CN104169525B - Hydraulic circuit for force piece - Google Patents
Hydraulic circuit for force piece Download PDFInfo
- Publication number
- CN104169525B CN104169525B CN201380016356.8A CN201380016356A CN104169525B CN 104169525 B CN104169525 B CN 104169525B CN 201380016356 A CN201380016356 A CN 201380016356A CN 104169525 B CN104169525 B CN 104169525B
- Authority
- CN
- China
- Prior art keywords
- pressure
- work surface
- valve
- valves
- pipeline
- 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.)
- Expired - Fee Related
Links
- 238000005065 mining Methods 0.000 claims abstract description 4
- 238000010992 reflux Methods 0.000 claims description 8
- 238000005086 pumping Methods 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
- E21D23/26—Hydraulic or pneumatic control
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Fluid-Pressure Circuits (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
A kind of hydraulic circuit, it for being used for the force piece in support works face in underground mining by multiple shield supports, it includes pressure transducer (19) at the annular piston pipeline (10) of each cylinder-piston unit (4), via described pressure transducer when reaching default maximum pressure, pressure alarm (28) is issued, no pressure can be converted into by work surface block valve (11), whole work surface by described pressure alarm.Described pressure alarm (28) is relatively for each manipulation nonpassage of signal of one of them hydraulic valve.
Description
Technical field
The present invention relates to a kind of hydraulic circuit, it (screens by suspension device in underground mining
Support) and for force piece.
Background technology
By PCT/DE2010/000685=WO2011006481A2, (right is wanted in this loop
Ask 7) known.Even if it is even if whole at emergency cut-off in the case of pumping unit has fault
Even if can not bear in the case of controller for electric consumption and hydraulic control device and at load support valve
The highest ground pressure in the case of, be also prevented from not by set pressure monitoring device
The running status of prediction, occurs being sufficiently used for hydraulic pressure pre-control, i.e. opening in described running status
The pressure ratio of important valve.
By the design according to claim 7 of WO2011006461A2, each cylinder-
The annular piston pipeline of piston unit monitors also by pressure transducer.By this pressure sensing
Device, when reaching default maximum pressure, whole work surface is switched to no pressure, to such an extent as to
Especially it is no longer able to realize the unblock to the check-valves supporting ground pressure.But it is here, same
Following running status can be caused, need to equipment manually, automatically in described running status
It is controlled.
Summary of the invention
It is an object of the invention to, be so designed that hydraulic circuit to the overall monitor of equipment and
The most necessary intervention to controlling still keeps possibility.
Achieving a solution scheme from a kind of hydraulic circuit, it is for covering by multiple in underground mining
Protecting the support force piece with support works face, the most each shield support is equipped with hydraulic cylinder
-piston unit is for performing the support function of dismounting, stepping, placement, the most each cylinder-work
Plug unit is connected with shield support control valve via openable check-valves and pressure line, and
And pass through shield support according to the default of shield control device being allocated to each shield support
Control valve and can be with backflow in the case of can being connected or open at the same time check-valves with pump line line
Pipeline connects, or can pass through check-valves relative pressure pipeline locking, wherein, and each cylinder-
The annular piston pipeline of piston unit is monitored by pressure transducer, passes via described pressure
Sensor, when reaching default maximum pressure, pressure alarm is issued, by described pressure
Power alarm signal allows hand over into no pressure by the whole work surface of work surface block valve, its feature
It is,
The such locking of manipulation signal of described pressure alarm opposing hydraulic valve so that exist
In the case of one manipulation signal, described pressure alarm is not resulted in the nothing pressure of work surface block valve
Power switches.
The improvement project supplemented is: pressure alarm can be by hand channel by key switch deexcitation
Or pressure transducer can evade, described improvement project is capable of so-called negative urgent
Operation, i.e. when alarm signal can cause setting due to the pressure signal of above-mentioned pressure monitor
For when shutting down, it is possible to realize controlling.
Accompanying drawing explanation
Hereinafter by an embodiment, the present invention is described.At this explicitly with reference to right
Accompanying drawing 1A, 1B of WO2011006461A2 and the accompanying drawing of 2 illustrate and referring especially to Figure 1B
And explanation.
The term used and its reference are included in the application；In the application below to figure
The explanation of 1 is mentioned difference clearly.
Electricity/the hydraulic circuit of the shield support in work surface is according to WO2011006461A2 bag
Containing following element, described element is the most shown in the drawings or indicates:
1. (pipeline assembled by pump to work surface supply line, and forward), it extends face length
A part or whole work surface, and be connected to pumping plant；
2. assembling reflux pipeline (pipeline, backflow are assembled in backflow), it extends face length
A part or whole work surface, and be connected with the tank (Tank) of pumping plant.
3. for saving the hydraulic control device of the shield control device of formula shield support.Illustrate
In applicator 4 one.Hydraulic control device is connected with pipeline forward by forward branch 12,
And be connected with reflux pipeline by return branch 13.
4. applicator, is denoted herein as cylinder piston unit.
5. the controller for electric consumption for manipulating hydraulic control device 3 of shield control device
5.Hydraulic control device 3 and controller for electric consumption 5 collectively form shield support controller, described in cover
Protect bracket controller itself to be established as input switch and control instruction, but its switch and control
Instruction processed also is able to control device 15 from surface and obtains.
In addition the auxiliary valve, the especially check-valves that exist have been not shown.
Detailed description of the invention
Hydraulic control device includes multiple valve.In principle, each applicator gathers with the pump of work surface
The outfan loaded by ground pressure being connected to applicator of manifold line and hydraulic control device
Between end by being configured to the load support valve of openable check-valves 14, so in pump pressure
When power is cancelled or cuts off, the load pressure of applicator is fallen and is sealed on the check-valves closed.When negative
When the pressure differential of lotus pressure and pre-governor pressure is less than the value preset by valve arrangement, this check-valves 14
Can be opened by system pressure by hydraulic pressure pre-control.Check-valves 14 is carried out in a hydrodynamic manner
Switch so that when hydraulic open, the work space of applicator is by outlet and return branch
Assemble pipeline with backflow to be connected.This openable check-valves is such as by DE 38 04 848A1
Open.
Prevented at openable check-valves 14 and cylinder-annular chamber by pressure monitoring device or
Pressure between person's hydraulic control device 3 reaches to cause inadvertently opening up (biasing) and uses
Make the height of the check-valves 14 of load support valve.This is seen WO2011006461A2.
Details sketch according to Fig. 1 illustrates each valve of hydraulic control device 3.
For placing the pilot valve 16.1 of applicator and for removing the pilot valve 16.2 of applicator
Via bus 20 by the controller for electric consumption 5 of shield support or by surface control dress
Put 15 to manipulate via signal line 21 and open the most in a hydrodynamic manner
Close for placing the main valve 17.1 of applicator and for removing the main valve 17.2 of applicator.
By encoding switching signal, the magnet of pilot valve is the most mutually locked:
In the case of hydraulic control (lifting) in placing (setzen) meaning:
Main valve 17.1 open work surface supply line (pump line line, pressure line) 1 with
Connection (forward branch 12 places pipeline 22) between applicator input；
Main valve 17.2 discharges annular chamber to connection (the annular piston pipe assembling reflux pipeline 2
Line 10, return branch 13)；
Promote the piston of applicator 4 and be in load thereon.
Under static state:
Main valve 17.1 terminate in the interface 6 of applicator and work surface supply line (pump line line,
Pressure line) connection connecting and be opened to assemble reflux pipeline 2 between 1；
Main valve 17.2 discharges annular chamber 23 to the connection assembling reflux pipeline 2；
The load being on the piston of applicator check-valves 14/ load support by cut-off
Valve supports.
In the case of hydraulic control in removing meaning (piston decline):
Main valve 17.1 terminate in work surface supply line (pump line line, pressure line) 1 it
Between connect and be opened to assemble reflux pipeline 2 connection；
Main valve 17.2 discharges annular chamber 23 to work surface supply line (pump line line, pressure
Pipeline) 1 connection；
The load being on the piston of applicator check-valves 14/ load support by cut-off
Valve supports, until check-valves 14 passes through the pressure of rising in annular piston pipeline 10 via dividing
Prop up 24 to open；
The load reduction being on the piston of applicator.
Resting state is important state, because this person in work surface, people is due to an erection
Standby less desirable motion and meet with danger.Described danger is kept away by pressure transducer 19
Exempting from, described pressure transducer is linked into the annular piston pipeline 10 of each cylinder-piston unit 4
In.Each described pressure transducer 19 controls dress via another bus 20 via surface
Put 15 and be so switched to work surface shift valve, thus in reaching annular piston pipeline 10
During the maximum pressure preset, whole work surface can be converted to no pressure.Therefore also ensure that: energy
Enough intrinsic pressures realized the check-valves supporting ground pressure is opened no longer exist.Therefore, hold
Permitted maximum pressure significantly, or rather ratio be sufficiently used for opening check-valves such as
Little at least 20% ground of intrinsic pressure of 80bar is such as set as 50bar pressure, allows described
Maximum pressure under all shield supports of work surface be switched to no pressure.
Following running status can also occur certainly now, and it is expectation that control wherein carries out intervention
Or even necessary.Propose for this reason, only do not exist for main valve
Work surface block valve 11 is just blocked during manipulation signal.For this reason, swash via with-link
Live surface control device 15, the only signal at pressure transducer 19 be positive and
Be simultaneously used for manipulating the signal of pilot valve 16.1,16.2 be negative in the case of described and-link
Send positive output signal.Here, it is to be illustrated by negative (not sum-) link 26, described
Negative (not sum-) link is connected with signal line 21 and only in the situation of negative input signal
Lower ability positive output signal is sent to work surface control device 15 and-link 25.With this
It is that have a mind to, by hands or the running status that automatically controls that kind of mode avoids pressure transducer 19 to interfere
Or the motor process of applicator.Such situation can cause again danger.
Moreover, it is proposed that the function of pressure transducer 19 can fail completely.Connect in the line
Enter and control the key switch between device 15 and work surface block valve 11 for this mesh at work surface
's.When inadvertently blocking in the case of whole work surface is less desirable, described key switch can
To disconnect when needed.It is also possible that: evade pressure by the loop being shown without at this
Force transducer.
List of numerals
1 work surface supply line
2 assemble reflux pipeline
3 hydraulic control devices
4 cylinders-piston unit
5 controller for electric consumption
The interface of 6 applicators
10 annular piston pipelines
11 work surface block valves
12 forward branch
13 return branch
14 check-valves
15 surface control device
16 pilot valves
17 main valves
19 pressure transducers
20 buses
21 signal lines
22 place pipeline
23 annular chambers
24 branches
25 and-link
26 negative (not sum-) link
28 pressure alarm
Claims (2)
1. a hydraulic circuit, it is used in underground mining by multiple shield supports to support
The force piece of work surface, the most each shield support is equipped with cylinder-piston unit and uses
In performing the support function of dismounting, stepping, placement, the most each cylinder-piston unit is via can
Check-valves and the pressure line opened and be connected with shield support control valve, and according to being allocated to
Presetting of the shield control device of each shield support can by shield support control valve
Can be connected with reflux pipeline in the case of being connected with pump line line or opening check-valves at the same time, or
Person can pass through check-valves relative pressure pipeline locking,
Wherein, the annular piston pipeline (10) of each cylinder-piston unit (4) is passed by pressure
Sensor (19) is monitored, and via described pressure transducer, is reaching default maximum pressure
Time, pressure alarm (28) is issued, by described pressure alarm by work surface
Block valve (11) whole work surface allows hand over into no pressure,
It is characterized in that,
The such locking of manipulation signal of described pressure alarm (28) opposing hydraulic valve so that
In the case of there is a manipulation signal, described pressure alarm (28) is not resulted in work surface
The no pressure switching of block valve (11).
2. hydraulic circuit as claimed in claim 1, it is characterised in that pressure alarm (28)
Can be able to be evaded by key switch deexcitation or pressure transducer (19) by hand channel.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012003087 | 2012-02-18 | ||
| DE102012003087.8 | 2012-02-18 | ||
| PCT/DE2013/000053 WO2013120474A2 (en) | 2012-02-18 | 2013-01-30 | Hydraulic circuit for longwall support |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104169525A CN104169525A (en) | 2014-11-26 |
| CN104169525B true CN104169525B (en) | 2016-10-12 |
Family
ID=47845675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380016356.8A Expired - Fee Related CN104169525B (en) | 2012-02-18 | 2013-01-30 | Hydraulic circuit for force piece |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN104169525B (en) |
| AU (1) | AU2013220787B2 (en) |
| DE (1) | DE102013001581A1 (en) |
| WO (1) | WO2013120474A2 (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1458672B1 (en) * | 1951-01-28 | 1970-02-26 | Becorit Grubenausbau Gmbh | Control for a migrating hydraulic longwall construction |
| DE1255613B (en) * | 1963-04-22 | 1967-12-07 | Dowty Mining Equipment Ltd | Wandering longwall mining |
| DE1483906A1 (en) * | 1966-09-10 | 1970-07-23 | Konrad Grebe | Wandering longwall mining |
| DE2838374B1 (en) * | 1978-09-02 | 1980-01-10 | Hemscheidt Maschf Hermann | Neighbor control for hydraulic step extension frames |
| DE3128279A1 (en) * | 1981-07-17 | 1983-02-03 | Gewerkschaft Eisenhütte Westfalia, 4670 Lünen | ADJUSTMENT CONTROL FOR A HYDRAULIC STAMP EXTENSION AND HYDRAULICALLY CONTROLLED CHECK VALVE |
| DE3804848A1 (en) | 1988-02-17 | 1989-08-31 | Steinbrueck Peter | Control device for inflatable inlays |
| DE3840478C2 (en) * | 1988-12-01 | 1996-05-15 | Westfalia Becorit Ind Tech | Device for the emergency actuation of hydraulic expansion units for electrohydraulic expansion controls |
| DE102004017712B4 (en) * | 2003-05-14 | 2019-05-09 | Tiefenbach Control Systems Gmbh | Hydraulic control for longwall construction |
| DE112010002945A5 (en) * | 2009-07-16 | 2012-10-25 | Tiefenbach Control Systems Gmbh | Hydraulic circuit for longwall construction |
-
2013
- 2013-01-30 WO PCT/DE2013/000053 patent/WO2013120474A2/en active Application Filing
- 2013-01-30 AU AU2013220787A patent/AU2013220787B2/en not_active Expired - Fee Related
- 2013-01-30 DE DE201310001581 patent/DE102013001581A1/en not_active Withdrawn
- 2013-01-30 CN CN201380016356.8A patent/CN104169525B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013120474A3 (en) | 2014-05-22 |
| CN104169525A (en) | 2014-11-26 |
| WO2013120474A2 (en) | 2013-08-22 |
| AU2013220787A1 (en) | 2014-09-18 |
| AU2013220787B2 (en) | 2016-12-08 |
| DE102013001581A1 (en) | 2013-08-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161012 Termination date: 20180130 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |