A kind of gas cylinder plastic liner girth weld detection system

Abstract

The utility model discloses a kind of gas cylinder plastic inner bag ring weld detection systems, it includes sink unit, two clamping units and detection unit, the sink unit includes sink body;Two The clamping unit is set on the sink body, and is equally included walking assembly, lifting assembly, clamping assembly and rotating assembly, the walking assembly can reciprocate linear motion along the length direction of the sink body, the lifting assembly is connected with the walking assembly, and can be moved up and down, the clamping assembly is used to clamp inner bag end, the rotating assembly connects the lifting assembly and the clamping assembly, for driving the clamping assembly rotation, to make inner bag rotate around its own axis.The utility model has the beneficial effects that: the gas cylinder plastic inner bag ring weld detection system of the utility model, strong adaptability, high detection efficiency, high degree of automation, can satisfy the batch detection demand of multiple specifications inner bag.

Description

Technical Field

[0001] This utility model relates to the field of non-destructive testing technology, and in particular to a system for inspecting the circumferential weld seam of a gas cylinder's plastic inner liner. Background Technology

[0002] Currently, there are two main types of inner liners for high-pressure hydrogen storage cylinders: metal inner liners and plastic inner liners. For 70MPa cylinders, plastic inner liners are widely used due to their light weight, good fatigue performance, and lack of hydrogen embrittlement issues. However, compared to the one-piece molding process of metal inner liners, plastic inner liners are generally manufactured using a circumferential welding method. As a core component of high-pressure hydrogen storage equipment, the welding quality of the circumferential weld of the plastic inner liner directly affects the safety of the equipment. Therefore, it is necessary to perform non-destructive testing on the circumferential weld of the produced plastic inner liners to determine whether there are defects such as flat-bottomed holes or square grooves, ensuring that the plastic inner liners meet the quality control requirements for vehicle-mounted compressed hydrogen cylinders.

[0003] Traditional testing systems suffer from poor adaptability, low testing efficiency, and insufficient automation when performing non-destructive testing on the circumferential welds of plastic inner liners of gas cylinders. They also struggle to meet the needs of batch testing of inner liners of various specifications. Utility Model Content The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a gas cylinder plastic inner liner circumferential weld inspection system to solve the technical problems of poor adaptability, low inspection efficiency, and low degree of automation in the existing inspection system, which makes it difficult to meet the batch inspection needs of multiple specifications of inner liners.

[0004] To achieve the above technical objectives, the present invention provides a gas cylinder plastic inner liner circumferential weld inspection system, comprising: A water tank unit, which includes a water tank body; Two clamping units are both disposed on the water tank body and each includes a walking component, a lifting component, a clamping component, and a rotating component. The walking component can reciprocate linearly along the length direction of the water tank body. The lifting component is connected to the walking component and can move up and down. The clamping component is used to clamp the end of the inner liner. The rotating component is connected to the lifting component and the clamping component and is used to drive the clamping component to rotate so that the inner liner rotates around its own axis. The detection unit is located inside the water tank body and can reciprocate linearly along the length of the water tank body to reach the circumferential weld and detect the circumferential weld.

[0005] Furthermore, the water tank unit also includes a rack, which is horizontally arranged on one side of the water tank body along its length and is fixedly connected to the water tank body. The walking assembly includes a walking frame, a first gear, and a first rotation drive component. The walking frame is slidably connected to the water tank body and can reciprocate along the length of the water tank body. The first gear meshes with the rack. The fixed end of the first rotation drive component is fixedly connected to the walking frame. The output end of the first rotation drive component is coaxially fixedly connected to the first gear for driving the first gear to rotate. The lifting assembly is connected to the walking frame.

[0006] Furthermore, the lifting assembly includes a lifting seat, a lead screw, and a second rotation drive component. The lifting seat is slidably connected to the traveling frame and can move up and down along the traveling frame. The lead screw is vertically arranged, and both ends of the lead screw are rotatably connected to the traveling frame. The lifting seat has a first screw hole and is sleeved on the lead screw through the first screw hole. The first screw hole is screwed to the lead screw. The fixed end of the second rotation drive component is fixedly connected to the traveling frame, and the output end of the second rotation drive component is connected to one end of the lead screw to drive the lead screw to rotate. The rotation component is connected to the lifting seat.

[0007] Furthermore, the rotating assembly includes a third rotation drive and a transmission component. The fixed end of the third rotation drive is fixedly connected to the lifting seat, one end of the transmission component is connected to the output end of the third rotation drive, and the other end of the transmission component is connected to the clamping assembly, so as to convert the rotation of the output end of the third rotation drive into the rotation of the clamping assembly.

[0008] Furthermore, the detection unit includes a moving component, a floating component, a supporting component, and a detection component. The moving component can reciprocate linearly along the length of the water tank body. The floating component is connected to the moving component and can float up and down. The supporting component is connected to the floating component and is used to abut against both sides of the inner tank to support the inner tank. The detection component is connected to the floating component and is used to abut against the inner tank to detect the circumferential weld.

[0009] Furthermore, the movable component includes a movable base and at least two rows of movable rollers. Each of the movable rollers in each row is arranged along the length direction of the water tank body. The wheel seat of each row of movable rollers is fixedly connected to the movable base. The wheel body of each row of movable rollers is rolledly connected to the bottom of the water tank body and can reciprocate along the length direction of the water tank body. The floating component is connected to the movable base.

[0010] Furthermore, the floating assembly includes at least three sleeves, at least three guide rods, a top plate, and at least three elastic elements. Each sleeve is vertically arranged and encloses a polygonal structure. The bottom of each sleeve is fixedly connected to the movable seat. Each guide rod is vertically arranged, and the lower end of each guide rod is slidably connected to each sleeve, and can move up and down along the length of the sleeve. The top plate is fixedly connected to the top of each guide rod. Each elastic element is sleeved on each guide rod, and the lower end of each elastic element is connected to each sleeve. The upper end of each elastic element is connected to the top plate to apply a vertically upward force to the top plate. The support assembly is connected to the top plate, and the detection assembly is connected to the top plate.

[0011] Furthermore, the support assembly includes two support bases, two rows of support rollers, and a first driving component. The two support bases are slidably connected to the top plate and can reciprocate along the width direction of the water tank body. Each support roller in each row is arranged along the length direction of the water tank body. The wheel seats of the two rows of support rollers are fixedly connected to the two support bases one-to-one. The wheel bodies of the two rows of support rollers are used to abut against the sides of the inner tank to support the inner tank. The first driving component is connected to both support bases and is used to drive the two support bases to move closer to each other or further away from each other to adjust the distance between the two support bases.

[0012] Furthermore, the detection assembly includes two detection bases, two phased array probes, and a second driving component. Both detection bases are slidably connected to the top plate and can reciprocate along the length of the water tank body. The two phased array probes are fixedly connected to the two detection bases one-to-one and are used to detect circumferential welds. The second driving component is connected to both detection bases and is used to drive the two detection bases to move closer to each other or further away from each other to adjust the distance between the two detection bases.

[0013] Furthermore, the gas cylinder plastic inner liner circumferential weld inspection system also includes a blowing unit, which is disposed on the water tank body and can reciprocate linearly along the length of the water tank body to blow air into the inner liner.

[0014] Compared with the prior art, the beneficial effects of this utility model include: when inspecting the circumferential weld of the plastic inner liner of a gas cylinder, the loading robot places the inner liner between two clamping units, and then two traveling components move reciprocally in a straight line along the length of the water tank body, thereby driving the two clamping components to move reciprocally in a straight line along the length of the water tank body until the two clamping components clamp the two ends of the inner liner respectively, thus clamping and fixing the inner liner. Then, two lifting components move downward synchronously until the inner liner enters the water tank body and is submerged in clear water. Then, two rotating components simultaneously drive the corresponding clamping components to rotate, so that the inner liner can rotate around its own axis. The inspection unit moves reciprocally in a straight line along the length of the water tank body, which can reach the circumferential weld and perform a comprehensive inspection of the circumferential weld. This circumferential weld inspection system for the plastic inner liner of a gas cylinder has strong adaptability, high inspection efficiency, and a high degree of automation, and can meet the batch inspection needs of inner liners of various specifications. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of a gas cylinder plastic inner liner circumferential weld inspection system provided by this utility model; Figure 2 This is a three-dimensional structural diagram of the clamping unit provided by this utility model; Figure 3 This is a three-dimensional structural schematic diagram of the detection unit provided by this utility model; In the diagram: 100 - Water tank unit, 110 - Water tank body, 120 - Rack, 130 - First track, 140 - Second track, 200 - Clamping unit, 210 - Walking assembly, 211 - Walking frame, 212 - First gear, 213 - First rotation drive, 214 - First slider, 215 - Slide rail, 220 - Lifting assembly, 221 - Lifting seat, 222 - Lead screw, 223 - Second rotation drive, 224 - Second slider, 230 - Clamping assembly, 240 - Rotation assembly, 241 - Third rotation drive, 242 - Transmission component, 243 - Encoder, 300 - Detection unit 310 - Moving component, 311 - Moving base, 312 - Moving roller, 320 - Floating component, 321 - Sleeve, 322 - Guide rod, 323 - Top plate, 324 - Elastic element, 325 - Guide rail, 330 - Support component, 331 - Support base, 332 - Support roller, 333 - First drive component, 340 - Detection component, 341 - Detection base, 342 - Phased array probe, 343 - Second drive component, 344 - Scale, 345 - Pointer, 400 - Blowing unit, 410 - Translation component, 420 - Blower, 500 - Data processing unit, 600 - Electrical control unit. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0017] This utility model provides a gas cylinder plastic inner liner circumferential weld inspection system, the structure of which is as follows: Figure 1 - Figure 3 As shown, the system includes a water tank unit 100, two clamping units 200, and a detection unit 300. The water tank unit 100 includes a water tank body 110. The two clamping units 200 are both disposed on the water tank body 110 and each includes a walking component 210, a lifting component 220, a clamping component 230, and a rotating component 240. The walking component 210 can reciprocate linearly along the length direction of the water tank body 110. The lifting component 220 is connected to the walking component 210 and can move up and down. The clamping component 230 is used to clamp the end of the inner liner. The rotating component 240 is connected to the lifting component 220 and the clamping component 230 and is used to drive the clamping component 230 to rotate so that the inner liner rotates around its own axis. The detection unit 300 is disposed inside the water tank body 110 and can reciprocate linearly along the length direction of the water tank body 110 to reach the circumferential weld and detect the circumferential weld.

[0018] When inspecting the circumferential weld of the plastic inner liner of the gas cylinder, an appropriate amount of clean water is injected into the water tank body 110. The loading robot places the inner liner between the two clamping units 200. Then, the two traveling components 210 reciprocate linearly along the length of the water tank body 110, thereby driving the two clamping components 230 to reciprocate linearly along the length of the water tank body 110 until the two clamping components 230 clamp the two ends of the inner liner respectively, thus clamping and fixing the inner liner. Then, the two lifting components 220... The inner liner moves downwards synchronously until it enters the water tank body 110 and is submerged in clean water. Then, the two rotating components 240 simultaneously drive the corresponding clamping components 230 to rotate, allowing the inner liner to rotate around its own axis. The detection unit 300 reciprocates linearly along the length of the water tank body 110, reaching the circumferential weld and performing a comprehensive inspection of the circumferential weld. This gas cylinder plastic inner liner circumferential weld inspection system has strong adaptability, high inspection efficiency, and a high degree of automation, and can meet the batch inspection needs of inner liners of various specifications.

[0019] In a preferred embodiment, the internal cavity of the water tank body 110 is fully welded with 3mm thick 304 stainless steel plate, the external frame is welded with 50×50mm square steel, the skin is made of 2mm cold-rolled steel plate, the bottom drain outlet has a diameter of 50mm and a perimeter tilt angle of 5° to ensure thorough drainage. It is equipped with a water level sensor and an alarm device to monitor the water volume in real time. The water level monitoring adopts an immersion-type liquid level sensor, which triggers an audible and visual alarm when the water level is below the threshold. The stainless steel water tank, 304 stainless steel water-contacting components and industrial air conditioning system can operate stably under three-shift operation with a long mean time between failures.

[0020] As a preferred embodiment, please refer to Figure 1 and Figure 2 The water tank unit 100 further includes a rack 120, which is horizontally arranged along the length of the water tank body 110 on one side of the water tank body 110 and fixedly connected to the water tank body 110. The walking assembly 210 includes a walking frame 211, a first gear 212, and a first rotation drive 213. The walking frame 211 is slidably connected to the water tank body 110 and can reciprocate along the length of the water tank body 110. The first gear 212 meshes with the rack 120. The fixed end of the first rotation drive 213 is fixedly connected to the walking frame 211, and the output end of the first rotation drive 213 is coaxially fixedly connected to the first gear 212 for driving the first gear 212 to rotate. The lifting assembly 2... 20 is connected to the walking frame 211. When the first rotation drive 213 is activated, the output end of the first rotation drive 213 rotates, which can drive the first gear 212 to rotate. Since the first gear 212 meshes with the rack 120, when the first gear 212 rotates, the walking frame 211 can reciprocate along the length direction of the water tank body 110, thereby adjusting the distance between the two walking components 210, and further adjusting the distance between the two clamping units 200, so that the two clamping components 230 are respectively close to or away from the two ends of the inner liner, which can adapt to the clamping requirements of gas cylinders of different lengths. The distance adjustment range of the two walking components 210 is 800mm-3000mm, and the positioning accuracy is ±0.5mm.

[0021] As a preferred embodiment, please refer to Figure 1 and Figure 2 The first rotation drive component 213 is a first motor, and the first motor is a Siemens 1FL6 series.

[0022] As a preferred embodiment, please refer to Figure 1 and Figure 2The water tank unit 100 further includes at least two first tracks 130. Each first track 130 is horizontally arranged on both sides of the water tank body 110 along the length direction of the water tank body 110 and is fixedly connected to the water tank body 110. The walking component 210 further includes at least two first sliders 214. Each first slider 214 is fixedly connected to the walking frame 211 and is slidably connected to each of the first tracks 130. The cooperation between the first tracks 130 and the first sliders 214 can guide the movement of the walking frame 211, making the movement of the walking frame 211 more stable.

[0023] As a preferred embodiment, please refer to Figure 1 and Figure 2 The lifting assembly 220 includes a lifting seat 221, a lead screw 222, and a second rotation drive 223. The lifting seat 221 is slidably connected to the traveling frame 211 and can move up and down along the traveling frame 211. The lead screw 222 is vertically arranged, and both ends of the lead screw 222 are rotatably connected to the traveling frame 211. The lifting seat 221 has a first screw hole, and the lead screw 222 is sleeved on the lifting seat 221 through the first screw hole. The first screw hole is screwed to the lead screw 222. The fixed end of the second rotation drive 223 is fixedly connected to the traveling frame 211, and the output end of the second rotation drive 223 is connected to one end of the lead screw 222. The rotating assembly 240 is connected to the lifting seat 221, which drives the lead screw 222 to rotate. The second rotation drive 223 is activated, and the output end of the second rotation drive 223 rotates, which can drive the lead screw 222 to rotate. Since the lifting seat 221 is screwed to the lead screw 222 through the first screw hole, and the lifting seat 221 is restricted by the walking frame 211, the rotation of the lead screw 222 can be converted into the up and down movement of the lifting seat 221. On the one hand, it can adapt to the clamping requirements of inner tanks of different diameters, and on the other hand, it can move the inner tank into the water tank body 110 and submerge the inner tank in clean water.

[0024] In a preferred embodiment, the second rotation drive component 223 can be a second motor of a suitable model directly connected to one end of the lead screw 222, or it can be a transmission assembly, coupling, etc., indirectly connected to one end of the lead screw 222.

[0025] As a preferred embodiment, please refer to Figure 1 and Figure 2The walking assembly 210 further includes at least two slide rails 215, each slide rail 215 is vertically arranged and fixedly connected to the walking frame 211. The lifting assembly 220 further includes at least two second sliders 224, each second slider 224 is fixedly connected to the lifting seat 221 and is slidably connected to each slide rail 215. The cooperation between the slide rails 215 and the second sliders 224 can guide the up and down movement of the lifting seat 221, making the up and down movement of the lifting seat 221 more stable.

[0026] As a preferred embodiment, please refer to Figure 1 and Figure 2 The rotating assembly 240 includes a third rotation drive 241 and a transmission component 242. The fixed end of the third rotation drive 241 is fixedly connected to the lifting seat 221. One end of the transmission component 242 is connected to the output end of the third rotation drive 241, and the other end of the transmission component 242 is connected to the clamping assembly 230, so as to convert the rotation of the output end of the third rotation drive 241 into the rotation of the clamping assembly 230. When the third rotation drive 241 is activated, the output end of the third rotation drive 241 rotates. The transmission component 242 converts the rotation of the output end of the third rotation drive 241 into the rotation of the clamping assembly 230, thereby driving the inner liner to rotate and realizing the detection of various parts of the inner liner circumferential weld.

[0027] In a preferred embodiment, the third rotation drive 241 is a third motor.

[0028] In a preferred embodiment, the transmission component 242 is a belt drive, chain drive, or gear drive.

[0029] As a preferred embodiment, please refer to Figure 2 The clamping assembly 230 can be a pneumatic chuck to directly clamp the end of the inner liner. The clamping range of the pneumatic chuck is 200mm-650mm. Alternatively, a pin can be used to directly insert into the hole on the end face of the inner liner. The pin is made of Cr12MoV and has a surface hardening treatment. Its diameter is adapted to the process hole of the inner liner. The quick-change pin design makes it easy to replace. The clamping force is adjustable to avoid damaging the inner liner.

[0030] In a preferred embodiment, the rotational speed of the clamping assembly 230 is adjustable from 0 to 100 mm / s.

[0031] As a preferred embodiment, please refer to 1 and Figure 2The rotating component 240 also includes an encoder 243, which is located directly above the clamping component 230 and is fixedly connected to the lifting seat 221. The encoder 243 can record the circumferential position of the clamping component 230 and has a resolution of 1024p / r.

[0032] As a preferred embodiment, please refer to Figure 1 and Figure 3 The detection unit 300 includes a moving component 310, a floating component 320, a supporting component 330, and a detection component 340. The moving component 310 can reciprocate linearly along the length of the water tank body 110. The floating component 320 is connected to the moving component 310 and can float up and down. The supporting component 330 is connected to the floating component 320 and is used to abut against both sides of the inner tank to support it. The detection component 340 is connected to the floating component 320 and is used to abut against the inner tank to detect the circumferential weld. When the inner tank is submerged in clean water, by operating the moving component 310, the moving component 310 can reciprocate linearly along the length of the water tank body 110 and reach the circumferential weld. Under the action of the floating component 320, the supporting component 330 can abut against the inner tank, and the detection component 340 can detect the circumferential weld, improving the detection accuracy.

[0033] As a preferred embodiment, please refer to Figure 1 and Figure 3 The movable component 310 includes a movable base 311 and at least two rows of movable rollers 312. Each of the movable rollers 312 in each row is arranged along the length direction of the water tank body 110. The wheel seat of each row of movable rollers 312 is fixedly connected to the movable base 311. The wheel body of each row of movable rollers 312 is rolledly connected to the bottom of the water tank body 110 and can reciprocate along the length direction of the water tank body 110. The floating component 320 is connected to the movable base 311. When the movable base 311 is pushed by hand, under the action of each row of movable rollers 312, the movable base 311 can reciprocate along the length direction of the water tank body 110 to adapt to the position of the inner liner circumferential weld.

[0034] As a preferred embodiment, please refer to Figure 1 and Figure 3The water tank unit 100 further includes at least two second tracks 140. Each second track 140 is horizontally arranged at the bottom of the water tank body 110 along the length direction of the water tank body 110 and is fixedly connected to the water tank body 110. The wheels of each row of movable rollers 312 are rolledly connected to each second track 140 in a one-to-one correspondence and can reciprocate along the length direction of the second track 140. The second track 140 can guide the movable rollers 312, making the movement of the movable rollers 312 more stable.

[0035] As a preferred embodiment, please refer to Figure 1 and Figure 3 The floating assembly 320 includes at least three sleeves 321, at least three guide rods 322, a top plate 323, and at least three elastic elements 324. Each sleeve 321 is vertically arranged and encloses a polygonal structure. The bottom of each sleeve 321 is fixedly connected to the movable seat 311. Each guide rod 322 is vertically arranged, and the lower end of each guide rod 322 is slidably connected to each sleeve 321 in a one-to-one correspondence, and can move up and down along the length of each sleeve 321. The top plate 323 and the top of each guide rod 322 are... The elastic elements 324 are fixedly connected, each elastic element 324 is sleeved on each guide rod 322, and the lower end of each elastic element 324 is connected to each sleeve 321. The upper end of each elastic element 324 is connected to the top plate 323 to apply a vertically upward force to the top plate 323. The support assembly 330 is connected to the top plate 323, and the detection assembly 340 is connected to the top plate 323. The structure of the floating assembly 320 allows the support assembly 330 and the detection assembly 340 to abut against the inner liner.

[0036] As a preferred embodiment, please refer to Figure 3 The elastic element 324 is a spring.

[0037] As a preferred embodiment, please refer to Figure 1 and Figure 3The support assembly 330 includes two support bases 331, two rows of support rollers 332, and a first driving member 333. Both support bases 331 are slidably connected to the top plate 323 and can reciprocate along the width direction of the water tank body 110. Each support roller 332 in each row is arranged along the length direction of the water tank body 110. The wheel seats of the two rows of support rollers 332 are fixedly connected to the two support bases 331 one-to-one. The wheel bodies of the two rows of support rollers 332 are used to abut against both sides of the inner liner to support it. The first driving member 333 is connected to both support bases 331 and is used for… The two support bases 331 are driven to move closer to each other or further apart to adjust the distance between them. The elastic element 324 causes the support rollers 332 to fit tightly against the inner liner surface, which supports and positions the inner liner. By operating the first drive element 333, the two support bases 331 can be driven closer to each other, adjusting the distance between them and thus adjusting the distance between the two rows of support rollers 332. Under the action of the elastic element 324, the support rollers 332 fit tightly against the inner liner surface, supporting and positioning the inner liner.

[0038] As a preferred embodiment, please refer to Figure 1 and Figure 3 The floating component 320 further includes at least two guide rails 325. Each guide rail 325 is horizontally arranged on the top plate 323 along the width direction of the water tank body 110 and is fixedly connected to the top plate 323. The two support bases 331 are slidably connected to each guide rail 325 and can reciprocate along the length direction of the guide rail 325. The guide rails 325 can guide the support bases 331.

[0039] As a preferred embodiment, please refer to Figure 3 The first driving member 333 is a first driving rod, which is provided with two first threads with opposite directions and equal lengths. The two support bases 331 are each provided with a second screw hole, and are sleeved on the first driving rod through the second screw hole. The two second screw holes are screwed into the two first threads one by one. When the first driving rod is rotated in the forward or reverse direction, the two support bases 331 can move closer to each other or move away from each other when the first driving rod is rotated in the forward or reverse direction.

[0040] As a preferred embodiment, please refer to Figure 1 and Figure 3 The detection assembly 340 includes two detection bases 341, two phased array probes 342, and a second driving member 343. Both detection bases 341 are slidably connected to the top plate 323 and can reciprocate along the length of the water tank body 110. The two phased array probes 342 are fixedly connected to the two detection bases 341 in a one-to-one correspondence and are used to detect circumferential welds. The second driving member 343 is connected to both detection bases 341 and is used to drive the two detection bases 341 closer together or further apart to adjust the distance between them. The frequencies of the two phased array probes 342 are 5MHz and 7.5MHz, respectively. The elastic member 324 ensures that the phased array probes 342 abut against the inner liner. The phased array probe 342 is angled to match the curvature of the inner liner. The detection base 341 is equipped with an adjustment knob to precisely adjust the water layer thickness and the distance between the phased array probe 342 and the weld. The detection component 340 has a scale and locking function. This gas cylinder plastic inner liner circumferential weld detection system has high detection accuracy. The adaptive floating probe ensures a stable sound beam incident angle. The phased array technology enables precise location and quantification of defects with an error ≤ ±10%. By operating the second driving component 343, the second driving component 343 can drive the two detection bases 341 to move closer to each other, adjusting the distance between the two detection bases 341, thereby adjusting the distance between the two phased array probes 342, satisfying the requirement for precise adjustment of the distance between the leading edge of the phased array probe 342 and the circumferential weld.

[0041] In a preferred embodiment, the frequencies of the two phased array probes 342 are 5MHz and 7.5MHz, respectively. Each phased array probe 342 has 32 array elements with an element spacing of 0.6mm. The swing angle adjustment range is ±15°, the water layer adjustment range is 5-20mm, and the probe leading edge adjustment range is 0-50mm, all of which are achieved by micrometer knobs with an accuracy of ±0.1mm.

[0042] As a preferred embodiment, please refer to Figure 3 The top plate 323 is provided with a sliding groove, which extends along the length of the water tank body 110. Both detection bases 341 are slidably connected to the sliding groove and can reciprocate along the length of the sliding groove. The sliding groove can guide the movement of the detection bases 341.

[0043] As a preferred embodiment, please refer to Figure 3The second driving component 343 is a second driving rod, which is provided with two second threads of opposite direction and equal length. Each of the two detection bases 341 is provided with a third screw hole, and is sleeved on the second driving rod through the third screw hole. The two third screw holes are screwed one-to-one with the two second threads. When the second driving rod is rotated in the forward or reverse direction, the two detection bases 341 can move closer to each other or move away from each other when the second driving rod is rotated in the forward or reverse direction.

[0044] As a preferred embodiment, please refer to Figure 3 The detection component 340 also includes two scales 344 and two pointers 345. The two scales 344 are horizontally arranged along the length of the water tank body 110 and are fixedly connected to the two support bases 331 one by one. The two pointers 345 are horizontally arranged along the width of the water tank body 110 and are fixedly connected to the two detection bases 341 one by one. They serve as indicators to facilitate manual adjustment of the position of the phased array probe 342.

[0045] As a preferred embodiment, please refer to Figure 3 The detection unit 300 includes at least two units, and each detection unit 300 is arranged at intervals along the length direction of the water tank body 110. The two detection units 300 correspond to two circumferential welds, which can improve the detection efficiency of the inner tank.

[0046] As a preferred embodiment, please refer to Figure 1 The gas cylinder plastic inner liner circumferential weld inspection system also includes a blowing unit 400, which is set on the water tank body 110 and can reciprocate linearly along the length of the water tank body 110 to blow air onto the inner liner, accelerating the evaporation of moisture on the inner liner surface. This gas cylinder plastic inner liner circumferential weld inspection system automatically completes the entire process from inner liner clamping, rotation, inspection to blowing and sorting. The inspection time for a single inner liner is as short as 8 seconds, meeting the needs of mass production.

[0047] As a preferred embodiment, please refer to Figure 1The blowing unit 400 is located on one side of the inner liner and includes a translation component 410 and a blower 420. The translation component 410 is slidably connected to the water tank body 110 and can reciprocate linearly along the length of the water tank body 110. The blower 420 is connected to the translation component 410 and is used to blow air into the inner liner. During the reciprocating linear motion of the translation component 410 along the length of the water tank body 110, the blower 420 blows air into the inner liner, which can achieve full air blowing into the inner liner.

[0048] In a preferred embodiment, the translation component 410 includes a translation seat, a second gear, and a fourth rotation drive. The translation seat is slidably connected to the water tank body 110 and can reciprocate along the length direction of the water tank body 110. The second gear meshes with the rack 120. The fixed end of the fourth rotation drive is fixedly connected to the translation seat, and the output end of the fourth rotation drive is coaxially fixedly connected to the second gear to drive the second gear to rotate. When the fourth rotation drive is activated, the output end of the fourth rotation drive rotates, which can drive the second gear to rotate. Since the second gear meshes with the rack 120, when the second gear rotates, the second gear can move along the length direction of the rack 120.

[0049] In a preferred embodiment, the walking component 210 further includes a third slider, which is fixedly connected to the translation seat and slidably connected to the first track 130. The cooperation between the first track 130 and the third slider can guide the movement of the translation seat, making the movement of the translation seat more stable.

[0050] In a preferred embodiment, the fourth rotation drive is a fourth motor.

[0051] As a preferred embodiment, please refer to Figure 1 The gas cylinder plastic inner liner circumferential weld inspection system further includes a data processing unit 500, which is electrically connected to the phased array probe 342 and is used to process the data detected by the phased array probe 342.

[0052] In a preferred embodiment, the data processing unit 500 has a host repetition frequency of 1-5kHz, a sampling rate of 100MHz, supports dynamic depth focusing, and has built-in standards such as GB / T 42612-2023 in its software. It can automatically determine whether defects exceed the standard and generate an Excel format inspection report.

[0053] As a preferred embodiment, please refer to Figure 1The gas cylinder plastic inner liner circumferential weld inspection system further includes an electrical control unit 600. The electrical control unit 600 is electrically connected to the first rotation drive 213, the second rotation drive 223, the third rotation drive 241, and the fourth rotation drive, and is used to control the start and stop of the first rotation drive 213, the second rotation drive 223, the third rotation drive 241, and the fourth rotation drive. The electrical control unit 600 adopts a Siemens S7-1200 PLC, the touch screen is a Siemens KTP1200, the scanning gun recognition speed is ≥5 times / second, and the industrial control computer is equipped with an I5-6500 processor, 16G memory, and a 120G solid-state drive to ensure smooth data processing.

[0054] To better understand this utility model, the following is combined with... Figure 1 - Figure 3 The working principle of the technical solution of this utility model will be described in detail below: When inspecting the circumferential weld of the plastic inner liner of the gas cylinder, an appropriate amount of clean water is injected into the water tank body 110. The loading robot places the inner liner between the two clamping units 200. Then, the two first rotation drive components 213 are activated. The output end of the first rotation drive component 213 rotates, which can drive the first gear 212 to rotate. Since the first gear 212 meshes with the rack 120, when the first gear 212 rotates, the walking frame 211 can reciprocate along the length direction of the water tank body 110, thereby adjusting the distance between the two walking components 210, and further adjusting the distance between the two clamping units 200, so that the two clamping components 230 move closer to or further away from the inner liner. The two ends can accommodate gas cylinders of different lengths. When the two clamping components 230 are close to the two ends of the inner liner, they can clamp the two ends of the inner liner to fix it. Then, the two second rotation drive components 223 are activated. The output end of the second rotation drive component 223 rotates in the forward direction, which can drive the lead screw 222 to rotate in the forward direction. Since the lifting seat 221 is screwed to the lead screw 222 through the first screw hole, and the lifting seat 221 is restricted by the walking frame 211, the rotation of the lead screw 222 can be converted into the downward movement of the lifting seat 221 until the inner liner enters the water tank body 110 and is submerged in clean water. Then the two... When the third rotation drive 241 is activated, its output end rotates. The transmission component 242 converts the rotation of the output end of the third rotation drive 241 into the rotation of the clamping assembly 230, allowing the inner liner to rotate around its own axis. When the movable seat 311 is manually pushed, it reciprocates along the length of the water tank body 110 under the action of the rows of movable rollers 312, reaching the circumferential weld. By operating the first drive 333, the two support bases 331 can be driven closer together, adjusting the distance between them, thereby adjusting the distance between the two rows of support rollers 332. Under the action of the elastic element 324, element 332 is pressed tightly against the surface of the inner liner, supporting and positioning the inner liner. By operating the second driving element 343, the second driving element 343 can drive the two detection bases 341 to move closer to each other, adjusting the distance between the two detection bases 341, thereby adjusting the distance between the two phased array probes 342. This ensures precise adjustment of the distance between the leading edge of the phased array probe 342 and the circumferential weld. Under the action of the elastic element 324, the phased array probe 342 is pressed tightly against the surface of the inner liner, performing a comprehensive inspection of the circumferential weld of the inner liner. After the inspection of the circumferential weld of the inner liner is completed, the inner liner is removed from the water surface, and then the fourth rotation driving element is activated, and the output end of the fourth rotation driving element rotates.The second gear can be driven to rotate. Since the second gear meshes with the rack 120, when the second gear rotates, it can move along the length of the rack 120, thereby driving the blower 420 to move along the length of the water tank body 110. This allows for comprehensive airflow to the inner liner, accelerating the evaporation of moisture from the inner liner surface. The electronic control unit 600 controls the robotic arm to sort the workpieces to the qualified area or the pending judgment area based on the detection results. This gas cylinder plastic inner liner circumferential weld inspection system has strong adaptability, high inspection efficiency, and a high degree of automation, and can meet the batch inspection needs of inner liners of various specifications.

[0055] The gas cylinder plastic inner liner circumferential weld inspection system provided by this utility model has the following beneficial effects: (1) The gas cylinder plastic inner liner ring weld inspection system has high inspection accuracy. The adaptive floating probe ensures the stability of the sound beam incident angle. The phased array technology realizes the accurate location and quantification of defects with an error ≤ ±10%. (2) The gas cylinder plastic inner liner circumferential weld inspection system automatically completes the entire process from inner liner clamping, rotation, inspection to drying and sorting. The shortest inspection time for a single inner liner is only 8 seconds, which meets the needs of mass production. (3) This gas cylinder plastic inner liner ring weld inspection system is compatible with gas cylinder inner liners of various specifications with diameters of 200mm-650mm and lengths of 800mm-3000mm. It has strong adaptability, high inspection efficiency and high degree of automation, and can meet the batch inspection needs of inner liners of various specifications.

[0056] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A system for inspecting the circumferential weld seam of a gas cylinder's plastic inner liner, characterized in that, include: A water tank unit, which includes a water tank body; Two clamping units are both disposed on the water tank body and each includes a walking component, a lifting component, a clamping component, and a rotating component. The walking component can reciprocate linearly along the length direction of the water tank body. The lifting component is connected to the walking component and can move up and down. The clamping component is used to clamp the end of the inner liner. The rotating component is connected to the lifting component and the clamping component and is used to drive the clamping component to rotate so that the inner liner rotates around its own axis. The detection unit is located inside the water tank body and can reciprocate linearly along the length of the water tank body to reach the circumferential weld and detect the circumferential weld.

2. The gas cylinder plastic liner circumferential weld inspection system according to claim 1, characterized in that, The water tank unit further includes a rack, which is horizontally arranged on one side of the water tank body along its length and is fixedly connected to the water tank body. The walking assembly includes a walking frame, a first gear, and a first rotation drive. The walking frame is slidably connected to the water tank body and can reciprocate along the length of the water tank body. The first gear meshes with the rack. The fixed end of the first rotation drive is fixedly connected to the walking frame. The output end of the first rotation drive is coaxially fixedly connected to the first gear for driving the first gear to rotate. The lifting assembly is connected to the walking frame.

3. The gas cylinder plastic inner liner circumferential weld inspection system according to claim 2, characterized in that, The lifting assembly includes a lifting seat, a lead screw, and a second rotation drive component. The lifting seat is slidably connected to the traveling frame and can move up and down along the traveling frame. The lead screw is vertically arranged, and both ends of the lead screw are rotatably connected to the traveling frame. The lifting seat has a first screw hole and is sleeved on the lead screw through the first screw hole. The first screw hole is screwed to the lead screw. The fixed end of the second rotation drive component is fixedly connected to the traveling frame, and the output end of the second rotation drive component is connected to one end of the lead screw to drive the lead screw to rotate. The rotation component is connected to the lifting seat.

4. The gas cylinder plastic inner liner circumferential weld inspection system according to claim 3, characterized in that, The rotating assembly includes a third rotating drive and a transmission component. The fixed end of the third rotating drive is fixedly connected to the lifting seat. One end of the transmission component is connected to the output end of the third rotating drive, and the other end of the transmission component is connected to the clamping assembly, so as to convert the rotation of the output end of the third rotating drive into the rotation of the clamping assembly.

5. The gas cylinder plastic inner liner circumferential weld inspection system according to claim 1, characterized in that, The detection unit includes a moving component, a floating component, a supporting component, and a detection component. The moving component can reciprocate linearly along the length of the water tank body. The floating component is connected to the moving component and can float up and down. The supporting component is connected to the floating component and is used to abut against both sides of the inner tank to support the inner tank. The detection component is connected to the floating component and is used to abut against the inner tank to detect the circumferential weld.

6. The gas cylinder plastic inner liner circumferential weld inspection system according to claim 5, characterized in that, The movable component includes a movable base and at least two rows of movable rollers. Each of the movable rollers in each row is arranged along the length of the water tank body. The wheel seats of each row of movable rollers are fixedly connected to the movable base. The wheel bodies of each row of movable rollers are rolledly connected to the bottom of the water tank body and can reciprocate along the length of the water tank body. The floating component is connected to the movable base.

7. The gas cylinder plastic inner liner circumferential weld inspection system according to claim 6, characterized in that, The floating assembly includes at least three sleeves, at least three guide rods, a top plate, and at least three elastic elements. Each sleeve is vertically arranged and encloses a polygonal structure. The bottom of each sleeve is fixedly connected to the movable seat. Each guide rod is vertically arranged, and the lower end of each guide rod is slidably connected to each sleeve, and can move up and down along the length of the sleeve. The top plate is fixedly connected to the top of each guide rod. Each elastic element is sleeved on each guide rod, and the lower end of each elastic element is connected to each sleeve. The upper end of each elastic element is connected to the top plate to apply a vertically upward force to the top plate. The support assembly is connected to the top plate, and the detection assembly is connected to the top plate.

8. The gas cylinder plastic inner liner circumferential weld inspection system according to claim 7, characterized in that, The support assembly includes two support bases, two rows of support rollers, and a first driving component. The two support bases are slidably connected to the top plate and can reciprocate along the width of the water tank body. Each support roller in each row is arranged along the length of the water tank body. The wheel seats of the two rows of support rollers are fixedly connected to the two support bases one-to-one. The wheel bodies of the two rows of support rollers are used to abut against the sides of the inner tank to support the inner tank. The first driving component is connected to both support bases and is used to drive the two support bases to move closer to each other or further away from each other to adjust the distance between the two support bases.

9. The gas cylinder plastic inner liner circumferential weld inspection system according to claim 7, characterized in that, The detection assembly includes two detection bases, two phased array probes, and a second driving component. The two detection bases are slidably connected to the top plate and can reciprocate along the length of the water tank body. The two phased array probes are fixedly connected to the two detection bases one-to-one and are used to detect circumferential welds. The second driving component is connected to both detection bases and is used to drive the two detection bases to move closer to each other or further away from each other to adjust the distance between the two detection bases.

10. The gas cylinder plastic inner liner circumferential weld inspection system according to claim 1, characterized in that, It also includes a blower unit, which is disposed on the water tank body and can reciprocate linearly along the length of the water tank body to blow air into the inner tank.

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