Nondestructive testing method for through-flow boiler based on pulse reflection method ultrasonic testing

Abstract

The invention relates to the technical field of boiler nondestructive testing, in particular to a tubular boiler nondestructive testing method based on pulse reflection method ultrasonic testing, which comprises a tubular boiler body, the tubular boiler body is cylindrical, and the arc outer side wall of the tubular boiler body is provided with a sliding plate part used for sliding along the arc outer side wall of the tubular boiler body; the sliding plate part comprises a sliding plate, a vertical transmission wheel, a wheel and a cylindrical adhesive tape; winding parts used for fixing the height of the sliding plate part and driving the sliding plate part to slide are arranged at the left end and the right end of the sliding plate part, and a probe adjusting part used for being attached to and detecting the arc outer side wall of the through-flow boiler body is fixedly inserted into the middle of the sliding plate part. Through the vertical transmission wheels in mutual transmission, the wheels in synchronous steering and the winding part for driving the flaw detection head to slide, automatic nondestructive detection of the whole arc outer wall of the through-flow boiler with various circular radius sizes is realized, and high efficiency and convenience are realized.

Description

Technical Field

[0001] The invention relates to the technical field of boiler nondestructive testing, and in particular to a nondestructive testing method for a through-flow boiler based on pulse reflection ultrasonic testing. Background Art

[0002] The through-flow boiler is a highly efficient and energy-saving boiler. Its characteristics are that the combustion chamber and the flue gas duct are integrated. The flue gas flows inside the boiler, so that the heat is fully utilized and the thermal efficiency is improved. Thus, low-nitrogen combustion is achieved and the pollution to the environment is reduced. In order to accommodate multiple units of combustion chambers or flue gas ducts, the size of its external furnace wall is generally larger. The probe core of the ultrasonic flaw detector is a piezoelectric chip. When an electrical signal is applied to the chip, mechanical vibration is generated, thereby emitting ultrasonic waves. When the emitted ultrasonic wave encounters a defect or interface, it will be reflected. The probe receives the reflected ultrasonic wave and converts it into an electrical signal for analysis and processing.

[0003] The patent with application number CN220231606U discloses an ultrasonic flaw detector, including a flaw detector housing, a winding groove is provided on the flaw detector housing, a data line is sleeved on the winding groove, a flaw detector probe is fixedly installed at the end of the data line, a protective mechanism is sleeved on the flaw detector housing, the protective mechanism includes a mechanism base, a limiting protrusion, an inlet and outlet notch, a protective shell and a limiting hole, the protective shell is sleeved on the flaw detector housing, a mechanism base is fixedly installed at the bottom of the protective shell, an inlet and outlet notch is provided on the front surface of the protective shell, limiting holes are provided on both sides of the protective shell, a limiting protrusion is fixedly installed on the inner wall of the protective shell, and a limiting mechanism is fixedly installed in the flaw detector housing. After the protective shell is pushed downward, the winding groove will be exposed, and after the winding groove is exposed, the user can wrap the data line in the winding groove to prevent the data line from being tangled and entangled.

[0004] It can indeed prevent data cables from getting tangled when the probe is detecting an object, but because the furnace wall of a through-flow boiler is generally large and has a circular arc surface on the outside, workers need to constantly move the probe up and down and left and right manually when detecting the entire furnace wall, which takes too much time and the shape of the probe is not easy to fit the circular arc surface. Summary of the invention

[0005] In order to overcome the defects in the prior art, the purpose of the present invention is to provide a non-destructive testing method for a through-flow boiler based on pulse reflection ultrasonic testing to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The nondestructive testing method for a through-flow boiler based on pulse reflection ultrasonic testing includes the following steps:

[0008] S1. First, during the inspection, workers use heightening tools to insert the silicone rope from the upper end of the through-flow boiler body;

[0009] S2, then, lift the slide plate to the highest position of the through-flow boiler body, start the two second servo motors to drive the winding rollers to wind up the silicone rope and tighten the slide plate to cover the outside of the through-flow boiler body and keep them at the same horizontal height;

[0010] S3. Then, apply coupling agent to the probe where the probe adjustment part contacts the outer wall of the through-flow boiler body, insert the probe adjustment part into the middle of the slide until the probe adjustment part contacts the outer wall of the through-flow boiler body directly, and then tighten the two hand-tightened long screws to fix the front and rear positions of the probe adjustment part;

[0011] S4. After the slide plate and the probe adjustment part are fixed, the second servo motor at one end is started to shorten the silicone rope, and the second servo motor at the other end is started to lengthen the silicone rope at the same speed, so that the slide plate slides along the silicone rope around the outer wall of the through-flow boiler body at a uniform speed, thereby driving the probe adjustment part to slide on the outer wall of the through-flow boiler body. While sliding, the probe adjustment part works and records the ultrasonic detection information of a circle of the through-flow boiler body at the horizontal height;

[0012] S5. After the probe adjustment part detects the first circle near the top, the two second servo motors are powered off and paused, and the first servo motor is started and driven through the vertical transmission wheel, the horizontal transmission wheel and the cylindrical rubber strip, thereby synchronously driving the four wheels to adjust to an acute angle of travel;

[0013] S6. When the wheel is tilted downward, the two second servo motors are started, and the second servo motor on the side of the wheel tilted upward reels the silicone rope, and the second servo motor on the side of the wheel tilted downward lets the silicone rope grow, and the speed at which one end of the silicone rope grows longer is greater than the speed at which the other end of the silicone rope is reeled in, so that the silicone rope wrapped around the outer side of the through-flow boiler body grows longer and becomes loose, and the slide part drives the silicone rope to gradually move spirally downward;

[0014] S7, when the slide plate part drops to a certain height, the two second servo motors are started in reverse according to step S6 to control the silicone rope to shorten and tighten, and return to the state where the whole is at the same horizontal plane height;

[0015] S8, start the first servo motor to drive the four wheels back to the horizontal position, and then repeat the operation according to step S4 to obtain the ultrasonic detection data of the outer wall of the through-flow boiler body at this layer height, and then repeat the operations of steps S4-S8 until the ultrasonic detection data of the entire outer wall of the through-flow boiler body is completed;

[0016] S9, all motors are powered off, the entire slide plate, the winding part and the probe adjustment part are taken out from the upper end of the through-flow boiler body, and the quality and damage of the through-flow boiler body are determined by processing all ultrasonic detection data;

[0017] The above steps use the cooperation of the slide plate part, the winding part and the probe adjustment part to complete the non-destructive testing of the through-flow boiler body;

[0018] The through-flow boiler body is cylindrical and is provided with a slide plate portion sliding along the outer wall of the circular arc. The left and right ends of the slide plate are provided with a winding portion for fixing the height and driving the slide plate to slide. The middle part of the slide plate is plugged and fixed with a probe adjustment portion for fitting the outer wall of the circular arc of the through-flow boiler body.

[0019] The slide plate portion comprises a slide plate, four vertical transmission wheels rotatably connected to the rear side wall of the slide plate, a rotating seat coaxially connected to the vertical transmission wheels, a wheel rotatably connected to the rotating seat for generating rolling friction with the outer side wall of the circular arc of the throughflow boiler body, a cylindrical rubber strip bypassing all the vertical transmission wheels, and a first servo motor for driving one of the vertical transmission wheels; the vertical transmission wheel rotates to drive the cylindrical rubber strip to move around, thereby driving a plurality of wheels to adjust their directions synchronously, thereby guiding the slide plate portion to adjust its travel direction;

[0020] The winding part includes a pair of upper and lower extension rods arranged at one side end of the slide plate, a winding roller rotatably connected between the outer ends of the pair of extension rods, a second servo motor for driving the winding roller, and a same silicone rope with two ends wound around the pair of winding rollers; the silicone rope is also wound around the outer side of the arc of the through-flow boiler body and presses the slide plate part against the outer side of the arc of the through-flow boiler body; a flaw detection head is embedded in the middle of the slide plate.

[0021] As a further improvement of the present technical solution, the slide plate includes a middle section with a square opening for slidingly fitting the probe adjustment portion, and two symmetrically arranged inclined sections integrally formed at the left and right ends of the middle section and forming an obtuse angle with the middle section.

[0022] As a further improvement of the technical solution, two round-headed protrusions are integrally formed on the rear side wall of the middle section of the skateboard, and a transverse transmission wheel is horizontally rotatably connected to the round-headed protrusion. The vertical transmission wheel and the transverse transmission wheel are both cylindrical in shape and annular grooves for winding the cylindrical rubber strips are evenly opened along the arc surfaces of both. All the transverse transmission wheels are connected to all the vertical transmission wheels through the cylindrical rubber strips, and the two planes where the two inclined sections at both ends of the skateboard are located are tangent to the transverse transmission wheel.

[0023] As a further improvement of the present technical solution, a carrier block is fixedly installed on the rear side of the skateboard by bolts, and the carrier block is fixedly installed on the rear side wall of the inclined section of the skateboard by bolts. The first servo motor is fixedly installed on the carrier block by bolts, and the output shaft of the first servo motor is coaxially connected to one of the swivel seats.

[0024] As a further improvement of the technical solution, the slide plate is symmetrically threaded with two long hand screws at the top of the square opening. The long hand screws are vertically arranged. When the long hand screws are turned downward, their lower ends can be located in the square opening.

[0025] As a further improvement of the technical solution, the distance between the outer end of the extension rod and the through-flow boiler body is greater than the distance between the two ends of the slide plate and the through-flow boiler body.

[0026] As a further improvement of the technical solution, the second servo motor is fixedly installed on the lower end of the lower extension rod by bolts, and the output shaft of the second servo motor is vertically upward and coaxially connected to the corresponding winding roller; a rope-winding rod for passing the silicone rope is integrally formed on the upper extension rod; the silicone rope is made of silicone material with low toughness and high friction.

[0027] As a further improvement of the present technical solution, the probe adjustment part includes a mouth-shaped shell slidably inserted in the middle of the slide plate, the mouth-shaped shell includes a concave shell at the bottom and a mouth-shaped shell cover arranged on the top of the concave shell, the probe adjustment part also includes a concave frame slidably sleeved on the outside of the mouth-shaped shell, two hinge shafts fixedly arranged at the left and right ends of the front end of the concave frame, two upper round bar protrusions fixedly arranged at the front end of the mouth-shaped shell cover, two lower round bar protrusions fixedly arranged at the front end of the lower part of the concave shell, a metal bonding sheet fixedly arranged at the rear end of the concave frame, a silicone block fixedly arranged at the rear side of the metal bonding sheet, and a flaw detection head fixedly arranged at the rear side of the silicone block and slidably inserted in the mouth-shaped shell; the two ends of the metal bonding sheet parallel to each other are hinged to the hinge shaft on the same side, the two lower round bar protrusions and the two upper round bar protrusions are arranged correspondingly up and down, and the upper and lower ends of the middle part of the metal bonding sheet are hinged to the front ends of the corresponding two lower round bar protrusions and the front ends of the two upper round bar protrusions;

[0028] Force blocks are welded and fixed on the left and right outer side walls of the concave shell. The force blocks are in the shape of long rectangular blocks. When the concave frame slides, the force blocks do not contact the concave frame.

[0029] As a further improvement of the present technical solution, a push-pull rod is vertically slidably inserted in the left middle section of the slide plate, and the push-pull rod passes through the concave frame and the slide plate in sequence from front to back; the left and right sides of the concave frame are provided with square openings for accommodating the force block, and the push-pull rod includes two left limit rings clamped at the front and rear ends of the left and right sides of the concave frame, a left limit block at the front end for preventing the push-pull rod from detaching from the force block on the left, and a hexagonal nut at the rear end for twisting and rotating the push-pull rod; a thread is provided on the outer side wall of the push-pull rod between the front left limit ring and the left limit block, and the push-pull rod is threadedly connected to the force block at the thread.

[0030] As a further improvement of the present technical solution, a sliding rod is slidably inserted through the middle section of the slide plate, the concave frame and the force-bearing block on the right from front to back, and the sliding rod includes two right limiting circular rings clamped at the front and rear of the rear ends on the left and right sides of the concave frame, a right limiting circular block at the front end for preventing the sliding rod from detaching from the force-bearing block on the right, and a flat nut for limiting at the rear end; when the concave frame slides forward, the middle part of the metal bonding sheet can bend backward.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. The nondestructive testing method for flow-through boilers based on pulse reflection ultrasonic testing can be adapted to be installed on the arc outer wall of the flow-through boiler body with different radii by means of two second servo motors that are set to reel in the silicone rope at the same time. The rotating seat, the wheels rotatably connected to the rotating seat, the vertical transmission wheel, the horizontal transmission wheel, the cylindrical rubber strip, and the first servo motor can be set to enable all wheels to change their angles at the same time and slide downward in coordination with the spiral of the reeling part, and then descend from the top to complete the testing of the arc outer wall of the entire flow-through boiler body. This method does not require manpower and is convenient and efficient.

[0033] 2. The nondestructive testing method for through-flow boilers based on pulse reflection ultrasonic testing, through the provision of a mouth shell, a concave frame slidably connected to the front end of the mouth shell, and a metal bonding sheet hinged at multiple locations, enables the metal bonding sheet to bend to fit the outer side walls of arcs of different sizes, thereby making ultrasonic testing more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the figures are only schematic, used to help understand the present invention, and are not specifically limited to the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to the teachings of the present invention.

[0035] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0036] Figure 2 It is a partial rear view structure schematic diagram of the present invention;

[0037] Figure 3 It is a partial front view structural schematic diagram of the present invention;

[0038] Figure 4 It is a schematic diagram of a local explosion structure in the present invention;

[0039] Figure 5 It is a structural schematic diagram of the probe adjustment part in the present invention;

[0040] Figure 6 It is a schematic diagram of the explosion structure of the probe adjustment part in the present invention;

[0041] Figure 7 It is a schematic diagram of the structure of the push-pull rod in the present invention;

[0042] Figure 8 It is a structural schematic diagram of the sliding rod in the present invention;

[0043] The meaning of each number in the figure is:

[0044] 1. Through-flow boiler body;

[0045] 2. Slide plate; 20. Slide plate; 201. Square mouth; 21. Vertical transmission wheel; 22. Rotating seat; 220. Wheel; 23. Round head convex block; 24. Horizontal transmission wheel; 25. Cylindrical rubber strip; 26. Carrier block; 260. First servo motor; 27. Hand-tightening long screw;

[0046] 3. Reeling section; 30. Extension rod; 31. Reeling roller; 310. Second servo motor; 32. Silicone rope; 33. Rope-pulling rod;

[0047] 4. Probe adjustment part; 40. Mouth shell; 401. Concave shell; 4010. Force block; 4011. Lower round bar convex block; 402. Mouth shell cover; 4020. Upper round bar convex block; 41. Concave frame; 410. Hinge shaft; 42. Push-pull rod; 420. Left limit ring; 421. Left limit block; 422. Thread; 423. Hexagon socket nut; 43. Sliding rod; 430. Right limit ring; 431. Right limit block; 432. Flat nut; 44. Metal bonding sheet; 45. Silicone block; 46. NDT head. DETAILED DESCRIPTION

[0048] The details of the present invention can be more clearly understood by combining the accompanying drawings with the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only used for the purpose of explaining the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be regarded as falling within the scope of the present invention. The terms "installation" and "connection" should be understood in a broad sense, which can be directly connected or indirectly connected through an intermediate medium.

[0049] The terms "central axis", "vertical", "horizontal", "front", "back", "up", "down", "left", "right", "top", "bottom", "inside", "outside" and the like used herein to indicate positions or positional relationships are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, in the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0050] See also Figure 1-Figure 8 As shown, the present invention provides a nondestructive testing method for a through-flow boiler based on a pulse reflection method ultrasonic testing, comprising the following steps:

[0051] S1. First, during the inspection, the worker uses a heightening tool to insert the silicone rope 32 from the upper end of the through-flow boiler body 1;

[0052] S2, then, lift the slide plate 20 to the highest position of the through-flow boiler body 1, start the two second servo motors 310 to drive the winding roller 31 to wind up the silicone rope 32, tighten the slide plate 20 to cover the outside of the through-flow boiler body 1, and keep them at the same horizontal height;

[0053] S3. Subsequently, a coupling agent is applied to the probe where the probe adjusting part 4 contacts the outer wall of the through-flow boiler body 1, and the probe adjusting part 4 is inserted into the middle of the slide plate 20 until the probe adjusting part 4 directly contacts the outer wall of the through-flow boiler body 1, and then two hand-tightened long screws 27 are tightened to fix the front and rear positions of the probe adjusting part 4;

[0054] S4, after fixing the slide plate 2 and the probe adjustment part 4, start the second servo motor 310 at one end to shorten the silicone rope 32, and start the second servo motor 310 at the other end to lengthen the silicone rope 32 at the same speed, so that the slide plate 2 slides along the silicone rope 32 around the outer wall of the through-flow boiler body 1 at a uniform speed, thereby driving the probe adjustment part 4 to slide on the outer wall of the through-flow boiler body 1. While sliding, the probe adjustment part 4 works and records the ultrasonic detection information of a circle of the through-flow boiler body 1 at the horizontal height;

[0055] S5. After the probe adjustment part 4 detects the first circle near the top, the two second servo motors 310 are powered off and paused, and the first servo motor 260 is started and driven through the vertical transmission wheel 21, the horizontal transmission wheel 24 and the cylindrical rubber strip 25, thereby synchronously driving the four wheels 220 to adjust to an acute angle of travel;

[0056] S6. When the wheel 220 is tilted downward, the two second servo motors 310 are started, and the second servo motor 310 on the tilted upward side of the wheel 220 reels the silicone rope 32, and the second servo motor 310 on the tilted downward side of the wheel 220 extends the silicone rope 32, and the speed of extending one end of the silicone rope 32 is greater than the speed of reeling in the other end, so that the silicone rope 32 on the outer side of the through-flow boiler body 1 is extended and loosened, and the slide plate 2 drives the silicone rope 32 to gradually move spirally downward;

[0057] S7, when the slide plate 2 drops to a certain height, the two second servo motors 310 are reversely started according to step S6 to control the silicone rope 32 to shorten and tighten, and return to the state where the whole is at the same horizontal plane height;

[0058] S8, start the first servo motor 260 to drive the four wheels 220 back to the horizontal position, and then repeat the operation according to step S4 to obtain the ultrasonic detection data of the outer wall of the through-flow boiler body 1 at this layer height, and then repeat the operation of steps S4-S8 until the ultrasonic detection data of the entire outer wall of the through-flow boiler body 1 is completed;

[0059] S9, all motors are powered off, the entire slide plate 2, the winding part 3 and the probe adjustment part 4 are taken out from the upper end of the through-flow boiler body 1, and the quality and damage of the through-flow boiler body 1 are determined by processing all ultrasonic detection data;

[0060] In the above steps, the cooperation of the slide plate part 2 , the winding part 3 and the probe adjustment part 4 is used to complete the non-destructive testing of the through-flow boiler body 1 .

[0061] Specifically, the through-flow boiler body 1 is cylindrical and is provided with a slide plate 2 on the outside thereof which slides along the outer wall of the circular arc, and both left and right ends of the slide plate 2 are provided with a winding portion 3 which can fix its height and drive it to slide, and a probe adjustment portion 4 which can fit the outer wall of the circular arc of the through-flow boiler body 1 is inserted and fixed in the middle of the slide plate 2;

[0062] The slide plate portion 2 comprises a slide plate 20, four vertical transmission wheels 21 rotatably connected to the rear side wall of the slide plate 20, a rotating seat 22 coaxially connected to the vertical transmission wheels 21, a wheel 220 rotatably connected to the rotating seat 22 and capable of generating rolling friction with the arc outer side wall of the throughflow boiler body 1, a cylindrical rubber strip 25 bypassing all the vertical transmission wheels 21, and a first servo motor 260 capable of driving one of the vertical transmission wheels 21; the rotation of the vertical transmission wheel 21 drives the cylindrical rubber strip 25 to move around, thereby driving the multiple wheels 220 to adjust their directions synchronously, thereby guiding the slide plate portion 2 to adjust its travel direction;

[0063] The winding portion 3 includes a pair of upper and lower extension rods 30 arranged at one side end of the slide plate portion 2, a winding roller 31 rotatably connected between the outer ends of the pair of extension rods 30, a second servo motor 310 capable of driving the winding roller 31, and the same silicone rope 32 with both ends wound around the pair of winding rollers 31; the silicone rope 32 is also wound around the outer side of the arc of the through-flow boiler body 1, and presses the slide plate portion 2 against the outer side of the arc of the through-flow boiler body 1 to fix the slide plate portion 2; a flaw detection head 46 is embedded in the middle of the slide plate 20.

[0064] Furthermore, the slide plate 20 includes a middle section with a square opening 201 capable of slidably receiving the probe adjustment portion 4, and two symmetrically arranged inclined sections integrally formed at the left and right ends of the middle section and forming an obtuse angle with the middle section, so as to better fit the arc surface.

[0065] Preferably, two round-headed protrusions 23 symmetrically formed in an upper and lower direction are integrally formed on the rear side wall of the middle section of the skateboard 20, and a transverse transmission wheel 24 is horizontally rotatably connected to the round-headed protrusions 23. The vertical transmission wheel 21 and the transverse transmission wheel 24 are both cylindrical in shape and annular grooves capable of winding cylindrical rubber strips 25 are evenly opened along the arc surfaces of both. All the transverse transmission wheels 24 are transmission-connected with all the vertical transmission wheels 21 through the cylindrical rubber strips 25, and the two planes where the two inclined sections at both ends of the skateboard 20 are located are tangent to the transverse transmission wheel 24, so that the cylindrical rubber strips 25 can be well wound.

[0066] Furthermore, a carrier block 26 is fixedly installed on the rear side of the skateboard 20 by bolts, and the carrier block 26 is fixedly installed on the rear side wall of the inclined section of the skateboard 20 by bolts. The first servo motor 260 is fixedly installed on the carrier block 26 by bolts, and the output shaft of the first servo motor 260 is coaxially connected to one of the swivel seats 22, thereby driving the four wheels 220 to change direction.

[0067] Specifically, two hand-tightened long screws 27 are symmetrically threadedly inserted at the top of the slide plate 20 at the square opening 201. The hand-tightened long screws 27 are vertically arranged. When the hand-tightened long screws 27 are screwed downward, the lower end thereof can be located in the square opening 201, so that it can be screwed downward and against the probe adjustment part 4, so that the probe adjustment part 4 maintains good contact with the through-flow boiler body 1.

[0068] Secondly, the distance between the outer end of the extension rod 30 and the through-flow boiler body 1 is greater than the distance between the two ends of the slide plate 20 and the through-flow boiler body 1, thereby reserving sufficient space for winding the silicone rope 32 so that the wound part of the silicone rope 32 does not contact the through-flow boiler body 1 or the cylindrical rubber strip 25.

[0069] Specifically, the second servo motor 310 is fixedly installed on the lower end of the lower extension rod 30 by bolts, and the output shaft of the second servo motor 310 is vertically upward and coaxially connected to the corresponding winding roller 31, so as to control the retraction and release of the silicone rope 32; a rope-pulling rod 33 capable of passing the silicone rope 32 is integrally formed on the upper extension rod 30, so as to ensure that the silicone rope 32 is difficult to get accidentally entangled and the tension of the silicone rope 32 on the skateboard 20 is stable; the silicone rope 32 is made of silicone material with low toughness and high friction, so as to fix the position of the skateboard 20 by tension.

[0070] Specifically, the probe adjustment part 4 includes a mouth-shaped shell 40 that is slidably inserted into the middle part of the slide plate 20, and the mouth-shaped shell 40 includes a concave shell 401 at the bottom and a mouth-shaped shell cover 402 that is covered on the top of the concave shell 401. The probe adjustment part 4 also includes a concave frame 41 that is slidably sleeved on the outside of the mouth-shaped shell 40, two hinge shafts 410 fixedly arranged at the left and right ends of the front end of the concave frame 41, two upper round bar protrusions 4020 fixedly arranged at the front end of the mouth-shaped shell cover 402, two lower round bar protrusions 4011 fixedly arranged at the front end of the lower part of the concave shell 401, and a The metal bonding sheet 44 at the rear end of the concave frame 41, the silicone block 45 fixedly arranged on the rear side of the metal bonding sheet 44, and the flaw detection head 46 fixedly arranged on the rear side of the silicone block 45 and slidably inserted in the mouth shell 40; the two parallel ends of the metal bonding sheet 44 are hinged to the hinge shaft 410 on the same side, the two lower round bar protrusions 4011 and the two upper round bar protrusions 4020 are arranged correspondingly up and down, and the upper and lower ends of the middle part of the metal bonding sheet 44 are hinged to the front ends of the corresponding two lower round bar protrusions 4011 and the front ends of the two upper round bar protrusions 4020;

[0071] Force blocks 4010 are welded and fixed on the left and right outer walls of the concave shell 401. The force blocks 4010 are in the shape of long rectangular blocks. When the concave frame 41 slides, the force blocks 4010 do not contact the concave frame 41, so that the concave frame 41 can smoothly slide on the outside of the mouth shell 40.

[0072] Preferably, a push-pull rod 42 is vertically slidably inserted in the left middle section of the skateboard 20, and the push-pull rod 42 passes through the concave frame 41 and the skateboard 20 in sequence from front to back; square openings that can accommodate the force block 4010 are opened on the left and right sides of the concave frame 41, and the push-pull rod 42 includes two left limit rings 420 clamped at the front and rear of the left and right sides of the concave frame 41, a left limit block 421 at the front end that can prevent the push-pull rod 42 from detaching from the force block 4010 on the left, and an inner hexagonal nut 423 at the rear end that can twist and rotate the push-pull rod 42; a thread 422 is provided on the outer side wall of the push-pull rod 42 between the front left limit ring 420 and the left limit block 421, and the push-pull rod 42 is threadedly connected to the force block 4010 at the thread 422; thereby, when the inner hexagonal nut 423 is twisted, the push-pull rod 42 can drive the concave frame 41 to slide back and forth.

[0073] Preferably, a sliding rod 43 is slidably inserted through the middle section of the slide plate 20, the concave frame 41 and the right-hand force block 4010 from front to back, and the sliding rod 43 includes two right limiting rings 430 clamped at the front and rear of the left and right sides of the concave frame 41, a right limiting block 431 at the front end that can prevent the sliding rod 43 from detaching from the right-hand force block 4010, and a flat nut 432 at the rear end that can limit the position; when the concave frame 41 slides forward, the middle part of the metal bonding sheet 44 can bend backward to fit the arc outer wall of the through-flow boiler body 1.

[0074] In addition, it should be noted that the first servo motor 260, the second servo motor 310, the flaw detection head 46 and the matching controller involved in the present invention are all universal standard parts or parts known to technical personnel in this field, and their structures and principles are all known to technical personnel in this field through technical manuals or through conventional experimental methods. In the idle space of this device, all the above-mentioned electrical components, which refer to power elements, electrical components, and compatible controllers and power supplies, are connected through wires. The specific connection means should refer to the working principle of the present invention. The electrical connection is completed between each electrical component in a sequential working order, and the detailed connection means are all well-known technologies in the field.

[0075] Finally, it should be noted that the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A non-destructive testing method for a flow-through boiler based on pulse reflection ultrasonic testing, comprising a flow-through boiler body (1), characterized in that: The following steps are involved: S1. First, insert the silicone rope (32) from the upper end of the through-flow boiler body (1); S2, then, lift the slide plate (20) to the highest position of the through-flow boiler body (1), start the two second servo motors (310) to drive the winding roller (31) to wind up the silicone rope (32) and tighten the slide plate (20) to cover the outside of the through-flow boiler body (1) and keep them at the same horizontal height; S3. Subsequently, a coupling agent is applied to the probe where the probe adjusting portion (4) contacts the outer wall of the through-flow boiler body (1), and the probe adjusting portion (4) is inserted into the middle of the slide plate (20) until the probe adjusting portion (4) directly contacts the outer wall of the through-flow boiler body (1), and then two hand-tightened long screws (27) are tightened to fix the front and rear positions of the probe adjusting portion (4); S4, after fixing the slide plate (2) and the probe adjustment part (4), start the second servo motor (310) at one end to shorten the silicone rope (32), and start the second servo motor (310) at the other end to lengthen the silicone rope (32) at the same speed, so that the slide plate (2) slides along the silicone rope (32) around the outer wall of the through-flow boiler body (1) at a uniform speed, thereby driving the probe adjustment part (4) to slide on the outer wall of the through-flow boiler body (1), and while sliding, the probe adjustment part (4) works and records the ultrasonic detection information of a circle of the through-flow boiler body (1) at the horizontal height; S5, when the probe adjustment part (4) has finished detecting the first circle near the top, the two second servo motors (310) are powered off and paused, and the first servo motor (260) is started and driven through the vertical transmission wheel (21), the horizontal transmission wheel (24) and the cylindrical rubber strip (25), thereby synchronously driving the four wheels (220) to adjust to an acute angle of travel; S6. When the wheel (220) is tilted downward, the two second servo motors (310) are started, and the second servo motor (310) on the side of the wheel (220) tilted upward reels the silicone rope (32), and the second servo motor (310) on the side of the wheel (220) tilted downward lengthens the silicone rope (32), and the speed at which one end of the silicone rope (32) is lengthened is greater than the speed at which the other end of the silicone rope (32) is reeled in, so that the silicone rope (32) sleeved on the outside of the through-flow boiler body (1) lengthens and becomes loose, and the slide plate (2) drives the silicone rope (32) to gradually move spirally downward; S7, when the slide plate (2) has dropped to a certain height, the two second servo motors (310) are started in reverse according to step S6 to control the silicone rope (32) to shorten and tighten, and return to a state where the whole is at the same horizontal plane height; S8, starting the first servo motor (260) to drive the four wheels (220) back to the horizontal position, and then repeating the operation according to step S4 to obtain ultrasonic detection data of the outer wall of the through-flow boiler body (1) at this layer height, and then repeating the operations of steps S4-S8 until the ultrasonic detection data of the entire outer wall of the through-flow boiler body (1) is completed; S9, all motors are powered off, the entire slide plate portion (2), the winding portion (3) and the probe adjustment portion (4) are removed from the upper end of the through-flow boiler body (1), and the quality and damage of the through-flow boiler body (1) are determined by processing all ultrasonic detection data; In the above steps, the slide plate part (2), the winding part (3) and the probe adjustment part (4) cooperate to complete the non-destructive testing of the through-flow boiler body (1); The through-flow boiler body (1) is cylindrical and is provided with a slide plate (2) on its outside for sliding along its arc outer wall, and both left and right ends of the slide plate (2) are provided with a reeling portion (3) for fixing its height and driving it to slide, and a probe adjustment portion (4) for fitting the arc outer wall of the through-flow boiler body (1) is inserted and fixed in the middle of the slide plate (2); The slide plate portion (2) comprises a slide plate (20), four vertical transmission wheels (21) rotatably connected to the rear side wall of the slide plate (20), a rotating seat (22) coaxially connected to the vertical transmission wheel (21), a wheel (220) rotatably connected to the rotating seat (22) for generating rolling friction with the arc outer side wall of the through-flow boiler body (1), a cylindrical rubber strip (25) bypassing all the vertical transmission wheels (21), and a first servo motor (260) for driving one of the vertical transmission wheels (21); the vertical transmission wheel (21) rotates to drive the cylindrical rubber strip (25) to move in a circular motion, thereby driving the plurality of wheels (220) to adjust their directions synchronously, thereby guiding the slide plate portion (2) to adjust its travel direction; The winding portion (3) comprises a pair of upper and lower extension rods (30) arranged at one side end of the slide plate portion (2), a winding roller (31) rotatably connected between the outer ends of the pair of extension rods (30), a second servo motor (310) for driving the winding roller (31), and a same silicone rope (32) with both ends wound around the pair of winding rollers (31); the silicone rope (32) is also wound around the outer side of the circular arc of the flow-through boiler body (1) and presses the slide plate portion (2) against the outer side of the circular arc of the flow-through boiler body (1); a flaw detection head (46) is embedded and installed in the middle of the slide plate (20).

2. The nondestructive testing method for through-flow boilers based on pulse reflection ultrasonic testing according to claim 1 is characterized in that: The slide plate (20) comprises a middle section having a square opening (201) for slidably sleeved on the probe adjustment portion (4), and two symmetrically arranged inclined sections integrally formed at left and right ends of the middle section and forming an obtuse angle with the middle section.

3. The nondestructive testing method for through-flow boilers based on pulse reflection ultrasonic testing according to claim 1 is characterized in that: Two round-headed protrusions (23) are integrally formed on the rear side wall of the middle section of the slide plate (20) and are symmetrical in both directions. A transverse transmission wheel (24) is horizontally rotatably connected to the round-headed protrusion (23). Both the vertical transmission wheel (21) and the transverse transmission wheel (24) are cylindrical in shape and annular grooves for winding the cylindrical rubber strip (25) are evenly formed along the arc surfaces of both. All the transverse transmission wheels (24) are transmission-connected with all the vertical transmission wheels (21) through the cylindrical rubber strip (25), and the two planes where the two inclined sections at the two ends of the slide plate (20) are located are tangent to the transverse transmission wheel (24).

4. The nondestructive testing method for through-flow boilers based on pulse reflection ultrasonic testing according to claim 2 is characterized in that: A carrier block (26) is fixedly mounted on the rear side of the slide plate (20) by bolts, and the carrier block (26) is fixedly mounted on the rear side wall of the inclined section of the slide plate (20) by bolts. The first servo motor (260) is fixedly mounted on the carrier block (26) by bolts, and the output shaft of the first servo motor (260) is coaxially connected to one of the swivel seats (22).

5. The nondestructive testing method for through-flow boilers based on pulse reflection ultrasonic testing according to claim 2 is characterized in that: The slide plate (20) has two long hand screws (27) symmetrically threadedly inserted at the top of the square opening (201). The long hand screws (27) are vertically arranged. When the long hand screws (27) are screwed downward, their lower ends can be located in the square opening (201).

6. The nondestructive testing method for through-flow boilers based on pulse reflection ultrasonic testing according to claim 1 is characterized in that: The distance between the outer end of the extension rod (30) and the through-flow boiler body (1) is greater than the distance between the two ends of the slide plate (20) and the through-flow boiler body (1).

7. The nondestructive testing method for through-flow boilers based on pulse reflection ultrasonic testing according to claim 1 is characterized in that: The second servo motor (310) is fixedly installed on the lower end of the lower extension rod (30) by bolts, and the output shaft of the second servo motor (310) is vertically upward and coaxially connected to the corresponding winding roller (31); a rope-pulling rod (33) for passing the silicone rope (32) is integrally formed on the upper extension rod (30); the silicone rope (32) is made of silicone material with low toughness and high friction.

8. The nondestructive testing method for through-flow boilers based on pulse reflection ultrasonic testing according to claim 1 is characterized in that: The probe adjusting part (4) comprises a mouth-shaped shell (40) slidably inserted in the middle part of the slide plate (20), the mouth-shaped shell (40) comprises a concave shell (401) at the bottom and a mouth-shaped shell cover (402) arranged on the top of the concave shell (401), the probe adjusting part (4) also comprises a concave frame (41) slidably sleeved on the outside of the mouth-shaped shell (40), two hinge shafts (410) fixedly arranged at the left and right ends of the front end of the concave frame (41), two upper round bar protrusions (4020) fixedly arranged at the front end of the mouth-shaped shell cover (402), two lower round bar protrusions (4011) fixedly arranged at the front end of the lower part of the concave shell (401), and a plurality of hinge shafts (410) fixedly arranged at the left and right ends of the front end of the concave frame (41). A metal bonding sheet (44) at the rear end of the concave frame (41), a silicone block (45) fixedly arranged on the rear side of the metal bonding sheet (44), and a flaw detection head (46) fixedly arranged on the rear side of the silicone block (45) and slidably inserted into the mouth shell (40); both ends of the metal bonding sheet (44) parallel to each other are hinged to the hinge shaft (410) on the same side, the two lower round bar protrusions (4011) and the two upper round bar protrusions (4020) are arranged correspondingly up and down, and the upper and lower ends of the middle part of the metal bonding sheet (44) are hinged to the front ends of the corresponding two lower round bar protrusions (4011) and the front ends of the two upper round bar protrusions (4020); Force blocks (4010) are welded and fixed on the left and right outer side walls of the concave shell (401), and the force blocks (4010) are in the shape of long rectangular blocks. When the concave frame (41) slides, the force blocks (4010) do not contact the concave frame (41).

9. The nondestructive testing method for through-flow boilers based on pulse reflection ultrasonic testing according to claim 8 is characterized in that: A push-pull rod (42) is vertically slidably inserted in the left middle section of the slide plate (20), and the push-pull rod (42) passes through the concave frame (41) and the slide plate (20) in sequence from front to back; the left and right sides of the concave frame (41) are both provided with square openings for accommodating the force-bearing block (4010), and the push-pull rod (42) includes two left limit rings (420) clamped at the front and rear ends of the left and right sides of the concave frame (41), and a front end for preventing the force-bearing block (4010) from sliding. The push-pull rod (42) is detached from the left limiting circular block (421) of the force-bearing block (4010) on the left and the hexagonal nut (423) at the rear end for twisting and rotating the push-pull rod (42); a thread (422) is provided on the outer wall of the push-pull rod (42) between the front left limiting circular ring (420) and the left limiting circular block (421), and the push-pull rod (42) is threadedly connected to the force-bearing block (4010) at the thread (422).

10. The nondestructive testing method for through-flow boilers based on pulse reflection ultrasonic testing according to claim 8, characterized in that: A sliding rod (43) is slidably inserted through the middle section of the slide plate (20), the concave frame (41) and the right-side force-bearing block (4010) in sequence from front to back, and the sliding rod (43) comprises two right limiting circular rings (430) clamped at the front and rear ends of the left and right sides of the concave frame (41), a right limiting circular block (431) at the front end for preventing the sliding rod (43) from escaping from the right-side force-bearing block (4010), and a flat nut (432) at the rear end for limiting; when the concave frame (41) slides forward, the middle part of the metal bonding sheet (44) can bend backward.

Images