CN107725500A - A kind of cylinder type hydraulic system for lifting - Google Patents
A kind of cylinder type hydraulic system for lifting Download PDFInfo
- Publication number
- CN107725500A CN107725500A CN201710760974.3A CN201710760974A CN107725500A CN 107725500 A CN107725500 A CN 107725500A CN 201710760974 A CN201710760974 A CN 201710760974A CN 107725500 A CN107725500 A CN 107725500A
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- valve
- mouths
- oil
- check valve
- hydraulic system
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Classifications
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- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
- E02B17/08—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
- E02B17/0809—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering the equipment being hydraulically actuated
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- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/003—Systems with load-holding valves
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- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a kind of cylinder type hydraulic system for lifting, belong to field of hydraulic control.The cylinder type hydraulic system for lifting, including：First check valve, second check valve, 3rd check valve, 4th check valve, three position four-way directional control valve, first inserted valve, second inserted valve, 3rd inserted valve, 4th inserted valve and even number execution module, each execution module includes lift cylinder, rodless cavity of the oil inlet of first check valve respectively with each lift cylinder connects, rod chamber of the oil inlet of second check valve respectively with each lift cylinder connects, oil inlet of the oil-out of the oil-out of first check valve and the second check valve with the 3rd check valve connects, the oil-out of 3rd check valve connects with the oil-out of the 4th check valve and the P mouths of three position four-way directional control valve respectively, the oil inlet of 4th check valve connects with the A mouths of the first inserted valve and the A mouths of the second inserted valve respectively.The cylinder type hydraulic system for lifting realizes the pressurize of the rodless cavity of lift cylinder.
Description
Technical field
The present invention relates to field of hydraulic control, more particularly to a kind of cylinder type hydraulic system for lifting.
Background technology
Self-elevating ocean platform applies in general to neritic province domain work, the exploitation for offshore oil.Field is used some
Conjunction needs self-elevating ocean platform to be chronically at status of support.The jacking equipment used for this operating mode self-elevating ocean platform
Generally cylinder type elevating mechanism.
A kind of existing cylinder type elevating mechanism includes：Rotating ring beam, determine ring beam, lift cylinder, wedge bracket and spud leg, rotating ring beam
And determine to connect by lift cylinder between ring beam, rotating ring beam and determine ring beam and be respectively sleeved on spud leg, determine ring beam and pass through wedge bracket
It is fixedly connected with self-elevating ocean platform, offers pin hole on spud leg along its length, in rotating ring beam and is determined on ring beam respectively
It is provided with rotating ring beam latch assembly on insertion spud leg and determines ring beam latch assembly, is inserted by the flexible and rotating ring beam of lift cylinder
Pin assemblies and the alternating plug action for determining ring beam latch assembly, it is possible to achieve the lifting action of self-elevating ocean platform.Existing one
The hydraulic system of kind cylinder type elevating mechanism is using three position four-way directional control valve control lift cylinder, specifically, 3-position 4-way commutation
The A mouths of valve connect with the rod chamber of lift cylinder, and the B mouths of three position four-way directional control valve connect with the rodless cavity of lift cylinder, three
The T mouths of four-way reversing valve connect with fuel tank, and P mouths and the external control oil stream of three position four-way directional control valve enter pipeline connection.
During the present invention is realized, inventor has found that prior art at least has problems with：
When self-elevating ocean platform is in floating state, it is necessary to by between lift cylinder and three position four-way directional control valve
Loine pressure, so as to keep self-elevating ocean platform motionless relative to spud leg.But because three position four-way directional control valve is without close
The performance of pressurize is sealed, this can cause the loine pressure between lift cylinder and three position four-way directional control valve gradually to reduce, make jack up
Ocean platform glides, and influences the normal work of self-elevating ocean platform.
The content of the invention
In order to solve the problems, such as that the security of self-elevating ocean platform in the prior art is low, the embodiments of the invention provide one
Kind cylinder type hydraulic system for lifting.The technical scheme is as follows：
The embodiments of the invention provide a kind of cylinder type hydraulic system for lifting, including：First check valve, the second check valve,
3rd check valve, the 4th check valve, three position four-way directional control valve, the first inserted valve, the second inserted valve, the 3rd inserted valve, the 4th insert
Valve and even number execution module are filled, each execution module includes lift cylinder, the oil inlet point of first check valve
Rodless cavity not with each lift cylinder connects, and the oil inlet of second check valve has with each lift cylinder
Rod cavity connects, and the oil-out of the oil-out of first check valve and second check valve enters with the 3rd check valve
Hydraulic fluid port connects, and the oil-out of the 3rd check valve commutates with the oil-out of the 4th check valve and the 3-position 4-way respectively
The P mouths connection of valve, the oil inlet of the 4th check valve respectively with the A mouths of first inserted valve and second inserted valve
A mouths connect, the A mouths of the three position four-way directional control valve respectively with the X mouths of second inserted valve and the X mouths of the 3rd inserted valve
Connection, the B mouths of the three position four-way directional control valve connect with the X mouths of first inserted valve and the X mouths of the 4th inserted valve respectively
Logical, the oil inlet of the A mouths of the B mouths of first inserted valve and the 3rd inserted valve respectively with first check valve connects,
Oil inlet of the A mouths of the B mouths of second inserted valve and the 4th inserted valve respectively with second check valve connects, described
The B mouths of the B mouths of 3rd inserted valve and the 4th inserted valve connect with fuel tank respectively.
Specifically, each execution module includes：5th inserted valve, pilot valve and counterbalance valve, for any one institute
Execution module is stated, the A mouths of the 5th inserted valve connect with the oil inlet of first check valve, the B of the 5th inserted valve
Mouthful being connected with the rodless cavity of the lift cylinder, the X mouths of the 5th inserted valve connect with the A mouths of the pilot valve, and described the
The B mouths of five inserted valves also connect with the B mouths of the pilot valve and the X1 mouths of the pilot valve respectively, the C mouths of the pilot valve with
The fuel tank connection, the X2 mouths of the pilot valve connect with the oil-out of the 3rd check valve, the oil inlet of the counterbalance valve
Connected with the B mouths of the 4th inserted valve, the oil-out of the counterbalance valve connects with the fuel tank.
Further, each execution module includes：Safety valve, for execution module any one described, the peace
The oil inlet of full valve connects with the rodless cavity of the lift cylinder, and the oil-out of the safety valve connects with the fuel tank.
Further, after the oil-out of the safety valve connects with the oil-out of the 5th check valve again with the fuel tank
Connection.
Further, the cylinder type hydraulic system for lifting also includes：5th check valve, the oil-feed of the 5th check valve
Mouth connects with the oil-out of the safety valve, and the oil-out of the 5th check valve connects with the rod chamber of the lift cylinder.
Further, each execution module includes：Choke valve, for execution module any one described, the section
First hydraulic fluid port of stream valve connects with the X2 mouths of the pilot valve, the second hydraulic fluid port of the choke valve and going out for the 3rd check valve
Hydraulic fluid port connects.
Further, connected for execution module any one described, the B mouths of the pilot valve with the X1 mouths of the pilot valve
Connected again with the B mouths of the inserted valve afterwards.
Specifically, the cylinder type hydraulic system for lifting also includes：6th check valve, the oil inlet of the 6th check valve
Connected with the P mouths of the three position four-way directional control valve, the oil-out of the 6th check valve connects with outer oil-control control mouth.
Specifically, it is unidirectional with the described 4th again after the connection of the A mouths of the A mouths of first inserted valve and second inserted valve
The oil inlet connection of valve.
Specifically, it is unidirectional with described first again after the connection of the A mouths of the B mouths of first inserted valve and the 3rd inserted valve
It is unidirectional with described second again after the A mouths connection of the oil inlet connection of valve, the B mouths of second inserted valve and the 4th inserted valve
The oil inlet connection of valve.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：When the rodless cavity of lift cylinder needs pressurize
When, the P mouths of three position four-way directional control valve connect with the 3rd check valve and the 4th check valve respectively, and the P mouths of three position four-way directional control valve lead to
Cross and compare the pressure from oil circuit where the 3rd check valve and the 4th check valve, so as to select pressure highest oil circuit to flow into three
The P mouths of four-way reversing valve, but the 3rd check valve connects with the first check valve and the second check valve, then, the 3rd check valve leads to
Cross and compare the pressure from oil circuit where the first check valve and the second check valve, so as to select pressure highest oil circuit to flow into the 3rd
Check valve, this fluid for flowing into the P mouths of three position four-way directional control valve are by comparing the rodless cavity from lift cylinder, having bar
After the pressure of the A mouths of chamber and the first inserted valve, the P that selection wherein pressure highest fluid flows into three position four-way directional control valve is intraoral,
The A mouths of three position four-way directional control valve connect with the X mouths of the second inserted valve and the X mouths of the 3rd inserted valve respectively, three position four-way directional control valve
B mouths connected respectively with the X mouths of the first inserted valve and the X mouths of the 4th inserted valve, this cause the X mouths of the first inserting, second inserting
The pressure of the X mouths of the X mouths of valve, the X mouths of the 3rd inserted valve and the 4th inserted valve for be in whole cylinder type hydraulic system for lifting most
High oil liquid pressure, and the oil effect area at the X mouths of four inserted valves is more than the fluid effect of the A mouths of four inserted valves,
When this causes the X mouths of four inserted valves not connected with fuel tank, being in four inserted valves can not be in the pressure of the A mouths of the first inserted valve
It is opened under power, it is achieved thereby that the pressurize of the rodless cavity of lift cylinder, and then self-elevating ocean platform is kept relative to stake
Leg is motionless.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the hydraulic schematic diagram of the cylinder type hydraulic system for lifting of single execution module provided in an embodiment of the present invention；
Fig. 2 is the hydraulic schematic diagram of the cylinder type hydraulic system for lifting of two execution modules provided in an embodiment of the present invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
Embodiment
The embodiments of the invention provide a kind of cylinder type hydraulic system for lifting, the cylinder type hydraulic system for lifting is applied to oil
Cylinder formula elevating mechanism, the cylinder type elevating mechanism include：Rotating ring beam, determine ring beam, wedge bracket, spud leg and even number lift cylinder,
As shown in figure 1, being introduced below by taking single lift cylinder as an example, the cylinder type hydraulic system for lifting includes：First check valve
1st, the second check valve 2, the 3rd check valve 3, the 4th check valve 4, three position four-way directional control valve 5, the first inserted valve 6, the second inserted valve
7th, the 3rd inserted valve 8, the 4th inserted valve 9 and even number execution module, each execution module include lift cylinder a.First is single
Connected to rodless cavity a1 of the oil inlet respectively with each lift cylinder a of valve 1, the oil inlet of the second check valve 2 respectively with it is each
The oil-out of lift cylinder a rod chamber a2 connections, the oil-out of the first check valve 1 and the second check valve 2 is unidirectional with the 3rd
The oil inlet connection of valve 3, the oil-out of the 3rd check valve 3 oil-out and three position four-way directional control valve 5 with the 4th check valve 4 respectively
The connection of P mouths, the oil inlet of the 4th check valve 4 connects with the A mouths of the first inserted valve 6 and the A mouths of the second inserted valve 7 respectively, three
The A mouths of position and four-way reversing valve 5 connect with the X mouths of the second inserted valve 7 and the X mouths of the 3rd inserted valve 8 respectively, three position four-way directional control valve
5 B mouths connect with the X mouths of the first inserted valve 6 and the X mouths of the 4th inserted valve 9 respectively, the B mouths of the first inserted valve 6 and the 3rd inserting
Oil inlet of the A mouths of valve 8 respectively with the first check valve 1 connects, the B mouths of the second inserted valve 7 and the A mouths difference of the 4th inserted valve 9
Connected with the oil inlet of the second check valve 2, the B mouths of the 3rd inserted valve 8 and the B mouths of the 4th inserted valve 9 connect with fuel tank b respectively.
Specifically, each execution module includes：5th inserted valve 10, pilot valve 11 and counterbalance valve 15, for any one
Execution module, the A mouths of the 5th inserted valve 10 connect with the oil inlet of the first check valve 1, B mouths and the lifting oil of the 5th inserted valve 10
Cylinder a rodless cavity a1 connections, the X mouths of the 5th inserted valve 10 connect with the A mouths of pilot valve 11, and the B mouths of the 5th inserted valve 10 also divide
Do not connected with the B mouths of pilot valve 11 and the X1 mouths of pilot valve 11, the C mouths of pilot valve 11 connect with fuel tank b, the X2 mouths of pilot valve 11
Connected with the oil-out of the 3rd check valve 3, the oil inlet of counterbalance valve 15 is inserted with the B mouths of the 4th inserted valve 9 and the described 3rd respectively
The B mouths connection of valve 8 is filled, the oil-out of counterbalance valve 15 connects with fuel tank b.When self-elevating ocean platform is in and declines operating mode, three
The electromagnet of 5 left position of position and four-way reversing valve obtains electric, and the P mouths of three position four-way directional control valve 5 connect with the A mouths of three position four-way directional control valve 5,
Main system pressure oil P1 hydraulic fluid ports pass through the A mouths of the second inserted valve 7, flow through B mouths the having into lift cylinder a of the second inserted valve 7
In rod cavity a2, by the pressure ratio of the first check valve 1 and the second check valve 2 relatively after, selection high oil circuit fluid of pressure in both
It flow at the X2 mouths of pilot valve 11, the right position of pilot valve 11 is worked, now the C mouths of the A mouths of pilot valve 11 and pilot valve 11 connects
Logical, the C mouths of pilot valve 11 connect with fuel tank b so that the X mouths of the 5th inserted valve 10 connect with fuel tank b, so that the 5th inserted valve
10 open, lift cylinder a rodless cavity a1 oil returns, and fluid flows through counterbalance valve 15 by the 3rd inserted valve 8 and enters oil return box b, back pressure
The pressure of valve 15 is now to balance the pressure of the load of self-elevating ocean platform, and counterbalance valve 15 is in open mode, fluid gram
Take the pressure current oil return box b of counterbalance valve 15.When self-elevating ocean platform declines operating mode, lift cylinder a rodless cavity a1 is used for
The load of self-elevating ocean platform is kept, because the load is larger so that the pipeline connected with lift cylinder a rodless cavity a1 holds
Booster easily occurs, when booster occurs for the pipeline, the pipeline is in decompression state, and rodless cavity a1 can not bear any load, have
Rod cavity a2 input pressure is also decreased to rapidly zero, the oil that now the X2 mouths of pilot valve 11 introduce from rodless cavity a1 and rod chamber a2
Hydraulic coupling is also zero, and pilot valve 11 is in left position all the time, and the 5th inserted valve 10 is closed, lift cylinder a attonitys, from
Lift-type ocean platform is in hold mode.Self-elevating ocean platform can be so avoided to be in the state of stall decline, so as to carry
The high security of self-elevating ocean platform.
Further, each execution module may each comprise：Safety valve 12, for any one execution module, safety valve 12
Oil inlet connected with lift cylinder a rodless cavity a1, the oil-out of safety valve 12 connects with fuel tank b.When with lift cylinder a's
When oil liquid pressure in the pipeline of rodless cavity a1 connections increases to over setting, safety valve 12 is opened, and part fluid is flow to oil
Case b, so as to avoid that booster occurs because of high pressure with the pipeline that lift cylinder a rodless cavity a1 is connected.
Further, the cylinder type hydraulic system for lifting can also include：5th check valve 13, the 5th check valve 13 enter
Hydraulic fluid port connects with the oil-out of safety valve 12, and the oil-out of the 5th check valve 13 connects with lift cylinder a rod chamber a2.5th
Check valve 13 can introduce the fluid that fluid is flowed out by safety valve 12 in lift cylinder a rod chamber a2, so as to improve oil
The utilization ratio of liquid.
Further, for any one execution module, the oil-out of the oil-out of safety valve 12 and the 5th check valve 13 connects
Connected again with fuel tank b after logical.Oil circuit can so be simplified, so as to reduce the volume of cylinder type hydraulic system for lifting.
Further, each execution module may each comprise：Choke valve 14, for any one execution module, choke valve 14
The first hydraulic fluid port connected with the X2 mouths of pilot valve 11, the second hydraulic fluid port of choke valve 14 connects with the oil-out of the 3rd check valve 3.Section
Valve 14 is flowed to be used to control the oil pressure pressure at the X2 mouths for flowing into pilot valve 11.
Further, for any one execution module, again with the after the X1 mouths connection of the B mouths and pilot valve 11 of pilot valve 11
The B mouths connection of five inserted valves 10.Oil circuit can so be simplified, so as to reduce the volume of cylinder type hydraulic system for lifting.
Specifically, the cylinder type hydraulic system for lifting can also include：6th check valve 16, the oil-feed of the 6th check valve 16
Mouth connects with the P mouths of three position four-way directional control valve 5, and the oil-out of the 6th check valve 16 connects with outer oil-control control P3 mouths.Pass through
Six check valves 16 introduce outer oil-control to the P mouths of three position four-way directional control valve 5, and the P mouths of three position four-way directional control valve 5 come from the by comparing
The pressure of three check valves 3, the 4th check valve 4 and the place oil circuit of the 6th check valve 16, so as to select pressure highest oil circuit to flow into
The P mouths of three position four-way directional control valve 5, introducing outer oil-control to the P mouths of three position four-way directional control valve 5 by the 6th check valve 16 can increase
Three position four-way directional control valve 5 selects the chance of oil circuit, so as to ensure that the intraoral pressure of the P for flowing into three position four-way directional control valve 5 is higher, enters
The sealing property of the first inserted valve 6, the second inserted valve 7, the 3rd inserted valve 8 and the 4th inserted valve 9 is effectively ensured in one step.
Specifically, the oil-feed with the 4th check valve 4 again after the connection of the A mouths of the A mouths of the first inserted valve 6 and the second inserted valve 7
Mouth connection.Oil circuit can so be simplified, so as to reduce the volume of cylinder type hydraulic system for lifting.
Specifically, the oil-feed with the first check valve 1 again after the connection of the A mouths of the B mouths of the first inserted valve 6 and the 3rd inserted valve 8
Mouth connection.Oil circuit can so be simplified, so as to reduce the volume of cylinder type hydraulic system for lifting.
Specifically, the oil-feed with the second check valve 2 again after the connection of the A mouths of the B mouths of the second inserted valve 7 and the 4th inserted valve 9
Mouth connection.Oil circuit can so be simplified, so as to reduce the volume of cylinder type hydraulic system for lifting.
The cylinder type hydraulic system for lifting is in real work, and in order to ensure to lift, execution module corresponds to even number arrangement,
When execution module is two, its hydraulic schematic diagram is shown in Fig. 2.
The operation principle of cylinder type hydraulic system for lifting provided in an embodiment of the present invention is following is a brief introduction of, specifically such as
Under：
When self-elevating ocean platform is in floating state, three position four-way directional control valve is middle position, lift cylinder a rodless cavity
Fluid in a1 needs pressurize, and now, the P mouths of three position four-way directional control valve 5 connect with the 3rd check valve 3 and the 4th check valve 4 respectively
It is logical, the P mouths of three position four-way directional control valve 5 by comparing the pressure from the 3rd check valve 3 and the place oil circuit of the 4th check valve 4, from
And select pressure highest oil circuit to flow into the P mouths of three position four-way directional control valve 5, but the 3rd check valve 3 and the first check valve 1 and the
Two check valves 2 connect, then, the 3rd check valve 3 is by comparing from the first check valve 1 and the place oil circuit of the second check valve 2
Pressure, so as to select pressure highest oil circuit to flow into the 3rd check valve 3, this flows into the oil of the P mouths of three position four-way directional control valve 5
Liquid be by comparing the pressure of the rodless cavity a1 from lift cylinder a, rod chamber a2 and the first inserted valve 6 A mouths after, select it
The P that middle pressure highest fluid flows into three position four-way directional control valve 5 is intraoral, and the A mouths of three position four-way directional control valve 5 insert with second respectively
The connection of the X mouths of the X mouths of valve 7 and the 3rd inserted valve 8, the B mouths of three position four-way directional control valve 5 respectively with the X mouths of the first inserted valve 6 and the
Four inserted valves 9 X mouths connection, this cause the X mouths of the first inserted valve 6, the X mouths of the second inserted valve 7, the 3rd inserted valve 8 X mouths and
The pressure of the X mouths of 4th inserted valve 9 is highest oil liquid pressure in whole cylinder type hydraulic system for lifting, and four inserted valves
The oil effect area at X mouths is more than the fluid effect of the A mouths of four inserted valves, this cause the X mouths of four inserted valves not with oil
It is that can not be opened under the pressure of the A mouths of the first inserted valve in four inserted valves when case b is connected.
When the electromagnet on the right of three position four-way directional control valve 5 obtains electric, fluid flow to three by the P mouths of three position four-way directional control valve 5
After the B mouths of position and four-way reversing valve 5, then the X mouths of the first inserted valve 6 and the X mouths of the 4th inserted valve 9 are flow to respectively, the first inserted valve 6
Closed with the 4th inserted valve 9, the second inserted valve 7 and the 3rd inserted valve 8 connect with the B mouths of three position four-way directional control valve 5 so that the
Two inserted valves 7 and the 3rd inserted valve 8 are opened, and the fluid of oil-feed P1 mouths is flow to the B of the second inserted valve 7 by the A mouths of the second inserted valve 7
After mouthful, flow into lift cylinder a rod chamber a2, realize lift cylinder a retraction.
When the electromagnet on the left side of three position four-way directional control valve 5 obtains electric, fluid flow to three by the P mouths of three position four-way directional control valve 5
After the A mouths of position and four-way reversing valve 5, then the X mouths of the second inserted valve 7 and the X mouths of the 3rd inserted valve 8 are flow to respectively, the second inserted valve 7
Closed with the 3rd inserted valve 8, the first inserted valve 6 and the 4th inserted valve 9 connect with the B mouths of three position four-way directional control valve 5 so that the
One inserted valve 6 and the 4th inserted valve 9 are opened, and after fluid is flow to the B mouths of the first inserted valve 6 by the A mouths of the first inserted valve 6, are flowed into
In lift cylinder a rodless cavity a1, lift cylinder a stretching is realized.
The embodiments of the invention provide a kind of cylinder type hydraulic system for lifting, when the rodless cavity of lift cylinder needs pressurize
When, the P mouths of three position four-way directional control valve connect with the 3rd check valve and the 4th check valve respectively, and the P mouths of three position four-way directional control valve lead to
Cross and compare the pressure from oil circuit where the 3rd check valve and the 4th check valve, so as to select pressure highest oil circuit to flow into three
The P mouths of four-way reversing valve, but the 3rd check valve connects with the first check valve and the second check valve, then, the 3rd check valve leads to
Cross and compare the pressure from oil circuit where the first check valve and the second check valve, so as to select pressure highest oil circuit to flow into the 3rd
Check valve, this fluid for flowing into the P mouths of three position four-way directional control valve are by comparing the rodless cavity from lift cylinder, having bar
After the pressure of the A mouths of chamber and the first inserted valve, the P that selection wherein pressure highest fluid flows into three position four-way directional control valve is intraoral,
The A mouths of three position four-way directional control valve connect with the X mouths of the second inserted valve and the X mouths of the 3rd inserted valve respectively, three position four-way directional control valve
B mouths connected respectively with the X mouths of the first inserted valve and the X mouths of the 4th inserted valve, this cause the X mouths of the first inserting, second inserting
The pressure of the X mouths of the X mouths of valve, the X mouths of the 3rd inserted valve and the 4th inserted valve for be in whole cylinder type hydraulic system for lifting most
High oil liquid pressure, and the oil effect area at the X mouths of four inserted valves is more than the fluid effect of the A mouths of four inserted valves,
When this causes the X mouths of four inserted valves not connected with fuel tank, being in four inserted valves can not be in the pressure of the A mouths of the first inserted valve
It is opened under power, it is achieved thereby that the pressurize of the rodless cavity of lift cylinder, and then self-elevating ocean platform is kept relative to stake
Leg is motionless.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (10)
1. a kind of cylinder type hydraulic system for lifting, it is characterised in that the cylinder type hydraulic system for lifting includes：First is unidirectional
Valve, the second check valve, the 3rd check valve, the 4th check valve, three position four-way directional control valve, the first inserted valve, the second inserted valve, the 3rd
Inserted valve, the 4th inserted valve and even number execution module, each execution module include lift cylinder, and described first is unidirectional
Rodless cavity of the oil inlet of valve respectively with each lift cylinder connects, the oil inlet of second check valve respectively with it is each
The rod chamber connection of the lift cylinder, the oil-out of the oil-out of first check valve and second check valve is and institute
State the oil inlet connection of the 3rd check valve, the oil-out of the 3rd check valve respectively with the oil-out of the 4th check valve and
The P mouths connection of the three position four-way directional control valve, the oil inlet of the 4th check valve respectively with the A mouths of first inserted valve and
The A mouths connection of second inserted valve, the A mouths of the three position four-way directional control valve X mouths with second inserted valve and institute respectively
State the X mouths connection of the 3rd inserted valve, the B mouths of the three position four-way directional control valve respectively with the X mouths of first inserted valve and described
The A mouths of the X mouths connection of 4th inserted valve, the B mouths of first inserted valve and the 3rd inserted valve are single with described first respectively
Connected to the oil inlet of valve, the A mouths of the B mouths of second inserted valve and the 4th inserted valve respectively with second check valve
Oil inlet connection, the B mouths of the 3rd inserted valve and the B mouths of the 4th inserted valve connect with fuel tank respectively.
2. cylinder type hydraulic system for lifting according to claim 1, it is characterised in that each execution module is wrapped
Include：5th inserted valve, pilot valve and counterbalance valve, for execution module any one described, the A mouths of the 5th inserted valve with it is described
The oil inlet connection of first check valve, the B mouths of the 5th inserted valve connect with the rodless cavity of the lift cylinder, and the described 5th
The X mouths of inserted valve connect with the A mouths of the pilot valve, the B mouths of the 5th inserted valve also respectively with the B mouths of the pilot valve and
The X1 mouths connection of the pilot valve, the C mouths of the pilot valve connect with the fuel tank, the X2 mouths of the pilot valve and the described 3rd
The oil-out connection of check valve, the oil inlet of the counterbalance valve connect with the B mouths of the 4th inserted valve, and the counterbalance valve goes out
Hydraulic fluid port connects with the fuel tank.
3. cylinder type hydraulic system for lifting according to claim 2, it is characterised in that each execution module is wrapped
Include：Safety valve, for execution module any one described, the rodless cavity of the oil inlet of the safety valve and the lift cylinder connects
Logical, the oil-out of the safety valve connects with the fuel tank.
4. cylinder type hydraulic system for lifting according to claim 3, it is characterised in that the cylinder type hydraulic system for lifting
Also include：5th check valve, the oil inlet of the 5th check valve connect with the oil-out of the safety valve, and the described 5th is unidirectional
The oil-out of valve connects with the rod chamber of the lift cylinder.
5. cylinder type hydraulic system for lifting according to claim 4, it is characterised in that the oil-out of the safety valve and institute
Connected again with the fuel tank after stating the oil-out connection of the 5th check valve.
6. cylinder type hydraulic system for lifting according to claim 2, it is characterised in that each execution module is wrapped
Include：Choke valve, for execution module any one described, the first hydraulic fluid port of the choke valve connects with the X2 mouths of the pilot valve,
Second hydraulic fluid port of the choke valve connects with the oil-out of the 3rd check valve.
7. cylinder type hydraulic system for lifting according to claim 2, it is characterised in that for execution mould any one described
Block, connected again with the B mouths of the inserted valve after the X1 mouths connection of the B mouths and the pilot valve of the pilot valve.
8. cylinder type hydraulic system for lifting according to claim 1, it is characterised in that the cylinder type hydraulic system for lifting
Also include：6th check valve, the oil inlet of the 6th check valve connect with the P mouths of the three position four-way directional control valve, and described
The oil-out of six check valves connects with outer oil-control control mouth.
9. cylinder type hydraulic system for lifting according to claim 1, it is characterised in that the A mouths of first inserted valve and
Oil inlet after the A mouths connection of second inserted valve again with the 4th check valve connects.
10. cylinder type hydraulic system for lifting according to claim 1, it is characterised in that the B mouths of first inserted valve and
Oil inlet again with first check valve connect after the A mouths connection of 3rd inserted valve, the B mouths of second inserted valve with
Oil inlet after the A mouths connection of 4th inserted valve again with second check valve connects.
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| CN201710760974.3A CN107725500B (en) | 2017-08-30 | 2017-08-30 | A kind of cylinder type hydraulic system for lifting |
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| CN201710760974.3A CN107725500B (en) | 2017-08-30 | 2017-08-30 | A kind of cylinder type hydraulic system for lifting |
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| CN107725500B (en) | 2019-08-02 |
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