40results about How to "Angle optimization" patented technology

The invention discloses an omni-directional multifunctional wheelchair bed, and belongs to a wheelchair bed; the multifunctional wheelchair bed comprises a base framework, a chair back framework, a seat cushion framework, a wheelchair plate framework, a pedal framework and a lithium battery; the lower end of the chair back framework is hinged with the base framework, and the back end of the seat cushion framework is hinged with the base framework; the seat cushion framework is hinged with a shank plate framework, and the shank plate framework is hinged with the pedal framework; the front part of the seat cushion framework is further hinged with a pedal link rod, and the pedal link rod is hinged with the pedal framework; a first electric push rod is hinged between the chair back framework and the base framework, a second electric push rod is hinged between the seat cushion framework and the base framework, and a third electric push rod is hinged between the shank framework and the seat cushion framework; the lithium battery is installed in the base framework, and the lower part of the base framework is provided with four symmetrical mecanum wheel structures; both sides of the base framework are symmetrically provided with electric lifting handrail structures with adjustable height. The omni-directional multifunctional wheelchair bed can realize the conversion of the wheelchair and the bed, and the handrail height can be adjusted and moved in all directions.

The invention discloses a wheel section steel rim rolling machine. The wheel section steel rim rolling machine comprises a support, wherein the support is provided with a section steel rim rolling concave roller die which is connected with a power transmission device and is a fixed half concave die of a section steel rim; the support and the section steel rim rolling roller die are provided with clamping oil cylinders; the clamping oil cylinder is connected with a movable clamping half concave die of the section steel rim; the movable clamping half concave die is coaxial with the fixed half concave die; the support is also provided with a compression steel rim rolling convex roller die; and two ends of a roller shaft of the compression steel rim rolling convex roller die are connected with a movable support frame which is connected with a movable oil cylinder. The wheel section steel rim rolling machine has rational and compact arrangement and is suitable for rolling various wheel section steel rims, particularly for rolling concave and convex section steel rims, relatively thick section steel rims and large-diameter section steel rims.

The invention discloses a heat exchanger, which comprises a heat exchanging pipe bundle, a shell and pipe plates. The pipe plates are positioned at two sides of the shell. The two ends of the heat exchanging pipe bundle are fixed on the pipe plates and pass through the pipe plates. The heat exchanger is characterized in that the section area size and the distribution of the heat exchanging pipe bundle satisfy Sierpinski carpet type fractal structural characteristics; and the fractal grade number is 2-8 grades. According to the heat exchanger disclosed by the invention, the space of the shell is sufficiently utilized to arrange the heat exchanging pipe bundle maximally so that the heat exchange area is increased; simultaneously, the heat exchanging pipe bundle is in multi-grade array arrangement; the section of the heat exchanging pipe bundle is periodically changed in the shell; the fluid heat exchange field cooperativity is greatly increased; the heat effectiveness (heat exchange quantity / pumping work) of the heat exchanger is increased maximally; and the purposes of effectively exchanging heat and saving energy are achieved.

The invention belongs to the field of development of oil and gas fields and particularly relates to a well pattern optimization method in a large-scale oil field development process. The well pattern optimization method comprises the following steps of: firstly, acquiring oil reservoir data, establishing a three-dimensional digital oil reservoir geological model and simulating an oil reservoir value; secondly, constructing a self-adaptive rule well pattern unit and generating a well pattern; thirdly, calculating economic benefits and evaluating an initial well pattern; fourthly, setting parameters to make preparations for well pattern optimization; fifthly, optimizing the unit and constructing parameters to generate a new well pattern by using a gradient method; and sixthly, calculating and evaluating economic benefits of the new well pattern and carrying out iterative operation until an optimal well pattern is generated. According to the well pattern optimization method disclosed by the invention, the well pattern is optimized by using the optimization theory, so that an optimal well pattern form can be found; the well pattern optimization is combined with injection-production optimization to optimize the optimal injection-production amount under different well pattern forms; the corresponding optimal total injection-production amount is obtained while the well pattern form is optimized; and well patterns with various rules can be optimized.

The invention discloses trimming forceps for electric power overhaul. The trimming forceps for electric power overhaul comprises a first forceps head and a second forceps head; a hook head is arrangedat one end of each of the first forceps head and the second forceps head; and peeling teeth are arranged between the first forceps head and the second forceps head. A wire groove is provided, so thatthe included angle between a first handle and a second handle is changed; the position of a fixed buckle can be changed according to the hand size of different people, a screw rod on the surface of the fixed buckle is loosened, the fixed buckle slides into a proper round mouth and the screw rod rotates to fix the fixed buckle; when the wire is trimmed, the hand presses the first handle and the second handle, a first rotating rod and a second rotating rod rotate by taking a movable rotating shaft as an axis; and after the wire is cut off or the wire is clamped, the first handle or the second handle is loosened, two extruding sleeve edges are mutually separated through the double elastic force effect of a spring and the extruding sleeve edges, and the first rotating rod and the second rotating rod avoid too large included angle between the first handle and the second handle.

The invention relates to a protective fence structure for municipal engineering, and relates to the technical field of municipal engineering. The protective fence structure comprises a plurality of connected fence units, each fence unit comprises a first rod body and a second rod body which are vertically arranged, a plurality of first folding parts and second folding parts which are arranged in parallel at intervals are connected between the first rod bodies and the second rod bodies, and a rotary connecting part is connected between each first folding part and each second folding part. According to the protective fence structure, the included angle can be formed between the adjacent first folding parts and second folding parts through the rotary connecting parts, so that the fence structure can easily adapt to the shape of the periphery of a construction site, then the position reserved for passing of pedestrians and vehicles can be enlarged, and adaptability is good.

The invention relates to a solar lamp post which comprises a lamp post body. The lamp support is fixed on the lamp pole and is used for supporting a lamp; the motor supporting rod is fixed on the lamp pole and transversely extends; the middle part of the triangular motor supporting seat is fixedly arranged at the transverse outer end of the motor supporting rod, and the motor supporting seat comprises three vertexes and connecting rods for connecting the adjacent vertexes; the solar cell panel is provided with three ball sockets; by sending a solar cell panel azimuth angle adjusting instruction to each programmable linear motor, the solar cell panel azimuth angle can be automatically, accurately and conveniently adjusted in three degrees of freedom, so that the included angle between the solar cell panel and sunlight is kept optimized, and photoelectric conversion output as large as possible is obtained; through the structure of the motor supporting seat and the pivotable cooperation of the three programmable linear motors and the three pairs of spherical parts-ball sockets of the solar cell panel, the stability in the azimuth angle adjusting process can be improved.

The invention discloses a multi-channel sectional-type bar screen comprising a frame, a screen surface, a vibrator and an under-screen hopper. The screen surface, the vibrator and the under-screen hopper are fixed on the frame; the screen surface is fixed on a screen frame which is connected with the vibrator; and the under-screen hopper is arranged below the screen frame which comprises a first lateral plate, a second lateral plate and a middle lateral plate separating the space between the first lateral plate and the second lateral plate into more than two channels. The invention has simpleand compact structure, low cost, convenient disassembly, great processing capability and high screening efficiency and can realize the scaled multi-channel sectional-type bar screen of a screen machine.

The invention relates to an electric lifting armrest structure, belonging to an armrest structure. The electric lifting armrest structure comprises a fixing framework, an armrest framework, first connecting rods, second connecting rods, third connecting rods, fourth connecting rods and an electric push rod, wherein the first connecting rods are hinged to the armrest framework, the first connecting rods are hinged to the fixing framework, the second connecting rods are hinged to the armrest framework, the second connecting rods are hinged to the fixing framework, the third connecting rods are hinged to the second connecting rods, the third connecting rods are hinged to the fourth connecting rods, the fourth connecting rods are hinged to the fixing framework, the push rod end of the electric push rod is simultaneously hinged to the third connecting rods and the fourth connecting rods, the tail end of the electric push rod is hinged to the lower part of the fixing framework, the fixing framework, the armrest framework, the first connecting rods and the second connecting rods form a parallelogram-shaped connecting rod mechanism, and the second connecting rods, the third connecting rods, the fourth connecting rods and the fixing framework form a trapezium-shaped connecting rod mechanism. The electric lifting armrest structure has the advantages of simple design, operation convenience, strong adjustability and good stability.

The invention provides a coal underground gasification simulation experiment system. The coal underground gasification simulation experiment system comprises a gas injection device, a coal gasification device and a gas collection and treatment device which are sequentially connected through pipelines; the coal gasification device is used for combusting and gasifying a coal sample in the coal gasification device under the simulated formation condition by using oxygen and water vapor injected by the gas injection device so as to generate synthesis gas; the gas collection and treatment device is used for purifying and separating the synthesis gas; and the side wall of a gasification container of the coal gasification device is provided with a plurality of injection-production holes located in the same horizontal plane, and the injection-production holes are used for insertion of injection-production pipes so as to supply or output the gas to the coal sample. During an experiment, the two injection-production holes can be selected according to the included angle between two horizontal wells in the horizontal direction, the injection-production pipes are inserted into the two injection-production holes respectively for the gasification simulation experiment, the condition that the coal underground gasification efficiency is highest when the included angle between the two horizontal wells in the horizontal direction is the required angle can be determined through multiple experiments, and then the included angle between the two horizontal wells is optimized.

The invention discloses a corrugated roll adopting a corrugated structure capable of reducing gram weight of paper without reducing paperboard intensity, and relates to corrugated rolls for processingcorrugated boards. The corrugated roll adopting the corrugated structure, capable of reducing gram weight of the paper without reducing paperboard intensity is characterized in that a second corrugated top arc r2 is introduced in the corrugated top arc of the corrugated roll adopting the corrugated structure. Through the adoption of the corrugated roll adopting the corrugated structure capable ofreducing gram weight of paper, without reducing the paperboard intensity disclosed by the invention, the service life of the corrugated roll can be greatly prolonged; stressing state and impacting state of corrugated core paper during meshing shaping are improved; the corrugated core paper is in wider, continuous and gentle contact with the corrugated top arc, so that damage during shaping is reduced; the corrugated contact state is improved, the tension factor in a meshing region is reduced, and damage to the corrugated core paper in the meshing region caused by continuously-increased tension is reduced; the corrugated roll is well positioned, and deviation and vibration are reduced; the corrugated waist length of the corrugated paper is increased, and the paperboards are firm; the paperutilization rate of the corrugated roll is reduced; under the premise that the glue applying capacity is constant, the bonding region is wider, and adhering is more effective; the state of impressionof the paperboards can be obviously improved; and for low-gram weight corrugated core paper, the beneficial effects of the corrugated roll adopting a corrugated structure are better.

The invention discloses a tension feedback robot joint connection mechanism, comprising a chassis, the upper surface of the chassis is rotatably connected with a rotating plate, and the upper surface of the rotating plate is fixedly connected with a frame, the frame is L-shaped and located The middle part and the top of the frame are respectively equipped with a lifting mechanism and a clamping mechanism. The beneficial effect of the present invention is: through the interconnection of multiple articulated arms and transmission arms, only one cylinder needs to be used to expand and contract to drive each component to move, and the interaction between them is constant. Shrinkage, so as to achieve clamping, without worrying that the joints will be affected by the obstruction of the line, it is safer and more reliable; by setting an adjustable lifting mechanism, it is convenient to support the workpiece, which is suitable for workpieces of different heights. Thread grooves are set at the bottom to facilitate the adjustment of the orientation of the entire device; by setting a cylinder on one side of the seesaw, the angle between the entire joint part and the support plate can be adjusted to expand the scope of application.

The invention relates to a plastering trowel capable of conveniently filling and applying wall cement. The plastering trowel comprises a handle and a trowel plate and is characterized in that the handle is fixedly mounted on the upper surface of the trowel plate through a support rod; a support plate is fixedly mounted at the rear end of the trowel plate; clamping rotary shafts are arranged on theleft side and the right side of the trowel plate, and a limit rotary shaft is arranged at the front end of the trowel plate; a clamping plate sleeves each clamping rotary shaft, a limit plate is arranged on the limit rotary shaft, a squeezing plate is slidably arranged on the support rod, and the squeezing plate is wider than the trowel plate; the upper edge of the inner plate surface of each clamping plate protrudes towards the interior of a storage box to form a wedge; a transmission rod is mounted on the squeezing plate in a hinged manner, and the upper end of the transmission rod is hinged to a driven handle arranged on the handle. The plastering trowel is novel in structure, capable of removing cement transferring frequency, capable of reducing the workload of construction workers, capable of effectively increasing the efficiency of wall cement applying and capable of effectively preventing cement dripping and harm to the skin.