CN110273701A - Shock resistance triple retractable column for hydraulic support - Google Patents
Shock resistance triple retractable column for hydraulic support Download PDFInfo
- Publication number
- CN110273701A CN110273701A CN201910706765.XA CN201910706765A CN110273701A CN 110273701 A CN110273701 A CN 110273701A CN 201910706765 A CN201910706765 A CN 201910706765A CN 110273701 A CN110273701 A CN 110273701A
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- China
- Prior art keywords
- cylinder body
- level
- blind hole
- piston
- level cylinder
- Prior art date
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- 230000035939 shock Effects 0.000 title claims abstract description 10
- 101100532451 Rattus norvegicus Slc22a17 gene Proteins 0.000 claims abstract description 22
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 230000002093 peripheral effect Effects 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 9
- 238000005242 forging Methods 0.000 claims description 3
- 239000000839 emulsion Substances 0.000 description 9
- 239000003245 coal Substances 0.000 description 7
- 230000007423 decrease Effects 0.000 description 3
- 238000005065 mining Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
Classifications
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- 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
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
-
- 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
-
- 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)
- Architecture (AREA)
- Structural Engineering (AREA)
- Actuator (AREA)
Abstract
The invention discloses a kind of shock resistance triple retractable columns for hydraulic support, including level-one cylinder body, control valve seat on level-one outer wall of cylinder block and drop column liquid inlet joint are set, the intracorporal second level cylinder body of first-stage cylinder is slidably arranged in by the sealing of the first guide sleeve, three-level cylinder body is provided with by the sealing sliding of the second guide sleeve in secondary cylinder body, three-level cylinder body is interior to be provided with piston boit by the sealing sliding of third guide sleeve；Piston boit lower end surface is provided in the axial direction with the first blind hole, and the first blind hole internal clearance is provided with support rod, and post upper face is provided in the axial direction with the second blind hole, and the lower part of the second blind hole radially offers the flow-guiding channel communicated with the first blind hole inner cavity；Post upper outer peripheral surface is provided with land, and land outer peripheral surface is slidably matched with the sealing of the first blind hole inner peripheral surface, and support rod lower end periphery face seals sliding sleeve and piston is housed, and piston is fixedly connected with piston boit.The present invention is under the premise of meeting the big magnification of design requirement, so that three-level cylinder cavity of resorption pressure reduces by 20% or more.
Description
Technical field
The present invention relates to coal mine fully-mechanized mining face hydraulic supports, are especially for three telescopic vertical of shock resistance of hydraulic support
Column.
Background technique
Currently, hydraulic support column used in coal mine coal mine fully mechanized coal face has single-telescopic prop, single flexible mechanical lengthen to stand
Column, double-telescopic upright post.Wherein double-telescopic upright post magnification is maximum, can satisfy the demand of most coal mines；But for a small number of areas
Ocurrence of coal seam thickness frequently changes, especially when fully mechanized mining area have tomography need across when, this requires the ascending, descending models of hydraulic support
It encloses bigger；And for part Special Coal Seam, double-telescopic upright post can not meet hydraulic support highest supporting height and most bottom simultaneously
The big requirement of supporting height ratio.
Skill disclosed in Chinese invention patent ZL201310383905.7, entitled " triple telescopic column for hydraulic support "
Art scheme efficiently solves the problems, such as big magnification, but there is also the larger problems of pressure carried in three-level cylinder.This is because
The cylinder diameter of one, two, three cylinder reduces step by step in triple retractable column, and the ambient pressure of every first-stage cylinder carrying is identical but the pressure of carrying
Increase step by step, since pressure and loaded area are inversely proportional, so that the pressure carried in three-level cylinder is excessively high；Especially hydraulic
When bracket frequently absorbs impact load, column detonation, guide sleeve is easily caused the severe event such as to be got, equipment and personnel are pacified
It causes a significant threat entirely.
Summary of the invention
It is an object of that present invention to provide a kind of shock resistance triple retractable columns for hydraulic support.
To achieve the above object, the present invention takes following technical proposals:
Shock resistance triple retractable column of the present invention for hydraulic support, including level-one cylinder body are arranged in the level-one cylinder body
Control valve seat and drop column liquid inlet joint on outer wall, are slidably arranged in the intracorporal secondary cylinder of first-stage cylinder by the sealing of the first guide sleeve
Body, the secondary cylinder body is interior to be provided with three-level cylinder body by the sealing sliding of the second guide sleeve, passes through third in the three-level cylinder body
Guide sleeve sealing sliding is provided with piston boit；The first liquid of connection I and II cylinder body cavity of resorption is provided on the bottom wall of second level cylinder body
Valve is controlled, the second pilot operated valve device of connection two, three-level cylinder body cavity of resorption is provided on three-level cylinder body bottom wall；The control valve seat liquid outlet with
Level-one cylinder body cavity of resorption is connected, and the drop column liquid inlet joint is connected with level-one cylinder body epicoele, in second level cylinder side wall along longitudinal direction
Offer the second level runner of connection I and II cylinder body epicoele；Connection two, three-level cylinder body epicoele are offered in three-level cylinder side wall
Three-level runner；It is provided in the axial direction with the first blind hole in the piston boit lower end surface, concentric gap is provided in first blind hole
Support rod, the post upper face are provided in the axial direction with the second blind hole, the lower part of second blind hole radially offer with
The flow-guiding channel that first blind hole inner cavity communicates；Post upper outer peripheral surface is provided with land, and the land and support rod are forging and stamping
The integral structure of processing, land outer peripheral surface are slidably matched with the sealing of the first blind hole inner peripheral surface, and the sealing of support rod lower end periphery face is slided
Dynamic to be set with piston, the piston is fixedly connected with piston boit.
The present invention is under the premise of meeting the big magnification of design requirement, so that three-level cylinder interior bearing area is increased,
Three-level cylinder cavity of resorption pressure reduces by 20% or more.Therefore, when triple retractable column is when absorbing impact load, a part of surge quilt
The 4th pressure pocket is drained into, the attack time is extended, reduces the destruction of surge generation.
Detailed description of the invention
Fig. 1 is main view of the invention.
Fig. 2 is the A-A of Fig. 1 to schematic cross-sectional view.
Specific embodiment
It elaborates with reference to the accompanying drawing to the embodiment of the present invention, the present embodiment before being with technical solution of the present invention
It puts and is implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to down
State embodiment.
As shown in Figure 1, 2, the shock resistance triple retractable column of the present invention for hydraulic support, including level-one cylinder body 1,
Control valve seat 1.1 on 1 outer wall of level-one cylinder body and drop column liquid inlet joint 1.2 are set, is sealed and is slided by the first guide sleeve 1.3
Second level cylinder body 2 in level-one cylinder body 1 is set, is slided in second level cylinder body 2 by the sealing of the second guide sleeve 2.1 and is provided with three-level cylinder
Body 3, three-level cylinder body 3 is interior to be provided with piston boit 4 by the sealing sliding of third guide sleeve 3.1；It is provided on the bottom wall of second level cylinder body 2
It is connected to the first pilot operated valve device 2.2 of I and II cylinder body 1,2 cavity of resorptions, is provided with connection two, three-level cylinder body 2,3 on 3 bottom wall of three-level cylinder body
Second pilot operated valve device 3.2 of cavity of resorption；1.1 liquid outlet of control valve seat is connected with 1 cavity of resorption of level-one cylinder body, drop column liquid inlet joint 1.2 with
1 epicoele of level-one cylinder body is connected, and offers the secondary streams of connection I and II cylinder body 1,2 epicoeles in 2 side wall of second level cylinder body along longitudinal direction
Road 2.3；Offered in 3 side wall of three-level cylinder body connection two, three-level cylinder body 2,3 epicoeles three-level runner 3.3；In 4 lower end of piston boit
Face (left side in figure) is provided in the axial direction with the first blind hole 4.1, and concentric gap is provided with support rod 5 in the first blind hole 4.1, support
5 upper surface of bar (right side in figure) is provided in the axial direction with the second blind hole 5.1, and the lower part (left part in figure) of the second blind hole 5.1 is along diameter
To offering the flow-guiding channel 5.2 communicated with 4.1 inner cavity of the first blind hole；The setting of 5 upper end of support rod (right side in figure) outer peripheral surface
There is land 5.3, land 5.3 and support rod 5 are the integral structure of forging process, 4.1 inner circumferential of 5.3 outer peripheral surface of land and the first blind hole
Face sealing is slidably matched, and 5 lower end periphery face of support rod seals sliding sleeve and piston 6 is housed, and piston 6 is fixedly connected with piston boit 4.
Working principle of the present invention is summarized as follows:
1, setting prop: emulsion enters intracavitary under level-one cylinder body 1, promotion second level by the control valve seat 1.1 on 1 outer wall of level-one cylinder body
Cylinder body 2 drives three-level cylinder body 3 and piston boit 4 to rise together, and second level cylinder body 2 is raised to extreme higher position stopping, and the first pilot operated valve device 2.2 is beaten
Open, emulsion enter it is intracavitary under second level cylinder body 2, push three-level cylinder body 3 drive piston boit 4 rise together, three-level cylinder body 3 is raised to most
High position stops, and the second pilot operated valve device 3.2 is opened, and emulsion enters intracavitary under three-level cylinder body 3, the promotion rising of piston boit 4, piston boit
4 are raised to extreme higher position stopping, and entire column uphill process terminates.
It should be stressed that: support rod 5 is stationary in 4 uphill process of piston boit, therefore enters three-level cylinder
Intracavitary emulsion enters the second blind hole 5.1 by flow-guiding channel 5.2 under body 3, and emulsion is blind through the arrival first of the second blind hole 5.1
In 4th pressure pocket 7 at 4.1 top of hole, it may be assumed that the pressure of 3 cavity of resorption of three-level cylinder is transmitted in the 4th pressure pocket 7 of piston boit 4,
Therefore it is equivalent to and increases the bearing area of 3 cavity of resorption of three-level cylinder, to reduce the pressure of three-level cylinder cavity of resorption receiving；Meanwhile
When this triple retractable column is by shock loading, the emulsion in the 4th pressure pocket 7 at 4 top of three-level cylinder body 3 and piston boit is risen
To buffer function, the hydroelastic system coefficient of column entirety is efficiently reduced, working time of collision is extended, is significantly enhanced vertical
The shock resistance of column.
2, drop column: emulsion enters 1 epicoele of level-one cylinder body, first-stage cylinder by the liquid inlet joint 1.2 on 1 outer wall of level-one cylinder body
1 cavity of resorption of body returns liquid, and the first pilot operated valve device 2.2, the second pilot operated valve device 3.2 are in closed state at this time, and emulsion pushes second level cylinder body 2
Three-level cylinder body 3 and piston boit 4 is driven to decline, the first pilot operated valve device 2.2 is opened when second level cylinder body 2 is down to most bottom position, and emulsion pushes away
Dynamic three-level cylinder body 3 and piston boit 4 decline together, and when three-level cylinder body 3 is down to most bottom position, the second pilot operated valve device 3.2 is opened, emulsification
Liquid pushes piston boit 4 to decline, and entire column drop column process terminates.
Meanwhile the land 5.3 and support rod 5 of the setting of 5 upper end outer peripheral surface of support rod forge and press one-pass molding, entirety by high temperature
It is process, ensure that the integral strength and concentricity of support rod 5.
Claims (1)
1. a kind of shock resistance triple retractable column for hydraulic support, including level-one cylinder body are arranged in the level-one outer wall of cylinder block
On control valve seat and drop column liquid inlet joint, by the first guide sleeve sealing be slidably arranged in the intracorporal second level cylinder body of first-stage cylinder,
Three-level cylinder body is provided with by the sealing sliding of the second guide sleeve in the secondary cylinder body, is oriented in the three-level cylinder body by third
Set sealing sliding is provided with piston boit；The first pilot operated valve device of connection I and II cylinder body cavity of resorption is provided on the bottom wall of second level cylinder body,
The second pilot operated valve device of connection two, three-level cylinder body cavity of resorption is provided on three-level cylinder body bottom wall；The control valve seat liquid outlet and level-one
Cylinder body cavity of resorption is connected, and the drop column liquid inlet joint is connected with level-one cylinder body epicoele, opens up along longitudinal direction in second level cylinder side wall
There is the second level runner of connection I and II cylinder body epicoele；The three-level of connection two, three-level cylinder body epicoele is offered in three-level cylinder side wall
Runner；It is characterized by: being provided in the axial direction with the first blind hole, concentric gap in first blind hole in the piston boit lower end surface
It is provided with support rod, the post upper face is provided in the axial direction with the second blind hole, and the lower part of second blind hole is radially opened
Equipped with the flow-guiding channel communicated with the first blind hole inner cavity；Post upper outer peripheral surface is provided with land, the land and support rod
For the integral structure of forging process, land outer peripheral surface is slidably matched with the sealing of the first blind hole inner peripheral surface, support rod lower end periphery face
It seals sliding sleeve and piston is housed, the piston is fixedly connected with piston boit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910706765.XA CN110273701A (en) | 2019-08-01 | 2019-08-01 | Shock resistance triple retractable column for hydraulic support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910706765.XA CN110273701A (en) | 2019-08-01 | 2019-08-01 | Shock resistance triple retractable column for hydraulic support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110273701A true CN110273701A (en) | 2019-09-24 |
Family
ID=67965656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910706765.XA Pending CN110273701A (en) | 2019-08-01 | 2019-08-01 | Shock resistance triple retractable column for hydraulic support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110273701A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113175342A (en) * | 2021-04-15 | 2021-07-27 | 中煤科工开采研究院有限公司 | Shock-resistant double-telescopic upright post |
-
2019
- 2019-08-01 CN CN201910706765.XA patent/CN110273701A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113175342A (en) * | 2021-04-15 | 2021-07-27 | 中煤科工开采研究院有限公司 | Shock-resistant double-telescopic upright post |
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