Automatic ultrasonic tofd detection device for water conservancy pressure steel pipe girth weld

Abstract

The application provides an automatic ultrasonic TOFD detection device for a circumferential weld of a water conservancy pressure steel pipe, and relates to the technical field of water conservancy pressure pipe weld detection. The automatic ultrasonic TOFD detection device for the circumferential weld of the water conservancy pressure steel pipe comprises two pressure pipes and a weld body, the two pressure pipes are fixedly connected at the two sides of the weld body, chain connectors are sleeved on the outer sidewalls of the two pressure pipes at the two sides of the weld body, a hard connector is fixedly connected between the two chain connectors, two detection structures are arranged on the upper end face of the hard connector, and the detection structure is taken as an example. The detection structure comprises a shell, a cleaning structure is arranged on the lower inner wall of the shell, the cleaning structure comprises an arc-shaped shell, and a third hub is rotatably connected in the arc-shaped shell. The cleaning structure is arranged to clean the surfaces of the two pressure pipes, so that the detection is not affected.

Description

Technical Field

[0001] This invention relates to the field of weld inspection technology for hydraulic pressure steel pipes, specifically to an automated ultrasonic TOFD inspection device for circumferential welds of hydraulic pressure steel pipes. Background Technology

[0002] Hydraulic pressure pipes are key water conveyance structures in water conservancy projects used to transport high-pressure water. Essentially a closed, pressurized pipeline, their main function is to transport high-pressure water from a water source to the user's end via a pipeline network. Unlike ordinary water pipelines, hydraulic pressure pipes must withstand internal water pressure, thus requiring higher strength and sealing performance. The circumferential weld of a hydraulic pressure steel pipe is the annular butt weld between adjacent pipe sections, a critical connection point in the pressure pipe structure. The automated ultrasonic TOFD testing device for the circumferential weld of hydraulic pressure steel pipes is a specialized automated non-destructive testing device for the circumferential butt welds between adjacent pipe sections. Through ultrasonic TOFD technology, it achieves automated scanning, precise quantification, and intuitive imaging of internal weld defects. Its core function is to ensure the sealing and structural stability of the circumferential weld of the hydraulic pressure steel pipe, preventing leakage or failure due to defects and supporting the safe operation of water conservancy projects.

[0003] Existing automated ultrasonic TOFD testing devices for circumferential welds of hydraulic pressure steel pipes still have some problems. The probes of chain scanners are usually directly mounted on the mounting frame via wedges. When there are foreign objects on the pipe surface, such as dust and algae, the probe wedges are easily overturned by lateral forces, resulting in poor contact between the probe and the pipe surface, affecting the coupling effect of ultrasonic signals, or even preventing normal detection. Manual cleaning is required in advance, which slows down the detection efficiency. Therefore, those skilled in the art have provided an automated ultrasonic TOFD testing device for circumferential welds of hydraulic pressure steel pipes to solve the problems mentioned in the background art. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides an automated ultrasonic TOFD inspection device for circumferential welds of hydraulic pressure steel pipes. It solves the problem that when the probe of a chain scanner is directly mounted on the mounting frame via a wedge, the probe wedge is easily overturned by lateral forces when there are foreign objects on the pipe surface, such as dust and algae. This results in poor contact between the probe and the pipe surface, affecting the coupling effect of the ultrasonic signal, or even preventing normal detection. Manual cleaning is required beforehand, which slows down the detection efficiency.

[0005] (II) Technical Solution To achieve the above objectives, the present invention is implemented through the following technical solution: an automated ultrasonic TOFD testing device for circumferential welds of hydraulic pressure steel pipes, comprising two pressure pipes and a weld body, wherein the two pressure pipes are respectively fixedly connected to both sides of the weld body, and chain connectors are sleeved on the outer walls of the two pressure pipes on both sides of the weld body, and a rigid connector is fixedly connected between the two chain connectors at the upper part, wherein two detection structures are provided on the upper end face of the rigid connector; Taking one of the detection structures as an example, the detection structure includes a housing. A cleaning structure is provided near the front of the lower inner wall of the housing. The cleaning structure includes an arc-shaped shell. A third hub is rotatably connected inside the arc-shaped shell. A pivot at the center of one end face of the third hub passes through the inner side wall of the arc-shaped shell and extends to one side of the arc-shaped shell. A first gear is fixedly connected to the end of the pivot. A first umbrella wheel is provided near the upper side of one side of the first gear. A second umbrella wheel is provided near the lower rear end of the first umbrella wheel. A third umbrella wheel is fixedly connected to the rear end of the second umbrella wheel. A fourth umbrella wheel is provided near the rear side of one side of the third umbrella wheel. A shaft is fixedly connected to one end of the fourth umbrella wheel. A fifth umbrella wheel is fixedly connected to both sides of the outer side wall of the shaft. A sixth umbrella wheel is provided at the lower end of each of the two fifth umbrella wheels. The shafts at the lower ends of the two sixth umbrella wheels pass through the lower inner wall of the housing and extend to the lower end of the cleaning structure. A rotating disk is fixedly connected to the end of each of the two rotating disks. Multiple rigid cleaning rods and flexible cleaning bristles are fixedly connected to the lower ends of the rotating disks.

[0006] Preferably, the multiple rigid cleaning rods and multiple flexible cleaning bristles are respectively arranged crosswise at the center of the lower end face of the two rotating disks. After welding, the welding slag can be cleaned by the multiple rigid cleaning rods to prevent it from affecting the use of the ultrasonic detector.

[0007] Preferably, a second gear that meshes with the first gear is rotatably connected to one side wall of the upper arc-shaped shell of the first gear, and a third gear that meshes with the second gear is rotatably connected to one side wall of the upper arc-shaped shell of the second gear. The third gear is fixedly connected to the shaft of the first parasol wheel. A first bracket is sleeved on the outside of the shaft connecting the third gear and the first parasol wheel, and a second bracket is sleeved on the outside of the shaft connecting the second parasol wheel and the third parasol wheel. A third bracket is provided on both sides of the outer side wall of the shaft to facilitate the provision of support force for the drive component.

[0008] Preferably, a flexible sponge is fixedly connected to the lower end face of the rear end shell of the two rotating disks. The front end face of the flexible sponge is provided with guide surfaces on both sides. The two guide surfaces of the front end face of the flexible sponge guide larger impurities to both sides, while wetter impurities are wiped away by the two flexible sponges, which facilitates cleaning the surface of the two pressure pipes and prevents them from affecting the detection.

[0009] Preferably, a water tank and a battery are fixedly connected in a front-to-back arrangement inside the housing. An ultrasonic detector is fixedly connected to the lower end face of the lower housing of the battery. A coating pad is provided on the lower end face of the front housing of the ultrasonic detector. A solenoid valve is fixedly connected to the lower end face of the upper housing of the coating pad. The input end of the solenoid valve passes through the lower end face of the housing and the lower end face of the water tank, connecting to the lower inner wall of the water tank. A water inlet valve is fixedly connected to the center of the upper end face of the water tank. A top cover is provided on the upper end face of the housing. A turntable is provided at the center of the upper end face of the top cover. A second lead screw is fixedly connected to the lower end face of the turntable. An opening is provided at the center of the lower end face of the housing. The groove is formed by the second lead screw threaded through the upper end face of the top cover and the lower inner wall of the housing. During continuous rotation, the electromagnetic force generated by opening the solenoid valve when the coil is energized overcomes the spring force or the medium pressure, pushing the valve core upward and opening the channel between the water tank and the coating pad. The coupling agent inside the water tank leaks out and is adsorbed on the coating pad. The coating pad contacts the surface of the pressure pipe, and relative friction is generated between the coating pad and the surface of the pressure pipe, so that the adsorbed coupling agent is evenly coated on the surface of the pressure pipe. Then, it is detected by an ultrasonic detector. This is a commonly used technical solution in the existing ultrasonic detector detection, and will not be described in detail here.

[0010] Preferably, taking one of the chain connectors as an example, the chain connector includes a housing, and a base is provided at the lower part of the interior of the housing. A micro servo motor is fixedly connected to the center of the upper end face of the base, and a first lead screw is fixedly connected to the output end of the micro servo motor. The first lead screw is threadedly connected to the upper inner wall of the housing. Guide rods are fixedly connected to the four opposite corners of the upper end face of the base, and the four guide rods are slidably connected to the upper inner wall of the housing. Multiple connecting chains are provided on the outer side of the pressure pipes at the front and rear ends of the housing. One end of each connecting chain is fixedly connected to a support rod at the center of the front end face of the housing, and the other end of each connecting chain is fixedly connected to a clamping plate at the center of the rear end face of the housing. The clamping plates are respectively sleeved on the outer side of the support rods. A second hub is rotatably connected to one end face of each connecting chain near the center of the pressure pipe. The number of connecting chains is adjusted according to the diameter of the pressure pipe. Multiple connecting chains and support rods at both ends of the housing are inserted into multiple clamping plates. Multiple screws are then passed through the clamping plates and support rods. Anti-slip discs on one side are fixed to the screws, while anti-slip discs on the other side are threaded onto the screws, restricting the clamping plates and support rods. This allows the chain connector to be fitted onto the surface of the pressure pipe. Multiple pressure sensors on eight first hubs monitor the pressure between the eight first hubs and the two pressure pipes. These pressure sensors are arranged in a circle at the contact points between the eight first hubs and the two pressure pipes. Rubber pads are placed at the contact points between the pressure sensors and the pressure pipes to prevent direct contact damage. Based on the pressure feedback from the pressure sensors, a micro servo motor is activated. The micro servo motor drives the first lead screw to rotate, pushing the housing up and down, thereby adjusting the outer diameter of the ring formed by the housing and the multiple connecting chains, and adjusting the tension.

[0011] Preferably, each of the multiple clamping plates has a screw on one side, and the screws pass through one side wall of the clamping plates, one side wall of the support rods, and the inner side wall of the clamping plates to the other side of the clamping plates. Multiple anti-slip discs are provided on both sides of the clamping plates. On one side, the anti-slip discs are fixedly connected to the clamping plates, and on the other side, they are threaded to the other side of the clamping plates. First hubs are rotatably connected to the lower ends of both sides of the base. Sliding grooves are provided on the lower ends of the two outer shells that are close to each other. Before testing, two turntables can be rotated, driving two second lead screws to rotate. Because the grooves on the lower ends of the two shells are restricted by the third and fourth connecting plates, they can only move up and down, thus adjusting the pressure exerted by the third hub and the ultrasonic detector on the surface of the pressure pipe. This pressure can be achieved by setting a pressure sensor, which is a commonly used technical solution in existing pressure monitoring technology and will not be elaborated further here.

[0012] Preferably, the rigid connector includes a first connecting plate and a second connecting plate, which are arranged laterally. A first slot is formed at the center of the end face of each of the first and second connecting plates that are close to each other. A first insert plate is slidably connected inside each of the two first slots. A third connecting plate and a fourth connecting plate are respectively fixedly connected to the end face of each of the two first insert plates that are close to each other. A second slot is formed at the center of the end face of the third connecting plate that is close to the fourth connecting plate. A second insert plate is fixedly connected to the end face of the fourth connecting plate inside the second slot. Slides are formed on the inner walls of both the first and second slots. The upper ends of the two first insert plates and the two second insert plates are fixedly connected inside the three slides. The device is equipped with threaded posts. Each of the three threaded posts on the upper surfaces of the first, second, and third connecting plates has a wing nut threaded onto its outer side. Depending on the measurement position, rotating the two wing nuts in the opposite direction pushes the two chain connectors towards the center, moving the two first slots inside the two first insert plates. The distance between the two chain connectors is then adjusted. Rotating the two wing nuts again pulls the two first insert plates upwards, increasing friction with the two first slots for fixation. Rotating the wing nut at the center in the opposite direction inserts the second slot into the second insert plate or moves it to the sides. Rotating the wing nut again fixes it. This allows for easy adjustment of the distance between the two detection structures, facilitating adjustments based on actual usage and improving the flexibility of the equipment.

[0013] (III) Beneficial Effects This invention provides an automated ultrasonic TOFD testing device for circumferential welds of hydraulic pressure steel pipes. It offers the following advantages: 1. In this invention, two third hubs are rotatably connected to the outside of two pressure pipes. They rotate with the rotation of the housing. The third hubs drive the first gear to rotate, the first gear drives the second gear to rotate in the opposite direction, the second gear drives the third gear to rotate, the third gear drives the first parapet wheel to rotate, the first parapet wheel drives the second parapet wheel to rotate in the opposite direction, the second parapet wheel drives the third parapet wheel to rotate in the opposite direction, the third parapet wheel drives the fourth parapet wheel to rotate, and the fourth parapet wheel drives the shaft to rotate. Since the two fifth parapet wheels and the sixth parapet wheel are symmetrically arranged along the center position of the shaft, when the two fifth parapet wheels rotate with the shaft, they drive the two sixth parapet wheels to rotate in the opposite direction, thereby driving the two rotating disks to rotate. This drives multiple hard cleaning rods and multiple flexible cleaning bristles to clean the surface of the two pressure pipes. In addition, the two guide surfaces on the front end of the flexible sponge guide larger impurities to both sides, and the wetter impurities are wiped away by the two flexible sponges, which facilitates cleaning the surface of the two pressure pipes and prevents them from affecting the detection. Furthermore, after welding, the welding slag can also be cleaned by multiple hard cleaning rods to prevent it from affecting the use of the ultrasonic detector.

[0014] 2. In this invention, based on the measurement position, the two wing nuts are rotated in the opposite direction, and then the two chain connectors are pushed towards the center position, causing the two first slots to move into the interior of the two first insert plates. The distance between the two chain connectors is adjusted. Then, the two wing nuts are rotated to pull the two first insert plates upward, increasing the friction between them and the two first slots for fixation. Then, the wing nuts at the center position are rotated in the opposite direction to insert the second slot into the interior of the second insert plate or move it to the sides. The wing nuts are then rotated again for fixation. This allows for easy adjustment of the distance between the two detection structures, making it easier to adjust according to actual usage and improving the flexibility of equipment use.

[0015] 3. In this invention, multiple pressure sensors on eight first hubs monitor the pressure between the eight first hubs and two pressure pipes. The multiple pressure sensors are arranged in a circle at the contact points between the eight first hubs and the two pressure pipes. Rubber pads are placed at the contact points between the multiple pressure sensors and the pressure pipes to prevent direct contact damage to the pressure sensors. Based on the pressure feedback from the pressure sensors, a micro servo motor is started. The micro servo motor drives the first lead screw to rotate, pushing the outer shell to rise and fall, thereby adjusting the outer diameter of the ring formed by the outer shell and multiple connecting chains, and adjusting the tension. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention; Figure 2 This is a three-dimensional orthographic sectional view of the present invention; Figure 3 This is a three-dimensional side sectional view of the present invention; Figure 4 This is a three-dimensional exploded view of the chain connector of the present invention; Figure 5 This is a three-dimensional exploded view of the rigid connector and detection structure of the present invention; Figure 6 This is a perspective view of the cleaning structure of the present invention; Figure 7 This is a perspective view of the cleaning structure of the present invention from another angle; Figure 8 yes Figure 5 Enlarged diagram of point A in the middle.

[0017] Among them, 1. chain connector; 2. rigid connector; 3. detection structure; 4. pressure pipeline; 5. weld seam body; 101. Outer shell; 102. Connecting chain; 103. Base; 104. Miniature servo motor; 105. First lead screw; 106. Guide rod; 107. Support rod; 108. Clamping plate; 109. Screw; 110. Anti-slip disc; 111. First hub; 112. Second hub; 113. Slide groove; 201. First connecting plate; 202. Second connecting plate; 203. Third connecting plate; 204. Fourth connecting plate; 205. First insert plate; 206. Threaded post; 207. Second slot; 208. Second insert plate; 209. First slot; 210. Wing nut; 211. Slide rail; 301. Housing; 302. Top cover; 303. Turntable; 304. Second lead screw; 305. Battery; 306. Water tank; 307. Groove; 308. Ultrasonic detector; 309. Application pad; 310. Cleaning structure; 3101, Arc-shaped shell; 3102, Third hub; 3103, First gear; 3104, Second gear; 3105, Third gear; 3106, First support; 3107, First parasol wheel; 3108, Second parasol wheel; 3109, Second support; 31010, Third parasol wheel; 31011, Fourth parasol wheel; 31012, Third support; 31013, Fifth parasol wheel; 31014, Sixth parasol wheel; 31015, Rotating disc; 31016, Hard cleaning bar; 31017, Flexible cleaning bristles; 31018, Flexible sponge; 31019, Guide surface; 31020, Shaft. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1: like Figure 1-8 As shown, this embodiment of the invention provides an automated ultrasonic TOFD testing device for circumferential welds of hydraulic pressure steel pipes, including two pressure pipes 4 and a weld body 5. The two pressure pipes 4 are fixedly connected to both sides of the weld body 5. Chain connectors 1 are sleeved on the outer walls of the two pressure pipes 4 on both sides of the weld body 5. A rigid connector 2 is fixedly connected between the two chain connectors 1 at the upper part. Two detection structures 3 are provided on the upper end face of the rigid connector 2.

[0020] like Figure 1 , 2As shown in Figures 3, 5, 6, and 7, taking one of the detection structures, 3, as an example, the detection structure 3 includes a housing 301. A cleaning structure 310 is provided near the front of the lower inner wall of the housing 301. The cleaning structure 310 includes an arc-shaped shell 3101. A third hub 3102 is rotatably connected inside the arc-shaped shell 3101. A shaft at the center of one end face of the third hub 3102 passes through the inner wall of the arc-shaped shell 3101 and extends to one side of the arc-shaped shell 3101. A first gear 3103 is fixedly connected to the end of the first gear 3103. A first parasol wheel 3107 is provided near the upper side of one side of the first gear 3103. A second parasol wheel 3108 is provided near the lower rear end of the first parasol wheel 3107. A third umbrella wheel 31010 is fixedly connected. A fourth umbrella wheel 31011 is located on one rear side of the third umbrella wheel 31010. A shaft 31020 is fixedly connected to one end of the fourth umbrella wheel 31011. A fifth umbrella wheel 31013 is fixedly connected to both sides of the outer wall of the shaft 31020. A sixth umbrella wheel 31014 is provided at the lower end of each of the two fifth umbrella wheels 31013. The shafts at the lower ends of the two sixth umbrella wheels 31014 pass through the lower inner wall of the housing 301 and lead to the lower end of the cleaning structure 310. A rotating disk 31015 is fixedly connected to the end of each of the two rotating disks 31015. Multiple rigid cleaning rods 31016 and flexible cleaning bristles 31017 are fixedly connected to the lower ends of each of the two rotating disks 31015.

[0021] Multiple rigid cleaning rods 31016 and multiple flexible cleaning bristles 31017 are respectively arranged crosswise at the center of the lower end face of the two rotating disks 31015. After welding, the welding slag can be cleaned by the multiple rigid cleaning rods 31016 to prevent it from affecting the use of the ultrasonic detector 308.

[0022] A second gear 3104, meshing with the first gear 3103, is rotatably connected to one side wall of the arc-shaped shell 3101 at the upper end of the first gear 3103. A third gear 3105, meshing with the second gear 3104, is rotatably connected to one side wall of the arc-shaped shell 3101 at the upper end of the second gear 3104. The shaft between the third gear 3105 and the first parasol wheel 3107 is fixedly connected. A first bracket 3106 is sleeved on the outer side of the connecting shaft between the third gear 3105 and the first parasol wheel 3107. A second bracket 3109 is sleeved on the outer side of the connecting shaft between the second parasol wheel 3108 and the third parasol wheel 31010. A third bracket 31012 is provided on both sides of the outer side wall of the shaft 31020 to facilitate the provision of support force for the drive component.

[0023] Flexible sponges 31018 are fixedly connected to the lower end face of the rear housing 301 of the two rotating disks 31015. Guide surfaces 31019 are provided on both sides of the front end face of the flexible sponge 31018. The two guide surfaces 31019 on the front end face of the flexible sponge 31018 guide larger impurities to both sides, while wetter impurities are wiped away by the two flexible sponges 31018, which facilitates cleaning the surface of the two pressure pipes 4 and prevents it from affecting the detection.

[0024] Inside the housing 301, a water tank 306 and a battery 305 are fixedly connected in a front-to-back arrangement near the rear. An ultrasonic detector 308 is fixedly connected to the lower end face of the housing 301 below the battery 305. A coating pad 309 is provided on the lower end face of the housing 301 at the front end of the ultrasonic detector 308. A solenoid valve is fixedly connected to the lower end face of the housing 301 above the coating pad 309. The input end of the solenoid valve passes through the lower end face of the housing 301 and the lower end face of the water tank 306, leading to the lower inner wall of the water tank 306. A water inlet valve is fixedly connected to the center of the upper end face of the water tank 306. A top cover 302 is provided on the upper end face of the housing 301. A turntable 303 is provided at the center of the upper end face of the top cover 302. A second lead screw 304 is fixedly connected to the lower end face of the turntable 303. A hole is opened at the center of the lower end face of the housing 301. The device has a groove 307. The second lead screw 304 is threaded through the upper end face of the top cover 302 and the lower inner wall of the housing 301 to the inside of the groove 307. During continuous rotation, the electromagnetic valve is opened. When the coil is energized, the generated electromagnetic force overcomes the spring force or the medium pressure, pushing the valve core upward and opening the channel between the water tank 306 and the coating pad 309. The coupling agent inside the water tank 306 leaks out and is adsorbed on the coating pad 309. The coating pad 309 contacts the surface of the pressure pipe 4, and the coating pad 309 and the surface of the pressure pipe 4 generate relative friction, so that the adsorbed coupling agent is evenly coated on the surface of the pressure pipe 4. Then, it is detected by the ultrasonic detector 308. This is a commonly used technical solution in the existing ultrasonic detector 308 detection, and will not be described in detail here.

[0025] like Figure 1 , 2As shown in Figures 3 and 4, taking one of the chain connectors 1 as an example, the chain connector 1 includes a housing 101. A base 103 is located at the lower part of the interior of the housing 101. A micro servo motor 104 is fixedly connected to the center of the upper surface of the base 103. A first lead screw 105 is fixedly connected to the output end of the micro servo motor 104. The first lead screw 105 is threaded onto the upper inner wall of the housing 101. Guide rods 106 are fixedly connected to the four opposite corners of the upper surface of the base 103. The four guide rods 106 are slidably connected to the upper inner wall of the housing 101. Multiple connecting chains 102 are provided on the outer sides of the pressure pipes 4 at both ends of the housing 101. One end of each connecting chain 102 is fixedly connected to a support rod 107 at the center of the front face of the housing 101. The other end of each connecting chain 102 is fixedly connected to a clamping plate 108 at the center of the rear face of the housing 101. The clamping plates 108 are respectively fitted onto the outer sides of the support rods 107. A second hub 112 is rotatably connected to one end of each connecting chain 102 near the center of the pressure pipe 4. The number of connecting chains 102 is adjusted according to the diameter of the pressure pipe 4 to connect the multiple connecting chains. The support rods 107 at both ends of the chain 102 and the housing 101 are inserted into multiple clamping plates 108. Multiple screws 109 are then passed through the clamping plates 108 and the support rods 107. Because one side of the anti-slip disc 110 is fixed to the screws 109, and the other side of the anti-slip disc 110 is threaded onto the screws 109, the clamping plates 108 and support rods 107 are restricted. This allows the chain connector 1 to be fitted onto the surface of the pressure pipe 4. Multiple pressure sensors on the eight first hubs 111 monitor the pressure between the eight first hubs 111 and two… The pressure between the pressure pipes 4 is controlled by multiple pressure sensors arranged in a circle at the contact points between the eight first hubs 111 and the two pressure pipes 4. Rubber pads are placed at the contact points between the multiple pressure sensors and the pressure pipes 4 to prevent direct contact damage to the pressure sensors. Based on the pressure feedback from the pressure sensors, the micro servo motor 104 is started. The micro servo motor 104 drives the first lead screw 105 to rotate, pushing the outer shell 101 to rise and fall, thereby adjusting the outer diameter of the ring formed by the outer shell 101 and the multiple connecting chains 102, and adjusting the tension.

[0026] Each of the multiple clamping plates 108 has a screw 109 on one side. The screws 109 pass through one side wall of the multiple clamping plates 108, one side wall of the multiple support rods 107, and the inner side wall of the clamping plates 108, respectively, and extend to the other side of the clamping plates 108. Multiple anti-slip discs 110 are provided on both sides of the multiple clamping plates 108. On one side, the anti-slip discs 110 are fixedly connected to the multiple clamping plates 108, while on the other side, the anti-slip discs 110 are threadedly connected to the other side of the multiple clamping plates 108. The lower ends of both sides of the base 103 are rotatably connected to the first hubs 111. The two outer shells 101 are close to each other at their respective ends. Both are provided with a sliding groove 113 at the bottom. Before detection, two turntables 303 can be rotated. The two turntables 303 drive the two second lead screws 304 to rotate. Since the grooves 307 on the lower end face of the two housings 301 are restricted by the third connecting plate 203 and the fourth connecting plate 204, they can only move up and down. This allows the two housings 301 to move up and down, adjusting the pressure of the third hub 3102 and the ultrasonic detector 308 against the surface of the pressure pipe 4. This pressure can be achieved by setting a pressure sensor. It is a commonly used technical solution in existing pressure monitoring technology and will not be elaborated on here.

[0027] like Figure 1 , 2As shown in Figures 3, 5, and 8, the rigid connector 2 includes a first connecting plate 201 and a second connecting plate 202, which are arranged laterally. A first slot 209 is formed at the center of the end faces of the first connecting plate 201 and the second connecting plate 202 that are close to each other. A first insert plate 205 is slidably connected inside each of the two first slots 209. A third connecting plate 203 and a fourth connecting plate 204 are fixedly connected to the end faces of the two first insert plates 205 that are close to each other. A second slot 207 is formed at the center of the end face of the third connecting plate 203 that is close to the fourth connecting plate 204. A second insert plate 208 is fixedly connected to the end face of the fourth connecting plate 204 inside the second slot 207. Slides 211 are formed on the inner walls of the two first slots 209 and the inner wall of the second slot 207. The upper ends of the two first insert plates 205 and the second insert plates 208 inside the three slides 211 are... Each surface is fixedly connected with threaded posts 206. The outer sides of the three threaded posts 206 at the upper ends of the first connecting plate 201, the second connecting plate 202, and the third connecting plate 203 are all threaded with wing nuts 210. Depending on the measurement position, rotating the two wing nuts 210 in the opposite direction pushes the two chain connectors 1 towards the center, moving the two first slots 209 inside the two first insert plates 205. The distance between the two chain connectors 1 is then adjusted. Rotating the two wing nuts 210 again pulls the two first insert plates 205 upwards, increasing the friction between them and the two first slots 209 for fixation. Rotating the wing nut 210 at the center in the opposite direction inserts the second slot 207 into the second insert plate 208 or moves it to the sides. Rotating the wing nut 210 again fixes it. This allows for easy adjustment of the distance between the two detection structures 3, facilitating adjustments based on actual usage and improving the flexibility of equipment use.

[0028] Working principle: In use, the number of connecting chains 102 is adjusted according to the diameter of the pressure pipe 4. Multiple connecting chains 102 are inserted into multiple clamping plates 108 by inserting the support rods 107 at both ends of the outer casing 101 into the clamping plates 108. Multiple screws 109 are then passed through the clamping plates 108 and the support rods 107. Because one side of the anti-slip plate 110 is fixed to the screws 109, and the other side of the anti-slip plate 110 is threaded onto the screws 109, the clamping plates 108 and the support rods 107 are restricted, thus fitting the chain connector 1 onto the surface of the pressure pipe 4. This is achieved through multiple connections on the eight first hubs 111. Pressure sensors monitor the pressure between eight first hubs 111 and two pressure pipes 4. Multiple pressure sensors are arranged in a circle at the contact points between the eight first hubs 111 and the two pressure pipes 4. Rubber pads are placed at the contact points between the multiple pressure sensors and the pressure pipes 4 to prevent direct contact damage to the pressure sensors. Based on the pressure feedback from the pressure sensors, the micro servo motor 104 is started. The micro servo motor 104 drives the first lead screw 105 to rotate, pushing the outer shell 101 to rise and fall, thereby adjusting the outer diameter of the ring formed by the outer shell 101 and multiple connecting chains 102, and adjusting the tension.

[0029] When the two outer shells 101 move up and down, the setting of the slide groove 113 will not affect the connection between the first connecting plate 201 and the second connecting plate 202 and the base 103. According to the measurement position, rotate the two wing nuts 210 in the opposite direction, and then push the two chain connectors 1 towards the center position, so that the two first slots 209 move into the inside of the two first insert plates 205. The distance between the two chain connectors 1 is adjusted. Then rotate the two wing nuts 210 to pull the two first insert plates 205 upward, increasing the friction between them and the two first slots 209 for fixing. Then rotate the wing nuts 210 in the center position in the opposite direction to insert the second slot 207 into the inside of the second insert plate 208 or move it to the sides. Then rotate the wing nuts 210 to fix it. This makes it easy to adjust the distance between the two detection structures 3, which can be adjusted according to the actual use, improving the flexibility of the equipment.

[0030] In use, rotating the two chain connectors 1 or rigid connectors 2 causes the two third hubs 3102, which are rotatably connected to the outside of the two pressure pipes 4, to rotate along with the housing 301. The third hubs 3102 drive the first gear 3103 to rotate, which in turn drives the second gear 3104 to rotate in the opposite direction. The second gear 3104 drives the third gear 3105 to rotate, which in turn drives the first parachute wheel 3107 to rotate. The first parachute wheel 3107 drives the second parachute wheel 3108 to rotate in the opposite direction, which in turn drives the third parachute wheel 31010 to rotate in the opposite direction. The third parachute wheel 31010 drives the fourth parachute wheel 31011 to rotate, which in turn drives the shaft 31020 to rotate. This is because the two fifth parachute wheels 31013 and the sixth parachute wheel 3... 1014 is symmetrically arranged along the center position of shaft 31020. When the two fifth umbrella wheels 31013 rotate with shaft 31020, they drive the two sixth umbrella wheels 31014 to rotate in the opposite direction, thereby driving the two rotating disks 31015 to rotate. This drives multiple hard cleaning rods 31016 and multiple flexible cleaning bristles 31017 to clean the surface of the two pressure pipes 4. In addition, the two guide surfaces 31019 on the front end of the flexible sponge 31018 guide larger impurities to both sides, while wetter impurities are wiped away by the two flexible sponges 31018. This facilitates cleaning the surface of the two pressure pipes 4 and prevents it from affecting the detection. After welding, the welding slag can also be cleaned by the multiple hard cleaning rods 31016 to prevent it from affecting the use of the ultrasonic detector 308.

[0031] During continuous rotation, by opening the solenoid valve, when the coil is energized, the generated electromagnetic force overcomes the spring force or medium pressure, pushing the valve core upward, opening the channel between the water tank 306 and the coating pad 309. The coupling agent inside the water tank 306 leaks out and is adsorbed onto the coating pad 309. The coating pad 309 is made of porous or fibrous material, and its pore structure has a high specific surface area, which can effectively adsorb the coupling agent. The coating pad 309 contacts the surface of the pressure pipe 4, and relative friction is generated between the coating pad 309 and the surface of the pressure pipe 4, uniformly coating the adsorbed coupling agent onto the surface of the pressure pipe 4. Then, it is detected by the ultrasonic detector 308. The core of the ultrasonic detector 308 is a piezoelectric crystal. When a high-frequency electrical signal is applied, the piezoelectric crystal generates mechanical vibration and emits ultrasonic waves. TOFD is an advanced form of ultrasonic testing, employing a combination of a transmitter and a receiver probe. When the ultrasonic waves emitted by the transmitter probe encounter defects on the surface or inside the pipe, they generate diffraction waves. After the receiver probe captures the diffraction waves, it calculates the location and size of the defects using the time-of-flight difference. The probes are symmetrically placed on both sides of the weld seam 5 to ensure that the ultrasonic waves can cover the entire range of the weld seam 5 and the wall thickness of the pressure pipe 4. After these signals are received by the ultrasonic detector 308, they are converted into digital signals by the signal processing circuit and transmitted to the display terminal. This is a commonly used technical solution in existing ultrasonic detector 308 testing, and will not be elaborated further here.

[0032] Before testing, two turntables 303 can be rotated, which in turn drive two second lead screws 304 to rotate. Since the grooves 307 on the lower end faces of the two housings 301 are restricted by the third connecting plate 203 and the fourth connecting plate 204, they can only move up and down, thereby moving the two housings 301 up and down to adjust the pressure of the third hub 3102 and the ultrasonic detector 308 against the surface of the pressure pipe 4. This pressure can be achieved by setting a pressure sensor, which is a commonly used technical solution in existing pressure monitoring technology, and will not be elaborated on here. After the test is completed, the anti-slip plate 110 is removed, thereby separating the support rod 107 from the clamping plate 108 for easy disassembly.

[0033] The display terminal is an integrated controller. The integrated controller receives signals from various components through input ports. After processing, these signals serve as the basis for control decisions. The integrated controller then uses a control algorithm to process the input signals and generates control outputs according to predetermined rules. Based on the results of the control algorithm, the integrated controller sends signals to the actuators through the output ports. The integrated controller can also coordinate the work of various components, such as adjusting the working order and timing of multiple devices to ensure the efficient operation of the system. Furthermore, the integrated controller continuously monitors the operating status of each component and adjusts the control strategy in a timely manner based on feedback to cope with possible changes or anomalies. This solution is a commonly used technical method in the existing technology and will not be elaborated on further here.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automated ultrasonic TOFD testing device for circumferential welds of hydraulic pressure steel pipes, comprising two pressure pipes (4) and a weld seam body (5), wherein the two pressure pipes (4) are respectively fixedly connected to both sides of the weld seam body (5), characterized in that: Chain connectors (1) are fitted on the outer walls of the two pressure pipes (4) on both sides of the weld seam body (5). A rigid connector (2) is fixedly connected between the two chain connectors (1) at the upper part. Two detection structures (3) are provided on the upper end face of the rigid connector (2). Taking one of the detection structures (3) as an example, the detection structure (3) includes a housing (301), and a cleaning structure (310) is provided at the front of the lower inner wall of the housing (301). The cleaning structure (310) includes an arc-shaped shell (3101), and a third hub (3102) is rotatably connected inside the arc-shaped shell (3101). The rotating shaft at the center of one end face of the third hub (3102) passes through the inner side wall of the arc-shaped shell (3101) and extends to one side of the arc-shaped shell (3101), and a first gear (3103) is fixedly connected to the end. A first parasol wheel (3107) is provided at the upper side of one side of the first gear (3103), and a second parasol wheel (3108) is provided at the lower rear end of the first parasol wheel (3107). The rear end of the second parasol wheel (3108) is fixedly connected to the first gear (3107). A third umbrella wheel (31010) is fixedly connected. A fourth umbrella wheel (31011) is located on one rear side of the third umbrella wheel (31010). A shaft (31020) is fixedly connected to one end of the fourth umbrella wheel (31011). A fifth umbrella wheel (31013) is fixedly connected to both sides of the outer wall of the shaft (31020). A sixth umbrella wheel (31014) is provided at the lower end of each of the two fifth umbrella wheels (31013). The shafts of the lower ends of the two sixth umbrella wheels (31014) pass through the lower inner wall of the housing (301) and lead to the lower end of the cleaning structure (310). A rotating disk (31015) is fixedly connected to the end of each of the two rotating disks (31015). Multiple rigid cleaning rods (31016) and flexible cleaning bristles (31017) are fixedly connected to the lower ends of the two rotating disks (31015).

2. The automated ultrasonic TOFD testing device for circumferential welds of hydraulic pressure steel pipes according to claim 1, characterized in that: Multiple rigid cleaning rods (31016) and multiple flexible cleaning bristles (31017) are respectively arranged crosswise at the center of the lower end face of the two rotating disks (31015).

3. The automated ultrasonic TOFD testing device for circumferential welds of hydraulic pressure steel pipes according to claim 1, characterized in that: A second gear (3104) meshes with the first gear (3103) on one side wall of the upper arc-shaped shell (3101) of the first gear (3103). A third gear (3105) meshes with the second gear (3104) on one side wall of the upper arc-shaped shell (3101) of the second gear (3104). The shaft between the third gear (3105) and the first parasol wheel (3107) is fixedly connected. A first bracket (3106) is sleeved on the outside of the connecting shaft between the third gear (3105) and the first parasol wheel (3107). A second bracket (3109) is sleeved on the outside of the connecting shaft between the second parasol wheel (3108) and the third parasol wheel (31010). A third bracket (31012) is provided on both sides of the outer wall of the shaft (31020).

4. The automated ultrasonic TOFD testing device for circumferential welds of hydraulic pressure steel pipes according to claim 1, characterized in that: A flexible sponge (31018) is fixedly connected to the lower end face of the rear housing (301) of the two rotating disks (31015), and a guide surface (31019) is provided on both sides of the front end face of the flexible sponge (31018).

5. The automated ultrasonic TOFD testing device for circumferential welds of hydraulic pressure steel pipes according to claim 1, characterized in that: Inside the housing (301), a water tank (306) and a battery (305) are fixedly connected in a front-to-back arrangement at the rear. An ultrasonic detector (308) is fixedly connected to the lower end face of the housing (301) below the battery (305). A coating pad (309) is provided on the lower end face of the housing (301) at the front end of the ultrasonic detector (308). A solenoid valve is fixedly connected to the lower end face of the housing (301) above the coating pad (309). The input end of the solenoid valve passes through the lower end face of the housing (301) and connects to the lower end face of the water tank (306). On the lower inner wall of the water storage tank (306), a water inlet valve is fixedly connected at the center of the upper end face of the water storage tank (306). A top cover (302) is provided on the upper end face of the housing (301). A turntable (303) is provided at the center of the upper end face of the top cover (302). A second lead screw (304) is fixedly connected to the lower end face of the turntable (303). A groove (307) is provided at the center of the lower end face of the housing (301). The second lead screw (304) is threaded through the upper end face of the top cover (302) and the lower inner wall of the housing (301) to the inside of the groove (307).

6. The automated ultrasonic TOFD testing device for circumferential welds of hydraulic pressure steel pipes according to claim 1, characterized in that: Taking one of the chain connectors (1) as an example, the chain connector (1) includes a housing (101), and a base (103) is provided at the lower part of the interior of the housing (101). A micro servo motor (104) is fixedly connected to the center of the upper end face of the base (103). A first lead screw (105) is fixedly connected to the output end of the micro servo motor (104). The first lead screw (105) is threadedly connected to the upper inner wall of the housing (101). Guide rods (106) are fixedly connected to the four opposite corners of the upper end face of the base (103). The four guide rods (106) are slidably connected to the base (103). On the upper inner wall of the outer shell (101), multiple connecting chains (102) are provided on the outer side of the pressure pipes (4) at both ends of the outer shell (101). One end of each of the multiple connecting chains (102) is fixedly connected to a support rod (107) at the center of the front end face of the outer shell (101), and the other end of each of the multiple connecting chains (102) is fixedly connected to a clamping plate (108) at the center of the rear end face of the outer shell (101). The multiple clamping plates (108) are respectively sleeved on the outer side of the multiple support rods (107). A second hub (112) is rotatably connected to one end face of each of the multiple connecting chains (102) near the center of the pressure pipe (4).

7. The automated ultrasonic TOFD testing device for circumferential welds of hydraulic pressure steel pipes according to claim 6, characterized in that: Each of the multiple clamping plates (108) is provided with a screw (109) on one side. The screws (109) pass through one side wall of the multiple clamping plates (108), one side wall of the multiple support rods (107), and the inner side wall of the clamping plates (108) to the other side of the clamping plates (108). Each of the multiple clamping plates (108) is provided with a multiple anti-slip disc (110) on both sides. The multiple anti-slip discs (110) on one side are fixedly connected to the multiple clamping plates (108), and the multiple anti-slip discs (110) on the other side are threaded to the other side of the multiple clamping plates (108). The lower ends of the two side walls of the base (103) are rotatably connected with the first hub (111). The lower end of the two outer shells (101) that are close to each other is provided with a sliding groove (113).

8. The automated ultrasonic TOFD testing device for circumferential welds of hydraulic pressure steel pipes according to claim 1, characterized in that: The rigid connector (2) includes a first connecting plate (201) and a second connecting plate (202), which are arranged laterally. A first slot (209) is provided at the center of the end face of the first connecting plate (201) and the second connecting plate (202) that are close to each other. A first insert plate (205) is slidably connected inside each of the two first slots (209). A third connecting plate (203) and a fourth connecting plate (204) are respectively fixedly connected to the end face of the two first insert plates (205) that are close to each other. The third connecting plate (203) is close to the fourth connecting plate (204) on one side... A second slot (207) is provided at the center of the end face. A second insert plate (208) is fixedly connected to one end face of the fourth connecting plate (204) inside the second slot (207). Slides (211) are provided on the inner walls of the two first slots (209) and the inner walls of the second slot (207). Threaded posts (206) are fixedly connected to the upper end faces of the two first insert plates (205) and the second insert plate (208) inside the three slides (211). A wing nut (210) is threaded on the outer side of the three threaded posts (206) at the upper end of the first connecting plate (201), the second connecting plate (202) and the third connecting plate (203).

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