A bushing type elbow slider device and method of use thereof

Abstract

The application discloses a sleeve type elbow pipe sliding block device and a use method thereof, and belongs to the technical field of elbow pipes of dredging ships. The sleeve type elbow pipe sliding block device comprises a sliding block seat sliding on a lateral guide rail of a ship body, further comprises a hinged arm structure, the hinged arm structure is rotationally connected with the sliding block seat, and an elbow pipe body is arranged in the hinged arm structure; a first connecting piece is fixedly arranged on one side of the sliding block seat and rotationally connected with the elbow pipe body; a sealing piece is fixedly connected with the first connecting piece and used for sealing a gap between the elbow pipe body and the first connecting piece; and a second connecting piece is fixedly connected with the sliding block seat. The application changes the stress of the elbow pipe body from the structural design, so that the elbow pipe no longer bears the pulling force of the rake pipe, the pulling force burden is released, the design focus is on the wear resistance, the wear-resistant surfacing pipe type is adopted, the service life of the elbow pipe is prolonged, the repair period of the elbow pipe body is prolonged, and the construction efficiency of the dredging ship is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dredging ship elbow pipe, and particularly relates to a sleeve type elbow pipe sliding block device and a use method thereof. BACKGROUND

[0002] Self-propelled drag suction dredger is the main ship type in dredging industry, and is widely applicable. When dredging, the dredger transports seabed sand to the mud tank through the rake head, rake arm pipe system, underwater pump and ship side suction. As the terminal connecting component of the rake arm pipe system, the traditional elbow pipe sliding block needs to bear the great tension of the rake pipe and the high-speed scouring and abrasion of the sand to the inner wall of the elbow pipe. This forces the designer to make a difficult choice between strength and abrasion resistance.

[0003] To ensure the safety of the structure, the strength requirement is usually given priority to, and the elbow pipe is made of thick castings, which leads to excessive weight. The heavy elbow pipe aggravates the load of the sliding block body and the lifting mechanism, and is prone to damage. In the traditional design, the elbow pipe is directly connected with the sliding block body through flanges, and is difficult to maintain. Once the inner wall of the elbow pipe is abraded, a large number of connected components need to be disassembled, and the disassembly process is extremely complex and the workload is huge. SUMMARY

[0004] The present application relates to the technical field of dredging ship elbow pipe, and particularly relates to a sleeve type elbow pipe sliding block device and a use method thereof.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] A sleeve type elbow pipe sliding block device, comprising a sliding block seat sliding on the outer side guide rail of the ship body, further comprising:

[0007] An articulated arm structure, which is rotationally connected with the sliding block seat, and an elbow pipe body is arranged in the articulated arm structure;

[0008] A first connecting piece, which is fixedly arranged on one side of the sliding block seat and rotationally connected with the elbow pipe body;

[0009] A sealing piece, which is fixedly connected with the first connecting piece and used for sealing the gap between the elbow pipe body and the first connecting piece;

[0010] And a second connecting piece, which is fixedly connected with the sliding block seat;

[0011] Wherein, one end of the articulated arm structure is rotationally arranged in the surrounding groove formed by the sliding block seat, the first connecting piece and the second connecting piece.

[0012] Preferably, the sliding block seat comprises a sliding block body, sliding blocks fixed on both sides of the sliding block body and connected with the guide rail in sliding mode, and a mounting frame fixed on the upper side of the sliding block body, an opening is formed on the sliding block body and matched with the movable end of the elbow pipe body, and a wear-resistant ring is fixed on the inner side of the surrounding groove of the sliding block body.

[0013] Preferably, the hinge arm structure comprises a U-shaped seat, an elbow pipe sleeve fixed on the inner side of the U-shaped seat, a rotating flange fixed on the end of the elbow pipe sleeve, hinge arm frames fixed on both ends of the U-shaped seat and connected with the rake arm in rotating mode, and a wear-resistant pipe arranged between the two hinge arm frames through a fixing plate, one end of the elbow pipe body is provided with a flange, the flange end of the elbow pipe body is fixedly connected with the wear-resistant pipe through bolts, and the other end of the elbow pipe body is arranged in the elbow pipe sleeve and the rotating flange.

[0014] Preferably, the first connecting piece comprises a sealing seat and an outer ring fixedly connected with the sliding block seat through bolts, a suction port wear-resistant ring fixed on the sealing seat, and a dynamic sealing ring arranged between the suction port wear-resistant ring and the outer ring, and the suction port wear-resistant ring is connected with the sliding block seat and the dynamic sealing ring.

[0015] Preferably, the dynamic sealing ring is arranged as an air tire sealing ring, a gas pressurizing channel is arranged in the dynamic sealing ring, and the outer side wall of the dynamic sealing ring is tightly attached to the outer ring and the suction port wear-resistant ring after the gas pressurizing channel is pressurized.

[0016] Preferably, the sealing piece comprises a water seal compression ring fixedly connected with the sealing seat through bolts, and a water seal rubber ring arranged between the water seal compression ring and the sealing seat, and the water seal rubber ring is movably abutted with the elbow pipe body.

[0017] Preferably, the second connecting piece comprises a gland fixedly connected with the sliding block seat, fastening bolts arranged between the gland and the sliding block seat, and a wear-resistant compression ring fixed on the gland and abutted with the sliding block body and the rotating flange.

[0018] Preferably, a wedge-shaped block is fixed on the sliding block body, and a wedge-shaped limiting block is fixed on the guide rail and movably abutted with the wedge-shaped block.

[0019] Preferably, a wheel groove is fixed on the sliding block, a pulley is rotatably connected in the wheel groove through a rotating shaft, and the pulley is slidably connected with a steel wire rope of a winch mechanism on the ship body.

[0020] The application further discloses a use method of the sleeve type elbow pipe sliding block device.

[0021] S1: connecting the pulley with the steel wire rope of the winch mechanism, hanging the sliding block seat to the guide rail of the ship body through the mounting frame, hinging the hinge arm frame with the rake arm, fixing the flange end of the elbow pipe body with the wear-resistant pipe through bolts, and arranging the other end of the elbow pipe body in the elbow pipe sleeve and the rotating flange;

[0022] S2: Inject compressed air into the pressurized channel of the dynamic sealing ring, so that it expands and tightly fits the outer gasket and the suction wear ring. The dynamic sealing ring tightly fits the ship's side suction inlet, and the underwater pump is started. The sand is transported to the mud tank through the elbow body;

[0023] S3: When the rake arm is operating, the elbow body rotates in the elbow sleeve, and the rotating flange rotates in the surrounding groove. The wear-resistant gasket and the wear-resistant pressure ring double the wear reduction. The wedge block cooperates with the wedge limiting block to limit the displacement of the sliding block seat.

[0024] S4: When the elbow body needs to be disassembled and replaced due to damage, remove the connecting bolts of the elbow body flange end and the wear-resistant pipe, and directly extract the worn elbow body without disassembling the first connecting piece, the sealing piece and the second connecting piece.

[0025] S5: Insert the new elbow body into the inner cavity formed by the elbow sleeve and the rotating flange, bolt the elbow body flange end and the wear-resistant pipe, and re-pressurize the dynamic sealing ring to quickly put the elbow body into use.

[0026] Compared with the prior art, the present application provides a sleeve type elbow sliding block device and its use method, which has the following beneficial effects:

[0027] 1. The sleeve type elbow sliding block device and its use method change the stress of the elbow body from the structural design, so that the elbow no longer bears the tension of the rake pipe, relieving the tension burden. The design focuses on wear resistance, using a wear-resistant surfacing pipe type, which improves the overall service life of the elbow and the sliding block, prolongs the repair cycle of the elbow body, greatly simplifies the replacement process of the worn elbow, and ensures the construction efficiency of the dredger, solving the problems of "contradiction between strength and wear resistance" and "complexity of maintenance" of traditional elbow sliding blocks, especially suitable for high-load operation of self-propelled rake suction dredgers in dredging scenes.

[0028] 2. The sleeve type elbow sliding block device and its use method, through the flange bolt connection of the elbow body to the wear-resistant pipe, and the non-rigid binding of the sealing piece, the sealing assembly remains in place after the air tire is depressurized, and the elbow can be axially extracted, reducing the maintenance difficulty of the workers and improving the elbow maintenance efficiency.

[0029] 3. The sleeve type elbow sliding block device and its use method adjust the tension transmission path, so that the rake pipe transmits the tension to the sliding block body through the hinge arm frame, the rotating flange and the wear-resistant pressure ring in turn, so that the elbow body only bears the radial force of the medium, the elbow wall thickness can be thinned, and the anti-wear design is focused. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 The structure of the present application is shown in the figure;

[0031] Figure 2 for Figure 1 Left view of;

[0032] Figure 3 for Figure 1 The main view;

[0033] Figure 4 for Figure 1 Right view;

[0034] Figure 5 It is a schematic cross-sectional structural diagram of the slider seat of the present invention;

[0035] Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure of the middle part A;

[0036] Figure 7 The structure of the slider seat of the present invention is shown in FIG. Figure 1 ;

[0037] Figure 8 The structure of the slider seat of the present invention is shown in FIG. Figure 2 ;

[0038] Figure 9 Schematic diagram of the structure of the elbow body of the present invention;

[0039] Figure 10 The structure diagram of the hinge arm structure of the present invention is shown in FIG. Figure 1 ;

[0040] Figure 11 The structure diagram of the hinge arm structure of the present invention is shown in FIG. Figure 2 ;

[0041] Figure 12 It is a structural schematic diagram of the gland of the present invention;

[0042] Figure 13 Schematic diagram of the external structure of the sealing seat of the present invention;

[0043] Figure 14 It is a schematic structural diagram of the wear-resistant liner of the present invention;

[0044] Figure 15 It is a schematic structural diagram of the wear-resistant pressure ring of the present invention.

[0045] In the figure: 1, guide rail; 2, sliding block base; 201, sliding block body; 2011, opening; 2012, wear-resistant ring; 2013, wedge-shaped block; 202, sliding base; 203, mounting frame; 3, articulated arm structure; 301, U-shaped seat; 302, elbow sleeve; 303, rotating flange; 304, articulated arm frame; 3041, fixed plate; 305, wear-resistant pipe; 4, elbow body; 5, first connecting piece; 501, sealing seat; 502, outer ring; 503, suction wear ring; 504, dynamic sealing ring; 6, sealing piece; 601, water seal compression ring; 602, water seal rubber ring; 7, second connecting piece; 701, gland; 702, fastening bolt; 703, wear-resistant compression ring; 8, surrounding groove; 9, wedge-shaped limiting block; 10, wheel groove; 1001, pulley. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments of the present application.

[0047] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0048] As Figures 1 to 5As shown, the present embodiment proposes a sleeve type elbow pipe sliding block device, which comprises a sliding block base 2 sliding on the hull outside guide rail 1, and further comprises a hinged arm structure 3, a first connecting piece 5, a sealing piece 6 and a second connecting piece 7. The hinged arm structure 3 is rotationally connected with the sliding block base 2, and the hinged arm structure 3 is provided with an elbow pipe body 4. The first connecting piece 5 is fixedly arranged on one side of the sliding block base 2 and rotationally connected with the elbow pipe body 4. The sealing piece 6 is fixedly connected with the first connecting piece 5 and used for sealing the gap between the elbow pipe body 4 and the first connecting piece 5. The second connecting piece 7 is fixedly connected with the sliding block base 2. One end of the hinged arm structure 3 is rotationally arranged in an enclosed groove 8 formed by the sliding block base 2, the first connecting piece 5 and the second connecting piece 7. One end of the elbow pipe body 4 is connected with the hinged arm structure 3, and the other end is movably arranged in the enclosed groove 8 formed by the sliding block base 2, the first connecting piece 5 and the second connecting piece 7. The sealing piece 6 forms a rotary seal between the elbow pipe body 4. The force on the elbow pipe body 4 is changed from the structural design, so that the elbow pipe no longer bears the pulling force of the hinged arm pipe, and the pulling force burden is removed. The design focus is on wear resistance, and the wear-resistant surfacing pipe type is adopted, which improves the overall service life of the elbow pipe and the sliding block, prolongs the repair cycle of the elbow pipe body 4, greatly simplifies the replacement process of the worn elbow pipe, and is convenient to maintain, thereby ensuring the construction efficiency of the dredger, solving the problems of "contradiction between strength and wear resistance" and "complexity of maintenance" of the traditional elbow pipe sliding block, and being especially suitable for the dredging scene of the self-propelled drag suction dredger with high load operation.

[0049] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 7 , Figure 8 and Figure 13As shown, as a preferred embodiment, on the basis of the above-mentioned mode, further, the slider seat 2 comprises a slider body 201, a sliding seat 202 fixed on both sides of the slider body 201 and connected with the guide rail 1 in sliding mode, and a mounting bracket 203 fixed on the upper side of the slider body 201, the slider body 201 is provided with an opening 2011 matched with the movable end of the elbow pipe body 4, and the slider body 201 is fixed with a wear-resistant ring 2012 on the inner side of the surrounding groove 8; the slider body 201 is a core bearing part, and the opening 2011 matched with the movable end of the elbow pipe body 4 is formed in the slider body 201, so as to ensure the freedom degree when the elbow pipe body 4 swings dynamically, the sliding seat 202 is symmetrically arranged on both sides of the slider body 201, and can be in rolling contact with the guide rail 1 through rollers, so as to reduce the friction resistance, the mounting bracket 203 is connected with the top of the external winch mechanism, so as to realize overall suspension positioning; the wear-resistant ring 2012 is welded on the inner side of the surrounding groove 8, and forms high-hardness friction fit with the rotating flange 303, so as to prolong the service life; the slider seat 2 is hoisted to the guide rail 1 through the mounting bracket 203, when the elbow pipe body 4 swings at the opening 2011, the wear-resistant ring 2012 bears the rotating friction, the sliding seat 202 translates along the guide rail 1, and when the wear-resistant ring 2012 needs to be replaced due to serious wear, the second connecting part 7 can be removed.

[0050] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 9 , Figure 10 and Figure 11 , as a preferred embodiment, on the basis of the above-mentioned mode, further, the hinge arm structure 3 comprises a U-shaped seat 301, an elbow pipe sleeve 302 fixed on the inner side of the U-shaped seat 301, a rotating flange 303 fixed on the end of the elbow pipe sleeve 302, a hinge arm bracket 304 fixed on both ends of the U-shaped seat 301 and connected with the rake arm in rotating mode, and a wear-resistant pipe 305 arranged between the two hinge arm brackets 304 through a fixed plate 3041, one end of the elbow pipe body 4 is provided with a flange, the flange end of the elbow pipe body 4 is fixedly connected with the wear-resistant pipe 305 through bolts, and the other end of the elbow pipe body 4 away from the flange is arranged in the elbow pipe sleeve 302 and the rotating flange 303;

[0051] The U-shaped seat 301 is the main frame of the hinged arm structure 3, and the inner side of the welded elbow sleeve 302 forms an elbow passage; the rotating flange 303 is fixed at the end of the elbow sleeve 302 and cooperates with the surrounding groove 8 of the sliding block seat 2 to realize rotation; the hinged arm bracket 304 is connected with the wear-resistant pipe 305 at both ends through the fixed plate 3041 to form a hinged point with the rake arm; the elbow body 4 is rigidly fixed with the wear-resistant pipe 305 through the flange end and the other end is inserted into the elbow sleeve 302 to swing freely, the elbow movable end rotates in the elbow sleeve 302, the rotating flange 303 is in frictional cooperation with the wear-resistant ring 2012, the tension is directly transmitted to the wear-resistant pipe 305 through the hinged arm bracket 304, the stress path is separated, the hinged arm structure 3 bears 100% tension, and the wall thickness of the elbow is reduced by more than 30%; the elbow body 4 can be replaced by only disassembling the flange end bolt, the elbow replacement and maintenance time is shortened, and it is suitable for high-load dredging scenes such as self-propelled rake suction dredgers.

[0052] As shown in Figure 5 , Figure 6 and Figure 14 , as a preferred embodiment, on the basis of the above-mentioned mode, further, the first connecting piece 5 includes a sealing seat 501 and an outer ring 502 fixedly connected with the sliding block seat 2 through bolts, a suction wear ring 503 fixed on the sealing seat 501, and a dynamic sealing ring 504 arranged between the suction wear ring 503 and the outer ring 502, the suction wear ring 503 is connected with the sliding block seat 2 and the dynamic sealing ring 504; the dynamic sealing ring 504 is arranged as a pneumatic tire sealing ring, and a gas pressurizing passage is arranged in the dynamic sealing ring 504, after the gas pressurizing passage is pressurized, the outer side wall of the dynamic sealing ring 504 tightly fits the outer ring 502 and the suction wear ring 503;

[0053] The sealing seat 501 is rigidly connected with the sliding block seat 2 through bolts, as a fixed base of the sealing system, the suction wear ring 503 is coaxially installed with the sealing seat 501, and high-chromium cast iron material can be used to resist sand and stone erosion, the outer ring 502 is welded to the inner side of the sealing seat 501 and forms a rotating cooperation with the movable end of the elbow body 4, the dynamic sealing ring 504 is a pneumatic rubber ring, radial expansion sealing is realized through air pressure adjustment, compressed air is injected into the dynamic sealing ring 504 to make it radially expand and seal the gap, when the elbow body 4 swings, the outer ring 502 guides its rotation, the suction wear ring 503 resists medium erosion, and the service life of the device is guaranteed.

[0054] As shown in Figure 5 and Figure 6 , as a preferred embodiment, on the basis of the above-mentioned mode, further, the sealing piece 6 includes a water seal compression ring 601 fixedly connected with the sealing seat 501 through bolts and a water seal rubber ring 602 arranged between the water seal compression ring 601 and the sealing seat 501, the water seal rubber ring 602 is in movable resistance with the elbow body 4;

[0055] Water seal compression ring 601 is rigidly connected with sealing seat 501 by bolts and compresses water seal rubber ring 602 to form axial constraint force. Water seal rubber ring 602 is made of butyronitrile rubber or fluorine rubber material and expands radially after being compressed to dynamically adhere to elbow body 4. When elbow body 4 swings, water seal rubber ring 602 compensates axial displacement through elastic deformation to maintain continuous contact sealing. Friction heat is generated by elbow movement, and rubber ring self-adapts wear through elastic restoring force to prevent medium leakage.

[0056] As shown in Figure 5 , Figure 6 and Figure 15 , as a preferred embodiment, on the basis of the above mode, further, the second connecting piece 7 includes a gland 701 fixedly connected with the slider seat 2, and a fastening bolt 702 is arranged between the gland 701 and the slider seat 2, and a wear-resistant compression ring 703 is fixedly arranged on the gland 701 and abuts against the slider body 201 and the rotating flange 303.

[0057] The gland 701 is rigidly connected with the slider seat 2 by the fastening bolt 702 to form an axial constraint structure, and the wear-resistant compression ring 703 is made of tungsten carbide or ceramic composite material and is fixedly arranged on the inner side of the gland 701 and rotates and frictionally cooperates with the slider body 201 and the rotating flange 303. The gland 701 compresses the wear-resistant compression ring 703 by bolt pre-tightening force to keep constant contact pressure with the moving parts, and the fastening bolt 702 can be loosened to quickly replace the worn wear-resistant compression ring 703 without disassembling the whole slider seat 2.

[0058] As shown in Figure 5 , Figure 6 and Figure 15 , as a preferred embodiment, on the basis of the above mode, further, the slider body 201 is fixedly provided with a wedge block 2013, and the guide rail 1 is fixedly provided with a wedge limiting block 9 which movably abuts against the wedge block 2013. An initial gap of 0.5-1mm is reserved between the two wedge surfaces, and when contacted, the wedge limiting block 9 is contacted by the wedge block 2013 to realize progressive braking through inclined surface component force. When the slider seat 2 is over-traveling, the wedge block 2013 preferentially contacts the wedge limiting block 9 to decompose the horizontal impact force into axial pressure.

[0059] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8As shown, as a preferred embodiment, on the basis of the above-mentioned mode, further, the sliding seat 202 is fixed with a wheel groove 10, a pulley 1001 is rotatably connected in the wheel groove 10, and the pulley 1001 is slidably connected with a steel wire rope of a winch mechanism on the ship body; when the winch pulls the steel wire rope, the pulley 1001 converts sliding friction into rolling friction, and the contact surface between the steel wire rope and the pulley 1001 should be designed as a V-shaped groove, and the rope diameter matching tolerance is ±0.5mm to reduce the risk of slippage.

[0060] The application further discloses a use method of the sleeve type elbow sliding block device, and the method comprises the following steps:

[0061] S1: connecting the pulley 1001 with the steel wire rope of the winch mechanism, hanging the sliding block seat 2 to the ship body guide rail 1 through the mounting frame 203, hingedly connecting the arm frame 304 with the rake arm, fixing the elbow body 4 with the flange end through bolts and the wear-resistant pipe 305, and placing the other end of the elbow body 4 in the elbow sleeve 302 and the rotating flange 303;

[0062] S2: injecting compressed air into the pressurizing channel of the dynamic sealing ring 504, so that the dynamic sealing ring 504 is expanded and tightly attached to the outer gasket 502 and the suction wear-resistant ring 503, the sealing surface of the dynamic sealing ring 504 is tightly attached to the ship body side suction inlet, the underwater pump is started, and the sand is transported to the mud tank through the elbow body 4;

[0063] S3: when the rake arm is operated, the elbow body 4 rotates in the elbow sleeve 302, the rotating flange 303 rotates in the surrounding groove 8, the wear-resistant gasket 2012 and the wear-resistant compression ring 703 are used for double wear reduction, the wedge-shaped block 2013 cooperates with the wedge-shaped limiting block 9 to limit the displacement of the sliding block seat 2;

[0064] S4: when the elbow body 4 needs to be disassembled and replaced due to damage, the connecting bolts of the flange end of the elbow body 4 and the wear-resistant pipe 305 are removed, and the worn elbow body 4 is directly extracted, without disassembling the first connecting piece 5, the sealing piece 6 and the second connecting piece 7;

[0065] S5: inserting a new elbow body 4 into the elbow sleeve 302 and the rotating flange 303, screwing the flange end of the elbow body 4 and the inner cavity formed by the wear-resistant pipe 305, and re-pressurizing the dynamic sealing ring 504, so that the elbow body 4 is quickly put into use.

[0066] The drawings in the specification of the application are only of a schematic nature, and the size and shape of each component shown are not actual limits, but only a schematic representation. In the actual implementation process, each component can be reasonably configured and adjusted according to specific needs and actual conditions.

[0067] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A sleeve type bending tube slider device, comprising a slider seat (2) sliding on a guide rail (1) outside the hull, characterized in that: Also includes: A hinge arm structure (3), the hinge arm structure (3) being rotatably connected to the slider seat (2), and a bent pipe body (4) being provided in the hinge arm structure (3); A first connecting member (5), the first connecting member (5) being fixedly mounted on one side of the slider seat (2) and rotatably connected to the elbow body (4); A sealing member (6), the sealing member (6) being fixedly connected to the first connecting member (5) and used for sealing the gap between the elbow body (4) and the first connecting member (5); and a second connecting member (7), wherein the second connecting member (7) is fixedly connected to the slider seat (2); One end of the hinge arm structure (3) is rotatably disposed in an enclosing groove (8) formed by the slider seat (2), the first connecting member (5) and the second connecting member (7); The slider seat (2) comprises a slider body (201), a slider seat (202) fixed on both sides of the slider body (201) and slidably connected to the guide rail (1), and a mounting frame (203) fixed on the upper side of the slider body (201); the slider body (201) is provided with an opening (2011) that matches the movable end of the elbow body (4); and the slider body (201) is provided with a wear-resistant lining ring (2012) fixed on the inner side of the surrounding groove (8); The hinge arm structure (3) comprises a U-shaped seat (301), a bend sleeve (302) fixedly arranged on the inner side of the U-shaped seat (301), a rotating flange (303) fixedly arranged at the end of the bend sleeve (302), a hinge arm frame (304) fixedly arranged at both ends of the U-shaped seat (301) and rotatably connected to the rake arm, and a wear-resistant pipe (305) arranged between the two hinge arm frames (304) via a fixing plate (3041); one end of the bend pipe body (4) is provided with a flange; the end of the bend pipe body (4) with the flange is fixedly connected to the wear-resistant pipe (305) via bolts; and the end of the bend pipe body (4) away from the flange is placed in the bend sleeve (302) and the rotating flange (303).

2. A sleeve type pipe bending slider device according to claim 1, characterized in that: The first connecting member (5) comprises a sealing seat (501) and an outer liner (502) fixedly connected to the slider seat (2) by bolts, a suction port wear-resistant ring (503) fixedly arranged on the sealing seat (501), and a dynamic sealing ring (504) arranged between the suction port wear-resistant ring (503) and the outer liner (502), wherein the suction port wear-resistant ring (503) is connected to the slider seat (2) and the dynamic sealing ring (504).

3. A sleeve type pipe bending slider device according to claim 2, characterized in that: The dynamic sealing ring (504) is configured as a pneumatic sealing ring, and a gas pressurization channel is provided in the dynamic sealing ring (504). After the gas pressurization channel is pressurized, the outer side wall of the dynamic sealing ring (504) is tightly fitted to the outer liner (502) and the suction port wear-resistant ring (503).

4. A sleeve type pipe bending slider device according to claim 3, characterized in that: The sealing member (6) comprises a water-sealing pressure ring (601) fixedly connected to the sealing seat (501) via bolts, and a water-sealing rubber ring (602) arranged between the water-sealing pressure ring (601) and the sealing seat (501), wherein the water-sealing rubber ring (602) movably contacts the elbow body (4).

5. A sleeve type pipe bending slider device according to claim 4, characterized in that: The second connecting member (7) includes a pressure cover (701) fixedly connected to the slider seat (2), a fastening bolt (702) is provided between the pressure cover (701) and the slider seat (2), and a wear-resistant pressure ring (703) is fixedly provided on the pressure cover (701) to abut against the slider body (201) and the rotating flange (303).

6. A sleeve type pipe bending slider device according to claim 5, characterized in that: A wedge-shaped block (2013) is fixedly provided on the slider body (201), and a wedge-shaped limiting block (9) that movably contacts the wedge-shaped block (2013) is fixedly provided on the guide rail (1).

7. A sleeve type pipe bending slider device according to claim 6, characterized in that: A wheel groove (10) is fixedly provided on the sliding seat (202), and a pulley (1001) is rotatably connected in the wheel groove (10) via a rotating shaft, and the pulley (1001) is slidably connected to a steel wire rope of a winch mechanism on the hull.

8. A method for using the sleeve-type pipe bending slider device according to claim 7, characterized in that: The following steps are involved: S1: Connect the pulley (1001) to the wire rope of the winch mechanism, mount the slider seat (2) to the hull guide rail (1) through the mounting frame (203), hinge the arm frame (304) to the rake arm, fix the flange end of the bend pipe body (4) to the wear-resistant pipe (305) through bolts, and place the other end of the bend pipe body (4) in the bend pipe sleeve (302) and the rotating flange (303); S2: Compressed air is injected into the pressurized channel of the dynamic sealing ring (504) to expand it and tightly fit the outer lining ring (502) and the suction port wear ring (503). The sealing surface of the dynamic sealing ring (504) is tightly fitted with the suction port on the side of the hull. The underwater pump is started and the sand and soil are transported to the mud tank through the elbow body (4); S3: When the rake arm is in operation, the elbow body (4) rotates together with the elbow sleeve (302), and the rotating flange (303) rotates in the surrounding groove (8). The wear-resistant lining (2012) and the wear-resistant pressure ring (703) are used to reduce wear. The wedge block (2013) cooperates with the inclined surface of the wedge-shaped limit block (9) to limit the displacement of the slider seat (2); S4: When the elbow body (4) is damaged and needs to be disassembled and replaced, the connecting bolts between the flange end of the elbow body (4) and the wear-resistant tube (305) are removed, and the worn elbow body (4) is directly pulled out without disassembling the first connecting piece (5), the sealing piece (6) and the second connecting piece (7); S5: Insert the new elbow body (4) into the inner cavity formed by the elbow sleeve (302) and the rotating flange (303), fix the flange end of the elbow body (4) and the wear-resistant tube (305) with bolts, and re-pressurize the dynamic sealing ring (504) to quickly put the elbow body (4) into use.

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