74results about How to "Meet spraying requirements" patented technology

The invented method utilizes a conveying appliance to throw-feed the spreact-thinned material into a charging machine, then uses a nozzle placed in the charging machine to spray the liquid material on the layer-like throw-fed material. Said invented equipment includes conveying machine, charging cabinet, material-falling cabinet, material channel, sensor and liquid material nozzle, etc.

The invention discloses a high-wall surface painting system and method for industrial buildings. A moving base is arranged to drive the whole high-wall surface painting system for the industrial buildings to achieve autonomous navigation and movement in a work space, a two-bar telescopic lifting mechanism is used for driving a mechanical arm to ascend and descend for painting of a high-rise region, the mechanical arm drives a spray gun to achieve multiple degree-of-freedom angle and position adjustment so as to meet the requirements of different painted positions; the whole painting process isautomatically completed by the high-wall surface painting system for the industrial buildings, time and labor are saved, the efficiency is high, the high-wall surface painting system for the industrial buildings can achieve painting of the top of an area up to 13 meters, and the painting requirements of high-rise areas are met. The thickness of paint is accurate and uniform, the painted surface is evenly distributed, and the quality of painting is ensured. The high-wall surface painting system for the industrial buildings can obviously reduce paint dust produced in the painting process, thusreducing the risk of human exposure to harmful paint chemicals.

The invention discloses a soybean adhesive for a water-resistant shaving board and a preparation method thereof, and relates to an adhesive and a preparation method thereof, in particular to a modified soybean adhesive for production of boiling water boiling-resistant shaving boards, which aims at solving the technical problems of difficulty in adhesive applying in the production process of the shaving board due to large viscosity and difficulty in adapting to the production of the shaving board due to long hot pressing time in the existing soybean adhesive. The method comprises the following steps of 1, synthesizing of modified polyamide polyamine resin; 2, preparing of the adhesive. The prepared soybean adhesive for the water-resistant shaving board is prepared by adding 0.3 to 1.5% of curing agent and 10 to 25 parts of soybean meal into 100 parts of modified polyamide polyamine resin and mixing at room temperature. The soybean adhesive has the advantages that the viscosity is low, the adhesive is conveniently and uniformly sprayed onto the shaving board, the curing speed is high, the water-resistant property is good, and the soybean adhesive is especially suitable for preparing the boiling water boiling-resistant shaving board in the existing shaved board production line. The soybean adhesive belongs to the field of preparation of adhesives.

The invention relates to an inner wall spraying device of a round pipeline. The inner wall spraying device is formed by sequentially connecting a guide pipe, a guide pipe end cover, a roller, a support, an atomizing nozzle (consisting of a spray head and a flow control knob), an atomizing nozzle adapter, a connector and a rotary connector according to a specific installation sequence. The inner wall spraying device is specially designed for spraying an inner wall of the round pipeline, so that the inner wall spraying device is simple in structure, reliable in work, convenient to maintain, low in cost, capable of being completely disassembled, wider in application range, uniform for spraying the paint, large in spraying circular coverage range and capable of meeting the spraying requirement of the pipeline with inner diameter of 100mm to 700mm; moreover, the roller is made of polyurethane and is soft, the inner wall of the to-be-sprayed pipeline is not scratched, and a good protection effect can be achieved.

The invention relates to a coating spraying device for the interior of a thin and long pipeline. The coating spraying device comprises a walking mechanism, a spraying mechanism and a camera device. The walking mechanism comprises a first motor, a first speed reducer, a chain transmission mechanism, a runner and two supporting plates provided with spring control supporting wheels. Multiple connecting rods are arranged between the two supporting plates, and the spring control supporting wheels are installed on the supporting plates through spring control supporting wheel rods. A chain in the chain transmission mechanism is wound around the runner, and the chain is connected with the supporting plates through a buckle structure. The spraying mechanism comprises a coating transmission shaft, arotating nozzle, a material conveying pipe and a material disc. The coating transmission shaft is in transmission connection with an output shaft of a second speed reducer. The coating transmission shaft is of a hollow structure, and a small hole is formed in the shaft wall of the coating transmission shaft. The material disc is installed at the head portion of the coating transmission shaft, andthe rotating nozzle is installed on the material disc. The camera device comprises a camera and an illumination lamp. Compared with the prior art, the coating spraying device can be suitable for thinand long pipelines with the pipeline inner diameter being 100 mm to 600 mm, and the spraying conditions in the pipelines can be observed conveniently.

The invention relates to the field of spraying equipment, in particular to an automatic angle adjusting system for spray guns. The automatic angle adjusting system for the spray guns comprises a first linear guide rail, a controller and at least one spray gun unit. Each spray gun unit comprises the corresponding spray gun, a rotation adjusting mechanism, a first connecting base and a first marking mechanism, wherein the spray gun is installed on the rotation adjusting mechanism connected with the controller, and the rotation adjusting mechanism can be controlled by the controller to automatically adjust the jetting angle of the spray gun; the rotation adjusting mechanism is installed on the first linear guide rail through the first connecting base, the first connecting base can move along the first linear guide rail, the rotation adjusting mechanism can rotate and conduct vertical adjustment on the first connecting base, and the first marking mechanism is used for marking the rotation angle and the vertical adjustment position of the rotation adjusting mechanism on the first connecting base. According to the automatic angle adjusting system for the spray guns, the scheme of automatic spray gun angle adjustment and manual spray gun position adjustment is adopted, free adjustment of the spray gun position and angle is achieved, and the production cost and the control difficulty are reduced.

The invention discloses an automatic spraying device for tubular metal heat exchanger outer walls. The automatic spraying device mainly comprises a spraying tank and a spraying head. The spraying head is of a tubular structure movably nested on a heat exchange steel pipe. One end of the spraying head is of an annular structure, and the other end of the spraying head is connected with a vertical rod. The vertical rod is parallel to the heat exchange steel pipe. The spraying head is communicated with the spraying tank through a material pipe. A plurality of spraying nozzles are evenly distributed on the inner wall of the annular structure in the circumferential direction. The spraying nozzles are right opposite to the outer wall of the heat exchange steel pipe. The spraying head can move along the vertical rod so as to drive the annular structure to axially displace along the heat exchange steel pipe. Coatings are sprayed to the outer wall of the heat exchange pipe uniformly, the spraying efficiency is high, and the automatic spraying device can be used for construction of coating of the outer walls of tubular metal heat exchangers arrayed in rows.

The invention aims at provides a preparation method of an NiCrAlYSi powder spraying material. The method adopts a technology of 'mother alloy pre-preparation and ultrasonic gas atomization' and a purpose of uniform control for chemical components of powder is achieved. The method comprises the specific steps that (1), a mother alloy is pre-prepared by a vacuum induction heating method; raw materials are placed into a magnesia crucible, with forvacuum degree higher than 2Pa, refining temperature of 1390-1430 DEG C, refining period of 15-20min, and casting temperature of 1420-1460 DEG C; the raw materials are cooled and cast to an alloy bar with a diameter of 70-100mm; (2) component analysis is conducted on the obtained mother alloy; if components of the obtained alloy exceed a proportion of the chemical components of the NiCrAlYSi powder, secondary stock preparation is conducted according to the proportion; (3), gas atomization pulverization is conducted, with atomization temperature of 1500-1530 DEG C, atomization pressure of 8-10MPa, gas flow of 10-15m<3> / min, alloy liquid flow of 2-4kg / min, and an atomization medium of pure argon.

The invention relates to the field of ceramic coating and surface engineering, in particular to a method for preparing a Ti2AlC phase ceramic coating through cold spraying in-situ formation. The preparation method can be applied to an MAX phase material system capable of being synthesized through pressureless sintering and is specifically explained through the preparation method for the Ti2AlC phase ceramic coating. The preparation method comprises the steps that firstly, raw material powder for sintering and preparing the coating is mixed according to the required proportion; secondly, an organic solvent and an adhesive are added into the mixed powder to form slurry through wet ball grinding; thirdly, the slurry is dried into spherical raw material powder through a spray drying granulation method; fourthly, the spherical raw material powder is deposited on a base material where the coating needs to be prepared through a cold gas dynamic spraying device; and fifthly, the deposited base material and the coating are sintered under a vacuum atmosphere, and an in-situ formation MAX phase ceramic coating can be obtained. The method for preparing the MAX phase ceramic coating through cold spraying in-situ formation has the characteristics that the prepared coating is large in thickness and good in quality, the powder deposition speed is high, no MAX phase decomposition reaction occurs in the process, using is convenient, and the method is suitable for large scale application.

The invention relates to the technical field of spraying processes, in particular to a low-friction spraying process for an escalator skirt board, which adopts the whole process flow that: after being degreased, derusted, acid-washed, phosphated, washed, dried and the like, a workpiece satisfies the spraying requirements; and then the workpiece is sprayed with low-friction powder and is solidified after spraying, so that a coating layer with low friction coefficient is formed on the surface of the workpiece. Therefore, the escalator skirt board satisfies the corresponding requirements in the EN115-2008 standards.

The invention discloses an industrial heat-resistant silane modified polyether sealant in the technical field of adhesives. The industrial heat-resistant silane modified polyether sealant is prepared from the following raw materials in parts by weight: 80-100 parts of silane modified polyether, 50-80 parts of a plasticizer, 160-200 parts of a filler, 0.1-10 parts of a thixotropic agent, 1-2 parts of an ultraviolet light absorber, 1-2 parts of a light stabilizer, 4-7 parts of a water remover, 3-6 parts of a coupling agent and 1-2 parts of a catalyst. According to the silane modified polyether sealant, a polysiloxane chain segment is introduced, so that the heat resistance of the sealant can be effectively improved, the finishing property is not influenced, and the silane modified polyether sealant prepared by adopting the formula and the method can be widely applied to the industrial fields of rail transit, automobile manufacturing, containers and the like.

The invention discloses an annular atomizing oil-spraying device of lubricating grease. The device comprises a bilayer oil gas delivery pipe. The device is characterized in that the bilayer oil gas delivery pipe comprises an outer-layer pipe and an inner-layer pipe coaxially positioned inside the outer-layer pipe, spiral diversion grooves are circumferentially distributed in an air diversion plate, and an atomizing oil-spraying nozzle is communicated with a mixing chamber. By arranging the air diversion plate with inclined diversion grooves, compressed air is ejected in a centrifugal tangential direction, and high-pressure compressed air ejects lubricating grease discharged from an oil outgoing hole, so that the defect that ejecting of the lubricating grease is unsmooth is made up; by arranging the atomizing oil-spraying nozzle between a retaining plate and the outer-layer pipe, the lubricating grease after being atomized is ejected annularly to the surrounding, so that waste of the lubricating oil is reduced effectively, the lubricating grease is saved by more than 70%, and requirements on spraying the inner walls of tubular parts are met.

The embodiment of the invention relate to the technical field of pesticide spraying equipment, and discloses an electric rail spraying machine. The electric rail spraying machine comprises a sprayingdevice, a liquid supplying device, a main control system, a trolley and a driving device. The liquid supplying device is communicated with the spraying device and used for supplying a pesticide solution to the spraying device; the main control system is electrically connected with the liquid supplying device and used for controlling the liquid supplying device; the trolley bears the spraying device, the liquid supplying device and the main control system and is used for moving along a track; the driving device is electrically connected with the main control system and used for driving the trolley to move in the length direction of the track. Therefore, the working efficiency of spraying the pesticide solution can be greatly improved, and workers do not need to follow the electric rail spraying machine in the spraying process of the pesticide solution so that the contact between the workers and sprayed pesticide solution mist drops can be reduced, and the physical health of the workersis ensured. In addition, the spraying device is arranged on the trolley so that the spraying device can be placed at a higher altitude to facilitate spraying on tall crops.

The detergent is composed of main agent component and adjuvant component. The main agent includes components and dosages: film forming material 75-90 and plasticising agent 3-5; and the adjuvant component includes components and dosages: thickening agent 2-5, stuffing 2-10 and flash dry agent10. The invention possesses pressing and decontaminating dual functions. Contamination is radioactive aerosol in air and radioactive deposits in not fixity on ground. Consecutive membranes are formed after washing, wetting, diffusing, adsorbing and sticking etc. procedures on the aerosol and deposits. Using machine retrieves membranes so as to reach purpose for cleaning out membranes. The detergent forms continuous membranes with index of mechanical properties being met to requirement of mechanical retrieve. The detergent is suitable for cleaning out radioactive contamination on each complicated ground including surface of concrete, road surface of cement and bitumen, farmland etc. in field.

The present invention discloses a plasma spraying machine based on centrifugal atomization principle and thermal spraying process by utilizing said spraying machine. Said plasma spraying machine is formed from centrifugal atomization mechanism, plasma cutting torch, feeding mechanism, control system, cooling system, machine frame and protective device. Said invention can be used for thermal-spraying surface of internal hole whose minimum hole diameter is 70mm.

The invention discloses automatic spraying equipment for marking lines of yaw brake pads. Marking line spraying of different yaw brake pads is realized, regulation and control are achieved in a wholespraying mechanism, and X, Y and Z tri-axial motion is controlled in the spraying mechanism. An X-axis motion module mainly determines the position of a yaw brake pad guide plate, and a Y-axis motionmodule mainly determines the position of a spray head system; and a pair of racks are adopted in the X-axis direction in a transmission mechanism, and the Y-axis synchronous belt transmission is adopted in the Y direction; lead screw transmission is used in the Z-axis direction; and the control range among the X, Y and Z axes is controlled, by controlling the X, Y and Z three axes, the spray headsystem and a yaw brake pad guide rail can be adjusted according to the size and thickness of the actual yaw brake pads, and after the yaw brake pads are positioned on a transmission belt, different types of yaw brake pads used on the current market can be sprayed to form the marking lines.

The invention discloses an agricultural greenhouse pesticide spraying control system and a pesticide spraying method thereof, and belongs to the technical field of plant protection unmanned aerial vehicles. The system is characterized by at least comprising a pesticide spraying device which comprises an unmanned aerial vehicle, a control unit is arranged in the unmanned aerial vehicle, and an automatic spraying controller is arranged at the top of the unmanned aerial vehicle. A spraying box is arranged at the bottom of the unmanned aerial vehicle, a spraying instrument and a remote control end are arranged at the bottom of the spraying box, the spraying instrument and the remote control end are connected to the control unit through a wireless transmitter and a receiver, and an imaging module is arranged on the remote control end and used for remotely observing and controlling operation of the unmanned aerial vehicle and pesticide spraying. An image capture module, an image comparison module and a point capture module are further mounted in the remote control end. According to the system, the surface of a detection part of the unmanned aerial vehicle is not prone to adhesion of water mist, and the position of the unmanned aerial vehicle does not need to be adjusted when the detection position is adjusted.

The invention discloses a series-parallel robot for linkage spraying of a large surface structure. The series-parallel robot comprises an air three-degree-of-freedom moving mechanism and a spraying mechanical arm, the air three-degree-of-freedom moving mechanism comprises an X-direction moving mechanism, a Y-direction moving mechanism and a Z-direction moving mechanism, the two ends of an X-direction moving truss of the X-direction moving mechanism move on X-direction guiding sliding rails in a guiding mode, the X-direction guiding sliding rails are fixedly connected with a workshop steel structure, the Y-direction moving mechanism is installed on the X-direction moving truss in a guiding mode through a guiding assembly at the upper end of a Y-direction moving frame, a Z-direction moving mechanical arm platform of the Z-direction moving mechanism is installed on the Y-direction moving frame in a guiding mode, a base of the spraying mechanical arm is installed on the Z-direction moving mechanical arm platform of the air three-degree-of-freedom moving mechanism, and the air three-degree-of-freedom moving mechanism drives the spraying mechanical arm to achieve translational motion in three directions in the space. The paint spraying device has the advantages of high paint spraying efficiency, uniformity in paint spraying, large movement space, accuracy in positioning, stable gravity center, small shaking, capability of effectively avoiding long-term injury of paint to human bodies and the like.

The invention discloses a vehicle-mounted lifting insecticide sprayer which comprises a traction frame and an insecticide box and further comprises a hydraulic insecticide spraying system, wherein thehydraulic insecticide spraying system comprises a pump station, a liquid dispensing branch pipe and a connection pipeline; when an electromagnetic switch valve is turned off and overflowing insecticide liquid flows back to the insecticide box, an overflow valve can stir the insecticide liquid in the insecticide box; a branch pipe frame is movably arranged on a restraining gantry in a lifting modeand is driven by a hydraulic oil cylinder to adjust the height; the branch pipe frame comprises a fixed arm, supporting middle arms and a supporting small arm; the supporting middle arms and the supporting small arm are sequentially connected to the two ends of the fixed arm, the supporting small arm and the supporting middle arms are in foldable match, and when the two supporting middle arms arefolded, the supporting middle arms can be folded inwards in a triangular shape relative to the fixed arm. According to the vehicle-mounted type insecticide sprayer disclosed by the invention, a foldable arm frame can buffer ground unevenness, and mist spraying combination modes are multiple; the vehicle-mounted type insecticide sprayer has a real-time insecticide liquid stirring function and canmeet insecticide spraying requirements of different widths and different heights of crops.

The invention discloses a medicine spraying apparatus, which comprises a bottle body, wherein a bottle cover is arranged on the bottle body; a medicine chamber is arranged in the bottle cover; a piston is arranged in the medicine chamber; one end of the medicine chamber is connected to a spraying pipe and the other end is connected to an inflating device; the side, close to the inflating device, of the piston is provided with a plug rod; a passing pipe is correspondingly arranged in the medicine chamber; a spraying head is arranged on the spraying pipe; the spraying pipe comprises a hard outer pipe and a soft inner pipe; a gap between the outer pipe and the inner pipe communicates with the passing pipe; a liquid outlet pipe is connected to the medicine chamber; a check valve is arranged on the liquid outlet pipe; the check valve is arranged at the end, close to the medicine chamber, of the liquid outlet pipe; the inflating device and the bottle body communicate; a second air valve is arranged between the inflating device and the bottle body; a first air valve is arranged between the inflating device and the medicine chamber; and first scales are arranged on the medicine chamber. With the adoption of the technical scheme, medicine dose control is facilitated by setting the medicine chamber, and the medicine spraying apparatus can satisfy a requirement of medicine spraying, guarantee an accurate action position, save medicines and relieve patients' burdens.

The invention discloses a high-efficiency all-around fruit tree spraying vehicle. The high-efficiency all-around fruit tree spraying vehicle comprises a bearing base, a cockpit ladder, a cockpit, a cockpit door, a cockpit observation window, a driving operation table, a spraying water supply device, a multi-layer spraying device, a spraying vehicle crawler belt, moving wheels, a motor base and a power motor, wherein the bearing base is of a multilateral structure; the cockpit ladder is fixedly connected to the upper left corner of the bearing base; the cockpit is fixedly connected to the top of the cockpit ladder; the cockpit door is formed in the right side of the front surface of the cockpit; and the cockpit observation window is formed in the upper half part of the cockpit. The high-efficiency all-around fruit tree spraying vehicle is simple in structure and reasonable in design, a traditional manual spraying mode is replaced with machinery, the multi-layer spraying device at the front end of a vehicle body can comprehensively and thoroughly spray fruit trees, meanwhile, the crawler belt type design facilitates movement of the vehicle body, the design of an extension arm and anextended spraying device can meet the spraying requirements of the fruit trees with different heights, and liquid needing to be sprayed can be blended through a mixed water supply device.

The invention relates to a stepped connection multi-combination greenhouse crop intelligent spray device. Crops in a greenhouse can be sprayed by devices such as a spray connecting device, a spray seat lower boss, a spray bent pipe, an elastic pressure relief device and a rotary sprayer. Besides, the spray device can automatically rotate under the action of spray force of high-pressure water by the aid of the elastic pressure relief device and angle setting of the bent pipe of the spray device. In addition, a plurality of spray devices can be connected to spray the crops with different heightsand in different distances according to practical requirements, the spray requirements of the greenhouse crops in different areas and ranges can be met to a greater extent, and the spray device has important practical significance for organic regulation in the planting and growing process of the crops in the greenhouse.

The invention discloses a seven-freedom-degree spray coating robot. The seven-freedom-degree spray coating robot comprises a spray gun and a spray coating robot body. The spray coating robot body comprises a first joint, a first connector, a second connector, a third connector, a fourth connector, a fifth connector, a sixth connector and a seventh connector which are sequentially connected in series. Connection between all the connectors achieves rotation of the robot and spinning around the center axis of the robot body, so that spray coating operation is completed. The seven-freedom-degree spray coating robot can replace manual spray coating operation, lowers the labor cost, improves the spray coating efficiency, coating quality and coating precision and prevents paint mist from hurtingthe body of the operation personnel. The seven-freedom-degree spray coating robot can be freely assembled into a multi-freedom-degree long arm structure, the work range is wider than a universal typespray coating robot, and the seven-freedom-degree spray coating robot has redundancy freedom degree, high flexibility and good dynamic response and can meet spray coating requirements of large-sized complicated-profile workpieces such as an airplane and a ship.

The invention provides a pesticide spraying device suitable for greenhouse chrysanthemums. The pesticide spraying device comprises a frame, and guide units, a traveling unit, a control unit and a pesticide spraying unit which are arranged on the frame. According to the pesticide spraying device provided by the invention, the guide units can detect the deviation direction of the device in the traveling process, and deviation data is transmitted to the control unit; the control unit controls the traveling direction of the traveling unit according to the deviation data, so that the pesticide spraying device has an automatic row-follow function; the pesticide spraying unit includes push rods, vertical spraying rods and transverse spraying rods, and thus, the pesticide spraying requirements ofthe top parts and the side faces of the chrysanthemums can be met at the same time; and moreover, the vertical spraying rods can be detached at the initial production stage of the chrysanthemums, so that the phenomenon that the vertical spraying rods are in contact with the ground due to the fact that the pesticide spraying device is two low cannot occur; therefore, the pesticide spraying device provided by the invention has the automatic row-follow function and can be used for uniformly spraying pesticide to greenhouse chrysanthemums.

The invention discloses a soybean adhesive for a water-resistant shaving board and a preparation method thereof, and relates to an adhesive and a preparation method thereof, in particular to a modified soybean adhesive for production of boiling water boiling-resistant shaving boards, which aims at solving the technical problems of difficulty in adhesive applying in the production process of the shaving board due to large viscosity and difficulty in adapting to the production of the shaving board due to long hot pressing time in the existing soybean adhesive. The method comprises the following steps of 1, synthesizing of modified polyamide polyamine resin; 2, preparing of the adhesive. The prepared soybean adhesive for the water-resistant shaving board is prepared by adding 0.3 to 1.5% of curing agent and 10 to 25 parts of soybean meal into 100 parts of modified polyamide polyamine resin and mixing at room temperature. The soybean adhesive has the advantages that the viscosity is low, the adhesive is conveniently and uniformly sprayed onto the shaving board, the curing speed is high, the water-resistant property is good, and the soybean adhesive is especially suitable for preparing the boiling water boiling-resistant shaving board in the existing shaved board production line. The soybean adhesive belongs to the field of preparation of adhesives.

The invention relates to the technical field of household paper production equipment, and discloses a spraying device for production of paper for daily use. The device comprises a total gas inlet pipeused for providing atomized air flow, a total medicine inlet pipe used for conveying a medicine, an atomizing nozzle used for atomizing the medicine and forming liquid droplets, and an installation bracket, wherein the total gas inlet pipe and the total medicine inlet pipe are fixed on the installation bracket, an adjusting mounting seat capable of horizontally sliding is arranged on the installation bracket, and the atomizing nozzle is mounted on the adjusting mounting seat. According to the invention, the atomizing nozzle is used for spraying a medicine to raw paper conveyed between a wrinkling scraper and a coiling part in a spraying manner of blowing the medicine into small fog drops, so that the function of improving the flexibility and smoothness of paper products is achieved, operation is easy, spraying is uniform, the spraying effect is good, and the beneficial effect that the spraying thickness and the spraying amount of the medicine on the unit area of paper towels can be adjusted by adjusting the distance between the atomizing nozzles so as to meet different requirements.

The invention discloses angle-adjustable automatic paint spraying equipment. The angle-adjustable automatic paint spraying equipment comprises a fixed support assembly, an automatic spray gun rotatingmechanism assembly and a rotating sensor support assembly, wherein the automatic spray gun rotating mechanism comprises a rotating frame body, the rotating frame body is connected to the fixed support assembly, and the rotating frame body can rotate clockwise or anticlockwise with the transverse central axis of the fixed support assembly as a rotating shaft; the automatic spray gun rotating mechanism also comprises a plurality of spray guns; the spray guns are connected to the rotating frame body and can rotate clockwise or anticlockwise with the longitudinal axis of the rotating frame body as a rotating shaft, wherein the plane where the fixed support assembly is located is parallel to a wall surface to be sprayed, and the rotating sensor support assembly is fixed onto the fixed supportassembly. The angle-adjustable automatic paint spraying equipment is reasonable in design, and the spray guns can be perpendicular to the wall surface for spraying according to actual spraying requirements; or the spray guns and the wall surface form 45-degree angles upwards or downwards for spraying; or the spray guns and the wall surface form 45-degree angles leftwards or rightwards for spraying, and the spraying requirement is met.