238results about How to "Improve stress conditions" patented technology

The invention relates to a differential column-splitting inlet energy dissipater, comprising a water current inlet section, a stilling pool connected with the water current inlet section, and an apron connected with the stilling pool; the water current inlet section is composed of a high-level drainage channel (drainage hole) and a lower-level drainage channel (drainage hole) which are arrayed alternatively, a slim is arranged at the boundary position of a drop-sill of the outlet end part of the high-level drainage channel of the water current inlet section and the lower-level drainage channel and a bottom plate of the stilling pool, the slim is a right-angle wedge shape, the bottom surface of the right-angle wedge shape is arranged on the bottom plate of the stilling pool, and the side surface vertical to the bottom surface of the right-angle wedge shape is attached to the drop-sill of the outlet end part of the high-level drainage channel of the water current inlet section and the lower-level drainage channel, a tail sill of the stilling pool is a differential tail sill, and the top surface of the differential tail sill is formed by a combined surface unit I and a combined surface II which have different structures and are arrayed alternatively; a middle isolated pier tail between the high-level drainage channel and the lower-level drainage channel is a cantilever type streamline pier tail. The energy dissipater can improve the service life and reduces scouring damage of water current to downstream river channels.

The invention provides a full-scale-movement linear circulating accelerated loading test system. The full-scale-movement linear circulating accelerated loading test system comprises a machine frame, a guide rail, two or more rolling wheel sets and two chain transmission pairs, wherein a front walking and guiding wheel and a back walking wheel are fixed to the lower part of the machine frame through a lifting mechanism; the guide rail is arranged on the machine frame; the upper loading surface of the guide rail is a linear section; the lower loading surface of the guide rail is shaped like a boat bottom; the two ends of the upper loading surface and the lower loading surface are connected in smooth transition through curved sections; the guide rail adopts a box-type structure and is internally filled with a shock-absorbing material; each rolling wheel set comprises two loading wheels and a rolling wheel; the rolling wheel is positioned between the two loading wheels and is coaxial with the loading wheels. The full-scale-movement linear circulating accelerated loading test system adopts a design scheme that the chain transmission pairs drive the rolling wheel sets, a chain and the rolling wheel sets are assembled together through chain pin shafts and connecting components, and the axes of wheel axles of the rolling wheel sets are vertical to and intersected with the longitudinal centerline of the chain; the full-scale-movement linear circulating accelerated loading test system is simple in structure, high in reliability and low in using cost and maintenance cost; the distance from the loading wheel to the rolling wheel is small, the stress condition is good, noise is low, and the efficiency is high.

The invention relates to a splicing structure for pipe pieces of an ellipse-like shield tunnel with a stand column. An integral ring is formed by enclosing and splicing the pipe pieces. The adjacent integral ring pipe pieces are spliced to form the splicing structure for the pipe pieces of the shield tunnel. The splicing structure is characterized in that the cross section of the splicing structure for the pipe pieces of the shield tunnel is a double-axis symmetric smooth ellipse-like part provided with the center stand column and formed by four sections of inferior arcs, the double-axis symmetric smooth ellipse-like part comprises a top arc, a bottom arc, a left side arc and a right side arc, the top arc with the large radius and the bottom arc with the large radius are arranged vertically and symmetrically in the opposite directions, and the left side arc with the small radius and the right side arc with the large radius are transversely and symmetrically arranged in the opposite directions. The spliced joints of the adjacent integral ring pipe pieces on the cross section keep away from the most unfavorable stress part of the tunnel structure, and the adjacent integral ring pipe pieces are spliced through staggered joints. Annular connectors and the longitudinal connectors of the pipe pieces are connected through bolts and hand holes, plane contact pulling and anchoring type lacework box type hand holes are adopted in the annular connectors, and high bearing force is achieved. The splicing structure has the advantages that a tunnel arc bearing structure and the high rectangular structure space utilization rate are combined; the longitudinal hand holes are in double-axis symmetric arrangement, and one set of pipe pieces can meet the requirement for staggered joint splicing.

A universal water-turbine engine pertains to an impact water-turbine engine which converts pressure energy of current to kinetic energy and converts the kinetic energy to rotating mechanical energy in the hydraulic machinery; the water-turbine engine consists of a or a plurality of jet orifices, a device corresponding to the jet orifices, a or a plurality of turning wheels arranged on a main axis for the universal water-turbine engine, a tailrace arranged under the turning wheel, a speed governor, a driving device and other parts. The water-turbine engine can develop and exploit all waterpower resources and has high efficiency, large capacity, safe and reliable performance, simple and reasonable structure as well as low manufacturing cost; the application of the water-turbine engine significantly promotes the current development and exploitation of the waterpower resource, thus being capable of marking a new epoch of rapid development of the hydroelectric power industry.

The invention discloses a fill channel anti-frost heaving and anti-seepage structure and a construction method. The structure is characterized in that drainage channels are arranged on the two sides of the channel; a wind-blown sand layer is arranged on the bottom and two sides of an embankment of the channel; a plastic film is arranged on the wind-blown sand layer; a slope toe on a connection position of the bottom and the embankment of the channel is cast-in-place concrete; prefabricated concrete blocks are laid on the plastic film; and a capping concrete board is arranged on the top of the embankment of the channel. The construction method comprises the following steps: digging a drainage open channel; clearing channel base earth; carrying out filling to form the embankment of the channel; laying wind-blown sand; laying the plastic film; casting the arc channel-bottom concrete in place; laying the prefabricated concrete blocks; and laying the capping concrete board. The problems of the common channel design such as seepage, frost heaving and destruction, and not stable quality are eliminated, the wind-blown sand layer is arranged on the bottom and the two sides of the embankment of the channel, the foundation bearing force is increased, the frost heaving is lightened; the polyethylene plastic film is laid on the wind-blown sand layer to prevent seepage of the channel; concrete is arranged on the film to prevent water flow from scouring and seeping; the concrete arc channel bottom is cast in place, the stress condition is good and the stress concentration is prevented; and the drainage open channel prevents underground water retention and eliminates frost heaving.

The invention discloses a high-rigidity lock for quick connection. Wherein, it is formed by a frame, an inner support plate, a spring plate, a bottom plate, an eccentric wheel, and a spring; the frame and the bottom plate form one rectangle space with a round hole; said round hole contains one eccentric wheel; the front of spring plate is mounted with lock hooks that reversed bended; it is characterized in that: the inner support plate is at the middle of spring plate, while its two sides are supported by frame; the front of lock has one taper guide block. Compared with present technique, in said invention, the lock hook is supported on the inner support plate; the inner support plate is riveted on the frame; two sides of inner support plate bear symmetry forces, to support the lock hook and confirm enough rigidity; the guide block is taper, therefore, the lock hook can be easily inserted into the locked element.

The invention discloses a retractable support leg, which comprises a fixed support leg (10) and a movable support leg (20). When the movable support leg (20) stretches in place, coincidence portions of the movable support leg (20) and the fixed support leg (10) which are nested mutually are positioned and connected by a movable hinge pin, both the movable support leg (20) and the fixed support leg (10) are provided with pin holes, a retractable cylinder (30) of the movable support leg (20) can slide within small displacement range along a stretching and retracting direction, and is provided with a transmission component, and the movable hinge pin is driven to be inserted or withdrawn from the pin holes via the transmission component when the retractable cylinder (30) slides. Coincidence lengths of the movable support leg and the fixed support leg of the support leg are shorter, spreading span of the support leg can be increased, stability of an integral vehicle can be further improved, simultaneously, a stressed manner of the support leg can be improved, and structural reliability is enhanced. The invention further discloses an engineering machine comprising the retractable support leg.

A rigid plugging method for a mine tailings pond drainage well includes: casting in situ to form a concrete plugging block at the junction of the drainage well and a drainage channel, embedding a drainage steel pipe in the casting process, setting a pebble layer on the concrete plugging block, setting a gravel layer on the pebble layer, setting a nonwoven geotextile layer I on the gravel layer, setting a coarse tail sand layer on the nonwoven geotextile layer I, wrapping the entry end of the drainage steel pipe with multiple layers of nonwoven geotextile, placing the entry end in the pebble layer above the concrete plugging block at a drainage well section, and placing the exit end of the steel pipe outside the concrete plugging block at a drainage channel segment; at the exit of the drainage channel, setting a bagged coarse tail sand layer I in the water flow direction, setting a nonwoven geotextile layer II outside the bagged coarse tail sand layer I, setting a bagged coarse tail sand layer II outside the nonwoven geotextile layer II, and setting a bagged gravel layer outside the bagged coarse tail sand layer II. According to the method, by improving stress conditions of a plugging member, plugging failure can be effectively avoided, and construction is simple, fast, economical and environmentally friendly.

The invention discloses an annular feed path planning method of integral impeller rough machining. According to the method, an existing bilateral-offset feed mode is replaced by the feed mode perpendicular to the impeller axial direction, each transverse cutting path perpendicular to the impeller axial direction is connected through an arc feeding and retracting cutter to form an annular cutting path, and a layer of rough machining path is composed of a plurality of annular cutting paths. By means of the method, through reasonable machining feed path planning, the total length of the feed paths is shortened, and the problem of the low machining efficiency caused by redundant machining feed paths existing in a traditional integral impeller rough machining method is solved.

The embodiment of the invention discloses a car table plate. The car table plate comprises a bottom plate for carrying a car and a supporting beam which is arranged on the side edge of the bottom plate and used for supporting the whole car table plate in a unilateral stress supporting mode, and the supporting beam and the bottom plate are integrally formed or fixedly connected. A guide portion is arranged on the supporting beam. The car table plate is unilaterally hung and supported through the supporting beam on the side edge, the structure is simple and firm, use is safe and reliable, and dismounting, mounting and replacing are convenient. The embodiment of the invention further discloses a three-dimensional parking device which comprises the car table plate, a stand column, a lifting mechanism, a horizontal moving mechanism, a rotary mechanism and a supporting guide mechanism. The supporting guide mechanism comprises a supporting sliding seat with a supporting portion, and the guide portion and the supporting portion are matched to enable the supporting beam to be movably arranged on the supporting sliding seat. The car table plate of the three-dimensional parking device is directly mounted on the supporting sliding seat in a hanging mode, the car table plate is even and stable in stress, safe and reliable to use and long in service life, the height of the car table plate away from the ground is small, the car can get on and off the car table plate conveniently, production cost is saved, and dismounting, mounting and replacing are convenient.

The invention provides a high-conductivity aluminum alloy plate extrusion forming device and technology. The forming device is an extrusion mold which comprises an extrusion rod, an extrusion cylinder, a flow guide mold and a forming mold; an extrusion groove of the flow guide mold is designed to be inverted conical; and the shapes of the extrusion groove of the forming mold and a forming element are keep to be consistent. The forming technology comprises the steps of preparing aluminum alloy blanks, preheating a mold, spraying graphite, and extruding and forming an aluminum alloy plate. Metal materials provided by the invention are not formed once in the forming process, and are subjected performing and final forming; stress produced in the forming process is reduced; the deformation texture in the aluminum alloy plate is increased; and the conductivity performance and heat conduction capability of products are improved greatly.

The invention relates to an earth and rockfill dam core wall hydraulic fracture test device. Specifically, a water inlet hole is additionally arranged on a base of an ordinary triaxial apparatus pressure chamber corresponding to the test sample center position, a vertical sleeve with threads is fixed on the water inlet hole, a rotary hollow cylindrical steel member with the barrel wall is positioned in the sleeve, a water spray hole is previously arranged at the certain position between the sleeve and the barrel wall of the member, hydraulic pressure can be injected through the water inlet hole additionally arranged on the base, and a fracture water head is arranged at the position of the water spray hole. The earth and rockfill dam core wall hydraulic fracture test device overcomes the defects of presently using a hollow test sample directly to carry out hydraulic fracture tests, solves the problem that centrifugal hydraulic fracture tests are not obvious in soil arch effect, reasonably reflects hydraulic fracture conditions and action methods, and is suitable for determine earth and rockfill dam core wall hydraulic fracture tests and fracture water heads.

The invention discloses a fracture patient rescue robot which is composed of a vehicle body and an actuating mechanism. The actuating mechanism comprises a lifting mechanism, a sliding stretcher and two operating arms of six degrees of freedom. The sliding stretcher has an upper layer and a lower layer, the lower layer is a protective shell and the upper layer is a belt drive device. The lifting mechanism is composed of a vehicle body telescopic connecting bar fixed with the vehicle body, a stretcher connecting bar fixed with a lower layer movable stretcher and a telescopic bar. One end of the vehicle body telescopic connecting bar is movably connected with one end of the stretcher connecting bar, both ends of the telescopic bar are respectively connected with the lower layer movable stretcher and the vehicle body, and the vehicle body telescopic connecting bar and the telescopic bar are respectively driven by a worm and gear. The two operating arms of six degrees of freedom are installed symmetrically at the front portion of the sliding stretcher. According to the sliding stretcher, full consideration is given to human body structure and injury particularity, the operational process of the double-position automatic registration and fusion scanning board meets standards of human body first-aid operations, and damage to the human body in an operational process is reduced to the maximum extent.

The invention discloses a down-hole steam injection string of a thick-oil thermal production well. The down-hole steam injection string is capable of protecting a casing in a steam injected well, improving the dryness of steam at the bottom of the well, and improving the steam injection heat efficiency and the steam injection effect. The steam injection string comprises a heat insulation pipe and a wall-hook packer; the heat insulation pipe, a backwashing valve and a sealed telescopic pipe are orderly connected to form an internal steam injection string; the wall-hook packer is orderly connected with a sealing sleeve and a switch assembly to form an external steam injection string; the wall-hook packer of the external steam injection string is down and sealed and hung on the inner wall of the casing; the sealed telescopic pipe of the internal steam injection string is inserted in the switch assembly of the external steam injection string and is capable of sliding in the sealing sleeve. The down-hole steam injection string of the thick-oil thermal production well can be reused after being put down once; the steam injection quality is obviously improved, the oil-steam ratio is increased, and an obvious oil increasing effect is achieved. The down-hole steam injection string of the thick-oil thermal production well is simple in structure and reliable in working; besides, the swept volume of the steam and multi-turn steam injection efficiency are improved, the energy source is thoroughly saved, the casing is effectively protected, and the defect of leakage at the wellhead casing head of the existing steam injection string is eliminated.

The invention provides a mobile linear circulating-type acceleration loading test system. The mobile linear circulating-type acceleration loading test system comprises a frame, a guide rail, more than one of rolling wheel groups and two chain transmission pairs. The guide rail is arranged on the frame, an upper loading surface on the guide rail is a straight-line segment, a lower loading surface is in a hull bottom shape, two ends of the upper loading surface and the lower loading surface are connected through curve segments in a smooth and transition mode, the guide rail is in a box type, and is filled with a damping material; each rolling wheel group comprises two loading wheels and a rolling wheel, and the rolling wheel is positioned between the loading wheels and coaxially arranged. The system employs a design scheme for driving the rolling wheel groups by the chain transmission pairs, a chain is assembled with the rolling wheel groups together through a chain pin and a connecting piece, the wheel shaft axis of the rolling wheel group and the longitudinal center line of the chain vertically intersect, the structure is simple, reliability is high, usage maintenance cost is low; loading wheelspan rolling wheel distance is short, the bearing condition is good, the noise is little, and the efficiency is high.

The invention discloses an integral prestress reinforced earth retaining wall construction method. The method comprises the steps of excavating an earth retaining wall foundation trench, pouring a concrete floor of an earth retaining wall, arranging vertical rebars, laying geogrids and geotechnical cloth, refilling a backfill material by certain thickness, overturning the geogrids and geotechnical cloth to wrap the backfill material inside, refilling the backfill material multiple times to the designed height of the earth retaining wall, pouring a top plate, tensioning and locking the rebars, and driving a pre-stressed anchor cable to a side slope from the edge of a concrete cover plate. According to the method, by arranging ribs in the horizontal direction and applying prestress in the vertical direction, cost is lower compared with a reinforced concrete retaining wall; the mechanical property of reinforcement materials is fully utilized, the integral type earth retaining wall is formed, and pouring of a concrete panel is not needed. The method has the advantages that construction is easy, economic effectiveness is high, and implementation effect is good.

The invention relates to a high-low ridge stilling pool achieving double-layer disperse energy dissipation. The high-low ridge stilling pool comprises a falling-ridge water flow inlet section, a stilling pool body, a stilling pool tail ridge and an apron; the falling-ridge water flow inlet section is composed of high-ridge flow drainage holes, low-ridge flow drainage holes and partition walls, wherein the high-ridge flow drainage holes and the low-ridge flow drainage holes are arranged in a combined mode, and the partition walls are located between the high-ridge flow drainage holes and the low-ridge flow drainage holes; the stilling pool body comprises an upper stilling pool body and a lower stilling pool body, the upper stilling pool body is connected with the water flow inlet section, the floor elevation of the upper stilling pool body is equal to the elevations of the outlet ends of the low-ridge flow drainage holes, the lower stilling pool body is located behind the upper stilling pool body, and the floor elevation of the lower stilling pool body is lower than that of the upper stilling pool body; the stilling pool tail ridge is located at the tail portion of the stilling pool body, and the apron is connected with the stilling pool body. The high-low ridge stilling pool can reduce impact to the front portion of the high-low ridge stilling pool caused by discharged flow and homogenize the concentrated energy dissipation region of the front half portion of the high-low ridge stilling pool, the effect of double-layer disperse energy dissipation is achieved, and the phenomena of violent water flow turbulent fluctuation and great water surface fluctuation of the concentrated energy dissipation region are eliminated.

The invention relates to a spring-propped bridge reinforcing structure. In the structure, an intact pillar is fixed on a middle cushion cap and supports the slab cross beam of an irregular bridge slab by a support; the structure is characterized in that at least one unit spring-propped reinforcing structure is arranged at the periphery of the intact pillar and comprises two symmetrical pier columns, an n-shaped steel bent cap and two symmetrical dynamometry-adjustable supports; the lower bottom slabs of the two symmetrical pier columns are in threaded connection with the middle cushion cap, the n-shaped steel bent cap is of a symmetrical n-shaped structure and is symmetrically and fixedly arranged at the tops of the two symmetrical pier columns, and the two ends of the upper part of the n-shaped steel bent cap are supported at the lower part of the slab cross beam by the two symmetrical dynamometry-adjustable supports. The structure is used for reinforcement under the condition that key parts of the irregular slab crack seriously and have insufficient bearing force; a loaded reinforcing method is implemented, construction process is simple, and complicated prestress steel bundle construction process and the anchoring structure are avoided, and a good reinforcement effect is achieved.

The invention relates to a supporting-rod two-blade large-diameter changing reaming tool for mineral resource exploiting and oil-gas well underground reaming and solves the problem of underground large diameter changing reaming. According to the technical scheme, a main cylinder is in threaded connection with a blade seat, and three through grooves are formed uniformly in the main cylinder peripherally. A water nozzle is in threaded connection with a central tube, and three sliding blocks penetrate the three through grooves to be mounted in an inner central tube circular groove. The middle of an outer central tube is fixedly connected with a sliding block through screws a, and the lower portion is fixedly connected with a supporting rod seat through screws b. Cutting teeth are inlaid in the outsides of the blade wings, and the blade wings are hinged to the blade wing seat through bolts. The ends of supporting rods are hinged to the supporting rod seat, and the other ends are hinged to the blade wings. By means of the tool, the largest diameter after diameter changing can be more than three times of the largest diameter before diameter changing, the mechanical structure is reliable, and a hydraulic drive mode is used, so that the tool is simple to control and is used for underground reaming.

The invention discloses a hinge movable dam, which consists of a plurality of movable dam units, wherein the lower end of the water retaining dam face (1) of each movable dam unit is connected with a gate bottom tilting fillet (3) through a gate hinge (2). The hinge movable dam is characterized in that a hydraulic oil cylinder (5) is connected to the middle part of the inner side of each water retaining dam face (1); the hydraulic oil cylinders (5) are connected through synchronous motors (21); a support rod (7) is connected to the upper part of the inner side of each water retaining dam face (1); a chain (20) is connected to the lower end of each support rod (7), and is connected to a driving chain wheel (15) and a driven chain wheel (15'); each driving chain wheel (15) is connected with a driving shaft (16); each driven chain wheel (15') is connected with a driven shaft (16'); each driving chain wheel (16) is connected with a hydraulic motor (18). The hinge movable dam is simple and practical in structure, convenient to use, high in damage prevention capability, long in service life, safe and reliable, and has a good floodwater draining effect, water blocking is avoided, and good stress conditions are ensured.