CN2607447Y - Single hydraulic prop - Google Patents

Abstract

The utility model provides a single hydraulic prop which is composed of a top cover, a movable prop, a prop sleeve, a cylinder prop, a handle body, a three-purpose valve, an oil cylinder, a base, a restoring spring, a sealing piece, a spring steel wire, etc., wherein the top cover, the movable prop, the prop sleeve, the cylinder prop, the handle body, the oil cylinder, the base and the three-purpose valve are surrounded into a variable cavity, a working media injected in the cavity directly acts on the top cover through the area of the cross section of an inner cavity of the movable prop, the cavity is enlarged so that the single hydraulic prop is lifted, and inversely, the single hydraulic prop drops under the action of the restoring spring; the three-purpose valve is installed on the handle body, and the height of the three-purpose valve is not changed along with the expansion and contraction of the single hydraulic prop. The utility model uses underground water as the working media so as to have low operating cost as well as avoid the underground water being polluted due to the use of emulsion. The utility model has the advantages of simple and feasible structure process, large stroke, long service life, light weight, high stability, high capability, low cost, low maintenance cost, convenient use, safety, environmental protection and reliability.

Description

A kind of hydraulic prop

One, technical field

The utility model relates to a kind of mining support apparatus, the two extension single hydraulic props of especially a kind of external poured.

Two, background technology

The channel of coal mining working surface support apparatus is one of mine imperative equipment.At present the support apparatus that uses in the colliery has wooden prop, elemental metals friction pillar, hydraulic prop and two extension single hydraulic props etc., because wooden prop is wasted a large amount of timber, and its lack perseverance increases resistance and fall distance, so seldom used; The elemental metals friction prop is little and inhomogeneous because of its setting load, and perseverance increases resistance and falls apart from also guaranteeing; Hydraulic prop is the new generation product of development after the elemental metals friction prop, applied more than two decades, hydraulic prop has two kinds of internal-injection type and external poureds, it as " mining machinery " published by Coal Industry Press 1993 with by the patent No. of China Mining University's application " hydraulic prop " patent of 97107063.6, this patent is outer pillar hydraulic prop, it carries out support just by the pressure liquid of the default emulsion station output 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.Two extension single hydraulic props of Germany are the two extension single hydraulic props of a kind of external poured that grow up on the hydraulic prop basis of external poured, as " the coal mine support handbook of publishing in 1993 by the Coal Industry Press, two extension single hydraulic props (the 957th page) of TS type wherein and DH type dual-active column (the 959th page) all are two extension single hydraulic props, and it also is the working cycles process with triple-use valve control pillar.Because present hydraulic prop is the valve seat of a triple-use valve of welding on the post of living all, and this valve seat is to be welded on the stressed post alive on (as the TS type) or the oil cylinder (as the DH type), influenced the intensity of post alive; Because its oil cylinder inner surface is the high pressure sealing face of hydraulic prop, its cost of production is higher again; And water quality is relatively poor under the coal mine, and the emulsion of being prepared is fair can not to be guaranteed, causes the oil cylinder serious corrosion, and pillar is scrapped.The learies of annual pillar reaches 300,000, causes great waste.The China's coal-mine One's name is legion, present commonplace use hydraulic prop, according to incompletely statistics, the requirement of hydraulic prop surpasses more than 1,000,000 every year, therefore, improvement and the new product of substantial development to monomer hydraulic pressure support apparatus has great importance.

Three, technology contents

1. goal of the invention

The purpose of this utility model is to overcome the weak point that above-mentioned prior art exists and design a kind of long, hydraulic prop of processing, long service life easily of shore supports intensity height, good stability, impulse stroke of guaranteeing; And its working media uses cheap mine water and without emulsion, thereby free from environmental pollution and water source.

2. technical scheme

Task of the present utility model is implemented as follows: a kind of hydraulic prop, and it comprises top cover, oil cylinder, back-moving spring and triple-use valve; It also comprises is equipped with the cylinder post and the post of living in the oil cylinder, the post upper top of living is equipped with top cover, oil cylinder bottom cylindrical is equipped with base, back-moving spring is contained in the post cavity alive, its upper and lower side is connected with the link of top cover and the spring link of base respectively, the upper end of oil cylinder is connected with the handgrip body, and cylinder post upper end is connected with column sleeve; Described post alive is a long tube, there is groove the upper end of its cylindrical, there is the shaft shoulder position, middle and lower part, there is round ring boss the bottom, be positioned on the circumference of boss top a plurality of radial direction through hole are arranged, post alive top is connected and fixed by O-ring seals, back-up ring and connection steel wire and top cover inner wall sealing, and the inwall of the round ring boss of its lower end outer wall and cylinder post forms slipper seal by dust ring, y-shaped sealing ring and back-up ring for being slidingly matched between the epimere inwall of its external surface and column sleeve; Column sleeve is that one section inwall is the short pipe of shoulder hole, on the downstairs hole ring-shaped groove is arranged all thereon; The cylinder post is a long tube, and its structure is identical with the post of living, and its upper end external surface is by O-ring seals, back-up ring and connect steel wire and column sleeve hypomere inner wall sealing is connected and fixed, between the inwall of its lower end annular boss cylindrical and oil cylinder for being slidingly matched; Described handgrip body is by one section short circular tube external wall and mutual vertical connection of the outer wall of one section less pipe, and handgrip of connection constitutes on the outer wall of little pipe, infall at short pipe and little pipe has one or several radial direction through hole, be communicated with two tube cavities and cylinder cavity, and connection triple-use valve, triple-use valve is contained in the little pipe of handgrip body, its short round tube inner wall is a shoulder hole, in last ladder and the downstairs hole ring-shaped groove is arranged all, its epimere inwall passes through dust ring, y-shaped sealing ring and back-up ring form slipper seal with the external surface of cylinder post and cooperate, its hypomere inwall passes through O-ring seals, back-up ring and connection steel wire and oil cylinder upper end external surface form and are sealedly connected and fixed, and the lower end external surface of oil cylinder passes through O-ring seals, back-up ring and connection steel wire and base are sealedly connected and fixed; So just formed by live post, top cover, column sleeve, cylinder post, oil cylinder, handgrip body, base and triple-use valve and surrounded a variable seal chamber that forms, when the change cavity volume, can realize the two flexible work of hydraulic prop.Described base is made up of base body and spring link, base body is to be that one section short pipe of disk and upper edge excircle thereof projection constitutes by a bottom, on its short round tube inner wall many ring-shaped grooves are arranged, a rectangular through-hole is arranged on uppermost annular ditch cell wall, the central fovea scarce space of scoring a goals in the end in the disk, the spring link is to comprise conical head rivet and packing ring, the conical head rivet afterbody has radially logical circular hole, rivet head is packed in the segment space on the disk, make the packing ring outer rim and the welding of disk inner plane that are sleeved on the rivet fixing, the postwelding rivet is rotatable.Described top cover is to be made of the claw that the square plate of hatch cover seat below connects a short pipe and respectively protrudes a truncated conical shape above it on four angles, spherical bearing is housed on it, pin, packing ring, seal weld is connected to mouth button bowl up below the square plate, and the outer lower bottom part of button bowl center is welded with a circular link.Described post alive, cylinder post, and oil cylinder also can use glass fiber reinforced plastic to make.

3. technique effect

The utility model has following advantage compared with the prior art: the triple-use valve of this pillar is mounted on the handgrip body, both guaranteed the intensity of post alive, also alleviated the weight of pillar, its not lifting thereupon when the post of living stretches, like this workman operate either convenient but also safety, or alleviated working strength of workers; Handgrip is located at the outside of the roundlet column jecket of the handgrip body that triple-use valve is housed, to guarantee that the workman does not damage triple-use valve in use; It need not to be welded to connect the hook of spring on the column wall of living, post is out of shape because of welding in process of manufacture in order to avoid influence is lived, thereby has guaranteed the machining accuracy of post alive, has also reduced cost of production; Its base is the outside that outsourcing is installed in the oil cylinder lower end, has so just avoided oil cylinder horn mouth to occur under the big situation of chamber pressure, causes the tight and drainage of sealing, even distortion is too big and lost efficacy; The working media that this pillar uses is cheap colliery mine water, has avoided the past because of using the phreatic pollution that emulsion caused, and has guaranteed that the quality of mining area Drinking Water and people's is healthy; After this pillar improved from structure, the column sleeve, cylinder post and the annex thereof that only increase same structure promptly became the hydraulic prop of multi-stage expansion, have so just increased its impulse stroke, and good stability.

Four, description of drawings

Fig. 1 is an outline drawing of the present utility model.

Fig. 2 is the sectional view of the utility model outline drawing.

Fig. 3 is the structure chart of the utility model embodiment 2.

Fig. 4 is the structure chart of the utility model embodiment 3.

Fig. 5 is the structure chart of the utility model embodiment 4.

Five, the specific embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail: as shown in Figures 1 and 2, it is by top cover 1, the post 2 of living, column sleeve 3, cylinder post 4, handgrip body 5, oil cylinder 6, back-moving spring 7, triple-use valve 27, base 8 and sealing ring, back-up ring, dust ring and be connected steel wire etc. and form.Wherein: top cover 1 is a composite member, it comprises that hatch cover seat is to connect one section short pipe by square plate 1-1 below to constitute, respectively protrude the claw of a truncated conical shape above it on four angles, upper central has individual segment connected in star, spherical bearing 1-2 is housed in the groove, all there are axially extending bore in segment connected in star and spherical bearing central authorities, pin 1-3 packs in the hole, then at pack into packing ring and welding of the afterbody of pin 1-3, make pin 1-3 can be in the hole movable, the following center seal weld of side's plate is connected to mouth button bowl 1-4 up, the centre of going to the bottom at the button bowl is welded with a link 1-5 who curves with reinforcing bar or steel wire, at short round tube inner wall a plurality of ring-shaped grooves are arranged, a rectangular through-hole is arranged on nethermost annular ditch cell wall,, link is welded on the top cover so that top cover is connected with the post 2 of living with connecting steel wire 11, avoid being welded in its inner wall deformation of formation on the live body, so also just prolonged its application life; The post 2 of living is pipes, its external wall of upper portion has ring-shaped groove, hypomere has the shaft shoulder and bottom that annular boss is arranged in its outer wall, a plurality of radially logical circular holes are arranged above the annular boss on the tube wall of its underpart, between the inner surface of the outer round surface of annular boss and cylinder post 4 for being slidingly matched, post 2 alive can be slided vertically relatively at cylinder post 4 inner chambers, and live post 2 and top cover 1 are by O-ring seals 9, back-up ring 10 and be connected steel wire 11 and be sealedly connected and fixed; Column sleeve 3 is that one section inwall is the short pipe of shoulder hole, hypomere shoulder hole inwall respectively has a plurality of ring-shaped grooves on it, epimere forms slipper seal by dust ring 12, y-shaped sealing ring 13 and back-up ring 14 with the external surface of the post 2 of living and cooperates, and hypomere is sealedly connected and fixed with cylinder post 4 upper end cylindricals by O-ring seals 15, back-up ring 16 and connection steel wire 17; Cylinder post 4 is identical with post 2 structures of living, between the annular boss cylindrical of cylinder post 4 lower ends and oil cylinder 6 inwalls for being slidingly matched, cylinder post 4 can be in oil cylinder 6 lower slider vertically; Handgrip body 5 is the outer walls and mutual vertical connection of the outer wall of one section little pipe by one section short pipe one side, and connect at the outer wall of little pipe that a handgrip constitutes, at short pipe and roundlet pipe infall one or more radially logical circular holes are arranged, two pipes and cylinder cavity are communicated, and communicate with triple-use valve, little round tube inner wall is a shoulder hole, for the usefulness that triple-use valve is installed, short round tube inner wall is a ladder hole, on its going up or down stairway hole wall a plurality of ring-shaped grooves are arranged respectively, its epimere is by dust ring 18, form slipper seal between y-shaped sealing ring 19 and back-up ring 20 and cylinder post 4 outer round surface and cooperates, its hypomere passes through O-ring seals 21, back-up ring 22 and connection steel wire 23 form with oil cylinder 6 upper ends and are sealedly connected and fixed; Oil cylinder 6 is long tubes, on its upper and lower side outer wall ring-shaped groove is arranged all, and its lower end is connected and fixed with base 8 inner wall sealings by connecting steel wire 24, O-ring seals 25 and back-up ring 26; Back-moving spring 7 is circular column draft springs of a two ends band hook, and its upper end hangs on the link 1-5 of top cover 1, and its lower end hangs on the spring link of base 8; Base 8 is made up of base body and spring link, base body be a bottom be disk above it along one section short pipe formation of excircle projection, a recessed segment shape space, centre, the end in the disk, the disk outer bottom is a circular arc, the short circular tube structure of square plate 1-1 connection is identical on the structure of its short pipe and the top cover, the spring link is that rounded washers and conical head rivet are formed, the rivet afterbody has a radially logical circular hole, also can hammer into shape flat the rivet afterbody and boring, rivet head is packed in the segment space at center, the end in the disk, make the packing ring outer rim and the disk interior baseplane welding that are sleeved on the rivet fixing, the postwelding rivet can rotate, and is convenient to rivet hole and is connected with back-moving spring 7 bottoms hook.Base makes the oil cylinder bottom can not form horn mouth with this improvement that is connected of oil cylinder and is out of shape, even scraps.By top cover 1, live post 2, column sleeve 3, cylinder post 4, handgrip body 5, oil cylinder 6, back-moving spring 7, base 8 and the triple-use valve 27 variable cavity space that surrounds, constitute two extension single hydraulic props like this.It is by triple-use valve fluid injection in pillar, liquid enters the annular housing of oil cylinder 6 and 4 formation of cylinder post by the through hole of handgrip body, and enter the annular housing that post 2 alive and cylinder body 4 form from the radial hole of cylinder post 4 lower ends, radial hole from post 2 lower ends of living enters cylinder intracavity alive again, along with the injection of liquid, when reaching certain pressure, live post 2 and top cover 1 rise like this, drive cylinder post 4 and upwards rise of column sleeve 3 when rising to certain altitude again, shore supports; When post falls in pillar, under action of reset spring, the radial direction through hole of liquid by live post 2 and cylinder post 4 lower ends drains in the annular housing of 6 of cylinder post 4 and oil cylinders, through hole from the handgrip body 5 releases liquid by the triple-use valve on it again, the every injection of liquid and releasing once, pillar just supports and falls post once, and pillar is just finished a working cycles like this; Two extension single hydraulic props that its forms have increased the impulse stroke of pillar, more are applicable to the needs than the high seam work plane.

As shown in Figures 3 and 4, on the basis of this pair extension single hydraulic prop, increase column sleeve 3-1 or 3-2, cylinder post 4-1 or 4-2 and annex thereof, can constitute three flexible or four flexible hydraulic props like this.Wherein column sleeve 3-1 or 3-2 and column sleeve 3, cylinder post 4 structures among cylinder post 4-1 or 4-2 and Fig. 2 are identical, handgrip body 5-1 or 5-2 are identical with handgrip body 5 structures, base 8-1 or 8-2 are identical with base 8 structures, its annex dust ring, y-shaped sealing ring, back-up ring, O-ring seals, back-up ring and connect dust ring 12, y-shaped sealing ring 13, back-up ring 14, O-ring seals 15, the back-up ring 16 among steel wire and Fig. 2 and be connected the structure of steel wire 17 corresponding one by one identical.In like manner: according to two extension single hydraulic props shown in Figure 2, can can form following rule: N=x+1 by the tricks that increases or reduce column sleeve and cylinder post and annex thereof, wherein N is telescopic hydraulic prop progression, x is the tricks (x=0 of column sleeve and cylinder post and annex thereof, 1,2,3,4 ... n).As shown in Figure 5, when the tricks x=0 of column sleeve 3 and cylinder post 4 and annex thereof, N=1, all the other structures are identical with the corresponding design of part of Fig. 2, so promptly constitute Single flexible single hydraulic prop, when x=1, N=2, thus be two extension single hydraulic props, as depicted in figs. 1 and 2; When x=2, N=3, thus be three extension single hydraulic props, as shown in Figure 3; When x=3, N=4, thus be four extension single hydraulic props, as shown in Figure 4.

Whole parts of this pillar are all through special nitrogen treatment, to increase its antiseptic property and abrasion resistance.Its working media is to adopt the down-hole water as medium, prevents to pollute not only cheapness but also environmental protection.

Post alive 2 of this pillar and cylinder post 4 and oil cylinder 6 also useable glass steel are made, and it had both alleviated the weight of pillar, have also improved the antiseptic property of pillar.

Claims (5)

1. hydraulic prop, it comprises top cover (1), oil cylinder (6), back-moving spring (7) and triple-use valve (27); It is characterized in that: it also comprises is equipped with cylinder post (4) and the post (2) of living in the oil cylinder (6), post (2) upper top of living is equipped with top cover (1), oil cylinder (6) bottom cylindrical is equipped with base (8), back-moving spring (7) is contained in post alive (2) cavity, its upper and lower side is connected with the link of top cover (1) and the spring link of base (8) respectively, the upper end of oil cylinder (6) is connected with handgrip body (5), and cylinder post (4) upper end is connected with column sleeve (3); Described post alive (2) is a long tube, there is groove the upper end of its cylindrical, there is the shaft shoulder position, middle and lower part, there is round ring boss the bottom, be positioned on the circumference of boss top a plurality of radial direction through hole are arranged, post (2) alive top is connected and fixed with top cover (1) inner wall sealing by O-ring seals (9), back-up ring (10) and connection steel wire (11), the inwall of the round ring boss of its lower end outer wall and cylinder post (4) forms slipper seal by dust ring (12), y-shaped sealing ring (13) and back-up ring (14) for being slidingly matched between the epimere inwall of its external surface and column sleeve (3); Column sleeve (3) is that one section inwall is the short pipe of shoulder hole, and ring-shaped groove is all arranged on the downstairs thereon; Cylinder post (4) is a long tube, its structure is identical with the post (2) of living, its upper end external surface is by O-ring seals (15), back-up ring (16) and connect steel wire (17) and column sleeve (3) hypomere inner wall sealing is connected and fixed, between the inwall of its lower end annular boss cylindrical and oil cylinder (6) for being slidingly matched; Described handgrip body (5) is by one section short circular tube external wall and mutual vertical connection of the outer wall of one section less pipe, and handgrip of connection constitutes on the outer wall of little pipe, at short pipe and roundlet pipe infall one or several radial direction through hole are arranged, be communicated with two tube cavities and oil cylinder (6) inner chamber, and connection triple-use valve (27), triple-use valve (27) is contained in the little pipe of handgrip body (5), its short round tube inner wall is a shoulder hole, in last ladder and the downstairs hole ring-shaped groove is arranged all, its epimere inwall is by dust ring (18), y-shaped sealing ring (19) and back-up ring (20) form slipper seal with the external surface of cylinder post (4) and cooperate, its hypomere inwall is by O-ring seals (21), back-up ring (22) and connection steel wire (23) form with oil cylinder (6) upper end external surface and are sealedly connected and fixed, and the lower end external surface of oil cylinder (6) is by O-ring seals (25), back-up ring (26) and connection steel wire (24) are sealedly connected and fixed with base (8); So just formed by live post, top cover, column sleeve, cylinder post, oil cylinder, handgrip body, base and triple-use valve and surrounded a variable seal chamber that forms, when the change cavity volume, can realize the two flexible work of hydraulic prop.

2. hydraulic prop according to claim 1, it is characterized in that: described base (8) is made up of base body and spring link, base body is to be that one section short pipe of disk and upper edge excircle thereof projection constitutes by a bottom, on its short round tube inner wall many ring-shaped grooves are arranged, a rectangular through-hole is arranged on uppermost annular ditch cell wall, the central fovea scarce space of scoring a goals in the end in the disk, the spring link is to comprise conical head rivet and packing ring, the conical head rivet afterbody has radially logical circular hole, rivet head is packed in the segment space on the disk, make the packing ring outer rim and the welding of disk inner plane that are sleeved on the rivet fixing, the postwelding rivet is rotatable.

3. hydraulic prop according to claim 1, it is characterized in that: described top cover (1) is to be made of the claw that the square plate (1-1) of hatch cover seat below connects a short pipe and respectively protrudes a truncated conical shape above it on four angles, spherical bearing is housed on it, pin, packing ring, seal weld is connected to mouth button bowl (1-4) up below the square plate, and the outer lower bottom part of button bowl center is welded with a circular link (1-5).

4. hydraulic prop according to claim 1 is characterized in that: anticorrosion and wear-resisting nitrogen treatment has all been carried out on the surface of described top cover (1), live post (2), column sleeve (3), cylinder post (4), handgrip body (5), oil cylinder (6) and base (8).

5. hydraulic prop according to claim 1 is characterized in that: described post alive (2), cylinder post (4), and oil cylinder (6) also can use glass fiber reinforced plastic to make.

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