CN101498222A - Double telescopic column and hydraulic support - Google Patents

Double telescopic column and hydraulic support Download PDF

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Publication number
CN101498222A
CN101498222A CNA2009100799155A CN200910079915A CN101498222A CN 101498222 A CN101498222 A CN 101498222A CN A2009100799155 A CNA2009100799155 A CN A2009100799155A CN 200910079915 A CN200910079915 A CN 200910079915A CN 101498222 A CN101498222 A CN 101498222A
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CN
China
Prior art keywords
cylinder
double
big
upright post
telescopic upright
Prior art date
Application number
CNA2009100799155A
Other languages
Chinese (zh)
Inventor
黄友贤
刘国柱
王建
师家钊
杜桂丽
张守祥
包冬生
仲丛和
吕金龙
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 CNA2009100799155A priority Critical patent/CN101498222A/en
Publication of CN101498222A publication Critical patent/CN101498222A/en

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Abstract

The invention discloses a double-telescopic upright post and a hydraulic support. The double-telescopic upright post comprises a big cylinder body, a middle cylinder body is arranged in the big cylinder body, a movable post body is arranged in the middle cylinder body, the bottom wall of the middle cylinder body is provided with a bottom valve, and the space between the piston cavity of the big cylinder body and the piston cavity of the middle cylinder body is communicated or cut off by opening or closing the bottom valve. The internal diameter of the big cylinder body is not smaller than 500 mm, the stroke of the movable post body is not shorter than 5 m, and the big cylinder body and the movable post body are made of 27SiMn. The invention has simple structure, convenient utilization and high reliability, and is particularly suitable for the high-mining height hydraulic support. The work resistance of a single upright post is higher than 8,500kN, and when the work resistance of the support is higher than 17,000kN, the support performance and the height requirements of the support can be satisfied.

Description

Double-telescopic upright post and hydraulic support

Technical field

The present invention relates to a kind of bracing or strutting arrangement, relate in particular to a kind of double-telescopic upright post and hydraulic support.

Background technology

In coal mining, along with continuing to increase of fully-mechanized mining working mining rate, the working resistance of hydraulic support trend ultimate development is exactly a column and can satisfy the key element that the working resistance of hydraulic support requires.

Column of the prior art, maximum is the column of φ 420mm, φ 450mm cylinder diameter, can be used on the electrichydraulic control support of 12000KN.

There is following shortcoming at least in above-mentioned prior art:

Be subjected to the influence of column cylinder diameter, the working resistance of hydraulic support, supporting intensity and supporting height are restricted.

Summary of the invention

The double-telescopic upright post and the hydraulic support that the purpose of this invention is to provide a kind of high workload resistance, high supporting intensity, big supporting height.

The objective of the invention is to be achieved through the following technical solutions:

Double-telescopic upright post of the present invention, comprise big cylinder body, the inside of described big cylinder body is provided with middle cylinder body, the inside of cylinder body is provided with cylinder alive in described, the diapire of cylinder body is provided with bottom valve in described, communicates between the plunger shaft that the opening or closing of described bottom valve makes described big cylinder body and the plunger shaft of described middle cylinder body or disconnects;

The internal diameter of described big cylinder body is more than or equal to 500mm; The stroke of described cylinder alive is more than or equal to 5m;

Described big cylinder body is 27SiMn with the material of the cylinder of living.

Hydraulic support of the present invention is provided with above-mentioned double-telescopic upright post between the top board of this hydraulic support and the base.

As seen from the above technical solution provided by the invention, double-telescopic upright post of the present invention and hydraulic support, owing to realize that by big cylinder body, middle cylinder body, the cylinder of living, bottom valve secondary is flexible, big cylinder body is 27SiMn with the material of the cylinder of living, the internal diameter of big cylinder body is more than or equal to 500mm, and the stroke of the cylinder of living is more than or equal to 5m.Can effectively improve working resistance, supporting intensity and the supporting height of hydraulic support.

Description of drawings

Fig. 1 is the structural representation of double-telescopic upright post of the present invention;

Fig. 2 is the partial structurtes schematic diagram of fairlead among the present invention.

The specific embodiment

Double-telescopic upright post of the present invention, its preferable specific embodiment as shown in Figure 1, comprise big cylinder body 1, cylinder body 3 during be equipped with the inside of big cylinder body 1, the inside of middle cylinder body 3 is provided with cylinder 4 alive, bottom valve 2 is equipped with in the bottom of cylinder body 3 in described, communicates between the plunger shaft that the opening or closing of bottom valve 2 makes big cylinder body 1 and the plunger shaft of middle cylinder body 3 or disconnects.

Big fairlead 5 can be provided with between big cylinder body 1 and the middle cylinder body 3, little fairlead 6 can be provided with, the guide effect when playing the column lifting between middle cylinder body 3 and the cylinder 4 alive.

As shown in Figure 2, the inwall of big fairlead 5 and the inwall of little fairlead 6 can be respectively equipped with four guide rings 7.The guide ring of installing on the fairlead increases to four by in the past two, to strengthen guide effect, satisfies the support capacity and the requirement for height of support.

The internal diameter of big cylinder body is more than or equal to 500mm; The stroke of cylinder alive is more than or equal to 5m; Big cylinder body can be 27SiMn with the material of the cylinder of living.

The lower end of the upper end of cylinder 4 alive and big cylinder body 1 can be respectively spherical, is convenient to be connected with base with the top board of hydraulic support.

The inside of cylinder 4 alive is provided with cavity vertically, and the lower end of cavity communicates with the rod end chamber of middle cylinder body 3; The upper end of cavity is by the 3rd liquid mouth C and exterior.

The core of bottom valve 2 is provided with the cavity of up/down perforation, is provided with push rod in the cavity, is provided with spring between the top of push rod and the roof of cavity, and spring compresses push rod downwards, and cavity is closed.The bottom surface of bottom valve 2 is stretched out in the lower end of push rod, and the position corresponding to push rod on the diapire of big cylinder body 1 is provided with boss, and when central cylinder body 3 was moved down into desired location, boss was with push rod jack-up, and bottom valve 2 is opened.

Hydraulic support of the present invention, its preferable specific embodiment are to be provided with above-mentioned double-telescopic upright post between the top board of this hydraulic support and the base.A hydraulic support can be established 2 to 4 above-mentioned double-telescopic upright posts.

Below operating principle of the present invention is described in detail:

The plunger shaft of big cylinder body 1 and rod end chamber are respectively by the first liquid mouth A and second liquid mouth B and the exterior, when hydraulic support rises frame, the first liquid mouth A feed liquor, the first liquid mouth B returns liquid, and middle cylinder body 3 stretches out earlier, reach the limit of the position after, bottom valve 2 is opened, liquid enters middle cylinder piston chamber, and the cylinder 4 of living stretches out, and rises the frame action and finishes.

When frame falls in hydraulic support, liquid mouth B, C feed liquor, liquid mouth A returns liquid, in cylinder body 3 withdrawal earlier, reach the limit of the position after, bottom valve 2 is opened, middle cylinder body 3 plunger shaft communicate with big cylinder body 1 plunger shaft, liquid in middle cylinder body 3 plunger shaft is flowed back to by the first liquid mouth A on the big cylinder body 1, and cylinder 4 withdrawals of living are fallen the frame action and finished.

Among the present invention, the big cylinder body of double-telescopic upright post can adopt 27SiMn tubing to make.Operating pressure in considering in the cylinder body is higher, be the requirement of strength of cylinder body in guaranteeing, the material of middle cylinder body can be selected the higher material of intensity for use, because the wall thickness dimension of fairlead is thinner, for avoiding after the heat treatment because the distortion that stress produces, its material selection 40Cr.Cylinder alive and other part can be selected 27SiMn for use.

This kind double-telescopic upright post is simple in structure, easy to use, reliability is high, is particularly useful for big mining height liquid support and selects for use.The working resistance of single upright column surpasses 8500KN, when working resistance of support during greater than 17000KN, can satisfy the support capacity and the requirement for height of support.

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 (10)

1, a kind of double-telescopic upright post, comprise big cylinder body, it is characterized in that, the inside of described big cylinder body is provided with middle cylinder body, the inside of cylinder body is provided with cylinder alive in described, the diapire of cylinder body is provided with bottom valve in described, communicates between the plunger shaft that the opening or closing of described bottom valve makes described big cylinder body and the plunger shaft of described middle cylinder body or disconnects;
The internal diameter of described big cylinder body is more than or equal to 500mm; The stroke of described cylinder alive is more than or equal to 5m;
Described big cylinder body is 27SiMn with the material of the cylinder of living.
2, double-telescopic upright post according to claim 1 is characterized in that, the upper end of described cylinder alive and the lower end of described big cylinder body are respectively spherical.
3, double-telescopic upright post according to claim 1 is characterized in that, the inside of described cylinder alive is provided with cavity vertically, and the lower end of described cavity communicates with the rod end chamber of described middle cylinder body; The upper end of described cavity and exterior.
4, double-telescopic upright post according to claim 1, it is characterized in that, the core of described bottom valve is provided with the cavity of up/down perforation, be provided with push rod in the described cavity, be provided with spring between the top of described push rod and the roof of described cavity, described spring compresses described push rod downwards, and described cavity is closed.
5, double-telescopic upright post according to claim 4 is characterized in that, the bottom surface of described bottom valve is stretched out in the lower end of described push rod.
6, according to claim 4 or 5 described double-telescopic upright posts, it is characterized in that the position corresponding to described push rod on the diapire of described big cylinder body is provided with boss.
7, double-telescopic upright post according to claim 1 is characterized in that, is provided with big fairlead between the outer wall of the cylinder mouth place of described big cylinder body and described middle cylinder body; Be provided with little fairlead between the outer wall of the cylinder mouth place of cylinder body and described cylinder alive in described.
8, double-telescopic upright post according to claim 7 is characterized in that, the inwall of described big fairlead and the inwall of little fairlead are respectively equipped with four guide rings.
9, a kind of hydraulic support is characterized in that, is provided with each described double-telescopic upright post of claim 1 to 8 between the top board of this hydraulic support and the base.
10, hydraulic support according to claim 9 is characterized in that, this hydraulic support is provided with 2 to 4 described double-telescopic upright posts.
CNA2009100799155A 2009-03-12 2009-03-12 Double telescopic column and hydraulic support CN101498222A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNA2009100799155A CN101498222A (en) 2009-03-12 2009-03-12 Double telescopic column and hydraulic support

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2009100799155A CN101498222A (en) 2009-03-12 2009-03-12 Double telescopic column and hydraulic support

Publications (1)

Publication Number Publication Date
CN101498222A true CN101498222A (en) 2009-08-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
CNA2009100799155A CN101498222A (en) 2009-03-12 2009-03-12 Double telescopic column and hydraulic support

Country Status (1)

Country Link
CN (1) CN101498222A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102140923A (en) * 2011-04-12 2011-08-03 天地科技股份有限公司 Guide ring overwelding seam large-cylinder bottom double-telescopic upright column
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
CN102562100A (en) * 2010-12-13 2012-07-11 襄樊禹仁机电液压科技有限公司 Automatic exhausting single hydraulic prop
CN103603975A (en) * 2013-11-26 2014-02-26 湖南特力液压有限公司 Check valve with push rod and multi-stage hydraulic cylinder
CN103939412A (en) * 2014-05-05 2014-07-23 湘潭大学 Rubbish transfer station compression oil cylinder and hydraulic control device of rubbish transfer station compression oil cylinder
CN104047622A (en) * 2014-06-09 2014-09-17 大连宏远气动液压船舶辅机有限公司 Double-telescoping stand column of hydraulic support

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102562100A (en) * 2010-12-13 2012-07-11 襄樊禹仁机电液压科技有限公司 Automatic exhausting single hydraulic prop
CN102140923A (en) * 2011-04-12 2011-08-03 天地科技股份有限公司 Guide ring overwelding seam large-cylinder bottom double-telescopic upright column
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
CN103603975A (en) * 2013-11-26 2014-02-26 湖南特力液压有限公司 Check valve with push rod and multi-stage hydraulic cylinder
CN103603975B (en) * 2013-11-26 2015-10-28 湖南特力液压有限公司 Multistage hydraulic cylinder
CN103939412A (en) * 2014-05-05 2014-07-23 湘潭大学 Rubbish transfer station compression oil cylinder and hydraulic control device of rubbish transfer station compression oil cylinder
CN104047622A (en) * 2014-06-09 2014-09-17 大连宏远气动液压船舶辅机有限公司 Double-telescoping stand column of hydraulic support

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Open date: 20090805