A weld quality detection device

Abstract

Embodiments of the present disclosure relate to the technical field of weld detection, and one embodiment of the present disclosure provides a weld quality detection device for detecting a weld on a workpiece. The device comprises a moving mechanism, the moving mechanism comprising a first moving body and a second moving body, and being configured to adhere to the surface of the workpiece and walk on the workpiece; a flexible sealing cover, the flexible sealing cover being configured to be movably lifted and lowered relative to the first moving body and the second moving body, and having a bottom surface configured to be attached to the workpiece, the bottom surface being annular, and the flexible sealing cover being configured to be sealedly attached to the workpiece and detect the air tightness of the weld after being moved downward; a vacuum extraction pipeline, the vacuum extraction pipeline being in communication with the flexible sealing cover; and a lifting drive, the first moving body and the second moving body each being provided with the lifting drive, the lifting drive being connected to the bottom surface in the flexible sealing cover, and being configured to drive the flexible sealing cover to be lifted and lowered. Through the above technical solution, the technical problem of low weld tightness detection efficiency in the prior art is solved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present disclosure relate to the technical field of weld detection, in particular, to a weld quality detection device. BACKGROUND

[0002] Weld quality detection includes appearance detection (viewing undercut, weld protrusions and other surface defects), size detection (ensuring that the width, height, etc. meet the standards), internal defect detection (detecting pores, incomplete penetration, etc. through X-rays, ultrasonic waves, etc.), mechanical property detection (determining strength, toughness through tensile, bending, etc. tests) and chemical composition detection (analyzing the matching degree with the base material), etc. Among them, weld tightness detection is the key to ensuring that the welded structure does not leak under the action of pressure or medium. Common methods include air tightness test, ammonia test, kerosene test, helium test and vacuum box test, etc. However, in the prior art, for weld tightness detection of large and complex structures or batch products, the detection equipment needs to be moved manually multiple times, which not only consumes a lot of manpower and time, but also introduces errors due to human operation, resulting in low detection efficiency and difficulty in meeting the high production efficiency requirements of modern industry. SUMMARY

[0003] To overcome the above defects, embodiments of the present disclosure provide a weld quality detection device, which solves the technical problem of low weld tightness detection efficiency in the prior art.

[0004] According to one aspect, at least one embodiment of the present disclosure provides a weld quality detection device for detecting a weld on a workpiece, comprising:

[0005] A moving mechanism, the moving mechanism comprising a first moving body and a second moving body, the first moving body and the second moving body are both used to adhere to the surface of the workpiece and walk on the workpiece;

[0006] A flexible sealing cover, the flexible sealing cover is movably arranged relative to the first moving body and the second moving body, and has a bottom surface for abutting against the workpiece, the bottom surface is annular, and the flexible sealing cover can be sealedly attached to the workpiece and detect the air tightness of the weld after moving downward;

[0007] A vacuum pumping pipeline, the vacuum pumping pipeline is in communication with the flexible sealing cover and is used for vacuum pumping;

[0008] A lifting drive, the first moving body and the second moving body are both provided with the lifting drive, the lifting drive is connected with the bottom in the flexible sealing cover and is used for driving the flexible sealing cover to move up and down.

[0009] For example, the welding seam welding quality detection device provided by at least one embodiment of the present disclosure comprises a moving mechanism, the moving mechanism comprises a first moving body and a second moving body, the first moving body and the second moving body are movably connected through a first linear driving member, and the first moving body and the second moving body are connected through a second linear driving member.

[0010] The first moving body and the second moving body are each provided with an attachment connecting member for being attached to the surface of the workpiece, and the moving mechanism further comprises a control part for controlling the attachment connecting member to be connected to or separated from the surface of the workpiece.

[0011] For example, the welding seam welding quality detection device provided by at least one embodiment of the present disclosure comprises a moving mechanism, the moving mechanism comprises a first moving body and a second moving body, the first moving body and the second moving body are movably connected through a first linear driving member, and the first moving body and the second moving body are connected through a second linear driving member.

[0012] The control part is an electromagnetic valve assembly, and the electromagnetic valve assembly is configured to alternately fix the first suction disc and the second suction disc to the surface of the workpiece when the first moving body and the second moving body move.

[0013] For example, the welding seam welding quality detection device provided by at least one embodiment of the present disclosure comprises a moving mechanism, the moving mechanism comprises a first moving body and a second moving body, the first moving body and the second moving body are movably connected through a first linear driving member, and the first moving body and the second moving body are connected through a second linear driving member.

[0014] For example, the welding seam welding quality detection device provided by at least one embodiment of the present disclosure comprises a moving mechanism, the moving mechanism comprises a first moving body and a second moving body, the first moving body and the second moving body are movably connected through a first linear driving member, and the first moving body and the second moving body are connected through a second linear driving member.

[0015] The first swing body and the second swing body are hinged, and are used to make the first swing body and the second swing body fit the bent workpiece.

[0016] For example, the welding seam welding quality detection device provided by at least one embodiment of the present disclosure comprises a moving mechanism, the moving mechanism comprises a first moving body and a second moving body, the first moving body and the second moving body are movably connected through a first linear driving member, and the first moving body and the second moving body are connected through a second linear driving member.

[0017] For example, the welding seam welding quality detection device provided by at least one embodiment of the present disclosure comprises a moving mechanism, the moving mechanism comprises a first moving body and a second moving body, the first moving body and the second moving body are movably connected through a first linear driving member, and the first moving body and the second moving body are connected through a second linear driving member.

[0018] A ring-shaped sealing top piece is slidingly arranged in the ring-shaped groove, the bottom of the ring-shaped sealing top piece is provided with the veneer, and the inside of the ring-shaped sealing top piece is provided with a magnetic piece so that the ring-shaped sealing top piece can be magnetically adsorbed on the ferrous workpiece.

[0019] An elastic piece is arranged at one end of the groove wall of the ring-shaped groove and at the other end of the ring-shaped sealing top piece, for providing a force for sealing abutment of the ring-shaped sealing top piece and the workpiece.

[0020] For example, the welding seam welding quality detection device provided by at least one embodiment of the present disclosure comprises a first swing body and a second swing body, and the first swing body and the second swing body are respectively provided with a first extension and a second extension extending upwards, and further comprises:

[0021] A second linear driving piece is arranged at one end of the first extension and at the other end of the second extension, for driving the first swing body and the second swing body to move relatively.

[0022] For example, the welding seam welding quality detection device provided by at least one embodiment of the present disclosure comprises a first electromagnetic valve arranged on the first suction disc for controlling the on-off of the first suction disc and a second electromagnetic valve arranged on the second suction disc for controlling the on-off of the second suction disc, and further comprises:

[0023] A controller is connected with the lifting driving piece, the first linear driving piece, the first electromagnetic valve, the second electromagnetic valve and the second linear driving piece.

[0024] For example, the welding seam welding quality detection device provided by at least one embodiment of the present disclosure further comprises a leakage detection liquid coating head arranged on one side of the flexible sealing cover.

[0025] The embodiments of the present disclosure have the following beneficial effects:

[0026] In the present disclosure, the first moving body and the second moving body can walk along the welding seam, and after detecting one position, the first moving body and the second moving body walk to the next position for detection, so as to complete the detection of the whole welding seam, without the need for manual continuous operation, thereby improving the detection efficiency and meeting the needs of modern industrial efficient production. The good sealing of the flexible sealing cover and the surface of the workpiece and the control of the vacuum detection can accurately detect the air tightness problem of the welding seam, improve the detection precision and ensure the welding quality. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments of the present disclosure will be briefly introduced. Obviously, the drawings in the following description are only some example embodiments of the present disclosure. Other drawings can be obtained by those skilled in the art without any creative effort on the basis of the contents of the example embodiments of the present disclosure and the drawings.

[0028] Figure 1 The schematic diagram of the external structure of the weld joint welding quality detection device in an embodiment of the present disclosure is shown in FIG. 1.

[0029] Figure 2 The schematic diagram of the bottom structure of the weld joint welding quality detection device in an embodiment of the present disclosure is shown in FIG. 2. Figure 1

[0030] Figure 3 The schematic diagram of the top structure of the weld joint welding quality detection device in an embodiment of the present disclosure is shown in FIG. 3. Figure 1

[0031] Figure 4 The schematic diagram of the A-A cross-sectional structure in an embodiment of the present disclosure is shown in FIG. 4. Figure 3

[0032] Figure 5 The schematic diagram of the C local enlarged structure in an embodiment of the present disclosure is shown in FIG. 5. Figure 4

[0033] Figure 6 The schematic diagram of the B-B cross-sectional structure in an embodiment of the present disclosure is shown in FIG. 6. Figure 3

[0034] Figure 7 The schematic diagram of the structure of the first and second moving bodies in an embodiment of the present disclosure is shown in FIG. 7. Figure 1

[0035] Figure 8 The schematic diagram of the bottom structure of the first and second moving bodies in an embodiment of the present disclosure is shown in FIG. 8. Figure 1

[0036] In the drawings: the first moving body 100, the first swing body 110, the first extension 111, the second swing body 120, the second extension 121, the second moving body 200, the flexible sealing cover 300, the veneer 301, the annular groove 3011, the rotating shaft 302, the sealing telescopic part 303, the annular sealing top piece 304, the elastic piece 305, the vacuum extraction pipeline 400, the lifting driving piece 500, the driven walking wheel 600, the attached connecting piece 700, the first suction cup 710, the second suction cup 720, the first linear driving piece 730, the first electromagnetic valve 740, the second electromagnetic valve 750, the second linear driving piece 800, the leakage detection liquid coating head 900. DETAILED DESCRIPTION​​​​​​​

[0037] The present disclosure will be further described in details with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are merely used to explain the present disclosure, but not to limit the present disclosure.

[0038] For the simplicity of the drawings, only the parts related to the disclosure are shown in each drawing, and they do not represent the actual structure of the product. In addition, for the simplicity of the drawings and easy understanding, in some drawings, only one of the parts with the same structure or function is shown schematically, or only one of them is marked. In this document, "one" not only means "only one", but also means "more than one" situation, and "several" includes "two" and "more than two".

[0039] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0040] In the present disclosure, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.

[0041] In the description of the present embodiment, the orientation or position relationship of the terms "upper", "lower", "left", "right" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present disclosure.

[0042] In addition, in the description of the present disclosure, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] As Figures 1-8As shown, it shows a welding seam quality detection device for detecting the welding seam on the workpiece, including a moving mechanism, a flexible sealing cover 300, a vacuum pipeline 400 and a lifting drive 500, the moving mechanism includes a first moving body 100 and a second moving body 200, the first moving body 100 and the second moving body 200 are both used to adhere to the surface of the workpiece and walk on the workpiece; The flexible sealing cover 300 is movably arranged relative to the first moving body 100 and the second moving body 200, and has a surface 301 for adhering to the workpiece at the bottom, the surface 301 is annular, and the flexible sealing cover 300 can be sealedly adhered to the workpiece and detect the airtightness of the welding seam after moving downward; The vacuum pipeline 400 is in communication with the flexible sealing cover 300 and is used for vacuumizing; The first moving body 100 and the second moving body 200 are both provided with the lifting drive 500, the lifting drive 500 is connected with the bottom in the flexible sealing cover 300 and is used for driving the flexible sealing cover 300 to lift.

[0044] For example, the first moving body 100 and the second moving body 200 are the same in structure and are both cuboids, which can walk on the workpiece.

[0045] The flexible sealing cover 300 is square as a whole and is made of transparent flexible material, which is convenient for the operator to observe the internal condition. The bottom edge of the flexible sealing cover 300 is provided with an annular surface 301, and the surface 301 is made of silicone rubber material, which can enhance the sealing effect when the flexible sealing cover 300 is lowered and adhered to the workpiece.

[0046] The bottom in the flexible sealing cover 300 is connected with the output end of the lifting drive 500, so as to ensure that the flexible sealing cover 300 is firmly connected with the lifting drive 500. Meanwhile, the top or the side of the flexible sealing cover 300 is provided with an interface connected with the vacuum pipeline 400, and the interface is sealingly connected with the pipeline of the vacuum pipeline 400. The vacuum pipeline 400 is connected with the interface of the flexible sealing cover 300 through a vacuum-resistant rubber pipeline.

[0047] The lifting drive 500 on the first moving body 100 and the second moving body 200 can be selected as an electric push rod to meet the lifting requirement of the flexible sealing cover 300.

[0048] The fixed end of the electric push rod is fixedly installed on the top frame of the first moving body 100 and the second moving body 200, and the output end is connected with the bottom in the flexible sealing cover 300, so as to drive the flexible sealing cover 300 to lift through the extension and retraction of the electric push rod.

[0049] The first moving body 100 and the second moving body 200 can walk on the surface of the workpiece and move along the welding seam to detect the welding seam,

[0050] The annular surface 301 at the bottom of the flexible sealing cover 300 is made of silicone rubber material, which is elastically attached to the surface of the workpiece to form a sealed space. The flexible sealing cover 300 can be made of transparent material to facilitate observation of the inside. During detection, a leak detection liquid can be applied to the weld, and if there is a small gap causing air leakage, the leak detection liquid will bubble at the small gap due to the continuous suction of the flexible sealing cover 300 by the vacuum pipeline 400. Through the transparent flexible sealing cover 300, the operator can find that there is a defect in the weld. A vacuum pressure gauge can also be installed on the flexible sealing cover 300. During detection, the air tightness of the weld can be judged by observing the change in the value of the vacuum pressure gauge and the pressure stability after a certain period of time. If there is a leak in the weld, the pressure in the sealed space will change, thereby detecting the quality problem of the weld. In addition, the leak detection process of the prior art needs to be carried out after the container is processed. If a defect is found in the weld at this time, it is difficult to repair the workpiece. The weld quality detection device provided by the present disclosure can detect after a weld is processed. Once a defect is found in the weld, it can be repaired in time, reducing the difficulty of repair.

[0051] The lifting drive 500 is selected as an electric push rod, which is driven by a motor to rotate the screw rod to realize the extension and retraction of the push rod, thereby driving the flexible sealing cover 300 to lift. According to the detection process, the lifting action of the electric push rod is controlled to ensure that the flexible sealing cover 300 can be accurately lowered and attached to the workpiece, and then lifted away from the workpiece after completing the air tightness detection, thereby realizing automatic control of the detection process.

[0052] The first moving body 100 and the second moving body 200 can walk along the weld. After detecting a position, they walk to the next position for detection, thereby completing the detection of the entire weld without the need for manual continuous operation, improving the detection efficiency and meeting the needs of modern industrial efficient production.

[0053] The good sealing of the flexible sealing cover 300 to the surface of the workpiece and the control of the vacuum detection can accurately detect the air tightness problem of the weld, improve the detection accuracy, and ensure the welding quality.

[0054] In some examples, as shown in Figure 7 、 Figure 8 The moving mechanism further includes a first linear drive 730, and the first moving body 100 and the second moving body 200 are movably connected through the first linear drive 730. The first moving body 100 and the second moving body 200 are each provided with an attachment connecting piece 700 for attaching to the surface of the workpiece. The moving mechanism further includes a control part for controlling the attachment of the attachment connecting piece 700 to the surface of the workpiece or the detachment thereof.

[0055] The attachment connector 700 comprises a first suction cup 710 and a second suction cup 720 respectively arranged on the first mobile body 100 and the second mobile body 200, and both of which are connected with the vacuum pipeline 400.

[0056] For example, four driven walking wheels 600 are installed at the bottom of the first mobile body 100 and the second mobile body 200, which can assist in supporting and guiding during the relative movement of the first mobile body 100 and the second mobile body 200, and ensure the stability of the movement.

[0057] The flexible sealing cover 300 is designed as an accordion sealing cover, and when fully expanded, the length is equal to the maximum relative movement distance between the first mobile body 100 and the second mobile body 200. This design can flexibly expand and contract with the relative movement of the first mobile body 100 and the second mobile body 200 while ensuring sealing performance, and can also adapt to the surface of workpieces of different shapes, thereby realizing position movement for detecting subsequent welds.

[0058] The first suction cup 710 is connected with the vacuum pipeline 400 and installed at the bottom of the first mobile body 100 to ensure stable adhesion with the first mobile body 100.

[0059] The second suction cup 720 has the same structure as the first suction cup 710, is connected with the vacuum pipeline 400, and is installed at the bottom of the second mobile body 200.

[0060] The first linear drive 730 can also be an electric push rod, which can meet the driving requirements of the relative movement of the first mobile body 100 and the second mobile body 200. The fixed end of the electric push rod is connected with the side frame of the second mobile body 200, and the moving end is connected with the side frame of the first mobile body 100, to ensure firm and reliable connection. The movement speed and displacement of the electric push rod can be controlled through the control system.

[0061] By controlling the communication state of the first suction cup 710 and the second suction cup 720 with the vacuum pipeline 400, the adhesion and non-adhesion of the first mobile body 100 and the second mobile body 200 on the workpiece are realized. When the second suction cup 720 is opened, it is adsorptively attached to the surface of the workpiece under the action of the negative pressure generated by the vacuum pipeline 400, so that the second mobile body 200 is stationary relative to the workpiece; at this time, the first suction cup 710 is closed, and the first mobile body 100 can move relative to the workpiece. The first linear drive 730 acts to push the first mobile body 100 to move relative to the second mobile body 200, thereby realizing the change of the detection position. The driven walking wheels 600 play a role in assisting in supporting and guiding during the movement, to ensure the stability and accuracy of the movement.

[0062] The flexible sealing cover 300 can be an accordion sealing cover, which can cooperate to achieve the relative movement between the first mobile body 100 and the second mobile body 200. When the flexible sealing cover 300 is lowered and attached to the workpiece, the vacuum pump connected by the vacuum pipeline 400 works to form negative pressure in the sealed space, and the air tightness of the weld is observed and detected.

[0063] Through the cooperation of the first suction cup 710, the second suction cup 720, and the first linear driving member 730, the movement of the first mobile body 100 and the second mobile body 200 relative to the workpiece is realized, which can more accurately detect different positions of the weld and improve the detection accuracy.

[0064] The flexible sealing cover 300 is selected to have the telescopic property of the accordion sealing cover, which can adapt to the surface of workpieces of different shapes and the relative movement of the first mobile body 100 and the second mobile body 200, thereby enhancing the applicability of the equipment in complex working conditions and being applicable to the detection requirements of welds of different lengths.

[0065] In some examples, as shown in Figure 8 The control part is an electromagnetic valve assembly, which is configured to alternately fix the first suction cup 710 and the second suction cup 720 to the surface of the workpiece when the first mobile body 100 and the second mobile body 200 move.

[0066] The electromagnetic valve assembly includes a first electromagnetic valve 740 and a second electromagnetic valve 750, which are respectively arranged on the first suction cup 710 and the second suction cup 720 to control the opening and closing of the first suction cup 710 and the second suction cup 720.

[0067] For example, the first electromagnetic valve 740 and the second electromagnetic valve 750 can meet the requirements of quickly opening and closing the first suction cup 710 and the second suction cup 720. The first electromagnetic valve 740 is tightly installed at the air inlet of the first suction cup 710 through threaded connection, which ensures firm connection and good sealing to prevent gas leakage. Similarly, the second electromagnetic valve 750 is installed at the air inlet of the second suction cup 720 in the same way. The control end of the electromagnetic valve is connected to the control system through an electric wire to receive the electric signal sent by the control system and realize the control of the first suction cup 710 and the second suction cup 720.

[0068] The first electromagnetic valve 740 and the second electromagnetic valve 750 are arranged so that the opening and closing of the first suction cup 710 and the second suction cup 720 can be controlled. The control system controls the on-off of the gas by sending an electrical signal to the corresponding electromagnetic valve to change the spool position of the electromagnetic valve. When the electromagnetic valve is powered on, the spool moves to allow the gas to pass, so that the suction cup is in communication with the vacuum pipeline 400 and is adsorbed on the workpiece surface under the action of negative pressure; when the electromagnetic valve is powered off, the spool resets to cut off the gas passage, and the suction cup loses the negative pressure and separates from the workpiece. This control mode ensures that the movement and positioning of the first moving body 100 and the second moving body 200 on the workpiece are more accurate and flexible.

[0069] The first electromagnetic valve 740, the second electromagnetic valve 750 and the first linear drive 730 work together to realize the automatic movement detection of the detection device on the workpiece. For example, during the detection process, when the first moving body 100 needs to be moved, the control system first powers on the second electromagnetic valve 750 to make the second suction cup 720 adsorb on the workpiece to fix the second moving body 200; then powers off the first electromagnetic valve 740 to make the first suction cup 710 separate from the workpiece, and at this time, the first linear drive 730 is started to drive the first moving body 100 to move to the next detection position. This cooperative working mode improves the automation degree and efficiency of the detection process.

[0070] In some examples, as shown in Figure 1 、 Figure 2 The bottom of the flexible sealing cover 300 has a rotating shaft 302 capable of bending the bottom of the flexible sealing cover 300, for deforming the flexible sealing cover 300 to fit on the bent workpiece; the first moving body 100 and the second moving body 200 are structurally identical and each includes a first swing body 110 and a second swing body 120, the first swing body 110 is hingedly arranged on the second swing body 120, and the hinged shaft is parallel to the length direction of the weld, for making the first swing body 110 and the second swing body 120 close to and fit on the bent workpiece.

[0071] The flexible sealing cover 300 includes two cover bodies, the bottoms of the two cover bodies are connected through the rotating shaft 302, a sealing telescopic part 303 is arranged between the two cover bodies, and the two cover bodies can rotate to fit the outer surface of the bent workpiece, and the sealing telescopic part 303 can be elongated after the cover bodies rotate.

[0072] For example, the bottom edge of the flexible sealing cover 300 has a rotating shaft 302, so that the bottom of the flexible sealing cover 300 can be flexibly bent around the rotating shaft 302, thereby being able to closely fit the surface of the bent workpiece, such as the corner of a right-angle type workpiece, so as to detect the weld at the corner.

[0073] The flexible sealing cover 300 adopts a telescopic bellows sealing cover structure. The first swing body 110 is rectangular, and a hinge seat is provided at each end of one side. The hinge seat has a hinge hole for cooperating with the hinge shaft of the second swing body 120.

[0074] The second swing body 120 is also a cuboid. On the side connected to the first swing body 110, there are two hinge shafts parallel to the length of the weld. The first swing body 110 is hinged to the hinge shaft of the second swing body 120 through a hinge seat, so that the first swing body 110 can swing relative to the second swing body 120 within a certain angle range.

[0075] The pivot 302 at the bottom of the flexible sealing cover 300 allows the bottom flexible material to bend around it. When inspecting a bent workpiece, the bottom of the flexible sealing cover 300 can automatically adjust according to the bending shape of the workpiece, closely fit the workpiece surface, and ensure a good sealing effect, thereby accurately detecting the airtightness of the weld.

[0076] The first swing body 110 and the second swing body 120 of the first moving body 100 and the second moving body 200 are connected by a hinge, and the hinge axis is parallel to the weld length direction. When inspecting a bent workpiece, the first swing body 110 can swing relative to the second swing body 120, so that the moving body can better approach the surface of the bent workpiece, providing support for the accurate placement and fit of the flexible sealing cover 300, and ensuring the smooth progress of the inspection work.

[0077] In some examples, such as Figure 8 As shown, both the first swing body 110 and the second swing body 120 are provided with driven walking wheels 600; both the first swing body 110 and the second swing body 120 of the first moving body 100 are provided with first suction cups 710, and both the first swing body 110 and the second swing body 120 of the second moving body 200 are provided with second suction cups 720.

[0078] For example, the first moving body 100 and the second moving body 200 have the same structure. The bottom of the first swing body 110 and the second swing body 120 in each moving body is equipped with driven wheels 600. One driven wheel 600 is installed at each of the four corners of the bottom of the first swing body 110, and the second swing body 120 also has driven wheels 600 installed at its four corners. The driven wheels 600 provide sufficient support while ensuring flexible movement.

[0079] In the first moving body 100, a first suction cup 710 is installed on the bottom surface of both the first swing body 110 and the second swing body 120. The suction cup is connected to the bottom surface of the swing body through a mounting base. Similarly, in the second moving body 200, a second suction cup 720 is installed on the bottom surface of both the first swing body 110 and the second swing body 120, and its structure and installation method are the same as those of the first suction cup 710.

[0080] The driven walking wheels 600 are arranged on the first swing body 110 and the second swing body 120, increasing the contact points between the moving body and the workpiece surface and improving the stability during movement. The multiple walking wheels work together to better adapt to the unevenness of the workpiece surface, ensuring smooth movement of the moving body on the workpiece and providing a basis for accurate detection. At the same time, the first swing body 110 and the second swing body 120 are each provided with a suction cup, allowing the moving body to be more flexibly fixed at different positions on the workpiece during detection, and also ensuring positioning stability and enhancing positioning accuracy. For example, when detecting a bent workpiece, the suction cups at different positions can be kept adsorbed or released, cooperating with the swing of the swing body to make the moving body better fit the shape of the workpiece for detection.

[0081] The rotating shaft 302 at the bottom of the flexible sealing cover 300 allows the two cover bodies to adaptively deform according to the bending shape of the workpiece and closely fit the surface of the workpiece. The arrangement of multiple suction cups ensures stable fixation of the moving body at various complex positions, thereby ensuring that the flexible sealing cover 300 always maintains a good sealing state during detection. The vacuum pipe 400 communicates with the flexible sealing cover 300, and in the case of good sealing, the air tightness of the weld is accurately detected.

[0082] In some examples, as shown in FIG. 1, the top middle and both sides of the flexible sealing cover 300 are provided with sealing expansion sections 303 that allow the flexible sealing cover 300 to bend. Figure 1

[0083] For example, the top middle and both sides of the flexible sealing cover 300 are provided with sealing expansion sections 303. These sealing expansion sections 303 are made of flexible material and have a length that matches the length of the top and both sides of the flexible sealing cover 300. The sealing expansion sections 303 are integrally formed with the main body of the flexible sealing cover 300, ensuring firm connection and good sealing.

[0084] The rotating shaft 302 at the edge of the bottom of the flexible sealing cover 300 cooperates with the sealing expansion sections 303. The rotating shaft 302 is located at the middle position of the edge of the bottom of the flexible sealing cover 300, and the facing surface 301 is also made of flexible material. The rotating shaft 302 is inside the facing surface 301, so that the facing surface 301 stably bends and can be sealed and fitted with the workpiece.

[0085] When the bottom of the flexible sealing cover 300 rotates around the rotating shaft 302, the sealing expansion sections 303 at the top and both sides can bend synchronously, making the flexible sealing cover 300 better fit the surface of the bent workpiece as a whole, such as the corner of a right-angle workpiece. Not only is the bottom sealed, but gaps at the top and both sides are also prevented, improving the overall sealing performance.

[0086] ​In combination with the sealing telescopic part 303 and the rotating shaft 302, the flexibility of the flexible sealing cover 300 is ensured, and the adaptability to complex-shaped workpieces is enhanced.

[0087] The sealing telescopic part 303 at the top and both sides of the flexible sealing cover 300 cooperates with the rotating shaft 302 at the bottom. When the bottom of the flexible sealing cover 300 is bent to fit the shape of the bottom of the workpiece due to the rotation of the rotating shaft 302, the sealing telescopic part 303 can be bent synchronously, ensuring that the flexible sealing cover 300 can still ensure surface fitting when facing the bent workpiece, forming a good sealing space and effectively avoiding detection errors caused by poor sealing.

[0088] The first swing body 110 and the second swing body 120 of the first moving body 100 and the second moving body 200 are connected by a hinge, and the hinge shaft direction is parallel to the length direction of the weld. When detecting a bent workpiece, the first swing body 110 can swing relative to the second swing body 120, so that the moving body can better approach the surface of the bent workpiece, providing support for accurate placement and fitting of the flexible sealing cover 300 and ensuring smooth detection work.

[0089] In some examples, the bottom of the flexible sealing cover 300 has an annular groove 3011, and the flexible sealing cover 300 further includes an annular sealing top piece 304 and an elastic piece 305. The annular sealing top piece 304 is slidingly arranged in the annular groove 3011, the bottom of the annular sealing top piece 304 has a surface 301, and the inside of the annular sealing top piece 304 has a magnetic piece so that the annular sealing top piece 304 can be magnetically attached to the ferrous workpiece. One end of the elastic piece 305 acts on the groove wall of the annular groove 3011, and the other end acts on the annular sealing top piece 304, for providing a force for the annular sealing top piece 304 to seal against the workpiece.

[0090] For example, as shown in Figure 5 The surface 301 at the bottom of the flexible sealing cover 300 is processed with an annular groove 3011, and the center line of the annular groove 3011 is concentric with the center axis of the bottom of the flexible sealing cover 300, ensuring that the annular sealing top piece 304 can uniformly contact the surface of the workpiece when sliding in the groove.

[0091] The annular sealing top piece 304 is made of rubber material and internally installed with a strip-shaped magnet piece, so that the elasticity of the rubber and the adsorption characteristics of the strip-shaped magnet piece can be combined. The outer diameter of the annular sealing top piece 304 is consistent with the shape and size of the annular groove 3011.

[0092] The spring is selected as the elastic member 305, and in the installed state, the spring is compressed to provide a certain elastic force. One end of the spring abuts against the groove wall of the annular groove 3011, and the other end abuts against the outer circumferential surface of the annular sealing top piece 304, so that the annular sealing top piece 304 is always subjected to a pressure towards the surface of the workpiece, to achieve a good sealing effect. In the annular groove 3011, a plurality of springs are uniformly distributed in the circumferential direction, to ensure that the annular sealing top piece 304 is uniformly stressed.

[0093] Considering that the flexible sealing cover 300 is a telescopic organ seal cover, and the surface 301 thereof is also a folded line structure surrounding a circle, the structure of the annular sealing top piece 304 also needs to be consistent with the surface 301, that is, a folded line structure surrounding a circle, to ensure the realization of the telescopic flexible sealing cover 300.

[0094] The annular sealing top piece 304 always maintains a sealing abutting force against the surface of the workpiece under the action of the elastic member 305. For iron workpieces, the annular sealing top piece 304 has a magnetic member inside, which can be adsorbed on the surface of the workpiece by magnetic force, to further enhance the sealing effect. The pressure provided by the elastic member 305 and the magnetic adsorption force jointly act to effectively prevent air leakage, to ensure that the flexible sealing cover 300 and the workpiece form a good sealed space, and to improve the accuracy of the weld seam air tightness detection.

[0095] When the flexible sealing cover 300 descends to contact the workpiece, if the surface of the workpiece is uneven, the annular sealing top piece 304 can slide in the annular groove 3011, and through the elastic deformation of the elastic member 305, it can be self-adaptively adjusted to contact the surface of the workpiece, to ensure the reliability of the sealing. At the same time, the rotating shaft 302 at the bottom of the flexible sealing cover 300 enables the flexible sealing cover 300 to be bent to fit the bent workpiece, and cooperates with the sealing effect of the annular sealing top piece 304, to adapt to the sealing requirements of workpieces of different shapes.

[0096] In some examples, as shown in Figure 7 The first swing body 110 and the second swing body 120 respectively have a first extension 111 and a second extension 121 extending upwards, and further include a second linear driving member 800, one end of the second linear driving member 800 being hinged to the first extension 111, and the other end being hinged to the second extension 121, for driving the first swing body 110 and the second swing body 120 to relatively rotate.

[0097] For example, the second linear drive 800 can be an electric push rod, which is connected to the first extension part 111 and the second extension part 121 in a hinged manner. When the electric push rod is extended or retracted, the included angle between the first swing body 110 and the second swing body 120 can be accurately changed. The control system sends a control signal to the second linear drive 800 according to the shape of the workpiece and the weld position information, so as to realize extension or retraction, so that the first swing body 110 and the second swing body 120 are accurately swung to a suitable angle, and better fit the surface of the bent workpiece, thereby providing support for accurate placement and good sealing of the flexible sealing cover 300.

[0098] The swinging of the first swing body 110 and the second swing body 120 is matched with the bending of the flexible sealing cover 300. When the first and second swing bodies adjust the angle to adapt to the shape of the workpiece, the rotating shaft 302 at the bottom of the flexible sealing cover 300 and the sealing extension parts 303 at the top and both sides are synchronously actuated, so that the flexible sealing cover 300 is tightly fitted to the workpiece as a whole. At the same time, the first moving body 100 and the second moving body 200 cooperatively complete the detection of welds at different positions through the relative movement of the first linear drive 730 and the adsorption and release of the suction cup.

[0099] In some examples, a controller is further included, and the lifting drive 500, the vacuum pump connected by the vacuum pipeline 400, the first linear drive 730, the first electromagnetic valve 740, the second electromagnetic valve 750 and the second linear drive 800 are all connected with the controller.

[0100] For example, the controller is a programmable logic controller (PLC), which can meet the control requirements of multiple devices, and is equipped with multiple input and output ports, which are respectively connected with the lifting drive 500, the vacuum pump connected by the vacuum pipeline 400, the first linear drive 730, the first electromagnetic valve 740, the second electromagnetic valve 750 and the second linear drive 800 through cables.

[0101] The lifting drive 500 is an electric push rod, and the control end of the motor thereof is connected with the output port of the PLC. The PLC controls the forward and reverse rotation of the electric push rod by sending different electric signals, so as to realize the lifting action of the flexible sealing cover 300. For example, when the flexible sealing cover 300 needs to be lowered, the PLC sends a forward current signal to the motor of the electric push rod, and the motor rotates to drive the push rod to extend; when the flexible sealing cover 300 needs to be raised, the PLC sends a reverse current signal.

[0102] The vacuum pipeline 400 can be connected with a vacuum pump, and the start, stop and air suction rate of the vacuum pump are controlled by the PLC. The PLC sends signals to the control circuit of the vacuum pump through the output port, so as to accurately control the vacuum pump. For example, after the flexible sealing cover 300 is sealed, the PLC sends a start signal to make the vacuum pump work, and when the vacuum degree in the sealed space reaches a preset value, the PLC sends a stop signal or a signal for adjusting the air suction rate.

[0103] The first linear drive 730 is an electric push rod, and its motor control end is connected to the output port of the PLC. The PLC sends control signals to the electric push rod motor according to the detection process and the workpiece position information, controls the speed, displacement and start-stop of the electric push rod, and realizes the relative movement of the first moving body 100 and the second moving body 200.

[0104] The first electromagnetic valve 740 and the second electromagnetic valve 750 are respectively installed on the first suction cup 710 and the second suction cup 720, and their control ends are connected to the output port of the PLC. The PLC controls the opening and closing of the electromagnetic valves by sending high and low level signals, thereby controlling the communication state of the first suction cup 710 and the second suction cup 720 with the vacuum pumping pipeline 400, and realizing the suction and release actions of the suction cup on the workpiece.

[0105] The second linear drive 800 is an electric push rod, and its control end is connected to the output port of the PLC. The PLC sends control signals to the electric push rod motor according to the workpiece shape and weld position information, adjusts the extension length of the electric push rod, thereby controls the included angle between the first swing body 110 and the second swing body 120, and makes the moving body better adapt to the workpiece shape.

[0106] The controller pre-stores the control program of the detection process. When the equipment starts, according to the related information of the workpiece to be detected, such as the workpiece shape, the weld position and the direction, etc. The PLC controls each component to work cooperatively according to the preset program logic according to these information. For example, first, control the second linear drive 800 to adjust the included angle of the first swing body 110 and the second swing body 120, so that the moving body is aligned with the starting position of the weld; then control the first linear drive 730 to move the first moving body 100 and the second moving body 200 to the appropriate position; then control the lifting drive 500 to make the flexible sealing cover 300 descend and fit with the workpiece; then control the first electromagnetic valve 740 and the second electromagnetic valve 750 to open the suction cup to adsorb the workpiece; finally, control the vacuum pump connected by the vacuum pumping pipeline 400 to carry out vacuum detection.

[0107] During the detection process, the running state of each component is fed back to the PLC in real time by the sensor. For example, the vacuum degree sensor feeds back the vacuum degree information in the sealed space to the PLC, the displacement sensor feeds back the displacement information of the first linear drive 730 and the second linear drive 800 to the PLC, and the pressure sensor detects the adsorption force of the suction cup and feeds back. The PLC adjusts the running parameters of each component in real time according to these feedback information. If the vacuum degree does not reach the preset value, the PLC controls the vacuum pump connected by the vacuum pumping pipeline 400 to continue working or adjusts the air exhaust rate; if the moving position of the first moving body 100 and the second moving body 200 deviates, the PLC controls the first linear drive 730 to make fine adjustment.

[0108] The controller realizes high automation of the detection process, reduces manual intervention, and improves detection efficiency and accuracy. Through precise control of each component, the detection process and parameters can be flexibly adjusted according to the characteristics and detection requirements of different workpieces, ensuring the reliability of the detection results.

[0109] In some examples, a leak detection liquid application head 900 is also included, which is arranged on one side of the flexible seal cover 300.

[0110] For example, as shown in Figures 1-4 The leak detection liquid application head 900 is in the shape of a cylinder as a whole, and is connected to one side of the flexible seal cover 300 through an adjustable angle joint arm. Inside the application head, a liquid channel is arranged, one end of which is connected to a leak detection liquid storage tank, and the leak detection liquid is delivered through a chemical corrosion resistant hose to ensure stable liquid delivery. Near the application end of the liquid channel 102, a micro nozzle is arranged, which adopts an atomizing design and can uniformly spray the leak detection liquid on the weld surface.

[0111] When the flexible seal cover 300 moves, the leak detection liquid application head 900 is adjusted by the joint arm to align with the weld position. At this time, the leak detection liquid is sprayed on the weld through the application head, and the vacuum detection in the flexible seal cover 300 is combined to improve the accuracy of the detection. For example, for a small leak, it may not be easy to detect during vacuum detection, but the leak detection liquid will produce obvious phenomena such as bubbling when it encounters a leak, making it easier to find the problem.

[0112] The leak detection liquid is usually a chemical solution sensitive to small leaks, with low surface tension, which can easily penetrate into small gaps. When the leak detection liquid is sprayed on the weld surface, if there is a leak in the weld, the pressure difference at the leak will cause the detection liquid to be sucked into the gap, and obvious phenomena such as bubbles, color changes, etc. will be formed at the leak point, thus directly showing the leak position.

[0113] Combining vacuum detection and leak detection liquid detection, the vacuum detection is used to make a macroscopic judgment of the overall sealing performance, and the vacuum degree change in the flexible seal cover 300 is used to determine whether there is a large leak. The leak detection liquid is used for microscopic detection of small leaks, which makes up for the deficiency of the vacuum detection that may miss small leak points. The two work together to comprehensively improve the accuracy of the weld air tightness detection.

[0114] It should be noted that the above examples are only used to illustrate the technical solutions of the present disclosure rather than limit the present disclosure. Although the present disclosure is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present disclosure can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present disclosure, and all should be covered in the scope of the claims of the present disclosure.

Claims

1. A weld quality inspection device for inspecting welds on a workpiece, characterized in that, include: The moving mechanism includes a first moving body (100) and a second moving body (200), both of which are used to attach to the surface of the workpiece and move on the workpiece. A flexible sealing cover (300) is provided in a way that allows it to move up and down relative to the first moving body (100) and the second moving body (200). The bottom has a contact surface (301) for contacting the workpiece. The contact surface (301) is annular. After the flexible sealing cover (300) moves down, it can be sealed to the workpiece and the airtightness of the weld can be detected. A vacuum line (400) is connected to the flexible sealing cover (300) and is used for vacuuming; A lifting drive (500) is provided on both the first moving body (100) and the second moving body (200). The lifting drive (500) is connected to the bottom inside the flexible sealing cover (300) and is used to drive the flexible sealing cover (300) to rise and fall. The first moving body (100) and the second moving body (200) each include a first swing body (110) and a second swing body (120). The first swing body (110) and the second swing body (120) are hinged together to make the first swing body (110) and the second swing body (120) fit against the bent workpiece.

2. The weld quality inspection device according to claim 1, characterized in that, The moving mechanism further includes a first linear drive (730), and the first moving body (100) and the second moving body (200) are movably connected through the first linear drive (730); Both the first moving body (100) and the second moving body (200) are provided with an attachment connector (700) for attaching to the surface of the workpiece. The moving mechanism also includes a control unit for controlling the attachment connector (700) to connect or disconnect from the surface of the workpiece.

3. The weld quality inspection device according to claim 2, characterized in that, The attachment connector (700) includes a first suction cup (710) and a second suction cup (720) respectively disposed on the first moving body (100) and the second moving body (200), and both the first suction cup (710) and the second suction cup (720) are connected to the vacuum pipeline (400); The control unit is a solenoid valve assembly, which is configured to cause the first suction cup (710) and the second suction cup (720) to alternately adhere and fix to the surface of the workpiece when the first moving body (100) and the second moving body (200) are moving.

4. The weld quality inspection device according to claim 3, characterized in that, The flexible sealing cover (300) includes two covers, the bottoms of the two covers are hinged by a pivot (302), and a sealing telescopic part (303) is provided between the two covers. The two covers can rotate to fit the outer surface of the bent workpiece, and the sealing telescopic part (303) can extend after the covers rotate.

5. A weld quality inspection device according to claim 4, characterized in that, Both the first swing body (110) and the second swing body (120) are provided with driven walking wheels (600); both the first swing body (110) and the second swing body (120) of the first moving body (100) are provided with the first suction cup (710), and both the first swing body (110) and the second swing body (120) of the second moving body (200) are provided with the second suction cup (720).

6. A weld quality inspection device according to claim 4, characterized in that, The bottom of the flexible sealing cover (300) has an annular groove (3011), and the flexible sealing cover (300) further includes: An annular sealing top (304) is slidably disposed in the annular groove (3011). The bottom of the annular sealing top (304) has the contact surface (301), and the annular sealing top (304) has a magnetic element inside so that the annular sealing top (304) can be magnetically adsorbed onto the iron workpiece. An elastic element (305) is provided, with one end acting on the groove wall of the annular groove (3011) and the other end acting on the annular sealing top (304), to provide a sealing force between the annular sealing top (304) and the workpiece.

7. A weld quality inspection device according to claim 5, characterized in that, The first oscillating body (110) and the second oscillating body (120) each have an upwardly extending first extension (111) and a second extension (121), and further include: The second linear drive (800) is hinged at one end to the first extension (111) and at the other end to the second extension (121), and is used to drive the first swing body (110) and the second swing body (120) to move relative to each other.

8. A weld quality inspection device according to claim 7, characterized in that, The solenoid valve assembly includes a first solenoid valve (740) disposed on the first suction cup (710) for controlling the on / off state of the first suction cup (710) and a second solenoid valve (750) disposed on the second suction cup (720) for controlling the on / off state of the second suction cup (720), and further includes: The controller is connected to the lifting drive (500), the first linear drive (730), the first solenoid valve (740), the second solenoid valve (750), and the second linear drive (800).

9. A weld quality inspection device according to any one of claims 1 to 8, characterized in that, It also includes a leak detection fluid coating head (900), which is disposed on one side of the flexible sealing cover (300).

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