Power station boiler water-cooled wall welding seam far-field eddy current detection device

Abstract

The utility model discloses a far-field eddy current detection device for a weld joint of a water cooling wall of a power station boiler, and relates to the technical field of far-field eddy current detection equipment. The device comprises a main frame, and a detection unit is arranged in the main frame and used for detecting the weld joints on the surfaces of the water cooling wall pipelines of the power station boilers with different diameters. The detection unit comprises a driving unit which is arranged in the main frame and is used for providing kinetic energy for the operation of the adaptive unit; the adaptation unit is arranged outside the driving unit and comprises a set of triangular sliding plates installed on the surface of the main frame sliding rod in a sliding mode, the two triangular sliding plates can be driven to move oppositely through operation of the adaptation unit and the driving unit, and the triangular sliding plates push the first supporting rod and the second supporting rod to rotate and expand outwards in an arc mode through an adjusting assembly. And the auxiliary roller and the driving roller are contacted with the inner wall of the power station boiler water-cooled wall tube, so that the welding seam detection of the power station boiler water-cooled wall tubes with different diameters is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to far field eddy current testing equipment technical field, concretely is a kind of power station boiler water wall weld far field eddy current testing device. BACKGROUND

[0002] Eddy current testing (ECT) is a kind of nondestructive testing technology based on electromagnetic induction principle, through alternating current in probe generates alternating magnetic field, and the defect object is interacted, and then generates eddy current. The change of eddy current reflects the defect, corrosion or geometric shape of material. Because of its non-contact nature, eddy current testing is widely used in aviation, aerospace, nuclear power, electric power and other industries, especially suitable for detecting metal surface or near-surface defects, such as cracks and corrosion. In power station boiler, the weld of water wall tube often produces tiny defects due to thermal stress or corrosion, and traditional detection method is difficult to find, while eddy current testing can efficiently and accurately detect these surface defects, so as to ensure the safe operation of equipment, reduce maintenance cost and improve reliability.

[0003] According to the patent name: a kind of boiler water wall pipe defect eddy current testing device (patent publication number is: CN115308300A, patent publication date is: 2022-11-08), including butt joint shell, butt joint shell one end is equipped with coil automatic butt joint assembly, butt joint shell is connected together by coil automatic butt joint assembly, butt joint shell outer wall middle part is equipped with butt joint clamping assembly, butt joint shell one end face is equipped with split butt joint type eddy current testing assembly, butt joint clamping assembly is equipped with pipe wall outer cutting automatic crawling mechanism, pipe wall outer cutting automatic crawling mechanism includes self-adapting outer cutting pressure assembly and walking transmission assembly, self-adapting outer cutting pressure assembly is equipped on butt joint clamping assembly, walking transmission assembly is equipped on self-adapting outer cutting pressure assembly. It is a semi-open type semi-ring detection coil, without cutting pipe, the detection can be completed, and the pipe wall outer cutting automatic crawling mechanism is used to automatically adapt to different pipe diameters, automatically crawl on the outer wall of pipe wall, and automatically complete the damage detection of large water wall pipe.

[0004] And based on the above prior art, the existing power station boiler water wall weld far field eddy current testing device still has the following problems, the diameter of power station boiler water wall pipe on the market is not fixed, while the diameter of power station boiler water wall weld far field eddy current testing device is mostly fixed, it is difficult to detect power station boiler water wall weld of different diameter, therefore, the utility model provides a kind of power station boiler water wall weld far field eddy current testing device. UTILITY MODEL CONTENT

[0005] The utility model provides a kind of electric station boiler water cooling wall weld far-field eddy current detection device, solve the following problems that still exist in the prior art electric station boiler water cooling wall weld far-field eddy current detection device, the diameter of electric station boiler water cooling wall pipe on market is not fixed, however the diameter of electric station boiler water cooling wall weld far-field eddy current detection device is mostly fixed, it is difficult to detect electric station boiler water cooling wall weld of different diameter size.

[0006] To achieve the above object, the utility model is realized by the following technical scheme: a kind of electric station boiler water cooling wall weld far-field eddy current detection device, including main frame, the left end of the main frame is fixedly installed with fixed seat, and detection probe is fixedly installed in the inside of fixed seat, the inside of the main frame is provided with detection unit for detecting the surface of electric station boiler water cooling wall pipe of different diameters, including in detection unit:

[0007] drive unit is arranged in the inside of main frame, and is used to provide kinetic energy for the operation of adaptation unit;

[0008] adaptation unit is arranged outside drive unit, including a group of triangular slide plates slidingly installed on the surface of the main frame slide rod, two first support rods are movably installed on the lower side of the triangular slide plate by adjusting assembly, one end of the first support rod is fixedly installed with auxiliary roller, and the upper side of the triangular slide plate is movably installed with second support rod by adjusting assembly, one end of the second support rod is fixedly installed with roller holder, and drive roller is rotatably installed in the inside of roller holder, the rotation of first support rod and second support rod is realized by the sliding of triangular slide plate through adjusting assembly, and the surface detection of electric station boiler water cooling wall pipe of different diameters is realized.

[0009] Preferably, the inner shaft of the drive roller is fixedly installed with second bevel gear at one end and penetrates the roller holder, the side of the second support rod is fixedly installed with fixed frame, the inside of the fixed frame is fixedly installed with walking motor, and the output end of the walking motor is fixedly installed with first bevel gear and penetrates the fixed frame, and the first bevel gear is meshingly installed with the second bevel gear.

[0010] Preferably, the adjusting assembly includes telescopic pipes rotatably installed on the side of triangular slide plate, telescopic rod is slidingly installed in the inside of telescopic pipe, one end of the telescopic rod is rotatably connected with first support rod and second support rod respectively, and spring is fixedly installed in the inside of telescopic pipe.

[0011] Preferably, limit slot is formed in the side of telescopic pipe, limit block is fixedly installed on the side of telescopic rod, and the limit block is slidingly positioned in the inside of limit slot to limit the movement of telescopic rod.

[0012] Preferably, the driving unit comprises left and right triangular plates fixedly installed on the surface of the sliding rod of the main frame, and the first and second support rods are rotatably connected to the ends of the left and right triangular plates respectively, the inner side of the right triangular plate is fixedly installed with a driving motor, the output end of the driving motor penetrates through the right triangular plate and is fixedly installed with a first lead screw, the surface of the first lead screw is fixedly installed with a first driving gear, the surface of the first lead screw is threadedly installed with a first threaded sleeve, the outer side of the left triangular plate is rotatably installed with a second lead screw, the surface of the second lead screw is fixedly installed with a second threaded sleeve, the outer sides of the first and second threaded sleeves are fixedly connected with a triangular slide plate, the surface of the second lead screw is threadedly installed with a second threaded sleeve, and the first driving gear rotates to realize synchronous rotation of the second driving gear through the linkage assembly.

[0013] Preferably, the linkage assembly comprises a rotating shaft rotatably installed in the left and right triangular plates, the right end of the rotating shaft is fixedly installed with a first linkage gear, the left end of the first linkage gear is fixedly installed with a second linkage gear, and the first linkage gear is meshingly installed with the first driving gear, and the second linkage gear is meshingly installed with the second driving gear.

[0014] The utility model provides a kind of electric station boiler water cooling wall weld far-field eddy current detection device.Compared with prior art, the following beneficial effects are achieved:

[0015] 1、The electric station boiler water cooling wall weld far-field eddy current detection device is provided with an adaptive unit, which drives the two triangular slides to move towards each other, and the triangular slides push the first and second support rods to rotate outward in an arc shape through the adjusting assembly, so that the auxiliary roller and the driving roller come into contact with the inner wall of the electric station boiler water cooling wall pipe, thereby realizing the detection of the weld of the electric station boiler water cooling wall pipe with different diameters.

[0016] 2、The electric station boiler water cooling wall weld far-field eddy current detection device is provided with an adjusting assembly, which allows the first and second support rods to retract in an arc shape through the extension rod and the compression spring when the driving roller and the auxiliary roller pass through uneven welds, thereby adjusting the length between the telescopic pipe and the extension rod, and preventing the driving roller and the auxiliary roller from being stuck when passing through uneven welds. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a front view of the utility model;

[0018] Figure 2 It is a driving unit of the utility model;

[0019] Figure 3 It is an adaptive unit of the utility model;

[0020] Figure 4 It is a split three-dimensional structure diagram of the adjusting assembly of the utility model.

[0021] In the figure: 1-main frame, 2-detection unit, 21-driving unit, 211-left triangular plate, 212-right triangular plate, 213-driving motor, 214-first screw rod, 215-first driving gear, 216-first threaded sleeve, 217-second screw rod, 218-second linkage gear, 219-second threaded sleeve, 22-adaptation unit, 221-triangular slide plate, 222-first support rod, 223-assistant roller, 224-second support rod, 225-fixed frame, 226-walking motor, 227-first bevel gear, 228-roller frame, 229-driving roller, 2210-second bevel gear, 3-linkage assembly, 31-rotation shaft, 32-first linkage gear, 33-second linkage gear, 4-adjustment assembly, 41-telescopic pipe, 42-spring, 43-telescopic rod, 44-limiting groove, 45-limiting block, 5-fixed seat, 6-detection probe. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] Please refer to Figures 1-4 The present application provides a technical solution:

[0024] A kind of electric station boiler water wall weld far field eddy current detection device, including main frame 1, the left end of main frame 1 is fixedly installed with fixed seat 5, and detection probe 6 is fixedly installed in the inside of fixed seat 5, the inside of main frame 1 is provided with detection unit 2 for detecting the surface of different diameter electric station boiler water wall pipe, including in detection unit 2:

[0025] Driving unit 21 is arranged in the inside of main frame 1, and is used to provide kinetic energy for the operation of adaptation unit 22;

[0026] The adaptive unit 22 is arranged outside the driving unit 21, comprising a set of triangular slides 221 slidingly installed on the surface of the slide rod of the main frame 1, two first supporting rods 222 movably installed below the triangular slides 221 through the adjusting assembly 4, one end of the first supporting rod 222 fixedly installed with an auxiliary roller 223, and a second supporting rod 224 movably installed above the triangular slides 221 through the adjusting assembly 4, one end of the second supporting rod 224 fixedly installed with a roller frame 228, and the driving roller 229 rotatably installed inside the roller frame 228, the triangular slides 221 slidingly passing through the adjusting assembly 4 to realize the rotation outward expansion and inward retraction of the first supporting rod 222 and the second supporting rod 224, and realize the surface detection of the power plant boiler water wall pipe with different diameters.

[0027] In the embodiment, one end of the inner shaft of the driving roller 229 penetrates the roller frame 228 and is fixedly installed with a second bevel gear 2210, one side of the second supporting rod 224 is fixedly installed with a fixed frame 225, the inside of the fixed frame 225 is fixedly installed with a walking motor 226, and the output end of the walking motor 226 penetrates the fixed frame 225 and is fixedly installed with a first bevel gear 227, and the first bevel gear 227 is meshingly installed with the second bevel gear 2210.

[0028] The model of the walking motor 226 is KV3SF-8521F-WR, which is electrically connected with an external power supply and realizes start-stop operation through a personnel control panel, the driving unit 21 drives the two triangular slides 221 to move towards each other, the triangular slides 221 push the first supporting rod 222 and the second supporting rod 224 to rotate outwardly in an arc shape through the adjusting assembly 4, so that the auxiliary roller 223 and the driving roller 229 contact the inner wall of the power plant boiler water wall pipe, thereby realizing the detection of the power plant boiler water wall pipe weld with different diameters, the walking motor 226 is operated to drive the first bevel gear 227 to rotate, the first bevel gear 227 drives the second bevel gear 2210 to rotate, the second bevel gear 2210 drives the driving roller 229 to rotate, so that the device walks on the surface of the power plant boiler water wall pipe.

[0029] In the embodiment, the adjusting assembly 4 comprises telescopic pipes 41 rotatably installed on the side surfaces of the triangular slides 221, the inside of the telescopic pipe 41 is slidingly installed with a telescopic rod 43, one end of the telescopic rod 43 is rotatably connected with the first supporting rod 222 and the second supporting rod 224 respectively, and the inside of the telescopic pipe 41 is fixedly installed with a spring 42.

[0030] When the driving roller 229 and the auxiliary roller 223 pass through uneven welds, the first supporting rod 222 and the second supporting rod 224 are arc-shaped inwardly retracted to press the spring 42 through the telescopic rod 43, so that the length between the telescopic pipe 41 and the telescopic rod 43 is adjustable, thereby avoiding the driving roller 229 and the auxiliary roller 223 from being stuck when passing through uneven welds.

[0031] In the embodiment, the side of the telescopic pipe 41 is provided with a limiting groove 44, and the side of the telescopic rod 43 is fixedly provided with a limiting block 45 which is slidably arranged in the limiting groove 44 to limit the movement of the telescopic rod 43.

[0032] The movement of the telescopic rod 43 is limited by the sliding of the limiting block 45 in the limiting groove 44.

[0033] In the embodiment, the driving unit 21 comprises a left triangular plate 211 and a right triangular plate 212 which are fixedly arranged on the surface of the slide rod of the main frame 1, and a first supporting rod 222 and a second supporting rod 224 are rotatably connected to the ends of the left triangular plate 211 and the right triangular plate 212 respectively. The inner side of the right triangular plate 212 is fixedly provided with a driving motor 213, the output end of the driving motor 213 penetrates through the right triangular plate 212 and is fixedly provided with a first screw rod 214, the surface of the first screw rod 214 is fixedly provided with a first driving gear 215, the surface of the first screw rod 214 is threadedly provided with a first threaded sleeve 216, the outer side of the left triangular plate 211 is rotatably provided with a second screw rod 217, the surface of the second screw rod 217 is fixedly provided with a second threaded sleeve 219, the outer sides of the first threaded sleeve 216 and the second threaded sleeve 219 are fixedly connected with a triangular slide plate 221, the surface of the second screw rod 217 is threadedly provided with the second threaded sleeve 219, and the first driving gear 215 is rotatably connected with the second driving gear 218 through the linkage assembly 3.

[0034] The model of the driving motor 213 is KV3SF-8521F-WR, which is electrically connected with an external power supply and is controlled to be turned on or off through a control panel controlled by a person. The driving motor 213 drives the first driving gear 215 and the first screw rod 214 to rotate, the first driving gear 215 drives the rotating shaft 31 and the second linkage gear 33 to rotate through the first linkage gear 32, the second linkage gear 33 drives the second screw rod 217 to rotate through the second driving gear 218, and the first screw rod 214 and the second screw rod 217 drive the first threaded sleeve 216 and the second threaded sleeve 219 to move towards each other, thereby driving the two triangular slide plates 221 to move towards each other.

[0035] In the embodiment, the linkage assembly 3 comprises a rotating shaft 31 rotatably arranged in the left triangular plate 211 and the right triangular plate 212, the right end of the rotating shaft 31 is fixedly provided with a first linkage gear 32, the left end of the first linkage gear 32 is fixedly provided with a second linkage gear 33, the first linkage gear 32 is meshingly arranged with the first driving gear 215, and the second linkage gear 33 is meshingly arranged with the second driving gear 218.

[0036] The first driving gear 215 drives the rotating shaft 31 and the second linkage gear 33 to rotate through the first linkage gear 32, and the second linkage gear 33 drives the second screw rod 217 to rotate through the second driving gear 218.

[0037] The contents not described in detail in the specification are all the prior art known by the person skilled in the art.

[0038] In operation, the driving motor 213 drives the first driving gear 215 and the first screw rod 214 to rotate, the first driving gear 215 drives the rotating shaft 31 and the second linkage gear 33 through the first linkage gear 32 to rotate, the second linkage gear 33 drives the second screw rod 217 to rotate through the second driving gear 218, the first screw rod 214 and the second screw rod 217 drive the first threaded sleeve 216 and the second threaded sleeve 219 to move towards each other, and synchronously drive the two triangular sliding plates 221 to move towards each other, the triangular sliding plates 221 push the first supporting rod 222 and the second supporting rod 224 to expand outwardly in an arc shape through the adjusting assembly 4, so that the auxiliary roller 223 and the driving roller 229 contact the inner wall of the power plant boiler water wall pipe.

[0039] Then, the walking motor 226 operates to drive the first bevel gear 227 to rotate, the first bevel gear 227 drives the second bevel gear 2210 to rotate, the second bevel gear 2210 drives the driving roller 229 to rotate, so that the device walks on the surface of the power plant boiler water wall pipe, and the detection probe 6 operates to detect the power plant boiler water wall.

[0040] It should be noted that, in the present document, the terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising", "containing" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0041] Although the embodiments of the present application have been shown and described, it should be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A power plant boiler water wall weld far-field eddy current testing device, comprising a main frame (1), a fixed seat (5) is fixedly installed at the left end of the main frame (1), and a detection probe (6) is fixedly installed inside the fixed seat (5), characterized in that: The inside of the main frame (1) is provided with a detection unit (2) for detecting the surface of the power plant boiler water wall pipe with different diameters, the detection unit (2) comprises: The driving unit (21) is arranged in the inside of the main frame (1) and is used for providing kinetic energy for the operation of the adapting unit (22); The adapting unit (22) is arranged outside the driving unit (21) and comprises a group of triangular slides (221) slidingly installed on the surface of the slide rod of the main frame (1), two first supporting rods (222) are movably installed below the triangular slide (221) through the adjusting assembly (4), one end of the first supporting rod (222) is fixedly installed with an auxiliary roller (223), and a second supporting rod (224) is movably installed above the triangular slide (221) through the adjusting assembly (4), one end of the second supporting rod (224) is fixedly installed with a roller frame (228), the inside of the roller frame (228) is rotatably installed with a driving roller (229), and the triangular slide (221) slides through the adjusting assembly (4) to realize the rotation of the first supporting rod (222) and the second supporting rod (224) outwardly expanding and inwardly contracting, and the surface detection of the power plant boiler water wall pipe with different diameters is realized.

2. A device for remote field eddy current testing of a weld of a water wall of a utility boiler as defined in claim 1, characterized in that: One end of the inner shaft of the driving roller (229) penetrates the roller frame (228) and is fixedly installed with a second bevel gear (2210), one side of the second supporting rod (224) is fixedly installed with a fixed frame (225), the inside of the fixed frame (225) is fixedly installed with a walking motor (226), the output end of the walking motor (226) penetrates the fixed frame (225) and is fixedly installed with a first bevel gear (227), and the first bevel gear (227) is meshingly installed with the second bevel gear (2210).

3. The device for detecting a weld of a water wall of a utility boiler according to claim 1, characterized in that: The adjusting assembly (4) comprises a telescopic pipe (41) rotatably installed on the side of the triangular slide (221), a telescopic rod (43) is slidingly installed in the inside of the telescopic pipe (41), one end of the telescopic rod (43) is rotatably connected with the first supporting rod (222) and the second supporting rod (224) respectively, and a spring (42) is fixedly installed in the inside of the telescopic pipe (41).

4. A device for the remote field eddy current testing of a weld in a water wall of a utility boiler as defined in claim 3, characterized in that: The side of the telescopic pipe (41) is provided with a limiting groove (44), the side of the telescopic rod (43) is fixedly installed with a limiting block (45), and the limiting block (45) is slidingly located in the inside of the limiting groove (44) for limiting the movement of the telescopic rod (43).

5. A device for detecting a weld of a water wall of a utility boiler by a far field eddy current method according to claim 1, characterized in that: The driving unit (21) includes left and right triangular plates (211, 212) fixedly installed on the sliding rod surface of the main frame (1), and first and second support rods (222, 224) rotatably connected to the ends of the left and right triangular plates (211, 212), respectively, and a driving motor (213) fixedly installed on the inner side of the right triangular plate (212), with the output end of the driving motor (213) penetrating through the right triangular plate (212) to fixedly install a first lead screw (214), and the surface of the first lead screw (214) fixedly installed with a first driving gear (215), and the surface of the first lead screw (214) threadedly installed with a first threaded sleeve (216), the outer side of the left triangular plate (211) rotatably installed with a second lead screw (217), and the surface of the second lead screw (217) fixedly installed with a second threaded sleeve (219), and the outer sides of the first and second threaded sleeves (216, 219) fixedly connected with a triangular slide plate (221), the surface of the second lead screw (217) threadedly installed with the second threaded sleeve (219), and the first driving gear (215) rotatably connected to the second driving gear (218) through a linkage assembly (3).

6. A device for the remote field eddy current testing of a weld in a water wall of a utility boiler as defined in claim 5, characterized in that: The linkage assembly (3) includes a rotating shaft (31) rotatably installed inside the left and right triangular plates (211, 212), and the right end of the rotating shaft (31) fixedly installed with a first linkage gear (32), and the left end of the first linkage gear (32) fixedly installed with a second linkage gear (33), and the first linkage gear (32) meshingly installed with the first driving gear (215), and the second linkage gear (33) meshingly installed with the second driving gear (218).

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