side of the fixed plate (48); the arc-shaped guide rod (481) passes through the square tube (2) without contacting the square tube (2); the tension spring is located outside the arc-shaped guide rod (481); the position rod (44) is locked together with the square tube (2) by a fastening screw; and the tightening plate (42) is locked together with the arc-shaped cover (1) by a locking screw.

8. The device for detecting anti-corrosion layer of an anti-corrosion pipeline according to claim 1, characterized in that: A bidirectional screw rod (36) is rotatably arranged in the middle of the sliding frame (31), and two threaded sections of the bidirectional screw rod (36) are respectively threadedly connected to the two moving plates (32).

9. The device for detecting anti-corrosion layer of an anti-corrosion pipeline according to claim 1, characterized in that: On the side where the clamping plates (33) are close to each other, anti-sliding blocks (331) are arranged at equal intervals along the length direction of the square tube (2), and the anti-sliding blocks (331) on the two clamping plates (33) are arranged alternately along the length direction of the square tube (2).

10. The anti-corrosion layer detection device for anti-corrosion pipelines according to claim 1, characterized in that: A reduction motor (37) is fixedly mounted on the inner rear portion of the sliding frame (31), a driving gear (371) is fixedly mounted on the output shaft of the reduction motor (37), and a fixed rack (372) meshing with the driving gear (371) is fixedly mounted on the inner side of the rear wall of the square tube (2).

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