102results about How to "Good support effect" patented technology

A flexible display device according to an embodiment of the invention comprises: a flexible screen, a shell and a bottom support part, wherein the shell comprises an accommodating part and a support seat; the bottom support part and the flexible screen are connected and overlapped; the bottom support part comprises a fixed support part and a rollable support part which are sequentially distributedalong the length direction of the flexible screen; and the flexible screen is in sliding fit with the support seat through the bottom support part. In the flexible display device according to the embodiment of the invention, the flexible screen can be glidingly arranged on the support seat through the bottom support part; the flexible screen and the rollable support part can synchronously stretchout of or retract in the accommodating part; the fixed support part always bears the flexible screen below partial flexible screen; and on the premise of making the flexible screen telescopic, the flatness of the flexible screen is improved, the damage of the flexible screen is reduced, and the display effect of the display screen is optimized.

The invention discloses a supporting method for soft broken nonuniform stratum tunnel construction. The supporting method includes the steps that firstly, an arch support is erected in a bottom layer tunnel through steel pipes, and the portion, on the top of the arch support, of the bottom layer tunnel is drilled; secondly, a small pipe roof is constructed on the drilled portion of the arch crown of the arch support; thirdly, during construction of the small pipe roof for supporting, advanced reinforcement treatment is conducted on a top arch of the tunnel through advanced small pipes in a floor staggered mode; fourthly, the tunnel is excavated; fifthly, after the tunnel is excavated, preliminary supporting construction is conducted in time each cycle; sixthly, after excavation and supporting of a tunnel trunk of the tunnel, an inverted arch is constructed and sealed into a loop; and then secondary lining following operation is conducted. The method has the advantages that deformation of tunnel surrounding rocks can be effectively reduced, self-stabilization and seepage prevention capacity of the tunnel is permanently improved, a multifunctional surrounding rock reinforcement region is formed, and safety of tunnel constructors and equipment is guaranteed.

The invention relates to a supporting method of a roadway in a coal mime, particularly to a supporting method of a permeable soft broken rock stratum roadway. The supporting method aims at solving the problems that soft broken rock stratum roadways especially permeable soft broken rock stratum roadways are poor in supporting effect, high in cost and the like. The supporting method comprises the steps of first concrete spraying; combined support through high strength deformed steel bar anchor rods and diamond metal nets; anchor cable installation; secondary concrete spraying; installation of chemical pulp grouting anchor rods; installation of cement slurry grouting anchor rods.

The invention provides a trinity coupling support stability control method for a gob-side entry-driving coal pillar, which is particularly suitable for a large-deformation gob-side roadway with an unstable overlying rock. A pre-stress threaded steel anchor rod is used on the gob-side entry-driving coal pillar on an upper zone roadway coal pillar side to tension a coal pillar goaf-side coal body; a short anchor rod on a lower zone gob-side entry-driving coal pillar side is used for controlling the integrity of a whole displacement region of a coal pillar roadway side; and meanwhile, a long grouting anchor cable is matched to reinforce an anchoring point so as to limit the development of an inner separation layer in the whole displacement region. A range of generating a crushed region of the coal pillar under the effect of lateral supporting pressure can be relieved under the expression of a haling effect of the pre-stress threaded steel anchor rod, so as to prevent an instability state of the coal pillar from worsening; and 'controlling by the short rod and grouting by the long rod' of the short anchor rod and the long grouting anchor cable are given into fully play so as to prevent a coal pillar support structure from losing effect and re-achieve the supporting capability of a remained anchoring structure in the coal pillar, so that coupling support with alternative anchor net support and anchor grouting support is formed between the gob-side entry-driving coal pillar side and a goaf side.

The invention discloses a steel coil uncoiling production line, and belongs to the technical field of unfolding equipment. The steel coil uncoiling production line comprises a pay-off device rotationally installed on a supporting frame. A traction roller pair is arranged on the downstream side of the pay-off device. A transition roller is arranged between the traction roller pair and the pay-off device. The pay-off device comprises a transmission shaft rotationally installed on the supporting frame. A plurality of distraction roller sheets are arranged on the periphery of the transmission shaft in an annular array mode. Each distraction roller sheet is arc-shaped. A first distraction air cylinder and a second distraction air cylinder are arranged between each distraction roller sheet and the transmission shaft. Cylinder bodies of the first distraction air cylinders and the second distraction air cylinders are installed on the transmission shaft in a hinged mode. A distraction gap exists between every two adjacent distraction roller sheets. The steel coil uncoiling production line is good in uncoiling effect, the residual internal stress of a steel strap can be further effectively eliminated after uncoiling, and the steel coil uncoiling production line is compact in structure, is good in use performance and has good application potential and popularization value.

The invention discloses a shock-absorbing seat with a multi-stage automatic reset function, comprising a transverse shock-absorbing spring, a support frame, a longitudinal shock-absorbing spring and a shock-absorbing mechanism, and the support frame is sequentially welded with a first bearing plate from bottom to top , the second bearing plate, the third bearing plate and the fixed plate, the support frame above the fixed plate is provided with an assembly plate, the bottom of the assembly plate is welded with a support plate, and the bottom end of the support plate is welded with a vertical support shaft, so The support shaft is welded with three shock-absorbing pressure plates from top to bottom; both sides of the bottom of the shock-absorbing pressure plate are connected to the diagonal strut through the pin shaft, and the bottom end of the diagonal strut is connected to the shock-absorbing mechanism through the pin shaft; the structure is stable and the supporting effect Good, it effectively slows down the impact or impact of the equipment, the buffering effect is obvious, and after the impact is over, the horizontal shock absorbing spring and the longitudinal shock absorbing spring return to drive the support shaft to move upward to the initial state, without affecting the support and shock absorbing effect on the assembly plate .

The invention discloses a vented anchoring and grouting device for a common anchor rod and a using method thereof. The vented anchoring and grouting device includes an anchor rod, fastening nuts, a sealing washer, a venting grouting composite end socket, a tray, a venting grouting integrated pipe, an inflatable elastic grouting-stop plug, a guide protection cover, a sealing dustproof film, and ananchoring agent. According to the vented anchoring and grouting device for the common anchor rod, a venting passage and a grouting passage are separately arranged, and the venting grouting composite end socket is fixed in a borehole through the inflatable elastic grouting-stop plug; and according to the vented anchoring and grouting device for the common anchor rod and the using method thereof, inthe process of mounting the common anchor rod, by adding the device, a mounting hole can be directly used as a grouting hole for grouting without affecting normal pre-tightening force reinforcement of the common anchor rod, while a rock mass is reinforced, a common end socket anchoring anchor rod is changed to full length anchoring, the vented anchoring and grouting device solves the problems ofventing and plugging in the processes of anchoring and grouting support and grouting, the grouting effect is improved, and construction workload and the support cost of anchoring and grouting are reduced.

The invention discloses a supporting and protecting device of a large obliquity thick coal bed leaving small coal pole along the roadway driving, which comprises an outrigger, a triangle fixing bracket, a supporting leg brace and a fixing anchor. The outrigger is I-shaped, and a triangle fixing bracket is welded on the top and the bottom ends of the outrigger. The fixing anchors of the top and the bottom ends of the outrigger pass the anchor hole on the triangle fixing bracket. One section of anchor enters the roadway top and the stable terrane of the soleplate, and the other end is hung with a splint which fixes the top and the bottom ends of the outrigger on the roadway coal wall to form a strong supporting and protecting whole together with the metal net, the high-strength pre-stress anchor and the metal band. The materials of the device can be easily gained, the construction is easy, and the supporting and protecting are safe and reliable, thus effectively improving the reliability and safety of the whole support and protection, solving the roadway supporting and protecting technological problem of large obliquity thick coal bed, producing good effect that prevents the coal bed from sliding, and providing high practical value.

The invention relates to a foundation ditch composite concrete nail supporting structure and method. The method comprises the steps that concrete nails or anchoring rods are arranged, and a surface layer reinforcing mesh is laid; concrete is injected till the concrete covers the surface layer reinforcing mesh; a lower nail bearing structure is installed; micro-prestress is exerted on the concrete nails, and the concrete nails are locked through nuts; concrete is sprayed to form a block concrete surface layer, and a concrete nail supporting layer is formed; a lower anchor bearing structure is installed; low prestress is exerted on the anchoring rods, and the anchoring rods are locked through anchoring tackles; concrete is injected to form a block concrete surface layer, and an anchoring rod supporting layer is formed; the concrete nail supporting or the anchoring rod supporting is repeated till the supporting reaches the bottom of a foundation ditch, the concrete nail supporting layers and the anchoring rod supporting layers are formed, and the supporting structure is formed. The defects that prestress cannot be exerted on the concrete nails and the nail heads are prone to generating piercing damage to the surface layers are overcome through the lower nail bearing structure of the nail heads of the concrete nails; the problems of steel channel buckling damage and the anchoring head punching failure are solved through the lower anchor bearing structure of the anchoring heads; the defects that work of the concrete nails and work of the anchoring rods are inconsistent in the traditional joint supporting of the concrete nails and the anchoring rods is solved by exerting the micro-prestress on the concrete nails and exerting the low prestress on the anchoring rods.

The invention relates to the field of life supplies of people, and in particular relates to a prestressed mattress and a design method thereof. The prestressed mattress comprises an elastic layer and a prestressed component which is used for pre-compressing the elastic layer so as to enable the elastic layer to obtain a prestressing force. When the intensity of pressure of a human body to the prestressed mattress is less than f0, the prestressed mattress is not deformed; when the intensity of pressure of the human body to the prestressed mattress is more than f0, the prestressed mattress is deformed, and the part of the intensity of pressure which is more than f0 has linear relation with a rigidity coefficient Kb; therefore, the designed prestressed mattress has double parameters, so that the types of mattresses can be enriched, the performances of the mattress are diversified, and the prestressed mattress can well meet various different demands of people.

The invention relates to a device for simulating forces of different regions of an arched tunnel, which comprises a simulated tunnel three-dimensional structure of a tunnel, wherein the simulated tunnel three-dimensional structure of the tunnel consists of hollow uncovered arch tunnel sections and hollow uncovered straight tunnel sections connected to two ends of the arched tunnel sections; the arched tunnel sections are communicated with the hollow uncovered tunnel sections; a first pressure relief port is formed at the highest position of one side wall of the arched tunnel section; a secondpressure relief port is formed in the side wall between the first pressure relief port and one hollow uncoveredstraight tunnel section, and fluid filling materials are filled in the simulated tunnel three-dimensional structure. The device and the method for simulating forces in different areas of the arched tunnel can solve the problem that force characteristics and related rules of a fluid filling lining supporting structure of the arched tunnel cannot be truly measured, can truly simulate force conditions in different areas of the fluid filling lining supporting structure of the arched tunnel, can timely feedback the force conditions of the tunnel in real time, and can be applied to research on the tunnel under various different conditions.

The invention provides a left ventricular isolation system, a left ventricular isolation device and a conveying device thereof. The left ventricular isolation device comprises a main body stent; the conveying device comprises a push mechanism and a recovery mechanism; the main body stent comprises a stent main body and first and second connecting parts; the stent main body comprises a first proximal end and a first distal end; the first connecting part is arranged at the first distal end; the plurality of second connecting parts are arranged at the first proximal end; the push mechanism comprises a third connecting part which is matched with the first connecting part, so that detachable connection between the push mechanism and the main body stent is achieved; the recovery mechanism is provided with fourth connecting parts which are matched with the second connecting parts, so that detachable connection between the recovery mechanism and the main body stent is achieved; and via the push mechanism and the recovery mechanism, the stent main body is driven to expand towards outer side or fold towards inner side, so that a function of repeatedly locating the left ventricular isolationdevice is achieved, and the accuracy of a release position of the left ventricular isolation device is guaranteed.

The invention relates to a rope guiding device of a winch. The roper guiding device comprises a left support, a right support, a reciprocating lead screw, a reciprocating sliding seat, rope clamping rollers, a guiding shaft and a sliding sleeve, wherein the reciprocating lead screw and the guiding shaft are arranged between the left support and the right support in parallel, the reciprocating sliding seat is sleeved on the reciprocating lead screw, the guiding shaft is provided with the sliding sleeve, and a pair of the rope clamping rollers are connected between the sliding sleeve and the reciprocating sliding seat. The rope guiding device is characterized in that two groups of sliding sleeve rollers for clamping the guiding shaft are arranged on the sliding sleeve. According to the rope guiding device of the winch, the sliding sleeve is provided with the sliding sleeve rollers such that the movement of the sliding sleeve on the guiding shaft is in a matched rolling manner, thus the friction is reduced, the supporting effect is good, and a situation of dead locking is avoided when the rope guiding device is used for a long time.

The invention discloses a bifurcation-adjacent part lesion applicable stent. The bifurcation-adjacent part lesion applicable stent is a tubular stent composed of a plurality of wavy support units axially connected into a whole; the tubular stent comprises a near end support mechanism, a middle support mechanism and a far end support mechanism which are sequentially connected; at least the part outside the near end support mechanism outside the tubular stent extends gradually out of the tubular stent from the far end to the near end. The bifurcation-adjacent part lesion applicable stent can beapplied to interventional treatment on vessel stenosis and occlusion lesion parts close to vessel bifurcations to solve the problem that existing intravascular stents cannot fully cover lesions and beattached to vessels after being implanted into branch vessels.

The invention discloses a reinforced supporting device for a roadway, and belongs to the field of roadway supporting. The reinforced supporting device comprises the roadway and a base, wherein the base is located in the roadway; a reversed loader is installed in the middle of the upper surface of the base; through holes are symmetrically formed in the base; base fixing equipment is movably arranged in the through holes; sleeves are symmetrically welded to the upper surface of the base; hydraulic cylinders are symmetrically installed on the side walls, away from each other, of the two sleeves;the same vertically-arranged supporting side plate is fixed to one of the ends of piston rods of the two hydraulic cylinders; screws are rotationally installed in the sleeves; first bevel gears are installed on the screws; and first motors are installed on one side walls of the sleeves. The reinforced supporting device is novel in design, firm in structure, capable of stably supporting the top andthe two sides of the roadway, high in safety, capable of adapting to the changeable roadway environment and convenient to use; the base can drive a supporting column structure to move, manual disassembling, assembling and carrying are not needed, the labor intensity is reduced, and the reinforced supporting device is worthy of popularization.

The invention discloses an environment-friendly multifunctional waste disposal device which comprises a crushing box. A feeding opening is formed in the upper surface of the crushing box, and the leftside and the right side of the front face of the inner wall of the crushing box are fixedly connected with auxiliary devices. The back faces of the two auxiliary devices are fixedly connected with afirst crushing roller and a second crushing roller correspondingly, and one end of the back face of the first crushing roller is fixedly connected with a second rotating shaft. According to the environment-friendly multifunctional waste disposable device, a motor and a compression device are arranged, an output shaft of the motor rotates forwardly to drive a driving gear to rotate forwardly, the driving gear drives a driven gear to rotate reversely, the driving gear drives the second rotating shaft to rotate forwardly, and the driven gear drives a third rotating shaft to rotate reversely, so that the first crushing roller is driven to rotate forwardly, and the second crushing roller is driven to rotate reversely. Waste can be crushed and compressed sequentially, people do not need to crushthe waste first and then move the waste to a compression position to be compressed, the time and labor of people are saved, and people can dispose the waste conveniently.

The invention discloses a plywood support structure for adjacent ore removal tunnels and a construction process thereof, and relates to the technical field of natural caving mine supporting. The plywood support structure comprises anchor holes, mortar anchors, horizontal anchor cables, top anchor cables, concrete shields and support plates, wherein the anchor holes are formed in surrounding rockson the tops of the ore removal tunnels; the mortar anchors are inserted into the anchor holes; gaps between the mortar anchors and the anchor holes are filled with mortar; the concrete shield structures are concrete coatings on the inner walls of the ore removal tunnels; the support plates are steel plates which are closely fixed to the concrete shield structures; a plurality of anchor cable holesare formed in parallel in the surrounding rocks between adjacent two ore removal tunnels; the horizontal anchor cables are arranged in the anchor cable holes; the mortar is filled into the position between the horizontal anchor cables and the anchor cable holes; the two ends of the horizontal anchor cables are fixedly connected with the support plates on the two sides of the surrounding rocks; and the tops of the ore removal tunnels are also provided with top anchor cables. Through the adoption of the plywood support structure, the stability of the ore removal tunnels is improved effectively,and the maintenance cost in the production of the ore removal tunnels is lowered.

The invention belongs to the technical field of coal mine down-hole shotcrete, and relates to a C20 coal mine down-hole roadway protection concrete prepared from fly ash aggregates, and a preparation method thereof. The C20 coal mine down-hole roadway protection concrete prepared from fly ash aggregates is composed of cement, sands, fly ash aggregates, water and a setting accelerator according to a weight ratio of 1:(1.80-2.53):(0.90-1.34):(0.40-0.44):0.05, the density of the concrete is 1800-2200kg / m<3>, and the 28d strength is 29-32MPa. The preparation method of the concrete comprises the following steps: weighing above raw materials according to the weight ratio, immersing the fly ash aggregates in water for at least 1h, drying the surface of the fly ash aggregates in the shade, mixing cement, the sands and the dried aggregates, uniformly stirring, adding water and the setting accelerator, continuously stirring until uniformity, and discharging. The aggregates are used to substitute sands in common concrete, so destroys of quarrying to environment are reduced, wastes are changed into valuables, waste utilization is realized, and the concrete has good environment benefit and economic benefit.

The invention discloses a petroleum pipe bracket device. The petroleum pipe bracket device comprises a base; support columns are respectively arranged at four corners of the top of the base; buffer columns are arranged at the tops of the support columns; a support base is arranged above the base; four corners of the bottom of the support base are respectively fixed at the tops of the buffer columns; support blocks are respectively arranged on two sides of the top of the support base; clamping through holes are respectively formed in one adjacent sides of the two support blocks; clamping rods are slidingly mounted in the clamping through holes; tooth blocks are arranged on the clamping rods; clamping blocks are respectively arranged at one adjacent ends of the clamping rods; clamping grooves are respectively formed in one adjacent sides of the clamping blocks, and are matched with petroleum pipes; motors are arranged on one sides of the support blocks; and the motors are positioned at the top of the support base. The petroleum pipe bracket device can be adjusted according to the diameter lengths of petroleum pipes for fixedly clamping the petroleum pipes with different diameter lengths, can buffer the vibration to achieve an excellent support effect, and is simple in structure, convenient for use and low in cost.

The invention discloses a support replacement system for base plates of a foundation pit of a mucky soil layer in deep foundation pit support construction. The support replacement system comprises a support replacement slab band and a force transfer device, wherein the support replacement slab band is arranged between a foundation pit support structure and a brick mould, and the force transfer device is arranged in a late poured band; the support replacement slab band comprises a constructional anti-crack reinforcement bottom bar, I-steel and a constructional anti-crack reinforcement surface bar; the I-steel is located between the outer side of the brick mould and a fender post; the force transfer device comprises first I-steel and second I-steel; the outer end of the first I-steel and the outer end of the second I-steel are respectively buried in base plates of two sides; the first I-steel and the second I-steel are connected through bolts. According to the support replacement system disclosed by the invention, by combining with the stiffness characteristic of the foundation pit support structure, the I-steel is adopted by the support replacement slab band to perform targeted local reinforcement at the position of the fender post; a support replacement slab band of which the stiffness is high and low by matching with the foundation pit support structure; by arranging the force transfer in the late poured band, the base plates can be effectively connected into a whole to form a horizontal support structure for the base plates.

The invention discloses a fully-mechanized excavation face superhard rock positive fault blasting method which comprises the following steps: S1, according to a result of numerical simulation calculation, intercepting effective stress nephograms of a numerical model at different moments for contrastive analysis; s2, constructing a coal rock model to carry out a blasting similar simulation experiment; s3, calculating a tectonic zone control range according to the normal fault fall; s4, energy-gathered blasting holes and control holes are formed in the fault working face according to blasting specifications; s5, the energy gathering direction of energy gathering blasting is arranged; s6, the blasting holes are filled with energy-gathered cartridges, and directional blasting is achieved; s7, forward charging is adopted as the charging mode; and S8, blasting and weakening the hard rock to finish tunneling of the roadheader. According to the method, the super-hard rock normal fault can be safely and rapidly blasted, the hard rock is fractured in a preferable shaped charge blasting mode in a normal fault structure area, the rock body weakening and roadway supporting effects are good, the problem that dynamic disasters such as surrounding rock instability are induced by common blasting disturbance is effectively solved, and roadway tunneling is safely and efficiently carried out.

The invention relates to a construction method for adopting a prestressed component anchor rod to support crumbly strata of a mine. The construction method comprises the following steps drilling a support hole in the crumbly strata of the mine; after drilling is finished, clearing residual rocks in the support hole; uniformly stirring a resin anchoring agent arranged on an anchor head of the prestressed component anchor rod, and inserting the anchor rod is into the support hole, so that the upper end of the prestressed component anchor rod is fixed; pulling down the prestressed component anchor rod, so that an upper supporting device is unfolded and completes self-locking, and a lower spirally lifting supporting device is unfolded; mounting a tray for abutting against a rock wall outside the support hole at the lower part of the prestressed component anchor rod; performing grouting in the support hole through a primary grouting pipe which is arranged on the prestressed component anchorrod and an outlet of which leads to the upper part of the prestressed component anchor rod; and performing secondary grouting through a secondary grouting pipe arranged on the prestressed component anchor rod. The construction method is helpful to solve the problem of construction safety such as rib spalling and roof falling occurring at a broken part of surrounding rock in the process of tunneling in chamber and tunnel stratum.

The invention relates to a multipurpose fishing umbrella, comprising a middle rod, an umbrella surface and umbrella ribs, wherein a flow guide pipe is arranged inside the middle rod; the upper end of the middle rod is internally provided with a cavity communicating with the flow guide pipe; the side wall of the upper end of the middle rod is provided with a plurality of openings which communicate with the cavity; and the lower end of the middle rod is provided with a first screw hole. The multipurpose fishing umbrella also comprises a support rod, a connecting head and an annular chassis, wherein a first screw rod matched with the first screw hole is arranged at the upper end of the support rod; a water pump is arranged on the side wall of the support rod; the water pump is connected with a water outlet pipe and a water inlet pipe; the connecting head is used for connecting the water outlet pipe with the flow guide pipe; an external thread is arranged on the outer surface of the lower end of the support rod; the annular chassis is matched with the external thread; the side wall of an inner hole of the chassis is provided with an internal thread matched with the external thread; a plurality of concave cavities are arranged in the edge of the chassis; and a plurality of legs which are hinged to the chassis are arranged in the concave cavities. The multipurpose fishing umbrella has cooling and ultraviolet light absorbing effects; the legs are used for support, so that the legs are pressed by other heavy objects to conveniently realize fixation on hard ground; and the applicability is high.

The invention provides a supporter exchanging method for a stage construction basement using cast-in-situ bored piles as a separation palisade. The method comprises the following steps: step 1) constructing a separation palisade structure using the cast-in-situ bored piles as a main body, inserting supporter exchanging profile steels between the adjacent cast-in-situ bored piles, and embedding one end of each of the supporter exchanging profile steels into a basement floor and a transmission belt of a first-stage basement; step 2) embedding the other end of the supporter exchanging profile steels into the basement floor of a second-stage basement when casting the basement floor of the second-stage basement; and step 3) disassembling the cast-in-situ bored piles and the transmission belt, keeping the supporter exchanging profile steels, strapping connection steel bars and casting concrete, so as to connect the first-stage basement with the second-stage basement. The supporter exchanging problem of the early-stage and later-stage construction parts is solved well, and the supporter exchanging effect is good; in addition, the basement structure is constructed in sequence, the construction is convenient, and the supporter exchanging cost is low.

The invention belongs to the technical field of metal mine mining, discloses a roadway supporting method for passing through a weak phyllite thrust fault, and solves the problems that a weak phyllitethrust fault area of a metal mine has the characteristics of soft lithology, easiness in weathering, prominent softening and slimming phenomena when meeting water, and has obvious swelling and shrinking property, rheological property, disturbance and the like, and the problems in supporting in the prior art. According to the roadway supporting method for passing through the weak phyllite thrust fault, a steel arch and concrete combined supporting mode is adopted, respective advantages of forepoling, bolt-mesh-spurting supporting, steel arch supporting and concrete supporting are integrated, ayielding principle is combined, and weak surrounding rock is remained for deforming to reach the second equilibrium time of ground stress; the roadway supporting method has a good in-situ supporting effect; the roadway construction quality is ensured, and meanwhile, the secondary supporting probability is greatly reduced; the service life of a roadway is greatly prolonged; the cost is reduced; andtechnical guarantee is provided for safety production of the mine.

The invention belongs to the technical field of hydraulic equipment, and particularly discloses a hydraulic device. The hydraulic device comprises a base and a first sleeve. A big piston rod is arranged on the base. A big piston is arranged on the big piston rod. A second sleeve and a third sleeve are separately arranged on the two sides of the first sleeve. A hemispherical support which is rotatably connected with the first sleeve in a sealing mode is arranged at the upper end of the first sleeve. Sealing plates with sliding holes are arranged at the upper ends of the two sleeves correspondingly. A supporting plate is arranged on the support. The second sleeve and the third sleeve are each internally provided with a small piston and a small piston rod. An upper pipeline, a lower pipelineand a tee joint are arranged on each of the first sleeve and the second sleeve. Valves are arranged on the tee joints. Supporting rods are connected between the valves and the supporting plate. The first sleeve is connected with an oil pump through an oil inlet pipe. The hydraulic device is mainly used for supporting a weight, and the problem that the service life of a hydraulic supporting deviceis shortened due to unbalanced stress is solved.