CN2213848Y - Low-position caving hydraulic support for coal mine - Google Patents
Low-position caving hydraulic support for coal mine Download PDFInfo
- Publication number
- CN2213848Y CN2213848Y CN 94245186 CN94245186U CN2213848Y CN 2213848 Y CN2213848 Y CN 2213848Y CN 94245186 CN94245186 CN 94245186 CN 94245186 U CN94245186 U CN 94245186U CN 2213848 Y CN2213848 Y CN 2213848Y
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- CN
- China
- Prior art keywords
- back timber
- hydraulic support
- extensible canopy
- utility
- low
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a low-position caving hydraulic support frame, comprising a top beam, a telescopic beam installed at the front end of the top beam, and a jack which can drive the telescopic beam to make front and back movement. The top beam has an integral structure, and the telescopic beam is inserted into a box cavity in an upwards cocked shape, which is arranged at the front end of the top beam. One end of the jack is combined with the top beam together through an articulated piece, and the other end is combined with the front end of the telescopic beam through an articulated piece. The utility model not only has a simple structure and increase the force of beam ends, but also brings convenience to the front end top addition and the top truncation. The utility model overcomes the defects of serious rib spalling and large pressure at the front end of a mining face.
Description
The utility model relates to a kind of colliery to be combined and to put the support apparatus that face is adopted in mechanization, relates to a kind of low caving coal hydraulic support specifically.
Hydraulic support is to be widely used in the support apparatus that face is adopted in the colliery comprehensive mechanization, it is low that the related low caving coal hydraulic support major advantage of the utility model is to put coal point, frame forms ripe, the scope of application is wide, it both can use as general four post support shield type support, also can use as four post support with mesh-layingdevices.But the low caving coal hydraulic support of above-mentioned prior art is because its back timber (as shown in Figure 1) mostly is the two-segment type structure, promptly form by back timber and the front-axle beam hinged and the extensible canopy that is loaded in the front-axle beam with it, each realizes the swing of its front-axle beam and the displacement of extensible canopy by a jack respectively, its manufacturing process more complicated of the support of this form of structure, the jack that is used to connect back timber and front-axle beam because of its cylinder diameter less and intensity limit, the hinge arm of force is little in addition, make and choose difficulty on the front-axle beam, cause beam-ends power little, thick, it is wayward that the soft seam operation top board (top coal) occurs because of end pressure in face of adopting is big often, wall caving is than serious problems.In addition, because of being the hinge annexation between back timber and the front-axle beam, so be difficult for also accomplishing that back timber is totally-enclosed.
The purpose of this utility model just is that overcoming above-mentioned weak point of the prior art and a kind of back timber is provided is monolithic and the low caving coal hydraulic support that has the bending upwards type extensible canopy.
The purpose of this utility model can adopt following measure to realize:
Low caving coal hydraulic support of the present utility model mainly be by base, tail boom, caving shield and caving shield, hinged back timber and be installed in be used on the base to support, parts such as the hydraulic vertical prop of lifting tail boom, caving shield, back timber and front-rear linkage form; Its back timber is a monolithic construction, and extensible canopy is and upwarps shape and be plugged in the set case chamber of back timber leading section; Be used to promote extensible canopy do before and after the end of jack of displacement combine by articulated elements and back timber, the other end combines with the front end of extensible canopy by articulated elements.
Angle between the axis of its extensible canopy and the horizontal axis of back timber can be selected between 2 °～5 °, is preferably 3.5 °.
The hinged frame mode that forms of two joints is a joint monolithic construction in the prior art because the back timber in the utility model is changed, and its extensible canopy is upwarps shape and be plugged in the set case chamber of back timber leading section, so not only simplify the structure, increased the strength of beam-ends, and solved the not tight weak point of existing back timber top seal in the prior art effectively, and can be according to the extend side guard board of back timber of the actual needs of adopting face; Be to present obliquely to stretch out when protracting in addition to the front upper place because of extensible canopy, termination top and cut the top before being convenient to, overcome in the prior art existing wall caving serious, adopt in face of the bigger weak point of end pressure; Be specially adapted at top board, top coal softlyer, and use in the thick coal-layer mining in the non-soft geological conditions of base plate; And can replace part meta sublevel caving hydrau lic support.
The drawing of accompanying drawing is described as follows:
Fig. 1 is a back timber structural front view of the prior art.
Fig. 2 is the integrally-built front view of the utility model.
Fig. 3 is the front view of back timber structure among Fig. 2.
The utility model is done with detailed description below with reference to embodiment (accompanying drawing):
As shown in Figure 2, hydraulic support of the present utility model mainly is by base (6), be arranged on the hydraulic vertical prop (5) that is used for lifting, supporting top beam between base (6) and the back timber (3), position and the extensible canopy (4) of back timber (3) front end and be hinged on the caving shield (2) at back timber (3) rear portion, the tail boom (1) that combines with caving shield, and be arranged on front and rear connecting rods (8) (7) between caving shield (2) and the base (6), and hydraulic system is formed.
As shown in Figure 3, the back timber in the utility model (3) is a monolithic construction, and extensible canopy (4) is and upwarps shape and be plugged in the set case chamber of back timber (3) leading section; Be used to promote extensible canopy do before and after the end of jack (9) of displacement combine by articulated elements and back timber, the other end combines with the front end of extensible canopy by articulated elements; Angle between the axis of extensible canopy and the horizontal axis of back timber is 3.5 °.
Claims (3)
1, a kind of low caving coal hydraulic support, it comprises back timber (3), is loaded on the extensible canopy (4) of back timber front end, and can promote the jack (9) that extensible canopy is done the front and back displacement, it is characterized in that: back timber (3) is a monolithic construction, and extensible canopy (4) is and upwarps shape and be plugged in the set case chamber of back timber leading section; One end of jack (9) combines by articulated elements and back timber (3), and the other end combines by the front end of articulated elements with extensible canopy (4).
2, low caving coal hydraulic support according to claim 1 is characterized in that: the angle between the horizontal axis of the axis of extensible canopy (4) and back timber (3) is 2 °～5 °.
3, low caving coal hydraulic support according to claim 1 is characterized in that: the angle between the horizontal axis of the axis of extensible canopy (4) and back timber (3) is preferably 3.5 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94245186 CN2213848Y (en) | 1994-11-21 | 1994-11-21 | Low-position caving hydraulic support for coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94245186 CN2213848Y (en) | 1994-11-21 | 1994-11-21 | Low-position caving hydraulic support for coal mine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2213848Y true CN2213848Y (en) | 1995-11-29 |
Family
ID=33851054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94245186 Expired - Fee Related CN2213848Y (en) | 1994-11-21 | 1994-11-21 | Low-position caving hydraulic support for coal mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2213848Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1087807C (en) * | 1999-11-10 | 2002-07-17 | 兖矿集团有限公司 | Hydraulic prop frame for low position blasting down the roof coal |
| CN100359132C (en) * | 2003-03-05 | 2008-01-02 | 兖矿集团有限公司 | Hydraulic coal mine support for low-position roof blasting-down |
-
1994
- 1994-11-21 CN CN 94245186 patent/CN2213848Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1087807C (en) * | 1999-11-10 | 2002-07-17 | 兖矿集团有限公司 | Hydraulic prop frame for low position blasting down the roof coal |
| CN100359132C (en) * | 2003-03-05 | 2008-01-02 | 兖矿集团有限公司 | Hydraulic coal mine support for low-position roof blasting-down |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |