CN115750475A

CN115750475A - Electric pushing system and device for roll-on-roll-off ship

Info

Publication number: CN115750475A
Application number: CN202211461360.2A
Authority: CN
Inventors: 周智; 李海龙; 王建峰; 黄岳
Original assignee: Cssc Huahai Marine Equipment Co ltd
Current assignee: Cssc Huahai Marine Equipment Co ltd
Priority date: 2022-11-17
Filing date: 2022-11-17
Publication date: 2023-03-07
Anticipated expiration: 2042-11-17
Also published as: CN115750475B

Abstract

The application discloses electronic top of roll-on-roll-off ship pushes away system and device, the hydro-cylinder comprises a cylinder, the valve unit, the oil tank, motor pump package, divide into by the piston in the hydro-cylinder has the pole chamber and does not have the pole chamber, motor pump package and oil tank intercommunication just can be through the action of valve unit control cylinder, adopt foretell electronic top of roll-on-roll-off ship push away system and device, with the hydro-cylinder, the valve unit, the oil tank, motor pump package is integrated together in order to form closed system, occupation space is little, can satisfy the equipment fixing requirement better, not only can realize the initiative top of hydro-cylinder through the valve unit simultaneously, passive buffering is withdrawed, and can realize the initiative of hydro-cylinder and withdraw in springboard operating position switching process, prevent springboard and thrustor collision, suitability and fail safe nature are higher.

Description

Electric pushing system and device for roll-on-roll-off ship

Technical Field

The invention relates to the technical field of hydraulic push rod structures, in particular to an electric pushing system and device for a roll-on-roll-off ship.

Background

In general, a ro-ro vessel is provided with gangboards hinged to a hull at stern and side openings, and serves as a passage for cargo such as vehicles to enter and exit the hull. Because influences such as boats and ships heeling, trim, strong wind, freezing can lead to the springboard can't normally descend, consequently need put the springboard with the help of thrustor in the opening stage is supplementary, when the springboard was closed, played the cushioning effect simultaneously, reduced the structural impact of springboard to the hull.

Traditional roll-on-roll-off ship thrustor mostly adopts the open system of concentrated hydraulic pressure oil supply fuel feeding, this mode equipment layout dispersion, occupation space is big, need the shipyard to use the pipeline to link together above-mentioned equipment, and the pipeline that carries out throw oil work such as washing and pressure test, the site work volume is big, and because the pipeline throws oil abluent not in place and leads to equipment trouble frequently, hydraulic line is long simultaneously, connect many, the equipment oil leak risk that leads to is high, the risk to environmental pollution has been increased, the equipment later maintenance is loaded down with trivial details.

Due to the carbon emission requirement of the shipping industry, large roll-on ships frequently adopt LNG and other double fuels, and the corresponding roll-on equipment is required to be driven by electric power, so that the original hydraulic control mode of centralized hydraulic oil source oil supply is cancelled, and the thrustor is directly driven by the electric power to act. Because the space of equipment on the ship is limited, the design of the pushing device needs to be as compact, small and light as possible, and the pushing device is convenient for personnel to maintain. Meanwhile, the hydraulic oil cylinder adopted by the original pushing scheme is only provided with one hydraulic oil port and is used for actively feeding oil for pushing when the gangway descends, the passive oil return is buffered for withdrawing when the gangway is closed, the passive withdrawing mode completely depends on the gangway to push back the piston of the pushing oil cylinder, and the pushing device cannot be actively withdrawn, the large-scale roll-on-roll ship has a plurality of layers of decks, the side gangway can work at different deck working positions, and in the switching process of the gangway working positions, if the pushing device is still at a completely extending position, the danger of collision between the gangway and the pushing device can be generated.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the electric jacking system and device for the roll-on-roll-off ship, which have high integration degree and strong applicability and stability.

In order to achieve the above purpose, the invention is realized by the following technical scheme.

The application provides an electric pushing system for a roll-on-roll-off ship, which comprises an oil tank, an oil cylinder, a motor pump set and a control valve set, wherein a piston rod is arranged in the oil cylinder and is divided into a rod cavity and a rodless cavity by a piston;

the motor pump set comprises a bidirectional quantitative hydraulic pump, wherein the first end of the bidirectional quantitative hydraulic pump is connected with the rod cavity, and the second end of the bidirectional quantitative hydraulic pump is connected with the rodless cavity to form a closed loop;

the control valve group comprises a first hydraulic control one-way valve and a logic valve, wherein the inlet end of the first hydraulic control one-way valve is communicated with the second end of the bidirectional quantitative hydraulic pump, the outlet end of the first hydraulic control one-way valve is communicated with the rodless cavity, and a pilot port is communicated with pipelines between the first end of the bidirectional quantitative hydraulic pump and the rod cavity;

the oil inlet end of the logic valve is communicated with the first hydraulic control one-way valve and the pipeline between the rodless cavities, the oil discharge end and the pipeline between the oil outlet end and the oil tank, and the control end is communicated with the first hydraulic control one-way valve and the pipeline between the second ends of the bidirectional quantitative hydraulic pumps.

Further, the roll-on-roll-off ship electric jacking system is characterized in that the motor-pump set is integrated on the control valve set, and the roll-on-roll-off ship electric jacking system further comprises a driving motor for driving the bidirectional quantitative hydraulic pump;

the driving motor is connected with a junction box provided with an external power supply, the bidirectional quantitative hydraulic pump is soaked in the oil tank, and the driving motor and the gear pump are connected through a coupler.

Further defined, the roll-on-roll-off ship electric jacking system further comprises a pressure sensor connected to the junction box through a connector wiring harness and used for detecting oil pressure.

Further, the control valve group further comprises a first overflow valve, wherein a first end of the first overflow valve is communicated with the oil outlet end of the logic valve, and a second end of the first overflow valve is communicated with a pipeline between the oil outlet end of the logic valve and the oil tank.

Further, the control valve group further comprises an oil supplementing one-way valve, wherein the inlet end of the oil supplementing one-way valve is communicated with the second end of the first overflow valve and a pipeline between the oil tank, and the outlet end of the oil supplementing one-way valve is communicated with the first end of the bidirectional quantitative hydraulic pump and a pipeline between the rod cavities.

Further, the electric jacking system for the roll-on-roll-off ship is characterized in that the control valve set further comprises a second hydraulic control one-way valve, wherein the inlet end of the second hydraulic control one-way valve is communicated with the oil tank, and the outlet end of the second hydraulic control one-way valve is communicated with the first hydraulic control one-way valve and a pipeline between the rodless cavities;

and the pilot port of the second hydraulic control one-way valve is communicated with a pipeline between the first end of the bidirectional quantitative hydraulic pump and the rod cavity.

Further limiting, in the electric jacking system for the roll-on-roll-off ship, the control valve set further comprises a second overflow valve and a third overflow valve, wherein a first end of the second overflow valve is communicated with a pipeline between an outlet end of the second hydraulic control one-way valve and the rodless cavity, and a second end of the second overflow valve is communicated with a pipeline between an inlet end of the second hydraulic control one-way valve and the oil tank;

and the first end of the third overflow valve is communicated with the outlet end of the oil-supplementing one-way valve and a pipeline between the rod cavities, and the second end of the third overflow valve is communicated with the second end of the first overflow valve and a pipeline between the inlet ends of the oil-supplementing one-way valves.

Further, the electric jacking system for the roll-on-roll-off ship further comprises an air bag arranged in the oil tank and an inflation valve communicated with the air bag.

The application still provides an electronic thrustor of roll-on-roll-off ship adopts above-mentioned arbitrary electronic thrustor system of roll-on-roll-off ship, wherein, the terminal box is fixed to be set up on the valve unit and external cable, the hydraulic fluid port that has the pole chamber passes through the steel pipe and inserts the valve unit, the hydraulic fluid port process in no pole chamber the inside access of oil tank the valve unit.

Further, the roll-on-roll-off boat electric thruster is characterized in that a position sensor for monitoring the position of the piston is arranged on the oil cylinder at a position corresponding to the rod cavity and/or the rod cavity.

The invention has at least the following beneficial effects:

1. the oil cylinder, the control valve group, the oil tank and the motor pump group are integrated together to form a closed system, the occupied space is small, the equipment installation requirement can be better met, meanwhile, the active pushing and passive buffering withdrawing of the oil cylinder can be realized through the control valve group, the active withdrawing of the oil cylinder can be realized in the switching process of the working position of the springboard, the springboard is prevented from colliding with the pushing device, and the applicability and the safety and the reliability are higher;

2. a second overflow valve and a third overflow valve are respectively arranged on an extension loop and a retraction loop of a piston rod in the oil cylinder for pressure protection, so that overpressure damage of the pushing device during abnormal operation can be avoided;

3. an air bag is arranged in the oil tank, and the air bag can be pre-charged with a certain pressure through an inflation valve so as to avoid the situation of air suction when the bidirectional quantitative hydraulic pump operates;

4. the oil port of the rod cavity of the oil cylinder is connected into the control valve group through the steel pipe, and the oil port of the rodless cavity is connected into the control valve group through the oil tank in a built-in mode, so that the whole size of the device is optimized, and the risk of oil leakage is reduced;

5. mechanical, hydraulic and electrical integration are integrated, an external interface supplies power to the pushing system through only one cable, a hydraulic pipeline does not need to be additionally laid, oil leakage risks and fault points are reduced, equipment is convenient to maintain, and reliability is higher.

Drawings

FIG. 1 is a schematic view of an electric jacking system of a ro-ro vessel according to an embodiment of the present application;

fig. 2 is a schematic structural view of the electric thruster of the roll-on-roll-off ship in the embodiment of the application;

FIG. 3 is a schematic structural view of an electric thruster of the ro-ro vessel according to the embodiment of the present application;

FIG. 4 is a schematic structural view of an electric thruster of the ro-ro vessel according to the embodiment of the present application;

fig. 5 is a cross-sectional view of the "oil tank 100" portion of the electric thruster for ro-ro vessel in accordance with the embodiment of the present invention.

Reference numerals

The hydraulic control system comprises an oil tank-100, a driving motor-210, a coupler-220, a gear pump-230, a control valve group-300, a first overflow valve-310, a first hydraulic control one-way valve-320, a second hydraulic control one-way valve-330, a logic valve-340, an oil supplementing one-way valve-350, a second overflow valve-360, a third overflow valve-370, a junction box-380, a pressure sensor-390, an oil cylinder-400, an air bag-510, an inflation valve-520 and a position sensor-600.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present disclosure.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The electric jacking system and device for the ro-ro vessel provided by the embodiment of the application are described in detail through specific embodiments and application scenarios thereof in combination with the accompanying drawings.

As shown in fig. 1, the embodiment of the present application provides an electric jacking system for a roll-on-roll-off ship, including an oil cylinder 400, a control valve group 300, an oil tank 100, and a motor-pump group, wherein a piston rod is arranged in the oil cylinder 400, the interior of the oil cylinder 400 is divided into a rod cavity and a rodless cavity by a piston, and the motor-pump group is communicated with the oil tank 100, and can be used for actively providing a pressure oil source and controlling the action of the piston rod in the oil cylinder 400 through the control valve group 300.

The motor-pump set is integrated on the control valve set 300 and comprises a driving motor 210 and a bidirectional quantitative hydraulic pump, the bidirectional quantitative hydraulic pump is soaked in the oil tank 100, the driving motor 210 and the bidirectional quantitative hydraulic pump are connected through a coupler 220, the bidirectional quantitative hydraulic pump is specifically a gear pump 230 which can rotate in two directions and provide a pressure oil source at a fixed displacement in two directions, a first end of the gear pump 230 is connected with a rod cavity of the oil cylinder 400, and a second end of the gear pump 230 is connected with a rodless cavity of the oil cylinder 400, so that a closed loop is formed.

Meanwhile, the motor-pump set directly controls the driving motor 210 to rotate forward and backward through an external power supply of the junction box 380, so that the oil supply and oil absorption steering switching of the gear pump 230 is realized.

The control valve set 300 includes a first pilot operated check valve 320 disposed between the second end of the gear pump 230 and the rodless cavity passage of the cylinder 400, and specifically, the inlet end of the first pilot operated check valve 320 communicates with the second end of the gear pump 230 and the outlet end communicates with the rodless cavity of the cylinder 400.

Under the active extension working condition, the driving motor 210 rotates positively, the gear pump 230 outputs pressure oil at the second end, the pressure oil directly reaches the rodless cavity of the oil cylinder 400 through the first hydraulic control one-way valve 320, the piston rod in the oil cylinder 400 performs the active extension action under the hydraulic action, and the oil in the rod cavity of the oil cylinder 400 returns to the first end oil suction port of the gear pump 230 through the closed loop.

In a preferred embodiment, as shown in fig. 1, the valve set 300 further includes a second hydraulic check valve 330, an inlet end of the second hydraulic check valve 330 is communicated with the oil tank 100, an outlet end of the second hydraulic check valve 330 is communicated with the first hydraulic check valve 320 and the pipeline between the rod-free cavities of the oil cylinder 400, wherein the pilot ports of the first hydraulic check valve 320 and the second hydraulic check valve 330 are communicated with the pipeline between the first end of the gear pump 230 and the pipeline between the rod cavities of the oil cylinder 400.

Under the condition of an active withdrawing work, the driving motor 210 rotates reversely, the gear pump 230 outputs pressure oil at the first end, the pressure oil directly reaches the rod cavity of the oil cylinder 400, meanwhile, hydraulic pressure is fed back to the pilot ports of the first hydraulic control one-way valve 320 and the second hydraulic control one-way valve 330, so that the first hydraulic control one-way valve 320 and the second hydraulic control one-way valve 330 on the loop of the rod-free cavity of the oil cylinder 400 are opened, the piston rod in the oil cylinder 400 performs the active withdrawing action, the part of oil return fluid returns to the oil suction port at the second end of the gear pump 230 through the closed loop, and redundant oil directly flows back to the oil tank 100.

In a preferred embodiment, as shown in fig. 1, the control valve set 300 further includes a logic valve 340, a first overflow valve 310, and an oil-supplementing check valve 350, wherein an oil inlet end of the logic valve 340 communicates with the first pilot-controlled check valve 320 and the pipeline between the rod-free cavities of the cylinder 400, an oil outlet end communicates with the oil tank 100, a control end communicates with the first pilot-controlled check valve 320 and the pipeline between the second ends of the gear pump 230, a first end of the first overflow valve 310 communicates with the oil outlet end of the logic valve 340, a second end communicates with the pipeline between the oil outlet end of the logic valve 340 and the oil tank 100, an inlet end of the oil-supplementing check valve 350 communicates with the second end of the first overflow valve 310, the pipeline between the oil tank 100, and the pipeline between the outlet end and the first end of the gear pump 230, and the pipeline between the rod cavities of the cylinder 400.

Under the working condition of active extension, the gear pump 230 outputs pressure oil at the second end, the control end of the logic valve 340 drives the oil inlet end and the oil outlet end of the logic valve 340 to be in a closed state, under the working condition of passive buffer retraction, the gear pump 230 is not started at the moment, a piston rod in the oil cylinder 400 is pushed back under the action of a springboard, the logic valve 340 is reset under the action of spring force to enable the oil inlet end and the oil outlet end to be in an open position, the first overflow valve 310 is used for adjusting the magnitude of passive buffer force, hydraulic oil in a rodless cavity of the oil cylinder 400 flows back to the oil tank 100 through the logic valve 340 and the first overflow valve 310, and meanwhile, oil is supplemented into a closed loop through the oil supplementing one-way valve 350.

In the embodiment of the application, adopt foretell electronic top of ro-Ro vessel to push away system, with hydro-cylinder 400, valve unit 300, oil tank 100, the motor pump package is integrated together in order to form closed system, occupation space is little, can satisfy the equipment fixing requirement better, not only can realize the initiative top of hydro-cylinder 400 through valve unit 300 simultaneously, passive buffering is withdrawed, and can realize the initiative of hydro-cylinder 400 and withdraw at springboard operating position switching in-process, prevent springboard and thrustor collision, suitability and fail safe nature are higher.

In a preferred embodiment, as shown in fig. 1, the control valve set 300 further includes a second overflow valve 360 and a third overflow valve 370, a first end of the second overflow valve 360 is communicated with the outlet of the second hydraulic check valve 330, the pipeline between the rodless cavity of the cylinder 400, a second end of the second overflow valve 360 is communicated with the inlet of the second hydraulic check valve 330 and the pipeline between the oil tank 100, a first end of the third overflow valve 370 is communicated with the outlet of the oil recharging check valve 350, the pipeline between the rod cavity of the cylinder 400, and the pipeline between the second end of the third overflow valve 310 and the inlet of the oil recharging check valve 350.

In the embodiment of the application, by adopting the electric jacking system for the roll-on-roll-off ship, the second overflow valve 360 and the third overflow valve 370 are respectively arranged in the extending loop and the retracting loop of the piston rod in the oil cylinder 400 for pressure protection, so that overpressure damage of the jacking device during abnormal operation can be avoided.

In a preferred embodiment, as shown in fig. 1, an air bag 510 and an inflation valve 520 are built in the oil tank 100, and the air bag 510 can be pre-charged with a certain pressure through the inflation valve 520 so as to prevent the gear pump 230 from being empty during operation.

In a preferred embodiment, as shown in fig. 1, a pressure sensor 390 is included that is connected to the junction box 380 using a connector harness, the pressure sensor 390 being capable of monitoring the pusher system pressure for more effective pusher control and protection.

As shown in fig. 2 to 5, an embodiment of the present application further provides an electric thrustor for a roll-on-roll-off ship, which employs the electric thrustor system for a roll-on-roll-off ship described in any of the above embodiments, wherein a junction box 380 is fixedly disposed on the control valve group 300 and is externally connected to a cable, an oil port of a rod cavity of the oil cylinder 400 is connected to the control valve group 300 through a steel pipe, and an oil port of a rodless cavity of the oil cylinder 400 is connected to the control valve group 300 through an oil tank 100 in a built-in manner, so as to optimize the overall size of the apparatus and reduce the risk of oil leakage.

It can be understood that, depending on the application, the piston inside the cylinder 400 can be provided without an oil passage.

As shown in fig. 5, the airbag 510 is disposed inside the fuel tank 100, and the inflation valve 520 is disposed on an outer surface of the fuel tank 100 and extends to communicate with the airbag 510.

In the embodiment of the application, adopt foretell electronic thrustor of ro-Ro vessel, with machinery, hydraulic pressure, electric integration together, external interface only supplies power to the thrustor system through a cable, need not additionally lay hydraulic line, reduces oil leakage risk and fault point, and equipment maintenance is convenient, and the reliability is higher.

In a preferred embodiment, as shown in fig. 3 and 4, a position sensor 600 is disposed on the cylinder 400 at a position corresponding to the rod cavity, and the position sensor 600 is used for detecting the position of the piston in the cylinder 400 under the active extension condition, so as to ensure the operation stability of the thruster.

It will be appreciated that a position sensor 600 may also be provided at a corresponding location of the ram 400 with respect to the rodless chamber to sense the position of the piston within the ram 400 during the active retraction condition.

In a preferred embodiment, the drive motor 210 is stopped by logic control to avoid overheating the pusher system for long periods of full load operation.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a component of' 8230; \8230;" does not exclude the presence of another like element in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An electric pushing system of a roll-on-roll-off ship is characterized by comprising an oil tank, an oil cylinder, a motor pump set and a control valve set, wherein a piston rod is arranged in the oil cylinder and is divided into a rod cavity and a rodless cavity by a piston;

the oil inlet end of the logic valve is communicated with the first hydraulic control one-way valve and the pipeline between the rodless cavities, the oil discharge end and the pipeline between the oil outlet end and the oil tank, and the control end is communicated with the first hydraulic control one-way valve and the pipeline between the two-way quantitative hydraulic pump and the second end.

2. The ro-ro vessel electric jacking system according to claim 1, wherein said motor-pump assembly is integrated on said control valve assembly, further comprising a driving motor for driving said bi-directional fixed displacement hydraulic pump;

3. The ro-ro vessel electric thrusting system according to claim 1 or 2, further comprising a pressure sensor connected to the junction box by a connector harness and adapted to detect oil pressure.

4. The electric jacking system for the ro-ro vessel according to claim 1 or 2, wherein the control valve set further comprises a first overflow valve, a first end of the first overflow valve is communicated with the oil outlet end of the logic valve, and a second end of the first overflow valve is communicated with a pipeline between the oil outlet end of the logic valve and the oil tank.

5. The electric jacking system for ro-ro ships according to claim 4, wherein the control valve set further comprises an oil-supplementing check valve, and the inlet end of the oil-supplementing check valve is communicated with the second end of the first overflow valve and the pipeline between the oil tanks, and the outlet end of the oil-supplementing check valve is communicated with the first end of the bidirectional constant-displacement hydraulic pump and the pipeline between the rod cavities.

6. The electric jacking system for ro-ro ships according to claim 1, wherein said control valve set further comprises a second hydraulic check valve, an inlet end of said second hydraulic check valve is communicated with said oil tank, and an outlet end of said second hydraulic check valve is communicated with a pipeline between said first hydraulic check valve and said rodless cavity;

7. The electric jacking system for the ro-ro vessel according to claim 5 or 6, wherein the control valve set further comprises a second overflow valve and a third overflow valve, wherein the first end of the second overflow valve is communicated with the outlet end of the second hydraulic control one-way valve and the pipeline between the rodless cavities, and the second end of the second overflow valve is communicated with the inlet end of the second hydraulic control one-way valve and the pipeline between the oil tank;

8. The ro-ro boat electric thruster system as claimed in claim 1 or 2 further comprising an air bag built into the tank and an inflation valve communicating with the air bag.

9. An electric jacking device for a ro-ro ship, characterized in that the electric jacking system for the ro-ro ship of any one of claims 1 to 8 is adopted, wherein a junction box is fixedly arranged on a control valve group and is externally connected with a cable, an oil port of the rod cavity is connected into the control valve group through a steel pipe, and an oil port of the rodless cavity is connected into the control valve group through the inside of the oil tank.

10. The rolling vessel electric thruster of claim 9, wherein a position sensor for monitoring the position of the piston is provided on the cylinder at a position corresponding to the rod chamber and/or the rod chamber.