CN221518247U - Box girder end spray curing device - Google Patents

Abstract

The utility model relates to the technical field of box girder maintenance, and discloses a box girder end spray maintenance device which is used for spraying the end face of a box girder body and comprises a travelling mechanism and a spraying mechanism, wherein the travelling mechanism comprises a bracket guide rail and a driving device, and the spraying mechanism comprises a water supply pipe; the support guide rail is arranged at the top of the box girder body, the length of the support guide rail is the same as the width of the box girder body, the driving device is arranged on the support guide rail, and the driving device drives the spraying mechanism to reciprocate along the support guide rail; the water supply pipe is communicated with a water source, a plurality of nozzles are arranged on one side of the water supply pipe, facing the box girder body, and are distributed at intervals along the length direction of the water supply pipe, and the length of the water supply pipe is identical to the height of the box girder body so that the nozzles on the water supply pipe can spray the maintenance water onto the whole end face of the box girder body. The utility model can uniformly spray the end part of the box girder, prevent the end part of the box girder from cracking, and has the advantages of saving manpower and water resources, high spraying efficiency and the like.

Description

Box girder end spray curing device

Technical Field

The utility model relates to the field of box girder maintenance, in particular to a box girder end spray maintenance device.

Background

The construction and development of the Chinese high-speed rail rapidly advances, and the world is stable for over ten years, so that a plurality of world records are created. The railway is built rapidly, the large-area use of the box girder is not needed, and the quality of the box girder is directly related to the engineering entity quality of the box girder. The box Liang Zaizhi Liang Changna must be regularly sprayed and maintained after casting production, so that the moisture and humidity on the surface of the box girder are ensured to be in a specified range, and surface cracks, through cracks and the like of the box girder are avoided, thereby influencing the service life of the box girder.

The box girder is manually sprayed with water for maintenance, which is the most traditional and convenient maintenance method, but the quality of the manually sprayed water for maintenance is uneven, the maintenance effect is poor easily, and maintenance workers need to work regularly, the labor intensity is high, and the labor force is more. Therefore, some maintenance equipment capable of automatically spraying the box girder appears, for example, chinese patent with the bulletin number of CN219586527U is entitled "a high-speed box girder automatic spraying maintenance device", which discloses a high-speed box girder automatic spraying maintenance device, comprising a girder body, wherein a prefabricated pedestal is fixedly connected to the bottom of the girder body, and spraying mechanisms are symmetrically arranged at the top of the prefabricated pedestal.

The automatic spraying maintenance device for the high-speed box girder can perform automatic spraying maintenance without workers, can realize uniform spraying of the top and the side edges of the box girder, and improves maintenance quality. However, in practical use, it is found that the end of the box girder cannot be effectively sprayed, and the end of the box girder still needs to be manually sprayed and maintained, so that improvement is needed.

Disclosure of utility model

Aiming at the problems existing in the prior art: the utility model aims to provide a box girder end spray maintenance device which can uniformly spray the end of a box girder to prevent cracks from occurring at the end of the box girder and has the advantages of saving manpower and water resources, being high in spray efficiency and the like, and being convenient for large-area popularization and application.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

The box girder end spray maintenance device is used for spraying the end face of a box girder body and comprises a travelling mechanism and a spray mechanism, wherein the travelling mechanism comprises a bracket guide rail and a driving device, and the spray mechanism comprises a water supply pipe; the support guide rail is arranged at the top of the box girder body, the length of the support guide rail is the same as the width of the box girder body, the driving device is arranged on the support guide rail, and the driving device drives the spraying mechanism to reciprocate along the support guide rail; the water supply pipe is communicated with a water source, a plurality of nozzles are arranged on one side, facing the box girder body, of the water supply pipe, the nozzles are distributed at intervals along the length direction of the water supply pipe, and the length of the water supply pipe is identical to the height of the box girder body, so that the nozzles on the water supply pipe can spray the nutrient water onto the whole end face of the box girder body.

The utility model is further provided with: the driving device comprises a mobile motor and an electric cabinet, wherein the mobile motor is used for driving the spraying mechanism to reciprocate along the support guide rail, and the electric cabinet supplies power for the mobile motor and automatically controls the starting and stopping of the mobile motor.

The utility model is further provided with: the electric cabinet is characterized in that a weather detection module and a communication module are further arranged in the electric cabinet, the weather detection module is used for detecting the ambient temperature and the ambient humidity near the collecting box girder body, and the communication module is used for information transmission between the electric cabinet and the control console so as to realize remote control.

The utility model is further provided with: the spraying mechanism further comprises a supporting frame for supporting the water supply pipe, the supporting frame is fixedly connected with the driving device, and the supporting frame is fixedly connected with the water supply pipe.

The utility model is further provided with: the box girder body comprises a first horizontal section, a second horizontal section and two inclined sections, the water supply pipe comprises a first water spray pipe, a second water spray pipe and a third water spray pipe, the first water spray pipe is used for spraying the first horizontal section, the second water spray pipe is used for spraying the second horizontal section, and the third water spray pipe is used for spraying the two inclined sections.

The utility model is further provided with: the driving device further comprises a limit switch which is arranged on the support guide rail and electrically connected with the electric cabinet, electromagnetic valves which are electrically connected with the electric cabinet are arranged on the first water spraying pipe, the second water spraying pipe and the third water spraying pipe, the limit switch comprises a first limit switch and a second limit switch, and the first limit switch and the second limit switch are matched with the electric cabinet to control the electromagnetic valves on the second water spraying pipe to be opened or closed.

The utility model is further provided with: the limit switch further comprises a third limit switch, a fourth limit switch, a fifth limit switch and a sixth limit switch, the inclined section comprises a first inclined section and a second inclined section, the third limit switch and the fourth limit switch are matched with the electric cabinet to control the third spray pipe to spray the first inclined section, and the fifth limit switch and the sixth limit switch are matched with the electric cabinet to control the third spray pipe to spray the second inclined section.

The utility model is further provided with: the spraying mechanism further comprises a rotating assembly, the rotating assembly comprises a fixed shaft and a driving box body, the fixed shaft is fixed at the middle position of the third water spraying pipe, the driving box body is fixedly connected with the supporting frame, and the driving box body drives the fixed shaft to rotate along the axis of the fixed shaft.

The utility model is further provided with: the driving box body is internally provided with a stepping motor electrically connected with the electric control box, and the electric control box supplies power to the stepping motor and automatically controls the rotation of the stepping motor.

In summary, the beneficial effects achieved by the utility model are as follows:

(1) The support guide rail positioned at the top of the box girder body provides a support and a moving rail for the driving device and the water supply pipe, the driving device drives the water supply pipe to reciprocate on the support guide rail, and in the reciprocating movement process of the water supply pipe, a plurality of nozzles on the water supply pipe continuously spray curing water towards the end face of the box girder body, so that the box girder body is cured, cracks at the end part of the box girder are avoided, labor is saved, and spraying efficiency is improved;

(2) The electric cabinet automatically controls the start and stop of the mobile motor in the driving device, thereby realizing automatic spraying. And the weather detection module can monitor the ambient temperature and the humidity near the box girder body at any time, and the electric cabinet realizes automatic spraying according to the monitored information. In addition, the console can realize remote control through the communication module;

(3) Splitting a water supply pipe into a first water spray pipe, a second water spray pipe and a third water spray pipe, spraying a first horizontal section by the first water spray pipe according to the unique structure of the box girder body, spraying a second horizontal section by the second water spray pipe, spraying a first inclined section and a second inclined section by the third water spray pipe, controlling the water spraying time of the first water spray pipe, the second water spray pipe and the third water spray pipe through a limit switch and an electromagnetic valve, effectively reducing the consumption of curing water on the basis of ensuring the curing effect of the box girder body, and saving water resources;

(4) The third water spraying pipe is driven to rotate along the axis of the fixed shaft within a certain angle range through the rotating assembly, so that the length direction of the third water spraying pipe in a water spraying state is kept consistent with that of the first inclined section or the second inclined section, and the spraying effect on the first inclined section and the second inclined section is improved on the basis of further saving water resources.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the specification will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to these drawings for those of ordinary skill in the art.

FIG. 1 is a schematic view of a box girder according to the present utility model;

FIG. 2 is a front view of a box girder end spray maintenance device according to an embodiment of the present utility model;

FIG. 3 is a side view of a box girder end spray maintenance device according to an embodiment of the present utility model;

FIG. 4 is a front view of a box girder end spray maintenance device in a second embodiment of the present utility model;

FIG. 5 is a front view of a spray mechanism in a second embodiment of the present utility model;

FIG. 6 is a side view of a third sprinkler tube and swivel assembly according to a second embodiment of the present utility model.

In the figure: 1. a box girder body; 11. a first horizontal segment; 12. a second horizontal segment; 13. a first sloped section; 14. a second sloped section; 2. a walking mechanism; 21. a bracket guide rail; 22. a driving device; 221. a moving motor; 222. an electric control box; 223. a first limit switch; 224. a second limit switch; 225. a third limit switch; 226. a fourth limit switch; 227. a fifth limit switch; 228. a sixth limit switch; 3. a spraying mechanism; 31. a support frame; 32. a water supply pipe; 321. a first water jet pipe; 322. a second water jet pipe; 323. a third water jet pipe; 324. a nozzle; 33. a rotating assembly; 331. a fixed shaft; 332. the box is driven.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. For ease of description, the terms "vertical," "horizontal," "left," "right," "upper," "lower," "inner," "outer," "bottom," and the like as used herein refer to an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the utility model and to simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus are not to be construed as limiting the utility model.

The embodiments of the present utility model and the features of the embodiments may be combined with each other without any conflict. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

As shown in figures 1-3, the box girder end spray maintenance device is used for spraying the end face of a box girder body 1 and comprises a travelling mechanism 2 and a spraying mechanism 3.

The travelling mechanism 2 comprises a bracket guide rail 21 and a driving device 22, and the travelling mechanism 2 is used for driving the spraying mechanism 3 to reciprocate along the width direction of the box girder body 1 (the length direction of the box girder body 1 is the a direction in the figure 1, the width direction of the box girder body 1 is the b direction in the figure 2, and meanwhile, the spraying direction of the spraying mechanism 3 to the box girder body 1 in the utility model).

The bracket guide rail 21 is a horizontally arranged rectangular frame structure, and the length of the bracket guide rail is the same as the width of the box girder body 1. The bottom of the support guide rail 21 is provided with a plurality of groups of support legs at equal intervals along the length direction of the support guide rail 21, and the support legs are positioned between the top of the box girder body 1 and the bottom of the support guide rail 21.

The rack rail 21 is fixed on the top surface of the box girder body 1 so as to provide a stable support and a moving track for the driving device 22 and the shower mechanism 3, and in this embodiment, the upper surface of the rack rail 21 is provided with a rack extending in the length direction thereof.

The driving device 22 is arranged on the support rail 21, and the driving device 22 comprises a moving motor 221 and an electric cabinet 222, wherein the moving motor 221 is used for driving the spraying mechanism 3 to reciprocate along the support rail 21. Specifically, the output shaft of the movement motor 221 transmits power to a gear engaged with a rack gear on the rack rail 21 through a decelerator, thereby generating a reaction force acting on the driving device 22, pushing the driving device 22 to move on the rack rail 21.

An air switch, a contactor and a relay are arranged in the electric cabinet 222 to supply power for the mobile motor 221. And, an industrial controller, such as a PLC (programmable logic controller), is further disposed in the electric cabinet 222, and can automatically control the starting and stopping of the mobile motor 221 according to the embedded control logic. It is noted that the controller of the present utility model is an existing device and the present utility model does not involve improvements to the control logic or algorithm program internal to the controller.

The electric cabinet 222 is further provided with a weather detection module and a communication module, which are all mature devices in the prior art, and are not described in detail herein. The weather detection module is used for detecting the ambient temperature and the humidity near the collecting box girder body 1, and the communication module is used for information transmission between the electric cabinet 222 and the control console so as to realize remote control of the spraying maintenance device. The electric cabinet 222 can control spraying to the box girder body 1 according to the control logic of the controller and the meteorological parameters measured by the meteorological detection module, and can also receive instructions of the control console through the communication module.

The shower mechanism 3 includes a water supply pipe 32 and a support frame 31 for supporting the water supply pipe 32. One end of the supporting frame 31 is fixedly connected with the driving device 22, the other end of the supporting frame 31 is fixedly connected with the water supply pipe 32, the fixing mode can realize detachable and adjustable connection and fixation through the cooperation of bolts and hoops, and the rigid connection can also be realized by directly adopting a welding fixing mode. The arrangement of the supporting frame 31 can effectively improve the structural strength of the spraying mechanism 3 which is arranged in the air.

The water supply pipe 32 is vertically disposed at one side of the end face of the box girder body 1, and the length of the water supply pipe 32 is the same as the height of the box girder body 1. The water supply pipe 32 is provided with a plurality of nozzles 324 distributed at equal intervals along the length direction of the water supply pipe 32 on one side facing the box girder body 1.

The water supply pipe 32 is also provided with an electromagnetic valve electrically connected with the electric cabinet 222, when the water supply pipe 32 is connected with a water source, the motor 221 is moved under the control of the electric cabinet 222 to drive the water supply pipe 32 to reciprocate along the support guide rail 21, so that maintenance water can be continuously sprayed onto the whole end face of the box girder body 1 through the spray nozzle 324 on the water supply pipe 32.

The implementation principle of the embodiment is as follows:

When the end part of the box girder body 1 needs to be sprayed or a spraying instruction is received, the electric cabinet 222 controls the electromagnetic valve on the water supply pipe 32 to be opened, and simultaneously controls the movable motor 221 to be electrified to work, and the movable motor 221 drives the water supply pipe 32 to move along the support guide rail 21 at the top of the box girder body 1 through the support frame 31 after outputting power. In the process of moving the water supply pipe 32, the nozzle 324 sprays curing water onto the end face of the box girder body 1 uniformly to cure the box girder body 1, so that cracks at the end part of the box girder body 1 are prevented, manpower is saved, and meanwhile, the spraying efficiency is improved.

Example two

As shown in fig. 4-6, in the case beam end spray maintenance device disclosed by the utility model, unlike the first embodiment, the water supply pipe 32 comprises a first water spray pipe 321, a second water spray pipe 322 and a third water spray pipe 323, which correspond to different parts of the spray case beam body 1.

Specifically, the end face of the box girder body 1 is composed of a first horizontal section 11, a second horizontal section 12, a first inclined section 13, and a second inclined section 14. The first horizontal section 11 is located at the top of the box girder body 1, the second horizontal section 12 is located at the bottom of the box girder body 1, and the first inclined section 13 and the second inclined section 14 are located between the first horizontal section 11 and the second horizontal section 12.

The first spray pipe 321 is used for spraying the first horizontal section 11, the second spray pipe 322 is used for spraying the second horizontal section 12, and the third spray pipe 323 is used for spraying the first inclined section 13 and the second inclined section 14. The first water spraying pipe 321, the second water spraying pipe 322 and the third water spraying pipe 323 are respectively provided with an electromagnetic valve electrically connected with the electric control box 222, and the electric control box 222 can flexibly control the on-off of the electromagnetic valve on any water spraying pipe.

The driving device 22 further comprises a plurality of limit switches which are arranged on the bracket guide rail 21 and are electrically connected with the electric cabinet 222. Specifically, the length of the first horizontal segment 11 is the same as the length of the support rail 21, so the electric cabinet 222 controls the solenoid valve on the first water spray pipe 321 to be in an open state all the time during the movement of the moving motor 221, thereby spraying the complete first horizontal segment 11.

The length of the second horizontal segment 12 is smaller than that of the support rail 21, and the electromagnetic valve on the second water spraying pipe 322 can spray the complete second horizontal segment 12 without being in an open state all the time during the moving process of the moving motor 221. In order to save water sources, the limit switch comprises a first limit switch 223 and a second limit switch 224, and the first limit switch 223 and the second limit switch 224 are matched with the electric cabinet 222 to control the electromagnetic valve on the second water spray pipe 322 to be opened or closed.

The first limit switch 223 and the second limit switch 224 are respectively arranged at the positions corresponding to the two ends of the length of the second horizontal section 12 on the support guide rail 21, so that when the mobile motor 221 moves to touch the first limit switch 223, the electromagnetic valve on the second water spraying pipe 322 is opened to start spraying the second horizontal section 12; when the moving motor 221 touches the second limit switch 224, the electromagnetic valve on the second water spraying pipe 322 is closed, and the spraying of the second horizontal section 12 is finished and stopped to save water resources.

Similarly, the solenoid valve on the third spray pipe 323 does not need to be opened all the time during the movement of the moving motor 221, so that the first inclined section 13 and the second inclined section 14 can be completely sprayed.

The limit switch further comprises a third limit switch 225, a fourth limit switch 226, a fifth limit switch 227 and a sixth limit switch 228, wherein the third limit switch 225 and the fourth limit switch 226 are matched with the electric cabinet 222 to control the spraying of the third spray pipe 323 to the first inclined section 13; the fifth limit switch 227 and the sixth limit switch 228 cooperate with the electric cabinet 222 to control the spraying of the third spray pipe 323 to the second inclined section 14.

Specifically, when the moving motor 221 touches the third limit switch 225, the electromagnetic valve on the third spray pipe 323 is opened to start spraying the first inclined section 13; when the moving motor 221 touches the fourth limit switch 226 in a moving way, the electromagnetic valve on the third spray pipe 323 is closed, and the spraying of the first inclined section 13 is completed and stopped; when the moving motor 221 touches the fifth limit switch 227, the electromagnetic valve on the third spray pipe 323 is opened to start spraying the second inclined section 14; when the moving motor 221 touches the sixth limit switch 228, the solenoid valve on the third spray pipe 323 is closed, and spraying of the second inclined section 14 is completed and stopped.

In this embodiment, the limit switch and the electromagnetic valve are used to control the water spraying time of the first water spraying pipe 321, the second water spraying pipe 322 and the third water spraying pipe 323, so that the consumption of curing water is effectively reduced and the consumption of water resources is greatly reduced on the basis of ensuring the curing effect of the box girder body 1.

In particular, since the first inclined section 13 and the second inclined section 14 are inclined, and the angles of inclination of the first inclined section 13 and the second inclined section 14 are different, in order to further save water resources, and improve the spraying effect on the first inclined section 13 and the second inclined section 14, a rotating assembly 33 for driving the third spray pipe 323 to rotate within a certain range is added in the spraying mechanism 3.

The rotating assembly 33 includes a fixed shaft 331 and a driving housing 332, one end of the fixed shaft 331 is fixed to a middle position in a length direction of the third water spray pipe 323, and the other end of the fixed shaft 331 is connected to the driving housing 332.

The driving box 332 is fixedly connected with the supporting frame 31, a stepping motor electrically connected with the electric control box 222 is arranged in the driving box 332, and the electric control box 222 supplies power to the stepping motor and automatically controls the rotation of the stepping motor according to a preset control program. So that the driving housing 332 can drive the fixed shaft 331 to rotate a certain angle along the axis of the fixed shaft 331 under the control of the electric cabinet 222.

Specifically: when the moving motor 221 touches the third limit switch 225 in a moving way, the electromagnetic valve on the third water spraying pipe 323 is opened, and meanwhile, the stepping motor in the box 332 is driven to rotate by a preset angle, so that the length direction of the third water spraying pipe 323 is consistent with the inclination direction of the first inclined section 13, and the first inclined section 13 starts to be sprayed at the moment;

When the moving motor 221 touches the fourth limit switch 226 in a moving way, the electromagnetic valve on the third spray pipe 323 is closed, and meanwhile, the stepping motor in the box 332 is driven to rotate by the same angle in the opposite direction, so that the third spray pipe 323 is reset, and the spraying on the first inclined section 13 is completed and stopped;

When the moving motor 221 touches the fifth limit switch 227 in a moving way, the electromagnetic valve on the third water spraying pipe 323 is opened, and meanwhile, the stepping motor in the box 332 is driven to rotate by a preset angle, so that the length direction of the third water spraying pipe 323 is consistent with the inclination direction of the second inclined section 14, and the second inclined section 14 starts to be sprayed at the moment;

When the moving motor 221 touches the sixth limit switch 228, the electromagnetic valve on the third spray pipe 323 is closed, and meanwhile, the stepping motor in the box 332 is driven to rotate by the same angle in the opposite direction, so that the third spray pipe 323 is reset, and spraying on the second inclined section 14 is completed and stopped.

While preferred embodiments of the present utility model have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the utility model. It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (9)

1. The box girder end spray maintenance device is used for spraying the end face of a box girder body (1) and is characterized by comprising a travelling mechanism (2) and a spray mechanism (3), wherein the travelling mechanism (2) comprises a bracket guide rail (21) and a driving device (22), and the spray mechanism (3) comprises a water supply pipe (32);

The support guide rail (21) is arranged at the top of the box girder body (1), the length of the support guide rail (21) is the same as the width of the box girder body (1), the driving device (22) is arranged on the support guide rail (21), and the driving device (22) drives the spraying mechanism (3) to reciprocate along the support guide rail (21);

The water supply pipe (32) is communicated with a water source, a plurality of nozzles (324) are arranged on one side, facing the box girder body (1), of the water supply pipe (32), the nozzles (324) are distributed at intervals along the length direction of the water supply pipe (32), and the length of the water supply pipe (32) is identical to the height of the box girder body (1) so that the nozzles (324) on the water supply pipe (32) can spray curing water onto the whole end face of the box girder body (1).

2. The box girder end spray maintenance device according to claim 1, wherein the driving device (22) comprises a mobile motor (221) and an electric cabinet (222), the mobile motor (221) is used for driving the spray mechanism (3) to reciprocate along the support guide rail (21), and the electric cabinet (222) supplies power for the mobile motor (221) and automatically controls the starting and stopping of the mobile motor (221).

3. The box girder end spray maintenance device according to claim 2, wherein a weather detection module and a communication module are further arranged in the electric control box (222), the weather detection module is used for detecting the ambient temperature and the humidity near the collecting box girder body (1), and the communication module is used for information transmission between the electric control box (222) and the control console so as to realize remote control.

4. The spray maintenance device for the end of the box girder according to claim 1, wherein the spray mechanism (3) further comprises a support frame (31) for supporting the water supply pipe (32), the support frame (31) is fixedly connected with the driving device (22), and the support frame (31) is fixedly connected with the water supply pipe (32).

5. The box girder end spray maintenance device according to any one of claims 1 to 4, wherein the box girder body (1) comprises a first horizontal section (11), a second horizontal section (12) and two inclined sections, the water supply pipe (32) comprises a first spray pipe (321), a second spray pipe (322) and a third spray pipe (323), the first spray pipe (321) is used for spraying the first horizontal section (11), the second spray pipe (322) is used for spraying the second horizontal section (12), and the third spray pipe (323) is used for spraying the two inclined sections.

6. The box girder end spray maintenance device according to claim 5, wherein the driving device (22) further comprises a limit switch which is arranged on the support guide rail (21) and is electrically connected with the electric cabinet (222), electromagnetic valves which are electrically connected with the electric cabinet (222) are arranged on the first water spraying pipe (321), the second water spraying pipe (322) and the third water spraying pipe (323), the limit switch comprises a first limit switch (223) and a second limit switch (224), and the first limit switch (223) and the second limit switch (224) are matched with the electric cabinet (222) to control the electromagnetic valves on the second water spraying pipe (322) to be opened or closed.

7. The box girder end spray maintenance device according to claim 6, wherein the limit switch further comprises a third limit switch (225), a fourth limit switch (226), a fifth limit switch (227) and a sixth limit switch (228), the inclined section comprises a first inclined section (13) and a second inclined section (14), the third limit switch (225) and the fourth limit switch (226) cooperate with the electric cabinet (222) to control the spraying of the third spray pipe (323) to the first inclined section (13), and the fifth limit switch (227) and the sixth limit switch (228) cooperate with the electric cabinet (222) to control the spraying of the third spray pipe (323) to the second inclined section (14).

8. The spray maintenance device for the end of the box girder according to claim 7, wherein the spray mechanism (3) further comprises a rotating assembly (33), the rotating assembly (33) comprises a fixed shaft (331) fixed at the middle position of the third spray pipe (323) and a driving box body (332), the driving box body (332) is fixedly connected with the supporting frame (31), and the driving box body (332) drives the fixed shaft (331) to rotate along the axis of the fixed shaft (331).

9. The spray maintenance device for the end of the box girder according to claim 8, wherein a stepping motor electrically connected with an electric cabinet (222) is arranged in the driving box body (332), and the electric cabinet (222) supplies power to the stepping motor and automatically controls the rotation of the stepping motor.