CN203463117U - Triple stretchable vertical column for hydraulic bracket - Google Patents
Triple stretchable vertical column for hydraulic bracket Download PDFInfo
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- CN203463117U CN203463117U CN201320532374.9U CN201320532374U CN203463117U CN 203463117 U CN203463117 U CN 203463117U CN 201320532374 U CN201320532374 U CN 201320532374U CN 203463117 U CN203463117 U CN 203463117U
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Abstract
The utility model discloses a triple stretchable vertical column for a hydraulic bracket. The triple stretchable vertical column for the hydraulic bracket comprises a first-level cylinder, a second-level cylinder and a third-level cylinder, wherein a piston pillar is arranged in the third-level cylinder; a first liquid control valve for communicating the lower cavities of the first-level cylinder and the second-level cylinder is arranged on a bottom wall of the second-level cylinder; a second liquid control valve for communicating the lower cavities of the second-level cylinder and the third-level cylinder is formed on the bottom wall of the third-level cylinder; a valve base is arranged on an outer wall of the first-level cylinder; a first-level runner communicated with the valve base is formed in a side wall of the first-level cylinder; a second-level runner for communicating the upper cavities of the first-level cylinder and the second-level cylinder is arranged on the side wall of the second-level cylinder along a longitudinal direction; and a third-level runner for communicating the upper cavities of the second-level cylinder and the third-level cylinder is formed in the side wall of the third-level cylinder. The triple stretchable vertical column for the hydraulic bracket has the advantages that the liquid introducing mode of the present stretchable vertical column is changed; the welding parts, such as, a plurality of plinths, liquid pipes, shields and the like, arranged for the present stretchable vertical column are omitted; the probability of liquid leakage from the cylinder welding joint is reduced; a liquid port is no longer arranged on a head part of the piston pillar; and the stretching ratio of the stretchable vertical column is increased while the structure is more simple and compact.
Description
Technical field
The utility model relates to hydraulic support, especially relates to hydraulic support triple retractable column.
Background technology
At present, three kinds of forms that the hydraulic support column using in coal mining has: single telescopic column, single flexible machinery lengthen column, double-telescopic upright post.Wherein double-telescopic upright post magnification is maximum, can meet the demand in most collieries.But minority area ocurrence of coal seam thickness frequent variations, particularly, when comprehensive exploiting field has tomography to pass, all requires the ascending, descending scope of hydraulic support larger.Existing double-telescopic upright post is the requirement that meets large magnification, often needs to strengthen column forward leaning angle, and this will cause, and hydraulic support miscellaneous part is stressed sharply to be strengthened, and has weakened the effective support ability of hydraulic support.Even part Special Coal Seam double-telescopic upright post also cannot meet the end of hydraulic support, peak demand.
Summary of the invention
The hydraulic support triple retractable column that provides a kind of magnification large, simple in structure is provided the utility model object.
For achieving the above object, the utility model is taked following technical proposals:
Hydraulic support triple retractable column described in the utility model, comprise one-level cylinder body, by the first fairlead sealing, be slidably arranged in the secondary cylinder body in described one-level cylinder body, in described secondary cylinder body, by the second fairlead sealing, slide and be provided with three grades of cylinder bodies, in described three grades of cylinder bodies, by the 3rd fairlead sealing, slide and be provided with piston boit; The diapire of secondary cylinder body is provided with the first pilot operated valve device that is communicated with I and II cylinder body cavity of resorption; Three grades of cylinder body diapires are provided with the second pilot operated valve device that is communicated with two, three grades of cylinder body cavity of resorptions; One-level outer wall of cylinder block is provided with valve seat, longitudinally offers many one-level runners that are connected with described valve seat in first-stage cylinder body sidewall, and a runner in described many one-level runners is communicated with one-level cylinder body epicoele, and all the other runners are communicated with one-level cylinder body cavity of resorption; In secondary cylinder body sidewall, longitudinally offer the secondary runner that is communicated with I and II cylinder body epicoele; In three grades of cylinder side walls, offer three grades of runners that are communicated with two, three grades of cylinder body epicoeles.
The utility model advantage is to adopt secondary cylinder body, three grades of cylinder bodies, three grades of piston boits flexible, and adopt first, second pilot operated valve device as Double bottom valve, the thrust of each working chamber of telescopic column is equated, by being arranged on valve seat and piston boit and described one, two, three runner on one-level outer wall of cylinder block, changed the logical liquid mode of existing telescopic column simultaneously.As shown in Figure 3, save existing telescopic column and need to establish the welding assemblies such as a plurality of plinths 20, fluid-through tube 21, guard shield 22, reduced the probability of cylinder body weld seam leakage, and piston boit head does not need to offer fluid-through port 23, when increasing telescopic column magnification, make structure more simple compact.Meanwhile, one, two, three cylinder body all adopts one, two, three runner feed liquor, do not arrange into, return liquid joint, fluid-through tube etc., in use, do not connect separately high-pressure rubber pipe, make telescopic column simply attractive in appearance.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the I portion structure for amplifying schematic diagram of Fig. 1.
Fig. 3 is the structural representation of double-telescopic upright post in prior art.
The specific embodiment
As shown in Figure 1, 2, hydraulic support triple retractable column described in the utility model, comprise one-level cylinder body 1, by the first fairlead 2 sealings, be slidably arranged in the secondary cylinder body 3 in described one-level cylinder body 1, in described secondary cylinder body 3, by the second fairlead 4 sealings, slide and be provided with three grades of cylinder bodies 5, in described three grades of cylinder bodies 5, by the 3rd fairlead 6 sealings, slide and be provided with piston boit 7; The diapire of secondary cylinder body 3 is provided with the first pilot operated valve device 10 that is communicated with I and II cylinder body cavity of resorption 8,9; Three grades of cylinder body 5 diapires are provided with the second pilot operated valve device 12 that is communicated with two, three grades of cylinder body cavity of resorptions 9,11; One-level cylinder body 1 outer wall is provided with valve seat 15, in one-level cylinder body 1 sidewall, longitudinally offer three one-level runners 14 that are connected with described valve seat 15, a runner in described three one-level runners 14 is communicated with one-level cylinder body epicoele 13, and all the other two runners are communicated with one-level cylinder body cavity of resorption 8; In secondary cylinder body 3 sidewalls, longitudinally offer the secondary runner 17 that is communicated with I and II cylinder body epicoele 13,16; In three grades of cylinder body 5 sidewalls, offer three grades of runners 19 that are communicated with two, three grades of cylinder body epicoeles 16,18.
The utility model operating principle is summarized as follows:
1, setting prop: emulsion enters in one-level cylinder body cavity of resorption 8 by the valve seat 15 on one-level cylinder body 1 outer wall, promoting secondary cylinder body 3 drives three grades of cylinder bodies 5 and piston boit 7 to rise together, secondary cylinder body 3 is raised to extreme higher position to be stopped, the first pilot operated valve device 10 is opened, emulsion enters in secondary cylinder body cavity of resorption 9, promoting three grades of cylinder bodies 5 drives piston boit 7 to rise together, three grades of cylinder bodies 5 are raised to extreme higher position to be stopped, the second pilot operated valve device 12 is opened, emulsion enters in three grades of cylinder bodies, 5 cavity of resorptions 11, promoting piston boit 7 rises, piston boit 11 is raised to extreme higher position to be stopped, whole column uphill process finishes.
2, post falls: emulsion enters one-level cylinder body epicoele 13 by the valve seat 15 on one-level cylinder body 1 outer wall, 8 times liquid of one-level cylinder body cavity of resorption, now the first pilot operated valve device 10, the second pilot operated valve device 12 are all in closed condition, emulsion promotes secondary cylinder body 3 and drives three grades of cylinder bodies 5 and piston boit 7 to decline, when secondary cylinder body 5 is down to position, the end, the first pilot operated valve device 10 is opened, emulsion promotes three grades of cylinder bodies 5 and piston boit 7 declines together, when three grades of cylinder bodies 5 are down to position, the end, the second pilot operated valve device 12 is opened, emulsion promotes piston boit 7 and declines, and post process falls in whole column to be finished.
Claims (1)
1. a hydraulic support triple retractable column, comprise one-level cylinder body (1), by the first fairlead (2) sealing, be slidably arranged in the secondary cylinder body (3) in described one-level cylinder body (1), it is characterized in that: in described secondary cylinder body (3), by the second fairlead (4) sealing, slide and be provided with three grades of cylinder bodies (5), in described three grades of cylinder bodies (5), by the 3rd fairlead (6) sealing, slide and be provided with piston boit (7); The diapire of secondary cylinder body (3) is provided with the first pilot operated valve device (10) that is communicated with I and II cylinder body cavity of resorption (8,9); Three grades of cylinder bodies (5) diapire is provided with the second pilot operated valve device (12) that is communicated with two, three grades of cylinder body cavity of resorptions (9,11); One-level cylinder body (1) outer wall is provided with valve seat (15), in one-level cylinder body (1) sidewall, longitudinally offer many one-level runners (14) that are connected with described valve seat (15), a runner in described many one-level runners (14) is communicated with one-level cylinder body epicoele (13), and all the other runners are communicated with one-level cylinder body cavity of resorption (8); In secondary cylinder body (3) sidewall, longitudinally offer the secondary runner (17) that is communicated with I and II cylinder body epicoele (13,16); In three grades of cylinder bodies (5) sidewall, offer the three grades of runners (19) that are communicated with two, three grades of cylinder body epicoeles (16,18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320532374.9U CN203463117U (en) | 2013-08-29 | 2013-08-29 | Triple stretchable vertical column for hydraulic bracket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320532374.9U CN203463117U (en) | 2013-08-29 | 2013-08-29 | Triple stretchable vertical column for hydraulic bracket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203463117U true CN203463117U (en) | 2014-03-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320532374.9U Withdrawn - After Issue CN203463117U (en) | 2013-08-29 | 2013-08-29 | Triple stretchable vertical column for hydraulic bracket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203463117U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2013
- 2013-08-29 CN CN201320532374.9U patent/CN203463117U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140305 Effective date of abandoning: 20160210 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140305 Effective date of abandoning: 20160210 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |