CN85200085U

CN85200085U - Outer filling single-pole hydraulic prop

Info

Publication number: CN85200085U
Application number: CN 85200085
Authority: CN
Inventors: 李继同
Original assignee: Individual
Current assignee: Individual
Priority date: 1985-04-01
Filing date: 1985-04-01
Publication date: 1985-11-10

Abstract

The utility model relates to an external injection type single hydraulic prop which belongs to a roof supporting device on a coalface and aims to simplify the structure and reduce links of the processing technology. The utility model has the advantages of low cost, simple structure and easy fabrication, and the movable prop assembly of the hydraulic prop of the utility model is formed by the detachable connection of only a top cover in which a three purpose valve core is arranged and a movable prop casing formed by the cold processing of a seamless steel tube. The utility model is suitable for the roof support on a stope with the mining height within 2.2 metres, and the proposal that a piston is cancelled and a guiding ring and a seal ring are arranged on the moving prop casing directly is suitable for single hydraulic props of various types.

Description

Outer filling single-pole hydraulic prop

The utility model belongs to coal-face roof timbering device.

External existing many kinds of outside injection type hydraulic pillar.As Britain's road ladder outside injection type hydraulic pillar, West Germany's Sa Wurz base takes off HS40ZL type outside injection type hydraulic pillar, Soviet Union Γ BC and Γ BT type outside injection type hydraulic pillar.The domestic HYC6 type external poured hydraulic prop of also manufacturing experimently, also mass production approved product DZ type external poured hydraulic prop.These pillars generally all are made up of top cover, welding post alive, oil cylinder, handgrip, piston, guide ring, sealing ring, back-moving spring, base, triple-use valve etc.Wherein welding post alive is welded by column cap and plunger tube; Guide ring, sealing ring all are installed on the piston, again piston are installed to welding post alive lower end.Triple-use valve is made up of left and right sides valve cylinder and triple-use valve core.Top cover, welding post alive, piston, guide ring, sealing ring constitute post assembly alive together, and are installed on the column cap, and structure is complicated, and part is more, and not only processing capacity is big, also to weld, and the car weld seam, the operations such as pressing test of fetching water, cost is higher.

The purpose of this utility model is simplified structure, reduces component, reduces the processing technology link, reduces cost, and produces the good outside injection type hydraulic pillar of a kind of performance.

The utility model is made up of top cover (1), triple-use valve core (2), handgrip (3), plunger tube (4), oil cylinder (5), guide ring (6), sealing ring (7), back-moving spring (8) and base main parts size such as (9) as shown in drawings.

The utility model has replaced the top cover of existing hydraulic prop such as DZ type with top cover (1), column cap, left side valve cylinder and four parts of right valve cylinder, cooperate with back timber with two claws above it, guaranteeing that top cover has under the prerequisite of enough rigidity and intensity, triple-use valve core (2) directly is installed in its transverse holes, top cover adopts being connected of detachable sealing with its axial blind hole with plunger tube (4), as connecting with the square steel silk, and save piston, be cut into groove on the garden outside the plunger tube lower end guide ring (6) directly is installed, sealing ring (7) is to reach motion guide and the sealing between plunger tube (4) and the oil cylinder (5).

Advantage of the present utility model is to have replaced with a top cover top cover, column cap, left valve cylinder, the right valve cylinder of original structure, and cancelled welding between column cap and plunger tube, and cancelled piston again simultaneously, simplify the structure, reduce part, reduced activitiess such as welding, car weld seam, the hydrostatic test; Because the plunger tube external diameter levels off to the oil cylinder internal diameter, increased the bending rigidity and the intensity of plunger tube greatly again.

The utility model is made easily because simple in structure, and every pillar dozens of yuan that can reduce cost is considered China's manufacture in every year, the economic benefit highly significant.

The utility model is applicable to 2.2 meters roof timberings with interior coal-face of mining height, and the cancellation piston is directly installed the pillar that the scheme of guide ring, sealing ring is suitable for the whole specifications of other model on plunger tube.

Claims

1, a kind of outside injection type hydraulic pillar of being made up of top cover [1], triple-use valve core [2], handgrip [3], plunger tube [4], oil cylinder [5], guide ring [6], sealing ring [7], back-moving spring [8] and base main parts size such as [9], the post assembly that it is characterized in that living only is equipped with the top cover [1] of triple-use valve core [2] and the plunger tube [4] of guide ring [6] and sealing ring [7] directly is installed with detachable being formed by connecting in the groove of garden outside the lower end by an inside.

2, it is characterized in that according to the described outside injection type hydraulic pillar of claim 1 plunger tube (4) and inside is equipped with detachable connection the between the top cover (1) of triple-use valve core (2), adopt the square steel silk to connect.

3, it is characterized in that according to the described outside injection type hydraulic pillar of claim 1 top cover (1) has an axial blind hole and detachable being tightly connected of plunger tube, have a transverse holes that the triple-use valve core is installed again, its end face has two claws to cooperate with back timber.