CN104591012B - Hydraulic control system for single cylinder pin type telescopic boom and engineering machinery - Google Patents
Hydraulic control system for single cylinder pin type telescopic boom and engineering machinery Download PDFInfo
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- CN104591012B CN104591012B CN201410833900.4A CN201410833900A CN104591012B CN 104591012 B CN104591012 B CN 104591012B CN 201410833900 A CN201410833900 A CN 201410833900A CN 104591012 B CN104591012 B CN 104591012B
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- oil cylinder
- control system
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
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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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- 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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a single cylinder pin type hydraulic control system and engineering machinery. The single cylinder pin type hydraulic control system comprises a first one-way valve, a balance valve, a first reversing valve and a first energy accumulator for providing pin pulling pressure for a pin, wherein the oil inlet of the first one-way valve is connected with a rod cavity of a telescopic cylinder, the oil outlet of the first one-way valve is connected with the first energy accumulator, the first reversing valve is arranged on an oil path between the rod cavity and a rodless cavity of the telescopic cylinder and a pressure oil source, the balance valve is arranged on an oil path between the rod cavity and the rodless cavity of the telescopic cylinder and the first reversing valve, and the hydraulic control system also comprises a pressure release valve and a first damper valve, the control end of the balance valve is connected with an oil tank by the pressure release valve, and the first damper valve is connected with the rod cavity of the telescopic cylinder. The single cylinder pin type hydraulic control system and the engineering machinery can provide stable and reliable pin pulling pressure.
Description
Technical field
The present invention relates to the control field of single-cylinder bolt type telescopic boom, it is used for single-cylinder bolt type telescopic boom particularly to a kind of
Hydraulic control system and the engineering machinery with it.
Background technology
Occur in that a kind of telescopic arm with single telescopic oil cylinder, the piston of this telescopic oil cylinder in crane field in recent years
Bar is connected to basic arm, and cylinder barrel is provided with cylinder head, and the both sides of cylinder head are provided with corresponding two cylinder pin, in this two cylinder pins
Heart axle is substantially coplanar with the central shaft of described telescopic oil cylinder, and the cylinder barrel of this telescopic oil cylinder can be when above-mentioned cylinder pin stretches out or withdraws
Optionally lock or discharge its relative position with arbitrary section telescopic arm.Additionally, between adjacent each section telescopic arm and
It is equipped with arm pin, between adjacent telescopic arm and between basic arm and first segment telescopic arm between basic arm and the first telescopic arm
Relative position can optionally lock or discharge by this arm pin.
The cylinder barrel of this telescopic oil cylinder can first pass through cylinder pin and minor details telescopic arm and lock, and pass through retraction arm pin by end simultaneously
Section telescopic arm and section telescopic arm release second from the bottom, now the cylinder barrel of this telescopic oil cylinder can be by minor details telescopic arm by extending action
Take out of；After minor details telescopic arm reaches precalculated position, it is relocked with section telescopic arm second from the bottom, withdraw telescopic oil cylinder
It is simultaneously locked by cylinder barrel with section telescopic arm second from the bottom, then releases section telescopic arm second from the bottom with section telescopic arm third from the bottom
Put, now the cylinder barrel of telescopic oil cylinder can by second from the bottom section telescopic arm take out of, the like i.e. can achieve each section telescopic arm according to
Secondary stretch out.
In such scheme, the Plug Action of cylinder pin and arm pin general respectively by the cylinder pin oil cylinder mutually fixing with cylinder barrel and
Arm pin oil cylinder is controlled, and flexible the flexible of i.e. telescopic oil cylinder of telescopic arm is typically realized by telescopic arm oil circuit control.Logical
In the case of often, the oil circuit control of cylinder pin oil cylinder and arm pin oil cylinder generally adopts independent oil sources (separating with telescopic arm oil circuit control),
This independent oil sources can be by the core pipe in telescopic oil cylinder to cylinder pin oil cylinder or arm pin oil cylinder fuel feeding, to realize cylinder pin or arm
The action of pin.
However, the major defect of this scheme is：Core pipe is elongated tubular, less stable, and needs independent sealing
And guiding, there are strict requirements to oil cylinder instantaneous velocity, and be cantilever beam, inner core tube and outer core pipe easily scrape iron filings, pollution
System；Core pipe occupies rodless cavity effective active area, therefore increases oil cylinder internal diameter parameter, thus increasing oil cylinder weight；
When telescopic oil cylinder high speed is stretched out, because oil pump repairing of pulling pin is not enough, easily cause core pipe reduced pressure, cylinder pin oil cylinder/arm pin
Oil cylinder may be automatically releasable, when telescopic oil cylinder is retracted at a high speed, because core pipe fluid and oil pump fluid are required to by overflow valve
Overflow, leads to core pipe pressure rise, easily causes core pipe and destroys；Finally, in telescopic oil cylinder telescopic process, pump of pulling pin is located all the time
In overflow situation, engine torque loses than larger.
Number of patent application be CN201210210419, entitled " hydraulic control system of latch and engineering machinery " special
In sharp document, eliminate the core pipe being arranged in telescopic oil cylinder, using telescopic oil cylinder in telescopic process, rodless cavity or have bar
Chamber oil circuit passes through the first unidirectional valve group to the first accumulator topping up, thus being realized respectively by the first reversal valve and the second reversal valve
The insert-pull pin of cylinder pin oil cylinder and arm pin oil cylinder controls, and the oil return of the first check valve and the second check valve is by another group of unidirectional valve oil
Road is discharged to rodless cavity and rod chamber respectively.
Although eliminating telescopic oil cylinder core pipe, in the telescopic process of telescopic oil cylinder, rodless cavity in above-mentioned patent documentation
Uncertain with rod chamber pressure, lead to the first accumulator pull pin pressure do not know, thus have impact on reliability of pulling pin.
Content of the invention
In view of this, the present invention proposes a kind of hydraulic control system for single-cylinder bolt type telescopic boom and tool engineering machine
Tool, to provide reliable and stable pressure of pulling pin.
On the one hand, the invention provides a kind of hydraulic control system of single-cylinder bolt, described single-cylinder bolt type telescopic boom bag
Include telescopic arm and telescopic oil cylinder, described hydraulic control system includes：First check valve, balanced valve, the first reversal valve and be used for
First accumulator of pressure of pulling pin is provided for latch；Wherein, the oil-in of described first check valve connects described telescopic oil cylinder
Rod chamber, oil-out connects described first accumulator；Described first reversal valve is arranged on rod chamber and the nothing of described telescopic oil cylinder
On oil circuit between rod cavity and pressure oil-source, described balanced valve be arranged on the rod chamber of described telescopic oil cylinder and rodless cavity with described
On oil circuit between first reversal valve, described hydraulic control system also includes：Relief valve and the first orifice valve, described balanced valve
Control end is passed through described relief valve and is connected fuel tank, and connects the rod chamber of described telescopic oil cylinder by described first orifice valve.
Further, described latch includes cylinder pin and arm pin, and described hydraulic control system also includes cylinder pin oil cylinder, arm pin oil
Cylinder and the second reversal valve, described second reversal valve connects described first accumulator, described cylinder pin oil cylinder, described arm pin oil cylinder respectively
And oil return branch road；Described second reversal valve has three working conditions, the first working condition be connect described first accumulator with
Described cylinder pin oil cylinder and the described arm pin oil cylinder of connection and described oil return branch road, the second working condition is to connect described first accumulator
With described arm pin oil cylinder and connect described cylinder pin oil cylinder and described oil return branch road, the 3rd working condition is to connect described arm pin oil cylinder
And described cylinder pin oil cylinder and described oil return branch road.
Further, described hydraulic control system also includes the 3rd reversal valve；Described 3rd reversal valve is arranged on described
On oil circuit between first accumulator and described first check valve, or, it is arranged on described first check valve and described rod chamber
Between oil circuit on.
Further, described relief valve is 2/2-way valve.
Further, described first reversal valve and described relief valve are electromagnetic valve；Described hydraulic control system also includes：
For sensing the pressure transducer of oil pressure and controller in described first accumulator；Described controller is used for being passed according to described pressure
The sensing result of sensor controls the working condition of described first reversal valve and relief valve.
Further, described first reversal valve, described second reversal valve, described 3rd reversal valve and described relief valve are
Electromagnetic valve；Described hydraulic control system also includes：For sensing the pressure transducer of oil pressure and control in described first accumulator
Device；The sensing result that described controller is used for according to described pressure transducer controls described first reversal valve, described second commutation
The working condition of valve, described 3rd reversal valve and the 4th reversal valve.
Further, described oil return branch road includes the second accumulator, and described second accumulator is low pressure accumulator.
Further, described hydraulic control system also includes the second check valve, and the oil-out of described second check valve is even
Connect described rod chamber, the oil-in of described second check valve connects described second accumulator.
Further, described hydraulic control system also includes the second orifice valve, and described second orifice valve is arranged on described
On oil circuit between first accumulator and described second reversal valve.
On the other hand, the invention provides a kind of engineering machinery, it is provided with single-cylinder bolt type telescopic boom, be additionally provided with setting
There is the hydraulic control system of described single-cylinder bolt.
The hydraulic control system of single-cylinder bolt of the present invention by control the first reversal valve power failure state make rod chamber with
Pressure oil-source connects, and passes through to control relief valve by balanced valve control port off-load, balanced valve is not opened, telescopic oil cylinder no bar simultaneously
Chamber is in blocking, and telescopic oil cylinder keeps in situ, and oil pump gives the first accumulator topping up, topping up mistake by telescopic oil cylinder rod chamber
In journey, telescopic oil cylinder remains stationary as, and is provided that reliable and stable pressure of pulling pin.
Above-mentioned engineering machinery is due to including the hydraulic control system of this single-cylinder bolt, it may have corresponding technique effect.
Brief description
The accompanying drawing constituting the part of the present invention is used for providing a further understanding of the present invention, the schematic reality of the present invention
Apply example and its illustrate, for explaining the present invention, not constituting inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the hydraulic schematic diagram of the hydraulic control system of single-cylinder bolt provided in an embodiment of the present invention.Wherein：1- stretches
Oil cylinder, 2- second reversal valve, 3- second orifice valve, 4- pressure transducer, 5- first accumulator, 6- the 3rd reversal valve, 7- first
Check valve, 8- second check valve, 9- second accumulator, 10- balanced valve, 11- relief valve, 12- first reversal valve, 13- first hinder
Buddhist nun's valve, 14- oil pump.
Specific embodiment
It should be noted that in the case of not conflicting, the embodiment in the present invention and the feature in embodiment can phases
Mutually combine.To describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
Fig. 1 is the hydraulic schematic diagram of the hydraulic control system of single-cylinder bolt provided in an embodiment of the present invention；As shown in figure 1,
The hydraulic control system of the present embodiment single-cylinder bolt can be used for controlling the latch Plug Action of single-cylinder bolt type telescopic boom, and this is stretched
Contracting arm includes basic arm and is sheathed on multiple joint arm (not shown)s and telescopic oil cylinder 1 in basic arm successively, this latch
Arm pin and cylinder pin can be included, the concrete structure of telescopic arm, arm pin and cylinder pin and telescopic oil cylinder 1 etc. and set-up mode can be joined
See the associated description of prior art, here is not reinflated.
The hydraulic control system of the present embodiment can include：For provide for latch pressure of pulling pin the first accumulator 5, the
One check valve 7, balanced valve 10, relief valve 11, the first reversal valve 12 and the first orifice valve 13.Wherein：The oil-feed of the first check valve 7
Mouth connects the rod chamber of telescopic oil cylinder 1, and oil-out connects the first accumulator 5；The oil-in of the first reversal valve 12 is connected to pressure oil
Source (as oil pump 14), oil return opening is connected to oil return circuit (leading to fuel tank), and the first actuator port is connected to the free oil-feed of balanced valve 10
Mouthful, the second actuator port is connected to the rod chamber of telescopic oil cylinder 1；The free oil-out of balanced valve 10 is connected to the no bar of telescopic oil cylinder 1
Chamber, the control port of balanced valve 10 connects fuel tank by relief valve 11, and is connected to telescopic oil cylinder 1 by the first orifice valve 13
Oil circuit between second actuator port of rod chamber and the first reversal valve 12.
In such scheme, rod chamber and the pressure of telescopic oil cylinder 1 can be made by controlling the working condition of the first reversal valve 12
Power oil sources connects, simultaneously can be by controlling relief valve 11 by the control port off-load of balanced valve 10, and now balanced valve 10 does not leave
Open (being that its free oil-out to free oil-in fails to form path), the rodless cavity of telescopic oil cylinder 1 is in blocking, stretches
Oil cylinder 1 keeps in situ, and oil sources gives the first accumulator 5 topping up by telescopic oil cylinder 1 rod chamber, and in filling process, telescopic oil cylinder 1 is protected
Hold motionless, to be provided that reliable and stable pressure of pulling pin.It should be noted that because the rodless cavity of telescopic oil cylinder 1 is load
Side (generally towards above stretching out, the rodless cavity of telescopic oil cylinder 1 is generally in confined state to telescopic arm), using no bar in prior art
When chamber is to the first accumulator topping up, when can lead to pull pin, telescopic arm sinks or falls (rebound phenomenon at least one joint arm),
Single-cylinder bolt may be made cannot to extract because frictional force is excessive, and in the present embodiment, the hydraulic control system of single-cylinder bolt is disobeyed
Bad rodless cavity, to the first accumulator 5 topping up, can be prevented effectively from the problems referred to above.
Specifically, the hydraulic control system single-cylinder bolt of the single-cylinder bolt of above-described embodiment includes being installed on telescopic oil cylinder 1
The fixing cylinder pin oil cylinder 1a of cylinder barrel phase and arm pin oil cylinder 1b.Preferably, this hydraulic control system also includes the second reversal valve 2,
Second reversal valve 2 connects the first accumulator 5, cylinder pin oil cylinder 1a, arm pin oil cylinder 1b and oil return branch road respectively；Second reversal valve 2 has
There are three working conditions, the first working condition is that connection the first accumulator 5 with cylinder pin oil cylinder 1a and connects arm pin oil cylinder 1b and returns
Oily branch road, the second working condition is that connection the first accumulator 5 with arm pin oil cylinder 1b and connects cylinder pin oil cylinder 1a and oil return branch road, the
Three working conditions are connection arm pin oil cylinder 1b and cylinder pin oil cylinder 1a and oil return branch road.Wherein, arm pin oil cylinder 1b (or cylinder pin oil cylinder
1a) connect phase with oil return branch road and should be insert state, when arm pin oil cylinder 1b (or cylinder pin oil cylinder 1a) is connected with the first accumulator 5
Mutually should be the state of extracting.First accumulator 5 and cylinder pin oil cylinder are controlled by second reversal valve 2 with above three working condition
1a and the connected state of arm pin oil cylinder 1b, can be at any time so that arm pin oil cylinder 1b and cylinder pin oil cylinder 1a at least be
(when pulling out cylinder pin oil cylinder 1a, arm pin oil cylinder 1b is first in insert state to be in insert state；When pulling out arm pin oil cylinder 1b, cylinder pin oil cylinder
1a is first in insert state；Cylinder pin oil cylinder 1a and arm pin oil cylinder 1b can be simultaneously in insert state), this kind of situation can be referred to as
Cylinder pin oil cylinder 1a and " interlocking " state of arm pin oil cylinder 1b, can ensure that telescopic arm does not fall, and then avoid peril.
Preferably, the hydraulic control system of single-cylinder bolt also includes the 3rd reversal valve 6；3rd reversal valve 6 is arranged on first
On oil circuit between accumulator 5 and the first check valve 7, or, be arranged on the first check valve 7 and telescopic oil cylinder 1 rod chamber it
Between oil circuit on.When the first accumulator 5 pressure is higher than to pull pin upper pressure limit value, the 3rd reversal valve 6 returns to off-position, permissible
The active of oil sources of pulling pin (i.e. the first accumulator) and telescopic oil cylinder 1 is made to keep apart, as long as there being pressure enough in the first accumulator
The fluid of power, you can carrying out latch and operating mode of pulling pin, non-interference with telescopic oil cylinder motion, that is, in telescopic oil cylinder motor process
In can also there is latch and pull pin operating mode.
As shown in figure 1, specifically, telescopic oil cylinder 1 can be single-piston rod two-way cylinder, and cylinder pin oil cylinder 1a and arm pin are oily
Cylinder 1b belongs to one-way cylinder, retracts during rod chamber oil-feed, spring reset during rod chamber oil return；Second reversal valve 2 can be
Three-position four-way valve, Median Function is Y type, and including oil inlet P, oil return inlet T and actuator port A and actuator port B, second changes
First accumulator 5 can be connected by the second orifice valve 3 to valve 2 oil inlet P, meanwhile, oil inlet P can pass through the second orifice valve
3rd, the 3rd reversal valve 6 connects the first check valve 7 oil-out it is possible to connect flexible oil by described first check valve 7 oil-in
Cylinder 1 rod chamber；Second reversal valve 2 oil return inlet T connects the second accumulator 9 and the second check valve 8 oil-in on oil return branch road, and
Telescopic oil cylinder 1 rod chamber is connected by the second check valve 8 oil-out；Second reversal valve 2 actuator port A and actuator port B is respectively
Connect cylinder pin oil cylinder 1a and arm pin oil cylinder 1b of telescopic oil cylinder 1；3rd reversal valve 6 can be using common on-off valve, such as two
Two-way switch valve；Relief valve 11 (the 4th reversal valve) is accomplished that unloading function, can be realized using various types of reversal valves,
As two position two-way valve etc., the first reversal valve 12 can adopt three position four-way directional control valve, and Median Function is Y type；First reversal valve 12
Oil-in connects oil pump 14, and the first reversal valve 12 oil return opening connects fuel tank.
It should be noted that above-mentioned the second orifice valve being arranged on oil circuit between the first accumulator 5 and the second reversal valve 2
3 play reduction pulls pin percussion, is preferred version.Meanwhile, above-mentioned second check valve 8 can play isolation rod chamber and be likely to occur
Pressure oil effect, be preferred version.Second accumulator 9 can be low pressure accumulator.
In specific implementation process, for the ease of controlling, reduce time lag, the first reversal valve 12 and relief valve 11 can be using electricity
Magnet valve, on this basis it is preferable that the hydraulic control system of single-cylinder bolt also includes：For sensing oil pressure in the first accumulator 5
Pressure transducer 4 and controller (not shown)；The sensing result that controller is used for according to pressure transducer 4 controls first
The working condition (obtaining electricity condition or power failure state) of reversal valve 12 and relief valve 11, you can realize to according in the first accumulator 5
Oil pressure automatic liquid feeding is carried out to the first accumulator 5.Further, the second reversal valve 2, the 3rd reversal valve can also adopt electromagnetism
Valve, on this basis it is preferable that controller be additionally operable to according to the sensing result of pressure transducer 4 control the first reversal valve 12, the
The working condition (obtaining electric or power failure state) of two reversal valves 2, the 3rd reversal valve 6 and the 4th reversal valve, to realize to the first accumulation of energy
Device 5 carries out automatic liquid feeding, and concrete control process may refer to retouching of the following hydraulic control system operation principle to single-cylinder bolt
State.
The hydraulic control system operation principle of above-mentioned single-cylinder bolt is summarized as follows：
First accumulator 5 filling process is：The first accumulator 5 pressure detecting when pressure transducer 4 is less than default
During low pressure limit value of pulling pin, the second reversal valve 2 is in middle position, and the 3rd reversal valve 6 and relief valve 11 are in communicating position, and first
Reversal valve 12 is in left position；Now, oil pump 14 connects telescopic oil cylinder 1 rod chamber by the first reversal valve 12, and by flexible oil
Cylinder 1 rod chamber, the first check valve 7, and the 3rd reversal valve 6 connection the first accumulator 5；Because balanced valve 10 is controlled by relief valve 11
Liquefaction mouth off-load, balanced valve 10 is not opened, and therefore, telescopic oil cylinder 1 rodless cavity is in blocking, telescopic oil cylinder 1 cannot action,
Keep in situ, oil pump 14 is carried out through the first check valve 7 and the 3rd reversal valve 6 by telescopic oil cylinder 1 rod chamber to the first accumulator 5
Topping up, when the first accumulator 5 pressure that pressure transducer 4 detects be higher than default pull pin upper pressure limit value when, controller control
Make the 3rd reversal valve 6 and return to off-position, the first reversal valve 12 returns to middle position simultaneously, the first accumulator 5 stops topping up；By above-mentioned
Description understands, pressure transducer 4, the first accumulator 5, the 3rd reversal valve 6, the first check valve 7, relief valve 11, the first orifice valve
13 and first reversal valve 12 together form an accumulator automatic liquid feeding loop；Concrete control logic is (following as shown in table 1
In table, " " represents dead electricity, "+" represent electric)：
Table 1
| Operating mode | DT1 | DT2 | DT3 | DT4 | DT5 | DT6 |
| Accumulator topping up | — | — | + | — | + | — |
Pulling out cylinder pin process is：When second reversal valve 2 is in left position, the first accumulator 5 connects second by the second orifice valve 3
Reversal valve 2 oil inlet P, and the cylinder pin oil cylinder 1a of telescopic oil cylinder 1 is connected by the second reversal valve 2, so that cylinder pin oil cylinder 1a contracting
Return, meanwhile, the arm pin oil cylinder 1b fluid of telescopic oil cylinder 1 returns to the second accumulator 9 by the second reversal valve 2, and single by second
Connect telescopic oil cylinder 1 rod chamber to valve 8；Therefore, arm pin oil cylinder 1b is in insert state under spring force and pulls out arm pin process
For：When second reversal valve 2 is in right position, the first accumulator 5 connects the second reversal valve 2 oil inlet P by the second orifice valve 3, and
Connect arm pin oil cylinder 1b of telescopic oil cylinder 1 by the second reversal valve 2, so that arm pin oil cylinder 1b is retracted, meanwhile, telescopic oil cylinder 1
Cylinder pin oil cylinder 1a fluid the second accumulator 9 is returned to by the second reversal valve 2, and by the second check valve 8 connect telescopic oil cylinder 1
Rod chamber, now, cylinder pin oil cylinder 1a is in insert state under spring force；Additionally, when the second reversal valve 2 is in middle position,
The cylinder pin oil cylinder 1a of telescopic oil cylinder 1 and arm pin oil cylinder 1b fluid return to the second accumulator 9 by the second reversal valve 2, and by the
Two check valve 8 connects telescopic oil cylinder 1 rod chamber.Now, cylinder pin oil cylinder 1a and arm pin oil cylinder 1b under spring force, are in
Insert state；Second accumulator 9 belongs to low pressure accumulator, plays buffering and the effect of temporary fluid, prevents telescopic oil cylinder 1 from having bar
The latch situation not in place that cavity pressure leads to；Seen from the above description, the second reversal valve 2 is used for cylinder pin oil cylinder 1a and arm pin oil cylinder
The control of pulling pin of 1b, is only in default upper pressure limit value of pulling pin in the first accumulator 5 pressure that pressure transducer 4 detects
When and lower limit between, the second reversal valve 2 could be allowed to carry out control of pulling pin, three working conditions of the second reversal valve 2 are realized
Cylinder pin oil cylinder 1a and arm pin oil cylinder 1b at least are in insert state (" interlocking " control), concrete control logic such as table
Shown in 2：
Table 2
| Operating mode | DT1 | DT2 | DT3 | DT4 | DT5 | DT6 |
| Pull out cylinder pin | + | — | — | — | — | — |
| Pull out arm pin | — | + | — | — | — | — |
| Insertion | — | — | — | — | — | — |
Additionally, the expanding-contracting action that the first reversal valve 12 is used for telescopic oil cylinder 1 controls, concrete control logic is as shown in table 3：
Table 3
| Operating mode | DT3 | DT4 | DT5 | DT6 |
| Stretch oil cylinder | — | + | — | + |
| Contracting oil cylinder | — | + | + | — |
The present embodiment carries out automatic liquid feeding using rod chamber oil circuit to the first accumulator, and control of realizing pulling pin, in topping up mistake
In journey, telescopic oil cylinder remains stationary as, and effectively prevent prior art in telescopic oil cylinder action, and load pressure does not know to lead to
Pull pin unreliable problem, there is provided reliable and stable oil sources of pulling pin, thus improve the reliability of cylinder arm pin action；Additionally, adopting
Use the second reversal valve, its three kinds of working conditions ensure that cylinder pin and arm pin at least is in insert state it is achieved that cylinder pin
Action and the interlocking of arm pin action, improve safety of pulling pin；By pressure transducer real-time monitoring first energy storage pressure, and
By controlling the on off operating mode controlling the 3rd reversal valve according to monitoring result, thus oil sources of pulling pin (i.e. the first accumulator) with flexible
Oil cylinder is actively made to keep apart, as long as there being the fluid of enough pressure in the first accumulator, also may be used in telescopic oil cylinder motor process
There is latch and operating mode of pulling pin.
Other embodiments of the invention additionally provide a kind of engineering machinery, and are provided with the hydraulic control system of above-mentioned single-cylinder bolt
System.Specifically, this engineering machinery can include but is not limited to crane.This engineering machinery is due to including the liquid of above-mentioned single-cylinder bolt
Pressure control system, it may have corresponding technique effect.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement made etc., should be included within the scope of the present invention.
Claims (9)
1. a kind of hydraulic control system for single-cylinder bolt type telescopic boom, described single-cylinder bolt type telescopic boom include telescopic arm and
Telescopic oil cylinder (1) is it is characterised in that described hydraulic control system includes：First check valve (7), balanced valve (10), the first commutation
Valve (12) and the first accumulator (5) for providing pressure of pulling pin for latch；Wherein, the oil-feed of described first check valve (7)
Mouth connects the rod chamber of described telescopic oil cylinder (1), and oil-out connects described first accumulator (5)；Described first reversal valve (12)
It is arranged on the oil circuit between the rod chamber of described telescopic oil cylinder (1) and rodless cavity and pressure oil-source, described balanced valve (10) sets
Put on the oil circuit between the rod chamber and rodless cavity and described first reversal valve (12) of described telescopic oil cylinder (1)；Described hydraulic pressure
Control system also includes：Relief valve (11) and the first orifice valve (13), the control end of described balanced valve (10) is by described pressure release
Valve (11) connects fuel tank, and connects the rod chamber of described telescopic oil cylinder (1) by described first orifice valve (13)；Described latch bag
Include cylinder pin and arm pin, described hydraulic control system also includes cylinder pin oil cylinder (1a), arm pin oil cylinder (1b) and the second reversal valve (2),
Described second reversal valve (2) connects described first accumulator (5), described cylinder pin oil cylinder (1a), described arm pin oil cylinder (1b) respectively
And oil return branch road；Described second reversal valve (2) has three working conditions, and the first working condition is to connect described first accumulator
(5) with described cylinder pin oil cylinder (1a) and connect described arm pin oil cylinder (1b) and described oil return branch road, the second working condition is connection
Described first accumulator (5) with described arm pin oil cylinder (1b) and connects described cylinder pin oil cylinder (1a) and described oil return branch road, and the 3rd
Working condition is to connect described arm pin oil cylinder (1b) and described cylinder pin oil cylinder (1a) and described oil return branch road.
2. hydraulic control system according to claim 1 is it is characterised in that also include the 3rd reversal valve (6)；Described 3rd
Reversal valve (6) is arranged on the oil circuit between described first accumulator (5) and described first check valve (7), or, it is arranged on institute
State on the oil circuit between the first check valve (7) and described rod chamber.
3. hydraulic control system according to claim 2 is it is characterised in that described relief valve (11) is 2/2-way valve.
4. the hydraulic control system according to any one of claim 1-3 is it is characterised in that described first reversal valve (12)
It is electromagnetic valve with described relief valve (11)；Described hydraulic control system also includes：For sensing in described first accumulator (5)
The pressure transducer (4) of oil pressure and controller；The sensing result that described controller is used for according to described pressure transducer (4) controls
Described first reversal valve (12) and the working condition of relief valve (11).
5. hydraulic control system according to claim 2 it is characterised in that described first reversal valve (12), described second
Reversal valve (2), described 3rd reversal valve (6) and described relief valve (11) are electromagnetic valve；Described hydraulic control system also includes：
For sensing the pressure transducer (4) of oil pressure and controller in described first accumulator (5)；Described controller is used for according to described
The sensing result of pressure transducer (4) controls described first reversal valve (12), described second reversal valve (2), described 3rd commutation
Valve (6) and the working condition of relief valve (11).
6. the hydraulic control system according to any one of claims 1 to 3 is it is characterised in that described oil return branch road includes
Two accumulators (9), described second accumulator (9) is low pressure accumulator.
7. the hydraulic control system according to claim 6 is it is characterised in that also include the second check valve (8), and described
The oil-out of two check valves (8) connects described rod chamber, and the oil-in of described second check valve (8) connects described second accumulator
(9).
8. the hydraulic control system according to claim 7 is it is characterised in that also include the second orifice valve (3), and described
Two orifice valves (3) are arranged on the oil circuit between described first accumulator (5) and described second reversal valve (2).
9. a kind of engineering machinery, is provided with single-cylinder bolt type telescopic boom and appoints it is characterised in that being additionally provided with claim 1-8
Hydraulic control system described in one.
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| CN201410833900.4A CN104591012B (en) | 2014-12-29 | 2014-12-29 | Hydraulic control system for single cylinder pin type telescopic boom and engineering machinery |
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| CN201410833900.4A CN104591012B (en) | 2014-12-29 | 2014-12-29 | Hydraulic control system for single cylinder pin type telescopic boom and engineering machinery |
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| CN104591012B true CN104591012B (en) | 2017-02-08 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104444859B (en) * | 2014-12-10 | 2017-01-04 | 徐州重型机械有限公司 | Single-cylinder bolt oil cylinder anti-leak control method, device and single-cylinder bolt telescopic system |
| JP6476996B2 (en) * | 2015-02-24 | 2019-03-06 | 株式会社タダノ | Telescopic boom telescopic device |
| CN108190748A (en) * | 2018-01-02 | 2018-06-22 | 三汽车起重机械有限公司 | A kind of single-cylinder bolt telescopic system and crane |
| JP2019210071A (en) * | 2018-05-31 | 2019-12-12 | 株式会社タダノ | crane |
| DE102018117630B4 (en) * | 2018-07-20 | 2020-07-09 | Manitowoc Crane Group France Sas | Crane telescope locking device |
| CN110642165B (en) * | 2019-10-11 | 2024-06-18 | 三一汽车起重机械有限公司 | Single-cylinder bolt control system, telescopic arm and crane |
| CN111006856B (en) * | 2019-10-15 | 2022-08-05 | 武汉船用机械有限责任公司 | Test tool for performance of bolt |
| CN110980528A (en) * | 2019-11-19 | 2020-04-10 | 徐州重型机械有限公司 | Novel single-cylinder plug pin type telescopic system and control method |
| CN112173995B (en) * | 2020-09-27 | 2022-07-29 | 徐州徐工液压件有限公司 | Core-tube-free single-drive type telescopic hydraulic cylinder |
| CN113353819B (en) * | 2021-06-09 | 2023-03-21 | 安徽柳工起重机有限公司 | Single-cylinder bolt telescopic hydraulic system and telescopic boom crane |
| CN113896121A (en) * | 2021-10-08 | 2022-01-07 | 徐州重型机械有限公司 | Crane bolt type telescopic system and crane |
| CN114412853B (en) * | 2021-12-31 | 2024-05-14 | 徐州重型机械有限公司 | Double-cylinder head telescopic system and control method |
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| CN104591012A (en) | 2015-05-06 |
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