Marking device for road construction

Abstract

The invention relates to the field of road construction equipment, in particular to a road construction marking device which has the advantages of energy conservation, environmental protection, high marking efficiency and good marking effect and comprises a frame, a support, a push handle, driving wheels, universal wheels, a driving mechanism, a control system, a diesel generator, a storage battery, a storage tank, a heating mechanism, a stirring mechanism, a conveying pump and a marking mechanism. The driving wheel and the universal wheel are arranged on the two longitudinal sides of the lower portion of the frame respectively, the driving mechanism is connected with the driving wheel, the support is arranged on the upper portion of the frame, the push handle is arranged on the longitudinal side, close to the driving wheel, of the frame, the control system, the diesel generator and the storage battery are arranged on the frame respectively, and the storage tank, the conveying pump and the scribing mechanism are arranged on the support respectively. The storage tank comprises a tank body and a tank cover covering the tank body, the tank body is provided with a feeding port and a discharging port, the heating mechanism is arranged on the side wall of the tank body, the stirring mechanism is arranged in the tank body, and the conveying pump is connected with the discharging port of the tank body and the scribing mechanism.

Description

Technical Field

[0001] The present invention relates to the field of road construction equipment, and particularly to a line marking device for road construction. Background Art

[0002] Road markings are important safety signs in traffic engineering, and their construction quality directly affects road use efficiency and driving safety. Traditional road line marking devices mostly adopt a hand-pushed or vehicle-mounted structure, and have the following problems: 1) The storage tank lacks a constant temperature stirring function, and the paint is easy to solidify and agglomerate in a low-temperature environment, resulting in uneven spraying and poor adhesion of the markings; 2) The mechanical spraying mechanism has poor adaptability to road surface undulations, and vibrations are likely to cause intermittent or uneven thickness of the markings; 3) Most existing devices adopt a single nozzle fixed structure, and it is difficult to quickly switch the types of markings (such as broken lines, solid lines, arrows, etc.), resulting in low construction efficiency; 4) The steering and height adjustment of traditional devices rely on manual intervention, and it is difficult to maintain the coherence of the markings in curves or complex terrains. Summary of the Invention

[0003] Therefore, in view of the above problems, the present invention provides a line marking device for road construction that is energy-saving, environmentally friendly, and has high line marking efficiency and good line marking effect.

[0004] To achieve the above object, the present invention adopts the following technical solutions: A line marking device for road construction, comprising a vehicle frame, a support, a push handle, drive wheels, universal wheels, a drive mechanism, a control system, a diesel generator, a storage battery, a storage tank, a heating mechanism, a stirring mechanism, a delivery pump, and a line marking mechanism. It is defined that the direction extending along the length of the vehicle frame is the longitudinal direction, and the direction extending along the width of the vehicle frame is the transverse direction. The drive wheels and the universal wheels are respectively arranged on the longitudinal two sides of the lower part of the vehicle frame. The drive mechanism is connected to the drive wheels and is used to drive the vehicle frame to move. The support is arranged on the upper part of the vehicle frame. The push handle is arranged on the longitudinal side of the vehicle frame close to the drive wheels and is connected to the support. The control system, the diesel generator, and the storage battery are respectively arranged on the vehicle frame. The storage tank, the delivery pump, and the line marking mechanism are respectively arranged on the support. The storage tank includes a tank body and a tank cover covering the tank body. The tank body is provided with a feed port and a discharge port. The heating mechanism is arranged on the side wall of the tank body. The stirring mechanism is arranged inside the tank body. The delivery pump is connected to the discharge port of the tank body and the line marking mechanism; The scribing mechanism includes a rotating shaft, a torsion spring, a support frame, two swing frames, two folding assemblies, three shock-absorbing assemblies, three hoses, three solenoid valves, three paint rollers, and three nozzles. The central axis of the rotating shaft is longitudinally arranged at the longitudinal end of the bracket away from the push handle. The support frame is rotatably arranged at the outer end of the rotating shaft. The torsion spring is sleeved on the rotating shaft and its two ends are respectively connected to the support frame and the bracket. The two swing frames are respectively connected to the transverse ends of the support frame through the folding assemblies to realize the swinging of the swing frames. The three paint rollers are respectively connected to the support frame and the two swing frames through the three shock-absorbing assemblies. Each nozzle is arranged on the periphery of each paint roller for spraying paint on the paint roller. The three hoses are respectively connected to the output end of the delivery pump and the nozzles. Each solenoid valve is arranged on the hose; The driving mechanism, diesel generator, battery, heating mechanism, stirring mechanism, delivery pump, and scribing mechanism are respectively electrically connected to the control system.

[0005] Furthermore, the control system includes a controller, a first flow sensor for respectively detecting the flow rates of the solenoid valves, a speed sensor for detecting the traveling speed of the vehicle frame, and a pressure sensor for respectively detecting the pressures of the paint rollers. The first flow sensor, speed sensor, and pressure sensor are respectively electrically connected to the input end of the controller. The solenoid valve is electrically connected to the output end of the controller.

[0006] Furthermore, the flow rate of each solenoid valve , where is the flow rate of each solenoid valve detected by each first flow sensor respectively, is the pressure of the paint roller detected by the pressure sensor, is the traveling speed of the vehicle frame detected by the speed sensor, is a coefficient, and , where is the flow coefficient of the paint, is the orifice area of the nozzle, is the density of the paint, is the thickness of the coating, is the width of the coating.

[0007] Furthermore, the control system further includes a second flow sensor for detecting the flow rate of the delivery pump. The second flow sensor is electrically connected to the input end of the controller. The flow rate of the delivery pump .

[0008] Furthermore, the shock absorption assembly includes a spring damper and a rubber buffer pad. The two ends of the spring damper are respectively connected to the mounting seat and the coating roller through spherical hinges. The mounting seat is fixedly arranged on the support frame or the swing frame. The rubber buffer pad is coated around the spring damper. The pressure sensor is arranged at the bottom of the mounting seat.

[0009] Furthermore, the tank body of the storage tank adopts a double-layer stainless steel structure, and a ceramic fiber thermal insulation layer is filled in the interlayer. A temperature sensor is arranged at the bottom of the tank body. The tank cover is hermetically connected to the tank body through a quick-release flange. A pressure relief valve and a visible liquid level window are arranged at the upper part of the tank body.

[0010] Furthermore, the heating mechanism includes a plurality of PTC heating tapes evenly distributed along the circumferential direction of the tank body. Aluminum heat dissipation fins are covered outside each PTC heating tape. The outer wall of the tank body is coated with a silica-aluminum heat insulation layer. The PTC heating tapes are electrically connected to a temperature controller arranged at the bottom of the tank body.

[0011] Furthermore, the stirring mechanism includes a stirring shaft vertically extending into the tank body, stirring blades arranged at the lower part of the stirring shaft and scraping blades arranged at the upper part. The top of the stirring shaft is connected to a reduction motor through a coupling. A torque sensor is arranged on the output shaft of the reduction motor.

[0012] Furthermore, the folding assembly includes an L-shaped hinge seat, a rotating arm with a limiting groove, and a hydraulic locking device. The rotating arm is rotatably connected to the hinge seat through a pin shaft. The hydraulic locking device includes a hydraulic cylinder and a bolt arranged in the rotating arm. The bolt can be inserted into the positioning hole of the swing frame to realize angle locking.

[0013] Furthermore, the control system further includes a wireless communication module and a touch control screen. The wireless communication module supports 4G / 5G remote monitoring. The touch control screen is provided with a working mode selection module, a parameter setting module, and a real-time monitoring interface.

[0014] By adopting the foregoing technical solutions, the beneficial effects of the present invention are as follows: For this road construction marking device, through the hybrid power supply system composed of a diesel generator and a storage battery, diesel power is preferentially used during continuous operation, and the power supply is switched to the storage battery during standby. The energy consumption is reduced by 42% compared with pure fuel models, which is energy-saving and environmentally friendly. At the same time, the combination of driving wheels and universal wheels enables the device to turn flexibly and move stably on complex roads. The heating mechanism on the side wall of the tank body cooperates with the built-in stirring mechanism to maintain the best fluidity of the paint, preventing low-temperature solidification or high-temperature volatilization. The closed-loop temperature control system adjusts the heating power in real time through sensors to ensure the stable performance of the paint. And the three groups of independent shock-absorbing paint rollers cooperate with the folding swing frame structure, which can automatically fit the road surface undulation with a tilt tolerance of ±15°, eliminating the influence of mechanical vibration on the marking thickness, and the marking effect is good. The rotating shaft drives the support frame to achieve 180° steering adjustment. Combined with three nozzles controlled by solenoid valves, it supports the rapid switching of single lines, double lines and special markings. Each hose is equipped with an independent solenoid valve, and the paint flow of different markings is precisely adjusted through the control system, reducing material waste. The integrated design of the push handle and the universal wheel improves the control flexibility. One person can complete steering, starting and stopping, and parameter adjustment. The driving wheels and the universal wheels are placed at both ends of the frame to ensure the smooth movement of the device. The maximum climbing angle reaches 20°. The control system centrally manages the driving, temperature control, stirring and spraying modules, and realizes the automatic construction of the marking width, length and spacing through the preset program, reducing manual errors, with high marking efficiency and good marking effect. Description of the Drawings

[0015] Figure 1 is the front view structural schematic diagram of the embodiment of the present invention; Figure 2 is the sectional view structural schematic diagram of the storage tank in the embodiment of the present invention; Figure 3 is the right view structural schematic diagram of the support frame, swing frame and folding assembly in the embodiment of the present invention; Figure 4 is the circuit module diagram of the embodiment of the present invention.

[0016] Description of the Reference Numerals: 1. Frame; 2. Bracket; 3. Push handle; 4. Driving wheel; 5. Universal wheel; 6. Driving mechanism; 7. Control system; 8. Diesel generator; 9. Storage battery; 10. Storage tank; 11. Heating mechanism; 12. Stirring mechanism; 13. Delivery pump; 14. Marking mechanism; 71. Controller; 72. First flow sensor; 73. Speed sensor; 74. Pressure sensor; 75. Second flow sensor; 76. Temperature sensor; 77. Torque sensor; 78. Temperature controller; 79. Wireless communication module; 80. Touch control screen; 101, Tank body; 102, Tank cover; 103, Feed inlet; 104, Discharge outlet; 105, Ceramic fiber insulation layer; 106, Quick-release flange; 107, Pressure relief valve; 108, Visual liquid level window; 141, Rotating shaft; 142, Torsion spring; 143, Support frame; 144, Swing frame; 145, Folding assembly; 146, Shock-absorbing assembly; 147, Hose; 148, Solenoid valve; 149, Coating roller; 150, Spray head; 111, PTC heating tape; 112, Aluminum heat dissipation fins; 113, Aluminum silicate heat insulation layer; 121, Stirring shaft; 122, Stirring blades; 123, Wall scraping blades; 124, Reducing motor; 201, Hinge seat; 202, Limit groove; 203, Rotary arm; 204, Hydraulic cylinder; 205, Pin; 206, Positioning hole; 301, Spring damper; 302, Mounting seat. Detailed implementation mode

[0017] The present invention will be further described in conjunction with the accompanying drawings and specific implementation modes.

[0018] An embodiment of the present invention is as follows: Refer to Figures 1 to 4 As shown, a road marking device for road construction includes a vehicle frame 1, a bracket 2, a push handle 3, driving wheels 4, universal wheels 5, a driving mechanism 6, a control system 7, a diesel generator 8, a storage battery 9, a storage tank 10, a heating mechanism 11, a stirring mechanism 12, a delivery pump 13, and a marking mechanism 14. It is defined that the direction extending along the length of the vehicle frame 1 is the longitudinal direction, and the direction extending along the width of the vehicle frame 1 is the transverse direction. The driving wheels 4 and universal wheels 5 are respectively arranged on the longitudinal two sides of the lower part of the vehicle frame 1. The driving mechanism 6 is connected to the driving wheels 4 and is used to drive the vehicle frame 1 to move. The bracket 2 is arranged on the upper part of the vehicle frame 1. The push handle 3 is arranged on the longitudinal side of the vehicle frame 1 close to the driving wheels 4 and is connected to the bracket 2. The control system 7, the diesel generator 8, and the storage battery 9 are respectively arranged on the vehicle frame 1. The storage tank 10, the delivery pump 13, and the marking mechanism 14 are respectively arranged on the bracket 2. The storage tank 10 includes a tank body 101 and a tank cover 102 covering the tank body 101. The tank body 101 is provided with a feed inlet 103 and a discharge outlet 104. The heating mechanism 11 is arranged on the side wall of the tank body 101. The stirring mechanism 12 is arranged in the tank body 101. The delivery pump 13 is connected to the discharge outlet 104 of the tank body 101 and the marking mechanism 14; The scribing mechanism 14 includes a rotating shaft 141, a torsion spring 142, a support frame 143, two swing frames 144, two folding assemblies 145, three shock-absorbing assemblies 146, three hoses 147, three solenoid valves 148, three paint rollers 149, and three nozzles 150. The central axis of the rotating shaft 141 is longitudinally arranged at the longitudinal end of the bracket 2 away from the push handle 3. The support frame 143 is rotatably arranged at the outer end of the rotating shaft 141. The torsion spring 142 is sleeved on the rotating shaft 141 and its two ends are respectively connected to the support frame 143 and the bracket 2. The two swing frames 144 are respectively connected to the transverse ends of the support frame 143 through the two folding assemblies 145 to realize the swinging of the swing frames 144. The three paint rollers 149 are respectively connected to the support frame 143 and the two swing frames 144 through the three shock-absorbing assemblies 146. Each nozzle 150 is respectively arranged on the periphery of each paint roller 149 for spraying paint on the paint roller 149. The three hoses 147 are respectively connected to the output end of the delivery pump 13 and the nozzles 150. Each solenoid valve 148 is respectively arranged on the hose 147; The driving mechanism 6, the diesel generator 8, the storage battery 9, the heating mechanism 11, the stirring mechanism 12, the delivery pump 13, and the scribing mechanism 14 are respectively electrically connected to the control system 7.

[0019] In this embodiment, the driving mechanism 6 is a mechanism for driving the driving wheel 4 to rotate, which is a prior art and will not be elaborated here.

[0020] This road construction marking device is powered by a hybrid power supply system consisting of a diesel generator 8 and a battery 9. When operating continuously, it preferentially uses diesel power and switches to battery 9 power supply during standby. The energy consumption is reduced by 42% compared to pure fuel models, which is energy-saving and environmentally friendly. At the same time, the combination of drive wheels 4 and universal wheels 5 enables the device to flexibly turn and stably move forward on complex roads. The sidewall heating mechanism 11 of the tank body 101 cooperates with the built-in stirring mechanism 12 to maintain the best fluidity of the paint, preventing low-temperature solidification or high-temperature volatilization. The closed-loop temperature control system adjusts the heating power in real time through sensors to ensure stable paint performance. And the three groups of independent shock-absorbing paint rollers 149 cooperate with the folding swing frame 144 structure, which can automatically fit the road surface undulation with a tilt tolerance of ±15°, eliminating the influence of mechanical vibration on the marking thickness and achieving good marking effect. The rotating shaft 141 drives the support frame 143 to achieve 180° steering adjustment. Combined with three nozzles 150 controlled by solenoid valves 148, it supports the rapid switching of single-line, double-line and special markings. Each hose 147 is equipped with an independent solenoid valve 148, and the paint flow of different markings is precisely adjusted through the control system 7 to reduce material waste. The integrated design of the push handle and the universal wheel 5 improves the operation flexibility, and a single person can complete steering, starting and stopping, and parameter adjustment. The drive wheels 4 and the universal wheels 5 are placed at both ends of the frame to ensure the smooth movement of the device, and the maximum climbing angle reaches 20°. The control system 7 centrally manages the drive, temperature control, stirring and spraying modules, and realizes the automated construction of marking width, length and spacing through preset programs, reducing manual errors, with high marking efficiency and good marking effect.

[0021] Moreover, the control system 7 includes a controller 71, a first flow sensor 72 for respectively detecting the flow rates of the solenoid valves 148, a speed sensor 73 for detecting the traveling speed of the frame 1, and a pressure sensor 74 for respectively detecting the pressures of the paint rollers 149. The first flow sensor 72, the speed sensor 73 and the pressure sensor 74 are respectively electrically connected to the input end of the controller 71, and the solenoid valve 148 is electrically connected to the output end of the controller 71. By real-time feedback of data through the flow, speed and pressure sensors, flow compensation of the paint flow rate and the construction speed is achieved, and the controller automatically adjusts the opening degree of the solenoid valve to ensure uniform coating thickness, reduce manual intervention, and improve construction accuracy and efficiency.

[0022] Specifically, the flow rate of each solenoid valve 148 , where is the flow rate of each solenoid valve 148 respectively detected by each first flow sensor 72, is the pressure of the paint roller 149 detected by the pressure sensor 74, is the traveling speed of the frame 1 detected by the speed sensor 73, is a coefficient, and , where is the flow coefficient of the paint, is the orifice area of the nozzle, is the density of the coating material, is the thickness of the coating, is the width of the coating. A flow calculation model is established, and the coating characteristic coefficient is determined through experiments to achieve error compensation between the theoretical flow rate and the actual flow rate.

[0023] Furthermore, the control system 7 further includes a second flow sensor 75 for detecting the flow rate of the transfer pump 13. The second flow sensor 75 is electrically connected to the input end of the controller 71. The flow rate of the transfer pump 13 , the second flow sensor 75 detects the output flow rate of the pump body, constructs a dual-redundancy detection system for the pumping flow rate, compares it with the flow rate of the solenoid valve 148, identifies pipeline blockage or leakage, and adjusts the pump speed through the controller 71 to avoid coating waste or supply interruption.

[0024] In this embodiment, the tank body 101 of the storage tank 10 adopts a double-layer stainless steel structure, and the interlayer is filled with a ceramic fiber insulation layer 105. A temperature sensor 76 is provided at the bottom of the tank body 101. The tank cover 102 is hermetically connected to the tank body 101 through a quick-release flange 106. A pressure relief valve 107 and a visual liquid level window 108 are provided at the upper part of the tank body 101. The ceramic fiber insulation layer 105 reduces heat dissipation and reduces the energy consumption of the diesel generator 8. The quick-release flange 106 facilitates the cleaning and maintenance of the tank body 101. The pressure relief valve 107 and the visual liquid level window 108 improve the operation safety and prevent the pressure in the tank body 101 from being too high or the coating from overflowing.

[0025] In this embodiment, the heating mechanism 11 includes a plurality of PTC heating tapes 111 evenly distributed along the circumferential direction of the tank body 101. Aluminum heat dissipation fins 112 are covered outside each PTC heating tape 111. The outer wall of the tank body 101 is covered with a silicon aluminum heat insulation layer 113. The PTC heating tapes 111 are electrically connected to a temperature controller 78 provided at the bottom of the tank body 101. The self-limiting temperature characteristic of the PTC heating tapes 111 prevents overheating. The aluminum heat dissipation fins 112 improve the heat conduction efficiency. The silicon aluminum heat insulation layer 113 reduces the influence of the external environment on the temperature inside the tank. The temperature controller 78 realizes precise temperature control of ±2°C to ensure the fluidity of the coating.

[0026] The above-mentioned PTC heating tape 111 is an electric heating device based on the positive temperature coefficient (PTC) effect. Its working principle is to utilize the characteristic of the PTC thermistor, that is, the resistance value increases rapidly with the increase of temperature. When the heating tape is powered on, the PTC material inside starts to heat up. As the temperature rises, the resistance value increases rapidly, thereby restricting the current and achieving a constant temperature effect. It is a prior art and will not be elaborated here.

[0027] In this embodiment, the stirring mechanism 12 includes a stirring shaft 121 vertically extending into the tank body 101, stirring blades 122 provided at the lower part of the stirring shaft 121, and scraping blades 123 provided at the upper part. The top of the stirring shaft 121 is connected to a reduction motor 124 through a coupling. A torque sensor 77 is provided on the output shaft of the reduction motor 124. The stirring blades 122 improve the mixing efficiency of the bottom coating, the scraping blades 123 prevent coking on the side walls, and the torque sensor 77 monitors the stirring resistance to identify coating solidification or foreign object jamming and trigger an alarm to stop the machine.

[0028] In this embodiment, the folding assembly 145 includes an L-shaped hinge seat 201, a rotating arm 203 with a limiting groove 202, and a hydraulic locking device. The rotating arm 203 is rotatably connected to the hinge seat 201 through a pin shaft. The hydraulic locking device includes a hydraulic cylinder 204 and a plug pin 205 provided in the rotating arm 203. The plug pin 205 can be inserted into the positioning hole 206 of the swing frame 144 to achieve angle locking. The limiting groove 202 of the rotating arm 203 cooperates with the plug pin 205 and the positioning hole 206 to achieve multi-angle locking of the swing frame 144. The hydraulic locking device prevents the swing frame from shifting due to construction vibration and improves the stability of line marking.

[0029] In this embodiment, the shock absorption assembly 146 includes a spring damper 301 and a rubber buffer pad (not shown in the figure). Both ends of the spring damper 301 are respectively connected to a mounting seat 302 and a coating roller 149 through spherical hinges. The mounting seat 302 is fixedly provided on the support frame 143 or the swing frame 144. The rubber buffer pad is wrapped around the periphery of the spring damper 301. A pressure sensor 74 is provided at the bottom of the mounting seat 302. The combination of the spring damper 301 and the rubber buffer pad absorbs longitudinal / transverse vibrations to prevent the coating roller from jumping off the road surface; the pressure sensor 74 monitors the roller pressure in real time and automatically adjusts the shock absorption stiffness to adapt to different road surface hardnesses.

[0030] Furthermore, the control system 7 further includes a wireless communication module 79 and a touch control screen 80. The wireless communication module 79 supports 4G / 5G remote monitoring. The touch control screen 80 is provided with a working mode selection module, a parameter setting module, and a real-time monitoring interface. It supports remote fault diagnosis and software upgrade through the 4G / 5G module. The touch control screen 80 integrates parameter preset templates, such as lane line and zebra crossing modes, to switch the construction plan with one key. Moreover, the real-time monitoring interface displays key parameters such as flow rate, temperature, and pressure, reducing the operation difficulty.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0032] In the present invention, unless otherwise clearly defined and limited, terms such as "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0034] Although the present invention has been specifically shown and described with reference to the preferred embodiments, those skilled in the art should understand that various changes in form and details may be made to the present invention without departing from the spirit and scope of the present invention as defined by the appended claims.

Claims

1. A marking device for road construction, characterized in that: It includes a frame, a bracket, a push handle, a driving wheel, a universal wheel, a driving mechanism, a control system, a diesel generator, a battery, a storage tank, a heating mechanism, a stirring mechanism, a conveying pump and a marking mechanism. It is defined that the longitudinal direction is extended along the length direction of the frame, and the transverse direction is extended along the width direction of the frame. The driving wheel and the universal wheel are respectively arranged on the longitudinal sides of the lower part of the frame. The driving mechanism is connected to the driving wheel for driving the frame to move. The bracket is arranged on the upper part of the frame, the push handle is arranged on the longitudinal side of the frame close to the driving wheel and is connected to the bracket. The control system, diesel generator and battery are respectively arranged on the frame, the storage tank, the conveying pump and the marking mechanism are respectively arranged on the bracket. The storage tank includes a tank body and a tank cover arranged on the tank body. The tank body has a feed inlet and a discharge outlet. The heating mechanism is arranged on the side wall of the tank body, the stirring mechanism is arranged in the tank body, and the conveying pump is connected to the discharge outlet and the marking mechanism of the tank body. The marking mechanism includes a rotating shaft, a torsion spring, a support frame, two swing frames, two folding components, three shock absorbing components, three hoses, three solenoid valves, three paint rollers and three spray heads. The central axis of the rotating shaft is arranged on the longitudinal end of the support away from the push handle in the longitudinal direction. The support frame is rotatably arranged on the outer end of the rotating shaft. The torsion spring is sleeved on the rotating shaft and the two ends are respectively connected to the support frame and the support. The two swing frames are respectively connected to the lateral ends of the support frame through the folding components to realize the swing of the swing frame. The three paint rollers are respectively connected to the support frame and the two swing frames through the three shock absorbing components. The spray heads are respectively arranged on the peripheral sides of the paint rollers for spraying paint on the paint rollers. The three hoses are respectively connected to the output end of the delivery pump and the spray head. The solenoid valves are respectively arranged on the hoses. The driving mechanism, diesel generator, storage battery, heating mechanism, stirring mechanism, delivery pump and marking mechanism are electrically connected to the control system respectively.

2. The road construction marking device according to claim 1, characterized in that: The control system includes a controller, a first flow sensor for respectively detecting the flow of each solenoid valve, a speed sensor for detecting the traveling speed of the frame, and a pressure sensor for respectively detecting the pressure of each paint roller. The first flow sensor, speed sensor and pressure sensor are respectively electrically connected to the input end of the controller, and the solenoid valve is electrically connected to the output end of the controller.

3. The road construction marking device according to claim 2, characterized in that: The flow rate of each solenoid valve ,in, is the flow rate of each solenoid valve detected by each first flow sensor, is the pressure of the paint roller detected by the pressure sensor, is the speed of the frame detected by the speed sensor. is the coefficient, and ,in, is the flow coefficient of the coating, is the orifice area of ​​the nozzle, is the density of the coating, is the thickness of the coating, is the width of the coating.

4. The road construction marking device according to claim 3, characterized in that: The control system further comprises a second flow sensor for detecting the flow of the delivery pump, wherein the second flow sensor is electrically connected to the input end of the controller. .

5. The road construction marking device according to any one of claims 2 to 4, characterized in that: The shock absorbing assembly includes a spring damper and a rubber buffer pad. The two ends of the spring damper are respectively connected to the mounting seat and the paint roller through ball joints. The mounting seat is fixed on a support frame or a swing frame. The rubber buffer pad is coated on the periphery of the spring damper. The pressure sensor is arranged at the bottom of the mounting seat.

6. The road construction marking device according to claim 1, characterized in that: The tank body of the storage tank adopts a double-layer stainless steel structure, the interlayer is filled with a ceramic fiber insulation layer, a temperature sensor is provided at the bottom of the tank body, the tank cover is sealed and connected to the tank body through a quick-release flange, and a pressure relief valve and a visual liquid level window are provided on the top of the tank body.

7. The road construction marking device according to claim 1, characterized in that: The heating mechanism comprises a plurality of PTC heating belts evenly distributed along the circumference of the tank body, each PTC heating belt is covered with aluminum heat dissipation fins, the outer wall of the tank body is covered with an aluminum silicate insulation layer, and the PTC heating belt is electrically connected to a temperature controller arranged at the bottom of the tank body.

8. The road construction marking device according to claim 1, characterized in that: The stirring mechanism comprises a stirring shaft vertically extending into the tank body, stirring blades arranged at the lower part of the stirring shaft and scraping blades arranged at the upper part. The top of the stirring shaft is connected to a reduction motor through a coupling, and the output shaft of the reduction motor is provided with a torque sensor.

9. The road construction marking device according to claim 1, characterized in that: The folding assembly includes an L-shaped hinge seat, a swivel arm with a limit groove and a hydraulic locking device. The swivel arm is rotatably connected to the hinge seat through a pin shaft. The hydraulic locking device includes a hydraulic cylinder and a latch arranged in the swivel arm. The latch can be inserted into the positioning hole of the swing frame to achieve angle locking.

10. The road construction marking device according to claim 1, characterized in that: The control system also includes a wireless communication module and a touch control screen. The wireless communication module supports 4G / 5G remote monitoring. The touch control screen is provided with a working mode selection module, a parameter setting module and a real-time monitoring interface.

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