Three-arm type hinge suction dredger hinge head and using method

Abstract

The invention discloses a three-arm type hinge suction dredger hinge head and a using method. According to the technical scheme, the three-arm type hinge suction dredger hinge head comprises a large ring and a hub, the large ring is fixedly connected with the hub through three sets of cutter arms, a conical head is arranged at the top of the hub, a plurality of cutter teeth are arranged on the outer side edges of the cutter arms, a plurality of circumferential teeth are arranged on the outer side of the large ring, and a hinge head support is arranged on the lower side of the large ring. The invention has the following beneficial effects: (1) by reducing the number of the cutter arms and increasing the width of the cutter arms and the distance between the cutter arms, the resistance of the reaming head for rotary cutting of sludge can be reduced, the passing rate of vegetation is increased, and vegetation winding is reduced; (2) the circumferential teeth are arranged on the large ring, so that the ground breaking capacity of the reaming head is improved, and the resistance of the cutter arm to rotationally cut sludge is further reduced; and (3) a grating cover is arranged outside the large ring, so that the probability that the vegetation winds the hinge head is further reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of reservoir dredging equipment, and in particular relates to a three-arm type dredging vessel dredging head and a use method thereof. Background Art

[0002] Underwater dredging usually adopts grab dredging, pump suction dredging, ordinary cutter suction dredging, bucket wheel dredging and other dredging methods. The application of cutter suction dredging is relatively mature, especially in coastal areas with abundant waters. The silt in these areas generally has the characteristics of loose texture, low sand and gravel content, and little change in geological conditions. The cutter suction dredging method has played a high dredging efficiency. In the dredging construction of reservoirs in cold and arid areas, when the conventional cutter suction dredging technology is directly introduced, due to the special hydrogeological conditions and construction conditions in the region, the reservoir silt has the characteristics of complex sedimentation components such as multiple rock layers, hard texture, relatively high density, and high sand and gravel content. At the same time, the vegetation is lush, the roots are thick, and the toughness is high. Conventional cutter suction dredging equipment, especially the cutter suction ship, is easily entangled by vegetation, and the soil breaking ability is weakened. It cannot operate efficiently. It takes a lot of time to clean the cutter head, resulting in low dredging efficiency and high cost of cutter suction dredging, and at the same time, it causes a large waste of resources. Summary of the invention

[0003] In view of the problem that the dredging head in the above-mentioned prior art is easily entangled by vegetation, the soil breaking ability is weakened, and it cannot operate efficiently, and a lot of time is needed to clean the dredging head, resulting in low dredging efficiency and high cost of dredging by suction, as well as a large waste of resources, the present invention provides a dredging head of a three-arm dredging vessel, and its technical solution is: it comprises a large ring and a hub, the large ring is fixedly connected to the hub through three groups of knife arms, a cone head is arranged on the top of the hub, a plurality of knife teeth are arranged on the outer edge of the knife arm, a plurality of circumferential teeth are arranged on the outer side of the large ring, and a dredging head bracket is arranged on the lower side of the large ring.

[0004] As a preferred solution, the large ring is rotatably connected to the hinge bracket, and an ear seat is fixedly provided on the side wall of the hinge bracket, and the ear seat is fixedly connected to the ear plate on the grille cover by bolts.

[0005] As a preferred solution, tie bars are provided between the upper and lower parts of the grille cover.

[0006] As a preferred solution, the blade arm is a spiral structure, the bottom width of the blade arm is B, the value range of B is 450-550mm, and the top width is b, the value range of b is 190-230mm.

[0007] As a preferred solution, the radius of curvature of the blade arm is 200-1050 mm, the wrap angle is γ, and the value range of γ is 70-72°.

[0008] As a preferred solution, the opening between the blade arms is W, and the value range of W is 280-320 mm.

[0009] As a preferred solution, the maximum thickness of the knife arm is 60 mm.

[0010] As a preferred solution, the angle between the circumferential teeth and the large ring is θ, the value range of θ is 30-40°, and the arrangement direction is the same as that of the knife teeth.

[0011] The present invention also provides a method for using a three-arm type dredging vessel dredging head, comprising the following steps: S1: Install the hinge head bracket on the mud suction pipe of the hinge suction vessel, and connect the transmission shaft with the wheel hub; S2: Start to break the silt layer and suck the mud. The cone head and the blade teeth break the hard silt layer rock and soil. The circumferential teeth assist in breaking the soil, and then the soil enters the mud suction pipe through the gap between the blade teeth. The vegetation in the rock and soil is also cut and broken by the blade teeth and enters the mud suction pipe. The grille cover prevents the vegetation above the hinge head from wrapping around the hinge head. Beneficial effects of the present invention: (1) By reducing the number of blade arms and increasing the width of the blade arms and the distance between the blade arms, the resistance of the rotary cutting head to silt can be reduced, the passing rate of vegetation can be increased, and vegetation entanglement can be reduced; (2) Circumferential teeth are arranged on the large ring, and a specific angle is set between the circumferential teeth and the large ring, which increases the soil breaking ability of the reamer and further reduces the resistance of the cutter arm to rotary cutting of silt; (3) A grille cover is installed outside the large ring to further reduce the probability of vegetation entangled in the hinge head. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0013] Figure 2 It is a schematic diagram of the overall structure of the grille-free cover of the present invention.

[0014] Figure 3 It is an overall front view of the present invention.

[0015] Figure 4 It is a schematic diagram of the overall structure of the grille cover in the present invention.

[0016] Figure 5 It is a schematic diagram of the first parameter in the present invention.

[0017] Figure 6 It is a schematic diagram of the second parameter in the present invention.

[0018] Figure 7 It is a schematic diagram of the third parameter in the present invention.

[0019] In the figure: 1, large ring; 2, wheel hub; 3, knife arm; 4, cone head; 5, knife teeth; 6, circumferential teeth; 7, hinge head bracket; 8, ear seat; 9, grille cover; 10, tie rod; 11, bolt; 12, ear plate. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below based on the accompanying drawings and specific embodiments.

[0021] Example like Figure 1-4 The illustrated embodiment shows a three-arm reamer suction dredging ship reamer, comprising a large ring 1 and a hub 2. The large ring 1 is fixedly connected to the hub 2 via three sets of cutter arms 3. A cone head 4 is provided on the top of the hub 2. A plurality of cutter teeth 5 are provided on the outer edge of the cutter arms 3. A plurality of circumferential teeth 6 are provided on the outer side of the large ring 1. A reamer bracket 7 is provided on the lower side of the large ring 1.

[0022] Furthermore, the large ring 1 is rotatably connected to the hinge bracket 7 , and an ear seat 8 is fixedly provided on the side wall of the hinge bracket 7 , and the ear seat 8 is fixedly connected to the ear plate 12 on the grille cover 9 through bolts 11 .

[0023] Furthermore, a tie rod 10 is provided between the upper and lower parts of the grille cover 9 to increase the strength of the grille cover 9 and reduce the probability of damage to the grille cover 9 during the earth-breaking process.

[0024] like Figure 5-7 The three-arm articulated suction dredging ship's articulated head is shown, wherein the blade arm 3 is a spiral structure, the bottom width of the blade arm 3 is B, and the value range of B is 450-550mm, and the top width is b, and the value range of b is 190-230mm, to ensure that there is sufficient connection strength between the blade arm 3 and the large ring 1 to prevent the blade arm 3 from being damaged by vegetation or rock and soil.

[0025] Furthermore, the curvature radius of the blade arm 3 is 200-1050 mm, the wrap angle is γ, and the value range of γ is 70-72°. The blade arm 3 in this range cooperates with the blade teeth 5 to quickly cut vegetation or break the soil.

[0026] Furthermore, the opening between the blade arms 3 is W, and the value range of W is 280-320 mm, ensuring that there is enough space between the blade arms 3 for passing through vegetation.

[0027] Furthermore, the maximum thickness of the blade arm 3 is 60 mm, which ensures sufficient strength of the blade arm 3 and extends the service life of the blade arm 3.

[0028] Furthermore, the angle between the circumferential teeth 6 and the large ring 1 is θ, the value range of θ is 30-40°, and the arrangement direction is the same as that of the blade teeth 5. The circumferential teeth 6 can break the soil faster at this angle.

[0029] The above three-arm dredging boat reamer is used as follows: S1: The hinge head bracket 7 is installed on the sludge suction pipe of the cutter suction vessel, and the transmission shaft is connected to the wheel hub 2; S2: Start to break and absorb the silt layer. The cone head 4 and the blade teeth 5 break the hard silt layer rock and soil. The circumferential teeth 6 assist in breaking the soil. Then the soil enters the mud suction pipe through the gaps between the blade teeth 5. The vegetation in the rock and soil is also cut and broken by the blade teeth 5 and enters the mud suction pipe. The grille cover 9 prevents the vegetation above the hinge head from winding around the hinge head.

Claims

1. A three-arm dredging vessel dredging head, characterized in that: The invention comprises a large ring (1) and a wheel hub (2), wherein the large ring (1) is fixedly connected to the wheel hub (2) via three sets of knife arms (3), a cone head (4) is arranged on the top of the wheel hub (2), a plurality of knife teeth (5) are arranged on the outer edge of the knife arms (3), a plurality of circumferential teeth (6) are arranged on the outer side of the large ring (1), and a hinge bracket (7) is arranged on the lower side of the large ring (1).

2. The three-arm type dredging vessel dredging head according to claim 1, characterized in that: The large ring (1) is rotatably connected to the hinge bracket (7), and an ear seat (8) is fixedly provided on the side wall of the hinge bracket (7). The ear seat (8) is fixedly connected to the ear plate (12) on the grille cover (9) by bolts (11).

3. The three-arm type dredging vessel dredging head according to claim 2, characterized in that: Tie bars (10) are provided between the upper and lower parts of the grille cover (9).

4. The three-arm type dredging vessel dredging head according to claim 1, characterized in that: The blade arm (3) is a spiral structure, the bottom width of the blade arm (3) is B, the value range of B is 450-550 mm, and the top width is b, the value range of b is 190-230 mm.

5. The three-arm type dredging vessel dredging head according to claim 1, characterized in that: The radius of curvature of the blade arm (3) is 200-1050 mm, the wrap angle is γ, and the value range of γ is 70-72°.

6. The three-arm type dredging vessel dredging head according to claim 1, characterized in that: The opening between the blade arms (3) is W, and the value range of W is 280-320 mm.

7. The three-arm type dredging vessel dredging head according to claim 1, characterized in that: The maximum thickness of the blade arm (3) is 60 mm.

8. The three-arm type dredging vessel dredging head according to claim 1, characterized in that: The angle between the circumferential teeth (6) and the large ring (1) is θ, the value range of θ is 30-40°, and the arrangement direction is the same as that of the blade teeth (5).

9. The method for using the reamer of a three-arm reamer suction dredging vessel according to claims 1-8, characterized in that: The following steps are involved: S1: The slitting head bracket (7) is installed on the sludge suction pipe of the slitting suction vessel, and the transmission shaft is connected to the wheel hub (2) in a transmission manner; S2: The silt layer is broken and sucked. The cone head (4) and the blade teeth (5) break the hard rock and soil of the silt layer. The circumferential teeth (6) assist in breaking the soil. Then, the soil enters the mud suction pipe through the gaps between the blade teeth (5). The vegetation in the rock and soil is also cut and broken by the blade teeth (5) and enters the mud suction pipe. The grille cover (9) prevents the vegetation above the hinge head from winding around the hinge head.

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