CN201334913Y - Exhaust single hydraulic prop - Google Patents

Abstract

The utility model relates to an exhaust single hydraulic prop, which comprises a top cover, a sealing cover, a valve seat, a three-purpose valve, an oil cylinder, a movable column, a base, a reset spring, an anti-dust ring, a retaining ring, a Y-shaped ring, a guide ring, an O-shaped ring and a connecting steel wire, wherein, elastic cylindrical pins which are fixedly connected are arranged among the top cover, the movable column and the sealing cover; the valve seat is connected with the outer wall of the oil cylinder through the connecting steel wire; a step hole which is communicated with the movable column is formed at the center of the sealing cover; and an exhaust valve for facilitating the exhaust of gas in the movable column is arranged in the step hole. When the hydraulic prop works, air in a cylinder body can be exhausted through the exhaust valve; when the air is completely exhausted, high-pressure liquid in the cylinder body can automatically support a steel ball to lead to steel ball to come into contact with a sealing ring at the upper end to close the exhaust valve, thereby ensuring that the liquid in the cylinder body cannot overflow, greatly reducing the erosion of the inner surface of the movable column by the high-pressure gas and further ensuring the working pressure of the liquid in a cavity. The exhaust single hydraulic prop has the advantages of simple structure, easy exhaust, good using effect and wide practicality.

Description

The exhaust hydraulic prop

Technical field

The utility model relates to a kind of hydraulic prop, especially relates to a kind of mining exhaust hydraulic prop.

Background technology

Mine individual hydraulic prop is the important support apparatus of colliery conventional face and end support.It has advantages such as safety factor height, stroke is big, setting load is big, is widely used in the supporting of mine working face.Especially floated hydraulic prop is used more extensive.But also exist following unsatisfactory part:

1, pillar does not have exhaust plant, gas in the cylinder body can only fall its level before use, relying on cylinder body discharges during topping up repeatedly, and the part residual gas can only be stayed in the cylinder, during the hydraulic prop top support plate, the gas of cylinder interior becomes pernicious gas under the pressure of gases at high pressure, it produces bigger corrosion to the life-span of seal and the post inner surface of living, thereby influences hydraulic prop application life.

2, triple-use valve handgrip body is placed on the top of cylinder body, and during operator's prop drawing, custom ties down handgrip with wire rope and is put into pillar, causes the pillar bending easily.

3, the pillar discharge opeing is not thorough, because pillar inner chamber relative closure, the oil cylinder of pillar and the difficult discharge of liquid between the post of living so not only cause the corrosion of pillar component, and, bring certain trouble to transportation because of liquid in the pillar flows out by the fluid injection through hole in transit.

Summary of the invention

The purpose of this utility model is at the weak point in the prior art, provides a kind of simple in structure, easily exhaust, the exhaust hydraulic prop that result of use is good.

For achieving the above object, the technical solution of the utility model: comprise top cover, seal cover, valve seat, triple-use valve, oil cylinder, live post and base, also comprise back-moving spring, dust ring, back-up ring, Y shape circle, guide ring, O shape circle and connect steel wire; Top cover is fixed on the upper end of post alive, seal cover is fixed in the hole of post alive upper end by sealing ring, be provided with fixedly connected elastic cylindrical pin between top cover, post alive and the seal cover, valve seat links to each other with the outer wall of oil cylinder by connecting steel wire, described seal cover center is provided with the stepped hole that communicates with the post of living, and is provided with the outlet valve of being convenient to discharge gas in the post alive in the stepped hole.

Described outlet valve comprises steam vent, and the packing ring, the sealing ring that are located at successively in the stepped hole of steam vent below reach fixedly swivel nut, fixedly are provided with the steel ball that matches with its through hole in the swivel nut; Described packing ring is a metal washer, and its center has the centre bore that equates with steam vent; The external diameter of described fixedly swivel nut is connected with the bottom thread of stepped hole.

The utility model has been installed outlet valve owing to covering at the column sealing of living, compared with prior art, hydraulic prop is when work, rising along with the post of living, air in the cylinder body can be discharged by outlet valve, and after air had been arranged, the highly pressurised liquid in the cylinder body held up steel ball with the sealing ring of upper end automatically and contacts, make exhaust valve closure, guarantee that the liquid that can not in the cylinder body overflows.Along with the increase of fluid pressure, the sealing effectiveness of outlet valve is better, has significantly reduced gases at high pressure to the erosion of post inner surface of living, and has guaranteed the operating pressure of intracavity liquid.After the pillar pass the test finished, with pillar placements of droping to the ground, this moment, outlet valve can be used for draining raffinate in the pillar, thereby had avoided raffinate to corrode pillar.Owing to removed the handle on the valve seat, can avoid the operator directly to pull in addition, avoid the pillar bending that causes because of operation with wire rope.It is simple in structure, easily exhaust, and result of use is good, has practicality widely.

Description of drawings

Fig. 1 is a structure chart of the present utility model;

Fig. 2 is the structure enlarged drawing of the local A of Fig. 1.

Among the figure: 1-top cover, 2-seal cover, 3-outlet valve, 3-1-steam vent, the 3-2-packing ring, the 3-3-sealing ring, 3-4-is swivel nut fixedly, the 3-5-steel ball, the 4-valve seat, 5-triple-use valve, 6-oil cylinder, 7-post alive, 8-base, 9-back-moving spring, the 10-dust ring, 11-back-up ring, 12-Y shape circle, the 13-guide ring, 14-O shape circle, 15-connects steel wire.

The specific embodiment

The utility model will be further described below in conjunction with the embodiment in the accompanying drawing:

Shown in Figure 1, oil cylinder 6 is fixed in the base 8, the post 7 of living is inserted in the oil cylinder 6, the junction of its extending area and oil cylinder 6 is provided with valve seat 4, in post 7 upper openings of living seal cover 2 is housed, and the top cover 1 that is interlocked with it is equipped with on its top, between top cover 1, post 7 alive and the seal cover 2 fixedly connected elastic cylindrical pin is housed, be provided with back-moving spring 9 in the post 7 alive, the bottom of back-moving spring 9 is articulated on the retainer ring at base 8 middle parts, and the top is articulated in is fixed in seal cover 2 center bottom.The centre of seal cover 2 has the stepped hole that communicates with the post 7 of living, and is provided with the outlet valve 3 of being convenient to discharge gas in the post 7 alive in the stepped hole.Shown in Figure 2, outlet valve 3 comprises steam vent 3-1, and the packing ring 3-2, the sealing ring 3-3 that are located at successively in the stepped hole of steam vent 3-1 below reach fixedly swivel nut 3-4, fixedly are provided with the steel ball 3-5 that matches with its through hole in the swivel nut 3-4.Packing ring 3-2 is a metal washer, and its center has the centre bore that equates with steam vent 3-1.Fixedly the external diameter of swivel nut 3-4 is connected with the bottom thread of stepped hole.Valve seat 4 is with one less pipe is vertical is connected by one section short circular tube external wall, at short pipe and roundlet pipe infall some radial direction through hole are arranged, be communicated with two tube cavities and oil cylinder 6 inner chambers, and connection triple-use valve 5, triple-use valve is installed in 4 the little pipe, the short round tube inner wall of valve seat 4 has some step troughs, in last ladder and the downstairs hole ring-shaped groove is arranged all, and its upper end inwall is connected and fixed with oil cylinder 6 outer walls by dust ring 10, back-up ring 11, Y shape circle 12, guide ring 13, O shape circle 14 and connection steel wire 15.So just formed by top cover 1, seal cover 2, live post 7, back-moving spring 9, oil cylinder 6, valve seat 4, seal, triple-use valve 5 and base 8 formed seal chambers, when liquid when triple-use valve 5 injects, thereby the volume that can change cavity is realized the flexible work of hydraulic prop.When hydraulic prop was worked, post 7 was up along with living, and the air on cylinder body 6 tops is just discharged from steam vent 3-1, had effectively guaranteed the design pressure of hydraulic prop, played the effect of safety support.After the gas in the cylinder body 6 had been arranged, highly pressurised liquid held up steel ball 3-5 automatically and contacts with sealing ring 3-3, and outlet valve 3 is closed, and liquid that can not flows out.Along with the increase of liquid pressure, sealing effectiveness is better, and liquid that can not overflows and contaminated environment.Steel ball normal condition in the outlet valve sinks to fixedly on the swivel nut, and this moment, outlet valve was in the state of opening, and hydraulic prop is when work, and along with the rising of the post of living, yet the air in the cylinder body is from discharging by steam vent smoothly.

Claims (4)

1, a kind of exhaust hydraulic prop, comprise top cover (1), seal cover (2), valve seat (4), triple-use valve (5), oil cylinder (6), live post (7) and base (8), also comprise back-moving spring (9), dust ring (10), back-up ring (11), Y shape circle (12), guide ring (13), O shape circle (14) and connect steel wire (15); Top cover (1) is fixed on the upper end of post alive (7), seal cover (2) is fixed in the hole of post alive (7) upper end by sealing ring, be provided with fixedly connected elastic cylindrical pin between top cover (1), post (7) alive and the seal cover (2), valve seat (4) links to each other with the outer wall of oil cylinder (6) by connecting steel wire, it is characterized in that: described seal cover (2) center is provided with the stepped hole that communicates with the post (7) of living, and is provided with the outlet valve (3) of being convenient to discharge the interior gas of post alive (7) in the stepped hole.

2, exhaust hydraulic prop according to claim 1, it is characterized in that: described outlet valve (3) comprises steam vent (3-1), the packing ring (3-2), the sealing ring (3-3) that are located at successively in the stepped hole of steam vent (3-1) below reach fixedly swivel nut (3-4), fixedly are provided with the steel ball (3-5) that matches with its through hole in the swivel nut (3-4).

3, exhaust hydraulic prop according to claim 2 is characterized in that: described packing ring (3-2) is a metal washer, and its center has the centre bore that equates with steam vent (3-1).

4, exhaust hydraulic prop according to claim 2 is characterized in that: the external diameter of described fixedly swivel nut (3-4) is connected with the bottom thread of stepped hole.

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