CN108036054B - Obstacle surmounting sealing mechanism for cleaning disc - Google Patents

Abstract

The invention discloses a barrier-crossing sealing mechanism for a cleaning disc. The invention comprises a connecting component, an obstacle surmounting sleeve and a sealing component; the connecting assembly comprises a spring mechanism and a fold rubber sleeve, and two ends of the fold rubber sleeve are respectively connected with the cleaning disc and the obstacle surmounting sleeve by using a clamp. The spring mechanism is distributed on the circumference of the cleaning disc, is positioned by the spring positioning body and the positioning screw and is fixed by means of the butterfly nut. The fold part of the fold rubber sleeve compensates the relative displacement of the obstacle surmounting sleeve to the cleaning disc when surmounting the obstacle, so that the tightness of the inside of the cleaning disc is ensured. The friction pad between the obstacle surmounting sleeve and the working surface is made of a hard high polymer polyethylene material. The mechanism has the advantages of difficult damage, small moving resistance and the like. The obstacle crossing sealing mechanism adopts the adjustable spring assembly, and the pressing force and the relative position of the obstacle crossing sleeve on the working surface are changed through the adjusting nut, so that the obstacle crossing sealing mechanism can be flexibly adapted to various working conditions.

Description

Obstacle-crossing sealing mechanism for cleaning disc

Technical Field

The invention belongs to the field of water jet decontamination and cleaning equipment, in particular to a cleaning disc sealing mechanism with an obstacle-crossing function, which is applied to a wall-climbing cleaning robot.

Background technique

At present, the wall-climbing robot is equipped with cleaning equipment, which integrates high-pressure water jet decontamination, vacuum system drying and slag removal, and wall-climbing robot rust removal. In the vacuum chamber of the cleaning plate, some water will accumulate on the surface of the steel plate treated by the high-pressure water jet, causing rust to re-occur, i.e., rust regeneration. The wastewater generated by rust removal can only be effectively prevented from rusting and environmentally friendly if it is pumped away by the negative pressure of the vacuum system, thereby improving the quality and efficiency of rust removal. Therefore, ensuring the sealing of the cleaning plate is particularly important for the recovery of wastewater.

Common wall-climbing high-pressure water cleaning robots use brushes as seals to achieve the fit between the cleaning plate and the working surface, so as to form a relatively closed space, making it possible to vacuum-recover the wastewater in the cleaning plate. However, the brushes are mostly made of nylon, which has high rigidity and poor obstacle-crossing ability, which affects the application scope of this type of robot. Due to the above defects and deficiencies, it is urgent to design a cleaning plate mechanism that is convenient for crossing obstacles and can maintain good sealing performance.

Summary of the invention

The purpose of the present invention is to provide a cleaning disk sealing structure with obstacle climbing function, which ensures good sealing with the working surface while climbing over obstacles, thereby ensuring that a certain vacuum degree can be formed inside the cleaning disk and realizing waste water recovery.

To achieve the above purpose, the specific contents of the technical solution of the present invention are as follows:

The present invention includes a connection assembly, an obstacle-crossing sleeve and a sealing assembly; the connection assembly includes a spring mechanism and a pleated rubber sleeve, and the two ends of the pleated rubber sleeve are respectively connected to the cleaning disc and the obstacle-crossing sleeve by clamps. The spring mechanism is distributed around the cleaning disc, and the spring mechanism is positioned by a spring positioning body and an adjustment screw, and is fixed by a butterfly nut. The pleated part of the pleated rubber sleeve compensates for the relative displacement of the obstacle-crossing sleeve to the cleaning disc when crossing an obstacle, thereby ensuring the sealing inside the cleaning disc.

The sealing assembly comprises soft rubber and a hard friction pad. One end of the soft rubber is connected to the obstacle sleeve by a clamp, and the other end is connected to the hard friction pad by bolts or rivets.

Furthermore, the hard friction pad is a high molecular polyethylene sheet. The high molecular polyethylene sheet is an annular flat plate structure, and its outer edge is rolled up after heat treatment, which helps the structure to climb over obstacles smoothly. The inner edge of the hard friction pad is rounded on one side close to the working surface, so that obstacles that have entered the cleaning disc can pass smoothly.

Beneficial effects of the present invention:

Compared with the previous cleaning disc structure, the present invention has the function of climbing over obstacles, so that the wall-climbing cleaning robot equipped with the mechanism can adapt to more complex working conditions.

The friction pad between the obstacle-crossing sleeve and the working surface of the present invention is made of hard high-molecular polyethylene material. Since high-molecular polyethylene material has excellent properties such as wear resistance, low friction coefficient, and crack resistance, the mechanism has the advantages of being not easily damaged and having low movement resistance under normal working conditions.

The obstacle-crossing sealing mechanism of the present invention adopts an adjustable spring assembly, and the pressing force and relative position of the obstacle-crossing sleeve on the working surface can be changed by adjusting the nut, thereby being able to flexibly adapt to various working conditions.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is an overall structural diagram of the present invention;

Fig. 2 is a cross-sectional view of the overall structure of the present invention;

FIG3 is a schematic diagram of the present invention applied to a wall-climbing cleaning robot;

In the figure: 1-cleaning disc upper plate, 2-cleaning disc end sealing ring, 3-cleaning disc, 4-pleated rubber, 5-obstacle sleeve, 6-butterfly nut, 7-spring upper fixing plate, 8-spring positioning body, 9-adjusting screw, 10-spring, 11-soft rubber clamp, 12-fixing bolt, 13-soft rubber, 14-polymer polyethylene friction pad, 15-pleated rubber clamp, 16-rotator, 17-vacuum water outlet joint, 18-breathing valve, 19-obstacle sealing mechanism.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

As shown in Figure 1, a high-pressure water jet rotator, a spray rod and a nozzle for generating water jets are installed inside the cleaning disk. High-pressure water enters the cleaning disk cavity through the inlet of the rotator 16 for decontamination, and the generated waste water is recovered and processed through the vacuum water outlet joint 17 under the action of vacuum negative pressure; at the same time, the vacuum degree of the cleaning disk cavity can be changed by adjusting the breathing valve 18 to ensure the recovery of waste water.

The obstacle sleeve 5 is connected to the high molecular polyethylene friction pad 14 via the soft rubber 13, one end of the soft rubber is fixed to the obstacle sleeve 5 by the clamp 11, and the other end is fixed to the high molecular polyethylene friction pad 14 by the bolt 12. The annular high molecular polyethylene friction pad 14 is thin enough to have a certain flexibility.

Combined with Figure 2, the obstacle crossing working condition is analyzed. When the cleaning disc moves forward, it encounters an obstacle, such as a weld or a small-scale protrusion. Due to the upward curling shape of the edge of the polymer polyethylene friction pad 14, its edge will smoothly climb over the obstacle. Due to the characteristics of the soft rubber 13, the upward movement of the outer edge of the polymer polyethylene friction pad 14 will not immediately cause the upward movement of the obstacle crossing sleeve 5. As the obstacle continues to move into the cavity, the lower wing plate of the obstacle crossing sleeve is gradually lifted upward by the contact force of the inner edge of the polymer polyethylene friction pad 14, compressing the spring mechanism connected to the cleaning disc, thereby making the part of the obstacle crossing sleeve 5 close to the obstacle completely higher than the obstacle. At the same time, the outer edge of the polymer polyethylene friction pad 14 will gradually fit the working surface again under the action of gravity, thereby ensuring the effective vacuum range inside the cleaning disc during the obstacle crossing process. When the obstacle is separated from the mechanism, the obstacle crossing sleeve 5 will return to the state before the obstacle disturbance under the combined action of the spring mechanism and its own gravity, and the process is exactly the opposite of entering.

The sealing performance is described in conjunction with Figure 2. The two ends of the pleated rubber 4 are fixed to the cleaning disc 3 and the obstacle-crossing sleeve 5 respectively through the pleated rubber clamp 15. During the obstacle-crossing process, the obstacle-crossing sleeve 5 and the cleaning disc 3 are relatively displaced, and the pleated part in the middle of the pleated rubber 4 stretches or shrinks to compensate for the relative displacement, thereby ensuring the sealing performance of the gap in the structure.

The soft rubber 13 is fixed to the high molecular polyethylene friction pad 14 by bolts 12. Under the negative pressure in the inner cavity of the cleaning disk, the soft rubber 13 will fit tightly in the gaps between the bolts, thereby ensuring the vacuum degree in the cleaning disk cavity.

In conjunction with FIG. 2 , it is explained that the relative height and pressing force of the obstacle sleeve 5 to the working surface can be changed by adjusting the butterfly nut 6. For example, tightening the butterfly nut 6 causes the spring 10 to contract, and the adjustment screw 9 pulls the obstacle sleeve 5 upward, thereby changing its height relative to the metal working surface. Similarly, loosening the butterfly nut 6 causes the spring 10 to recover, and the contact force is transmitted to the high molecular polyethylene friction pad 14, increasing the pressure between it and the working surface.

As shown in FIG3 , the cleaning disc is rigidly fixed on the wall-climbing cleaning robot. When working, the vertical height from the working surface remains unchanged and moves with the robot. The obstacle-crossing sealing mechanism 19 of the cleaning disc uses a spring assembly between the cleaning disc and the obstacle-crossing sleeve. When contacting an obstacle, the obstacle-crossing sleeve is lifted, and the spring mechanism is compressed and contracted to ensure smooth climbing over the obstacle. When crossing the obstacle, the spring mechanism is restored, so that the obstacle-crossing sleeve and the sealing assembly are tightly fitted with the working surface again.

Claims (1)

1. Obstacle crossing sealing mechanism of cleaning disc, its characterized in that: comprises a connecting component, an obstacle surmounting sleeve and a sealing component;

The connecting component comprises a spring mechanism and a fold rubber sleeve, and two ends of the fold rubber sleeve are respectively connected with the cleaning disc and the obstacle surmounting sleeve by using a clamp; the spring mechanism is distributed on the periphery of the cleaning disc, one end of the spring mechanism is positioned by a spring positioning body and a positioning screw and is fixed with the cleaning disc by means of a butterfly nut, and the other end of the spring mechanism is fixed with the obstacle crossing sleeve by the spring positioning body; the fold part of the fold rubber sleeve compensates the relative displacement of the obstacle surmounting sleeve to the cleaning disc when surmounting the obstacle, so that the tightness of the interior of the cleaning disc is ensured;

The sealing component comprises soft rubber and a hard friction pad, wherein one end of the soft rubber is connected with the obstacle crossing sleeve through a clamp, and the other end of the soft rubber is connected with the hard friction pad through a bolt or a rivet;

The hard friction pad is a high molecular polyethylene sheet; the macromolecule polyethylene sheet is of an annular flat plate structure, and the outer edge of the macromolecule polyethylene sheet is rolled up through heat processing treatment, so that the structure can smoothly climb over an obstacle; a round angle is formed on one side of the inner edge of the hard friction pad close to the working surface, so that obstacles entering the cleaning disc can pass through smoothly, and specifically:

the cleaning disc forwards moves to meet the obstacle, the edge of the cleaning disc smoothly climbs over the obstacle due to the upward curling shape of the edge of the high polymer polyethylene friction pad, and the upward movement of the outer edge of the high polymer polyethylene friction pad does not immediately cause the upward movement of the obstacle surmounting sleeve due to the characteristic of soft rubber;

Along with the continuous movement of the obstacle into the cavity, the lower wing plate of the obstacle crossing sleeve is gradually lifted upwards by the contact force of the inner edge of the high polymer polyethylene friction pad, so that a spring mechanism connected with the cleaning disc is compressed, and the part of the obstacle crossing sleeve, which is close to the obstacle, is completely higher than the obstacle;

meanwhile, the outer edge of the high polymer polyethylene friction pad is gradually attached to the working surface again under the action of gravity, so that the range of effective vacuum degree in the cleaning disc in the obstacle crossing process is ensured;

Tightening the butterfly nut to shrink the spring, and pulling the obstacle surmounting sleeve to move upwards by the positioning screw so as to change the height of the obstacle surmounting sleeve to the working surface; unscrewing the wing nut allows the spring to recover and the contact force is transferred to the high molecular polyethylene friction pad so that the pressure between the high molecular polyethylene friction pad and the working surface is increased.