Oil tank welding seam leak detection device and leak detection method

Abstract

The invention discloses an oil tank welding seam leak detection device and leak detection method, and relates to the technical field of oil tank manufacturing, the oil tank welding seam leak detection device comprises a rotating chassis used for placing a to-be-detected tank body, the rotating chassis is driven by a rotation control device to horizontally rotate, and a sealing gasket is arranged on the rotating chassis; the air blowing device comprises an air blowing nozzle; the downward pressing device comprises a lifting frame, and a rotary pressing plate is arranged on the lower side of the lifting frame; a liquid spraying device; the box body is inversely placed on the sealing gasket of the rotating chassis and is pressed by the pressing device, then the blowing nozzle injects high-pressure gas into the box body to form high pressure in the box body, a worker can visually inspect the flaw position of the welding seam of the box body in cooperation with the detection liquid on the welding seam, and the process is simple in operation, high in inspection efficiency and convenient to operate. Especially, inspection can be conducted in time after the box cover is welded to the box body, the situation that the defective box body becomes a defective product after the box cover is welded is avoided, and waste can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of oil tank manufacturing, and in particular to an oil tank weld leak detection device and a leak detection method. Background Art

[0002] During the manufacturing process of a mechanical fuel tank, multiple sheet materials are assembled and then welded using automated welding equipment. After welding, to ensure the tank's quality, the welds must be inspected manually or automatically for leaks. Current leak detection methods are inefficient and lack precision, hindering fuel tank production efficiency. This is especially true for semi-finished fuel tanks where the tank body is welded but the cover is not. If the welds are not inspected before being welded into the finished tank, the tank is likely to be defective and difficult to repair, resulting in waste. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a fuel tank weld leak detection device and a leak detection method.

[0004] According to the first embodiment of the present invention, the oil tank weld leak detection device includes: a rotating chassis for placing a box body to be detected, the box body opening is downward, the rotating chassis is driven to rotate horizontally by a rotating control device, and a sealing gasket is provided on the rotating chassis; a blowing device, the blowing device includes a blowing nozzle, the blowing nozzle extends upward from the rotating chassis, the blowing nozzle is connected to an external air source, and the blowing nozzle can inject high-pressure gas into the box body; a downward pressure device is located above the rotating chassis, the downward pressure device includes a lifting frame, the lifting frame is driven to move up and down by a lifting control device, a rotating pressure plate is provided on the lower side of the lifting frame, and the rotating pressure plate and the lifting frame are connected by a rotating pressure plate rotating shaft; a liquid spraying device is used to spray detection liquid onto the weld position of the box body.

[0005] According to some embodiments of the present invention, a base plate is further included, wherein a fixed guide ring is provided on the base plate, a rotating inner gear ring is mounted inside the fixed guide ring, the rotating inner gear ring is connected to the lower side of the rotating chassis, a driving gear is provided inside the rotating inner gear ring, the rotating inner gear ring and the driving gear are meshed with each other, and the rotation control device is connected to the driving gear via an output shaft.

[0006] According to some embodiments of the present invention, the rotating chassis has a central through hole in its center, the blowing nozzle extends upward through the central through hole, and a blowing nozzle sealing ring is provided on the central through hole.

[0007] According to some embodiments of the present invention, a sealing gasket positioning strip is provided on the rotating chassis, the sealing gasket positioning strip supports the side position of the sealing gasket, and a sealing gasket fixing piece is provided on the sealing gasket positioning strip, the sealing gasket fixing piece clamps the sealing gasket.

[0008] According to some embodiments of the present invention, the downward pressure device is fixed on the fixed frame, and the base plate is driven to move forward and backward through a translational movable device. The translational movable device includes a translation cylinder, a translation guide rail, and a translation slider. The translation cylinder is connected to the lower side of the fixed frame and the lower side of the base plate, the translation guide rail is connected to the fixed frame, the translation slider is connected to the lower side of the base plate, and the translation guide rail is slidably connected to the translation slider.

[0009] According to some embodiments of the present invention, a conveying robot and a conveying frame are further included, wherein the conveying frame is fixedly connected with a conveying transverse guide rail, a conveying transverse slider is slidably connected to the conveying transverse guide rail, a conveying transverse frame is fixedly connected with the conveying transverse slider, a conveying longitudinal guide rail is fixedly connected to the conveying longitudinal slider, a conveying longitudinal frame is fixedly connected with the conveying longitudinal slider, a conveying lifting slider is fixedly connected to the conveying longitudinal frame, a conveying lifting slider is slidably connected to the conveying lifting guide rail, and the conveying lifting guide rail is fixedly connected with the conveying lifting frame, and the conveying robot is connected to the lower side of the conveying lifting frame.

[0010] According to some embodiments of the present invention, a conveying robot is further included, which includes a robot bracket, a side gripper, and an upper gripper. The lower side of the robot bracket is fixedly connected to a gripper guide rail, and a gripper slider is slidably connected to the gripper guide rail. The side gripper is fixedly connected to the gripper slider, and the upper gripper is connected to the lower side of the robot bracket through an upper gripper telescopic rod.

[0011] According to some embodiments of the present invention, each side gripper is fixedly connected to a side gripper rack, an intermediate guide gear is provided on the lower side of the manipulator bracket, the intermediate guide gear is engaged with each side gripper rack, and a guide pressure wheel is also provided on the lower side of the manipulator bracket, the guide pressure wheel cooperates with the intermediate guide gear to clamp the side gripper rack, and the side gripper is driven to move by a side gripper cylinder.

[0012] The oil tank weld leak detection device according to the embodiment of the present invention has at least the following technical effects: the tank body is placed upside down on the sealing gasket of the rotating chassis, and the tank body is pressed down by the downward pressure device, and then the air nozzle injects high-pressure gas into the tank body to form high pressure inside the tank body. In conjunction with the detection liquid on the weld, the worker can visually check the position of the weld defect of the tank body. The above process is simple to operate and has high inspection efficiency. In particular, the inspection can be carried out in time after the tank cover is welded to the tank body, so as to avoid the defective tank body becoming a defective product after the tank cover is welded, which can reduce waste.

[0013] According to a second embodiment of the present invention, a leak detection method includes a fuel tank weld leak detection device according to the first embodiment of the present invention, wherein the leak detection step includes:

[0014] Step 1: Place the box on the rotating chassis, with the bottom wall of the box facing upward, the opening of the box facing downward, and the edge of the opening of the box aligned with the sealing gasket;

[0015] Step 2: The rotating pressing plate descends to press the bottom wall of the box;

[0016] Step 3: The liquid spraying device sprays the detection liquid toward the weld position of the box body;

[0017] Step 4: The blowing nozzle injects high-pressure gas into the box;

[0018] Step 5: Check the welds of the box for leaks.

[0019] According to some embodiments of the present invention, in step 3, the detection liquid sprayed by the liquid spraying device toward the weld position of the box body is soap solution or lye solution, and in step 5, the location where the bubbles are generated is marked.

[0020] The leak detection method according to the embodiment of the present invention has at least the following beneficial effects:

[0021] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0023] Figure 1 It is a perspective view of the fuel tank weld leak detection device of the present invention;

[0024] Figure 2 It is a three-dimensional diagram of a single detection station of the fuel tank weld leak detection device of the present invention;

[0025] Figure 3This is a three-dimensional diagram of a single detection station of the fuel tank weld leak detection device of the present invention from another angle;

[0026] Figure 4 It is a three-dimensional cross-sectional view of a single detection station of the fuel tank weld leak detection device of the present invention;

[0027] Figure 5 yes Figure 4 Enlarged view of area A in the middle;

[0028] Figure 6 It is a working schematic diagram of the leak detection method of the present invention;

[0029] Figure 7 is a perspective view of the downward pressing device of the present invention;

[0030] Figure 8 It is a three-dimensional diagram of the fixed frame and the translation movable device in the present invention;

[0031] Figure 9 It is a three-dimensional schematic diagram of the conveying robot in the present invention when it moves horizontally;

[0032] Figure 10 It is a three-dimensional schematic diagram of the conveying robot in the present invention when it moves longitudinally and lifts;

[0033] Figure 11 It is a three-dimensional diagram of the conveying robot in the present invention;

[0034] Figure 12 It is a three-dimensional diagram of the conveying robot in the present invention from another angle;

[0035] Figure 13 It is a three-dimensional diagram of the side gripper of the present invention.

[0036] Reference numerals:

[0037] Rotating chassis 100, sealing gasket 110, central through hole 120, blowing nozzle sealing ring 130, sealing gasket positioning strip 140, sealing gasket fixing part 150, blowing nozzle bearing 160; rotating control device 200, output shaft 201, fixed guide ring 210, guide inner wall surface 211, rotating inner gear ring 220, guide outer wall surface 221, driving gear 230; translation movable device 300, translation cylinder 310, translation guide rail 320, translation Shifting slider 330, bottom plate 340; blowing device 400, blowing nozzle 410, air source 420; pressing device 500, lifting frame 510, rotating pressure plate 520, rotating pressure plate shaft 521, extending pressure claw 522, lifting control device 530, lifting control guide piston rod 540; spraying device 600; fixed frame 700, fixed stand 710, fixed top frame 720, fixed bottom frame 730, worker pedal 731, grating 740, Inductive sensor 750, sensor extension rod 751, control chassis 760, controller 770; conveying robot 800, robot bracket 810, gripper guide rail 811, intermediate guide gear 812, guide pressure wheel 813, side gripper 820, gripper slider 821, side gripper rack 822, side gripper strip-shaped card plate 823, side gripper connecting rod 824, upper gripper 830, upper gripper telescopic rod 831, upper gripper guide bearing 83 2. Upper gripper buffer spring 833, upper gripper strip pressure plate 834, side gripper cylinder 840, side gripper cylinder telescopic rod 841, conveying frame 850, conveying transverse guide rail 851, conveying transverse slider 852, conveying transverse frame 853, conveying longitudinal guide rail 854, conveying lifting slider 855, conveying longitudinal slider 856, conveying longitudinal frame 857, conveying lifting guide rail 858, conveying lifting frame 859; box body 900, weld 910. DETAILED DESCRIPTION

[0038] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0039] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0040] In the description of the present invention, "a plurality" means more than two, and "greater than," "less than," "exceed," etc. are understood to exclude the number itself. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0041] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0042] Reference below Figure 1 and Figure 2 A fuel tank weld leak detection device according to an embodiment of the present invention is described.

[0043] like Figure 1 and Figure 2 As shown, the oil tank weld leak detection device according to an embodiment of the present invention includes a rotating chassis 100, an air blowing device 400, a pressing device 500 and a liquid spraying device 600.

[0044] The rotating chassis 100 is used to place the box 900 to be tested, the box 900 is opened downward, and the rotating chassis 100 is driven to rotate horizontally by the rotation control device 200. A sealing gasket 110 is provided on the rotating chassis 100; Figure 3 、 Figure 4 The blowing device 400 includes an air blowing nozzle 410, which extends upward from the rotating chassis 100. The air blowing nozzle 410 is connected to an external gas source 420, and the air blowing nozzle 410 can inject high-pressure gas into the box body 900; the pressing device 500 is located above the rotating chassis 100, and the pressing device 500 includes a lifting frame 510. The lifting frame 510 is driven to move up and down by a lifting control device 530. A rotating pressure plate 520 is provided on the lower side of the lifting frame 510, and the rotating pressure plate 520 is connected to the lifting frame 510 by a rotating pressure plate shaft 521; the liquid spraying device 600 is used to spray the detection liquid onto the weld position of the box body 900.

[0045] For example, Figure 1 and Figure 2 As shown, the rotating chassis 100 is used to place the box 900 to be tested, and the box 900 is opened downward, which is equivalent to the box 900 being placed upside down on the rotating chassis 100. The rotating chassis 100 is driven to rotate horizontally by the rotation control device 200, and the box 900 can also rotate with the rotating chassis 100. A sealing gasket 110 is provided on the rotating chassis 100, and the opening position of the box 900 is aligned with the sealing gasket 110, which is equivalent to the sealing gasket 110 having a sealing effect on the opening position of the box 900. Figure 3 、 Figure 4The blowing device 400 includes a blowing nozzle 410, which extends upward from the rotating chassis 100, which is equivalent to extending into the inner cavity of the box body 900. The blowing nozzle 410 is connected to an external gas source 420, and the blowing nozzle 410 can inject high-pressure gas into the box body 900. The pressing device 500 is located above the rotating chassis 100 and is used to press down the inverted box body 900. The pressing device 500 includes a lifting frame 510, and the lifting frame 510 is driven to move up and down by a lifting control device 530. A rotating pressure plate 520 is provided on the lower side of the lifting frame 510, and the rotating pressure plate 520 can be lifted and lowered together with the lifting frame 510. The rotating pressure plate 520 is connected to the lifting frame 510 by a rotating pressure plate rotating shaft 521, so that the rotating pressure plate 520 can rotate around the rotating pressure plate rotating shaft 521. The liquid spraying device 600 is used to spray the inspection liquid toward the weld position of the box body 900 , and use the inspection liquid to inspect the weld 910 of the box body 900 .

[0046] In actual work, refer to Figure 2 、 Figure 3 , the box body 900 is inverted with the opening facing downwards, and the inverted box body 900 is placed on the rotating chassis 100, and the opening of the box body 900 is aligned with the sealing gasket 110. Then the lifting frame 510 of the pressing device 500 is lowered so that the rotating pressing plate 520 presses the upper side of the inverted box body 900, that is, the bottom wall of the box body 900. Figure 4 、 Figure 5 Then the rotation control device 200 drives the rotating chassis 100 to rotate, so that the box body 900 can rotate to adjust the direction, and cooperate with the liquid spraying device 600 to spray the detection liquid to the weld position of the box body 900, so that the welds 910 around the box body 900 can be sprayed with the detection liquid. Figure 6 Then, the gas source 420 supplies air to the blowing nozzle 410, which injects high-pressure gas into the box body 900. Combined with the sealing effect of the sealing gasket 110, the box body 900 is subjected to high pressure. If there is a defect in the weld of the box body 900, the high-pressure gas in the box body 900 will leak out from the weld defect and be displayed by the detection liquid, allowing workers to visually check the location of the weld defect in the box body 900.

[0047] The above process is simple to operate and can quickly detect the location of weld defects in the box body 900. In particular, the inspection can be carried out in time after the box cover is welded to the box body 900, avoiding the defective box body 900 becoming a defective product after the box cover is welded, which is difficult to repair or remedy, thereby reducing waste.

[0048] In some embodiments of the present invention, reference Figure 4 、 Figure 5The leak detection device of the present invention also includes a base plate 340, on which a fixed guide ring 210 is provided. That is, the fixed guide ring 210 is fixedly connected to the base plate 340 and is relatively immobile. A rotating inner ring gear 220 is mounted within the fixed guide ring 210. The rotating inner ring gear 220 is connected to the lower side of the rotating chassis 100. That is, the rotating inner ring gear 220 can rotate within the fixed guide ring 210, thereby driving the rotating chassis 100 to rotate. A driving gear 230 is provided within the rotating inner ring gear 220. The rotating inner ring gear 220 and the driving gear 230 are engaged with each other. The rotation control device 200 is connected to the driving gear 230 via the output shaft 201. The rotation control device 200 can drive the driving gear 230 on the output shaft 201 to rotate, driving the rotating inner ring gear 220 to rotate, and thereby controlling the rotation of the rotating chassis 100 and the box 900 on the rotating chassis 100. This rotation method not only ensures that the box 900 rotates sufficiently smoothly, but also better adapts to the characteristics of the oil tank. Moreover, this rotating device design can leave enough space in the center of the rotating chassis 100 for the blowing device 400 to work, which is convenient for the arrangement of the blowing device 400.

[0049] In some embodiments of the present invention, the rotating chassis 100 has a central through-hole 120, through which the air blowing nozzle 410 extends upward. A nozzle sealing ring 130 is provided on the central through-hole 120 to seal the gap between the air blowing nozzle 410 and the central through-hole 120, thereby preventing high-pressure air within the housing 900 from leaking through the gap between the air blowing nozzle 410 and the central through-hole 120 and affecting the inspection effect.

[0050] In some embodiments of the present invention, a gasket positioning strip 140 is provided on the rotating chassis 100. The gasket positioning strip 140 supports the side of the gasket 110. A gasket fixing member 150 is provided on the gasket positioning strip 140. The gasket fixing member 150 engages the gasket 110, thereby securing the gasket 110 on the rotating chassis 100. When the gasket 110 needs to be replaced, the gasket fixing member 150 can be removed, thereby allowing the gasket 110 to be removed.

[0051] In some specific embodiments of the present invention, a blowing nozzle bearing 160 is provided between the central through hole 120 and the blowing nozzle 410, which not only can block the gap between the blowing nozzle 410 and the central through hole 120, but also when the rotating chassis 100 rotates, the blowing nozzle 410 can be supported by the blowing nozzle bearing 160 without rotating and will not be affected by the rotation of the rotating chassis 100.

[0052] In some specific embodiments of the present invention, the blowing nozzle sealing ring 130 covers the upper side of the blowing nozzle bearing 160 and the upper side of the gap between the blowing nozzle bearing 160 and the central through hole 120 to ensure a sealing effect.

[0053] In some specific embodiments of the present invention, the inner wall of the fixed guide ring 210 has a guide inner wall surface 211, and the outer wall of the rotating inner gear ring 220 has a guide outer wall surface 221. The guide inner wall surface 211 and the guide outer wall surface 221 cooperate to guide the rotation of the rotating inner gear ring 220, so that the rotating inner gear ring 220 rotates more smoothly.

[0054] In some specific embodiments of the present invention, the guiding inner wall surface 211 and the guiding outer wall surface 221 may be vertical cylindrical or inverted frustum-shaped annular surfaces.

[0055] In some embodiments of the present invention, reference Figure 7 The pressing device 500 is fixed to the fixed frame 700, and the bottom plate 340 is driven to translate forward and backward by the movable translation device 300. The movable translation device 300 includes a translation cylinder 310, a translation guide rail 320, and a translation slider 330. The translation cylinder 310 is connected to the lower side of the fixed frame 700 and the lower side of the bottom plate 340. The translation guide rail 320 is connected to the fixed frame 700, and the translation slider 330 is connected to the lower side of the bottom plate 340. The translation guide rail 320 and the translation slider 330 are in sliding contact. In this way, the translation cylinder 310 can drive the bottom plate 340 to translate forward and backward, while the translation guide rail 320 guides the translation slider 330 on the lower side of the bottom plate 340. In this way, the box 900 located on the rotating chassis 100 can be moved from the rear of the pressing device 500 to a position directly below the pressing device 500, ensuring that the rotating pressing plate 520 can press the box 900 after it is lowered.

[0056] In some specific embodiments of the present invention, a protruding pressing claw 522 is provided on the outer edge of the rotating pressing plate 520 so that the rotating pressing plate 520 can press the box body 900 more stably and reliably.

[0057] In some specific embodiments of the present invention, a lifting control guide piston rod 540 is provided between the fixing frame 700 and the lifting frame 510 , so that when the lifting control device 530 controls the lifting of the lifting frame 510 , the lifting control guide piston rod 540 can guide the lifting of the lifting frame 510 .

[0058] In some specific embodiments of the present invention, the lifting control guide piston rods 540 are distributed at the four corner positions of the lifting frame 510 .

[0059] In some specific embodiments of the present invention, referring to Figure 8 The fixed frame 700 includes, from top to bottom, a fixed vertical frame 710, a fixed top frame 720, and a fixed bottom frame 730. The downward pressing device 500 is connected to the fixed vertical frame 710, and the translational movable device 300 is connected to the fixed bottom frame 730. The fixed vertical frames 710 are located on both sides, and the space between the fixed vertical frames 710 serves as a space for the rotating chassis 100 to move and the box body 900 to be inspected.

[0060] In some specific embodiments of the present invention, a light barrier 740 is provided on the fixed stand 710 to detect whether a worker has entered the box 900 to inspect the working range and avoid danger.

[0061] In some specific embodiments of the present invention, induction sensors 750 are provided on the left and right sides of the lower side of the fixed stand 710 as the first group of induction sensors, and induction sensors 750 are also provided on the left and right sides of the lifting stand 510 as the second group of induction sensors. The first group of induction sensors and the second group of induction sensors are used together to detect whether the box 900 enters the inspection working range.

[0062] In some specific embodiments of the present invention, the fixed stand 710 and the lifting stand 510 fix the inductive sensor 750 via the sensor extension rod 751, so that the inductive sensor 750 can be extended to facilitate detection.

[0063] In some specific embodiments of the present invention, a control chassis 760 and a controller 770 are provided on the fixed stand 710 .

[0064] In some specific embodiments of the present invention, a worker pedal 731 is provided on the fixed base frame 730 , and a worker can work on the worker pedal 731 .

[0065] In some embodiments of the present invention, reference Figure 9 、 Figure 10 The leak detection device of the present invention further includes a conveying robot 800 and a conveying rack 850 . The conveying robot 800 can grab the box 900 and move on the conveying rack 850 .

[0066] The conveying frame 850 is fixedly connected to a conveying transverse guide rail 851, and a conveying transverse slider 852 is slidably connected to the conveying transverse guide rail 851. The conveying transverse slider 852 is fixedly connected to a conveying transverse frame 853. The conveying transverse frame 853 can guide the conveying transverse slider 852 to move horizontally along the left and right directions through the conveying transverse guide rail 851.

[0067] The conveying transverse frame 853 is fixedly connected to a conveying longitudinal guide rail 854, and the conveying longitudinal slide 856 is slidably connected to the conveying longitudinal guide rail 854. The conveying longitudinal slide 856 is fixedly connected to a conveying longitudinal frame 857. The conveying longitudinal frame 857 can guide the conveying longitudinal slide 856 through the conveying longitudinal guide rail 854 to guide the longitudinal movement along the front and rear directions.

[0068] The conveying lifting slider 855 is fixedly connected to the conveying longitudinal frame 857, and the conveying lifting guide rail 858 is slidably connected to the conveying lifting slider 855. The conveying lifting guide rail 858 is fixedly connected to the conveying lifting frame 859. The conveying robot 800 is connected to the lower side of the conveying lifting frame 859. The conveying lifting frame 859 can guide the conveying lifting slider 855 through the conveying lifting guide rail 858 to guide the lifting movement along the upper and lower directions.

[0069] In this way, the conveying robot 800 can move horizontally, vertically, and vertically after grabbing the box 900, and deliver the box 900 from the input side to the rotating chassis 100 on the station. The box 900 that has completed the inspection work is grabbed by the conveying robot 800 and delivered to the output side.

[0070] In some embodiments of the present invention, reference Figure 11 、 Figure 12 The leak detection device of the present invention also includes a conveying robot 800, which includes a robot bracket 810, a side clamping hand 820, and an upper clamping hand 830. That is, the conveying robot 800 grabs the box 900 through the side clamping hand 820 and the upper clamping hand 830 on the robot bracket 810.

[0071] The lower side of the manipulator bracket 810 is fixedly connected to a gripping guide rail 811, and a gripping slider 821 is slidably connected to the gripping guide rail 811. Figure 13 The side grippers 820 are fixedly connected to the gripper slider 821. The side grippers 820 can be guided by the gripper slider 821 through the gripper guide rail 811 to guide the translational movement, and are used to grip the left and right sides of the upper side of the inverted box 900. The upper gripper 830 is connected to the lower side of the manipulator bracket 810 via the upper gripper telescopic rod 831, so that the upper gripper 830 can support the upper side of the inverted box 900. This ensures that the transfer manipulator 800 is more stable and reliable when grasping the inverted box 900.

[0072] In some specific embodiments of the present invention, the side clamping cylinder telescopic rod 841 of the side clamping cylinder 840 is telescopic and movable, and the side clamping cylinder telescopic rod 841 is connected to the side clamping strip clamping plate 823 on the upper side of the side clamping hand 820, so that the side clamping cylinder 840 can drive the side clamping hand 820 to move.

[0073] In some specific embodiments of the present invention, a side gripper strip-shaped clamping plate 823 is provided on the lower side of the side gripper 820 , and the side gripper 820 clamps the box body 900 through the side gripper strip-shaped clamping plate 823 .

[0074] In some embodiments of the present invention, reference Figure 12 、 Figure 13, each side gripper 820 is fixedly connected to a side gripper rack 822, and an intermediate guide gear 812 is provided on the lower side of the manipulator bracket 810, and the intermediate guide gear 812 is engaged with each side gripper rack 822. A guide pressure wheel 813 is also provided on the lower side of the manipulator bracket 810, and the guide pressure wheel 813 cooperates with the intermediate guide gear 812 to clamp the side gripper rack 822. The side grippers 820 are driven to move by the side gripper cylinder 840. When the side gripper cylinder 840 drives the side gripper 820 on one side, the side gripper rack 822 of the side gripper 820 translates to drive the intermediate guide gear 812 to rotate, and then drives the side gripper rack 822 on the other side to translate. In this way, it is equivalent to only needing one side gripper cylinder 840 to simultaneously drive the side grippers 820 on both sides to move synchronously to complete the clamping work.

[0075] In some specific embodiments of the present invention, an upper gripper guide bearing 832 is provided between the upper gripper telescopic rod 831 of the upper gripper 830 and the manipulator bracket 810. The upper gripper guide bearing 832 can guide the upper gripper telescopic rod 831 to rise and fall, thereby making the upper gripper 830 rise and fall more smoothly.

[0076] In some specific embodiments of the present invention, an upper gripper buffer spring 833 is provided between the upper gripper telescopic rod 831 of the upper gripper 830 and the manipulator bracket 810. The upper gripper buffer spring 833 applies a downward thrust to the upper gripper telescopic rod 831, so that the upper gripper 830 can play a buffering role when pressing the box body 900, thereby protecting the box body 900 and enabling the upper gripper 830 to better fix the box body 900.

[0077] In some specific embodiments of the present invention, an upper clamping hand strip-shaped pressing plate 834 is provided on the lower side of the upper clamping hand 830 , which is conducive to fixing the box body 900 more stably.

[0078] The leak detection method according to the second embodiment of the present invention includes the oil tank weld leak detection device according to the first embodiment of the present invention. Figure 6 , the leak detection steps of the present invention include:

[0079] Step 1: Place the box 900 on the rotating chassis 100 with the bottom wall of the box 900 facing upwards, the opening of the box 900 facing downwards, and the edge of the opening of the box 900 aligned with the sealing gasket 110;

[0080] Step 2: Rotate the pressing plate 520 downward to press the bottom wall of the box body 900;

[0081] Step 3: The liquid spraying device 600 sprays the testing liquid toward the weld position of the box body 900;

[0082] Step 4: The blowing nozzle 410 injects high-pressure gas into the box 900;

[0083] Step 5: Check the welds of the box body 900 for leaks.

[0084] For example, in step 1, the box body 900 is placed on the rotating chassis 100, with the bottom wall of the box body 900 facing upward and the opening of the box body 900 facing downward. The edge of the opening of the box body 900 is aligned with the sealing gasket 110 to ensure that the sealing gasket 110 can seal the opening of the box body 900; in step 2, the rotating pressing plate 520 is lowered to press the bottom wall of the box body 900 to ensure that the opening of the box body 900 is close to the sealing gasket 110. The rotating pressing plate 520 can rotate in conjunction with the rotating chassis 100 to facilitate the adjustment of the angle of the box body 900; in step 3, the liquid spraying device 60 0. Spray the detection liquid onto the weld position of the box body 900. The box body 900 is rotated to adjust the angle to ensure that the detection liquid can be sprayed on all weld positions; Step 4. The air nozzle 410 injects high-pressure gas into the box body 900. The high-pressure gas is blocked by the sealing gasket 110 at the opening position of the box body 900 and can only remain in the box body 900 or leak out from the weld defect position; Step 5. Check whether there is any leakage at the weld position of the box body 900. The box body 900 is rotated to adjust the angle to facilitate workers to detect the weld positions.

[0085] The above process is simple to operate and can quickly detect the location of weld defects in the box body 900. In particular, the inspection can be carried out in time after the box cover is welded to the box body 900, avoiding the defective box body 900 becoming a defective product after the box cover is welded, which is difficult to repair or remedy, thereby reducing waste.

[0086] In some embodiments of the present invention, in step 3, the liquid spraying device 600 sprays a soap solution or a lye solution as the detection liquid toward the weld position of the box body 900. In step 5, the location where the bubbles are generated is marked, so that the weld defect location of the box body 900 can be intuitively displayed.

[0087] According to the leak detection method of the embodiment of the present invention, by adopting the above-mentioned oil tank weld leak detection device, the space occupied by the leak detection station is reduced, the inspection process is simplified, and production efficiency is improved.

[0088] Other structures and operations of the leak detection method according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0089] Reference below Figure 1-Figure 4 The fuel tank weld leak detection device according to an embodiment of the present invention will be described in detail with reference to a specific embodiment. It should be understood that the following description is merely an illustrative description and does not specifically limit the invention.

[0090] like Figure 1-Figure 4As shown, the fuel tank weld leak detection device according to an embodiment of the present invention has three workstations, each of which includes a rotating chassis 100, an air blowing device 400, a downward pressure device 500, and a liquid spraying device 600, and is used to inspect whether the weld 910 on the tank body 900 is qualified. The front side has one workstation as the first workstation, and the rear side has two workstations as the second and third workstations.

[0091] Each workstation has a fixed frame 700, which includes a fixed vertical frame 710, a fixed top frame 720, a fixed bottom frame 730, a grating 740, an induction sensor 750, a control chassis 760, and a controller 770.

[0092] The rotating chassis 100 includes a sealing gasket 110, a central through-hole 120, an air blowing nozzle sealing ring 130, a sealing gasket positioning strip 140, a sealing gasket fixing member 150, and an air blowing nozzle bearing 160. The rotation control device 200 includes an output shaft 201, a fixed guide ring 210, a guide inner wall surface 211, a rotating inner gear ring 220, a guide outer wall surface 221, and a drive gear 230. The translational movable device 300 includes a translation cylinder 310, a translation guide rail 320, a translation slider 330, and a base plate 340. The air blowing device 400 includes an air blowing nozzle 410 and an air source 420. The downward pressing device 500 includes a lifting frame 510, a rotating pressure plate 520, a rotating pressure plate shaft 521, and a lifting control device 530. The liquid spraying device 600 is used to spray the inspection liquid onto the weld position of the box body 900.

[0093] The conveying robot 800 includes a robot bracket 810, a gripper guide rail 811, an intermediate guide gear 812, a guide pressure wheel 813, a side gripper 820, a gripper slider 821, a side gripper rack 822, a side gripper strip-shaped card plate 823, a side gripper connecting push rod 824, an upper gripper 830, an upper gripper telescopic rod 831, an upper gripper guide bearing 832, an upper gripper buffer spring 833, an upper gripper strip-shaped pressure plate 834, a side gripper cylinder 840, a side gripper cylinder telescopic rod 841, and a conveying frame 850. The conveying frame 850 is provided with a conveying transverse guide rail 851, a conveying transverse slider 852, a conveying transverse frame 853, a conveying longitudinal guide rail 854, a conveying longitudinal slider 856, a conveying longitudinal frame 857, a conveying lifting guide rail 858, a conveying lifting frame 859,

[0094] In some embodiments of the present invention, the leak detection step includes:

[0095] Step a: The transfer robot 800 places the input box 900 upside down on the rotating chassis 100 of the workstation, with the bottom wall of the box 900 facing upward, the opening of the box 900 facing downward, and the edge of the opening of the box 900 aligned with the sealing gasket 110;

[0096] Step b: The translation movable device 300 controls the rotating chassis 100 to translate to a position directly below the rotating pressure plate 520;

[0097] Step c: Rotate the pressing plate 520 downward to press the bottom wall of the box body 900;

[0098] Step d: The rotating chassis 100 rotates, and the worker uses the liquid spraying device 600 to spray the testing liquid onto the weld positions around the box;

[0099] Step d: The blowing nozzle 410 injects high-pressure gas into the box;

[0100] Step e: Check the welds of the box 900 for leaks and mark any weld defects.

[0101] Step f: After the inspection is completed, the high-pressure air in the box 900 is released;

[0102] Step g: the rotating pressing plate 520 is lifted up and no longer presses the box 900, and the translation movable device 300 controls the rotating chassis 100 to translate out of the working position;

[0103] Step h: The conveying robot 800 grabs the box 900 and sends it to the output side for subsequent processing.

[0104] The fuel tank weld leak detection device according to an embodiment of the present invention can achieve at least the following effects through such a configuration: the tank body 900 is placed upside down on the sealing gasket 110 of the rotating chassis 100, and the tank body 900 is pressed down by the pressing device 500. Then, the air nozzle 410 injects high-pressure gas into the tank body 900, thereby generating a high pressure inside the tank body 900. If there is a defect in the weld of the tank body 900, the high-pressure gas in the tank body 900 can leak out from the weld defect location of the tank body 900 and be displayed by the detection liquid, allowing workers to visually check the location of the weld defect of the tank body 900. The above process is simple to operate and can quickly detect the location of the weld defect of the tank body 900. In particular, the inspection can be carried out promptly after the tank cover is welded to the tank body 900, preventing the defective tank body 900 from becoming a defective product after the tank cover is welded, which is difficult to repair or remedy, thereby reducing waste.

[0105] Throughout this specification, references to the terms "some embodiments" or "it is contemplated that" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0106] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A fuel tank weld leak detection device, characterized in that: include: A rotating chassis (100) is used to place a box (900) to be tested, the box (900) is opened downward, the rotating chassis (100) is driven to rotate horizontally by a rotation control device (200), and a sealing gasket (110) is provided on the rotating chassis (100); A blowing device (400), the blowing device (400) comprising a blowing nozzle (410), the blowing nozzle (410) extending upward from the rotating chassis (100), the blowing nozzle (410) being connected to an external gas source (420), and the blowing nozzle (410) being capable of injecting high-pressure gas into the box body (900); A pressing device (500) is located above the rotating chassis (100). The pressing device (500) comprises a lifting frame (510). The lifting frame (510) is driven to move upward and downward by a lifting control device (530). A rotating pressing plate (520) is arranged at the lower side of the lifting frame (510). The rotating pressing plate (520) is connected to the lifting frame (510) via a rotating pressing plate rotating shaft (521). The liquid spraying device (600) is used to spray the detection liquid toward the welding seam position of the box body (900).

2. The fuel tank weld leak detection device according to claim 1, characterized in that: The invention also includes a base plate (340), wherein a fixed guide ring (210) is arranged on the base plate (340), wherein a rotating inner gear ring (220) is installed inside the fixed guide ring (210), wherein the rotating inner gear ring (220) is connected to the lower side of the rotating chassis (100), wherein a driving gear (230) is arranged inside the rotating inner gear ring (220), wherein the rotating inner gear ring (220) and the driving gear (230) are meshed with each other, and wherein the rotating control device (200) is connected to the driving gear (230) via an output shaft (201).

3. The fuel tank weld leak detection device according to claim 1 or 2, characterized in that: The rotating chassis (100) has a central through hole (120) at its center, the air blowing nozzle (410) passes through the central through hole (120) and protrudes upwards, and a air blowing nozzle sealing ring (130) is provided on the central through hole (120).

4. The fuel tank weld leak detection device according to claim 1, characterized in that: The rotating chassis (100) is provided with a sealing gasket positioning strip (140), the sealing gasket positioning strip (140) presses against the side edge of the sealing gasket (110), and the sealing gasket fixing piece (150) is provided on the sealing gasket positioning strip (140), the sealing gasket fixing piece (150) clamps the sealing gasket (110).

5. The fuel tank weld leak detection device according to claim 2, characterized in that: The pressing device (500) is fixed on the fixed frame (700), and the bottom plate (340) is driven to move forward and backward by the translational movable device (300). The translational movable device (300) comprises a translation cylinder (310), a translation guide rail (320), and a translation slider (330). The translation cylinder (310) is connected to the lower side of the fixed frame (700) and the lower side of the bottom plate (340), the translation guide rail (320) is connected to the fixed frame (700), the translation slider (330) is connected to the lower side of the bottom plate (340), and the translation guide rail (320) is in sliding connection with the translation slider (330).

6. The fuel tank weld leak detection device according to claim 1, characterized in that: The invention also comprises a conveying robot (800) and a conveying frame (850), wherein the conveying frame (850) is fixedly connected with a conveying transverse guide rail (851), the conveying transverse guide rail (851) is slidably connected with a conveying transverse slider (852), the conveying transverse slider (852) is fixedly connected with a conveying transverse frame (853), the conveying transverse frame (853) is fixedly connected with a conveying longitudinal guide rail (854), the conveying longitudinal guide rail (854) is slidably connected with a conveying longitudinal slider (856), the conveying longitudinal slider (856) is fixedly connected with a conveying longitudinal frame (857), the conveying longitudinal frame (857) is fixedly connected with a conveying lifting slider (855), the conveying lifting slider (855) is slidably connected with a conveying lifting guide rail (858), the conveying lifting guide rail (858) is fixedly connected with a conveying lifting frame (859), and the conveying robot (800) is connected to the lower side of the conveying lifting frame (859).

7. The fuel tank weld leak detection device according to claim 1, characterized in that: It also includes a conveying robot (800), which includes a robot support (810), a side gripper (820), and an upper gripper (830). The lower side of the robot support (810) is fixedly connected to a gripper guide rail (811), and a gripper slider (821) is slidably connected to the gripper guide rail (811). The side gripper (820) is fixedly connected to the gripper slider (821), and the upper gripper (830) is connected to the lower side of the robot support (810) via an upper gripper telescopic rod (831).

8. The fuel tank weld leak detection device according to claim 7, characterized in that: Each of the side grippers (820) is fixedly connected with a side gripper rack (822); an intermediate guide gear (812) is provided on the lower side of the manipulator support (810); the intermediate guide gear (812) is meshed with each of the side gripper racks (822); a guide pressure wheel (813) is also provided on the lower side of the manipulator support (810); the guide pressure wheel (813) cooperates with the intermediate guide gear (812) to clamp the side gripper rack (822); the side grippers (820) are driven to move by the side gripper cylinder (840).

9. A leak detection method, characterized in that: Using the oil tank weld leak detection device, the leak detection steps include: Step 1: placing the box (900) on the rotating chassis (100), with the bottom wall of the box (900) facing upwards, the opening of the box (900) facing downwards, and the edge of the opening of the box (900) aligned with the sealing gasket (110); Step 2: the rotating pressing plate (520) descends to press the bottom wall of the box body (900); Step 3: the liquid spraying device (600) sprays the detection liquid toward the weld position of the box body (900); Step 4: the blowing nozzle (410) injects high-pressure gas into the box (900); Step 5: Check whether there is leakage at the welding position of the box (900).

10. The leak detection method according to claim 9, characterized in that: In the step 3, the liquid spraying device (600) sprays a soap solution or a lye solution as the testing liquid toward the weld position of the box body (900), and in the step 5, the location where the bubbles are generated is marked.

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