CN203383837U - Core shaft type flexible guide single hydraulic prop - Google Patents

Abstract

A core shaft type flexible guide single hydraulic prop comprises a base, an oil cylinder, a movable cylinder, a handlebar body, a three-use valve and a top cover, wherein the oil cylinder is connected with the base through a connecting steel wire, the movable cylinder is in vertical sliding fit with the bottom of the oil cylinder, the handlebar body is connected with the oil cylinder, the three-use valve is arranged on the handlebar body, and the top cover is hinged to the movable cylinder and is provided with a column jaw and a horizontal bowl. The core shaft type flexible guide single hydraulic prop is characterized in that a core is arranged in the movable cylinder, the lower portion of the core is connected with the base through a resetting spring, a guide ring is fixed to the movable cylinder, and the movable cylinder is in sealing connection with the core. The core shaft type flexible guide single hydraulic prop has the advantages that the core shaft type structure is adopted, the core is sealed, and the strength of the prop is enhanced; due to the fact that the core is fixedly connected with the movable cylinder, the movable cylinder can achieve the guide function through the guide ring, the precision of the inner wall of a cylinder barrel is improved, the prop cannot be bent in the using process, and the effects of being large in bearing capacity, strong in unbalance loading resisting capacity, large in working stroke and wide in using range can be achieved by increasing the thickness of the wall of the oil cylinder.

Description

A kind of mandrel type flexible guiding hydraulic prop

Technical field

The utility model belongs to the coal mine machinery equipment field, relate to a kind of hydraulic prop, a kind of hydraulic prop that can realize the flexible guiding function of mandrel type particularly, be applicable to roof timbering and the end support of stope working surface of coal mines, because its supporting capacity is large, offset load resistance is strong, impulse stroke is large, the scope of application is wide, thereby it can be applicable to girdle and thick coal seam work plane.

Background technology

Hydraulic prop generally all comprises base, oil cylinder, live cylinder and top cover, and the cylinder of living is realized the function fluctuated by the oil pressure in oil cylinder.But hydraulic prop is originally existing following shortcoming aspect structure, guiding: 1) traditional floated type single hydraulic prop stay links together by seal cover and the post of living, and wall thickness is thinner, causes column strength low; 2) live between post and oil cylinder without guiding, fit clearance is large, easily crooked in use procedure.

Summary of the invention

The utility model is in order to overcome the defect of prior art, designed a kind of mandrel type flexible guiding hydraulic prop, by the mandrel type structure, the cylinder of living can realize that by the guiding of guide ring straight line fluctuates, can be because of in location free procedure, because bending causes the stress of pressure, concentrating the application life of reducing hydraulic prop.

The technical solution of the utility model is, a kind of mandrel type flexible guiding hydraulic prop, comprise base, the oil cylinder be connected with base by connecting steel wire, form and slide up and down the cylinder alive coordinated with the oil cylinder bottom, the handle body be connected with oil cylinder, be contained in the triple-use valve on handle body, and hinged with cylinder alive, as to there is post pawl and level bowl top cover, key is: in the cylinder of living, be provided with fuse, the fuse bottom is connected with base by back-moving spring, on the cylinder of living, is fixedly installed guide ring, and live cylinder and fuse are tightly connected.

The beneficial effects of the utility model are, adopt the mandrel type structure, the fuse sealing, strengthened the intensity of pillar, because fuse is fixedly connected with the cylinder of living, the cylinder of living can be realized guide function by guide ring, the inner wall of cylinder precision improves, guaranteed that the use procedure B-C post can be not crooked, and by increasing the oil cylinder wall thickness, can realize that supporting capacity is large, offset load resistance is strong, impulse stroke is large, the effect that the scope of application is wide, can greatly save pillar raw material machine cost simultaneously, enhance productivity, strengthen coal mine support safety and reliability, will bring great economic benefit and social benefit.

The accompanying drawing explanation

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

1 represents base, and 2 represent oil cylinder, 3 representative cylinder alive, and 4 represent triple-use valve, and 5 represent top cover, and 6 represent fuse, and 7 represent back-moving spring, and 8 represent guide ring, and 9 represent handle body.

The specific embodiment

A kind of mandrel type flexible guiding hydraulic prop, comprise base 1, the oil cylinder 2 be connected with base 1 by connecting steel wire, form and slide up and down the cylinder alive 3 coordinated with oil cylinder 2 bottoms, the handle body 9 be connected with oil cylinder 2, be contained in the triple-use valve 4 on handle body 9, and hinged with cylinder 3 alive, as to there is post pawl and level bowl top cover 5, key is: in the cylinder 3 of living, be provided with fuse 6, fuse 6 bottoms are connected with base 1 by back-moving spring 7, be fixedly installed guide ring 8 on cylinder 3 alive, the cylinder 3 of living is tightly connected with fuse 6.

Be fixedly installed guide ring 8 on cylinder 3 alive, in the utility model, top cover 5 is comprised of level bowl, pin and packing ring, that balkstone pressure is delivered to the part on pillar, utilize the post pawl on top cover to block back timber, in the time of can preventing roof weighting, pillar slips, and top cover is connected with the cylinder of living with three elasticity garden pins.The cylinder 3 of living is hydraulic prop top pressure-bearing rod members, and top board and rock are passed to oil cylinder 2 and base 1 to the pressure of pillar through it.Handle body 9 is contained on oil cylinder 2 by connecting steel wire, is convenient to the pillar carrying and reclaims.Also to live cylinder 3 upper guide to plunger tube and spacing element simultaneously.In handle body 9, dust ring is housed, when the cylinder 3 of living descends, the fouls such as coal dust that dust ring will be lived on cylinder 3 are wiped off and are prevented that dirt from entering cylinder cavity.The triple-use valve that triple-use valve 4 is comprised of one way valve, feather valve and safety valve is the heart of hydraulic prop.It is easy to replace and maintain that three kinds of valves integrate, and triple-use valve 4 utilizes the screw thread on the valve cylinder of left and right to be contained on the pillar handle body.Oil cylinder 2 is pillar bottom bearing parts, and the roof pressure of stope is passed to base 1 and base plate through it, and base 1 adopts and is connected the steel wire connection with oil cylinder 2.Back-moving spring 7 can accelerate the pillar decrease speed.7 one of back-moving springs hang on fuse 6, and other end hangs on base 1, and make it have certain pretightning force.

The utility model in the specific implementation, the hydraulic prop that pillar is outside feed flow, the required working solution of pillar in tunnel pumping plant through supplies such as high-pressure rubber pipe fluid injection guns.During use, fluid injection gun is inserted in triple-use valve 4 liquid injection holes, the fluid injection gun handgrip of holding with a firm grip, high pressure liquid flows into the pillar cavity of resorption, and the cylinder 3 of living raises.When mine pressure surpasses pillar nominal operation load, the highly pressurised liquid in pillar is opened the safety valve in triple-use valve 4, liquid spill, under pillar, contract, chamber pressure reduces, when the suffered load of pillar during lower than nominal operation load, safety valve cuts out, and inner chamber liquid stops excessive.During the work plane prop drawing, will unload handgrip and insert in triple-use valve 4 unloading holes, and rotate the unloading handgrip, and open the feather valve in triple-use valve, pillar inner chamber emulsion flows into the old man, and cylinder 3 retraction under deadweight and action of reset spring of living reaches and falls the post purpose.

Claims (1)

1. a mandrel type flexible guiding hydraulic prop, comprise base (1), the oil cylinder (2) be connected with base (1) by connecting steel wire, form and slide up and down the cylinder alive (3) coordinated with oil cylinder (2) bottom, the handle body (9) be connected with oil cylinder (2), be contained in the triple-use valve (4) on handle body (9), and hinged with the cylinder (3) of living, top cover (5) with post pawl and level bowl, it is characterized in that: in the cylinder (3) of living, be provided with fuse (6), fuse (6) bottom is connected with base (1) by back-moving spring (7), be fixedly installed guide ring (8) on cylinder alive (3), the cylinder (3) of living is tightly connected with fuse (6).

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