200results about How to "Change diameter" patented technology

A projection unit is provided with two stop-changing mechanisms, which are respectively disposed in an illumination optical system and a projection optical system to adjust an effective luminous-flux diameter. A stop controller controls the stop-changing mechanisms in accordance with a brightness level of an inputted video signal to make the effective luminous-flux diameter optimum. This diameter is adjusted so as to be large in a case of a high brightness level, and so as to be small in a case of a low brightness level. When the effective luminous-flux diameter is small, peripheral light of the luminous flux is cut so that contrast becomes high. A screen image is brightly displayed when a picture has the high brightness level, and is displayed in high contrast when the picture has the low brightness level.

The invention relates to the technical field of automobile accessories, in particular to a CVT (Continuously Variable Transmission). The CVT comprises a power source, a first transmission structure, a second transmission structure, a driving belt pulley, a driven belt pulley and a shell, wherein the driving belt pulley comprises a first rotating disc, a first rotating shaft and multiple first supporting blocks; the first rotating disc is rotationally connected with the shell through the first rotating shaft; the first supporting blocks are sequentially arranged on the first rotating disc through the first transmission structure in a surrounding way; the power source is in transmission connection with the first transmission structure; the driven belt pulley comprises a second rotating disc, a second rotating shaft and multiple second supporting blocks; the second rotating disc is rotationally connected with the shell through the second rotating shaft; the second supporting blocks are sequentially arranged on the second rotating disc through the second transmission structure in the surrounding way; the power source is in transmission connection with the second transmission structure. According to the CVT disclosed by the invention, since the friction force between the belt and the first and the second supporting blocks is large, so that belt slipping is reduced, the speed changing efficiency is high, and the service life is long.

A flexible, extendable extension assembly used to create extended length holes and holes through inaccessible areas in walls and framing. The extension assembly including a flexible rod having first and second ends; and a holding means secured to the first end of the rod for releasably holding a tool bit for rotation with the rod.

A flexible, extendable extension assembly used to create extended length holes and holes through inaccessible areas in walls and framing. The extension assembly including a flexible rod having first and second ends; and a holding means secured to the first end of the rod for releasably holding a tool bit for rotation with the rod.

Conveyor chains are provided which comprise free balls which are free to rotate in all directions thereby allowing for the stable conveyance of articles in any direction in the entire horizontal plane and at an increased speed in the direction of conveyance with reduced contamination in the conveyance environment. A conveyor chain 100 comprises a number of chain links 110 comprising a plurality of hinge portions 112 in a zigzag formation protruding from the front and rear end edges that are connected to each other in the longitudinal direction of the chain through hinge pins 120. Free balls 131 protrude from both the surface and back sides of the chain link 110 and are free to rotate while held in the chain link 110. Either the free balls 131 or ball holding portions 132, which hold the free balls 131, is made of polyacetal while the other is made of polyamide or polyester.

An induction heating device or work coil for heating electroconductive material to a desired temperature that can be used on a roll or cylinder of any diameter. The work coil has an open core of ferrite material shaped in a U. Wire is wound around the opposing legs of the U so that on excitation one leg becomes the N pole and the other leg becomes the S pole and the polarity alternates as the polarity of the excitation current alternates. A substantially thin rectangular flat layer of ferrite can be attached to ends of each pole piece. Each layer of ferrite has having a length sufficient to cover bottom end of each leg and a width in the direction of an axis perpendicular to the face of the U that corresponds to the width of the desired control heating effect.

A multilayered gas sensing element includes a solid electrolytic substrate. A measured gas side electrode and a reference electrode are provided on surfaces of the solid electrolytic substrate. The measured gas side electrode is provided in a measured gas chamber. An introducing hole forming layer has an introducing hole for introducing a measured gas from an ambient atmosphere into the measured gas chamber and also providing a diffusion resistance to the measured gas introduced into the measured gas chamber. In manufacturing this gas sensing element, the introducing hole is formed by performing laser irradiation applied to the introducing hole forming layer.

The invention discloses an agricultural perforating device which is convenient for heat dissipation and aperture adjustment, which comprises a base and a top plate. A first through hole is arranged in the middle of the inner part of the base, and universal wheels are arranged on both sides below the base. Both sides above the base are provided with connecting pipes, and the inside of the connecting pipe is provided with a second through hole, the bottom of the connecting plate is provided with a connecting rod, and the inside of the connecting plate is provided with a fixing ring, and the connecting rod A first limit block is arranged on the four sides, a movable block is installed at the upper port of the movable rod, and a magnet block is arranged on the side of the second limit block facing the central axis of the movable rod. The agricultural punching device that facilitates heat dissipation and hole diameter adjustment can ensure that the driver will not be burned out due to excessive temperature when the device works for a long time, and the device can change the diameter of the punched hole, which is convenient for users to choose Appropriate hole diameter to drill.

The invention discloses an oxygen-free copper bar suitable for a cable and a preparing method of the oxygen-free copper bar. The preparing method of the oxygen-free copper bar comprises the following steps that reclaimed copper is added into a smelting furnace to be molten and then refined, impurities are removed, and mixed gas of natural gas and nitrogen is introduced into molten copper for one to two hours for reduction and purification; and the molten copper is covered with crystalline flake graphite, so that a covering layer is formed, bar-shaped Cu-RE alloy penetrates through the covering layer to be added into the molten copper for alloying of rare earth elements, the percentage by weight of the rare earth elements is 0.1%-0.2%, a hollow crystallizer is directly stretched into the molten copper and cooled through a water spacer bush, the molten copper is condensed into a solid in the hollow crystallizer, and the upper end of the solid is drawn into the oxygen-free copper bar through a drawing mechanism.

The invention relates to cleaning radius-variable fan tower cylinder cleaning equipment. The equipment comprises a cleaning chain and an annular base; the cleaning chain and the annular base are connected through a connecting frame; the cleaning chain has an extension ring, and a cleaning device arranged on the extension ring; the extension ring is formed to an annular structure by connecting multiple shearing fork sets end to end; and the extension ring is used for changing the diameter size of the cleaning chain. As the extension ring is formed by connecting the multiple shearing fork sets end to end, and tensioning mechanisms are arranged in hinge points of at least one shearing fork set, the diameter of the extension ring can be changed according to diameters of different fan tower cylinders. The equipment is simple in structure and low in cost, needs no manual aerial operation, is high in safety, is less in water for the cleaning operation, protects the environment, and saves the energy.

The invention discloses a corn thresher capable of carrying out deflecting threshing. The corn thresher comprises a feeding port, a threshing barrel, a bin shell, a corn kernel discharge port and a corncob discharge port, the threshing barrel is obliquely arranged, at least one layer of threshing ribs is arranged on the threshing barrel, each threshing rib comprises an upper threshing rib segment and a lower threshing rib segment, the upper threshing rib segments and the lower threshing rib segments are all spiral threshing ribs and are opposite in spiral direction, the spiral direction of the upper threshing rib is opposite to the rotating direction of the threshing barrel, and the spiral direction of the lower threshing rib segments is identical to the rotating direction of the threshing barrel. The corncob discharge port is formed in the side face corresponding to the connecting positions of the upper threshing rib segments and the lower threshing rib segments. The motion track of corn cobs entering a threshing bin is limited by arranging the deflecting ribs, the height of the threshing bin is changed by changing the barrel diameter of the threshing barrel or the double-layer ribs, and therefore the corn cobs can be fully threshed in different spaces of the threshing bin, the threshing performance can be greatly improved, and the non-threshing work sections of the threshing bin are reduced.

The invention relates to a crowd panic spreading modeling method under disaster conditions on the basis of a kinematics ball model. The method comprises the following steps: 1) mapping evacuation individuals in a crowd into balls, and obtaining the mass of each evacuation individual and a distance between every two evacuation individuals before panic spreading according to the individual key features of the evacuation individuals; 2) importing a disaster risk index which triggers the panic spreading, and calculating the speed of each evacuation individual after the panic spreading is carried out; 3) according to a "mentality-behavior" fluctuation model, obtaining the diameter variable quantity of each evacuation individual under a panic situation so as to obtain the quality variable quantity of each evacuation individual; and 4) according to the steps 1) to 3), establishing a crowd panic spreading model which is expressed by the change of momentum, and showing a panic degree through the change quantity of momentum. Compared with the prior art, the crowd panic spreading modeling method has the advantages that the method is simple and feasible, and the influence of the panic spreading on crowd evacuation can be systemically analyzed and the like.

The invention relates to a suspension type counter weight clinometer and a measurement method. The suspension type counter weight clinometer comprises a winch motor, wherein a steel wire rope winds a winch barrel of the winch motor and penetrates through a fixed pulley fixed at the top of a supporting platform; a floating barrel device is mounted in the middle of the supporting platform; the steel wire rope passes through the floating barrel device; a linear vertical suspension device is connected with the tail end of the steel wire rope and is located in a hole to be detected; and a measuring device is located at an inlet position of the hole to be detected. The clinometer provided by the invention can be used for carrying out high-frequency and high-precision detection in drilling construction with very high perpendicularity requirements; and an efficient and high-precision perpendicularity detection device, which is convenient to mount, has accurate and reliable data and can meet real-time detection requirements, can be provided for a drilling construction site through the clinometer.

Conveyor chains are provided which comprise free balls which are free to rotate in all directions thereby allowing for the stable conveyance of articles in any direction in the entire horizontal plane and at an increased speed in the direction of conveyance with reduced contamination in the conveyance environment. A conveyor chain 100 comprises a number of chain links 110 comprising a plurality of hinge portions 112 in a zigzag formation protruding from the front and rear end edges that are connected to each other in the longitudinal direction of the chain through hinge pins 120. Free balls 131 protrude from both the surface and back sides of the chain link 110 and are free to rotate while held in the chain link 110. Either the free balls 131 or ball holding portions 132, which hold the free balls 131, is made of polyacetal while the other is made of polyamide or polyester.

A plasma processing apparatus includes: a vessel which includes a reaction chamber, atmosphere within the reaction chamber capable of being depressurized; a lower electrode which supports an object to be processed within the reaction chamber; a dielectric member which comprises a first surface and a second surface opposite to the first surface, and which closes an opening of the vessel such that the first surface opposes an outside of the reaction chamber and the second surface opposes the object to be processed; and a coil which opposes the first surface of the dielectric member, and which generates plasma within the reaction chamber. An electrode pattern and an insulation film which covers the electrode pattern are formed on the second surface of the dielectric member.

The invention relates to a radio frequency ion source and belongs to the technical field of plasma application. The radio frequency ion source comprises a quartz tube, a copper tube wound on the outer wall of the quartz tube and a shielding cover used for shielding a radio frequency electric field. The quartz tube and the copper tube wound on the outer wall of the quartz tube are arranged in the shielding cover. An air inlet is formed in the upper end of the quartz pipe. An ion ejecting outlet is formed in the lower end of the quartz tube. Two ends of the copper tube are connected with two ends of a radio frequency power supply. A through hole for plasma to go through is formed at the center of the bottom of the shielding cover. The radio frequency ion source has the advantages that the shielding cover isolates the radio frequency electric field from a cavity and discharging of the cavity is prevented.

The invention discloses an underground water level observer for hydrogeological exploration, and belongs to the technical field of hydrogeological exploration. The underground water level observer for hydrogeological exploration comprises an observation box, the output end of a motor is coaxially connected with a crank A, a water level prompting assembly is fixedly arranged on the left side of the middle of the upper portion of the observation box through a fixing base, a pull rod is rotationally connected to the interior of a shell through a pin shaft, the front end of the pull rod is coaxially connected with an arc-shaped rack, and a middle shaft is rotatingly connected to the middle part of the shell; a plurality of square rods are fixedly arranged at the upper end of the middle shaft in a triangular structure, and the structures are tightly matched, so that when a measurer measures through a conical floating block and a scale rope, when the scale rope reaches the water level, a sound can be made in time to remind the measurer, and the measurer can know whether the rope is excessive or not; therefore, the scale rope collecting and releasing condition can be accurately mastered, the water level observation efficiency is improved, meanwhile, the measurement accuracy is improved, the accuracy of a data collection result is guaranteed, and a powerful guarantee is provided for data analysis.

A liquid ejection apparatus comprising: a liquid ejection head (56) having a nozzle (51) for ejecting a small droplet of a charged solution from a tip portion; an ejection electrode (58) provided on the liquid ejection head for It applies a voltage to generate an electric field to eject the droplets; a voltage applying unit (35) for applying a voltage to the ejection electrodes; a carrier K including an insulating material for receiving the ejected droplets; and an ejection atmosphere adjusting unit (70) for maintaining the atmosphere subjected to ejection by the liquid ejection head at a dew point of 9°C or more and less than the saturation temperature of water.

A roller-adjustable multipurpose winding device comprises a bracket, a roller adjusting device and a motor. The bracket comprises bracket supporting boards and transverse rods, wherein the bracket supporting boards are two parallel vertical boards, the transverse rods are four transverse long rods, one ends of the four transverse rods are fixedly arranged at the four corners of one of the bracket supporting boards correspondingly, and the other ends of the four transverse rods are fixedly arranged at the four corners of the other bracket support board correspondingly. The roller adjusting device is arranged in the bracket and comprises two adjusting device bodies, a center shaft and a movable shaft. The two adjusting device bodies are arranged beside the two bracket supporting boards correspondingly. Each adjusting device comprises a rotating plate, a movable block, a driven gear, a movable shaft hole and a driving gear. The center shaft is a long rod, the two ends of the center shaft penetrate through the two adjusting device bodies and are arranged in center shaft holes in the bracket separately, and the motor is arranged at one end of the center shaft. Three movable rods are used for replacing traditional rollers, the positions of the movable rods are changed by rotating the driving gear, then the diameter of the roller is changed, different wires can be wound by changing the diameters of the rollers, and operation is easy.

The invention discloses a test device and a test method for testing the bearing performance of a pile-end expanded head of a statically-drilled rooted pile. The device comprises a model box, a loadingplate, a counter-force beam, a loading motor, a circular mold, an air compressor and a grout storage tank. The model box is formed by welding a steel plate and internally filled with sandy soil, a pore water pressure sensor, a soil pressure sensor and the circular mold are embedded into the sandy soil; the circular mold is formed by connecting and combining two semicircular aluminum alloy platesthrough bolts; the grout storage tank is a circular bucket storing a cement soil grout, and the grout storage tank, the air compressor and the model box are connected through a grouting pipe, and thegrouting pipe stretches into a reserved space of the circular mold; the loading plate is placed on the upper surface of a sandy soil layer, and an overburden pressure is applied through a jack to simulate different stress levels; and a statically-drilled rooted model pile in the model box can be loaded through the loading motor. The device is reasonable in structure and simple to operate, and provides an effective means for research for the bearing performance of the pile-end expanded head of the statically-drilled rooted pile.

A slip ring is accommodated in a ram 34. The slip ring includes a fixed portion 72 having a feed element connected to a power source and a movable portion 73 electrically connected to the feed element. The movable portion 73 includes a contact 75 for supplying electricity to a spindle unit 100 and an electric device of a spindle head 118. After determining the position of a saddle 32 in a Y-axis direction and the position of a table in an X-axis direction, the position of the spindle head 118 about a B-axis is determined. Then, the ram 34 is moved along the Z-axis direction with the spindle unit 100 revolved about the C-axis, and, with a non-rotational cutting tool 170 attached to the spindle unit 100, a hole is bored in a workpiece W on the table.

The invention discloses an optical fiber skin layer glass for an optical fiber image transmission element and a mechanical pipe-drawing forming method of the optical fiber skin layer glass. The optical fiber skin layer glass composition for the optical fiber image transmission element comprises the following components in percentage by mole: 72.0-80.0% of SiO2, 5.5-7.0% of Al2O3, 2.0-8.0% of B2O3,3.0-8.0% of Na2O, 2.0-7.0% of K2O, 1.0-3.0% of CaO, 0.1-2.0% of SrO, 0.1-2.0% of ZnO, 0.1-0.9% of ZrO2, 0.1-0.9% of TiO2 and 0.1-0.2% of Sb2O3. The preparation method by the mechanical pipe-drawing forming comprises the following steps: melting glass; carrying out clarifying and homogenizing; carrying out pipe-drawing forming; and carrying out cutting and annealing. The disclosed skin material for the optical fiber image transmission element is excellent in chemical property, stable in glass composition, low in refractive index and excellent in anti-crystallization property.

The invention discloses a diameter-adjustable efficient punching device suitable for a furniture plate. The diameter-adjustable efficient punching device comprises a supporting base, a first sliding block, a second sliding block, first adjusting screw rods and first electric telescopic rods, wherein bearing plates are installed at the upper end of the supporting base, the bearing plates are attached to a top plate, and a first motor is placed on the top plate; and meanwhile, the first motor is connected with a first rotating shaft, the first sliding block is installed on the first rotating shaft, the first sliding block is attached to the top plate, and the first rotating shaft is installed on the top plate. According to the diameter-adjustable efficient punching device suitable for the furniture plate, the left end and the right end of the plate are fixed through first positioning plates, and then the plate is fixed up and down through an attaching rolling rod, so that subsequent punching on the plate is facilitated; and the position of a punching rod is changed through a second electric telescopic rod, so that punching of plates with different diameters is achieved through the moving range of the punching rod, and more convenience and quickness are achieved.

The invention relates to technological equipment for turning spherical inside side surface and spherical outside surface with major diameters mutually matched on a common lathe. The technological equipment comprises a guide plate with an arc-shaped groove, a tool apron rod and a tool apron; the tool apron rod is fixed on the tool apron, the tool apron is fixed on a tool rack of the lathe, the guide plate with the arc-shaped groove is fixed on the lathe bed guide rail in front of a middle planker, the lower end of the tool apron rod is inserted in a tool apron rod sleeve in the arc-shaped groove. The radius of the radius is equal to the corresponding spherical radius of workpiece, and the width of the arc-shaped groove is in dynamic match with the external diameter of the tool apron rod sleeve. The invention can conveniently turn out spherical inside side surface and spherical outside surface having match requirement on with major diameters, moreover, the change of the diameter of the spherical surfaces to be turned is also convenient, only requiring replacing corresponding guide plate, thus the working efficiency is greatly improved.

The invention relates to a top roller carrying and loading arm (1) with guides (4, 5, 6) for receiving upper rollers (7, 8, 9) at a stretching unit. Fixture devices (4, 5, 6) are provided which are assigned with an elastic pressure springs (11, 12, 13) for loading the appropriate upper rollers, wherein the pressure springs (11, 12, 13) are constructed to plastic forming members.

The invention provides a conveying and paper-pressing device used for variable-diameter printing equipment, and relates to the technique field of printing. The device includes a conveying platform, the two sides of the conveying platform are rotationally connected with output shafts, the outer sides of the output shafts are fixedly connected with motors, the middles of the output shafts are fixedly connected with electric-magnetic devices, and the outer sides of the output shafts are provided with limiting grooves. According to the conveying and paper-pressing device used for the variable-diameter printing equipment, the limiting grooves and idler wheels cooperate in use, when the paper-pressing device is used, the output shafts are driven through the motors to rotate, the limiting groovesalso rotate, the positions of the idler wheels are changed, moving blocks are thus driven to stretch out and draw back, the maximum outer diameters of compression rollers are thus changed, the distance between the outer side of each compression roller to the conveying platform is changed, the moving blocks can support rubber rings to make the surface friction coefficients increase, the diametersof the compression rollers are thus changed, paperboards different in thickness are effectively and tightly pressed, the conveying efficiency is improved, and the steady operation of the conveying device is guaranteed.