Dredging crane below wharf

Abstract

The invention relates to the technical field of desilting equipment, in particular to a desilting crane below a wharf, the interior of a base is of a hollow structure, and a bearing seat is embedded in a top opening of the base; the rotary gear is mounted on the rotary main shaft and arranged in the base, the lower end of the rotary main shaft is rotationally mounted at the bottom of the base through a conical bearing, and the rotary main shaft is rotationally connected with the bearing seat through the conical bearing; the rotary rack is in meshing drive with the rotary gear, the rotary rack is movably arranged in the oil cylinder barrel, and the two ends of the oil cylinder barrel penetrate through the base and then are provided with end covers with oil way through holes; and the rotating table is sleeved on the rotating main shaft through a main shaft mounting seat on a bottom plate of the rotating table. A variable-amplitude oil cylinder is matched with a hydraulic rack oil cylinder (a rotation rack, an oil cylinder barrel, a rotation gear and the like), so that the lifting rotation of the arm support is realized, and the adjustment of various working states is realized.

Description

Technical Field

[0001] The invention relates to the technical field of dredging equipment, and in particular to a dredging crane under a dock. Background Art

[0002] At present, the space under the high-pile wharf is narrow, resulting in problems such as failure to operate normally when using existing dredging equipment for dredging, making the operation difficult and the dredging efficiency low. Summary of the invention

[0003] The purpose of the present invention is to provide a dredging crane under a dock to address the defects and shortcomings of the prior art, which can solve the above-mentioned defects.

[0004] To achieve the above object, the present invention adopts the following technical solution: it comprises a slewing mechanism and a lifting mechanism; the slewing mechanism comprises: A base, wherein the interior of the base is a hollow structure, and a bearing seat is embedded in the top opening of the base; A rotary gear, wherein the rotary gear is mounted on the rotary main shaft and is disposed in the base, wherein the lower end of the rotary main shaft is rotatably mounted on the bottom of the base by means of a tapered bearing, and the rotary main shaft is rotatably connected to the bearing seat by means of the tapered bearing; A rotary rack, the rotary rack is meshed with the rotary gear for driving, and the rotary rack is movably arranged in the oil cylinder barrel, and both ends of the oil cylinder barrel are installed with end covers with oil passage holes after passing through the base; A rotating table, wherein the rotating table is sleeve-mounted on the rotating main shaft by using a main shaft mounting seat on the bottom plate; The lifting mechanism comprises: A boom, one end of which is hinged to a lifting shaft on a rotating platform, and the other end is provided with a pulley seat, in which a pulley is provided; a hydraulic reducer is provided on the outer side of one end of the boom close to the hinged end of the rotating platform, and the output end of the hydraulic reducer passes through the rear side wall of the boom and is connected to the barrel shaft of the wire rope drum; A steel wire rope, one end of which is wound around a steel wire rope drum, and the other end of which passes through a pulley and is suspended below the pulley; A luffing cylinder, one end of which is hinged to the boom, and the other end of which is hinged to the rotating table.

[0005] Furthermore, a copper sleeve is provided on the outer side of the rotary rack, and the copper sleeve is installed on the side wall of the base by using a copper sleeve seat.

[0006] Furthermore, a half gear ring is installed on the bearing seat, the half gear ring is meshed with the gear, and the gear is connected to a rotary encoder fixed on the rotating platform.

[0007] Furthermore, the top of the rotating main shaft is connected to the main shaft mounting seat by means of a pressing plate.

[0008] Furthermore, a variable amplitude encoder is connected to the front end of the lifting shaft.

[0009] Furthermore, a lifting encoder is connected to the front end of the shaft of the wire rope drum.

[0010] Furthermore, a roller is connected to the right side of the bottom plate of the rotating table by a rotating shaft, and the roller is movably and rollingly arranged with the outer wall of the bearing seat.

[0011] Furthermore, a force measuring pin is installed on the pulley seat, and the wire rope is against the bottom wall of the force measuring pin.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a dredging crane under the dock, which utilizes a variable-length oil cylinder in conjunction with a hydraulic rack oil cylinder (slewing rack, oil cylinder barrel, slewing gear, etc.) to achieve the lifting and rotation of the boom and realize the adjustment of various working states. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention.

[0014] Figure 2 yes Figure 1 Top view of the .

[0015] Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0016] Figure 4 It is a schematic diagram of the internal structure of the base in the present invention.

[0017] Figure 5 yes Figure 4 Middle BB section view.

[0018] Figure 6 It is a structural schematic diagram of the rotary rack in the present invention.

[0019] Figure 7 It is a structural schematic diagram of the half gear ring in the present invention.

[0020] Figure 8 It is a structural schematic diagram of the rotating table in the present invention.

[0021] Fig. 9 yes Figure 8 CC section view.

[0022] Fig.10 It is a top view of the rotating table in the present invention.

[0023] Fig.11 It is a structural schematic diagram of the arm support in the present invention.

[0024] Fig.12It is a cross-sectional view of the boom in the present invention.

[0025] Description of reference numerals: Base 1, rotating table 2, arm 3, articulated seat three 3-1, articulated seat two 3-2, wire rope 4, pulley 5, variable amplitude cylinder 6, cylinder barrel 7, rotary encoder 8, variable amplitude encoder 9, lifting encoder 10, pulley seat 11, wire rope drum 12, hydraulic reducer 13, force measuring pin 14, end cover 15, rotary rack 16, copper sleeve 17, copper sleeve seat 18, tapered bearing 19, rotary gear 20, bearing seat 21, rotary main shaft 22, pressure plate 23, half gear ring 24, lifting shaft 25, gear 26, main shaft mounting seat 27, articulated seat one 28, roller 29. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. The preferred embodiments in the description are only used as examples, and all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present invention.

[0027] like Figure 1-Figure 12 As shown, this specific embodiment adopts the following technical solution: it includes a slewing mechanism and a lifting mechanism, both of which are equipped with a balancing valve. Once the power or pressure is lost for some reason, all operating actions will stop automatically, and there is a low pressure and low oil level alarm parking structure (neither the balancing valve nor the alarm parking structure is a mature technology, and is not shown in the figure); the slewing mechanism includes: A base 1, wherein the base 1 is hollow inside and a bearing seat 21 is embedded in the top opening; A rotary gear 20, wherein the rotary gear 20 is mounted on a rotary main shaft 22 and is disposed in the base 1, wherein the lower end of the rotary main shaft 22 is rotatably mounted on the bottom of the base 1 by means of a tapered bearing 19, and the rotary main shaft 22 is rotatably connected to a bearing seat 21 by means of the tapered bearing 19; A rotary rack 16, wherein the rotary rack 16 is meshed and driven with a rotary gear 20, and the rotary rack 16 is movably arranged in the oil cylinder 7. After the two ends of the oil cylinder 7 pass through the base 1, end covers 15 with oil passage holes are installed. The oil cylinder 7, the return rack 16, the rotary gear 20 and the end cover 15 constitute a hydraulic rack oil cylinder, and the oil passage is connected to the oil cylinder 7 by the end cover 15; a copper sleeve 17 is arranged on the outer side of the rotary rack 16, and the copper sleeve 17 is installed on the side wall of the base 1 by a copper sleeve seat 18; The rotating table 2 is installed on the rotating main shaft 22 by means of the main shaft mounting seat 27 on the bottom plate thereof, and is fixedly connected by means of the pressure cover 23 and the bolt assembly; a hinge seat 28 is integrally formed on the right side of the rotating table 2; a roller 29 is connected to the right side of the bottom plate of the rotating table 2 by means of a rotating shaft, and the roller 29 is movably rolled with the outer wall of the bearing seat 21, so as to stabilize the rotating table 2 during the rotation process; A half gear ring 24, wherein the half gear ring 24 is mounted on the bearing seat 21, the half gear ring 24 is meshed with a gear 26, the gear 26 is connected to a rotary encoder 8 fixed on the rotating table 2, the rotary encoder 8 and the hydraulic rack cylinder are remotely connected to a PLC control system via a line, and the PLC control system is connected to a ship control system; The lifting mechanism comprises: Boom 3, one end of the boom 3 is integrally formed with an articulated seat three 3-1, the articulated seat three 3-1 is articulated on the lifting shaft 25 on the rotating table 2, the front end of the lifting shaft 25 is connected with a variable amplitude encoder 9, the bottom wall of the boom 3 is fixed with an articulated seat two 3-2, the other end of the boom 3 is installed with a pulley seat 11, and the pulley seat 11 is installed with a pulley 5; a force measuring pin 14 is installed on the pulley seat 11, and the wire rope 4 is against the bottom wall of the force measuring pin 14; a hydraulic reducer 13 is installed on the outer side of one end of the boom 3 close to the articulated seat three 3-1, the output end of the hydraulic reducer 13 passes through the rear side wall of the boom 3, and is connected to the barrel shaft of the wire rope drum 12, the front end of the barrel shaft of the wire rope drum 12 is connected with a lifting encoder 10, the lifting encoder 10 and the hydraulic reducer 13 are remotely connected to the PLC control system by lines, and the PLC control system is connected to the ship control system; A steel wire rope 4, one end of which is wound around a steel wire rope drum 12, and the other end of which passes through a pulley 5 and is suspended below the pulley 5; The luffing cylinder 6, the left end of the luffing cylinder 6 is hinged to the hinge seat 1 28, and the right end of the luffing cylinder 6 is hinged to the hinge seat 2 3-2; the luffing encoder 9 and the luffing cylinder 6 are remotely connected to the PLC control system by lines, and the PLC control system is connected to the ship control system; Control cables are laid in the oil circuit of the luffing cylinder 6, the oil circuit of the hydraulic reducer 13, and the hydraulic oil circuit connected to the end cover 15 to avoid cable corrosion; The rotating main shaft 22, the lifting shaft 25, the shaft of the wire rope drum 12 and the axle of the pulley 5 are all made of 316L stainless steel to avoid corrosion problems caused by long-term immersion in seawater.

[0028] When using the present invention, the crane of the present invention is installed on the deck of the intelligent dredging ship so that the height of the whole machine is not more than 900mm from the deck surface, and the oil circuits and circuits are connected. The hydraulic rack cylinder works to drive the slewing gear 20 to rotate, thereby driving the slewing main shaft 22 to rotate, and then driving the rotating table 2 to rotate together with the boom 3 to achieve position adjustment on the plane. While rotating, the rotary encoder 8 on the rotating table 2 uses the gear 26 at its bottom to mesh with the half gear ring 24 to rotate, so as to achieve real-time monitoring of the rotation angle, and then feedback to the PLC control system; the boom 3 is driven to rotate around the lifting shaft 25 by the variable amplitude cylinder 6 to achieve longitudinal position adjustment. While lifting and rotating, the variable amplitude encoder 9 monitors the lifting angle in real time, and then feeds back to the PLC control system; finally, the hydraulic reducer 13 is used to drive the wire rope drum 12 to rotate, so as to control the retraction and release of the wire rope 4 to achieve dredging operations. While the wire rope drum 12 rotates, the lifting encoder 10 monitors the number of rotations of the wire rope drum 2 in real time, and then feeds back to the PLC control system.

[0029] Compared with the prior art, the present invention has the following beneficial effects: 1. The main components of the present invention are made of high-strength marine steel plates, and the oil pipe is made of seamless 316 stainless steel pipe, the hose rupture coefficient is 4, and the entire surface of the steel plate is sandblasted, which effectively increases the corrosion resistance and firmness of the overall structure; 2. The present invention adopts a hydraulic system and is equipped with a balance valve and a low pressure / low oil level alarm parking structure. Once the power or pressure is lost for some reason, all operating actions will stop automatically, greatly improving the safety of the operation; 3. The slewing mechanism is used in conjunction with the lifting mechanism to meet the needs of multi-angle working surfaces and has a wide range of applications; 4. Two layers of steel wire can be wound on the steel wire drum to prevent the risk of operation failure caused by the breakage of one steel wire rope; 5. The overall structure of the present invention is relatively small, and it can be installed on the deck of a dredging vessel. It can be periodically immersed in seawater 3 meters below the surface and work normally. It can also work normally after emerging from the water, and has a wide range of applications.

[0030] For those skilled in the art, they can modify the technical solutions described in the aforementioned embodiments and make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dredging crane under a dock, characterized by: It comprises a slewing mechanism and a lifting mechanism; the slewing mechanism comprises: A base (1), the interior of the base (1) being a hollow structure, with a bearing seat (21) embedded in the top opening; A rotary gear (20), the rotary gear (20) being mounted on a rotary main shaft (22) and disposed in the base (1); the lower end of the rotary main shaft (22) being rotatably mounted on the bottom of the base (1) by means of a tapered bearing (19); and the rotary main shaft (22) being rotatably connected to a bearing seat (21) by means of the tapered bearing (19); A rotary rack (16), wherein the rotary rack (16) is meshed with the rotary gear (20) for driving, and the rotary rack (16) is movably arranged in the oil cylinder (7), and both ends of the oil cylinder (7) are installed with end covers (15) with oil passage holes after passing through the base (1); A rotating table (2), wherein the rotating table (2) is sleeve-mounted on a rotating main shaft (22) by means of a main shaft mounting seat (27) on a bottom plate of the rotating table (2); The lifting mechanism comprises: A boom (3), one end of the boom (3) is hinged on a lifting shaft (25) on a rotating platform (2), and the other end is provided with a pulley seat (11), in which a pulley (5) is provided; a hydraulic reducer (13) is provided on the outer side of one end of the boom (3) close to the hinged end of the rotating platform (2), and the output end of the hydraulic reducer (13) passes through the rear side wall of the boom (3) and is connected to the barrel shaft of the wire rope drum (12); A steel wire rope (4), one end of the steel wire rope (4) being wound around a steel wire rope drum (12), and the other end of the steel wire rope (4) passing through a pulley (5) and being suspended below the pulley (5); A luffing oil cylinder (6), one end of which is hinged to the boom (3), and the other end of which is hinged to the rotating platform (2).

2. The dredging crane under the dock according to claim 1, characterized in that: A copper sleeve (17) is provided on the outer side of the rotary rack (16), and the copper sleeve (17) is mounted on the side wall of the base (1) using a copper sleeve seat (18).

3. The dredging crane under the dock according to claim 2, characterized in that: A half gear ring (24) is mounted on the bearing seat (21), the half gear ring (24) is meshed with a gear (26), and the gear (26) is connected to a rotary encoder (8) fixed on the rotating platform (2).

4. The dredging crane under the dock according to claim 3, characterized in that: The top of the rotary main shaft (22) is connected to the main shaft mounting seat (27) by means of a pressing plate (23).

5. The crane for desilting below a dock according to claim 4, characterized in that: The front end of the lifting shaft (25) is connected to an amplitude encoder (9).

6. The dredging crane under the dock according to claim 5, characterized in that: A lifting encoder (10) is connected to the front end of the drum shaft of the wire rope drum (12).

7. The dredging crane under the dock according to claim 6, characterized in that: The right side of the bottom plate of the rotating platform (2) is connected to a roller (29) via a rotating shaft, and the roller (29) is movably and rollably arranged with the outer wall of the bearing seat (21).

8. The crane for desilting below a dock according to claim 7, characterized in that: A force measuring pin shaft (14) is mounted on the pulley seat (11), and the steel wire rope (4) is disposed against the bottom wall of the force measuring pin shaft (14).

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