Detection device for detecting welding quality of inflatable product

Abstract

The invention discloses a detection device for detecting the welding quality of an inflatable product, the detection device comprises an external detection mechanism and an internal detection mechanism, the external detection mechanism comprises a first ultrasonic probe, and the first ultrasonic probe is used for detecting the outer side of a welding joint; the internal detection mechanism comprises an air nozzle and a second ultrasonic probe, an inlet of the air nozzle is communicated with an air source, and the air nozzle is used for blowing the welded joint until the welded joint is turned over, so that the second ultrasonic probe detects the inner side of the welded joint. The problem that the internal structure is overlapped and shielded is effectively solved, the second ultrasonic probe can effectively detect the inner side of the welding joint, the inner side and the outer side of the welding joint are detected at the same time under the combined action of the first ultrasonic probe and the second ultrasonic probe, and the detection accuracy of welding defects is greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of inflatable product detection, and particularly to a detection device for detecting the welding quality of inflatable products. Background Art

[0002] With the development of PVC and polyester fiber technologies, the production technologies of inflatable pads, inflatable boats and other flexible inflatable products with self-inflation functions have developed rapidly. These products are produced using flexible materials, and the main production process is the use of high-frequency ultrasonic welding technology. Inspecting the welding quality of the products after welding is crucial for the quality control of the final products.

[0003] The most intuitive way to detect the quality of an inflatable pad is to detect whether there is air leakage after inflation. However, because the gas volume of inflatable products is generally large and the process of filling with gas is relatively long, the method of inflation detection will result in the detection time being much longer than the production time, leading to a sharp increase in production costs. With the development of machine vision technology, by processing and analyzing the images of the products, and then identifying whether there are defects in the products, it has been widely used in industrial production.

[0004] Aiming at the above related technologies, there are the following defects: in self-inflatable products, the welding material is a flexible material, and there are generally overlaps and occlusions at the welding joints. It is impossible to obtain a complete image of the weld seam directly with an imaging device, which affects the detection. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies, and propose a detection device for detecting the welding quality of inflatable products, so as to solve the technical problem that the inner side of the welding joint cannot be detected in the prior art.

[0006] To achieve the above technical purpose, the technical solution of the present invention provides a detection device for detecting the welding quality of inflatable products, including an external detection mechanism, the external detection mechanism includes a first ultrasonic probe, and the first ultrasonic probe is used to detect the outer side of the welding joint; and, an internal detection mechanism, the internal detection mechanism includes a gas nozzle and a second ultrasonic probe, the inlet of the gas nozzle is connected to a gas source, and the gas nozzle is used to blow up the welding joint until it flips, so that the second ultrasonic probe can detect the inner side of the welding joint.

[0007] In some embodiments, the detection device further includes a horizontal rail, a horizontal seat, and a first driving mechanism. The first ultrasonic probe, the second ultrasonic probe, and the air nozzle are all connected to the horizontal seat. The air nozzle is located on one side of the second ultrasonic probe. The horizontal seat is slidably connected to the horizontal rail. The fixed end of the first driving mechanism is connected to the horizontal rail, and the movable end of the first driving mechanism is connected to the horizontal seat. The first driving mechanism is used to adjust the positions of the first ultrasonic probe, the second ultrasonic probe, and the air nozzle in the horizontal direction.

[0008] In some embodiments, the detection device further includes a vertical rail, a first vertical seat, and a second driving mechanism. The vertical rail is connected to the horizontal seat. The first vertical seat is slidably connected to the vertical rail. The first ultrasonic probe, the second ultrasonic probe, and the air nozzle are all connected to the first vertical seat. The fixed end of the second driving mechanism is connected to the vertical rail, and the movable end of the second driving mechanism is connected to the first vertical seat. The second driving mechanism is used to adjust the height of the first ultrasonic probe, the second ultrasonic probe, and the air nozzle.

[0009] In some embodiments, the detection device further includes two second vertical seats and a third driving mechanism. The two second vertical seats are both slidably connected to the first vertical seat. The first ultrasonic probe is connected to one of the second vertical seats, and the second ultrasonic probe and the air nozzle are connected to the other second vertical seat. The fixed end of the third driving mechanism is connected to the first vertical seat, and the movable end of the third driving mechanism is simultaneously connected to the two second vertical seats. The third driving mechanism is used to adjust the distance between the two second vertical seats.

[0010] In some embodiments, the third driving mechanism includes a third motor and a double-headed lead screw. The third motor is installed on the first vertical seat. The double-headed lead screw is rotatably connected to the first vertical seat. The output shaft of the third motor is connected to the double-headed lead screw. The two ends of the double-headed lead screw respectively pass through the two second vertical seats and are threadedly connected to the two second vertical seats.

[0011] In some embodiments, the detection device further includes two rotating seats and a fourth driving mechanism. The two rotating seats are respectively rotatably connected to the two second vertical seats. The first ultrasonic probe is connected to one of the rotating seats, and the second ultrasonic probe and the air nozzle are both connected to the other rotating seat. The fixed end of the fourth driving mechanism is connected to the second vertical seat, and the movable end of the fourth driving mechanism is simultaneously connected to the two rotating seats. The fourth driving mechanism is used to adjust the angles of the two rotating seats.

[0012] In some embodiments, the fourth driving mechanism includes a rack and two gears. The rack is fixedly connected to the first vertical seat. The two gears are respectively fixedly connected to the two rotating seats. The two gears are simultaneously meshed with the rack.

[0013] In some embodiments, the internal detection mechanism further includes an air pipe and a filter screen. The inlet of the air nozzle is connected to a gas source through the air pipe, and the filter screen is connected inside the air pipe.

[0014] In some embodiments, the internal detection mechanism further includes an impeller, a brush, and a discharging assembly. The impeller is rotatably connected to the filter screen, the brush is fixedly connected to the impeller, the brush abuts against the filter screen, the brush is used to clean the dust on the filter screen, and the discharging assembly is used to discharge the dust out of the air pipe.

[0015] In some embodiments, the discharging assembly includes a discharging cover, a torsion spring, a wedge block, and a lever. The discharging cover is rotatably connected to the air pipe, one end of the torsion spring is connected to the discharging cover, the other end of the torsion spring is connected to the air pipe, the torsion spring causes the discharging cover to have a tendency to rotate towards the air pipe, the wedge block is connected to the inner side of the discharging cover, the lever is fixedly connected to the impeller, when the lever rotates, the end of the lever intermittently abuts against the wedge block, and the thrust of the lever is greater than the restoring force of the torsion spring, so that the discharging cover is intermittently opened.

[0016] Compared with the prior art, the beneficial effects of the present invention include: the design of blowing up the welded joint by the air nozzle effectively solves the problem of overlapping and blocking of the internal structure, enables the second ultrasonic probe to effectively detect the inner side of the welded joint, and under the combined action of the first ultrasonic probe and the second ultrasonic probe, detects from both the inside and outside of the welded joint at the same time, greatly improving the detection accuracy of welding defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the overall structural schematic diagram of the detection device provided by the present invention; Figure 2 is provided by the present invention Figure 1 The enlarged view of the partial structure at A in; Figure 3 is the overall structural sectional view of the air pipe provided by the present invention from the first perspective; Figure 4 is the overall structural sectional view of the air pipe provided by the present invention from the second perspective.

[0018] Description of the reference numerals: 1. External inspection agency; 11. First ultrasonic probe; 2. Internal inspection agency; 21. Air nozzle; 22. Second ultrasonic probe; 23. Air pipe; 24. Filter screen; 25. Impeller; 26. Brush; 27. Discharging assembly; 271. Discharging cover; 272. Torsion spring; 273. Wedge block; 274. Lever; 3. Cross rail; 31. Cross base; 32. First driving mechanism; 321. First motor; 322. First roller; 4. Longitudinal rail; 41. First longitudinal base; 42. Second driving mechanism; 421. Second motor; 422. Second roller; 5. Second longitudinal base; 51. Third driving mechanism; 511. Third motor; 512. Double-headed lead screw; 6. Rotating seat; 61. Fourth driving mechanism; 611. Rack; 612. Gear. Detailed implementation mode

[0019] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] The present invention provides a detection device for detecting the welding quality of inflatable products, and its structure is as Figure 1 - Figure 4 shown, including an external inspection agency 1 and an internal inspection agency 2.

[0021] The external inspection agency 1 includes a first ultrasonic probe 11, and the first ultrasonic probe 11 is used to detect the outside of the welded joint.

[0022] The internal inspection agency 2 includes an air nozzle 21 and a second ultrasonic probe 22. The inlet of the air nozzle 21 is connected to a gas source, and the air nozzle 21 is used to blow up the welded joint until it flips, so that the second ultrasonic probe 22 can detect the inside of the welded joint.

[0023] During use, the first ultrasonic probe 11 uses the reflection characteristics of ultrasonic waves to detect the outside of the welded joint. When ultrasonic waves are emitted from the first ultrasonic probe 11 and encounter different media on the outside of the welded joint, different degrees of reflected echoes will be generated. By analyzing the characteristics of these reflected echoes, such as time, amplitude, and phase, it is possible to determine whether there are defects such as cracks, pores, and incomplete penetration on the outside of the welded joint. The gas source supplies gas to the air nozzle 21, and the air nozzle 21 sprays the gas to lift the welded joint, facilitating the detection by the second ultrasonic probe 22. The ultrasonic waves emitted by the second ultrasonic probe 22 propagate inside the welded joint. Similarly, based on the principle that different echoes are generated when encountering different media, it is possible to detect whether there are defects inside the welded joint. Since the air nozzle 21 blows up the welded joint, it reduces the overlap and occlusion of the internal structure and improves the accuracy and reliability of the detection by the second ultrasonic probe 22.

[0024] In the present invention, the design of the nozzle 21 blowing up the welded joint effectively solves the problem of internal structure overlapping and blocking, enabling the second ultrasonic probe 22 to effectively detect the inner side of the welded joint. Under the combined action of the first ultrasonic probe 11 and the second ultrasonic probe 22, detection is carried out simultaneously from the inside and outside of the welded joint, greatly improving the detection accuracy of welding defects.

[0025] To adjust the positions of the first ultrasonic probe 11, the second ultrasonic probe 22, and the nozzle 21 in the horizontal direction, please refer to Figure 1 , in a preferred embodiment, the detection device further includes a cross rail 3, a cross seat 31, and a first driving mechanism 32. The first ultrasonic probe 11, the second ultrasonic probe 22, and the nozzle 21 are all connected to the cross seat 31. The nozzle 21 is located on one side of the second ultrasonic probe 22. The cross seat 31 is slidably connected to the cross rail 3. The fixed end of the first driving mechanism 32 is connected to the cross rail 3, and the movable end of the first driving mechanism 32 is connected to the cross seat 31. The first driving mechanism 32 is used to adjust the positions of the first ultrasonic probe 11, the second ultrasonic probe 22, and the nozzle 21 in the horizontal direction.

[0026] The first driving mechanism 32 includes a first motor 321 and a first roller 322. The first motor 321 is installed on the cross seat 31, and the first roller 322 is connected to the output shaft of the first motor 321. The first roller 322 abuts against the cross rail 3.

[0027] During use, the first roller 322 is connected to the output shaft of the first motor 321. When the output shaft of the first motor 321 rotates, it will directly drive the first roller 322 to rotate synchronously. Since the first roller 322 abuts against the cross rail 3, there is friction between the roller and the cross rail 3. When the roller rotates, under the action of the friction, the roller will roll along the cross rail 3. When the first roller 322 rolls on the cross rail 3, a force along the direction of the cross rail 3 will be generated, and this force will push the cross seat 31 to slide linearly along the cross rail 3. The first ultrasonic probe 11, the second ultrasonic probe 22, and the nozzle 21 are all connected to the cross seat 31. Therefore, when the cross seat 31 slides on the cross rail 3, it will drive these three components to move horizontally together. By controlling the forward and reverse rotation of the first motor 321, the cross seat 31 can move bidirectionally on the cross rail 3, thereby adjusting the positions of the first ultrasonic probe 11, the second ultrasonic probe 22, and the nozzle 21 in the horizontal direction to meet the detection requirements of welded joints at different positions.

[0028] To adjust the heights of the first ultrasonic probe 11, the second ultrasonic probe 22, and the nozzle 21, please refer to Figure 1, in a preferred embodiment, the detection device further includes a longitudinal rail 4, a first longitudinal seat 41, and a second driving mechanism 42. The longitudinal rail 4 is connected to the transverse seat 31. The first longitudinal seat 41 is slidably connected to the longitudinal rail 4. The first ultrasonic probe 11, the second ultrasonic probe 22, and the air nozzle 21 are all connected to the first longitudinal seat 41. The fixed end of the second driving mechanism 42 is connected to the longitudinal rail 4, and the movable end of the second driving mechanism 42 is connected to the first longitudinal seat 41. The second driving mechanism 42 is used to adjust the heights of the first ultrasonic probe 11, the second ultrasonic probe 22, and the air nozzle 21.

[0029] The second driving mechanism 42 includes a second motor 421 and a second roller 422. The second motor 421 is installed on the longitudinal seat, the second roller 422 is connected to the output shaft of the second motor 421, and the second roller 422 abuts against the longitudinal rail 4.

[0030] During use, the second roller 422 is installed on the output shaft of the second motor 421. When the output shaft of the second motor 421 rotates, it will directly drive the second roller 422 to rotate synchronously. Since the second roller 422 is in close contact with the longitudinal rail 4, a frictional force is generated between the two. This frictional force causes the rotating roller to have a tendency to roll on the longitudinal rail 4. When the second roller 422 rolls on the longitudinal rail 4, a force along the direction of the longitudinal rail 4 will be generated. Since the longitudinal rail 4 extends in the vertical direction, this force will push the first longitudinal seat 41 to slide linearly along the longitudinal rail 4, thereby realizing the change in the position of the first longitudinal seat 41 in the vertical direction. The first ultrasonic probe 11, the second ultrasonic probe 22, and the air nozzle 21 are all connected to the first longitudinal seat 41. When the first longitudinal seat 41 slides on the longitudinal rail 4, it will drive these three components to move together in the vertical direction, thereby adjusting their heights. By controlling the forward and reverse rotation of the second motor 421, the first longitudinal seat 41 can move up and down bidirectionally on the longitudinal rail 4, so as to accurately adjust the heights of the first ultrasonic probe 11, the second ultrasonic probe 22, and the air nozzle 21 to meet the detection requirements of welding joints at different heights.

[0031] To make the first ultrasonic probe 11, the second ultrasonic probe 22, and the air nozzle 21 be located on the upper and lower sides of the welding joint respectively, please refer to Figure 2 , in a preferred embodiment, the detection device further includes two second longitudinal seats 5 and a third driving mechanism 51. The two second longitudinal seats 5 are both slidably connected to the first longitudinal seat 41. The first ultrasonic probe 11 is connected to one of the second longitudinal seats 5, the second ultrasonic probe 22 and the air nozzle 21 are connected to the other second longitudinal seat 5. The fixed end of the third driving mechanism 51 is connected to the first longitudinal seat 41, and the movable end of the third driving mechanism 51 is simultaneously connected to the two second longitudinal seats 5. The third driving mechanism 51 is used to adjust the distance between the two second longitudinal seats 5.

[0032] In use, the movable end of the third driving mechanism 51 is simultaneously connected to the two second longitudinal seats 5, and it transmits the power generated by the driving mechanism to the two second longitudinal seats 5. When it is necessary to increase the distance between the two second longitudinal seats 5, the movable end of the third driving mechanism 51 will generate a force that makes the two second longitudinal seats 5 move away from each other. Since the two second longitudinal seats 5 are both slidably connected to the first longitudinal seat 41, under the action of this force, they will slide along the first longitudinal seat 41 in opposite directions, thereby increasing the distance between them. As the distance increases, the distances between the first ultrasonic probe 11, the second ultrasonic probe 22 and the nozzle 21 connected to different second longitudinal seats 5 also increase accordingly. When it is necessary to decrease the distance between the two second longitudinal seats 5, the movable end of the third driving mechanism 51 will generate a force that makes the two second longitudinal seats 5 approach each other. Under the action of this force, the two second longitudinal seats 5 will slide along the first longitudinal seat 41 in opposite directions, thereby reducing the distance between them, and further reducing the distances between the first ultrasonic probe 11, the second ultrasonic probe 22 and the nozzle 21.

[0033] To drive the two second longitudinal seats 5 to slide in opposite directions, please refer to Figure 2 , in a preferred embodiment, the third driving mechanism 51 includes a third motor 511 and a double-headed lead screw 512. The third motor 511 is installed on the first longitudinal seat 41. The double-headed lead screw 512 is rotatably connected to the first longitudinal seat 41. The output shaft of the third motor 511 is connected to the double-headed lead screw 512. The two ends of the double-headed lead screw 512 respectively pass through the two second longitudinal seats 5 and are threadedly connected to the two second longitudinal seats 5.

[0034] In use, the output shaft of the third motor 511 is directly connected to the double-headed lead screw 512. When the output shaft of the motor rotates, it will drive the double-headed lead screw 512 to rotate synchronously. Since the double-headed lead screw 512 is rotatably connected to the first longitudinal seat 41, the first longitudinal seat 41 provides a stable support and a rotation base for the lead screw, ensuring that the lead screw can rotate smoothly. The two ends of the double-headed lead screw 512 respectively pass through the two second longitudinal seats 5 and form a threaded connection with the two second longitudinal seats 5. When the double-headed lead screw 512 rotates, the second longitudinal seats 5 that are threadedly engaged with the double-headed lead screw 512 will perform linear motion along the axial direction of the double-headed lead screw 512. Since the thread pitches of the two ends of the double-headed lead screw 512 are opposite, the moving directions of the two second longitudinal seats 5 are also opposite.

[0035] To make the first ultrasonic probe 11, the second ultrasonic probe 22 and the nozzle 21 face the upper and lower sides of the welding joint respectively, please refer to Figure 2, in a preferred embodiment, the detection device further includes two rotating seats 6 and a fourth driving mechanism 61. The two rotating seats 6 are respectively rotatably connected to the two second longitudinal seats 5. The first ultrasonic probe 11 is connected to one of the rotating seats 6, and the second ultrasonic probe 22 and the air nozzle 21 are both connected to the other rotating seat 6. The fixed end of the fourth driving mechanism 61 is connected to the second longitudinal seat 5, and the movable end of the fourth driving mechanism 61 is simultaneously connected to the two rotating seats 6. The fourth driving mechanism 61 is used to adjust the angles of the two rotating seats 6.

[0036] During use, the fixed end of the fourth driving mechanism 61 is firmly connected to the second longitudinal seat 5, providing stable support for the entire driving process. When the detection device needs to adjust the angles of the two rotating seats 6, the fourth driving mechanism 61 is activated. The movable end of the fourth driving mechanism 61 is simultaneously connected to the two rotating seats 6. Since the two rotating seats 6 are respectively rotatably connected to the two second longitudinal seats 5, when the movable end moves under the drive of power, a force will be applied to the two rotating seats 6. It will push or pull the rotating seat 6 to rotate around its connection point with the second longitudinal seat 5. Because the two rotating seats 6 are respectively connected to the first ultrasonic probe 11, the second ultrasonic probe 22 and the air nozzle 21, the rotation of the rotating seat 6 will drive these detection components to change angles.

[0037] To drive the two rotating seats 6 to rotate in opposite directions, please refer to Figure 2 , in a preferred embodiment, the fourth driving mechanism 61 includes a rack 611 and two gears. The rack 611 is fixedly connected to the first longitudinal seat 41, and the two gears are respectively fixedly connected to the two rotating seats 6. The two gears are simultaneously meshed with the rack 611.

[0038] During use, the rack 611 is fixedly connected to the first longitudinal seat 41. When the two second longitudinal seats 5 move up and down in opposite directions, driven by the two second longitudinal seats 5, the two gears slide along the rack 611 and also rotate along the rack 611. Driven by the gears, the two rotating seats 6 rotate in opposite directions, thereby realizing the adjustment of the relative angles of the first ultrasonic wave, the second ultrasonic probe 22, and the air nozzle 21.

[0039] To purify the gas, please refer to Figure 3 , in a preferred embodiment, the internal detection mechanism 2 further includes an air pipe 23 and a filter screen 24. The inlet of the air nozzle 21 is connected to a gas source through the air pipe 23, and the filter screen 24 is connected inside the air pipe 23.

[0040] During use, the air pipe 23 serves as a passage connecting the air source and the air nozzle 21 and plays a crucial role in transmitting gas. The filter screen 24 is installed inside the air pipe 23. When the gas flows in the air pipe 23, the filter screen 24 filters the gas. In this way, the filter screen 24 can effectively remove impurities in the gas, preventing these impurities from entering the air nozzle 21 along with the air flow and then being blown onto the welding joint. If impurities adhere to the surface of the welding joint, it may interfere with the propagation of ultrasonic waves, resulting in deviations in the detection results of the second ultrasonic probe 22 and affecting the judgment of the welding quality. The presence of the filter screen 24 ensures the cleanliness of the gas entering the air nozzle 21 and improves the accuracy of the detection results.

[0041] For cleaning the filter screen 24, please refer to Figure 3 , in a preferred embodiment, the internal detection mechanism 2 further includes an impeller 25, a brush 26, and a discharging assembly 27. The impeller 25 is rotatably connected to the filter screen 24, the brush 26 is fixedly connected to the impeller 25, the brush 26 abuts against the filter screen 24, the brush 26 is used for cleaning the dust on the filter screen 24, and the discharging assembly 27 is used for discharging the dust from the air pipe 23.

[0042] During use, when the gas generated by the air source passes through the air pipe 23, the flowing gas has a certain kinetic energy. The impeller 25 is rotatably connected to the filter screen 24. When the gas flows through the impeller 25, it will generate an impact force on the blades of the impeller 25. This impact force will cause the impeller 25 to start rotating around its rotation axis. The brush 26 is fixedly connected to the impeller 25. When the impeller 25 rotates driven by the air flow, the brush 26 will rotate together. Since the brush 26 abuts against the filter screen 24, during the rotation process, the bristles of the brush 26 will come into full contact with the surface of the filter screen 24. It can continuously clean the surface of the filter screen 24, brush off the dust and other impurities attached to the filter screen 24, keep the filter screen 24 in a relatively clean state, and thus maintain good filtering performance. The dust swept off by the brush 26 will accumulate in the air pipe 23. The function of the discharging assembly 27 is to discharge this dust from the air pipe 23.

[0043] For discharging the dust in the air pipe 23, please refer to Figure 4, in a preferred embodiment, the discharging assembly 27 includes a discharging cover 271, a torsion spring 272, a wedge block 273 and a lever 274. The discharging cover 271 is rotatably connected to the air pipe 23. One end of the torsion spring 272 is connected to the discharging cover 271, and the other end of the torsion spring 272 is connected to the air pipe 23. The torsion spring 272 causes the discharging cover 271 to have a tendency to rotate towards the air pipe 23. The wedge block 273 is connected to the inner side of the discharging cover 271. The lever 274 is fixedly connected to the impeller 25. When the lever 274 rotates, the end of the lever 274 intermittently abuts against the wedge block 273. The thrust of the lever 274 is greater than the restoring force of the torsion spring 272, so that the discharging cover 271 is intermittently opened.

[0044] In use, the discharge cover 271 is rotatably connected to the air pipe 23. One end of the torsion spring 272 is connected to the discharge cover 271, and the other end is connected to the air pipe 23. The torsion spring 272 is in a pre-tightened state, and it applies an elastic moment to the discharge cover 271, causing the discharge cover 271 to have a tendency to rotate towards the air pipe 23, thereby closing the discharge port. When there is no other external force, the discharge cover 271 remains closed under the action of the torsion spring 272, ensuring the normal flow of gas in the air pipe 23 and preventing it from leaking from the discharge port. When the gas generated by the gas source flows in the air pipe 23, the air flow drives the impeller 25 to rotate. The lever 274 is fixedly connected to the impeller 25, so the rotation of the impeller 25 will drive the lever 274 to make a circular motion around the rotation axis of the impeller 25. The lever 274 continuously rotates with the impeller 25, providing a power source for the subsequent opening of the discharge cover 271. The wedge 273 is connected to the inner side of the discharge cover 271. When the lever 274 rotates to the end thereof and contacts the wedge 273, the lever 274 will apply a thrust to the wedge 273. Since the thrust of the lever 274 is greater than the restoring force of the torsion spring 272, this thrust will overcome the elastic moment of the torsion spring 272, causing the discharge cover 271 to rotate around its rotation connection point, thereby opening the discharge port. At this time, the dust accumulated near the discharge port swept down by the brush 26 in the air pipe 23 will be discharged from the opened discharge port under the action of the air flow in the air pipe 23. As the impeller 25 continues to rotate, the lever 274 will leave the wedge 273 and no longer apply a thrust to the wedge 273. When the lever 274 is disengaged from the wedge 273, the restoring force of the torsion spring 272 will play a dominant role again. The torsion spring 272 will cause the discharge cover 271 to rotate in the reverse direction and return to the position of closing the discharge port, restoring the airtightness of the air pipe 23 and ensuring that the gas continues to flow normally in the air pipe 23, waiting for the lever 274 to push the wedge 273 again to open the discharge cover 271 for dust removal operation next time. Since the lever 274 is fixed to the impeller 25 and the impeller 25 continuously rotates under the action of the continuous air flow, the lever 274 will periodically contact and disengage from the wedge 273. In this way, the intermittent opening of the discharge cover 271 is realized, enabling the dust in the air pipe 23 to be intermittently discharged, ensuring the cleanliness of the air pipe 23 and not affecting the normal flow and pressure stability of the gas in the air pipe 23 due to the long-term opening of the discharge cover 271, and ensuring the stable and efficient operation of the entire internal detection mechanism 2.

[0045] For a better understanding of the present invention, the following is combined with Figure 1 - Figure 4The working principle of a detection device for detecting the welding quality of inflatable products, which is a technical solution of the present invention, is described in detail: The first ultrasonic probe 11 uses the reflection characteristics of ultrasonic waves to detect the outer side of the welded joint. When ultrasonic waves are emitted from the first ultrasonic probe 11 and encounter different media on the outer side of the welded joint, different degrees of reflected echoes will be generated. By analyzing the characteristics of these reflected echoes, such as time, amplitude, and phase, it is possible to determine whether there are defects such as cracks, pores, and incomplete penetration on the outer side of the welded joint. The gas source supplies gas to the gas nozzle 21, and the gas nozzle 21 sprays out the gas to lift the welded joint, facilitating the detection by the second ultrasonic probe 22. The ultrasonic waves emitted by the second ultrasonic probe 22 propagate inside the welded joint. Similarly, based on the principle that different echoes are generated when encountering different media, it is detected whether there are defects inside the welded joint. Since the gas nozzle 21 blows up the welded joint, the overlap and occlusion of the internal structure are reduced, improving the accuracy and reliability of the detection by the second ultrasonic probe 22.

[0046] The specific implementation manners of the present invention described above do not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and deformations made according to the technical concept of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A detection device for detecting the welding quality of inflatable products, characterized in that: include: an external detection mechanism, the external detection mechanism comprising a first ultrasonic probe, the first ultrasonic probe being used to detect the outside of the weld joint; and An internal detection mechanism includes an air nozzle and a second ultrasonic probe, the inlet of the air nozzle is connected to an air source, and the air nozzle is used to blow up the welding joint until it is turned over, so that the second ultrasonic probe can detect the inside of the welding joint.

2. The detection device for detecting welding quality of inflatable products according to claim 1, characterized in that: The detection device also includes a cross rail, a cross seat and a first driving mechanism. The first ultrasonic probe, the second ultrasonic probe and the air nozzle are all connected to the cross seat. The air nozzle is located on one side of the second ultrasonic probe. The cross seat is slidably connected to the cross rail. The fixed end of the first driving mechanism is connected to the cross rail. The movable end of the first driving mechanism is connected to the cross seat. The first driving mechanism is used to adjust the horizontal positions of the first ultrasonic probe, the second ultrasonic probe and the air nozzle.

3. The detection device for detecting welding quality of inflatable products according to claim 2, characterized in that: The detection device also includes a longitudinal rail, a first longitudinal seat and a second driving mechanism, the longitudinal rail is connected to the transverse seat, the first longitudinal seat is slidably connected to the longitudinal rail, the first ultrasonic probe, the second ultrasonic probe and the air nozzle are all connected to the first longitudinal seat, the fixed end of the second driving mechanism is connected to the longitudinal rail, the movable end of the second driving mechanism is connected to the first longitudinal seat, and the second driving mechanism is used to adjust the height of the first ultrasonic probe, the second ultrasonic probe and the air nozzle.

4. The detection device for detecting welding quality of inflatable products according to claim 3, characterized in that: The detection device also includes two second vertical seats and a third driving mechanism. The two second vertical seats are slidably connected to the first vertical seat, the first ultrasonic probe is connected to one of the second vertical seats, the second ultrasonic probe and the air nozzle are connected to the other second vertical seat, the fixed end of the third driving mechanism is connected to the first vertical seat, and the movable end of the third driving mechanism is connected to the two second vertical seats at the same time. The third driving mechanism is used to adjust the distance between the two second vertical seats.

5. The detection device for detecting welding quality of inflatable products according to claim 4, characterized in that: The third driving mechanism includes a third motor and a double-ended screw. The third motor is installed on the first vertical seat. The double-ended screw is rotatably connected to the first vertical seat. The output shaft of the third motor is connected to the double-ended screw. Both ends of the double-ended screw pass through the two second vertical seats respectively and are threadedly connected to the two second vertical seats.

6. The detection device for detecting welding quality of inflatable products according to claim 4, characterized in that: The detection device also includes two rotating seats and a fourth driving mechanism. The two rotating seats are respectively rotatably connected to the two second vertical seats, the first ultrasonic probe is connected to one of the rotating seats, and the second ultrasonic probe and the air nozzle are both connected to the other rotating seat. The fixed end of the fourth driving mechanism is connected to the second vertical seat, and the movable end of the fourth driving mechanism is connected to the two rotating seats at the same time. The fourth driving mechanism is used to adjust the angles of the two rotating seats.

7. The detection device for detecting welding quality of inflatable products according to claim 6, characterized in that: The fourth driving mechanism includes a rack and two gears. The rack is fixedly connected to the first vertical seat, and the two gears are fixedly connected to two rotating seats respectively. The two gears are meshed with the rack at the same time.

8. The detection device for detecting welding quality of inflatable products according to claim 1, characterized in that: The internal detection mechanism also includes an air pipe and a filter screen. The inlet of the air nozzle is connected to the air source through the air pipe, and the filter screen is connected to the air pipe.

9. The detection device for detecting welding quality of inflatable products according to claim 8, characterized in that: The internal detection mechanism also includes an impeller, a brush and a discharge assembly. The impeller is rotatably connected to the filter, the brush is fixedly connected to the impeller, the brush abuts against the filter, the brush is used to clean dust on the filter, and the discharge assembly is used to discharge dust out of the air pipe.

10. The detection device for detecting welding quality of inflatable products according to claim 9, characterized in that: The discharge assembly includes a discharge cover, a torsion spring, a wedge block and a lever. The discharge cover is rotatably connected to the air pipe. One end of the torsion spring is connected to the discharge cover, and the other end of the torsion spring is connected to the air pipe. The torsion spring causes the discharge cover to rotate toward the air pipe. The wedge block is connected to the inner side of the discharge cover, and the lever is fixedly connected to the impeller. When the lever rotates, the end of the lever intermittently abuts against the wedge block, and the thrust of the lever is greater than the restoring force of the torsion spring, so that the discharge cover is intermittently opened.

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