CN109281874A - A kind of the major loop Load Relief System and pile press machine of guide's hydraulic control - Google Patents
A kind of the major loop Load Relief System and pile press machine of guide's hydraulic control Download PDFInfo
- Publication number
- CN109281874A CN109281874A CN201811483152.6A CN201811483152A CN109281874A CN 109281874 A CN109281874 A CN 109281874A CN 201811483152 A CN201811483152 A CN 201811483152A CN 109281874 A CN109281874 A CN 109281874A
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- Prior art keywords
- valve
- oil
- control
- pilot
- pilot valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/022—Installations or systems with accumulators used as an emergency power source, e.g. in case of pump failure
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/20—Placing by pressure or pulling power
-
- 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
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/024—Pressure relief valves
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
- F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators
Abstract
The present invention provides a kind of major loop Load Relief System of guide's hydraulic control and pile press machines, including oil cylinder (3), main valve (1), pilot valve (2), oil pump (5) and accumulator (6), the outlet of oil pump is connected with driving oil circuit (8) and control oil circuit (9), the oil inlet of oil circuit and main valve is driven to connect, the oil inlet for controlling oil circuit and pilot valve connects, and the charge and discharge energy mouth of the accumulator is connected on control oil circuit.The present invention on the hydraulic main circuit of engineering machinery by being arranged accumulator, when oil pump stops, it is released energy by accumulator and drives main valve, the oil pressure retained in system pipeline can will be made to let out in time when oil pump stops working to remove, security performance when pipeline disassembly is effectively guaranteed, it is very suitable to shift the engineering machinery in place after needing to dismantle, is particularly suitable for pile press machine.
Description
Technical field
The present invention relates to large-scale engineering machinery field, the major loop Load Relief System and pressure of especially a kind of guide's hydraulic control
Stake machine.
Background technique
It is handed over currently, the engineering machinery of the large size such as hydraulic static pile pressing machine is such as widely used in Urban Bridge, building, road
In the fields such as logical construction, the hydraulic system of great tonnage hydraulic static pile press (abbreviation pile press machine in the application) is during the work time
Flow it is very big, commonly reach 400L/min or more, main valve needs very big strength, institute using common manual operation reversal valve
With generally using manual pilot valve come control bound, the relatively common hydraulic system such as Fig. 1, main valve 1 uses pilot operated directional control valve,
The hydraulic control signal of main valve is controlled by pilot valve 2, and due to the needs of operating condition, main valve must be middle position O shape function, keeps each oil circuit
Not connected closed state, to guarantee the pressure holding effect for having certain in work progress.
And the pile press machine weight of large-tonnage is up to 200 tons or more, and volume is also larger, the width after general expansion is at 10 meters
More than, pile press machine is needed to dismantle in machine and is dispensed during converting building site, in order to transport, the oil cylinder 3 of pile press machine because
Height is more than shipping height, needs to remove independent transport, other than after a shutdown removing structural member, fluid pressure line is also wanted
It dismantles together, general position of dismantling is the connector 4 (referring to Fig. 1) being arranged at rod chamber and rodless cavity oil inlet and outlet, due to stopping
Main valve is located at middle position after machine, and there are high pressure oil in oil pipe, pressure release of having no idea, during disconnecting head, high pressure oil can spray
Out, great hidden danger is constituted to the safety of operator.Therefore, a kind of scheme is needed to ask to solve this in the prior art
Topic.
Summary of the invention
It is an object of that present invention to provide a kind of major loop Load Relief System of guide's hydraulic control and pile press machines, to solve background
The problem of being proposed in technology.
A kind of major loop Load Relief System of guide's hydraulic control, including oil cylinder 3, main valve 1, pilot valve 2, oil pump 5 and accumulation of energy
Device 6, the main valve are pilot operated directional control valve, and the pilot valve is reversal valve, and two pilot control hydraulic fluid ports of main valve are separately connected institute
Two actuator ports of pilot valve are stated, the rod chamber of oil cylinder passes through two working oils that connector connect main valve with rodless cavity respectively
Mouthful, the oil return opening of main valve and pilot valve is connect with fuel tank 7, and the entrance of the oil pump is connect with fuel tank, the outlet connection of oil pump
There are driving oil circuit 8 and control oil circuit 9, the oil inlet of oil circuit and main valve is driven to connect, the oil inlet for controlling oil circuit and pilot valve connects
It connects, the charge and discharge energy mouth of the accumulator is connected on control oil circuit, and accumulator is used for after oil pump shutdown, by pilot valve to master
Valve provides pilot control pressure and drives main valve events, to make pipeline pressure release, guarantees the safety of disassembly.Oil pump stops working
Afterwards, when by main valve events to make pipeline pressure release, the hydraulic oil in pipeline flows back to fuel tank from the oil return opening of main valve.
Further, it controls on oil circuit and is provided with pressure reducing valve 10, pressure reducing valve is located at accumulator upstream, pressure reducing valve forward flow
Direction is the direction that pilot valve and accumulator are flowed to by oil pump, and the hydraulic oil of oil pump outflow flows into accumulator again after pressure reducing valve
And/or pilot valve, pressure reducing valve is using oil outlet pressure as control pressure.
Further, the charge and discharge energy mouth of the accumulator is divided into L and two branches of M are connected on control oil circuit 9, branch L
On be provided with check valve 1, branch M is directly connected on control oil circuit, and wherein branch L is located at the tie point for controlling oil circuit
The upstream of the tie point of branch M and control oil circuit, controls and is provided with check valve 2 12 on oil circuit, and the position of check valve two is located at branch
Between road L and branch M, the positive circulating direction of check valve one and check valve two is the direction far from oil pump, check valve one with
Check valve two is used to prevent energy storage pressure oil toward the pipeline leakage close to oil pump direction when accumulator releases energy, to guarantee
Enough pressure oil is for driving main valve.
Further, the outlet of the oil pump is connected with the overflow valve 13 with control mouth k, and the oil inlet of overflow valve connects oil
The oil outlet of pump discharge, overflow valve connects fuel tank, and control mouth k and the e of the pilot valve mouth of overflow valve communicate, the e mouth of pilot valve
Connection status are as follows: communicated with fuel tank for e mouthfuls and control mouth K when pilot valve attonity, overflow valve is in unloading condition, and pilot valve has
When making, e mouthfuls of cut-offs, overflow valve is in normal operating conditions, plays normal overflow valve, system worked well.
Preferably, the pilot valve is three six-way transfer valves, and middle position, pilot valve attonity are located at when the valve attonity
When positioned at middle position, e mouthfuls communicate with fuel tank, when pilot valve has movement to leave middle position, e mouthfuls of cut-offs.
A kind of pile press machine, the major loop Load Relief System including guide's hydraulic control, the epicoele of oil cylinder are rodless cavity, oil
The cavity of resorption of cylinder is rod chamber, is provided with connector 4 on the pipeline at cylinder upper cavity oil and cavity of resorption oil inlet and outlet, the cavity of resorption of oil cylinder is connected with
Shut-off valve 14, shut-off valve on the pipeline between oil cylinder cavity of resorption oil inlet and outlet and connector, open in operation of oil pump by shut-off valve,
Shut-off valve is closed before oil cylinder disassembly, oil pressure when reducing disassembly in pipeline.
The present invention at least has the advantages that
The present invention, when oil pump stops, passing through accumulator by the way that accumulator is arranged on the hydraulic main circuit of engineering machinery
It releases energy and drives main valve, the oil pressure retained in system pipeline can will be made to let out in time when oil pump stops working and removed, it is effective to protect
Security performance when pipeline disassembly has been demonstrate,proved, has been very suitable to shift the large-scale engineering machinery in place after needing to dismantle, be particularly suitable for
Pile press machine.
Other than objects, features and advantages described above, there are also other objects, features and advantages by the present invention.
Below with reference to figure, the present invention is described in further detail.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is existing piling machine hydraulic system major loop schematic diagram；
Fig. 2 is the hydraulic static pile pressing machine major loop Load Relief System schematic diagram of the preferred embodiment of the present invention.
In figure: 1- main valve, 2- pilot valve, 3- oil cylinder, 4- connector, 5- oil pump, 6- accumulator, 7- fuel tank, 8- drive oil circuit,
9- controls oil circuit, 10- pressure reducing valve, 11- check valve one, 12- check valve two, 13- overflow valve, 14- shut-off valve.
Specific embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention can be limited according to claim
Fixed and covering multitude of different ways is implemented.
A kind of static pile press major loop Load Relief System of guide's hydraulic control referring to fig. 2, including oil cylinder 3, main valve 1,
Pilot valve 2, oil pump 5 and accumulator 6, in the present embodiment, main valve is pilot operated directional control valve, and pilot valve is hand-operated direction valve, main valve
Two pilot control hydraulic fluid ports are separately connected the actuator port c and actuator port d of the pilot valve, the rod chamber and rodless cavity of oil cylinder
The actuator port a and actuator port b of main valve are connected by connector respectively, the oil return opening of main valve and pilot valve is connect with fuel tank 7,
The entrance of the oil pump is connect with fuel tank, and the outlet of oil pump is connected with driving oil circuit 8 and control oil circuit 9, drives oil circuit and main valve
Oil inlet connection, the oil inlet for controlling oil circuit and pilot valve connects, and the charge and discharge energy mouth of the accumulator is connected to control oil circuit
On, accumulator is used for after oil pump shutdown, and pilot control pressure, which is provided, to main valve by pilot valve drives main valve events, thus
Make oil cylinder and pipeline pressure release, guarantees the safety of disassembly.After oil pump stops working, make pipeline pressure release by main valve events
When, the hydraulic oil in pipeline flows back to fuel tank from the oil return opening of main valve.
In the present embodiment, controls and be provided with pressure reducing valve 10 on oil circuit, pressure reducing valve is located at accumulator upstream, pressure reducing valve forward stream
Dynamic direction is the direction that pilot valve and accumulator are flowed to by oil pump, and the control port of pressure reducing valve is connected on control oil circuit 9, decompression
Valve is used to control the oil pressure into accumulator and pilot valve, to prevent the oil pressure for entering accumulator and pilot valve excessive.
In the present embodiment, the charge and discharge energy mouth of accumulator is divided into L and two branches of M are connected on control oil circuit 9, on branch L
It is provided with check valve 1, branch M is directly connected on control oil circuit, is controlled and is provided with check valve 2 12, check valve on oil circuit
Between branch L and branch M, the positive circulating direction of check valve one and check valve two is the side far from oil pump for two position
To.
In the present embodiment, the outlet of oil pump is connected with the overflow valve 13 with control mouth k, and the oil inlet of overflow valve connects oil pump
The oil outlet of outlet, overflow valve connects fuel tank, and control mouth k and the e of the pilot valve mouth of overflow valve communicate, the company of the e mouth of pilot valve
Connect state are as follows: communicate with fuel tank for e mouthfuls and control mouth K when pilot valve oil inlet attonity, overflow valve is in unloading condition, pilot valve
When having movement, e mouthfuls of cut-offs, overflow valve is in normal operating conditions, plays normal overflow valve, system worked well.
In the present embodiment, pilot valve is three six-way transfer valves, is located at middle position when pilot valve is without operation, during pilot valve is located at
When position, e mouthfuls and control mouth K communicate with fuel tank, and the oil outlet output pressure of overflow valve increases with the reduction of control mouth k pressure,
When control mouth k and fuel tank are connected, the oil outlet output pressure of overflow valve is maximum, and overflow valve is for allowing when oil pump stops working
System is in light condition, plays pressure release effect.When pilot valve leaves middle position, e mouthfuls of cut-offs, control mouth K does not work, and overflow valve rises just
Normal safe valve action.
In the present embodiment, the epicoele of oil cylinder is rodless cavity, and the cavity of resorption of oil cylinder is rod chamber, cylinder upper cavity oil and cavity of resorption disengaging oil
Be provided on pipeline at mouthful can the flexible company of tearing open connector 4, the cavity of resorption of oil cylinder is connected with shut-off valve 14, and shut-off valve is located under oil cylinder
On pipeline between chamber oil inlet and outlet and connector, shut-off valve is opened in operation of oil pump, and shut-off valve is closed before oil cylinder disassembly,
Prevent cylinder piston rod from stretching out.
The course of work and principle of the present embodiment approximately as:
When operation of oil pump, the oil of manual switching pilot valve to left position or right position, control oil circuit 9 divides after the outflow of pressure reducing valve 10
Two-way flows into accumulator 6 through the check valve 1 on branch L all the way, and accumulator 6 stores energy, and another way is through check valve 2 12
Flow to pilot valve 2, left position or right bit stream through pilot valve 2 enter the pilot control hydraulic fluid port of main valve, driving main valve 1 be transformed to right position or
The oil of left position, driving oil circuit 8 enters the cavity of resorption or epicoele of oil cylinder 3 through the right position of main valve 1 or left position, makes cylinder movement.
When needing the Median Function using main valve, manual switching pilot valve Hui Zhongwei simultaneously closes off oil pump, at this time main valve
Pilot control hydraulic fluid port oil circuit oil return box, main valve Hui Zhongwei are connected to oil return.
When needing to dismantle oil cylinder, shut-off valve 14 is first closed, pilot valve is switched into left position by middle position manually, then by left position
Right position is switched to, right position first can also be switched to by middle position, then left position is switched to by right position, it is repeated multiple times, when pilot valve is located at a left side
When position or right position, the pilot control hydraulic fluid port of main valve is connected to accumulator charge and discharge energy mouth, and the pressure oil of accumulator release is flowed through branch M
To pilot valve, enter main valve pilot control hydraulic fluid port through pilot valve left position or right bit stream, main valve obtains commutation power, switched to by middle position
Fuel tank is flowed back in right position or left position, the pressure oil part in pipeline, and the off-load of system is completed in oil pressure pressure release in pipeline, can be to pipe
Road and connector 4 are dismantled.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of major loop Load Relief System of guide's hydraulic control, which is characterized in that including oil cylinder (3), main valve (1), pilot valve
(2), oil pump (5) and accumulator (6), the main valve are pilot operated directional control valve, and the pilot valve is reversal valve, two guides of main valve
Control port is separately connected two actuator ports of the pilot valve, and the rod chamber of oil cylinder passes through connector with rodless cavity respectively and connect
The oil return opening of two actuator ports of main valve, main valve and pilot valve is connect with fuel tank (7), and the outlet of oil pump is connected with driving oil
Road (8) and control oil circuit (9) drive the oil inlet of oil circuit and main valve to connect, and the oil inlet for controlling oil circuit and pilot valve connects, institute
The charge and discharge energy mouth for stating accumulator is connected on control oil circuit, and accumulator is used for after oil pump shutdown, is mentioned by pilot valve to main valve
Main valve events are driven for pilot control pressure, to make pipeline pressure release.
2. a kind of major loop Load Relief System of guide's hydraulic control according to claim 1, which is characterized in that control oil circuit
On be provided with pressure reducing valve (10), pressure reducing valve is located at accumulator upstream, and pressure reducing valve forward flow direction is to flow to pilot valve by oil pump
And the direction of accumulator, pressure reducing valve is using oil outlet pressure as control pressure.
3. a kind of major loop Load Relief System of guide's hydraulic control according to claim 1, which is characterized in that the accumulation of energy
The charge and discharge energy mouth of device is divided into L and two branches of M are connected on control oil circuit, and wherein branch L and the tie point of control oil circuit are located at
The upstream of the tie point of branch M and control oil circuit, check valve one (11) is provided on branch L, and branch M is directly connected to control oil
On the road, it controls on oil circuit and is provided with check valve two (12), the position of check valve two is between branch L and branch M, check valve one
Positive circulating direction with check valve two is the direction far from oil pump.
4. a kind of major loop Load Relief System of guide's hydraulic control according to claim 1, which is characterized in that the oil pump
Outlet be connected with the overflow valve (13) with control mouth k, the oil inlet of overflow valve connects fuel pump outlet, and the oil outlet of overflow valve connects
Control mouth k and the e of the pilot valve mouth of connected tank, overflow valve communicate, the connection status of the e mouth of pilot valve are as follows: pilot valve attonity
When, e mouthfuls and control mouth K communicate with fuel tank, and overflow valve is in unloading condition, and when pilot valve has movement, e mouthfuls are ended, at overflow valve
In normal operating conditions.
5. a kind of major loop Load Relief System of guide's hydraulic control according to claim 4, which is characterized in that the guide
Valve is three six-way transfer valves, is located at middle position when the pilot valve is without operation, and when pilot valve is located at middle position, e mouthfuls communicate with fuel tank,
When pilot valve operates off middle position, e mouthfuls of cut-offs.
6. a kind of major loop Load Relief System of guide's hydraulic control, feature described according to claim 1~any one of 5
It is, after oil pump stops working, when making pipeline pressure release by main valve events, the oil return opening of hydraulic oil in pipeline from main valve
Fuel tank is flowed back at place.
7. a kind of pile press machine, which is characterized in that the master including guide's hydraulic control described in any one of claim 1~6 returns
Road Load Relief System, the epicoele of oil cylinder are rodless cavity, and the cavity of resorption of oil cylinder is rod chamber, the pipe at cylinder upper cavity oil and cavity of resorption oil inlet and outlet
Road is provided with connector (4), and the cavity of resorption of oil cylinder is connected with shut-off valve (14), and shut-off valve is located at oil cylinder cavity of resorption oil inlet and outlet and connector
Between pipeline on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811483152.6A CN109281874B (en) | 2018-12-05 | 2018-12-05 | Pilot hydraulic control main loop unloading system and pile press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811483152.6A CN109281874B (en) | 2018-12-05 | 2018-12-05 | Pilot hydraulic control main loop unloading system and pile press |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109281874A true CN109281874A (en) | 2019-01-29 |
| CN109281874B CN109281874B (en) | 2020-10-02 |
Family
ID=65173311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811483152.6A Active CN109281874B (en) | 2018-12-05 | 2018-12-05 | Pilot hydraulic control main loop unloading system and pile press |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109281874B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110541449A (en) * | 2019-09-19 | 2019-12-06 | 广西玉柴重工有限公司 | Safety device of hydraulic excavator |
| CN111577714A (en) * | 2020-05-18 | 2020-08-25 | 山东临工工程机械有限公司 | Hydraulic system and engineering machinery |
| CN114087249A (en) * | 2021-11-18 | 2022-02-25 | 国能神东煤炭集团有限责任公司 | Electro-hydraulic pressure control system and control method |
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| CN201380582Y (en) * | 2009-04-11 | 2010-01-13 | 广东伊之密精密机械有限公司 | Oil-outlet servo control device of injection molding machine |
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| Publication number | Publication date |
|---|---|
| CN109281874B (en) | 2020-10-02 |
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