Closed automatic surface treatment production line

Abstract

The invention relates to a closed type automatic surface treatment production line which comprises a control system, a rack and a treatment tank arranged in the length direction of the rack, the treatment tank comprises a plurality of reaction tanks and cleaning tanks which are arranged at intervals, and the closed type automatic surface treatment production line further comprises a sealing shell installed at the top of the rack and a fresh air system. The sealing shell comprises a metal framework, a corrosion-resistant coating piece coated on the metal framework and a sealing plate for connecting the metal framework and forming a closed structure; the sealing shell seals the space at the top of the treatment tank and forms a channel for the walking system to walk; the fresh air system comprises an air supply pipeline arranged at the top of one side of the sealing shell, and an air collecting cover and an air exhaust pipeline which are arranged on the other side of the sealing shell, and an air exhaust opening of the air exhaust pipeline communicates with the reaction tank and is used for exhausting waste gas during workpiece immersion treatment; and the air collecting cover is positioned above the reaction tank, is connected with the exhaust pipeline and is used for exhausting the waste gas escaping into the closed space. The device has the effect of avoiding leakage of corrosive gas.

Description

Technical Field

[0001] The present application relates to the field of automated surface treatment production lines, and in particular to a closed automated surface treatment production line. Background Art

[0002] The existing automated corrosion production line includes a frame, a plurality of processing tanks arranged along the length direction of the frame, and a walking system that drives the workpiece to be processed to move along the length direction of the frame. The processing tanks include a reaction tank containing a liquid for chemically reacting with the workpiece to be processed and a cleaning tank containing clean water. The reaction tank and the cleaning tank are arranged at intervals to flush out the liquid in the previous processing tank attached to the workpiece to be processed.

[0003] At present, most of the surface treatment production lines on the market adopt open or semi-open design. The semi-open design encloses the entire surface treatment production line in a relatively closed space, and performs directional exhaust and fresh air supply in this space. However, even if the automatic slot cover system is applied, there will still be corrosive exhaust gas spreading in the closed space, corroding the metal parts in the closed space, such as cylinders, valves, water pumps, motor sealing structures, etc. Summary of the invention

[0004] In order to reduce the corrosion of the system itself by corrosive gases and also reduce the escape of corrosive gases, the present application provides a closed automatic surface treatment production line.

[0005] A closed automatic surface treatment production line, comprising a control system, a frame, and a treatment tank arranged on the frame and along the length direction of the frame, wherein the treatment tank comprises a plurality of reaction tanks and cleaning tanks arranged at intervals, and characterized in that: it also comprises a sealed shell installed on the top of the frame and a fresh air system for ventilation and exhaust arranged in the sealed shell; A closed space for sealing a certain space above the treatment tank is formed in the sealed shell, and the sealed shell includes a metal frame, a corrosion-resistant coating member coated on the metal frame, and a sealing plate connecting the metal frame to form a closed structure; The fresh air system includes an air supply pipeline arranged on the top of one side of the sealed shell and an air collecting hood and an exhaust pipeline arranged on the other side of the sealed shell. Each of the reaction tanks is connected to the exhaust pipeline through an exhaust pipe to discharge the exhaust gas when the workpiece is immersed in the treatment. The air collecting hood is located above the reaction tank and is connected to the exhaust pipeline to discharge the exhaust gas escaping into the enclosed space.

[0006] By adopting the above technical solution, the sealed shell is directly fixed on the top of the frame to seal the tank body and the workpiece transfer channel on the top of the tank body, forming a closed space. Corrosive gases can only diffuse in this space. The easily corrosive parts of the surface treatment line, such as metal parts, such as cylinders, valves, water pumps, and motors, are all set outside this closed environment to avoid corrosion of easily corrosive parts; a fresh air system is set in the closed space to solve the problem of corrosive gas diffusion, so as to facilitate the timely discharge of corrosive gases diffused into the closed space, and avoid the corrosion of the frame and various parts of the automated production line by corrosive gases. Specifically, when the workpiece is immersed in the reaction tank for chemical reaction, the corrosive gas generated by the reaction is discharged from the exhaust pipeline. When the workpiece moves in the closed space, the wind hood is started to suck air to avoid the volatilization of the reaction solution attached to the workpiece, which further causes the corrosive gas to corrode the sealed shell, and the corrosive gas escaping into the closed space is discharged.

[0007] Preferably, the sealing plate includes a visible window arranged on at least one side, an opening and closing door movably arranged at one end of the sealing shell, and a plastic plate. The opening and closing door is controlled by a control system to realize automatic opening and closing. The exhaust pipeline and the wind collecting hood are arranged on the opposite side of the visible window, and the top of the treatment tank is covered with a corrosion-resistant covering.

[0008] By adopting the above technical solution and setting a visual window, the situation of the automated production line inside the sealed shell can be directly observed through the visual window, thereby reducing the need for manual entry into the closed production line for observation, ensuring the airtightness of the production line and reducing the overflow of corrosive gases.

[0009] Preferably, the notch of the reaction groove is provided with an openable and closable cover plate, and the cover plate is opened when the workpiece moves to the top of the corresponding reaction groove.

[0010] By adopting the above technical solution, by adding an automatically opening and closing cover at the notch of the reaction tank, when the workpiece needs to react in the reaction tank, the cover of the reaction tank is automatically opened, and the covers of the remaining reaction tanks remain closed, thereby reducing the overflow of corrosive gases and slowing down the corrosion of the sealed shell and the processing tank.

[0011] Preferably, the air supply pipeline is provided with a plurality of air supply ports corresponding to the processing tanks and a first control valve for controlling the on and off of each of the air supply ports, and the first control valve is used to open when the workpiece is immersed in the corresponding reaction tank.

[0012] By adopting the above technical solution, when the workpiece is immersed in one of the reaction tanks, the corresponding first control valve is opened, so that fresh air is sent into the enclosed space and the reaction tank through the air supply pipeline, ensuring targeted air supply, thereby increasing the air supply volume in each reaction tank.

[0013] Preferably, a plurality of the wind collecting hoods are arranged at intervals in the enclosed space, a second control valve is installed on each of the exhaust pipes, and a third control valve connected to the control system is provided on each of the wind collecting hoods; When the workpiece is immersed in the corresponding reaction tank, the second control valve is opened and the third control valve is closed; When the workpiece is lifted into the enclosed space, the second control valve is closed and the third control valve is opened.

[0014] By adopting the above technical solution, the opening and closing of the fresh air system is intelligently opened and closed corresponding to the position of the workpiece. When the workpiece undergoes a chemical reaction in the reaction tank, the control system controls the first control valve and the second control valve corresponding to the reaction tank to open, and the third control valve to close, and to send flowing fresh air into the reaction tank to discharge the generated corrosive gas from the exhaust pipeline; after the workpiece is lifted by the walking system, the cover of the reaction tank is automatically closed, the first control valve and the third control valve are opened, and the second control valve is closed, so as to suck and discharge the corrosive gas diffused into the sealed space.

[0015] Preferably, the height of the air collecting hood arranged on the side of the reaction tank with a higher tank liquid temperature is higher than the height of the air collecting hood on the side of the reaction tank with a lower tank liquid temperature.

[0016] By adopting the above technical scheme, the temperature of the tank liquid in the reaction tank directly affects the diffusion performance of the corrosive gas. When the temperature of the tank liquid in the reaction tank is high, the generated corrosive gas is more easily diffused. Therefore, the height of the wind collecting hood is set according to the temperature of the tank liquid, which is convenient for improving the suction and discharge effect of the corrosive gas and reducing the corrosion of the corrosive gas to the sealed shell.

[0017] Preferably, it comprises a walking system for walking above the processing tank, and the walking system comprises a guide rail system and a vehicle body; The guide rail system includes a horizontal guide rail arranged on the top of the sealed shell and a guide frame connected to the vehicle body and extending in the height direction, wherein the guide frame is arranged on the front and rear sides of the vehicle body and moves with the vehicle body; The vehicle body includes a bracket, a walking component arranged on the bracket for walking along the horizontal guide rail, a grabbing member, and a guide member connected to the grabbing member for sliding along the guide frame. The bracket is provided with a lifting component for controlling the lifting and lowering of the grabbing member.

[0018] By adopting the above technical solution, the walking component drives the vehicle body and the guide frame to slide along the horizontal guide rail, and the lifting component drives the grabbing member to slide along the guide frame, thereby driving the workpiece to rise and fall. The guide frame and the vehicle body are designed as an integrated whole and are arranged behind the grabbing member, thereby reducing the space occupied on both sides of the production line and reducing the volume of the closed automated production line.

[0019] Preferably, a liquid receiving pan which can slide in a direction perpendicular to the guide frame is provided at the bottom of the vehicle body, and the liquid receiving pan is used to slide out to under the workpiece after the lifting assembly drives the workpiece to rise.

[0020] By adopting the above technical solution, by arranging an automatically sliding liquid receiving tray at the bottom of the grasping member, after the workpiece is lifted, the liquid receiving tray automatically slides to the bottom of the workpiece to catch the dripping chemical liquid, thereby avoiding contamination of the tank liquid in other reaction tanks; when the lifting component drives the workpiece to descend, the liquid receiving tray automatically slides to its original position, avoiding affecting the movement of the workpiece.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. This application sets a sealed shell outside the production line so that the chemical reaction of the workpiece is completely carried out in a closed space. At the same time, the metal frame is wrapped with a corrosion-resistant coating. On the basis of ensuring the supporting performance of the sealed shell, the corrosion performance of the sealed shell is guaranteed. By setting a fresh air system, different ventilation channels are used when the workpiece reacts and when the workpiece moves in the sealed space to ensure the circulation of air in the sealed space and reduce the corrosion of the corrosive gas to the sealed shell and the frame; 2. By integrating the guide frame for guiding the vehicle body with the vehicle body, the vehicle body and the guide frame move together when moving horizontally, and there is no need to arrange the guide frame on both sides of the production line, thus reducing the space occupied on both sides of the production line and reducing the overall volume of the production line; 3. A liquid receiving tray is slidably provided at the bottom of the gripping member. When the workpiece is lifted, the liquid receiving tray automatically moves to the bottom of the workpiece to catch the chemical liquid dripping from the workpiece, thereby preventing the chemical liquids in different reaction tanks from contaminating each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of a closed automatic surface treatment production line of the present invention.

[0023] Figure 2 It is a side view of a closed automatic surface treatment production line of the present invention.

[0024] Figure 3 It is a schematic diagram of a closed type automatic surface treatment production line of the present invention with the sealing plate hidden.

[0025] Figure 4 It is a schematic layout diagram of a fresh air system of a closed automatic surface treatment production line of the present invention.

[0026] Figure 5 It is a schematic diagram of the overall structure of the vehicle.

[0027] Figure 6 This is a schematic diagram of the arrangement of the cleaning tank using the countercurrent rinsing method.

[0028] Explanation of reference numerals: 1. rack; 2. sealed shell; 21. metal frame; 22. sealing plate; 23. visual window; 24. opening and closing door; 25. enclosed space; 3. fresh air system; 32. air supply pipeline; 33. exhaust pipeline; 34. air collecting hood; 35. second control valve; 36. third control valve; 4. treatment tank; 41. reaction tank; 42. cleaning tank; 5. cover plate; 6. guide rail system; 61. horizontal guide rail; 611. rack; 62. guide frame; 7. vehicle body; 71. bracket; 8. walking assembly; 81. walking wheel; 811. gear; 82. drive Parts; 821, horizontal travel reduction motor; 822, coupling; 83, grabbing part; 831, support plate; 832, hook; 84, guide part; 841, guide roller; 9, lifting assembly; 91, lifting sling; 92, winch drum; 93, lifting reduction motor; 10, liquid collection tray; 11, sliding part; 111, mobile motor; 112, synchronous belt; 12, translation frame; 13, drain pipe; 14, pneumatic diaphragm valve; 15, sprinkler head; 16, table; 17, installation gap; 18, water distribution pipeline; 19, walking tooling vehicle; 20, telescopic step platform. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-6 This application is described in further detail.

[0030] The present application embodiment discloses a closed type automated surface treatment production line. Figure 1-Figure 4 The closed automatic surface treatment production line includes a control system, a frame 1, a sealed shell 2 installed on the top of the frame 1 and forming a closed space with the frame 1, a walking system arranged in the sealed shell 2 and walking along the production line direction, and a fresh air system 3 for ventilation and exhaust. A number of treatment tanks 4 are arranged along the length direction of the frame 1. The treatment tanks 4 include a number of reaction tanks 41 containing reaction solutions for chemically reacting with the workpiece to be treated and a number of cleaning tanks 42 containing clean water. The reaction tanks 41 and the cleaning tanks 42 are arranged at intervals to clean the reaction solution attached to the surface of the workpiece after a chemical reaction to avoid affecting the next reaction.

[0031] The walking system drives the workpiece to walk in the enclosed space between the sealed shell 2 and the top of the processing tank 4, so that the corrosive gas generated during the workpiece processing is enclosed in the enclosed space and discharged through the fresh air system 3.

[0032] Reference Figure 3 , Figure 4The sealed shell includes a metal frame 21, a corrosion-resistant coating wrapped on the metal frame 21, and a sealing plate 22 that connects the metal frame 21 and forms a closed structure. The sealed shell 2 forms a certain space above the processing tank 4 into a closed space, and a passage for the walking system to walk is formed in the closed space. The metal frame 21 is a grid-shaped rectangular parallelepiped frame formed by a plurality of carbon steel pipes, and a corrosion-resistant coating is coated on the outside of each carbon steel pipe. This application is described by taking the corrosion-resistant coating as a polypropylene sheet (PP sheet) as an example. In order to realize the visualization of the automated production line, reduce the frequency of the staff entering the production line to check the working conditions, and thus reduce the probability of the staff being harmed by corrosive gas, the sealing plate 22 of this application includes a visual window 23 arranged at least on one side, an opening and closing door 24 movably arranged at one end of the sealed shell 2, and a plurality of plastic plates. The bracket for placing the workpiece to be processed is placed at one end where the opening and closing door 24 is provided, and the opening and closing door 24 is controlled by the control system to realize automatic opening and closing. The sealed housing 2 is provided with a detection member for detecting whether a workpiece has entered. When the walking system grabs the workpiece from the bracket and brings the workpiece into the sealed housing 2, the detection member detects the movement of the workpiece and transmits a signal to the control system, and the control system controls the opening and closing door 24 to close so that a closed space is formed inside the sealed housing 2. The detection member for realizing the detection of the movement of the workpiece can be various inductive sensors or a camera.

[0033] Reference Figure 3 and Figure 4The fresh air system 3 includes an air supply line 32 arranged at the top of one side of the sealed shell 2, and an air collecting hood 34 and an exhaust line 33 arranged at the other side of the sealed shell 2. The exhaust line 33 and the air collecting hood 34 are arranged on the opposite side of the visual window 23, and the top of the processing tank 4 is paved with corrosion-resistant coverings. The exhaust port of the exhaust line 33 is connected to the reaction tank 41, and the end of the exhaust line 33 is connected to the exhaust gas collection system. The air collecting hood 34 is located above the processing tank 4 and is connected to the exhaust line 33. A first control valve is provided on the air supply line 32, a second control valve 35 is provided at the air outlet of the exhaust line 33, and a third control valve 36 connected to the control system is provided on the air collecting hood 34. When the workpiece is immersed in the reaction tank 41, the first control valve and the second control valve 35 are opened, and the third control valve 36 is closed, and the air supply line 32 supplies air to the reaction tank 41, so that the corrosive gas in the reaction tank 41 passes through the air outlet and is discharged from the exhaust line 33. When the walking system pulls the workpiece out of the reaction tank 41 after the reaction is completed and drives the workpiece to move in the confined space, the first control valve and the third control valve 36 are opened, and the second control valve 35 is closed, and the corrosive gas volatilized by the workpiece in the confined space enters the exhaust line 33 through the suction effect of the air collecting hood 34, thereby discharging the waste gas. The fresh air system 3 can not only discharge the corrosive gas generated when the workpiece undergoes a chemical reaction, but also discharge the corrosive gas volatilized into the confined space during the walking process of the workpiece.

[0034] Furthermore, a cover plate 5 that can be opened and closed automatically is provided at the notch of each reaction tank 41 and each cleaning tank 42. When the walking system drives the workpiece to the top of the corresponding reaction tank 41 / cleaning tank 42, the control system controls the cover plate 5 to open automatically, and at the same time, the cover plate 5 on the previous adjacent reaction tank 41 / cleaning tank 42 is automatically closed to reduce the overflow of corrosive gas in the reaction tank 41 and slow down the corrosion of the sealed housing 2 and the frame 1 by the corrosive gas. In the present application, the cover plates 5 at the notch of the reaction tank 41 / cleaning tank 42 include two relatively arranged cover plates 5, and the opening and closing of the two cover plates 5 are controlled by a telescopic cylinder.

[0035] In order to save energy, the exhaust in the processing tank 4 and the exhaust in the enclosed space are not always open, but are selectively opened according to the reaction process of the workpiece and the position of the workpiece. Specifically, a plurality of air supply ports are provided on the air supply pipeline 32 corresponding to the reaction tank 41, and a first control valve for controlling the air supply of the air supply port is provided at each air supply port, and multiple exhaust pipelines and air collecting hoods 34 are also designed corresponding to the reaction tank 41, and a second control valve 35 is provided at the exhaust port of each exhaust pipeline, and a third control valve 36 is provided on each air collecting hood 34.

[0036] Furthermore, the height of the air collecting hood 34 corresponding to different reaction tanks 41 is designed according to the tank liquid temperature in the reaction tank 41. Specifically, when the tank liquid temperature in the reaction tank 41 corresponding to the air collecting hood 34 is high, the corrosive gas volatilizes more and in a wider range, so the height of the air collecting hood 34 should be designed to be high; conversely, when the tank liquid temperature in the reaction tank 41 corresponding to the air collecting hood 34 is low, the corrosive gas volatilizes relatively less and in a smaller range, so the height of the air collecting hood 34 should be designed to be low, so as to discharge the corrosive gas in time before it spreads to a wider range.

[0037] Reference Figure 5 , the travel system includes a guide rail system 6 and a vehicle body 7. The vehicle body 7 is used to move horizontally or vertically along the guide rail system 6. The guide rail system 6 includes a horizontal guide rail 61 arranged on the top of the sealed housing 2 and a guide frame 62 connected to the vehicle body 7 and extending in the height direction. The guide frame 62 is arranged on the front and rear sides of the vehicle body 7 and moves with the vehicle body 7. The vehicle body 7 can move in the vertical direction along the guide frame 62 to achieve the immersion and lifting of the workpiece. The guide frame 62 is arranged on the front side or the rear side or the front and rear sides of the vehicle body 7 in the direction of travel to avoid occupying the space on both sides of the production line, which is convenient for arrangement in a small space. The vehicle body 7 includes a bracket 71, a travel assembly 8 arranged on the bracket 71 for walking along the horizontal guide rail 61, a gripper 83 for combining with the workpiece, and a guide member 84 for sliding along the guide frame 62. A lifting assembly 9 for controlling the gripper 83 to perform lifting and lowering actions is also installed on the bracket 71.

[0038] Reference Figure 5 Specifically, the travel assembly 8 includes four travel wheels 81 disposed at the four corners of the bracket 71 for contacting the I-shaped grooves of the horizontal guide rail 61 and a driving member 82 for driving the travel wheels 81 to rotate. In the present application, the driving member 82 uses a horizontal travel reduction motor 821 and a coupling 822 to drive the two travel wheels 81 located in front of the vehicle body 7 to rotate, and the two travel wheels 81 located behind the vehicle body 7 follow the movement, saving power. In order to travel, a gear 811 is fixed to the outer side of the two travel wheels 81 on the front side, and a rack 611 for meshing with the gear 811 is disposed along the length direction of the horizontal guide rail 61 to prevent the vehicle body 7 from falling.

[0039] The grabbing member 83 includes a support plate 831 and a hook 832 fixed below the support plate 831 for hooking the workpiece. The lifting assembly 9 includes a hoisting drum 92 wound with a lifting belt 91 and a lifting reduction motor 93 driving the hoisting drum 92 to rotate. The end of the lifting belt 91 is fixed to the support plate 831, and there are two hoisting drums 92 on both sides of the support plate 831 to drive the grabbing member 83 to lift stably.

[0040] The guide member 84 uses a guide roller 841 installed on the support plate 831 for sliding along the guide frame 62 to limit the up and down lifting action of the workpiece.

[0041] After the workpiece is lifted, the chemical liquid attached to it will drip downward under the action of gravity, because the bottom of the vehicle body 7 of the present application is also provided with a liquid receiving tray 10 that can slide in a direction perpendicular to the guide frame 62. The liquid receiving tray 10 is used to slide to the bottom of the workpiece after the lifting component 9 drives the workpiece to rise, so as to catch the dripping chemical liquid and avoid mixing of the chemical liquids in different reaction tanks 41.

[0042] Reference Figure 5 In the present application, a translation frame 12 having a sliding member 11 and extending perpendicularly to the guide frame 62 is installed at the bottom of the guide frame 62. The translation frame 12 is a square frame, and a liquid receiving tray 10 is provided on the inner side of the translation frame 12. The liquid receiving tray 10 is driven by the sliding member 11 to slide along the extension direction of the translation frame 12. Specifically, the sliding member 11 includes a moving motor 111 installed on one side of the moving frame, a synchronous belt 112 wheel installed on the output shaft of the moving motor 111, and a synchronous belt 112 installed on the synchronous belt 112 wheel, and the liquid receiving tray 10 is fixedly connected to the synchronous belt 112.

[0043] Furthermore, the liquid receiving tray 10 is provided with a drain pipe 13 connected to the waste liquid barrel, and the drain pipe 13 is provided with a pneumatic diaphragm valve 14. When the waste liquid in the liquid receiving tray 10 reaches a preset liquid level, the pneumatic diaphragm valve 14 is automatically opened under the control of the control system.

[0044] Furthermore, a traveling tooling vehicle 19 for placing workpieces is provided at the inlet end of the production line, namely, at the end close to the opening and closing door 24 .

[0045] Reference Figure 2 and Figure 6, the present application sets a countercurrent rinsing device for cleaning to reduce the amount of water changed in the cleaning tank 42. Specifically, at least two cleaning tanks 42 are set between two adjacent reaction tanks 41, and the workpiece passes through the two cleaning tanks 42 in sequence, and the liquid level in the cleaning tank 42 located upstream of the workpiece is lower than the liquid level in the cleaning tank 42 located downstream of the workpiece. The liquid level in the cleaning tank 42 located downstream of the workpiece is sufficient to overflow the liquid in the tank into the previous adjacent cleaning tank 42 when the workpiece is placed. Thereby achieving the purpose of reducing the amount of water changed in the previous cleaning tank 42 and saving more water. The present application takes the example of three cleaning tanks 42 between two adjacent reaction tanks 41 for explanation. Furthermore, a recovery tank is also provided between the cleaning tank 42 located upstream of the workpiece and the reaction tank 41, and the liquid overflowing from this cleaning tank 42 flows into the recovery tank. In addition, a concentration detector for detecting the concentration of the liquid is also provided in the cleaning tank 42. When the concentration detector detects that the concentration of the liquid in the cleaning tank 42 reaches a threshold value, a signal is sent to the control system to remind the staff to change the water in time.

[0046] Preferably, a spray head 15 is provided at the notch of the cleaning tank 42 located downstream of the workpiece, and the spray head 15 is connected to an external water source and is controlled on and off by a solenoid valve connected to a control system. A plurality of spray heads 15 are arranged at intervals along the tank width direction of the cleaning tank 42, and each group of multiple spray heads 15 is connected to an external water source through a water distribution pipe 18. In order to ensure the cleanliness of the production line, a layer of PP board with anti-corrosion properties is also laid on the top surface of the processing tank 4 to form a table 16. And an installation gap 17 is formed between the table 16 and the top of each processing tank 4, and various pipelines including water distribution pipelines are arranged in the installation gap 17. Furthermore, in order to improve the rinsing effect on the workpiece, an ultrasonic generator for generating ultrasonic waves is installed in each cleaning tank 42.

[0047] The closed automatic surface treatment production line of the present application also includes a telescopic stepping platform 20 arranged on one side of the visual window 23. The telescopic stepping platform 20 extends along the length direction of the production line and can be retracted, so that when the production line is working, the worker stands on the telescopic stepping platform 20 to observe the situation inside the production line; when the production line stops working, the telescopic stepping platform 20 can be retracted. Specifically, the telescopic stepping platform 20 includes pedals, guardrails and steps. The pedals are provided with a plurality of blocks and the pedals are arranged in a step-like manner in sequence. When the production is finished, the pedals at both ends are retracted inwardly, so that the pedals are folded in sequence, thereby realizing the retraction of the telescopic stepping platform 20 and saving space.

[0048] The implementation principle of a closed automatic surface treatment production line in the embodiment of the present application is as follows: during operation, the control system controls the opening and closing door 24 to open, and the vehicle body 7 moves along the horizontal guide rail 61 to one end close to the opening and closing door 24, and then the vehicle body 7 slides downward along the guide frame 62 so that the hook 832 hooks the workpiece and then slides upward along the guide frame 62, and moves along the horizontal guide rail 61 to the far end of the automatic production line. When the workpiece enters the interior of the sealed shell 2, the control system controls the opening and closing door 24 to close automatically, so that a closed automatic production line is formed. After that, the walking system drives the workpiece to immerse, lift, clean and walk according to the set program. When the workpiece moves to the top of the reaction tank 41, the cover plate 5 above the reaction tank 41 automatically opens, and the cover plate 5 of the upstream reaction tank 41 automatically closes to reduce the overflow of corrosive gases. Then the lifting assembly 9 makes the workpiece descend along the guide frame 62 and immerse it in the reaction tank 41. Then the air supply port on the air supply line 32 corresponding to the reaction tank 41 is opened, and the second control valve 35 is opened to send fresh air into the reaction tank 41, and the waste gas is discharged through the exhaust line 33. After the reaction is completed, the lifting assembly 9 drives the workpiece to move upward along the guide frame 62. While moving upward, the second control valve 35 is closed, and the third control valve 36 on the air collecting hood 34 is opened to suck the corrosive gas emitted into the enclosed space to the outside to ensure the cleanliness of the enclosed space. The PP plate outside the metal frame 21 can greatly reduce the corrosion of the internal metal frame 21 by the corrosive gas.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A closed automatic surface treatment production line, comprising a control system, a frame (1), and a treatment tank (4) arranged on the frame (1) and arranged along the length direction of the frame (1), wherein the treatment tank (4) comprises a plurality of reaction tanks (41) and cleaning tanks (42) arranged at intervals, characterized in that: It also includes a sealed housing (2) installed on the top of the frame (1) and a fresh air system (3) for ventilation and exhaust arranged in the sealed housing; A closed space is formed in the sealed housing (2) for sealing a certain space above the treatment tank (4), and the sealed housing (2) comprises a metal frame (21), a corrosion-resistant coating member coated on the metal frame (21), and a sealing plate (22) connecting the metal frame (21) to form a closed structure; The fresh air system (3) comprises an air supply pipeline (32) arranged at the top of one side of the sealed shell (2) and an air collecting hood (34) and an exhaust pipeline (33) arranged at the other side of the sealed shell (2); each of the reaction tanks (41) is connected to the exhaust pipeline (33) through an exhaust pipe so as to discharge waste gas when the workpiece is immersed in the treatment; the air collecting hood (34) is located above the reaction tank (41) and is connected to the exhaust pipeline (33) for discharging waste gas escaping into the enclosed space.

2. The closed automatic surface treatment production line according to claim 1 is characterized in that: The sealing plate (22) comprises a visible window (23) arranged at least on one side, an opening and closing door (24) movably arranged at one end of the sealing shell (2), and a plastic plate, wherein the opening and closing door (24) is controlled by a control system to realize automatic opening and closing, the exhaust pipe (33) and the air collecting hood (34) are arranged on the opposite side of the visible window (23), and the top of the treatment tank (4) is paved with a corrosion-resistant covering.

3. The closed automatic surface treatment production line according to claim 1 is characterized in that: The notch of the reaction groove (41) is provided with an openable and closable cover plate (5), and the cover plate (5) is opened when the workpiece moves to the top of the corresponding reaction groove (41).

4. The closed automatic surface treatment production line according to claim 1 is characterized in that: The air supply pipeline (32) is provided with a plurality of air supply ports corresponding to the processing tank (4) and a first control valve for controlling the on and off of each of the air supply ports. The first control valve is used to open when the workpiece is immersed in the corresponding reaction tank (41).

5. The closed automatic surface treatment production line according to claim 1 is characterized in that: A plurality of the wind collecting hoods (34) are arranged at intervals in the enclosed space, a second control valve (35) is installed on each of the exhaust pipes, and a third control valve (36) connected to the control system is provided on each of the wind collecting hoods (34); When the workpiece is immersed in the corresponding reaction tank (41), the second control valve (35) is opened and the third control valve (36) is closed; When the workpiece is lifted into the enclosed space, the second control valve (35) is closed and the third control valve (36) is opened.

6. The closed automatic surface treatment production line according to claim 4 is characterized in that: The height of the air collecting hood (34) arranged on the side of the reaction tank (41) with a higher tank liquid temperature is higher than the height of the air collecting hood (34) on the side of the reaction tank (41) with a lower tank liquid temperature.

7. The closed automatic surface treatment production line according to claim 1 is characterized by: It also includes a walking system for walking above the processing tank, and the walking system includes a guide rail system (6) and a vehicle body (7); The guide rail system (6) comprises a horizontal guide rail (61) arranged on the top of the sealed housing (2) and a guide frame (62) connected to the vehicle body (7) and extending in the height direction, wherein the guide frame (62) is arranged on the front and rear sides of the vehicle body (7) and moves with the vehicle body (7); The vehicle body (7) comprises a bracket (71), a walking assembly (8) arranged on the bracket (71) for walking along the horizontal guide rail (61), a grabbing member (83), and a guide member (84) connected to the grabbing member (83) for sliding along the guide frame (62); and a lifting assembly (9) for controlling the lifting and lowering of the grabbing member (83) is arranged on the bracket (71).

8. The closed automatic surface treatment production line according to claim 7 is characterized in that: The bottom of the vehicle body (7) is provided with a liquid receiving tray (10) which can slide in a direction perpendicular to the guide frame (62), and the liquid receiving tray (10) is used to slide out to the bottom of the workpiece after the lifting component (9) drives the workpiece to rise.

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