CN2342167Y

CN2342167Y - Single hydraulic prop

Info

Publication number: CN2342167Y
Application number: CN 97230176
Authority: CN
Inventors: 黄宗文; 赵志立; 张德伟; 马德发
Original assignee: TECHNOLOGICAL CENTRE PINGDINGSHAN COAL (GROUP) CO Ltd
Current assignee: TECHNOLOGICAL CENTRE PINGDINGSHAN COAL (GROUP) CO Ltd
Priority date: 1997-12-15
Filing date: 1997-12-15
Publication date: 1999-10-06
Anticipated expiration: 2007-12-15

Abstract

The utility model discloses a single hydraulic prop with emulsion medium. An inner lining circular ring 2 is arranged on the upper part position of a piston 1, and the surface of the outer diameter of the inner lining circular ring 2 is tightly combined with the surface of the inner diameters of the piston 1 and a movable prop 3, so that a passage through which the emulsion medium enters a sealing ring which is arranged between the connecting segment of the piston 1 and the movable prop 3 is blocked, leakage phenomenon which is caused by that the surface of the internal diameter of the movable prop 3 and the outer surface of the piston are corroded by the emulsion at the point of the sealing ring is avoided, and the rating support force of the single hydraulic prop is ensured not to be reduced.

Description

A kind of hydraulic prop

The utility model relates to a kind of pillar, especially a kind of hydraulic prop with emulsifiable solution medium.

At present, in construction in the employed hydraulic prop, live around post and emulsified liquid in the piston cavity be easy to carry out the transition to seal ring in its gap along the gap of work post and piston junction plane, in the course of time, emulsified liquid can erode away a circle groove with the column internal diameter alive surface and the outer surface of piston at sealing circle place, cause the sealing circle to lose efficacy, after making emulsified liquid in post alive and the piston cavity by the sealing circle, overflow from the binding site of cylinder body upper end with handgrip, thus the supporting force of reduction pillar.The remedial measure of field by using is that the post alive that will be corroded partly amputates, and the post of living is moved down, but this way will make the supporting height of pillar progressively reduce, and cause certain waste of material.

The utility model provides a kind of can protect the column internal diameter alive surface at the seal ring place that lives between post and the piston and the hydraulic prop that outer surface of piston is not subjected to the emulsified liquid corrosion.

The technical solution of the utility model is: by cylinder body, triple-use valve, post alive, post guide ring alive, the spacing steel wire of post alive, dust ring, piston, the piston guide ring, piston packing, the piston anti-extrusion ring, piston connects steel wire, the leather cup anti-extrusion ring, y-type seal ring, Returnning spring, base, the base seal ring, the base anti-extrusion ring, base connects steel wire, handgrip, handgrip connects in the hydraulic prop of steel wire composition, upper position at piston is provided with a liner garden ring, the external diameter of liner garden ring upper half part is made identical with the internal diameter of the post of living, the external diameter surface of liner garden ring upper half part is surperficial for combining closely with the column internal diameter of living; The external diameter of liner garden ring lower half portion is made identical with the internal diameter of piston, and extend in the hole, internal diameter garden of piston, the external diameter surface of liner garden ring lower half portion and the inside diameter surface of piston are for combining closely; Encircling the circle step plane that upper and lower two-part external diameter difference forms by the liner garden is parallel combination with the last Transverse plane of piston; The internal diameter of liner garden ring is made hole greater than the Returnning spring external diameter, can from the inner diameter hole of liner garden ring, pass to guarantee Returnning spring.

For guaranteeing the sealing effect of liner garden ring, it is that a rigid support skeleton overall structure dimerous is laid in rubber-like colloid and inside that liner garden ring is made by appearance.The shape of its support framework is identical with the profile of liner garden ring, makes liner garden ring be difficult for taking place bulk deformation in use.

The utility model is compared with the hydraulic prop that uses in construction at present, the column internal diameter alive surface and the emulsified corrosion of outer surface of piston at seal ring place between post alive and the piston linkage section have been avoided, avoided the phenomenon of leakage in the gap between post alive and the piston, the specified supporting force of hydraulic prop can not reduced, and the column length alive of hydraulic prop can not reduced because of being corroded, guaranteed that the supporting height of pillar can not reduce.

Below in conjunction with accompanying drawing the utility model embodiment is described in further detail.

Fig. 1 is principal section figure of the present utility model.

Connect steel wire 21, handgrip 22, handgrip and connect in the hydraulic prop that steel wire 23 forms connecting steel wire 15, leather cup anti-extrusion ring 16, y-type seal ring 17, Returnning spring 4, base 18, base seal ring 19, base anti-extrusion ring 20, base by cylinder body 7, triple-use valve 8, the post 3 of living, the post guide ring 9 of living, the spacing steel wire 10 of post of living, dust ring 11, piston 1, piston guide ring 12, piston packing 13, piston anti-extrusion ring 14, piston as shown in Figure 1, promptly a liner garden is set on the top of piston 1 and post 3 linkage sections of living and encircles 2 at the upper position of piston 1.Wherein, the outside of liner garden ring 2 is flexible colloids 5, and inside is rigid support skeleton 6, and the shape of support framework 6 is identical with the profile of liner garden ring 2.The external diameter surface of upper half part of liner garden ring 2 is combined closely with the inside diameter surface of the post 3 of living; Lower half portion of liner garden ring 2 extend in the inner diameter hole of piston 1, and the inside diameter surface of its external diameter surface and piston is combined closely; Encircling the circle step plane that 2 upper and lower two-part external diameter differences form by the liner garden is pressed on the circle plane of piston 1 upper end.For guarantee that Returnning spring 4 can pass from the internal diameter of liner garden ring 2, the internal diameter of liner garden ring 2 is greater than the external diameter of Returnning spring 4.When hydraulic prop in when work, emulsifiable solution medium in the inner chamber that the piston 1 and the post 3 of living constitute has a radially outer pressure to liner garden ring 2, it is tightr to make that the external diameter surface of liner garden ring 2 combines with the inside diameter surface of piston 1 and work post 3, thereby cut off the outlet that emulsifiable solution medium enters into piston packing 13 places, reached the purpose of the emulsified corrosion of outer surface of the inside diameter surface of the post alive 3 that prevents piston packing 13 places and piston 1.

Claims

1, a kind of by cylinder body, triple-use valve, post alive, post guide ring alive, the spacing steel wire of post alive, dust ring, piston, the piston guide ring, piston packing, the piston anti-extrusion ring, piston connects steel wire, the leather cup anti-extrusion ring, y-type seal ring, Returnning spring, base, the base seal ring, the base anti-extrusion ring, base connects steel wire, handgrip, handgrip connects the hydraulic prop that steel wire is formed, it is characterized in that: the upper position at piston [1] is provided with a liner garden ring [2], the external diameter of liner garden ring [2] upper half part is identical with the internal diameter of the post [3] of living, the external diameter surface of liner garden ring [2] upper half part and post [3] inside diameter surface of living are for combining closely, the external diameter of liner garden ring [2] lower half portion is identical with the internal diameter of piston [1], liner garden ring [2] lower half portion extend in the hole, internal diameter garden of piston [1], the external diameter surface of liner garden ring [2] lower half portion and the inside diameter surface of piston [1] are for combining closely, on liner garden ring [2], the circle step plane that following two-part external diameter difference forms is parallel combination with the last Transverse plane of piston [1], and the internal diameter of liner garden ring [2] is greater than the external diameter of Returnning spring [4].

2, hydraulic prop according to claim 1 is characterized in that: liner garden ring [2] is that the flexible colloid [5] and the inner support framework [6] that is laid in are formed by appearance, and the shape of support framework [6] is identical with the profile of liner garden ring [2].