CN107725500B - A kind of cylinder type hydraulic system for lifting - Google Patents
A kind of cylinder type hydraulic system for lifting Download PDFInfo
- Publication number
- CN107725500B CN107725500B CN201710760974.3A CN201710760974A CN107725500B CN 107725500 B CN107725500 B CN 107725500B CN 201710760974 A CN201710760974 A CN 201710760974A CN 107725500 B CN107725500 B CN 107725500B
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- valve
- mouth
- oil inlet
- 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
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, it include: the first check valve, second one-way valve, third check valve, 4th check valve, three position four-way directional control valve, first inserted valve, second inserted valve, third inserted valve, 4th inserted valve and even number execution module, each execution module includes lift cylinder, the oil inlet of first check valve is connected to the rodless cavity of each lift cylinder respectively, the oil inlet of second one-way valve is connected to the rod chamber of each lift cylinder respectively, the oil outlet of first check valve and the oil outlet of second one-way valve are connected to the oil inlet of third check valve, the oil outlet of third check valve is connected to the P mouth of the oil outlet of the 4th check valve and three position four-way directional control valve respectively, the oil inlet of 4th check valve is connected to the A mouth of the A of the first inserted valve mouth and the second inserted valve respectively.The cylinder type hydraulic system for lifting realizes the pressure maintaining of the rodless cavity of lift cylinder.
Description
Technical field
The present invention relates to field of hydraulic control, in particular to a kind of cylinder type hydraulic system for lifting.
Background technique
Self-elevating ocean platform applies in general to neritic province domain work, the exploitation for offshore oil.Field is used certain
Conjunction needs self-elevating ocean platform to be chronically at status of support.The lifting device used for this operating condition self-elevating ocean platform
Generally cylinder type elevating mechanism.
A kind of existing cylinder type elevating mechanism includes: rotating ring beam, determines ring beam, lift cylinder, wedge bracket and spud leg, rotating ring beam
And determine to connect between ring beam by lift cylinder, rotating ring beam and determine ring beam and be respectively sleeved on spud leg, determines 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 determined on ring beam respectively
It is provided with rotating ring beam latch assembly on insertion spud leg and determines ring beam latch assembly, inserted by the flexible and rotating ring beam of lift cylinder
Pin assemblies and the alternating plug movement for determining ring beam latch assembly, may be implemented the lifting action of self-elevating ocean platform.Existing one
The hydraulic system of kind cylinder type elevating mechanism controls lift cylinder using three position four-way directional control valve, specifically, 3-position 4-way commutation
The A mouth of valve is connected to the rod chamber of lift cylinder, and the B mouth of three position four-way directional control valve is connected to the rodless cavity of lift cylinder, and three
The T mouth of four-way reversing valve is connected to fuel tank, and the P mouth and external control oil stream of three position four-way directional control valve enter pipeline connection.
In the implementation of the present invention, the inventor finds that the existing technology has at least the following problems:
When self-elevating ocean platform is in floating state, need by between lift cylinder and three position four-way directional control valve
Loine pressure, to keep self-elevating ocean platform motionless relative to spud leg.But since three position four-way directional control valve is without close
The performance of pressure maintaining is sealed, this will lead to the loine pressure between lift cylinder and three position four-way directional control valve and gradually decreases, and make jack up
Ocean platform glides, and influences the normal work of self-elevating ocean platform.
Summary of the invention
Safety in order to solve the problems, such as self-elevating ocean platform in the prior art is low, and the embodiment of the invention provides one
Kind cylinder type hydraulic system for lifting.The technical solution is as follows:
The embodiment of the invention provides a kind of cylinder type hydraulic system for lifting, comprising: the first check valve, second one-way valve,
Third check valve, the 4th check valve, three position four-way directional control valve, the first inserted valve, the second inserted valve, third 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
It is not connected to the rodless cavity of each lift cylinder, the oil inlet of the second one-way valve has with each lift cylinder
The oil outlet of rod cavity connection, the oil outlet of first check valve and the second one-way valve with the third check valve into
Hydraulic fluid port connection, the oil outlet of the third check valve commutate with the oil outlet of the 4th check valve and the 3-position 4-way respectively
The P mouth of valve is connected to, the oil inlet of the 4th check valve respectively with the A mouth of first inserted valve and second inserted valve
A mouthfuls of connections, the A mouth of the three position four-way directional control valve X mouth with the X mouth of second inserted valve and the third inserted valve respectively
Connection, the B mouth of the three position four-way directional control valve X mouth company with the X mouth of first inserted valve and the 4th inserted valve respectively
Logical, the B mouth of first inserted valve and the A mouth of the third inserted valve are connected to the oil inlet of first check valve respectively,
The B mouth of second inserted valve and the A mouth of the 4th inserted valve are connected to the oil inlet of the second one-way valve respectively, described
The B mouth of third inserted valve and the B mouth of the 4th inserted valve are connected to fuel tank respectively.
Specifically, each execution module includes: the 5th inserted valve, pilot valve and counterbalance valve, for any one institute
Execution module is stated, the A mouth of the 5th inserted valve is connected to the oil inlet of first check valve, the B of the 5th inserted valve
It mouthful being connected to the rodless cavity of the lift cylinder, the X mouth of the 5th inserted valve is connected to the A of pilot valve mouth, and described the
The B mouth of five inserted valves is also connected to the X1 mouth of the B of pilot valve mouth and the pilot valve respectively, the C mouth of the pilot valve with
The fuel tank connection, the X2 mouth of the pilot valve are connected to the oil inlet of the third check valve, the oil inlet of the counterbalance valve
It is connected to the B mouth of the 4th inserted valve, the oil outlet of the counterbalance valve is connected to the fuel tank.
Further, each execution module includes: safety valve, for execution module described in any one, the peace
The oil inlet of full valve is connected to the rodless cavity of the lift cylinder, and the oil outlet of the safety valve is connected to the fuel tank.
Further, after the oil outlet of the safety valve is connected to the oil inlet of the 5th check valve again with the fuel tank
Connection.
Further, the cylinder type hydraulic system for lifting further include: the 5th check valve, the oil inlet of the 5th check valve
Mouth is connected to the oil outlet of the safety valve, and the oil outlet of the 5th check valve is connected to the rod chamber of the lift cylinder.
Further, each execution module includes: throttle valve, for execution module described in any one, the section
First hydraulic fluid port of stream valve is connected to the X2 of pilot valve mouth, the second hydraulic fluid port of the throttle valve and the third check valve into
Hydraulic fluid port connection.
Further, for execution module described in any one, the B mouth of the pilot valve is connected to the X1 of pilot valve mouth
It is connected to again with the B mouth of the 5th inserted valve afterwards.
Specifically, the cylinder type hydraulic system for lifting further include: the 6th check valve, the oil outlet of the 6th check valve
It is connected to the P of three position four-way directional control valve mouth, the oil inlet of the 6th check valve is connected to outer oil-control control mouth.
Specifically, unidirectional with the described 4th again after the connection of the A mouth of the A mouth of first inserted valve and second inserted valve
The oil inlet of valve is connected to.
Specifically, unidirectional with described first again after the connection of the A mouth of the B mouth of first inserted valve and the third inserted valve
The oil inlet of valve is connected to, unidirectional with described second again after the A mouth connection of the B mouth and the 4th inserted valve of second inserted valve
The oil inlet of valve is connected to.
Technical solution provided in an embodiment of the present invention has the benefit that when the rodless cavity of lift cylinder needs pressure maintaining
When, the P mouth of three position four-way directional control valve is connected to third check valve and the 4th check valve respectively, and the P mouth of three position four-way directional control valve is logical
It crosses and compares the pressure from oil circuit where third check valve and the 4th check valve, so that the highest oil circuit of pressure be selected to flow into three
The P mouth of four-way reversing valve, however third check valve is connected to the first check valve and second one-way valve, then, third check valve is logical
It crosses and compares the pressure from oil circuit where the first check valve and second one-way valve, so that the highest oil circuit of pressure be selected to flow into third
Check valve, this oil liquid for flowing into the P mouth of three position four-way directional control valve be by comparing from lift cylinder rodless cavity, have bar
After the pressure of the A of chamber and the first inserted valve mouth, wherein the highest oil liquid of pressure is flowed into the P mouth of three position four-way directional control valve for selection,
The A mouth of three position four-way directional control valve is connected to the X mouth of the X of the second inserted valve mouth and third inserted valve respectively, three position four-way directional control valve
B mouth be connected to respectively with the X mouth of the X of the first inserted valve mouth and the 4th inserted valve, this make the X mouth of the first inserting, second inserting
The pressure of the X mouth of the X mouth of valve, the X mouth of third inserted valve and the 4th inserted valve be in entire cylinder type hydraulic system for lifting most
High oil liquid pressure, and the oil effect area at the X mouth of four inserted valves is greater than the oil liquid effect of the A mouth of four inserted valves,
When this is connected to the X mouth of four inserted valves with fuel tank, being in four inserted valves can not be in the pressure of the A mouth of the first inserted valve
It is opened under power, to realize the pressure maintaining of the rodless cavity of lift cylinder, and then keeps self-elevating ocean platform relative to stake
Leg is motionless.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached 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.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Embodiment
The embodiment of the invention provides a kind of cylinder type hydraulic system for lifting, which is suitable for 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 by taking single lift cylinder as an example below, which includes: the first check valve
1, second one-way valve 2, third 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
7, third inserted valve 8, the 4th inserted valve 9 and even number execution module, each execution module include lift cylinder a.First is single
Be connected to respectively with the rodless cavity a1 of each lift cylinder a to the oil inlet of valve 1, the oil inlet of second one-way valve 2 respectively with it is each
The rod chamber a2 of lift cylinder a is connected to, and the oil outlet of the first check valve 1 and the oil outlet of second one-way valve 2 are unidirectional with third
The oil inlet of valve 3 is connected to, the oil outlet of third check valve 3 respectively with the oil outlet and three position four-way directional control valve 5 of the 4th check valve 4
The connection of P mouth, the oil inlet of the 4th check valve 4 is connected to the A mouth of the A mouth of the first inserted valve 6 and the second inserted valve 7 respectively, three
The A mouth of position and four-way reversing valve 5 is connected to the X mouth of the X mouth of the second inserted valve 7 and third inserted valve 8 respectively, three position four-way directional control valve
5 B mouth is connected to the X mouth of the X mouth of the first inserted valve 6 and the 4th inserted valve 9 respectively, and the B mouth and third of the first inserted valve 6 insert
The A mouth of valve 8 is connected to the oil inlet of the first check valve 1 respectively, the B mouth of the second inserted valve 7 and the A mouth difference of the 4th inserted valve 9
It is connected to the oil inlet of second one-way valve 2, the B mouth of third inserted valve 8 and the B mouth of the 4th inserted valve 9 are connected to fuel tank b respectively.
Specifically, each execution module includes: the 5th inserted valve 10, pilot valve 11 and counterbalance valve 15, for any one
The A mouth of execution module, the 5th inserted valve 10 is connected to the oil inlet of the first check valve 1, the B mouth and promotion oil of the 5th inserted valve 10
The rodless cavity a1 of cylinder a is connected to, and the X mouth of the 5th inserted valve 10 is connected to the A of pilot valve 11 mouth, and the B mouth of the 5th inserted valve 10 also divides
It is not connected to the X1 mouth of the B of pilot valve 11 mouth and pilot valve 11, the C mouth of pilot valve 11 is connected to fuel tank b, the X2 mouth of pilot valve 11
It is connected to the oil inlet of third check valve 3, the oil inlet of counterbalance valve 15 is inserted with the B mouth of the 4th inserted valve 9 and the third respectively
The B mouth connection of valve 8 is filled, the oil outlet of counterbalance valve 15 is connected to fuel tank b.When self-elevating ocean platform is in decline operating condition, three
The electromagnet of 5 left position of position and four-way reversing valve obtains electric, and the P mouth of three position four-way directional control valve 5 is connected to the A of three position four-way directional control valve 5 mouth,
Main system pressure oil P1 hydraulic fluid port passes through the A mouth of the second inserted valve 7, flows through B mouth the having into lift cylinder a of the second inserted valve 7
In rod cavity a2, by the pressure of the first check valve 1 and second one-way valve 2 relatively after, select the high oil circuit oil liquid of pressure in the two
It flow at the X2 mouth of pilot valve 11, the right position of pilot valve 11 is made to work, at this time the C mouth company of the A mouth of pilot valve 11 and pilot valve 11
Logical, the C mouth of pilot valve 11 is connected to fuel tank b, so that the X mouth of the 5th inserted valve 10 is connected to fuel tank b, to make the 5th inserted valve
10 open, the rodless cavity a1 oil return of lift cylinder a, and oil liquid flows through counterbalance valve 15 by third inserted valve 8 and enters oil return box b, back pressure
The pressure of valve 15 is to balance the pressure of the load of self-elevating ocean platform, and counterbalance valve 15 is in the open state, oil liquid gram at this time
Take the pressure current oil return box b of counterbalance valve 15.When self-elevating ocean platform declines operating condition, the rodless cavity a1 of lift cylinder a is used for
The load for keeping self-elevating ocean platform, since the load is larger, so that the pipeline being connected to the rodless cavity a1 of lift cylinder a holds
Booster easily occurs, when booster occurs for the pipeline, which is in decompression state, and rodless cavity a1 cannot bear any load, have
The input pressure of rod cavity a2 is also reduced rapidly to zero, the oil that the X2 mouth of pilot valve 11 is introduced from rodless cavity a1 and rod chamber a2 at this time
Hydraulic coupling is also zero, and pilot valve 11 is in left position always, and the 5th inserted valve 10 is in close state, lift cylinder a attonity, from
Lift-type ocean platform is in hold mode.It can be avoided the state that self-elevating ocean platform is in stall decline in this way, to mention
The high safety 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 be connected to the rodless cavity a1 of lift cylinder a, the oil outlet of safety valve 12 is connected to fuel tank b.When with lift cylinder a's
When oil liquid pressure in the pipeline of rodless cavity a1 connection is increased more than specified value, safety valve 12 is opened, and part oil liquid is made to flow to oil
Case b, to avoid the pipeline being connected to the rodless cavity a1 of lift cylinder a that booster occurs because of high pressure.
Further, which can also include: the 5th check valve 13, the 5th check valve 13 into
Hydraulic fluid port is connected to the oil outlet of safety valve 12, and the oil outlet of the 5th check valve 13 is connected to the rod chamber a2 of lift cylinder a.5th
Check valve 13 can be introduced oil liquid in the rod chamber a2 of lift cylinder a by the oil liquid that safety valve 12 flows out, to improve oil
The utilization efficiency of liquid.
Further, for any one execution module, the oil inlet company of the oil outlet of safety valve 12 and the 5th check valve 13
It is connected to again with fuel tank b after logical.Oil circuit can be simplified in this way, to reduce the volume of cylinder type hydraulic system for lifting.
Further, each execution module may each comprise: throttle valve 14, for any one execution module, throttle valve 14
The first hydraulic fluid port be connected to the X2 of pilot valve 11 mouth, the second hydraulic fluid port of throttle valve 14 is connected to the oil inlet of third check valve 3.Section
Stream valve 14 is used to control the oil pressure pressure at the X2 mouth for flowing into pilot valve 11.
Further, for any one execution module, again with the after the X1 mouth connection of the B mouth and pilot valve 11 of pilot valve 11
The B mouth of five inserted valves 10 is connected to.Oil circuit can be simplified in this way, to reduce the volume of cylinder type hydraulic system for lifting.
Specifically, which can also include: the 6th check valve 16, the oil inlet of the 6th check valve 16
Mouth is connected to the P of three position four-way directional control valve 5 mouth, and the oil outlet of the 6th check valve 16 controls P3 mouthfuls with outer oil-control and is connected to.Pass through
Six check valves 16 introduce outer oil-control to the P mouth of three position four-way directional control valve 5, and P mouth of three position four-way directional control valve 5 is by comparing coming from the
The pressure of three check valves 3,16 place oil circuit of the 4th check valve 4 and the 6th check valve, so that the highest oil circuit of pressure be selected to flow into
The P mouth of three position four-way directional control valve 5, introducing outer oil-control to the P mouth 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 that the pressure for guaranteeing to flow into the P mouth of three position four-way directional control valve 5 is higher, into
The sealing performance of the first inserted valve 6, the second inserted valve 7, third inserted valve 8 and the 4th inserted valve 9 is effectively ensured in one step.
Specifically, the oil inlet with the 4th check valve 4 again after the connection of the A mouth of the A mouth of the first inserted valve 6 and the second inserted valve 7
Mouth connection.Oil circuit can be simplified in this way, to reduce the volume of cylinder type hydraulic system for lifting.
Specifically, the oil inlet with the first check valve 1 again after the connection of the A mouth of the B mouth of the first inserted valve 6 and third inserted valve 8
Mouth connection.Oil circuit can be simplified in this way, to reduce the volume of cylinder type hydraulic system for lifting.
Specifically, the oil inlet with second one-way valve 2 again after the connection of the A mouth of the B mouth of the second inserted valve 7 and the 4th inserted valve 9
Mouth connection.Oil circuit can be simplified in this way, to reduce the volume of cylinder type hydraulic system for lifting.
The cylinder type hydraulic system for lifting is in actual work, and in order to guarantee to go up and down, execution module corresponds to even number arrangement,
When execution module is two, hydraulic schematic diagram is shown in Fig. 2.
It following is a brief introduction of the working principle of cylinder type hydraulic system for lifting provided in an embodiment of the present invention, specifically such as
Under:
When self-elevating ocean platform is in floating state, three position four-way directional control valve is middle position, the rodless cavity of lift cylinder a
Oil liquid in a1 needs pressure maintaining, at this point, the P mouth of three position four-way directional control valve 5 connects with third check valve 3 and the 4th check valve 4 respectively
It is logical, P mouth of three position four-way directional control valve 5 pressure from 4 place oil circuit of third check valve 3 and the 4th check valve by comparing, from
And the highest oil circuit of pressure is selected to flow into the P mouth of three position four-way directional control valve 5, however third check valve 3 and the first check valve 1 and the
The connection of two check valves 2, then, third check valve 3 is by comparing from 2 place oil circuit of the first check valve 1 and second one-way valve
Pressure, so that the highest oil circuit of pressure be selected to flow into third check valve 3, this flows into the oil of the P mouth of three position four-way directional control valve 5
Liquid be by comparing rodless cavity a1, rod chamber a2 and the first inserted valve 6 from lift cylinder a A mouth pressure after, select it
The middle highest oil liquid of pressure flows into the P mouth of three position four-way directional control valve 5, and the A mouth of three position four-way directional control valve 5 is inserted with second respectively
The X mouth of valve 7 is connected to the X of third inserted valve 8 mouth, the B mouth of three position four-way directional control valve 5 respectively with the X mouth of the first inserted valve 6 and
The X mouths of four inserted valves 9 is connected to, this make the X mouth of the first inserted valve 6, the X mouth of the second inserted valve 7, third inserted valve 8 X mouth and
The pressure of the X mouth of 4th inserted valve 9 is highest oil liquid pressure in entire cylinder type hydraulic system for lifting, and four inserted valves
The oil liquid that the oil effect area at X mouthfuls is greater than A mouth of four inserted valves acts on, this make the X mouths of four inserted valves not with oil
It is that can not be opened under the pressure of the A mouth of the first inserted valve in four inserted valves when case b is connected to.
When the electromagnet on 5 the right of three position four-way directional control valve obtains electric, oil liquid flow to three by the P mouth of three position four-way directional control valve 5
After the B mouth of position and four-way reversing valve 5, then it flow to the X mouth of the first inserted valve 6 and the X mouth of the 4th inserted valve 9, the first inserted valve 6 respectively
It is closed with the 4th inserted valve 9, the second inserted valve 7 and third inserted valve 8 are connected to the B of three position four-way directional control valve 5 mouth, so that the
Two inserted valves 7 and third inserted valve 8 are opened, and the oil liquid that P1 mouthfuls of oil inlet is flow to the B of the second inserted valve 7 by the A mouth of the second inserted valve 7
It after mouthful, flows into the rod chamber a2 of lift cylinder a, realizes the retraction of lift cylinder a.
When the electromagnet on 5 left side of three position four-way directional control valve obtains electric, oil liquid flow to three by the P mouth of three position four-way directional control valve 5
After the A mouth of position and four-way reversing valve 5, then it flow to the X mouth of the second inserted valve 7 and the X mouth of third inserted valve 8, the second inserted valve 7 respectively
It is closed with third inserted valve 8, the first inserted valve 6 and the 4th inserted valve 9 are connected to the B of three position four-way directional control valve 5 mouth, so that the
One inserted valve 6 and the 4th inserted valve 9 are opened, and after oil liquid flow to the B mouth of the first inserted valve 6 by the A mouth of the first inserted valve 6, are flowed into
In the rodless cavity a1 of lift cylinder a, the stretching of lift cylinder a is realized.
The embodiment of the invention provides a kind of cylinder type hydraulic system for lifting, when the rodless cavity of lift cylinder needs pressure maintaining
When, the P mouth of three position four-way directional control valve is connected to third check valve and the 4th check valve respectively, and the P mouth of three position four-way directional control valve is logical
It crosses and compares the pressure from oil circuit where third check valve and the 4th check valve, so that the highest oil circuit of pressure be selected to flow into three
The P mouth of four-way reversing valve, however third check valve is connected to the first check valve and second one-way valve, then, third check valve is logical
It crosses and compares the pressure from oil circuit where the first check valve and second one-way valve, so that the highest oil circuit of pressure be selected to flow into third
Check valve, this oil liquid for flowing into the P mouth of three position four-way directional control valve be by comparing from lift cylinder rodless cavity, have bar
After the pressure of the A of chamber and the first inserted valve mouth, wherein the highest oil liquid of pressure is flowed into the P mouth of three position four-way directional control valve for selection,
The A mouth of three position four-way directional control valve is connected to the X mouth of the X of the second inserted valve mouth and third inserted valve respectively, three position four-way directional control valve
B mouth be connected to respectively with the X mouth of the X of the first inserted valve mouth and the 4th inserted valve, this make the X mouth of the first inserting, second inserting
The pressure of the X mouth of the X mouth of valve, the X mouth of third inserted valve and the 4th inserted valve be in entire cylinder type hydraulic system for lifting most
High oil liquid pressure, and the oil effect area at the X mouth of four inserted valves is greater than the oil liquid effect of the A mouth of four inserted valves,
When this is connected to the X mouth of four inserted valves with fuel tank, being in four inserted valves can not be in the pressure of the A mouth of the first inserted valve
It is opened under power, to realize the pressure maintaining of the rodless cavity of lift cylinder, and then keeps self-elevating ocean platform relative to stake
Leg is motionless.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of cylinder type hydraulic system for lifting, which is characterized in that the cylinder type hydraulic system for lifting includes: first unidirectional
Valve, second one-way valve, third check valve, the 4th check valve, three position four-way directional control valve, the first inserted valve, the second inserted valve, third
Inserted valve, the 4th inserted valve and even number execution module, each execution module includes lift cylinder, and described first is unidirectional
The oil inlet of valve is connected to the rodless cavity of each lift cylinder respectively, the oil inlet of the second one-way valve respectively with it is each
The rod chamber of the lift cylinder is connected to, and the oil outlet of the oil outlet of first check valve and the second one-way valve is and institute
State third check valve oil inlet connection, the oil outlet of the third check valve respectively with the oil outlet of the 4th check valve and
The P mouth of the three position four-way directional control valve is connected to, the oil inlet of the 4th check valve respectively with the A mouth of first inserted valve and
The A mouth of second inserted valve is connected to, the A mouth of the three position four-way directional control valve respectively with the X mouth of second inserted valve and institute
State the X mouth connection of third inserted valve, the B mouth of the three position four-way directional control valve respectively with the X mouth of first inserted valve and described
The X mouth of 4th inserted valve is connected to, and the B mouth of first inserted valve and the A mouth of the third inserted valve are single with described first respectively
Be connected to the oil inlet of valve, the A mouth of the B mouth of second inserted valve and the 4th inserted valve respectively with the second one-way valve
Oil inlet connection, the B mouth of the third inserted valve and the B mouth of the 4th inserted valve are connected to fuel tank respectively.
2. cylinder type hydraulic system for lifting according to claim 1, which is characterized in that each execution module is wrapped
Include: the 5th inserted valve, pilot valve and counterbalance valve, for execution module described in any one, the A mouth of the 5th inserted valve with it is described
The oil inlet of first check valve is connected to, and the B mouth of the 5th inserted valve is connected to the rodless cavity of the lift cylinder, and the described 5th
The X mouth of inserted valve is connected to the A of pilot valve mouth, the B mouth of the 5th inserted valve also respectively with the B of pilot valve mouth and
The X1 mouth of the pilot valve is connected to, and the C mouth of the pilot valve is connected to the fuel tank, the X2 mouth of the pilot valve and the third
The oil inlet of check valve is connected to, and the oil inlet of the counterbalance valve is connected to the B mouth of the 4th inserted valve, and the counterbalance valve goes out
Hydraulic fluid port is connected to the fuel tank.
3. cylinder type hydraulic system for lifting according to claim 2, which is characterized in that each execution module is wrapped
Include: safety valve, for execution module described in any one, the rodless cavity of the oil inlet of the safety valve and the lift cylinder connects
Logical, the oil outlet of the safety valve is connected to the fuel tank.
4. cylinder type hydraulic system for lifting according to claim 3, which is characterized in that the cylinder type hydraulic system for lifting
Further include: the oil inlet of the 5th check valve, the 5th check valve is connected to the oil outlet of the safety valve, and the described 5th is unidirectional
The oil outlet of valve is connected to the rod chamber of the lift cylinder.
5. cylinder type hydraulic system for lifting according to claim 4, which is characterized in that the oil outlet of the safety valve and institute
It is connected to again with the fuel tank after stating the oil inlet connection of the 5th check valve.
6. cylinder type hydraulic system for lifting according to claim 2, which is characterized in that each execution module is wrapped
Include: throttle valve, for execution module described in any one, the first hydraulic fluid port of the throttle valve is connected to the X2 of pilot valve mouth,
Second hydraulic fluid port of the throttle valve is connected to the oil inlet of the third check valve.
7. cylinder type hydraulic system for lifting according to claim 2, which is characterized in that for execution mould described in any one
Block is connected to the B mouth of the 5th inserted valve again after the X1 mouth connection of the B mouth and the pilot valve of the pilot valve.
8. cylinder type hydraulic system for lifting according to claim 1, which is characterized in that the cylinder type hydraulic system for lifting
Further include: the oil outlet of the 6th check valve, the 6th check valve is connected to the P of three position four-way directional control valve mouth, and described
The oil inlet of six check valves is connected to outer oil-control control mouth.
9. cylinder type hydraulic system for lifting according to claim 1, which is characterized in that the A mouth of first inserted valve and
It is connected to again with the oil inlet of the 4th check valve after the A mouth connection of second inserted valve.
10. cylinder type hydraulic system for lifting according to claim 1, which is characterized in that the B mouth of first inserted valve and
The third inserted valve A mouth connection after be connected to again with the oil inlet of first check valve, the B mouth of second inserted valve with
It is connected to again with the oil inlet of the second one-way valve after the A mouth connection of 4th inserted valve.
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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 true CN107725500B (en) | 2019-08-02 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109973449B (en) * | 2019-03-01 | 2020-07-21 | 武汉船用机械有限责任公司 | Hydraulic control system of lifting platform |
| CN109931314A (en) * | 2019-03-22 | 2019-06-25 | 中国铁建重工集团有限公司 | Hydraulic system |
| CN110219842B (en) * | 2019-04-30 | 2020-11-10 | 武汉船用机械有限责任公司 | Hydraulic system of lifting platform |
| CN111022394A (en) * | 2019-11-19 | 2020-04-17 | 一汽解放汽车有限公司 | Hydraulic integrated system |
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