CN111232853A - Large hydraulic underwater grab bucket device - Google Patents

Large hydraulic underwater grab bucket device Download PDF

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Publication number
CN111232853A
CN111232853A CN202010147691.3A CN202010147691A CN111232853A CN 111232853 A CN111232853 A CN 111232853A CN 202010147691 A CN202010147691 A CN 202010147691A CN 111232853 A CN111232853 A CN 111232853A
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CN
China
Prior art keywords
hydraulic
grab bucket
grab
suspension arm
cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010147691.3A
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Chinese (zh)
Inventor
李文华
姚钧译
唐昌荣
韩凤翚
林珊颖
陈休宇
刘文博
原津豪
李�根
叶浩然
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Dalian Maritime University
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Dalian Maritime University
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Filing date
Publication date
Application filed by Dalian Maritime University filed Critical Dalian Maritime University
Priority to CN202010147691.3A priority Critical patent/CN111232853A/en
Publication of CN111232853A publication Critical patent/CN111232853A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/06—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs mounted for jibbing or luffing movements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/16—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs supported by columns, e.g. towers having their lower end mounted for slewing movements
    • B66C23/166—Simple cranes with jibs which may be fixed or can slew or luff
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
    • B66C23/52—Floating cranes
    • B66C23/53—Floating cranes including counterweight or means to compensate for list, trim, or skew of the vessel or platform
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/82—Luffing gear
    • B66C23/821—Bracing equipment for booms
    • B66C23/826—Bracing equipment acting at an inclined angle to vertical and horizontal directions
    • B66C23/828—Bracing equipment acting at an inclined angle to vertical and horizontal directions where the angle is adjustable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/84—Slewing gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C3/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith and intended primarily for transmitting lifting forces to loose materials; Grabs
    • B66C3/02—Bucket grabs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C3/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith and intended primarily for transmitting lifting forces to loose materials; Grabs
    • B66C3/14—Grabs opened or closed by driving motors thereon
    • B66C3/16—Grabs opened or closed by driving motors thereon by fluid motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/024—Installations or systems with accumulators used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/08—Servomotor systems incorporating electrically operated control means
    • F15B21/087—Control strategy, e.g. with block diagram

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Load-Engaging Elements For Cranes (AREA)

Abstract

The invention provides a large-scale hydraulic underwater grab bucket device which comprises a steering system, a lifting system, a base and a hydraulic grab bucket system, wherein the steering system is connected with the lifting system; the steering system includes a rotating gear; the lifting system comprises a winch, a suspension arm, a first hydraulic oil cylinder and a pulley block; the hydraulic grab system comprises a grab body and a second hydraulic cylinder, wherein the second hydraulic cylinder is symmetrically arranged above two half grab buckets of the grab body respectively, so that the grab body can be opened and closed along with the extension of the second hydraulic cylinder. The large-scale hydraulic underwater grab bucket device is simple in structure, convenient to operate, cost-saving, capable of stably and efficiently completing the fishing work of submarine objects and remarkably improving the fishing efficiency of submarine substances, particularly suitable for being popularized and applied in the field of devices for fishing and recovering underwater equipment of ships, and capable of solving the problems that the existing fishing device configured for ships cannot meet the requirements on strength and stability and the like.

Description

Large hydraulic underwater grab bucket device
Technical Field
The invention relates to a grab bucket device applied to underwater sunken ship and salvage of sunk objects, in particular to a large hydraulic underwater grab bucket device.
Background
At present, modes of crushing salvaged objects by underwater blasting, utilizing a buoy to perform overall salvage and the like are mostly adopted at home and abroad, and most of domestic researches on underwater salvage grab buckets are small-tonnage grab buckets or destructive salvage grab buckets, so that the value of the salvaged objects is greatly damaged, the salvage needs to be performed for many times, and the efficiency is lower. The large-tonnage grab bucket for underwater salvage is researched, underwater sediments are integrally salvaged out, the salvage effect is good, the grab bucket is suitable for deep-water large-tonnage salvage, and the salvage efficiency is greatly improved. At present, a large-scale salvaging grab bucket with strong load capacity is needed to salvage a large-scale underwater target.
Disclosure of Invention
According to the problem that the existing salvaging grab bucket is low in efficiency and damages sunk objects, the large-scale hydraulic underwater grab bucket device is provided.
The technical means adopted by the invention are as follows:
a large hydraulic underwater grab device, the device comprising: the hydraulic grab bucket system comprises a steering system for controlling the extending direction of the grab bucket, a lifting system for controlling the settling length of the grab bucket, a base and a hydraulic grab bucket system; the steering system comprises a rotating gear arranged in a cabin below a deck, and the rotating gear is driven by a power device to drive the base system to do rotary motion; the lifting system comprises a winch, a suspension arm, a first hydraulic oil cylinder and a pulley block, wherein the winch is arranged at one end of the base, which is hinged with the suspension arm, a steel cable released by the winch extends along the suspension arm and bypasses the tail end of the suspension arm to be connected with the hydraulic grab system through the pulley block, one end of the first hydraulic oil cylinder is connected with the middle part of the base, and the other end of the first hydraulic oil cylinder is connected with the middle part of the suspension arm, so that the suspension arm is lifted by a; the hydraulic grab system comprises a grab main body and a second hydraulic cylinder, wherein the second hydraulic cylinder is symmetrically arranged above two half grab buckets of the grab main body respectively, so that the grab main body is folded along with the extension of a push rod of the second hydraulic cylinder.
Further, the pulley block comprises a fixed pulley arranged at the top end of the suspension arm and a movable pulley arranged on the grab bucket main body.
Furthermore, the upper part of the base is provided with a threaded round hole matched with the winch screw, so that the winch is fixed on the base.
Furthermore, the upper part of the base is provided with a smooth round hole in hinged fit with the suspension arm and a smooth round hole in hinged fit with a first hydraulic oil cylinder cover.
Furthermore, the bottom end of the suspension arm is provided with a smooth round hole in hinged fit with the base system, and the middle part of the suspension arm is provided with a smooth round hole in hinged fit with the top end of the piston rod of the first hydraulic oil cylinder.
Furthermore, the middle part of the grab bucket main body is provided with a smooth round hole in hinged fit with the cylinder cover of the second hydraulic cylinder, and the upper part of the grab bucket main body is provided with a smooth round hole in hinged fit with the piston rod of the second hydraulic cylinder.
Further, the first hydraulic oil cylinder is a large hydraulic oil cylinder; the second hydraulic oil cylinder is a medium-sized hydraulic oil cylinder.
Compared with the prior art, the invention has the following advantages:
1. the controllable rotation design of the base effectively counteracts the shaking of the ship body in the process of retracting and releasing the grab bucket and grabbing underwater sediments.
2. According to the invention, the lifting of the suspension arm is controlled by arranging the large-scale hydraulic system, so that the height between the grab bucket and the water surface in the retracting process can be adjusted, and the cable can be retracted after the grab bucket is discharged, and can be retracted under worse sea conditions.
3. The device has high working efficiency, controls the suspension arm by using a large hydraulic system, lifts the grab bucket by using the movable pulley above the grab bucket system, does not need manual swing stopping when the grab bucket system discharges water, and has good safety and reliability.
4. The invention adopts the medium-sized hydraulic system to control the opening and closing of the grab bucket, so that the opening angle of the grab bucket is controllable and lockable, the salvaged underwater sediments are easy to protect, the falling probability of the grabbed sediments is reduced, the threat of the grabbed sediments to the equipment and personnel safety is reduced, the economic loss is reduced, and the safety of the offshore salvage operation is ensured.
5. The grab bucket device is simple in structure, easy to operate and easy to modify a traditional grab bucket device.
Based on the reason, the underwater submerged object salvage device is suitable for being popularized in the field of underwater submerged object salvage devices.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a front view of a large hydraulic underwater grab bucket apparatus of the present invention.
Fig. 2 is a right side view of the large hydraulic underwater grab bucket apparatus of the present invention.
Fig. 3 is a top view of the large hydraulic underwater grab bucket apparatus of the present invention.
FIG. 4 is a working schematic diagram of a hydraulic system of a large hydraulic oil cylinder.
Fig. 5a is a front view of the grapple system and the movable sheave of the present invention.
Fig. 5b is a right side view of the grapple system and the movable sheave of the present invention.
Fig. 5c is a top view of the grapple system and the traveling block of the present invention.
Wherein: 1. a base; 2. a rotating gear; 3. a control room; 4. a winch; 5. a suspension arm; 6. a first hydraulic cylinder; 7. a fixed pulley; 8. a movable pulley; 9. a wire rope; 10. a second hydraulic cylinder; 11. a grab bucket body; 601. an oil drain valve; 602. an oil suction filter; 603. an accumulator; 604. an electric motor; 605. A hydraulic pump; 606. a one-way valve; 607. a pressure sensor; 608. an electromagnetic directional valve; 609. a hydraulic control check valve; 610. an overflow valve; 611. an oil tank; 612. an oil replenishing valve; 613. a throttle valve; 614. A cylinder barrel.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
As shown in fig. 1 to 5, the invention provides a large hydraulic underwater grab bucket device, which comprises a base system, a lifting system, a steering system and a hydraulic grab bucket system. Wherein the steering system is arranged inside the base system. In addition, the base system also comprises a base 1 and a control chamber 3, and a control system arranged in the control chamber is mainly used for controlling and driving an alternating current motor through a relay and a slide rheostat, so that the rotation of the base 1 of the device, the rise and fall of the suspension arm 5 through the control of the first hydraulic oil cylinder 6, the opening and closing of the grab bucket body 11 through the control of the second hydraulic oil cylinder 10 and the retraction and release of the steel cable 9 are controlled. The steering system comprises a rotating gear 2 arranged in a cabin below the deck, and the rotating gear 2 is driven by a power device to drive the base system to do rotary motion. The lifting system comprises a winch 4, a suspension arm 5, a first hydraulic oil cylinder 6 and a pulley block, wherein the winch 4 is arranged at one end of the base 1, which is hinged with the suspension arm 5, and a steel cable 9 released by the winch extends along the suspension arm 5 and bypasses the tail end of the suspension arm 5 to be connected with the hydraulic grab system through the pulley block. One end of the first hydraulic oil cylinder 6 is connected with the middle part of the base 1, and the other end of the first hydraulic oil cylinder is connected with the middle part of the suspension arm 5, so that the suspension arm 5 is lifted by a corresponding height along with the extension of a push rod of the first hydraulic oil cylinder 6. The hydraulic grab system comprises a grab main body and a second hydraulic cylinder 10, wherein the second hydraulic cylinder 10 is symmetrically arranged above two half grab buckets of the grab main body respectively, so that the grab main body is opened along with the extension of a push rod of the second hydraulic cylinder 10. The pulley block comprises a fixed pulley 7 arranged at the tail end of the suspension arm and used for steering and a movable pulley 8 arranged on the grab bucket main body.
The first hydraulic oil cylinder 6 is a large hydraulic oil cylinder; the second hydraulic cylinder 10 is a medium hydraulic cylinder. The large hydraulic cylinder and the medium hydraulic cylinder both follow the working principle of a hydraulic system, and taking the large hydraulic cylinder as an example, the hydraulic system of the large hydraulic cylinder is specifically shown in fig. 4, and comprises an oil drain valve 601, an oil suction filter 602, an accumulator 603, an electric motor 604, a hydraulic pump 605, a check valve 606, a pressure sensor 607, an electromagnetic directional valve 608, a hydraulic control check valve 609, an overflow valve 610, an oil tank 611, an oil replenishing valve 612, a throttle valve 613 and a cylinder 614. The oil drain valve 601 is used for draining the excess hydraulic oil in the oil tank. The suction oil filter 602 is used to filter the hydraulic oil entering the hydraulic line from the oil compartment 611. When the load is moving at a low speed, the flow rate required by the load is smaller than the flow rate of the hydraulic pump, the redundant flow rate of the hydraulic pump is stored in the accumulator 603, and when the flow rate required by the load is larger than the flow rate of the hydraulic pump, the liquid is discharged from the accumulator 603 to compensate the shortage of the flow rate of the hydraulic pump. When shut down but still maintaining a certain pressure, the hydraulic pump can be stopped and the accumulator 603 can compensate for system leakage to maintain the system pressure. The motor 604 provides power for the hydraulic fluid entering the hydraulic circuit from the oil compartment 611. The hydraulic pump 605 pumps hydraulic oil from the oil compartment 611 into the hydraulic line; check valve 606 prevents hydraulic oil from flowing back into tank 611; the pressure sensor 607 is used for detecting the pressure of the cylinder 614; the solenoid directional valve 608 controls the direction of the hydraulic oil flow in the hydraulic line.
The pilot operated check valve 609 is mainly used for maintaining pressure, supporting a hydraulic cylinder and realizing locking of the hydraulic cylinder. Specifically, the method comprises the following steps: (1) the pressure is maintained. The slide valve type reversing valve has the phenomenon of clearance leakage and can only maintain pressure for a short time. When the pressure maintaining requirement exists, a hydraulic control one-way valve can be added on the oil circuit, and the oil circuit is maintained for a long time by utilizing the closing tightness of the cone valve. (2) The "support" of the hydraulic cylinder. In a vertical cylinder, the piston and piston rod may be caused to slide down under the weight of the piston and piston rod due to leakage of the slide valve and tube. The hydraulic control one-way valve is connected with an oil way of the lower cavity of the hydraulic cylinder, so that the movable parts such as the piston, the sliding block and the like of the hydraulic cylinder can be prevented from sliding downwards. (3) And locking of the hydraulic cylinder is realized. When the reversing valve is in the middle position, the two hydraulic control one-way valves are closed, oil in two cavities of the hydraulic cylinder can be tightly sealed, and at the moment, the piston cannot move under the action of external force.
When the system works normally, the valve is closed. Only when the load exceeds a prescribed limit (the system pressure exceeds the set pressure), the relief valve 610 opens and overload protection is performed so that the system pressure does not rise any more.
The oil tank 611 is used to store main hydraulic oil. The oil replenishment valve 612 is used to replenish the oil chamber with hydraulic oil when the oil chamber is not sufficiently pressurized with hydraulic oil. The throttle valve 613 is used to adjust the volume of hydraulic oil of the two cylinders and thus adjust the pressure of the hydraulic rod. The cylinder 614 is used to store a small amount of hydraulic oil to push the hydraulic rod.
When the piston rod advances, the flow direction of the hydraulic oil is the oil chamber 611 → the oil suction filter 602 → the hydraulic pump 605 → the check valve 606 → the electromagnetic directional valve 608 → the pilot operated check valve 609 → the cylinder 614.
When the piston rod retreats, the hydraulic oil flows in the direction of the cylinder 614 → the pilot check valve 609 → the electromagnetic directional valve → 608 → the oil chamber 611.
Furthermore, the suspension arm 5 and the large hydraulic oil cylinder 6 are arranged on the upper portion of the base 1, the suspension arm 5 and the large hydraulic oil cylinder 6 are hinged to each other, and the winch 4 is fixed on the base 1. Further, the upper part of the base 1 is provided with a threaded round hole matched with the winch 4 through a screw, so that the winch 4 is fixed on the base 1. The upper part of the base 1 is provided with a smooth round hole which is in hinged fit with the suspension arm 5 and the first hydraulic oil cylinder 6. The upper part of the suspension arm 5 is provided with a smooth round hole in hinged fit with the first hydraulic oil cylinder 6, and the middle part of the suspension arm 5 is provided with a smooth round hole in hinged fit with a piston rod of the first hydraulic oil cylinder 6.
Further, the power device of the steering system is an alternating current motor. The large-scale rotating gear of the steering system is driven to rotate by the alternating current motor, so that the base 1 and the suspension arm 5 are driven to swing to the outboard from the inboard or retract to the inboard from the outboard, the swinging speed of the base and the suspension arm is controlled, and the angle between the suspension arm 5 and the shafting center line of the mother ship is finely adjusted by a steering wheel of a control room, so that the suspension arm 5 can stay at different positions. The suspension arm 5 is utilized to support the grab bucket system and can offset the shaking of the ship body in the processes of retraction, collection and salvage, so that the releasing, salvaging and recovering processes are more stable, and enough space is reserved for normal releasing and recovering. A grab bucket system is retracted and released by arranging a winch 4; the multi-way valve of the control chamber 3 controls the second hydraulic cylinder 10 to control the opening and closing of the grab bucket main body 11 so as to grab articles, the second hydraulic cylinder 10 enables the grabbing effect to be more reliable, the retracting and releasing process to be more stable, and the device is high in operation efficiency and good in safety and reliability.
Still further, the lifting system comprises a winch 4, a boom 5, a large hydraulic cylinder 6, a fixed pulley 7 fixed on the boom and a steel cable 9. The middle part of the suspension arm 5 is pushed by a piston rod of a large hydraulic oil cylinder 6 to lift the suspension arm 5, then the angle between the suspension arm 5 and the deck plane of the mother ship is adjusted, the rotation direction and the rotation angle of the suspension arm 5 are controlled by a steering system in a control room, the suspension arm can be stopped at any position in the middle, and the suspension arm has enough holding capacity. The steel cable 9 is led out from the winch, fixedly wound on the top end of the suspension arm 5 by bypassing the fixed pulley 7 at the top end of the suspension arm and the movable pulley 8 above the grab bucket system, and controls the lifting of the grab bucket system. The main functions of the lifting system are to swing the grab bucket system from the inboard of the mother ship to the outboard (or from the outboard to the inboard), release and recover the grab bucket system in the process of folding and unfolding, and also serve as a main bearing component for folding and unfolding loads.
Further, the grapple system is composed of a medium hydraulic cylinder 10 and a grapple body 11. The middle-sized hydraulic oil cylinder 10 is hinged with the grab bucket main body 11 through a smooth round hole in the side surface of the grab bucket main body 11, and controls the opening and closing of the grab bucket main body 11 so as to grab and release articles; the movable pulley 8 is hinged with the grab through a smooth round hole above the grab system, and the lifting of the grab system is controlled through a steel cable 9 passing through the lower part of the movable pulley 8.
The large-scale hydraulic underwater grab bucket device is simple in structure, convenient to operate, cost-saving, capable of stably and efficiently completing the fishing work of submarine objects and remarkably improving the fishing efficiency of submarine substances, particularly suitable for being popularized and applied in the field of devices for fishing and recovering underwater equipment of ships, and capable of solving the problems that the existing fishing device configured for ships cannot meet the requirements on strength and stability and the like.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (7)

1. A large hydraulic underwater grab bucket apparatus, the apparatus comprising: the hydraulic grab bucket system comprises a steering system for controlling the extending direction of the grab bucket, a lifting system for controlling the settling length of the grab bucket, a base and a hydraulic grab bucket system; wherein,
the steering system comprises a giant rotary gear, a driving motor, a relay and a sliding rheostat, wherein the giant rotary gear is arranged in a cabin below a deck, the relay is used for controlling the driving motor, and the giant rotary gear is driven by the driving motor and drives the base system to rotate;
the lifting system comprises a winch, a suspension arm, a first hydraulic oil cylinder and a pulley block, wherein the winch is arranged at one end of the base, which is hinged with the suspension arm, a steel cable released by the winch extends along the suspension arm and bypasses the tail end of the suspension arm to be connected with the hydraulic grab system through the pulley block, one end of the first hydraulic oil cylinder is connected with the middle part of the base, and the other end of the first hydraulic oil cylinder is connected with the middle part of the suspension arm, so that the suspension arm is lifted by a;
the hydraulic grab system comprises a grab body and a second hydraulic cylinder, wherein the second hydraulic cylinder is symmetrically arranged above two half grab buckets of the grab body respectively, so that the grab body is folded along with the extension of a push rod of the second hydraulic cylinder.
2. The large hydraulic underwater grab bucket apparatus of claim 1, wherein the pulley block comprises a fixed pulley provided at the tip of the boom and a movable pulley provided on the grab bucket body.
3. The large hydraulic underwater grab bucket device of claim 1, wherein the upper part of the base is provided with a threaded circular hole matched with the winch screw to fix the winch on the base.
4. The large hydraulic underwater grab bucket device of claim 1, wherein the upper portion of the base is provided with a smooth circular hole in hinged fit with the boom and the first hydraulic cylinder.
5. The large hydraulic underwater grab bucket device according to claim 1, wherein a smooth circular hole in hinged fit with the first hydraulic oil cylinder is arranged at the upper part of the suspension arm, and a smooth circular hole in hinged fit with a piston rod of the first hydraulic oil cylinder is arranged at the middle part of the suspension arm.
6. The large hydraulic underwater grab bucket device according to claim 1, wherein the grab bucket body is provided with a smooth round hole in the middle part in hinged fit with the second hydraulic cylinder, and is provided with a smooth round hole in the upper part in hinged fit with the piston rod of the second hydraulic cylinder.
7. A large hydraulic underwater grab bucket arrangement according to any of claims 1 to 6 in which the first hydraulic ram is a large hydraulic ram; the second hydraulic oil cylinder is a medium-sized hydraulic oil cylinder.
CN202010147691.3A 2020-03-05 2020-03-05 Large hydraulic underwater grab bucket device Pending CN111232853A (en)

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