Spray disc sealing structure of wall-climbing robot

Abstract

The utility model discloses a spraying disc sealing structure of a wall-climbing robot, which relates to the field of wall-climbing robots and comprises a shell, a driving mechanism, a rotating group, a spraying rod group and a sealing mechanism, the driving mechanism and the rotating group are respectively mounted on the top surface of the shell, and the output end of the rotating group extends downwards and is rotationally connected with the spraying rod group in an inner cavity of the shell; a water retaining shell is arranged in the shell above the spray rod group, a labyrinth structure, a buffer cavity and an antifriction cavity are sequentially arranged on the inner wall of a sealing cavity in the water retaining shell from bottom to top, and water retaining and slag retaining are achieved through a multi-stage sealing structure jointly formed by combined sealing bodies in the labyrinth structure, the buffer cavity and the antifriction cavity during use. According to the wall-climbing robot, a multi-stage sealing mode is adopted, waste residues, waste water and the like are effectively blocked, a transmission mechanism is effectively protected, smooth operation of the driving spraying disc is guaranteed, and the working stability and reliability of the wall-climbing robot are further improved.

Description

Technical Field

[0001] The utility model belongs to the field of wall-climbing robots, and in particular relates to a spray disc sealing structure of a wall-climbing robot. Background Art

[0002] The wall-climbing robot that integrates ultra-high pressure water jet technology is a new type of wall-climbing robot that combines ultra-high pressure water jet technology. It can crawl and move freely on curved facades, such as the outer surfaces of large ships and storage tanks, and clean, remove paint and rust on the metal surface of the tank by spraying ultra-high pressure water. It can replace the traditional sandblasting and rust removal working method to achieve efficient and environmentally friendly operations.

[0003] However, the wastewater generated during the operation contains small particles, which often enter the meshing part of the transmission gear as the operation progresses, causing the transmission mechanism of the drive spray disc to frequently get stuck, affecting the operation of the drive spray disc. The most common solution to this problem is to set a water baffle between the gear and the nozzle. Its structure is as follows: Figure 1 shown.

[0004] However, when the water baffle is actually working, the waste residue and waste water generated by the operation will bypass the water baffle and flow from the gap between the water baffle and the housing to the gear meshing part, such as Figure 1 The arrow position shown in the figure will still cause the drive spray disc to get stuck, and still affect the operation of the drive spray disc.

[0005] Based on the above problems, the utility model proposes a new spray disc sealing structure, which adopts a multi-stage sealing method to effectively block waste residue, waste water, etc., to effectively protect the transmission mechanism, to ensure the smooth operation of the driving spray disc, and to further improve the stability and reliability of the wall-climbing robot. Utility Model Content

[0006] Aiming at the defects and problems that the spray disc driving mechanism of the traditional wall-climbing robot cannot effectively block the waste water and waste residue in the working process, which easily leads to the frequent jamming of the driving mechanism, the utility model provides a spray disc sealing structure of the wall-climbing robot.

[0007] The solution adopted by the utility model to solve its technical problems is: a spray disc sealing structure of a wall-climbing robot, comprising a shell, a driving mechanism, a rotating group, a spray rod group and a sealing mechanism, wherein the driving mechanism and the rotating group are respectively mounted on the top surface of the shell, and the output end of the rotating group extends downward and is rotatably connected to the spray rod group in the inner cavity of the shell; a sealing mechanism is arranged in the shell above the spray rod group, and the sealing mechanism comprises a water retaining shell, the output end of the driving mechanism extends downward into the water retaining shell and is connected with a main gear, a slave gear is mounted on the output shaft of the rotating group, and the main gear and the slave gear are meshed for transmission; and the slave gear is located in the columnar sealing cavity of the water retaining shell; the inner wall of the sealing cavity is provided with a labyrinth structure, a buffer cavity and a friction reduction cavity in sequence from bottom to top, and when in use, a multi-stage sealing structure formed by the combined sealing bodies in the labyrinth structure, the buffer cavity and the friction reduction cavity realizes water and slag retaining.

[0008] As a preferred technical solution of the utility model, the rotating group includes a rotating body and a mounting seat, the mounting seat is also provided with a set screw, and the rotating body is matched and sleeved inside the mounting seat.

[0009] As a preferred technical solution of the utility model, a matching sealing gasket is provided on the top surface of the water retaining shell to be fixedly installed with the top surface of the shell body, and a slave gear accommodating portion and a master gear accommodating portion are provided in the water retaining shell.

[0010] As a preferred technical solution of the utility model, a sealing cavity with a columnar structure is also provided in the slave gear accommodating portion. The labyrinth structure of the sealing cavity is located near the bottom opening of the sealing cavity. The volume of the labyrinth structure is smaller than the volume of the buffer cavity and the friction reduction cavity.

[0011] As a preferred technical solution of the utility model, the combined sealing body is composed of an external O-ring and an internal sealing ring. The sealing ring is sleeved outside the slave gear and can fit tightly against the shaft of the slave gear without affecting the rotation of the gear.

[0012] As a preferred technical solution of the utility model, the spray boom group includes a spray boom body, and spray boom arms are evenly distributed along the circumference of the spray boom body, and each spray boom arm is respectively provided with a plurality of spray heads.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model provides a spray disc sealing structure for a wall-climbing robot, which adopts a multi-stage sealing method to effectively block waste residues, waste water, etc., to effectively protect the transmission mechanism, to ensure the smooth operation of the driving spray disc, and to further improve the working stability and reliability of the wall-climbing robot.

[0015] Specifically, the present invention uses a reduction motor as the power source of the entire spray disc, which can make the rotation speed controllable, and thus the operation quality can also be controlled; the multi-stage sealing structure formed by the combined sealing bodies in the maze structure, the buffer chamber and the friction reduction chamber can effectively prevent wastewater and waste residue from invading the inside of the spray disc, thereby protecting the normal operation of the driving mechanism and the rotating group, keeping the inside of the spray disc clean, and greatly reducing the risk of the driving gear getting stuck; the present invention has a small sealing structure that occupies a small space, is easy to maintain and replace, has a compact axial structure, a light structural mass, and a good sealing effect, which further improves the working efficiency and stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional structural schematic diagram of the prior art;

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure after removing the shell;

[0019] Figure 4 It is a schematic diagram of the structure installed inside the water retaining shell;

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the water retaining shell;

[0021] Figure 6 It is a schematic diagram of the cross-sectional structure of the water retaining shell;

[0022] Figure 7 It is a cross-sectional structural schematic diagram of the utility model;

[0023] Figure 8 for Figure 7 A schematic diagram of the enlarged structure at A in the middle;

[0024] Fig. 9 for Figure 7 Schematic diagram of the enlarged structure at point B in the middle.

[0025] In the figure: 1-reduction motor, 2-housing, 3-rotation group, 4-water baffle, 5-spray rod group, 6-gear group, 7-spray rod body, 8-spray head, 9-mounting seat, 10-rotating body, 11-fastening screw, 12-water baffle shell, 13-main gear, 14-slave gear, 15-slave gear accommodating part, 16-main gear accommodating part, 17-sealing chamber, 18-friction reduction chamber, 19-buffer chamber, 20-labyrinth structure, 21-O-ring, 22-sealing ring, 23-tightening sleeve, 24-semi-circuit ring, 25-sealing gasket, 26-rotating shaft, 27-spray rod arm, 28-groove, 29-circuit ring group, 30-boss. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0027] See also Figure 2-9 The utility model provides a technical solution for the sealing structure of the spray disc of a wall-climbing robot: Example

[0028] The present embodiment provides a spray disc sealing structure of a wall-climbing robot, including a shell 2, a driving mechanism, a spray rod group, a rotating group and a sealing mechanism, wherein the shell 2 is a cylindrical structure, the driving mechanism and the rotating group are respectively fixedly mounted on the upper surface of the shell 2 by screws, and the bottoms are respectively extended downward into the inner cavity of the shell. Furthermore, the driving mechanism in the present embodiment is a reduction motor, which serves as the power source of the entire spray disc, and can make the rotation speed controllable, thereby the operation quality can also be controlled.

[0029] like Figure 2-4 , as shown, the rotating group includes a rotating body 10 and a mounting seat 9, wherein the mounting seat 9 is fixedly mounted on the top surface of the housing by bolts, and a set screw 11 is also provided on the mounting seat. The rotating body 10 is matched and fitted inside the mounting seat 9, and the output shaft of the rotating body 10 extends downward into the inner cavity of the housing, and the end is connected to the spray bar group. By screwing the set screw 11 to make it extend continuously into the mounting seat, the end is tightly against the rotating body in the mounting seat, so that the rotating body is fixed on the spray disc to achieve the positioning effect.

[0030] A sealing mechanism is also provided in the housing above the spray bar group, and the sealing mechanism includes a water retaining shell 12, that is, the water retaining shell 12 is fixedly installed in the housing below the reduction motor and the rotating group, such as Figure 4-7 As shown, a matching sealing gasket 25 is provided on the top surface of the water retaining shell for fixed installation with the top surface of the shell body, and a slave gear accommodating portion 15 and a master gear accommodating portion 16 are also provided in the water retaining shell.

[0031] The output shaft of the reduction motor passes downward through the housing and extends into the main gear accommodating portion 16, and is driven and installed with the main gear 13, and a matching sleeve 23 is also provided on the output shaft at the bottom of the main gear. The output shaft of the rotating body also passes downward through the housing and extends into the slave gear accommodating portion 15 of the water retaining shell, and is driven and installed with the slave gear 14, and the main gear 13 and the slave gear 14 are meshed and driven.

[0032] like Figure 5 and 6As shown, a sealing cavity 17 with a columnar structure is also provided in the gear accommodating portion of the water retaining shell, and the bottom 14 of the gear is just located in the sealing cavity, and the effect of blocking water and slag is achieved through the multi-stage sealing structure arranged in the sealing cavity. Specifically, the inner wall of the sealing cavity is provided with a labyrinth structure 20, a buffer cavity 19 and a friction reduction cavity 18 from bottom to top, and the labyrinth structure 20 is located near the bottom opening of the sealing cavity, and in this embodiment, it is specifically a multi-layer annular groove structure with different volumes opened at even intervals; the buffer cavity is located above the labyrinth structure, and is also specifically an annular groove structure, and the friction reduction cavity is located above the buffer cavity, and a friction reduction combined sealing body is provided in the sealing cavity, and the volume in the friction reduction cavity is larger than the volume in the buffer cavity and larger than the volume in the labyrinth structure.

[0033] Through the structural setting of the sealing cavity in the water retaining shell, when the fluid mixed with waste residue, waste water, etc. flows from the gap between the gear and the inner wall of the sealing cavity to the rotating group, refer to Figure 8 The position and direction of the arrows shown first continuously form vortices through the twists and turns and large and small annular grooves and gaps of the maze structure, thereby continuously reducing the speed of the fluid in the front, and then the fluid behind is "blocked" by the decelerated turbulence in the front, achieving the effect of "sealing water with water".

[0034] Then a small amount of fluid will pass through the labyrinth seal, continue to flow and achieve further deceleration in the buffer cavity, with lower kinetic energy; after a long time, the slowly flowing fluid continues to flow in the direction of the friction reduction cavity, and the friction reduction combined seal body in the friction reduction cavity can further enhance the sealing effect and prevent it from entering the space of the gear transmission.

[0035] The friction-reducing combined seal consists of an external O-ring and an internal sealing ring, wherein the sealing ring is made of a material with a small friction coefficient and is matched with the outer gear to fit closely to the shaft of the gear without affecting the rotation of the gear. The external O-ring can provide the inner ring sealing ring with a preload force inward, promoting the close fit of the inner ring sealing ring, thereby enhancing the sealing effect. In this way, the multi-stage sealing structure of the water retaining plate sealing cavity can be used to block water and slag, thereby effectively avoiding the problem of the gear meshing transmission part being stuck.

[0036] like Figure 3 and Figure 4 As shown, the end of the output shaft of the rotating body is connected to a spray bar group, which is located inside the shell. The rotation of the rotating body 10 drives the rotation of the spray bar group, and the nozzle 8 on the spray bar group sprays liquid to the working area to clean, remove paint, and remove rust on the surface of the tank.

[0037] The utility model provides a spray disc sealing structure of a wall-climbing robot. When in use, the spray disc is installed as a whole on the wall-climbing robot, and the nozzle on the spray disc faces the surface of the working area. When working, it is powered by a reduction motor, and the meshing transmission of the main gear and the slave gear drives the rotation of the slave gear on the rotating body, so that the spray rod group connected to the rotating body rotates, and ultra-high pressure water flow is sprayed to the working surface through multiple nozzles to achieve paint removal, rust removal and other operations on the working surface.

[0038] During the operation, fluid or liquid waste mixed with waste residues such as paint and rust will be generated in the shell, and flow to the gear through the gap between the gear shaft and the inner wall of the sealing chamber. The leaked fluid will generate turbulence and energy loss when passing through the maze structure. Only a small amount of fluid will pass through the labyrinth seal and enter the buffer chamber. The volume inside the buffer chamber is larger, which further slows down the turbulence and loses energy. Afterwards, the O-ring located in the friction reduction chamber will provide pre-tightening force to the sealing ring, making it fit tightly with the shaft, thereby effectively blocking the path for the fluid to continue to flow, thereby protecting the gears in the water retaining shell.

[0039] The spray disc sealing structure of the wall-climbing robot provided by the present invention initially isolates the gear transmission structure from the spray arm group in the shell body through the water retaining shell structure, and then forms a multi-stage sealing structure through the combined sealing body of the maze structure, the buffer chamber and the friction reduction chamber arranged in the water retaining shell, which further effectively prevents waste water, waste residue and the like from invading the inside of the spray disc, protects the normal operation of the driving mechanism and the rotating group, greatly reduces the risk of the spray disc equipment getting stuck, and improves the reliability and stability of the wall-climbing robot. Example

[0040] Based on the first embodiment, the same parts as the first embodiment will not be described again, and the fastening structure between the gear and the rotating body will be introduced. Figure 7 and Fig. 9 As shown, the slave gear 14 is sleeved on the rotating shaft 26 of the rotating body, and a groove 28 is opened along the circumference of the rotating shaft at the bottom of the slave gear, and a snap ring group 29 is arranged in the groove, including two opposite semicircular half snap rings 24. The spray rod group includes a spray rod body 7, and spray rod arms 27 are evenly distributed along the circumference of the spray rod body. Each spray rod arm is respectively provided with a plurality of spray heads 8, and a boss 30 is also provided at the top of the spray rod body, and the boss is in a stepped structure.

[0041] When the rotating shaft 26 of the rotating body is matched and docked with the spray rod body, the boss 30 on the top of the spray rod body and the groove 28 on the rotating shaft together form an annular docking cavity, and the snap ring group is just clamped in the docking cavity. When the rotating body is matched and clamped with the spray rod body, the boss structure of the spray rod body is used to achieve sealing and compression by using the snap ring group, and the gear sleeve can be mounted on the rotating shaft to achieve rotation of the spray rod group through the rotating body. Through such a compact sealing structure design, the sealing and transmission functions can be achieved at the same time, and it is convenient to maintain and replace the seal.

[0042] The above description is only a preferred embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A spray plate sealing structure of a wall-climbing robot, comprising a housing, a driving mechanism, a rotating group, a spray bar group and a sealing mechanism, characterized in that: The driving mechanism and the rotating group are respectively installed on the top surface of the shell, and the output end of the rotating group extends downward and is rotatably connected with the spray bar group in the inner cavity of the shell; a sealing mechanism is arranged in the shell above the spray bar group, and the sealing mechanism includes a water retaining shell, and the output end of the driving mechanism extends downward into the water retaining shell and is connected with a main gear, and a slave gear is installed on the output shaft of the rotating group, and the main gear and the slave gear are meshed for transmission; and the slave gear is located in the columnar sealing cavity of the water retaining shell; the inner wall of the sealing cavity is provided with a labyrinth structure, a buffer cavity and a friction reduction cavity in sequence from bottom to top, and when in use, a multi-stage sealing structure formed by the labyrinth structure, the buffer cavity and the combined sealing body in the friction reduction cavity can realize water and slag blocking.

2. The spray plate sealing structure of the wall-climbing robot according to claim 1, characterized in that: The driving mechanism is a reduction motor; the rotating group includes a rotating body and a mounting seat, the mounting seat is also provided with a set screw, and the rotating body is matched and sleeved inside the mounting seat.

3. The spray plate sealing structure of the wall-climbing robot according to claim 1, characterized in that: A matching sealing gasket is provided on the top surface of the water retaining shell to be fixedly installed with the top surface of the shell body, and a slave gear accommodating portion and a master gear accommodating portion are provided in the water retaining shell.

4. The spray plate sealing structure of the wall-climbing robot according to claim 3, characterized in that: The slave gear accommodating portion is further provided with a sealing cavity with a columnar structure, wherein the labyrinth structure of the sealing cavity is located near the bottom opening of the sealing cavity, and the volume of the labyrinth structure is smaller than the volume of the buffer cavity and the friction reduction cavity.

5. The spray plate sealing structure of the wall-climbing robot according to claim 1, characterized in that: The combined sealing body is composed of an outer O-ring and an inner sealing ring. The sealing ring is sleeved outside the slave gear and can be closely attached to the shaft of the slave gear without affecting the rotation of the gear.

6. The spray plate sealing structure of the wall-climbing robot according to claim 1, characterized in that: The spray bar group comprises a spray bar body, on which spray bar arms are evenly distributed along the circumference, and each spray bar arm is respectively provided with a plurality of spray heads.

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