A storage tank floating floor weld detection device

Abstract

The application provides a storage tank floating ship bottom plate weld joint detection device, belonging to the technical field of butt joint weld joint detection. The storage tank floating ship bottom plate weld joint detection device comprises a detection vehicle body. The detection vehicle body can move along the storage tank floating ship bottom plate weld joint through moving wheels. The bottom of the detection vehicle body is provided with a hollow vacuum observation cavity. The top of the detection vehicle body is provided with a vacuum pump. The air inlet hole of the vacuum pump is connected with the vacuum observation cavity through the vacuum pump. A bubble detection device and a soap water spraying device are installed in the vacuum observation cavity. The soap water spraying device is used for applying soap water on the weld joint to generate weld joint leakage bubbles. A reusable sealing device is installed at the bottom of the vacuum observation cavity. The vacuum pump is electrically connected with a control center and a power supply. The application can solve the problem that the device cannot be sealed due to uneven bottom plate, resulting in inaccurate detection results.

Description

Technical Field

[0001] This invention belongs to the field of butt weld inspection technology, and more specifically, relates to an inspection device for the bottom plate weld of a storage tank floating vessel. Background Technology

[0002] Currently, the domestic and international markets have a very high demand for crude oil. Crude oil storage tanks are primarily external floating roof tanks, leading to a growing demand for these tanks. The floating roof of the tank controls the evaporation of crude oil. There are welded connections between the tank bottom plate and the tank wall. The floating roof bottom plate refers to the gap between the bottom plate and the bottom of the tank, allowing liquid to flow and preventing the tank bottom from contacting the ground. This reduces bottom plate corrosion and extends the tank's lifespan. The quality of the bottom plate welds is a crucial factor in tank safety. Defects such as cracks and porosity in the bottom plate welds can easily lead to accidents and pose significant safety risks. Therefore, regular inspections of the bottom plate welds can promptly detect weld corrosion, allowing for the development of appropriate maintenance and repair plans and extending the tank's service life.

[0003] Chinese invention patent (application number: CN201 310477322.0) with publication number CN103499421B discloses a continuous large storage tank bottom plate weld vacuum inspection instrument, characterized by: a display, camera, miniature vacuum pump, steering wheels, load-bearing wheels, baffles, and soapy water brush on the continuous large storage tank bottom plate weld vacuum inspection instrument. This technical solution allows for the automatic application of soapy water to the weld during weld vacuum inspection. The inspector pushes the continuous large storage tank bottom plate weld vacuum inspection instrument, which has a vacuum level of -40KPa or higher, slowly along the weld to perform vacuum inspection.

[0004] The above invention provides an inspection device using a negative pressure vacuum detection method. Since the base plate may deform and wear during use, the surface of the base plate is not very flat. A simple sealing strip cannot form a sealed space inside the device. At this time, the device cannot achieve internal vacuum. Soap water will not produce bubbles at the weld leak points, resulting in inaccurate test results. Summary of the Invention

[0005] In view of this, the present invention provides a device for inspecting weld seams on the bottom plate of a floating storage tank, which can solve the problem that uneven bottom plate can cause the device to be unable to be sealed, resulting in inaccurate test results.

[0006] This invention is implemented as follows:

[0007] This invention provides a device for inspecting weld seams on the bottom plate of a floating storage tank, comprising an inspection vehicle body capable of moving along the weld seams on the bottom plate of the floating storage tank via wheels. The bottom of the inspection vehicle body has a hollow vacuum observation chamber, and the top of the inspection vehicle body has a vacuum pump. The suction port of the vacuum pump is connected to the vacuum observation chamber. A bubble detection device and a soap water spraying device are installed inside the vacuum observation chamber. The soap water spraying device is used to apply soap water to the weld seam to generate bubbles that cause leaks. A reusable sealing device is installed at the bottom of the vacuum observation chamber. The vacuum pump is electrically connected to a control center and a power source.

[0008] Based on the above technical solution, the device for detecting weld seams on the bottom plate of a floating storage tank of the present invention can be further improved as follows:

[0009] The sealing device includes a heat-deformable sealing cover and an electric heating plate. The sealing cover includes a deformable end and a fixed end. The outer diameter of the deformable end is larger than the outer diameter of the vehicle body. The deformable end can wrap around the lower edge of the vehicle body. The bottom of the deformable end is parallel to the bottom plate. The fixed end is connected to the top of the deformable end. The inner wall of the fixed end is tightly fitted with the bottom outer wall of the vehicle body. The fixed end is fixedly connected to a first electric slider. The bottom of the outer wall of the vehicle body has a slide rail perpendicular to the bottom plate. The first electric slider is slidably connected to the slide rail.

[0010] The bottom of the electric heating plate is the same size and shape as the top surface of the deformed end. The top of the electric heating plate is fixedly connected to one end of the L-shaped connecting arm, and the other end of the connecting arm is fixedly connected to the second electric slider. The second electric slider is slidably connected to the slide rail. The first electric slider, the second electric slider, the electric heating plate, and the control center and power supply are electrically connected.

[0011] The beneficial effects of adopting the above-mentioned improved scheme are as follows: by setting a sealing cover that can move up and down with the first electric slider, the sealing cover is heated and deformed when it is in contact with the base plate, so that it fits the base plate and forms a sealed space in the vacuum observation chamber. When the vacuum pump is working, it ensures that a vacuum can be formed in the vacuum observation chamber, which facilitates vacuum detection of the base plate weld within the vacuum observation chamber range and avoids inaccurate judgment of weld leaks caused by air leakage during detection.

[0012] The soap water spraying device includes a storage tank, a spray pipe, and a pump. The storage tank is installed inside the body of the testing vehicle. The storage tank has an outlet, and the spray pipe is connected to the outlet via the pump. Multiple downward-facing nozzles are connected to the spray pipe.

[0013] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting up a soap water spraying mechanism, multiple nozzles can evenly spray soap liquid onto the weld seam of the base plate, avoiding omissions and affecting the inspection results.

[0014] Specifically, the replenishment port of the liquid storage tank is located on the outer wall of the testing vehicle.

[0015] The bubble detection device includes a camera and a lighting lamp. The lighting lamp is used to illuminate the interior space of the vacuum observation chamber. The shooting angle of the lighting lamp is pointed towards the base plate. The camera is electrically connected to the control center and the power supply. The lighting lamp is electrically connected to the power supply. The control center is programmed with a bubble image recognition program.

[0016] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: soap water bubbles at the base plate weld leak point are identified by using camera recognition, avoiding judgment errors caused by manual identification; and the inconvenience of requiring workers to bend over due to the low observation angle of the base plate weld is avoided.

[0017] Furthermore, the inspection vehicle is also equipped with an alarm light, which is electrically connected to the power supply of the control center.

[0018] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting alarm lights, the staff can be clearly reminded that there are weld leaks at the detection points of the device, thereby improving work efficiency.

[0019] Furthermore, a Bluetooth module is installed on the control center, which is used to transmit images captured by the camera to mobile devices.

[0020] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by installing a Bluetooth module, while the camera is judging the air bubbles at the weld leak point, the staff can also participate in the judgment, which makes the detection of weld leak points more accurate and at the same time makes it easier for the staff to quickly understand the exact location of the weld leak point.

[0021] Furthermore, a liquid level sensor is installed inside the liquid storage tank, and the liquid level sensor is electrically connected to the control center and the power supply.

[0022] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting up a liquid level sensor, when the soap water in the storage tank is insufficient, the staff can replenish the liquid in time, avoiding affecting the normal operation of the device and improving the working efficiency of the device.

[0023] The movable wheels are located on the front and rear sides of the outer wall of the inspection vehicle.

[0024] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting the moving wheels on the front and rear sides of the inspection vehicle body, the moving wheels are avoided from being set on the bottom of the inspection vehicle body, which would affect the operation of the sealing device.

[0025] Furthermore, the material of the sealing cover is silicone rubber.

[0026] Silicone rubber is a type of rubber whose main chain is composed of alternating silicon and oxygen atoms, with two organic groups usually attached to the silicon atoms.

[0027] Furthermore, the fixed end and the first electric slider are detachably connected by a fixing mechanism, which includes a corner bracket and a bolt. The corner bracket has a through hole through which the bolt can pass. The fixed end and the first electric slider have screw holes corresponding to the positions of the through holes.

[0028] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by using a fixing mechanism to detachably connect the fixing end to the first electric slider, when the fixing end is worn down to the point of being insufficient to seal the vacuum observation cavity, the entire sealing cover can be replaced through the fixing mechanism to ensure the normal operation of the device.

[0029] Compared with the prior art, the beneficial effects of the tank floating vessel bottom plate weld inspection device provided by the present invention are as follows: by setting a sealing cover that can move up and down with the first electric slider, the sealing cover is heated and deformed when it is in contact with the bottom plate, so that it fits the bottom plate and forms a sealed space in the vacuum observation chamber. When the vacuum pump is working, it ensures that a vacuum can be formed in the vacuum observation chamber, which facilitates vacuum inspection of the bottom plate weld within the vacuum observation chamber range and avoids inaccurate judgment of weld leaks caused by air leakage during inspection; by using a camera to identify soap water bubbles at the bottom plate weld leak point, it avoids judgment errors caused by manual identification and avoids the inconvenience of workers having to bend over due to the low observation angle of the bottom plate weld. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This invention provides a schematic diagram of a device for inspecting weld seams on the bottom plate of a floating storage tank.

[0032] Figure 2 This invention provides a bottom schematic diagram of a device for detecting weld seams on the bottom plate of a floating storage tank.

[0033] Figure 3 for Figure 1 Enlarged view of section A;

[0034] Figure 4 This invention provides a cross-sectional schematic diagram of the inspection vehicle body in a tank floating hull bottom plate weld inspection device;

[0035] Figure 5 A schematic diagram of a sealing cover in a tank floating hull bottom plate weld inspection device provided by the present invention;

[0036] Figure 6 This invention provides an electrical connection diagram for a tank floating hull bottom plate weld inspection device;

[0037] The attached diagram lists the components represented by each number as follows:

[0038] 1. Vehicle body; 11. Vacuum observation chamber; 13. Warning light; 14. Moving wheels; 2. Vacuum pump; 21. Suction channel; 31. Sealing cover; 311. Deformation end; 312. Fixed end; 313. First electric slider; 314. Slide rail; 315. Second electric slider; 32. Electric heating plate; 4. Control center; 5. Power supply; 61. Liquid storage tank; 610. Liquid replenishment port; 62. Spray pipe; 63. Liquid pump; 64. Nozzle; 65. Liquid level sensor; 71. Camera; 72. Lighting light; 81. Angle code; 82. Bolt. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0041] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0044] like Figure 1 The image shows a first embodiment of a tank floating vessel bottom plate weld inspection device provided by the present invention. In this embodiment, it includes an inspection vehicle body 1, which can move along the bottom plate weld of the tank floating vessel via moving wheels 14. The bottom of the inspection vehicle body 1 has a hollow vacuum observation chamber 11, and the top of the inspection vehicle body 1 has a vacuum pump 2. The suction port of the vacuum pump 2 is connected to the vacuum observation chamber 11 through the vacuum pump 2. A bubble detection device and a soap water spraying device are installed in the vacuum observation chamber 11. The soap water spraying device is used to apply soap water to the weld to generate bubbles for weld leaks. A reusable sealing device is installed at the bottom of the vacuum observation chamber 11. The vacuum pump 2 is electrically connected to the control center 4 and the power supply 5.

[0045] like Figure 2-5 As shown, in the above technical solution, the sealing device includes a heat-deformable sealing cover 31 and an electric heating plate 32. The sealing cover 31 includes a deformable end 311 and a fixed end 312. The outer diameter of the deformable end 311 is larger than the outer diameter of the vehicle body 1. The deformable end 311 can wrap around the lower edge of the vehicle body 1. The bottom of the deformable end 311 is parallel to the bottom plate. The fixed end 312 is connected to the top of the deformable end 311. The inner wall of the fixed end 312 is tightly fitted with the bottom outer wall of the vehicle body 1. The fixed end 312 is fixedly connected to the first electric slider 313. The bottom of the outer wall of the vehicle body 1 has a slide rail 314 perpendicular to the bottom plate direction. The first electric slider 313 is slidably connected to the slide rail 314.

[0046] The bottom of the electric heating plate 32 is the same size and shape as the top surface of the deformed end 311. The top of the electric heating plate 32 is fixedly connected to one end of the L-shaped connecting arm, and the other end of the connecting arm is fixedly connected to the second electric slider 315. The second electric slider 315 is slidably connected to the slide rail 314. The first electric slider 313, the second electric slider 315, the electric heating plate 32 are electrically connected to the control center 4 and the power supply 5.

[0047] In use, pull the handle to move the device to the area of ​​the bottom plate weld that needs to be inspected, cover the vacuum observation chamber 11 on the bottom plate weld, open the sealing device, and the control center 4 sends a downward movement command to the first electric slider 313. The first electric slider 313 moves downward along the slide rail 314, thereby driving the fixed end 312 of the sealing cover 31 downward until the lower deformable end 311 of the fixed end 312 contacts the bottom plate surface. The control center 4 sends a downward movement command to the second electric slider 315. The second electric slider 315 moves downward, causing the electric heating plate 32 on the connecting arm to contact the upper surface of the deformable end 311. When the heating temperature of the electric heating plate 32 reaches the deformation temperature of the deformable end 311, the deformable end 311 begins to melt and deform, thereby making the shape of the deformable end 311 fit the bottom. The shape of the upper surface of the plate is controlled by the control center 4 to turn off the electric heating plate 32. After the electric heating plate 32 returns to room temperature, its shape is fixed, so that the vacuum observation chamber 11 is completely sealed. The control center 4 controls the soap water spraying device to start working, and the bottom plate weld is covered with soap water. The control center 4 controls the vacuum pump 2 to start working, and the vacuum pump 2 evacuates the air in the vacuum observation chamber 11, so that the vacuum observation chamber 11 forms a vacuum environment. When there is a leak in the bottom plate weld, the air under the leak in the bottom plate weld has a greater pressure than the pressure on the bottom plate weld leak. The air under the leak in the bottom plate weld rises from the floor weld leak. The rising air causes the soap water to produce soap bubbles. The bubble detection device judges whether soap bubbles are produced, that is, judges whether there is a leak in the bottom plate weld under the vacuum observation chamber 11.

[0048] After the leak detection of the bottom plate weld under the vacuum observation chamber 11 is completed, the control center 4 controls the second electric slider 315 to move upward in the slide rail 314. The electric heating plate 32 moves away from the upper surface of the deformed end 311 under the drive of the second electric slider 315. The control center 4 controls the first electric slider 313 to slide upward in the slide rail 314, pulls the deformed end 311 away from the upper surface of the bottom plate, and drags the device to the next bottom plate weld detection point, repeating the above process.

[0049] The main reason soapy water produces bubbles is due to the structure of soap molecules. Soap molecules generally consist of a hydrophilic head and a hydrophobic tail. When a soap molecule is added to water, its hydrophilic head adheres to the water surface, while its hydrophobic tail extends into the water. Because the attractive forces between water molecules are strong, the surface tension between them is very high. Therefore, the tail of the soap molecule attempts to escape the surface tension, thus forming many small vesicles, or bubbles. The longer the tail of the soap molecule, the easier it is for it to form bubbles.

[0050] In the above technical solution, the soap water spraying device includes a storage tank 61, a spray pipe 62 and a pump 63. The storage tank 61 is installed inside the body 1 of the testing vehicle. The storage tank 61 has an outlet. The outlet is connected to the spray pipe 62 through the pump 63. Multiple downward nozzles 64 are connected to the spray pipe 62.

[0051] When in use, the control center 4 issues an start command to the liquid pump 63, and the liquid pump 63 starts working to draw soap water from the storage tank 61 into the spray pipe 62. The soap liquid in the spray pipe 62 is sprayed out through the nozzle 64, and the soap liquid covers the weld seam of the bottom plate under the vacuum observation chamber 11.

[0052] In the above technical solution, the bubble detection device includes a camera 71 and a lamp 72. The lamp 72 is used to illuminate the interior space of the vacuum observation chamber 11. The shooting angle of the lamp 72 is directed towards the base plate. The camera 71 is electrically connected to the control center 4 and the power supply 5. The lamp 72 is electrically connected to the power supply 5. The control center 4 is programmed with a bubble image recognition program.

[0053] Specifically, the bubble image recognition program can utilize a flotation bubble recognition method based on a cascaded classifier, as disclosed in Chinese Invention Patent No. CN111259972A (Application No. CN202010065282.9). First, original foam images of the flotation cell under various operating conditions are acquired. Bubble regions are marked as regions of interest on the acquired original foam images, and a positive bubble detection sample set is generated. Then, non-bubble regions are cropped from the acquired original foam images to generate a negative background sample set. The generated positive and negative sample sets are simultaneously fed into a cascaded classifier to obtain a bubble detection model. The trained bubble detection model is then loaded into the host computer at the flotation site to detect bubbles in the acquired original foam images in real time and display the detection results. Based on the detection results, the location of complete bubbles in the original foam images is identified, and the bubble size distribution is statistically analyzed. This method has low requirements for image quality and is unaffected by multiple bright spots and color patches on the bubble surface, collapse, etc., enabling rapid and accurate bubble identification.

[0054] Furthermore, in the above technical solution, the inspection vehicle body 1 is also equipped with an alarm light 13, which is electrically connected to the power supply 5 of the control center 4.

[0055] In use, the lighting 72 illuminates the interior space of the vacuum observation chamber 11, and the camera 71 takes pictures of the weld seam of the base plate. The floor weld seam image data captured by the camera 71 is sent to the control center 4. The control center 4 uses a bubble image recognition program to identify and judge multiple floor weld seam image data. When soap bubbles are generated due to a leak in the base plate weld seam, the control center 4 determines that soap bubbles are present and sends an activation signal to the alarm light 13. The alarm light 13 flashes to remind the staff that there is a leak in the base plate weld seam under the vacuum observation chamber 11.

[0056] Furthermore, in the above technical solution, a Bluetooth module is installed on the control center 4, which is used to transmit images captured by the camera 71 to the mobile device.

[0057] like Figure 6 As shown, further, in the above technical solution, a liquid level sensor 65 is installed in the liquid storage tank 61, and the liquid level sensor 65 is electrically connected to the control center 4 and the power supply 5.

[0058] Specifically, there are two alarm lights 13. One is a weld leak alarm light and the other is a soap solution level alarm light. The liquid level sensor 65 sends the liquid level data in the storage tank 61 to the control center 4 in real time. When the soap solution in the storage tank 61 is lower than the liquid level threshold, the alarm light 13 is activated by the control center 4.

[0059] In the above technical solution, the movable wheels 14 are installed on the front and rear sides of the outer wall of the inspection vehicle body 1.

[0060] Furthermore, in the above technical solution, the material of the sealing cover 31 is silicone rubber.

[0061] Silicone rubber is a polymeric material composed of polymeric siloxane (Si-O-Si) chains, commonly known as polydimethylsiloxane (PDMS). Silicone rubber possesses excellent chemical resistance and electrical insulation properties, along with good flexibility, elasticity, weather resistance, and fatigue resistance, making it widely used in industrial, medical, and electronic fields.

[0062] Silicone rubber is widely used in aerospace, automotive, machinery, construction, medical, and electronics industries for manufacturing seals, sound insulation and vibration damping materials, electronic components, medical devices, and food packaging. Common types of silicone rubber include HTV silicone rubber (solid silicone rubber), RTV silicone rubber (room temperature curing silicone rubber), and LSR liquid silicone rubber.

[0063] Generally, silicone rubber can withstand a maximum operating temperature of around 170℃, although this may vary slightly depending on the type of silicone rubber. When the temperature exceeds the deformation temperature of silicone rubber, it will undergo plastic deformation. Its deformation temperature is related to factors such as material hardness, filler, crosslinking density, and external stress. Typically, the deformation temperature range for silicone rubber is 200℃-250℃.

[0064] Furthermore, in the above technical solution, the fixed end 312 and the first electric slider 313 are detachably connected by a fixing mechanism. The fixing mechanism includes a corner bracket 81 and a bolt 82. The corner bracket 81 has a through hole that allows the bolt 82 to pass through. The fixed end 312 and the first electric slider 313 have screw holes corresponding to the positions of the through holes.

[0065] In use, when the fixed end 312 reaches its service life limit due to wear or deformation, remove the bolt 82 on the corner bracket 81. The fixing effect of the corner bracket 81 on the first electric slider 313 and the fixed end 312 disappears, and the fixed end 312 falls off the first electric slider 313. Align the new sealing cover 31 with the bottom of the inspection vehicle body 1, with the fixed end 312 abutting against the first electric slider 313. Align the corner bracket 81 with the bolt holes of the fixed end 312 and the first electric slider 313, tighten the bolt 82, and fix the first electric slider 313 and the sealing cover 31.

[0066] Specifically, the principle of this invention is as follows: Pulling the handle moves the device to the area of ​​the bottom plate weld that needs inspection. The vacuum observation chamber 11 covers the bottom plate weld. The sealing device is activated. The control center 4 sends a downward movement command to the first electric slider 313. The first electric slider 313 moves downward along the slide rail 314, thereby driving the fixed end 312 of the sealing cover 31 downward until the lower deformed end 311 of the fixed end 312 contacts the bottom plate surface. The control center 4 then sends a downward movement command to the second electric slider 315. The slider 315 moves downward, causing the electric heating plate 32 on the connecting arm to contact the upper surface of the deformable end 311. When the heating temperature of the electric heating plate 32 reaches the deformation temperature of the deformable end 311, the deformable end 311 begins to melt and deform, thereby making the shape of the deformable end 311 conform to the shape of the upper surface of the base plate. The control center 4 controls the electric heating plate 32 to turn off. After the electric heating plate 32 returns to room temperature, its shape is fixed, making the vacuum observation chamber 11 completely sealed. The control center 4 issues an start command to the pump 63, and the pump 63 starts working to extract liquid from the storage tank. The soapy water in 61 enters the spray pipe 62, and the soapy water in the spray pipe 62 is sprayed out through the nozzle 64, covering the bottom plate weld seam under the vacuum observation chamber 11. The control center 4 controls the vacuum pump 2 to start working, and the vacuum pump 2 evacuates the air in the vacuum observation chamber 11, creating a vacuum environment in the vacuum observation chamber 11. When there is a leak in the bottom plate weld seam, the air under the leak is under a pressure greater than the pressure above the leak, and the air under the leak rises and flows out from the floor weld leak. The surging air causes the soapy water to be produced at this location. Soap bubbles are generated. Light 72 illuminates the interior of the vacuum observation chamber 11. Camera 71 takes pictures of the weld seam of the base plate. The image data of the floor weld seam captured by camera 71 is sent to control center 4. Control center 4 uses a bubble image recognition program to identify and judge multiple floor weld seam image data. When soap bubbles are generated due to a leak in the base plate weld seam, control center 4 determines that soap bubbles are present. Control center 4 sends an activation signal to alarm light 13. Alarm light 13 flashes to remind staff that there is a leak in the base plate weld seam under the vacuum observation chamber 11.

[0067] After the leak detection of the bottom plate weld under the vacuum observation chamber 11 is completed, the control center 4 controls the second electric slider 315 to move upward in the slide rail 314. The electric heating plate 32 moves away from the upper surface of the deformed end 311 under the drive of the second electric slider 315. The control center 4 controls the first electric slider 313 to slide upward in the slide rail 314, pulls the deformed end 311 away from the upper surface of the bottom plate, and drags the device to the next bottom plate weld detection point, repeating the above process.

[0068] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A device for inspecting weld seams on the bottom plate of a floating storage tank, comprising an inspection vehicle body (1), wherein the inspection vehicle body (1) is movable along the weld seams on the bottom plate of the floating storage tank via wheels (14), characterized in that, The bottom of the inspection vehicle body (1) has a hollow vacuum observation cavity (11), and the top of the inspection vehicle body (1) has a vacuum pump (2). The suction port of the vacuum pump (2) is connected to the vacuum observation cavity (11) through the vacuum pump (2). A bubble detection device and a soap water spraying device are installed in the vacuum observation cavity (11). The soap water spraying device is used to apply soap water to the weld to generate bubbles at the weld leak point. A reusable sealing device is installed at the bottom of the vacuum observation cavity (11). The vacuum pump (2) is electrically connected to the control center (4) and the power supply (5). The sealing device includes a heat-deformable sealing cover (31) and an electric heating plate (32). The sealing cover (31) includes a deformable end (311) and a fixed end (312). The outer diameter of the deformable end (311) is larger than the outer diameter of the vehicle body (1). The deformable end (311) can wrap around the lower edge of the vehicle body (1). The bottom of the deformable end (311) is parallel to the bottom plate. The fixed end (312) is connected to the top of the deformable end (311). The inner wall of the fixed end (312) is tightly fitted with the bottom outer wall of the vehicle body (1). The fixed end (312) is fixedly connected to the first electric slider (313). The bottom of the outer wall of the vehicle body (1) has a slide rail (314) perpendicular to the bottom plate. The first electric slider (313) is slidably connected to the slide rail (314). The bottom of the electric heating plate (32) is the same size and shape as the top surface of the deformed end (311). The top of the electric heating plate (32) is fixedly connected to one end of the L-shaped connecting arm. The other end of the connecting arm is fixedly connected to the second electric slider (315). The second electric slider (315) is slidably connected to the slide rail (314). The first electric slider (313), the second electric slider (315), the electric heating plate (32) are electrically connected to the control center (4) and the power supply (5).

2. The device for inspecting weld seams on the bottom plate of a storage tank floating vessel according to claim 1, characterized in that, The soap water spraying device includes a storage tank (61), a spray pipe (62), and a pump (63). The storage tank (61) is installed inside the body (1) of the testing vehicle. The storage tank (61) has an outlet. The outlet is connected to the spray pipe (62) via the pump (63). The spray pipe (62) is connected to multiple downward-facing nozzles (64).

3. The device for inspecting weld seams on the bottom plate of a storage tank floating vessel according to claim 2, characterized in that, The bubble detection device includes a camera (71) and a lighting lamp (72). The lighting lamp (72) is used to illuminate the interior space of the vacuum observation chamber (11). The shooting angle of the lighting lamp (72) is directed towards the bottom plate. The camera (71) is electrically connected to the control center (4) and the power supply (5). The lighting lamp (72) is electrically connected to the power supply (5). The control center (4) is programmed with a bubble image recognition program.

4. The device for inspecting weld seams on the bottom plate of a storage tank floating vessel according to claim 3, characterized in that, The detection vehicle body (1) is also equipped with an alarm light (13), which is electrically connected to the power supply (5) of the control center (4).

5. The device for inspecting weld seams on the bottom plate of a storage tank floating vessel according to claim 4, characterized in that, The control center (4) is equipped with a Bluetooth module, which is used to transmit images captured by the camera (71) to a mobile device.

6. The device for inspecting weld seams on the bottom plate of a storage tank floating vessel according to claim 5, characterized in that, The liquid storage tank (61) is equipped with a liquid level sensor (65), which is electrically connected to the control center (4) and the power supply (5).

7. The device for inspecting weld seams on the bottom plate of a storage tank floating vessel according to claim 6, characterized in that, The movable wheels (14) are located on the front and rear sides of the outer wall of the detection vehicle body (1).

8. The device for inspecting weld seams on the bottom plate of a storage tank floating vessel according to claim 7, characterized in that, The material of the sealing cover (31) is silicone rubber.

9. The device for inspecting weld seams on the bottom plate of a storage tank floating vessel according to claim 8, characterized in that, The fixed end (312) is detachably connected to the first electric slider (313) through a fixing mechanism. The fixing mechanism includes a corner bracket (81) and a bolt (82). The corner bracket (81) has a through hole through which the bolt (82) can pass. The fixed end (312) and the first electric slider (313) have screw holes corresponding to the positions of the through holes.

Images