CN104154282B - Excavator pile-up valve with overloading prevention function - Google Patents
Excavator pile-up valve with overloading prevention function Download PDFInfo
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- CN104154282B CN104154282B CN201410410068.7A CN201410410068A CN104154282B CN 104154282 B CN104154282 B CN 104154282B CN 201410410068 A CN201410410068 A CN 201410410068A CN 104154282 B CN104154282 B CN 104154282B
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- pressure
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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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/007—Overload
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
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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
- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
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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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/14—Energy-recuperation means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0473—Multiple-way safety valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The invention discloses an excavator pile-up valve with an overloading prevention function. The excavator pile-up valve comprises a valve body, and a first oil opening A1, a first pressure opening P1, a second pressure opening P2 and a third pressure opening P3 are formed in the valve body; an overload valve cavity is formed in the valve body, and an overload valve is arranged in the overload valve cavity; the overload valve cavity is communicated with an internal oil way between the third pressure opening P3 and the second pressure opening P2 and is further communicated with an oil return opening T, and the overload valve is used for controlling connection and disconnection between the internal oil way between the third pressure opening P3 and the second pressure opening P2 and the oil return opening T. The excavator pile-up valve with the overloading prevention function has the advantages that an external energy storing device is prevented from being damaged by excessive recovered energy when descending energy of an excavator big arm is recovered, working reliability is good, and energy is saved.
Description
Technical field
The present invention relates to a kind of pile-up valve, especially a kind of excavator pile-up valve with antioverloading function.
Background technology
Excavator, also known as excavation machinery (excavating machinery), is to be excavated higher or lower than holding machine with scraper bowl
The material in face, and load haulage vehicle or unload to the earthmoving machinery of rickyard.Excavator excavate material be mainly soil, coal,
Silt and the soil after pre- pine and rock.From the point of view of the development of engineering machinery in recent years, the development of excavator is relatively
Hurry up, excavator has become as one of topmost engineering machinery in engineering construction.What excavator now accounted for the overwhelming majority is complete
Hydraulic pressure full circle swinging excavator.The Hydraulic Power Transmission System of excavator by hydraulic pump by the power of electromotor pass to hydraulic motor,
The executive components such as hydraulic cylinder, push the work forward device action, thus completing various operations.
In the course of the work, its large arm frequently declines and rises excavator.In the work process of excavator, there are a kind of feelings
Shape is not need consumption of engine power, when that is, large arm falls from high to low.During big arm of digger declines, it
Also by reducing greatly, these energy are also wasted potential energy.At present, excavator there is no and be equipped with special energy regenerating dress
Put.
The Chinese invention patent of Application No. cn201320587141.9 discloses a kind of excavation with potential energy recovery device
Machine large arm energy regenerating device, including large arm and the master cylinder being fixed on large arm both sides, master cylinder connects oil by solenoid valve block
Case, is hinged with fluid force-transmitting mechanism between described large arm and frame, fluid force-transmitting mechanism is located between two master cylinders, and fluid passes
Force mechanisms connect accumulator, the hidden inside being fixed on large arm of accumulator by pipeline.Although the energy to excavator for this invention
Recovery system is described, but is not related to the introduction of the special valve of excavator energy regenerating.
Content of the invention
The present invention is for avoiding weak point present in above-mentioned prior art, provides and a kind of has digging of antioverloading function
Pick machine pile-up valve, to prevent the excessive damage external energy storage dress that recovers energy when reclaiming the energy that big arm of digger declines
Put, improve safe and reliable property.
The present invention is to solve technical problem to employ the following technical solutions.
A kind of excavator pile-up valve with antioverloading function, it is structurally characterized in that, including valve body, described valve body sets
It is equipped with the first hydraulic fluid port a1, first pressure mouth p1, second pressure mouth p2, the 3rd pressure port p3；
It is provided with an overload valve pocket, described overload valve intracavity is provided with an overload valve in described valve body；Described overload
Internal oil passages between valve pocket and described 3rd pressure port p3 and described second pressure mouth p2 are connected, described overload valve pocket also with
Oil return opening t is connected, and controls the interior oil between described 3rd pressure port p3 and described second pressure mouth p2 by described overload valve
Break-make between road and described oil return opening t.
A kind of construction featuress of excavator pile-up valve with antioverloading function of the present invention lie also in:
Described overload valve includes main valve housing, main valve plug, main spool spring, conical valve base, poppet valve core, cone valve spring, sleeve pipe and tune
Pressure screw；
Described main valve housing lower end is provided with overload valve pressure port, described overload valve pressure port and described second pressure mouth p2 it
Between be connected；It is provided with main valve plug and conical valve base, described conical valve base is located at the upper of described main valve plug in the inner chamber of described main valve housing
Side；Overload valve oil return opening t3 is provided with the outer peripheral face of described main valve housing, in described overload valve oil return opening t3 and described main valve housing
The part cavity below main valve plug in chamber communicates；
Described main valve plug top is provided with main valve plug groove, and the lower section of described main valve plug groove offers the first damping hole,
Described first damping hole is along the described main valve plug that axially penetrates through of described main valve plug, described main valve plug groove and described overload valve pressure
It is connected by described first damping hole between power mouth；The lower end of described main spool spring be located at described main valve plug groove in and with institute
The bottom land stating main valve plug groove abuts against, and the upper end of described main spool spring is abutted against with the lower surface of described conical valve base；Described cone
It is provided with axially penetrating through in the shoulder hole of described conical valve base, the lower end insertion of described poppet valve core along described conical valve base in valve seat
Within described shoulder hole epimere, the hypomere of described shoulder hole is the second damping hole, and described shoulder hole passes through described second damping hole
It is connected with the main valve housing inner chamber below poppet valve core and described main valve plug groove；Described sleeve pipe is sheathed on the epimere of described main valve housing
Outer peripheral face on, be formed with the first oil back chamber and the second oil return between the outer peripheral face of described sleeve pipe inwall and described main valve housing
Chamber；The upper end of described poppet valve core is located in the inner chamber of described sleeve pipe, is provided with cone valve spring, described pressure regulation on described poppet valve core
The lower end of screw is threaded in the inner chamber epimere of described sleeve pipe, the lower end of the upper end of described cone valve spring and described pressure regulating screw
Abut against；Described first oil back chamber and the intracavity inter-connection of described sleeve pipe, described second oil back chamber and described overload valve oil return opening
T3 is connected；Described overload valve oil return opening t3 is connected with the oil return opening t of valve body.
One nut is provided with the top of described sleeve pipe, with screw thread cooperation between described nut and described pressure regulating screw
Mode is connected；It is provided with ladder shape sealing ring between described nut and described sleeve pipe.
One the second hydraulic fluid port a2 is additionally provided with described valve body.
Compared with the prior art, the present invention has the beneficial effect that:
A kind of excavator pile-up valve with antioverloading function of the present invention, when p2 mouth pressure overload, pressure oil warp
Position between two damping hole arrival poppet valve cores and conical valve base, now the ladder in the hole in conical valve base is full of pressure oil.When this
The oil pressure overload of place's pressure oil and when reaching overload valve set pressure, pressure oil acts on poppet valve core, promote poppet valve core to
Upper shifting, makes to be separated so that being connected between the stairstepping inner chamber of conical valve base and the first oil back chamber between poppet valve core and conical valve base,
So that pressure oil passes sequentially through the first oil back chamber, the second oil back chamber returns to overload valve oil return opening t3, and then return to outside
Among oil sump tank.When described overload valve is installed on described overload valve intracavity, the oil return of described overload valve oil return opening t3 and valve body
Mouth t is connected；Now, communicate between described second oil back chamber and overload valve oil return opening t3.Therefore, main valve plug upper end is interior
Communicate with oil return in chamber, the pressure of main valve plug upper end is less than the pressure at the overload valve pressure port below main valve plug, main valve plug quilt
Pressure oil pushes up, and so that overload valve pressure port is communicated with oil return opening t, thus can be for the unloading of p2 mouth it is ensured that system safety.
P2 mouth arranges overload valve, prevents the too high damage external energy storage device of overload pressure during energy regenerating.
A kind of excavator pile-up valve with antioverloading function of the present invention, has and can decline reclaiming big arm of digger
Energy when prevent from recovering energy that excessive damage external energy storage device, functional reliability be good, energy saving the advantages of.
Brief description
Fig. 1 is a kind of front view of excavator pile-up valve with antioverloading function of the present invention.
Fig. 2 is a kind of top view of excavator pile-up valve with antioverloading function of the present invention.
Fig. 3 is a kind of left view of excavator pile-up valve with antioverloading function of the present invention.
Fig. 4 is a kind of hydraulic schematic diagram of excavator pile-up valve with antioverloading function of the present invention.
Fig. 5 is a-a sectional view (the cuing open of second logical valve of the present invention, the second guiding valve and the second logic control valve in Fig. 2
View).
Fig. 6 is b-b sectional view (the cuing open of first logical valve of the present invention, the first guiding valve and the first logic control valve in Fig. 2
View).
Fig. 7 is the b-b sectional view in Fig. 2 during energy regenerating.
A-a sectional view in Fig. 2 when Fig. 8 discharges for energy.
Fig. 9 is the partial view (overload valve does not transship, attonity) of the c-c sectional view in Fig. 3.
Figure 10 is the partial view (overload valve transships, and transships valve events) of the c-c sectional view in Fig. 3.
Figure 11 is the structure chart of the overload valve in Fig. 9 and 10.
Label in accompanying drawing 1～accompanying drawing 11: 1 valve body, 2 first check valves, 3 second check valves, 301 second nonreturn valve cores, 302
Second one-way valve spring, 303 second check valve plug screws, 4 big arm cylinders, 5 first piston chambers, 6 first logic valve pockes, 7 first patrol
Volume control valve, 701 first logic control valve bodies, 702 first logic control valve elements, 703 first logic control valve springs, 704 the
One logic control valve pocket, 705 second logic control oil ducts, 706 the 3rd logic control oil ducts, 8 first oil ducts, 9 second oil ducts, 10
3rd oil duct, 11 the 4th oil ducts, 12 the 5th oil ducts, 13 the 6th oil ducts, 14 the 7th oil ducts, 15 nuts, 16 pressure regulating screws, 17 sets
Pipe, 18 energy conversion devices, 19 ladder shape sealing rings, 20 first logical valves, 2,001 first logic spools, 2,002 first logical valves
Spring, 21 second logical valves, 2,101 second logic spools, 2,102 second logic valve springs, 2,103 second logical valve plug screws, 22
One outside oil circuit, 23 external energy storage devices, 24 first guiding valves, 2,401 first slide valve levers, 2,402 first slide valve springs, 2403
First left sealing cap, 2,404 first right aling caps, 25 second guiding valves, 2,501 second slide valve levers, 2,502 second slide valve springs, 2,503 second
Left sealing cap, 2,504 second right aling caps, 26 overload valve pockets, 27 overload valves, 2701 main valve housings, 2702 main valve plugs, 2703 main spool springs,
2704 conical valve bases, 2705 poppet valve cores, 2706 cone valve springs, 2707 overload valve pressure port, 2708 main valve plug grooves, 2,709 first resistances
Buddhist nun hole, 2,710 second damping holes, 2,712 first oil back chambers, 2,713 second oil back chambers, 28 second piston chambers, 29 second check valves
Chamber, 2,901 second check valve upper cavities, 2,902 second check valve lower chambers, 30 second logic valve pockes, on 3,001 second logical valves
Cavity, 3,002 second logical valve lower chambers, 31 second logic control valves, 3,101 second logic control valve bodies, 3,102 second logics
Control valve element, 3,103 second logic control valve springs, 3,104 second logic control valve pockets, 3105 the 5th logic control oil ducts,
3105 the 6th logic control oil ducts.
Below by way of specific embodiment, and the invention will be further described to combine accompanying drawing.
Specific embodiment
Referring to accompanying drawing 1～accompanying drawing 11, a kind of excavator pile-up valve with antioverloading function of the present invention, including valve body
1, described valve body 1 is provided with the first hydraulic fluid port a1, first pressure mouth p1, second pressure mouth p2, the 3rd pressure port p3；
It is provided with an overload valve pocket 26 in described valve body 1, in described overload valve pocket 26, be provided with an overload valve 27；Institute
State overload valve pocket 26 to be connected with the internal oil passages between described 3rd pressure port p3 and described second pressure mouth p2, described overload
Valve pocket 26 is also connected with oil return opening t, controls described 3rd pressure port p3 and described second pressure mouth p2 by described overload valve 27
Between internal oil passages and described oil return opening t between break-make.When big arm of digger declines, gravitional force is excessive, energy turns
The high pressure oil pressure that gasifying device 18 produces is excessive, may damage whole energy-recuperation system.So during declining, once
The high pressure oil pressure being converted exceed overload valve set pressure, hydraulic oil when p2 mouth is to p3 mouth, between p2 mouth and p3 mouth
Overload valve is opened, by the Stress control of hydraulic oil setting in safety range it is ensured that the safety of whole system.
Described overload valve 27 includes main valve housing 2701, main valve plug 2702, main spool spring 2703, conical valve base 2704, poppet valve core
2705th, cone valve spring 2706, sleeve pipe 17 and pressure regulating screw 16；
Described main valve housing 2701 lower end is provided with overload valve pressure port 2707, described overload valve pressure port 2707 and described the
It is connected between two pressure port p2；It is provided with main valve plug 2702 and conical valve base 2704 in the inner chamber of described main valve housing 2701, described
Conical valve base 2704 is located at the top of described main valve plug 2702；It is provided with overload valve oil return opening on the outer peripheral face of described main valve housing 2701
T3, described overload valve oil return opening t3 are communicated positioned at the part cavity of main valve plug 2702 lower section with described main valve housing 2701 inner chamber；
Described main valve plug 2702 top is provided with main valve plug groove 2708, and the lower section of described main valve plug groove 2708 offers
First damping hole 2709, described first damping hole 2709 axially penetrates through described main valve plug 2702 along described main valve plug 2702,
It is connected by described first damping hole 2709 between described main valve plug groove 2708 and described overload valve pressure port 2707；Described
The lower end of main spool spring 2703 is located in described main valve plug groove 2708 and is abutted against with the bottom land of described main valve plug groove 2708,
The upper end of described main spool spring 2703 is abutted against with the lower surface of described conical valve base 2704；It is provided with edge in described conical valve base 2704
That described conical valve base 2704 axially penetrates through in the shoulder hole of described conical valve base 2704, the lower end insertion institute of described poppet valve core 2705
State within shoulder hole epimere, the hypomere of described shoulder hole is the second damping hole 2710, and described shoulder hole damps by described second
Hole 2710 is connected with main valve housing 2701 inner chamber of poppet valve core 2705 lower section and described main valve plug groove 2708；17 sets of described sleeve pipe
On the outer peripheral face of the epimere of described main valve housing 2701, described sleeve pipe 17 inwall and described main valve housing 2701 outer peripheral face it
Between be formed with the first oil back chamber 2712 and the second oil back chamber 2713；The upper end of described poppet valve core 2705 is located at the interior of described sleeve pipe 17
In chamber, on described poppet valve core 2705, it is provided with cone valve spring 2706, the lower end of described pressure regulating screw 16 is threaded into described set
In the inner chamber epimere of pipe 17, the upper end of described cone valve spring 2706 is abutted against with the lower end of described pressure regulating screw 16；Described first
Oil back chamber 2712 and the intracavity inter-connection of described sleeve pipe 17, described second oil back chamber 2713 is connected with described overload valve oil return opening t3
Logical；Described overload valve oil return opening t3 is connected with the oil return opening t of valve body 1.
Described overload valve such as Figure 11, including main valve housing, main valve plug, main spool spring, conical valve base, poppet valve core, cone valve spring, set
The parts such as pipe, nut and pressure regulating screw.Overload valve pressure port below main valve housing is in parallel with second pressure mouth p2, overload valve oil return
Mouth t3 is connected with the oil return opening t of valve body.When p2 mouth pressure overload, pressure oil, through the first damping hole 1, the second damping hole 2, arrives
Reach the position between poppet valve core and conical valve base, now the ladder in the hole in conical valve base is full of pressure oil.Oil of pressure oil at this
Pressure overload and reach overload valve set pressure (this set pressure is related to the degree that cone valve spring is compressed, can be by pressure regulation spiral shell
Nail adjustment.) when, pressure oil acts on poppet valve core, promotes poppet valve core to move upwards, makes to be separated between poppet valve core and conical valve base,
Make to be connected between the stairstepping inner chamber of conical valve base and the first oil back chamber, so that pressure oil passes sequentially through the first oil return
Chamber, the second oil back chamber return to overload valve oil return opening t3, and then return among outside oil sump tank.When described overload valve is installed on institute
When stating overload valve intracavity, described overload valve oil return opening t3 is connected with the oil return opening t of valve body；Now, described second oil back chamber with
Communicate between overload valve oil return opening t3.Therefore, communicate with oil return in the inner chamber of main valve plug upper end, the pressure of main valve plug upper end
Less than the pressure at the overload valve pressure port below main valve plug, main valve plug is pushed up by pressure oil, makes overload valve pressure port and returns
Hydraulic fluid port t communicates, thus can be for the unloading of p2 mouth it is ensured that system safety.
One nut 15 is provided with the top of described sleeve pipe 17, with spiral shell between described nut 15 and described pressure regulating screw 16
The mode of stricture of vagina cooperation is connected；It is provided with ladder shape sealing ring 19 between described nut and described sleeve pipe 17.
One the second hydraulic fluid port a2 is additionally provided with described valve body 1.A2 mouth is standby hydraulic fluid port, is in parallel with a1 mouth, in work
When making, a1 and a2 mouth arbitrarily select first, facilitating connecting line, and another sealed in external is blocked up and is closed.
Described first hydraulic fluid port a1 is connected with described second pressure mouth p2 by the first of pile-up valve the outside oil circuit 22, described
It is provided with first check valve 2 so that the hydraulic oil at described first hydraulic fluid port a1 can be through described outer at second pressure mouth p2
Second pressure mouth p2 described in portion's oil circuit single flow direction；Pile-up valve between described first pressure mouth p1 and described second pressure mouth p2
One the second check valve 3 is also provided with internal oil passages so that the hydraulic oil when energy discharges is merely able to from second pressure mouth
P2 single flow direction first pressure mouth p1；
Described first pressure mouth p1 is connected with oil cylinder of big arm of digger 4, and described first pressure mouth p1 supplies to big arm cylinder 4
When oily, large arm rises, and during described first pressure mouth p1 oil return, large arm declines；The inside by pile-up valve for the described second pressure mouth p2
Oil circuit is connected with described 3rd pressure port p3, and described 3rd pressure port p3 is connected with an external energy storage device 23；
It is provided with the first piston chamber 5 and the first logic valve pocke 6, described first piston chamber 5 and the first logic in described valve body 1
It is connected by the first oil duct 8 between valve pocket 6；Described first logic valve pocke 6 passes through the internal galleries and described first of pile-up valve
Pressure port p1 is connected, and described first logical valve 20 is arranged in described first logic valve pocke 6, for controlling described first pressure
Break-make between mouth p1 and described first oil duct 8；First logical valve 20 includes the first logic spool 2001 and the first logical valve bullet
Spring 2002；First logic spool 2001 is arranged in described first logic valve pocke 6, and the first logic valve spring 2002 is located at described
Below one logic spool 2001, described first logic valve spring 2002 lower section is by a plug screw closing；
Described first logic valve pocke 6 is also by the second oil duct 9 and the 3rd oil duct 10 and the first logic being arranged at outside valve body 1
Control valve 7 is connected；Described first logic control valve 7 include the first logic control valve body 701, the first logic control valve element 702,
First logic control valve spring 703, interface pib1, interface t1；Described first logic control valve body 701 is fixed on described valve body 1
On, it is provided with the first logic control valve pocket 704 in the first logic control valve body 701, described first logic control valve element 702,
One logic control valve spring 703 may be contained within described first logic control valve pocket 704, described first logic control valve pocket 704
By passing through the second logic control oil duct 705 and the 3rd logic control oil duct 706 and described second oil duct 9 and the 3rd oil duct respectively
10 are connected；Described first logic control valve element 702 is used for controlling described second logic control oil duct 705 and the 3rd logic control
Break-make between oil duct 706；Described interface pib1 controls oily pi1 to be connected by outside oil circuit and excavator；Described interface t1
It is connected with oil return opening t；
It is provided with the first guiding valve 24 in described first piston chamber 5；Described first guiding valve 24 include the first slide valve lever 2401,
One slide valve spring 2402, the first left sealing cap 2403 and the first right aling cap 2404；Described first slide valve lever 2401 is inserted in described
In one piston chamber 5, the left and right two ends of described first piston chamber 5 are respectively by described first left sealing cap 2403 and the first right aling cap 2404
Closing, thus described first slide valve lever 2401 is closed within described valve body 1；Described first slide valve spring 2402 is located at described
In the inner chamber of the first left sealing cap 2403, it is used for so that the first slide valve lever 2401 resets to the right after being moved to the left；Described first guiding valve
The right-hand member of bar 2401 is inserted in the inner chamber of described first right aling cap 2404, and the inner chamber of described first right aling cap 2404 passes through interface
Pia1 controls oily pi1 to be connected with excavator.
Outline drawing as a kind of excavator pile-up valve with antioverloading function that Fig. 1-3 is the present invention.In pile-up valve
It is also provided with the second logical valve and the second logic control valve, for making hydraulic oil that external energy storage device reclaimed again
Use, rising for big arm of digger provides the pressure energy.Fig. 4 is the hydraulic schematic diagram of pile-up valve.Fig. 5 and Fig. 6 is respectively in Fig. 2
A-a sectional view and b-b sectional view, can be seen that the first logical valve and the internal structure of the second logical valve respectively.Oil return opening t is collection
Become the oil return opening of valve, be connected with outside oil sump tank.Fig. 6 is the first logical valve, the first guiding valve and the first logic control valve
Structure chart, realizes the large arm to excavator for the pile-up valve by parts such as the first logical valve, the first guiding valve and the first logic control valves
Energy recovery function when oil cylinder falls.Fig. 5 is the structure chart of the second logical valve, the second guiding valve and the second logic control valve, leads to
When crossing the big arm cylinder rising that the parts such as the second logical valve, the second guiding valve and the second logic control valve realize excavator, will reclaim
The energy of storage discharges again, helps big arm cylinder to rise, thus energy saving.
After Fig. 7 is the action of the first logical valve, the first guiding valve and the first logic control valve in Fig. 6 when can reclaim
Figure.Now, the second logical valve in Fig. 5, the second guiding valve and the second logic control valve attonity, the second logical valve, the second guiding valve
It is closed mode, noenergy release movement.
After the action of the second logical valve in Fig. 5 when Fig. 8 discharges for energy, the second guiding valve and the second logic control valve
Figure.Now, the first logical valve in Fig. 6, the first guiding valve and the first logic control valve attonity, the first logical valve, the first guiding valve
It is to close, noenergy recovery action.
Fig. 9 is in energy recovery process, structure chart when overload valve does not transship, and overload valve is closed, No-mistake Principle
Protection act.Figure 10 is in energy recovery process, structure chart during overload valve overload, and overload valve is in open mode, has overload
Protection act.Figure 11 is the sectional view of the overload valve in Fig. 9 and 10.
A kind of energy recovery process of excavator pile-up valve with antioverloading function of the present invention is as follows.
During oil cylinder of big arm of digger declines, from Fig. 4 hydraulic schematic diagram with the b-b sectional view of Fig. 6, interface
Pia1 and pib1 be parallel to by exterior line together with, connecting excavator controls oily pi1.Pia2 and pib2 is by exterior tube
Road is parallel to together, and connecting excavator controls oily pi2.When oil circuit control pi1 provides pressure oil, under oil cylinder of big arm of digger
Fall；When pi2 provides pressure oil, oil cylinder of big arm of digger rises.When pi1 provides pressure, when pressure reaches 0.5mpa, that is,
Pib1 reaches 0.5mpa, and the first logic control valve element of the first logical valve control valve is pressed towards the first logic control valve spring, the
Oil circuit between second logic control oil duct 705 and the 3rd logic control oil duct 706 is cut off by one logic control valve element, and by the
Three logic control oil ducts 706 pass through interface t1 and oil return opening t and connect；Now, the 3rd logic control oil duct 706 and the 3rd oil duct 10
Communicate.
First logic valve pocke is divided into ante-chamber and two cavitys of back cavity by the first logic spool；Above the first logic spool
For ante-chamber, below the first logic spool for back cavity；Wherein, this ante-chamber is communicated with first pressure mouth p1.Due to second
Oil duct 9 is connected with the back cavity of the ante-chamber above the first logic spool and lower section respectively with the 3rd oil duct 10, the therefore first logic
The back cavity of valve is connected by the 3rd oil duct, the 3rd logic control oil duct oil return opening t, and the pressure of the back cavity of the first logical valve is 0.
By described first logic spool cut-off between ante-chamber above first logic spool and described first oil duct, when the first logic spool
During decline, ante-chamber and the first oil duct are connected.Because the back cavity of the first logical valve connects so that after the first logical valve with oil return opening
The pressure in chamber is 0, and the ante-chamber above the first logic spool is communicated with first pressure mouth p1, and p1 mouth hydraulic oil is by the first logical valve
Core is pressed downward, and so that the first logical valve is opened and connects p1 mouth and the first oil duct.
When pi1 pressure increases more than 0.7mpa, that is, pia1 pressure is more than 0.7mpa, and pia1 pressure oil promotes the first guiding valve
It is moved to the left, make a1 mouth pass through the first piston chamber and the connection of the first oil duct, so that p1 mouth is connected with a1 mouth.As shown in fig. 6, by
In increased the second check valve between p1 mouth and p2 mouth, make p1 mouth oil directly cannot enter p2 mouth by the 4th oil duct, but
P2 mouth oil can enter to enter p1 mouth by the 4th oil duct provides energy release so that oil cylinder is increased.Energy conversion device 18 is arranged on a1
Between mouth and p2 mouth.Energy conversion device 18 outside the connection of a1 mouth, potential energy when oil cylinder is declined becomes hydraulic oil to pass through
P2 mouth enters in the pile-up valve of the present invention, then enters external energy storage device by p3 mouth, thus energy stores are got up, real
The purpose of the energy regenerating now big arm of digger being declined.
First guiding valve of the pile-up valve of the present invention also has flow control function.Flow control process is as follows: when pi1 pressure
During more than 0.7mpa, after the first oil duct is connected by the first guiding valve with a1 mouth, by controlling the pressure of pi1 in 0.7mpa～3.5mpa
Between change, different pressures realize different thrusts to the first guiding valve, realize the first guiding valve and are in diverse location, thus controlling the
Openings of sizes between one oil duct and a1 mouth, final control realizes the flow control to p1 mouth to a1 mouth by the flow at opening
System, reaches control cylinder decrease speed so that big arm of digger can slowly decline, and leads to thing without unexpected landing
Therefore, improve the security reliability of excavator work.
It is provided with the second piston chamber 28, the second unidirectional valve pocket 29 and the second logic valve pocke 30 in described valve body 1, described second
It is connected by the 7th oil duct 14 between piston chamber 28 and the second logic valve pocke 30；Described second piston chamber 28 and the second check valve
It is connected by the 4th oil duct 11 between chamber 29；
It is provided with logical between the second unidirectional valve pocket 29 and the 4th oil duct 11 for controlling in described second unidirectional valve pocket 29
The second disconnected check valve 3, described second check valve 3 includes the second nonreturn valve core 301, the second one-way valve spring 302 and the second list
To valve plug screw 303；Described second unidirectional valve pocket 29 is isolated into the second check valve upper cavity 2901 by described second nonreturn valve core 301
With the second check valve lower chamber 2902, described second check valve upper cavity 2901 is connected with first pressure mouth p1；When second is single
To valve element 301 move down when, described 4th oil duct 11 is by described second check valve upper cavity 2901 and described first pressure
Mouth p1 is connected；Described second check valve plug screw 303 is arranged in the outlet of the described second unidirectional valve pocket 29, by the second check valve
The outlet closing of the second check valve lower chamber 2902 lower section in chamber 29；It is single that described second one-way valve spring 302 is located at described second
To between valve element 301 and the second check valve plug screw 303；
It is provided with logical between the second logic valve pocke 30 and the 7th oil duct 14 for controlling in described second logic valve pocke 30
The second disconnected logical valve 21；Described second logical valve 21 includes the second logic spool 2101, the second logic valve spring 2102 and
Two logical valve plug screws 2103；Described second logic valve pocke 30 is isolated into the second logical valve epicoele by described second logic spool 2101
Body 3001 and the second logical valve lower chamber 3002, described second logical valve upper cavity 3001 passes through the internal galleries and the of pile-up valve
Two pressure port p2 are connected；When the second logic spool 2101 moves down, described 7th oil duct 14 is by described second logic
Valve upper cavity 3001 is connected with described second pressure mouth p2；Described second logical valve plug screw 2103 is arranged at described second logic
In the outlet of valve pocket 30, by the outlet closing of the second logic valve pocke 30；Described second logic valve spring 2102 is located at described second
Between logic spool 2101 and the second logical valve plug screw 2103；Described second logical valve upper cavity 3001 is connected with the 5th oil duct 12
Logical, the second logical valve lower chamber 3002 is connected with the 6th oil duct 13；
Second logic control valve 31 includes the second logic control valve body 3101, the second logic control valve element 3102, second patrols
Collect control valve spring 3103, interface pib2, interface t2；Described second logic control valve body 3101 is fixed on described valve body 1, the
It is provided with the second logic control valve pocket 3104, described second logic control valve element 3102, second in two logic control valve bodies 3101
Logic control valve spring 3103 may be contained within described second logic control valve pocket 3104；Described second logic control valve pocket 3104
By passing through the 5th logic control oil duct 3105 and the 6th logic control oil duct 3106 and described 5th oil duct 12 and the 6th respectively
Oil duct 13 is connected；Described second logic control valve element 3102 is used for controlling described 5th logic control oil duct 3105 and the 6th to patrol
Collect the break-make controlling between oil duct 3106；Described interface pib2 controls oily pi2 to be connected by outside oil circuit and excavator；Described
Interface t2 is connected with oil return opening t；
Described second piston chamber 28 is arranged at the second guiding valve 25；It is sliding that second guiding valve 25 includes the second slide valve lever 2501, second
Valve spring 2502, the second left sealing cap 2503 and the second right aling cap 2504；It is sliding that described second slide valve lever 2501 is inserted in described second
In valve pocket 28, the left and right two ends of described second piston chamber 28 are respectively by described second left sealing cap 2503 and the second right aling cap 2504 envelope
Close, thus described second slide valve lever 2501 is closed within described valve body 1；Described second slide valve spring 2502 is located at described the
In the inner chamber of two left sealing caps 2503, it is used for so that the second slide valve lever 2501 resets to the right after being moved to the left；Described second slide valve lever
2501 right-hand member is inserted in the inner chamber of described second right aling cap 2504, and the inner chamber of described second right aling cap 2504 passes through interface
Pia2 controls oily pi2 to be connected with excavator.
As shown in figure 5, when controlling oily pi2 to provide pressure oil, when pressure reaches 0.5mpa, that is, pia2 pressure reaches
0.5mpa, the second logic control valve element of the second logical valve control valve is pushed to and moves down, and the second logic control valve element flows the 5th
Road and the cut-out of the 6th runner, and the 6th runner is connected with oil return t, that is, the second logical valve lower chamber 3002 of the second logical valve is pressed
Second logical valve is pressed to and moves down for 0, p2 mouth (p2, p3, p4 are parallel interfaces, are connected to the memorizer that recovers energy) pressure oil by power,
Second logic spool of the second logical valve moves down so that the second logical valve is opened, and makes p2 mouth pass through the second logical valve upper cavity 3001
It is connected with the 7th runner.When pi2 pressure is more than 0.7mpa, that is, pia2 pressure is more than 0.7mpa, and the second guiding valve is pushed to a left side, makes
7th runner is communicated with the 4th runner, pressure current from external energy storage device 23 through p2 mouth to the 7th runner, then to the 4th stream
Road, the second check valve pushed open between p2 and p1 enters into p1 mouth, so that the energy of recovery is discharged again in the big arm cylinder making digging machine
Rise, it is achieved thereby that the recycling recovering energy, saved the energy, improve the environmental-protecting performance of excavator work.
Ultimate principle, principal character and the advantages of the present invention of the present invention have been shown and described above.The technology of the industry
The simply present invention it should be appreciated that the present invention is not restricted to the described embodiments, described in above-described embodiment and description for the personnel
Principle, without departing from the spirit and scope of the present invention the present invention also have various changes and modifications, these change and
Improvement both falls within the range of claimed invention.The protection domain of application claims by appending claims and its
Equivalent defines.
Claims (3)
1. a kind of excavator pile-up valve with antioverloading function, is characterized in that, including valve body (1), described valve body (1) sets
It is equipped with the first hydraulic fluid port a1, first pressure mouth p1, second pressure mouth p2, the 3rd pressure port p3；
It is provided with overload valve pocket (26) in described valve body (1), in described overload valve pocket (26), be provided with an overload valve
(27)；Described overload valve pocket (26) is connected with the internal oil passages between described 3rd pressure port p3 and described second pressure mouth p2
Logical, described overload valve pocket (26) is also connected with oil return opening t, controls described 3rd pressure port p3 and institute by described overload valve (27)
State the break-make between the internal oil passages between second pressure mouth p2 and described oil return opening t；
Described overload valve (27) include main valve housing (2701), main valve plug (2702), main spool spring (2703), conical valve base (2704),
Poppet valve core (2705), cone valve spring (2706), sleeve pipe (17) and pressure regulating screw (16)；
Described main valve housing (2701) lower end is provided with overload valve pressure port (2707), described overload valve pressure port (2707) with described
It is connected between second pressure mouth p2；It is provided with main valve plug (2702) and conical valve base in the inner chamber of described main valve housing (2701)
(2704), described conical valve base (2704) is located at the top of described main valve plug (2702)；On the outer peripheral face of described main valve housing (2701)
It is provided with overload valve oil return opening t3, described overload valve oil return opening t3 and described main valve housing (2701) inner chamber are positioned at main valve plug
(2702) the part cavity below communicates；
Described main valve plug (2702) top is provided with main valve plug groove (2708), and the lower section of described main valve plug groove (2708) opens up
There is the first damping hole (2709), described first damping hole (2709) axially penetrates through described main valve along described main valve plug (2702)
Core (2702), passes through described first damping hole between described main valve plug groove (2708) and described overload valve pressure port (2707)
(2709) it is connected；The lower end of described main spool spring (2703) be located at described main valve plug groove (2708) in and with described main valve plug
The bottom land of groove (2708) abuts against, and the upper end of described main spool spring (2703) and the lower surface of described conical valve base (2704) offset
Connect；It is provided with axially penetrating through in described conical valve base (2704) along described conical valve base (2704) in described conical valve base (2704)
Shoulder hole, the lower end of described poppet valve core (2705) is inserted within described shoulder hole epimere, and the hypomere of described shoulder hole is the second resistance
Buddhist nun hole (2710), described shoulder hole passes through the main valve housing (2701) below described second damping hole (2710) and poppet valve core (2705)
Inner chamber is connected with described main valve plug groove (2708)；Described sleeve pipe (17) is sheathed on the outer of the epimere of described main valve housing (2701)
On side face, it is formed with the first oil back chamber (2712) between the outer peripheral face of described sleeve pipe (17) inwall and described main valve housing (2701)
With the second oil back chamber (2713)；The upper end of described poppet valve core (2705) is located in the inner chamber of described sleeve pipe (17), described poppet valve core
(2705) it is provided with cone valve spring (2706) on, the lower end of described pressure regulating screw (16) is threaded into the interior of described sleeve pipe (17)
In the epimere of chamber, the upper end of described cone valve spring (2706) and the lower end of described pressure regulating screw (16) abut against；Described first oil return
Chamber (2712) and intracavity inter-connection, described second oil back chamber (2713) and the described overload valve oil return opening t3 phase of described sleeve pipe (17)
Connection；Described overload valve oil return opening t3 is connected with the oil return opening t of valve body (1).
2. a kind of excavator pile-up valve with antioverloading function according to claim 1, is characterized in that, described sleeve pipe
(17) nut (15) is provided with top, with screw thread cooperation between described nut (15) and described pressure regulating screw (16)
Mode is connected；It is provided with ladder shape sealing ring (19) between described nut and described sleeve pipe (17).
3. a kind of excavator pile-up valve with antioverloading function according to claim 1, is characterized in that, described valve body
(1) it is additionally provided with a second hydraulic fluid port a2 on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410410068.7A CN104154282B (en) | 2014-08-19 | 2014-08-19 | Excavator pile-up valve with overloading prevention function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410410068.7A CN104154282B (en) | 2014-08-19 | 2014-08-19 | Excavator pile-up valve with overloading prevention function |
Publications (2)
| Publication Number | Publication Date |
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| CN104154282A CN104154282A (en) | 2014-11-19 |
| CN104154282B true CN104154282B (en) | 2017-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410410068.7A Active CN104154282B (en) | 2014-08-19 | 2014-08-19 | Excavator pile-up valve with overloading prevention function |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102005061991A1 (en) * | 2005-12-23 | 2007-07-05 | Bosch Rexroth Aktiengesellschaft | Hydrostatic drive in particular for commercial vehicle, comprises hydro-pump for storage and recycling of energy |
| CN201786797U (en) * | 2010-09-30 | 2011-04-06 | 李金海 | Excavator load sensitive pressure compensation multi-way valve |
| CN202251264U (en) * | 2011-10-08 | 2012-05-30 | 山河智能装备股份有限公司 | Potential energy recycling device for hydraulic excavator |
| CN202531513U (en) * | 2012-05-10 | 2012-11-14 | 合肥长源液压股份有限公司 | Back pressure valve for hydraulic oil return system |
| CN102758808B (en) * | 2012-07-26 | 2015-03-11 | 徐州徐工挖掘机械有限公司 | Pilot oil source control block of front high-pressure filter |
| CN204004623U (en) * | 2014-08-19 | 2014-12-10 | 合肥长源液压股份有限公司 | A kind of excavator integrated valve with antioverloading function |
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