A single row of tooth drag head suitable for digging clay, a dredger and a method

Abstract

The application discloses a single-row tooth rake head suitable for digging clay, a dredger and a method, and belongs to the technical field of dredgers. The single-row tooth rake head suitable for digging clay comprises a rake body, further comprises: a movable cover which is hingedly arranged on the front side of the rake body and is provided with a hydraulic oil cylinder between the movable cover and the rake body; a water flushing assembly which is arranged on the rake body and is used for cutting and flushing clay; a grid assembly which comprises a first grid and a second grid, the first grid is arranged on the rake body, and the second grid is arranged in the movable cover and is used for intercepting large pieces of clay; and a single-row rake tooth which is fixedly arranged at the front end of the movable cover through a tooth seat and is used for cutting into and crushing clay. The single-row rake tooth can effectively crush the clay layer, effectively avoid clay adhesion, reduce downtime, is suitable for clay digging operation scenes such as channel dredging and water conservancy engineering, and can effectively improve the clay digging efficiency and effect.

Description

Technical Field

[0001] This invention relates to the field of dredging technology, and more particularly to a single-row toothed rake head, a dredging vessel, and a method suitable for dredging clay. Background Technology

[0002] The rake head is one of the main dredging equipment of a trailing suction dredger. It is installed at the lower end of the suction pipe. During dredging operations, the rake head is close to the mud surface at the bottom of the water. Under the towing of the ship, the soil is loosened and the mud is dug. Then, the mud pump sucks in the mud and water together and discharges it into the mud tank, or it can be dumped at the same time to achieve the purpose of dredging.

[0003] The scraper head, a core component of trailing suction hopper dredgers, is used for underwater excavation. Clay excavation presents numerous challenges in dredging projects. Current scraper head efficiency has significant room for improvement, and its service life is significantly shortened due to the characteristics of hard clay. Traditional scraper heads suffer from problems such as an unreasonable high-pressure water jet layout, insufficient clay breaking, high excavation resistance, and poor compatibility between the scraper head and clay, leading to low excavation efficiency and high energy consumption. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a single-row toothed rake head, dredger and method suitable for dredging clay.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A single-row toothed rake head suitable for digging clay includes the rake body and also includes:

[0007] A movable cover is hinged to the front side of the rake body, and a hydraulic cylinder is provided between the movable cover and the rake body;

[0008] A flushing assembly, which is mounted on the rake body, is used to cut and flush the clay.

[0009] A grid assembly, comprising a first grid and a second grid, wherein the first grid is disposed on the rake body and the second grid is disposed inside a movable cover for intercepting large pieces of clay;

[0010] A single row of rake teeth, which are fixed to the front end of the movable cover by tooth bases, are used to cut into and break up clay.

[0011] The movable cover is equipped with an anti-adhesion component for cleaning clay from the single row of rake teeth.

[0012] Preferably, the rake body includes a first rake body and a second rake body, and a connecting flange is provided between the first rake body and the second rake body. The flushing assembly includes a high-pressure flushing pipeline provided on the second rake body and a plurality of flushing nozzles connected to the high-pressure flushing pipeline. The flushing nozzles are provided at the root of a single row of rake teeth. The end of the high-pressure flushing pipeline away from the flushing nozzles is connected to a high-pressure water pump.

[0013] Preferably, the anti-adhesion assembly includes a protective shell fixed to the outside of the movable cover, a rotating rod rotatably connected between the protective shell and the movable cover, a sleeve threadedly connected to the rotating rod, a sleeve fixedly connected to the sleeve, a first pull rope equidistantly arranged along the axial direction of the sleeve, and a ball bearing connected to the end of the first pull rope away from the sleeve. The ball bearing is movably disposed within a single row of rake teeth. The protective shell is also provided with a drive motor for driving the rotating rod to rotate.

[0014] Preferably, the rotating rod includes a short rod rotatably connected to the protective shell, an eccentric rod fixedly connected to the short rod, and a long rod fixedly connected to the eccentric rod. The long rod and the short rod are coaxially arranged, the sleeve is slidably connected to the outside of the long rod, and the long rod is provided with a reciprocating screw section that is threadedly connected to the sleeve.

[0015] Preferably, a rotating shaft is rotatably connected between the protective shell and the movable cover, an eccentric shaft is fixed on the rotating shaft, a movable tube is slidably connected to the outside of the eccentric shaft, a telescopic plate is movably hinged between the movable tube and the sleeve, and a second pull rope connected to the first pull rope is provided on the movable tube.

[0016] Preferably, a transmission component is provided inside the protective shell between the rotating shaft and the rotating rod, and the transmission component is one of a gear transmission component, a chain transmission component, or a synchronous belt transmission component.

[0017] Preferably, a collar is rotatably mounted on the eccentric rod, and a swing rod is fixedly mounted on the collar. A connecting rod is movably connected to the end of the swing rod away from the collar, and a movable rod rotatably mounted inside the protective shell is connected to the end of the connecting rod away from the swing rod. Several bulldozer plates are mounted on the movable rod and slidably connected to the movable cover. Each bulldozer plate is positioned between two adjacent rake teeth in a single row of rake teeth.

[0018] Preferably, the spacing between two adjacent rake teeth in the single row is 176mm, the tip of each rake tooth adopts a triangular pyramid structure, and the thickness of each rake tooth is gradually changed, with a thickness of 133mm at the root and 5mm at the end.

[0019] A dredger includes a single-row toothed rake head suitable for dredging clay, as described above, and also includes a hull and a rake pipe disposed on the side of the hull. The discharge port of the first rake head is connected to the inlet of the rake pipe, and the first rake head and the rake pipe are connected by a flange.

[0020] The present invention also discloses a method for using the aforementioned single-row toothed rake head suitable for digging clay, which further includes the following steps:

[0021] S1: After the dredging vessel is in position, the rake head is lowered to the seabed. The vessel's towing cables and the rake head jack are adjusted to ensure that the rake head is in stable contact with the mud surface.

[0022] Turn on the high-pressure water pump on the ship and supply water to the flush nozzle through the flushing pipe to pre-loosen the clay in front of the end of the single row of rake teeth.

[0023] S2: Control the hydraulic cylinder to extend, push the movable cover and cause it to drive the triangular pyramidal tooth tips of the single row of rake teeth to cut into the clay layer at an appropriate angle. The ship starts to move forward at low speed to carry out dredging operations. The single row of rake teeth plows and turns over the clay layer to form loose mud.

[0024] Control the dredging vessel's mud pump to suck in the mud-water mixture through the suction port protected by the first and second grids, which intercept oversized obstacles;

[0025] S3: Start the anti-adhesion component and activate the drive motor to provide initial rotational power;

[0026] The rotating rod rotates, and the reciprocating screw section on it converts the rotational motion into the axial reciprocating linear motion of the sleeve and the casing. The casing pulls all the first pull ropes, so that the first pull ropes perform reciprocating scraping motion relative to the single row of rake teeth to remove excess clay from the tooth surface.

[0027] S4: When the sleeve moves axially along the rotating rod, the telescopic plate drives the moving tube to reciprocate along the eccentric shaft.

[0028] The rotating rod drives the rotating shaft and eccentric shaft to rotate through the transmission component. The eccentric shaft drives the second pull rope to move through the moving tube, so that the second pull rope adds high-frequency, irregular vibration to the first pull rope, causing the first pull rope to shake violently while scraping, effectively preventing clay from sticking to the pull rope itself.

[0029] S5: When the eccentric section of the rotating rod rotates, it drives the collar and the swing rod to swing. The reciprocating swing of the connecting rod is converted into the reciprocating rotation of the movable rod. The movable rod drives multiple bulldozers to swing back and forth in the gap between the rake teeth, pushing the clay accumulated at the root of the teeth to the position where the first pull rope can cut off the clay, and assisting the pull rope in cleaning.

[0030] Compared with the prior art, the present invention provides a single-row toothed rake head, dredger and method suitable for dredging clay, which has the following beneficial effects:

[0031] 1. In this invention, by setting up an anti-adhesion component and starting the drive motor to provide initial rotational power, the rotating rod rotates, and the reciprocating screw section on it converts the rotational motion into the axial reciprocating linear motion of the sleeve and casing. The casing pulls all the first pull ropes, causing the first pull ropes to perform reciprocating scraping motion relative to the single row of rake teeth, removing excessive clay from the tooth surface. This prevents the sharpness of the tooth tips from disappearing after the clay thickly covers the rake teeth, and changes the contact with the soil layer from a "point" or "line" to a "surface", so that the rake teeth cannot effectively cut into the soil layer, but instead "slide" or "compress" on the soil surface. This solves the problem of reduced rake tooth crushing efficiency and effectively improves the efficiency and effect of clay excavation.

[0032] 2. In this invention, when the rotating rod rotates, the rotating rod drives the rotating shaft and the eccentric shaft to rotate through the transmission component. The eccentric shaft drives the second pull rope to move through the moving tube, so that the second pull rope adds high-frequency, irregular vibration to the first pull rope, causing the first pull rope to vibrate violently while scraping, effectively preventing clay from sticking to the pull rope itself, and further ensuring the digging effect and digging efficiency of the rake teeth.

[0033] 3. In this invention, when the eccentric section of the rotating rod rotates, it drives the collar and the swing rod to swing. The reciprocating swing of the connecting rod is converted into the reciprocating rotation of the movable rod. The movable rod drives multiple bulldozers to swing back and forth in the gap between the rake teeth, pushing the clay accumulated at the root of the teeth to the position where the first pull rope can cut off the clay, assisting the pull rope in cleaning, and ensuring that the rake teeth are always in a clean and efficient working state.

[0034] 4. In this invention, by providing a high-pressure water jet inside the movable cover, the high-pressure water jet reduces the surface adhesion of the clay, making it less likely for the clay to stick to the rake body, thereby reducing the chance of rake blockage. At the same time, it can also disperse large pieces of clay in some areas to prevent blockage of the grid. Furthermore, a grid is also provided inside the movable cover, so even if the rake head is blocked by clay, the amount of blocking clay can be reduced, shortening the cleaning time. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the external structure of the rake body of the present invention. Figure 1 ;

[0036] Figure 2 This is a schematic diagram of the external structure of the rake body of the present invention. Figure 2 ;

[0037] Figure 3 This is a partial cross-sectional structural diagram of the rake body of the present invention;

[0038] Figure 4 This is a structural diagram showing the separation of the first and second rake bodies of the present invention;

[0039] Figure 5This is a cross-sectional structural diagram of the movable cover of the present invention;

[0040] Figure 6 for Figure 5 Enlarged structural diagram of section A in the middle;

[0041] Figure 7 This is a schematic diagram of the internal structure of the movable cover of the present invention;

[0042] Figure 8 This is a schematic diagram of the external structure of the rotating rod of the present invention;

[0043] Figure 9 This is a schematic diagram of the sleeve and moving tube of the present invention;

[0044] Figure 10 This is a schematic diagram of the structure of the rotating rod and rotating shaft of the present invention;

[0045] Figure 11 This is a cross-sectional structural diagram of the sleeve of the present invention.

[0046] In the diagram: 1. Rake body; 101. First rake body; 102. Second rake body; 2. Movable cover; 3. Hydraulic cylinder; 4. First grid; 5. Second grid; 6. Single row of rake teeth; 7. High-pressure water flushing pipeline; 8. Protective shell; 9. Rotating rod; 9011. Short rod; 9012. Eccentric rod; 9013. Long rod; 9014. Reciprocating screw section; 901. Sleeve; 902. Sleeve tube; 903. First pull rope; 904. Ball bearing; 10. Drive motor; 11. Rotating shaft; 111. Eccentric shaft; 112. Moving tube; 113. Telescopic plate; 114. Second pull rope; 12. Collar; 121. Swing rod; 122. Connecting rod; 123. Movable rod; 124. Bulldozer blade; 13. Rake tube; 14. Transmission components. Detailed Implementation

[0047] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0048] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be 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.

[0050] like Figures 1 to 5 As shown, this embodiment proposes a single-row toothed rake head suitable for digging clay, including a rake body 1, and further including: a movable cover 2, a water flushing assembly, a grid assembly, and a single row of rake teeth 6; the movable cover 2 is hinged to the front side of the rake body 1, and a hydraulic cylinder 3 is provided between the movable cover 2 and the rake body 1; the water flushing assembly is provided on the rake body 1 and is used to cut and flush the clay. The high-pressure water flushing reduces the surface adhesion of the clay, making it less likely to stick to the rake body 1, thereby reducing the probability of rake blockage. At the same time, it can also disperse large pieces of clay in some areas to prevent grid blockage; the grid assembly includes a first grid. 4 and 5. The first grid 4 is set on the rake body 1, and the second grid 5 is set inside the movable cover 2. The use of grid inside the movable cover 2 can reduce the amount of clay clogging the rake body 1 and shorten the cleaning time, even if the rake body 1 is blocked by clay. The single row of rake teeth 6 is fixed to the front end of the movable cover 2 by tooth seat and is used to cut and break the clay. The movable cover 2 is equipped with an anti-adhesion component for cleaning the clay on the single row of rake teeth 6. The inner lining of the movable cover 2 is lined with a 10mm thick wear-resistant plate, which can extend the overall service life of the rake head and achieve the purpose of saving costs and improving construction efficiency.

[0051] Specifically, after the dredging vessel is in position, the rake head is lowered to the seabed. The towing cables and rake head jacks are adjusted to ensure stable contact between the rake head and the mud surface. Based on the dredging depth and rake arm posture, the hydraulic cylinder 3 is extended, pushing the movable cover 2 and causing it to drive the triangular pyramidal tips of the single-row rake teeth 6 to cut into the clay layer at an appropriate angle. The vessel begins to move forward at low speed to carry out dredging operations. The single-row rake teeth 6 plow and turn over the clay layer, forming loose mud clods. The dredging vessel's mud pump is then activated, drawing the mud-water mixture into the suction port protected by the first grid 4 and the second grid 5. The grids can intercept excess mud. Large obstacles; during single-row rake tooth 6 excavation, the anti-adhesion component is activated to remove excessive clay from the tooth surface, preventing the rake teeth from losing their sharpness after being thickly covered with clay. The contact with the soil layer changes from a "point" or "line" to a "surface", making the rake teeth unable to effectively cut into the soil layer, but instead "sliding" or "compressing" on the soil surface. This solves the problem of reduced rake tooth crushing efficiency and effectively improves the efficiency and effect of clay excavation. Reducing clay adhesion means reducing abnormal load and wear caused by blockage, and extending the service life of components such as rake teeth and movable cover 2.

[0052] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in a preferred embodiment, based on the above method, the rake body 1 further includes a first rake body 101 and a second rake body 102, with a connecting flange between the first rake body 101 and the second rake body 102. The flushing assembly includes a high-pressure flushing pipeline 7 installed on the second rake body 102 and several flushing nozzles connected to the high-pressure flushing pipeline 7. The flushing nozzles are located at the root of the single-row rake teeth 6. The end of the high-pressure flushing pipeline 7 away from the flushing nozzles is connected to a high-pressure water pump, which is installed on the hull and uses a high-power high-pressure water pump. When the flushing assembly is running, the high-pressure water pump on the ship is turned on, and water is supplied to the flushing nozzles through the high-pressure flushing pipeline 7 to pre-loosen the clay in front of the end of the single-row rake teeth 6. The high-pressure flushing reduces the surface adhesion of the clay, making it less likely to stick to the rake head structure, thereby reducing the probability of rake blockage. At the same time, it can also disperse large pieces of clay in some areas to prevent blockage of the grid.

[0053] like Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11As shown, in a preferred embodiment, based on the above method, the anti-adhesion component further includes a protective shell 8 fixed to the outside of the movable cover 2, a rotating rod 9 rotatably connected between the protective shell 8 and the movable cover 2, a sleeve 901 threadedly connected to the rotating rod 9, a sleeve 902 fixedly connected to the sleeve 901, a first pull rope 903 equidistantly arranged along the axial direction of the sleeve 902, and a ball bearing 904 connected to the end of the first pull rope 903 away from the sleeve 902. The ball bearing 904 is movably disposed in the single row of rake teeth 6. A drive motor 10 for driving the rotating rod 9 to rotate is also provided in the protective shell 8.

[0054] Specifically, when the anti-adhesion component is working, the drive motor 10 is started to provide initial rotational power, the rotating rod 9 rotates, and the rotating rod 9 is threaded with the sleeve 901, converting the rotational motion into the axial reciprocating linear motion of the sleeve 901 and the sleeve 902. The sleeve 902 pulls all the first pull ropes 903, so that the first pull ropes 903 reciprocate and scrape relative to the single row of rake teeth 6 with the ball 904 as the center, removing excess clay from the tooth surface. It should be noted that the first pull ropes 903 are not taut to accommodate the left and right swing of the sleeve 902. When the first pull ropes 903 swing left and right, they will not come into contact with the outer wall of the rake teeth to avoid excessive wear from contact with the rake teeth. The first pull ropes 903 only cut off the clay on the outer side of the rake teeth that exceeds a certain thickness. The first pull ropes 903 should be made of wear-resistant and corrosion-resistant materials.

[0055] like Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, in a preferred embodiment, based on the above method, the rotating rod 9 further includes a short rod 9011 rotatably connected to the protective shell 8, an eccentric rod 9012 fixedly connected to the short rod 9011, and a long rod 9013 fixedly connected to the eccentric rod 9012. The short rod 9011 is connected to the output shaft of the drive motor 10, the long rod 9013 is coaxially arranged with the short rod 9011, the sleeve 902 is slidably connected to the outside of the long rod 9013, and the long rod 9013 is provided with a reciprocating screw section 9014 that is threadedly connected to the sleeve 901.

[0056] Furthermore, a rotating shaft 11 is rotatably connected between the protective shell 8 and the movable cover 2. An eccentric shaft 111 is fixed on the rotating shaft 11. A movable tube 112 is slidably connected to the outside of the eccentric shaft 111. A telescopic plate 113 is movably hinged between the movable tube 112 and the sleeve 902. A second pull rope 114 connected to the first pull rope 903 is provided on the movable tube 112.

[0057] Furthermore, a transmission component 14 is provided inside the protective shell 8 between the rotating shaft 11 and the rotating rod 9. The transmission component 14 is one of a gear transmission part, a chain transmission part, or a synchronous belt transmission part. The transmission component 14 adopts existing technology and is used to drive the two rods or shafts to rotate simultaneously. Further details will not be provided here.

[0058] Specifically, when the sleeve 902 moves axially along the rotating rod 9, it drives the moving tube 112 to reciprocate along the eccentric shaft 111 via the telescopic plate 113. The rotating rod 9 drives the rotating shaft 11 and the eccentric shaft 111 to rotate via the transmission component 14. The eccentric shaft 111 drives the second pull rope 114 to move via the moving tube 112, causing the second pull rope 114 to add high-frequency, irregular vibration to the first pull rope 903. This causes the first pull rope 903 to vibrate violently while scraping the clay on the outside of the rake teeth, effectively preventing the clay from sticking to the pull rope itself. This fundamentally solves the adhesion problem and is more direct and reliable than simply relying on high-pressure water flushing. It ensures that the rake teeth are always in a clean and efficient working state, guaranteeing the digging effect of the rake teeth on the clay.

[0059] like Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 10 As shown, in a preferred embodiment, based on the above method, a collar 12 is rotatably provided on the eccentric rod 9012, a swing rod 121 is fixed on the collar 12, a connecting rod 122 is movably connected to the end of the swing rod 121 away from the collar 12, and a movable rod 123 is rotatably provided inside the protective shell 8 at the end of the connecting rod 122 away from the swing rod 121. A plurality of bulldozer plates 124 are provided on the movable rod 123 and slidably connected to the movable cover 2. Each bulldozer plate 124 is placed between two adjacent rake teeth of the single row of rake teeth 6.

[0060] Specifically, when the eccentric rod 9012 of the rotating rod 9 rotates, it drives the collar 12 and the swing rod 121 to swing. The reciprocating swing of the connecting rod 122 is converted into the reciprocating rotation of the movable rod 123. The movable rod 123 drives multiple bulldozer plates 124 to swing back and forth in the gap between the rake teeth, pushing the clay accumulated at the root of the teeth to the position where the first pull rope 903 can cut off the clay. This assists the pull rope in cleaning, ensuring that the rake teeth are always in a clean and efficient working state, solving the problem of reduced rake tooth crushing efficiency, and effectively improving the efficiency and effect of clay excavation.

[0061] like Figure 2 , Figure 6 and Figure 8As shown, in a preferred embodiment, based on the above method, the spacing between two adjacent rake teeth in a single row of rake teeth 6 is 176mm, the tip of each rake tooth adopts a triangular pyramid structure, and the thickness of each rake tooth body is gradually changed, with a thickness of 133mm at the root and 5mm at the end; the triangular pyramid tip of the single row of teeth uses the pressure concentration effect to break up clay blocks.

[0062] The present invention also discloses a dredger, including the aforementioned single-row toothed rake head suitable for dredging clay, and also includes a hull and a rake pipe 13 disposed on the side of the hull. The discharge port of the first rake body 101 is connected to the inlet of the rake pipe 13, and the first rake body 101 and the rake pipe 13 are connected by a flange. The clay extracted by the rake head enters the mud chamber of the hull through the rake pipe 13.

[0063] This invention also discloses a method for using a single-row toothed rake head suitable for digging clay, which includes the following steps:

[0064] S1: After the dredging vessel is in position, the rake head is lowered to the seabed. The vessel's towing cables and the rake head jack are adjusted to ensure that the rake head is in stable contact with the mud surface.

[0065] Turn on the high-pressure water pump on the ship and supply water to the flushing nozzle through the high-pressure flushing pipe 7 to pre-loosen the clay in front of the end of the single row of rake teeth 6.

[0066] S2: Control the hydraulic cylinder 3 to extend, push the movable cover 2 and make it drive the triangular pyramidal tooth tip of the single row of rake teeth 6 to cut into the clay layer at an appropriate angle. The ship starts to move forward at low speed to carry out dredging operations. The single row of rake teeth 6 plows and turns up the clay layer to form loose mud.

[0067] The dredging vessel's mud pump is controlled to suck in the mud-water mixture through the suction port protected by the first grid 4 and the second grid 5, which intercept oversized obstacles.

[0068] S3: Start the anti-adhesion component to work, start the drive motor 10, and provide initial rotational power;

[0069] Rotating rod 9 rotates, and the reciprocating screw section 9014 on it converts the rotational motion into the axial reciprocating linear motion of sleeve 901 and sleeve 902. Sleeve 902 pulls all the first pull ropes 903, so that the first pull ropes 903 perform reciprocating scraping motion relative to the single row of rake teeth 6 to remove excess clay from the tooth surface.

[0070] S4: When the sleeve 902 moves along the axis of the rotating rod 9, it drives the moving tube 112 to reciprocate along the eccentric shaft 111 via the telescopic plate 113.

[0071] The rotating rod 9 drives the rotating shaft 11 and the eccentric shaft 111 to rotate through the transmission component 14. The eccentric shaft 111 drives the second pull rope 114 to move through the moving tube 112, so that the second pull rope 114 adds high-frequency, irregular vibration to the first pull rope 903, causing the first pull rope 903 to vibrate violently while scraping, effectively preventing clay from sticking to the pull rope itself.

[0072] S5: When the eccentric rod 9012 of the rotating rod 9 rotates, it drives the collar 12 and the swing rod 121 to swing. The reciprocating swing of the connecting rod 122 is converted into the reciprocating rotation of the movable rod 123. The movable rod 123 drives multiple bulldozer plates 124 to swing back and forth in the gap between the rake teeth, pushing the clay accumulated at the root of the teeth to the position where the first pull rope 903 can cut off the clay, and assisting the pull rope in cleaning.

[0073] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0074] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A single-row toothed rake head suitable for digging clay, comprising a rake body (1), characterized in that, Also includes: A movable cover (2) is hinged to the front side of the rake body (1), and a hydraulic cylinder (3) is provided between the movable cover (2) and the rake body (1). A flushing assembly is provided on the rake body (1) for cutting and flushing clay; A grid assembly, comprising a first grid (4) and a second grid (5), wherein the first grid (4) is disposed on the rake body (1) and the second grid (5) is disposed inside the movable cover (2) for intercepting large pieces of clay; A single row of rake teeth (6) is fixed to the front end of the movable cover (2) by a tooth seat and is used to cut into and break clay. The movable cover (2) is equipped with an anti-adhesion component for cleaning the clay on the single row of rake teeth (6); The anti-adhesion assembly includes a protective shell (8) fixed to the outside of the movable cover (2), a rotating rod (9) rotatably connected between the protective shell (8) and the movable cover (2), a sleeve (901) threadedly connected to the rotating rod (9), a sleeve (902) fixedly connected to the sleeve (901), a first pull rope (903) equidistantly arranged along the axial direction of the sleeve (902), and a ball (904) connected to the end of the first pull rope (903) away from the sleeve (902). The ball (904) is movably arranged in a single row of rake teeth (6). The protective shell (8) is also provided with a drive motor (10) for driving the rotating rod (9) to rotate. The rotating rod (9) includes a short rod (9011) rotatably connected to the protective shell (8), an eccentric rod (9012) fixedly connected to the short rod (9011), and a long rod (9013) fixedly connected to the eccentric rod (9012). The long rod (9013) is coaxially arranged with the short rod (9011). The sleeve (902) is slidably connected to the outside of the long rod (9013). The long rod (9013) is provided with a reciprocating screw section (9014) that is threadedly connected to the sleeve (901). A rotating shaft (11) is rotatably connected between the protective shell (8) and the movable cover (2). An eccentric shaft (111) is fixed on the rotating shaft (11). A movable tube (112) is slidably connected to the outside of the eccentric shaft (111). A telescopic plate (113) is movably hinged between the movable tube (112) and the sleeve (902). A second pull rope (114) connected to the first pull rope (903) is provided on the movable tube (112).

2. A single-row toothed rake head suitable for digging clay according to claim 1, characterized in that, The rake body (1) includes a first rake body (101) and a second rake body (102). A connecting flange is provided between the first rake body (101) and the second rake body (102). The flushing assembly includes a high-pressure flushing pipeline (7) provided on the second rake body (102) and a plurality of flushing nozzles connected to the high-pressure flushing pipeline (7). The flushing nozzles are provided at the root of the single row of rake teeth (6). The end of the high-pressure flushing pipeline (7) away from the flushing nozzles is connected to a high-pressure water pump.

3. A single-row toothed rake head suitable for digging clay according to claim 2, characterized in that, Inside the protective shell (8), a transmission component (14) is provided between the rotating shaft (11) and the rotating rod (9). The transmission component (14) is one of a gear transmission component, a chain transmission component, or a synchronous belt transmission component.

4. A single-row toothed rake head suitable for digging clay according to claim 3, characterized in that, A collar (12) is rotatably mounted on the eccentric rod (9012). A swing rod (121) is fixed on the collar (12). A connecting rod (122) is movably connected to one end of the swing rod (121) away from the collar (12). A movable rod (123) is rotatably mounted inside the protective shell (8) to one end of the connecting rod (122) away from the swing rod (121). Several bulldozer plates (124) are slidably connected to the movable cover (2) on the movable rod (123). Each bulldozer plate (124) is placed between two adjacent rake teeth of a single row of rake teeth (6).

5. A single-row toothed rake head suitable for digging clay according to claim 4, characterized in that, The distance between two adjacent rake teeth in the single row (6) is 176mm. The tip of each rake tooth adopts a triangular pyramid structure. The thickness of each rake tooth is gradually changed, with a thickness of 133mm at the root and 5mm at the end.

6. A dredger, comprising a single-row toothed rake head suitable for dredging clay as described in claim 5, characterized in that, It also includes the hull and a rake tube (13) disposed on the side of the hull. The discharge port of the first rake body (101) is connected to the feed port of the rake tube (13), and the first rake body (101) and the rake tube (13) are connected by a flange.

7. A method of using the dredger according to claim 6, characterized in that, It also includes the following steps: S1: After the dredger is in place, the rake head is lowered to the seabed. The towing cable and rake head frame of the vessel are adjusted to ensure that the rake head is in stable contact with the mud surface. Turn on the high-pressure water pump on the ship and supply water to the flush nozzle through the high-pressure flushing pipeline (7) to pre-loosen the clay in front of the end of the single row of rake teeth (6); S2: Control the hydraulic cylinder (3) to extend, push the movable cover (2) and make it drive the triangular pyramidal tooth tip of the single row rake tooth (6) to cut into the clay layer at an appropriate angle. The ship starts to move forward at low speed to carry out dredging operations. The single row rake tooth (6) plows and turns up the clay layer to form loose mud. Control the operation of the dredger's mud pump to suck in the mud-water mixture through the suction port protected by the first grid (4) and the second grid (5), and the grid intercepts oversized obstacles; S3: Start the anti-adhesion component and start the drive motor (10) to provide initial rotational power; The rotating rod (9) rotates, and the reciprocating screw section (9014) on it converts the rotational motion into the axial reciprocating linear motion of the sleeve (901) and the bushing (902). The bushing (902) pulls all the first pull ropes (903), so that the first pull ropes (903) perform reciprocating scraping motion relative to the single row of rake teeth (6) to remove excess clay from the tooth surface. S4: When the sleeve (902) moves axially along the rotating rod (9), it drives the moving tube (112) to reciprocate along the eccentric shaft (111) through the telescopic plate (113); The rotating rod (9) drives the rotating shaft (11) and the eccentric shaft (111) to rotate through the transmission component (14). The eccentric shaft (111) drives the second pull rope (114) to move through the moving tube (112), so that the second pull rope (114) adds high-frequency, irregular vibration to the first pull rope (903), causing the first pull rope (903) to vibrate violently while scraping, effectively preventing clay from sticking to the pull rope itself. S5: When the eccentric rod (9012) of the rotating rod (9) rotates, it drives the collar (12) and the swing rod (121) to swing. The reciprocating swing of the connecting rod (122) is converted into the reciprocating rotation of the movable rod (123). The movable rod (123) drives multiple bulldozers (124) to swing back and forth in the gap between the rake teeth, pushing the clay accumulated at the root of the teeth to the position where the first pull rope (903) can cut off the clay, and assisting the pull rope in cleaning.

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