Container thermal spraying equipment

Abstract

The invention belongs to the technical field of thermal spraying, and particularly relates to container thermal spraying equipment which comprises spraying equipment, a gas tank, a stretching structure and a main frame, the bottom of the stretching structure is connected with the main frame through a rotating arm, and a line body and a spraying pipe of the spraying equipment are fixed to the outer wall of the stretching structure through a line clamp. The detection component is sent into the container through the stretching structure, the integrity of the coating on the inner wall of the container is detected through the detection component, and when the damage condition is detected, the shielding structure is started to complete shielding of the detection component and detect whether combustible gas and harmful gas in the container are in safety thresholds or not; in a safe state, the electric arc spraying gun is started to spray a corresponding damaged area, after spraying is completed, the detection component is used for checking, if gas with high concentration exists in the container, the external gas tank is started, inert gas is fed into the container, the concentration of other gas is reduced, the repairing period of the container coating is shortened, and the repairing efficiency is improved. And meanwhile, the safety is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of thermal spraying, in particular to a container thermal spraying device. BACKGROUND

[0002] When containing water, chemicals, wet materials or in a corrosive environment, electrochemical corrosion is prone to occur, leading to corrosion of the container wall, failure, leakage and even structural collapse. In the mining, power, cement and other industries, the container often flows or stirs materials with abrasiveness, such as sand, coal powder and cement. Due to the continuous erosion and wear of the inner wall of the container by these materials, the wall thickness is thinned, so the above two types of containers need to be sprayed inside to form a coating.

[0003] Because solid materials, whether particles, powders or blocky materials, directly impact the bottom coating during the feeding process, this continuous and pointwise impact force can cause micro-cracks, plastic deformation or even local peeling of the coating. The corrosive substances, impurities or solid particles in the solution in the chemical container will accumulate and deposit at the bottom due to gravity, which makes the bottom coating face a higher concentration of chemical corrosion than the average concentration contacted by the side wall. Therefore, the coating at the bottom area of the inner wall of the container is more prone to damage than other areas.

[0004] For larger containers such as oil tanks, manual repair is often used when repairing. However, due to long-term contact with chemicals, the internal air of the chemical container is complex, and it often takes a long time to ventilate the container before personnel can enter, which greatly prolongs the repair time. The residual gas in the tank has different heat capacity, thermal conductivity and density. If the gas in the spraying environment is different from the preset during the design of the spray gun, it may change the temperature and flight speed of the jet. Some gases have higher heat capacity and thermal conductivity, which can cause premature solidification. More often, acidic gases such as hydrogen chloride and sulfur dioxide will form corrosive acid when they come into contact with high-temperature components of the spray gun, accelerating the wear of the nozzle and electrode.

[0005] In addition, containers for containing solids need to meet safety conditions such as gas detection, effective ventilation and effective energy isolation when personnel enter for repair.

[0006] In addition, there are some containers that cannot be entered by the human body, and their repair work needs to be checked and confirmed first, then the device is deepened by manual holding or relying on tools, and at the same time, it also needs to rely on the detection of multiple detection devices sent in, so the repair cycle is long.

[0007] The existing patent (publication number: CN202111571421.6) and a high-speed electric arc processing device with self-moving function for the inner wall of the pipeline mainly solve the problem of electric arc spraying in the pipeline, but it cannot be applied to the container, and it does not consider the problem of pipeline coating repair.

[0008] Therefore, we propose a container thermal spraying equipment, which is beneficial to shorten the period of container coating repair and ensure safety. SUMMARY

[0009] In order to overcome the above-mentioned defects of the prior art, the present application provides a container thermal spraying equipment to solve the problems existing in the above background art.

[0010] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme: a container thermal spraying equipment, comprising a spraying equipment, a gas tank, an extension structure and a main frame, the bottom of the extension structure is connected with the main frame through a rotating arm, the wire body and spraying pipe of the spraying equipment, and the gas pipe of the gas tank are all fixed on the outer wall of the extension structure through a wire clamp, characterized in that: the bottom of the main frame is connected with an electric arc spraying gun, the bottom of the electric arc spraying gun is connected with a shielding structure, and the bottom of the shielding structure is installed with a detection component. The detection component is used to detect the coating state of the inner wall of the container and the concentration of combustible gas and harmful gas in the container; The detection component positions the coating missing or unqualified position of the inner wall of the container, and the main frame moves the gun mouth of the electric arc spraying gun to the corresponding position according to the positioning information; When the extension structure moves the main frame and the electric arc spraying gun to the bottom of the container, if the detection component detects that the concentration of combustible gas or harmful gas exceeds the preset threshold, the inert gas in the gas tank is sent into the bottom of the container through the gas pipe; when the gas concentration decreases to the threshold range, the electric arc spraying gun starts.

[0011] Further, the top of the extension structure is installed with a fixing frame, the bottom of the fixing frame is installed with a hydraulic telescopic rod, the end of the hydraulic telescopic rod is connected with the rotating arm through a rotating joint, the rotating arm is built-in with a rotating motor, and the output shaft of the rotating motor is connected with the main frame.

[0012] Further, the detection component is a first detection structure in a rectangular shape, the four edges of the first detection structure are respectively installed with light receiving components, the lower side of each light receiving component is provided with a photoelectric sensor, the bottom of the first detection structure is installed with a first gas sensor, and the outer wall of the first detection structure is provided with a wiring hole.

[0013] Further, the main frame bottom is provided with a bearing ring, the inner wall of the bearing ring is provided with a fixed pipe clamp, and the fixed pipe clamp is used for fixing the wire body, the gas pipe and the spraying pipe; the frame of the electric arc spraying gun is provided with a pipe joint above the frame, the pipe joint is communicated with a guide pipe at the bottom, and the gas outlet direction of the guide pipe is consistent with the jet direction of the electric arc spraying gun.

[0014] Further, the shielding structure comprises a connecting shell, the outer wall of the connecting shell is slidingly nested with a shielding ring, an electric push rod is installed on the connecting shell, and the electric push rod is used to drive the shielding ring to move to shield the detection component below.

[0015] Further, the detection component is a cylindrical second detection structure, an electric sliding rail is installed between the second detection structure and the shielding structure, and the electric sliding rail is used to drive the second detection structure to rotate around the axis thereof; an optical component and a photodetector are sequentially installed on the outer wall of the second detection structure from top to bottom, a second gas sensor is installed at the bottom of the second detection structure, and the second gas sensor is connected with a detection pipe.

[0016] Further, the rotary motor is provided with a rotation base point, and the maximum angle of single rotation of the rotary motor is °.

[0017] Further, an electric slip ring is installed at the top of the second detection structure and is used to connect various lines; the pipe opening of the detection pipe is opposite to the gas outlet direction of the guide pipe.

[0018] Compared with the prior art, the technical effects and advantages of the present application are as follows: 1) The container thermal spraying equipment of the present application sends the detection component into the container through the stretching structure, detects the integrity of the coating on the inner wall of the container through the detection component, starts the shielding structure to shield the detection component when the damage is detected, detects whether the combustible gas and the harmful gas in the container are within the safety threshold, starts the electric arc spraying gun to spray the damaged area when the safety state is reached, and checks the container again after the spraying is completed; if there is a gas with high concentration in the container, an external gas tank is started to send inert gas into the container to reduce the concentration of other gases, which is beneficial to shorten the period of container coating repair and ensure safety.

[0019] 2) The container thermal spraying equipment of the present application monitors the working environment through the gas sensor, avoids starting the electric arc spraying when the concentration of combustible gas or harmful gas exceeds the standard, starts the gas tank to add inert gas for dilution, ensures that the entire working process is always below the lower explosive limit, eliminates the explosion risk, replaces the harmful gas at the bottom of the container, and improves the spraying efficiency.

[0020] 3) The container thermal spraying device of the present application, through the cooperation of the extension structure and the detection component, can quickly scan and accurately locate the coating defect points of the inner wall, and immediately carry out targeted repair by the electric arc spraying gun, which saves a large amount of time consumed by repeated ventilation, personnel access, and multiple equipment moving in the traditional method, and the maintenance efficiency can be improved for large containers or facilities that need frequent maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a schematic diagram of the rotary joint and main frame structure of the present application; Figure 3 is a schematic diagram of the rotary motor and main frame structure of the present application; Figure 4 is a schematic diagram of the first detection structure of the present application; Figure 5 is a schematic diagram of the second detection structure of the present application; Figure 6 is a schematic diagram of the shielding structure of the present application; Figure 7 is a schematic diagram of the extension structure, spraying device and gas tank of the present application.

[0022] The figure reference is: 1, main frame; 2, rotary arm; 21, rotary motor; 3, bearing ring; 31, fixed pipe clamp; 32, wire body; 33, spraying pipe; 34, gas pipe; 341, pipe joint; 342, guide pipe; 4, electric arc spraying gun; 5, shielding structure; 51, connection shell; 52, shielding ring; 53, electric push rod; 6, first detection structure; 61, light emitting component; 62, photoelectric sensor; 63, wiring hole; 64, first gas sensor; 7, extension structure; 71, rotary joint; 72, hydraulic telescopic rod; 73, fixed frame; 8, second detection structure; 81, electric slip ring; 82, electric sliding rail; 83, optical component; 84, photoelectric detector; 85, second gas sensor; 851, detection pipe; 9, spraying device; 91, gas tank. DETAILED DESCRIPTION

[0023] The technical solutions in the present application will be described clearly and completely below in combination with the drawings in the present application, and in addition, the forms of each structure described in the following embodiments are only examples, and the structures involved in the present application are not limited to each structure described in the following embodiments. All other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application. EMBODIMENT

[0024] Please refer to Figures 1-7The present application provides a technical solution: when the device is working, the whole device is placed into the manhole or the top opening of the container, and the fixing frame 73 is responsible for fixing and sealing at the opening of the container, serving as the support basis of the whole device, all cables and pipelines are introduced through this place and arranged along the stretching structure 7.

[0025] A container thermal spraying device 9, comprising a spraying device 9, a gas tank 91, a stretching structure 7 and a main frame 1, the bottom of the stretching structure 7 is connected with the main frame 1 through a rotating arm 2, the height of the main frame 1 is adjusted through the telescopic structure, the orientation of the main frame 1 is adjusted through the rotating arm 2, the wire body 32 and the spraying pipe 33 of the spraying device 9 are fixed on the outer wall of the stretching structure 7 through a wire clamp, and the gas of the gas tank 91 is fixed on the outer wall of the stretching structure 7 through a wire clamp, the bottom of the main frame 1 is connected with an arc spraying gun 4, the bottom of the arc spraying gun 4 is connected with a shielding structure 5, and the bottom of the shielding structure 5 is installed with a detection component; The spraying device 9 is built-in with a wire feeding system, including a wire feeding mechanism, a wire feeding disc frame and a wire feeding hose, a power supply and an atomization system.

[0026] The wire feeding mechanism usually has two or more pairs of driving wheels inside, which are driven by a speed regulating motor, and the surface of the driving wheels has grooves or patterns for clamping and pushing the metal wire, which is usually equipped with a pressure roller, which provides adjustable pressure through a spring or pneumatic device to prevent slipping.

[0027] The wire disc is used to place the coiled metal wire, such as zinc wire, aluminum wire and alloy wire.

[0028] The wire feeding hose is a high flexibility and wear-resistant conduit with a polytetrafluoroethylene lining inside, which is used to independently and non-interferingly transport two wires from the wire feeder to the spray gun.

[0029] The power supply includes a spraying power supply, a control circuit board and a human-machine interface.

[0030] The spraying power supply is a special DC power supply with flat or slow descending characteristics, which can provide stable large current, usually 100-400A, and can provide sufficient current increment to rapidly melt the wire when the wire is short-circuited to ignite the arc.

[0031] The control system is a microprocessor that receives operator instructions and sensor feedback to accurately control wire feeding speed, spraying voltage, current and atomization gas flow, and all parameters can be set and displayed through the human-machine interface.

[0032] The atomization gas system includes an air compressor, a gas storage tank, a cooling and drying machine, a filter and a gas pressure regulating valve.

[0033] It is mainly responsible for providing clean, dry, pressure stable compressed air, air through cooling to remove liquid water, through filtration to remove oil and solid particles, and then through the regulating valve to accurately control the pressure and flow, and finally through the pipeline to the spray gun.

[0034] The electric arc spraying gun 4 has a conductive nozzle, a nozzle assembly, an arc cover and a front guide pipe assembly; The conductive nozzle is used for conducting electricity and reducing the friction resistance of wire feeding, and the diameter needs to match the wire specification to ensure stable conductivity.

[0035] The nozzle assembly includes an atomizing nozzle and an air cap, which atomizes the molten metal through high-speed airflow, and the air cap can adjust the atomization effect. The arc cover is used to shield the arc light and prevent the arc light from leaking out and hurting people.

[0036] The front guide pipe assembly is made of conductive material and is used to guide the intersection of metal wires.

[0037] The combination of the electric arc spraying gun 4 and the spraying equipment 9 is a relatively mature use combination in thermal spraying. The detection component detects the coating on the inner wall of the container, and detects the combustible gas and harmful gas in the container; The stretching structure 7 moves the main frame 1 and the electric arc spraying gun 4 to the bottom of the container, and when the combustible gas and harmful gas exceeds the threshold range, the inert gas in the gas tank 91 is sent to the bottom of the container through the gas pipe 34, and when the combustible gas and harmful gas of the detection component meet the threshold range, the electric arc spraying gun 4 is started, and the detection component is positioned at the position of the coating missing or unqualified position, and the main frame 1 moves the gun barrel of the electric arc spraying gun 4 to the corresponding coating missing or unqualified position.

[0038] The threshold range needs to be formulated according to the safety production standard, and also needs to be adjusted according to the size of the container. Since the device does not need to be manually operated in the container, the concentration of combustible gas does not change much compared with manual operation, and the concentration of combustible gas in the confined space must be less than 10% of the lower explosive limit (LEL) according to the standard, but the harmful gas does not need to reach the standard of manual operation, and can refer to carbon monoxide < 25-35 ppm, hydrogen sulfide < 5-10 ppm. The device only needs to protect the workers outside the container.

[0039] The main frame 1 is provided with a bearing ring 3 at the bottom, and the inner wall of the bearing ring 3 is provided with a fixed pipe clamp 31. The fixed pipe clamp 31 fixes the wire body 32, the gas pipe 34 and the spraying pipe 33. The frame of the electric arc spraying gun 4 is provided with a pipe joint 341 above, and the bottom of the pipe joint 341 is communicated with a guide pipe 342. The gas direction of the guide pipe 342 is the same as the direction of the nozzle of the electric arc spraying gun 4.

[0040] The outer wall of the connecting shell 51 of the shielding structure 5 is slidingly nested with a shielding ring 52, the connecting shell 51 is installed with an electric push rod 53 for moving the shielding ring 52, and the electric push rod 53 is started to shield the detection structure with the shielding ring 52.

[0041] The connecting shell 51 is fixed at the bottom of the electric arc spraying gun 4, the shielding ring 52 is installed on the connecting shell 51 through a sliding nesting relationship, when the detection is completed and the spraying is about to start, the electric push rod 53 receives a signal and acts to push or pull the shielding ring 52 to slide downward along the connecting shell 51, completely covering the detection structure below to isolate it from the spraying operation area, and after the operation is completed, the electric push rod 53 retracts the shielding ring 52 to expose the detection components for re-inspection.

[0042] The top fixing frame 73 is installed above the manhole or access hole of the container as a stable base of the entire device, and the hydraulic telescopic rod 72 is extended downward to send the rotating arm 2 and the main frame 1 connected at the end thereof to a specified depth inside the container, especially the bottom area which is easy to be damaged, and the rotating motor 21 is started to drive the rotating arm 2 and the main frame 1 to swing in the horizontal plane, so that the detection components installed below the main frame 1 can scan the side wall.

[0043] After the device is in place, the optical components 83 of the second detection structure 8 are started to emit light signals to the inner wall of the container, and the reflected signals are received by the photoelectric detector 84 to analyze and judge the integrity of the coating, when the coating is intact, the light reflection has a specific pattern and intensity; when there are peeling, cracking or holes, the intensity, scattering pattern or three-dimensional morphology of the reflected light will change, and through this change, the position and range of the defect can be accurately located, after the defect is located, the main frame 1 moves the electric arc spraying gun 4 to a suitable distance in front of the defect point; Then the gas sensor is started to detect the concentration of flammable and toxic gases in the space at the bottom of the container, if the concentration of flammable and toxic gases is detected to be higher than the threshold value, the gas tank 91 is further started to deliver the inert gas therein through the gas pipe 34, and finally the inert gas is sprayed forward from the guide pipe 342 beside the spraying gun; When the concentration of flammable and toxic gases is lower than the threshold value, the electric arc spraying gun 4 is started for thermal spraying, a high-temperature arc is generated by short-circuiting of two metal wires as a heat source to melt the end of the wire, and at the same time, high-speed compressed air is used to atomize and accelerate the molten metal droplets to the surface of the substrate to form a coating, the guide pipe 342 is arranged in the same direction as the spraying gun, and the inert gas sprayed forms a gas curtain in front of the spraying gun, which can remove part of the harmful gas around the spraying gun, provide a short pure environment for the high-temperature metal droplets in flight, reduce the oxidation and nitridation of the droplets, and thus improve the quality of the coating.

[0044] After the optical detection is completed, before the spraying starts, the electric push rod 53 starts to push the shielding ring 52 to slide downward, completely covering the lower detection components, preventing high-temperature metal droplets and spraying dust from damaging the precise optical windows and sensors of the detection components, ensuring the long-term service life and measurement accuracy of the detection components.

[0045] The top of the stretching structure 7 is provided with a fixing frame 73, the bottom of the fixing frame 73 is provided with a hydraulic telescopic rod 72, the end of the hydraulic telescopic rod 72 is connected with a rotary arm 2 through a rotary joint 71, the rotary arm 2 is built-in with a rotary motor 21, and the shaft body of the rotary motor 21 is connected with the main frame 1.

[0046] The vertical height of the terminal equipment is changed by the direct telescopic movement of the hydraulic telescopic rod 72, and the horizontal angle of the equipment is changed by the direct rotary movement of the rotary motor 21.

[0047] This movement mode is consistent with the shape of the container, the control logic is simple, the complex Cartesian coordinate conversion is avoided, the movement trajectory is smooth and easy to calculate, and it is suitable for executing the scanning and spraying path of the inner wall.

[0048] The bearing ring 3 installed at the bottom of the main frame 1 is used for fixing the wire body 32, the gas pipe 34 and the spraying pipe 33, the pipelines are free to rotate with the main frame 1 and the spraying gun and the detection components thereon, the wire body 32 can rotate synchronously with the main frame 1 as a whole instead of twisting itself, thereby eliminating the risk of pipeline wear, knotting or even breaking caused by repeated twisting.

[0049] The detection component is a rectangular first detection structure 6, the four sides of the first detection structure 6 are respectively provided with light receiving components 61, the light receiving components 61 are provided below photoelectric sensors 62, the bottom of the first detection structure 6 is provided with a first gas sensor 64, and the outer wall of the first detection mechanism is provided with a wiring hole 63.

[0050] The first detection structure 6 adopts a rectangular shape, and a plurality of groups of light receiving components 61 such as laser emitting diodes and photoelectric sensors 62 are arranged in an array on the four sides, in working, a two-dimensional light grid is emitted to cover the front area, and the intensity or deformation of the light reflected by the inner wall is analyzed to quickly judge the large-area coating defect.

[0051] The light receiving component 61 refers to a laser diode array or a small laser, which is responsible for emitting dense and regularly arranged dot or line light spots to the inner wall of the container.

[0052] The photoelectric sensor 62 is usually a CMOS or CCD image sensor, which can be understood as a miniature camera, and is responsible for receiving and recording the light spot image reflected by the inner wall.

[0053] The light emitting component 61 projects uniform light to the inner wall. The intact coating surface has specific reflectivity and scattering characteristics. The reflected light intensity of the photoelectric sensor 62 will be within a certain range.

[0054] When the light irradiates the coating peeling area or the hole, the reflected light intensity of these areas will change dramatically. The metal substrate has higher reflectivity, and the hole has almost no reflection.

[0055] The first gas sensor 64 is responsible for detecting the environmental gas safety directly below the device. It converts the volume fraction of a certain gas into a corresponding electrical signal converter. The gas sensor is used to condition the gas sample, which usually includes filtering impurities and interfering gases, drying or refrigeration treatment of the instrument display part.

[0056] This mode has fast detection speed and is suitable for rapid general survey of the inner wall of the container to quickly find large-area peeling, holes and other macro defects. The disadvantage is that the precision is relatively low, and it is difficult to accurately measure the depth of the defect. The first gas sensor 64 at the bottom is responsible for directly detecting the gas environment directly below the device, and the wiring hole 63 is used to connect the line.

[0057] Among them, the detection component is a cylindrical second detection structure 8, and an electric sliding rail 82 is installed between the second detection structure 8 and the shielding structure 5. The electric sliding rail 82 drives the second detection structure 8 to rotate. The outer wall of the second detection structure 8 is sequentially provided with an optical component 83 and a photodetector 84 from top to bottom. The second detection structure 8 is provided with a second gas sensor 85 at the bottom. The second gas sensor 85 is connected with a detection tube 851. The second detection structure 8 is provided with an electric slip ring 81 for connecting the line at the top. The pipe opening of the detection tube 851 is opposite to the gas direction of the guide pipe 342.

[0058] The second detection structure 8 is cylindrical, and the electric sliding rail 82 at the bottom can drive the entire cylindrical structure to rotate 360°. The optical component 83 on the outer wall of the second detection structure 8 is, for example, a laser scanner, and the photodetector 84 rotates with it to accurately scan the surrounding inner wall point by point or line by line.

[0059] Its high-precision scanning can collect a large amount of point data through rotation, thereby accurately reconstructing the three-dimensional topography of the inner wall of the container. Not only can the defect be located, but also the depth of the pit and the width of the scratch can be accurately measured, thereby providing accurate data support for fine repair. However, its scanning speed is relatively slow.

[0060] The optical component 83 is a high-precision single-point laser range finder or laser scanner, and the photodetector 84 is built in the laser range finder and used for receiving reflected laser.

[0061] The motorized slide rail 82 drives the second detection structure 8 to rotate slowly and uniformly. Meanwhile, the laser probe on it emits laser points to the inner wall of the container at a very high frequency. For each laser point emitted, the photodetector 84 records the reflected light. By calculating the time for the laser to return or the position offset of the reflected light point on the detector, the position hit by the laser point can be calculated extremely accurately according to the triangulation method, and the absolute distance from the distance sensor can be calculated.

[0062] The second gas sensor 85 samples through a detection tube 851, and the tube opening is extended to a position away from the lance and the guide pipe 342, so as to extract a more representative sample of the ambient gas and avoid interference with the authenticity of the detection result by the inert gas sprayed. The second gas sensor 85 and the first gas sensor 64 can be of the same type The rotary motor 21 is provided with a rotation base point, and the single rotation maximum angle is 180°.

[0063] In order to optimize the structural design and avoid pipeline winding, for most vertical cylindrical containers, the operation range of the lance does not need to be rotated completely by 360°, and the rotation base point is set to 0° in a limited 180° swing range. By rotating clockwise by 180° and counterclockwise by 180°, the rotation of 360° is completed, so that the problem of pipeline winding can be avoided.

[0064] It should be noted that the size and structure of the extension structure 7 required to cooperate with containers of different volumes are different, but their functionality is similar, and the main function of the fixing frame 73 is to cooperate with the external structure for setting, which can be used with the mechanical arm of a large engineering vehicle.

[0065] The working principle of the embodiment of the application is as follows: the fixing frame 73 is installed above the manhole or access hole of the container, serving as a stable base of the entire device. The spraying device 9 and the gas tank 91 are moved to the vicinity, the hydraulic telescopic rod 72 is extended downward, the rotary arm 2 and the main frame 1 connected at the end thereof are sent to the specified depth inside the container, the bearing ring 3 installed at the bottom of the main frame 1 is used to fix the wire body 32, the gas pipe 34 and the spraying pipe 33, the pipelines rotate freely with the main frame 1 and the lance and detection components thereon, and the wire body 32 can rotate synchronously with the main frame 1 as a whole. After the device is in place, the optical component 83 is started, emitting a light signal to the inner wall of the container, and receiving the reflected signal through the photodetector 84, to analyze and judge the integrity of the coating, based on the principle of optics, when the coating is intact, the light reflection has a specific mode and intensity; when there are peeling, cracks or holes, the intensity, scattering mode or three-dimensional morphology of the reflected light will change, that is, the location and range of the defect can be accurately positioned, and then the gas sensor is started first, detecting the concentration of flammable and toxic gases in the space at the bottom of the container, if the concentration of flammable and toxic gases is detected to be higher than the threshold value, then the gas tank 91 is started, inert gas in the gas tank is delivered through the gas pipe 34, and finally sprayed forward from the guide pipe 342 beside the spray gun; After the optical detection is completed, before the spraying starts, the electric push rod 53 is started, pushing the shielding ring 52 to slide downward, completely covering the detection components below; When the concentration of flammable and toxic gases is lower than the threshold value, the electric arc spraying gun 4 is started for thermal spraying, the spraying material is sent into the electric arc spraying gun 4 through the spraying pipe 33 by the spraying device 9, the guide pipe 342 is arranged in the same direction as the spraying gun, after the spraying is completed, a period of time is left, the electric push rod 53 is started to reset the shielding ring 52, and the repair effect is judged according to the reflected signal received by the photodetector 84 through the optical component 83.

[0066] The above shows and describes the basic principles and main features of the present application and the advantages of the present application, for those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or essential characteristics of the present application; therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application, any reference signs in the claims should not be regarded as limiting the claims involved.

[0067] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A container thermal spraying device, comprising a spraying device (9), a gas tank (91), an extension structure (7), and a main frame (1), wherein the bottom of the extension structure (7) is connected to the main frame (1) via a rotating arm (2), and the line body (32) and spraying pipe (33) of the spraying device (9), as well as the gas pipe (34) of the gas tank (91), are all fixed to the outer wall of the extension structure (7) by wire clamps, characterized in that: The bottom of the main frame (1) is connected to an electric arc spray gun (4), the bottom of the electric arc spray gun (4) is connected to a shielding structure (5), and a detection component is installed at the bottom of the shielding structure (5). The detection component is used to detect the coating condition of the inner wall of the container and to detect the concentration of combustible and harmful gases inside the container. The detection component locates the missing or unqualified coating on the inner wall of the container, and the main frame (1) moves the nozzle of the arc spray gun (4) to the corresponding position according to the positioning information. When the extension structure (7) moves the main frame (1) and the arc spray gun (4) to the bottom of the container, if the detection component detects that the concentration of combustible gas or harmful gas exceeds the preset threshold, it controls the inert gas in the gas tank (91) to be sent to the bottom of the container through the gas pipe (34); when the gas concentration drops to within the threshold range, the arc spray gun (4) is activated.

2. The container thermal spraying equipment according to claim 1, characterized in that: The top of the extension structure (7) is fitted with a fixed frame (73), and the bottom of the fixed frame (73) is fitted with a hydraulic telescopic rod (72). The end of the hydraulic telescopic rod (72) is connected to the rotating arm (2) via a rotating joint (71). The rotating arm (2) has a built-in rotating motor (21), and the output shaft of the rotating motor (21) is connected to the main frame (1).

3. The container thermal spraying equipment according to claim 1, characterized in that: The detection component is a rectangular first detection structure (6). Light receiving and transmitting components (61) are installed on the four sides of the first detection structure (6). A photoelectric sensor (62) is provided below each of the light receiving and transmitting components (61). A first gas sensor (64) is installed at the bottom of the first detection structure (6). A wiring hole (63) is provided on the outer wall of the first detection structure (6).

4. The container thermal spraying equipment according to claim 1, characterized in that: The main frame (1) is equipped with a bearing ring (3) at the bottom, and a fixing pipe clamp (31) is installed on the inner wall of the bearing ring (3). The fixing pipe clamp (31) is used to fix the line body (32), gas pipe (34) and spray pipe (33). A pipe connector (341) is installed above the frame of the electric arc spray gun (4). The bottom of the pipe connector (341) is connected to a guide pipe (342). The air outlet direction of the guide pipe (342) is consistent with the nozzle direction of the electric arc spray gun (4).

5. The container thermal spraying equipment according to claim 1, characterized in that: The shielding structure (5) includes a connecting shell (51), a shielding ring (52) is slidably nested on the outer wall of the connecting shell (51), and an electric push rod (53) is installed on the connecting shell (51). The electric push rod (53) is used to drive the shielding ring (52) to move so as to shield the detection component below.

6. The container thermal spraying equipment according to claim 4, characterized in that: The detection component is a cylindrical second detection structure (8), and an electric slide rail (82) is installed between the second detection structure (8) and the shielding structure (5). The electric slide rail (82) is used to drive the second detection structure (8) to rotate around its axis. The outer wall of the second detection structure (8) is equipped with an optical component (83) and a photodetector (84) from top to bottom. The bottom of the second detection structure (8) is equipped with a second gas sensor (85), and the second gas sensor (85) is connected to a detection tube (851).

7. A container thermal spraying device according to claim 2, characterized in that: The rotary motor (21) is set with a rotation base point, and its maximum angle for a single rotation is 180°.

8. A container thermal spraying device according to claim 6, characterized in that: The second detection structure (8) is equipped with an electric slip ring (81) on top for connecting various types of lines; the opening of the detection tube (851) faces the opposite direction to the air outlet of the guide tube (342).

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