CN201202478Y - Single hydraulic prop - Google Patents

Abstract

A monomer hydraulic prop comprises a three-purpose valve and a movable column casing, and is characterized in that a horizontal through hole is arranged on the movable column casing; a cylindrical valve housing for loading the three-purpose valve is also welded on the movable column casing; the outer circle surface of the valve housing is a cylindrical surface, while an inner hole of the valve housing is matched with the three-purpose valve; the three-purpose valve is positioned inside the valve housing; the top and the bottom of the valve housing are provided with openings which are respectively communicated with an upper part cavity and a lower part cavity of the movable column casing; and an exhaust seal cover is arranged inside the upper part cavity of the movable column casing. The utility model is easy to use and is provided with simple structure, low production cost, light weight, strong support ability and high stability.

Description

A kind of hydraulic prop

Technical field: the utility model belongs to mining support technology scope, relates to a kind of modified hydraulic prop.

Background technology: at present, hydraulic prop has become one of main supporting product of coal in China coal-face with characteristics such as its supporting performance are good, easy to use.The hydraulic prop of prior art, its form of structure has multiple, wherein mainly is made up of top cover, extension spray lance, column cap, triple-use valve, handgrip body, oil cylinder, plunger tube, piston, back-moving spring and base a kind of.The high-pressure emulsion that injects from triple-use valve during operation enters a variable seal cavity of column cap, oil cylinder, plunger tube, base formation, when high-pressure emulsion enters the sealing space, and space enlargement, thus make plunger tube rise the shore supports top board.When high-pressure emulsion oppositely overflowed, under the effect of back-moving spring, plunger tube descended, then the pillar retraction.Though this hydraulic prop can be realized support action, there is following problem in actual applications: 1. structure more complicated, cost height.It has a column cap and an extension spray lance, and extension spray lance is connected with plunger tube by column cap, and offers valve opening on the column cap, and triple-use valve is installed; 2. weight ratio is bigger, requires great effort during use; 3. can not get hydraulic pressure in the extension spray lance and support, cause its stressed harshness, easy deformation influences the support performance of pillar, even can cause the accident.

Summary of the invention: the purpose of this utility model provides a kind of simple in structure, and low cost of manufacture is in light weight, and the hydraulic prop that support performance is good is in order to overcome the above-mentioned drawback of existing in prior technology effectively.This use is novel to be to improve to realize on the basis of prior art individual prop, it comprises triple-use valve, plunger tube, it is characterized in that offering on the plunger tube cross through hole, and be welded with one the dress triple-use valve valve pocket, this valve pocket becomes cylindrical shape, periphery is the face of cylinder, and endoporus and triple-use valve match, and said triple-use valve is put and is loaded in this valve pocket; Its upper and lower perforate is communicated with the upper chamber and the lower cavity of plunger tube respectively; Be equiped with the exhaust sealing lid in the upper chamber of said plunger tube.Its using method is identical with the prior art individual prop.Inject high-pressure emulsion by triple-use valve, the one, the following hole by the triple-use valve valve pocket enters the variable annular seal space that is made of valve pocket, plunger tube, oil cylinder and base, realizes that plunger tube is along the oil cylinder supporting that raises; The 2nd, the last hole by valve pocket enters by valve pocket, plunger tube and exhaust sealing lid and constitutes, and the cavity that is communicated with above-mentioned said variable annular seal space, and in working order down, the interior pressure-bearing of cavity helps improving greatly the support performance of pillar.

The utility model is simple in structure, and cost of production is low, and is in light weight, easy to use.Its enabling capabilities is strong simultaneously, and stability is high.

Description of drawings: Fig. 1 is a front view of the present utility model

Fig. 2 is the A-A sectional view among Fig. 1

The specific embodiment: accompanying drawing has provided a specific embodiment of the present utility model, and according to Fig. 1, shown in Figure 2,2 is plunger tubes among the figure, is set in the oil cylinder 3.Offer cross through hole on the plunger tube 2, and be welded with the valve pocket 4 of a dress triple-use valve, 4 one-tenth cylindrical shapes of this valve pocket, periphery is the face of cylinder, and endoporus and triple-use valve 5 match, and said triple-use valve 5 is put and is loaded in this valve pocket 4; The upper and lower hole 6 that all has of valve pocket 4 is communicated with the upper chamber and the lower cavity of plunger tube 2 respectively; Be equiped with exhaust sealing lid 7 in the upper chamber of plunger tube 2.During use, inject high-pressure emulsion by triple-use valve 5, the one, the following hole by triple-use valve valve pocket 4 enters the variable annular seal space that is made of valve pocket 4, plunger tube 2, oil cylinder 3 and base 1, the 2nd, the last hole by valve pocket 4 enters by valve pocket 5, plunger tube 2 and exhaust sealing lid 7 and constitutes, and the cavity that is communicated with above-mentioned said variable annular seal space, realize that plunger tube is along the oil cylinder supporting that raises.This pillar has structurally been realized the integration design of plunger tube, no matter be that the stressing conditions or the manufacturing cost of plunger tube of plunger tube all had important breakthrough than former design.The one, optimized the form of structure of column cap, also alleviated the weight of solid strut simultaneously.After column cap being changed into the triple-use valve cover, light beam head part weight reduces to present 0.73Kg by original 5.5Kg.The 2nd, change column cap into the triple-use valve cover, the hydraulic pressure that triple-use valve can be exported high-pressure emulsion arrives top board by top cover, has strengthened the stability of pillar greatly.The stressing conditions that the valve opening of valve is installed simultaneously is greatly improved, and under the situation of 2.5 meters of bearing heights, stressedly reduces to present 82.5KN by original 250KN.The 3rd, adopt floated know-why, the hydraulic pressure suspending power is directly acted on the top cover by the inner chamber of pillar, the hydraulic pressure suspending power has been shared 67% of working resistance, make plunger tube in axial stressed 33% of the working resistance that only is, improve the stability and the safety of pillar, also improved the bearing height and the supporting capacity of pillar greatly.

Claims (1)

1. A kind of hydraulic prop, comprise triple-use valve (5), plunger tube (2), it is characterized in that offering cross through hole on the plunger tube (2), and be welded with one the dress triple-use valve valve pocket (4), this valve pocket (4) becomes cylindrical shape, periphery is the face of cylinder, and endoporus and triple-use valve (5) match, and said triple-use valve (5) is put and is loaded in this valve pocket (4); The upper and lower hole (6) that all has of valve pocket (4), upper chamber and the lower cavity with plunger tube (2) is communicated with respectively; Be equiped with exhaust sealing lid (7) in the upper chamber of said plunger tube (2).

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