1. After working every day, the paint pump should be cleaned with special thinner (or toluene, xylene) in time to avoid coagulation and blockage affecting the next use. When not in use for a long time, the high-pressure paint pump should be sucked into the oil for storage after thorough cleaning.
2. The hydraulic oil should be kept clean, the hydraulic oil filter element should be cleaned on time, and the hydraulic oil should be replaced in time when it is dirty.
3. When marking to stop the transfer site, the spray gun and adjustment device should be removed and put into the car to avoid bumpy damage.
4, before construction should check the engine oil, hydraulic oil, variable pump hydraulic oil, timely supplement. Note that the variable pump must not enter the foreign body, otherwise it will cause the variable pump failure or shorten the life.
5. When stopping work, the nozzle knob should be rotated 90 degrees to be vertical to the nozzle to prevent misoperation and avoid condensation of the marking paint in the nozzle.
6. When stopping spraying, open the overflow valve and turn off the power switch to prevent the oil pump and overflow valve from running under high load in non-working conditions to avoid overheating of the hydraulic oil.
7. Marking paint and thinner are flammable, and fireworks shall be prohibited.
3. construction operation steps
Preparation before spraying:
1) Safety measures. After arriving at the construction site, we must first consider the width of the road, traffic and other factors. Make full use of safety facilities such as signs, warning lights, traffic cones, command flags, etc., and provide traffic controllers to manage pedestrians and traffic to prevent accidents. Construction personnel should wear work clothes with obvious signs and eye-catching colors. Night construction should have reflective clothing, reflective signs, to ensure the safety of construction personnel and engineering.
2. Lofting. First of all, traffic management should be done to ensure the safety of lofting operation. Then measure the position of the marking line, and mark the road surface according to the position indicated in the design drawing and the measuring tools and paint of the figure. After setting out,
It should be checked whether the control meaning contained in the marking pattern can be correctly expressed and whether drivers and pedestrians can be accurately identified. When setting out the marking, the center point of the road shall be measured first, and then the center line shall be determined at intervals of 10-20m. Set the center point every 5-15m along the radius of curvature on the curve section. When it is confirmed that the set center point connection line matches the curvature, the road centerline profile is drawn by connecting each center point. In this way, check forward in sequence, while continuously extending the center line forward, it is also necessary to continuously check with the set center line position. According to the position of the road center line, mark half the width of the marking line and draw the outline of the width of the marking line for coating operation. For the curve section with small curvature radius, the design and construction of the road alignment must be confirmed to obtain the coordination with the road alignment.
3, the road surface cleaning. The heavy condition for the combination of paint and pavement is to keep the contact surface clean, and the dust, mud and sand and moisture on the pavement are the main factors for the adhesion of paint. In particular, the slow lane and sidewalk pollution is serious, which is not only the dust on the road to be removed, but also pay attention to whether there is moisture, or whether the road is wet, if necessary, the application of gas flame heating and drying before construction.
A, first of all, the need to mark the section protection, so that the marking workers clean the road surface, the whole working section with broom, plate brush thoroughly clean up, accumulation with shovel to remove.
B, brush off the dust on the road with an iron brush, and then clean the brush.
c. Blow the cleaned road surface 1-2 times with a hair dryer to completely remove the dirt in the road surface gap.
4, lane dividing line, edge line, can be measured according to the center line, the general situation also need to mark the width of the marking line. The setting-out of crosswalks and characters shall be based on the principle of construction drawing design.
5, spraying construction (see the operation of the marking machine).
6. Finishing. Trim the markings that do not meet the requirements, remove the overflowing and hanging coating film, check the size of the markings and the shape of the scribing, and modify the markings that do not meet the specifications. Timely arrange construction machinery, tools, remove construction residues and take photos.
operation of the marking machine:
1. Inspection: Check the hydraulic oil in the fuel tank, check the engine fuel, engine oil, and the hydraulic oil in the plunger variable pump, replenish it in time, and check whether the screws of each connection part are loose and tightened. Hydraulic oil selection of 40 or 50 motor oil.
2. Debugging: Open the front benchmark and tighten the fastening screws. Adjust the spray gun and the post to make it in a straight line, and adjust the spray gun to the required height.
3. Add paint: stir the paint (road marking paint) evenly into the paint box. The viscosity of the coating should be 80-100 seconds (coated -4 cups). If the viscosity of the coating is too large, it can be diluted with a small amount of thinner, and the amount of thinner is generally not more than 4% of the coating.
4. Start: Turn the overflow valve adjusting handle counterclockwise to reduce the pressure; open the engine fuel tank switch, close the engine choke valve, and place the engine throttle in the low-to-medium speed position;
a Pull the engine start handle by hand to start the engine; open the engine choke and run the engine at low speed without load for a while.
5. Circulation: open the discharge valve of high-pressure paint pump
Engine at medium speed
Turn on the corresponding power switch, start the corresponding white or yellow paint pump, and the paint pump can suck the paint in 2-5 minutes
After the paint pump inhales the paint, it continues to circulate for 3-5 minutes, and the cycle time is appropriately extended when the temperature is low.
6. Stir and stir by hand until the mixture is uniform.
7. Boost: The engine is set at medium and high speed. Close the release valve and wait for 2-3 minutes until the pressure in the high-pressure pipeline reaches the requirements. Common pressure: the hydraulic pressure gauge shows a reading of 5-10Mpa, and the output pressure of the paint pump reaches 10-20Mpa due to the pressurization of the paint pump. Rotary relief valve can adjust the working pressure, clockwise rotation relief valve pressure increases, otherwise the pressure decreases.
Warning: Do not adjust the pressure too high, otherwise it will cause damage to the equipment.
8. Construction: the pressure in the high-pressure pipeline meets the requirements, and the spraying construction can be carried out after the machine works stably.
9. Adjustment: During construction, if the marking line has left and right deviation and width error, it should be adjusted in time. When the left and right deviation occurs, the javelin position should be adjusted. When there is a deviation in width, the height of the spray gun should be adjusted, the distance between the spray gun and the ground should be raised when it is narrowed, and the distance between the nozzle and the ground should be reduced when it is widened.
10. Cleaning: After working every day, the nozzle should be thoroughly cleaned with thin material, otherwise it will be blocked and affect the next work. When not in use for a long time, the oil should be sucked in after cleaning to avoid corrosion.
4. high pressure line and spray gun
1. High pressure pipeline
The high-pressure pipe consists of high-pressure hoses, joints and accumulators. The pressure in the high-pressure pipeline is as high as 20Mpa or above. It is strictly prohibited to disassemble and tighten screws before removing the pressure. The high-pressure hose is a synthetic resin steel wire braided hydraulic hose, which is corrosion-resistant and high-pressure resistant. The length of the high-pressure pipe is generally 1.8 meters. When writing and crosswalk lines, 10 meters long high-pressure hose can be used. The joint is specially made of alloy material. The accumulator is a high-pressure container, and its role is to ensure pressure stability, reduce pressure fluctuations, and ensure uniform marking pressure. In order to ensure that the accumulator has enough buffer space, the residual coating should be discharged after each shift is completed and the pressure is relieved.
2. Spray gun
This machine is equipped with 2 spray guns. Hydraulic spray gun switch quickly, marking neat, beautiful standard. Work by the intermittent control device control solenoid valve power switch.
After the hydraulic spray gun is used for a period of time, a small amount of grease is applied, and a small amount of lubricating oil is dripped into the movable part.
Hand-held spray gun is used for spraying words, graphics, guiding instructions, etc.
3. Nozzle
This machine is equipped with a column-type rotary nozzle. In case of nozzle blockage, the knob can be rotated 180 degrees to spray the blockage, eliminating the trouble of cleaning and dredging when other types of nozzles are blocked, and improving work efficiency.
This machine is equipped with 2 17B25 nozzles, 17 represents the flow rate of 17L per minute, and 25 represents the spraying width of 25cm when the nozzle is 30cm from the road surface.
When stopping work, the nozzle knob should be rotated 90 degrees to be vertical to the nozzle to prevent misoperation and avoid condensation of the marking paint in the nozzle.
The steps of starting the gasoline engine are as follows: turn the overflow valve adjusting handle counterclockwise to reduce the pressure;
Open the engine fuel tank switch, close the engine choke valve, and set the engine throttle to the low-to-medium speed position;
Pull the engine start handle by hand to start the engine; open the engine choke, run the engine at low speed and no load for 3 minutes, add the throttle, rotate the overflow valve pressure regulating handle to adjust the pressure, and the paint pump works.
The engine should be filled with lubricating oil and fuel as required.
5. cleaning and maintenance
1. Try not to leave too much paint in the paint barrel after working every day. It is best to clean up the remaining paint in the barrel. Bearings and rotating parts should be regularly filled with grease and lubricating oil.
2, high-pressure paint pump and pipeline, etc., should be thoroughly cleaned at the end of the work every day. When not in use for a long time, a small amount of oil can be sucked into the machine after cleaning to prevent the paint pump and pipeline from rusting.
The cleaning steps are as follows:
a Open the drain valve and drain all the paint in the accumulator.
B Open the paint barrel and put the ball valve in the paint barrel, and put all the paint in the paint barrel.
c Close the paint ball valve in the paint barrel and pour the thinner into the paint barrel
D will be inserted into the straw barrel for circulation, clean
e. Start the engine, work the paint pump, and suck in the thinner for circulating cleaning.
F close the release valve, open the spray gun, and let the thinner flush out the coating in the pipeline and spray gun.
g If the first cleaning is not clean, repeat the above steps can be thoroughly washed
I Clean the spray gun and nozzle and apply oil or immerse the nozzle in oil.
3. Replace the hydraulic oil: The hydraulic oil should be replaced every 2000 hours when the marking machine works. If the color of the hydraulic oil turns black, it should be replaced immediately.
4. Oil change: The engine uses 4-stroke gasoline oil, change the oil in the first month or 20 hours, and then change the oil every 6 months or 100 hours.
5. The engine air filter, spark plug, precipitation cup, etc. are cleaned every 6 months or 100 hours.