Solvent-free self-luminous two-component acrylic road marking paint and marking machine

Abstract

This invention discloses a solvent-free, self-luminous, two-component acrylic road marking paint and a marking machine, belonging to the field of road marking technology. The road marking paint is composed of paint A and paint B in a 1-3:1 ratio. Paint A consists of the following components by weight: 35-50 parts active resin, 8-25 parts titanium dioxide, 0.3-1.5 parts composite anti-settling agent, 8-25 parts calcium carbonate, 25-38 parts modified glass microspheres, 2-5 parts accelerator, and 3-55 parts other additives. Paint B consists of the following components by weight: 35-50 parts active resin, 8-25 parts titanium dioxide, 0.3-1.5 parts composite anti-settling agent, 8-25 parts calcium carbonate, 25-38 parts modified glass microspheres, 2-5 parts initiator, and 3-55 parts other additives. The active resin consists of the following components by weight: 65-80 parts methyl methacrylate, 15-30 parts butyl acrylate, 3-8 parts functional monomers, and 2-6 parts OPE wax. The present invention provides a solvent-free, self-luminous, two-component acrylic road marking paint that can solve the problem of short reflectivity after the application of existing road marking paints.

Description

Technical Field

[0001] This invention relates to the field of road marking technology, specifically to solvent-free self-luminous two-component acrylic road marking paint and marking machine. Background Technology

[0002] Road markings are mainly applied to the road surface to regulate the passage of vehicles and pedestrians, ensuring that they follow their designated lanes without interfering with each other and guaranteeing safe and smooth traffic flow.

[0003] Current road marking paints can only spread a layer of glass microbeads on the surface of the markings during construction. However, the glass microbeads on the surface are quickly worn away by passing vehicles, resulting in a short reflective effect of the markings and seriously affecting safe driving.

[0004] Therefore, it is necessary to provide a new solvent-free, self-luminous, two-component acrylic road marking paint and marking machine. Summary of the Invention

[0005] Based on the aforementioned problems in the existing technology, the purpose of this invention is to provide a solvent-free, self-luminous, two-component acrylic road marking paint that can solve the problem of short reflectivity after the application of existing marking paints.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a solvent-free, self-luminous, two-component acrylic road marking paint, wherein the two-component raised road marking paint is composed of paint A and paint B in a ratio of 1-3:1, wherein: The coating A is composed of the following components in parts by weight: 35-50 parts of active resin, 8-25 parts of titanium dioxide, 0.3-1.5 parts of composite anti-settling agent, 8-25 parts of calcium carbonate, 25-38 parts of modified glass microspheres, 2-5 parts of accelerator and 3-55 parts of other additives. The coating B is composed of the following components in parts by weight: 35-50 parts of active resin, 8-25 parts of titanium dioxide, 0.3-1.5 parts of composite anti-settling agent, 8-25 parts of calcium carbonate, 25-38 parts of modified glass microspheres, 2-5 parts of initiator and 3-55 parts of other additives. The modified glass microspheres are prepared by the following method: ethanol and γ-aminopropyltriethoxysilane are weighed at a volume ratio of 3:1, stirred evenly to obtain a γ-aminopropyltriethoxysilanol solution, and then the solution is sprayed onto the reflective glass microspheres to wet the reflective glass microspheres. After drying, the modified glass microspheres are obtained.

[0007] The active resin is composed of the following components in parts by weight: 65-80 parts of methyl methacrylate, 15-30 parts of butyl acrylate, 3-8 parts of functional monomer, and 2-6 parts of OPE wax. The functional monomer is a difunctional monomer, which is formed by reacting acrylic acid and diol in a molar ratio of 2:1.

[0008] Furthermore, the coating A is composed of the following components in parts by weight: 38-45 parts of active resin, 10-20 parts of titanium dioxide, 0.3-1.2 parts of composite anti-settling agent, 10-20 parts of calcium carbonate, 28-35 parts of modified glass microspheres, 2-5 parts of accelerator and 10-50 parts of other additives.

[0009] Furthermore, the active resin comprises 38-45 parts, titanium dioxide 10-20 parts, composite anti-settling agent 0.3-1.2 parts, calcium carbonate 10-20 parts, modified glass microspheres 28-35 parts, initiator 2-5 parts, and other additives 10-50 parts.

[0010] This invention also provides a road marking machine suitable for applying the aforementioned solvent-free, self-luminous, two-component acrylic road marking paint. The marking machine includes a spray gun, which comprises a gun body, a nozzle assembly, a valve seat, a valve core, a trigger, and an elastic element. The gun body has a central hole and a feed channel communicating with the central hole. The valve core and valve seat are sequentially housed within the central hole from the inside out. The valve seat has a discharge hole communicating with the central hole and the discharge channel. The nozzle assembly is detachably mounted at the front end of the gun body and blocks the valve seat from moving away from the valve core. At one end, the nozzle assembly has a discharge channel communicating with the discharge port and connected to the external environment. A valve core is slidably engaged with the center hole. An elastic element is positioned between the valve core and the nozzle body, applying a spring force to the valve core towards the valve seat. A trigger is rotatably engaged with the nozzle body via a rotating shaft. A lever is protruding from the circumferential wall of the rotating shaft. When the trigger is rotated in a first direction, causing the lever to swing away from the valve core and away from the valve seat, the lever pushes the valve core away from the valve seat, thus disengaging the valve core and opening the discharge port on the valve seat, allowing the feed to pass through. The feed channel is connected to the discharge port. When the trigger is rotated in the second direction, causing the lever to swing from the direction of the valve core towards the valve seat, the lever disengages from the valve core. This causes the valve core to slide towards the valve seat under the action of the elastic element, thereby causing the end of the valve core near the valve seat to abut against and close the discharge port on the valve seat, thus blocking the connection between the feed channel and the discharge port. Furthermore, the nozzle assembly is equipped with a limiting arm. When the nozzle assembly and the gun body are in place, and the end of the valve core near the valve seat abuts against and closes the discharge port on the valve seat, the lever abuts against the side of the valve core away from the elastic element, causing... The lever resists the elastic force of the elastic element and prevents the valve core from continuing to slide. The trigger abuts against the limiting arm, which prevents the trigger from continuing to rotate in the second direction. In addition, when the nozzle assembly is removed from the gun body from the direction away from the valve core, the limiting arm's restriction on the trigger's rotation in the second direction is lifted, so that the trigger can drive the lever to continue rotating in the second direction, causing the lever to disengage from the valve core. This removes the lever's restriction on the valve core's sliding towards the valve seat. In this way, while the nozzle assembly is being removed, the valve seat and valve core can move outward from the central hole in sequence.

[0011] Furthermore, the inner diameter of the central hole is equal everywhere from the valve seat to the valve core, or the inner diameter of the central hole increases from the valve seat to the valve core.

[0012] Furthermore, the rotating shaft is located on one side of the central hole and is perpendicular to the valve core. The valve core has a relief groove on its peripheral sidewall, and a stepped wall is provided on the side of the relief groove facing the valve seat. When the lever rotates and approaches the valve core, the lever can abut against the stepped wall. When the lever rotates and pushes the stepped wall, it will apply a thrust to the valve core from the valve seat to the valve core, pushing the valve core away from the valve seat. That is, when the trigger is rotated in the first direction, the lever can be driven to swing from the valve core away from the valve seat, and the lever can push the valve core away from the valve seat, thereby causing the valve core to disengage and open the discharge hole on the valve seat, so that the feed channel is connected to the discharge hole. When the lever rotates away from the valve core, the valve core will move closer to the valve seat under the elastic force of the elastic element. When the valve core is completely misaligned with the stepped wall, the valve core can continue to push the valve seat outward from the central hole because it slides axially and loses the obstruction of the lever. When the nozzle assembly is removed, the valve seat and valve core can be disengaged from the central hole in sequence.

[0013] Furthermore, the end of the valve seat facing the valve core is limited and abutted against the center hole of the gun body.

[0014] Furthermore, the nozzle assembly includes a nozzle seat, a sealing seat, and a nut. The nozzle seat has a receiving hole at its center, the sealing seat is received in the receiving hole of the nozzle seat, and the side of the sealing seat facing the valve seat is limited and abuts against the nozzle seat.

[0015] Furthermore, the nut can at least partially be fitted onto one end of the gun body near the nozzle assembly, and the outer peripheral surface of the gun body near the nozzle assembly is provided with a threaded portion that helically engages with the nut.

[0016] Furthermore, the limiting arm is fixed to the nut.

[0017] The beneficial effects of this invention are as follows: This invention provides a solvent-free, self-luminous, two-component acrylic road marking paint, wherein glass microspheres are modified and premixed in an active resin component. The active resin is selected not only by modifying the glass microspheres with γ-aminopropyltriethoxysilane, making them easier to fuse with the active resin, but also by adding trioctyl phosphate to the anti-settling agent, resulting in better anti-settling effect. At the same time, the use of the above-mentioned improved active resin enhances the rheological properties of the paint. The preparation of the active resin improves the suspension properties of the paint, solving the problem of glass bead sedimentation during the paint preparation process, so that the road markings applied by the marking paint of this invention can continuously produce reflective effects. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a perspective view of a spray gun provided in an embodiment of the present invention, showing one usage state of the spray gun.

[0020] Figure 2 The left view of the spray gun provided in an embodiment of the present invention.

[0021] Figure 3 For along Figure 2 A cross-sectional view along the EE direction.

[0022] Figure 4 This is an exploded view of the spray gun provided in an embodiment of the present invention.

[0023] Figure 5 for Figure 3 An enlarged schematic diagram of region A in the middle.

[0024] Figure 6 This is a three-dimensional structural diagram of the valve core provided in an embodiment of the present invention.

[0025] Figure 7 This is a cross-sectional view of the valve seat provided in an embodiment of the present invention.

[0026] Figure 8 This is a schematic diagram showing the positional relationship between the nozzle seat and the nut provided in an embodiment of the present invention.

[0027] Figure 9 This is a schematic diagram of the sealing seat provided in an embodiment of the present invention.

[0028] Figure 10 A three-dimensional structural diagram of the nozzle provided in an embodiment of the present invention.

[0029] Figure 11 This is a perspective view of a spray gun provided in an embodiment of the present invention, showing another usage state of the spray gun.

[0030] Figure 12 for Figure 11 The spray gun shown is a cross-sectional view.

[0031] The reference numerals in the figures are as follows: 100, spray gun; 1, gun body; 11, center hole; 12, shaft hole; 13, threaded part; 14, feed connector; 2, nozzle assembly; 21, nozzle seat; 211, receiving hole; 212, insertion hole; 213, slot; 22, sealing seat; 221, outer conical surface; 222, slot; 223, discharge channel; 23, nut; 231, locking protrusion; 232, limiting arm; 24, nozzle; 241, nozzle channel; 3, valve seat; 31, discharge hole; 32, inner conical surface; 33, feed port; 4, valve core; 41, plug; 42, clearance groove; 43, stepped wall; 5, trigger; 51, limiting groove; 52, rotating shaft; 53, lever; 6, elastic element. Detailed Implementation

[0032] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0033] It should be noted that when a component is referred to as "connected to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0036] Throughout this specification, reference to "an embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of this application. Therefore, the phrases "in one embodiment," "in some embodiments," or "in some of these embodiments" appear in various places throughout the specification, and not all refer to the same embodiment. Furthermore, in one or more embodiments, a particular feature, structure, or characteristic may be combined in any suitable manner.

[0037] Example 1 An active resin, the raw materials of which include: 75g methyl methacrylate, 25g butyl acrylate, 5g TPGDA, and 6g OPE wax.

[0038] The preparation method of this active resin includes: Weigh out methyl methacrylate, butyl acrylate, and TPGDA according to the formula, put them into a reaction vessel, control the reaction temperature at 60℃, and stop the reaction when the viscosity reaches 21-25s. Then add the prescribed amount of OPE wax to obtain the active resin component.

[0039] Example 2 An active resin, the raw materials of which include: 70g methyl methacrylate, 20g butyl acrylate, 3g HDDA, 3g OPE wax.

[0040] The preparation method of this active resin includes: Weigh out methyl methacrylate, butyl acrylate, and HDDA according to the formula, put them into a reaction vessel, control the reaction temperature at 50℃, and stop the reaction when the viscosity reaches 21-25s. Then add the formula amount of OPE wax to obtain the active resin component.

[0041] Example 3 An active resin, the raw materials of which include: 72g of methyl methacrylate, 23g of butyl acrylate, 4g of TPGDA, and 4g of OPE wax.

[0042] The preparation method of this active resin includes: Weigh out methyl methacrylate, butyl acrylate, and TPGDA according to the formula, put them into a reaction vessel, control the reaction temperature at 70℃, and stop the reaction when the viscosity reaches 21-25s. Then add the formula amount of OPE wax to obtain the active resin component.

[0043] Example 4 A solvent-free, self-luminous, two-component acrylic road marking paint, the raw materials of which include: Coating A: 45g of active resin (prepared by the method of Example 1), 10g of titanium dioxide, 1.2g of the composite anti-settling agent, 10g of calcium carbonate, 35g of modified glass microspheres, 5g of benzoyl peroxide, 10g of polyether defoamer, and 25g of colorant.

[0044] Coating B: 45g of active resin (prepared by the method of Example 1), 10g of titanium dioxide, 1.2g of the composite anti-settling agent, 10g of calcium carbonate, 35g of modified glass microspheres, 5g of p-toluenesulfonic acid, 10g of polyether defoamer, and 25g of colorant.

[0045] The composite anti-settling agent is composed of trioctyl phosphate and organic soil in a weight ratio of 4:6.

[0046] The modified glass microspheres were prepared by the following method: ethanol and γ-aminopropyltriethoxysilane were weighed at a volume ratio of 3:1, stirred evenly to obtain a γ-aminopropyltriethoxysilanol solution, and then the solution was sprayed onto the reflective glass microspheres to wet the reflective glass microspheres. After drying, the modified glass microspheres were obtained.

[0047] The preparation method of this solvent-free, self-luminous, two-component acrylic road marking paint includes: Weigh the active resin component and other ingredients in the coating formulation according to the specified ratio, namely titanium dioxide, trioctyl phosphate, calcium carbonate, modified glass microspheres, and other additives. Mix the active resin with titanium dioxide, trioctyl phosphate, calcium carbonate, and other additives at a stirring speed of 500 rpm. Then add the modified glass microspheres and mix evenly at a stirring speed of 50 rpm to obtain the final product.

[0048] The application method for this solvent-free, self-luminous, two-component acrylic road marking paint includes: mixing paint A and paint B in a 2:1 ratio, and then applying it via airless spraying.

[0049] Example 5 A solvent-free, self-luminous, two-component acrylic road marking paint, the raw materials of which include: Coating A: 38g of active resin (prepared by the method of Example 2), 10g of titanium dioxide, 0.3g of composite anti-settling agent, 10g of calcium carbonate, 28g of modified glass microspheres, 3g of benzoyl peroxide, 6g of polyether defoamer, and 30g of colorant.

[0050] Coating B: 38g of active resin (prepared by the method of Example 2), 10g of titanium dioxide, 0.3g of composite anti-settling agent, 10g of calcium carbonate, 28g of modified glass microspheres, 3g of p-toluenesulfonyl chloride, 6g of polyether defoamer, and 30g of colorant.

[0051] The composite anti-settling agent is composed of trioctyl phosphate and organic soil in a weight ratio of 4:6.

[0052] The modified glass microspheres are prepared by the following method: ethanol and γ-aminopropyltriethoxysilane are weighed at a volume ratio of 3:1, stirred evenly to obtain a γ-aminopropyltriethoxysilanol solution, and then the solution is sprayed onto the reflective glass microspheres to wet the reflective glass microspheres. After drying, the modified glass microspheres are obtained.

[0053] The preparation method of this solvent-free, self-luminous, two-component acrylic road marking paint includes: Weigh the active resin component and other ingredients in the coating formulation according to the specified ratio, namely titanium dioxide, trioctyl phosphate, calcium carbonate, modified glass microspheres, and other additives. Stir the active resin with titanium dioxide, trioctyl phosphate, calcium carbonate, and other additives at a speed of 200 rpm. Then add the modified glass microspheres and mix evenly at a stirring speed of 30 rpm.

[0054] The application method for this solvent-free, self-luminous, two-component acrylic road marking paint includes: mixing paint A and paint B in a 3:1 ratio, and then applying it via airless spraying.

[0055] Example 6 A solvent-free, self-luminous, two-component acrylic road marking paint, the raw materials of which include: Coating A: 40g of active resin (prepared by the method of Example 3), 15g of titanium dioxide, 0.8g of composite anti-settling agent, 15g of calcium carbonate, 32g of modified glass microspheres, 2g of benzoyl peroxide, 10g of polyether defoamer, and 40g of colorant.

[0056] Coating B: 40g of active resin (prepared by the method of Example 2), 15g of titanium dioxide, 0.8g of composite anti-settling agent, 15g of calcium carbonate, 32g of modified glass microspheres, 2g of p-toluenesulfonyl chloride, 10g of polyether defoamer, and 40g of colorant.

[0057] The composite anti-settling agent is composed of trioctyl phosphate and organic soil in a weight ratio of 4:6.

[0058] The modified glass microspheres are prepared by the following method: ethanol and γ-aminopropyltriethoxysilane are weighed at a volume ratio of 3:1, stirred evenly to obtain a γ-aminopropyltriethoxysilanol solution, and then the solution is sprayed onto the reflective glass microspheres to wet the reflective glass microspheres. After drying, the modified glass microspheres are obtained.

[0059] The preparation method of this solvent-free, self-luminous, two-component acrylic road marking paint includes: Weigh out the active resin component and other ingredients in the coating formulation, namely titanium dioxide, trioctyl phosphate, calcium carbonate, modified glass microspheres, and other additives. Stir the active resin with titanium dioxide, trioctyl phosphate, calcium carbonate, and other additives at a speed of 600 rpm. Then add the modified glass microspheres and mix evenly at a speed of 80 rpm.

[0060] The application method for this solvent-free, self-luminous, two-component acrylic road marking paint includes: mixing paint A and paint B in a 1:1 ratio, and then applying the paint using an airless spray marking machine.

[0061] In the embodiments of the present invention: Calcium carbonate is prepared in the following proportions: 400-500 mesh, 500-600 mesh, 600-700 mesh, 700-800 mesh, 800-900 mesh, and 900-1000 mesh, in a ratio of 1-2:1-2:1-2:1-2:1-2:1-2:1-2. The functional monomer is a difunctional monomer, which is produced by reacting acrylic acid and diol in a molar ratio of 2:1, such as TPGDA (tripropylene glycol diacrylate) or HDDA (1,6-hexanediol diacrylate).

[0062] Example 7 like Figure 1-12As shown, this embodiment of the invention also provides a road marking machine, which is suitable for applying the solvent-free self-luminous two-component acrylic road marking paint provided in any of the above embodiments. The road marking machine includes a high-pressure pump and a spray gun 100. The high-pressure pump is used to extract the road marking paint and pressurize it. At the same time, the high-pressure pump delivers the high-pressure road marking paint to the spray gun 100, where the spray gun 100 atomizes and sprays the road marking paint to achieve the marking work. The spray gun 100 includes a gun body 1, a nozzle assembly 2, a valve seat 3, a valve core 4, a trigger 5, and an elastic element 6. The gun body 1 has a central hole 11 inside, and a feed channel 141 communicating with the central hole 11 is provided on the gun body 1. The feed channel 141 is used to receive the road marking paint. The valve core 4 and the valve seat 3 are sequentially housed in the central hole 1 from the inside out. In part 1, the valve seat 3 has a discharge hole 31 connecting the central hole 11 and the discharge channel 223. The nozzle assembly 2 is detachably mounted on the front end of the gun body 1 and blocks the end of the valve seat 3 away from the valve core 4. The nozzle assembly 2 has a discharge channel 223 communicating with the discharge hole 31 and communicating with the external environment, so that the marking paint in the discharge channel 223 can be sprayed out to the external environment. The valve core 4 is slidably engaged with the central hole 11. The elastic element 6 is disposed between the valve core 4 and the gun body 1, and the elastic element 6 applies a spring force to the valve core 4 pointing towards the valve seat 3. The trigger 5 is rotatably engaged with the gun body 1 via the rotating shaft 52, and a lever 53 is protruding on the peripheral wall of the rotating shaft 52. Rotating the trigger 5 in the first direction drives the lever 53 away from the valve core 4. When the lever 53 swings away from the valve seat 3, it pushes the valve core 4 away from the valve seat 3, causing the valve core 4 to disengage and open the discharge hole 31 on the valve seat 3. This connects the feed channel 141 with the discharge hole 31, allowing the marking paint to be sprayed out sequentially through the feed channel 141, the discharge hole 31, and the discharge channel 223. When the trigger 5 is rotated in the second direction, causing the lever 53 to swing from the direction where the valve core 4 is close to the valve seat 3, the lever 53 disengages from the valve core 4. This causes the valve core 4 to slide towards the valve seat 3 under the action of the elastic element 6. This causes the end of the valve core 4 near the valve seat 3 to abut against and close the discharge hole 31 on the valve seat 3, blocking the connection between the feed channel 141 and the discharge hole 31. Thus, the spraying is switched on and off by rotating the trigger 5, and the nozzle... The component 2 is equipped with a limiting arm 232. When the nozzle assembly 2 and the gun body 1 are installed in place, and the valve core 4 near the valve seat 3 abuts against and closes the discharge port 31 on the valve seat 3, the lever 53 abuts against the side of the valve core 4 away from the elastic element 6. This causes the lever 53 to resist the elastic force of the elastic element 6 and prevent the valve core 4 from continuing to slide. The trigger 5 abuts against the limiting arm 232, preventing the trigger 5 from continuing to rotate in the second direction. Thus, through the limiting arm 232's restraint on the trigger 5 and the lever 53's restraint on the valve core 4, the valve core 4 can be stably and securely abutted against the valve seat 3. Furthermore, when the nozzle assembly 2 is removed from the gun body 1 from the valve seat 3 away from the valve core 4, the limiting arm 232's restraint on the trigger 5's rotation in the second direction is released.Thus, trigger 5 can drive the lever 53 to continue rotating in the second direction, causing lever 53 to disengage from valve core 4, and removing the limiting action of lever 53 on valve core 4 sliding towards valve seat 3. In this way, while removing nozzle assembly 2, valve seat 3 and valve core 4 can sequentially move outward from the central hole 11. Because the marking paint provided in this embodiment of the invention is pre-mixed with glass microspheres, the paint particles are larger, making flow more easily obstructed. The spray gun 100 and the marking machine equipped with it provided in this embodiment of the invention facilitate maintenance of the valve core 4, valve seat 3, nozzle assembly 2, feed channel 141, and central hole 11 through which the paint passes, enabling rapid cleaning in case of blockage. The first direction and the second direction are clockwise and counterclockwise, respectively.

[0063] It should be noted that when the nozzle assembly 2 and the gun body 1 are installed in place, and the end of the valve core 4 near the valve seat 3 abuts against and closes the discharge hole 31 on the valve seat 3, the lever 53 abuts against the side of the valve core 4 away from the elastic element 6, so that the lever 53 resists the elastic force of the elastic element 6 and prevents the valve core 4 from continuing to slide. The trigger 5 abuts against the limit arm 232, so that the limit arm 232 prevents the trigger 5 from continuing to rotate in the second direction. This can prevent the valve core 4 from being excessively squeezed by the elastic force of the elastic element 6, causing irreversible deformation between the valve seat 3 and the valve core 4, and causing the sealing and abutting effect between the valve seat 3 and the valve core 4 to fail. This is because the elastic element 6 needs to have a large elastic force to resist the pressure exerted by the high-pressure marking paint on the valve core 4 from the direction away from the valve seat 3.

[0064] like Figure 3 and Figure 12 As shown, in some embodiments, the inner diameter of the central hole 11 is equal everywhere from the valve seat 3 to the valve core 4, or the inner diameter of the central hole 11 increases from the valve seat 3 to the valve core 4. This ensures that the valve seat 3 and the valve core 4 installed in the central hole 11 can move outward from the central hole 11 in sequence, and the part of the central hole 11 where the valve seat 3 is installed will not obstruct the passage of the valve core 4.

[0065] like Figure 1 and Figure 3 As shown, in some embodiments, the outer wall of the gun body 1 is provided with a feed connector 14, which is connected to the outer port of the feed channel 141.

[0066] like Figure 5 and Figure 6As shown, in some embodiments, the rotating shaft 52 is located on one side of the central hole 11 and is perpendicular to the valve core 4. The valve core 4 has a relief groove 42 on its peripheral sidewall, and a stepped wall 43 is provided on the side of the relief groove 42 facing the valve seat 3. When the lever 52 rotates closer to the valve core 4, the lever 52 can abut against the stepped wall 43. When the lever 52 rotates and pushes against the stepped wall 43, it applies a thrust to the valve core 4 from the valve seat 3 towards the valve core 4, pushing the valve core 4 away from the valve seat 3. That is, when the trigger 5 is rotated in the first direction, causing the lever 53 to swing away from the valve core 4 towards the valve seat 3, the lever 53 can push the valve core 4 away from the valve seat 3, thereby causing the valve core 4 to disengage and open the discharge hole 31 on the valve seat 3, connecting the feed channel 141 with the discharge hole 31. When the lever 52 rotates away from the valve core 4, the valve core 4 moves closer to the valve seat 3 under the elastic force of the elastic element 6, such as... Figure 12 As shown, when the lever 52 is completely offset from the step wall 43, the valve core 4 slides axially and loses the obstruction of the lever 52, so the valve core 4 can continue to push the valve seat 3 out of the center hole 11. When the nozzle assembly 2 is removed, the valve seat 3 and the valve core 4 can be dislodged from the center hole 11 in sequence.

[0067] like Figure 4 As shown, in some embodiments, the gun body 1 is provided with a shaft hole 12 perpendicular to the central hole 11, the shaft hole 12 is located on one side of the central hole 11, and the rotating shaft 52 is rotatably installed in the shaft hole 12.

[0068] In some embodiments, the shaft hole 12 communicates with the center hole 11 so that the paddle 53 on the rotating shaft 52 can contact the valve core 4 in the center hole 11.

[0069] like Figure 3 As shown, in some embodiments, one end of the central hole 11 is closed and the other end is open, wherein the end of the central hole 11 away from the nozzle assembly 2 is closed.

[0070] In some embodiments, the end of the valve seat 3 facing the valve core 4 is limited and abutted against the center hole 11 of the gun body 1, thereby achieving installation and positioning of the valve seat 3 along the axial direction of the center hole 11. Specifically, in this embodiment, the valve seat 3 and the center hole 11 are limited by the cooperation of the limiting step.

[0071] like Figure 3 and Figure 4 As shown, in some embodiments, the nozzle assembly 2 includes a nozzle seat 21, a sealing seat 22, and a nut 23, such as Figure 8As shown, the nozzle seat 21 has a receiving hole 211 at its center. The sealing seat 22 is received in the receiving hole 211 of the nozzle seat 21, and the side of the sealing seat 22 facing the valve seat 3 is limited and abutted against the nozzle seat 21 to position the sealing seat 22 on the nozzle seat 21 in a direction close to the valve seat 3. Specifically, in this embodiment, the sealing seat 22 and the receiving hole 211 of the nozzle seat 21 are positioned by the cooperation of the limiting step.

[0072] like Figure 9 As shown, in some embodiments, the front end of the sealing seat 22 is provided with a slot 222 for installing the nozzle 24 used for spraying. At the same time, the nozzle seat 21 is provided with an insertion hole 212 extending along the direction of the vertical receiving hole 211. When the sealing seat 22 and the nozzle seat 21 are in place, the insertion hole 212 and the slot 222 are aligned, and the nozzle 24 can pass through the insertion hole 212 and the slot 222. Thus, when the nozzle 24 is installed, the nozzle 24 can limit the movement of the nozzle seat 21 away from the valve seat 3 along the axial direction of the nozzle seat 21.

[0073] like Figure 8 As shown, in some embodiments, the outer peripheral wall of the nozzle seat 21 is provided with an annular groove 213, and the inner peripheral wall of the nut 23 is provided with a radially inward protruding protrusion 231. The protrusion 231 is engaged in the groove 213, so that the nut 23 and the nozzle seat 21 are rotatably connected.

[0074] like Figure 7 and Figure 9 As shown, in some embodiments, the sealing seat 22 is provided with an outer conical surface 221 at one end near the valve seat 3, and the valve seat 3 is provided with an inner conical surface 32 that fits against the outer conical surface 221 of the sealing seat 22 at one end near the nozzle assembly 2, so as to form a seal between the valve seat 3 and the sealing seat 22, so that the coating can flow sequentially through the discharge hole 31 and the discharge channel 223.

[0075] like Figure 3 As shown, in some embodiments, the nut 23 can at least partially be sleeved on the end of the gun body 1 near the nozzle assembly 2. The outer peripheral surface of the gun body 1 near the nozzle assembly 2 is provided with a threaded portion 13 that is screwed into the nut 23. When the nut 23 is screwed into the gun body 1, the nozzle seat 21 and the sealing seat 22 can be driven to connect to the gun body 1, and the sealing seat 23 can be mated with the valve seat 3, so that the discharge hole 31 is connected and communicates with the discharge channel 223.

[0076] like Figure 4 and Figure 10 As shown, in some embodiments, a nozzle channel 241 is provided on the nozzle 24 along the axial direction of the discharge channel 223. One end of the nozzle channel 241 is connected to the discharge channel 223, and the other end of the nozzle channel 241 is connected to the external environment.

[0077] like Figure 6 and Figure 7 As shown, in some embodiments, the valve core 4 has a plug 41 at one end near the valve seat 3, and the valve seat 3 has a feed inlet 33 communicating with the feed inlet 31 at one end near the valve core 4. The shape of the plug 41 is adapted to the shape of the feed inlet 33 on the valve seat 3, so that when the plug 41 is aligned and fitted with the feed inlet 33, it can tightly seal the feed inlet 33. Specifically, in this embodiment, the feed inlet 33 is circular, and the plug 41 is a spherical structure.

[0078] In some embodiments, the limiting arm 232 is fixed to the nut 23.

[0079] In some embodiments, the trigger 5 is provided with a limiting groove 51 corresponding to the limiting arm 232. When the nozzle assembly 2 and the gun body 1 are installed in place, and the valve core 4 near the valve seat 3 abuts against and closes the discharge hole 31 on the valve seat 3, the limiting arm 232 abuts against the limiting groove 51 on the trigger 5, so that the limiting arm 232 prevents the trigger 5 from continuing to rotate in the second direction.

[0080] like Figure 1 and Figure 3 As shown, during normal operation of the spray gun 100, the trigger 5 is blocked by the limit arm 232, preventing the lever 53 from rotating completely away from the valve core 4. That is, the valve core 4 remains in contact with the lever 53. When a blockage occurs inside the spray gun 100, simply loosen the nut 23 and remove it from the gun body 1. Figure 11 and Figure 12 As shown, at this time, since the valve seat 3 loses the obstruction and limitation of the sealing seat 22, the trigger 5 loses the obstruction of the limiting arm 232, so that the trigger 5 can rotate and drive the paddle block 53 to completely disengage from the valve core 4, so that the valve core 4 loses the obstruction and limitation of the paddle block 53, and then the valve core 4 can slide out of the center hole 11 along the axial direction, thereby facilitating the cleaning and maintenance of the valve core 4, valve seat 3, nozzle assembly 2, feed channel 141 and center hole 11 through which the coating passes.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A road marking machine, suitable for applying road marking paint, characterized in that: The marking machine includes a spray gun, which comprises a gun body, a nozzle assembly, a valve seat, a valve core, a trigger, and an elastic element. The gun body has a central hole and a feed channel communicating with the central hole. The valve core and valve seat are sequentially housed within the central hole from the inside out. The valve seat has a discharge hole communicating with the central hole and the discharge channel. The nozzle assembly is detachably mounted at the front end of the gun body and blocks the end of the valve seat away from the valve core. The nozzle assembly has a discharge channel communicating with the discharge hole and is connected to the external environment. The valve core slides within the central hole. The elastic element is positioned between the valve core and the gun body, and applies a spring force to the valve core pointing towards the valve seat. The machine is rotatably mounted on the gun body via a rotating shaft, and a lever is protruding from the circumferential wall of the rotating shaft. When the trigger is rotated in the first direction, causing the lever to swing away from the valve core from the valve seat, the lever can push the valve core away from the valve seat, thereby disengaging the valve core and opening the discharge port on the valve seat, connecting the feed channel and the discharge port. When the trigger is rotated in the second direction, causing the lever to swing away from the valve core from the valve seat, the lever disengages from the valve core, causing the valve core to slide towards the valve seat under the action of the elastic element, thereby causing the end of the valve core near the valve seat to abut against and close the discharge port on the valve seat, blocking the connection between the feed channel and the discharge port. The nozzle assembly is also equipped with... When the nozzle assembly and gun body are installed in place, and the valve core near the valve seat abuts against and closes the discharge port on the valve seat, the stop arm abuts against the side of the valve core away from the elastic element. This causes the stop arm to resist the elastic force of the elastic element and prevent the valve core from sliding further. The trigger abuts against the stop arm, preventing the stop arm from rotating further in the second direction. Furthermore, when the nozzle assembly is removed from the gun body from the valve seat away from the valve core, the stop arm's restriction on the trigger's rotation in the second direction is released. This allows the trigger to drive the stop arm to continue rotating in the second direction, disengaging the stop arm from the valve core and releasing the stop arm's restriction on the valve core sliding towards the valve seat. Thus, while removing the nozzle assembly... The valve seat and valve core can move outward from the central hole in sequence. The inner diameter of the central hole is equal everywhere from the valve seat to the valve core. The nozzle assembly includes a nut, which can at least partially fit onto the end of the gun body near the nozzle assembly. A limiting arm is fixed on the nut. The rotating shaft is located on one side of the central hole and is perpendicular to the valve core. The peripheral wall of the valve core is provided with a relief groove. The side of the relief groove facing the valve seat is provided with a stepped wall. When the lever rotates away from the valve core, the valve core moves closer to the valve seat under the elastic force of the elastic element. When the lever is completely misaligned with the stepped wall, the valve core slides axially upward and loses the obstruction of the lever. The valve core can continue to push the valve seat outward from the central hole.

2. The marking machine according to claim 1, characterized in that: The inner diameter of the central hole is equal everywhere from the valve seat to the valve core, or the inner diameter of the central hole increases from the valve seat to the valve core.

3. The marking machine according to claim 1, characterized in that: When the lever rotates and approaches the valve core, the lever can abut against the stepped wall. When the lever rotates and pushes against the stepped wall, it will exert a thrust on the valve core from the valve seat to the valve core, pushing the valve core away from the valve seat and sliding. That is, when the trigger is rotated in the first direction, the lever will swing from the valve core away from the valve seat, and the lever can push the valve core away from the valve seat and slide, thereby disengaging the valve core and opening the discharge hole on the valve seat, so that the feed channel and the discharge hole are connected.

4. The marking machine according to claim 1, characterized in that: The end of the valve seat facing the valve core is limited and abutted against the center hole of the gun body.

5. The marking machine according to claim 1, characterized in that: The nozzle assembly includes a nozzle seat and a sealing seat. The nozzle seat has a receiving hole at its center. The sealing seat is received in the receiving hole of the nozzle seat, and the side of the sealing seat facing the valve seat is limited and abuts against the nozzle seat.

6. The marking machine according to claim 1, characterized in that: The gun body has a threaded portion on the outer peripheral surface near the nozzle assembly that engages with the nut.

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