82results 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 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 relates to an automobile carrying device, in particular to an omnidirectional automobile carrying device, which solves the problem that a tyre clamping carrying device of a three-dimensional garage can carry automobiles only along one direction. The automobile carrying device comprises a frame, clamping arms, a traveling mechanism and an intelligent controller, wherein the clamping arms, the traveling mechanism and the intelligent controller are arranged on the frame. The automobile carrying device is characterized in that the traveling mechanism comprises drive wheels capable which can adjust a traveling direction, and a plurality of universal driven wheels; a pedestal is fixed on the frame; the pedestal is provided with steering frames rotating relative to the pedestal; the drive wheels are fixed on the steering frames; and axes of the drive wheels are vertical to and intersect with rotating axes of the steering frames. In the invention, the omnidirectional movement of the whole carrying device is realized, and the direction of the carrying device can be changed at any angle; and telescopic connecting rods are arranged between a front frame and a rear frame so as to adjust the length of the carrying device according to differences in wheel bases of front and rear wheels of the automobiles.

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 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 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 discloses a rapid-releasing sleeving tool allowing a screwdriver bit to be installed and uninstalled. The rapid-releasing sleeving tool comprises a rod body, a linkage device and a buckling device. The rod body comprises a groove hole provided with an end opening, a buckling hole penetrating outwards from the groove hole and a long trough hole far away from the end opening. The linkage device comprises a guide pin arranged in the long trough hole in a penetrating mode and a first elastic member which can abut against the guide pin and is close to the end opening. The buckling device comprises a bundling ring arranged outside the rod body in a sleeving mode and provided with an inner ring groove, a second elastic member capable of making the bundling ring abut against the guide pin and a positioning ball contained in the buckling hole. The buckling device can move between a buckling position and a releasing position. When the buckling device is in the buckling position, the screwdriver bit is buckled by the positioning ball to be fixed in the groove hole. When the buckling device is in the releasing position, the screwdriver bit can slide axially along the rod body to be released. According to the structure, the rapid-releasing sleeving tool can slide smoothly and a good positioning property is achieved.

The invention discloses a foundation pit supporting structure. The structure comprises a plurality of row piles which are uniformly arranged at intervals around the periphery of a foundation pit, andthe tops of the row piles are provided with sloping reinforcing regions; the sloping reinforcing regions comprise horizontal connecting sections, inclined pressing slope sections and slope top hardening sections, and the included angles between the inclined pressing slope sections and the horizontal plane are 40-45 degrees; and vertically arranged reinforcing piles located inside soil bodies are arranged below the inclined pressing slope sections, and the reinforcing piles are uniformly arranged at intervals around the periphery of the foundation pit and are all parallel to the row piles. According to the structure, the row piles and the sloping reinforcing regions are arranged, so that slopes of the foundation pit are well supported; meanwhile, the reinforcing piles are arranged to reinforce the soil bodies, so that the overall stability of the soil bodies in the sloping regions is improved; the sloping reinforcing regions are reasonably divided into three sections so that the side pressure of the soil bodies in the sloping regions to the row piles can be relieved; and the sloping reinforcing regions and the tops of the row piles are connected into wholes to form mutual supportingsystems, so that the overall stability is higher.

The invention discloses an oil drum lifting device and a forklift, and relates to the technical field of oil drum carrying, the oil drum lifting device comprises a base, an oil drum clamping device used for clamping the upper edge of an oil drum and a supporting structure used for supporting the oil drum are arranged on the base, the supporting structure comprises a movable rod, and the movable rod is arranged on the base in a sliding mode; two movable arms are arranged on the movable rod in a relative sliding mode, one movable arm is rotationally connected with a first rotating roller and a second rotating roller, a strip is connected to the first rotating roller in a winding mode, and after the strip movably bypasses the second rotating roller, one end of the strip is fixedly connected to the end of the other movable arm. The strip between the two movable arms forms a semi-circle shape to support the side wall of the lower portion of the oil drum. According to the oil drum lifting device, the supporting structure of the oil drum lifting device can carry out surface contact supporting on oil drums with various radiuses, the supporting effect is good, and the side walls of the oil drums are not prone to deformation.

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.

The invention discloses a polypropylene film. The polypropylene film comprises a surface layer, a bottom layer, a middle layer, an electroconductive layer and a supporting layer; the middle layer, theelectroconductive layer and the supporting layer are arranged between the surface layer and the bottom layer; the middle layer, the electroconductive layer and the supporting layer are compounded; the surface layer and the bottom layer are anti-electrostatic layers; the components of the surface layer and the bottom layer comprise polypropylene and an anti-electrostatic agent; the middle layer isformed by filling a plurality of supporting cavities and polyurethane; the electroconductive layer comprises a round convex block and an electric conductor which is arranged on the round convex blockat intervals; the convex block is in run-through connection with the middle layer and the supporting layer. The polypropylene film provided by the invention is simple in structure and adopts a multi-layer composite structure, the multi-layer composite structure is arranged between the surface layer and the bottom layer, the film structure has a good supporting effect, and the electroconductive layer is arranged, therefore, the whole film has electroconductivity and prevents static electricity.

The invention provides a steel bar truss floor deck for a prefabricated building. The steel bar truss floor deck for the prefabricated building comprises a first base frame. One side of the first baseframe is movably connected with one side of the second base frame through a connecting pin. One side of the first base frame and one side of the second base frame are both fixedly provided with supporting frames. One side of each supporting frame is fixedly provided with a fixing mechanism. The tops of the first base frame and the second base frame are fixedly provided with several frame mechanisms. Electro-hydraulic rods are fixedly installed between rod arms of the two support frames. By means of arranged motors, two cross plates are conveniently driven to rotate, and then the angles of theL-shaped plates on fixing rods are adjusted, and each support seat at one end of the corresponding L-shaped plate is made to fix and support the steel bar truss floor deck. In this way, the steel bartruss floor deck for the prefabricated building has an excellent supporting effect and large load bearing capacity, it is not needed to adopt a steel beam of a large section height to support the steel bar truss, so that the clear height of a floor is increased, and the utilization rate of a building space is improved.

The invention provides a method of constructing underground parking lot in a pipe-jacking tunnel. The method comprises the steps that C-shaped reinforced concrete members are prefabricated; reinforcedconcrete slab upper boards and lower boards are prefabricated; dangling sides of the prefabricated C-shaped reinforced concrete members are closed by supporting closed members to form frame-shaped jacking pipes I; both ends of the reinforced concrete slab upper boards and lower boards are closed to form frame-shaped jacking pipes II; a working well is arranged; firstly, the frame-shaped jacking pipes I are jacked in a penetrating mode; then, the frame-shaped jacking pipes II are jacked in sequence according to the design, the frame-shaped jacking pipes II of first column of vertical columns are completed; supporting closed members of vertical column parts are dismantled, and the vertical columns are held; the first column of the vertical columns and the top layer of the supporting closedmembers between the C-shaped reinforced concrete members are dismantled, and the upper boards are supported by embedded strutting pieces; vertical-and-horizontal transverse beams are made at seams between upper boards of the C-shaped reinforced concrete members and the reinforced concrete upper boards; and other supporting closed members are dismantled, and the parking space of a first part is achieved.

The invention belongs to the technical field of LED vertical lighting system production, and particularly relates to an intelligent LED vertical lighting system which comprises an LED lamp body and abase. The LED lamp body is fixedly connected with one end of the second lamp pole, the other end of the second lamp pole is movably hinged to the top end of the first lamp pole, and the bottom end ofthe first lamp pole is located in an electrified storage cavity in the third lamp pole. The bottom end of the third lamp pole is fixedly connected with the upper surface of the base; a plurality of fixed legs are movably hinged to the bottom of the base; by arranging the spherical air bag, when air in the spring compression pipe enters the connecting hose through the first airflow channel, air inthe air distribution cavity can enter the spherical air bag through the connecting hose to enable the spherical air bag to expand, and at the moment, the fixed legs can rotate in the direction away from the center axis of the base; the bottom ends of the fixed legs incline towards the outer side of the base, so that the supporting effect on the base is better, and the system is prevented from toppling over when the rotating roller makes contact with the ground.

The invention belongs to the technical field of cavern support, and particularly discloses a controllable roof supporting system for dangerous rock masses in a cavern and a using method thereof. The controllable roof supporting system for the dangerous rock masses in the cavern includes a main supporting system and an auxiliary supporting system, wherein the lower end of the main supporting systemis placed on the ground in the cavern, the top of the main supporting system is driven to controllably support the dangerous rock masses in the cavern by adjusting a controllable jacking component arranged in the middle, the lower end of the auxiliary supporting system is connected to the main supporting system, the top of the auxiliary supporting system is controlled by an auxiliary jacking screw to support the dangerous rock masses in the cavern, and thus the dangerous rock masses at the top in the cavern can be supported point by point to form a network point-like support. The whole support system can be assembled and disassembled in a modularized mode, the assembly is convenient, supporting is effective, construction has little influence on the cavern, the controllable jacking component is adopted to cooperate with the auxiliary jacking screw for controllable contact support of each contacted dangerous rock mass, the whole support process is controllable, the support effect is remarkable, and the cost is relatively low.

The invention discloses a roadway support structure. The roadway support structure comprises a driving support part for conducting primary support on a roadway and a driven support part for conducting secondary support on the roadway. The driven support part supports the driving support part and comprises a plurality of steel pipes, and each pipe is filled with concrete. The roadway support structure is good in support effect, high in safety and stability and capable of ensuring the safety and continuity of production easily.

The invention relates to a temporary supporting frame for steel bridge constructing. The frame comprises a bottom plate frame, a supporting device and positioning frames, wherein a through groove is formed in the middle of the bottom plate frame, the supporting device is mounted at the upper end of the bottom plate frame, and the positioning frames are symmetrically mounted at the upper end of thesupporting device. The frame can solve the problems that an existing supporting frame is generally poor in use effect, inconvenient to install and disassemble, and detrimental to temporary construction and use of a steel structure; the existing supporting frame is low in stability, and is prone to cause steel structure offsetting so as to influence precision of the constructed steel bridge structure; and meanwhile, the existing supporting frame is poor in universality effect, only adapts to a steel structure of one shape, cannot support and fix the steel structures with different shapes, andtherefore the using effect of the supporting frame is influenced.

The invention relates to a display device, in particular to a portable display device for construction drawings of a construction site. The technical problem to be solved by the invention is how to design the portable display device for the construction drawings of the construction site, wherein the portable display device is smaller in overall size and is more portable during manual carrying. Inorder to solve the technical problem, the portable display device for the construction drawings of the construction site comprises three supporting columns, wherein a first connecting rod is connectedamong the three supporting columns, and the three supporting columns are distributed in a triangular shape; a fixing rod connected to the top of the supporting column in the middle, and a rotating rod is connected to the fixing rod in a rotary-type mode; and a guide assembly is arranged between the supporting column in the middle and the fixing rod. Drawing is displayed through cooperative operation of the guide assembly, a pull-open assembly and a clamping assembly, and therefore the drawing display effect is achieved.

The invention discloses a supporting structure in a foundation pit row pile enclosure structure. The supporting structure comprises a foundation pit, row piles are arranged on the two sides of the foundation pit, supporting plates are connected to the opposite sides of the row piles in a contact mode, pressing screw rods are movably connected to the upper portions of the opposite sides of the twosupporting plates, control blocks are arranged at the opposite ends of the two pressing screw rods, a transmission box is arranged on the upper sides of the control blocks, a driving motor is arrangedin the middle of the upper side of the transmission box, the output end of the lower end of the driving motor is fixedly connected with a shaft rod, the lower end of the shaft rod penetrates throughthe control blocks to be fixedly connected with a vertical screw rod, the lower portion of the vertical screw rod is in threaded connection with a movable block, the vertical screw rod penetrates through the lower end of the movable block to be fixedly connected with a limiting plate, arc plates are fixedly connected to the two sides of the movable block, second pin rods are fixedly connected to the middles of the arc plates, connecting blocks are movably connected to the outer sides of the second pin rods, and fixing blocks are arranged on the lower sides of the pressing screw rods. The supporting structure is convenient and fast to mount and dismount and easy to operate.