CN101845957A - Triple retractable column and hydraulic bracket - Google Patents

Triple retractable column and hydraulic bracket Download PDF

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Publication number
CN101845957A
CN101845957A CN 201010172435 CN201010172435A CN101845957A CN 101845957 A CN101845957 A CN 101845957A CN 201010172435 CN201010172435 CN 201010172435 CN 201010172435 A CN201010172435 A CN 201010172435A CN 101845957 A CN101845957 A CN 101845957A
Authority
CN
China
Prior art keywords
cylinder
stage
column
level
cavity
Prior art date
Application number
CN 201010172435
Other languages
Chinese (zh)
Inventor
黄友贤
王建
刘国柱
张守祥
杜桂丽
Original Assignee
中煤北京煤矿机械有限责任公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 中煤北京煤矿机械有限责任公司 filed Critical 中煤北京煤矿机械有限责任公司
Priority to CN 201010172435 priority Critical patent/CN101845957A/en
Publication of CN101845957A publication Critical patent/CN101845957A/en

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Abstract

The invention discloses a triple retractable column and a hydraulic bracket. The triple retractable column comprises an external cylinder body, wherein a first-stage middle cylinder is arranged in the external cylinder body, a second-stage middle cylinder is arranged in the first-stage middle cylinder, and a plunger is arranged in the second-stage middle cylinder; the external cylinder body is provided with an upper cavity oil port and a lower cavity oil part; the bottom wall of the first-stage middle cylinder is provided with a first bottom valve; the bottom wall of the second-stage middle cylinder is provided with a second bottom valve; the side wall of the first-stage middle cylinder is provided with a first oil hole which causes the upper cavity of the external cylinder body to be communicated with the upper cavity of the first-stage middle cylinder; and the side wall of the second-stage middle cylinder is provided with a second oil hole which causes the upper cavity of the first-stage middle cylinder to be communicated with the upper cavity of the second-stage middle cylinder. The invention can satisfy the requirement of large magnification ratio of the hydraulic bracket, ensures same thrust of each working cavity and has simple structure.

Description

Triple retractable column and hydraulic support
Technical field
The present invention relates to a kind of support apparatus in coal mine, relate in particular to a kind of triple retractable column and hydraulic support.
Background technology
In process of coal mining, because the variation of geological conditions, the coal seam excursion is big, thereby requires hydraulic support to have the big situation of magnification, and promptly the minimum altitude of support and maximum height excursion are bigger.But under the actual conditions, no matter adopt single telescopic band mechanical extension bar pattern still to adopt two flexible patterns, can not meet the demands.
As shown in Figure 1, in the prior art, the support big to the supporting height excursion is when adopting single flexible machinery lengthening or double-telescopic upright post to be difficult to realize that its height change requires, general employing adds the mode of cap 3 on the post 1 of living, and connects by the fraising 2 of the column end of living.
There is following shortcoming at least in above-mentioned prior art:
Safety is relatively poor, and also needs certain space to preserve cap;
In addition, as shown in Figure 2, when the fraising 2 of column column cap is blind hole 4, can't adopt cap 3 to carry out the machinery lengthening.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can satisfy hydraulic support and have the big requirement of magnification, triple retractable column and hydraulic support simple in structure.
The objective of the invention is to be achieved through the following technical solutions:
Triple retractable column of the present invention comprises outer cylinder body, is provided with cylinder in the one-level in the described outer cylinder body, is provided with cylinder in the secondary in the described one-level in the cylinder, is provided with post alive in the described secondary in the cylinder;
Described outer cylinder body is provided with epicoele hydraulic fluid port and cavity of resorption hydraulic fluid port;
The diapire of cylinder is provided with first bottom valve in the described one-level, and the diapire of cylinder is provided with second bottom valve in the described secondary;
The sidewall of cylinder is provided with first oilhole that the epicoele that makes outer cylinder body communicates with the epicoele of cylinder in the one-level in the described one-level;
The sidewall of cylinder is provided with second oilhole that the epicoele that makes cylinder in the one-level communicates with the epicoele of cylinder in the secondary in the described secondary.
Hydraulic support of the present invention comprises column, and described column is above-mentioned triple retractable column.
As seen from the above technical solution provided by the invention, triple retractable column of the present invention and hydraulic support, owing to adopt in the one-level in cylinder, the secondary cylinder and three grades on the post of living flexible, and adopt the interior oil-feed structure of Double bottom valve, two oilholes.Can either satisfy hydraulic support and have the big requirement of magnification, can guarantee that again the thrust of each working chamber is identical, and simple in structure.
Description of drawings
Fig. 1 is the structural representation one of column of the prior art;
Fig. 2 is the structural representation two of column of the prior art;
Fig. 3 is the structural representation of triple retractable column of the present invention.
The specific embodiment
Triple retractable column of the present invention, its preferable specific embodiment comprises outer cylinder body 11 as shown in Figure 3, is provided with cylinder 12 in the one-level in the outer cylinder body 11, cylinder interior 12 is provided with cylinder 13 in the secondary in the one-level, is provided with post 14 alive in the secondary in the cylinder;
Outer cylinder body is provided with epicoele hydraulic fluid port B and cavity of resorption hydraulic fluid port A; The diapire of cylinder 12 is provided with first bottom valve 15 in the one-level, and the diapire of cylinder 13 is provided with second bottom valve 16 in the secondary; The sidewall of cylinder 12 is provided with first oilhole 17 that the epicoele that makes outer cylinder body 11 communicates with the epicoele of cylinder 12 in the one-level in the one-level; The sidewall of cylinder 13 is provided with second oilhole 18 that the epicoele that makes cylinder 12 in the one-level communicates with the epicoele of cylinder 13 in the secondary in the secondary.
Hydraulic support of the present invention, its preferable specific embodiment comprises column, described column is above-mentioned triple retractable column.The specification of outer cylinder body 11 internal diameters of triple retractable column can be decided as required, as long as select suitable cylinder, post footpath ratio.
Among the present invention, cylinder adopts the Double bottom valve arrangement in the I and II, can guarantee that the thrust of each working chamber is identical; Feed liquor mode in cylinder all adopts in the I and II does not design and into returns the liquid joint, need not connect sebific duct in addition, and post moves back and forth with living, the column front is arrived in the sebific duct swelling to avoid sebific duct, not only takes up space but also not attractive in appearance.
Operating principle of the present invention is:
1, when cavity of resorption hydraulic fluid port A feed liquor, when epicoele hydraulic fluid port B returns liquid, liquid enters the column cavity of resorption, promotes in the one-level that cylinder and the post of living move together in the related secondary of cylinder, when cylinder reaches the limit in the one-level, first bottom valve is opened, the related post alive of cylinder moves together in the liquid promotion secondary, and when cylinder reached the limit in the secondary, second bottom valve was opened, liquid promotes post motion alive, and column is finished the setting prop process.
2, when epicoele hydraulic fluid port B feed liquor, when cavity of resorption hydraulic fluid port A returns liquid, liquid enters the column epicoele, first bottom valve, second bottom valve are closed condition, liquid promotes in the one-level in the related secondary of cylinder cylinder and the post of living and regains together, when cylinder was reduced to the limit in the one-level, first bottom valve was opened, and the related post alive of cylinder is regained together in the liquid promotion secondary; When cylinder was reduced to the limit in the secondary, second bottom valve was opened, and liquid promotes post alive and regains, and column is finished the post process of falling.
The above; only for the preferable specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.

Claims (2)

1. a triple retractable column comprises outer cylinder body, it is characterized in that, is provided with cylinder in the one-level in the described outer cylinder body, is provided with cylinder in the secondary in the described one-level in the cylinder, is provided with post alive in the described secondary in the cylinder;
Described outer cylinder body is provided with epicoele hydraulic fluid port and cavity of resorption hydraulic fluid port;
The diapire of cylinder is provided with first bottom valve in the described one-level, and the diapire of cylinder is provided with second bottom valve in the described secondary;
The sidewall of cylinder is provided with first oilhole that the epicoele that makes outer cylinder body communicates with the epicoele of cylinder in the one-level in the described one-level;
The sidewall of cylinder is provided with second oilhole that the epicoele that makes cylinder in the one-level communicates with the epicoele of cylinder in the secondary in the described secondary.
2. a hydraulic support comprises column, it is characterized in that, described column is the described triple retractable column of claim 1.
CN 201010172435 2010-05-10 2010-05-10 Triple retractable column and hydraulic bracket CN101845957A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201010172435 CN101845957A (en) 2010-05-10 2010-05-10 Triple retractable column and hydraulic bracket

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201010172435 CN101845957A (en) 2010-05-10 2010-05-10 Triple retractable column and hydraulic bracket

Publications (1)

Publication Number Publication Date
CN101845957A true CN101845957A (en) 2010-09-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201010172435 CN101845957A (en) 2010-05-10 2010-05-10 Triple retractable column and hydraulic bracket

Country Status (1)

Country Link
CN (1) CN101845957A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102536274A (en) * 2012-01-10 2012-07-04 中煤北京煤矿机械有限责任公司 Equipressure double-telescopic prop
CN103410534A (en) * 2013-08-29 2013-11-27 郑州煤矿机械集团股份有限公司 Triple telescopic column for hydraulic support
CN109931083A (en) * 2019-03-15 2019-06-25 天地科技股份有限公司 A kind of triple retractable column with two levels of support function

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2176846A (en) * 1985-06-19 1987-01-07 Kloeckner Becorit Gmbh Three part telescopic prop
DE4401480A1 (en) * 1993-07-14 1995-07-27 Vos Richard Grubenausbau Gmbh Mine support prop with integral pressure limiting value sleeve
CN2667162Y (en) * 2003-12-04 2004-12-29 中国矿业大学 Double-telescopic hydraulic monomer prop
CN2874024Y (en) * 2005-10-31 2007-02-28 中国矿业大学 Double telescopic suspension hydraulic pillar
CN201050376Y (en) * 2007-07-05 2008-04-23 中煤北京煤矿机械有限责任公司 Double-extension vertical prop
CN201297178Y (en) * 2008-10-07 2009-08-26 七台河祥瑞矿山机械设备制造有限公司 Dual-telescopic protective suspension single hydraulic prop
CN201310364Y (en) * 2008-12-16 2009-09-16 郑州煤矿机械集团股份有限公司 Rapid feed-return liquor shock resistance double-telescopic prop of hydraulic support
CN201358797Y (en) * 2009-03-16 2009-12-09 徐州盛高矿山机械制造有限公司 Double telescoping type suspension air-permeable individual hydraulic prop

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2176846A (en) * 1985-06-19 1987-01-07 Kloeckner Becorit Gmbh Three part telescopic prop
DE4401480A1 (en) * 1993-07-14 1995-07-27 Vos Richard Grubenausbau Gmbh Mine support prop with integral pressure limiting value sleeve
CN2667162Y (en) * 2003-12-04 2004-12-29 中国矿业大学 Double-telescopic hydraulic monomer prop
CN2874024Y (en) * 2005-10-31 2007-02-28 中国矿业大学 Double telescopic suspension hydraulic pillar
CN201050376Y (en) * 2007-07-05 2008-04-23 中煤北京煤矿机械有限责任公司 Double-extension vertical prop
CN201297178Y (en) * 2008-10-07 2009-08-26 七台河祥瑞矿山机械设备制造有限公司 Dual-telescopic protective suspension single hydraulic prop
CN201310364Y (en) * 2008-12-16 2009-09-16 郑州煤矿机械集团股份有限公司 Rapid feed-return liquor shock resistance double-telescopic prop of hydraulic support
CN201358797Y (en) * 2009-03-16 2009-12-09 徐州盛高矿山机械制造有限公司 Double telescoping type suspension air-permeable individual hydraulic prop

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102536274A (en) * 2012-01-10 2012-07-04 中煤北京煤矿机械有限责任公司 Equipressure double-telescopic prop
CN103410534A (en) * 2013-08-29 2013-11-27 郑州煤矿机械集团股份有限公司 Triple telescopic column for hydraulic support
CN103410534B (en) * 2013-08-29 2016-02-10 郑州煤矿机械集团股份有限公司 Triple telescopic column for hydraulic support
CN109931083A (en) * 2019-03-15 2019-06-25 天地科技股份有限公司 A kind of triple retractable column with two levels of support function

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Application publication date: 20100929