Hydraulic dismounting device and cutter suction dredger

Abstract

The hydraulic dismounting device comprises a fixing frame, a twisting disc, a twisting frame, a positioning piece and a pair of oil cylinders. The twisting disc is rotatably arranged relative to the fixing frame about a rotation axis. The twisting disc comprises a fastening hole and a first positioning hole. The twisting frame is rotatably arranged relative to the fixing frame about the rotation axis. The twisting frame comprises an accommodating cavity formed in the inside thereof. The twisting frame comprises a shaft hole, a dismounting opening and a second positioning hole. The shaft hole is arranged through along the rotation axis. The dismounting opening is communicated to the accommodating cavity. The positioning piece is detachably connected to the first positioning hole and the second positioning hole. The pair of oil cylinders are arranged on two sides of the twisting frame along a horizontal direction and are centrally symmetric about the rotation axis, and the pair of oil cylinders are oppositely directed. The cylinder body of the oil cylinder is rotatably connected to the fixing frame. The telescopic rod of the oil cylinder is rotatably connected to the twisting frame. The hydraulic dismounting device can be used in occasions requiring large torque to dismount a cutter.

Description

Technical Field

[0001] This disclosure generally relates to the technical field of dredging machinery, and more specifically to a hydraulic dismantling device and a cutter suction dredger. Background Technology

[0002] Cutter suction dredgers (also known as cutter suction dredgers) use cutter heads to excavate underwater clay, coral reefs, and high-strength weathered rock. The cutter head is typically mounted on the cutter shaft via a threaded connection. A motor transmits power to the cutter shaft through a reducer, driving the cutter head to rotate. Under different working conditions or when the cutter head is severely worn, it needs to be replaced. However, for high-powered cutter suction dredgers, the working conditions underwater are extremely harsh and complex. Mud may enter the threaded connection between the cutter head and the cutter shaft. After prolonged high-power torque transmission, severe seizing may occur, making it difficult to disassemble the cutter head using traditional methods such as reversing the motor.

[0003] Therefore, there is a need to provide a hydraulic dismantling device and a cutter suction dredger to at least partially solve the above problems. Utility Model Content

[0004] The utility model description section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above problems, a first aspect of this disclosure provides a hydraulic disassembly device, the hydraulic disassembly device comprising:

[0006] Fixture;

[0007] A torsion disc, rotatably disposed relative to the fixed frame about a rotation axis, the torsion disc including a fastening hole and a first positioning hole, the fastening hole being adapted to connect to an adjacent shaft, the distance between the first positioning hole and the rotation axis being greater than the distance between the fastening hole and the rotation axis;

[0008] A torsion frame is rotatably disposed relative to a fixed frame about a rotation axis. The interior of the torsion frame is formed with a receiving cavity suitable for accommodating the torsion disk. The torsion frame includes a shaft hole, a disassembly port, and a second positioning hole. The shaft hole is disposed through the rotation axis to accommodate a shaft. The disassembly port is located on one side of the fixed frame in the vertical direction and communicates with the receiving cavity to allow the torsion disk to pass through.

[0009] A positioning element, detachably connected to the first positioning hole and the second positioning hole, for connecting the torsion frame to the torsion disc; and

[0010] A pair of hydraulic cylinders are located on both sides of the torsion frame along the horizontal direction of the fixed frame and are centrally symmetrical about the rotation axis. The horizontal direction intersects the rotation axis. The cylinder body of the hydraulic cylinder is rotatably connected to the fixed frame, and the telescopic rod of the hydraulic cylinder is rotatably connected to the torsion frame. The pair of hydraulic cylinders are used to apply forces in opposite directions to the torsion frame.

[0011] According to the hydraulic disassembly device of the first aspect of this disclosure, by providing a disassembly port on one side of the torsion frame, the torsion disc can be more quickly assembled into the receiving cavity of the torsion frame. Then, with the torsion disc in the receiving cavity, it is connected to the adjacent shaft. Since the positioning member is detachable from the first positioning hole and the second positioning hole respectively, by connecting the first positioning hole and the second positioning hole with the positioning member and operating the hydraulic cylinder, the torsion disc can be driven to rotate to disassemble the auger; by disengaging the positioning member from at least one of the first positioning hole and the second positioning hole, the auger can be driven to rotate by a power source such as a motor. Moreover, compared to the torque provided by using the reverse torque of a motor, the hydraulic cylinder in this technical solution can provide a greater torque, and can be used in situations where a large torque is required to disassemble the auger.

[0012] Optionally, the torsion frame includes:

[0013] Two torsion plates arranged opposite each other along the rotation axis, each torsion plate having the shaft hole, at least one of the two torsion plates having the second positioning hole, and the distance between the two torsion plates being greater than the thickness of the torsion disc; and

[0014] A connecting portion is provided between the two torsion plates. The connecting portion extends at least in a direction parallel to the circumference of the shaft hole and is not closed. The minimum distance between the two ends of the connecting portion is greater than the outer diameter of the torsion disc to define a portion of the disassembly / assembly port. The connecting portion and the two torsion plates enclose the receiving cavity.

[0015] Optionally, the connecting portion includes:

[0016] A first connecting segment includes an arcuate plate extending circumferentially along the outer side of the shaft hole, the surface of which intersects the torsion plate.

[0017] A pair of second connecting segments are disposed opposite to each other on both sides of the first connecting segment, and the pair of second connecting segments are respectively arranged corresponding to the two ends of the first connecting segment. The second connecting segment is a bent plate, and the plate surface of the bent plate intersects with the torsion plate.

[0018] Optionally, the second connecting segment and the first connecting segment are connected as a single unit.

[0019] Optionally, each of the two torsion plates includes two hinge holes, one of the two hinge holes is connected to the telescopic rod of one of the two hydraulic cylinders, and the other of the two hinge holes is connected to the telescopic rod of the other of the two hydraulic cylinders. The second connecting section is located between the shaft hole and the hinge hole, and the second connecting section is spaced apart from the shaft hole and the hinge hole respectively.

[0020] The disassembly / assembly port is located on one side of the plane containing the center lines of the two hinge holes.

[0021] Optionally, the torsion plate includes:

[0022] The main body portion, wherein the main body portion is provided with the shaft hole and the second positioning hole; and

[0023] Two ear plates are disposed opposite each other on both sides of the main body along the radial direction of the shaft hole. One end of the ear plate away from the main body is rotatably connected to the telescopic rod of one of the hydraulic cylinders, and the other end of the ear plate away from the main body is rotatably connected to the telescopic rod of the other hydraulic cylinder.

[0024] Optionally, the second positioning hole is located between the shaft hole and the ear plate portion along the radial direction of the shaft hole; and / or

[0025] The number of the second positioning holes is two sets, and the two sets of the second positioning holes are arranged opposite to each other on both sides of the shaft hole.

[0026] Optionally, the number of the first positioning holes is multiple, and the multiple first positioning holes are arranged at intervals along the circumferential direction of the torsion disc; and / or

[0027] At least one of the two end faces of the torsion disc along a direction parallel to the axis of rotation is provided with an annular groove, the annular groove extends along the circumference of the torsion disc, and there are multiple fastening holes, which are spaced apart along the circumference of the torsion disc in the annular groove. The first positioning hole is located outside the annular groove, and the annular groove is adapted to receive a flange of the shaft.

[0028] Optionally, the hydraulic disassembly device further includes:

[0029] At least three rotary guides are arranged at intervals along the circumferential direction of the torsion disc on the outer side of the torsion frame. Each rotary guide includes a guide groove adapted to receive a portion of the torsion frame to guide rotation of the torsion frame.

[0030] At least three protective components are arranged at intervals along the circumferential direction of the torsion disc on the outer periphery of the torsion frame and connected to the torsion frame. Each of the protective components is arranged in a one-to-one correspondence with each of the rotating guide components. The hardness of the protective component is less than the hardness of the rotating guide component.

[0031] Optionally, the hydraulic disassembly device further includes a position sensor located on the torsion frame and arranged corresponding to the second positioning hole, the position sensor being triggered when the positioning member is inserted into the second positioning hole.

[0032] A second aspect of this disclosure provides a cutter suction dredger, the cutter suction dredger comprising:

[0033] Cable tray;

[0034] First axis;

[0035] The second axis; and

[0036] In the aforementioned hydraulic disassembly device, the fixing frame is fixed to the bridge frame, and the torsion disc is connected to the first shaft and the second shaft.

[0037] According to the cutter suction dredger of the second aspect of this disclosure, by applying the above-mentioned hydraulic disassembly device, it is not only convenient to disassemble and assemble the first shaft and the second shaft, but also to provide greater torque for the disassembly of the cutter head, making the disassembly of the cutter head smoother, and also helps to protect the power source of the cutter head and extend its service life. Attached Figure Description

[0038] The following drawings, which illustrate embodiments of this disclosure, are incorporated herein by reference as part of this disclosure and are used to understand this disclosure. The drawings show embodiments of this disclosure and their descriptions, serving to explain the principles of this disclosure. In the drawings,

[0039] Figure 1 This is a front view of a hydraulic disassembly device without a mounting bracket according to one embodiment of the present disclosure;

[0040] Figure 2 for Figure 1 The figure shows a top view of the hydraulic disassembly device without the fixing frame, connected to the first and second shafts. Only a portion of the first and second shafts are shown in the figure.

[0041] Figure 3This is a perspective view of a hydraulic disassembly device including a fixing frame according to an embodiment of the present disclosure in a state connected to a second axis; only a portion of the second axis is shown in the figure.

[0042] Figure 4 This is a partial cross-sectional view of the connection between the torsion frame, torsion disc, first shaft, and second shaft according to one embodiment of the present disclosure;

[0043] Figure 5 A front view of a torsion frame according to one embodiment of the present disclosure;

[0044] Figure 6 for Figure 5 A top view of the torsion frame shown;

[0045] Figure 7 For along Figure 6 The cross-sectional view cut by line AA in the middle

[0046] Figure 8 for Figure 5 A perspective view of the torsion frame shown;

[0047] Figure 9 for Figure 5 Another perspective view of the torsion frame shown;

[0048] Figure 10 A perspective view of a torsion disc according to one embodiment of the present disclosure; and

[0049] Figure 11 This is a schematic diagram of the structure of a rotary guide member according to an embodiment of the present disclosure in a state connected to a guide support.

[0050] Explanation of reference numerals in the attached figures:

[0051] 100: Fixture; 101: First support

[0052] 102: Second support; 102a: Second lug

[0053] 103: Guide support; 110: Torsion plate

[0054] 111: Fastening hole; 112: First positioning hole

[0055] 113: Annular groove; 114: Weight reduction hole

[0056] 120: Torsion frame; 121: Receiving cavity

[0057] 122: Assembly / Disassembly port; 123: Torsion plate

[0058] 124: Main body; 124a: Shaft hole

[0059] 124b: Second positioning hole; 125: Ear plate portion

[0060] 125a: Hinge hole; 126: Connecting part

[0061] 126a: First connecting segment; 126b: Second connecting segment

[0062] 127: Protective component; 128: First lifting lug

[0063] 130: Rotary guide component; 131: Guide groove

[0064] 132: Guide block; 133: Limit block

[0065] 141: First hydraulic cylinder; 142: Second hydraulic cylinder

[0066] 151: First shaft; 151a: First flange

[0067] 152: Second shaft; 152a: Second flange

[0068] 153: Connecting bolt; AX: Rotation axis

[0069] AX1: First axis; AX2: Second axis

[0070] AX3: Third axis; AX4: Fourth axis

[0071] D1: Horizontal direction; D2: Axial direction

[0072] D3: vertical direction Detailed Implementation

[0073] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of this disclosure. However, it will be apparent to those skilled in the art that embodiments of this disclosure may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with embodiments of this disclosure.

[0074] To fully understand the embodiments of this disclosure, a detailed structure will be presented in the following description. It is obvious that the implementation of the embodiments of this disclosure is not limited to the specific details familiar to those skilled in the art.

[0075] It should be understood that the terminology used herein is intended only to describe particular embodiments and is not intended to limit the scope of this disclosure. The singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. When the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0076] Ordinal numbers such as “first” and “second” used in this disclosure are merely identifiers and have no other meaning, such as a specific order. Furthermore, for example, the term “first component” does not imply the existence of a “second component,” nor does the term “second component” imply the existence of a “first component.” It should be noted that the terms “upper,” “lower,” “front,” “rear,” “left,” “right,” “inner,” “outer,” and similar expressions used in this disclosure are for illustrative purposes only and are not intended to be limiting.

[0077] The terms “center,” “parallel,” “perpendicular,” “aligned,” and “symmetrical” used in this disclosure are not necessarily precise, but may include typical engineering tolerances.

[0078] Hereinafter, specific embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings, which illustrate representative embodiments of the present disclosure and are not intended to limit the present disclosure.

[0079] To facilitate routine maintenance and disassembly of the cutter head, two main technologies are employed: 1) Installing a three-piece ring or a combustion ring at the connection between the cutter head and the cutter shaft. During disassembly, the three-piece ring or combustion ring is first removed, dislodging the cutter head from its threaded connection and allowing the motor to rotate the cutter shaft in the opposite direction to its operating operation. The three-piece ring is suitable for applications with lower cutter power, but as the power of cutter heads in cutter suction dredgers increases, it becomes insufficient. The combustion ring is suitable for high-power applications. However, its removal requires destructive methods, such as flame cutting, which consumes significant time and poses risks to personnel and equipment. Furthermore, considering the harsh and complex underwater working conditions, mud may enter the trapezoidal thread connecting the cutter head and shaft. After prolonged high-power torque transmission, this could lead to severe seizing, creating unpredictable risks during disassembly.

[0080] In order to adapt to the current trend of increasing cutter power in cutter suction dredgers and improve the use of equipment and construction efficiency on board, it is necessary to use high torque methods to disassemble high-power cutter cutters.

[0081] In response to the shortcomings and disadvantages of the two main existing cutter head disassembly methods, namely the three-ring and combustion ring structures, a hydraulic disassembly device was proposed to adapt to the development trend of larger and more intelligent cutter suction dredgers. This device has already been applied on a super-powerful cutter suction dredger.

[0082] See Figures 1 to 11This disclosure provides a hydraulic disassembly device. The hydraulic disassembly device includes a fixed frame 100, a torsion disc 110, a torsion frame 120, a positioning element, and a pair of cylinders. The torsion disc 110 is rotatably disposed relative to the fixed frame 100 about a rotation axis AX. The axis of the torsion disc 110 coincides with the rotation axis AX. The direction parallel to the rotation axis AX can be referred to as axial direction D2. The torsion disc 110 includes a fastening hole 111 and a first positioning hole 112. The fastening hole 111 is adapted to be bolted to an adjacent shaft. Here, the adjacent shaft can be understood as the two adjacent shafts constituting the auger shaft, namely the first shaft 151 and the second shaft 152, which will be described below. The distance between the first positioning hole 112 and the rotation axis AX is greater than the distance between the fastening hole 111 and the rotation axis AX. The torsion frame 120 is rotatably disposed relative to the fixed frame 100 about a rotation axis AX. The interior of the torsion frame 120 has a receiving cavity 121 adapted to accommodate the torsion disc 110. The torsion frame 120 includes a shaft hole 124a, a disassembly / assembly port 122, and a second positioning hole 124b. The shaft hole 124a is provided through along the rotation axis AX to accommodate a shaft. Here, the shaft is the shaft mentioned above as "adjacent shaft". The disassembly / assembly port 122 is located on one side of the fixed frame 100 in the vertical direction D3 and communicates with the receiving cavity 121 for the torsion disk 110 to pass through. The vertical direction D3 can be understood as the vertical direction or the height direction. Positioning elements are detachably connected to the first positioning hole 112 and the second positioning hole 124b to connect the torsion frame 120 to the torsion disk 110. A pair of hydraulic cylinders are located on both sides of the torsion frame 120 along the horizontal direction D1 of the fixed frame 100 and are centrally symmetrical about the rotation axis AX. It can be understood that in geometry, if there exists a point (called the center of symmetry) such that figure A can completely coincide with figure B after rotating 180° around this point, then figure A and figure B are said to be centrally symmetrical about this point. In an embodiment of this application, a pair of hydraulic cylinders includes two cylinders. When viewed along a direction parallel to the rotation axis AX, the projection of one cylinder, when rotated 180° around the rotation axis AX, coincides with the projection of the other cylinder, meaning the two cylinders are centrally symmetrical about the rotation axis AX. That is, the two cylinders in the pair face opposite directions, and the extension and retraction directions of their respective telescopic rods are opposite to each other. The horizontal direction D1 intersects the rotation axis AX. The cylinder body is rotatably connected to the fixed frame 100. The telescopic rod of the cylinder is rotatably connected to the torsion frame 120. The pair of cylinders are used to apply opposite forces to the torsion frame 120.

[0083] In use, the torsion disc 110 is first inserted into the receiving cavity 121 of the torsion frame 120 through the disassembly port 122. Then, the first positioning hole 112 and the second positioning hole 124b are connected through the positioning component to complete the positioning of the torsion disc 110 and the torsion frame 120. The assembly of the torsion frame 120 and the torsion disc 110 is then connected to the adjacent shafts by bolts and to the two hydraulic cylinders.

[0084] According to the hydraulic disassembly device of the present disclosure, by providing a disassembly port 122 on one side of the torsion frame 120, the torsion disc 110 can be more quickly assembled into the receiving cavity 121 of the torsion frame 120. Then, with the torsion disc 110 located in the receiving cavity 121, it is connected to the adjacent shaft. Since the positioning member is detachable from the first positioning hole 112 and the second positioning hole 124b respectively, by connecting the first positioning hole 112 and the second positioning hole 124b with the positioning member and making the cylinder work, the torsion disc 110 can be driven to rotate to disassemble the auger; by disengaging the positioning member from at least one of the first positioning hole 112 and the second positioning hole 124b, the auger can be driven to rotate by a power source such as a motor. Moreover, compared with the torque provided by the reverse rotation of the motor, the hydraulic cylinder used in this technical solution can provide greater torque, and can be used in situations where a large torque is required to disassemble the auger.

[0085] See Figures 1 to 3 In some embodiments, a pair of cylinders includes two cylinders. The two cylinders are controlled synchronously during use. The two cylinders have the same working stroke and provide the same magnitude of force, thus forming a couple, the direction of which is opposite to the rotation direction of the auger during normal operation. When disassembling the auger using this hydraulic disassembly device, the torsion disc 110 is connected to the auger shaft, and other tooling or equipment is needed to temporarily lock the auger to prevent it from rotating with the auger shaft.

[0086] See Figures 2 to 4 ,as well as Figures 6 to 9 In some embodiments, the torsion frame 120 includes a torsion plate 123 and a connecting portion 126. There are two torsion plates 123. The two torsion plates 123 are arranged opposite each other along the rotation axis AX. Both torsion plates 123 are provided with shaft holes 124a. The shaft holes 124a of the two torsion plates 123 are aligned along the rotation axis AX. At least one of the two torsion plates 123 is provided with a second positioning hole 124b. The distance between the two torsion plates 123 is greater than the thickness of the torsion disk 110. The connecting portion 126 connects the two torsion plates 123. The connecting portion 126 extends at least in a direction parallel to the circumference of the shaft holes 124a and is not closed. The minimum distance between the two ends of the connecting portion 126 is greater than the outer diameter of the torsion disk 110 to define a partial disassembly / reassembly opening 122. The connecting portion 126 and the two torsion plates 123 enclose a receiving cavity 121. This arrangement facilitates the separate fabrication of the torsion plate 123 and the connecting part 126, which can then be spliced ​​or assembled together, thus improving manufacturing precision and flexibility.

[0087] Optionally, the torsion plate 123 and the connecting part 126 are fixed together by welding or other methods.

[0088] In some other embodiments, the torsion plate 123 and the connecting portion 126 may be manufactured by integral molding such as casting.

[0089] See Figures 6 to 9 In some embodiments, the connecting portion 126 includes a first connecting segment 126a and a pair of second connecting segments 126b. The first connecting segment 126a includes an arc-shaped plate extending circumferentially from the outside of the shaft hole 124a. The surface of the arc-shaped plate intersects the torsion plate body 123. A pair of second connecting segments 126b are disposed opposite to each other on both sides of the first connecting segment 126a. The pair of second connecting segments 126b are respectively arranged corresponding to the two ends of the first connecting segment 126a. The second connecting segments 126b are bent plates. The surface of the bent plates intersects the torsion plate body 123. By adopting the construction of the connecting portion 126 of this embodiment, material costs and weight can be reduced.

[0090] See Figure 7 Optionally, the second connecting segment 126b is connected to the first connecting segment 126a as a single piece. The first connecting segment 126a and the second connecting segment 126b are different parts of the same bent plate, that is, they are made of the same metal plate.

[0091] See Figure 4 , Figure 5 ,as well as Figures 7 to 9 For example, each of the two torsion plates 123 includes two hinge holes 125a. One of the two hinge holes 125a is connected to the telescopic rod of one of the two hydraulic cylinders. The other of the two hinge holes 125a is connected to the telescopic rod of the other of the two hydraulic cylinders. A second connecting segment 126b is located between the shaft hole 124a and the hinge hole 125a. The second connecting segment 126b is spaced apart from both the shaft hole 124a and the hinge hole 125a. The disassembly port 122 is located on one side of the plane containing the center lines of the two hinge holes 125a.

[0092] See Figure 2 , Figure 4 , Figure 7 as well as Figure 9 Optionally, the disassembly port 122 is located on the lower side of the plane containing the center lines of the two hinge holes 125a.

[0093] See Figure 1 Optionally, when the two cylinders return to their initial state (the telescopic rod is not extended), the plane containing the center lines of the two hinge holes 125a is perpendicular to the vertical direction D3. When the two cylinders are working and the telescopic rod is extended to its maximum stroke, the plane containing the center lines of the two hinge holes 125a is inclined to the vertical direction D3.

[0094] Optionally, the center line of the shaft hole 124a and the center lines of the two hinge holes 125a are coplanar.

[0095] See Figure 5 For example, the torsion plate 123 includes a main body 124 and two ear plates 125. The main body 124 is provided with a shaft hole 124a and a second positioning hole 124b. The two ear plates 125 are disposed opposite each other on both sides of the main body 124 along the radial direction of the shaft hole 124a. One end of one ear plate 125 away from the main body 124 is rotatably connected to the telescopic rod of a hydraulic cylinder. The other end of the other ear plate 125 away from the main body 124 is rotatably connected to the telescopic rod of another hydraulic cylinder. When the telescopic rod of the hydraulic cylinder is fully retracted, the two ear plates 125 are located on both sides of the main body 124 in the horizontal direction D1. This facilitates the removal of the positioning element after each extension of the telescopic rod and the reinstallation of the positioning element after the telescopic rod retracts. By repeatedly removing and installing the positioning element and coordinating with the intermittent operation of the hydraulic cylinder, the torsion disc 110 can be intermittently driven to rotate.

[0096] Optionally, the main body 124 and the ear plate 125 are integrally formed.

[0097] See Figure 5 , Figures 7 to 9 Furthermore, the second positioning hole 124b is located between the shaft hole 124a and the ear plate portion 125 along the radial direction of the shaft hole 124a. In use, when the telescopic rod of the hydraulic cylinder retracts to its position, the second positioning hole 124b is located exactly to the side of the shaft hole 124a along the horizontal direction D1. Especially when the torsion disc 110 is connected to two adjacent shafts, compared with the arrangement of the second positioning hole 124b on the upper and lower sides of the shaft hole 124a, it is easier to realize the disassembly and assembly of the positioning component.

[0098] For example, there are two sets of second positioning holes 124b. The two sets of second positioning holes 124b are arranged opposite to each other on both sides of the shaft hole 124a.

[0099] See Figure 1 , Figure 5 ,as well as Figures 7 to 9 Optionally, each group of second positioning holes 124b includes two second positioning holes 124b. The two positioning holes in each group are located on opposite sides of the plane containing the center line of the hinge hole 125a and the center line of the shaft hole 124a, respectively.

[0100] In other examples, the number of second positioning holes 124b in each group can be one, three, or other numbers. To ensure the structural strength of the torsion frame 120, it is not recommended to provide too many second positioning holes 124b.

[0101] See Figure 1 and Figure 10For example, there are multiple fastening holes 111. These multiple fastening holes 111 are arranged at intervals along the circumferential direction of the torsion disk 110. There are also multiple first positioning holes 112. These multiple first positioning holes 112 are arranged at intervals along the circumferential direction of the torsion disk 110. By connecting the positioning element to different first positioning holes 112 via the second positioning hole 124b, multiple rotations of the torsion disk 110 can be achieved to compensate for the insufficient single-drive stroke of the hydraulic cylinder, ultimately driving the torsion disk 110 to rotate a predetermined angle. For different application scenarios, this predetermined angle is not unique; for a single application scenario, the predetermined angle is usually determined, but it is possible that the predetermined angle may differ under different working conditions. Therefore, the predetermined angle is the angle required for the torsion disk 110 to rotate so that the auger can be completely disassembled. At least one of the two end faces of the torsion disk 110 in a direction parallel to the rotation axis AX is provided with an annular groove 113. The annular groove 113 extends along the circumferential direction of the torsion disk 110. The fastening hole 111 is provided in the annular groove 113. The first positioning hole 112 is located on the outside of the annular groove 113. The annular groove 113 is adapted to accommodate a flange for a shaft, such as... Figure 3 As shown. This saves the space occupied by the torsion disc 110 along the axial direction D2 between adjacent shafts.

[0102] See Figure 10 Optionally, the torsion disk 110 has annular grooves 113 at both ends in a direction parallel to the rotation axis AX.

[0103] Continue reading Figure 10 For example, a weight-reducing hole 114 is provided at the center of the torsion disk 110 so that the torsion disk 110 is constructed as an annular disk.

[0104] In addition, the hydraulic dismantling device includes a position sensor (not shown). The position sensor is located on the torsion frame 120 and is arranged corresponding to the second positioning hole 124b. The position sensor is configured to be triggered when the positioning element is inserted into the second positioning hole 124b, thereby generating a presence signal indicating that the positioning element is in place. The presence signal disappears when the positioning element disengages from the second positioning hole 124b. The position sensor is used to connect to the control unit of the cutter suction dredger. The control unit controls the cutter head's power source to stop operating based on the presence signal fed back by the position sensor, and controls the power source to operate according to the user's control commands after the presence signal disappears. This helps improve the safety of cutter suction dredger operations and also protects the equipment.

[0105] Optionally, the first positioning hole 112 and the second positioning hole 124b described above are pin holes. The positioning element is a pin.

[0106] See Figures 1 to 3 ,as well as Figures 5 to 9To facilitate the hoisting and transportation of the torsion frame 120, the torsion frame 120 is provided with multiple first lifting lugs 128. Each torsion plate 123 has two first lifting lugs 128, which are arranged symmetrically about the rotation axis AX.

[0107] See Figures 1 to 3 , Figure 5 , Figure 8 , Figure 9 as well as Figure 11 In addition, the hydraulic disassembly device includes at least three rotating guides 130 and at least three protective members 127. The at least three rotating guides 130 are spaced apart along the circumferential direction of the torsion disc 110 on the outer side of the torsion frame 120. The rotating guides 130 are fixed relative to the fixed frame 100. Each rotating guide 130 includes a guide groove 131. The guide groove 131 is adapted to accommodate a portion of the torsion frame 120 to guide its rotation. The at least three protective members 127 are spaced apart along the circumferential direction of the torsion disc 110 on the outer periphery of the torsion frame 120 and connected to the torsion frame 120. Each protective member 127 corresponds one-to-one with each rotating guide 130. The hardness of the protective members 127 is less than that of the rotating guides 130. By providing the protective members 127, wear on the torsion frame 120 from the rotating guides 130 can be reduced, thereby protecting the torsion frame 120. Since the hardness of the protective component 127 is lower than that of the rotary guide component 130, the wear of the rotary guide component 130 can be reduced.

[0108] exist Figure 1 In the example shown, there are three rotary guides 130 and three protective elements 127.

[0109] Alternatively, the protective element 127 may be made of a wear-resistant material such as nylon. The rotary guide 130 may be made of a metallic material such as steel with a hardness greater than that of the protective element 127.

[0110] See Figure 1 , Figure 3 as well as Figure 11 In some embodiments, the hydraulic dismantling device further includes a guide support 103. The guide support 103 is detachably connected to the rotary guide 130 by fasteners such as bolts. The guide support 103 is adapted to be fixed to the mounting frame 100 or the bridge of the cutter suction dredger.

[0111] Exemplarily, the rotary guide 130 includes a guide block 132 and a pair of limiting blocks 133. The guide block 132 is generally U-shaped. The guide block 132 has a guide groove 131. The pair of limiting blocks 133 are arranged opposite to each other on both sides of the guide block 132 in a direction parallel to the rotation axis AX. The guide block 132 is used to contact the protective member 127. The limiting blocks 133 are used to bear force in a direction parallel to the rotation axis AX and to limit the guide block 132.

[0112] See Figure 3 For example, the mounting bracket 100 includes a first support 101 and a second support 102. The first support 101 and the second support 102 are arranged at a distance of D1 along a horizontal direction. Both the first support 101 and the second support 102 are used to fix to the cable tray. When the mounting surfaces of the first support 101 and the second support 102 on the cable tray are at the same height, the height of the first support 101 is less than the height of the second support 102. Two hydraulic cylinders are a first hydraulic cylinder 141 and a second hydraulic cylinder 142. The first hydraulic cylinder 141 is located below the plane containing the center lines of the hinge hole 125a and the shaft hole 124a. The cylinder body of the first hydraulic cylinder 141 is rotatably connected to the first support 101 about a first axis AX1. The telescopic rod of the first hydraulic cylinder 141 is rotatably connected to the torsion frame 120 about a second axis AX2. The second hydraulic cylinder 142 is located above the plane containing the center lines of the hinge hole 125a and the shaft hole 124a. The cylinder body of the second cylinder 142 is rotatably connected to the second support 102 about the third axis AX3. The telescopic rod of the second cylinder 142 is rotatably connected to the torsion frame 120 about the fourth axis AX4. The first axis AX1, the second axis AX2, the third axis AX3, and the fourth axis AX4 are all parallel to the rotation axis AX.

[0113] In some examples not shown, the first support 101 and the second support 102 may be fixed as a single piece.

[0114] See Figure 3 To facilitate the hoisting and transportation of the second support 102, the top of the second support 102 is provided with multiple second lifting lugs 102a. There are four second lifting lugs 102a. The four second lifting lugs 102a are arranged in a rectangular shape.

[0115] Although the figure only shows the second lug 102a installed on the second support 102, it can be understood that the first support 101 can also be equipped with a lug.

[0116] In summary, considering the high power density of hydraulic systems, this disclosure proposes a method for dismantling cutter heads by using hydraulic cylinders as a power source to drive the cutter shaft in reverse rotation. This method offers significant advantages over the two previous dismantling methods. Practical application has shown that the hydraulic dismantling device of this disclosure can dismantle cutter heads with power exceeding 10,000 kW. With the two hydraulic cylinders automatically controlled by a control device, the entire dismantling process is essentially automated, minimizing the need for manpower and greatly improving the efficiency of shipbuilding operations. This results in substantial economic benefits and a better user experience for the user.

[0117] In the embodiments of this disclosure, when the hydraulic dismantling device is working, the pin is installed in the pin hole, and the torsion frame 120 can drive the torsion disc 110 to rotate together. When the hydraulic dismantling device is not working, the pin is pulled out from the pin hole, and the torsion frame 120 does not rotate with the torsion disc 110, thus not affecting the normal operation of the auger. To prevent equipment malfunction and improve equipment safety, the pin position can be detected and interlocked with the equipment operation for protection.

[0118] In the embodiments of this disclosure, since the working stroke of the hydraulic cylinder is limited, it is usually impossible to disassemble the auger within one working stroke. Therefore, evenly distributed pin holes are designed along the entire circumference of the torsion disc 110, and a small number of pin holes are designed on both sides of the horizontal direction D1 of the torsion frame 120. After the hydraulic cylinder completes one working stroke, the torsion frame 120 and the torsion disc 110 are rotated synchronously through a certain angle. Then, the pin is pulled out, and the hydraulic cylinder is reset to rotate the torsion frame 120 in the opposite direction, so that the pin holes on the torsion frame 120 are aligned again with the pin holes on the torsion disc 110 and the pin is inserted. The hydraulic cylinder is then restarted. By repeating this operation, the purpose of disassembling the auger can be achieved.

[0119] In the embodiments of this disclosure, the torsion frame 120 employs at least three rotating guides 130 to achieve at least three-point positioning support during the torsion process, effectively preventing positional deviation of the torsion frame 120 during torsion operation. Due to the extremely large force, protective components 127 are added to the torsion frame 120 at each positioning support position, which can effectively improve the reliability and service life of the equipment.

[0120] Embodiments of this disclosure also provide a cutter suction dredger. The cutter suction dredger includes a bridge frame (not shown), a first shaft 151, a second shaft 152, and the aforementioned hydraulic disassembly device. The bridge frame can be understood as a steel frame capable of rotating and rotating about a pivot point together with the cutter head and cutter shaft. A fixing frame 100 is fixed to the bridge frame. A torsion disc 110 is connected to the first shaft 151 and the second shaft 152. The first shaft 151 and the second shaft 152 can be understood as two parts of the cutter shaft. For example, the first shaft 151 is used directly for cutter head connection, and the second shaft 152 is used for connecting a motor.

[0121] The first shaft 151 has a first flange 151a. The second shaft 152 has a second flange 152a. The first flange 151a, the torsion plate 110, and the second flange 152a are connected together by connecting bolts 153 and nuts. The connecting bolts 153 are hydraulic bolts for easy assembly and disassembly.

[0122] According to the embodiments of the present disclosure, the cutter suction dredger, by applying the above-mentioned hydraulic disassembly device, not only facilitates the disassembly and assembly of the first shaft 151 and the second shaft 152, but also provides greater torque for the disassembly of the cutter head, making the disassembly of the cutter head smoother, and also helps to protect the power source of the cutter head and extend its service life.

[0123] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this disclosure. Terms such as “setup” appearing herein can refer to either a component being directly attached to another component or a component being attached to another component via an intermediary. A feature described in one embodiment herein may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0124] This disclosure has been described through the above embodiments; however, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this disclosure to the described embodiments. Those skilled in the art will understand that many more variations and modifications can be made based on the teachings of this disclosure, all of which fall within the scope of protection claimed in this disclosure.

Claims

1. A hydraulic disassembly device, characterized in that, The hydraulic disassembly device includes: Fixture; A torsion disc, rotatably disposed relative to the fixed frame about a rotation axis, the torsion disc including a fastening hole and a first positioning hole, the fastening hole being adapted to connect to an adjacent shaft, the distance between the first positioning hole and the rotation axis being greater than the distance between the fastening hole and the rotation axis; A torsion frame is rotatably disposed relative to a fixed frame about a rotation axis. The interior of the torsion frame is formed with a receiving cavity suitable for accommodating the torsion disk. The torsion frame includes a shaft hole, a disassembly port, and a second positioning hole. The shaft hole is disposed through the rotation axis to accommodate a shaft. The disassembly port is located on one side of the fixed frame in the vertical direction and communicates with the receiving cavity to allow the torsion disk to pass through. A positioning element, detachably connected to the first positioning hole and the second positioning hole, for connecting the torsion frame to the torsion disc; and A pair of hydraulic cylinders are located on both sides of the torsion frame along the horizontal direction of the fixed frame and are centrally symmetrical about the rotation axis. The horizontal direction intersects the rotation axis. The cylinder body of the hydraulic cylinder is rotatably connected to the fixed frame, and the telescopic rod of the hydraulic cylinder is rotatably connected to the torsion frame. The pair of hydraulic cylinders are used to apply forces in opposite directions to the torsion frame.

2. The hydraulic disassembly device according to claim 1, characterized in that, The torsion frame includes: Two torsion plates arranged opposite each other along the rotation axis, each torsion plate having the shaft hole, at least one of the two torsion plates having the second positioning hole, and the distance between the two torsion plates being greater than the thickness of the torsion disc; and A connecting portion is provided between the two torsion plates. The connecting portion extends at least in a direction parallel to the circumference of the shaft hole and is not closed. The minimum distance between the two ends of the connecting portion is greater than the outer diameter of the torsion disc to define a portion of the disassembly / assembly port. The connecting portion and the two torsion plates enclose the receiving cavity.

3. The hydraulic disassembly device according to claim 2, characterized in that, The connecting part includes: A first connecting segment includes an arcuate plate extending circumferentially along the outer side of the shaft hole, the surface of which intersects the torsion plate. A pair of second connecting segments are disposed opposite to each other on both sides of the first connecting segment, and the pair of second connecting segments are respectively arranged corresponding to the two ends of the first connecting segment. The second connecting segment is a bent plate, and the plate surface of the bent plate intersects with the torsion plate.

4. The hydraulic disassembly device according to claim 3, characterized in that, The second connecting segment is connected to the first connecting segment as a single unit.

5. The hydraulic disassembly device according to claim 3, characterized in that, Each of the two torsion plates includes two hinge holes, one of the two hinge holes is connected to the telescopic rod of one of the two hydraulic cylinders, and the other of the two hinge holes is connected to the telescopic rod of the other of the two hydraulic cylinders. The second connecting section is located between the shaft hole and the hinge hole, and the second connecting section is spaced apart from the shaft hole and the hinge hole respectively. The disassembly / assembly port is located on one side of the plane containing the center lines of the two hinge holes.

6. The hydraulic disassembly device according to claim 5, characterized in that, The torsion plate includes: The main body portion, wherein the main body portion is provided with the shaft hole and the second positioning hole; and Two ear plates are disposed opposite each other on both sides of the main body along the radial direction of the shaft hole. One end of the ear plate away from the main body is rotatably connected to the telescopic rod of one of the hydraulic cylinders, and the other end of the ear plate away from the main body is rotatably connected to the telescopic rod of the other hydraulic cylinder.

7. The hydraulic disassembly device according to claim 1, characterized in that, The number of the first positioning holes is multiple, and the multiple first positioning holes are arranged at intervals along the circumferential direction of the torsion disc; and / or At least one of the two end faces of the torsion disc along a direction parallel to the axis of rotation is provided with an annular groove, the annular groove extends along the circumference of the torsion disc, and there are multiple fastening holes, which are spaced apart along the circumference of the torsion disc in the annular groove. The first positioning hole is located outside the annular groove, and the annular groove is adapted to receive a flange of the shaft.

8. The hydraulic disassembly device according to claim 1, characterized in that, The hydraulic disassembly device also includes: At least three rotary guides are arranged at intervals along the circumferential direction of the torsion disc on the outer side of the torsion frame. Each rotary guide includes a guide groove adapted to receive a portion of the torsion frame to guide rotation of the torsion frame. At least three protective components are arranged at intervals along the circumferential direction of the torsion disc on the outer periphery of the torsion frame and connected to the torsion frame. Each of the protective components is arranged in a one-to-one correspondence with each of the rotating guide components. The hardness of the protective component is less than the hardness of the rotating guide component.

9. The hydraulic disassembly device according to claim 1, characterized in that, The hydraulic disassembly device further includes a position sensor located on the torsion frame and arranged corresponding to the second positioning hole. The position sensor is triggered when the positioning element is inserted into the second positioning hole.

10. A cutter suction dredger, characterized in that, The cutter suction dredger includes: Cable tray; First axis; The second axis; and The hydraulic disassembly device according to any one of claims 1 to 9, wherein the fixing frame is fixed to the bridge frame, and the torsion disc is connected to the first shaft and the second shaft.

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