CN201187311Y

CN201187311Y - External pouring type single hydraulic prop

Info

Publication number: CN201187311Y
Application number: CNU2008200770317U
Authority: CN
Inventors: 岳国强
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-04-19
Filing date: 2008-04-19
Publication date: 2009-01-28
Anticipated expiration: 2018-04-19

Abstract

The utility model discloses an external injection-type single hydraulic prop which comprises a top cover (1), an oil cylinder (4), a plunger (2), a handle (3), a pedestal (6), a return spring (5) and a three-way valve (7). A hollow piston (8) is arranged at the lower end of the plunger (2). A hollow core tube (9) is arranged in the center of the cavity of the plunger (2). The lower end of the hollow core tube (9) is connected with the central hole (81) of the hollow piston (8). The upper end of the core tube (9) is arranged on the valve seat (71) of the three-way valve (7). The return spring (5) is arranged inside the core tube (9). By arranging the core tube inside the plunger, the cavity volume of the plunger is reduced, the response to lifting and descending the prop is sensitive, and the consumption of an emulsifier is reduced.

Description

Outside injection type hydraulic pillar

Technical field

The utility model relates to a kind of mining support apparatus, especially a kind of outside injection type hydraulic pillar.

Background technology

The channel of coal mining working surface support apparatus is one of mine imperative equipment.The support apparatus that generally uses in the colliery is an outside injection type hydraulic pillar at present, outside injection type hydraulic pillar is to carry out support just by the pressure liquid that export at the default emulsion station of work plane, when roof weighting and unloading, by the triple-use valve on it emulsion is released, pillar descends, carry out support just, circulation successively with the pressure liquid at emulsion station again when repeating work.China Patent No. 97107063.6 is disclosed to be exactly this class outside injection type hydraulic pillar, its structure comprises top cover, the post of living, handgrip body, oil cylinder, base, back-moving spring, triple-use valve and guide valve, seal etc., and its operating principle is to utilize the seal chamber of a variable-volume to make under the effect of working media that post alive is flexible up and down to carry out work.Seal chamber is surrounded by top cover, handgrip body, the column outer wall of living, oil cylinder inner wall, base, triple-use valve.The emulsion that transports from the emulsion station during operation is by triple-use valve fluid injection in the pillar seal chamber, emulsion enters the annular housing that column outer wall alive and oil cylinder inner wall form through handgrip body radial direction through hole, and the radial direction through hole from the post lower end of living enters the pillar annular seal space again, like this along with the injection of emulsion, it is big that seal chamber becomes, the post of living rises, and the shore supports top board is when falling post, emulsion oppositely releases, seal chamber diminishes, and the post of living reduces, the pillar withdrawal.The every injection of emulsion and releasing once, pillar be setting prop and fall post once just, finishes a working cycles.

The problem that this outside injection type hydraulic pillar exists in actual applications is: with the inner chamber of a whole post alive part as seal chamber, for the emulsion turnover, after emulsion need all be full of the post inner chamber of living during setting prop, continue to inject emulsion, the post of living could rise.Like this, because the post intracavity space of living is big, the emulsion that inner chamber accumulates is many, and weight is big, and setting prop, the reaction speed of falling post are slow, and the consumption of emulsion is also big.

Summary of the invention

The purpose of this utility model is exactly in order to overcome the above problems, and a kind of post cavity volume of living that reduces is provided, the outside injection type hydraulic pillar that make setting prop, fall being quick on the draw of post, the consumption of emulsion reduces.

The utility model outside injection type hydraulic pillar, comprise top cover, oil cylinder, post alive, handgrip body, base, back-moving spring and triple-use valve, the lower end of post alive is provided with hollow piston, the lumen centers of post alive is provided with hollow core pipe, the lower end of core pipe links to each other with the centre bore of hollow piston, the upper end of core pipe is located on the valve seat of triple-use valve, and back-moving spring is located in the core pipe.

When using the utility model, by triple-use valve fluid injection in pillar, the high-pressure emulsion that is come by the work plane feed pipe enters cavity between core pipe and piston and base by triple-use valve, along with the injection of liquid, the post of living rises shore supports, at this moment, back-moving spring is elongated; When post falls in pillar, open the feather valve in the triple-use valve, emulsifying liquid releases from triple-use valve by the core pipe, and the post of living bounces back under deadweight and action of reset spring.The every injection of liquid and releasing once, pillar just supports and falls post once, and pillar has just been finished a working cycles like this.Because the utility model has increased the core pipe at the post inner chamber of living; change original post inner chamber whole alive fluid injection the inner fluid injection of into core pipe; the volume of seal chamber is reduced; reduce the liquid storage in the post alive, reduced the compression ratio of inner chamber liquid, also alleviated the weight of pillar self; improve setting prop, fallen the sensitivity of post; and reduced the discharging of emulsion, and reduced the consumption of water and emulsion, help protecting environment.Simultaneously, because the post inside of living has increased the core pipe, the compressive strength of pillar, flexural strength are increased.

Description of drawings

Fig. 1 is the utility model structural representation.

The specific embodiment

As shown in Figure 1, the utility model outside injection type hydraulic pillar mainly is made up of top cover 1, live post 2, handgrip body 3, oil cylinder 4, back-moving spring 5, base 6, triple-use valve 7 etc., triple-use valve 7 and valve seat 71 thereof are fixed on the upper end of post 2 alive, constitute the hydraulic control system of hydraulic prop.Hollow piston 8 is equipped with in lower end at the post 2 of living, the center of hollow piston 8 has centre bore 81, post alive 2 lumen centers between the valve seat 71 of hollow piston 8 and triple-use valve 7 are equipped with core pipe 9, core pipe 9 is a hollow section, back-moving spring 5 is contained in the core pipe 9, and the lower end of core pipe 9 links to each other with the centre bore 81 of hollow piston 8, and the upper end of core pipe 9 is fixed on the valve seat 71 of triple-use valve 7, the upper end of back-moving spring 5 also is installed on the valve seat 71 of triple-use valve 7, and the lower end is installed on the base 6.

Claims

1, a kind of outside injection type hydraulic pillar, comprise top cover (1), oil cylinder (4), post (2) alive, handgrip body (3), base (6), back-moving spring (5) and triple-use valve (7), it is characterized in that: the lower end of the post (2) of living is provided with hollow piston (8), the lumen centers of post alive (2) is provided with hollow core pipe (9), the lower end of core pipe (9) links to each other with the centre bore (81) of hollow piston (8), the upper end of core pipe (9) is located on the valve seat (71) of triple-use valve (7), and back-moving spring (5) is located in the core pipe (9).