A device and method for detecting anti-corrosion performance of anti-corrosion layer of reinforced ring steel pipe

Abstract

The present invention relates to the technical field of steel pipe detection, and in particular to a device and method for detecting the anti-corrosion performance of the anti-corrosion layer of a reinforced ring steel pipe, comprising a base frame and a top frame fixedly connected to the top of the base frame, wherein a locking mechanism for locking the reinforced ring steel pipe is arranged inside the base frame, and a prying and pulling mechanism for prying and pulling the anti-corrosion layer on the surface of the reinforced ring steel pipe is arranged at the center of the top frame. The locking mechanism in the present invention utilizes the reinforced ring of the reinforced ring steel pipe to stably lock the reinforced ring steel pipe, effectively ensuring the detection stability of the reinforced ring steel pipe; the present invention adopts a prying and pulling mechanism to automatically complete the continuous operation of prying and pulling the anti-corrosion layer of the reinforced ring steel pipe, and at the same time, the prying knife and the pressing knife are combined to perform composite work, which can not only make the prying knife elastically pry the anti-corrosion layer, but also ensure the stability of the prying knife and the pressing knife being tightly closed, effectively ensuring the prying and pulling force.

Description

Technical Field

[0001] The present invention relates to the technical field of steel pipe detection, and in particular to a device and method for detecting the anti-corrosion performance of an anti-corrosion layer of a reinforced ring steel pipe. Background Art

[0002] Reinforced ring steel pipe is a special type of steel pipe, usually used in water conservancy and hydropower engineering, oil and gas transportation and other fields. Its characteristic is that the outer wall is equipped with a reinforced ring to improve the external pressure resistance and overall stability of the steel pipe. After the production of the steel pipe is completed, the reinforced ring operation and 3PE anti-corrosion process are required. The specific steps are: steel pipe inspection, welding and neck ring addition, pipe installation, steel pipe preheating, shot blasting and rust removal, cleaning and purging, furnace heating, upper rotation cleaning, external epoxy powder hot melt, adhesive hot melt, PE powder hot melt, internal epoxy powder hot melt, curing and cooling, pipe mouth cleaning, appearance inspection, layer inspection, labeling, packaging and warehousing and factory inspection.

[0003] Among them, layer detection is the most important step to verify the anti-corrosion performance of the anti-corrosion layer of the reinforced steel pipe. At present, the main detection method for the anti-corrosion performance of the anti-corrosion layer of the reinforced steel pipe is to soak the produced reinforced steel pipe sample in high-temperature hot water, then draw a rectangular opening on the anti-corrosion layer, and then use a suitable tool to pry off the surface anti-corrosion coating from the opening position. The adhesion performance of the coating is evaluated by the size of the prying coating area. However, this method is currently completed manually. During the inspection, the staff directly placed the reinforced steel pipe inspection sample on the ground, and then used a sharp tool to pry off the anti-corrosion coating. During the prying stage, manual assistance is required to press the reinforced steel pipe. On the one hand, the above-mentioned prying method is difficult to ensure the uniformity and consistency of the prying force. Due to the difference in the force applied by the staff, the same sample is prone to obtain greatly different test results, and the test accuracy is insufficient; on the other hand, the prying force is unidirectional. It is difficult to ensure the stability of the reinforced steel pipe by relying solely on manual pressing and its own friction. The reinforced steel pipe is prone to move in the direction of the prying force, which will not only affect the inspection and efficiency, but also affect the accuracy of the inspection results. Summary of the invention

[0004] Technical problem to be solved: The present invention provides a device and method for detecting the anti-corrosion performance of the anti-corrosion layer of a reinforced ring steel pipe, which can solve the above-mentioned problems.

[0005] Technical solution: In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution, a device for detecting the anti-corrosion performance of the anti-corrosion layer of a reinforced ring steel pipe, comprising a base frame and a top frame fixedly connected to the top of the base frame, a locking mechanism for locking the reinforced ring steel pipe is arranged inside the base frame, and a prying and pulling mechanism for prying and pulling the anti-corrosion layer on the surface of the reinforced ring steel pipe is arranged at the center of the top frame.

[0006] The locking mechanism includes a connecting plate that is symmetrical on the left and right and movably arranged inside the base frame, and a tightening component for controlling the change of the distance between the two is commonly arranged on the connecting plates on the left and right sides, and the front and rear ends of the connecting plate are symmetrically fixedly connected with end arc frames, and two sliding rods are fixedly connected between the upper and lower ends of the end arc frames on the front and rear sides, and two movable arc frames distributed front and back are commonly arranged on the upper and lower corresponding sliding rods, and two bidirectional electric push rods that are symmetrical up and down are fixedly connected to the movable arc frame, and an arc-shaped rib plate is commonly fixedly connected between the output ends on the same side of the two bidirectional electric push rods on the same movable arc frame through a connecting frame, and the movable arc frame, the end arc frame and the rib plate are coaxial.

[0007] The prying and pulling mechanism includes a prying knife movably arranged just above the opening of the anti-corrosion layer of the reinforced ring steel pipe, a pressing knife movably arranged above the prying knife, the pressing knife is fixedly connected to the output end of the second electric push rod, the second electric push rod is fixedly connected to the support plate, a connecting column is fixedly connected to the upper side of the support plate, a reciprocating prying assembly for controlling the prying knife to move back and forth to pry the front side of the opening of the anti-corrosion layer of the reinforced ring steel pipe is arranged on the upper end of the connecting column, a pulling assembly for controlling the pressing knife and the prying knife to move forward synchronously is arranged on the upper end of the reciprocating prying assembly, the pulling assembly includes a mounting frame, the upper side of the mounting frame is fixedly connected to the output end of a plurality of electric push rods, and the electric push rod is fixedly connected to the top frame.

[0008] As a preferred technical solution of the present invention, the tightening assembly includes a movable plate that is symmetrically fixedly connected to the connecting plate front and back, two movable plates symmetrically distributed left and right are commonly threadedly connected to the bidirectional threaded rod and slidably connected to guide rod 2, the two movable plates on the same bidirectional threaded rod are respectively threadedly connected to two threaded sections with opposite thread directions on the bidirectional threaded rod, the bidirectional threaded rod is rotatably connected between the left and right side walls of the base frame, guide rod 2 is fixedly connected between the left and right side walls of the base frame, the same ends of the two bidirectional threaded rods extend to the outside of the base frame and are connected through a synchronous belt drive, one end of any bidirectional threaded rod is also fixedly connected to the output end of motor three, and motor three is fixedly connected to the outer side wall of the base frame.

[0009] As a preferred technical solution of the present invention, the two front and rear bidirectional threaded rods are diagonally distributed. In specific operation, the diagonal distribution arrangement can ensure that the upper and lower forces of the moving plate and the connecting plate are balanced, improve the overall structural movement stability and overall structural strength, and further help improve the subsequent stability of the reinforcement ring steel pipe locking.

[0010] As a preferred technical solution of the present invention, the movable arc frame is slidably connected to the corresponding slide rod 2, and a plurality of positioning holes are opened on the slide rod 2. The end portion where the movable arc frame is connected to the slide rod 2 is threadedly connected with a locking bolt, and the locking bolt cooperates with the corresponding positioning hole.

[0011] As a preferred technical solution of the present invention, the pulling assembly also includes a transmission screw rotatably connected between the front and rear side walls of the mounting frame, and a guide rod 1 fixedly connected between the front and rear side walls of the mounting frame, a movable frame is threadedly connected to the transmission screw, and the movable frame is also slidably connected to the guide rod 1, one end of the transmission screw extends to the outside of the mounting frame and is fixedly connected to the output end of motor 1, motor 1 is fixedly connected to the outer wall of the mounting frame, and the upper ends of the left and right sides of the movable frame are hinged with telescopic plates, and the upper ends of the telescopic plates are hinged with sliders, and the sliders are slidably connected to the top inner wall of the top frame.

[0012] As a preferred technical solution of the present invention, the reciprocating prying assembly includes support blocks that are symmetrically fixedly connected to the bottom of the mobile frame front and back, and sliding rods 1 are slidably connected to the front and rear support blocks, and a movable frame is fixedly connected between the sliding rods 1 on both sides, and the inner sides of the upper and lower walls of the movable frame are provided with racks, and a half gear is provided between the racks on both sides. At the same time, the half gear is only meshed with the rack on one side, and the half gear is rotatably connected to the bottom of the mobile frame through a rotating rod, and the rotating rod is transmission-connected to the output end of the motor 2 through a synchronous belt, and the motor 2 is fixedly connected in the mobile frame, and the lower center of the movable frame is fixedly connected to the connecting column, and the lower end of the connecting column is fixedly connected to a mounting plate located behind the pressing knife, and a buffer component for buffering the prying of the prying knife is provided between the mounting plate and the prying knife, and a limiting component for limiting the movable position of the prying knife is provided between the pressing knife and the prying knife.

[0013] As a preferred technical solution of the present invention, the buffer component includes a plurality of movable rods fixedly connected to the rear end of the pry tool, the plurality of movable rods are slidable and penetrated and installed on the lower side of the mounting plate, the rear end of the movable rods is fixedly connected to the limiting plate, and a spring sleeved on the outside of the movable rods is connected between the rear end of the pry tool and the front end of the mounting plate.

[0014] As a preferred technical solution of the present invention, the limiting component includes a support plate that is symmetrically fixedly connected to the rear side of the mounting plate, a cross-connecting plate is fixedly connected to the lower side of the support plate, a rack 2 is slidably and limitatively connected between the cross-connecting plates on both sides, a top plate is fixedly connected to the front side of the rack 2, the top plate and the prying tool are at the same height and are both lower than the rack 2, a miter plate inclined upward by 45° is fixedly connected to the front side of the support plate, a through hole is provided on the mounting plate for the miter plate to pass through, a number of linkage gears are rotatably connected between the miter plates on both sides, and the number of linkage gears are meshed and connected in sequence, the front side of the uppermost linkage gear is meshed and connected with rack 1, rack 1 is fixedly connected to the rear end of the press knife, and the lower side of the lowermost linkage gear is meshed and connected with rack 2.

[0015] As a preferred technical solution of the present invention, the number of the linkage gears is at least four and is an even number.

[0016] The present invention also provides a method for testing the anti-corrosion performance of the anti-corrosion layer of a reinforced ring steel pipe, comprising the following steps: Step 1: Place the reinforced ring steel pipe into a heating pool, add enough water to fully submerge the reinforced ring steel pipe and heat it, the heating temperature is 75℃±3℃ and the heating time is at least 48h, or the heating temperature is 95℃±3℃ and the heating time is 24h, and then take out the reinforced ring steel pipe.

[0017] Step 2: When the reinforced ring steel pipe is still warm, immediately use a knife to cut a rectangular opening of approximately 15mmx30mm on the coating. The knife mark should penetrate the coating to reach the base pipe.

[0018] Step 3: After the temperature of the reinforced ring steel pipe is naturally cooled to 20℃±3℃ in the air, put the reinforced ring steel pipe into the performance testing device for anti-corrosion layer performance testing.

[0019] Step 4: Evaluate the adhesion grade of the inner coating of the rectangle according to the following grading standards.

[0020] Grade 1 - The coating cannot be removed by prying.

[0021] Level 2 - Less than or equal to 50% of the coating has been lifted off.

[0022] Level 3 - The coating is peeled off by more than 50%, but the coating shows obvious resistance to peeling.

[0023] Level 4 - The coating can be easily pried off into strips or large pieces.

[0024] Grade 5 - The coating is peeled off in one piece.

[0025] Beneficial effects: 1. The locking mechanism of the present invention utilizes the reinforced ring of the reinforced ring steel pipe to stably lock the reinforced ring steel pipe, effectively ensuring the detection stability of the reinforced ring steel pipe, and avoiding the displacement of the reinforced ring steel pipe during the detection stage, which affects the progress of the detection operation and the final detection results.

[0026] 2. The present invention adopts a prying and pulling mechanism to automatically complete the continuous operation of prying and pulling the anti-corrosion layer of the reinforced ring steel pipe. At the same time, the composite work is performed by combining the prying knife and the pressing knife, which can not only make the prying knife elastically pry the anti-corrosion layer, but also ensure the stability of the prying knife and the pressing knife being tightly closed, effectively ensure the prying and pulling force, and thus help to improve the accuracy of the detection results of the anti-corrosion layer of the reinforced ring steel pipe.

[0027] 3. The present invention adopts a locking mechanism and a prying mechanism to automatically complete the adhesion detection of the anti-corrosion layer of the reinforced ring steel pipe, which can not only ensure the effectiveness of the adhesion detection of the anti-corrosion layer of the reinforced ring steel pipe, but also improve the efficiency of the adhesion detection of the anti-corrosion layer of the reinforced ring steel pipe through rapid prying. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0029] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0030] Figure 2 It is a partial cross-sectional view of the locking mechanism of the present invention.

[0031] Figure 3 It is a front structural schematic diagram of the present invention.

[0032] Figure 4 It is a three-dimensional structural schematic diagram of the prying and pulling mechanism of the present invention.

[0033] Figure 5 It is a three-dimensional structural schematic diagram of the reciprocating prying assembly of the present invention.

[0034] Figure 6 It is a cross-sectional view of the prying and pulling mechanism of the present invention after removing the pulling component.

[0035] Figure 7 It is a three-dimensional structural schematic diagram of the prying and pulling mechanism of the present invention after removing the pulling component and the reciprocating prying component.

[0036] In the figure: 1, bottom frame; 2, top frame; 3, prying mechanism; 31, pulling assembly; 311, motor 1; 312, guide rod 1; 313, transmission screw; 314, moving frame; 315, mounting frame; 316, telescopic plate; 32, electric push rod 1; 33, reciprocating prying assembly; 331, support block; 332, slide rod 1; 333, movable frame; 334, half gear; 335, rack; 336, motor 2; 34, connecting column; 35, support plate; 36, electric push rod 2; 37, press knife; 38, pry knife; 381, limit component; 3811, rack 1; 3812, support plate; 3813, mounting plate; 3814, linkage gear; 3815, rack 2; 3816, cross plate; 3817, top plate; 3818, miter plate; 382, ​​buffer component; 3821, movable rod; 3822, spring; 4, locking mechanism; 41, movable arc frame; 42, end arc frame; 43, connecting plate; 44, sliding rod 2; 45, connecting frame; 46, two-way electric push rod; 47, tightening assembly; 471, guide rod 2; 472, movable plate; 473, two-way threaded rod; 474, motor 3; 48, rib plate. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0038] See also Figure 1A device for detecting the anti-corrosion performance of the anti-corrosion layer of a reinforced ring steel pipe comprises a base frame 1 and a top frame 2 fixedly connected to the top of the base frame 1, wherein a locking mechanism 4 for locking the reinforced ring steel pipe is arranged inside the base frame 1, and a prying and pulling mechanism 3 for prying and pulling the anti-corrosion layer on the surface of the reinforced ring steel pipe is arranged at the center of the top frame 2.

[0039] See also Figure 1 , Figure 2 and Figure 3 The locking mechanism 4 includes a connecting plate 43 which is symmetrical and movable inside the base frame 1. A tightening component 47 for controlling the change of the distance between the two is commonly provided on the connecting plates 43 on the left and right sides. The front and rear ends of the connecting plate 43 are symmetrically fixedly connected with the end arc frames 42. A sliding rod 2 44 is fixedly connected between the upper and lower ends of the end arc frames 42 on the front and rear sides. Two movable arc frames 41 distributed front and back are commonly provided on the upper and lower corresponding sliding rods 2 44. Two bidirectional electric push rods 46 symmetrical in upper and lower directions are fixedly connected to the movable arc frame 41. An arc-shaped rib plate 48 is commonly fixedly connected to the output ends on the same side of the two bidirectional electric push rods 46 on the same movable arc frame 41 through a connecting frame 45. The movable arc frame 41, the end arc frame 42 and the rib plate 48 are coaxial.

[0040] During specific operation, the two adjacent rib plates 48 are controlled by the bidirectional electric push rod 46 to tighten the ribs of the reinforced ring steel pipe at the front and rear sides. By tightening the two ribs on the reinforced ring steel pipe, the position of the reinforced ring steel pipe is locked.

[0041] See also Figure 1 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The prying and pulling mechanism 3 includes a prying knife 38 movably arranged above the opening of the anti-corrosion layer of the reinforced ring steel pipe, a pressing knife 37 movably arranged above the prying knife 38, the pressing knife 37 is fixedly connected to the output end of the electric push rod 2 36, the electric push rod 2 36 is fixedly connected to the support plate 35, and a connecting column 34 is fixedly connected to the upper side of the support plate 35. A reciprocating prying assembly 33 for controlling the prying knife 38 to move back and forth to pry the front side of the opening of the anti-corrosion layer of the reinforced ring steel pipe is arranged on the upper end of the connecting column 34. A pulling assembly 31 for controlling the pressing knife 37 and the prying knife 38 to move forward synchronously is arranged on the upper end of the reciprocating prying assembly 33. The pulling assembly 31 includes a mounting frame 315, and the upper side of the mounting frame 315 is fixedly connected to the output end of a plurality of electric push rods 32, and the electric push rods 32 are fixedly connected to the top frame 2.

[0042] During the specific operation, the electric push rod 1 32 controls the prying knife 38 to be lowered into the opening of the anti-corrosion layer of the reinforced ring steel pipe, and the electric push rod 2 36 controls the pressing knife 37 to close with the prying knife 38 to press the anti-corrosion layer to be pried. The locking mechanism 4 and the prying mechanism 3 are used in conjunction to automatically complete the adhesion test of the anti-corrosion layer of the reinforced ring steel pipe.

[0043] See also Figure 1 , Figure 2 and Figure 3 The tightening assembly 47 includes a movable plate 472 which is symmetrically fixedly connected to the connecting plate 43 frontally and rearly, and two movable plates 472 which are symmetrically distributed left and right are commonly threadedly connected to the bidirectional threaded rod 473 and slidably connected to the guide rod 2 471. The two movable plates 472 on the same bidirectional threaded rod 473 are respectively threadedly connected to two threaded sections with opposite thread directions on the bidirectional threaded rod 473. The bidirectional threaded rod 473 is rotatably connected between the left and right side walls of the base frame 1, and the guide rod 2 471 is fixedly connected between the left and right side walls of the base frame 1. The same ends of the two bidirectional threaded rods 473 extend to the outside of the base frame 1 and are connected through a synchronous belt drive. One end of any bidirectional threaded rod 473 is also fixedly connected to the output end of the motor 3 474, and the motor 3 474 is fixedly connected to the outer wall of the base frame 1.

[0044] During specific operation, the motor 3 474 is used to control the rotation of any one of the bidirectional threaded rods 473, and the synchronous belt drives the other bidirectional threaded rod 473 to rotate synchronously. The two bidirectional threaded rods 473 respectively drive the two connected movable plates 472 to move closer to or away from each other, and the movable plate 472 drives the connecting plate 43 and the movable arc frame 41 to tighten the reinforced ring steel pipe.

[0045] See also Figure 2 The two bidirectional threaded rods 473 are diagonally distributed. In specific operation, the diagonal distribution arrangement can ensure that the moving plate 472 and the connecting plate 43 are subjected to balanced forces up and down, improve the overall structural movement stability and overall structural strength, and thus help improve the subsequent stability of the reinforcement ring steel pipe locking.

[0046] See also Figure 2 The movable arc frame 41 is slidably connected with the corresponding sliding rod 44, and a plurality of positioning holes are opened on the sliding rod 44. The end of the movable arc frame 41 connected to the sliding rod 44 is threadedly connected with a locking bolt, and the locking bolt cooperates with the corresponding positioning hole.

[0047] During specific operation, the locking bolts are loosened to allow the movable arc frame 41 to slide freely on the slide bar 44. According to the length of the reinforced ring steel pipe to be tested, two reinforced rings with appropriate spacing can be selected for clamping and limiting, so that the two clamping limit points are reasonably distributed on the reinforced ring steel pipe, that is, the force points of the reinforced ring steel pipe are evenly and symmetrically distributed, thereby ensuring the clamping stability of the reinforced ring steel pipe. After the adjustment is completed, the movable arc frame 41 is locked on the slide bar 44 by the locking bolts.

[0048] See also Figure 1 , Figure 3 and Figure 4 The pulling assembly 31 also includes a transmission screw 313 rotatably connected between the front and rear side walls of the mounting frame 315, and a guide rod 312 fixedly connected between the front and rear side walls of the mounting frame 315. A movable frame 314 is threadedly connected to the transmission screw 313, and the movable frame 314 is also slidably connected to the guide rod 312. One end of the transmission screw 313 extends to the outside of the mounting frame 315 and is fixedly connected to the output end of the motor 311. The motor 311 is fixedly connected to the outer wall of the mounting frame 315. The upper ends of the left and right sides of the movable frame 314 are hinged with telescopic plates 316, and the upper ends of the telescopic plates 316 are hinged with sliders, which are slidably connected to the top inner wall of the top frame 2.

[0049] During specific operation, the transmission screw 313 is driven to rotate by the motor 311, and the transmission screw 313 drives the moving frame 314 to move along the guide rod 312, and the moving frame 314 drives the pressing knife 37 and the prying knife 38 to move forward through the connecting column 34 and the support plate 35 to pry the anti-corrosion layer; when the moving frame 314 moves downward, the telescopic plate 316 will be stretched synchronously, and at the same time, the angle between the telescopic plate 316 and the side of the moving frame 314 will change, but the telescopic plate 316, the moving frame 314, and the top frame 2 always form a triangular structure, and the overall structural strength and movement stability are improved; when the moving frame 314 moves forward and backward, it will drive the telescopic plate 316 to move synchronously, and the slider at the upper end of the telescopic plate 316 slides along the top inner wall of the top frame 2, and the telescopic plate 316 can protect the transmission screw 313 from being subjected to force, so as to prevent the transmission screw 313 from being used as a force-bearing member.

[0050] See also Figure 4 , Figure 5 , Figure 6 and Figure 7The reciprocating prying assembly 33 includes a support block 331 symmetrically fixedly connected to the bottom of the mobile frame 314, and a slide bar 332 is slidably connected to the support blocks 331 on both sides of the front and rear sides. A movable frame 333 is fixedly connected between the slide bars 332 on both sides. The inner sides of the upper and lower walls of the movable frame 333 are both provided with a gear rail 335, and a half gear 334 is provided between the gear rails 335 on both sides. At the same time, the half gear 334 is only meshed with one side of the gear rail 335, and the half gear 334 is rotatably connected to the mobile frame 314 through a rotating rod. At the bottom, the rotating rod is connected to the output end of the second motor 336 through a synchronous belt, the second motor 336 is fixedly connected in the movable frame 314, the lower center of the movable frame 333 is fixedly connected to the connecting column 34, the lower end of the connecting column 34 is fixedly connected to a mounting plate 3813 located behind the pressing knife 37, a buffer component 382 for buffering the prying of the prying knife 38 is arranged between the mounting plate 3813 and the prying knife 38, and a limiting component 381 for limiting the activity of the prying knife 38 is arranged between the pressing knife 37 and the prying knife 38.

[0051] During operation, the motor 2 336 drives the synchronous belt to control the rotating rod to drive the half gear 334 to rotate. The half gear 334 is alternately connected to the racks 335 on both sides to control the movable frame 333 to move back and forth under the movable frame 314, thereby controlling the prying tool 38 to move back and forth.

[0052] See also Figure 6 and Figure 7 The buffer component 382 includes a plurality of movable rods 3821 fixedly connected to the rear end of the pry tool 38. The plurality of movable rods 3821 are all slidable and penetrate the lower side of the mounting plate 3813. The rear end of the movable rods 3821 is fixedly connected to a limiting plate. A spring 3822 sleeved on the outside of the movable rods 3821 is connected between the rear end of the pry tool 38 and the front end of the mounting plate 3813.

[0053] During operation, the spring 3822 is used to cushion the prying tool 38 to avoid the prying getting stuck and to avoid the gear slipping of the rack 335 and the half gear 334, thereby reducing the wear of the rack 335 and the half gear 334.

[0054] See also Figure 6 and Figure 7, the limiting member 381 includes support plates 3812 symmetrically and fixedly connected to the rear side of the mounting plate 3813. A transverse connecting plate 3816 is fixedly connected to the lower side of the support plate 3812. A second rack 3815 is slidably and limit-connected between the two transverse connecting plates 3816. A top plate 3817 is fixedly connected to the front side of the second rack 3815. The top plate 3817 and the pry bar 38 are at the same height and both are lower than the second rack 3815. An inclined connecting plate 3818 inclined upward at 45° is fixedly connected to the front side of the support plate 3812. A through hole for the inclined connecting plate 3818 to pass through is formed in the mounting plate 3813. A number of linkage gears 3814 are rotatably connected between the two inclined connecting plates 3818. The number of linkage gears 3814 is at least four and is an even number. The linkage gears 3814 are sequentially meshed and connected. The front side of the uppermost linkage gear 3814 is meshed and connected to a first rack 3811. The first rack 3811 is fixedly connected to the rear end of the pressing knife 37. The lower side of the lowermost linkage gear 3814 is meshed and connected to the second rack 3815.

[0055] During specific operation, when the pressing knife 37 moves downward, it will synchronously drive the first rack 3811 to move downward. The first rack 3811 drives the uppermost linkage gear 3814 to rotate clockwise. Through the meshing connection of multiple linkage gears 3814, the lowermost linkage gear 3814 is driven to rotate counterclockwise. The lowermost linkage gear 3814 drives the second rack 3815 to move forward. The second rack 3815 drives the top plate 3817 to move forward to perform movable limit on the pry bar 38, reducing the movable range of the pry bar 38, so as to ensure that the pry bar 38 can be nearly corresponding to the pressing knife 37, ensuring the clamping of the anticorrosive layer of the steel pipe with stiffening rings; setting the top plate 3817 and the pry bar 38 to the same height and both lower than the second rack 3815 is to avoid interference between the first rack 3811 and the second rack 3815.

[0056] Refer to Figure 6 , the number of the linkage gears 3814 is at least four and is an even number. During specific operation, through the meshing connection of multiple linkage gears 3814, the distance between the pry bar 38 and the pressing knife 37 can be increased, avoiding the situation that the anticorrosive layer of the steel pipe with stiffening rings cannot enter between the pry bar 38 and the pressing knife 37. Setting the number of linkage gears 3814 as an even number can ensure that when the first rack 3811 moves downward, the second rack 3815 can move forward.

[0057] Refer to Figure 1-Figure 7 , the present invention also provides a method for detecting the anticorrosive performance of the anticorrosive layer of a steel pipe with stiffening rings, including the following steps: Step 1: Place the steel pipe with stiffening rings into a heating pool, add enough water to fully submerge the steel pipe with stiffening rings and heat it. The heating temperature is 75°C ± 3°C and the heating time is at least 48h, or the heating temperature is 95°C ± 3°C and the heating time is 24h, and then take out the steel pipe with stiffening rings.

[0058] Step 2: When the reinforced ring steel pipe is still warm, immediately use a knife to cut a rectangular opening of approximately 15mmx30mm on the anti-corrosion layer. The knife mark must penetrate the anti-corrosion layer to reach the base pipe.

[0059] Step 3: After the temperature of the reinforced ring steel pipe is naturally cooled to 20℃±3℃ in the air, the reinforced ring steel pipe is placed in the performance testing device for testing. The testing is divided into the following steps: S1: Place the reinforced ring steel pipe into the base frame 1, so that the opening of the anti-corrosion layer of the reinforced ring steel pipe faces upward and corresponds to the position of the prying knife 38, then loosen the locking bolts to allow the movable arc frame 41 to slide freely on the slide rod 2 44, select two reinforced rings with appropriate spacing according to the length of the reinforced ring steel pipe, and move the arc frame 41 relative to the corresponding rib rings. Finally, the movable arc frame 41 is locked by the locking bolts, and then the motor 474 is used to control any one of the two-way threaded rods 473 to rotate, and the synchronous belt drives the other two-way threaded rod 473 to rotate synchronously, and the two two-way threaded rods 473 respectively drive the two connected movable plates 472 to move closer to or away from each other, and the movable plates 472 drive the movable arc frame 41 to tighten the reinforced ring steel pipe. At the same time, the two two-way electric push rods 46 are used to control the two rib plates 48 to tighten the front and rear sides of the reinforced ring of the reinforced ring steel pipe.

[0060] S2: The electric push rod 1 32 is used to control the prying tool 38 to be lowered into the opening of the anti-corrosion layer of the reinforced ring steel pipe, and then the motor 2 336 drives the synchronous belt to control the rotating rod to drive the half gear 334 to rotate. The half gear 334 is alternately connected to the racks 335 on both sides to control the movable frame 333 to move back and forth on the lower side of the movable frame 314. The movable frame 333 drives the prying tool 38 to move back and forth to pry the anti-corrosion layer of the reinforced ring steel pipe, and the spring 3822 is used to buffer the prying of the prying tool 38.

[0061] S3: After a part of the anti-corrosion layer of the reinforced ring steel pipe is pried up, the electric push rod 2 36 is used to control the pressing knife 37 to move down and close with the prying knife 38 to clamp the pried anti-corrosion layer. When the pressing knife 37 moves down, it will synchronously drive the rack 1 3811 to move downward, and the rack 1 3811 drives the upper end linkage gear 3814 to rotate clockwise, and the lower end linkage gear 3814 is meshed and connected through multiple linkage gears 3814 to drive the counterclockwise rotation, thereby driving the rack 2 3815 to move forward, and the rack 2 3815 drives the top plate 3817 to move forward to limit the prying knife 38, and then the motor 1 311 drives the transmission screw 313 to rotate, and the transmission screw 313 drives the moving frame 314 to move along the guide rod 1 312, and the moving frame 314 drives the pressing knife 37 and the prying knife 38 to move forward through the connecting column 34 and the support plate 35 to pull the anti-corrosion layer forward.

[0062] Step 4: Evaluate the adhesion grade of the coating according to the following grading standards.

[0063] Grade 1 - The coating cannot be removed by prying.

[0064] Level 2 - Less than or equal to 50% of the coating has been lifted off.

[0065] Level 3 - The coating is peeled off by more than 50%, but the coating shows obvious resistance to peeling.

[0066] Level 4 - The coating can be easily pried off into strips or large pieces.

[0067] Grade 5 - The coating is peeled off in one piece.

[0068] 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 anti-corrosion performance of an anti-corrosion layer of a reinforced ring steel pipe, comprising a base frame and a top frame fixedly connected to the top of the base frame, characterized in that: A locking mechanism for locking the reinforced ring steel pipe is arranged inside the bottom frame, and a prying and pulling mechanism for prying and pulling the anti-corrosion layer on the surface of the reinforced ring steel pipe is arranged in the center of the top frame; The locking mechanism comprises a connecting plate which is symmetrical and movablely arranged inside the bottom frame, and a tightening assembly for controlling the change of the distance between the two is commonly arranged on the connecting plates on the left and right sides, and the front and rear ends of the connecting plate are symmetrically fixedly connected with the end arc frames, and the upper and lower ends of the end arc frames on the front and rear sides are fixedly connected with two sliding rods, and the upper and lower corresponding sliding rods are commonly arranged with two front-to-back distributed moving arc frames, and the moving arc frames are fixedly connected with two upper and lower symmetrical bidirectional electric push rods, and the same side output ends of the two bidirectional electric push rods on the same moving arc frame are commonly fixedly connected with an arc-shaped rib plate through the connecting frame, and the moving arc frame, the end arc frame and the rib plate are coaxial; The prying and pulling mechanism includes a prying knife movably arranged just above the opening of the anti-corrosion layer of the reinforced ring steel pipe, a pressing knife movably arranged above the prying knife, the pressing knife is fixedly connected to the output end of the second electric push rod, the second electric push rod is fixedly connected to the support plate, a connecting column is fixedly connected to the upper side of the support plate, a reciprocating prying assembly for controlling the prying knife to reciprocate forward and backward to pry the front side of the opening of the anti-corrosion layer of the reinforced ring steel pipe is arranged on the upper end of the connecting column, a pulling assembly for controlling the pressing knife and the prying knife to move forward synchronously is arranged on the upper end of the reciprocating prying assembly, and the pulling assembly includes a mounting frame, the upper side of the mounting frame is fixedly connected to the output end of a plurality of electric push rods, and the electric push rod is fixedly connected to the top frame; The tightening assembly includes a movable plate which is symmetrically fixedly connected to the connecting plate frontally and rearly, two movable plates symmetrically distributed leftward and rightward are threadedly connected to the bidirectional threaded rod and slidably connected to guide rod 2, the two movable plates on the same bidirectional threaded rod are respectively threadedly connected to two threaded sections with opposite thread directions on the bidirectional threaded rod, the bidirectional threaded rod is rotatably connected between the left and right side walls of the base frame, guide rod 2 is fixedly connected between the left and right side walls of the base frame, the same ends of the two bidirectional threaded rods extend to the outside of the base frame and are connected through synchronous belt drive, one end of any bidirectional threaded rod is also fixedly connected to the output end of motor three, and motor three is fixedly connected to the outer side wall of the base frame.

2. The device for detecting the anti-corrosion performance of the anti-corrosion layer of a reinforced ring steel pipe according to claim 1 is characterized in that: The pulling assembly also includes a transmission screw rotatably connected between the front and rear side walls of the mounting frame, and a guide rod 1 fixedly connected between the front and rear side walls of the mounting frame. The transmission screw is threadedly connected to a moving frame, and the moving frame is also slidably connected to the guide rod 1. One end of the transmission screw extends to the outside of the mounting frame and is fixedly connected to the output end of motor 1. Motor 1 is fixedly connected to the outer wall of the mounting frame. The upper ends of the left and right sides of the moving frame are hinged with telescopic plates, and the upper ends of the telescopic plates are hinged with sliders, which are slidably connected to the top inner wall of the top frame.

3. The device for detecting the anti-corrosion performance of the anti-corrosion layer of a reinforced ring steel pipe according to claim 1 is characterized in that: The reciprocating prying assembly includes supporting blocks that are symmetrically fixedly connected to the bottom of the moving frame front and back, and sliding rods 1 are slidably connected to the supporting blocks on both sides of the front and rear sides, and a movable frame is fixedly connected between the sliding rods 1 on both sides, and the inner sides of the upper and lower walls of the movable frame are provided with racks, and a half gear is provided between the racks on both sides. At the same time, the half gear is only meshed with the rack on one side, and the half gear is rotatably connected to the bottom of the moving frame through a rotating rod, and the rotating rod is transmission-connected to the output end of the motor 2 through a synchronous belt, and the motor 2 is fixedly connected in the moving frame, and the lower center of the movable frame is fixedly connected to the connecting column, and the lower end of the connecting column is fixedly connected to a mounting plate located behind the pressing knife, and a buffer component for buffering the prying of the prying knife is provided between the mounting plate and the prying knife, and a limiting component for limiting the movable position of the prying knife is provided between the pressing knife and the prying knife.

4. The device for detecting the anti-corrosion performance of the anti-corrosion layer of a reinforced ring steel pipe according to claim 3 is characterized in that: The buffer component includes a plurality of movable rods fixedly connected to the rear end of the prying tool, the plurality of movable rods are slidably and penetrated and installed on the lower side of the mounting plate, the rear end of the movable rods is fixedly connected to the limiting plate, and a spring sleeved on the outside of the movable rods is connected between the rear end of the prying tool and the front end of the mounting plate.

5. The device for detecting the anti-corrosion performance of the anti-corrosion layer of a reinforced ring steel pipe according to claim 3 is characterized in that: The limiting component includes a support plate that is symmetrically fixedly connected to the rear side of the mounting plate, a cross-connecting plate is fixedly connected to the lower side of the support plate, a rack two is slidably and limitatively connected between the cross-connecting plates on both sides, a top plate is fixedly connected to the front side of the rack two, the top plate and the prying tool are at the same height and are both lower than the rack two, a miter plate that is inclined upward at degrees is fixedly connected to the front side of the support plate, a through hole is provided on the mounting plate for the miter plate to pass through, a number of linkage gears are rotatably connected between the miter plates on both sides, and the number of linkage gears are meshed and connected in sequence, the front side of the uppermost linkage gear is meshed and connected with rack one, the rack one is fixedly connected to the rear end of the press knife, and the lower side of the lowermost linkage gear is meshed and connected with rack two.

6. The device for detecting the anti-corrosion performance of the anti-corrosion layer of a reinforced ring steel pipe according to claim 1 is characterized in that: The movable arc frame is slidably connected with the corresponding sliding rod 2, a plurality of positioning holes are provided on the sliding rod 2, and the end portion where the movable arc frame is connected with the sliding rod 2 is threadedly connected with a locking bolt, which cooperates with the corresponding positioning hole.

7. The device for detecting the anti-corrosion performance of the anti-corrosion layer of a reinforced ring steel pipe according to claim 1 is characterized in that: The front and rear two bidirectional threaded rods are diagonally distributed.

8. A method for detecting the anti-corrosion performance of the anti-corrosion layer of a reinforced ring steel pipe, characterized in that: The method is completed by using the anti-corrosion performance detection device of the anti-corrosion layer of the reinforced ring steel pipe as claimed in claim 1, and specifically includes the following steps: Step 1: Place the reinforced ring steel pipe in the heating pool, add enough water to fully submerge the reinforced ring steel pipe and heat it. The heating temperature is 75℃±3℃ and the heating time is at least 48h, or the heating temperature is 95℃±3℃ and the heating time is 24h, and then take out the reinforced ring steel pipe; Step 2: When the reinforced ring steel pipe is still warm, immediately use a knife to cut a rectangular opening on the coating. The knife mark should penetrate the coating to the base pipe; Step 3: After the temperature of the reinforced ring steel pipe is naturally cooled to 20℃±3℃ in the air, the reinforced ring steel pipe is placed in the anti-corrosion layer anti-corrosion performance testing device for anti-corrosion layer performance testing; Step 4: Evaluate the adhesion level of the coating inside the rectangle.

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