A nozzle extension rod for a negative pressure adsorption concrete spraying robot

Abstract

This utility model belongs to the technical field of spraying equipment, and specifically provides a nozzle extension rod for a negative pressure adsorption concrete spraying robot. It includes a crank, a rotating sleeve, and a piston cylinder. The rotating sleeve is rotatably mounted on the crank, and the fixed end of the piston cylinder is located on the rotating sleeve. A nozzle is mounted on the piston rod of the piston cylinder. The piston component inside the piston cylinder divides the internal chamber of the piston cylinder into a front chamber and a rear chamber, with the front chamber facing the nozzle. A liquid inlet hole is provided on the piston rod for connecting the nozzle and the front chamber. This nozzle extension rod for a negative pressure adsorption concrete spraying robot has the advantages of simple structure, easy assembly and maintenance. By setting dual liquid supply lines inside the crank and directly supplying liquid to the nozzle using the piston rod on the piston cylinder, it solves the problems of exposed and lengthy liquid supply lines in existing nozzle extension mechanisms, which helps improve spraying efficiency and reduce construction risks.

Description

Technical Field

[0001] This utility model belongs to the technical field of spraying equipment, and in particular relates to a nozzle extension rod for a negative pressure adsorption concrete spraying robot. Background Technology

[0002] Concrete bridge piers of cross-sea bridges are exposed to extreme environments such as seawater erosion, salt spray corrosion, ultraviolet radiation, and wave impact for extended periods. Their surface protective coatings (such as anti-corrosion and waterproof coatings) are crucial for ensuring structural durability and extending service life. Currently, wall-climbing robots are used for spraying concrete pier facades, effectively improving spraying efficiency and quality. However, despite the outstanding performance of concrete wall-climbing spraying robots in improving construction efficiency and quality, their nozzle design still has several shortcomings, which to some extent limit the further promotion and application of these robots.

[0003] In the research of concrete wall-climbing spraying robot nozzle technology, existing achievements mainly focus on two aspects: nozzle type design and performance optimization. Depending on the different requirements of the spraying task, nozzle types can be divided into fixed and adjustable types. Fixed nozzles are widely used in conventional wall spraying tasks due to their simple structure and low cost; while adjustable nozzles achieve extended spraying by introducing a telescopic mechanism. However, existing adjustable nozzles generally mount the nozzle on the telescopic mechanism, with the nozzle's liquid supply pipeline located outside the mechanism. Because these pipelines are exposed and require a significant length allowance for nozzle extension and retraction, they may interfere with the external structure or the robot itself during the wall-climbing robot's movement. This necessitates extra caution from operators when adjusting the nozzle, thus reducing work efficiency and increasing construction risks. Utility Model Content

[0004] In view of this, the present invention aims to propose a nozzle extension rod for a negative pressure adsorption concrete spraying robot, so as to solve the problem that the liquid supply pipeline of the existing nozzle extension mechanism is exposed, which affects the work efficiency and increases the construction risk.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows: A nozzle extension rod for a negative pressure adsorption concrete spraying robot includes a crank, a rotating sleeve, and a piston cylinder. The rotating sleeve is rotatably mounted on the crank, and the fixed end of the piston cylinder is located on the rotating sleeve. A nozzle is provided on the piston rod of the piston cylinder. The piston component inside the piston cylinder divides the internal chamber of the piston cylinder into a front chamber and a rear chamber, with the front chamber facing the nozzle. The piston rod has a liquid inlet hole for connecting the nozzle and the front chamber. The crank has a dual liquid supply passage for supplying liquid to the piston cylinder. A dual-pass rotary joint for connecting the dual liquid supply passages is provided at the rotatable connection between the crank and the rotating sleeve. The fixed end of the piston cylinder has a front liquid supply pipe communicating with the front chamber and a rear liquid supply pipe communicating with the rear chamber. The front liquid supply pipe and the rear liquid supply pipe are respectively connected to two liquid outlet holes of the dual-pass rotary joint.

[0006] Furthermore, the crank component has a detachable limiting component at one end that passes through the rotating sleeve, and a thrust bearing is provided on the side of the limiting component facing the rotating sleeve.

[0007] Furthermore, the limiting member and the crank member are connected by a thread.

[0008] Furthermore, the limiting member is connected to the crank component by a fixing screw, the limiting member is provided with an assembly hole that mates with the fixing screw, and the crank component is provided with an assembly groove that mates with the fixing screw.

[0009] Furthermore, the crank component and the rotating sleeve are rotatably connected by ball bearings.

[0010] Furthermore, the rotating sleeve is provided with a driven wheel, which is coaxially arranged with the rotating sleeve.

[0011] Furthermore, the nozzle is detachably mounted on the piston rod.

[0012] Furthermore, both the front and rear liquid supply pipes are connected to the corresponding liquid outlet holes on the dual-channel rotary joint via connecting pipes.

[0013] Furthermore, one end of the front liquid supply pipe is connected to the front chamber, and the other end is located near the rear liquid supply pipe.

[0014] Compared with existing technologies, the nozzle extension rod for a negative pressure adsorption concrete spraying robot described in this utility model has the following advantages: This utility model discloses a nozzle extension rod for a negative pressure adsorption concrete spraying robot, which has the advantages of simple structure, easy assembly and maintenance. By setting the dual liquid supply pipeline inside the crank component and using the piston rod on the piston cylinder to directly supply liquid to the nozzle, it solves the problems of exposed and redundant liquid supply pipelines in existing nozzle extension mechanisms, which helps to improve spraying efficiency and reduce construction risks. In addition, by rotating the rotating sleeve on the crank component, the nozzle angle can be adjusted by rotating the piston cylinder, further increasing the freedom of nozzle extension and improving the applicability of this extension rod. Attached Figure Description

[0015] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is a schematic diagram of the nozzle extension rod for a negative pressure adsorption concrete spraying robot according to an embodiment of the present invention; Figure 2 for Figure 1 Exploded view; Figure 3 This is a schematic diagram of the piston cylinder in the nozzle extension rod of a negative pressure adsorption concrete spraying robot according to an embodiment of the present invention.

[0016] Explanation of reference numerals in the attached figures: 1. Crank assembly; 2. Rotating sleeve; 3. Piston cylinder; 4. Piston rod; 5. Nozzle; 6. Front supply pipe; 7. Rear supply pipe; 8. Dual-pass rotary joint; 9. Connecting pipe; 10. Limiting component; 11. Thrust bearing; 12. Driven wheel; 13. Ball bearing; 14. Dual supply passages; 15. Fixing screw; 16. Piston assembly; 17. Front chamber; 18. Rear chamber; 19. Inlet port. Detailed Implementation

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0018] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] A nozzle extension rod for a negative pressure adsorption concrete spraying robot, such as Figures 1 to 3 As shown, the device includes a crank assembly 1, a rotating sleeve 2, and a piston cylinder 3. The rotating sleeve 2 is rotatably mounted on the crank assembly 1. The fixed end of the piston cylinder 3 is located on the rotating sleeve 2. The piston rod 4 of the piston cylinder 3 is provided with a nozzle 5. The piston assembly 16 inside the piston cylinder 3 divides the internal chamber of the piston cylinder 3 into a front chamber 17 and a rear chamber 18. The front chamber 17 is positioned facing the nozzle 5. The piston rod 4 is provided with a liquid inlet hole 19 for connecting the nozzle 5 and the front chamber 17. The crank assembly 1 is provided with a dual liquid supply passage 14 for supplying liquid to the piston cylinder 3. The crank assembly 1 and the rotating sleeve 2 are provided with a dual-passage rotary joint 8 for connecting the dual liquid supply passage 14. The fixed end of the piston cylinder 3 is provided with a front liquid supply pipe 6 communicating with the front chamber 17 and a rear liquid supply pipe 7 communicating with the rear chamber 18. The front liquid supply pipe 6 and the rear liquid supply pipe 7 are respectively connected to the two liquid outlet holes of the dual-passage rotary joint 8.

[0022] For example, both the front liquid supply pipe 6 and the rear liquid supply pipe 7 are fixed to the cylinder body of the piston cylinder 3, which is fixed to the rotating sleeve 2. The dual-channel rotary joint 8 can be an existing rotary joint to supply liquid to the front liquid supply pipe 6 and the rear liquid supply pipe 7 separately, which will not be elaborated here. In actual use, the operator can not only use an external liquid supply device to supply liquid to the front chamber 17 to supply the nozzle 5 for spraying, but also use an external liquid supply device to supply liquid to the rear chamber 18 or evacuate the rear chamber 18 to drive the nozzle 5 to extend and retract, thereby adapting to the needs of spraying operations in different positions. In addition, the operator can also use an external drive device to drive the piston cylinder 3 to rotate with the rotating sleeve 2 to adjust the angle of the nozzle 5, further increasing the freedom of movement of the nozzle 5 and improving the applicability of this extension rod.

[0023] It should be noted that the piston cylinder 3 can be a conventional hydraulic cylinder, a single-rod piston cylinder, etc. It only requires an inlet hole 19 to be opened on the piston rod 4, and the nozzle 5 to be installed and fixed to the end of the piston rod 4, so that the inlet hole 19 can connect the front chamber 17 and the nozzle 5. The paint can be oil-based paint, water-based paint, etc. It should be understood that although the dynamic viscosity and density of oil-based paint are higher than those of conventional hydraulic oil, and the pumping power needs to be recalibrated when used directly as a "hydraulic medium," oil-based paint is not fundamentally different from hydraulic oil in terms of "pumpability." Furthermore, since the paint itself is the final working medium to be sprayed by this device, even if a small amount of paint leaks along the piston, it will not cause the traditional risk of "hydraulic oil contamination leading to system failure"; on the contrary, the leaked paint can fall directly onto the concrete facade below, without constituting a functional hindrance.

[0024] In actual use, liquid can be supplied to the front chamber 17 and the rear chamber 18 through an external liquid supply device. By controlling the flow rate of the front chamber 17 and the pressure difference between the front and rear chambers 18, the pressure in the front chamber 17 and the rear chamber 18 can be kept stable while the nozzle 5 is spraying, so as to ensure that the piston rod 4 does not move during the spraying process of the nozzle 5. Those skilled in the art can achieve this through control valves, pressure devices, etc., as needed, which will not be elaborated here.

[0025] Optionally, the dual liquid supply passage 14 includes a first liquid supply passage and a second liquid supply passage. The first liquid supply passage is connected to the front liquid supply pipe 6 through one of the passages in the dual-passage rotary joint 8, and the second liquid supply passage is connected to the rear liquid supply pipe 7 through the other passage in the dual-passage rotary joint 8. In addition, those skilled in the art can also choose other arrangements of the dual liquid supply passage 14 according to actual needs to achieve liquid supply to the piston cylinder 3, which will not be elaborated here.

[0026] In practical applications, by employing the aforementioned dual liquid supply passages 14, liquid supply to the piston cylinder 3 and nozzle 5 can be achieved without affecting the movement of the rotating sleeve 2 and piston cylinder 3. This not only simplifies the liquid supply passage structure but also allows the piston cylinder 3 to rotate 360 ​​degrees with the rotating sleeve 2, increasing the freedom of movement of the nozzle 5 and resulting in higher spraying efficiency and better spraying effect. Furthermore, by controlling the liquid supply to the front and rear chambers 18 of the piston cylinder 3, the piston cylinder 3 can be driven to extend and retract the nozzle 5 when necessary, meeting the needs of leak repair spraying for different shapes and positions, thus improving the applicability of this device.

[0027] Optionally, two external pipes can be connected to the upper end of the crank assembly 1 to achieve liquid supply to the dual liquid supply channels. This nozzle 5 extension rod can be used in conjunction with a first liquid supply pump, a second liquid supply pump, and a storage tank. The inlet ends of both the first and second liquid supply pumps are connected to the storage tank; the outlet end of the first liquid supply pump can be connected to the first liquid supply channel within the crank assembly 1 via an external pipe, and the outlet end of the second liquid supply pump can be connected to the second liquid supply channel within the crank assembly 1 via an external pipe. It should be noted that, in order to detect the pressure in the front chamber 17 and the rear chamber 18, pressure gauges, flow meters, and other sensors can be installed at the outlet ends of the first and second liquid supply pumps to control the extension and retraction of the piston rod 4 of the piston cylinder 3, while simultaneously meeting the spraying requirements of the nozzle 5.

[0028] For example, by loading the paint to be sprayed into the storage tank and pumping it into the piston cylinder 3 using the first and second supply pumps, when the pressure in the front chamber 17 and the rear chamber 18 of the piston cylinder 3 is the same, the piston rod 4 does not move, and the paint can be sprayed onto the concrete surface through the nozzle 5.

[0029] For example, when the pressure in the current chamber 17 is greater than the pressure in the rear chamber 18, the piston rod 4 shortens, causing the nozzle 5 to move and pushing the paint in the rear chamber 18 back into the storage tank. The nozzle 5 will continue to spray paint during the movement.

[0030] Conversely, when the pressure in the front chamber 17 is less than the pressure in the rear chamber 18, the piston rod 4 extends, causing the nozzle 5 to move and pushing the paint in the front chamber 17 back into the storage tank. The pumping speed controlled by the first supply pump can control whether the nozzle 5 is spraying. For example, when the pumping speed is fast, there is insufficient pressure at the nozzle 5, so no spraying occurs. When the pumping speed is slow, there is sufficient pressure at the nozzle 5, so spraying can continue when the piston rod 4 extends. The specific adjustment can be made according to the actual spraying needs.

[0031] As can be seen from the above, the nozzle 5 extension rod described in this embodiment has multiple working modes. By using an external driving device to drive the rotating sleeve 2 to rotate, the piston cylinder 3 and piston rod 4 on the rotating sleeve 2 drive the nozzle 5 to extend and retract, so that the nozzle 5 can move, rotate or swing in multiple dimensions, which can well adapt to the needs of repairing and spraying omission areas of different shapes, and has good adaptability and versatility.

[0032] Preferably, the crank component 1 has a detachable limiting member 10 at one end passing through the rotating sleeve 2, and a thrust bearing 11 is provided on the side of the limiting member 10 facing the rotating sleeve 2. By providing a detachable limiting member 10 on the crank component 1, the assembly of the rotating sleeve 2 on the crank component 1 can be facilitated, making it convenient for operators to disassemble and maintain the piston cylinder 3. In actual use, by providing a thrust bearing 11 between the limiting member 10 and the rotating sleeve 2, the friction between the limiting member 10 and the rotating sleeve 2 can be reduced, which is beneficial for the rotating sleeve 2 to rotate easily and thus drive the nozzle 5 to spray. In addition, it also helps to reduce the probability of the limiting member 10 becoming loose.

[0033] Optionally, the limiting member 10 and the crank member 1 are connected by a thread. Specifically, the end of the crank member 1 is provided with an external thread, and the limiting member 10 is provided with a threaded hole that mates with the external thread.

[0034] Optionally, the limiting member 10 is connected to the crank member 1 via a fixing screw 15. The limiting member 10 has an assembly hole that mates with the fixing screw 15, and the crank member 1 has an assembly groove that mates with the fixing screw 15. It should be noted that the assembly groove is not connected to the dual liquid supply passage 14 inside the crank member 1.

[0035] In practical applications, the above two methods can be used together to achieve the detachable assembly of the limiting component 10 on the crank component 1. Compared with the single installation method, this is conducive to further improving the stability of the limiting component 10 after installation, and ensuring that the limiting component 10 can continuously and stably limit the rotating sleeve 2.

[0036] Preferably, the crank component 1 and the rotating sleeve 2 are rotatably connected by a ball bearing 13, which helps to reduce the friction between the rotating sleeve 2 and the crank component 1.

[0037] In practical applications, the rotating sleeve 2 is equipped with a driven wheel 12, which is coaxially arranged with the rotating sleeve 2. The driven wheel 12 is fixed to the rotating sleeve 2. In actual use, the operator can use an external drive device to drive the driven wheel 12, thereby driving the rotating sleeve 2 to rotate around one end of the crank component 1 as its axis for adjustment.

[0038] Preferably, the nozzle 5 is detachably mounted on the piston rod 4. Exemplarily, the nozzle 5 and the piston rod 4 can be connected by conventional means such as threads. Those skilled in the art can also choose other methods to install the nozzle 5 according to actual needs, so as to achieve detachable assembly of the nozzle 5 on the piston rod 4, which will not be elaborated here.

[0039] Preferably, both the front supply pipe 6 and the rear supply pipe 7 are connected to the corresponding outlet holes on the dual-channel rotary joint 8 via connecting pipes 9. For example, two connecting pipes 9 are provided, one end of which is connected to the dual-channel rotary joint 8, and the other end is connected to the corresponding front supply pipe 6 or rear supply pipe 7.

[0040] Preferably, one end of the front supply pipe 6 is connected to the front chamber 17, and the other end is positioned close to the rear supply pipe 7. By positioning the end of the front supply pipe 6 close to the rear supply pipe 7, it is beneficial to reduce the length of the connecting pipe 9, thereby avoiding the connection pipe 9 from affecting the movement of this extension rod.

[0041] This utility model discloses a nozzle extension rod for a negative pressure adsorption concrete spraying robot, which has the advantages of simple structure, easy assembly and maintenance. By setting the dual liquid supply pipeline inside the crank component and using the piston rod on the piston cylinder to directly supply liquid to the nozzle, it solves the problems of exposed and redundant liquid supply pipelines in existing nozzle extension mechanisms, which helps to improve spraying efficiency and reduce construction risks. In addition, by rotating the rotating sleeve on the crank component, the nozzle angle can be adjusted by rotating the piston cylinder, further increasing the freedom of nozzle extension and improving the applicability of this extension rod.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A nozzle extension pole for a negative pressure adsorption concrete spraying robot, characterized by: The device includes a crank assembly (1), a rotating sleeve (2), and a piston cylinder (3). The rotating sleeve (2) is rotatably mounted on the crank assembly (1). The fixed end of the piston cylinder (3) is located on the rotating sleeve (2). A nozzle (5) is provided on the piston rod (4) of the piston cylinder (3). The piston assembly (16) inside the piston cylinder (3) divides the internal chamber of the piston cylinder (3) into a front chamber (17) and a rear chamber (18). The front chamber (17) faces the nozzle (5). The piston rod (4) is provided with a means to connect the nozzle (5) and the front chamber (17). The crank (1) has a liquid inlet hole (19); the crank (1) is provided with a dual liquid supply passage (14) for supplying liquid to the piston cylinder (3); the crank (1) and the rotating sleeve (2) are provided with a dual-passage rotary joint (8) for connecting the dual liquid supply passage (14); the piston cylinder (3) is provided with a front liquid supply pipe (6) connected to the front chamber (17) and a rear liquid supply pipe (7) connected to the rear chamber (18) on the fixed end; the front liquid supply pipe (6) and the rear liquid supply pipe (7) are respectively connected to the two liquid outlet holes of the dual-passage rotary joint (8).

2. A nozzle extension pole for a negative pressure adsorption concrete spraying robot according to claim 1, characterized in that: The crank component (1) has a detachable limiting component (10) at one end that passes through the rotating sleeve (2), and a thrust bearing (11) is provided on the side of the limiting component (10) facing the rotating sleeve (2).

3. The nozzle extension rod for a negative pressure adsorption concrete spraying robot according to claim 2, characterized in that: The limiting member (10) and the crank member (1) are connected by a thread.

4. A nozzle extension rod for a negative pressure adsorption concrete spraying robot according to claim 2 or 3, characterized in that: The limiting member (10) is connected to the crank member (1) by a fixing screw (15). The limiting member (10) is provided with an assembly hole that cooperates with the fixing screw (15), and the crank member (1) is provided with an assembly groove that cooperates with the fixing screw (15).

5. The nozzle extension rod for a negative pressure adsorption concrete spraying robot according to claim 1, characterized in that: The crank component (1) and the rotating sleeve (2) are rotatably connected by a ball bearing (13).

6. The nozzle extension rod for a negative pressure adsorption concrete spraying robot according to claim 1, characterized in that: The rotating sleeve (2) is provided with a driven wheel (12), which is coaxially arranged with the rotating sleeve (2).

7. The nozzle extension rod for a negative pressure adsorption concrete spraying robot according to claim 1, characterized in that: The nozzle (5) is detachably mounted on the piston rod (4).

8. The nozzle extension rod for a negative pressure adsorption concrete spraying robot according to claim 1, characterized in that: Both the front liquid supply pipe (6) and the rear liquid supply pipe (7) are connected to the corresponding liquid outlet holes on the dual-channel rotary joint (8) through the connecting pipe (9).

9. The nozzle extension rod for a negative pressure adsorption concrete spraying robot according to claim 8, characterized in that: One end of the front liquid supply pipe (6) is connected to the front chamber (17), and the other end is located near the rear liquid supply pipe (7).

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