A water-powered automatic scrubbing device for the surface of rubber dams

Abstract

This invention relates to the fields of hydraulic machinery and mechanical cleaning, specifically to an automatic device for scrubbing the surface of a rubber dam using water energy. The device includes a support unit, a drive unit, a transmission unit, and a scrubbing unit. The support unit is placed on top of the rubber dam, the transmission unit is mounted on the support unit, and the drive unit and the scrubbing unit are mounted on the transmission unit. This invention utilizes the kinetic and potential energy of the water overflowing from the surface of the rubber dam to drive an impeller to rotate. The impeller transmits power to a sprocket, which drives a chain to achieve transmission. A scrubbing brush is mounted on the chain, contacting the surface of the rubber dam to achieve scrubbing. The entire scrubbing process utilizes only the kinetic and potential energy of the river water, without using any other energy sources, incurring no energy costs, and achieving a green, environmentally friendly, and pollution-free process.

Description

Technical Field

[0001] This invention relates to the fields of hydraulic machinery and cleaning, specifically to a device for automatically scrubbing the surface of a rubber dam using water power. Background Technology

[0002] Rubber dams, as hydraulic structures, have been widely used in various rivers for many years, especially in urban rivers with significant elevation differences. These dams serve multiple purposes, including water storage, flood control, and irrigation, and also beautify the environment. However, during use, dirt accumulates on the surface of the rubber dams, which is exposed downstream, negatively impacting the overall river and even the city's landscape. To maintain a beautiful river environment, the dirt on the rubber dam surface needs regular cleaning. Currently, cleaning is mainly done manually, using cleaning solutions to chemically react with the dirt. This method presents challenges such as high labor intensity for operators, significant safety risks, and severe environmental pollution from the cleaning solutions. Even when using power tools, these tools are not specifically designed for rubber dam cleaning, resulting in unsatisfactory cleaning effects, significant safety risks, and high energy consumption, while the river's own hydropower is not effectively utilized. This high cost places a heavy economic burden on relevant management units.

[0003] To address the aforementioned problems, a water-powered automatic scrubbing device for rubber dam surfaces was designed. Utilizing the energy of overflowing river water from the dam surface, an impeller is driven to rotate. Simultaneously, the shaft on which the impeller is mounted rotates, and a sprocket is mounted on this shaft, also rotating. The sprocket and its shaft are positioned at the top and bottom of the rubber dam surface, respectively. Under the action of the sprocket, a chain cooperating with it performs a continuous unidirectional rotary motion, forming a ring. The inner ring is equidistant from the rubber dam surface, while the outer ring is further away from the surface and is an arc shape approximating the shape of the rubber dam surface. The connection point is a semi-circular ring. Roller brush shafts, acting as chain pins, are installed on the chain's pin holes at equal intervals (greater than the chain pitch). These roller brushes, in addition to their pin-like function, also have roller brushes mounted on them. As the chain rotates, the roller brushes contact the rubber dam surface when they reach the inner ring, creating relative sliding and thus cleaning the surface. Several roller brushes continuously clean the rubber dam surface in one direction, improving efficiency and ensuring effective cleaning. The device moves along the length of the rubber dam via rolling wheels, repeating the cleaning motion after each movement. Multiple movements complete the cleaning of the entire rubber dam surface. This device utilizes continuous river water for continuous cleaning of the rubber dam. No cleaning agents are used during the cleaning process, making it environmentally friendly and pollution-free. It is powered by the energy of the river water, requiring no energy costs, only a one-time manufacturing and maintenance fee. It enables continuous cleaning without the need for manual cleaning, significantly reducing safety risks. Summary of the Invention

[0004] The technical problem to be solved by this invention is: to design an automatic scrubbing device for rubber dam surfaces driven by water energy, to replace traditional manual scrubbing, to solve the problem of using river water as a readily available energy source to achieve zero-energy-cost operation, to solve the problem of the scrubbing brush traveling along the cross-sectional trajectory of the rubber dam, to solve the problem of the scrubbing brush closely adhering to the surface of the rubber dam during its travel, and to solve the problem of the scrubbing brush operating in an orderly and continuous manner without interference.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is an automatic device for cleaning the surface of a rubber dam using water power, comprising four parts: a support unit, a drive unit, a transmission unit, and a cleaning unit. The support unit is placed on top of the rubber dam, the transmission unit is mounted on the support unit, and both the drive unit and the cleaning unit are mounted on the transmission unit. The transmission unit, drive unit, and cleaning unit are all located on the side of the rubber dam that needs cleaning. The other side of the rubber dam is in direct contact with the intercepted river water, does not leak, and does not require cleaning. A weight is hoisted to the support unit on this side via ropes, and the support unit is connected to a safety rope above the rubber dam via ropes.

[0006] The support unit includes a main upright plate, traveling wheels, traveling wheel brackets, adjusting bolts, and a connecting plate. The support unit has a symmetrical structure, with two main upright plates, one on each side, arranged symmetrically. The bottom surface of each main upright plate contacts the surface of the rubber dam. Two threaded holes are provided on each main upright plate for installing the adjusting bolts. A long groove is provided below the threaded holes, in which the traveling wheel brackets are installed. The traveling wheels are mounted on the traveling wheel brackets. The two main upright plates are connected by the connecting plate.

[0007] The drive unit consists only of impellers, which are arranged symmetrically on both sides, with two impellers on each side. The impellers are mounted on the impeller sprocket shaft.

[0008] The transmission unit includes a support guide plate, a lower support guide plate, a sprocket shaft, a sprocket, a chain, a roller, a pin, an upper adjusting screw, a lower adjusting screw, an adjusting nut, and a sprocket shaft, thereby realizing power transmission.

[0009] Two support guide plates are provided, symmetrically arranged left and right, and respectively installed on the main upright plates on the left and right sides. The blade sprocket shaft is installed at both ends of each support guide plate. Two lower support guide plates are provided, respectively installed on the blade sprocket shaft at the lower end of the two support guide plates. The lower support guide plates can rotate around the blade sprocket shaft. The pin is installed at the lower end of the support guide plate, and the sprocket shaft is installed at the other end of the lower support guide plate. One end of the upper adjusting screw is sleeved on the pin, and the other end is threaded to the adjusting nut. One end of the lower adjusting screw is sleeved on the sprocket shaft, and the other end is threaded to the adjusting nut. The threads on the upper adjusting screw and the lower adjusting screw have the same size but opposite directions of rotation. The threads at both ends of the adjusting nut have the same size but opposite directions of rotation.

[0010] Each blade sprocket shaft is equipped with two sprockets, which are symmetrically arranged on the blade sprocket shaft (i.e., left-right symmetrical arrangement). The sprockets rotate synchronously with the blade sprocket shaft. A sprocket shaft is also equipped with two sprockets, which are symmetrically arranged on the blade sprocket shaft (i.e., left-right symmetrical arrangement). A sprocket is loosely fitted onto the sprocket shaft, and the two do not rotate synchronously. Two chains are provided, symmetrically arranged left-right. The left chain and the left three sprockets are on the same plane and mesh with each other. The right chain and the right three sprockets are on the same plane and mesh with each other. The two pairs of sprockets on the blade sprocket shaft drive the chain rotation, and the one pair of sprockets on the blade sprocket shaft, together with the two pairs of sprockets on the blade sprocket shaft, support the chain.

[0011] The scrubbing unit includes a roller brush shaft and a roller brush.

[0012] The roller brush shafts are evenly spaced on the chain. The roller brush shaft structure is symmetrical and divided into 5 sections. The middle section is centrally located and houses the roller brush. The remaining 4 sections have the same diameter as the chain pin. The two sections immediately adjacent to the middle section mate with the chain pin holes. The two sections at the very ends are for mounting rollers. The roller diameter is slightly smaller than the roller brush diameter. When the roller brush contacts the rubber dam surface, the roller does not contact the rubber dam surface. When the roller brush is located on the outer ring of the rotating chain, the roller contacts the outer ring of the support guide plate and the lower support guide plate, and the roller brush is suspended. The roller also supports the chain, ensuring that the chain and the roller brush rotate in an orderly manner during rotation. The chain, the roller brush, and the roller brush shaft on the outer ring (away from the rubber dam surface) will not clump together with the chain, the roller brush, the roller brush shaft, and the blade sprocket shaft on the inner ring (close to or in contact with the rubber dam surface) under the influence of gravity.

[0013] The roller brush shaft is mounted on the chain, and the roller brush is mounted on the middle part of the roller brush shaft and is symmetrical from left to right. The roller brush is in direct contact with the rubber dam and moves unidirectionally relative to the surface of the rubber dam to clean the surface of the rubber dam.

[0014] The aforementioned water-powered automatic scrubbing device for the surface of a rubber dam uses components well-known to those skilled in the art and obtainable through known means. The connection methods for these components are also mastered by those skilled in the art.

[0015] Compared with the prior art, the beneficial effects of the present invention are: (1) The present invention provides an automatic scrubbing device for the surface of a rubber dam driven by water energy, which realizes automatic scrubbing instead of manual scrubbing. During the scrubbing process, unmanned operation is achieved, which greatly reduces the safety risks and labor intensity of scrubbing personnel.

[0016] (2) The above scheme uses the energy of river water to drive the roller brush to perform unidirectional repeated scrubbing along the curved surface of the rubber dam. Compared with the use of fuel, electricity and other energy sources, there is no energy cost, which greatly saves costs.

[0017] (3) The present invention provides an automatic scrubbing device for rubber dam surfaces driven by water energy. It is suitable for use in areas where river water overflows on rubber dams. These areas are prone to forming stains such as scale and mud. The surfaces of rubber dams without river water overflow are relatively clean and remain so for a long time, so they basically do not need to be cleaned. Therefore, the conditions required to realize the function of the present invention are very consistent with the conditions of the rubber dam surfaces that need to be cleaned. Moreover, the overall structure of the device is simple, the overall quality is controllable, and it is easy to process, manufacture and promote its application. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of an automatic rubber dam surface cleaning device driven by water energy according to the present invention.

[0020] Figure 2 This is a front view of a water-powered automatic scrubbing device for the surface of a rubber dam, according to the present invention.

[0021] Figure 3 This is a top view of an automatic scrubbing device for rubber dam surfaces driven by water energy, according to the present invention.

[0022] Figure 4 This is a left view of an automatic scrubbing device for the surface of a rubber dam that utilizes water power, according to the present invention.

[0023] Figure 5 This is a structural schematic diagram of the support unit.

[0024] Figure 6 This is a schematic diagram of the transmission unit structure.

[0025] Figure 7 This is a schematic diagram of the support guide plate structure in the transmission unit.

[0026] Figure 8 This is a schematic diagram of the lower support guide plate structure in the transmission unit.

[0027] Figure 9 This is a schematic diagram of the upper (lower) adjusting screw structure in the transmission unit.

[0028] Figure 10 This is a schematic diagram of the roller brush structure in the scrubbing unit and a partial enlarged view.

[0029] In the diagram: 1. Support unit, 2. Drive unit, 3. Transmission unit, 4. Scrubbing unit, 10. Main upright plate, 11. Traveling wheel, 12. Traveling wheel bracket, 13. Adjusting bolt, 14. Connecting plate, 20. Impeller, 30. Support guide plate, 31. Lower support guide plate, 32. Impeller sprocket shaft, 33. Sprocket, 34. Chain, 35. Roller, 36. Pin, 371. Upper adjusting screw, 372. Lower adjusting screw, 38. Adjusting nut, 39. Sprocket shaft, 40. Brush shaft, 41. Brush. Detailed Implementation

[0030] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0031] Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0032] In the description of this invention, it should be noted that the terms "upper", "lower", "left", "right", "front", "top", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" 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 direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] like Figure 1As shown, the present invention discloses an automatic water-powered scrubbing device for the surface of a rubber dam, comprising a support unit 1, a drive unit 2, a transmission unit 3, and a scrubbing unit 4. The support unit 1 is in contact with the top surface of the rubber dam, the transmission unit 3 is mounted on the support unit 1, and both the drive unit 2 and the scrubbing unit 4 are mounted on the transmission unit 3. Except for the support unit 1, which is centrally located on the top of the rubber dam, the rest of the device is located on the exposed side of the rubber dam surface, i.e., the side that needs to be scrubbed. To ensure the stability of the device on the top of the rubber dam, the water-blocking side of the rubber dam is connected to the support unit via a rope, and the other end of the rope is connected to a counterweight.

[0035] like Figure 1 , Figure 2 As shown, a portion of the overflowing river water flows from top to bottom on the surface of the rubber dam and comes into contact with the drive unit 2. Under the action of the kinetic and potential energy of the river water, the drive unit 2 is driven to rotate around a fixed axis. The power is transmitted to the scrubbing unit 4 through the transmission unit 3, and the scrubbing unit 4 performs scrubbing motion on the surface of the rubber dam.

[0036] like Figure 1 , Figure 5 As shown, the support unit 1 includes a main upright plate 10, traveling wheels 11, traveling wheel brackets 12, adjusting bolts 13, and connecting plates 14. Two main upright plates 10 are arranged symmetrically on the left and right sides and connected by the connecting plates 14. Ropes can be tied to the connecting plates 14, with a counterweight attached to the other end of the rope. Two threaded holes are formed on the main upright plates 10 for connection with the adjusting bolts 13. Guide grooves are formed below the threaded holes, and the traveling wheel brackets 12 are connected within the guide grooves. Traveling wheels 11 are mounted on the traveling wheel brackets 12.

[0037] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the drive unit 2 includes only four impellers 20, arranged symmetrically on the left and right. The impellers 20 are in contact with the overflow river water and rotate under the drive of the overflow river water.

[0038] like Figure 1 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, the transmission unit 3 includes a support guide plate 30, a lower support guide plate 31, a sprocket shaft 32, a sprocket 33, a chain 34, a roller 35, a pin 36, an upper adjusting screw 371, a lower adjusting screw 372, an adjusting nut 38, and a sprocket shaft 39.

[0039] Two support guide plates 30 are provided, symmetrically distributed left and right. One end of each support guide plate 30 is mounted on the main upright plate 10, and a sprocket shaft 32 is mounted on that end. A sprocket shaft 32 is also mounted on the other end, and a lower support guide plate 31 is mounted on each sprocket shaft 32. Each sprocket shaft 32 has two sprockets 33 mounted on it, symmetrically distributed left and right on the sprocket shaft 32. A sprocket shaft 39 is mounted on the other end of the lower support guide plate 31, and two sprockets are mounted on it. There are six sprockets 33, three on each side, symmetrically distributed. One ring of chain 34 is installed on the three sprockets 33 on the left side, and one ring of chain 34 is installed on the three sprockets 33 on the right side. The two rings of chain 34 are arranged symmetrically. Several brush shafts 40 are installed at equal intervals on the chain 34. The two ends of the brush shafts 40 pass through the pin holes on the left and right chains 34 respectively. Rollers 35 are installed at both ends of the brush shafts 40. The diameter of the rollers 35 is slightly smaller than the diameter of the brushes 41. The brushes 41 are installed in the middle of the brush shafts 40.

[0040] One end of the upper adjusting screw 371 is mounted on the pin 36, and the other end is threadedly connected to the adjusting nut 38. One end of the lower adjusting screw 372 is mounted on the sprocket shaft 39, and the other end is threadedly connected to the adjusting nut 38. The threads of the upper adjusting screw 371 and the lower adjusting screw 372 have the same thread size but opposite directions of rotation. The threads at both ends of the adjusting nut 38 have the same thread size but opposite directions of rotation.

[0041] like Figure 1 , Figure 3 , Figure 4 , Figure 6 , Figure 10 As shown, the scrubbing unit includes a brush shaft 40 and a brush 41. The working principle of the technical solution provided by this invention is as follows: First, the device for automatically scrubbing the surface of a rubber dam using water energy is placed on the rubber dam. The support unit 1 is located at the middle of the top of the rubber dam. River water overflowing from the surface of the rubber dam impacts the impeller 20. Under the action of the kinetic and potential energy of the river water, the impeller 20 rotates around the axis of the sprocket shaft 32. Among them, the upper two impellers 20 rotate around the axis of the upper sprocket shaft 32, and the front two impellers 20 rotate around the axis of the front sprocket shaft 32. The two sprocket shafts 32 rotate in the same direction. The sprocket 33 installed on the sprocket shaft 32 is driven by the sprocket shaft 32. The same rotational motion is also performed under the influence of the chain. Two sprockets 33 are mounted on the top sprocket shaft 32, and two more sprockets 33 are mounted on the front sprocket shaft 32. These four sprockets 33 drive two turns of chain 34 to rotate. Under the action of chain 34, the angular velocity and linear velocity of the sprockets 33 are the same. A lower support guide plate 31 is installed at the front end of the support guide plate 30. The lower support guide plate 31 is located below the support guide plate 30. Both ends of the lower support guide plate 31 have round holes, one end of which is connected to the support guide plate 30 via the sprocket shaft 32. That is, the lower support guide plate 31 can rotate around the sprocket shaft 32. A pin 36 is installed at the front end of the plate. One end of the upper adjusting screw 371 is fitted onto the pin 36, and the thread of the other end is connected to the adjusting nut 38. One end of the lower adjusting screw 372 is fitted onto the sprocket shaft, and the thread of the other end is connected to the adjusting nut 38. The upper adjusting screw 371 and the lower adjusting screw 372 are the same in shape and size, only their threads are turned in opposite directions. The threads at both ends of the adjusting nut 38 are the same in size but in opposite directions. This allows the two adjusting screws to move towards each other or away from each other when the adjusting nut is rotated. Under the action of the upper adjusting screw 371 and the lower adjusting screw 372, the sprocket shaft 39 rotates around the axis of the front blade sprocket shaft 32. The chain 34 rotates, thereby adjusting the distance between the sprocket shaft 39 on the lower support guide plate 31 and the lower surface of the front end of the rubber dam. This allows for adjustment of the tightness of the fit between the roller brush 41 supported on the lower support guide plate 31 and the lower surface of the front end of the rubber dam. The ring structure formed by the chain 34 is determined by the cross-sectional shape of the rubber dam surface, the support guide plate 30, the lower support guide plate 31, and the cross-sectional shape of the sprocket 33. The two ends of the ring are semi-circular arcs, the size of which depends on the size of the sprocket 33. The lower part of the ring is determined by the cross-sectional shape and size of the rubber dam, while the upper part of the ring is determined by the outer arc dimensions of the support guide plate 30 and the lower support guide plate 31.Brush shafts 40 are evenly spaced on the chain 34. The diameters of the two ends of the brush shafts 40 are the same as the diameters of the pins on the chain 34, and they are respectively inserted into the pin holes on the coaxial axis of the two chains 34. The length of this diameter section is longer than the length of the pin hole. Rollers 35 are installed on the part of the brush shafts 40 that extends to the outside of the chain 34. The diameter of the middle section of the brush shafts 40 is slightly larger and is used to install the brushes 41. The brush shafts 40 serve as pins on the chain 34 and also serve to install the rollers 35 and brushes 41. During the rotation of the chain 34, the resulting ring is divided into four segments. The two ends are two semicircles, and the remaining two segments are divided into an inner ring (close to or in contact with the rubber dam surface) and an outer ring (away from the rubber dam surface). The two semicircular segments at the ends are supported by the sprockets 33. The inner ring is supported by the rubber dam, and the support point is the contact surface between the bristles of the brush 41 and the rubber dam. The outer ring is supported by the rollers 35, the support guide plate 30, and the lower support guide plate 31. The support point is the contact surface between the roller 35 and the support guide plate 30 and the lower support guide plate 31, thus ensuring that there is no interference during the transmission of the chain 34. The contact surface between the roller brush 41 and the surface of the rubber dam moves continuously with the rotation of the chain 34, that is, there is continuous relative motion between the roller brush 41 and the surface of the rubber dam, thereby realizing the scrubbing of the surface of the rubber dam by the roller brush 41. By adjusting the adjusting bolt 13, the traveling wheel 11 is in contact with the surface of the rubber dam, while the main upright plate 10 is not in contact with the surface of the rubber dam. The device can be moved along the length of the rubber dam. After moving, adjusting the adjusting bolt 13 will cause the traveling wheel 11 to retract upwards, and the main upright plate 10 to contact the surface of the rubber dam, continuing the above scrubbing process. This process is repeated to achieve the scrubbing of the entire surface along the entire length of the rubber dam. The present invention is a water-powered automatic rubber dam surface scrubbing device that realizes the scrubbing function of the rubber dam surface.

[0042] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for automatically scrubbing the surface of a rubber dam using water power, characterized in that: The system comprises four parts: a support unit, a drive unit, a transmission unit, and a scrubbing unit. The support unit is placed on top of the rubber dam. The transmission unit is mounted on the support unit. The drive unit and the scrubbing unit are both mounted on the transmission unit. The transmission unit, drive unit, and scrubbing unit are all located on the side of the rubber dam that needs to be scrubbed. The other side of the rubber dam is in direct contact with the intercepted river water and does not leak out, so it does not need to be scrubbed. On this side, a weight is hoisted to the support unit via ropes. The support unit is connected to the safety rope above the rubber dam via ropes.

2. The device for automatically scrubbing the surface of a rubber dam using water power as described in claim 1, characterized in that: The support unit includes a main upright plate, traveling wheels, traveling wheel brackets, adjusting bolts, and a connecting plate. The support unit has a symmetrical structure, with two main upright plates, one on each side, arranged symmetrically. The bottom surface of each main upright plate contacts the surface of the rubber dam. Two threaded holes are provided on each main upright plate for installing the adjusting bolts. A long groove is provided below the threaded holes, in which the traveling wheel brackets are installed. The traveling wheels are mounted on the traveling wheel brackets. The two main upright plates are connected by the connecting plate.

3. The device for automatically scrubbing the surface of a rubber dam using water power as described in claim 1, characterized in that: The drive unit consists only of impellers, which are arranged symmetrically on both sides, with two impellers on each side. The impellers are mounted on the impeller sprocket shaft.

4. The device for automatically scrubbing the surface of a rubber dam using water power as described in claim 1, characterized in that: The transmission unit includes a support guide plate, a lower support guide plate, a sprocket shaft, a sprocket, a chain, a roller, a pin, an upper adjusting screw, a lower adjusting screw, an adjusting nut, and a sprocket shaft, to achieve power transmission. Two support guide plates are provided, symmetrically arranged on the left and right sides, and respectively installed on the main upright plates on the left and right sides. The blade sprocket shaft is installed at both ends of each support guide plate. Two lower support guide plates are provided, respectively installed on the blade sprocket shaft at the lower end of the two support guide plates. The lower support guide plates can rotate around the blade sprocket shaft. The pin shaft is installed at the lower end of the support guide plate, and the sprocket shaft is installed at the other end of the lower support guide plate. One end of the upper adjusting screw is sleeved on the pin shaft, and the other end is threaded to the adjusting nut. One end of the lower adjusting screw is sleeved on the sprocket shaft, and the other end is threaded to the adjusting nut. The threads on the upper adjusting screw and the lower adjusting screw have the same size but opposite directions of rotation. The threads at both ends of the adjusting nut have the same size but opposite directions of rotation. Each blade sprocket shaft is equipped with two sprockets, which are symmetrically arranged on the blade sprocket shaft (i.e., left-right symmetrical arrangement). The sprockets rotate synchronously with the blade sprocket shaft. A sprocket shaft is also equipped with two sprockets, which are symmetrically arranged on the blade sprocket shaft (i.e., left-right symmetrical arrangement). A sprocket is loosely fitted onto the sprocket shaft, and the two do not rotate synchronously. Two chains are provided, symmetrically arranged left-right. The left chain and the left three sprockets are on the same plane and mesh with each other. The right chain and the right three sprockets are on the same plane and mesh with each other. The two pairs of sprockets on the blade sprocket shaft drive the chain rotation, and the one pair of sprockets on the blade sprocket shaft, together with the two pairs of sprockets on the blade sprocket shaft, support the chain.

5. The device for automatically scrubbing the surface of a rubber dam using water power as described in claim 1, characterized in that: The scrubbing unit includes a roller brush shaft and a roller brush; The roller brush shafts are evenly spaced on the chain. The roller brush shaft structure is symmetrical and divided into 5 sections. The middle section is centrally located and houses the roller brush. The remaining 4 sections have the same diameter as the chain pin. The two sections immediately adjacent to the middle section are for mating with the chain pin holes. The two sections at the very ends are for mounting the rollers. The diameter of the rollers is slightly smaller than that of the roller brush. When the roller brush is in contact with the surface of the rubber dam, the rollers are not in contact with the surface of the rubber dam. When the roller brush is located on the outer ring of the rotating chain, the rollers are in contact with the outer ring of the support guide plate and the lower support guide plate, and the roller brush is suspended. The rollers also support the chain, ensuring that the chain and the roller brush rotate in an orderly manner during rotation. The chain, the roller brush, and the roller brush shaft on the outer ring (away from the surface of the rubber dam) will not clump together with the chain, the roller brush, the roller brush shaft, and the blade sprocket shaft on the inner ring (close to or in contact with the surface of the rubber dam) under the influence of gravity. The roller brush shaft is mounted on the chain, and the roller brush is mounted on the middle part of the roller brush shaft and is symmetrical from left to right. The roller brush is in direct contact with the rubber dam and moves unidirectionally relative to the surface of the rubber dam to clean the surface of the rubber dam.

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