Bridge deck maintenance spraying device

Abstract

The utility model discloses a bridge deck maintenance spraying device which comprises a movable vehicle body and a spraying mechanism, and the movable vehicle body is used for position movement. The spraying mechanism comprises a storage barrel, a liquid supply assembly, an extension rod, a connecting rod and a spray head, the storage barrel is arranged on the movable vehicle body, the extension rod is arranged on one side of the movable vehicle body, and the connecting rod is rotationally connected to the top of the extension rod, is transversely parallel to the ground and can rotate in the horizontal plane; the multiple spray heads are arranged on the connecting rod, one end of the liquid supply assembly communicates with the storage barrel, and the other end of the liquid supply assembly communicates with the spray heads. The storage barrel and the spray heads are communicated through the liquid supply assembly, water can be stored for spraying, paint can also be stored for spraying, operation equipment does not need to be switched, an included angle is formed between the arrangement of the spray heads and the advancing direction by rotating the connecting rod and arranging the inclined spray heads, and therefore the coverage width of spraying is changed, the width of a bridge deck is matched, and the maintenance efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge deck maintenance, in particular to a bridge deck maintenance spraying device. Background Art

[0002] In the existing technology for road and bridge construction, after the bridge deck concrete is laid and initially solidified, it is necessary to spray the bridge deck concrete with water for maintenance. The purpose is to reduce the temperature gradient, avoid cracks caused by temperature changes, and reduce shrinkage cracks caused by drying. After the concrete bridge deck is cured and the strength reaches the required level, it is necessary to spray waterproof coating. Finally, after the waterproof coating is cured and accepted, the asphalt paving of the bridge deck is carried out.

[0003] In the prior art, water spraying maintenance is often performed by spraying water mist through atomizing spraying machinery. For example, Chinese Patent 202222860343.8 discloses a bridge deck concrete maintenance device for highway engineering bridge construction, comprising: a vehicle body with movable wheels installed on the lower surface of the vehicle body; a cleaning component, which is arranged on the side of the vehicle body and is used to process and collect impurities on the bridge deck; a driving mechanism, a swinging mechanism, and a nozzle, which, through the operation of the driving mechanism and the action of the swinging mechanism, drives the nozzle to rotate back and forth; and a spraying component, which, through the operation of the swinging mechanism and the action of the spraying component, causes the nozzle to spray water. Subsequent spraying of waterproof coating is generally performed by manually carrying mechanical spraying equipment, using the mechanical equipment to pressurize and spray, so that the waterproof coating is sprayed on the bridge deck.

[0004] The above-mentioned existing technologies, whether manual spraying or spraying with a narrow spraying pipe, have low maintenance efficiency and require reciprocating movement along the bridge deck. This is mainly due to the mismatch between the spraying coverage width and the bridge deck width, resulting in poor spraying efficiency. Therefore, how to adjust the spraying coverage width is a technical problem that needs to be solved. Utility Model Content

[0005] The purpose of the present invention is to overcome the above technical deficiencies and to provide a bridge deck maintenance spraying device to solve the technical problem in the prior art of how to adjust the coverage width of the spraying.

[0006] In order to achieve the above technical purpose, the present invention adopts the following technical solutions:

[0007] The utility model provides a bridge deck maintenance spraying device, comprising:

[0008] A mobile vehicle body for moving positions; and

[0009] The spraying mechanism includes a storage barrel, a liquid supply assembly, an extension rod, a connecting rod and a nozzle. The storage barrel is arranged on the mobile body, the extension rod is arranged on one side of the mobile body, the connecting rod is rotatably connected to the top of the extension rod, and is horizontally placed parallel to the ground and can be rotated in a horizontal plane. Several nozzles are arranged on the connecting rod, one end of the liquid supply assembly is connected to the storage barrel, and the other end thereof is connected to the nozzle, which is used to draw liquid in the storage barrel to the nozzle.

[0010] In some embodiments, a stirring mechanism is further included, which is disposed in the storage barrel for stirring.

[0011] In some embodiments, the mobile body includes a frame, rollers and a motor, the four rollers are movably arranged at the four corners of the bottom of the frame through a rotating shaft, a transmission shaft is arranged between a pair of rollers, the motor and the reducer are both arranged on one side of the frame, the power input end of the reducer is transmission-connected to the power output shaft of the motor, and the power output end of the reducer is transmission-connected to the transmission shaft.

[0012] In some embodiments, the stirring mechanism includes a connecting shaft, a stirring rod, a fixed seat, a first bevel gear and a second bevel gear. The connecting shaft passes through and is rotatably connected to the interior of the storage barrel. The stirring rod is arranged at the top end of the connecting shaft and is located on the inner side of the storage barrel. The fixed seat is arranged on the top of the frame. The first bevel gear is rotatably connected to the inner side of the fixed seat. A second bevel gear is arranged on the outer side of the transmission shaft, and the first bevel gear and the second bevel gear are engaged with each other.

[0013] In some embodiments, the connecting shaft includes a first shaft, a second shaft, a connecting sleeve, a first friction disc and a second friction disc, one end of the first shaft is connected to the stirring rod, and the other end is threadedly connected to the connecting sleeve through a thread, the first friction disc is arranged at the end of the connecting sleeve, and the two ends of the second shaft are respectively connected to the first bevel gear and the second friction disc, and the friction surfaces of the first friction disc and the second friction disc are opposite.

[0014] In some embodiments, the liquid supply assembly includes a pump body, a water inlet pipe, a liquid distribution pipe and a water outlet pipe. The pump body is arranged on the frame, the water inlet pipe is arranged between the pump body and the storage barrel, the liquid distribution pipe is arranged at the other end of the pump body, and several water outlet pipes are connected and communicated with the liquid distribution pipe.

[0015] In some embodiments, the interior of the connecting rod is hollow, the liquid inlet end of the pump body is communicated with the interior of the storage barrel through the water inlet pipe, the water outlet pipe is connected and communicated with the corresponding connecting rod, and the liquid outlet end of the pump body is communicated with the interior of the nozzle through the liquid distribution pipe, the water outlet pipe, and the hollow connecting rod.

[0016] In some embodiments, a battery is provided on the frame, and the battery is electrically connected to the pump body and the motor.

[0017] In some embodiments, a push rod is provided on the frame and is located above the storage barrel, and the push rod is close to the extension rod.

[0018] In some embodiments, the number of the extension rods and the connecting rods are both two, the two connecting rods are rotatably connected to the two extension rods respectively, and the two extension rods and the two connecting rods are symmetrically arranged with respect to the central axis of the mobile body, and the connecting rod is rotatably connected to the connecting rod through a damping shaft.

[0019] Compared with the prior art, the bridge deck maintenance spraying device provided by the present invention connects the storage barrel and the nozzle through a liquid supply component. It can store water for spraying or paint for spraying without switching operating equipment. The arrangement of the nozzles is tilted by rotating the connecting rod so that the arrangement of the nozzles forms an angle with the forward direction, thereby changing the coverage width of the spraying, adapting to the width of the bridge deck, and improving the maintenance efficiency. In addition, the connecting rod is further rotated to the top of the mobile body, parallel to the length of the mobile body, which can facilitate the transportation or storage of the device through other transport vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a bridge deck maintenance spraying device provided by an embodiment of the present utility model;

[0021] Figure 2 This is a bottom view of the structure of the bridge deck maintenance spraying device provided by an embodiment of the utility model;

[0022] Figure 3 This is a cross-sectional view of a storage barrel of a bridge deck maintenance spraying device provided by an embodiment of the present utility model;

[0023] Figure 4 This is a top view of the structure of the bridge deck maintenance spraying device provided by an embodiment of the utility model;

[0024] Figure 5 This is a rotational view of the connecting rod of the bridge deck maintenance spraying device provided by an embodiment of the utility model;

[0025] Figure 6 This is a bridge deck maintenance spraying device provided by the embodiment of the utility model Figure 1Magnified view at point A in the middle.

[0026] Description of reference numerals:

[0027] 1. Frame; 2. Roller; 3. Drive shaft; 4. Motor; 5. Reducer; 6. Storage tank; 7. Pump body; 8. Water inlet pipe; 9. Dispensing pipe; 10. Water outlet pipe; 11. Extension rod; 12. Connecting rod; 13. Spray nozzle; 14. Connecting shaft; 15. Stirring rod; 16. Fixing base; 17. First bevel gear; 18. Second bevel gear; 19. Connecting sleeve; 20. First friction disc; 21. Second friction disc; 22. Battery; 23. Push rod DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] In order to solve the technical problem of how to adjust the coverage width of spraying, the utility model provides a bridge deck maintenance spraying device, which can adjust the coverage width of spraying during bridge deck maintenance.

[0030] It should be noted that the bridge deck maintenance spraying device described in the present invention is used for but not limited to water spray maintenance and paint spraying of bridge deck maintenance. For the convenience of explanation, in the present invention, only the application of the bridge deck maintenance spraying device to water spray maintenance and paint spraying of bridge deck maintenance is taken as an example for explanation. The principle of applying the bridge deck maintenance spraying device to other spraying and coating construction is essentially the same as the principle applied to water spray maintenance and paint spraying of bridge deck maintenance, and will not be elaborated here.

[0031] See also Figure 1-6The utility model provides a technical solution: an environmentally friendly bridge deck maintenance spraying integrated device, including a mobile body and a spraying mechanism, the mobile body is used for position movement; the spraying mechanism includes a storage barrel 6, a liquid supply component, an extension rod 11, a connecting rod 12 and a spray head 13, the storage barrel 6 is arranged on the mobile body, the extension rod 11 is arranged on one side of the mobile body, the connecting rod 12 is rotatably connected to the top of the extension rod 11, and is horizontally parallel to the ground and can be rotated in a horizontal plane, a plurality of the spray heads 13 are arranged on the connecting rod 12, and a plurality of The nozzles 13 are arranged at equal distances along the length direction of the connecting rod 12. One end of the liquid supply component is connected to the storage barrel 6, and the other end is connected to the nozzle 13, which is used to extract the liquid in the storage barrel 6 to the nozzle 13. The storage barrel 6 can store water or paint, and both can be pumped out through the liquid supply component and sprayed at the nozzle 13 for water maintenance or paint spraying. In addition, by rotating and tilting the connecting rod 12, the arrangement of the nozzles forms an angle with the forward direction, thereby changing the coverage width of the spraying, which can be adapted to the width of the bridge deck.

[0032] In this embodiment, the number of the extension rods 11 and the connecting rods 12 are both two, and the two connecting rods 12 are rotatably connected to the two extension rods 11 respectively, and the two extension rods 11 and the two connecting rods 12 are symmetrically arranged with respect to the central axis of the mobile body, and the connecting rod 12 extends toward both sides of the mobile body, and its length is as long as possible to meet the longer bridge deck width. The connecting rod 12 is rotatably connected to the connecting rod 12 through a damping shaft. The damping shaft can ensure that the connecting rod 12 will not rotate without the action of manual rotation of the connecting rod 12. The connecting rod 12 of this device can be rotated, such as Figures 4 to 5 As shown in the state, its first purpose is to tilt the arrangement of the nozzles 13 so that the arrangement of the nozzles 13 forms an angle with the forward direction, so that the coverage width of the spraying of the nozzles 13 can be changed, so that according to the different rotation degrees of the connecting rods 12 on both sides, the device can spray and cover bridge decks of various widths; thereby improving the use effect of the device; its second purpose is that since the connecting rod 12 can be rotated, the connecting rod 12 can be rotated to be parallel to the length of the frame 1, so that the connecting rod 12 can be blocked at the upper end of the frame 1, so that the device can be conveniently transported or stored by other transport vehicles.

[0033] In one embodiment, see Figure 2The mobile body includes a frame 1, rollers 2 and a motor 4. The four rollers 2 are movably arranged at the four corners of the bottom of the frame 1 through a rotating shaft. A transmission shaft 3 is arranged between a pair of rollers 2. The two pairs of rollers 2 are respectively connected to a transmission shaft 3, and the transmission shaft 3 driven on the right side. The motor 4 and the reducer 5 are both fixedly arranged on one side of the frame 1, corresponding to the position of the pair of rollers 2 on the right side. The power input end of the reducer 5 is transmission-connected to the power output shaft of the motor 4, and the power output end of the reducer 5 is transmission-connected to the transmission shaft 3, that is, it is driven by the motor 4. Under the transmission of the reducer 5, the transmission shaft 3 is driven to rotate, driving the pair of rollers 2 to rotate, and providing moving power for the mobile body.

[0034] In one embodiment, see Figure 3 and Figure 6 In order to prevent the waterproof coating inside the storage barrel 6 from solidifying, a stirring mechanism is also included. The stirring mechanism is arranged in the storage barrel 6 for stirring. Please refer to Figure 3 and Figure 6 The stirring mechanism includes a connecting shaft 14, a stirring rod 15, a fixing seat 16, a first bevel gear 17 and a second bevel gear 18. The connecting shaft 14 passes through and is rotatably connected to the inside of the storage barrel 6. The connecting shaft 14 is located in the middle of the inner side of the storage barrel 6 and is rotatably connected through a bearing and is provided with a mechanical sealing structure to prevent liquid leakage from the rotating connection portion. The stirring rod 15 is provided at the top end of the connecting shaft 14 and is located on the inner side of the storage barrel 6. The liquid in the storage barrel 6 is stirred by the integral rotation of the connecting shaft 14 and the stirring rod 15. The body is stirred, and when the stored liquid is a paint that is easy to solidify, it has the effect of preventing it from solidifying. The fixed seat 16 is arranged on the top of the frame 1, and a rotating shaft extends from the first bevel gear 17 and is rotatably connected to the inner side of the fixed seat 16. A second bevel gear 18 is coaxially arranged on the outer side of the transmission shaft 3. The first bevel gear 17 and the second bevel gear 18 are engaged with each other. Through the rotation of the transmission shaft 3, the meshing transmission of the first bevel gear 17 and the second bevel gear 18 can drive the connecting shaft 14 and the stirring rod 15 to rotate.

[0035] It can be understood that since the operation of the present device is relatively stable, and a large amount of waterproof coating can be stored in the storage barrel 6 at one time, in order to prevent the waterproof coating from solidifying prematurely, the waterproof coating can be automatically stirred by the stirring mechanism to ensure the fluidity of the waterproof coating and prevent it from solidifying. Among them, as the device moves forward, the transmission shaft 3 will inevitably rotate, and the first bevel gear 17 will be driven to rotate through the second bevel gear 18, thereby driving the connecting shaft 14 to rotate, so that the stirring rod 15 can be rotated, so that the waterproof coating can be automatically stirred by the stirring mechanism to ensure the fluidity of the waterproof coating and prevent the coating from solidifying prematurely.

[0036] In one embodiment, see Figure 3 and Figure 6 In order to cut off the rotational transmission of the stirring rod 15 when spraying water, the connecting shaft 14 includes a first shaft, a second shaft, a connecting sleeve 19, a first friction disc 20 and a second friction disc 21. One end of the first shaft is connected to the stirring rod 15, and the other end is threadedly connected to the connecting sleeve 19 through a thread. The first friction disc 20 is arranged at the end of the connecting sleeve 19, and the two ends of the second shaft are respectively connected to the first bevel gear 17 and the second friction disc 21, and the friction surfaces of the first friction disc 20 and the second friction disc 21 are opposite to each other. When the friction surfaces of the first friction disc 20 and the second friction disc 21 abut, friction force is provided for transmission, that is, the second shaft can drive the first shaft to rotate, thereby forming a rotational drive of the stirring rod 15, and when the connecting sleeve 19 is rotated to separate the friction surfaces of the first friction disc 20 and the second friction disc 21, the transmission between the first shaft and the second shaft can be disconnected.

[0037] It can be understood that since the device can store both water and waterproof coating for use, and the stored water does not need to be stirred, the power transmission of the stirring rod 15 can be interrupted by controlling the separation of the first friction disc 20 and the second friction disc 21, so that the stirring rod 15 does not consume meaningless kinetic energy.

[0038] In one embodiment, see Figure 2 and Figure 3 The liquid supply assembly includes a pump body 7, a water inlet pipe 8, a liquid distribution pipe 9 and a water outlet pipe 10. The pump body 7 is fixedly mounted on the frame 1. The water inlet pipe 8 is arranged between the pump body 7 and the storage barrel 6. The liquid distribution pipe 9 is arranged at the other end of the pump body 7. Several water outlet pipes 10 are connected and communicated with the liquid distribution pipe 9. The liquid in the storage barrel 6 is pumped out through the water inlet pipe 8 by the pump body 7, and then transported through the liquid distribution pipe 9 and the water outlet pipe 10.

[0039] Furthermore, the interior of the connecting rod 12 is hollow, and the liquid inlet end of the pump body 7 is connected to the interior of the storage barrel 6 through the water inlet pipe 8. The water outlet pipe 10 is connected and communicated with the corresponding connecting rod 12. The liquid outlet end of the pump body 7 is connected to the interior of the nozzle 13 through the liquid separation pipe 9, the water outlet pipe 10, and the hollow connecting rod 12. The clean water or waterproof coating in the storage barrel 6 can be pumped into the nozzle 13 through the liquid separation pipe 9, the water outlet pipe 10, and the hollow connecting rod 12 by the pump body 7. Then, it can be sprayed from the inside of the nozzle 13, so that it can be evenly sprayed on the bridge deck. If it is clean water, it can be used to maintain the concrete bridge deck. At the same time, when spraying waterproof coating, a large amount of water can be sprayed to rinse the bridge deck. After the bridge deck is dried to a predetermined value, the waterproof coating can be stored in the storage barrel 6 and then pumped out by the pump body 7. In this way, it can play an integrated role; this device can be used for maintenance, flushing, and spraying.

[0040] In one embodiment, see Figure 1 The frame 1 is provided with a push rod 23 located above the storage barrel 6, and the push rod 23 is close to the extension rod 11. The push rod 23 can facilitate the staff to push the device to move. Although the motor 4 drives the device as a whole to move when the device moves, manual pushing of the push rod 23 can still be used for trimming in a certain direction. In addition, due to the existence of the extension rod 11, there is a space between the connecting rod 12 and the push rod 23. In this way, the staff stands inside the space and moves forward with the device. At this time, the nozzle 13 is behind the worker's forward path, so as to avoid stepping on the waterproof coating that has just been sprayed and has not yet solidified.

[0041] In one embodiment, see Figure 1 In order to facilitate the provision of power, a battery 22 is provided on the frame 1. The battery 22 is electrically connected to the pump body 7 and the motor 4. The battery 22 can provide electrical energy to the pump body 7 and the motor 4.

[0042] In order to better understand the present invention, the following Figures 1 to 6 The technical solution of the utility model is described in detail: When the device is used, the movement of the device is driven by the motor 4 to drive the reducer 5 to rotate, and then the reducer 5 drives the transmission shaft 3 and the front roller 2 to rotate, thereby driving the device to move;

[0043] When using the device according to the construction steps of the bridge deck, when the concrete has just solidified, clean water should be sprayed first to replenish water and maintain the concrete bridge deck to ensure the final forming strength of the concrete bridge deck; then, after the concrete bridge deck is completely solidified, clean water can be sprayed again to rinse the concrete bridge deck to facilitate the subsequent waterproof coating spraying work; after the dryness of the bridge deck reaches a predetermined value, the waterproof coating can be sprayed;

[0044] When it is necessary to spray the waterproof coating, the storage barrel 6 can be used to store the waterproof coating, so that the pump body 7 can be used to make the spray head 13 spray the waterproof coating. At this time, as the device moves forward, the spraying area covered by the multiple spray heads 13 can be evenly sprayed with the waterproof coating. Such an integrated setting is convenient to use and there is no need to prepare multiple sets of tools.

[0045] When the device moves forward to spray the waterproof coating, the connecting sleeve 19 can be screwed to rotate the first friction disc 20 and the second friction disc 21 so as to squeeze each other, thereby linking the first bevel gear 17 and the connecting shaft 14. At this time, as the device moves forward, the transmission shaft 3 will inevitably rotate, which will drive the first bevel gear 17 to rotate through the second bevel gear 18, thereby driving the connecting shaft 14 to rotate, thereby causing the stirring rod 15 to rotate. In this way, the waterproof coating can be automatically stirred by the stirring mechanism to ensure the fluidity of the waterproof coating and prevent the coating from solidifying prematurely.

[0046] Furthermore, when the device is in use, since the device can store both water and waterproof coating for use, and the stored water does not need to be stirred, the first friction disc 20 and the second friction disc 21 are controlled to separate, thereby interrupting the power transmission of the stirring rod 15, so that the stirring rod 15 does not consume meaningless kinetic energy;

[0047] And when the device is used, the connecting rod 12 can be rotated. Figures 4 to 5 As shown in the state, its first purpose is to tilt the arrangement of the nozzles 13 so that the arrangement of the nozzles 13 forms an angle with the forward direction, so that the coverage width of the spraying of the nozzles 13 can be changed, so that according to the different rotation degrees of the connecting rods 12 on both sides, the device can spray and cover bridge decks of various widths; thereby improving the use effect of the device; its second purpose is that since the connecting rod 12 can be rotated, the connecting rod 12 can be rotated to be parallel to the length of the frame 1, so that the connecting rod 12 can be blocked at the upper end of the frame 1, which can facilitate the transportation or storage of the device through other transport vehicles.

[0048] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A bridge deck maintenance spraying device, characterized in that: include: Mobile body, used for position movement; as well as The spraying mechanism includes a storage barrel, a liquid supply assembly, an extension rod, a connecting rod and a nozzle. The storage barrel is arranged on the mobile body, the extension rod is arranged on one side of the mobile body, the connecting rod is rotatably connected to the top of the extension rod, and is horizontally placed parallel to the ground and can be rotated in a horizontal plane. Several nozzles are arranged on the connecting rod, one end of the liquid supply assembly is connected to the storage barrel, and the other end thereof is connected to the nozzle, which is used to draw liquid in the storage barrel to the nozzle.

2. The bridge deck maintenance spraying device according to claim 1, characterized in that: It also includes a stirring mechanism, which is arranged in the storage barrel and is used for stirring.

3. The bridge deck maintenance spraying device according to claim 2, characterized in that: The mobile vehicle body includes a frame, rollers and an electric motor. The four rollers are movably arranged at the four corners of the bottom of the frame through a rotating shaft. A transmission shaft is arranged between a pair of rollers. The electric motor and the reducer are both arranged on one side of the frame. The power input end of the reducer is transmission-connected to the power output shaft of the electric motor, and the power output end of the reducer is transmission-connected to the transmission shaft.

4. The bridge deck maintenance spraying device according to claim 3, characterized in that: The stirring mechanism includes a connecting shaft, a stirring rod, a fixed seat, a first bevel gear and a second bevel gear. The connecting shaft passes through and is rotatably connected to the interior of the storage barrel. The stirring rod is arranged at the top end of the connecting shaft and is located on the inner side of the storage barrel. The fixed seat is arranged on the top of the frame. The first bevel gear is rotatably connected to the inner side of the fixed seat. The second bevel gear is arranged on the outer side of the transmission shaft. The first bevel gear and the second bevel gear are meshed with each other.

5. The bridge deck maintenance spraying device according to claim 4, characterized in that: The connecting shaft includes a first shaft, a second shaft, a connecting sleeve, a first friction disc and a second friction disc. One end of the first shaft is connected to the stirring rod, and the other end is threadedly connected to the connecting sleeve through a thread. The first friction disc is arranged at the end of the connecting sleeve. The two ends of the second shaft are respectively connected to the first bevel gear and the second friction disc, and the friction surfaces of the first friction disc and the second friction disc are opposite to each other.

6. The bridge deck maintenance spraying device according to claim 5, characterized in that: The liquid supply assembly includes a pump body, a water inlet pipe, a liquid distribution pipe and a water outlet pipe. The pump body is arranged on the frame, the water inlet pipe is arranged between the pump body and the storage barrel, the liquid distribution pipe is arranged at the other end of the pump body, and several water outlet pipes are connected and communicated with the liquid distribution pipe.

7. The bridge deck maintenance spraying device according to claim 6, characterized in that: The interior of the connecting rod is hollow, the liquid inlet end of the pump body is communicated with the interior of the storage barrel through the water inlet pipe, the water outlet pipe is connected and communicated with the corresponding connecting rod, and the liquid outlet end of the pump body is communicated with the interior of the nozzle through the liquid distribution pipe, the water outlet pipe, and the hollow connecting rod.

8. The bridge deck maintenance spraying device according to claim 7, characterized in that: A battery is provided on the vehicle frame, and the battery is electrically connected to the pump body and the motor.

9. The bridge deck maintenance spraying device according to claim 8, characterized in that: The frame is provided with a push rod located above the storage barrel, and the push rod is close to the extension rod.

10. The bridge deck maintenance spraying device according to claim 9, characterized in that: There are two extension rods and two connecting rods, and the two connecting rods are rotatably connected to the two extension rods respectively. The two extension rods and the two connecting rods are symmetrically arranged with respect to the central axis of the mobile body, and the connecting rod is rotatably connected to the connecting rod via a damping shaft.

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