A multi-component coating device for engineering construction

Abstract

The present invention relates to a multi-component coating device for engineering construction, and relates to the technical field of coating equipment, including a carrying trolley, on which are arranged a pre-cleaning component, a pre-coating component, a first curing component, a multi-component cross-linking coating component, a second curing component and a scraping component that cooperate with each other to perform multi-process coating on the surface to be coated, and the pre-cleaning component can pre-clean the surface to be coated; the primary mixing pipe of the multi-component cross-linking coating component can mix and blend the component coatings, and the output end of the primary mixing pipe is connected to a central shunt and voltage stabilizing mechanism that can control pressure and stabilize flow, and a plurality of primary mixing pipes connected in parallel perform cross-linking mixing of different component coatings through a secondary mixing mechanism. The present invention can improve the mixing uniformity and sufficiency of the multi-component coating, and can also control the process of cross-linking mixing by adjusting the flow rate and conveying path of the mixed multi-component coating, thereby realizing controllable short-time curing of the coating.

Description

Technical Field

[0001] The invention relates to the technical field of coating equipment, and in particular to a multi-component coating device for engineering construction. Background Art

[0002] Paint is a very important product in the chemical industry, and almost all substrate surfaces require coating protection. Different coatings require different construction methods according to different application scenarios to achieve the best coating effect. The construction quality of the paint is the key to ensuring the performance of the paint, and has an important impact on the appearance and performance of the paint film. With the development of the times and the advancement of science and technology, the construction methods are also keeping pace with the times and changing with each passing day. Paint construction has developed from the initial small manual workshops to today's mechanized, automated, and intelligent operations. Therefore, choosing a suitable construction method can not only improve the utilization rate and construction efficiency of the paint, but also ensure the quality of the coating film, give full play to the protective and decorative role of the paint, and at the same time improve the construction environment and labor intensity.

[0003] The construction methods of coatings include manual tool coating, mechanical equipment coating and intelligent coating. Manual tool coating is a more traditional coating method, mainly brushing, scraping, rolling, etc. Mechanical equipment coating is the most widely used type of coating at present. Automated coating is a rapidly developing coating method, with the characteristics of mechanization, continuity, automation and intelligence. Automated construction methods can be connected with pre-treatment, drying and other processes to form a professional coating production line, such as electrophoretic coating and electrostatic coating. These three types of coating methods have their own characteristics. Manual tool coating is inefficient, but convenient and flexible. It is still used for pre-coating or small-batch coating before large-scale coating, while mechanical equipment and automated coating are efficient, have good coating effects, and are suitable for large-scale coating.

[0004] Multi-component coatings refer to a type of coating that is made up of two or more different components that are mixed and applied to the surface of an object, and then form a coating film through chemical reactions. The reason why multi-component coatings are not directly produced and mixed into a single component is that after the multiple components are mixed, the coating will undergo a chemical reaction in a very short time to form a solidified coating film. This process is not reversible, and the coating loses its construction performance.

[0005] Publication number CN107661824A discloses a multi-component spray paint gun mixing device, the input end is connected to a paint feed pipe of several components, the output end is connected to the spray paint gun, and includes several sections of mixing pipes for conveying paint, a mixer is provided in the mixing pipe, and the mixer is provided with several blades for stirring. The multi-component spray paint gun mixing device of the device has a simple structure. By adopting a mixing pipe with a mixer, several component paint feed pipes can be connected as needed. The mixer is provided with blades for stirring. The blades rotate under the stress of paint flow to mix the paint evenly, reduce the time between mixing and spraying, and avoid mixing time too long to affect the performance of the paint. However, the device cannot adjust the supply amount and mixing intensity of the multi-component paint, cannot perform multi-stage mixing in batches, and cannot ensure the uniformity and effectiveness of cross-linking and mixing of multiple component paints.

[0006] Publication number CN118719357A discloses a novel dual-liquid nozzle, including a shell, a fixed groove is provided at the center of the shell, a spray assembly is arranged in the fixed groove, active cavities are provided at both ends of the fixed groove, a conveying assembly is arranged in each of the active cavities, the conveying assembly is connected to the spray assembly through a circulation groove, the conveying assembly includes a conduit, the surface of the conduit is slidably connected in the active cavity, a compression spring is sleeved on the surface of the conduit, a nozzle piston is arranged on the surface of the conduit, an O-ring A is also arranged on the surface of the conduit, and the spray assembly includes a circulation pipe arranged in the mounting groove, and an O-ring B is arranged on the surface of the circulation pipe. Although the nozzle can realize the synchronous spray output of dual liquids, the spraying of the two is relatively independent, and it cannot ensure that the coatings output by the two can be fully blended and mixed. It only realizes the spraying processing of the two materials on the same area in the same cycle, and cannot realize the uniform mixing of the two materials before coating.

[0007] Although existing spraying equipment usually has a variety of highly functional paint stirring and mixing structures, so that a variety of paint materials can be effectively stirred and mixed before spraying, due to the unique cross-linking, curing and film-forming properties of multi-component paints, it is impossible to stir and mix them in advance. The existing technology usually directly uses a dual-path spray pipeline to output simultaneously so that the paint component and the curing agent component automatically cross-link and mix in the space between the delivery pipeline and the surface to be painted, so that the component molecules gradually blend and mix with each other during the directional spraying movement, and then the paint component deposited on the surface to be painted reacts chemically with the curing agent component to form a cured coating film. However, due to the short movement time and path of the ejected molecules, the uniformity and sufficiency of the mixing cannot be effectively guaranteed, and it is very easy for the two substances to be sprayed in a sequential order, and they cannot be effectively cross-linked and mixed, resulting in uneven distribution of the curing agent component in the paint component, and the curing effect cannot be guaranteed. In addition, it is easy for the first-applied coating component and the later-sprayed curing agent to undergo surface curing, resulting in the inability of the underlying coating component to fully blend with the curing agent, resulting in a defect of poor curing completeness. Moreover, the existing external cross-linking mixing method cannot control the progress of the curing reaction, and cannot control the film formation speed after the coating is applied. The curing is time-consuming and unstable, which is not conducive to the continuous coating of subsequent film layers. Summary of the invention

[0008] The purpose of the present invention is to provide a multi-component coating device for engineering construction that can improve the mixing uniformity and sufficiency of the multi-component coating by completing the preparation, mixing and cross-linking mixing of the multi-component coating in stages during the directional conveying and supplying of materials, while controlling the progress of the cross-linking mixing and the degree of the pre-mixing reaction so that the multi-component coating can be quickly and fully cured into a film after being output, so as to solve the problem that the existing spraying equipment cannot effectively perform cross-linking mixing of the multi-component coating before coating, especially cannot control the progress of the cross-linking curing reaction while improving the mixing sufficiency and uniformity of the component coatings to ensure that the output multi-component coating can be quickly and fully cured into a film on the surface to be coated.

[0009] The technical solution adopted by the present invention is: a multi-component coating device for engineering construction, including a carrying trolley capable of directionally moving, on which are arranged a pre-cleaning component, a pre-coating component, a first curing component, a multi-component cross-linking coating component, a second curing component and a scraping component, which can cooperate with each other to perform multi-step coating on the surface to be coated, wherein the pre-cleaning component performs pre-cleaning on the surface to be coated in a manner that it can build a diverting exhaust channel and controllably output an inclined purge airflow; the primary mixing pipe of the multi-component cross-linking coating component is constructed in a manner that it can periodically separate and combine The component coatings are mixed in a variable volume pipeline, the output end of the primary mixing tube is connected to a central shunt and voltage stabilizing mechanism capable of controlling pressure and stabilizing flow, and multiple primary mixing tubes connected in parallel are cross-linked and mixed with different component coatings through a secondary mixing mechanism; the pre-coating component, the multi-component cross-linking coating component and the scraping coating component are constructed in a way of completing the stacking coating of multiple layers of coatings on the surface to be coated in stages, and the first curing component and the second curing component are accelerated in a way of interspersed in the multi-stage coating process to form a short-term curing film of the lower layer coating at different stages. Its advantage is that the present application can effectively adjust the curing reaction process after cross-linking and mixing, avoid the curing of the multi-component coating in the pipeline, reduce the difficulty of cleaning, and also accurately control the curing time point by adjusting the conveying rate and conveying path length of the mixed multi-component coating, so that the multi-component coating can be quickly cured and filmed after being coated on the surface to be coated, reduce the intermittent standing time, improve the stacking coating efficiency of the multi-layer coating, and avoid the defects such as bubbling in thick coating. Moreover, the present application can also quickly transfer the cross-linked mixed multi-component coating through high-pressure airflow, thereby ensuring the cleanliness of the mixing pipeline, avoiding the pipeline being blocked and the difficulty of later cleaning. And accurately supply the amount of multi-component coating required for coating, avoid the residue of some multi-component coatings that have completed cross-linking and mixing in the pipeline, reduce the waste of materials, and improve the utilization rate. In addition, the constructed high-speed flow channel can effectively improve the mixing uniformity of the component coatings, especially the traction and disturbance of the auxiliary airflow can accelerate the mutual mixing between different component coatings, improve the mixing adequacy, and effectively control the delivery time by constructing a pipeline with a variable path and length and adjusting the air pressure and flow rate of the auxiliary airflow, and control the progress of the cross-linking mixing reaction with high precision, so as to ensure that the multi-component coating can be accurately and short-term cured on the surface to be coated, and reduce the intermittent standing time.

[0010] According to a preferred embodiment, the multi-component cross-linking coating assembly includes a primary mixing tube, a primary feeding mechanism, a central shunt and pressure-stabilizing mechanism, a secondary mixing mechanism, an adjustable delivery pipe and a staggered array nozzle, wherein a primary feeding mechanism capable of uniform feeding is also sleeved on the branch pipe of the primary mixing tube, the primary mixing tube is connected to the secondary mixing mechanism through the central shunt and pressure-stabilizing mechanism capable of pressure regulating the component coating liquid flow outputted therefrom, and the component coating shunted by the central shunt and pressure-stabilizing mechanism can also be outputted through the secondary mixing mechanism, thereby compensating for the multi-component coating content deviation existing when the secondary mixing mechanism drives the multi-component coating that has completed cross-linking mixing to be air-sprayed and outputted; the output end of the secondary mixing mechanism is connected to the staggered array nozzle through the adjustable delivery pipe. The advantage is that the multi-component cross-linking coating assembly provided in the present application can avoid the disadvantages of pre-mixing of multi-component coatings by completing the formulation mixing and cross-linking mixing simultaneously during the conveying process, and construct a uniform multi-batch feeding mechanism while changing its flow state and flow rate multiple times during the flow process to improve the mixing uniformity and sufficiency, and it also controls the progress of cross-linking mixing and the degree of pre-mixing reaction by changing the conveying rate and conveying path, thereby controlling the curing time of the film layer, and realizing efficient and rapid curing of the uniformly mixed multi-component coating on the surface to be coated, reducing the intermittent solidification time while avoiding the risk of premature curing.

[0011] According to a preferred embodiment, the sleeve of the primary feeding mechanism is sleeved on the branch pipe, and the input end of the sleeve is connected to the primary feeding conveying pipe; the annular gap between the sleeve and the branch pipe is filled with an axially slidable cylindrical baffle, and the side of the cylindrical baffle away from the primary feeding conveying pipe is connected to a primary limit spring capable of limiting its initial position in the annular gap.

[0012] According to a preferred embodiment, the valve housing of the centrally placed shunt pressure-stabilizing mechanism is connected to the output end of the primary mixing tube through an inlet pipe port, and is also connected to the input end of the secondary mixing mechanism through an outlet pipe port; a valve core is movably inserted in the valve housing, and the end of the valve core away from the inlet pipe port is connected to a limit block through a valve core limit spring, and the limit block limits its working position by an adjusting rod penetrating the end face of the valve housing, thereby adjusting the compressive translational capacity of the valve core; a strip through-port is provided on the side wall of the valve housing blocked by the valve core, and the output end of the strip through-port is connected to a shunt pipe port.

[0013] According to a preferred embodiment, both air inlet ends of the dual-inlet air drive unit of the secondary mixing mechanism are connected with a mixing air inlet pipe, and the mixing air inlet pipe is adjustably connected with the external space and the material storage sub-chamber through the first inlet pipe and the second inlet pipe respectively; the dual-inlet air drive unit also directionally delivers pressurized airflow in a manner of constructing a single air inlet channel, so as to clean the multi-component coating in the confluence main shell at the end of spraying; the two output ends of the dual-inlet air drive unit are respectively connected with the inlet branches of the herringbone confluence pipe, and the output end of the herringbone confluence pipe is inserted on the confluence main shell; side-port mixing inlets respectively connected to different outlet pipe ports are symmetrically arranged on both sides of the confluence main shell, and a plurality of through holes are arrayed on the side wall of the confluence main shell wrapped by the side-port mixing inlets.

[0014] According to a preferred embodiment, the end side of the inner tube body of the adjustable delivery tube is connected to the axial lower end of the confluence main shell, and the inner tube body is movably inserted in the outer tube body, and a pressure push rod is passed through the insertion front end surface of the inner tube body, wherein one end of the pressure push rod is connected to a piston body capable of separating the tubular cavity space of the inner tube body, and a return spring capable of assisting in limiting its initial working position is also sleeved on the rod body of the pressure push rod when it is in the inner tube body; a plurality of parallel delivery tubes of different lengths are arranged at intervals on the side wall of the outer tube body, and the other ends of the plurality of parallel delivery tubes are connected to the guide tube, wherein the plurality of parallel delivery tubes are extended step by step in the direction close to the input port of the inner tube body, thereby forming parallel pipelines that can be selectively connected and have different path lengths.

[0015] According to a preferred embodiment, the input end of the confluence pipe of the primary mixing pipe is connected to a first material tank provided with a hydraulically driven pump, and the output end of the confluence pipe is connected to at least two branch pipes connected in parallel with each other, and the confluence pipes and branch pipes with different cross-sectional sizes of the pipe bodies are arranged alternately to jointly construct a variable-capacity pipeline that is periodically separated and combined.

[0016] According to a preferred embodiment, the main cross frame of the coating assembly is detachably mounted on the rear side of the carrying trolley, the main cross frame is connected to the driving platform via a vertical guide rail, and the top of the driving platform is connected with a main hydraulic rod capable of changing its suspension height.

[0017] According to a preferred embodiment, a driving module capable of synchronously driving two scraper mechanisms to rotate is installed on the driving platform, and the two scraper mechanisms adapt to the surface contour of the surface to be painted in a manner that they can elastically lift and lower to perform double scraping on the surface to be painted; a feeding valve head is also provided on the side of the vertical guide rail away from the driving platform.

[0018] According to a preferred embodiment, the negative pressure generating unit of the pre-cleaning component is connected to the forward purge port and the side purge port arranged in parallel through a diverter air supply pipe, so that the forward purge port and the side purge port cooperate to output an inclined airflow that can pre-clean the surface to be painted.

[0019] The beneficial effects of the present invention are:

[0020] The present application can effectively adjust the curing reaction process after cross-linking and mixing, avoid the multi-component coating from curing in the pipeline, reduce the difficulty of cleaning, and accurately control the curing time point by adjusting the delivery rate and delivery path length of the mixed multi-component coating, so that the multi-component coating can be quickly cured into a film after being applied to the surface to be coated, reduce the intermittent standing time, improve the stacking coating efficiency of the multi-layer coating, and avoid the defects such as bubbling in thick coating. In addition, the present application can also quickly transfer the cross-linked mixed multi-component coating through high-pressure airflow, thereby ensuring the cleanliness of the mixed pipeline, avoiding the pipeline from being blocked and the difficulty of cleaning later. And accurately supply the amount of multi-component coating required for coating, avoid the residue of some multi-component coatings that have completed cross-linking and mixing in the pipeline, reduce the waste of materials, and improve the utilization rate. In addition, the constructed high-speed flow channel can effectively improve the mixing uniformity of the component coatings, especially the traction and disturbance of the auxiliary airflow can accelerate the mutual mixing between the different component coatings and improve the mixing completeness. By constructing pipelines with variable paths and lengths and adjusting the air pressure and flow rate of the auxiliary airflow, the delivery time can be effectively controlled, and the progress of the cross-linking mixing reaction can be controlled with high precision, ensuring that the multi-component coating can be accurately and short-term cured on the surface to be coated, reducing the intermittent standing time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a preferred multi-component coating device for engineering construction proposed by the present invention;

[0022] Figure 2 This is a schematic structural diagram of a primary mixing pipe of a preferred multi-component coating device for engineering construction proposed by the present invention;

[0023] Figure 3 It is a structural schematic diagram of a preferred centrally-placed shunt and voltage-stabilizing mechanism of a multi-component coating device for engineering construction proposed by the present invention;

[0024] Figure 4 It is a structural schematic diagram of a secondary mixing mechanism of a preferred multi-component coating device for engineering construction proposed by the present invention;

[0025] Figure 5 It is a cross-sectional schematic diagram of a mixing air inlet pipe and a second inlet pipe of a preferred multi-component coating device for engineering construction proposed by the present invention;

[0026] Figure 6 It is a structural schematic diagram of an adjustable delivery pipe of a preferred multi-component coating device for engineering construction proposed by the present invention;

[0027] Figure 7 This is a schematic diagram of the planar distribution of through holes on the main confluence shell of a preferred multi-component coating device for engineering construction proposed by the present invention;

[0028] Figure 8 It is a structural schematic diagram of a first curing component of a preferred multi-component coating device for engineering construction proposed by the present invention.

[0029] Reference numerals list

[0030] 1: Carrying trolley; 2: Pre-cleaning assembly; 3: Pre-coating assembly; 4: First curing assembly; 5: Multi-component cross-linking coating assembly; 6: Second curing assembly; 7: Scraping assembly; 8: Material storage; 9: Hydraulic drive pump; 21: Negative pressure generating unit; 22: Diverter air pipe; 23: Forward purge port; 24: Side purge port; 31: First silo; 32: One-way pressurized discharge pipe; 33: Spraying plate; 41: First air pipe; 42: Air pump; 43: Heating silo ; 44: guide plate; 45: heating unit; 46: gradient exhaust strip; 51: primary mixing pipe; 52: primary feeding mechanism; 53: central flow shunt and pressure stabilizing mechanism; 54: secondary mixing mechanism; 55: adjustable delivery pipe; 56: staggered array nozzle; 511: confluence pipe; 512: branch pipe; 521: sleeve; 522: primary feeding and delivery pipe; 523: cylindrical baffle; 524: primary limit spring; 531: valve housing; 532: inlet pipe; 533 : Outflow pipe outlet; 534: Diverter pipe outlet; 535: Strip through-hole; 536: Valve core; 537: Valve core limit spring; 538: Limit block; 539: Adjustment plug rod; 541: Double inlet air drive unit; 542: Mixing air inlet pipe; 543: First inlet pipe; 544: Second inlet pipe; 545: Storage sub-chamber; 546: Herringbone manifold; 547: Manifold main shell; 548: Side port mixing inlet pipe; 551: Outer pipe body; 552: Inner pipe body; 553 : Parallel conveying pipe; 554: guide pipe; 555: connecting pipe head; 556: pressure push rod; 557: piston body; 558: return spring; 561: hollow conveying plate; 562: spraying end; 71: main cross frame; 72: vertical guide rail; 73: driving platform; 74: main hydraulic rod; 75: scraper mechanism; 76: driving module; 77: feeding valve head; 81: first material tank; 82: second material tank; 5121: feeding bar hole; 5471: through hole. DETAILED DESCRIPTION

[0031] The following is a detailed description with reference to the accompanying drawings.

[0032] The present application provides a multi-component paint coating device for engineering construction, which includes a carrying trolley 1, a pre-cleaning component 2, a pre-coating component 3, a first curing component 4, a multi-component cross-linking coating component 5, a second curing component 6, a scraping component 7, a material storage component 8 and a hydraulic drive pump 9.

[0033] according to Figure 1A specific embodiment is shown, in which the carrier trolley 1 can assist in completing a wide range of coating treatments by directional movement. A pre-cleaning component 2, a pre-coating component 3, a first curing component 4, a multi-component cross-linking coating component 5, a second curing component 6 and a scraping component 7 are arranged on the carrier trolley 1, which can cooperate with each other to perform multi-process coating on the surface to be coated. The pre-cleaning component 2 performs pre-cleaning on the surface to be coated in a manner that it can construct a diverting exhaust channel and controllably output an inclined purge airflow. The primary mixing tube 51 of the multi-component cross-linking coating component 5 mixes the component coatings in a manner that constructs a variable volume pipeline that is periodically separated and combined. The output end of the primary mixing tube 51 is connected to a centrally placed shunt and voltage stabilizing mechanism 53 that can control the pressure and stabilize the flow of the component coatings it mixes, and multiple mutually parallel primary mixing tubes 51 that output different component coatings perform cross-linking and mixing of different component coatings through a secondary mixing mechanism 54. The pre-coating component 3, the multi-component cross-linking coating component 5 and the scraping component 7 construct a composite coating in a manner of completing the stacking coating of multiple layers of coating on the surface to be coated in stages. Composite coating refers to a stacking combination of multiple different coatings. The first curing component 4 and the second curing component 6 can accelerate the short-time curing film formation of the lower layer coating at different stages in a manner interspersed in the multi-stage coating process, and assist in improving the stacking adhesion and multi-layer coating efficiency and coating quality between the layered coatings. The pre-cleaning component 2 provided in the present application can clean the surface to be coated before the coating process, improve the surface cleanliness, so that the coating can better adhere to the surface to be coated. The pre-coating component 3 provided in the present application can spray a surface enhancer that improves the adhesion effect of the coating on the surface to be coated, thereby improving the coating effect and durability, and improving the coating life. The first curing component 4 provided in the present application can dry the surface enhancer by a gradually warming gradient hot air flow, ensuring the drying effect while avoiding high-temperature evaporation. The multi-component cross-linked coating assembly 5 provided in the present application can avoid the disadvantages of pre-mixing of multi-component coatings by synchronously completing the mixing and cross-linking during the conveying process, and construct a uniform multi-batch feeding mechanism while changing its flow state and flow rate multiple times during the flow process to improve the mixing uniformity and sufficiency, and it also controls the progress of cross-linking mixing and the degree of pre-mixing reaction by changing the conveying rate and conveying path, thereby controlling the curing time of the film layer, and realizing the efficient and rapid curing of the uniformly mixed multi-component coating on the surface to be coated, reducing the intermittent solidification time while avoiding the risk of premature curing. The scraping assembly 7 provided in the present application can adapt to the complex surface contour of the surface to be coated in an adaptively adjustable manner, so as to uniformly and flatten the coating film layer on the surface to be coated. The double scraper structure of the scraping assembly 7 can effectively improve the scraping effect and quality, and can also make up for the defects of scraping pits and protrusions of a single scraper, and the double scraping operation can also effectively remove bubbles that may exist in thick coating operations.

[0034] The present application can effectively adjust the curing reaction process after cross-linking and mixing, avoid the multi-component coating from curing in the pipeline, reduce the difficulty of cleaning, and accurately control the curing time point by adjusting the delivery rate and delivery path length of the mixed multi-component coating, so that the multi-component coating can be quickly cured into a film after being applied to the surface to be coated, reduce the intermittent standing time, improve the stacking coating efficiency of the multi-layer coating, and avoid the defects such as bubbling in thick coating. In addition, the present application can also quickly transfer the cross-linked mixed multi-component coating through high-pressure airflow, thereby ensuring the cleanliness of the mixed pipeline, avoiding the pipeline from being blocked and the difficulty of cleaning later. And accurately supply the amount of multi-component coating required for coating, avoid the residue of some multi-component coatings that have completed cross-linking and mixing in the pipeline, reduce the waste of materials, and improve the utilization rate. In addition, the constructed high-speed flow channel can effectively improve the mixing uniformity of the component coatings, especially the traction and disturbance of the auxiliary airflow can accelerate the mutual mixing between the different component coatings and improve the mixing completeness. By constructing pipelines with variable paths and lengths and adjusting the air pressure and flow rate of the auxiliary airflow, the delivery time can be effectively controlled, and the progress of the cross-linking mixing reaction can be controlled with high precision, ensuring that the multi-component coating can be accurately and short-term cured on the surface to be coated, reducing the intermittent standing time.

[0035] Preferably, the multi-stage coating process includes at least three coating stages of a pre-coating component 3, a multi-component cross-linking coating component 5 and a scraping component 7, thereby forming a composite coating. Preferably, the lower coating is a coating formed by an upstream coating operation and is a primer for the next coating stage. Preferably, cross-linking mixing refers to a chemical reaction between the coating component and the curing agent component in the multi-component coating after mixing with each other, so that the coating is cured.

[0036] Preferably, the pre-cleaning assembly 2 includes a negative pressure generating unit 21, a diverter air supply pipe 22, a forward purge port 23 and a side-tilted purge port 24. Preferably, the negative pressure generating unit 21 is connected to the forward purge port 23 and the side-tilted purge port 24 arranged in parallel through a diverter air supply pipe 22 having at least three diverter exhaust ports, so that the forward purge port 23 and the side-tilted purge port 24 cooperate to output an inclined airflow that can pre-clean the surface to be painted. Preferably, pre-cleaning refers to the preliminary surface cleaning of the surface to be painted before the painting operation. Specifically, the axial lower end of the diverter air supply pipe 22 is provided with three diverter exhaust ports arranged in a triangular shape, thereby forming a diverter exhaust channel that can clean the surface to be painted, wherein the forward purge port 23 is connected to the diverter exhaust port near the head end of the carrying trolley 1. Preferably, the diverter exhaust channel refers to the construction of an exhaust branch to transport airflow to different purge ports. Specifically, the two side-tilted purge ports 24 are symmetrically installed on two parallel diverter exhaust ports, so that the planar inclined airflow output by the two side-tilted purge ports 24 is in the form of two adjacent side slopes of a triangular cone, thereby cleaning the impurities on the surface to be coated to both sides and improving the surface cleanliness. Specifically, the opening end of the forward-inclined purge port 23 is tilted forward, thereby forming a forward-inclined inclined purge airflow that forms an acute angle with the straight line defined by the direction of movement. The opening end of the side-tilted purge port 24 is tilted to both sides, thereby forming a side-tilted inclined purge airflow. The inclined purge airflow can form an acute angle with the surface to be coated, thereby directionally blowing impurities out of the surface to be coated during the lateral movement of the airflow. The negative pressure generating unit 21 provided in the present application can be an air pump or a nitrogen tank that drives an electromagnetic switch valve, etc.

[0037] Preferably, the pre-coating assembly 3 includes a first silo 31, a one-way pressurized discharge pipe 32 and a spray disc 33. Preferably, the first silo 31 is detachably placed in the bearing frame of the bearing trolley 1. Further preferably, the axial upper end of the first silo 31 is provided with a feeding port derived from the outside of the bearing frame. Preferably, the bottom of the first silo 31 is connected to the spray disc 33 embedded in the bearing bottom plate of the bearing trolley 1 through the one-way pressurized discharge pipe 32, so that the surface enhancer can be adjusted to the spray disc 33. Preferably, a plurality of atomizing nozzles are arranged in an array on the spray disc 33, so that the surface enhancer outputted therethrough can be effectively atomized, so that the atomized surface enhancer can be effectively sprayed on the surface to be coated, thereby improving the coating adhesion strength of the surface to be coated. Specifically, a surface enhancer capable of improving the surface coating performance of the surface to be coated is stored in the first silo 31 to ensure the stability and strength of the subsequent coating adhesion. Preferably, a one-way liquid flow pressurized delivery pump is disposed in the tube body of the one-way pressurized discharge tube 32, so as to force the surface enhancing agent to be output in a controllable and directional manner.

[0038] like Figure 8As shown, the first curing component 4 includes a first air supply pipe 41, an air pump 42, a heating chamber 43, a guide plate 44, a heating unit 45 and a gradient exhaust strip 46. Preferably, the heating chamber 43 is detachably embedded in the bearing bottom plate of the carrying trolley 1 in an inclined arrangement. Further preferably, the inclined lower side of the top surface of the heating chamber 43 is connected with a first air supply pipe 41 capable of conveying air to its inner cavity. Preferably, an air pump 42 capable of driving a directional flow of air is installed in the first air supply pipe 41. Further preferably, the top end of the first air supply pipe 41 can extend to the outside of the bearing frame of the carrying trolley 1, and a shielding umbrella body is provided at the port of the tube body to prevent debris and rainwater from falling into the tube cavity. Preferably, a guide plate 44 capable of defining a curved flow channel in its inner cavity is also provided in the heating chamber 43. Further preferably, the guide plate 44 is installed in an inclined manner in parallel with the top surface of the heating chamber 43. Preferably, heating units 45 capable of continuously heating the air flowing through the curved flow channel are laid on the upper and lower surfaces of the guide plate 44. Specifically, the heating unit 45 may be a sheet-like electric heating wire. Preferably, a plurality of gradient exhaust strips 46 with gradually increasing opening widths are arranged at intervals on the inclined lower surface of the heating bin 43. Specifically, the gradient exhaust strips 46 gradually increase from the inclined high side to the inclined low side, so that in the process of effective air diversion, the gradient exhaust strips 46 on the inclined low side are guaranteed to output sufficient high-temperature drying airflow, forming multiple parallel drying airflows with gradient temperature changes, so that the surface to be coated can complete the drying operation of the surface enhancer under the blowing of the gradually heated multiple airflows, thereby improving the drying effect while avoiding the defect of direct high-temperature blowing causing the material to be directly volatilized.

[0039] Preferably, the multi-component cross-linking coating assembly 5 comprises a primary mixing tube 51, a primary feeding mechanism 52, a central shunt and pressure stabilizing mechanism 53, a secondary mixing mechanism 54, an adjustable delivery pipe 55 and a staggered array nozzle 56. Preferably, a primary feeding mechanism 52 capable of uniform feeding is also sleeved on the branch pipe 512 of the primary mixing tube 51. Preferably, the primary mixing tube 51 is connected to the secondary mixing mechanism 54 through a central shunt and pressure stabilizing mechanism 53 capable of regulating the pressure of the component coating liquid flow outputted by it, so that the output ratio of different component coatings can be adjusted by the central shunt and pressure stabilizing mechanism 53, so that different component coatings can be mixed in a specific proportion. Preferably, the overpressure component coating liquid flow shunted by the central shunt and pressure stabilizing mechanism 53 can also be output through the secondary mixing mechanism 54, so as to compensate for the content deviation existing when the secondary mixing mechanism 54 drives the multi-component coating that has completed cross-linking mixing to be air-sprayed and outputted. Specifically, the overpressure component coating refers to the flow corresponding to the excessive part of the liquid flow pressure, and the pressure stability and flow stability of the liquid flow output by the main channel are limited by diversion. The component coating content deviation is the fluctuation error of the unit content caused by the presence of airflow during the airflow disturbance mixing and directional traction driving process of the multi-component coating produced by cross-linking mixing. The central diversion and voltage stabilization mechanism 53 can also use part of the component coating of the overpressure diversion to compensate for the fluctuation error of the proportion of the coating components in the unit volume caused by the presence of airflow during the subsequent cross-linking mixing and transportation process, thereby increasing the proportion of the multi-component coating in the mixed gas and liquid flow, and ensuring the coating sufficiency, completeness and thickness of the multi-component coating. Preferably, the output end of the secondary mixing mechanism 54 is connected to the staggered array nozzle 56 through an adjustable delivery pipe 55, so that the multi-component coating with controllable cross-linking mixing reaction process can be output, so that the multi-component coating that is evenly mixed and the curing film-forming time point is accurately controlled can be quickly cured and film-formed on the surface to be coated.

[0040] The auxiliary airflow introduced by the secondary mixing mechanism 54 provided in the present application uses the traction force generated by the airflow injection to adjust the conveying speed, so that the liquid flow formed by the multi-component coating is connected to the auxiliary airflow during the pressurized conveying process to increase the speed and dispersion of the liquid flow, so that the multi-component coating can be evenly mixed and dispersed during the effective atomization process, and the curing reaction can be quickly completed and the organic matter can be avoided from volatilizing, and the diffusion of pollutants can be prevented, so that the coating can be effectively solidified and condensed. In addition, the auxiliary airflow can also controllably change the conveying time of the cross-linked mixed multi-combination coating before the curing reaction occurs, and controllably make the multi-component coating complete the adhesion and curing in a short time after spraying, and can adjust the air spray speed according to the pre-mixing time of the curing reaction, so as to realize the control and limitation of different pre-interval time lengths. Finally, the auxiliary air spray can also fully discharge the multi-component coating that has completed the cross-linking and mixing after the stage spraying is completed, so as to avoid the multi-component coating from being cured and unable to be cleaned in the secondary mixing mechanism 54, the adjustable conveying pipe 55 and the staggered array nozzle 56, thereby ensuring the smoothness and recycling of the pipeline.

[0041] like Figure 2As shown, the input end of the confluence pipe 511 of the primary mixing pipe 51 is connected to the first material tank 81 provided with a hydraulic drive pump 9. Further preferably, the output end of the confluence pipe 511 is connected to at least two branch pipes 512 connected in parallel, so that the branch pipes 512 are used to divert the liquid flow transported by the confluence pipe 511. Preferably, a plurality of confluence pipes 511 and branch pipes 512 with different cross-sectional dimensions of the pipe bodies are arranged in an alternating manner to jointly construct a variable volume pipeline that is periodically divided and combined, so that the liquid flow can be divided and converged multiple times when it flows in a directional manner in the variable volume pipeline defined by the primary mixing pipe 51, and the speed of the liquid flow can be continuously changed, thereby promoting the uniform mixing of multiple components of the component coating represented by the liquid flow during the directional transportation process. The variable volume flow channel of periodic separation and combination refers to the separation and combination flow channel constructed by the alternating arrangement of the converging pipe 511 and the branch pipe 512, so that the directional flow of the liquid flow is divided when it flows from the converging pipe 511 into the branch pipe 512, and the liquid flow is converged when it flows from the branch pipe 512 into the downstream converging pipe 511, so that the liquid flow flowing along the alternately arranged converging pipe 511 and the branch pipe 512 is periodically separated and combined, and due to the different cross-sectional areas of the converging pipe 511 and the branch pipe 512, the flow rate of the liquid flow in the flow channels with different pipe diameters will also change synchronously. Further preferably, the secondary diversion is capable of further diverting and disassembling the converged liquid flow, so that the four branch liquid flows can better complete more effective mixing of the solute and the solution during the convergence process and the variable speed diversion process, thereby improving the uniformity and sufficiency of the mixing during the transportation process. Preferably, the cross section of the confluence pipe 511 is smaller than the sum of the cross sections of the parallel branch pipes 512, so that the solvent flow that completes the solute addition in the branch pipe 512 can intersect and mix in the downstream confluence pipe 511 at a faster flow rate, and the branch flow can be tilted and offset during the confluence process to accelerate the mixing of the substances, and then the distribution of the solute in the solvent is changed again during the secondary diversion, so that the solute is more evenly dispersed in the solvent to form a component coating with uniform distribution of components. Preferably, the first material tank 81 connected to the two primary mixing pipes 51 respectively stores solvents of different component coatings, so that in the process of the primary mixing pipe 51 conveying the solvent, the primary feeding mechanism 52 connected to the primary mixing pipe 51 can add a specified solute to the solvent, and then mix to generate component coatings.

[0042] like Figure 1 and Figure 2As shown, the primary feeding mechanism 52 includes a sleeve 521, a primary feeding delivery pipe 522, a cylindrical baffle 523 and a primary limit spring 524. Preferably, the sleeve 521 is sleeved on the branch pipe 512. Further preferably, the end of the sleeve 521 close to the inlet side of the branch pipe 512 is connected with the primary feeding delivery pipe 522. The output end of the primary feeding delivery pipe 522 is connected to the second material tank 82 provided with a hydraulic drive pump 9. Preferably, the annular gap between the sleeve 521 and the branch pipe 512 is filled with an axially slidable cylindrical baffle 523. Further preferably, the side of the cylindrical baffle 523 away from the primary feeding delivery pipe 522 is connected with a primary limit spring 524 capable of limiting its initial position in the annular gap. Preferably, the end of the primary limit spring 524 away from the cylindrical baffle 523 is connected to the axial inner end wall of the sleeve 521. Further preferably, a sealing ring is provided on the inner annular surface of the sleeve 521 and the outer annular surface of the branch pipe 512 to fill the gap between the cylindrical baffle 523 and the side wall of the annular gap, so that the cylindrical baffle 523 can effectively separate the annular gap space. Preferably, a feeding strip hole 5121 is provided in an annular direction on the tube body of the branch pipe 512 wrapped by the sleeve 521. Specifically, when the solute is pressurized and input into the sleeve 521 through the primary feeding delivery pipe 522, the pressurized solute liquid flow can push the cylindrical baffle 523 to move horizontally to compress the primary limit spring 524, so that the feeding strip hole 5121 blocked by the cylindrical baffle 523 is exposed, so that the solute liquid entering the annular gap defined by the sleeve 521 flows through the feeding strip hole 5121 and pours into the branch pipe 512. The actual loading amount of the solute involved in the mixing process is adjusted by the hydraulic pressure of the solute flow, so that the solute can self-regulate to complete the variable loading, ensuring the abundance of the feed and the uniformity of the mixing ratio. Specifically, when the solute flow of the present application fluctuates or the solute concentration needs to be changed, the input pressure of the solute flow is adjusted according to the batching requirements, so that the loading amount of the solute flow can change with the change of the flow pressure, thereby realizing the adaptive adjustment of the proportioning concentration, and ensuring the stability and adjustability of continuous feeding. When the hydraulic pressure of the solute flow fluctuates, the cylindrical baffle 523 moves horizontally under the hydraulic pressure, thereby changing the exposed area of ​​the feeding strip hole 5121, so that the solute flow of different flow rates can be input into the branch pipe 512 through the feeding strip hole 5121.

[0043] like Figure 1 and Figure 3As shown, the central flow-dividing and pressure-stabilizing mechanism 53 includes a valve housing 531, an inlet pipe port 532, an outlet pipe port 533, a flow-dividing pipe port 534, a strip-shaped through-port 535, a valve core 536, a valve core limiting spring 537, a limiting block 538 and an adjusting plug rod 539. Preferably, the valve housing 531 is connected to the output end of the primary mixing pipe 51 through the inlet pipe port 532, and is also connected to the input end of the secondary mixing mechanism 54 through the outlet pipe port 533. Preferably, a valve core 536 is movably inserted in the valve housing 531. Further preferably, one end of the valve core 536 away from the inlet pipe port 532 is connected to the limiting block 538 through the valve core limiting spring 537. Preferably, the limiting block 538 is limited in its working position by an adjusting plug rod 539 that passes through one end surface of the valve housing 531, thereby adjusting the pressure translation ability of the valve core 536. Specifically, the ability to translate under pressure refers to the ability of the valve core 536 to translate under the hydraulic pressure in a manner of compressing the valve core limit spring 537. Due to the translation of the limit block 538, the distance that the valve core 536 needs to translate to expose the strip through-hole 535 of the same cross-sectional size and the amount of compression of the valve core limit spring 537 will also change, so that its ability to translate under hydraulic drive will also change synchronously. Preferably, the side wall of the valve housing 531 blocked by the valve core 536 is provided with a strip through-hole 535. Preferably, the outer side of the valve housing 531 is also connected to a diversion pipe port 534 connected to the strip through-hole 535, so that the valve core 536 is translated under the hydraulic pressure, so that at least part of the inlet of the strip through-hole 535 is exposed, and then the component coating liquid flowing into the valve housing 531 is diverted through the strip through-hole 535, so as to ensure the flow stability and hydraulic stability of the component coating liquid flow output through the outlet pipe port 533.

[0044] Preferably, after the component coating liquid flows into the valve housing 531 through the inlet pipe port 532, most of the component coating liquid flows out from the outlet pipe port 533, and the valve core 536 is forced to move laterally under the hydraulic pressure of the component coating liquid flow, so that the strip-shaped through-port 535 blocked by the valve core 536 is gradually exposed, thereby realizing the diversion of the component coating liquid flow. Specifically, the valve core 536 moves laterally in linkage with the change of the hydraulic strength of the component coating liquid flow, changes the size of the inlet exposed cross section of the strip-shaped through-port 535, thereby synchronously changing and diverting component coating liquid flows of different sizes, ensuring the momentary flow stability and momentary hydraulic stability of the component coating liquid flow output through the outlet pipe port 533.

[0045] Preferably, the adjusting plug rod 539 is threadedly inserted into the end face of the valve housing 531, so that the length of the adjusting plug rod 539 inserted into the valve housing 531 can be changed by screwing the adjusting plug rod 539, thereby changing the working position of the limit block 538. Further preferably, the insertion front end of the adjusting plug rod 539 is rotatably connected to the limit block 538, so that when the adjusting plug rod 539 is rotated to change its insertion depth, the limit block 538 only undergoes axial translation under the guidance of the valve housing 531. Specifically, the cross-section of the valve housing 531, the valve core 536 and the limit block 538 can be a polygonal structure such as a square. Preferably, a sealing ring that can cooperate with the valve core 536 to separate the inner cavity of the valve body is embedded on the inner wall of the valve housing 531. Specifically, pressure control and flow stabilization means that the valve core 536 that translates with the hydraulic pressure fluctuation can self-adjustably divert liquid flows of different sizes, thereby achieving hydraulic control of the liquid flow output through the outlet pipe 533 and ensuring the stability of the liquid flow output through the outlet pipe 533.

[0046] like Figure 4 and Figure 5 As shown, both air inlet ends of the dual-inlet air drive unit 541 of the secondary mixing mechanism 54 are connected to a mixed air inlet pipe 542. Preferably, the mixed air inlet pipe 542 is adjustable to communicate with the external space and the storage sub-cavity 545 through the first inlet pipe 543 and the second inlet pipe 544, respectively. Preferably, the input end of the storage sub-cavity 545 is connected to the output end of the branch pipe 534. Preferably, the dual-inlet air drive unit 541 also directional conveys the pressurized air flow in a manner of constructing a single air inlet channel, so as to clean the multi-component paint in the confluence main shell 547 at the end of spraying. Specifically, the single air inlet channel means that the second inlet pipe 544 is closed, and only the first inlet pipe 543 is connected to the outside. Preferably, the two output ends of the dual-inlet air drive unit 541 are respectively connected to the inlet branch of the herringbone manifold 546. Further preferably, the output end of the herringbone manifold 546 is inserted into the shell cavity of the confluence main shell 547 from the axial upper end. Preferably, side port mixing inlet pipes 548 connected to different outlet pipes 533 are symmetrically arranged on both sides of the converging main shell 547. Specifically, a plurality of through holes 5471 are arranged in an array on the side wall of the converging main shell 547 that is wrapped by the side port mixing inlet pipes 548. Figure 7 As shown, the multiple through holes 5471 in the same row are arranged in a manner that their apertures increase step by step in a direction away from the input end of the side port mixing inlet pipe 548. Preferably, the sum of the hole sections of the multiple through holes 5471 is less than or equal to the cross-sectional area of ​​the side port mixing inlet pipe 548, so that the coating liquid flows of different components can be input into the converging main housing 547 in a multi-point injection manner under the condition of reduced flow cross-section and increased flow velocity, thereby accelerating the counter-mixing of the coatings of different components, and further relative movement occurs under the traction drive of the airflow mixed with some coating components, thereby being directed while improving the mixing uniformity.

[0047] like Figure 6 As shown, the adjustable delivery pipe 55 includes an outer tube body 551, an inner tube body 552, a parallel delivery pipe 553, a guide pipe 554, a connecting pipe head 555, a pressure push rod 556, a piston body 557 and a return spring 558. Preferably, a plurality of parallel delivery pipes 553 of different lengths are arranged at intervals on the side wall of the outer tube body 551, and preferably, the other ends of the parallel delivery pipes 553 are connected to the guide pipe 554. Further preferably, the parallel delivery pipes 553 are extended step by step in the direction close to the input port of the inner tube body 552, so as to form pipelines with multiple parallel paths that can be selectively connected and have different path lengths. Preferably, a connecting pipe head 555 that can be connected to the staggered array nozzle 56 is also connected to the side tube wall of the guide pipe 554 away from the inner tube body 552. Further preferably, the connecting pipe head 555 is arranged on a side close to the input end away from the inner tube body 552, so as to increase the length difference between the multiple parallel pipelines in coordination with the multiple parallel delivery pipes 553 of different lengths, so that when the hydraulic pressure changes, the delivery time range of different pipelines is increased, thereby more accurately and effectively controlling the progress of the cross-linking mixing reaction. Preferably, the end side of the inner tube body 552 of the adjustable delivery pipe 55 is connected to the axial lower end of the confluence main shell 547, and further preferably, the inner tube body 552 is movably inserted in the outer tube body 551. Preferably, a pressure push rod 556 is penetrated on the insertion front end surface of the inner tube body 552. Further preferably, one end of the pressure push rod 556 is connected to the inner end wall of the outer tube body 551, and the other end thereof is connected to a piston body 557 capable of separating the tubular cavity space of the inner tube body 552. Preferably, a return spring 558 that can assist in defining its initial working position is also sleeved on the rod body of the pressure push rod 556 in the inner tube body 552. Preferably, a side wall drain port that can be selectively connected to different parallel delivery pipes 553 is also provided on the side tube wall of the inner tube body 552. Preferably, the inner tube body 552 is fixedly mounted on the carrying trolley 1. Further preferably, the outer tube body 551 can be axially movably sleeved on the inner tube body 552. Preferably, the outer tube body 551 and the inner tube body 552 are tube bodies with matching cross-sectional dimensions and a square or other polygonal cross section.

[0048] During operation, as the hydraulic pressure in the inner tube body 552 fluctuates, the piston body 557 undergoes reciprocating translation, thereby transmitting through the pressure push rod 556, so that the outer tube body 551 undergoes synchronous translation with the piston body 557 and the pressure push rod 556, and the outer tube body 551 changes its length sleeved on the inner tube body 552, and then the side wall discharge port opened on the side wall of the inner tube body 552 can be selectively connected with multiple parallel delivery pipes 553 of different lengths arranged at intervals on the side wall of the outer tube body 551 in an adjustable manner. Specifically, when the pressure increases, the outer tube body 551 reduces its length sleeved on the inner tube body 552, so that the parallel delivery pipes 553 with a longer total path are used for liquid flow delivery, so that the multi-component coating with high pressure and high flow rate can effectively complete the pre-crosslinking mixing and catalytic reaction by using the long path pipeline delivery method, so that the multi-component coating can be rapidly solidified and condensed after being sprayed on the surface to be painted.

[0049] Preferably, the staggered array nozzle 56 includes a hollow conveying plate 561 and a spraying end 562. Preferably, a connecting pipe head 555 is plugged into the upper plate surface of the hollow conveying plate 561, so as to continuously receive the mixed gas-liquid flow formed by the multi-component coating. Preferably, a plurality of spraying ends 562 are plugged into the staggered array on the lower plate surface of the hollow conveying plate 561. Specifically, two adjacent columns of spraying ends 562 perpendicular to the movement direction of the carrying trolley 1 are parallel to each other, and the plug-in points of the two columns of spraying ends 562 are staggered with each other, so that the multiple strip-shaped spraying areas formed by the plurality of spraying ends 562 during the translation of the carrying trolley 1 can form a spraying surface in a manner of at least partial overlap, thereby achieving effective full coverage spraying of the surface to be coated.

[0050] Preferably, the second curing component 6 includes a mobile power supply and a lighting board embedded on the supporting bottom plate of the carrying trolley 1. The mobile power supply provided in the present application can continuously provide power supply for the lighting board and other working units. Preferably, the mobile power supply is also connected to an external power supply through a cable, so that the external power supply can be directly used for power supply in an environment where electricity can be connected. Preferably, a plurality of ultraviolet lamp tubes are arranged at intervals on the lighting board, so that the ultraviolet light emitted by them irradiates the area coated with the multi-component coating, so that the high-intensity radiation generated by the ultraviolet light can induce the cross-linking and mixing of the low-activity prepolymer system, accelerate the full curing and film formation of the multi-component coating, ensure the stability and adhesion strength of the cured coating film, and facilitate the subsequent coating process of the film layer in a short time, thereby improving the stability and curing effect of the multi-level film layer, avoiding the problem of damage of the intermediate film layer due to the involvement of the upper coating layer when the intermediate film layer is not effectively cured, and ensuring the construction performance of the laminated film.

[0051] Preferably, the scraping assembly 7 includes a main cross frame 71, a vertical guide rail 72, a driving platform 73, a main hydraulic rod 74, a scraper mechanism 75, a driving module 76 and a feeding valve head 77. Preferably, the main cross frame 71 is detachably mounted on the rear side of the carrying trolley 1. Preferably, the main cross frame 71 is connected to the driving platform 73 through the vertical guide rail 72, and the top of the driving platform 73 is connected with a main hydraulic rod 74 capable of changing its suspended height. Preferably, the axial upper end of the main hydraulic rod 74 is also connected to the main cross frame 71, so that the working height of the driving platform 73 can be changed by telescoping the rod body. Preferably, a driving module 76 capable of synchronously driving two scraper mechanisms 75 to rotate is installed on the driving platform 73. Specifically, the two scraper mechanisms 75 adapt to the surface contour of the surface to be coated in a manner that the surface to be coated can be elastically lifted and lowered for double scraping. Preferably, a feeding valve head 77 capable of supplying surface coating to the surface to be coated after multi-component coating is sprayed is also provided on one side of the vertical guide rail 72 away from the driving platform 73 .

[0052] Preferably, the material storage unit 8 includes a first material tank 81 for storing solvent components and a second material tank 82 for storing liquid solutes. Further preferably, the two sets of material storage units 8 are used to store materials for preparing coating components and curing agent components, respectively. Specifically, the coating components usually contain active resins, pigments, fillers, and additives.

[0053] The present invention is not limited to the above optional implementation modes. Anyone can derive other various forms of products under the enlightenment of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope of the claims of the present invention fall within the protection scope of the present invention. Those skilled in the art should understand that the specification of the present invention and its drawings are illustrative and do not constitute limitations on the claims. The scope of protection of the present invention is defined by the claims and their equivalents. Throughout the text, the features guided by "preferably" are only an optional method and should not be understood as having to be set. Therefore, the applicant reserves the right to abandon or delete the relevant preferred features at any time.

Claims

1. A multi-component coating device for engineering construction, comprising a carrying trolley (1) capable of directionally moving, characterized in that: The carrier trolley (1) is provided with a pre-cleaning component (2), a pre-coating component (3), a first curing component (4), a multi-component cross-linking coating component (5), a second curing component (6) and a scraping component (7) which can cooperate with each other to perform multi-step coating on the surface to be coated, wherein: The pre-cleaning component (2) performs pre-cleaning on the surface to be coated in a manner that it can construct a split exhaust channel and controllably output an inclined purge airflow; The primary mixing tube (51) of the multi-component cross-linking coating assembly (5) mixes and blends the component coatings in a manner of constructing a periodically split and combined variable volume pipeline, the output end of the primary mixing tube (51) is connected to a centrally placed flow-dividing and voltage-stabilizing mechanism (53) capable of controlling pressure and stabilizing flow, and a plurality of the primary mixing tubes (51) connected in parallel perform cross-linking and mixing of different component coatings through a secondary mixing mechanism (54); The output end of the converging pipe (511) of the primary mixing pipe (51) is connected to at least two branch pipes (512) connected in parallel, and the converging pipes (511) and the branch pipes (512) having different cross-sectional dimensions are arranged in an alternating manner to jointly construct a variable-capacity pipeline that is periodically separated and combined; A primary feeding mechanism (52) capable of uniformly feeding is also sleeved on the branch pipe (512) of the primary mixing pipe (51); the primary mixing pipe (51) is connected to the secondary mixing mechanism (54) through the central flow shunting and pressure stabilizing mechanism (53) capable of regulating the pressure of the component coating liquid flow outputted by the primary mixing pipe (51); and the component coating shunted by the central flow shunting and pressure stabilizing mechanism (53) can also be outputted through the secondary mixing mechanism (54), thereby compensating for the multi-component coating content deviation existing when the secondary mixing mechanism (54) drives the cross-linked and mixed multi-component coating to be air-sprayed and outputted; the output end of the secondary mixing mechanism (54) is connected to the staggered array nozzle (56) through an adjustable delivery pipe (55); The sleeve (521) of the primary feeding mechanism (52) is sleeved on the branch pipe (512), and the input end of the sleeve (521) is connected to the primary feeding conveying pipe (522), the annular gap between the sleeve (521) and the branch pipe (512) is filled with a cylindrical blocker (523) capable of axial sliding, and a primary limit spring (524) capable of limiting its initial position in the annular gap is connected to the side of the cylindrical blocker (523) away from the primary feeding conveying pipe (522); The valve housing (531) of the central flow-dividing and pressure-stabilizing mechanism (53) is connected to the output end of the primary mixing pipe (51) through an inlet pipe opening (532), and is also connected to the input end of the secondary mixing mechanism (54) through an outlet pipe opening (533). A valve core (536) is movably inserted in the valve housing (531), and one end of the valve core (536) away from the inlet pipe opening (532) is fixed by a valve core limit spring (53 7) connected to a limit block (538), the limit block (538) limiting its working position by means of an adjusting plug rod (539) penetrating the end surface of the valve housing (531), thereby adjusting the compressive translational capacity of the valve core (536), a strip-shaped through-hole (535) being provided on the side wall of the valve housing (531) blocked by the valve core (536), and the output end of the strip-shaped through-hole (535) being connected to a diversion pipe outlet (534); Both air inlet ends of the dual-inlet air drive unit (541) of the secondary mixing mechanism (54) are connected to a mixing air inlet pipe (542), and the mixing air inlet pipe (542) is adjustable to communicate with the external space and the material storage sub-chamber (545) through the first inlet pipe (543) and the second inlet pipe (544), respectively. The dual-inlet air drive unit (541) also delivers pressurized air in a directional manner in a manner of constructing a single air inlet channel, thereby cleaning the multi-component paint in the converging main shell (547) at the end of spraying. The two output ends of the dual-inlet gas drive unit (541) are respectively connected to the inlet branches of the herringbone manifold (546), and the output end of the herringbone manifold (546) is inserted into the manifold main shell (547), and the two sides of the manifold main shell (547) are symmetrically arranged with side-port mixing inlet pipes (548) respectively connected to different outlet pipe ports (533), and a plurality of through holes (5471) are arranged in an array on the side wall of the manifold main shell (547) wrapped by the side-port mixing inlet pipes (548); The pre-coating component (3), the multi-component cross-linking coating component (5) and the scraping coating component (7) construct a composite coating in a manner of completing the stacking coating of multiple layers of coating on the surface to be coated in stages, and the first curing component (4) and the second curing component (6) accelerate the short-time curing film formation of the lower layer coatings at different stages in a manner of being interspersed in the multi-stage coating process; The main cross frame (71) of the scraping assembly (7) is detachably mounted on the rear side of the carrying trolley (1); the main cross frame (71) is connected to a driving platform (73) via a vertical guide rail (72); and the top of the driving platform (73) is connected to a main hydraulic rod (74) capable of changing its suspended height; a driving module (76) capable of synchronously driving two scraper mechanisms (75) to rotate is mounted on the driving platform (73); the two scraper mechanisms (75) are adapted to the surface contour of the surface to be coated in a manner that they can be elastically lifted and lowered to perform double scraping coating on the surface to be coated; and a feeding valve head (77) is also arranged on the side of the vertical guide rail (72) away from the driving platform (73).

2. The multi-component coating device for engineering construction as claimed in claim 1, characterized in that: The end side of the inner tube body (552) of the adjustable delivery tube (55) is connected to the axial lower end of the converging main housing (547), and the inner tube body (552) is movably inserted into the outer tube body (551). A pressure push rod (556) is provided on the insertion front end surface of the inner tube body (552), wherein one end of the pressure push rod (556) is connected to a piston body (557) capable of separating the tube cavity space of the inner tube body (552), and a return spring (558) capable of assisting in defining its initial working position is also sleeved on the rod body of the pressure push rod (556) located in the inner tube body (552); A plurality of parallel delivery pipes (553) of different lengths are arranged at intervals on the side wall of the outer tube body (551), and the other ends of the plurality of parallel delivery pipes (553) are connected to the guide pipe (554), wherein the plurality of parallel delivery pipes (553) are extended step by step in a direction close to the input port of the inner tube body (552), thereby forming parallel pipelines that are selectively connected and have different path lengths.

3. The multi-component coating device for engineering construction as claimed in claim 2, characterized in that: The input end of the confluence pipe (511) of the primary mixing pipe (51) is connected to a first material tank (81) provided with a hydraulic drive pump (9).

4. The multi-component coating device for engineering construction as claimed in claim 3, characterized in that: The negative pressure generating unit (21) of the pre-cleaning component (2) is connected to a forward-inclined purge port (23) and a side-inclined purge port (24) arranged in parallel via a split air supply pipe (22), so that the forward-inclined purge port (23) and the side-inclined purge port (24) cooperate to output an inclined airflow capable of pre-cleaning the surface to be coated.

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