Hydrogen transmission pipeline internal crack detection equipment

Abstract

The invention relates to the technical field of hydrogen transmission pipeline detection equipment, in particular to hydrogen transmission pipeline internal crack detection equipment which comprises an internal detection component group, and the internal detection component group comprises a middle driving assembly, a front guide assembly, a rear guide assembly, a filling detection assembly and a supporting spring. The device can automatically move along the pipeline, the servo motor is used for driving the internal wheel set, the detection continuity and stability are improved, the device adopts a cardan shaft and corrugated pipe structure, the device can flexibly move in the bent pipeline, efficient crack detection in the long-distance hydrogen conveying pipeline is achieved through cooperation of internal and external detection components, and the detection efficiency is improved. And the detection efficiency of the hydrogen conveying pipeline is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen pipeline detection equipment, and in particular to a hydrogen pipeline internal crack detection equipment. Background Art

[0002] During the long-term transportation of hydrogen by hydrogen pipelines, hydrogen molecules will be adsorbed on the inner wall of the metal pipeline and decomposed into hydrogen atoms. These hydrogen atoms can diffuse into the interior of the metal lattice. Inside the metal, hydrogen atoms will gather at lattice defects (such as dislocations, grain boundaries, etc.). As hydrogen atoms accumulate, the toughness and ductility of the metal will be reduced, causing brittle fracture of the metal pipe under stress lower than its yield strength. Therefore, more durable stainless steel pipelines are often used for hydrogen transportation.

[0003] However, even the more durable stainless steel pipes will still suffer from hydrogen embrittlement after long-term use. Therefore, cracks in stainless steel pipes are regularly inspected to avoid hydrogen leakage in pipelines. The current inspection methods for stainless steel pipes are as follows:

[0004] 1. Use ultrasound to detect cracks in pipelines. Ultrasonic testing uses the propagation characteristics of ultrasound in metal pipelines to detect cracks. Ultrasonic waves are generated by the probe and transmitted to the inner wall of the pipeline through the coupling agent. When the ultrasonic wave encounters defects such as cracks, part of the ultrasonic wave will be reflected back and received by the probe. The instrument will judge the location and size of the defect based on the time, amplitude and other parameters of the reflected wave. For example, in a long-distance hydrogen transmission metal pipeline inspection, the ultrasonic probe is moved along the outer wall of the pipeline to detect whether there are cracks inside the pipeline section by section. However, when facing the bends or irregular shapes of the pipeline, the ultrasonic detection method is difficult to detect because the ultrasonic propagation path is affected. In addition, this detection method requires manual movement of the detection probe, which has low work efficiency and is not suitable for long-distance pipeline detection;

[0005] 2. Use penetrant to detect pipeline cracks. Apply penetrant on the pipeline surface. The penetrant is usually red or fluorescent and has good fluidity and permeability. The penetrant will penetrate into the open defects on the surface to achieve the purpose of detection. However, in long-distance pipeline detection, there are many operations and the workload is large.

[0006] The above two methods for hydrogen pipeline detection have limitations. In the detection of long-distance hydrogen pipelines, it is impossible to detect pipeline cracks while ensuring the detection efficiency. Summary of the invention

[0007] In order to overcome the above technical problems, the purpose of the present invention is to provide a hydrogen pipeline internal crack detection device to solve the problems mentioned in the above background technology that the current hydrogen pipeline detection cannot detect complex curved pipelines and the detection efficiency is low.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hydrogen pipeline internal crack detection device, comprising a hydrogen pipeline body, wherein an internal detection component group is arranged inside the hydrogen pipeline body, and an external detection component group is arranged outside the hydrogen pipeline body, wherein the internal detection component group and the external detection component group cooperate to detect cracks in the hydrogen pipeline body; the internal detection component group comprises a middle driving assembly, a front guiding assembly, a rear guiding assembly, a filling detection assembly and a supporting spring, wherein the front guiding assembly and the rear guiding assembly are located on both sides of the middle driving assembly, wherein the middle driving assembly comprises a middle rod, wherein a middle disc rack and an electric telescopic rod are arranged outside the middle rod, and the electric telescopic rod The transmission mechanism is a kind of intermediate wheel that is arranged on the outer surface of the intermediate wheel, and the intermediate wheel hub is provided with a plurality of intermediate wheels, and a plurality of intermediate wheels are provided with a plurality of intermediate wheels, and a plurality of intermediate wheels are provided with a plurality of intermediate wheels. A magnetic block 1 is connected to the side of the connecting rod 1, and a front end cover is arranged on the outside of the ring wheel 1; the rear guide component includes a core rod component 2, and the core rod component 2 is fixedly connected to a middle disk component 2 through a through hole, and the middle disk component 2 is in sliding contact with a supporting rod 2 through a sliding groove, and one end of the supporting rod 2 is rotatably connected to a guide wheel component 2, and a side column component 2 is connected to the side of the supporting rod 2, and a ring wheel 2 is arranged on the outside of the side column component 2, and a servo motor 2 is arranged inside the ring wheel 2, and a magnetic block 2 is connected to the side of the supporting rod 2, and a rear end cover is arranged on the outside of the ring wheel 2; the filling detection component includes an external air pipe component, one end of the external air pipe component is connected to a gas branch pipe, and a rear end cover is arranged on the outside of the gas branch pipe A sealed airbag, a middle air pipe and a front sealed airbag are arranged on one side of the gas branch pipe, an external liquid pipe is arranged on the side of the external air pipe piece, one end of the external liquid pipe is connected to a transfer liquid tank box, the side of the transfer liquid tank box is connected to a middle cylinder piece, the side of the middle cylinder piece is arranged with an end connecting piece, a liquid distribution pipe is arranged on one side of the middle cylinder piece, and a liquid spray head is arranged at one end of the liquid distribution pipe; the external detection component group includes an external corrugated sleeve, a ring piece is arranged inside the external corrugated sleeve, a wheel frame body and an outer roller piece are arranged inside the ring piece, an external magnetic suction block is connected to the side of the ring piece, and a bottom box, a water drop detection sensor and an audible and visual alarm light are arranged at the bottom of the external corrugated sleeve.

[0009] Preferably: the two ends of the middle rod are respectively connected to the core rod member 1 and the core rod member 2 through a universal shaft, the middle rod is fixedly connected to the middle disc frame through a through hole, the electric telescopic rod, the movable frame, the middle guide rod, the annular seal, the middle wheel, the synchronous belt assembly and the driving servo motor are all provided with two groups, and the two groups of electric telescopic rods, the movable frame, the middle guide rod, the annular seal, the middle wheel, the synchronous belt assembly and the driving servo motor are symmetrically distributed on both sides of the middle disc frame, one end of the middle guide rod is connected to the middle disc frame, the middle guide rod is in sliding contact with the movable frame through a slide groove, the middle wheel is in contact with the inner wall of the hydrogen transmission pipeline body, the two ends of the electric telescopic rod are respectively rotatably connected to the middle disc frame and the movable frame, the annular seal is connected to the middle ring cover through a through groove, the annular seal is in sliding contact with the movable frame through the groove, the synchronous belt assembly is connected between the middle wheel and the working end of the driving servo motor, the driving servo motor is installed inside the movable frame, and the middle ring cover is fixedly connected to the middle disc frame through a bracket.

[0010] Preferably: the supporting rod 1, the guide wheel component 1 and the side column component 1 are all provided in four groups, and the four groups of supporting rod 1, the guide wheel component 1 and the side column component 1 are evenly distributed on the outside of the middle disk component 1, the guide wheel component 1 contacts the inner wall of the hydrogen transmission pipeline body, the supporting rod 1 slides in contact with the front end cover through the sealing filler, the side column component 1 slides in contact with the ring wheel 1 through the slide groove, the working end of the servo motor 1 is connected with a gear, and the ring wheel 1 is provided with a matching gear ring at the position corresponding to the gear, the matching gear ring meshes with the gear at the working end of the servo motor 1, the magnetic block 1 is connected to the supporting rod 1 through the bracket, one end of the magnetic block 1 is connected to a gasket, and the magnetic block 1 contacts the inner wall of the hydrogen transmission pipeline body through the gasket, and the servo motor 1 is connected to the middle disk component 1 through the mounting frame.

[0011] Preferably: the supporting rod 2, the guide wheel component 2 and the side column component 2 are all provided in four groups, and the four groups of supporting rod 2, the guide wheel component 2 and the side column component 2 are evenly distributed on the outside of the middle disk component 2, the guide wheel component 2 contacts the inner wall of the hydrogen transmission pipeline body, the supporting rod 2 is in sliding contact with the rear end cover through the sealing filler, the side column component 2 is in sliding contact with the ring wheel 2 through the slide groove, the working end of the servo motor 2 is connected with a gear, and the position of the ring wheel 2 corresponding to the gear is equipped with a matching gear ring, the matching gear ring meshes with the gear at the working end of the servo motor 2, the magnetic block 2 is connected to the supporting rod 2 through the bracket, one end of the magnetic block 2 is connected with a gasket, and the magnetic block 2 contacts the inner wall of the hydrogen transmission pipeline body through the gasket, and the servo motor 2 is connected to the middle disk component 2 through the mounting frame.

[0012] Preferably: the front end cover and the middle ring cover are connected via a bellows, the middle ring cover is connected to the rear end cover via a bellows, two support springs are provided, the first support spring is connected between the front end cover and the middle ring cover, and the first support spring contacts the inner wall of the bellows between the middle ring cover and the front end cover, and the second support spring is connected between the middle ring cover and the rear end cover, and the second support spring contacts the inner wall of the bellows between the middle ring cover and the rear end cover.

[0013] Preferably: two of the outer gas pipe and the gas branch pipe are provided, the gas branch pipe is fixedly connected to the inside of the middle cylinder through a through groove, the gas branch pipe has two gas outlets and one gas inlet, the two gas outlets of the gas branch pipe are respectively connected to the rear sealing airbag and the middle gas pipe, the gas branch pipe is connected to the end connector through a through hole, the end connector is provided with two groups, the first group of the end connectors is connected between the front sealing airbag and the front end cover, the second group of the end connectors is connected between the rear sealing airbag and the rear The two outer air pipe parts are respectively an air inlet pipe and an air outlet pipe, the rear sealing airbag and the front sealing airbag are both used to seal the hydrogen transmission pipeline body, the rear sealing airbag is connected to the middle cylinder part, the middle air pipe passes through the middle disk part 2, the middle disk frame and the middle disk part 1 to connect the front sealing airbag, the liquid distribution pipe is connected between the transfer liquid tank box and the liquid spray head, the liquid distribution pipe passes through the middle cylinder part, the end connecting part and the middle disk part 2, the liquid spray head is fixedly connected to the middle ring cover through the through hole, and the liquid outlet end of the liquid spray head extends out of the middle ring cover.

[0014] Preferably: the ring parts are provided in two groups, and the two groups of ring parts are connected to the two end positions of the external corrugated sleeve, the outer roller part is rotatably connected to the inside of the wheel frame body, the wheel frame body and the outer roller part are provided in four groups, and the four groups of wheel frame bodies and outer roller parts are distributed in the ring part in a ring shape, the wheel frame body is connected to the ring part through a groove, the outer magnetic block is connected to the ring part through a bracket, one end of the outer magnetic block is connected to a gasket, and the outer magnetic block contacts the outer surface of the hydrogen transmission pipeline body through the gasket, the magnetic block 1 and the outer magnetic block are magnetically matched, and the outer roller part contacts the outer surface of the hydrogen transmission pipeline body.

[0015] Preferably: the bottom box is made of rubber material, the bottom box is connected to the external corrugated sleeve through a groove, seven groups of water drop detection sensors are arranged, and the seven groups of water drop detection sensors are evenly distributed in the bottom box, the water drop detection sensors are connected to the bottom box, the water drop detection sensors are electrically connected to the sound and light alarm lights, and the sound and light alarm lights are connected to the bottom of the bottom box.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The internal detection component group is responsible for the movement of the entire device and the sealing of the pipeline, and for the injection of gas and water. The external detection component group is responsible for detecting water leakage. After detection, it can give an alarm to determine the approximate location of the pipeline crack, which is convenient for subsequent more accurate detection. Through the cooperation of the internal and external detection component groups, this device realizes efficient crack detection of the hydrogen pipeline, and has a high detection efficiency in long-distance stainless steel hydrogen transmission pipelines;

[0018] 2. The equipment can automatically move along the pipeline, relying on the driving servo motor to drive the internal wheel group to detect different areas of the pipeline in turn. The overall design not only reduces the burden of manual operation, but also ensures the continuity and stability of the equipment in long-distance detection;

[0019] 3. In the designed device, the connection positions of the middle drive assembly, the front guide assembly and the rear guide assembly are all connected by universal shafts, and the external structure also adopts a deformable bellows structure, so that the detection device can move in the curved pipe in actual use, and then the crack plugging detection of the horizontally curved pipe can be performed to ensure the practicality of the overall detection device.

[0020] 4. The designed middle drive assembly, front guide assembly and rear guide assembly can be adjusted to adapt to the diameter of the hydrogen pipeline body, which is suitable for the detection of hydrogen pipelines of various diameters. A sealing airbag is set in the design to complete the sealing of both ends of the pipeline through gas expansion, which can also adapt to pipelines of different diameters, thereby improving the applicability of the overall detection device to pipes of different diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure inside the integral hydrogen transmission pipeline body of the present invention;

[0023] Figure 3 It is a schematic structural diagram of a two-dimensional cross-section of the detection state of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure inside the internal detection component group of the present invention;

[0025] Figure 5 It is a structural schematic diagram of the middle driving assembly, the front guiding assembly, the rear guiding assembly and the filling detection assembly of the present invention;

[0026] Figure 6 It is a schematic structural diagram of the middle driving assembly and the rear guiding assembly of the present invention;

[0027] Figure 7It is a structural schematic diagram of the middle driving assembly part of the present invention;

[0028] Figure 8 It is a cross-sectional structural schematic diagram of the middle driving assembly part of the present invention;

[0029] Fig. 9 It is a structural schematic diagram of the front guide assembly part of the present invention;

[0030] Fig.10 It is a structural schematic diagram of the rear guide assembly part of the present invention;

[0031] Fig.11 It is a schematic diagram of the two-dimensional structure of the back end of the present invention;

[0032] Fig.12 For the present invention Fig.11 Schematic diagram of the cross-sectional structure at the AA position;

[0033] Fig.13 For the present invention Fig.11 Schematic diagram of the cross-sectional structure at the middle BB position;

[0034] Fig.14 For the present invention Fig.13 Schematic diagram of the structure at A in the middle.

[0035] In the figure: 01, hydrogen pipeline body; 02, internal detection component group; 21, middle drive assembly; 211, middle rod; 212, middle disc frame; 213, electric telescopic rod; 214, mobile frame; 215, middle guide rod; 216, annular seal; 217, middle wheel; 218, synchronous belt assembly; 219, driving servo motor; 2110, middle ring cover; 22, front guide assembly; 221, core rod piece 1; 222, middle disc piece 1; 223, support rod 1; 224, guide wheel piece 1; 225, side column piece 1; 226, ring wheel 1; 227, servo motor 1; 228, magnetic block 1; 2210, front end cover; 23, rear guide assembly; 231, core rod piece 2; 232, middle disc piece 2; 233, support rod 2 ; 234, guide wheel component 2; 235, side column component 2; 236, ring wheel 2; 237, servo motor 2; 238, magnetic block 2; 2310, rear end cover; 24, filling detection assembly; 241, external air pipe component; 242, gas branch pipe; 243, rear sealing airbag; 244, middle air pipe; 245, front sealing airbag; 246, external liquid pipe; 247, transfer liquid tank box; 248, middle cylinder component; 249, end connector; 2410, liquid distribution pipe; 2411, liquid spray head; 25, support spring; 03, external detection component group; 31, external corrugated sleeve; 32, ring component; 33, wheel frame body; 34, external roller component; 35, external magnetic block; 38, bottom box; 39, water drop detection sensor; 310, sound and light alarm light. DETAILED DESCRIPTION

[0036] See also Figure 1-14An embodiment of the present invention provides: a hydrogen pipeline internal crack detection device, comprising a hydrogen pipeline body 01, an internal detection component group 02 is arranged inside the hydrogen pipeline body 01, and an external detection component group 03 is arranged outside the hydrogen pipeline body 01, and the internal detection component group 02 and the external detection component group 03 are used to detect cracks in the hydrogen pipeline body 01; the internal detection component group 02 comprises a middle driving component 21, a front guiding component 22, a rear guiding component 23, a filling detection component 24 and a supporting spring 25, the front guiding component 22 and the rear guiding component 23 are located on both sides of the middle driving component 21, and the middle driving component 21 comprises a middle rod 211, and the middle rod 211 is provided with a middle disc rack 212 and an electric telescopic rod 2 13. One end of the electric telescopic rod 213 is rotatably connected to a moving frame 214, a middle guide rod 215 is arranged inside the moving frame 214, an annular seal 216 is arranged outside the moving frame 214, a middle wheel 217 is arranged inside the moving frame 214, a synchronous belt assembly 218 and a driving servo motor 219 are arranged on the side of the middle wheel 217, and a middle ring cover 2110 is arranged on the outside of the moving frame 214; the front guide assembly 22 includes a core rod member 221, the core rod member 221 is fixedly connected to a middle disk member 222 through a through hole, the middle disk member 222 is slidably contacted with a supporting rod 223 through a sliding groove, one end of the supporting rod 223 is rotatably connected to a guide wheel member 224, and the side of the supporting rod 223 is connected to a side column member 1 225, a ring wheel 226 is arranged on the outside of the side column member 225, a servo motor 227 is arranged inside the ring wheel 226, a magnetic block 228 is connected to the side of the supporting rod 223, and a front end cover 2210 is arranged on the outside of the ring wheel 226; the rear guide assembly 23 includes a core rod member 231, the core rod member 231 is fixedly connected to a middle plate member 232 through a through hole, the middle plate member 232 is in sliding contact with the supporting rod 233 through a sliding groove, one end of the supporting rod 233 is rotatably connected to a guide wheel member 234, the side of the supporting rod 233 is connected to the side column member 235, a ring wheel 236 is arranged on the outside of the side column member 235, a servo motor 237 is arranged inside the ring wheel 236, and the side of the supporting rod 233 A second magnetic block 238 is connected, and a rear end cover 2310 is arranged on the outside of the second ring wheel 236; the filling detection component 24 includes an outer gas pipe 241, one end of the outer gas pipe 241 is connected to a gas branch pipe 242, a rear sealing airbag 243 is arranged on the outside of the gas branch pipe 242, a middle gas pipe 244 and a front sealing airbag 245 are arranged on one side of the gas branch pipe 242, an outer liquid pipe 246 is arranged on the side of the outer gas pipe 241, one end of the outer liquid pipe 246 is connected to a transfer liquid tank box 247, a middle cylinder 248 is connected to the side of the transfer liquid tank box 247, an end connecting piece 249 is arranged on the side of the middle cylinder 248, a liquid dispensing pipe 2410 is arranged on one side of the middle cylinder 248, and a liquid spray head 2411 is arranged on one end of the liquid dispensing pipe 2410;The external detection component group 03 includes an external corrugated sleeve 31, a ring member 32 is arranged inside the external corrugated sleeve 31, a wheel frame body 33 and an external roller member 34 are arranged inside the ring member 32, an external magnetic block 35 is connected to the side of the ring member 32, and a bottom box 38, a water drop detection sensor 39 and an audible and visual alarm lamp 310 are arranged at the bottom of the external corrugated sleeve 31. ;

[0037] The two ends of the middle rod 211 are connected to the core rod piece 1 221 and the core rod piece 2 231 respectively through a universal shaft, and the middle rod 211 is fixedly connected to the middle disk frame 212 through a through hole. The electric telescopic rod 213, the movable frame 214, the middle guide rod 215, the annular seal 216, the middle wheel 217, the synchronous belt assembly 218 and the driving servo motor 219 are all provided with two groups, and the two groups of electric telescopic rods 213, the movable frame 214, the middle guide rod 215, the annular seal 216, the middle wheel 217, the synchronous belt assembly 218 and the driving servo motor 219 are symmetrically distributed on both sides of the middle disk frame 212, and one end of the middle guide rod 215 and The middle disc rack 212 is connected, the middle guide rod 215 is in sliding contact with the mobile frame 214 through the slide groove, the middle wheel 217 is in contact with the inner wall of the hydrogen transmission pipeline body 01, and the two ends of the electric telescopic rod 213 are respectively rotatably connected to the middle disc rack 212 and the mobile frame 214, the annular seal 216 is connected to the middle ring cover 2110 through the through groove, and the annular seal 216 is in sliding contact with the mobile frame 214 through the groove, and the synchronous belt assembly 218 is connected between the middle wheel 217 and the working end of the driving servo motor 219, and the driving servo motor 219 is installed inside the mobile frame 214, and the middle ring cover 2110 is fixedly connected to the middle disc rack 212 through the bracket.

[0038] The support rod 223, the guide wheel 224 and the side column 225 are all provided with four groups, and the four groups of support rods 223, the guide wheel 224 and the side column 225 are evenly distributed on the outside of the middle plate 222, the guide wheel 224 contacts the inner wall of the hydrogen transmission pipeline body 01, the support rod 223 slides in contact with the front end cover 2210 through the sealing filler, and the side column 225 slides in contact with the ring wheel 226 through the slide groove, and the servo The working end of the servo motor 227 is connected to a gear, and a matching ring gear is installed at the position of the ring wheel 226 corresponding to the gear, and the matching ring gear meshes with the gear at the working end of the servo motor 227. The magnetic block 228 is connected to the support rod 223 through a bracket, and a gasket is connected to one end of the magnetic block 228, and the magnetic block 228 contacts the inner wall of the hydrogen transmission pipeline body 01 through the gasket. The servo motor 227 is connected to the middle disk part 222 through a mounting frame.

[0039] The supporting rod 233, the guide wheel 234 and the side column 235 are all provided with four groups, and the four groups of the supporting rod 233, the guide wheel 234 and the side column 235 are evenly distributed on the outside of the middle plate 232. The guide wheel 234 contacts the inner wall of the hydrogen transmission pipeline body 01, the supporting rod 233 slides in contact with the rear end cover 2310 through the sealing filler, and the side column 235 slides in contact with the ring wheel 236 through the slide groove, and the servo The working end of the servo motor 237 is connected to a gear, and a matching ring gear is installed at the position of the ring wheel 236 corresponding to the gear, and the matching ring gear meshes with the gear at the working end of the servo motor 237. The magnetic block 238 is connected to the support rod 233 through a bracket, and a gasket is connected to one end of the magnetic block 238, and the magnetic block 238 is in contact with the inner wall of the hydrogen transmission pipeline body 01 through the gasket. The servo motor 237 is connected to the middle disk part 232 through a mounting frame.

[0040] The front end cover 2210 and the middle ring cover 2110 are connected by a bellows, and the middle ring cover 2110 is connected to the rear end cover 2310 by a bellows. Two support springs 25 are provided, the first support spring 25 is connected between the front end cover 2210 and the middle ring cover 2110, and the first support spring 25 contacts the inner wall of the bellows between the middle ring cover 2110 and the front end cover 2210, and the second support spring 25 is connected between the middle ring cover 2110 and the rear end cover 2310, and the second support spring 25 contacts the inner wall of the bellows between the middle ring cover 2110 and the rear end cover 2310.

[0041] There are two outer gas pipes 241 and two gas branch pipes 242. The gas branch pipes 242 are fixedly connected to the inside of the middle cylinder 248 through the through groove. The gas branch pipes 242 have two gas outlets and one gas inlet. The two gas outlets of the gas branch pipes 242 are respectively connected to the rear sealing airbag 243 and the middle gas pipe 244. The gas branch pipes 242 are connected to the end connectors 249 through the through holes. The end connectors 249 are provided with two groups. The first group of end connectors 249 is connected between the front sealing airbag 245 and the front end cover 2210, and the second group of end connectors 249 is connected between the rear sealing airbag 243 and the rear end cover 2310. The two outer gas pipes 241 are respectively the air inlet pipe and the air outlet pipe, the rear sealing airbag 243 and the front sealing airbag 245 are both used to seal the hydrogen transmission pipeline body 01, the rear sealing airbag 243 is connected to the middle cylinder part 248, the middle air pipe 244 passes through the middle disk part 232, the middle disk frame 212 and the middle disk part 1 222 to connect to the front sealing airbag 245, the liquid distribution tube 2410 is connected between the transfer liquid tank box 247 and the liquid spray head 2411, the liquid distribution tube 2410 passes through the middle cylinder part 248, the end connecting part 249 and the middle disk part 232, the liquid spray head 2411 is fixedly connected to the middle ring cover 2110 through the through hole, and the liquid outlet end of the liquid spray head 2411 extends out of the middle ring cover 2110.

[0042] There are two groups of ring members 32, and the two groups of ring members 32 are connected to the two end positions of the external corrugated sleeve 31, the outer roller member 34 is rotatably connected to the inside of the wheel frame body 33, there are four groups of wheel frame body 33 and outer roller member 34, and the four groups of wheel frame body 33 and outer roller member 34 are distributed in the ring member 32 in a ring shape, the wheel frame body 33 is connected to the ring member 32 through a groove, the outer magnetic block 35 is connected to the ring member 32 through a bracket, one end of the outer magnetic block 35 is connected to a gasket, and the outer magnetic block 35 contacts the outer surface of the hydrogen transmission pipeline body 01 through the gasket, the magnetic block 228 and the outer magnetic block 35 are magnetically matched, and the outer roller member 34 contacts the outer surface of the hydrogen transmission pipeline body 01.

[0043] The bottom box 38 is made of rubber, and the bottom box 38 is connected to the external corrugated sleeve 31 through a groove. There are seven groups of water drop detection sensors 39, and the seven groups of water drop detection sensors 39 are evenly distributed in the bottom box 38. The water drop detection sensor 39 is connected to the bottom box 38, and the water drop detection sensor 39 is electrically connected to the sound and light alarm light 310. The sound and light alarm light 310 is connected to the bottom of the bottom box 38. The middle wheel 217 is connected to the movable frame 214 through a rotating shaft. The end of the external liquid pipe 246 away from the transfer liquid tank box 247 is connected to the external liquid pump. The ends of the two external gas pipes 241 away from the gas branch pipe 242 are respectively connected to the external inflation pump and the suction pump. The ring wheel 1 226 is in sliding contact with the middle disk part 1 222 through the slide groove, and the ring wheel 1 226 can rotate on the middle disk part 1 222. The ring wheel 2 236 is in sliding contact with the middle disk part 232 through the slide groove, and the ring wheel 2 236 can rotate on the middle disk part 232.

[0044] Working principle: When conducting the inspection, first close the hydrogen pipeline to prevent hydrogen leakage, and open the lower end of the hydrogen pipeline body 01 to ensure that air and water can circulate, and then put the whole device into the pipeline through the opening of the hydrogen delivery pipeline. At this time, in the overall device structure, the middle wheel 217, the guide wheel component 234 and the guide wheel component 1 224 will contact the inner wall of the pipeline, and the rear sealing airbag 243 and the front sealing airbag 245 are in a non-inflated state and do not contact the hydrogen pipeline body 01. Then, the external detection component group 03 is put on the outside of the hydrogen pipeline body 01, and the two external magnetic blocks 35 in the external detection component group 03 are magnetically matched with the magnetic block 1 228 and the magnetic block 2 238 respectively. The magnetic block 1 228 and the magnetic block 2 238 are in contact with the inner wall of the hydrogen pipeline body 01 through the gasket, and the external magnetic block 35 is in contact with the outer wall of the hydrogen pipeline body 01 through the gasket;

[0045] By controlling the driving servo motor 219 in the middle driving assembly 21 to start, the driving servo motor 219 starts to drive the middle wheel 217 to rotate through the working end and the synchronous belt assembly 218, and then the rotation of the middle wheel 217 allows the entire device to move in the hydrogen transmission pipeline body 01. When the internal detection component group 02 moves, due to the magnetic attraction of the two external magnetic blocks 35, the magnetic block 1 228 and the magnetic block 2 238, the movement of the internal detection component group 02 will drive the movement of the external detection component group 03, and then the entire detection device moves in the pipeline. When it moves to the detection section, the internal detection component group 03 is stopped. 02 is moved by controlling the air pump connected to one end of the outer air pipe 241 to start. The air pump draws external air into the outer air pipe 241, and then inflates the air into the rear sealed airbag 243 through the outer air pipe 241 and the gas branch pipe 242. The gas branch pipe 242 also rushes the gas into the front sealed airbag 245 through the middle air pipe 244. At this time, the rear sealed airbag 243 and the front sealed airbag 245 are inflated, and the a1 and a2 areas are filled at the two end positions of the internal detection component group 02 under the influence of air pressure to block the hydrogen transmission pipeline body 01. At this time, the internal a3 area (such as Figure 3 As shown), then the liquid pump at one end of the external liquid tube 246 is started, the liquid pump will pump the water into the external liquid tube 246, and then the water will enter the transfer liquid tank box 247, and then it will be input into the spray head 2411 through the liquid distribution tube 2410, and sprayed into the a3 chamber area through the discharge end of the spray head 2411. When there is a crack in the hydrogen pipeline body 01 in the a3 area, due to the pressure of the water in a3, the water will be discharged to the outside of the hydrogen pipeline body 01 through the crack, and the external corrugated sleeve 31 in the external detection component group 03 outside the hydrogen pipeline body 01 will block the water, and the blocked water will flow into under the influence of gravity. The bottom box 38 will then contact the water drop detection sensor 39. The water drop detection sensor 39 is a resistive water liquid detection sensor. It uses the conductivity of water liquid. When water liquid flows into the bottom box 38, it will contact the water drop detection sensor 39, so that the water drop detection sensor 39 forms a closed loop. The water drop detection sensor 39 controls the sound and light alarm light 310 to start. The sound and light alarm light 310 will send out a sound and light alarm to warn that there is a crack in the pipeline at this position. Subsequent operators can remove the external detection component group 03, perform ultrasonic detection or penetration detection on the surface of the hydrogen transmission pipeline body 01, and accurately locate the abnormal position of the detected part.

[0046] When the sound and light alarm lamp 310 does not sound an alarm, the vacuum pump connected to one end of the external air pipe 241 is controlled to extract the gas in the rear sealing airbag 243 and the front sealing airbag 245, and then the water in a3 will flow into the hydrogen pipeline body 01, and as the hydrogen pipeline body 01 is discharged to the outside, the driving servo motor 219 in the middle driving component 21 is then controlled to continue to move the entire detection device forward, and the moving direction is toward the middle driving component 21. After moving to the position, the above-mentioned inflation and liquid flushing are performed to detect the cracks in the hydrogen pipeline body 01;

[0047] The designed middle drive assembly 21, front guide assembly 22 and rear guide assembly 23 can all be adjusted to adapt to the diameter of the hydrogen transmission pipeline body 01. The adjustment of the middle drive assembly 21 and the rear guide assembly 23 is started by controlling the servo motor 1 227 and the servo motor 2 237, and the ring wheel 1 226 and the ring wheel 2 236 are driven to rotate through the gears and the ring gear, so that the side column 1 225 slides in the slide groove of the ring wheel 1 226, and the support rod 1 223 and the support rod 2 233 are extended or retracted, so as to achieve the purpose of adapting to the diameter of the hydrogen transmission pipeline body 01.

Claims

1. A hydrogen pipeline internal crack detection device, comprising a hydrogen pipeline body, characterized in that: An internal detection component group is arranged inside the hydrogen transmission pipeline body, and an external detection component group is arranged outside the hydrogen transmission pipeline body. The internal detection component group and the external detection component group cooperate to perform crack detection on the hydrogen transmission pipeline body; The internal detection component group includes a middle driving assembly, a front guiding assembly, a rear guiding assembly, a filling detection assembly and a supporting spring, the front guiding assembly and the rear guiding assembly are located on both sides of the middle driving assembly, the middle driving assembly includes a middle rod, a middle disc rack and an electric telescopic rod are arranged outside the middle rod, one end of the electric telescopic rod is rotatably connected to a moving frame, a middle guiding rod is arranged inside the moving frame, an annular sealing member is arranged outside the moving frame, a middle wheel is arranged inside the moving frame, a synchronous belt assembly and a driving servo motor are arranged on the side of the middle wheel, and a middle ring cover is arranged outside the moving frame; The front guide assembly comprises a core rod member, the core rod member is fixedly connected to a middle disk member through a through hole, the middle disk member is in sliding contact with a supporting rod member through a sliding groove, one end of the supporting rod member is rotatably connected to a guide wheel member, the side of the supporting rod member is connected to a side column member, a ring wheel is arranged outside the side column member, a servo motor is arranged inside the ring wheel, a magnetic block is connected to the side of the supporting rod member, and a front end cover is arranged outside the ring wheel; The rear guide assembly includes a core rod component 2, the core rod component 2 is fixedly connected to a middle disk component 2 through a through hole, the middle disk component 2 is slidably contacted with a support rod 2 through a slide groove, one end of the support rod 2 is rotatably connected to a guide wheel component 2, the side of the support rod 2 is connected to a side column component 2, the outside of the side column component 2 is provided with a ring wheel 2, the inside of the ring wheel 2 is provided with a servo motor 2, the side of the support rod 2 is connected to a magnetic suction block 2, and the outside of the ring wheel 2 is provided with a rear end cover; The filling detection assembly includes an outer gas pipe, one end of the outer gas pipe is connected to a gas branch pipe, a rear sealing airbag is arranged outside the gas branch pipe, a middle gas pipe and a front sealing airbag are arranged on one side of the gas branch pipe, an outer liquid pipe is arranged on the side of the outer gas pipe, one end of the outer liquid pipe is connected to a transfer liquid tank box, a middle cylinder is connected to the side of the transfer liquid tank box, an end connecting piece is arranged on the side of the middle cylinder, a liquid dispensing pipe is arranged on one side of the middle cylinder, and a liquid spray head is arranged on one end of the liquid dispensing pipe; The external detection component group includes an external corrugated sleeve, a ring member is arranged inside the external corrugated sleeve, a wheel frame body and an external roller member are arranged inside the ring member, an external magnetic block is connected to the side of the ring member, and a bottom box, a water drop detection sensor and an audible and visual alarm light are arranged at the bottom of the external corrugated sleeve.

2. The hydrogen pipeline internal crack detection device according to claim 1, characterized in that: The two ends of the middle rod are respectively connected to the core rod member 1 and the core rod member 2 through a universal shaft, and the middle rod is fixedly connected to the middle disc frame through a through hole. The electric telescopic rod, the movable frame, the middle guide rod, the annular seal, the middle wheel, the synchronous belt assembly and the driving servo motor are all provided with two groups, and the two groups of electric telescopic rods, the movable frame, the middle guide rod, the annular seal, the middle wheel, the synchronous belt assembly and the driving servo motor are symmetrically distributed on both sides of the middle disc frame, one end of the middle guide rod is connected to the middle disc frame, the middle guide rod is in sliding contact with the movable frame through a slide groove, the middle wheel is in contact with the inner wall of the hydrogen transmission pipeline body, the two ends of the electric telescopic rod are respectively rotatably connected to the middle disc frame and the movable frame, the annular seal is connected to the middle ring cover through a through groove, the annular seal is in sliding contact with the movable frame through the groove, the synchronous belt assembly is connected between the middle wheel and the working end of the driving servo motor, the driving servo motor is installed inside the movable frame, and the middle ring cover is fixedly connected to the middle disc frame through a bracket.

3. The hydrogen pipeline internal crack detection device according to claim 1, characterized in that: The supporting rod 1, the guide wheel component 1 and the side column component 1 are all provided in four groups, and the four groups of supporting rod 1, the guide wheel component 1 and the side column component 1 are evenly distributed on the outside of the middle disk component 1, the guide wheel component 1 contacts the inner wall of the hydrogen transmission pipeline body, the supporting rod 1 is in sliding contact with the front end cover through the sealing filler, the side column component 1 is in sliding contact with the ring wheel 1 through the slide groove, the working end of the servo motor 1 is connected with a gear, and the position of the ring wheel 1 corresponding to the gear is equipped with a matching gear ring, the matching gear ring meshes with the gear of the working end of the servo motor 1, the magnetic block 1 is connected to the supporting rod 1 through the bracket, one end of the magnetic block 1 is connected with a gasket, and the magnetic block 1 contacts the inner wall of the hydrogen transmission pipeline body through the gasket, and the servo motor 1 is connected to the middle disk component 1 through the mounting frame.

4. The hydrogen pipeline internal crack detection device according to claim 1, characterized in that: The supporting rod 2, the guide wheel component 2 and the side column component 2 are all provided in four groups, and the four groups of supporting rod 2, the guide wheel component 2 and the side column component 2 are evenly distributed on the outside of the middle disk component 2. The guide wheel component 2 contacts the inner wall of the hydrogen transmission pipeline body, the supporting rod 2 is in sliding contact with the rear end cover through the sealing filler, the side column component 2 is in sliding contact with the ring wheel 2 through the slide groove, the working end of the servo motor 2 is connected with a gear, and the position of the ring wheel 2 corresponding to the gear is equipped with a matching gear ring, and the matching gear ring meshes with the gear at the working end of the servo motor 2, the magnetic block 2 is connected to the supporting rod 2 through the bracket, one end of the magnetic block 2 is connected with a gasket, and the magnetic block 2 contacts the inner wall of the hydrogen transmission pipeline body through the gasket, and the servo motor 2 is connected to the middle disk component 2 through the mounting frame.

5. The hydrogen pipeline internal crack detection device according to claim 1, characterized in that: The front end cover and the middle ring cover are connected by a bellows, and the middle ring cover is connected to the rear end cover by a bellows. Two support springs are provided, the first support spring is connected between the front end cover and the middle ring cover, and the first support spring contacts the inner wall of the bellows between the middle ring cover and the front end cover, and the second support spring is connected between the middle ring cover and the rear end cover, and the second support spring contacts the inner wall of the bellows between the middle ring cover and the rear end cover.

6. The hydrogen pipeline internal crack detection device according to claim 1, characterized in that: The outer gas pipe and the gas branch pipe are both provided with two, and the gas branch pipe is fixedly connected to the inside of the middle cylinder through a through groove, and the gas branch pipe has two gas outlet ends and one gas inlet end, and the two gas outlet ends of the gas branch pipe are respectively connected to the rear sealing airbag and the middle air pipe, and the gas branch pipe is connected to the end connector through a through hole, and the end connector is provided with two groups, the first group of the end connectors is connected between the front sealing airbag and the front end cover, and the second group of the end connectors is connected between the rear sealing airbag and the rear end The two outer air pipe parts are respectively an air inlet pipe and an air outlet pipe, the rear sealing airbag and the front sealing airbag are both used to seal the hydrogen transmission pipeline body, the rear sealing airbag is connected to the middle cylinder part, the middle air pipe passes through the middle disk part 2, the middle disk frame and the middle disk part 1 to connect the front sealing airbag, the liquid distribution pipe is connected between the transfer liquid tank box and the liquid spray head, the liquid distribution pipe passes through the middle cylinder part, the end connecting part and the middle disk part 2, the liquid spray head is fixedly connected to the middle ring cover through a through hole, and the liquid outlet end of the liquid spray head extends out of the middle ring cover.

7. The hydrogen pipeline internal crack detection device according to claim 1, characterized in that: The ring member is provided with two groups, and the two groups of ring members are connected to the two end positions of the external corrugated sleeve, the outer roller member is rotatably connected to the inside of the wheel frame body, the wheel frame body and the outer roller member are provided with four groups, and the four groups of wheel frame bodies and outer roller members are distributed in the ring member in a ring shape, the wheel frame body is connected to the ring member through a groove, the outer magnetic block is connected to the ring member through a bracket, one end of the outer magnetic block is connected to a gasket, and the outer magnetic block contacts the outer surface of the hydrogen transmission pipeline body through the gasket, the magnetic block 1 and the outer magnetic block are magnetically matched, and the outer roller member contacts the outer surface of the hydrogen transmission pipeline body.

8. The hydrogen pipeline internal crack detection device according to claim 1, characterized in that: The bottom box is made of rubber material, and the bottom box is connected to an external corrugated sleeve through a groove. Seven groups of water drop detection sensors are provided, and the seven groups of water drop detection sensors are evenly distributed in the bottom box. The water drop detection sensors are connected to the bottom box, and the water drop detection sensors are electrically connected to the sound and light alarm lights, and the sound and light alarm lights are connected to the bottom of the bottom box.

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