A sealing structure for a ship's drag pipe slider

Abstract

This invention relates to the field of marine equipment technology and discloses a sealing structure for a slider of a marine suction duct, comprising: a seat ring having an annularly extending sealing groove; a sealing ring including a sealing body and a sealing skirt, the sealing body being fastened and assembled into the sealing groove; a fastening member pressing the sealing skirt, the sealing body and the sealing skirt forming a sealing air cavity; the sealing ring having an initial state where the sealing air cavity is not filled with air and a sealed state where the sealing air cavity is filled with air; in the initial state, the height of the sealing body is lower than the opening of the sealing groove; in the sealed state, the sealing ring expands and fills the sealing groove; and a pipe joint arranged on the seat ring, with a gas channel connecting the pipe joint and the sealing air cavity. In the initial state, the sealing body is not exposed outside the sealing groove, and the sealing ring does not come into contact with the sealing surface and rub when the slider of the suction duct slides on the slide rail, thus extending the service life of the sealing ring.

Description

Technical Field

[0001] This invention relates to the field of marine equipment technology, and in particular to a sealing structure for a slider of a marine rake suction pipe. Background Technology

[0002] During dredging operations, trailing suction hopper dredgers utilize a trailing suction pipe for dredging. One end of the pipe is connected to a slider, which slides along a rail to align with the suction port on the hull side. This allows the trailing suction pipe connected to the slider to connect with the dredging pipe inside the hull. After the dredging operation is completed, the slider is slid back along the rail to disconnect the trailing suction pipe from the dredging pipe. The slider and pipe are then lifted out of the water and placed on the deck to ensure safe navigation and facilitate routine maintenance of the slider and pipe.

[0003] During underwater operations, the slider and the suction port on the side of the hull need to be sealed to prevent mud from leaking into the water and causing pollution. Existing sealing methods typically involve mounting a sealing ring on the slider. However, the slider and slide rail in this application form a dynamic sealing structure. When the slider slides along the slide rail, the sealing ring is prone to friction with the protruding parts on the side of the hull, causing wear on the sealing ring and reducing its service life. Summary of the Invention

[0004] The purpose of this invention is to provide a sealing structure for a ship's suction pipe slider, in order to solve the problem in the prior art where the sealing ring on the suction pipe slider rubs against the side of the ship's hull, reducing the service life of the sealing ring.

[0005] To achieve the above objectives, the present invention provides a sealing structure for a slider of a ship's trailing suction pipe, comprising:

[0006] A seat ring for fitting onto a sealing surface of the suction pipe slider near the hull side, the seat ring having an annularly extending sealing groove;

[0007] A sealing ring, comprising a sealing body and a sealing skirt located at the edge of the sealing body, wherein the sealing body is fastened into the sealing groove;

[0008] The fastening component fastens the sealing skirt, and the sealing body and the sealing skirt surround to form a sealing air cavity. The sealing ring has an initial state in which the sealing air cavity is not filled with air and a sealed state in which the sealing air cavity is filled with air. When the sealing ring is in the initial state, the height of the sealing body is lower than the opening of the sealing groove. When the sealing ring is in the sealed state, the sealing ring expands and fills the sealing groove.

[0009] A pipe connector is arranged on the seat ring, and a gas channel is connected between the pipe connector and the sealed gas cavity. The pipe connector is used to connect to an external gas source.

[0010] Preferably, the sealing ring covers the fastening member, the sealing skirt has a folded section that folds towards the sealing body, and the fastening member snaps onto the folded section.

[0011] Preferably, the fastener is an annular structure, and the edge of the fastener has a fastening claw extending toward the sealing skirt, the fastening claw being fastened to the folded section.

[0012] Preferably, the seat ring is provided with a first stepped hole, and multiple sets of the first stepped holes are arranged at intervals along the circumference of the sealing groove. The first stepped holes are arranged on the side opposite to the sealing groove. A fixing screw is installed in the first stepped hole, and the fastening member is threadedly assembled with the fixing screw.

[0013] Preferably, the fixing screw includes a vent screw and an assembly screw, the vent screw has a central hole, the fastening member has a vent hole communicating with the central hole, the seat ring has an air passage communicating with the central hole, and the gas passage includes the air passage, the central hole, and the vent hole.

[0014] Preferably, the sealing body is provided with a sealing protrusion, which extends circumferentially along the sealing ring to form a closed ring structure, and a groove is formed between the edge of the sealing body and the sealing body.

[0015] Preferably, the seat ring is further provided with a second stepped hole, and multiple sets of the second stepped holes are arranged at intervals along the circumference of the sealing groove. The second stepped hole is located on the outside of the sealing ring, and a locking screw is installed in the second stepped hole.

[0016] Compared with the prior art, the sealing structure for a slider of a ship's suction pipe, as described in this embodiment of the invention, has the following advantages: a sealing groove is opened on the seat ring to assemble the sealing ring, which can be arranged in the sealing groove to protect it. The sealing air chamber of the sealing ring is connected to a pipe joint on the seat ring via a gas channel. After the slider slides into position, the gas source can be connected to the pipe joint and then inflated into the sealing air chamber through the gas channel. After the sealing ring expands, the sealing body fills the sealing groove, and the outer side of the sealing body contacts the sealing surface to seal. Maintaining the pressure of the gas source ensures the sealing effect. When the sealing air chamber is not inflated and the sealing ring is in its initial state, the height of the sealing body of the sealing ring is lower than the opening of the sealing groove, and the sealing body is not exposed outside the sealing groove. When the slider of the suction pipe slides on the slide rail, the sealing ring will not come into contact with the sealing surface and rub against it, thus protecting the sealing ring and extending its service life. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the sealing structure for the slider of a ship's suction pipe according to the present invention;

[0018] Figure 2 yes Figure 1 A cross-sectional view along line AA of the sealing structure used for the slider of a ship's rake suction pipe;

[0019] Figure 3 yes Figure 1 A cross-sectional view along line BB of the sealing structure used for the slider of a ship's rake suction pipe;

[0020] Figure 4 yes Figure 3 A schematic diagram of the sealing ring used in the sealing structure of a ship's trailing suction pipe slider;

[0021] Figure 5 yes Figure 3 A schematic diagram of the fastening components for the sealing structure of a ship's suction pipe slider;

[0022] Figure 6 yes Figure 3 A schematic diagram of the vent screw used in the sealing structure of the slider of a ship's rake suction pipe;

[0023] Figure 7 This is a schematic diagram of the working process of the sealing structure of the ship's suction pipe slider after it is assembled onto the slider and the hull.

[0024] In the diagram, 1. Seat ring, 11. Sealing groove, 12. First step hole, 13. Second step hole, 14. Air passage, 2. Sealing ring, 21. Sealing body, 22. Sealing skirt, 23. Folded section, 24. Sealing protrusion, 3. Fastening part, 31. Fastening claw, 32. Vent hole, 4. Pipe joint, 5. Fixing screw, 51. Vent screw, 511. Center hole, 52. Assembly screw, 6. Locking screw, 7. Sliding block, 8. Hull side. Detailed Implementation

[0025] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0026] A preferred embodiment of the sealing structure for a ship's suction duct slider according to the present invention, such as... Figures 1 to 7 As shown, the sealing structure for the slider of the ship's snorkel includes a seat ring 1, a sealing ring 2, a fastening element 3, and a pipe connector 4.

[0027] The seat ring 1 is used to assemble on the sealing surface of the slide block of the trailing suction hopper near the hull side. The seat ring 1 also has an annularly extending sealing groove 11, which surrounds the side suction port of the hull side 8. The sealing groove 11 is used to assemble the sealing ring 2 to seal the sealing surface between the sealing ring 1 and the side suction port. The seat ring 1 is the assembly base of this sealing structure. In this embodiment, the seat ring 1 is an annular structure. The seat ring 1 is fixedly assembled on the slide block 7 of the trailing suction hopper dredger. The surface of the seat ring 1 away from the slide block 7 is the sealing surface of the seat ring 1. The sealing groove 11 is arranged on the sealing surface of the seat ring 1. The sealing groove 11 has a rectangular cross-section and is concentrically arranged with the seat ring 1.

[0028] The sealing ring 2 includes a sealing body 21 and a sealing skirt 22. The sealing skirt 22 is located at the edge of the sealing body 21, and the sealing skirt 22 and the sealing body 21 are integrally formed. A notch is formed at the sealing skirt 22 of the sealing ring 2. The sealing body 21 is fastened and assembled into the sealing groove 11, that is, the sealing skirt 22 is arranged to fit against the bottom of the sealing groove 11, and the sealing body 21 is arranged facing the opening of the sealing groove 11. This fastening arrangement utilizes the bottom of the sealing groove 11 to align with the notch at the sealing skirt 22. In this embodiment, the sealing ring 2 has an overall hollow structure with a square cross-section, and the sealing skirt 22 is open.

[0029] The fastener 3 clamps the sealing skirt 22 of the sealing ring 2 to fix the sealing ring 2, and at the same time seals the notch at the sealing skirt 22, so that the sealing body 21 and the sealing skirt 22 enclose to form a sealed air cavity. The fastener 3 is used to fasten the sealing ring 2 in the sealing groove 11 to prevent the sealing ring 2 from falling out of the sealing groove 11 when inflated. At the same time, the fastener 3 can also seal the notch at the sealing skirt 22, so that the sealed air cavity in the sealing ring 2 is in a sealed state, preventing air leakage in the sealed air cavity when inflated.

[0030] The sealing ring 2 has an initial state and a sealed state. In the initial state, the sealing air chamber is not filled with air. At this time, the height of the sealing body 21 is lower than the opening of the sealing groove 11, that is, the sealing body 21 is completely located in the sealing groove 11 and does not protrude from the sealing groove 11. There is a gap between the surface of the sealing body 21 and the seat ring 1, and the seat ring 1 can be used to protect the sealing ring 2. In the sealed state, the sealing air chamber is filled with air. At this time, the sealing ring 2 expands and fills the sealing groove 11. The sealing body 21 can contact the side suction port sealing surface of the hull side 8 to achieve a seal.

[0031] Pipe connector 4 is located on the side of seat ring 1. A gas channel connects pipe connector 4 to the sealing gas chamber, and pipe connector 4 is used to connect to an external gas source. In the initial state, the sealing gas chamber does not need to be filled with gas, and pipe connector 4 is disconnected from the external gas source. In the sealed state, pipe connector 4 is connected to the gas source, and gas enters the sealing gas chamber through the gas channel to expand the sealing ring 2 for sealing. The gas source continuously fills the sealing gas chamber with gas through pipe connector 4 and the gas channel, so that the sealing gas chamber always maintains a set pressure value to ensure the sealing effect.

[0032] The sealing structure for the slider of the ship's suction pipe has a sealing groove 11 on the seat ring 1 to assemble the sealing ring 2. The sealing ring 2 can be arranged in the sealing groove 11, which protects the sealing ring 2. The sealing air chamber of the sealing ring 2 is connected to the pipe joint 4 on the seat ring 1 through a gas channel. After the slider 7 slides into place, the gas source can be connected to the pipe joint 4 and gas can be injected into the sealing air chamber through the gas channel. After the sealing ring 2 expands, the sealing body 21 fills the sealing groove 11. The outer side of the sealing body 21 contacts the sealing surface to seal. The sealing effect can be guaranteed by maintaining the pressure of the gas source. When the sealing air chamber is not inflated and the sealing ring 2 is in the initial state, the height of the sealing body 21 of the sealing ring 2 is lower than the opening of the sealing groove 11. The sealing body 21 is not exposed outside the sealing groove 11. When the slider 7 of the suction pipe slides on the slide rail, the sealing ring 2 will not come into contact with the sealing surface and rub against it, thereby protecting the sealing ring 2 and extending its service life.

[0033] Preferably, the sealing ring 2 covers the fastening member 3, and the sealing skirt 22 has a folded section 23 that folds towards the sealing body 21, and the fastening member 3 fastens the folded section 23.

[0034] The sealing ring 2 covers the fastening element 3, so that the fastening element 3 is located inside the sealing cavity. This facilitates the sealing body 21 and sealing skirt 22 of the sealing ring 2 to expand outward and press against the inner wall of the sealing groove 11, maintaining the sealing effect. The sealing skirt 22 has a folded section 23, which increases the contact area between the fastening element 3 and the sealing skirt 22, thereby increasing the sealing effect of the fastening element 3 on the sealing skirt 22.

[0035] Preferably, the fastener 3 has a ring structure, and the edge of the fastener 3 has a claw 31 extending toward the sealing skirt 22, which is fastened to the folded section 23.

[0036] The fastener 3 is a ring-shaped closed structure with overall rigidity, which can press the sealing skirt 22 in the entire circumference to ensure the effectiveness of the seal. The edge of the fastener 3 has a claw 31 that extends towards the sealing skirt 22. In this embodiment, the inner wall surface of the claw 31 is a slope, and the bottom of the slope is inclined towards the outside of the fastener 3. After the claw 31 and the folded section 23 are fastened together, a line seal is formed, which increases the sealing effect.

[0037] Preferably, the seat ring 1 is provided with a first stepped hole 12, and multiple sets of the first stepped holes 12 are arranged at intervals along the circumference of the sealing groove 11. The first stepped holes 12 are arranged on the side away from the sealing groove 11. A fixing screw 5 is installed in the first stepped hole 12, and the fastening part 3 is threadedly assembled with the fixing screw 5.

[0038] A first stepped hole 12 is provided on the seat ring 1. The fastening member 3 is assembled into the assembly groove by threaded assembly with the fixing screw 5. The fixing screw 5 applies pressure to the sealing skirt 22 by the fastening member 3, which simplifies the fixing method of the fastening member 3. The first stepped hole 12 is provided to assemble the fixing screw 5, which can ensure that the fixing screw 5 is completely located in the first stepped hole 12 and prevent the first stepped hole 12 from exceeding the seat ring 1.

[0039] Preferably, the fixing screw 5 includes a vent screw 51 and an assembly screw 52. The vent screw 51 has a central hole 511. The fastening member 3 has a vent hole 32 communicating with the central hole 511. The seat ring 1 has an air passage 14 communicating with the central hole 511. The air passage includes the air passage 14, the central hole 511 and the vent hole 32.

[0040] The assembly screw 52 has a standard screw structure. The vent screw 51 has a central hole 511, which allows it to function as both a fastener for securing the fastener 3 and part of the gas passage. The fastener 3 has a vent hole 32 that communicates with the central hole 511, so that the vent hole 32, the central hole 511, and the gas passage 14 together form a gas passage. By using the fastener 3 and the vent screw 51 to arrange the gas passage, there is no need to arrange additional structural components in the sealed gas cavity, simplifying the specific arrangement of the gas passage.

[0041] Preferably, a sealing protrusion 24 is provided on the sealing body 21, the sealing protrusion 24 extends circumferentially along the sealing ring 2 to form a closed ring structure, and a groove is formed between the edge of the sealing body 21 and the sealing body 21.

[0042] A sealing protrusion 24 is arranged on the sealing body 21. The sealing protrusion 24 can increase the cross-sectional thickness of the sealing ring 2 and improve the rebound effect of the sealing ring 2. After the sealing body 21 expands, the sealing protrusion 24 contacts the sealing surface of the hull side 8, and a line seal is formed between the sealing protrusion 24 and the sealing surface, which increases the sealing effect.

[0043] Preferably, the seat ring 1 is further provided with a second stepped hole 13. Multiple sets of the second stepped holes 13 are arranged at intervals along the circumference of the sealing groove 11. The second stepped holes 13 are located on the outside of the sealing ring 2. Locking screws 6 are installed in the second stepped holes 13.

[0044] The second stepped hole 13 on the seat ring 1 can be fitted with a locking screw 6. The locking screw 6 is completely located within the second stepped hole 13, ensuring that the sealing surface of the seat ring 1 is flat and facilitating the movement of the slider 7. In addition, the seat ring 1 is provided with multiple second stepped holes 13 to form a flange structure, and the locking screw 6 is used to ensure the fixed stability of the seat ring 1.

[0045] The working process of this invention is as follows: The sealing structure is installed on the slider 7 of the trailing suction pipe of the trailing suction dredger. The seat ring 1 is fixedly assembled on the sealing surface of the slider 7 by the locking screw 6. In the initial state, the pipeline connector 4 is disconnected from the air source, the sealing air chamber is not filled with gas, and the sealing body 21 of the sealing ring 2 is lower than the sealing surface of the seat ring 1. The seat ring 1 provides good protection for the sealing ring 2. During operation, the pipeline connector 4 is connected to the air source. The compressed gas enters the sealing air chamber inside the sealing ring 2 through the gas passage 14, the central hole 511 of the vent screw 51, and the vent hole 32 of the fastener 3 in sequence. Under the action of air pressure, the sealing body 21 of the sealing ring 2 expands and bulges upward, contacting the sealing surface of the side suction port 8 of the hull, thus achieving a sealing effect. After the operation is completed, the compressed air is depressurized, the air source is disconnected from the pipeline connector 4, and the sealing ring 2 returns to the initial state.

[0046] In summary, this invention provides a sealing structure for a slider of a ship's suction pipe. A sealing groove is formed on the seat ring to accommodate a sealing ring, which is then placed within the groove. The groove protects the sealing ring. The sealing gas chamber of the sealing ring is connected to a pipe connector on the seat ring via a gas channel. After the slider slides into position, an air source can be connected to the pipe connector, and air can be pumped into the sealing gas chamber through the gas channel. As the sealing ring expands, the sealing body fills the sealing groove, and the outer side of the sealing body contacts the sealing surface to seal. Maintaining the pressure of the air source ensures the sealing effect. When the sealing gas chamber is not inflated and the sealing ring is in its initial state, the height of the sealing body is lower than the opening of the sealing groove, preventing the sealing body from being exposed outside the groove. When the slider of the suction pipe slides on the slide rail, the sealing ring will not come into contact with the sealing surface and rub against it, thus protecting the sealing ring and extending its service life.

[0047] 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 substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A sealing structure for a slider of a ship's trailing suction pipe, characterized in that, include: Seat ring (1), the seat ring (1) is used to fit the sealing surface of the rake suction pipe slider near the hull side, the seat ring (1) has an annularly extending sealing groove (11). A sealing ring (2) includes a sealing body (21) and a sealing skirt (22) located at the edge of the sealing body (21). The sealing body (21) is fastened to the sealing groove (11). The fastening member (3) fastens the sealing skirt (22), and the sealing body (21) and the sealing skirt (22) enclose to form a sealing air cavity. The sealing ring (2) has an initial state in which the sealing air cavity is not filled with air and a sealed state in which the sealing air cavity is filled with air. When the sealing ring (2) is in the initial state, the height of the sealing body (21) is lower than the opening of the sealing groove (11). When the sealing ring (2) is in the sealed state, the sealing ring (2) expands and fills the sealing groove (11). Pipe connector (4), the pipe connector (4) is arranged on the seat ring (1), the pipe connector (4) is connected to the sealed air cavity by a gas channel, and the pipe connector (4) is used to connect to an external gas source; The seat ring (1) is provided with a first stepped hole (12), and multiple sets of the first stepped holes (12) are arranged at intervals along the circumference of the sealing groove (11). The first stepped holes (12) are arranged on the side away from the sealing groove (11). A fixing screw (5) is installed in the first stepped hole (12), and the fastener (3) is threadedly assembled with the fixing screw (5). The fixing screw (5) includes a vent screw (51) and an assembly screw (52). The vent screw (51) has a center hole (511). The fastener (3) has a vent hole (32) communicating with the center hole (511). The seat ring (1) has an air passage (14) communicating with the center hole (511). The air passage includes the air passage (14), the center hole (511), and the vent hole (32).

2. The sealing structure for a ship's drag pipe shoe according to claim 1, characterized by, The sealing ring (2) covers the fastening member (3), the sealing skirt (22) has a folded section (23) that folds towards the sealing body (21), and the fastening member (3) fastens the folded section (23).

3. The sealing structure for a ship's suction duct slider according to claim 2, characterized in that, The fastener (3) is a ring structure, and the edge of the fastener (3) has a fastening claw (31) extending toward the sealing skirt (22), and the fastening claw (31) is fastened to the folding section (23).

4. A sealing structure for a ship's spud pipe shoe according to any one of claims 1-3, characterized in that, The sealing body (21) is provided with a sealing protrusion (24), which extends circumferentially along the sealing ring (2) to form a closed ring structure, and a groove is formed between the edge of the sealing body (21) and the sealing body (21).

5. A sealing structure for a ship's spud pipe shoe according to any one of claims 1-3, characterized in that, The seat ring (1) is also provided with a second stepped hole (13). Multiple sets of the second stepped holes (13) are arranged at intervals along the circumference of the sealing groove (11). The second stepped holes (13) are located on the outside of the sealing ring (2). Locking screws (6) are installed in the second stepped holes (13).

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