41results about How to "Offset self-weight" patented technology

A three-degree-of-freedom parallel attitude-adjusting and vibration-isolating platform comprising tower-shaped telescopic branches comprises a base, three mounting seats, three linear driving units, the three tower-shaped telescopic branches, three vibration isolators, a boosting spring and a moving platform, wherein the mounting seats are fixedly connected onto the base; double linear modules of the linear driving units are fixedly connected onto the mounting seats and driven by driving motors; each tower-shaped telescopic branch comprises two closed-loop connecting rods and a planar scissor structure, two tower feet at the lower end of the planar scissor structure of the tower-shaped telescopic branch are connected with two sliding blocks of the double linear modules by the aid of first and second kinematic pairs, the upper end of the tower-shaped telescopic branch is a rotating pair for connecting the two closed-loop connecting rods, a rotating shaft of the rotating pair is connected with one end of the vibration isolator by the aid of a third universal hinge, and the other end of the vibration isolator is fixedly connected with the moving platform; the lower end of the boosting spring is fixedly connected onto the base, and the upper end of the boosting spring is a free end. The three-degree-of-freedom parallel attitude-adjusting and vibration-isolating platform is high in rigidity, high in bearing capacity and large in working space.

The invention discloses a deep sea net box cultivating apparatus for offshore wind field, which comprises an offshore wind turbine foundation, wherein an operation platform is mounted on the top portion of the offshore wind turbine foundation; a rotary sleeve ring fixing system is mounted on a lower end of the offshore wind turbine foundation; the rotary sleeve ring fixing system is connected to a rotary arm mechanism; the rotary arm mechanism is connected to an offshore net box module through a cable connecting rod component; the rotary sleeve ring fixing system comprises a reinforced cylinder sleeve; an upper rotary sleeve ring and a lower rotary sleeve ring are respectively mounted on an upper end and a lower end of the reinforced cylinder sleeve; and the upper rotary sleeve ring and the lower rotary sleeve ring are respectively connected to the rotary arm mechanism through an upper connecting buckle and a lower connecting buckle. According to the utility model, by adopting the apparatus provided herein, the offshore wind field can be applied with various purposes; organic combination between the offshore wind power generation and the offshore net box cultivation is realized; the space of the offshore wind field and the offshore wind power are fully utilized, thus improving the overall economy benefits.

The invention discloses a caisson and pile combined foundation of consolidated subsoil and a construction method of the caisson and pile combined foundation. The caisson and pile combined foundation of the consolidated subsoil comprises the consolidated subsoil, a sand-gravel cushion, a caisson, bored piles, pile bottom grout, top seal concrete and scour protection. The main construction method comprises the following steps: consolidating the foundation with an underwater compaction sand pile or a deep-layer cement mixing pile; laying the sand-gravel cushion on the consolidated subsoil; sinking the caisson with a skirt, pile sinking guide holes and grouting reserved pipes on the sand-gravel cushion; after the caisson is located, constructing bored piles through the pile sinking guide holes; after construction of the bored piles, casting the top seal concrete at the bottom in the caisson; grouting the bottom of the caisson through the grouting reserved pipes at the bottom of the caisson, carrying out pile bottom grouting through grouting pipes in the pile, and at last casting the top plate of the caisson. In the construction process, the scour protection shall be performed around the caisson according to requirements. The caisson and pile combined foundation of the consolidated subsoil and the construction method of the caisson and pile combined foundation, disclosed by the invention, can effectively improve vertical and horizontal bearing capacity of the caisson, and control sedimentation and horizontal displacement of the caisson.

The invention discloses a plant protection drone. The plant protection drone comprises a drone body, a spray bar and a plurality of spray heads, wherein the spray bar comprises an inner spray bar andan outer spray bar; one end of the inner spray bar is connected with the drone body; the other end of the inner spray bar is connected with the outer spray bar; during working, the outer spray bar canbe rotated in a vertical plane relative to the inner spray bar to move to a vertically downward position or a horizontal position; and the spray heads are arranged on the inner spray bar and the outer spray bar along the length direction of the spray bar at intervals. The plant protection drone disclosed by the invention has the beneficial effects that when the plant protection drone works, the outer spray bar can be rotated in a vertical plane relative to the inner spray bar to move to a vertically downward position or a horizontal position, so that the horizontal spraying and the longitudinal spraying of a medicine can be realized and the plant protection drone can adapt to various sprayed objects, is suitable for spraying needs of different crops and different environments, meets practical application needs and has strong practicability and a broad application prospect.

The invention discloses a support device for a B type enclosure system of a large LNG carrier. The support device comprises a first cylinder bearing wood and a second cylinder bearing wood; the secondcylinder bearing wood is arranged on the periphery of the first cylinder bearing wood in a sleeving mode to form a supporting main body, and the upper end face of the supporting main body is providedwith an upper panel and the lower end face of the supporting main body is provided with a lower panel; an upper part criss-cross bracket plate is arranged on the upper surface of the upper panel, anda lower part criss-cross bracket plate is arranged on the lower surface of the lower panel; and an upper part support circular ring and a lower part support circular ring are separately arranged on the outer wall of the second cylinder bearing wood, an upper part circular ring bracket plate is arranged on the outer side of the upper part support circular ring and is fixed on the lower surface ofthe upper panel, and a lower part circular ring bracket plate is arranged on the outer side of the lower part support circular ring and is fixed on the upper surface of the lower panel. The support device for the B type enclosure system of the large LNG carrier is simple to manufacture and easy to install, and the supporting main body can simultaneously transmit loads in the vertical and horizontal directions and can withstand any load in the horizontal direction, so that the action of rolling and pitching is prevented.

The invention relates to a mechanical arm end two-section-type stabilizing device for craniotomy. The device comprises a fixing module, a first-stage cushioning module and a second-stage cushioning module, the fixing module comprises a fixing frame and an L-shaped connecting plate, the fixing frame comprises a first horizontal plate, a second horizontal plate and a vertical plate, the two ends ofthe vertical plate are connected to the edges of the same sides of the first horizontal plate and the second horizontal plate respectively, one end of the L-shaped connecting plate is connected to thevertical plate, and the other end is connected to an end joint of a mechanical arm; and the second-stage cushioning module comprises a lower supporting plate and two cushioning units, each cushioningunit comprises a guide rod, a cushioning spring and a limiting unit, the first-stage cushioning module comprises two supporting leg units, and each supporting leg unit comprises a supporting pipe, asupporting leg spring, a sliding block and a supporting rod. Compared with the prior art, the device has the effects of buffering and protecting two times of drilling and milling force sudden changes,guiding the track of the end of a drilling and milling cutter, relieving the holding strength of a doctor on instruments an operation and preventing stall instability.

The invention belongs to the technical field of heating furnaces and more particularly relates to a device for opening and closing a furnace door of a heating furnace, in particular to a furnace door lifting device with counterweights. The furnace door lifting device comprises an electromotor, a first short link chain, a second short link chain, a third short link chain, a forth short link chain, a fifth short link chain, a double-row driving chain wheel group, a single-row driven chain wheel group, first counterweights, a second counterweight and a furnace door frame; the counterweight is suspended at one end of the first short link chain and one end of the second short link chain, and the first counterweight is positioned in a first furnace door upright internal cavity of a first furnace upright; the other end of the first short link chain bypasses a first chain wheel and a third chain wheel in sequence and is connected to a second hanging point on the furnace door, and the other end of the second short link chain bypasses the second chain wheel and is connected to a first hanging point on the furnace door; the second counterweight is suspended at one end of the third short link chain, and the second counterweight is positioned inside a second furnace door upright internal cavity of a second furnace door upright. The furnace door lifting device disclosed by the invention has the characteristics of safety, stability and good economic efficiency.

The invention discloses a magnetic suspension door and window for a building structure. The magnetic suspension door and window are characterized by comprising a frame, a door and window body and a supporting unit; the frame is used for being fixed to the building structure, the door and window body comprises at least one covering material, an excitation array is arranged between the frame and the door and window body and comprises a first excitation unit and a second excitation unit, the first excitation unit is fixed to the frame body, the second excitation unit is fixed to the door and window body, and longitudinal stretching resistance and transverse compression resistance are generated between the first excitation unit and the second excitation unit.

The invention belongs to the field of electrical equipment, and relates to a sliding high voltage cable floating combination fixing device which comprises a lower plate component and an upper plate component connected to the surface of the upper portion of the lower plate component. A cable clamp is fixed on the top face of the upper plate component. The lower plate component comprises a bottom plate, a lower guide rail arranged on one side of the surface of the bottom plate, and a lower connection seat arranged on the other side of the surface of the bottom plate. The upper plate component comprises a top plate, an upper guide rail arranged on one side of the bottom face of the top plate, and an upper connection seat arranged on the other side of the bottom face of the top plate. The sliding high voltage cable floating combination fixing device is reliable in effect, when the sliding high voltage cable floating combination fixing device is used, cable moving can be limited in the vertical direction, and disorderly deviation can not occur; meanwhile, due to the effect of a spring, when a cable ascends through thermal stress, spring force can effectively counteracts the weight of the upper plate component, and resistance of the cable in the ascending process can not be increased.

The invention discloses a cantilever type water retaining door which comprises two water retaining door sheet mechanisms. The two water retaining door sheet mechanisms are opposite and are symmetrically arranged along the middle plane, in the vertical direction, of a door and window hole. According to each water retaining door sheet mechanism, a door sheet containing box is fixedly connected with the inner wall of one side of the door and window hole, a water retaining door sheet is arranged in the door sheet containing box, a lifting lug ring is arranged in the middle of the water retaining door sheet, one side of one end of the water retaining door sheet is hinged to the ground through a two-way vertical hinge, and the side face of the other side of one end of the water retaining door sheet is hinged to the ground through a detachable one-way hinge; one end of a lifting lever is hinged to the middle of the interior of the door sheet containing box, the other end of the lifting lever is fixedly connected with one end of a connecting iron chain, and the other end of the connecting iron chain is fixedly connected with the lifting lug ring. The cantilever type water retaining door is of a cantilever type structure, reverse acting force is provided through a gas spring, lever and iron chain transmission is achieved, most of the dead weight of a door sheet is offset, and operation is easy.

The invention discloses a novel buoyancy type open caisson and a construction method thereof, and belongs to the technical field of bridge deep water open caisson foundation construction. The novel buoyancy type open caisson comprises an open caisson body, first shear force tenons, second shear force tenons, a bottom layer top seal concrete plate, an upper layer waterstop composite dry beating concrete bottom plate and an open caisson top cover. Well hole units which are arranged in a matrix manner are mounted in the open caisson body, every two adjacent well hole units are partitioned throughan open caisson wall, the first shear force tenons and the second shear force tenons are located on the bottoms of the well hole units, the bottom layer top seal concrete plate is located on the bottoms of the well hole units and is connected with the first shear force tenons, the upper layer water stop composite dry beating concrete bottom plate is in seal connection to the top of the bottom layer top seal concrete plate and is connected with the second shear force tenons, the open caisson top cover is located on the top of the open caisson, and water passing holes communicating with the well hole units are formed in the open caisson top cover. The open caisson has the good waterstop property, when the interior of the open caisson is in the water-free state, the open caisson generates buoyancy, and the aim of settlement after work of an open caisson foundation can be achieved.

The invention discloses a deep sea net box cultivating apparatus for offshore wind field, which comprises an offshore wind turbine foundation, wherein an operation platform is mounted on the top portion of the offshore wind turbine foundation; a rotary sleeve ring fixing system is mounted on a lower end of the offshore wind turbine foundation; the rotary sleeve ring fixing system is connected to a rotary arm mechanism; the rotary arm mechanism is connected to an offshore net box module through a cable connecting rod component; the rotary sleeve ring fixing system comprises a reinforced cylinder sleeve; an upper rotary sleeve ring and a lower rotary sleeve ring are respectively mounted on an upper end and a lower end of the reinforced cylinder sleeve; and the upper rotary sleeve ring and the lower rotary sleeve ring are respectively connected to the rotary arm mechanism through an upper connecting buckle and a lower connecting buckle. According to the utility model, by adopting the apparatus provided herein, the offshore wind field can be applied with various purposes; organic combination between the offshore wind power generation and the offshore net box cultivation is realized; the space of the offshore wind field and the offshore wind power are fully utilized, thus improving the overall economy benefits.

A low clearance single track tunnel contact wire positioning device comprises an arched base, a connecting double lug, a rotating double lug, an elastic insulated limiting positioner and a positioningwire clip; the arched base is fixed on the wall of a tunnel through a bolt; the connecting double lug is fixed at the front end of the arched base through a bolt pair; the rotating double lug is hinged to the front end of the connecting double lug through a pin shaft; the rear end of the elastic insulated limiting positioner is a bent section; the end part of the bent section is hinged between lower lugs at the front end of the rotating double lug through a bolt pin I; an elastic pull rod is mounted at the middle part of the bent section; the upper end of the elastic pull rod is hinged between upper lugs at the front end of the rotating double lug through a bolt pin II; and the positioning wire clip is fixed under the front end of the elastic insulated limiting positioner. According to the low clearance single track tunnel contact wire positioning device, shortcomings in the prior art are eliminated, the elastic uniformity of an overhead line system is improved, the current collectingquality of a pantograph type current collector is improved, and therefore, the safety running of a locomotive is guaranteed.

The invention provides a flow-induced vibration energy collection-based nonlinear vibration system. The system comprises a vibration experiment device and a Vck system connected with a vibration experiment system, wherein the Vck system comprises a servo motor, a servo motor amplifier, a main control panel and a flow velocity sensor; the servo motor converts the rotation speed and torque of a rotation shaft into voltage signals and transfers the voltage signals to the main control panel; the main control panel adjusts extra damp of the system and transmits the signals to the servo amplifier; the servo amplifier amplifies the signals and feeds back the signals to the servo motor, so as to adjust damp of the system; and the flow velocity sensor is connected with the main control panel and transfers the flow velocity information to the main control panel. The system is convenient to use, moderate in cost and modularized in design; and after debugging, experiment ca be carried out on a plurality of modules, so that relatively accurate and favorable experiment effect can be achieved. The system is improvement of original linear spring rigidity vibration subsystems, and is capable of overcoming the defect that the original systems cannot completely simulate the viscosity damp of the systems so that the experiment is closer to the practical condition.

The invention relates to a cable-stayed arch bridge. The bridge comprises an arch bridge body, comprising arch ribs and arch feet at the two ends of the arch ribs, two bridge towers, arranged at the two ends of the arch rib respectively, the bridge towers being arranged on the arch feet at the same end, and the bridge towers inclining outwards in the longitudinal bridge direction; a tensioning part, comprising upper inhaul cable sections arranged above the two ends of the arch rib respectively and lower cable penetrating sections arranged below the arch rib, one ends of the two upper inhaul cable sections being connected to the bridge towers at the same end respectively, and the other ends of the two upper inhaul cable sections being connected with the two ends of the lower cable penetrating sections respectively; and a support part, the two ends of the supporting part being connected with the lower cable penetrating section and the arch rib correspondingly, and the supporting part being used for supporting the arch rib. The bridge tower generates inclined downward pressure on the foundation in the extending direction of the bridge tower, and the horizontal component force of the pressure can balance the outward horizontal thrust generated by the arch ribs on the arch feet. The bridge towers at the two ends incline outwards to tighten the tensioning parts, the tensioning partsprovide supporting force for the arch ribs through the supporting parts, and the supporting force can reinforce the bridge and improve the bearing capacity of the bridge.

The invention relates to an axial force self-balancing vertical centrifugal pump. The axial force self-balancing vertical centrifugal pump comprises a pump shell and a vertical pump shaft. The upper end of the pump shaft is connected with a motor, the lower end of the pump shaft extends into the pump shell and is connected with an impeller in the pump shell to drive the impeller to rotate, and thepump shell is provided with a water outlet. The water inlet end of the impeller is upward. The axial force self-balancing vertical centrifugal pump further comprises a water inlet, a height difference exists between the water inlet and the impeller in the vertical direction, and the water inlet is located above the impeller. The shaft segment, below the impeller, of the pump shaft is connected with the pump shell through a bearing so that stability can be improved. According to the axial force self-balancing vertical centrifugal pump, the loss of flowing energy of the fluid in the pump is small, the pump shaft is retained to be connected with the bearing of the pump shell, and the pump shaft rotates more stably. The water inlet end of the impeller is upward, during working, the fluid is sucked in through the water inlet, the fluid flows to the position above the axis position of the impeller through a suction runner and is further sucked in through the impeller and then thrown out, due to the reactive force of the fluid, the impeller can transit upward axial force to the pump shaft, the dead load of a rotor system is offset and balanced, the axial load is small, correspondingly, the failure rate is reduced, and the service life is prolonged.

The invention discloses a double-roller linkage winding type lifting system. The double-roller linkage winding type lifting system comprises a first lifting roller and a second lifting roller, and thefirst lifting roller and the second lifting roller are in engaged linkage through an engagement structure on the outer circumference or are in linkage through linkage middleware; the first lifting roller is wound with a first lifting rope, the second lifting roller is wound with a second lifting rope, and the first lifting rope and the second lifting rope are not connected with each other. The double-roller linkage winding type lifting system can increase the energy efficiency ratio of an extradeep well lifting system.

The invention provides a low-damping ratio flow-induced vibration experimental device based on an electronic spring. The device comprises a cylindrical vibrator, a slider, a slide rail, a timing beltand timing belt conveying wheels. Upper and lower ends of the slide rail are fixedly connected. Both ends of the cylindrical vibrator are connected with the slider. The slider matches the slide rail.Timing belt conveying wheels are arranged above and below the slide rail. The timing belt conveying wheels match the timing belt. Both ends of the slider are connected with the timing belt. A transmission wheel on the upper side of the slide rail is connected with the rotating shaft of the cylindrical vibrator. The rotating shaft is connected with a Vck system. The shortcomings that a traditionalflow-induced vibration experimental device is difficult to change physical springs and damping and cannot completely simulate the linear viscous damping of a system are overcome. An experiment can change parameters accurately and quickly, and acquired experimental data are more reliable.

The invention discloses an underwater cleaning device and an underwater robot system. The underwater cleaning device comprises a cleaning device inner cavity; one end of the cleaning device inner cavity is connected with an external high-pressure rubber pipe through a first rotary joint, and high-pressure water is injected through the external high-pressure rubber pipe; the other end of the cleaning device inner cavity is connected with a cavitation jet rod through a second rotary joint; rotation of the first rotary joint and rotation of the second rotary joint do not interfere with each other; a first fixed pipe is coaxially arranged outside the first rotary joint, and a second fixed pipe is coaxially arranged outside the second rotary joint; a cleaning disc is fixedly connected between the first fixed pipe and the second fixed pipe, an opening of the cleaning disc faces one side of the cavitation jet rod, and the cavitation jet rod is located in the opening of the cleaning disc. According to the cleaning device, the underwater robot clamping operation can be carried out to carry out underwater automatic cleaning operation, the manual labor intensity is greatly relieved, and attached marine organisms and dirt can be safely and efficiently removed.

The invention relates to an efficient child-mother cylinder and a hydraulic control system thereof. The efficient child-mother cylinder comprises a mother cylinder body, a child cylinder body and a piston rod. At least one mother cylinder mold closing oil inlet and at least one differential oil inlet are formed in the top of the mother cylinder body, and a mold opening oil inlet is formed in the bottom of the mother cylinder body. The child cylinder body is slidably arranged in the mother cylinder body, and the lower end of the child cylinder body extends out of the cylinder body, so that a mold closing cavity and a mold opening cavity are formed in the mother cylinder body. A mold closing channel extending into the child cylinder body is arranged at the upper end of the child cylinder body. The upper end of the piston rod is fixed to the mother cylinder body, and the lower end extends into the mold closing channel. The piston rod is of a hollow structure, and a child cylinder mold closing oil inlet is formed in the upper end of the piston rod. According to the efficient child-mother cylinder and the hydraulic control system thereof, the mother cylinder mold closing oil inlets are formed in the mother cylinder body so that a large amount of oil can be conveniently fed into the mold closing cavity, and meanwhile, hydraulic oil in the mold opening cavity can be guided into the mold closing cavity through the differential oil inlets, so that the mold closing speed is high, the working efficiency is improved, the output force is large, and the requirement of a large-load occasion can be met.

The invention discloses an electric supporting rod with an overload protection function. The electric supporting rod comprises a telescopic rod body of the electric supporting rod, wherein a first telescopic rod capable of driving the electric supporting rod to stretch out and draw back is connected into the telescopic rod body in a sliding mode, a telescopic structure is arranged in the first telescopic rod, and a first shell is fixedly connected to one end of the first telescopic rod; a first rotating mechanism for driving the telescopic structure to stretch out and draw back is rotationallyconnected into the first shell, a second shell is fixedly connected to the outer side wall of the first shell through a switching part, a first containing cavity is formed in the second shell, a second rotating mechanism is rotationally connected into the first containing cavity, and a motor for driving the second rotating mechanism to rotate is further arranged in the second shell; a third rotating mechanism is arranged in the switching part, the second rotating mechanism is rotationally connected with the first rotating mechanism through the third rotating mechanism, the second rotating mechanism comprises a first rotating shaft with one end rotationally connected with the motor, and an overload protection mechanism is rotationally connected to the outer side wall of the first rotatingshaft; and a first gear is rotationally connected to the outer side wall, away from the motor, of one end of the first rotating shaft, the first gear is connected with a filtering protection mechanismin an inserted mode, and the first gear is rotationally connected with the first rotating mechanism through the third rotating mechanism.

The invention provides a full terrain profiling device of a harvester and relates to the technical field of agricultural machinery. Suspension devices are separately arranged at the two sides of a header (6), each suspension device comprises a sliding sleeve (9), a suspending guide bar (10) and a suspension spring (12), the sliding sleeves (9) are fixed to side faces of the header (6), the suspending guide bars (10) penetrate into the sliding sleeves (9), lower ends of the suspending guide bars (10) are connected with fixed knife parts (8) of a cutter knife (5), upper ends of the suspension springs (12) are connected to the side faces of the header (6), lower ends of the suspension springs (12) are connected to the fixed knife parts (8) of a cutter knife (5), the suspending guide bar (10)at one side is fixedly connected with a shaft bracket (11), a rocking lever transmission shaft (3) is arranged at one side of the header (6) and is rotatably connected with the shaft bracket (11) through a bearing (14), and a rocking lever (4) is connected onto the rocking lever transmission shaft (3) at the outer side of the bearing (14)through a hinge part. The full terrain profiling device hasthe advantages that the structural design is reasonable, and the profiling of the cutter knife is more flexible.

This invention relates to a coaxial motor system, a generator system and a motor system; the coaxial motor system comprises at least one pair of magnetic-suspension energy-storing flywheel motors which are mounted coaxially, wherein the one pair of magnetic-suspension energy-storing flywheel motors have same structures and inverse running directions and appear zero momentum externally; the magnetic-suspension energy-storing flywheel motors comprise central shafts, stators fixed on the central shafts, flywheel rotors rotationally supported on the central shafts through gyrating shafts, wherein the gyrating shafts comprise axial magnetic-suspension bearings and radial ball bearings which are precisely matched with the central shafts; the outer rings of the ball bearings are elastically matched with the axle systems of the gyrating shafts through elastic sleeve rings so as to form elastic support; because the one pair of magnetic-suspension energy-storing flywheel motors appear zero momentum externally, the stable operation of a system can be ensured, mechanical performance is good, the efficiency of the flywheel motors is increased, the service life of the flywheel motors is prolonged, and cost is low.

The invention provides a dedicated clamp for stretching. The clamp is used for a concrete tensile bonding strength test, and comprises an upper clamp and a lower clamp; the upper clamp comprises two side plates, a pressing plate, a cover plate, and bolts for fixing the side plates and the cover plate; a bending part is arranged at the top of each side plate and used for bearing the cover plate; corresponding through holes for inserting of the bolts are arranged at the bending parts of the side plates and the end part of the cover plate; the lower clamp comprises a groove for holding a test piece, a support plate located in the groove and springs located at the bottoms of the support plate and the groove. Through the dedicated clamp for stretching provided by the invention, a clamping testpiece can be adhered at the side, the eccentric force influence is eliminated, the first damage in the test piece in the test is avoided, the bonding surface damage is guaranteed, and the test successful rate is guaranteed; and the spring of the lower clamp can counteract the dead weight of the test piece when clamping the test piece, the test piece can counteract the dead weight in the stress testing, and the experimental result is accurate.

The invention discloses a pneumatic balance assistant lifting device. The pneumatic balance assistant lifting device mainly comprises a base, a support column, a cylinder, a large swing arm, a small swing arm, a front pulley assembly, a rear pulley assembly, a steel wire rope and a lifting hook. The support column is fixed in the appropriate position by the base and is connected to the large swing arm through a lug and a rotation shaft. The cylinder is fixed on the large swing arm. One end of the steel wire rope is connected to the cylinder through a connection part. The other end of the steel wire rope is connected to the lifting hook. The middle of the steel wire rope carries out non-slip friction through the pulley assemblies on the small swing arm. The device utilizes the principle of the pneumatic self-balancing of the cylinder and the principle of small pulley turning and friction, solves the problem that a heavy object manual carrying process has the defects of large labor strength, high time consumption and high cost, can realize the lifting, translation and dropping of heavy objects and utilizes a small swing arm folding mechanism so that the utilization of space is improved.

The invention relates to a ship bottom silt removal robot. The ship bottom silt removal robot is used for removing the tilt at the bottom of an iron ship. The ship bottom silt removal robot comprisesa vehicle frame, four crawler walking mechanisms mounted on the vehicle frame, a buoyancy mechanism and a silt removal mechanism, and both sides of the bottom of the vehicle frame extend downwards toform two wing panels. The four crawler walking mechanisms are separately arranged at four corners of the vehicle frame. Each of the crawler walking mechanisms comprises a first motor and two magneticwheels, and the two magnetic wheels are connected by crawlers in a transmission mode. The silt removal mechanism comprises a first brush roller and a second brush roller. The first brush roller and the second brush roller are driven to rotate by a driving mechanism.

The invention discloses a caisson and pile combined foundation of consolidated subsoil and a construction method of the caisson and pile combined foundation. The caisson and pile combined foundation of the consolidated subsoil comprises the consolidated subsoil, a sand-gravel cushion, a caisson, bored piles, pile bottom grout, top seal concrete and scour protection. The main construction method comprises the following steps: consolidating the foundation with an underwater compaction sand pile or a deep-layer cement mixing pile; laying the sand-gravel cushion on the consolidated subsoil; sinking the caisson with a skirt, pile sinking guide holes and grouting reserved pipes on the sand-gravel cushion; after the caisson is located, constructing bored piles through the pile sinking guide holes; after construction of the bored piles, casting the top seal concrete at the bottom in the caisson; grouting the bottom of the caisson through the grouting reserved pipes at the bottom of the caisson, carrying out pile bottom grouting through grouting pipes in the pile, and at last casting the top plate of the caisson. In the construction process, the scour protection shall be performed around the caisson according to requirements. The caisson and pile combined foundation of the consolidated subsoil and the construction method of the caisson and pile combined foundation, disclosed by the invention, can effectively improve vertical and horizontal bearing capacity of the caisson, and control sedimentation and horizontal displacement of the caisson.

The invention relates to the technical field of pipe butt, and discloses a precision equipment pipe butt centering device. The precision equipment pipe butt centering device comprises a shell, whereineight limit pipes are inserted outside the shell, and the four of the eight limit pipes are symmetrically distributed as a group; pressure plates are welded on the tops of the limit pipes; the tops of the pressure plates are provided with openings communicating with the limit pipes; the bottoms of the pressure plates are rotationally connected with turntables; and the turntables are annular. By means of the precision equipment pipe butt centering device, adjusting springs are installed between top rods and connecting blocks, adjusting rods are pressed into slots during using, at the moment, compression grooves are at the same level with clamping rods, then the top rods are pressed downward, thus, the clamping rods are pressed into the compression grooves through the curved surfaces duringmoving with the top rods, and according to the model of a butt pipe, the top rods are moved to the application positions, so that the top rods compress the adjusting springs to apply a pre-applied force to the connecting blocks, the self weight of the pipe is offset, and therefore, the centering error is reduced and the quality of a product is ensured.

The invention discloses a cantilever type water retaining door, comprising: two water retaining door plate mechanisms, the two water retaining door plate mechanisms are facing each other, the two water retaining door plates are arranged symmetrically along the median plane in the vertical direction of the door and window opening, each The water retaining door mechanism includes: the door plate storage box is fixedly connected with the inner wall of one side of the door and window opening; the door plate storage box is provided with a water retaining door, and the middle part of the water retaining door is provided with a lifting earring; The vertical hinge is hinged with the ground, and the side of the other side of one end of the water flap is hinged with the ground through a detachable one-way hinge; one end of the lifting lever is hinged with the middle part inside the door panel storage box, and the other end of the lifting lever is connected with a One end of the iron chain is fixedly connected, and the other end of the connecting iron chain is fixedly connected with lifting earrings. The present invention is a cantilever structure, the reaction force is provided by the gas spring, driven by the lever and the iron chain, offset most of the self-weight of the door panel, and the operation is light.

An upturning structure used for automatic opening and closing of furniture comprises a connecting arm element, a support element, a middle element and an elastic assembly. A connecting arm groove is formed in the connecting arm element. An action portion is arranged on the support element. A moving shaft portion is arranged at one end of the middle support, the middle element is movably arranged on the connecting arm groove through the moving shaft portion, the other end of the middle element is rotationally arranged on the elastic assembly, and the connecting arm element is elastically hingedto the support element through the elastic assembly in an opening and closing manner. When the connecting arm element is hinged and closed to a certain position relative to the support element by opening the end position, the moving shaft portion and the action portion act on each other and slide along the track of the connecting arm groove and / or the action portion through action of the action portion, and the connecting arm element is suspended on the support element when the moving shaft portion slides. When the connecting arm element is hinged and opened to a certain position relative tothe support element by closing the end position, the moving shaft portion and the action portion are separated from each other and located to the connecting arm groove. Through the improvement of thestructure, practicality is high.