Two-component coating applicator and method of spraying thereof

Abstract

The application discloses a double-component paint spraying machine and a spraying method thereof. The double-component paint spraying machine comprises a base, a pneumatic motor, an A-material control valve, an A-material double-cavity diaphragm pump, a B-material control valve, a B-material double-cavity diaphragm pump and a spray gun. The pneumatic motor, the A-material double-cavity diaphragm pump and the B-material double-cavity diaphragm pump are all mounted on the base, and the output shaft of the pneumatic motor is in transmission connection with the input shaft of the A-material double-cavity diaphragm pump and the input shaft of the B-material double-cavity diaphragm pump respectively. The discharge port of the A-material double-cavity diaphragm pump is in communication with the feed port of the A-material control valve, and the discharge port of the B-material double-cavity diaphragm pump is in communication with the feed port of the B-material control valve. The A-material control valve is provided with an A-material discharge pipe and an A-material return pipe, and the B-material control valve is provided with a B-material discharge pipe and a B-material return pipe. The application selects a pneumatic motor to replace an existing internal combustion engine and an electric motor, does not generate sparks and electric current, is safe and reliable, greatly reduces operation risks and meets the requirements of underground construction of coal mines.

Description

Technical Field

[0001] This invention relates to the field of spraying technology, and more specifically to a two-component paint spraying machine and its spraying method. Background Technology

[0002] Patent CN101596514B discloses a method and equipment for spraying a two-component coating. This method includes preparing a first component and a second component of the coating. The first component includes modified emulsified asphalt, and the second component includes an aqueous solution of calcium chloride. The first and second components are placed in a first container and a second container, respectively. An engine is started, simultaneously driving a first pump and a second pump via a rotating device. The first pump draws the first component from the first container through a first pipe and transmits it to a first spray gun through a third pipe. The second pump draws the second component from the second container through a second pipe and transmits it to a second spray gun through a fourth pipe. During spraying, the triggers of the first and second spray guns are simultaneously pulled, causing the first and second components to be sprayed out through the first and second spray guns respectively, interacting and reacting instantaneously, landing on the object to be sprayed to form a film layer.

[0003] However, the specific structure of the spray gun and the specific composition of the modified emulsified asphalt in the aforementioned spraying equipment are not disclosed, making it unsuitable for some flammable and explosive construction environments, such as underground coal mines. Spraying areas in underground coal mines mainly include the walls of goaf areas, ventilation doors, and the walls of roadways along the goaf. The spraying material needs to be applied to sealed walls, the four walls of the mine, and the coal surface to isolate air, blocking oxygen and gas, thus addressing the flammable and explosive problem underground at its source. This spraying and sealing technology is collectively known as fire prevention and air leakage sealing technology. However, the aforementioned spraying equipment cannot be used for underground operations because it is driven by a gasoline engine (or other internal combustion engine such as a diesel engine). An electric motor could also be used, but before sealing, there may be gas underground. The sparks from an internal combustion engine and the electric sparks from an electric motor can easily cause serious construction accidents such as fires and explosions.

[0004] In addition, the specific composition of the aforementioned modified emulsified asphalt is not disclosed, and it does not possess flame-retardant or antistatic properties. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a two-component paint spraying machine, comprising a base, a pneumatic motor, an A-component control valve, an A-component dual-chamber diaphragm pump, a B-component control valve, a B-component dual-chamber diaphragm pump, and a spray gun; the pneumatic motor, the A-component dual-chamber diaphragm pump, and the B-component dual-chamber diaphragm pump are all mounted on the base, and the output shaft of the pneumatic motor is respectively connected to the input shaft of the A-component dual-chamber diaphragm pump and the input shaft of the B-component dual-chamber diaphragm pump;

[0006] The outlet of the A-material dual-chamber diaphragm pump is connected to the inlet of the A-material control valve, and the outlet of the B-material dual-chamber diaphragm pump is connected to the inlet of the B-material control valve. The A-material control valve is equipped with an A-material outlet pipe and an A-material return pipe, and the B-material control valve is equipped with a B-material outlet pipe and a B-material return pipe.

[0007] The spray gun includes a nozzle, a handle, a trigger, an A-material regulating valve, and a B-material regulating valve. The A-material regulating valve and the B-material regulating valve are both fixedly connected to the front of the handle. The upper end of the trigger is hinged to the handle, and the middle part of the trigger is hinged to the pull rods at the rear ends of the A-material regulating valve and the B-material regulating valve. By pulling the trigger, the two pull rods move backward synchronously, thereby synchronously adjusting the valve opening of the A-material regulating valve and the valve opening of the B-material regulating valve.

[0008] Both the front opening of the A material regulating valve and the front opening of the B material regulating valve are equipped with spray pipes, and each spray pipe has a nozzle at its front end.

[0009] Each nozzle has the same structure, including an upper nut, a spray core, a filter element, and a connecting tube. The upper end of the connecting tube has an external thread that matches the upper nut. The spray core and the filter element are connected sequentially between the upper nut and the connecting tube. The spray core is cylindrical and has a through hole along its center line. The equivalent orifice diameter of the through hole is 0.66mm, 1.8mm, or 2.5mm. The top of the spray core has a radially extending V-shaped groove that intersects with the through hole. The two ends of the V-shaped groove have straight cut surfaces that slope towards the center of the spray core. Through the V-shaped groove, the through hole, and the straight cut surfaces, the sprayed paint is fan-shaped.

[0010] The A-material regulating valve and B-material regulating valve of the spray gun are respectively connected to the A-material outlet pipe and the B-material outlet pipe. The two spray pipes are bent towards the middle, and the V-shaped grooves of the two nozzles are parallel, so that the sprayed fan-shaped A-material and fan-shaped B-material intersect and mix.

[0011] The advantages of this equipment are as follows: It uses a pneumatic motor instead of the existing internal combustion engine and electric motor, eliminating sparks and current, ensuring safety and reliability, significantly reducing operational risks, and meeting the requirements of underground coal mine construction. Furthermore, the spray nozzle employs a specific size of through-hole, and the structure of the through-hole combined with V-shaped grooves and straight-line cut surfaces allows for the smooth passage of highly viscous liquid rubber without clogging. The intersection of the V-shaped grooves and through-holes ensures uniform spraying of the coating, guaranteeing a good coating effect.

[0012] Preferably, the A-material control valve is provided with two A-material discharge pipes, and the B-material control valve is provided with two B-material discharge pipes.

[0013] Preferably, the A-material control valve and the B-material control valve have the same structure, and both include a valve body, a regulating pipe, a valve core, a lever, and a knob. The valve body has an inlet, a left outlet pipe, a right outlet pipe, and a return pipe on its rear, left, right, and upper sides, respectively. The lower part of the regulating pipe is connected to the return pipe by a threaded seal. The return pipe has a return hole on its side, and the regulating pipe has a flow hole corresponding to the return hole on its side wall. The lever is fixedly sleeved on the outside of the regulating pipe. By rotating the regulating pipe with the lever, the return hole and the flow hole are aligned or misaligned, thereby opening or closing the return hole. Each left and right outlet pipe is equipped with a manual valve, and a pressure gauge communicating with the inner cavity of the valve body is provided on the front side of the valve body. The valve core is slidably connected to the inside of the regulating pipe, and the knob is threaded to the upper end of the regulating pipe. The valve core and the knob are connected by a spring. By rotating the knob, the effective area of ​​the valve core blocking the flow hole is changed, thereby adjusting the flow rate of the return hole.

[0014] The control valve is operated by first rotating the regulating tube 90° clockwise using the lever wrench to align the return orifice and the flow orifice. Then, rotate the knob downwards; the spring presses down on the valve core, gradually blocking the return orifice and reducing the paint return flow. This increases the discharge pressure in the left and right outlet pipes, thus increasing the spray distance and spray volume. Conversely, rotating the knob in the opposite direction reduces the spray distance and spray volume. To close the return orifice and maximize the spray distance and spray volume, rotate the regulating tube counterclockwise to misalign the return orifice and the flow orifice. Two control methods are used for regulating and opening / closing the paint return flow; only the flow regulation is controlled by the valve core, which reduces valve core wear and extends its service life.

[0015] Preferably, the valve core has a T-shaped cross-section, and the valve body has a guide tube coaxial with the valve core inside its cavity, with the lower part of the valve body slidably sealed within the guide tube. The knob has a downward-facing limiting rod inside, and the upper end of the valve core has a limiting boss. The two ends of the spring are respectively fitted onto the limiting rod and the limiting boss.

[0016] Preferably, the filter element includes a filter screen, a bottom cover, and a support cage. The support cage has a front plate and a rear plate at its front and rear ends, respectively. The filter screen is wrapped between the front plate and the rear plate, thus forming a filter chamber. The front plate has a liquid outlet hole communicating with the filter chamber. The bottom cover is detachably connected to the rear end of the rear plate, used to clamp the filter screen between the front plate and the rear cover. The rear end face of the spray core is adapted to the front plate, and the front cover and the rear cover are connected to form a sealing contact between the spray core and the front plate, and between the front plate and the front cover. The paint enters the filter chamber through the filter screen and finally flows out through the liquid outlet hole. The filter screen intercepts impurities and hardened paint materials on its outer side, preventing clogging of the spray gun nozzle and ensuring filtration efficiency. Because the inner side of the filter screen is in contact with the support plate, when the pressure increases, the pressure on the filter screen is transmitted to the support plate, which bears the pressure, thus greatly improving the pressure resistance of the filter screen, i.e., increasing the maximum pressure that the entire filter element can withstand.

[0017] Preferably, the output shaft of the pneumatic motor is provided with a double-groove pulley, the input shaft of the A-material dual-chamber diaphragm pump is provided with a first single-groove pulley, and the input shaft of the B-material dual-chamber diaphragm pump is provided with a second single-groove pulley, and the first single-groove pulley and the second single-groove pulley are identical; each groove of the double-groove pulley is respectively connected to the first single-groove pulley and the second single-groove pulley via a belt.

[0018] This invention also provides a method for spraying a two-component coating, comprising a material tank A and a material tank B.

[0019] The A-material bucket contains A-material, which is composed of quick-setting anionic emulsified asphalt with flame-retardant and antistatic functions and anionic synthetic rubber latex; the mass content of the quick-setting anionic emulsified asphalt with flame-retardant and antistatic functions is 53% to 67%.

[0020] The quick-setting anionic emulsified asphalt with flame-retardant and antistatic properties is made from raw materials comprising the following weight percentages:

[0021] The asphalt comprises 35%–45%, anionic emulsifier 0.2%–1.4%, stabilizer 0.2%–0.4%, synthetic rubber 6.5%–19.5%, and flame retardant and antistatic agent 6%–12%; the asphalt is 50#, 70#, or 90# heavy-duty petroleum asphalt or 50# building petroleum asphalt, and the aromatic content of the asphalt is not less than 45%.

[0022] The anionic emulsifier is a carboxylate, sulfonate, or sulfate salt, including but not limited to at least one of sodium oleate, sodium rosinate, sodium laurate, sodium naphthenate, sodium stearate, lauric acid soap, lignin sulfonate, sulfonated tall oil soap, sulfonated succinic acid, sodium dodecyl sulfate, potassium disproportionated rosinate, and sodium dodecylbenzene sulfonate.

[0023] The stabilizers include, but are not limited to, sodium carboxymethyl cellulose, sodium hydroxide, potassium hydroxide, hydroxyethyl cellulose, polyvinyl alcohol, polyacrylamide, and polyethylene glycol;

[0024] Synthetic rubbers include, but are not limited to, at least one of styrene-butadiene rubber, chloroprene rubber, cis-butadiene rubber, nitrile rubber, butyl styrene rubber, silicone rubber, fluororubber, SBS elastomer, acrylic rubber, SIS block copolymer, ethylene propylene rubber, and EPDM rubber;

[0025] The flame retardants and antistatic agents include, but are not limited to, decabromodiphenyl ether, tetrabromobisphenol A, octabromoether, decabromodiphenyl ethane, tetrabromoether, brominated polystyrene, hexabromocyclododecane, chlorinated paraffin, CPE, phosphate esters, phosphites, phosphonates, organophosphates, phosphorus heterocyclic compounds, polymeric phosphate esters, red phosphorus, phosphates, ammonium polyphosphate, melamine, dicyandiamide, zinc borate, sodium antimonate, sodium metasilicate, tetrapolyacrylamide, potassium nitrite guanidine carbonate, guanidine phosphate, condensed guanidine phosphate, guanidine aminosulfonate, aluminum hydroxide, and magnesium hydroxide;

[0026] The B material container contains B material, which is selected from at least one of the following: polyether demulsifier, quaternary ammonium salt demulsifier, polydimethylammonium chloride demulsifier, inorganic salt demulsifier, calcium chloride demulsifier, magnesium aluminum silicate demulsifier, polyacrylamide demulsifier, polyaluminum chloride demulsifier, magnesium chloride demulsifier, ferric chloride demulsifier, aluminum sulfate demulsifier, ferrous sulfate demulsifier, and flame retardant and antistatic agent.

[0027] Coating mixing:

[0028] S1. Use a mixer to stir material A in the A bucket at a uniform speed. If there is 50 kg of material A, stir for 10 minutes; if there is 100 kg of material A, stir for 20 minutes; if there is 200 kg of material A, stir for 30 minutes; if there is 1000 kg of material A, stir for 50 minutes.

[0029] S2. While mixing material A, prepare an aqueous solution of material B on-site. The preparation method includes, but is not limited to, the following steps:

[0030] S21. When the ambient temperature is 20℃, add clean water to the B material tank. The water temperature is room temperature.

[0031] The ratio of S22 and B materials to water is 11-20:100. Add them to water and stir clockwise at a constant speed for 20 minutes. Foam will appear at this time, which does not require treatment.

[0032] S23, pause for 10-15 minutes, then stir again for 5 minutes;

[0033] S24. Wait 5 minutes until the foam in the water completely disappears;

[0034] S25. Stir at a constant speed for another 5 minutes, then set aside.

[0035] After the coatings are mixed, components A and B are tested. The steps are as follows:

[0036] S1. Take two 100ml cups. Put 10g of ingredient A into one cup and 50ml of water into the other cup. Add 8-10g of ingredient B and stir well.

[0037] S2. Slowly pour material B into the cup containing material A, stirring clockwise at a constant speed while adding.

[0038] S3. As material A gradually forms a ball, remove the ball of material A, knead it multiple times, squeeze out excess water, and stretch it.

[0039] S4. Observe whether material A is elastic. If material A clumps together and is elastic, it meets the requirements. Otherwise, replace the material until it meets the requirements.

[0040] Equipment installation:

[0041] Applied to the above-mentioned two-component paint spraying machine,

[0042] S1. Select the number of spray guns according to the construction area, replace the spray pipe with one of appropriate length according to the construction environment, and select two nozzles with the same equivalent orifice diameter for the same spray gun.

[0043] S2, the feed pipe of the A material dual-chamber diaphragm pump is connected to the A material tank, the feed pipe of the B material dual-chamber diaphragm pump is connected to the B material tank, and the air inlet and outlet pipes of the pneumatic motor are connected to the air supply system, which makes the pneumatic motor rotate.

[0044] Spraying method:

[0045] S1. Turn on the air supply system, open the lever wrench of the A material control valve and the lever wrench of the B material control valve, and adjust the knob of the A material control valve and the knob of the B material control valve so that the ratio of the A material nozzle flow rate to the B material nozzle flow rate of the spray gun is 8 to 15:1.

[0046] S2. Aim at the object or interface and pull the trigger to make the mixture of material A and material B adhere to the object or interface.

[0047] S3. The spraying process proceeds from low to high, from left to right, and from far to near.

[0048] S4. Spray the first coat horizontally, the second coat vertically, and finally spray in a cross pattern until the required thickness is achieved. Attached Figure Description

[0049] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0050] Figure 1 This is a schematic diagram of the structure of Embodiment 1;

[0051] Figure 2 for Figure 1 A partial view;

[0052] Figure 3 for Figure 2 Rear view;

[0053] Figure 4 This is a schematic diagram of the structure of the A material control valve or the B material control valve in Example 1;

[0054] Figure 5 for Figure 4 Internal structure diagram;

[0055] Figure 6 This is a schematic diagram of the spray gun structure in Example 1;

[0056] Figure 7 for Figure 6 A bottom view;

[0057] Figure 8 This is a split view of the nozzle in Example 1;

[0058] Figure 9 for Figure 8 A schematic diagram of the disassembled middle filter element;

[0059] Figure 10 This is a schematic diagram of the spray core structure in Example 1;

[0060] Figure 11 for Figure 10 A bottom view;

[0061] Figure 12 for Figure 10 Sectional view of AA.

[0062] In the attached drawings of Embodiment 1, the components are: base 1, pneumatic motor 2, A-material control valve 3, A-material dual-chamber diaphragm pump 4, B-material control valve 5, B-material dual-chamber diaphragm pump 6, spray gun 7, double-groove pulley 8, first single-groove pulley 9, second single-groove pulley 10, A-material discharge pipe 11, B-material discharge pipe 12, valve body 13, adjusting pipe 14, valve core 15, lever wrench 16, knob 17, left discharge pipe 18, right discharge pipe 19, return pipe 20, return hole 21, flow hole 22, and manual valve 2. 3. Pressure gauge 24. Spring 25. Guide tube 26. Limiting rod 27. Nozzle 28. Handle 29. Trigger 30. Material A regulating valve 31. Material B regulating valve 32. Pull rod 33. Spray pipe 34. Upper nut 35. Spray core 36. Filter element 37. Connecting pipe 38. Through hole 39. V-groove 40. Straight cut 41. Filter screen 42. Bottom cover 43. Support cage 44. Front plate 45. Rear plate 46. Liquid outlet 47. Feed pipe 48. Branch pipe 49. Crossbar 50. Detailed Implementation

[0063] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0064] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by those skilled in the art to which this invention pertains.

[0065] Example 1:

[0066] like Figures 1 to 3 As shown, Embodiment 1 provides a two-component paint spraying machine, including a base 1, a pneumatic motor 2, an A-component control valve 3, an A-component dual-chamber diaphragm pump 4, a B-component control valve 5, a B-component dual-chamber diaphragm pump 6, and a spray gun 7. The pneumatic motor 2, the A-component dual-chamber diaphragm pump 4, and the B-component dual-chamber diaphragm pump 6 are all mounted on the base 1, and the output shaft of the pneumatic motor 2 is drivenly connected to the input shaft of the A-component dual-chamber diaphragm pump 4 and the input shaft of the B-component dual-chamber diaphragm pump 6, respectively. Specifically, the output shaft of the pneumatic motor 2 is provided with a double-groove pulley 8, the input shaft of the A-component dual-chamber diaphragm pump 4 is provided with a first single-groove pulley 9, and the input shaft of the B-component dual-chamber diaphragm pump 6 is provided with a second single-groove pulley 10, and the first single-groove pulley 9 and the second single-groove pulley 10 are identical; each groove of the double-groove pulley 8 is drivenly connected to the first single-groove pulley 9 and the second single-groove pulley 10 via a belt.

[0067] In this embodiment, the outlet of the A-material dual-chamber diaphragm pump 4 is connected to the inlet of the A-material control valve 3, and the outlet of the B-material dual-chamber diaphragm pump 6 is connected to the inlet of the B-material control valve 5. The A-material control valve 3 is equipped with an A-material outlet pipe 11 and an A-material return pipe, and the B-material control valve 5 is equipped with a B-material outlet pipe 12 and a B-material return pipe. In addition, the A-material dual-chamber diaphragm pump 4 is equipped with an inlet pipe 48, and the B-material dual-chamber diaphragm pump 6 is also equipped with an inlet pipe 48.

[0068] like Figure 4 , Figure 5 As shown, in this embodiment, the A-material control valve 3 has two A-material outlet pipes 11, and the B-material control valve 5 has two B-material outlet pipes 12. Therefore, two spray guns 7 can be equipped, and the two spray guns 7 can be used simultaneously to improve construction efficiency. Alternatively, a single spray gun 7 can be used without affecting the other. The A-material control valve 3 and the B-material control valve 5 have the same structure, and their specific structures are as follows:

[0069] Both the A-material control valve 3 and the B-material control valve 5 include a valve body 13, a regulating pipe 14, a valve core 15, a lever wrench 16, and a knob 17. The valve body 13 has an inlet, a left outlet pipe 18, a right outlet pipe 19, and a return pipe 20 on its rear, left, right, and upper sides, respectively. The lower part of the regulating pipe 14 is connected to the return pipe 20 via a threaded seal. For the A-material control valve 3, the left outlet pipe 18 and right outlet pipe 19 are collectively referred to as the A-material outlet pipe 11. Similarly, for the B-material control valve 5, the left outlet pipe 18 and right outlet pipe 19 are collectively referred to as the B-material outlet pipe 12. A return hole 21 is provided on the side of the return pipe 20, and a branch pipe 49 for connection is provided on the side wall of the return pipe 20. The side wall of the regulating pipe 14 is provided with a flow hole 22 corresponding to the return hole 21. The lever wrench 16 is fixedly sleeved on the outside of the regulating pipe 14. By rotating the regulating pipe 14 with the lever wrench 16, the return hole 21 and the flow hole 22 are aligned or misaligned, thereby opening or closing the return hole 21. Each left discharge pipe 18 and right discharge pipe 19 is provided with a manual valve 23, and a pressure gauge 24 communicating with the inner cavity of the valve body 13 is provided on the front side of the valve body 13. The valve core 15 is slidably connected to the inside of the regulating pipe 14. The knob 17 is threadedly connected to the upper end of the regulating pipe 14, and the valve core 15 and the knob 17 are connected by a spring 25. By rotating the knob 17, the effective area of ​​the valve core 15 blocking the flow hole 22 is changed, thereby adjusting the flow rate of the return hole 21. Furthermore, the cross-sectional shape of the valve core 15 is T-shaped, and the inner cavity of the valve body 13 is provided with a guide tube 26 coaxial with the valve core 15. The lower part of the valve body 13 is slidably sealed in the guide tube 26. The knob 17 has a downward-facing limiting rod 27 inside, and the upper end of the valve core 15 has a limiting boss. The two ends of the spring 25 are respectively sleeved on the limiting rod 27 and the limiting boss. The method of using the control valve is to first rotate the adjusting tube 14 90° clockwise by using the lever wrench 16 to align the return hole 21 and the flow hole 22. Then rotate the knob 17, and the knob 17 moves down, the spring 25 presses down on the valve core 15, so that the valve core 15 slowly blocks the return hole 21, reducing the return flow of the paint, thereby increasing the discharge pressure of the left discharge pipe 18 and the right discharge pipe 19, that is, increasing the spraying distance and spraying volume. Conversely, rotating the knob 17 in the opposite direction reduces the spraying distance and spraying volume. If it is necessary to close the return port 21 and adjust the spray distance and spray volume to the maximum, rotate the regulating pipe 14 counterclockwise to misalign the return port 21 and the flow port 22. Two control methods are used for the flow rate adjustment and opening / closing of the paint return. Only the flow rate adjustment is controlled by the valve core 15, which reduces wear and extends service life.

[0070] The specific structure of the spray gun 7 in this embodiment is as follows:

[0071] like Figure 6 , Figure 7As shown, the spray gun 7 includes a nozzle 28, a handle 29, a trigger 30, an A-material regulating valve 31, and a B-material regulating valve 32. Both the A-material regulating valve 31 and the B-material regulating valve 32 are fixedly connected to the front of the handle 29. The upper end of the trigger 30 is hinged to the handle 29, and the middle part of the trigger 30 is hinged to the pull rods 33 at the rear ends of the A-material regulating valve 31 and the B-material regulating valve 32 via a crossbar 50. Pulling the trigger 30 causes the two pull rods 33 to move backward synchronously, thereby synchronously adjusting the valve opening of the A-material regulating valve 31 and the B-material regulating valve 32. Both the front opening of the A-material regulating valve 31 and the front opening of the B-material regulating valve 32 are equipped with spray pipes 34, and each spray pipe 34 has a nozzle 28 at its front end. Furthermore, the spray pipes 34 are detachably connected between the spray gun 7 and the nozzle 28 via threads, allowing for replacement of spray pipes 34 of appropriate length according to the available workspace, making construction more convenient. The two nozzles 34 are made of corrosion-resistant metal and can be bent manually. By bending the two nozzles 34 toward the middle, the included angle between the two nozzles 28 can be changed.

[0072] The specific structure of the nozzle 28 in this embodiment is as follows:

[0073] like Figure 8 , Figures 10 to 12 As shown, each nozzle 28 has the same structure, including an upper nut 35, a spray element 36, a filter element 37, and a connecting pipe 38. The upper end of the connecting pipe 38 is provided with an external thread that matches the upper nut 35. The spray element 36 and the filter element 37 are connected sequentially between the upper nut 35 and the connecting pipe 38. The spray element 36 is cylindrical in shape, and a through hole 39 is provided along the center line of the spray element 36. The equivalent orifice diameter of the through hole 39 is 0.66mm, 1.8mm, or 2.5mm. A radially extending V-shaped groove 40 is provided on the top of the spray element 36, and the V-shaped groove 40 intersects with the through hole 39. Both ends of the V-shaped groove 40 are provided with straight cut surfaces 41 that are inclined toward the center of the spray element 36. Through the V-shaped groove 40, the through hole 39, and the straight cut surfaces 41, the sprayed paint is made to be fan-shaped.

[0074] The A-material regulating valve 31 and B-material regulating valve 32 of the spray gun 7 are connected to the A-material outlet pipe 11 and the B-material outlet pipe 12 respectively. Since the V-shaped grooves 40 of the two nozzles 28 are parallel, the spraying direction of the nozzles 28 of the two spray pipes 34 is consistent. After bending the two spray pipes 34 towards the middle, the sprayed fan-shaped A-material and fan-shaped B-material intersect and mix. The included angle between the two spray pipes 34 (nozzles 28) can also be changed to change the distance between the intersecting area and the spray gun 7. The smaller the included angle, the farther the distance between the intersecting area and the spray gun 7.

[0075] The specific structure of filter element 37 in this embodiment is as follows:

[0076] like Figure 9As shown, the filter element 37 includes a filter screen 42, a bottom cover 43, and a support cage 44. The support cage 44 has a front plate 45 and a rear plate 46 at its front and rear ends, respectively. The filter screen 42 is wrapped between the front plate 45 and the rear plate 46, thus forming a filter chamber. The front plate 45 has a liquid outlet hole 47 communicating with the filter chamber. The bottom cover 43 is detachably connected to the rear end of the rear plate 46 via a threaded connection, used to clamp the filter screen 42 between the front plate 45 and the rear cover. The rear end face of the spray element 36 is adapted to the front plate 45. Through the mating of the front cover and the rear cover, the spray element 36 and the front plate 45 are in sealed contact, as are the front plate 45 and the front cover. The paint enters the filter chamber through the filter screen 42 and finally flows out through the outlet hole 47. The filter screen 42 intercepts impurities and hardened sprayed materials on its outer side, preventing the nozzle of the spray gun 7 from becoming clogged and ensuring the filtration effect. Since the inner side of the filter screen 42 is in contact with the support plate, when the pressure increases, the pressure on the filter screen 42 is transmitted to the support plate, which bears the pressure, thereby greatly improving the pressure resistance of the filter screen 42, that is, increasing the maximum pressure that the entire filter element 37 can withstand.

[0077] In this embodiment, a pneumatic motor 2 is selected to replace the existing internal combustion engine, electric motor, etc., which does not generate sparks or current, is safe and reliable, greatly reduces the risk of operation, and meets the requirements of underground coal mine construction.

[0078] Example 2:

[0079] Example 2 provides a method for spraying a two-component coating, wherein the two-component coating consists of component A and component B, component A is loaded into component A container and component B is loaded into component B container.

[0080] To meet the requirements for fire prevention, explosion prevention, and seepage prevention in underground coal mines, this embodiment makes the following improvements to material A and material B:

[0081] Material A is composed of quick-setting anionic emulsified asphalt with flame-retardant and antistatic properties and anionic synthetic rubber latex. The quick-setting anionic emulsified asphalt with flame-retardant and antistatic properties has a mass content of 53%–67%; the quick-setting anionic emulsified asphalt with flame-retardant and antistatic properties is obtained from raw materials comprising the following weight percentages:

[0082] The asphalt comprises 35%–45%, anionic emulsifier 0.2%–1.4%, stabilizer 0.2%–0.4%, synthetic rubber 6.5%–19.5%, and flame retardant and antistatic agent 6%–12%; the asphalt is 50#, 70#, or 90# heavy-duty petroleum asphalt or 50# building petroleum asphalt, and the aromatic content of the asphalt is not less than 45%.

[0083] The anionic emulsifier is a carboxylate, sulfonate, or sulfate salt, including but not limited to at least one of sodium oleate, sodium rosinate, sodium laurate, sodium naphthenate, sodium stearate, lauric acid soap, lignin sulfonate, sulfonated tall oil soap, sulfonated succinic acid, sodium dodecyl sulfate, potassium disproportionated rosinate, and sodium dodecylbenzene sulfonate.

[0084] The stabilizers include, but are not limited to, sodium carboxymethyl cellulose, sodium hydroxide, potassium hydroxide, hydroxyethyl cellulose, polyvinyl alcohol, polyacrylamide, and polyethylene glycol.

[0085] Synthetic rubbers include, but are not limited to, at least one of styrene-butadiene rubber, chloroprene rubber, cis-butadiene rubber, nitrile rubber, butyl styrene rubber, silicone rubber, fluororubber, SBS elastomer, acrylic rubber, SIS block copolymer, ethylene propylene diene monomer (EPDM) rubber, and EPDM rubber.

[0086] The flame retardants and antistatic agents include, but are not limited to, decabromodiphenyl ether, tetrabromobisphenol A, octabromoether, decabromodiphenyl ethane, tetrabromoether, brominated polystyrene, hexabromocyclododecane, chlorinated paraffin, CPE, phosphate esters, phosphites, phosphonates, organophosphates, phosphorus heterocyclic compounds, polymeric phosphate esters, red phosphorus, phosphates, ammonium polyphosphate, melamine, dicyandiamide, zinc borate, sodium antimonate, sodium metasilicate, tetrapolyacrylamide, potassium nitrite guanidine carbonate, guanidine phosphate, condensed guanidine phosphate, guanidine aminosulfonate, aluminum hydroxide, and magnesium hydroxide.

[0087] Material B is selected from at least one of the following: polyether demulsifiers, quaternary ammonium salt demulsifiers, polydimethylammonium chloride demulsifiers, inorganic salt demulsifiers, calcium chloride demulsifiers, magnesium aluminum silicate demulsifiers, polyacrylamide demulsifiers, polyaluminum chloride demulsifiers, magnesium chloride demulsifiers, ferric chloride demulsifiers, aluminum sulfate demulsifiers, ferrous sulfate demulsifiers, and flame retardants and antistatic agents. The concentration of the aqueous solution of material B is typically 8-13%. Different types of material B have different solidification rates, and even within the same type, different concentrations of material B have different solidification rates; the higher the concentration, the faster the solidification rate.

[0088] Before spraying, materials A and B need to be mixed on-site. The mixing method is as follows:

[0089] Preparation of ingredient A: Use a mixer to stir ingredient A in the container at a uniform speed. If there is 50 kg of ingredient A, stir for 10 minutes; if there is 100 kg of ingredient A, stir for 20 minutes; if there is 200 kg of ingredient A, stir for 30 minutes; if there is 1000 kg of ingredient A, stir for 50 minutes.

[0090] Preparation of Component B: While mixing Component A, prepare an aqueous solution of Component B on-site. The preparation method includes, but is not limited to, the following steps:

[0091] Step 1: When the ambient temperature is 20℃, add clean water to the B material tank. The water temperature should be room temperature.

[0092] Step 2: The ratio of material B to water is 11-20:100. Add the material to the water and stir clockwise at a constant speed for 20 minutes. Foam will appear at this time, which does not require treatment.

[0093] Step 3: After a 10-15 minute interval, stir again for 5 minutes;

[0094] Step 4: Wait 5 minutes until the foam in the water completely disappears;

[0095] Step 5: Stir at a constant speed for another 5 minutes, then set aside.

[0096] After materials A and B are prepared on-site, the following verifications are required:

[0097] S1. Take two 100ml cups. Put 10g of ingredient A into one cup and 50ml of water into the other cup. Add 8-10g of ingredient B and stir well.

[0098] S2. Slowly pour material B into the cup containing material A, stirring clockwise at a constant speed while adding.

[0099] S3. As material A gradually forms a ball, remove the ball of material A, knead it multiple times, squeeze out excess water, and stretch it.

[0100] S4. Observe whether material A is elastic. If material A clumps together and is elastic, it meets the requirements. Otherwise, replace the material until it meets the requirements.

[0101] This embodiment is based on the two-component paint spraying machine of Embodiment 1, and the following installation is required:

[0102] First, select the number of spray guns based on the construction area, and change the spray pipe to an appropriate length according to the construction environment, as well as two nozzles with the same equivalent orifice diameter. For example, in some narrow construction environments, a longer spray pipe should be selected. Different equivalent orifice diameters result in different central angles for the fan-shaped spray pattern, ranging from 15° to 65°. The larger the central angle, the larger the sprayed area. Select an appropriate equivalent orifice diameter based on the construction conditions, but the equivalent orifice diameters of the two nozzles on the same spray gun must be consistent to ensure that the coverage area of ​​material A and material B is the same, and the overlapping area is also the same, ensuring a good mixing effect. Then, connect the feed pipe of the material A dual-chamber diaphragm pump to the material A tank, and the feed pipe of the material B dual-chamber diaphragm pump to the material B tank. Connect the air inlet and outlet pipes of the pneumatic motor to the air supply system, which will drive the pneumatic motor.

[0103] The spraying method is as follows:

[0104] S1. Turn on the air supply system, open the lever wrench of the A material control valve and the lever wrench of the B material control valve, and adjust the knob of the A material control valve and the knob of the B material control valve so that the ratio of the A material nozzle flow rate to the B material nozzle flow rate of the spray gun is 8 to 15:1.

[0105] S2. Aim at the object or interface and pull the trigger to make the mixture of material A and material B adhere to the object or interface.

[0106] S3. The spraying process proceeds from low to high, from left to right, and from far to near.

[0107] S4. Spray the first coat horizontally, the second coat vertically, and finally spray in a cross pattern until the required thickness is achieved.

[0108] The spraying method in this embodiment uses component A, which is flame-retardant, anti-static, and has a short curing time. The mixture of component A and component B does not generate heat, meeting the safety requirements for underground coal mine construction. Rapid spraying of the coating on walls, ventilation doors, and walls of goaf-side roadways effectively isolates air, oxygen, and methane, addressing the flammable and explosive issues underground at their source and significantly improving the safety of underground coal mine construction.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A two-component paint spraying machine; characterized in that: The device includes a base, a pneumatic motor, an A-material control valve, an A-material dual-chamber diaphragm pump, a B-material control valve, a B-material dual-chamber diaphragm pump, and a spray gun; the pneumatic motor, the A-material dual-chamber diaphragm pump, and the B-material dual-chamber diaphragm pump are all mounted on the base, and the output shaft of the pneumatic motor is respectively connected to the input shaft of the A-material dual-chamber diaphragm pump and the input shaft of the B-material dual-chamber diaphragm pump. The outlet of the A-material dual-chamber diaphragm pump is connected to the inlet of the A-material control valve, and the outlet of the B-material dual-chamber diaphragm pump is connected to the inlet of the B-material control valve. The A-material control valve is equipped with an A-material outlet pipe and an A-material return pipe, and the B-material control valve is equipped with a B-material outlet pipe and a B-material return pipe. The spray gun includes a nozzle, a handle, a trigger, an A-material regulating valve, and a B-material regulating valve. The A-material regulating valve and the B-material regulating valve are both fixedly connected to the front of the handle. The upper end of the trigger is hinged to the handle, and the middle part of the trigger is hinged to the pull rods at the rear ends of the A-material regulating valve and the B-material regulating valve. By pulling the trigger, the two pull rods move backward synchronously, thereby synchronously adjusting the valve opening of the A-material regulating valve and the valve opening of the B-material regulating valve. Both the front opening of the A material regulating valve and the front opening of the B material regulating valve are equipped with spray pipes, and each spray pipe has a nozzle at its front end. Each nozzle has the same structure, including an upper nut, a spray core, a filter element, and a connecting tube. The upper end of the connecting tube has an external thread that matches the upper nut, and the lower end of the connecting tube is connected to the upper end of the spray nozzle. The spray core and the filter element are connected sequentially between the upper nut and the connecting tube. The spray core is cylindrical in shape and has a through hole along its center line. The equivalent orifice diameter of the through hole is 0.66mm, 1.8mm, or 2.5mm. The top of the spray core has a radially extending V-shaped groove that intersects with the through hole. The two ends of the V-shaped groove have straight cut surfaces that are inclined towards the center of the spray core. Through the V-shaped groove, the through hole, and the straight cut surfaces, the sprayed paint is fan-shaped. The A-material regulating valve and B-material regulating valve of the spray gun are respectively connected to the A-material outlet pipe and the B-material outlet pipe. The two spray pipes are bent towards the middle, and the V-shaped grooves of the two nozzles are parallel, so that the sprayed fan-shaped A-material and fan-shaped B-material intersect and mix. The A material control valve is equipped with two A material outlet pipes, and the B material control valve is equipped with two B material outlet pipes; The A-material control valve and the B-material control valve have the same structure, and both include a valve body, a regulating pipe, a valve core, a lever, and a knob. The valve body has an inlet, a left outlet pipe, a right outlet pipe, and a return pipe on its rear, left, right, and upper sides, respectively. The lower part of the regulating pipe is connected to the return pipe by a threaded seal. The return pipe has a return hole on its side, and the regulating pipe has a flow hole corresponding to the return hole on its side wall. The lever is fixedly sleeved on the outside of the regulating pipe. By rotating the regulating pipe with the lever, the return hole and the flow hole are aligned or misaligned, thereby opening or closing the return hole. Each left outlet pipe and right outlet pipe is equipped with a manual valve, and a pressure gauge communicating with the inner cavity of the valve body is located on the front side of the valve body. The valve core is slidably connected to the inside of the regulating pipe, and the knob is threaded to the upper end of the regulating pipe. The valve core and the knob are connected by a spring. By rotating the knob, the effective area of ​​the valve core blocking the flow hole is changed, thereby adjusting the flow rate of the return hole.

2. The two-component paint spraying machine according to claim 1, characterized in that: The valve core has a T-shaped cross-section, and the valve body has a guide tube coaxial with the valve core in its inner cavity. The lower part of the valve body is slidably sealed in the guide tube.

3. The two-component paint spraying machine according to claim 2, characterized in that: The knob has a downward-facing limiting rod inside, and the upper end of the valve core has a limiting boss. The two ends of the spring are respectively fitted onto the limiting rod and the limiting boss.

4. The two-component paint spraying machine according to claim 1, characterized in that: The filter element includes a filter screen, a bottom cover, and a support cage; the front end and the rear end of the support cage are respectively provided with a front plate and a rear plate, and the filter screen is wrapped between the front plate and the rear plate, thereby forming a filter chamber with the front plate, the rear plate, and the filter screen; the front plate is provided with a liquid outlet hole communicating with the filter chamber, and the bottom cover is detachably connected to the rear end of the rear plate to clamp the filter screen between the front plate and the bottom cover.

5. The two-component paint spraying machine according to claim 1, characterized in that: The output shaft of the pneumatic motor is equipped with a double-groove pulley, the input shaft of the A-material dual-chamber diaphragm pump is equipped with a first single-groove pulley, and the input shaft of the B-material dual-chamber diaphragm pump is equipped with a second single-groove pulley, and the first single-groove pulley and the second single-groove pulley are identical; each groove of the double-groove pulley is connected to the first single-groove pulley and the second single-groove pulley via a belt.

6. A method for spraying a two-component coating, characterized in that: Including material bucket A and material bucket B, The A-material bucket contains A-material, which is composed of quick-setting anionic emulsified asphalt with flame-retardant and antistatic functions and anionic synthetic rubber latex; the mass content of the quick-setting anionic emulsified asphalt with flame-retardant and antistatic functions is 53% to 67%. The quick-setting anionic emulsified asphalt with flame-retardant and antistatic properties is made from raw materials comprising the following weight percentages: The composition comprises 35%–45% asphalt, 0.2%–1.4% anionic emulsifier, 0.2%–0.4% stabilizer, 6.5%–19.5% synthetic rubber, and 6%–12% flame retardant and antistatic agent, with the balance being water; the asphalt is 50#, 70#, or 90# heavy-duty petroleum asphalt or 50# building petroleum asphalt, and the aromatic content of the asphalt is not less than 45%. The anionic emulsifier includes at least one of sodium oleate, sodium rosinate, sodium laurylate, sodium naphthenate, sodium stearate, lauric acid soap, lignin sulfonate, sulfonated tall oil soap, sulfonated succinic acid, sodium dodecyl sulfate, potassium disproportionated rosinate, and sodium dodecylbenzene sulfonate. The stabilizers include sodium carboxymethyl cellulose, sodium hydroxide, potassium hydroxide, hydroxyethyl cellulose, polyvinyl alcohol, polyacrylamide, and polyethylene glycol; The synthetic rubber includes at least one of styrene-butadiene rubber, chloroprene rubber, cis-butadiene rubber, nitrile rubber, butyl styrene rubber, silicone rubber, fluororubber, SBS elastomer, acrylic rubber, SIS block copolymer, ethylene propylene rubber, and EPDM rubber. The flame retardants and antistatic agents include decabromodiphenyl ether, tetrabromobisphenol A, octabromoether, decabromodiphenyl ethane, tetrabromoether, brominated polystyrene, hexabromocyclododecane, chlorinated paraffin, CPE, phosphate esters, phosphites, phosphonates, organophosphates, phosphorus heterocyclic compounds, polymeric phosphate esters, red phosphorus, phosphates, ammonium polyphosphate, melamine, dicyandiamide, zinc borate, sodium antimonate, sodium metasilicate, tetrapolyacrylamide, potassium nitrite guanidine carbonate, guanidine phosphate, condensed guanidine phosphate, guanidine aminosulfonate, aluminum hydroxide, and magnesium hydroxide; The B material container contains B material, which is selected from at least one of the following: polyether demulsifier, quaternary ammonium salt demulsifier, polydimethylammonium chloride demulsifier, inorganic salt demulsifier, calcium chloride demulsifier, magnesium aluminum silicate demulsifier, polyacrylamide demulsifier, polyaluminum chloride demulsifier, magnesium chloride demulsifier, ferric chloride demulsifier, aluminum sulfate demulsifier, ferrous sulfate demulsifier, and flame retardant and antistatic agent. Coating mixing: S1. Use a mixer to stir material A in the A bucket at a uniform speed. If there is 50 kg of material A, stir for 10 minutes; if there is 100 kg of material A, stir for 20 minutes; if there is 200 kg of material A, stir for 30 minutes; if there is 1000 kg of material A, stir for 50 minutes. S2. While mixing material A, prepare an aqueous solution of material B on-site. The preparation method includes the following steps: S21. When the ambient temperature is 20℃, add clean water to the B material tank. The water temperature is room temperature. The ratio of S22 and B materials to water is 11-20:

100. Add them to water and stir clockwise at a constant speed for 20 minutes. Foam will appear at this time, which does not require treatment. S23, pause for 10-15 minutes, then stir again for 5 minutes; S24. Wait 5 minutes until the foam in the water completely disappears; S25. Stir at a constant speed for another 5 minutes, then set aside. Equipment installation: Applied to the two-component paint spraying machine of claim 1, S1. Select the number of spray guns according to the construction area, replace the spray pipe with one of appropriate length according to the construction environment, and select two nozzles with the same equivalent orifice diameter for the same spray gun. S2, the feed pipe of the A material dual-chamber diaphragm pump is connected to the A material tank, the feed pipe of the B material dual-chamber diaphragm pump is connected to the B material tank, and the air inlet and outlet pipes of the pneumatic motor are connected to the air supply system, which makes the pneumatic motor rotate. Spraying method: S1. Turn on the air supply system, open the lever wrench of the A material control valve and the lever wrench of the B material control valve, and adjust the knob of the A material control valve and the knob of the B material control valve so that the ratio of the A material nozzle flow rate to the B material nozzle flow rate of the spray gun is 8 to 15:

1. S2. Aim at the object or interface and pull the trigger to make the mixture of material A and material B adhere to the object or interface. S3. The spraying process proceeds from low to high, from left to right, and from far to near. S4. Spray the first coat horizontally, the second coat vertically, and finally spray in a cross pattern until the required thickness is achieved.

7. The spraying method for the two-component coating according to claim 6, characterized in that: After the coatings are mixed, components A and B are tested. The steps are as follows: S1. Take two 100ml cups. Put 10g of ingredient A into one cup and 50ml of water into the other cup. Add 8-10g of ingredient B and stir well. S2. Slowly pour material B into the cup containing material A, stirring clockwise at a constant speed while adding. S3. As material A gradually forms a ball, remove the ball of material A, knead it multiple times, squeeze out excess water, and stretch it. S4. Observe whether material A is elastic. If material A clumps together and is elastic, it meets the requirements. Otherwise, replace the material until it meets the requirements.

Images