Ultrasonic nondestructive inspection equipment for welded pipe

Abstract

The invention discloses ultrasonic nondestructive inspection equipment for a welded pipe, and relates to the technical field of welded pipe detection, the ultrasonic nondestructive inspection equipment specifically comprises a support frame and a welded pipe fixing structure, the horizontal end of the support frame is connected with a coupling agent smearing structure through a translation structure I, and the horizontal end of the support frame is connected with a detection marking structure through a translation structure II; a welded pipe fixing structure is arranged below the supporting frame; the coupling agent smearing structure comprises a double-head hydraulic telescopic rod connected with the moving end of the first translation structure and a first visual sensor connected with the bottom of the double-head hydraulic telescopic rod. According to the ultrasonic nondestructive inspection equipment for the welded pipe, automatic smearing of a coupling agent can be achieved through the coupling agent smearing structure, the use convenience of the equipment is improved, the shape of a shaping belt can be matched with the welded pipes of various sizes, then the shape of a coupling agent spraying pipe can be matched with the welded pipes of various sizes, and the coupling agent spraying efficiency is improved; the operation of replacing a coupling agent spray pipe with a proper shape is omitted, and the use efficiency of the equipment is improved.

Description

Technical Field

[0001] The invention relates to the technical field of welded pipe detection, in particular to an ultrasonic nondestructive flaw detection device for welded pipes. Background Art

[0002] The welding quality of welded pipes is directly related to the quality and safety of engineering construction. Before using welded pipes, they need to be tested for flaws. At present, ultrasonic non-destructive testing can quickly detect internal defects of welded pipes. Its reliability, stability and high degree of automation are superior to other flaw detection methods, making ultrasonic non-destructive testing a common method for welded pipe testing.

[0003] In the related art, the steps for using ultrasonic flaw detection equipment are usually as follows: apply coupling agent on the surface of the welded pipe, make the probe contact the welded pipe to be tested at a suitable angle, and move the probe at a suitable speed to achieve non-destructive flaw detection of the welded pipe. However, since most of the current ultrasonic flaw detection equipment only has a detection function, it is necessary for the staff to observe the test results to determine the location of the flaws on the welded pipe, which is not intuitive and has high requirements for the staff; and there are many types of welded pipes. When applying the coupling agent, replacing the brush that is compatible with the welded pipe can improve the efficiency of applying the coupling agent, but it is more troublesome; based on this, the present application proposes an ultrasonic non-destructive flaw detection device for welded pipes. Summary of the invention

[0004] The present invention provides an ultrasonic nondestructive flaw detection device for welded pipes, which solves the problem that the existing ultrasonic flaw detection equipment mentioned in the above background technology cannot mark the location where the flaws appear and is not intuitive; replacing the brush adapted to the welded pipe can improve the efficiency of coupling agent application, but it is more troublesome.

[0005] The present invention provides the following technical solution: an ultrasonic nondestructive flaw detection device for a welded pipe, comprising a support frame and a welded pipe fixing structure, wherein the horizontal end of the support frame is connected to a coupling agent coating structure via a first translation structure, the horizontal end of the support frame is connected to a detection mark structure via a second translation structure, and a welded pipe fixing structure is arranged below the support frame;

[0006] The coupling agent coating structure includes a double-headed hydraulic telescopic rod connected to the moving end of the translation structure 1, a visual sensor 1 connected to the bottom of the double-headed hydraulic telescopic rod, a hydraulic telescopic rod 3 connected to the end of one output shaft of the double-headed hydraulic telescopic rod, a coupling agent storage box connected to the end of the output shaft of the hydraulic telescopic rod 3, a hydraulic telescopic rod 4 connected to the other output shaft end of the double-headed hydraulic telescopic rod, a servo motor 2 connected to the end of the output shaft of the hydraulic telescopic rod 4, a winding wheel and a shaping belt connected to the end of the output shaft of the servo motor 2, one end of the shaping belt is fixedly connected to the winding wheel, and the other end of the shaping belt is connected to the output shaft of the hydraulic telescopic rod 3 The end of the shaft is connected, the shaping belt is a hollow structure, the inner cavity of the shaping belt is filled with water, the inner wall of the shaping belt is provided with an electric heating wire, the top of the inner cavity of the shaping belt is evenly provided with a refrigerator, the end of the shaping belt close to the detection mark structure is provided with a coupling agent nozzle, the bottom of the coupling agent nozzle is evenly fixedly connected with a spray hole, the coupling agent nozzle is connected to the coupling agent storage box through a liquid pump, the bottom end of the hydraulic telescopic rod four close to the hydraulic telescopic rod three is provided with a clamping structure, the clamping structure includes a clamping roller connected to the hydraulic telescopic rod four through a moving structure, and the coupling agent nozzle is located between the clamping roller and the winding wheel;

[0007] The detection marking structure includes an ultrasonic probe, a wiper block, a marking pen and a visual sensor.

[0008] Preferably, the welding pipe fixing structure includes two groups of brackets, which include a hydraulic telescopic rod 1, a support plate connected to the end of the output shaft of the hydraulic telescopic rod 1, a rotating shaft movably connected to the top of the support plate, a hydraulic telescopic rod 2 evenly connected to one end of the rotating shaft, a clamping plate connected to the end of the output shaft of the hydraulic telescopic rod 2, and a servo motor 1 connected to the support plate, and the end of the output shaft of the servo motor 1 is connected to an end of the rotating shaft away from the clamping plate.

[0009] Preferably, a heat insulating pad is provided on the outer surface of the shaping belt, and a groove adapted to the refrigerator is provided on the side of the shaping belt away from the refrigerator.

[0010] Preferably, the distance between the coupling agent nozzle and the welding pipe is 2-3 mm.

[0011] Preferably, the detection marking structure also includes a driven block and a hydraulic telescopic rod five connected to the moving end of the translation structure two, an electric telescopic rod three connected to the driven block, a hydraulic telescopic rod six connected to the output shaft end of the electric telescopic rod three, and a hydraulic telescopic rod seven connected to the driven block; the output shaft end of the hydraulic telescopic rod five is connected to the ultrasonic probe, the output shaft end of the hydraulic telescopic rod six is ​​connected to the wiping block, the output shaft end of the hydraulic telescopic rod seven is connected to the marking pen, and the visual sensor two is connected to the bottom of the driven block.

[0012] Preferably, the hydraulic telescopic rod six is ​​located between the hydraulic telescopic rod seven and the hydraulic telescopic rod five; and the ultrasonic probe is located on a side of the wiping block close to the coupling agent coating structure.

[0013] Preferably, the clamping plates in the bracket are distributed in a circumference, and anti-slip pads are provided on the outer sides of the clamping plates.

[0014] Preferably, the movable structure includes an electric telescopic rod 1 connected to the bottom end of the hydraulic telescopic rod 4 and an electric telescopic rod 2 connected to the end of the output shaft of the electric telescopic rod 1, and the end of the output shaft of the electric telescopic rod 2 is connected to the end of the clamping roller away from the shaping belt.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The ultrasonic nondestructive flaw detection equipment for welded pipes can realize automatic application of coupling agent by using the coupling agent application structure, thereby improving the convenience of using the equipment. The shape of the shaping belt can be adapted to welded pipes of various sizes, thereby making the shape of the coupling agent nozzle adaptable to welded pipes of various sizes, thereby improving the coupling agent spraying efficiency and omitting the operation of replacing the coupling agent nozzle of a suitable shape, thereby improving the use efficiency and convenience of the equipment.

[0017] 2. The ultrasonic nondestructive flaw detection equipment for welded pipes can wipe off the coupling agent on the part to be marked by using a wiping block through the setting of the detection marking structure, which is convenient for marking. The welded pipe can be marked by using a marking pen, so that the staff can intuitively see the detection results of the ultrasonic nondestructive flaw detection equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front schematic diagram of the structure of the present invention;

[0019] Figure 2 The structure of the present invention Figure 1 Schematic diagram on the right;

[0020] Figure 3 It is a schematic diagram of the structural support of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure detection marker structure of the present invention;

[0022] Figure 5 It is a bottom view schematic diagram of the structure detection mark structure of the present invention;

[0023] Figure 6 This is a schematic diagram of the coating structure of the structural coupling agent of the present invention;

[0024] Figure 7 This is a bottom-up schematic diagram of the structure of the structural coupling agent coating structure of the present invention;

[0025] Figure 8It is a cross-sectional schematic diagram of the structural shaping belt of the present invention.

[0026] In the figure: 1, support frame; 2, hydraulic telescopic rod 1; 3, support plate; 4, rotating shaft; 5, servo motor 1; 6, winding wheel; 7, ball screw 1; 8, ball screw 2; 9, ball nut 2; 10, servo motor 3; 11, servo motor 4; 12, driven block; 13, ball screw 3; 14, ball nut 3; 15, ball nut 1; 16, hydraulic telescopic rod 4; 17, wiping block; 18, coupling agent storage box; 19, clamping plate; 20, hydraulic telescopic rod 2; 21, servo motor 5; 22, hydraulic telescopic rod 5; 23. Ultrasonic probe; 24. Hydraulic telescopic rod 6; 25. Hydraulic telescopic rod 7; 26. Marking pen; 27. Visual sensor 2; 28. Hydraulic telescopic rod 3; 29. ​​Liquid pump; 30. Liquid inlet pipe; 31. Liquid outlet pipe; 32. Molding belt; 33. Refrigerator; 34. Coupling agent nozzle; 35. Heating wire; 36. Visual sensor 1; 37. Double-head hydraulic telescopic rod; 38. Bottom plate; 39. Servo motor 2; 40. Electric telescopic rod 1; 41. Electric telescopic rod 2; 42. Clamping roller; 43. Electric telescopic rod 3. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The present invention provides an embodiment: please refer to Figure 1-8 , an ultrasonic nondestructive flaw detection equipment for welded pipes, comprising a support frame 1 and a welded pipe fixing structure, a welded pipe fixing structure is arranged below the support frame 1, the welded pipe fixing structure comprises two sets of brackets, the bracket comprises a hydraulic telescopic rod 2, a support plate 3 connected to the end of the output shaft of the hydraulic telescopic rod 2, a rotating shaft 4 movably connected to the top of the support plate 3, a hydraulic telescopic rod 20 evenly connected to one end of the rotating shaft 4, a clamping plate 19 connected to the end of the output shaft of the hydraulic telescopic rod 20, and a servo motor 5 connected to the support plate 3, the end of the output shaft of the servo motor 5 is connected to the end of the rotating shaft 4 away from the clamping plate 19, the clamping plates 19 in the bracket are distributed in a circle, and an anti-skid pad is arranged on the outer side of the clamping plate 19, and the material of the anti-skid pad can be rubber. Through the setting of the welded pipe fixing structure, the extension and retraction of the hydraulic telescopic rod 2 can change the distance between the two support plates 3, and the extension and retraction of the hydraulic telescopic rod 20 can change the position of the clamping plate 19, so that the welded pipe fixing structure can adapt to welded pipes of various sizes, thereby improving the adaptability of the equipment.

[0029] The horizontal end of the support frame 1 is connected to a coupling agent coating structure through a translation structure 1. In some embodiments of the present application, the translation structure 1 includes a ball screw 28 movably connected to the horizontal end of the support frame 1, a ball nut 29 threadedly connected to the ball screw 28, and a servo motor 4 11 fixedly connected to the support frame 1, the end of the output shaft of the servo motor 4 11 is connected to the ball screw 28 through a reducer, and when the servo motor 4 11 drives the ball screw 28 to rotate, the ball nut 29 threadedly connected to the ball screw 28 can move in the direction where the ball screw 28 is located.

[0030] The coupling agent applying structure includes a double-headed hydraulic telescopic rod 37 connected to the moving end of the translation structure 1, the double-headed hydraulic telescopic rod 37 is fixedly connected to the ball nut 29, and the ball nut 29 drives the double-headed hydraulic telescopic rod 37 to move when it moves. The bottom of the double-headed hydraulic telescopic rod 37 is connected to a visual sensor 1 36, and one output shaft end of the double-headed hydraulic telescopic rod 37 is connected to a hydraulic telescopic rod 3 28, and the output shaft end of the hydraulic telescopic rod 3 28 is connected to a bottom plate 38. A coupling agent storage box 18 is arranged on the top of the bottom plate 38, and a liquid pump 29 is arranged on the outer surface of the coupling agent storage box 18. The liquid inlet end of the liquid pump 29 is connected to a liquid inlet pipe 30, and the other end of the liquid inlet pipe 30 extends to the bottom end of the inner cavity of the coupling agent storage box 18, and the liquid outlet end of the liquid pump 29 is connected to a liquid outlet pipe 31. When the liquid pump 29 is working, the coupling agent stored in the coupling agent storage box 18 can be pumped into the inner cavity of the liquid outlet pipe 31.

[0031] The other output shaft end of the double-head hydraulic telescopic rod 37 is connected to the hydraulic telescopic rod 416, the output shaft end of the hydraulic telescopic rod 416 is connected to the servo motor 239, the output shaft end of the servo motor 239 is connected to the winding wheel 6 through a reducer, the outer wall of the winding wheel 6 is connected to one end of the shaping belt 32, and the other end of the shaping belt 32 is fixedly connected to the bottom plate 38. When the servo motor 239 rotates, the winding wheel 6 connected thereto can be driven to rotate, and the rotation of the winding wheel 6 can change the length of the shaping belt 32 between the winding wheel 6 and the bottom plate 38. The shaping belt 32 can be adapted to welded pipes of various outer diameters.

[0032] The shaping belt 32 is a hollow structure, and an insulating pad is provided on the outer surface of the shaping belt 32. The inner cavity of the shaping belt 32 is filled with water. The inner wall of the shaping belt 32 is provided with a heating wire 35. The top of the inner cavity of the shaping belt 32 is evenly provided with a refrigerator 33. A groove adapted to the refrigerator 33 is provided on the side of the shaping belt 32 away from the refrigerator 33. The refrigerator 33 can be a semiconductor refrigerator. The hot end of the refrigerator 33 is exposed to the air. When the refrigerator 33 is working, it can cool the water until the water freezes. After the water freezes, the shape of the shaping belt 32 can remain fixed.

[0033] A coupling agent nozzle 34 is provided at one end of the shaping belt 32 close to the detection mark structure, and a spray hole is evenly and fixedly connected to the bottom of the coupling agent nozzle 34. The coupling agent nozzle 34 is connected to the coupling agent storage box 18 through a liquid pump 29, and the end of the liquid outlet pipe 31 away from the liquid pump 29 is connected to the coupling agent nozzle 34. The coupling agent can be pumped into the inner cavity of the coupling agent nozzle 34 under the action of the liquid pump 29, and the coupling agent in the coupling agent nozzle 34 can be sprayed out through the spray hole. When the device is in use, the coupling agent sprayed from the spray hole can be sprayed onto the surface of the welded pipe. The distance between the coupling agent nozzle 34 and the welded pipe is 2-3mm, and the coupling agent sprayed by the coupling agent coating structure is 2-3mm.

[0034] A clamping structure is provided at the bottom end of the hydraulic telescopic rod 4 16 near the hydraulic telescopic rod 3 28. The clamping structure includes a clamping roller 42 connected to the hydraulic telescopic rod 4 through a moving structure. The coupling agent spray pipe 34 is located between the clamping roller 42 and the winding wheel 6. The moving structure includes an electric telescopic rod 1 40 connected to the bottom end of the hydraulic telescopic rod 4 16 and an electric telescopic rod 2 41 connected to the end of the output shaft of the electric telescopic rod 1 40. The end of the output shaft of the electric telescopic rod 2 41 is connected to the end of the clamping roller 42 away from the shaping belt 32. Through the setting of the clamping structure, the moving structure can drive the clamping roller 42 to move. Under the action of the electric telescopic rod 1 40, the clamping roller 42 can squeeze the coupling agent spray pipe 34 and cut off the coupling agent spray pipe 34 to prevent the coupling agent from entering the coupling agent spray pipe 34 wound on the winding wheel 6. Under the action of the electric telescopic rod 2 41, the distance between the clamping roller 42 and the coupling agent spray pipe 34 can be changed, which is convenient for the winding and unwinding of the coupling agent spray pipe 34.

[0035] When the device is in use, the coupling agent spray pipe can be used to automatically apply the coupling agent to the surface of the weld pipe, and the visual sensor 36 can be used to detect the outer diameter of the weld pipe. The distance and telescopic length between the hydraulic telescopic rod 3 28 and the hydraulic telescopic rod 4 16 are adjusted according to the outer diameter of the weld pipe, and finally the shaping belt 32 is made as shown in FIG. Figure 1 and Figure 2 After the state shown, the clamping structure works to cut off the coupling agent spray pipe 34, and the refrigerator 33 works until the water in the shaping belt 32 freezes and the shape of the shaping belt 32 is fixed. The liquid pump 29 and the translation structure 1 work simultaneously, and the translation structure 1 drives the coupling agent coating structure to move in the direction where the welding pipe is located. The liquid pump 29 works and the liquid pump 29 pumps the coupling agent into the inner cavity of the coupling agent spray pipe 34. The coupling agent in the coupling agent spray pipe 34 is sprayed onto the welding pipe through the spray hole, so that the coupling agent is automatically coated on the welding pipe. In this process, the servo motor 15 drives the rotating shaft 4 to rotate, and the rotating shaft 4 drives the welding pipe to rotate through the clamping plate 19, so that the outer surface of the welding pipe can be evenly coated with the coupling agent.

[0036] The horizontal end of the support frame 1 is connected with a detection mark structure through a translation structure 2. In some embodiments of the present application, the translation structure 2 includes a ball screw 17 connected to the horizontal end of the support frame 1, a ball nut 15 threadedly connected to the ball screw 17, a servo motor 3 10 connected to the support frame 1, a ball screw 3 13 movably connected to the ball nut 15, a servo motor 5 21 connected to the ball nut 15, a ball nut 3 14 threadedly connected to the ball screw 3 13, and a driven block 12 fixedly connected to the ball nut 3 14. The end of the output shaft of the servo motor 3 10 is connected to the end of the ball screw 17 through a reducer, and the end of the output shaft of the servo motor 5 21 is connected to the end of the ball screw 3 13 through a reducer.

[0037] By setting the translation structure 2, under the action of the servo motor 3 10, the driven block 12 can move in the direction of the ball screw 7; under the action of the servo motor 5 21, the driven block 12 can move in the telescopic direction of the double-headed hydraulic telescopic rod 37.

[0038] The detection marking structure includes an ultrasonic probe 23, a wiping block 17, a marking pen 26 and a visual sensor 27. The detection marking structure also includes a longitudinal movement structure connected to the translation structure 2, a driven block 12 and a hydraulic telescopic rod 5 22 connected to the moving end of the longitudinal movement structure, an electric telescopic rod 3 43 connected to the driven block 12, a hydraulic telescopic rod 6 24 connected to the end of the output shaft of the electric telescopic rod 3 43, and a hydraulic telescopic rod 7 25 connected to the driven block 12; the end of the output shaft of the hydraulic telescopic rod 5 22 is connected to the ultrasonic probe 23, the end of the output shaft of the hydraulic telescopic rod 6 24 is connected to the wiping block 17, the end of the output shaft of the hydraulic telescopic rod 7 25 is connected to the marking pen 26, and the hydraulic telescopic rod 6 24 is located between the hydraulic telescopic rod 7 25 and the hydraulic telescopic rod 5 22; the ultrasonic probe 23 is located on the side of the wiping block 17 close to the coupling agent coating structure. The visual sensor 27 is connected to the bottom of the driven block 12. The wiping block 17 can wipe the coupling agent, and the marking pen 26 can mark the surface of the welded pipe. The types of the wiping block 17 and the marking pen 26 can be selected according to the needs, and will not be described here. Through the setting of the visual sensor 27, the visual sensor 27 can detect the position of the detection mark structure, so that the ultrasonic probe 23 is in a vertical state with the welded pipe, and detect the mark content.

[0039] By setting the detection mark structure, after the coupling agent is applied or during the coupling agent application process, the translation structure 2 drives the detection mark structure to move, and the ultrasonic probe 23 of the ultrasonic non-destructive flaw detection equipment can perform ultrasonic non-destructive flaw detection on the welded pipe. The detection result is uploaded to the ultrasonic flaw detector of the ultrasonic non-destructive flaw detection equipment. The ultrasonic flaw detector and the ultrasonic probe 23 are used in combination to obtain information on defects in the welded pipe. The specific principle is the existing technology and will not be repeated here.

[0040] The electrical components involved in this application are all prior art, and technicians in this field are familiar with their connection methods. Through these technicians, all the electrical components in this application are connected to their compatible power supplies through wires, and according to the actual situation, a suitable controller is selected to meet the control requirements. The specific connection and control sequence are described below. The electrical connection is completed in a sequential working order, and the detailed connection means are well known in the art. The following mainly introduces the working principle and process, and no further explanation of the electrical control is given.

[0041] In summary, when the ultrasonic nondestructive flaw detection device for welded pipes is used, the coupling agent nozzle can be used to automatically apply the coupling agent to the surface of the welded pipe, and the visual sensor 36 is used to detect the outer diameter of the welded pipe. The distance and telescopic length between the hydraulic telescopic rod 3 28 and the hydraulic telescopic rod 4 16 are adjusted according to the outer diameter of the welded pipe, so that the shaping belt 32 is finally formed. Figure 1 and Figure 2 After the state shown, the clamping structure works to cut off the coupling agent spray pipe 34, and the refrigerator 33 works until the water in the shaping belt 32 freezes and the shape of the shaping belt 32 is fixed. The liquid pump 29 and the translation structure 1 work simultaneously, and the translation structure 1 drives the coupling agent coating structure to move in the direction where the welding pipe is located. The liquid pump 29 works and the liquid pump 29 pumps the coupling agent into the inner cavity of the coupling agent spray pipe 34. The coupling agent in the coupling agent spray pipe 34 is sprayed onto the welding pipe through the spray hole, so that the coupling agent is automatically coated on the welding pipe. In this process, the servo motor 15 drives the rotating shaft 4 to rotate, and the rotating shaft 4 drives the welding pipe to rotate through the clamping plate 19, so that the outer surface of the welding pipe can be evenly coated with the coupling agent. After the coupling agent is applied or during the coupling agent application process, the translation structure 2 drives the detection marking structure to move, and the ultrasonic probe 23 of the ultrasonic non-destructive flaw detection equipment can perform ultrasonic non-destructive flaw detection on the welded pipe. The detection result is uploaded to the ultrasonic flaw detector of the ultrasonic non-destructive flaw detection equipment. The ultrasonic flaw detector and the ultrasonic probe 23 are used in combination to obtain information on defects in the welded pipe. If it is necessary to mark the damaged part of the welded pipe, the coupling agent of the part to be marked is wiped off with the wiping block 17, and then the marking pen 26 is used to mark the welded pipe.

[0042] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art and will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. An ultrasonic nondestructive flaw detection device for a welded pipe, comprising a support frame (1) and a welded pipe fixing structure, characterized in that: The horizontal end of the support frame (1) is connected to a coupling agent coating structure via a first translation structure, the horizontal end of the support frame (1) is connected to a detection mark structure via a second translation structure, and a welding pipe fixing structure is provided below the support frame (1); The coupling agent applying structure comprises a double-headed hydraulic telescopic rod (37) connected to a moving end of a translation structure, a visual sensor (36) connected to the bottom of the double-headed hydraulic telescopic rod (37), a hydraulic telescopic rod (28) connected to an output shaft end of the double-headed hydraulic telescopic rod (37), a coupling agent storage box (18) connected to an output shaft end of the hydraulic telescopic rod (28), a hydraulic telescopic rod (16) connected to another output shaft end of the double-headed hydraulic telescopic rod (37), a servo motor (39) connected to an output shaft end of the hydraulic telescopic rod (16), a reel (6) connected to an output shaft end of the servo motor (39), and a shaping belt (32), wherein one end of the shaping belt (32) is fixedly connected to the reel (6), and the other end of the shaping belt (32) is connected to an output shaft of the hydraulic telescopic rod (28). The shaping belt (32) is connected to the end of the shaft, the shaping belt (32) is a hollow structure, the inner cavity of the shaping belt (32) is filled with water, the inner wall of the shaping belt (32) is provided with an electric heating wire (35), the top of the inner cavity of the shaping belt (32) is evenly provided with a refrigerator (33), the shaping belt (32) is provided with a coupling agent nozzle (34) at one end close to the detection mark structure, the bottom of the coupling agent nozzle (34) is evenly fixedly connected with a spray hole, the coupling agent nozzle (34) is connected to the coupling agent storage box (18) through a liquid pump (29), the bottom end of the hydraulic telescopic rod four (16) close to the hydraulic telescopic rod three (28) is provided with a clamping structure, the clamping structure includes a clamping roller (42) connected to the hydraulic telescopic rod four through a movable structure, and the coupling agent nozzle (34) is located between the clamping roller (42) and the winding wheel (6); The detection marking structure comprises an ultrasonic probe (23), a wiping block (17), a marking pen (26) and a second visual sensor (27).

2. The ultrasonic nondestructive testing device for welded pipes according to claim 1, characterized in that: The welding pipe fixing structure comprises two groups of brackets, wherein the brackets comprise a hydraulic telescopic rod (2), a support plate (3) connected to the end of the output shaft of the hydraulic telescopic rod (2), a rotating shaft (4) movably connected to the top of the support plate (3), a hydraulic telescopic rod (20) evenly connected to one end of the rotating shaft (4), a clamping plate (19) connected to the end of the output shaft of the hydraulic telescopic rod (20), and a servo motor (5) connected to the support plate (3), wherein the end of the output shaft of the servo motor (5) is connected to one end of the rotating shaft (4) away from the clamping plate (19).

3. The ultrasonic nondestructive testing equipment for welded pipes according to claim 1, characterized in that: The outer surface of the shaping belt (32) is provided with a heat insulation pad, and the side of the shaping belt (32) away from the refrigerator (33) is provided with a groove adapted to the refrigerator (33).

4. The ultrasonic nondestructive testing equipment for welded pipes according to claim 1, characterized in that: The distance between the coupling agent nozzle (34) and the welding pipe is 2-3 mm.

5. The ultrasonic nondestructive testing equipment for welded pipes according to claim 1, characterized in that: The detection marking structure also includes a driven block (12) and a hydraulic telescopic rod (5) (22) connected to the second moving end of the translation structure, an electric telescopic rod (3) (43) connected to the driven block (12), a hydraulic telescopic rod (6) (24) connected to the output shaft end of the electric telescopic rod (3) (43), and a hydraulic telescopic rod (7) (25) connected to the driven block (12); the output shaft end of the hydraulic telescopic rod (5) (22) is connected to the ultrasonic probe (23), the output shaft end of the hydraulic telescopic rod (6) (24) is connected to the wiping block (17), the output shaft end of the hydraulic telescopic rod (7) (25) is connected to the marking pen (26), and the visual sensor (27) is connected to the bottom of the driven block (12).

6. The ultrasonic nondestructive testing device for welded pipes according to claim 5, characterized in that: The hydraulic telescopic rod six (24) is located between the hydraulic telescopic rod seven (25) and the hydraulic telescopic rod five (22); the ultrasonic probe (23) is located on a side of the wiping block (17) close to the coupling agent coating structure.

7. The ultrasonic nondestructive testing equipment for welded pipes according to claim 2, characterized in that: The clamping plates (19) in the bracket are distributed in a circumferential manner, and an anti-slip pad is provided on the outer side of the clamping plates (19).

8. The ultrasonic nondestructive testing equipment for welded pipes according to claim 1, characterized in that: The mobile structure comprises an electric telescopic rod 1 (40) connected to the bottom end of the hydraulic telescopic rod 4 (16) and an electric telescopic rod 2 (41) connected to the end of the output shaft of the electric telescopic rod 1 (40), and the end of the output shaft of the electric telescopic rod 2 (41) is connected to an end of the clamping roller (42) away from the shaping belt (32).

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