CN201170103Y

CN201170103Y - Internal circulation single hydraulic prop

Info

Publication number: CN201170103Y
Application number: CNU2008200188519U
Authority: CN
Inventors: 成立良; 杨菲
Original assignee: SHANDONG XINMEI MACHINERY EQUIPMENT CO Ltd
Current assignee: Shandong Xinmei Machinery Equipment Co., Ltd.
Priority date: 2008-03-11
Filing date: 2008-03-11
Publication date: 2008-12-24
Anticipated expiration: 2018-03-11

Abstract

The utility model discloses an internal recycle type single body hydraulic prop, comprising a top cover, a base seat, a shelf body, a wobble pump, a plurality of check valves, a plunger, a plunger barrel, an overflow valve, a relief valve, and an unloading valve. An outer oil storing cavity is communicated with a high pressure end and a low pressure end of the wobble pump through the check valve I and the check valve II. An outer oil storing cavity is communicated with a high pressure end and a low pressure end of the wobble pump through the check valve III and the check valve IV. The inner oil storing cavity and the outer oil storing cavity are respectively provided with the unloading valve and the relief valve which are in parallel connection. The overflow valve is arranged between the lower pressure end of the wobble pump and the outer oil storing cavity. The hydraulic prop has the characteristics of small volume, light weight, large carrying capacity, quick prop hoisting, convenient prop dropping, reliable sealing performance, environmental protection, no need of a pumping station and a pipe system, convenient management, etc.

Description

A kind of internal-circulation type hydraulic prop

One, technical field

The utility model is the fast constant-resistance type support apparatus that a kind of coal mine work area is used---a kind of internal-circulation type hydraulic prop, be used for low coal seam mechanical coal mining or blast mining face under the coal mine, and for improving safety work and operating efficiency good effect is arranged.

Two, background technology

Existing pillar mainly contains external poured and internal-injection type hydraulic prop.

That outside injection type hydraulic pillar has is simple in structure, manufacturing technology is ripe, characteristics such as applied widely.But have certain deficiency: working solution is supplied with through high-pressure hose and fluid injection gun by the pumping plant in the tunnel, with fluid injection gun working solution is injected the pillar inner chamber from the triple-use valve liquid injection hole, makes it to raise and install; Also rotation in the unloading hole of unloading handgrip insertion triple-use valve, emulsion injects the old man through feather valve during unloading, thereby realizes falling post.But emulsion directly is discharged to old man not only contaminated environment, waste resource, and makes the working environment severe exacerbation of the low coal seam scope of operation.When moving, this operating type needs mobile high-voltage sebific duct and fluid injection gun simultaneously, the pumping plant in the also necessary mobile tunnel.This has increased labour intensity virtually, and cost is improved greatly.

Existing internal-injection type hydraulic prop is that hand pump, valve are placed in the cylinder alive, and the hand-operated mechanism of operation hand pump is contained on the column cap, this structure column structure complexity just alive, and manufacture difficulty increases.Because hand pump, valve are placed in the cylinder alive, so its height just is restricted, the coal seam that highly is lower than 0.7m just can not be adopted for mining.

Three, summary of the invention

The purpose of this utility model just be to provide a kind of in light weight, supporting capacity is big, setting prop is fast, prop drawing is convenient, the reliable internal-circulation type hydraulic prop of sealing performance.

The technical scheme that the utility model is taked is as follows:

A kind of internal-circulation type hydraulic prop comprises top cover, base, support body, hand pump, a plurality of one way valve, plunger, plunger barrel, overflow valve, safety valve, feather valve; Hand pump is provided with high-pressure side and low-pressure end; Support body is arranged on the base, and inboard, support body upper end is provided with plunger, and the upper end of plunger is provided with top cover, and plunger is arranged with plunger barrel outward, and plunger barrel is arranged on the support body, and the inboard of support body and the plunger barrel outside form outer shoe cream room; Plunger lower end and plunger barrel and support body form interior shoe cream room; The support body upper end is provided with gland, and gland is provided with air vent, and this air vent communicates with the top of outer shoe cream room and plunger barrel; Outer shoe cream room is connected with the high-pressure side and the low-pressure end of hand pump respectively through one way valve I, II; Interior shoe cream room is connected with the high-pressure side and the low-pressure end of hand pump respectively through one way valve III, IV; Interior shoe cream room and outer shoe cream room are provided with feather valve and safety valve in parallel; Be provided with overflow valve between the low-pressure end of hand pump and outer shoe cream room.

Above-mentioned internal-circulation type hydraulic prop, one way valve, hand pump, feather valve, safety valve, overflow valve are arranged on the support body bottom.

For strengthening its sealing effectiveness, be provided with rubber bag tank in the shoe cream room outside, fluid is arranged in this rubber bag tank.

Adopt the internal-circulation type hydraulic prop of said structure, it can have the following course of work:

Close feather valve,, the piston of hand pump is pumped with hand moving hand pump; When handle moves downward, the low-pressure end of hand pump and high-pressure side respectively through one way valve I, II from outer shoe cream room imbibition, one way valve III, IV close; When handle moved upward, one way valve I, II closed, and by the inside shoe cream room topping up of one way valve III, IV, piston moves upward respectively for the high-pressure side of hand pump and low-pressure end, at this moment the simultaneously inside shoe cream room topping up of the high and low pressure side of hand pump;

When pressure reaches certain value, the hand pump low-pressure end continues by one way valve I imbibition, when handle moves upward, insufficient pressure so that one way valve IV is opened but has surpassed the pressure set points of overflow valve, the fluid of low-pressure end flows back to outer shoe cream room by overflow valve, and high-pressure side continues to pass through one way valve II from outer shoe cream room imbibition, by the inside shoe cream room internal-filling liquid of one way valve III, has only high-pressure side work;

In the time of need falling post, feather valve opened get final product.

The beneficial effects of the utility model show:

1, do not need pumping plant and pipe-line system, compact conformation, the efficient height does not need fluid is injected the old man,

Environmentally safe has been saved fluid simultaneously;

2, hand pump is provided with high-pressure side and low-pressure end, and setting prop is fast;

3, the rubber bag tank that is provided with, fluid are stored in it, prevent that pillar fluid when inclination and accumbency is excessive;

4, hand pump is located on the support body, has been increased its setting prop height, environment for use increases;

5, volume is little, in light weight, supporting capacity is big.

Four, description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is a hydraulic schematic diagram of the present utility model.

Five, the specific embodiment

As shown in the figure, a kind of internal-circulation type hydraulic prop comprises top cover 1, base 2, support body 3, hand pump 4, a plurality of one way valve 5, plunger 7, plunger barrel 9, overflow valve 6, safety valve 15, feather valve 16; Hand pump 4 is provided with high-pressure side 41 and low-pressure end 42; Support body 3 is arranged on the base 2, and inboard, support body 3 upper end is provided with plunger 7, and the upper end of plunger 7 is provided with top cover 1, is arranged with plunger barrel 9 outside the plunger 7, and plunger barrel 9 is arranged on the support body 3, and the inboard of support body 3 and plunger barrel 9 outsides form outer shoe cream room 11; Shoe cream room 10 in plunger 7 lower ends and plunger barrel 9 and support body 3 form; Support body 3 upper ends are provided with gland 13, and gland 13 is provided with air vent 14, and this air vent 14 communicates with the top of outer shoe cream room 11 and plunger barrel 9;

Outer shoe cream room 11 is connected with the high-pressure side 41 and the low-pressure end 42 of hand pump 4 respectively through one way valve I51, II52; Interior shoe cream room 10 is connected with the high-pressure side 41 and the low-pressure end 42 of hand pump 4 respectively through one way valve III53, IV54; Interior shoe cream room 10 and outer shoe cream room 11 are provided with feather valve 16 and safety valve 15 in parallel;

11 of the low-pressure end 42 of hand pump 4 and outer shoe cream rooms are provided with overflow valve 6.

Above-mentioned internal-circulation type hydraulic prop, one way valve 5, hand pump 4, feather valve 16, safety valve 15, overflow valve 6 are arranged on support body 3 bottoms.For strengthening its sealing effectiveness, be provided with rubber bag tank in the shoe cream room outside, fluid is stored in this rubber bag tank.

According to the actual conditions of down-hole, choose suitable supporting position.The internal-circulation type hydraulic prop is uprightly placed, with hand starting the piston that makes hand pump 4 is realized pumping then, under the effect of pressure reduction, open one way valve I51, the II52 of low pressure oil circuit, make outer shoe cream room 11 and interior shoe cream room 10 realize being communicated with.When pressure arrived to a certain degree, the low-pressure end 42 of hand pump 4 was not worked, only its high-pressure side 41 work, and system changes high-pressure oil passage over to, in like manner realizes continuing setting prop.When setting prop pressure reaches customer requirements, and guarantee supporting safety, so far finish setting prop.

When instantaneous pressure appearred in the coal seam, the fluid of interior shoe cream room 10 was communicated with outer shoe cream room 11 by safety valve 15, realization overflow and guarantee the safe handling of pillar.

Get final product with manually unclamping feather valve 16 when falling post, shoe cream room 10 and outer shoe cream room 11 are realized being communicated with in making, and realize falling post.

The utlity model has that volume is little, in light weight, bearing capacity is big, setting prop is fast, fall post facility, sealing Can be reliable, environmental protection, do not need pumping plant and the characteristics such as pipe-line system, convenient management.

Claims

1, a kind of internal-circulation type hydraulic prop comprises top cover (1), base (2), support body (3), hand pump (4), a plurality of one way valve (5), plunger (7), plunger barrel (9), overflow valve (6), safety valve (15), feather valve (16); Hand pump (4) is provided with high-pressure side (41) and low-pressure end (42); Support body (3) is arranged on the base (2), inboard, support body (3) upper end is provided with plunger (7), the upper end of plunger (7) is provided with top cover (1), the outer plunger barrel (9) that is arranged with of plunger (7), plunger barrel (9) is arranged on the support body (3), and the inboard of support body (3) and plunger barrel (9) outside form outer shoe cream room (11); Shoe cream room (10) in plunger (7) lower end and plunger barrel (9) and support body (3) form; Support body (3) upper end is provided with gland (13), and gland (13) is provided with air vent (14), and this air vent (14) communicates with the top of outer shoe cream room (11) and plunger barrel (9);

It is characterized in that: outer shoe cream room (11) is connected with the high-pressure side (41) and the low-pressure end (42) of hand pump (4) respectively through one way valve I, II (51,52);

Interior shoe cream room (10) is connected with the high-pressure side (41) and the low-pressure end (42) of hand pump (4) respectively through one way valve III, IV (53,54);

Interior shoe cream room (10) and outer shoe cream room (11) are provided with feather valve (16) and safety valve (15) in parallel; Be provided with overflow valve (6) between the low-pressure end (42) of hand pump (4) and outer shoe cream room (11).

2, internal-circulation type hydraulic prop according to claim 1 is characterized in that: one way valve (5), hand pump (4), feather valve (16), safety valve (15), overflow valve (6) are arranged on support body (3) bottom.