Highway bridge maintenance spraying device

Abstract

The invention relates to the technical field of highway bridge maintenance, and provides a highway bridge maintenance spraying device which comprises a base, one end of the top of the base is fixedly connected with a mounting frame, the inner side of the mounting frame is rotatably connected with a reciprocating screw rod, the reciprocating screw rod is in threaded connection with a movable seat, and one side of the mounting frame is provided with a guide groove; a spraying mechanism is arranged at one end of the movable seat and comprises a rotating seat, the other end of the rotating seat is fixedly connected with a flow dividing pipe, the outer side of the flow dividing pipe is fixedly connected with a plurality of sprayers, the inner side of the movable seat is rotationally connected with a worm gear, one end of the inner side of the movable seat is rotationally connected with a worm meshed with the worm gear, and a linkage piece is arranged at one end of the worm. A water guide hose is fixedly connected to the top of the flow dividing pipe, a water supply mechanism is arranged at the inlet end of the water guide hose, and a transmission mechanism is arranged at the bottom end of the reciprocating lead screw. The purpose of a large spraying range is achieved by increasing the transverse spraying range of the spraying heads, the number of the spraying heads can be reduced, and the manufacturing cost can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of highway bridge maintenance, and in particular to a highway bridge maintenance spraying device. Background Art

[0002] Highway bridge engineering refers to the planning, design, construction, maintenance, and repair of structures across waters, valleys, and all traffic passages. In the construction of highway bridges, after the concrete pouring of the highway bridge is completed, in order to prevent the concrete from cracking, it is necessary to spray water on the poured concrete for maintenance. At present, there are many spray devices for spraying water on highway bridges in the existing technology.

[0003] After searching, the Chinese patent (Announcement No.: CN114892513B) disclosed "a highway bridge maintenance spraying device, comprising: a mobile support; a water tank, which is arranged on the mobile support; a spraying mechanism, which comprises: a support frame, which is located on one side of the mobile support and is used to cover the crash barrier of the bridge; a lifter, which is connected to the support frame and installed on the mobile support, and is used to adjust the height of the support frame; a spraying member, which is arranged on the support frame, and is used to spray the surface of the crash barrier; an adjustment positioning structure, which is arranged between the spraying member and the support frame, and is used to adjust the relative position between the spraying member and the support frame, and adjust the spraying direction of the spraying member";

[0004] However, in the process of implementing relevant technologies, the above patents have certain technical defects:

[0005] First, this type of patent can spray all three surfaces of the bridge by setting multiple groups of spaced spraying parts on the support frame. Although this spraying method can spray on multiple surfaces, a large number of nozzles need to be set up to increase the spraying range, which increases the manufacturing cost and requires frequent movement of the mobile bracket to adjust the spraying position, which increases the workload of each staff member;

[0006] Second, this type of patent uses a water pump to supply water and a lifting mechanism to adjust the height, and requires the installation of multiple driving sources to work, which not only increases the manufacturing cost, but also increases the cost of use. In view of this, the present invention proposes a highway bridge maintenance spray device. Summary of the invention

[0007] The invention provides a highway bridge maintenance spraying device, which solves the problem of high use cost in the prior art.

[0008] The technical solution of the present invention is as follows: a highway bridge maintenance spray device comprises a base, one end of the top of the base is fixedly connected to a mounting frame, the inner side of the mounting frame is rotatably connected to a reciprocating screw rod, the reciprocating screw rod is threadedly connected to a movable seat, one side of the mounting frame is provided with a guide groove slidably connected to the movable seat, the end of the movable seat away from the reciprocating screw rod is provided with a spray mechanism, the spray mechanism comprises a rotating seat, one end of the rotating seat is rotatably connected to the movable seat, the other end of the rotating seat is fixedly connected to a shunt pipe, the shunt pipe The outside of the tube is fixedly connected to a plurality of nozzles equidistantly distributed in the vertical direction, the inside of the movable seat is rotatably connected to a worm wheel coaxially fixed to the rotating seat, one end of the inner side of the movable seat is rotatably connected to a worm meshing with the worm wheel, one end of the worm is provided with a linkage member for driving the worm to reciprocate by cooperating with the vertical movement of the movable seat, the top of the diversion pipe is fixedly connected to a water-conducting hose, the inlet end of the water-conducting hose is provided with a water supply mechanism for supplying water, and the bottom end of the reciprocating screw is provided with a transmission mechanism for driving the reciprocating screw to rotate.

[0009] Preferably, the four corners of the bottom of the base are rotatably connected with walking wheels.

[0010] Preferably, the linkage includes a traveling gear fixedly connected to the end of the worm, and a plurality of racks equidistantly distributed in the vertical direction are fixedly connected to the inner side of the mounting frame. The traveling gear meshes with any one of the racks by cooperating with the vertical movement of the movable seat. A torsion spring is provided on the worm, one end of the torsion spring is welded to the movable seat, and the other end of the torsion spring is welded to the traveling gear.

[0011] Preferably, the water supply mechanism includes a pump body, which is fixedly connected to a mounting frame, a motor is fixedly installed at one end inside the mounting frame, the output shaft of the motor is fixedly connected to the impeller shaft of the pump body, the inlet end of the pump body is fixedly connected to a water inlet pipe, the inlet end of the water inlet pipe is fixedly connected to a water tank, the water tank is fixedly connected to the top of the base, the outlet end of the pump body is fixedly connected to a water outlet pipe, and the outlet end of the water outlet pipe is connected to the inlet end of the water guiding hose.

[0012] Preferably, the transmission mechanism includes a bevel gear 1 fixedly connected to the bottom end of the reciprocating screw rod, the bottom end of the inner side of the mounting frame is rotatably connected to a rotating shaft, one end of the rotating shaft is fixedly connected to a bevel gear 2 meshing with the bevel gear 1, and the other end of the rotating shaft is provided with a docking assembly for driving the rotating shaft to rotate.

[0013] Preferably, the docking assembly includes a spline fixedly connected to the end of the rotating shaft, a cylinder is fixedly connected to the inner side of the mounting frame, the output end of the cylinder is fixedly connected to a mounting plate, one end of the mounting plate is rotatably connected to a spline sleeve that passes through the mounting plate, the spline sleeve is sleeved on the spline and meshes with the spline, one end of the spline sleeve is fixedly connected to a docking block 1, the bottom end of the inner side of the mounting frame is rotatably connected to an elastic telescopic shaft, one end of the elastic telescopic shaft is fixedly connected to a docking block 2, the docking block 1 is slidably matched with the docking block 1 by cooperating with the translation of the spline sleeve, and the other end of the elastic telescopic shaft is provided with a speed change component that drives the elastic telescopic shaft to rotate by cooperating with the start of the motor.

[0014] Preferably, the speed changing component includes a large gear fixedly connected to one end of the elastic telescopic shaft, a small gear is rotatably connected to the inner side of the mounting frame, the small gear is meshed with the large gear, the small gear is coaxially fixedly connected to pulley one, the output shaft of the motor is fixedly connected to pulley two, and pulley two is connected to pulley one through a belt drive.

[0015] Preferably, the gear ratio between the pinion and the gear is 1:30.

[0016] Preferably, the elastic telescopic shaft includes a sleeve shaft rotatably connected to the inner side of the mounting frame, one end of the sleeve shaft is slidably connected to the plug shaft, the end of the plug shaft away from the sleeve shaft is fixedly connected to the docking block 2, the outer side of the plug shaft is fixedly connected to a limit bar, the limit bar is slidably connected to the inner wall of the sleeve shaft, the other end of the sleeve shaft is fixedly connected to the large gear, the inner side of the sleeve shaft is sleeved with a spring, one end of the spring is in contact with the plug shaft, and the other end of the spring is in contact with the inner wall of the sleeve shaft.

[0017] Preferably, a limiting groove matching the limiting strip is formed on the inner wall of the sleeve shaft, and the limiting strip can slide along the limiting groove.

[0018] The working principle and beneficial effects of the present invention are as follows: the water supply mechanism is started to supply water to the water guide hose, so that the water guide hose guides water into the inside of the diversion pipe, and then sprays water through each nozzle and toward the bridge to realize the spraying work; the reciprocating screw is driven to rotate by the transmission mechanism, so that the movable seat reciprocates in the vertical direction, so that the nozzle adjusts its height with the movement of the movable seat to spray different height areas of the bridge; at the same time, the linkage drives the worm to rotate reciprocatingly, so that the worm gear drives the rotating seat to rotate reciprocatingly, which makes the rotating seat drive the diversion pipe to swing back and forth, which can greatly increase the lateral spraying range of the nozzle, so that fewer nozzles can be set to achieve the purpose of a larger spraying range, thereby reducing the manufacturing cost, and can also reduce the movement frequency of the base to reduce the workload of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] Figure 1 It is a structural schematic diagram of a highway bridge maintenance spray device of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the spray mechanism of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the linkage member of the present invention;

[0023] Figure 4 It is a structural schematic diagram of the water supply mechanism of the present invention;

[0024] Figure 5 It is a structural schematic diagram of the transmission mechanism of the present invention;

[0025] Figure 6 It is a structural schematic diagram of the docking assembly of the present invention;

[0026] Figure 7 It is a schematic structural diagram of the speed change member of the present invention;

[0027] Figure 8 It is a schematic structural diagram of the elastic telescopic shaft of the present invention.

[0028] In the figure: 1, base; 2, walking wheel; 3, mounting frame; 4, movable seat; 5, guide groove; 6, spray mechanism; 61, rotating seat; 62, diverter pipe; 63, nozzle; 64, water guide hose; 65, worm gear; 66, worm; 67, linkage; 671, walking gear; 672, rack; 673, torsion spring; 7, water supply mechanism; 71, pump body; 72, motor; 73, water tank; 74, water inlet pipe; 75, water outlet pipe; 8, transmission mechanism; 81, bevel gear 1; 82, rotating shaft ;83, bevel gear 2;84, docking assembly;841, spline;842, cylinder;843, mounting plate;844, spline sleeve;845, docking block 1;846, elastic telescopic shaft;8461, sleeve shaft;8462, plug shaft;8463, limit strip;8464, spring;8465, limit groove;847, docking block 2;848, speed change part;8481, large gear;8482, small gear;8483, pulley 1;8484, pulley 2;9, reciprocating screw. DETAILED DESCRIPTION

[0029] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figures 1 to 8 As shown, this embodiment proposes a highway bridge maintenance spray device, including a base 1, the four corners of the bottom of the base 1 are rotatably connected to walking wheels 2, one end of the top of the base 1 is fixedly connected to a mounting frame 3, the inner side of the mounting frame 3 is rotatably connected to a reciprocating screw rod 9, and a movable seat 4 is threadedly connected to the reciprocating screw rod 9. A guide groove 5 slidably connected to the movable seat 4 is opened on one side of the mounting frame 3, and a spray mechanism 6 is provided at one end of the movable seat 4 away from the reciprocating screw rod 9. The spray mechanism 6 includes a rotating seat 61, one end of the rotating seat 61 is rotatably connected to the movable seat 4, and the other end of the rotating seat 61 is fixedly connected to a shunt pipe 62. The outer side of the shunt pipe 62 is fixedly connected to a plurality of nozzles 63 equidistantly distributed in the vertical direction; the inner side of the movable seat 4 is rotatably connected to a worm wheel 65 coaxially fixed to the rotating seat 61; one end of the inner side of the movable seat 4 is rotatably connected to a worm 66 meshing with the worm wheel 65; one end of the worm 66 is provided with a linkage member 67 for driving the worm 66 to reciprocate by cooperating with the vertical movement of the movable seat 4; the top of the shunt pipe 62 is fixedly connected to a water guide hose 64; the inlet end of the water guide hose 64 is provided with a water supply mechanism 7 for supplying water; the bottom end of the reciprocating screw 9 is provided with a transmission mechanism 8 for driving the reciprocating screw 9 to rotate.

[0031] The water supply mechanism 7 is started to supply water to the water guide hose 64, so that the water guide hose 64 guides the water into the diversion pipe 62, and then sprays it out through each nozzle 63 and toward the bridge to realize the spraying work. The reciprocating screw 9 is driven to rotate by the transmission mechanism 8, so that the movable seat 4 reciprocates in the vertical direction, so that the nozzle 63 adjusts its height with the movement of the movable seat 4 to spray different height areas of the bridge. At the same time, the linkage 67 drives the worm 66 to reciprocate, so that the worm gear 65 drives the rotating seat 61 to reciprocate, which makes the rotating seat 61 drive the diversion pipe 62 to swing back and forth, which can greatly increase the lateral spraying range of the nozzle 63. In this way, fewer nozzles 63 can be set to achieve the purpose of a larger spraying range, thereby reducing the manufacturing cost, and can also reduce the movement frequency of the base 1 to reduce the workload of the staff.

[0032] Furthermore, the linkage part 67 includes a traveling gear 671 fixedly connected to the end of the worm 66, and a plurality of racks 672 equidistantly distributed in the vertical direction are fixedly connected to the inner side of the mounting frame 3. The traveling gear 671 meshes with any one of the racks 672 by cooperating with the vertical movement of the movable seat 4. A torsion spring 673 is sleeved on the worm 66, one end of the torsion spring 673 is welded to the movable seat 4, and the other end of the torsion spring 673 is welded to the traveling gear 671.

[0033] The reciprocating screw rod 9 is driven to rotate by the transmission mechanism 8, so that the movable seat 4 reciprocates in the vertical direction, which makes the travel gear 671 move in the vertical direction. When the travel gear 671 is engaged with one of the racks 672, the travel gear 671 rotates. At this time, the torsion spring 673 is contracted to accumulate potential energy. When the travel gear 671 is disengaged from the rack 672, the torsion spring 673 releases the potential energy to make the travel gear 671 rotate in the opposite direction. In this cycle, the travel gear 671 can reciprocate, which makes the worm 66 reciprocate, and the worm wheel 65 drives the rotating seat 61 to reciprocate, which makes the rotating seat 61 drive the diverter pipe 62 to swing back and forth, which can greatly increase the lateral spraying range of the nozzle 63. In this way, fewer nozzles 63 can be set to achieve the purpose of a larger spraying range, thereby reducing the manufacturing cost.

[0034] Furthermore, the water supply mechanism 7 includes a pump body 71, which is fixedly connected to the mounting frame 3, and a motor 72 is fixedly installed at one end of the inner side of the mounting frame 3, and the output shaft of the motor 72 is fixedly connected to the impeller shaft of the pump body 71, and the inlet end of the pump body 71 is fixedly connected to an inlet pipe 74, and the inlet end of the inlet pipe 74 is fixedly connected to a water tank 73, and the water tank 73 is fixedly connected to the top of the base 1, and the outlet end of the pump body 71 is fixedly connected to a water outlet pipe 75, and the outlet end of the water outlet pipe 75 is connected to the inlet end of the water guiding hose 64.

[0035] By starting the motor 72 to drive the impeller shaft of the pump body 71 to rotate, the water inlet pipe 74 guides the water in the water tank 73 into the pump body 71, and then guides the water into the water hose 6 through the water outlet pipe 75, so that the water hose 64 guides the water into the diversion pipe 62, and then sprays it out through each nozzle 63 and sprays it toward the bridge to realize the spraying work.

[0036] Furthermore, the transmission mechanism 8 includes a bevel gear 1 81 fixedly connected to the bottom end of the reciprocating screw 9, the bottom end of the inner side of the mounting frame 3 is rotatably connected to a rotating shaft 82, one end of the rotating shaft 82 is fixedly connected to a bevel gear 2 83 meshing with the bevel gear 1 81, and the other end of the rotating shaft 82 is provided with a docking assembly 84 for driving the rotating shaft 82 to rotate, and the docking assembly 84 includes a spline 841 fixedly connected to the end of the rotating shaft 82, a cylinder 842 is fixedly connected to the inner side of the mounting frame 3, and the output end of the cylinder 842 is fixedly connected to a mounting plate 843, and one end of the mounting plate 843 is rotatably connected to a through-mounted The spline sleeve 844 of the mounting plate 843 is sleeved on the spline 841 and meshed with the spline 841. One end of the spline sleeve 844 is fixedly connected to a docking block 845. The bottom end of the inner side of the mounting frame 3 is rotatably connected to an elastic telescopic shaft 846. One end of the elastic telescopic shaft 846 is fixedly connected to a docking block 847. The docking block 845 is slidably matched with the docking block 845 by cooperating with the translation of the spline sleeve 844. The other end of the elastic telescopic shaft 846 is provided with a speed change component 848 which drives the elastic telescopic shaft 846 to rotate by cooperating with the start of the motor 72.

[0037] When the motor 72 is started, the speed change member 848 can drive the elastic telescopic shaft 846 to rotate, so that the docking block 847 rotates synchronously, and the control cylinder 842 drives the mounting plate 843 to move, so that the spline shaft sleeve 844 slides along the spline 841, so that the docking block 1 845 makes the docking block 2 847 cooperate, so that the docking block 2 847 drives the docking block 1 845 to rotate, so that the spline shaft sleeve 844 drives the spline 841 to rotate synchronously, so that the bevel gear 2 83 rotates, which makes the bevel gear 1 81 drive the reciprocating screw rod 9 to rotate, so that the movable seat 4 reciprocates in the vertical direction, which makes the travel gear 671 move in the vertical direction. When the travel gear When 671 is meshed with one of the racks 672, the traveling gear 671 rotates, and at this time the torsion spring 673 is contracted to accumulate potential energy. When the traveling gear 671 is disengaged from the rack 672, the torsion spring 673 releases the potential energy to make the traveling gear 671 rotate in the opposite direction. In this cycle, the traveling gear 671 can rotate back and forth, which makes the worm 66 rotate back and forth, and the worm wheel 65 drives the rotating seat 61 to rotate back and forth, which makes the rotating seat 61 drive the diverter pipe 62 to swing back and forth, which can greatly increase the lateral spraying range of the nozzle 63. In this way, fewer nozzles 63 can be set to achieve the purpose of a larger spraying range, thereby reducing the manufacturing cost.

[0038] Furthermore, the speed changing member 848 includes a large gear 8481 fixedly connected to one end of the elastic telescopic shaft 846, a small gear 8482 is rotatably connected to the inner side of the mounting frame 3, the small gear 8482 is meshed with the large gear 8481, the small gear 8482 is coaxially fixedly connected to a pulley 1 8483, the output shaft of the motor 72 is fixedly connected to a pulley 2 8484, the pulley 2 8484 is connected to the pulley 1 8483 through a belt drive, and the gear ratio of the small gear 8482 to the large gear 8481 is 1:30.

[0039] Furthermore, the elastic telescopic shaft 846 includes a sleeve shaft 8461 rotatably connected to the inner side of the mounting frame 3, one end of the sleeve shaft 8461 is slidably connected to the plug shaft 8462, the end of the plug shaft 8462 away from the sleeve shaft 8461 is fixedly connected to the docking block 847, the outer side of the plug shaft 8462 is fixedly connected to the limit strip 8463, the limit strip 8463 is slidably connected to the inner wall of the sleeve shaft 8461, the other end of the sleeve shaft 8461 is fixedly connected to the large gear 8481, the inner side of the sleeve shaft 8461 is sleeved with a spring 8464, one end of the spring 8464 is in contact with the plug shaft 8462, the other end of the spring 8464 is in contact with the inner wall of the sleeve shaft 8461, the inner wall of the sleeve shaft 8461 is provided with a limit groove 8465 matching the limit strip 8463, and the limit strip 8463 can slide along the limit groove 8465. The limit bar 8463 can limit the relative rotation between the sleeve shaft 8461 and the plug shaft 8462, so that the plug shaft 8462 always rotates synchronously with the sleeve shaft 8461 during the sliding process, thereby achieving stable power transmission.

[0040] Working principle: By starting the motor 72 to drive the impeller shaft of the pump body 71 to rotate, the water in the water tank 73 is introduced into the pump body 71 by the water inlet pipe 74, and then the water is introduced into the water hose 6 through the water outlet pipe 75, so that the water hose 64 introduces the water into the diversion pipe 62, and then sprays out through each nozzle 63 and sprays toward the bridge to realize the spraying work;

[0041] When the motor 72 is started, the pulley 2 8484 drives the pulley 1 8483 to rotate synchronously, so that the small gear 8482 drives the large gear 8481, so that the elastic telescopic shaft 846 rotates, so that the docking block 2 847 rotates synchronously, and the control cylinder 842 drives the mounting plate 843 to move, so that the spline sleeve 844 slides along the spline 841, so that the docking block 1 845 makes the docking block 2 847 cooperate, so that the docking block 2 847 drives the docking block 1 845 to rotate, so that the spline sleeve 844 drives the spline 841 to rotate synchronously, so that the bevel gear 2 83 rotates, which makes the bevel gear 1 81 drive the reciprocating screw 9 to rotate, so that the movable seat 4 reciprocates in the vertical direction, which makes the travel gear 671 move in the vertical direction. When the traveling gear 671 is meshed with one of the racks 672, the traveling gear 671 rotates, and at this moment, the torsion spring 673 is contracted to accumulate potential energy. When the traveling gear 671 is disengaged from the rack 672, the torsion spring 673 releases the potential energy to make the traveling gear 671 rotate in the opposite direction. In this cycle, the traveling gear 671 can rotate back and forth, which makes the worm 66 rotate back and forth, and the worm wheel 65 drives the rotating seat 61 to rotate back and forth, which makes the rotating seat 61 drive the diverter pipe 62 to swing back and forth, which can greatly increase the lateral spraying range of the nozzle 63, so that fewer nozzles 63 can be set to achieve the purpose of a larger spraying range, thereby reducing the manufacturing cost, and can also reduce the movement frequency of the base 1 to reduce the workload of the staff.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A highway bridge maintenance spray device, comprising a base (1), one end of the top of the base (1) being fixedly connected to a mounting frame (3), characterized in that: A reciprocating screw rod (9) is rotatably connected to the inner side of the mounting frame (3), a movable seat (4) is threadedly connected to the reciprocating screw rod (9), a guide groove (5) slidably connected to the movable seat (4) is provided on one side of the mounting frame (3), a spray mechanism (6) is provided at one end of the movable seat (4) away from the reciprocating screw rod (9), the spray mechanism (6) comprises a rotating seat (61), one end of the rotating seat (61) is rotatably connected to the movable seat (4), the other end of the rotating seat (61) is fixedly connected to a shunt pipe (62), and the outer side of the shunt pipe (62) is fixedly connected to a plurality of spray heads (63) equidistantly distributed in a vertical direction, The inner side of the movable seat (4) is rotatably connected to a worm wheel (65) coaxially fixed with the rotating seat (61); one end of the inner side of the movable seat (4) is rotatably connected to a worm (66) meshing with the worm wheel (65); one end of the worm (66) is provided with a linkage member (67) for driving the worm (66) to reciprocate by cooperating with the vertical movement of the movable seat (4); the top of the diversion pipe (62) is fixedly connected to a water guide hose (64); the inlet end of the water guide hose (64) is provided with a water supply mechanism (7) for supplying water; and the bottom end of the reciprocating screw (9) is provided with a transmission mechanism (8) for driving the reciprocating screw (9) to rotate.

2. A highway bridge maintenance spraying device according to claim 1, characterized in that: The four corners of the bottom of the base (1) are rotatably connected to running wheels (2).

3. A highway bridge maintenance spraying device according to claim 1, characterized in that: The linkage member (67) comprises a travel gear (671) fixedly connected to the end of the worm (66); a plurality of racks (672) equidistantly distributed in the vertical direction are fixedly connected to the inner side of the mounting frame (3); the travel gear (671) meshes with any one of the racks (672) by cooperating with the vertical movement of the movable seat (4); a torsion spring (673) is sleeved on the worm (66); one end of the torsion spring (673) is welded to the movable seat (4), and the other end of the torsion spring (673) is welded to the travel gear (671).

4. A highway bridge maintenance spraying device according to claim 3, characterized in that: The water supply mechanism (7) comprises a pump body (71), the pump body (71) is fixedly connected to a mounting frame (3), a motor (72) is fixedly mounted on one end of the inner side of the mounting frame (3), the output shaft of the motor (72) is fixedly connected to the impeller shaft of the pump body (71), the inlet end of the pump body (71) is fixedly connected to a water inlet pipe (74), the inlet end of the water inlet pipe (74) is fixedly connected to a water tank (73), the water tank (73) is fixedly connected to the top of the base (1), the outlet end of the pump body (71) is fixedly connected to a water outlet pipe (75), the outlet end of the water outlet pipe (75) is connected to the inlet end of the water guide hose (64).

5. A highway bridge maintenance spraying device according to claim 4, characterized in that: The transmission mechanism (8) comprises a bevel gear 1 (81) fixedly connected to the bottom end of the reciprocating screw rod (9); the bottom end of the inner side of the mounting frame (3) is rotatably connected to a rotating shaft (82); one end of the rotating shaft (82) is fixedly connected to a bevel gear 2 (83) meshing with the bevel gear 1 (81); and the other end of the rotating shaft (82) is provided with a docking assembly (84) for driving the rotating shaft (82) to rotate.

6. A highway bridge maintenance spraying device according to claim 5, characterized in that: The docking assembly (84) comprises a spline (841) fixedly connected to the end of the rotating shaft (82); a cylinder (842) is fixedly connected to the inner side of the mounting frame (3); an output end of the cylinder (842) is fixedly connected to a mounting plate (843); one end of the mounting plate (843) is rotatably connected to a spline sleeve (844) that passes through the mounting plate (843); the spline sleeve (844) is sleeved on the spline (841) and meshed with the spline (841); one end of the spline sleeve (844) is A docking block (845) is fixedly connected thereto, and the bottom end of the inner side of the mounting frame (3) is rotatably connected to an elastic telescopic shaft (846), one end of the elastic telescopic shaft (846) is fixedly connected to a docking block (847), the docking block (845) is slidably matched with the docking block (845) by translation of a matching spline shaft sleeve (844), and the other end of the elastic telescopic shaft (846) is provided with a speed change component (848) that drives the elastic telescopic shaft (846) to rotate by starting the matching motor (72).

7. A highway bridge maintenance spraying device according to claim 6, characterized in that: The speed changing member (848) comprises a large gear (8481) fixedly connected to one end of the elastic telescopic shaft (846); a small gear (8482) is rotatably connected to the inner side of the mounting frame (3); the small gear (8482) is meshed with the large gear (8481); the small gear (8482) is coaxially fixedly connected to a pulley 1 (8483); the output shaft of the motor (72) is fixedly connected to a pulley 2 (8484); the pulley 2 (8484) is connected to the pulley 1 (8483) via a belt drive.

8. A highway bridge maintenance spraying device according to claim 7, characterized in that: The gear ratio between the small gear (8482) and the large gear (8481) is 1:

30.

9. A highway bridge maintenance spraying device according to claim 7, characterized in that: The elastic telescopic shaft (846) includes a sleeve shaft (8461) rotatably connected to the inner side of the mounting frame (3); one end of the sleeve shaft (8461) is slidably connected to an insertion shaft (8462); one end of the insertion shaft (8462) away from the sleeve shaft (8461) is fixedly connected to a docking block 2 (847); the outer side of the insertion shaft (8462) is fixedly connected to a limit strip (8463); the limit strip (8463) is slidably connected to the inner wall of the sleeve shaft (8461); the other end of the sleeve shaft (8461) is fixedly connected to a large gear (8481); a spring (8464) is sleeved on the inner side of the sleeve shaft (8461); one end of the spring (8464) contacts the insertion shaft (8462); and the other end of the spring (8464) contacts the inner wall of the sleeve shaft (8461).

10. A highway bridge maintenance spraying device according to claim 9, characterized in that: The inner wall of the sleeve shaft (8461) is provided with a limiting groove (8465) matching the limiting strip (8463), and the limiting strip (8463) can slide along the limiting groove (8465).

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