Full-pneumatic cleaning equipment for steel mesh and cleaning method of full-pneumatic cleaning equipment

Abstract

The invention provides full-pneumatic cleaning equipment for a steel mesh and a cleaning method of the full-pneumatic cleaning equipment, belongs to the technical field of steel mesh cleaning, and aims to solve the problems that existing cleaning equipment is single in function and not easy to adapt to safe recycling of low-cost solvent type cleaning liquid. Through cooperation of the spraying bin, the spraying rod assembly, the pneumatic diaphragm pump, the pressure regulating filter, the blowing angle seat valve pipe and the like, multifunctional integration of circulating cleaning, drying, liquid adding and liquid discharging is achieved, condensation and recycling of solvent type cleaning liquid are utilized, the overall environment-friendly sustainability of equipment is improved, the side face nozzles, the front face nozzles and the like are utilized, and the cleaning efficiency is improved. 360-degree automatic rotation of the spraying rod assembly body is achieved, so that the working range is enlarged, cleaning dead corners are effectively avoided, the overall structure is simple, disassembly and assembly are convenient, the maintenance cost is low, meanwhile, compressed air fed into the pressure regulating filter is matched with the air control box, and under the pneumatic control mode, the safety of solvent type cleaning liquid in the using process is further improved; and the possibility of burning explosion of the solvent type cleaning fluid is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of stencil cleaning, and particularly to a fully pneumatic cleaning device for a stencil and a cleaning method thereof. Background Art

[0002] In the electronic manufacturing industry, it is often necessary to print solder paste on a PCB for chip mounting and soldering. This process requires the use of a stencil, which is an essential basic item in the SMT (Surface Mount Technology) industry. To eliminate corrosion, prevent electrostatic damage, extend the product's service life, and better meet the ever-increasing requirements of customers for high quality and high reliability, it is necessary to use a cleaning device to effectively clean harmful residues such as flux residues, solder paste, solder balls, impurities, dust, and oil stains on the surface of the stencil.

[0003] Traditional cleaning methods include water-based liquid spray cleaning and ultrasonic cleaning. The advantages of water-based liquid spray cleaning are that the water-based cleaning liquid has good environmental protection, strong cleaning ability, high safety, and high equipment automation. The disadvantages are that the cost of the water-based cleaning liquid and the cleaning equipment is high, and it is generally unaffordable for non-high-value products. Ultrasonic cleaning has potential fire and explosion hazards due to the evaporation of the solution, and ultrasonic waves can damage the adhesive used for fixation in the stencil. Moreover, the noise of ultrasonic waves also causes certain harm to operators. Therefore, for solvent-based cleaning liquids such as industrial alcohol, a cleaning device with a simple structure, strong functionality, and safety and reliability is needed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the problems of single functionality in existing cleaning equipment and the difficulty in adapting to the safe recycling of low-cost solvent-based cleaning liquids. The present invention provides a fully pneumatic cleaning device for a stencil and a cleaning method thereof.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is: a fully pneumatic cleaning device for a stencil, including a device main body. Casters are evenly installed at the bottom end of the device main body. A spray chamber is arranged inside the device main body. A feed chamber door is connected between one side of the spray chamber and the device main body. An exhaust duct penetrates through the top end of the device main body, and one end of the exhaust duct extends into the interior of the spray chamber. An exhaust opening and closing mechanism is arranged outside the exhaust duct. A chute is fixed at the bottom end inside the spray chamber. A positioning bracket is fixed on the side wall of the spray chamber opposite to the feed chamber door. A card seat is movably installed inside the spray chamber. A funnel-shaped reflux groove is arranged at the bottom end inside the spray chamber. A quick connector penetrates through the bottom end of the funnel-shaped reflux groove. Spray rod assemblies are arranged at the centers of two opposite sides of the spray chamber away from the feed chamber door. One ends of the spray rod assemblies located outside the spray chamber are jointly communicated with a U-shaped pipe.

[0006] At the bottom end inside the equipment main body, a cleaning liquid tank is fixed. At the top end of the cleaning liquid tank, a fixed pipe is fixedly penetrated. The top end of the fixed pipe is communicated with the bottom end of a quick connector. On one side of the cleaning liquid tank, a pneumatic diaphragm pump is arranged. A circulating manual ball valve pipe one is communicated between the feeding end of the pneumatic diaphragm pump and the cleaning liquid tank. A liquid adding manual ball valve is communicated on one side of the circulating manual ball valve pipe one. On the side wall of the equipment main body opposite to the cleaning liquid tank, a primary filter and a high-efficiency filter are sequentially fixed. A circulating manual ball valve pipe two is communicated between the discharging end of the pneumatic diaphragm pump and the primary filter. A liquid discharging manual ball valve is communicated on one side of the circulating manual ball valve pipe two. The primary filter and the high-efficiency filter are communicated with each other through a pipeline. The discharging end of the high-efficiency filter is communicated with a U-shaped pipeline through a check valve. On the inner wall of the equipment main body above the pneumatic diaphragm pump, an air control box is fixed. On the inner wall of the equipment main body below the air control box, a pressure regulating filter is fixed. The air inlet end of the pressure regulating filter is communicated with an external air supply device. The air outlet end of the pressure regulating filter is communicated with the U-shaped pipeline through a blowing angle seat valve pipe.

[0007] Preferably, the spray bar assembly includes a fixed shaft body penetrating through the center of the side wall of the spraying chamber. At one end of the fixed shaft body located inside the spraying chamber, a rotating sleeve body is sleeved. At one end of the rotating sleeve body, a sealing cover body is installed. On both sides of the rotating sleeve body, connecting pipe bodies are installed. At one end of each connecting pipe body, a spray bar body is communicated. At the outer ends of the spray bar bodies, outer four-corner plugs are arranged. On the outer sides of the spray bar bodies, front nozzles and side nozzles are evenly arranged. The spraying directions of the front nozzles and the side nozzles are perpendicular to each other. The spraying directions of the upper and lower groups of side nozzles are opposite.

[0008] Preferably, the fixed shaft body includes a tail part. At one end of the tail part, a base bottom plate is fixed. On one side of the base bottom plate close to the tail part, fixed shaft fixing holes are annularly and equidistantly opened. On the other side of the base bottom plate, a fixed shaft base is fixed. On the outer side of the fixed shaft base, a base top plate is fixed. On the side of the base top plate away from the tail part, an end part is fixed. At the front end of the end part, an end plate is fixed. On the end plate, cover fixing threaded holes are annularly and equidistantly opened. At the center of the end plate, an outlet two is opened. On the outer side of the end part, an annular groove is opened. Inside the annular groove, opposite outlets one are opened. At the front end of the tail part, an inlet is opened. The inlet is communicated with the outlet one and the outlet two. On the sealing cover body, cover fixing through holes are annularly and equidistantly opened. The cover fixing through holes and the cover fixing threaded holes are in one-to-one correspondence and connected with bolts. At the center of the sealing cover body, a cover spray hole is opened. The position of the cover spray hole corresponds to the position of the outlet two.

[0009] Preferably, at both ends of the inner wall of the rotating sleeve body, bearing grooves are opened. Inside the bearing grooves, rotating sleeve bearings are clamped. The rotating sleeve body is rotatably sleeved on the end part through the rotating sleeve bearings. On both sides of the rotating sleeve body, rotating sleeve steps are arranged. On the outer walls of the rotating sleeve body away from the rotating sleeve steps, spray bar mounting holes are opened. On the outer sides of the spray bar mounting holes, spray bar connecting steps are fixed.

[0010] Preferably, the connecting pipe body includes a connecting screw rod main body. A connecting screw rod through hole is provided inside the connecting screw rod main body. The outer surface of the connecting screw rod main body is threadedly connected to the inside of the spray rod mounting hole. A connecting pipe mounting step is fixed to the rear end of the connecting screw rod main body. Connecting pipe mounting surfaces are provided on both sides of the connecting pipe mounting step. A spray rod threaded hole is provided inside the connecting pipe mounting step. The spray rod threaded hole communicates with the connecting screw rod through hole.

[0011] Preferably, a spray rod screw rod main body is fixed to the front end of the spray rod body. The outer surface of the spray rod screw rod main body is threadedly connected to the inside of the spray rod threaded hole. A spray rod screw rod through hole runs through between the spray rod screw rod main body and the spray rod body. Positive threaded holes and side threaded holes are evenly provided on the side wall of the spray rod screw rod through hole. One end of the positive nozzle is threadedly connected to the inside of the positive threaded hole. One end of the side nozzle is threadedly connected to the inside of the side threaded hole. A top threaded hole is provided at the rear end of the spray rod body. The outer surface of the outer four-corner plug is threadedly connected to the inside of the top threaded hole. Two oppositely arranged spray rod mounting steps are provided at a position on the outer surface of the spray rod body close to the top threaded hole.

[0012] Preferably, the exhaust air pipe includes an exhaust lower pipe connecting the top end of the connecting device main body and the bottom end of the spray chamber. One side of the exhaust lower pipe communicates with an exhaust upper pipe. One end of the exhaust upper pipe is connected to the top end of the spray chamber. The exhaust air opening and closing mechanism is located below the connection between the exhaust lower pipe and the exhaust upper pipe. The exhaust air opening and closing mechanism includes a switch box provided outside the exhaust lower pipe. A travel window communicating with the exhaust lower pipe is provided on the switch box. A switch plate is slidably installed inside the travel window. A connecting block is welded to one side of the top end of the switch plate. One end of the connecting block is welded to a push rod. One end of the push rod penetrates to the outside of the exhaust lower pipe. An installation bracket one is fixed to the outer wall of the spray chamber. A bracket strip hole is provided in the installation bracket one. A locking member is installed inside the bracket strip hole. A cylinder main body is fixed inside the locking member. The telescopic end of the cylinder main body is threadedly connected to a connecting member. One end of the connecting member is threadedly connected to the outer end of the push rod. An installation bracket two is fixed to one side of the top end of the switch box. The front end of the cylinder main body runs through and is connected to the inside of the installation bracket two.

[0013] Preferably, a filter box is installed at the bottom end of the fixed pipe. Two oppositely arranged upper slot plates are installed at the top end of the filter box. A plurality of lower fixing holes run through between the upper slot plates and the filter box. An upper insertion plate is fixedly sleeved at the bottom end of the fixed pipe. The upper insertion plate is horizontally inserted into the inside of the two upper slot plates. A plurality of upper fixing holes run through between the upper slot plates and the upper insertion plate. A liquid tank cover is rotatably connected to one side of the top end of the cleaning liquid tank. A sealing strip is fixed to the opening of the cleaning liquid tank below the liquid tank cover. Two parallel spring buckles are fixed to the outside of the cleaning liquid tank. The top end of the spring buckle is clamped to one side of the liquid tank cover. A liquid level display pipe is provided on the side wall of the cleaning liquid tank.

[0014] Preferably, an outer wall of the equipment main body on one side of the feed bin door is provided with a control panel, on which a gas source indicator light, a door indicator light, a start button, a cleaning time timer, a drying time timer, and an emergency stop button are sequentially arranged. A pressure switch is installed on one side of the feed bin door of the spray bin. An air control box is fixed to the inner side wall of the equipment main body. The pressure regulating filter is pneumatically connected to the air inlet of the air control box through a pipeline. The air control box is pneumatically connected to the driving air ports of the blowing angle seat valve pipe, the cylinder main body, and the pneumatic diaphragm pump through pipelines. The input end of the pressure regulating filter is electrically connected to the air control box. The output end of the pressure switch is electrically connected to the emergency stop button. The output ends of the emergency stop button, the cleaning time timer, and the drying time timer are all electrically connected to the door indicator light. The cleaning time timer and the drying time timer are connected in parallel. The output ends of the door indicator light and the start button are both electrically connected to the air control box. The output end of the air control box is respectively electrically connected to the pneumatic diaphragm pump, the gas source indicator light, the cylinder main body, and the blowing angle seat valve pipe.

[0015] Another technical solution proposed by the present invention: provides a cleaning method for a fully pneumatic cleaning device for a steel mesh, including the following implementation steps:

[0016] S1: Push the steel mesh from the feed bin door into the interior of the spray bin, so that the bottom end of the steel mesh slides along the chute, and the innermost side is fixed by the positioning bracket, and the top end is fixed by the clamping seat;

[0017] S2: During cleaning, close the feed bin door, set the cleaning and drying times through the control panel, and press the start button. At this time, the circulating manual ball valve pipe 1 and the circulating manual ball valve pipe 2 are in the open state, and the liquid adding manual ball valve and the liquid discharging manual ball valve are in the closed state. The pneumatic diaphragm pump is started, so that the solvent-based cleaning liquid in the cleaning liquid tank is transmitted to the U-shaped pipeline along the circulating manual ball valve pipe 1, the pneumatic diaphragm pump, the circulating manual ball valve pipe 2, the coarse filter, the fine filter, and through the one-way valve, and under the action of the fixed shaft bodies on both sides in the spray bin, it is sprayed out through the sealing cover spray holes, the front nozzles, and the side nozzles. The spraying of the front and back sides of the steel mesh is realized by the action of the sealing cover spray holes and the front nozzles. Since the spraying direction of the side nozzles is perpendicular to that of the front nozzles, the spraying force generates a perpendicular radial driving force on the spray rod body, causing the spray rod body to rotate around the fixed shaft body, so as to realize the self-rotating spraying effect on the front and back sides of the steel mesh;

[0018] S3: During the cleaning process, the cylinder body extends to block the stroke window with the switch plate, thereby blocking the exhaust port of the exhaust downpipe to condense and reflux the solvent-based cleaning liquid volatilized from the bottom end of the spray chamber, reducing waste. Meanwhile, the solvent-based cleaning liquid volatilized near the feed bin door is discharged to improve the safety of the feed bin door position. At the same time, the solvent-based cleaning liquid flows along the funnel reflux trough after being cleaned by the steel mesh, and successively passes through the quick connector and the fixed pipe into the filter box. The large-particle impurities in the solvent-based cleaning liquid are intercepted by the filter screen on the filter box to prevent the solvent-based cleaning liquid from carrying impurities during the circulating cleaning process of the pneumatic diaphragm pump;

[0019] S4: After the cleaning is completed, start the drying program. The pneumatic diaphragm pump is automatically closed by the air control box, so that the compressed air of the external air supply equipment enters the U-shaped pipe through the pressure regulating filter and the air blowing angle seat valve pipe. The compressed air enters the fixed shaft body and is sprayed out through the cover spray holes, the front nozzle and the side nozzle. The compressed air jets and dries the solvent-based cleaning liquid on the surface of the steel mesh through the cover spray holes and the front nozzle. Using the jet power of the side nozzle, the spray rod body rotates automatically. At this time, the cylinder body shortens, the stroke window opens, and the compressed air entering the spray chamber is discharged outward through the exhaust downpipe and the exhaust uppipe;

[0020] S5: Use the liquid level display tube to check the content of the solvent-based cleaning liquid in the cleaning liquid tank. When the solvent-based cleaning liquid is insufficient, set the circulating manual ball valve pipe 1 and the drain manual ball valve to close. Insert the hose of the filling manual ball valve into the external solvent-based cleaning liquid bucket, start the pneumatic diaphragm pump, and pass the external solvent-based cleaning liquid through the filling manual ball valve, the pneumatic diaphragm pump, the circulating manual ball valve pipe 2, the coarse filter, the fine filter, and the one-way valve into the spray chamber, and then flow along the funnel reflux trough and enter the cleaning liquid tank through the quick connector for addition. When the solvent-based cleaning liquid in the cleaning liquid tank needs to be replaced, the filling manual ball valve and the circulating manual ball valve pipe 2 can be set to close, and the pneumatic diaphragm pump is started to make the solvent-based cleaning liquid in the cleaning liquid tank pass through the circulating manual ball valve pipe 1 and the pneumatic diaphragm pump and enter the drain manual ball valve for discharge;

[0021] S6: During the cleaning or drying process, when the feed bin door of the spray chamber is opened, the pressure switch is pressed to transmit a signal to the emergency stop button, so that the air control box automatically controls the air blowing angle seat valve pipe and the pneumatic diaphragm pump to close, or directly manually press the emergency stop button to immediately stop the operation of the equipment main body.

[0022] Compared with the prior art, the beneficial effects of the present invention include:

[0023] Through the cooperation of a spray bin, a spray bar assembly, a pneumatic diaphragm pump, a pressure regulating filter, a pneumatic angle seat valve pipe, etc., the functions of circulating cleaning, drying of the stencil, and adding and discharging of the solvent-based cleaning liquid are realized, achieving a multi-functional integrated design. By using the circulation loop between the spray bin, the cleaning liquid tank, the one-way valve, and the exhaust downpipe, the volatilization condensation and recycling of the solvent-based cleaning liquid are realized, improving the overall environmental protection and sustainability of the equipment. By using the functions of the spray bar body, side nozzles, and front nozzles, etc., the 360° automatic rotation of the spray bar body during the cleaning and drying processes is realized, so as to increase the working range and working efficiency, effectively avoiding cleaning dead corners. At the same time, the overall structure of the spray bar assembly is simple, easy to disassemble and assemble, and has low maintenance costs. At the same time, the compressed air introduced through the pressure regulating filter is used in cooperation with the pneumatic control box to control the pneumatic diaphragm pump, the pneumatic angle seat valve pipe, and the cylinder body. Under the pneumatic control mode, the safety of using the solvent-based cleaning liquid is further improved, reducing the possibility of combustion and explosion of the solvent-based cleaning liquid. Brief Description of the Drawings

[0024] The disclosure of the present invention will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0025] Figure 1 Schematically shows a schematic structural diagram of a front view three-dimensional section according to an embodiment of the present invention;

[0026] Figure 2 Schematically shows a schematic structural diagram of a rear view three-dimensional section according to an embodiment of the present invention;

[0027] Figure 3 Schematically shows a schematic three-dimensional structure diagram of a spray bar assembly according to an embodiment of the present invention;

[0028] Figure 4 Schematically shows a schematic structural diagram of the rotation direction of a spray bar assembly according to an embodiment of the present invention;

[0029] Figure 5 Schematically shows a schematic structural diagram of a sectional view of the distribution of a rotating sleeve bearing according to an embodiment of the present invention;

[0030] Figure 6 Schematically shows a schematic front view three-dimensional structure diagram of a fixed shaft body according to an embodiment of the present invention;

[0031] Figure 7 Schematically shows a schematic rear view three-dimensional structure diagram of a fixed shaft body according to an embodiment of the present invention;

[0032] Figure 8Schematically shows a front perspective structural diagram of a rotating sleeve body according to an embodiment of the present invention;

[0033] Figure 9 Schematically shows a rear perspective structural diagram of a rotating sleeve body according to an embodiment of the present invention;

[0034] Figure 10 Schematically shows a three - dimensional structural diagram of a cover body according to an embodiment of the present invention;

[0035] Figure 11 Schematically shows a front perspective structural diagram of a connecting pipe body according to an embodiment of the present invention;

[0036] Figure 12 Schematically shows a rear perspective structural diagram of a connecting pipe body according to an embodiment of the present invention;

[0037] Figure 13 Schematically shows a three - dimensional structural diagram of a spray bar body according to an embodiment of the present invention;

[0038] Figure 14 Schematically shows a three - dimensional structural diagram of an exhaust opening and closing mechanism according to an embodiment of the present invention;

[0039] Figure 15 Schematically shows a three - dimensional structural diagram of the interior of a cleaning liquid tank according to an embodiment of the present invention;

[0040] Figure 16 Schematically shows a structural diagram of the pipeline connection relationship according to an embodiment of the present invention.

[0041] Reference numerals in the figure: 1, equipment main body; 101, spray chamber; 102, gas source indicator light; 103, door indicator light; 104, start button; 105, cleaning time timer; 106, drying time timer; 107, emergency stop button; 108, sliding groove;

[0042] 109, spray bar assembly;

[0043] 1091, fixed shaft body; 109101, tail; 109102, inlet; 109103, fixed shaft base; 109104, base bottom plate; 109105, fixed shaft fixing hole; 109106, base top plate; 109107, end; 109108, outlet one; 109109, annular groove; 109110, end plate; 109111, outlet two; 109112, cover fixing threaded hole;

[0044] 1092. Rotating sleeve body; 109201. Bearing groove; 109202. Spray bar mounting hole; 109203. Spray bar connection step; 109204. Rotating sleeve step;

[0045] 1093. Cover body; 109301. Cover spray hole; 109302. Cover fixing through hole;

[0046] 1094. Connecting pipe body; 109401. Connecting screw main body; 109402. Connecting screw through hole; 109403. Connecting pipe mounting step; 109404. Connecting pipe mounting table surface; 109405. Spray bar threaded hole; 1095. Spray bar body; 109501. Spray bar screw main body; 109502. Spray bar screw through hole; 109503. Front threaded hole; 109504. Spray bar mounting step; 109505. Side threaded hole; 109506. Top threaded hole;

[0047] 1096. Front nozzle; 1097. Outer four - corner plug; 1098. Side nozzle; 1099. Rotating sleeve bearing; 1010. Clamp seat; 1011. Positioning bracket; 1012. Pressure switch; 1013. Funnel reflux groove; 1014. Quick connector;

[0048] 2. Cleaning liquid tank; 201. Fixed pipe; 202. Upper insertion plate; 203. Upper slot plate; 204. Upper fixing hole; 205. Lower fixing hole; 206. Filter box; 207. Liquid level display pipe; 208. Spring buckle; 209. Sealing strip; 2010. Liquid tank cover;

[0049] 3. Circulation manual ball valve pipe one; 4. Pneumatic diaphragm pump; 5. Circulation manual ball valve pipe two; 6. Coarse - efficiency filter; 7. Fine - efficiency filter; 8. Check valve; 9. Exhaust pipe; 901. Exhaust lower pipe; 902. Exhaust upper pipe;

[0050] 10. Exhaust opening and closing mechanism; 1001. Mounting bracket one; 1002. Cylinder main body; 1003. Locking piece; 1004. Mounting bracket two; 1005. Connecting piece; 1006. Push rod; 1007. Connecting block; 1008. Switch box; 1009. Stroke window; 10010. Switch plate; 10011. Bracket strip hole;

[0051] 11. Pressure - regulating filter; 12. Blowing angle seat valve pipe; 13. Filling manual ball valve; 14. Draining manual ball valve; 15. Pneumatic control box; 16. Caster; Detailed implementation method

[0052] It is easy to understand that according to the technical solution of the present invention, without changing the essence of the present invention, those of ordinary skill in the art can propose various interchangeable structural forms and implementation manners. Therefore, the following specific embodiments and the accompanying drawings are only exemplary illustrations of the technical solution of the present invention, and should not be regarded as all of the present invention or as a limitation or restriction on the technical solution of the present invention.

[0053] Embodiment 1

[0054] In order to solve the problems of single functionality in existing cleaning equipment and the difficulty in adapting to the safe recycling of low-cost solvent-based cleaning liquids, the following solutions are disclosed. Specifically, as Figures 1-13 、 Figure 16 shown:

[0055] A fully pneumatic cleaning device for a stencil includes a device main body 1. Casters 16 are evenly installed at the bottom end of the device main body 1. A spray chamber 101 is arranged inside the device main body 1. A feed chamber door is connected between one side of the spray chamber 101 and the device main body 1. An exhaust pipe 9 penetrates through the top end of the device main body 1. One end of the exhaust pipe 9 extends into the interior of the spray chamber 101. An exhaust opening and closing mechanism 10 is arranged outside the exhaust pipe 9. A chute 108 is fixed at the bottom end inside the spray chamber 101. A positioning bracket 1011 is fixed on the side wall of the spray chamber 101 opposite to the feed chamber door. A clamping seat 1010 is movably installed inside the spray chamber 101. A funnel-shaped reflux groove 1013 is arranged at the bottom end inside the spray chamber 101. A quick connector 1014 penetrates through the bottom end of the funnel-shaped reflux groove 1013. Spray bar assemblies 109 are arranged at the centers of two opposite sides of the spray chamber 101 away from the feed chamber door. One ends of the spray bar assemblies 109 located outside the spray chamber 101 are commonly connected to a U-shaped pipe;

[0056] The spray bar assembly 109 includes a fixed shaft body 1091 penetrating through the center of the side wall of the spray chamber 101. A rotating sleeve body 1092 is sleeved at one end of the fixed shaft body 1091 located inside the spray chamber 101. A cover body 1093 is installed at one end of the rotating sleeve body 1092. Connecting pipe bodies 1094 are installed on both sides of the rotating sleeve body 1092. One ends of the connecting pipe bodies 1094 are all connected to a spray bar body 1095. Outer four-corner plugs 1097 are arranged at the outer ends of the spray bar bodies 1095. Front nozzles 1096 and side nozzles 1098 are evenly arranged on the outer sides of the spray bar bodies 1095. The spraying directions of the front nozzles 1096 and the side nozzles 1098 are perpendicular to each other. The spraying directions of the upper and lower groups of side nozzles 1098 are opposite. The positions of the upper and lower groups of front nozzles 1096 are alternately distributed;

[0057] Specifically, as Figure 1 、 Figure 2As shown, the card holder 1010 is composed of two inclined fixed guide rods and an inverted V-shaped clamping block sleeved on the fixed guide rods. When the stencil is pushed inward along the chute 108, the contact between the upper part of the advancing end of the stencil and the inverted V-shaped clamping block enables the inverted V-shaped clamping block to adapt to stencils of different heights, so as to limit the two side edges at the top of the stencil. By virtue of the special distribution of the front nozzles 1096 and the side nozzles 1098, during the cleaning and drying processes, the reaction forces of fluid injection and gas injection can be respectively utilized to achieve the self-rotation of the spray bar body 1095. Since the sizes of the two spray bar bodies 1095 are slightly different and the positions of the two groups of front nozzles 1096 are alternating, when the two rotate synchronously for one week, the injection positions of the two groups of opposite nozzles 1096 do not coincide, thus making the injection coverage area wider. On the one hand, the cleaning range of the solvent-based cleaning liquid is increased under the driving force, reducing the cleaning dead corners. On the other hand, the centrifugal force generated by the driving force is utilized to reduce the residue of the solvent-based cleaning liquid inside the spray bar body 1095. At the same time, high-pressure air injection is used. On the one hand, it improves the downward dripping of the solvent-based cleaning liquid on the stencil. On the other hand, high-pressure heating is utilized to further improve the drying rate after the stencil is cleaned;

[0058] At the bottom end inside the equipment main body 1, a cleaning liquid tank 2 is fixedly installed. The top end of the cleaning liquid tank 2 is fixedly penetrated with a fixed pipe 201. The top end of the fixed pipe 201 is communicated with the bottom end of a quick connector 1014. On one side of the cleaning liquid tank 2, a pneumatic diaphragm pump 4 is arranged. A circulating manual ball valve pipe one 3 is communicated between the feeding end of the pneumatic diaphragm pump 4 and the cleaning liquid tank 2. On one side of the circulating manual ball valve pipe one 3, a liquid adding manual ball valve 13 is communicated. On the side wall of the equipment main body 1 opposite to the cleaning liquid tank 2, a coarse filter 6 and a fine filter 7 are fixedly installed in sequence. A circulating manual ball valve pipe two 5 is communicated between the discharging end of the pneumatic diaphragm pump 4 and the coarse filter 6. On one side of the circulating manual ball valve pipe two 5, a liquid discharging manual ball valve 14 is communicated. The coarse filter 6 and the fine filter 7 are communicated with each other through a pipeline. The discharging end of the fine filter 7 is communicated with a U-shaped pipeline through a check valve 8. On the inner wall of the equipment main body 1 above the pneumatic diaphragm pump 4, an air control box 15 is fixedly installed. On the inner wall of the equipment main body 1 below the air control box 15, a pressure regulating filter 11 is fixedly installed. The air inlet end of the pressure regulating filter 11 is communicated with an external air supply device. The air outlet end of the pressure regulating filter 11 is communicated with the U-shaped pipeline through a blowing angle seat valve pipe 12;

[0059] Specifically, as Figure 16 shown, by cooperating with the cleaning liquid tank 2, the pneumatic diaphragm pump 4, etc., the recycling of the solvent-based cleaning liquid is realized. Moreover, by using the coarse filter 6 and the fine filter 7, it is further ensured that there are no impurities in the solvent-based cleaning liquid required for cleaning, guaranteeing the cleaning effect. At the same time, by using the liquid adding manual ball valve 13 and the liquid discharging manual ball valve 14, the amount of the solvent-based cleaning liquid in the cleaning liquid tank 2 can be increased or decreased, ensuring the normal operation of the equipment;

[0060] The fixed shaft body 1091 includes a tail part 109101. One end of the tail part 109101 is fixed with a base bottom plate 109104. Fixing shaft fixing holes 109105 are annularly and equidistantly arranged on one side of the base bottom plate 109104 close to the tail part 109101. A fixing shaft base 109103 is fixed on the other side of the base bottom plate 109104. A base top plate 109106 is fixed on the outside of the fixing shaft base 109103. An end part 109107 is fixed on one side of the base top plate 109106 away from the tail part 109101. An end plate 109110 is fixed at the front end of the end part 109107. Cover fixing threaded holes 109112 are annularly and equidistantly arranged on the end plate 109110. An outlet two 109111 is arranged at the center of the end plate 109110. An annular groove 109109 is arranged on the outside of the end part 109107. Oppositely arranged outlet one 109108 is arranged inside the annular groove 109109. An inlet 109102 is arranged at the front end of the tail part 109101. The inlet 109102, the outlet one 109108 and the outlet two 109111 are communicated with each other;

[0061] Cover fixing through holes 109302 are annularly and equidistantly arranged on the cover body 1093. The cover fixing through holes 109302 correspond to the cover fixing threaded holes 109112 in position one by one and are connected with bolts. A cover spray hole 109301 is arranged at the center of the cover body 1093. The position of the cover spray hole 109301 corresponds to the position of the outlet two 109111;

[0062] Bearing grooves 109201 are arranged at both ends of the inner wall of the rotating sleeve body 1092. Rotating sleeve bearings 1099 are clamped inside the bearing grooves 109201. The rotating sleeve body 1092 is rotatably sleeved on the end part 109107 through the rotating sleeve bearings 1099. Rotating sleeve steps 109204 are arranged on both sides of the rotating sleeve body 1092. Spray rod mounting holes 109202 are arranged on the outer walls of the rotating sleeve body 1092 away from the rotating sleeve steps 109204. Spray rod connection steps 109203 are fixed on the outside of the spray rod mounting holes 109202;

[0063] The connecting pipe body 1094 includes a connecting screw main body 109401. A connecting screw through hole 109402 is arranged inside the connecting screw main body 109401. The outer surface of the connecting screw main body 109401 is in threaded connection with the inside of the spray rod mounting hole 109202. A connecting pipe mounting step 109403 is fixed at the rear end of the connecting screw main body 109401. Connecting pipe mounting surfaces 109404 are arranged on both sides of the connecting pipe mounting step 109403. A spray rod threaded hole 109405 is arranged inside the connecting pipe mounting step 109403. The spray rod threaded hole 109405 is communicated with the connecting screw through hole 109402;

[0064] At the front end of the boom body 1095, a boom screw main body 109501 is fixed. The outer surface of the boom screw main body 109501 is threadedly connected to the internal thread of the boom threaded hole 109405. A boom screw through hole 109502 is provided through the boom screw main body 109501 and the boom body 1095. The side wall of the boom screw through hole 109502 is evenly provided with a front threaded hole 109503 and a side threaded hole 109505. The internal of the front threaded hole 109503 is threadedly connected to one end of the front nozzle 1096. The internal of the side threaded hole 109505 is threadedly connected to one end of the side nozzle 1098. At the rear end of the boom body 1095, a top threaded hole 109506 is provided. The internal of the top threaded hole 109506 is threadedly connected to the outer surface of the outer four-corner plug 1097. At a position on the outer surface of the boom body 1095 close to the top threaded hole 109506, two oppositely arranged boom mounting steps 109504 are provided;

[0065] Specifically, as Figures 3-13 shown, in the assembly process of the equipment, fasteners such as screws, spring washers, and flat washers are used to cooperate with the cover to fix the through hole 109302 and the cover fixing threaded hole 109112, so as to achieve the rapid assembly between the cover body 1093 and the end part 109107. By using threaded connection, the connection pipe body 1094 and the rotating sleeve body 1092 can be rapidly assembled. By using threaded connection, the rapid assembly between the front nozzle 1096, the side nozzle 1098, the outer four-corner plug 1097, and the boom body 1095 can be achieved. Then, by inserting the tail part 109101 into the through hole on the side wall of the spraying bin 101 and using the fixing shaft fixing hole 109105 to cooperate with fasteners such as screws, spring washers, and flat washers to assemble and fix the tail part 109101, the overall structure of the boom assembly 109 is simple, the disassembly, installation, and maintenance in the later stage are convenient, and at the same time, the subsequent maintenance cost is reduced.

[0066] In this embodiment, during use, first slide the stencil through the chute 108 into the interior of the spray chamber 101, and use the card seat 1010 and the positioning bracket 1011 to fix the sides and the top of the stencil. During the cleaning operation, the liquid addition manual ball valve 13 and the liquid discharge manual ball valve 14 are closed. By starting the pneumatic diaphragm pump 4, the solvent-based cleaning liquid in the cleaning liquid tank 2 enters the circulation manual ball valve pipe two 5 through the circulation manual ball valve pipe one 3, passes through the coarse filter 6 and the fine filter 7, and enters the fixed shaft body 1091 on both sides through the check valve 8 via the U-shaped pipe, and then sprays the solvent-based cleaning liquid onto the front and back sides of the stencil synchronously from the cover spray holes 109301 and the front nozzles 1096, improving the cleaning efficiency, thereby removing the stains on the surface of the stencil. At the same time, since part of the solvent-based cleaning liquid will be discharged through the side nozzles 1098, and the spraying direction of the side nozzles 1098 is perpendicular to the radial direction of the fixed shaft body 1091, the reaction force generated by the spraying drives the spray rod body 1095 to rotate around the fixed shaft body 1091, that is, rotate from point A along the direction of point B, so that the front nozzles 1096 perform self-rotating spraying cleaning, increasing the spraying range of the solvent-based cleaning liquid. After cleaning, the solvent-based cleaning liquid flows back along the funnel reflux groove 1013 under the action of gravity and flows into the interior of the cleaning liquid tank 2 through the quick connector 1014 for recycling;

[0067] After cleaning is completed, start the drying operation. At this time, the pneumatic diaphragm pump 4 stops running. Using an external air supply device, compressed air enters the interior of the air blowing angle seat valve pipe 12 through the pressure regulating filter 11, and the compressed air enters the fixed shaft body 1091 through the U-shaped pipe and sprays out from the cover spray holes 109301 and the front nozzles 1096. By using air flow spraying, on the one hand, it reduces the residue of the solvent-based cleaning liquid in the pipeline, and on the other hand, it uses the rapid flow of the air flow in the spray chamber 101 to increase the downward flow of the solvent-based cleaning liquid on the surface of the stencil to achieve the drying effect. And part of the air flow is discharged through the side nozzles 1098, thereby realizing the self-rotating movement of the spray rod body 1095, further improving the fluidity of the air flow in the spray chamber 101, increasing the drying rate, and at the same time, the centrifugal action of rotation further prevents the residue of the solvent-based cleaning liquid in the pipeline of the spray rod body 1095;

[0068] During the above cleaning and drying processes, the circulation manual ball valve pipe one 3 and the circulation manual ball valve pipe two 5 are in the normally open state, the liquid addition manual ball valve 13 and the liquid discharge manual ball valve 14 are in the normally closed state, and the check valve 8 only allows the fluid to pass through unidirectionally;

[0069] When the cleaning liquid in the cleaning liquid tank 2 is less, the liquid adding operation can be started. The circulating manual ball valve pipe 1 3 and the drain manual ball valve 14 are adjusted to the closed state, and the liquid adding manual ball valve 13 and the circulating manual ball valve pipe 2 5 are adjusted to the open state. The hose on the liquid adding manual ball valve 13 is inserted into an external liquid bucket. Under the pressure of the pneumatic diaphragm pump 4, the external solvent-based cleaning liquid is filled into the cleaning liquid tank 2 through the circulating manual ball valve pipe 2 5, the coarse filter 6, the fine filter 7, the one-way valve 8, the spray bar assembly 109, and the spray chamber 101. The circulating manual ball valve pipe 2 5 can be opened to enable the liquid adding operation to be carried out synchronously during the cleaning process;

[0070] During the draining process, the circulating manual ball valve pipe 2 5 and the liquid adding manual ball valve 13 are adjusted to the closed state, and the circulating manual ball valve pipe 1 3 and the drain manual ball valve 14 are adjusted to the open state. The hose on the drain manual ball valve 14 is inserted into the interior of an external collection bucket. Under the pressure of the pneumatic diaphragm pump 4, the solvent-based cleaning liquid in the cleaning liquid tank 2 is drained. During the liquid adding and draining processes, the pressurization of the pneumatic diaphragm pump 4 is utilized to avoid directly opening and closing the cleaning liquid tank 2, effectively preventing the volatilization of the solvent-based cleaning liquid in the cleaning liquid tank 2.

[0071] Embodiment 2

[0072] In order to further improve the working efficiency of the equipment and increase the recycling rate of the solvent-based cleaning liquid, the following solution is disclosed, specifically as Figure 2 、 Figure 14 、 Figure 15 shown:

[0073] The exhaust duct 9 includes an exhaust downpipe 901 connecting the top end of the equipment main body 1 and the bottom end of the spray chamber 101. One side of the exhaust downpipe 901 is communicated with an exhaust uppipe 902. One end of the exhaust uppipe 902 is connected to the top end of the spray chamber 101. The exhaust opening and closing mechanism 10 is located below the connection of the exhaust downpipe 901 and the exhaust uppipe 902. The exhaust opening and closing mechanism 10 includes a switch box 1008 arranged outside the exhaust downpipe 901. A travel window 1009 communicated with the exhaust downpipe 901 is opened on the switch box 1008. A switch plate 10010 is slidably installed inside the travel window 1009. One side of the top end of the switch plate 10010 is welded with a connecting block 1007. One end of the connecting block 1007 is welded with a push rod 1006. One end of the push rod 1006 penetrates to the outside of the exhaust downpipe 901. An installation bracket one 1001 is fixed on the outer wall of the spray chamber 101. A bracket strip hole 10011 is opened on the installation bracket one 1001. A locking member 1003 is installed inside the bracket strip hole 10011. A cylinder body 1002 is fixed inside the locking member 1003. The telescopic end of the cylinder body 1002 is threadedly connected with a connecting member 1005. One end of the connecting member 1005 is threadedly connected with the outer end of the push rod 1006. One side of the top end of the switch box 1008 is fixed with an installation bracket two 1004. The inside of the installation bracket two 1004 is penetrated and connected with the front end of the cylinder body 1002;

[0074] Specifically, as Figure 14 shown, by using the telescopic action of the cylinder body 1002, the opening and closing of the travel window 1009 can be controlled, and at the same time, the opening degree of the travel window 1009 can be controlled to control the exhaust efficiency of the exhaust duct 9 according to different cleaning durations and drying durations. Since the exhaust downpipe 901 is distributed in an S shape, the exhaust downpipe 901 is used to prevent the volatilization of the solvent-based cleaning liquid at the bottom end of the spray chamber 101 for pre-storage and condensation, and is intercepted by the exhaust opening and closing mechanism 10 to reduce the volatilization amount of the solvent-based cleaning liquid. The exhaust uppipe 902 is used to discharge the volatilization of the solvent-based cleaning liquid at the position of the feed bin door to prevent the solvent-based cleaning liquid from discharging from the feed bin door and avoid the injury of the staff standing at the position of the feed bin door;

[0075] A filter box 206 is installed at the bottom end of the fixed pipe 201. Two upper slot plates 203 are oppositely arranged and installed at the top end of the filter box 206. A plurality of lower fixing holes 205 are penetrated between the upper slot plates 203 and the filter box 206. An upper insertion plate 202 is fixedly sleeved at the bottom end of the fixed pipe 201. The upper insertion plate 202 is horizontally inserted into the interiors of the two upper slot plates 203. A plurality of upper fixing holes 204 are penetrated between the upper slot plates 203 and the upper insertion plate 202. A liquid tank cover 2010 is rotatably connected to one side of the top end of the cleaning liquid tank 2. A sealing strip 209 is fixed on the opening of the cleaning liquid tank 2 below the liquid tank cover 2010. Two spring buckles 208 are fixedly arranged in parallel on the outer side of the cleaning liquid tank 2. The top end of the spring buckle 208 is clamped with one side of the liquid tank cover 2010. A liquid level display tube 207 is arranged on the side wall of the cleaning liquid tank 2;

[0076] Specifically, as Figure 15 shown, the liquid level display tube 207 is communicated with the inside of the cleaning liquid tank 2 to form a U-shaped communicating vessel. The liquid level height in the liquid level display tube 207 is the same as the liquid level height of the cleaning liquid tank 2. In order to facilitate observing the liquid level height, a red floating ball is arranged in the liquid level display tube 207. According to the position of the red floating ball, it is judged whether to start the working mode of adding / discharging the solvent-based cleaning liquid. The spring buckle 208 is used to quickly open the liquid tank cover 2010.

[0077] In this embodiment, during cleaning, liquid adding and liquid discharging, the locking member 1003 is in an extended state, so that the push rod 1006 extends into the inside of the exhaust down pipe 901, thereby blocking the stroke window 1009, blocking the top outlet of the exhaust pipe 9, and making the inside of the spray chamber 101 in a relatively closed state to prevent the solvent-based cleaning liquid from volatilizing to the outside of the equipment main body 1 and reducing the waste of the solvent-based cleaning liquid;

[0078] During drying, the locking member 1003 shortens, so that the push rod 1006 moves outward from the exhaust down pipe 901, thereby opening the stroke window 1009, and discharging the compressed air inside the spray chamber 101 to the outside to balance the air pressure;

[0079] The filter box 206 is used to preliminarily remove impurities from the solvent-based cleaning liquid flowing back to the cleaning liquid tank 2, prevent the particulate impurities on the steel mesh carried by the cleaning from entering the pneumatic diaphragm pump 4, protect the pneumatic diaphragm pump 4, and at the same time improve the recycling rate of the solvent-based cleaning liquid. By opening the liquid tank cover 2010 and removing the upper slot plate 203 by screwing, the filter box 206 and the fixed pipe 201 can be separately disassembled, so that the filter box 206 can be removed from the cleaning liquid tank 2 for cleaning, and the inside of the cleaning liquid tank 2 can be cleaned.

[0080] Embodiment III

[0081] In order to further improve the automation level of the equipment and enhance the explosion-proof safety during use, the following solution is disclosed. Specifically, as shown in Figure 1 , Figure 16 :

[0082] On the outer wall of the equipment main body 1 on one side of the feed bin door, a control panel is provided. On the control panel, a gas source indicator light 102, a door indicator light 103, a start button 104, a cleaning time timer 105, a drying time timer 106, and an emergency stop button 107 are sequentially arranged. A pressure switch 1012 is installed on one side of the feed bin door of the spray bin 101. An air control box 15 is fixed on the inner side wall of the equipment main body 1. The pressure regulating filter 11 is pneumatically connected to the air inlet of the air control box 15 through a pipeline. The air control box 15 is pneumatically connected to the driving air ports of the air blowing angle seat valve pipe 12, the cylinder main body 1002, and the pneumatic diaphragm pump 4 through pipelines. The input end of the pressure regulating filter 11 is electrically connected to the air control box 15. The output end of the pressure switch 1012 is electrically connected to the door indicator light 103 and the emergency stop button 107. The output ends of the cleaning time timer 105 and the drying time timer 106 are both electrically connected to the air control box 15. The cleaning time timer 105 and the drying time timer 106 are in parallel. The output ends of the door indicator light 103, the start button 104, and the emergency stop button 107 are all electrically connected to the air control box 15. The output end of the air control box 15 is electrically connected to the pneumatic diaphragm pump 4, the gas source indicator light 102, the cylinder main body 1002, and the air blowing angle seat valve pipe 12 respectively.

[0083] In this embodiment, when the feed bin door on the spray bin 101 is opened during the working state, it will cause the feed bin door to squeeze and touch the pressure switch 1012, thereby enabling the pressure switch 1012 to control the start of the emergency stop button 107, stopping the operation of the equipment. At this time, the door indicator light 103 changes from the normal green light to the red light in the pending state. Or when it is necessary to stop the equipment, by manually pressing the emergency stop button 107, the air control box 15 controls the pneumatic diaphragm pump 4, the gas source indicator light 102, the cylinder main body 1002, and the air blowing angle seat valve pipe 12 to stop operating;

[0084] In the working state, the cleaning time and drying time are set through the control panel, and there are a cleaning time timer 105 and a drying time timer 106 to timely control the operation duration of the work. Press the start button 104 to start the operation of the device. Among them, in the cleaning state, the air control box 15 automatically controls the pneumatic diaphragm pump 4 to start, and at the same time controls the cylinder body 1002 to be in the extended state, so that the exhaust opening and closing mechanism 10 is closed. At this time, the air blowing angle seat valve pipe 12 is in the normally closed state. In the drying state, the air control box 15 controls the pneumatic diaphragm pump 4 to stop running, and then controls the air blowing angle seat valve pipe 12 to open, so that the compressed air in the pressure regulating filter 11 enters the spray chamber 101 through the air blowing angle seat valve pipe 12. At the same time, the cylinder body 1002 shortens, and the exhaust opening and closing mechanism 10 opens to discharge the compressed air. Since the device adopts all-pneumatic control, the safety of the solvent-based cleaning liquid during cleaning is improved, and the possibility of flammability and explosiveness is reduced.

[0085] A cleaning method for an all-pneumatic cleaning device for a steel mesh includes the following implementation steps:

[0086] S1: Push the steel mesh from the feed bin door into the interior of the spray chamber 101, so that the bottom end of the steel mesh slides along the chute 108, and the innermost side is fixed by the positioning bracket 1011, and the top end is fixed by the clamp seat 1010;

[0087] S2: During cleaning, close the feed bin door, set the cleaning and drying times through the control panel, and press the start button 104. At this time, the circulating manual ball valve pipe one 3 and the circulating manual ball valve pipe two 5 are in the open state, the liquid adding manual ball valve 13 and the liquid discharging manual ball valve 14 are in the closed state, and the pneumatic diaphragm pump 4 starts. The solvent-based cleaning liquid in the cleaning liquid tank 2 is transmitted along the circulating manual ball valve pipe one 3, the pneumatic diaphragm pump 4, the circulating manual ball valve pipe two 5, the coarse filter 6, the fine filter 7 through the one-way valve 8 to the U-shaped pipe, and under the action of the fixed shaft body 1091 on both sides in the spray chamber 101, it is sprayed out through the cover spray hole 109301, the front nozzle 1096 and the side nozzle 1098. The cover spray hole 109301 and the front nozzle 1096 are used to realize the spraying of the front and back sides of the steel mesh. Since the spraying direction of the side nozzle 1098 is perpendicular to the front nozzle 1096, the spraying force generates a vertical radial driving force on the spray rod body 1095, so that the spray rod body 1095 rotates around the fixed shaft body 1091 to realize the self-rotating spraying effect on the front and back sides of the steel mesh;

[0088] S3: During the cleaning process, the cylinder body 1002 extends to block the stroke window 1009 with the switch board 10010, thereby blocking the exhaust port of the exhaust downpipe 901 to condense and reflux the solvent-based cleaning liquid volatilized from the bottom end of the spray chamber 101, reducing waste. Meanwhile, the solvent-based cleaning liquid volatilized near the feed bin door is discharged to improve the safety of the feed bin door position. At the same time, the solvent-based cleaning liquid flows along the funnel reflux trough 1013 after being cleaned by the steel mesh, and successively passes through the quick connector 1014 and the fixed pipe 201 into the filter box 206. The large-particle impurities in the solvent-based cleaning liquid are intercepted by the filter screen on the filter box 206 to prevent the solvent-based cleaning liquid from carrying impurities during the circulating cleaning process of the pneumatic diaphragm pump 4;

[0089] S4: When the cleaning is completed, start the drying program. Control the pneumatic diaphragm pump 4 to automatically close through the air control box 15, so that the compressed air of the external air supply equipment enters the U-shaped pipe through the pressure regulating filter 11 and the air blowing angle seat valve pipe 12. The compressed air enters the fixed shaft body 1091 and is ejected outward through the cover spray hole 109301, the front nozzle 1096 and the side nozzle 1098. The compressed air jets and dries the solvent-based cleaning liquid on the surface of the steel mesh through the cover spray hole 109301 and the front nozzle 1096. Using the jet power of the side nozzle 1098, the spray rod body 1095 rotates automatically. At this time, the cylinder body 1002 shortens, the stroke window 1009 opens, and the compressed air entering the spray chamber 101 is discharged outward through the exhaust downpipe 901 and the exhaust uppipe 902;

[0090] S5: Use the liquid level display tube 207 to check the content of the solvent-based cleaning liquid in the cleaning liquid tank 2. When the solvent-based cleaning liquid is insufficient, set the circulating manual ball valve pipe 1 and the drain manual ball valve 14 to close. Insert the hose of the filling manual ball valve 13 into the external solvent-based cleaning liquid bucket, start the pneumatic diaphragm pump 4, and pass the external solvent-based cleaning liquid through the filling manual ball valve 13 and the pneumatic diaphragm pump 4 successively through the circulating manual ball valve pipe 2, the coarse filter 6, the fine filter 7, and the one-way valve 8 into the spray chamber 101, and then flow along the funnel reflux trough 1013 and enter the cleaning liquid tank 2 through the quick connector 1014 for addition. When the solvent-based cleaning liquid in the cleaning liquid tank 2 needs to be replaced, the filling manual ball valve 13 and the circulating manual ball valve pipe 2 can be set to close, start the pneumatic diaphragm pump 4, and make the solvent-based cleaning liquid in the cleaning liquid tank 2 pass through the circulating manual ball valve pipe 1 and the pneumatic diaphragm pump 4 into the drain manual ball valve 14 and be discharged outward;

[0091] S6: During the cleaning or drying process, when the feed bin door of the spray bin 101 is opened, the pressure switch 1012 is pressed to transmit a signal to the emergency stop button 107, causing the pneumatic control box 15 to automatically control the closing of the pneumatic angle seat valve pipe 12 and the pneumatic diaphragm pump 4, or directly manually pressing the emergency stop button 107 to immediately stop the operation of the equipment main body 1.

[0092] The technical scope of the present invention is not limited to the content described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A fully pneumatic cleaning device for a stencil, characterized in that It includes a device main body, casters are evenly installed at the bottom end of the device main body, a spray chamber is arranged inside the device main body, a feed bin door is connected between one side of the spray chamber and the device main body, an exhaust pipe penetrates through the top end of the device main body, one end of the exhaust pipe extends into the interior of the spray chamber, an exhaust opening and closing mechanism is arranged outside the exhaust pipe, a chute is fixed at the bottom end inside the spray chamber, a positioning bracket is fixed on the side wall of the spray chamber opposite to the feed bin door, a clamping seat is movably installed inside the spray chamber, a funnel-shaped reflux groove is arranged at the bottom end inside the spray chamber, a quick connector penetrates through the bottom end of the funnel-shaped reflux groove, spray rod assemblies are arranged at the centers of two opposite sides of the spray chamber far away from the feed bin door, and one ends of the spray rod assemblies located outside the spray chamber are jointly communicated with a U-shaped pipe; A cleaning liquid tank is fixed at the bottom end inside the device main body, a fixed pipe is fixedly penetrated through the top end of the cleaning liquid tank, the top end of the fixed pipe is communicated with the bottom end of the quick connector, a pneumatic diaphragm pump is arranged on one side of the cleaning liquid tank, a circulating manual ball valve pipe 1 is communicated between the feed end of the pneumatic diaphragm pump and the cleaning liquid tank, a liquid adding manual ball valve is communicated on one side of the circulating manual ball valve pipe 1, a coarse filter and a fine filter are sequentially fixed on the side wall of the device main body opposite to the cleaning liquid tank, a circulating manual ball valve pipe 2 is communicated between the discharge end of the pneumatic diaphragm pump and the coarse filter, a drain manual ball valve is communicated on one side of the circulating manual ball valve pipe 2, the coarse filter and the fine filter are mutually communicated through a pipe, the discharge end of the fine filter is connected with the U-shaped pipe through a one-way valve, an air control box is fixed on the inner wall of the device main body above the pneumatic diaphragm pump, a pressure regulating filter is fixed on the inner wall of the device main body below the air control box, the air inlet end of the pressure regulating filter is communicated with an external air supply device, and the air outlet end of the pressure regulating filter is communicated with the U-shaped pipe through a blowing angle seat valve pipe.

2. The all-pneumatic cleaning equipment for a stencil according to claim 1, wherein: The spray rod assembly includes a fixed shaft body penetrating through the center of the side wall of the spray chamber, a rotating sleeve body is sleeved at one end of the fixed shaft body located inside the spray chamber, a cover body is installed at one end of the rotating sleeve body, connecting pipe bodies are installed on both sides of the rotating sleeve body, one ends of the connecting pipe bodies are all communicated with a spray rod body, outer four-corner plugs are arranged at the outer ends of the spray rod bodies, front nozzles and side nozzles are evenly arranged on the outer sides of the spray rod bodies, the spraying directions of the front nozzles and the side nozzles are perpendicular to each other, and the spraying directions of the upper and lower groups of side nozzles are opposite.

3. The fully pneumatic cleaning equipment for stencils according to claim 2, characterized in that: The fixed shaft body includes a tail portion, one end of the tail portion is fixed with a base bottom plate, the side of the base bottom plate close to the tail portion is annularly and equidistantly provided with fixed shaft fixing holes, the other side of the base bottom plate is fixed with a fixed shaft base, the outside of the fixed shaft base is fixed with a base top plate, the side of the base top plate away from the tail portion is fixed with an end portion, the front end of the end portion is fixed with an end plate, the end plate is annularly and equidistantly provided with cover fixing threaded holes, the center of the end plate is provided with an outlet two, the outside of the end portion is provided with an annular groove, the inside of the annular groove is provided with oppositely arranged outlet ones, the front end of the tail portion is provided with an inlet, the inlet, the outlet one and the outlet two are communicated with each other, the cover body is annularly and equidistantly provided with cover fixing through holes, the positions of the cover fixing through holes and the cover fixing threaded holes correspond one by one and are connected with bolts, the center of the cover body is provided with a cover spray hole, and the position of the cover spray hole corresponds to the position of the outlet two.

4. The all-pneumatic cleaning device for a stencil according to claim 3, characterized in that: Both ends of the inner wall of the rotating sleeve body are provided with bearing grooves, the inside of the bearing grooves are both clamped with rotating sleeve bearings, the rotating sleeve body is rotatably sleeved on the end portion through the rotating sleeve bearings, the two sides of the rotating sleeve body are provided with rotating sleeve steps, and the outer walls of the rotating sleeve body away from the rotating sleeve steps are both provided with spray rod mounting holes, and the outside of the spray rod mounting holes are both fixed with spray rod connection steps.

5. The all-pneumatic cleaning device for a stencil according to claim 4, characterized in that: The connecting pipe body includes a connecting screw rod main body, the inside of the connecting screw rod main body is provided with a connecting screw rod through hole, the outer surface of the connecting screw rod main body is in threaded connection with the inside of the spray rod mounting hole, the rear end of the connecting screw rod main body is fixed with a connecting pipe mounting step, both sides of the connecting pipe mounting step are provided with connecting pipe mounting surfaces, the inside of the connecting pipe mounting step is provided with a spray rod threaded hole, and the spray rod threaded hole is communicated with the connecting screw rod through hole.

6. The full-pneumatic cleaning device for a stencil according to claim 5, characterized in that: The front end of the spray rod body is fixed with a spray rod screw rod main body, the outer surface of the spray rod screw rod main body is in threaded connection with the inside of the spray rod threaded hole, a spray rod screw rod through hole runs through between the spray rod screw rod main body and the spray rod body, the side wall of the spray rod screw rod through hole is evenly provided with front threaded holes and side threaded holes, one end of the front nozzle is in threaded connection with the inside of the front threaded hole, one end of the side nozzle is in threaded connection with the inside of the side threaded hole, the rear end of the spray rod body is provided with a top threaded hole, the outer surface of the outer four-corner plug is in threaded connection with the inside of the top threaded hole, and two oppositely arranged spray rod mounting steps are arranged at the position of the outer surface of the spray rod body close to the top threaded hole.

7. The fully pneumatic cleaning equipment for stencils according to claim 1, characterized in that: The exhaust duct includes an exhaust downpipe connecting the top end of the equipment main body and the bottom end of the spray chamber. One side of the exhaust downpipe is communicated with an exhaust uppipe. One end of the exhaust uppipe is connected to the top end of the spray chamber. The exhaust opening and closing mechanism is located below the connection of the exhaust downpipe and the exhaust uppipe. The exhaust opening and closing mechanism includes a switch box arranged outside the exhaust downpipe. A travel window communicated with the exhaust downpipe is opened on the switch box. A switch plate is slidably installed inside the travel window. One side of the top end of the switch plate is welded with a connecting block. One end of the connecting block is welded with a push rod. One end of the push rod penetrates to the outside of the exhaust downpipe. An installation bracket one is fixed on the outer wall of the spray chamber. A bracket strip hole is opened on the installation bracket one. A locking piece is installed inside the bracket strip hole. A cylinder main body is fixed inside the locking piece. The telescopic end of the cylinder main body is threadedly connected with a connecting piece. One end of the connecting piece is threadedly connected with the outer end of the push rod. One side of the top end of the switch box is fixed with an installation bracket two. The inside of the installation bracket two and the front end of the cylinder main body are penetrated and connected.

8. The all-pneumatic cleaning equipment for a stencil according to claim 1, characterized in that: A filter box is installed at the bottom end of the fixed pipe. Two relatively arranged upper slot plates are installed at the top end of the filter box. A plurality of lower fixing holes are penetrated between the upper slot plates and the filter box. The upper end of the fixed pipe is fixedly sleeved with an upper insertion plate. The upper insertion plate is horizontally inserted into the inside of the two upper slot plates. A plurality of upper fixing holes are penetrated between the upper slot plates and the upper insertion plate. A liquid tank cover is rotatably connected to one side of the top end of the cleaning liquid tank. A sealing strip is fixed on the opening of the cleaning liquid tank below the liquid tank cover. Two parallel spring buckles are fixed on the outside of the cleaning liquid tank. The top end of the spring buckle is clamped with one side of the liquid tank cover. A liquid level display pipe is arranged on the side wall of the cleaning liquid tank.

9. The fully pneumatic cleaning device for a stencil according to claim 7, characterized in that: A control panel is arranged on the outer wall of the equipment main body on one side of the feed bin door. A gas source indicator light, a door indicator light, a start button, a cleaning time timer, a drying time timer, and an emergency stop button are sequentially arranged on the control panel. A pressure switch is installed on one side of the feed bin door of the spray chamber. An air control box is fixed on the inner side wall of the equipment main body. The pressure regulating filter is pneumatically connected to the air inlet of the air control box through a pipeline. The air control box is pneumatically connected to the driving air ports of the air blowing angle seat valve pipe, the cylinder main body, and the pneumatic diaphragm pump through pipelines. The input end of the pressure regulating filter is electrically connected to the air control box. The output end of the pressure switch is electrically connected to the emergency stop button. The output ends of the emergency stop button, the cleaning time timer, and the drying time timer are all electrically connected to the door indicator light. The cleaning time timer and the drying time timer are connected in parallel. The output ends of the door indicator light and the start button are both electrically connected to the air control box. The output end of the air control box is electrically connected to the pneumatic diaphragm pump, the gas source indicator light, the cylinder main body, and the air blowing angle seat valve pipe respectively.

10. A cleaning method for a fully pneumatic cleaning device for a stencil according to any one of claims 1-9, characterized in that, It includes the following implementation steps: S1: Push the steel mesh from the feed bin door into the spray chamber, make the bottom end of the steel mesh slide along the chute, fix the innermost side through the positioning bracket, and fix the top end through the card seat; S2: During cleaning, close the feed bin door, set the cleaning and drying time through the control panel, and press the start button. At this time, the circulation manual ball valve pipe 1 and the circulation manual ball valve pipe 2 are in the open state, the liquid adding manual ball valve and the liquid discharging manual ball valve are in the closed state, and the pneumatic diaphragm pump starts. The solvent-based cleaning liquid in the cleaning liquid tank flows along the circulation manual ball valve pipe 1, the pneumatic diaphragm pump, the circulation manual ball valve pipe 2, the coarse filter, the fine filter, and is transmitted to the U-shaped pipe through the check valve. Under the action of the fixed shaft body on both sides in the spraying bin, it is sprayed out through the cover spray holes, the front nozzles, and the side nozzles. By using the functions of the cover spray holes and the front nozzles, spraying on both the front and back sides of the stencil is achieved. Since the spraying direction of the side nozzles is perpendicular to that of the front nozzles, the spraying force generates a perpendicular radial driving force on the spray rod body, causing the spray rod body to rotate around the fixed shaft body to achieve the self-rotating spraying effect on both the front and back sides of the stencil; S3: During the cleaning process, the cylinder body extends, causing the switch plate to block the stroke window, thereby blocking the exhaust port of the exhaust down pipe to condense and reflux the solvent-based cleaning liquid volatilized at the bottom of the spraying bin, reducing waste. At the same time, the solvent-based cleaning liquid volatilized near the feed bin door is discharged to improve the safety of the feed bin door position. At the same time, the solvent-based cleaning liquid flows back along the funnel reflux trough after passing through the steel mesh cleaning, and successively passes through the quick connector and the fixed pipe into the filter box. The large particle impurities in the solvent-based cleaning liquid are intercepted by the filter screen on the filter box to prevent the solvent-based cleaning liquid from carrying impurities during the circulating cleaning process of the pneumatic diaphragm pump; S4: When the cleaning is completed, start the drying program. The pneumatic diaphragm pump is automatically closed through the air control box, and the compressed air of the external air supply equipment enters the U-shaped pipe through the pressure regulating filter and the air blowing angle seat valve pipe. The compressed air enters the fixed shaft body and is sprayed out through the cover spray holes, the front nozzles, and the side nozzles. Through the cover spray holes and the front nozzles, the compressed air jets and dries the solvent-based cleaning liquid on the surface of the stencil. Using the jet power of the side nozzles, the spray rod body rotates automatically. At this time, the cylinder body shortens, the stroke window opens, and the compressed air entering the spraying bin is discharged outward through the exhaust down pipe and the exhaust up pipe; S5: Use the liquid level display tube to check the content of the solvent-based cleaning liquid in the cleaning liquid tank. When the solvent-based cleaning liquid is insufficient, set the circulation manual ball valve pipe 1 and the liquid discharging manual ball valve to be closed. Insert the hose of the liquid adding manual ball valve into the external solvent-based cleaning liquid bucket, start the pneumatic diaphragm pump, and the external solvent-based cleaning liquid passes through the liquid adding manual ball valve, the pneumatic diaphragm pump, the circulation manual ball valve pipe 2, the coarse filter, the fine filter, and the check valve into the spraying bin, and then flows along the funnel reflux trough and enters the cleaning liquid tank through the quick connector for addition. When the solvent-based cleaning liquid in the cleaning liquid tank needs to be replaced, the liquid adding manual ball valve and the circulation manual ball valve pipe 2 can be set to be closed, and the pneumatic diaphragm pump is started to make the solvent-based cleaning liquid in the cleaning liquid tank pass through the circulation manual ball valve pipe 1 and the pneumatic diaphragm pump and enter the liquid discharging manual ball valve for external discharge; S6: During the cleaning or drying process, when the feed bin door of the spray bin is opened, the pressure switch is pressed and transmits a signal to the emergency stop button, causing the pneumatic control box to automatically control the closing of the air blowing angle seat valve pipe and the pneumatic diaphragm pump, or directly manually pressing the emergency stop button to immediately stop the operation of the main equipment body.

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