CN102330561B - Method for controlling protective plate - Google Patents

Method for controlling protective plate Download PDF

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Publication number
CN102330561B
CN102330561B CN201110182572.2A CN201110182572A CN102330561B CN 102330561 B CN102330561 B CN 102330561B CN 201110182572 A CN201110182572 A CN 201110182572A CN 102330561 B CN102330561 B CN 102330561B
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CN
China
Prior art keywords
pressure
valve
outlet
pressure regulator
cylinder
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Application number
CN201110182572.2A
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Chinese (zh)
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CN102330561A (en
Inventor
马丁·路透
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Marco Systemanalyse und Entwicklung GmbH
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Marco Systemanalyse und Entwicklung GmbH
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Priority to DE102010026977.8A priority Critical patent/DE102010026977B4/en
Priority to DE102010026977.8 priority
Application filed by Marco Systemanalyse und Entwicklung GmbH filed Critical Marco Systemanalyse und Entwicklung GmbH
Publication of CN102330561A publication Critical patent/CN102330561A/en
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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/12Control, e.g. using remote control
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/16Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
    • E21D23/26Hydraulic or pneumatic control

Abstract

The invention relates to a method for controlling a protective plate. Wherein when a cover support is dismounted, the adjacent cover support is pushed away through a split cylinder and a straightening cylinder, wherein the split and the straightening cylinder respectively possesses a pressure adjusting valve.

Description

For controlling the method for backplate
Technical field
The present invention relates to a kind ofly for carry out the method for backplate control at underground mining, wherein shield support is arranged on the division cylinder (Spaltzylinder) in shielding cover plate region and by least one, is arranged on aligning cylinder (Richtzylinder) in shielding slide plate region from pushing open with the contiguous shield support of this shield support when removing by least one.
Background technology
The bottom that division cylinder can be arranged on division cover plate at this, this explosion cover plate can prevent the loosening rubble landing between single backplate or shield support.Meanwhile, such division cylinder is the supporter for adjacent backplate at cover plate place.
At present, division cylinder and aligning cylinder (propulsion plant) are loaded and are supplied with pressure by switch valve.
Summary of the invention
The object of the invention is to, provide a kind of for carry out the method for backplate control at underground mining, utilize the method can be in the exploitation situation tilting with low cost, to provide the safety improving with respect to the upset of adjacent backplate.
This object realizes by feature claimed in claim 1, and particularly realizes thus, divides cylinder and aligning cylinder loads the maximum pressure reducing, and this maximum pressure is derived by pressure duct by each self pressure regulator valve.Therefore divide cylinder and be not only separated from each other ground on-load pressure with aligning cylinder, and can differently regulate respectively the pressure for these two cylinders.In addition, according to the present invention, the maximum pressure reducing does not provide by extra low pressure line, but this pressure is passed through, for division cylinder with for the default pressure regulator valve of aligning cylinder, by the pressure duct being always to provide in work plane, to be derived.
According to the present invention, when low cost, guarantee to select to make backplate to be supported on the power on its adjacent backplate just in time so largely, thereby prevent from the one hand gliding and can not overturning on the other hand.
According to another aspect of the present invention, the present invention relates to that a kind of this pressure regulator valve comprises valve body for implementing the pressure regulator valve of said method, valve body has entrance for high pressure, lead to the outlet of backflow and for the outlet of the fluid pressure that reduces.At this, in valve body, be provided with and loaded adjustable bullet force measurement piston, this measurement piston has in the outlet of the fluid pressure for reducing and leads to passage between the outlet of backflow, that can be sealed by needle.By having loaded adjustable bullet force measurement piston, can select the maximum pressure reducing of expectation, from this value, measurement piston overcomes the power of spring to be opened, so that restriction arrives the hydraulic pressure of the outlet of the fluid pressure for reducing.According to valve of the present invention, can be connected with corresponding return line with existing pressure duct in work plane, wherein in the exit of the fluid pressure for reducing, provide hydraulic pressure, this hydraulic pressure does not surpass the value regulating, the maximum pressure reducing.Can realize thus the maximum pressure reducing that regulates expectation in simple mode, the spring that presses to measurement piston is more or less screwed in valve body.
Favourable embodiment of the present invention is illustrated in manual, accompanying drawing and dependent claims.
Also can be advantageously according to this invention embodiment, by affiliated spring, needle is pressed to the direction of measuring piston, this is because be closed under passive state in the outlet of the fluid pressure for reducing and the passage that leads between the outlet of backflow in this case.
In addition can be advantageously, in valve body, be provided with at the entrance for high pressure with for passage between the outlet of the fluid pressure that reduces, that can be sealed by needle.In this way, when the pressure existing when the exit of the fluid pressure for reducing has met or exceeded the maximum pressure of adjusting, needle can turn-off other tributary of the fluid that under high pressure forms, then seals its fluid.If at the pressure in the exit of the fluid pressure for reducing because outside, act on the power on backplate and raise undesirably, measure so the preregulated power that piston overcomes spring and pushed open by needle, thereby make the outlet that fluid can be by the fluid pressure for reducing and the passage that leads between the outlet of backflow flows out.
Can be advantageously for good and safe mode of operation, spring presses to by measuring piston the block being fixed on housing under passive state.In addition can be advantageously, the second block is set, the motion that piston overcomes elastic force is measured in its restriction, this is because can guarantee in this case, even when violent compression shock, the connecting portion that leads to backflow also remains and opens, and after compression shock, on the position of all parts of valve in its expectation.
According to another implementation of the invention, at least one is resisted against the stop surface that the block of measuring on piston can have spherical designs, this stop surface and spherical opposite face acting in conjunction.In this way, can be to not compensating by applying the upset that accurately axially the spring of the power of sensing causes.
By the same token can be advantageously, spring is realized in the coupling of measuring on piston by spherical.Therefore the special coefficient spring base of spherical with measuring piston for example can be set.At this spring base, can design like this, i.e. contact between spring base and measurement piston contacts to realize along spherical mating face or by approximate straight line.
Accompanying drawing explanation
According to favourable embodiment and with reference to accompanying drawing is pure the present invention is exemplarily described below.Shown in figure:
Fig. 1 is the cross section through pressure regulator valve;
Fig. 2 is the partial enlarged drawing of Fig. 1 middle section;
Fig. 3 is the hydraulic solution with three division cylinders and an aligning cylinder; With
Fig. 4 is the hydraulic solution of another embodiment with the automatic control equipment of pressure regulator valve.
The specific embodiment
Fig. 1 shows the sectional view through pressure regulator valve, and this pressure regulator valve comprises valve body 10, and valve body has entrance 11 for high pressure P, lead to the outlet 14 of backflow R and for the outlet 12 of the fluid pressure A that reduces.At this, entrance 11 is connected on existing, the feed-in pipe with high pressure P in work plane, and exports 14 and be connected on corresponding return duct R.Outlet 12 for the fluid pressure A that reduces can be connected to division cylinder or aligning cylinder.
As illustrated in fig. 1 and 2, spring housing 16 is screwed in the central hole sealing by sealing ring of valve body 10, in this spring housing, held helical spring 17, this helical spring free end is pressed on the flange 18 of measuring piston 20, and its flange 18 is resisted against the bottom of spiral insertion section 22 under the state with no pressure illustrating.Spiral insertion section 22 has the cross section of classification and is screwed into hermetically in the axial through bore of valve body 10.At 22 center, spiral insertion section, be provided with central hole, measure piston 20 and insert hermetically in this perforation.
Measure piston 20 and import hermetically 22 inside, spiral insertion section, and there is central blind hole 24, this blind hole formed the outlet 12 of the fluid pressure A for reducing and lead to passage 24 between the outlet 14 of backflow R '.On right part blind hole 24, in figure, the cross-perforating crossing with it 26 has been installed, this cross-perforating forms hole 24 to connecting portions of outlet 14.
Passage 24 in graduated cylinder 20 ' can, by valve cone 30 sealings of needle 32, wherein by spring 34, needle 32 be pressed to and measure the direction of piston 20 or the direction of seal receptacle 28 in the region of seal receptacle 28.Spring 34 is placed in the blind hole of another spiral insertion section 36, and this spiral insertion section is screwed in valve body 10.Left part needle 32, in figure also imports in this blind hole movably.
In valve body 10, more accurately say in right part spiral insertion section 36, in the drawings and be furnished with another seal receptacle 38, utilize this another seal receptacle can be enclosed in for the entrance 11 of high pressure P with for the passage 39 between the outlet 12 of the fluid pressure A that reduces.Be molded over another valve cone 40 on needle 32 for sealing.
As especially shown in figure 2, under (illustrating) state with no pressure, be arranged in the seal receptacle 38 in the passage 39 of valve body 10 and be arranged in measure the passage 24 of piston 20 ' in seal receptacle 28 between axial spacing be less than the axial spacing between the affiliated valve cone 40 and 30 on needle 32.Can under state with no pressure, guarantee that in this way valve cone 40 is not resisted against on seal receptacle 38, thereby exist to flow at feed-in mouth P with between for the interface 12 of the fluid pressure A that reduces, connect.Under this state, passage 20 is by being resisted against valve cone 30 sealings on valve seat 28 simultaneously.
When supplying with pressure P and be about 300bar, by spring housing 16 is screwed in valve body 10 more or less, can about 15 to about 250bar very on a large scale in be adjusted in the output pressure that interface 12 places of the fluid pressure A for reducing form.Can change thus and make spring 17 press to the power of measuring piston 20.
Normally in service, the valve illustrating is by interface 11 supply high pressure P, and first hydraulic fluid flows to the outlet 12 of the fluid pressure A for reducing by the passage 39 in seal receptacle 38.Meanwhile, utilize this pressure to be pressed onto and measure on piston 20, by spring 17, make to measure piston and remain in its position.When the pressure existing reaches the power corresponding to the elastic force regulating, the measurement piston 20 in Fig. 2 moves right so, and wherein needle 32 is because the power of spring 34 moves right until valve cone 40 is resisted against on seal receptacle 38 and closed channel 39 simultaneously.In this state, the connection between P and A is closed, and interface 12 places have applied the maximum pressure regulating, and this maximum pressure reduces with respect to supplying with pressure P.If but the pressure that is applied to interface 12 places is because of external force continuation rising, making so to measure the power that piston 20 overcomes Fig. 1 medi-spring 17 moves right, thereby the measurement piston 20 in the region of lifting seal receptacle 28 by valve cone 30 is also opened the connecting portion that leads to backflow R, thereby can make pressure fluid flow go out and make pressure again be down to presetting pressure.
By using two above-mentioned pressure regulator valves, can make to divide cylinder and align the maximum pressure that cylinder loading reduces, wherein this maximum pressure reducing is derived by pressure duct P by pressure regulator valve respectively.By using two pressure regulator valves that separate can regulate dividually the maximum pressure for each cylinder.
Fig. 3 shows a kind of hydraulic solution, and wherein above-mentioned pressure regulator valve is used for dividing cylinder S and aligning cylinder Z.The piston area of cylinder respectively the interface A and pressure regulator valve by the maximum pressure for reducing any be connected.The ring surface of each cylinder is connected with backflow R.At pressure regulator valve, for aligning the return line of cylinder Z, be furnished with the flap valve 50 of the function separation that makes two pressure regulator valves.
At the valve shown in module 60, be different control valves, for the like of plunger for example, upset cover plate or affiliated shield support.In addition, by two valves that illustrate, to pressure regulator valve 52 and 54, supply high pressure.
Figure shown in Figure 4 illustrates two pressure regulator valves 52 and 54 of controlling by hydraulic pressure logic device again.In this embodiment, by removing shield support, automatically open the function for handling aligning cylinder Z and division cylinder S, and by setting, again close this function.If remove two plungers 56 and 58, make the piston area interface of plunger 56 and 58 by means of the valve being arranged in module 60, as illustratedly be connected with refluxing, thereby 2/2 reversal valve 62 that makes to be connected to before pressure regulator valve 52 and 54 is opened, and pressure regulator valve 52 is connected with pressure duct P with 54 high voltage interface 11.On the contrary, if two plungers 56 and 58 are set again, the piston area of plunger has loaded high pressure so, thereby makes valve 62 sealings, and thus pressure regulator valve 52 and 54 is separated with high voltage supply device.
Above-mentioned pressure regulator valve has scale on the external diameter of shaped spiral housing 16, and this scale can represent the pressure regulating.According to the situation of entering, be sideways pitch, depth of stratum, the weight of shield support, its center of gravity and can calculate pressure according to the area of the cylinder of division cover plate, division cover plate or one or more division cylinder should utilize this pressure support on adjacent backplate.In addition the suspension that can calculate backplate drives, and the support force of division cover plate can reduce thus, and can calculate for preventing that backplate pedestal from gliding and necessary pressure according to the area of the power of remaining necessity and aligning cylinder.

Claims (4)

1. a pressure regulator valve, comprise valve body (10), described valve body has for the entrance of high pressure (P) (11), lead to the outlet (14) of backflow (R) and for the outlet (12) of the fluid pressure (A) that reduces, wherein in described valve body (10), be provided with the measurement piston (20) that has loaded adjustable elastic force (17), described measurement piston have the described outlet (12) of the described fluid pressure (A) for reducing and described in lead between the outlet (14) of backflow (R), can be by the passage (24 ') of needle (32) sealing, wherein, in described valve body (10), be provided with at the described entrance for high pressure (P) (11) with between the described outlet (12) of the described fluid pressure (A) that reduces, can be by the passage (39) of described needle (32) sealing, in the described passage (39) of described valve body (10) and in the described passage (24 ') of described measurement piston (20), be furnished with respectively seal receptacle (38, 28), wherein under passive state, two described seal receptacles (38, 28) axial spacing between is less than the corresponding valve cone (40 on described needle (32), 30) axial spacing between.
2. pressure regulator valve according to claim 1, is characterized in that, by spring (34), described needle (32) is pressed to the direction of described measurement piston (20).
3. one kind for carrying out the method for backplate control at underground mining, wherein shield support is arranged on the division cylinder (S) in shielding cover plate region and by least one, is arranged on aligning cylinder (Z) in shielding slide plate region from pushing open with the contiguous shield support of described shield support when removing by least one, wherein said division cylinder and described aligning cylinder load the maximum pressure reducing, described maximum pressure is derived by pressure duct (P) by each self pressure regulator valve, wherein, described pressure regulator valve is designed to according to the pressure regulator valve described in any one in claim 1 and 2.
4. method according to claim 3, is characterized in that, is the maximum pressure of two described pressure regulator valves of described pressure regulator valve separate regulation.
CN201110182572.2A 2010-07-13 2011-06-30 Method for controlling protective plate Active CN102330561B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE102010026977.8A DE102010026977B4 (en) 2010-07-13 2010-07-13 Method for shield control
DE102010026977.8 2010-07-13

Publications (2)

Publication Number Publication Date
CN102330561A CN102330561A (en) 2012-01-25
CN102330561B true CN102330561B (en) 2014-03-12

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CN201110182572.2A Active CN102330561B (en) 2010-07-13 2011-06-30 Method for controlling protective plate

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CN (1) CN102330561B (en)
DE (1) DE102010026977B4 (en)
PL (1) PL213628B1 (en)
RU (1) RU2477797C1 (en)
UA (2) UA101865C2 (en)

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DE102015105922A1 (en) * 2015-04-17 2016-10-20 Marco Systemanalyse Und Entwicklung Gmbh valve assembly
AU2016280009A1 (en) * 2015-06-15 2017-12-21 Joy Global Underground Mining Llc Systems and methods for monitoring longwall mine roof stability
CN108026834B (en) * 2015-06-18 2020-07-24 Avl 里斯脱有限公司 Length-adjustable connecting rod
CN108603438A (en) 2015-12-14 2018-09-28 Avl 里斯脱有限公司 The connecting rod of the adjustable in length of switching valve with Electromagnetically activatable
AT517511A1 (en) 2015-08-10 2017-02-15 Avl List Gmbh Lifting machine, in particular fuel power machine
AT519011B1 (en) 2016-05-31 2018-03-15 Avl List Gmbh reciprocating engine
DE102016008306A1 (en) 2016-07-06 2018-01-11 Avl List Gmbh Connecting rod with adjustable connecting rod length

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Publication number Publication date
DE102010026977B4 (en) 2016-06-02
CN102330561A (en) 2012-01-25
DE102010026977A1 (en) 2012-01-19
RU2477797C1 (en) 2013-03-20
UA101865C2 (en) 2013-05-13
PL395638A1 (en) 2012-01-16
RU2011128978A (en) 2013-01-20
PL213628B1 (en) 2013-04-30
UA106290C2 (en) 2014-08-11

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