88 results about "Maximal diameter" patented technology

A lens assembly has a driving actuator which includes a magnet, a yoke and a coil and is formed along a lens barrel that accommodates a lens unit for focusing and an auto-focus controlling apparatus comprises the lens assembly for camera module. The magnet or the coil has an internal diameter smaller than a maximal diameter of the lens barrel. Therefore, it is possible to manufacture much smaller lens assembly according to the present invention compared to the conventional ones and to reduce the possibility of component damages in the lens assembly in operating the camera module.

The invention relates to fair-faced concrete. The fair-faced concrete is prepared from a binding material, a composite water reducer, water and aggregate, wherein the amount of the binding material in the fair-faced concrete is 380-480kg/m<3>; the binding material comprises the following components in parts by weight: 45-70 parts of cement, 10-30 parts of coal ashes and 20-50 parts of granulated blast-furnace slag; the amount of the composite water reducer accounts for 0.5%-1.1% of the binding material; the composite water reducer comprises a polycarboxylate superplasticizer, a defoamer, an air entraining agent and a tackifier; the amount of water accounts for 0.32-0.45 times of the binding material; and the balance is the aggregate. The invention further relates to an application of the fair-faced concrete in ocean engineering construction. The fair-faced concrete provided by the invention is excellent in chloride ion permeability resistance, smooth in surface, and uniform in color and luster; the sum of the area of air bubbles of which the surface area is greater than 1m<2> is not greater than 6*10<-4>m<2>; the maximal diameter of the air bubbles is not greater than 5mm; the depth is not greater than 5mm; and the fair-faced concrete is low in air content and bleeding rate, and can be used in an ocean environment for a long period of time.

The method comprises: 1) getting the sequence image after the massive transfusion rotation stops in crash; 2) making preprocess for the sequence image; 3) completing the extraction of motion particle in the sequence image; 4) selecting the multi-step threshold method to gradually determining the optimal partitioning threshold of the micro foreign substance grey scale image to realize the partitioning for the motion target; 5) using the eight connected domain mark to mark the connected area of foreign substance, and calculating the internal maximal diameter of same connected area; 6) making calculation for the target maximal diameter and eccentricity to estimate the quality state of the transfusion and to make classification for the type of the foreign substance; finally, sending out the control signals.

The present invention provides an adhesive resin composition which has high heat conductivity and no easy adhesion force and insulation reduction. The adhesive resin composition comprises the following components: epoxy resin (which comprises epoxy resin of which the mass is above 50wt% relative to total mass of the epoxy resin and epoxide equivalent is 150-220), curing agent which is composed of imidazolium compound, phenoxy resin and aluminum oxide powder, wherein ammonium ion in the cured object is less than 50wtppm. Maximal diameter of the aluminum oxide powder is less than 120 mu m, and the proportion of crystal spherical aluminum oxide in total aluminum oxide powder is above 90wt%. The diameter arrangement of the crystal spherical aluminum oxide satisfies the following conditions: i) the particles of which the average diameter D50 is 35-50 mu m and the ratio (volume average diameter)/(number average diameter) is 1.2-2.0 account for 30-50wt%; ii) the particles of which the average diameter is 5-15 mu m and the ratio (volume average diameter)/(number average diameter) is 2.0-3.5 account for 30-50wt%; and iii) the particles of which the average diameter D50 is 0.1-2 mu m account for 10-30wt%.

The invention relates to an explosive welding method for a zirconium-steel-zirconium three layer pipe. An outer zirconium pipe in an outer zirconium pipe-steel pipe-inner zirconium pipe has the diameter of 60-505 mm and the thickness of 1-8 mm, and a steel pipe has the diameter of 55-500 mm and the thickness of 8-200 mm; the inner diameter of the steel pipe is 4-6 mm larger than the outer diameter of an inner zirconium pipe, and the inner diameter of the outer zirconium pipe is 4-6 mm larger than the outer diameter of the steel pipe; the inner diameter of the inner zirconium pipe is 10-15 mm larger than the maximal diameter of a buffer cone; the explosive welding method comprises the following steps of carrying out the surface treatment and alignment of a base pipe, treating the zirconium pipe; guaranteeing the straightness of the zirconium pipe; assembling which comprises the steps of matching, vertically mounting the inner zirconium pipe, the outer zirconium pipe and the steel pipe on a technological bottom plate and mounting a pressure reduction cone at the center inside the inner zirconium pipe; carrying out re-explosive-cladding which comprises the steps of horizontally placing the device assembled on an explosive table, additionally mounting a pipe-shaped outer frame at the outer part of an outer steel pipe, and uniformly placing explosives around the pipe-shaped outer frame and the buffer cone of the inner pipe and denotating through detonators placed at the top of the buffer cone; and firmly binding the surfaces of the zirconium pipe and the steel pipe under high braking pressure.

The invention provides a non-metal pipeline hydraulic pressure seepage verifying attachment. A system of the non-metal pipeline hydraulic pressure seepage verifying attachment comprises a rectangle framework body, a bell end bulkhead, a jack bulkhead, a pipeline holt hoop iron, a jack, a water flooding pressure measurement system on the bell end bulkhead, and an operation method. The invention is characterized in that: the rectangle framework body forms a rectangle through channel steel welding, length of the rectangle is set according to length of a segment of pipeline, width of the rectangle is set according to a maximal diameter of a detected pipeline, and the rectangle framework body is provided with the pipeline holt hoop iron inside; one end of an intake and exhaust connecting pipe is connected with the bell end bulkhead, the other end of the intake and exhaust connecting pipe is connected with one end of a pressurization opening valve, an intake and exhaust valve and a pressure maintaining opening valve respectively, the other end of the pressurization opening valve is connected with a pressurization pressure gauge, and the other end of the pressure maintaining opening valve is connected with a pressure maintaining pressure gauge; the operation method is carried out according to certain steps. The verifying attachment has small investment, low cost and low technology difficulty, and is applied to a field pipeline construction site and a small scale pipeline production manufacturer.

The invention discloses a storage card for a surface-mounted component, a feeder and an automatic chip mounter. The storage card for the surface-mounted component provided by the invention includes a rectangular card having a front surface, a rear surface, a left surface, a right surface, an upper surface and a lower surface, wherein the area of each of the front and rear surfaces is more than that of each of the other four surfaces; the card is provided with a plurality of component bins penetrating through the card and used for accommodating chip components; the cross section of the component bin is polygonal, circular or oval in shape; when the cross section of the component bin is polygonal in shape, the longest diagonal line of the cross section of the component bin is smaller than the body diagonals of the chip components; when the cross section of the component bin is circular or oval in shape, the maximal diameter of the cross section of the component bin is smaller than the body diagonals of the chip components. The storage card is simple in structure, high in package density, compact in volume, low in costs, easy to put in and take out the chip components, and good in popularization prospect.

The invention discloses rapid clamping and lifting equipment for motor equipment. The rapid clamping and lifting equipment comprises lifting equipment, two groups of two pairs of fixing blocks are oppositely arranged on a bearing framework, two fixing blocks in each group always keep parallel, a buffer block is fixed on the inner wall, facing the fixing block, of the bearing framework, the four fixing blocks adsorb and clamp the motor equipment from two directions when the novel structure is used, a buffer air bag is also adsorbed and clamped; the fixing blocks and the buffer air bag are arranged in a disc shape, the minimum diameter of the fixing block is equal to the maximal diameter of the buffer air bag, the fixing block and the buffer air bag are fixedly connected, the lower end faceof an antislip friction block and a limiting block are always on the same horizontal plane, the limiting block inclines outside on the basis of the buffer air bag, the buffer air bag and the fixing block adsorb and clamp a product stably when the structure works, the cushioning between the buffer air bag and a contact surface of the motor equipment is good, and the airtightness is better.

A gastroretentive drug delivery system is provided. Said system comprises a hollow vesicle and a drug-containing layer which surrounds the hollow vesicle. Said hollow vesicle preferably has a single chamber structure. The size in maximal diameter direction of said hollow vesicle is preferably 0.5-3.5 cm. The gastroretentive drug delivery system preferably contains an isolating layer and/or waterproofing layer between the hollow vesicle and the layer containing drug.

The invention relates to a composite tubular pump device which comprises a water inflow runner (1), a semi-vertical semi-bulb water inflow structure, a horizontal water pump unit and a water outflow runner (10) which are connected sequentially, wherein the semi-vertical semi-bulb water inflow structure comprises a metal shell; the metal shell comprises an upper vertical well (6) and a lower bulb body (7), wherein the cross section shape of the upper vertical well is a walnut-shaped streamline shape with two tip ends and a large middle part; the maximal width of the upper vertical well is the same with the maximal diameter of the lower bulb body; and a motor (2) of the horizontal water pump unit and a transmission device (4) are installed in the metal shell. The semi-vertical semi-bulb water inflow structure is adopted for the composite tubular pump device provided by the invention, and integrates the advantages of a vertical-well-type tubular pump device and a bulb-type tubular pump device, thus a favorable water inflow condition can be provided for the water pump, the energy property and cavitation erosion of the water pump are exerted, the structure is compact, the ventilation and heat radiation conditions are good, the pump unit is convenient to install and overhaul, and the composite tubular pump device is good for running and managing.

A fan includes a housing and a motor. The housing has a compartment, at least one lateral air inlet and at least one lateral air outlet. The lateral air inlet and lateral air outlet communicate with the compartment. The motor has a stator and an impeller. The impeller is coupled with the stator and includes a hub and a plurality of blades coupled with a top face of the hub. Each blade has first and second ends. The first ends of the blades face outwards, and the second ends of the blades define an air-guiding room encompassed by a virtual geometric pattern formed by a virtual line linking the second ends of the blades. The virtual geometric pattern has a maximal diameter. A gap is formed between the second ends of two adjacent blades. The gap is smaller than the maximal diameter of the virtual geometric pattern.

The invention discloses a two-stage coal gas generating device, which solves the problems of the traditional coal gas generator that the air distribution is non-uniform, the utilization rate of the coal is low, and the gas yield is low. A grate bar of a six-layer composite structure is adopted, so that the maximal diameter of the grate bar can reach 3.22m, the inner diameter of an entire furnace can reach 4 to 20m, the utilizable area inside the entire furnace is increased, the coal gas output of a single furnace is improved, two elongated air distribution ports, i.e. an upper air distribution port and a lower air distribution port with inclination angles of 27 DEG and 22 DEG are respectively arranged in an air outlet of the grate bar, the elongated upper air distribution port and the elongated lower air distribution port are staggered to each other to integrate the air distribution of an upper large inclination angle and the air distribution of a lower small inclination angle, so that the gasification agent is more uniformly distributed in the generator through the alternating air distribution, the gasification is more adequate, the heat efficiency is greatly improved, the energy is saved, the air distribution in the entire generator is uniform, the coal gas yield is high, the coal gas quality is stable, less land area is occupied, and the energy conservation and consumption reduction can be better realized; and the two-stage coal gas generating device is applicable to different two-stage coal gas generators.

The invention discloses a cutter for processing a step hole workpiece on a lathe and a using method thereof. The cutter is formed by sequentially integrating a first cutting section, a second cutting section, a third cutting section with maximal diameter, a cutter transition section and a cutter matching section, wherein the first cutting section comprises a first cutting body, two symmetrical first cutting body blades and a first cutting body chip discharge groove; the second cutting section comprises a second cutting body, two symmetrical second cutting body blades and a second cutting body chip discharge groove; the third cutting section comprises a third cutting body, two symmetrical third cutting body blades and a third cutting body chip discharge groove; and the sizes of the first cutting body, the second cutting body and the third cutting body are suitable for a step hole workpiece. The cutter for processing the step hole workpiece on the lathe and the using method thereof can process the qualified step hole workpiece in such a way by utilizing the lathe, the step hole workpiece is processed and finished at one step, the processing efficiency is improved, and the processing cost is reduced.

The invention discloses a production method for preparing a low-water-peak large-diameter optical fiber preform sleeve pipe. The method comprises the steps that: 1, a hollow quartz blank piece is prepared with a plasma horizontal solid-phase external deposition method, such that the diameter of the blank piece reaches 150-160mm; and 2, smelting is continued on the basis of the blank piece with the plasma vertical solid-phase external deposition method, such that a quartz pipe piece with a maximal diameter larger than 300mm is produced. According to the invention, plasma flame heating is adopted, and horizontal process is combined with vertical process, such that the problem of the impossibility of realizing large-diameter blank piece load bearing of a traditional horizontal plasma solid-phase external deposition method is solved. The obtained large-diameter blank piece is further processed into the low-water-peak large-diameter optical fiber preform quartz sleeve pipe. The product provided by the invention has the advantages of high purity, less bubble, low hydroxyl group, and high strength. The method can be applied in the field of low-water-peak optical fibers.

The invention discloses a double-rod variable-orifice passive single-control variable-damping magnetorheological damper and belongs to the field of variable-damping magnetorheological fluid instruments. The variable-damping magnetorheological damper comprises a rheological fluid cylinder body, two end cover modules identical in structure, and two magnet piston modules. The two magnet piston modules are identical in structure and are symmetrically arranged in the rheological fluid cylinder body. The magnet piston modules comprise piston bodies, piston rods, permanent magnets arranged on the inner sides of the piston bodies, and magnet protective layers arranged on the permanent magnets. Orifices with the unchanged internal diameters are formed in the piston bodies. A gradually-changing throttling column parallel to the piston rods is arranged between the two end cover modules. The gradually-changing throttling column is a conical rod, the diameter of the middle of the gradually-changing throttling column is maximal, the diameters of the two ends of the gradually-changing throttling column are minimal, and the diameters of the other portions of the gradually-changing throttling column linearly change. The internal diameters of the orifices are equal to the maximal diameter of the gradually-changing throttling column. The magnetorheological damper is reasonable in structure and free of energy consumption, and damping force has no upper limit range.

The present invention relates to a hob type shearer roller which is particularly fit for the exploration of a gangue coal bed and a harder coal bed. The hob type shearer roller comprises a cylinder hub, spiral vanes and an end plate which are arranged on the cylinder hub, cutting picks on the spiral vane, a pick holder and end plate cutting picks. The diameter of the spiral vane is increased gradually from the end plate. The diameter of the spiral vane is maximal at the middle position of the cylinder hub and then is reduced gradually. The diameter of the spiral vane at the two ends of a cylinder body is equal to the diameter of the end plate. The cutting pick elevation angle at the position of the maximal diameter of the spiral vane is zero, and the rest cutting picks incline for certain degrees towards the two sides on the boundary; the cutting picks at the side of the end plate incline towards the end plate; the cutting picks at a goaf side incline towards the goaf side; the whole structure of the roller is the hob type. The roller uses the characteristic that coal rock can resist pressure but can not resist pull, except the cutting picks at the position of the maximal diameter of the spiral vane, the rest cutting picks are all arranged slantways; the cutting picks at the position of the maximal diameter of the spiral vane of the roller are that the cutting picks at the two sides cut a free surface, thereby not only improving the cutting efficiency but also improving the efficiency of cutting range coal.

A plate steel that displays great HAZ toughness under high heat input weld and has excellent shearing property without shear fissure even if it is cut by a shearing press. The plate steel of the invention adjusts chemical components properly and meets formulae (1) and (2) and has tissue with bainite ratio that is above 95 area%. Average diameter of equivalent circle of a block size of the bainite is below 40 microns and a difference of a maximal diameter of equivalent circle of a block size of the bainite and the average diameter of equivalent circle is below 40 microns. [Ti]/[N] is more than or equal to 1.5 but less than or equal to 4.0 (1); X is more than or equal to 40 but less than or equal to 160 (2), X=500[C]+32[Si]+8[Mn]-9[Nb]+14[Cu]+17[Ni]-5[Cr]-25[Mo]-34[V], (in the formula, [] represents content (mass%) of each element.

The invention discloses a method for determining the compression parameters of a modular satellite, which is used for determining the diameter and the screwed force of compression screw rods and comprises the steps of: (1) determining a longitudinal load Fq and a transverse load Fh applied to the whole satellite; (2) determining the number n of screw rods selected during the overall design of the satellite, and determining the length L of the screw rods according to the sum of the heights of various modules; (3) calculating the diameter and the screwed force of the screw rods, which are required to ensure the compression between the satellite modules under the action of the longitudinal load Fq; (4) calculating the diameter and the screwed force of the screw rods, which are required to ensure the compression between the satellite modules under the action of the transverse load Fh; and (5) taking the maximal diameter and the maximal screwed force of the screw rods as the finally needed minimal diameter and minimal screwed force of the screw rods according to the results of the step (3) and the step (4). The method of the invention provides a guidance method for the compression design of the screw rods of the modular satellite, and can improve the deficiency that selection and experimental verification are performed only according to experience.