A spraying device for road and bridge construction

Abstract

The present invention discloses a spraying device for road and bridge construction, which relates to the technical field of road and bridge construction, and includes a spraying device. A heating bin is fixedly connected inside the spraying device, and a stirring bin is fixedly connected to the bottom end of the heating bin. The input end of the second water pump penetrates into the stirring bin through a water pipe. The rubber pipe and the far end of the heating pipe are mutually close and form a main air pipe extending outside the spraying device. One end of the main air pipe far from the spraying device is fixedly connected with a spraying structure, and the spraying structure includes a spray head, an exhaust air pipe, a fixed gear, a toothed plate, an electric push rod and a housing. In the present invention, the heating pipe in the heating bin preheats the air, and the rectangular heat flow is released from the rear air outlet to instantly dry the sprayed area. The operator moves the device through the handle to realize the synchronous operation of spraying and drying. This structure solves the problems of paint condensation and spray hole blockage in low-temperature and high-humidity environments, and at the same time optimizes the paint mixing ratio efficiency and spraying continuity.

Description

Technical Field

[0001] The present invention relates to the technical field of road and bridge construction, and particularly to a spraying device for road and bridge construction. Background Art

[0002] As a link in transportation, bridges play a crucial role in the construction of modern social transportation networks. The service life of bridges is generally 100 - 120 years. Steel box girders are widely used in large bridges due to their fast construction speed and strong load-bearing capacity. The painting quality of steel box girder painting is an important consideration factor in the construction, maintenance, and use of large bridges. Spraying is a painting method that disperses into uniform and fine droplets through a spray gun or a disc atomizer with the help of pressure or centrifugal force and is applied to the surface of the object to be painted. It can be divided into air spraying, airless spraying, electrostatic spraying, and various derivative methods of the above basic spraying forms, such as large-flow low-pressure atomization spraying, thermal spraying, automatic spraying, multi-group spraying, etc. Spraying operations have high production efficiency, are suitable for manual operations and industrial automation production, and also play a certain role in road maintenance, such as spraying anti-corrosion coatings on the surfaces of concrete bridge piers and beam bodies to prevent carbonation and chloride ion penetration and protect the internal steel bars.

[0003] Most of the existing spraying devices for road and bridge construction have the following problems during use:

[0004] When the environmental temperature is relatively low, the viscosity of the anti-corrosion coating increases significantly, resulting in a decrease in its fluidity and making it difficult to carry out spraying operations smoothly. At the same time, low temperature will delay the curing reaction of the coating and affect the film-forming quality of the coating. In addition, when constructing in enclosed spaces such as the bottom of bridges, due to the relatively high air humidity, a condensed water film is likely to form on the surface of the substrate, reducing the adhesion of the coating and even causing defects such as sagging and blistering, seriously affecting the construction efficiency and the coating protection effect.

[0005] The ratio of the anti-corrosion coating needs to be dynamically adjusted according to the on-site temperature, humidity, and construction conditions, and needs to be fully stirred to ensure uniform mixing. This process takes a long time and reduces the overall spraying efficiency.

[0006] After the spraying operation is completed, the nozzle is easily blocked due to the solidification of the coating and needs to be disassembled and cleaned daily, increasing the maintenance cost. In addition, the precision components of the spraying device operate in a dust environment for a long time, and the failure rate increases significantly, further affecting the construction progress. Summary of the Invention

[0007] Based on this, the purpose of the present invention is to provide a spraying device for road and bridge construction to solve the technical problems that most spraying devices for road and bridge construction are affected by low temperature and high humidity during coating spraying, the ratio adjustment is time-consuming, the nozzle is easily blocked, and the failure rate of the device is high.

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a spraying device for road and bridge construction, comprising a spraying device, wherein a heating bin is fixedly connected inside the spraying device, a stirring bin is fixedly connected at the bottom end of the heating bin, a stirring rod is rotatably connected inside the stirring bin, a second gear is fixedly connected to the top end of the stirring rod, a first motor is fixedly connected inside the spraying device, an output end of the first motor is fixedly connected to a first water pump via a coupling, an input end of the first water pump is respectively fixedly connected to two groups of extraction pipes, an output end of the first water pump is connected to the inside of the stirring bin via a water pipe, a second motor is fixedly connected inside the spraying device, an output end of the second motor is fixedly connected to a second water pump via a coupling, and an input end of the second water pump is connected to the inside of the stirring bin via a water pipe. The output end of the second water pump is connected with the rubber tube, and the interface is sealed. The bottom end of the heating chamber is fixedly connected with a heating tube. The bottom end of the heating chamber is provided with a heating tube, and the heating tube is connected with the inside of the heating chamber. The far ends of the rubber tube and the heating tube are close to each other to form a main air pipe extending to the outside of the spraying equipment. The end of the main air pipe away from the spraying equipment is fixedly connected with a spraying structure. The spraying structure includes an injection head, an exhaust pipe, a fixed gear, a tooth plate, an electric push rod and a shell. The injection head is rotatably connected to the inside of the shell, and the exhaust pipe is rotatably connected to the inside of the shell. The two sets of fixed gears are respectively fixedly connected to the injection head and one end of the exhaust pipe. The tooth plate is slidably connected to one end of the shell, the electric push rod is fixedly connected to the bottom end of the shell, and the shell is fixedly connected to the top of the main air pipe.

[0009] By adopting the above technical solution, the exhaust blades are synchronously driven by the belt on the outside of the pulley, so that the exhaust blades rotate at high speed, thereby extracting the warm air in the heating chamber, and passing through the heating pipe and the main air pipe, and discharged from the exhaust pipe arranged in the spraying equipment, thereby heating the multiple groups of spray heads, so as to prevent the spray holes of the spray heads from being blocked by the solidified paint sprayed last time during the subsequent spraying work, affecting the subsequent spraying efficiency. When the preheating is completed, the spray holes of the spray heads are fully opened, and the electric push rod is used to make the fixed gear drive the multiple groups of spray heads to rotate vertically.

[0010] Furthermore, the outer teeth of the fixed gear are meshed with the tooth grooves of the tooth plate, the output end of the electric push rod is fixedly connected to the tooth plate, the interior of the heating pipe is provided with exhaust blades, the output end of the second motor is fixedly connected to a pulley through a coupling, the pulley arranged on the outer side of the output end of the second motor rotates synchronously with the exhaust blades through a belt, the top end of the stirring rod is fixedly connected to a second gear, the output end of the first motor is fixedly connected to a first gear through a coupling, and the second gear and the first gear are connected through a toothed belt.

[0011] By adopting the above technical solution, the coating is started to be put into the two sets of material storage cavities arranged on the back of the main body, and then through the control device, the coating to be extracted is set, and then by starting the first motor, the output end of the first motor can drive the impeller in the first water pump to rotate at a high speed, so as to extract the coating in the two sets of material storage cavities arranged at one end of the main body.

[0012] Further, a trolley is fixedly connected to the bottom end of the spraying device. A cavity matching the heating bin is opened inside the trolley. A plurality of through holes are opened at the bottom end of the heating bin. A handle matching the spraying structure is arranged on the outer side of the main air pipe.

[0013] By adopting the above technical solution, while extracting, the throttle valve arranged in the material extraction pipe controls the extraction flow rate, so as to accurately control the coating, prevent the flow rates of the two groups of coatings from being uncontrolled, and thus prevent precise stirring and mixing. When the two groups of quantitatively measured coatings are pumped into the mixing bin by the first water pump, the stirring rod in the mixing bin will be driven by the second gear arranged at its top end. Since the toothed belt arranged outside the second gear is fitted with the first gear, and the first gear is fixed on the output end of the first motor.

[0014] Further, two sets of material storage cavities are arranged at one end of the spraying device. A material extraction pipe is arranged inside the material storage cavity, and the material extraction pipe is fixedly connected to the first water pump. The bottom end of the second gear is fixedly connected to a stirring rod located inside the mixing bin. The second motor and the first motor are fixed inside the spraying device by screws.

[0015] By adopting the above technical solution, by starting the second motor, the second motor drives the second water pump at its output end to rotate at a high speed through a coupling, and the output end of the second water pump is connected to the mixing bin, so that the well-stirred coating in the mixing bin can be pumped into the rubber pipe by the second water pump. And while the second motor is rotating, the air extraction blades are also rotating synchronously, so as to extract the hot air in the heating bin and pump it into the heating pipe. Then it mainly passes through the main air pipe composed of the cooperation of the heating pipe and the rubber pipe. And while flowing in the main air pipe, due to the special shape of the main air pipe, the hot air in the heating pipe will continuously keep the coating in the rubber pipe warm and will not cause the coating in the rubber pipe to be cooled by the external cold air.

[0016] In summary, the present invention mainly has the following beneficial effects: The present invention preheats the air through the heating pipes in the heating bin. When the temperature reaches the standard, the second motor is started to drive the air extraction blades, and the hot air is transported through the main air pipe to the air outlet to continuously heat the spray head to prevent the paint from solidifying and blocking. After the preheating is completed, the spray head is vertically opened. After the staff injects the paint into the storage bin, the first motor drives the water pump to quantitatively extract two groups of paints, and the flow rate is controlled by the throttle valve to ensure accurate mixing ratio. The stirring rod driven by the gear in the stirring bin slowly stirs the paint. At the same time, the heating pipes in the heating bin conduct heat evenly to the stirring bin through the side wall to keep the paint at an appropriate temperature. After mixing, the second motor synchronously drives the water pump and the air extraction blades to pump the paint to the spraying mechanism through the heat-insulating rubber pipe, and the hot air maintains the fluidity of the paint through the main air pipe. During spraying, multiple spray heads evenly spray the bottom of the bridge, and the rectangular heat flow released from the rear air outlet immediately dries the sprayed area. The operator moves the equipment through the handle to realize the synchronous operation of spraying and drying. This structure solves the problems of paint condensation and spray hole blockage in low-temperature and high-humidity environments, and at the same time optimizes the paint mixing ratio efficiency and spraying continuity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present invention from the first perspective;

[0018] Figure 2 is a schematic diagram of the overall structure of the present invention from the first perspective;

[0019] Figure 3 is a schematic diagram of a partial structure of the present invention;

[0020] Figure 4 is of the present invention Figure 3 enlarged view of part A;

[0021] Figure 5 is a schematic diagram of the internal structure of the present invention;

[0022] Figure 6 is of the present invention Figure 5 enlarged view of part B;

[0023] Figure 7 is a schematic diagram of a partial structure of the present invention from the first perspective;

[0024] Figure 8 is of the present invention Figure 7 enlarged view of part C;

[0025] Figure 9 is a schematic diagram of a partial structure of the present invention from the second perspective;

[0026] Figure 10 is of the present invention Figure 9 enlarged view of part D.

[0027] Figure 11This is a partial structural schematic diagram of the present invention.

[0028] In the figure: 1, spraying equipment; 2, trolley; 3, main air pipe; 4, material storage cavity; 5, spraying structure; 501, spray head; 502, exhaust duct; 503, fixed gear; 504, toothed plate; 505, electric push rod; 506, housing; 6, toothed belt; 7, first gear; 8, second gear; 9, first water pump; 10, first motor; 11, stirring rod; 12, heating pipe; 13, second motor; 14, heating pipe; 15, rubber pipe; 16, second water pump; 17, exhaust fan blade; 18, cavity; 19, heating chamber; 20, stirring chamber; 21, material extraction pipe; 22, throttle valve; 23, belt. Specific embodiments

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation to the present invention.

[0030] The embodiments of the present invention will be described below according to its overall structure.

[0031] A spraying device for road and bridge construction, as Figures 1-11As shown in the figure, it includes a spraying device 1. Inside the spraying device 1, a heating bin 19 is fixedly connected. At the bottom end of the heating bin 19, a stirring bin 20 is fixedly connected. Inside the stirring bin 20, a stirring rod 11 is rotatably connected. At the top end of the stirring rod 11, a second gear 8 is fixedly connected. Inside the spraying device 1, a first motor 10 is fixedly connected. The output end of the first motor 10 is fixedly connected with a first water pump 9 through a coupling. The input ends of the first water pump 9 are respectively fixedly connected with two groups of material suction pipes 21. The output end of the first water pump 9 is connected to the inside of the stirring bin 20 through a water pipe. Inside the spraying device 1, a second motor 13 is fixedly connected. The output end of the second motor 13 is fixedly connected with a second water pump 16 through a coupling. The input end of the second water pump 16 is connected to the inside of the stirring bin 20 through a water pipe. The output end of the second water pump 16 is communicated with a rubber pipe 15, and the interface is sealed. At the bottom end of the heating bin 19, a heating pipe 12 is fixedly connected. At the bottom end of the heating bin 19, a heating pipe 14 is provided, and the heating pipe 14 is communicated with the inside of the heating bin 19. The rubber pipe 15 and the far end of the heating pipe 14 are close to each other and extend to the main air pipe 3 outside the spraying device 1. One end of the main air pipe 3 far from the spraying device 1 is fixedly connected with a spraying structure 5. The spraying structure 5 includes a spray head 501, an exhaust pipe 502, a fixed gear 503, a toothed plate 504, an electric push rod 505 and a housing 506. The spray head 501 is rotatably connected to the inside of the housing 506. The exhaust pipe 502 is rotatably connected to the inside of the housing 506. Two groups of fixed gears 503 are respectively fixedly connected to one end of the spray head 501 and the exhaust pipe 502. The toothed plate 504 is slidably connected to one end of the housing 506. The electric push rod 505 is fixedly connected to the bottom end of the housing 506. The housing 506 is fixedly connected to the top end of the main air pipe 3. Among them, by starting the second motor 13, the second motor 13 drives the second water pump 16 at its output end to rotate at a high speed through a coupling, and the second water pump 16 is connected to the inside of the stirring bin 20 at the output end, so that the paint stirred well inside the stirring bin 20 can be pumped into the rubber pipe 15 through the second water pump 16. And while the second motor 13 is rotating, the air extraction blade 17 is also rotating synchronously, so as to extract the hot air in the heating bin 19 and draw it into the heating pipe 12. Then it mainly passes through the main air pipe 3 composed of the heating pipe 12 and the rubber pipe 15. And while flowing in the main air pipe 3, because of the special shape of the main air pipe 3, the hot air in the heating pipe 12 will continuously keep the paint in the rubber pipe 15 warm, and the paint in the rubber pipe 15 will not be cooled by the outside cold air;

[0032] Exemplarily, the outer teeth of the fixed gear 503 are meshed with the tooth grooves of the tooth plate 504, the output end of the electric push rod 505 is fixedly connected to the tooth plate 504, an exhaust blade 17 is arranged inside the heating pipe 14, the output end of the second motor 13 is fixedly connected to a pulley through a coupling, and the pulley arranged on the outer side of the output end of the second motor 13 rotates synchronously with the exhaust blade 17 through a belt 23, the top of the stirring rod 11 is fixedly connected to the second gear 8, the output end of the first motor 10 is fixedly connected to the first gear 7 through a coupling, and the second gear 8 and the first gear 7 are connected by a toothed belt 6, wherein the belt on the outer side of the pulley is connected to the second gear 8. 23 synchronously drives the exhaust blades 17, so that the exhaust blades 17 rotate at a high speed, thereby extracting the warm air in the heating chamber 19, and passing through the heating pipe 14 and the main air pipe 3, and discharged from the exhaust pipe 502 set in the spraying equipment 1, so as to heat the multiple groups of injection heads 501, so as to prevent the spray holes of the injection heads 501 from being blocked by the solidified paint sprayed last time and affecting the subsequent spraying efficiency during the subsequent spraying work. When the preheating is completed, the spray holes of the injection heads 501 are fully opened, and the electric push rod 505 is used to make the fixed gear 503 drive the multiple groups of injection heads 501 to rotate and present verticality;

[0033] Exemplarily, a trolley 2 is fixedly connected to the bottom end of the spraying equipment 1, and a cavity 18 matching with a heating bin 19 is provided inside the trolley 2. A plurality of through holes are provided at the bottom end of the heating bin 19, and a handle matching with the spraying structure 5 is provided on the outside of the main air pipe 3. Two groups of storage chambers 4 are provided at one end of the spraying equipment 1, and a suction pipe 21 is provided inside the storage chamber 4, and the suction pipe 21 is fixedly connected to the first water pump 9. The bottom end of the second gear 8 is fixedly connected to a stirring rod 11 located inside the stirring bin 20. The second motor 13 and the first motor 10 are fixed inside the spraying equipment 1 by screws, wherein paint is first put into the two groups of storage chambers 4 set on the back of the main body, and then the control device is used to set the paint to be extracted, and then the first motor 10 is started so that the output end of the first motor 10 can drive the impeller in the first water pump 9 to rotate at high speed, thereby extracting the paint in the two groups of storage chambers 4 set at one end of the main body.

[0034] The working principle of the present invention is as follows: when in use, the power is turned on, and an outside person starts the heating tube 12 in the heating chamber 19 inside the spraying equipment 1 through the control device, so that the heating tube 12 heats the hot air in the heating chamber 19. When the appropriate temperature is reached, the second motor 13 is started, and the second motor 13 rotates at a high speed, so that it drives the pulley fixed on the coupling to rotate;

[0035] The exhaust fan blades 17 are synchronously driven by the belt 23 outside the pulley, causing the exhaust fan blades 17 to rotate at high speed, thereby extracting the warm air in the heating bin 19 and discharging it through the heating pipe 14 and the main air pipe 3 from the exhaust air pipe 502 provided in the spraying device 1, so as to heat the multiple spray heads 501, thereby preventing the spray holes of the spray heads 501 from being blocked by the solidified coating sprayed last time and affecting the subsequent spraying efficiency. When the preheating is completed, the spray holes of the spray heads 501 are fully opened, and the electric push rod 505 is used to drive the fixed gear 503 to drive the multiple spray heads 501 to rotate and present vertically;

[0036] Then the staff starts to put the coating into the two storage chambers 4 provided on the back of the main body, and then through the control device, set the coating to be extracted, and then start the first motor 10, so that the output end of the first motor 10 can drive the impeller in the first water pump 9 to rotate at high speed, thereby extracting the coating in the two storage chambers 4 provided at one end of the main body;

[0037] During the extraction, the throttle valve 22 provided in the material extraction pipe 21 controls the extraction flow rate, so as to accurately control the coating, prevent the flow rates of the two coatings from being out of control, and thus prevent precise stirring and mixing;

[0038] When the two quantitative coatings are pumped into the mixing bin 20 by the first water pump 9, the mixing rod 11 in the mixing bin 20 will be driven by the second gear 8 provided at its top. Since the toothed belt 6 provided outside the second gear 8 is fitted with the first gear 7, and the first gear 7 is fixed on the output end of the first motor 10;

[0039] Therefore, the mixing rod 11 will mix synchronously. When the coating in the mixing bin 20 is slowly stirred by the mixing rod 11, the heating pipe 12 at the bottom of the heating bin 19 will also be heated to a certain extent, thereby significantly increasing the temperature in the heating bin 19 and heating the coating through the adjacent side walls. Also due to the groove design of the heating bin 19, the coating in the mixing bin 20 will be evenly heated and the temperature will not exceed the specified range;

[0040] Then, by starting the second motor 13, the second motor 13 drives the second water pump 16 at its output end to rotate at a high speed through a coupling, and the output end of the second water pump 16 is connected to the mixing chamber 20, so that the paint mixed well inside the mixing chamber 20 can be pumped into the rubber tube 15 through the second water pump 16. And while the second motor 13 is rotating, the air extraction blades 17 are also rotating synchronously, so as to extract the hot air in the heating chamber 19 and draw it into the heating pipe 12. Then, it mainly passes through the main air pipe 3 composed of the cooperation of the heating pipe 12 and the rubber tube 15. And while flowing in the main air pipe 3, due to the special shape of the main air pipe 3, the hot air in the heating pipe 12 will continuously keep the paint in the rubber tube 15 warm, and the paint in the rubber tube 15 will not be cooled by the outside cold air;

[0041] When it reaches the spraying structure 5, it can be sprayed on the bottom of the bridge through multiple spray heads 501 arranged inside. And the exhaust pipe 502 connected to the heating pipe 12 will spray the hot air in a rectangular shape, which is convenient for the staff to dry the area sprayed in front. The staff can hold the handle arranged outside the main air pipe 3 to control the movement of the spraying structure 5, so that the multiple spray heads 501 of the spraying structure 5 are in the front and the exhaust pipe 502 connected to the heating chamber 19 is in the rear for drying;

[0042] Through the above structure, the spraying device 1 for road and bridge construction can still be used under the influence of low temperature and high humidity on paint spraying, the spraying ratio adjustment time period is short, and the spray heads 501 are not easy to be blocked.

[0043] Although the embodiments of the present invention have been shown and described, the specific embodiments are only explanations of the present invention and not limitations to the invention. The specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can make modifications, substitutions and variations without creative contributions to the embodiments according to needs, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A spraying device for road and bridge construction, comprising a spraying device (1), characterized in that: The spraying device (1) is fixedly connected to a heating chamber (19) inside, the bottom end of the heating chamber (19) is fixedly connected to a stirring chamber (20), the stirring chamber (20) is rotatably connected to a stirring rod (11), the top end of the stirring rod (11) is fixedly connected to a second gear (8), the spraying device (1) is fixedly connected to a first motor (10) inside, the output end of the first motor (10) is fixedly connected to a first water pump (9) via a coupling, and the input end of the first water pump (9) is respectively fixedly connected to two sets of extraction pipes (21), the output end of the first water pump (9) is connected to the inside of the mixing chamber (20) through a water pipe, the inside of the spraying equipment (1) is fixedly connected to a second motor (13), the output end of the second motor (13) is fixedly connected to a second water pump (16) through a coupling, the input end of the second water pump (16) is connected to the inside of the mixing chamber (20) through a water pipe, the output end of the second water pump (16) is connected to the rubber tube (15), and the interface is sealed, and the bottom end of the heating chamber (19) is fixedly connected to a heating tube ( 12), a heating pipe (14) is provided at the bottom end of the heating chamber (19), and the heating pipe (14) is connected to the interior of the heating chamber (19), the rubber tube (15) and the heating pipe (14) are close to each other at the far end to form a main air pipe (3) extending to the outside of the spraying device (1), and the main air pipe (3) is fixedly connected to a spraying structure (5) at one end away from the spraying device (1), and the spraying structure (5) includes a spray head (501), an exhaust pipe (502), a fixed gear (503), a tooth plate (504), and an electric push rod ( The nozzle (501) is rotatably connected to the inside of the shell (506); the exhaust pipe (502) is rotatably connected to the inside of the shell (506); the two sets of fixed gears (503) are respectively fixedly connected to the nozzle (501) and one end of the exhaust pipe (502); the tooth plate (504) is slidably connected to one end of the shell (506); the electric push rod (505) is fixedly connected to the bottom end of the shell (506); and the shell (506) is fixedly connected to the top end of the main air pipe (3).

2. A spraying equipment for road and bridge construction according to claim 1, characterized in that: The outer teeth of the fixed gear (503) mesh with the tooth grooves of the tooth plate (504), and the output end of the electric push rod (505) is fixedly connected to the tooth plate (504).

3. The spraying equipment for road and bridge construction according to claim 1 is characterized in that: An exhaust blade (17) is arranged inside the heating pipe (14); the output end of the second motor (13) is fixedly connected to a pulley via a coupling; the pulley arranged outside the output end of the second motor (13) rotates synchronously with the exhaust blade (17) via a belt (23).

4. The spraying equipment for road and bridge construction according to claim 1 is characterized in that: The top end of the stirring rod (11) is fixedly connected to a second gear (8), the output end of the first motor (10) is fixedly connected to a first gear (7) via a coupling, and the second gear (8) and the first gear (7) are transmission-connected via a toothed belt (6).

5. The spraying equipment for road and bridge construction according to claim 1 is characterized in that: The bottom end of the spraying equipment (1) is fixedly connected to a trolley (2), and a cavity (18) matching with a heating chamber (19) is provided inside the trolley (2).

6. The spraying equipment for road and bridge construction according to claim 1, characterized in that: The bottom end of the heating chamber (19) is provided with a plurality of through holes, and the outside of the main air pipe (3) is provided with a handle that matches the spraying structure (5).

7. The spraying equipment for road and bridge construction according to claim 1 is characterized in that: Two groups of material storage chambers (4) are provided at one end of the spraying device (1), a material extraction pipe (21) is provided inside the material storage chamber (4), and the material extraction pipe (21) is fixedly connected to the first water pump (9).

8. The spraying equipment for road and bridge construction according to claim 1, characterized in that: The bottom end of the second gear (8) is fixedly connected to a stirring rod (11) located inside the stirring chamber (20), and the second motor (13) and the first motor (10) are fixed inside the spraying equipment (1) by screws.

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