147 results about "Square cross section" patented technology

The invention relates to a preparation method of a low-cost TC21 titanium alloy large-specification bar, which comprises the following steps: 1) carrying out two-heating cogging forging on a TC21 titanium alloy ingot: carrying out beta single-phase region high-temperature forging at the first heating to obtain an intermediate billet ingot with a square cross section; in the second heating number, low-temperature upsetting and reversing drawing-out forging are carried out, then high-temperature forging is carried out, and an intermediate billet cast ingot with the square section and the grain size being 1-2 mm is obtained; (2) three-heating-number bar forging is carried out, specifically, in the first heating number to the second heating number, the intermediate blank cast ingot is upset and then drawn out and forged into a blank with the octagonal section in each heating number, and in the third heating number, the intermediate blank is drawn out into an intermediate blank with the twelve-square section; and (3) forming and forging for one heating number, wherein the middle blank with the twelve-square section is milled into a rod blank with the round section and the required size. By means of the method, the uniformity of the bar structure is improved, and the TC21 titanium alloy large-specification bar with the structure and performance meeting the requirements of phi 350 mm can be prepared at low cost.

A handle assembly for a lock mechanism, comprising a door lock body 10 and a handle 20, wherein handle is provided with a control button 22, the control button is connected to a control ejector pin 23

The utility model relates to the technical field of manufacturing of ro-ro passenger ships, in particular to a cutting platform for a composite handrail of a ro-ro passenger ship, which is provided with a base and is characterized in that the base is a strip-shaped steel tube with a square section, a strip-shaped sliding hole is arranged above the base, and the strip-shaped sliding hole is communicated with the base. Two fixed cutting seats and a sliding supporting seat are arranged on the base above the strip-shaped sliding hole, the two fixed cutting seats are fixed on the base, a cutter is fixed on the side surface of the base between the two fixed cutting seats, and the sliding supporting seat is in sliding connection with the strip-shaped sliding hole; the handrail is driven by the sliding supporting base to move to the distance needing to be cut and then stops, the cutter conducts cutting, and the handrail cutting device has the advantages of being simple in structure, stable in handrail placement, good in cutting effect, high in cutting efficiency and the like.

A Zn—Al—Mg-based hot-dip plated steel sheet includes a hot-dip plated layer formed on a surface of a steel sheet, in which the hot-dip plated layer contains, as an average composition, Al: 5 to 22 mass % and Mg: 1.0 to 10 mass %, with a remainder including Zn and impurities, and in a case where a 5 mm square cross section parallel to a surface of the hot-dip plated layer is exposed at any position of a 3t / 4 position, a t / 2 position, and a t / 4 position from the surface with a thickness of the hot-dip plated layer represented by t, a ratio (B / A (%)) of an area fraction B of a [Zn phase] to a total area fraction A of a [Zn phase] and an [Al / MgZn2 / Zn ternary eutectic structure] of a plating microstructure in at least one cross section is 20% or more.

The invention belongs to the technical field of power transmission, and relates to an anti-icing micro-nano gradient modified high-voltage wire and a preparation method thereof. The power transmission line comprises a power transmission line and a nano-scale modification layer wrapping the surface of the power transmission line, and the power transmission line is formed by twisting a plurality of metal monofilaments with micron-scale structures on the surfaces; the metal monofilament has a circular cross section, a square cross section or a special-shaped cross section; the preparation method of the metal monofilament surface micron size structure comprises the steps of sand blasting, anodic oxidation or wiredrawing nanoimprint; the micron-sized structure comprises a frame and micropores enclosed by the frame, the micropores are inverted pyramid-shaped, honeycomb-shaped, inverted cone-shaped or triangular pyramid-shaped, the range of an included angle between the frame and the metal monofilament is 110-130 degrees, the ratio of the surface area of the micropores to the total surface area of the metal monofilament is greater than 90%, and the length and the width of the micropores are between 5-800 microns. The maintenance frequency can be reduced, the microstructure is protected, the service life of the microstructure is prolonged, and meanwhile the super-hydrophobic, super-oleophobic, anti-ice, anti-freezing rain, anti-rime and anti-dirt-accumulation functions are achieved.

The ant nest comprises a plurality of ant nest assemblies with the side faces tightly attached, each ant nest assembly comprises an ant nest body and a water box, and a transparent cover plate and a bottom plate are installed at the upper end and the lower end of each ant nest body respectively. A layer plate is horizontally arranged in the middle of the ant nest body and divides the ant nest body into an upper breeding area and a lower water storage area. The water box is arranged in the lower water storage area; the four corners of the outer side of the ant nest body are each provided with an installation notch with the square cross section, and two threaded holes which are distributed up and down and formed in the length direction of the side plate on the corresponding side are formed in each installation notch. A nest body connecting piece is mounted in each mounting notch through a positioning bolt, the nest body connecting piece is rectangular or rounded rectangular, the length of the nest body connecting piece corresponds to the height of the mounting notch, the ratio of the length to the width of the nest body connecting piece is 2: 1, and the outer side face of the nest body connecting piece is flush with the outer side face of the nest body on the corresponding side or is arranged in the mounting notch.

The utility model relates to the technical field of bicycle structures, in particular to a structure-enhanced magnesium alloy hub which comprises a hub body, a connected rib and a bearing seat, the bearing seat is arranged in the center of the interior of the hub body, and the hub body is connected with the bearing seat through the connected rib; the cross sections of the connected ribs are rectangular, and the plurality of connected ribs are wound at intervals by taking the bearing seat as the circle center; a mounting ring is arranged on the bearing seat, and a reinforcing ring is arranged on the reinforcing ring. According to the hub, the connecting ribs with the rectangular cross sections are used as the connecting pieces between the hub body and the bearing seat to replace original spokes, so that the tensile strength and the stability between the hub body and the bearing seat are improved, the safety of the hub is enhanced, the reinforcing ring for reinforcing the bearing rotating shaft is arranged on the bearing seat, and the service life of the hub is prolonged. And the bearing is more stably mounted, so that the connection stability between the bearing and the axle is improved when the bicycle is ridden on a bumpy road surface.

The invention discloses a collapsible loess drilling type hydraulic parameter in-situ monitoring device, and relates to the technical field of water level monitoring, the collapsible loess drilling type hydraulic parameter in-situ monitoring device comprises a controller, a water level monitor and a water stand column with a square cross section, one end of the water stand column is fixedly sleeved with a hollow cylinder, and the bottom of the hollow cylinder is fixedly provided with an annular first electromagnet; the outer side of the water stand column is slidably sleeved with a moving ring, the moving ring is located in the hollow cylinder, an annular second electromagnet is fixed to the bottom of the moving ring, a moving rod with one end fixed to the moving ring is slidably inserted into the top of the hollow cylinder, and one end of the moving rod is fixed to the monitoring end of the water level monitor. The first electromagnet, the second electromagnet and the water level monitor are electrically connected with the controller. According to the invention, when the cement cylinder sinks or the supporting cable sinks, the position of the monitoring end of the water level monitor is difficult to change, so that the error of a monitoring value is reduced.

The utility model relates to the technical field of metal packaging shells, and discloses a ceramic sealing structure of a high-current-carrying square cross-section pin, which comprises a metal packaging shell and a square cross-section pin, a metalized frame is arranged on the side surface of the metal packaging shell, pin packaging openings are equidistantly arranged on the metalized frame, and the square cross-section pin is arranged on the metalized frame. And a ceramic insulator is packaged on the square cross section pin. According to the utility model, the ceramic insulator is packaged and installed on the square cross section pin, the ceramic insulator and the square cross section pin are sealed and connected together through the sealing installation inner ring, the anti-oxidation packaging outer ring and the sealing installation inner ring are made of kovar soldering lug materials, the bearing strength is high, and the ceramic insulator has an insulation characteristic, so that the requirements of insulation resistance and dielectric voltage resistance are met; the whole shell is made of metal materials, the packaging strength is good, durability is excellent, the device is provided with the metal packaging shell and the ceramic pin packaging structure, the packaging strength is high, the requirements of insulation resistance and dielectric voltage resistance are met, and assembling and positioning are convenient.

The utility model relates to the technical field of furniture, and provides an electromagnetic type rhythm underframe and rhythm furniture, the electromagnetic type rhythm underframe comprises a fixed frame, a movable frame and a group of electromagnetic driving mechanisms, the electromagnetic driving mechanisms are arranged, an electromagnetic coil main body is provided with a movable channel, and a transmission assembly is movably arranged in the movable channel in a penetrating mode. The two magnets extend into the moving channel from the two ends of the electromagnetic coil body respectively, and the magnetic poles of the opposite ends of the two magnets are the same. And the section of the electromagnetic coil main body is square. One electromagnetic driving mechanism is arranged, so that the rhythm bottom frame is better in consistency and higher in efficiency by taking the magnetomotive base as driving force, the problem of interference of the driving force is avoided, the rhythm bottom frame can quickly realize regular movement, and the height of furniture is reduced by arranging the electromagnetic coil main body with a square cross section; and the furniture operation stability is improved.

This article is a joint part located at the vertex of an assembled structure having a framework structure based on a regular icosahedron, and is provided with through holes for fastening wooden pieces with square cross sections with screw threads.

The utility model provides a pull disc whole-assembling structure which comprises a left side whole-assembling portion, a right side whole-assembling portion and a whole-assembling bottom, the left side whole-assembling portion and the right side whole-assembling portion are respectively clamped on two sides of the whole-assembling bottom to form a groove used for placing a pull disc, the groove is composed of a plurality of circular grooves, the plurality of circular grooves sequentially form steps, a front step is formed close to the left side whole-assembling portion, and a rear step is formed close to the right side whole-assembling portion. An inverted step is formed on the right side integral part close to the right side integral part, and each circular groove is matched with the pull disc. The stepped circular groove design is matched with a plurality of pull discs, anti-slip fall is naturally formed during stacking, one-key disassembly and assembly are achieved through the magnetic iron shaft structure, transportation and storage are facilitated, and the surfaces of the pull discs are prevented from being damaged by edges and corners due to arcing of the two ends of the rectangular section.

The utility model belongs to the technical field of cleaning machine, especially relate to the cleaning machine inner bag structure, be located in the shell of cleaning machine, including the cavity of top opening, cavity top end is equipped with the annular step position of outward extension, the bottom of step position is equipped with the installation component of downward extension, and installation component and the annular support component cooperation of shell top, the cavity has the gradually changing cross -section structure of big down small, and the upper part is square section and gradually changes into circular section downward, the cavity lateral wall below is equipped with the air inlet, and the cavity bottom forms the arc flow guide portion of downward concave, and the flow guide portion is equipped with high -level water inlet and low -level drain, when the airflow flows into the cavity from the air inlet, the cavity bottom forms the airflow channel of low resistance, and the vortex is formed to the airflow rotation movement, makes air along the inner wall spiral ascending, prolongs the airflow path, improves the drying efficiency to the inner bag and the article in the cavity. The gradually changing cross -section structure design of big down small, reduces stress concentration, promotes the overall strength of inner bag structure, strengthens the compression resistance.

The invention discloses a preparation method of a high-positioning-precision array stacked chalcogenide optical fiber image-transmitting bundle. The preparation method comprises the following steps: preparing an optical fiber preform with a square cross section, preparing a multifilament preform, preparing a first-stage optical fiber multifilament and a second-stage optical fiber multifilament, and preparing the optical fiber image-transmitting bundle. According to the preparation method, through a pre-compensation hot extrusion process, the shape rule of the square-section optical fiber monofilament is effectively ensured, and the regularity and stability of array arrangement are remarkably improved; a secondary optical fiber multifilament structure is introduced, monofilament accumulative errors are limited in a local range, the two ends of the secondary optical fiber multifilament are shaped in the vacuum heat treatment process through a mold with a limiting function, the sizes of the end faces of the secondary optical fiber multifilament are made to be consistent, and transmission and amplification of the errors in the follow-up bundling process are effectively restrained. Based on the process, the prepared array stacking chalcogenide optical fiber image-transmitting bundle has the comprehensive advantages of high resolution (small wire diameter), large number of pixels and high monofilament positioning precision.

This product is a washer used to support a sheathing board by attaching it to the threaded rod (bolt) of a concrete formwork fastener and tightening it with a nut, for example, as shown in the reference diagram showing the state of use, thereby pressing a square cross-section thick-end material such as a square pipe against a shallow beam.

The utility model relates to the technical field of large power transformer oil tank and structural part machining, in particular to a cylinder axis space tilting transformer ascending flanged base tool which comprises a base flange, a structural pipe, a first positioning plate, a second positioning plate and a pipe joint. The first positioning plate and the second positioning plate are both arranged above the base flange, and the pipe joint is arranged on one side of the structural pipe; a traditional working cylinder is replaced by the structural pipe, manufacturing is simpler, materials are saved, meanwhile, a traditional square flange can be replaced by the base flange, the size is smaller, the structural pipe can be conveniently matched with the first positioning plate and the second positioning plate to be accurately positioned due to the arrangement of the square section of the structural pipe, and the working efficiency is improved. The center line direction of the structural pipe is parallel to the axis of the ascending flanged base barrel, meanwhile, assembling of a traditional designed tool pipe joint and a cylinder arc face can be avoided, and the pipe joint can be conveniently and accurately positioned on the side wall of the structural pipe.

The invention relates to the technical field of material mechanical parameter testing, and discloses a Young modulus calculation method of a square section rod, which comprises the following steps: acquiring section side length, length and mass information of a sample by using a high-precision measuring tool; acquiring time domain sound pressure signals under two supporting states by using a professional microphone; converting a time domain sound pressure signal into a frequency domain signal, and respectively identifying a second-order damping bending vibration frequency and a third-order damping bending vibration frequency on a spectrogram; the damping influence is ignored; calculating h / l to obtain a corresponding coefficient; substituting all parameters into a formula to obtain a Young modulus value; and calculating the average Young modulus. According to the method, the universality of the calculation method for the square section rod in different practical application scenes is enhanced, and the Young modulus can be accurately calculated as long as corresponding parameters are obtained and substituted no matter how the size of the sample changes.

The invention belongs to the technical field of robots, and particularly relates to a miniature amphibious piezoelectric robot based on a hollow stepped beam structure, which comprises an actuating component, the actuating component comprises an actuating cabin, and a hollow stepped beam is fixedly connected in the cabin of the actuating cabin. Piezoelectric ceramic pieces are pasted to the centers of the upper face, the lower face, the left face and the right face of the two square-section beam sections of the hollow stepped beam respectively, and the polarization direction of the piezoelectric ceramic pieces on the lower face and the right face of the square-section beam section I and the polarization direction of the piezoelectric ceramic pieces on the upper face and the left face of the square-section beam section II are perpendicular to the surface of the hollow stepped beam outwards. The polarization directions of the piezoelectric ceramic pieces on the other surfaces of the two square-section beam sections are vertical to the surface of the hollow stepped beam and are inward; a threaded rod is arranged in a through hole of the hollow stepped beam, propellers are connected to the two ends of the threaded rod respectively, and passive feet are fixedly connected to the two sides of the cabin; according to the robot, the structure of the robot is effectively simplified, the overall size of the robot is reduced, and the operation efficiency is improved.

The utility model relates to a temperature-uniformity-enhanced slide glass device and probe station equipment. The temperature-uniformity-enhanced slide glass device comprises a slide glass disc and a cooling disc, the slide glass disc is provided with a bearing surface, and the slide glass disc is used for bearing a wafer through the bearing surface; the cooling disc is provided with a cooling flow channel, and the cooling disc is used for cooling the slide glass disc through the cooling flow channel; and turbulent flow blocks are arranged in the cooling flow channels. According to the technical scheme, the cooling medium impacts the turbulent flow block when flowing in the cooling flow channel, so that the flowing of the cooling medium in the cooling flow channel can be disturbed, the phenomenon that some cooling medium is still in the cooling flow channel is avoided, the temperature uniformity of the cooling medium can be improved, and the service life of the cooling medium is prolonged. The temperature uniformity of the wafer loading disc in a low-temperature test is improved, the cooling effect is improved, the test effect is ensured, and the thin wafer is protected. Besides, the cooling flow channel can have a square cross section, so that the cooling flow channel has a larger sectional area, more cooling liquid can pass through the cooling flow channel, the contact area between the slide glass disc and the cooling medium can be effectively increased, and the cooling effect is improved.

The utility model discloses a modular assembly type reinforced concrete bulletproof layer which comprises a bottom plate, a plurality of bulletproof units with square cross sections are arranged on the bottom plate, the bulletproof units are spliced to form a bulletproof layer, and the bulletproof layer is formed by splicing a plurality of bulletproof layers. Each bulletproof unit comprises four strip-shaped reinforced concrete modules with the same size and a square reinforced concrete module, and the square reinforced concrete module is embedded in a middle gap formed by the four strip-shaped reinforced concrete modules which are in butt joint end to end in sequence; longitudinal steel screws are arranged on the strip-shaped reinforced concrete modules and the square reinforced concrete modules and penetrate through all the bulletproof layers. The strip-shaped reinforced concrete modules and the square reinforced concrete modules on the adjacent bulletproof layers are opposite in trend and staggered. The steel screws can penetrate through the multiple layers of concrete modules, on one hand, the assembly function is achieved, and on the other hand, the overall shear strength is provided. And the modular assembly type bulletproof layer is adopted, so that the energy consumption mechanism is rich.

The invention discloses a steel reinforced concrete column connecting structure and a construction method thereof, and relates to the technical field of constructional engineering, the steel reinforced concrete column connecting structure comprises an upper layer steel reinforced concrete column, a lower layer steel reinforced concrete column and a transition section steel reinforced concrete column, and the section shapes of the upper layer steel reinforced concrete column and the lower layer steel reinforced concrete column are long rectangles and squares respectively; the upper-layer steel reinforced concrete columns and the lower-layer steel reinforced concrete columns are staggered in the vertical direction; the transition section steel reinforced concrete column comprises a lower section and an upper section which are connected, the lower section is connected with the lower-layer steel reinforced concrete column, and the upper section is connected with the upper-layer steel reinforced concrete column. The upper section is of a uniform-section hexahedron structure formed by stretching a long rectangular section S2, the lower section is of a hexahedron structure formed by gradually stretching a square section S1 to the long rectangular section S2, the square section S1 and the long rectangular section S2 are parallel to each other, and the length-width ratio is continuously transited from 1: 1 to n: 1, ngt; 1, the problem of eccentric transition of the upper and lower layers of columns is solved, so that the structure can keep good connection performance in an eccentric state;

This machine for loading nuclear fuel assemblies (3) into a reactor vessel (1) of a nuclear reactor comprises a horizontally mobile trolley (5) to which a telescopic vertical mast (4) is attached. The mast includes a fixed drum (7) attached to the trolley and several vertically mobile drums (8-11) mounted coaxially with the fixed drum, allowing for telescopic extension. The innermost drum (11) is equipped with a grapple (12) for connecting to the upper end of a fuel assembly. The drums have a square cross-section. The drums are fitted with stops that cooperate to allow for individual deployment of the drums and their retraction by raising the innermost drum.Each drum, with the exception of the innermost drum, is equipped on its four lateral walls with pads designed to facilitate the deployment and retraction of the drums within one another. See Figure 1 for abbreviations.

The ant nest comprises a plurality of ant nest assemblies with the side faces tightly attached, each ant nest assembly comprises an ant nest body and a water box, and the upper end and the lower end of each ant nest body are each provided with a transparent cover plate and a bottom plate; a layer plate is horizontally arranged in the middle of the ant nest body and divides the ant nest body into an upper breeding area and a lower water storage area. The water box is arranged in the lower water storage area; the four corners of the outer side of the ant nest body are each provided with an installation notch with the square cross section, and two threaded holes which are distributed up and down and formed in the length direction of the side plate on the corresponding side are formed in each installation notch. A nest body connecting piece is mounted in each mounting notch through a positioning bolt, the nest body connecting piece is rectangular or rounded rectangular, the length of the nest body connecting piece corresponds to the height of the mounting notch, the ratio of the length to the width of the nest body connecting piece is 2: 1, and the outer side face of the nest body connecting piece is flush with the outer side face of the nest body on the corresponding side or is arranged in the mounting notch.

This invention discloses a beam formwork installation and reinforcement device for confined spaces, comprising a disc-lock frame. An aluminum alloy beam bottom horizontal plate is mounted on top of the disc-lock frame, and a beam bottom support formwork is installed above it. A first timber beam is installed between the two. The inner side of the formwork is a concrete beam with integrated columns. Irregularly shaped metal rods with steel plates and clearance grooves are installed on the outer sides of the formwork on both sides of the columns. These irregularly shaped metal rods are connected by a connecting assembly. A second timber beam is installed between the two columns, with both ends contacting small channel steel. L-shaped fixing clips are fixed to the small channel steel. The connecting assembly replaces the original first nut with an end assembly, which includes a magnetic end plate, a square-section threaded sleeve, and a limiting nut. This invention adapts to confined space layouts through a modular aluminum alloy beam bottom horizontal plate and achieves precise reinforcement of the beam formwork while being suitable for operation in confined spaces using irregularly shaped metal rods with clearance grooves and a connecting assembly containing end assemblies.

A multi-use exercise equipment anchor system adapted for removably mounting in a tubular receptacle disposed in line with a vehicle's chassis or frame. The tubular receptacle may be disposed along the chassis' center line or offset parallel to the chassis' center line. The equipment anchor may comprise a tubular comprising a first end portion angularly joined to a second end portion. The first end portion being at least partially inserted into the tubular receptacle and the second end portion extending from the receptacle and diagonally descending away from the receptacle to a point adjacent the surface on which the vehicle resides. The second end portion may comprise openings and other means for attaching exercise equipment such as elastic bands, a battle rope, or a landmine to the equipment anchor. The anchor may comprise a tubular comprising a square cross section, a rectangular cross section, or a circular cross section.

The present invention relates to a forging method and forming die for ultra-large diameter thin-walled arc forgings with bosses, and the method comprises the following steps: (1) a square billet making stage; (2) a square billet transformation into a triangular billet stage; (3) a trapezoidal billet forming stage; and (4) a final forming stage. The advantages are as follows: the present invention solves the difficult problem of forging and forming ultra-large diameter thin-walled arc forgings with bosses, and designs a corresponding forming die. By making square section billets, chamfering, making triangular section billets, pressing trapezoidal section billets, and pressing two isosceles corners of the trapezoid in the final forming stage, the difference in forging rheology between the upper and lower sides of the trapezoidal section billet is used to achieve the bending of the long strip, and finally the desired thin-walled arc forging is formed. The method can obtain a forging with a continuous overall forging texture while ensuring the shape and size of the forging through a series of simple free forging operations, thereby significantly improving the product quality.

This utility model relates to a suspension coil spring coating fixture, belonging to the technical field of coating fixtures. It includes a main hanging rod, with multiple part hook assemblies detachably connected to both sides of the main hanging rod. These part hook assemblies are used to suspend the suspension coil springs. Each part hook assembly includes a V-shaped hook and a connecting block, which are fixedly connected. The V-shaped hook has a V-shaped body and a square cross-section. During suspension, the edges of the square cross-section contact the spring, reducing the contact area between the fixture and the spring, thereby minimizing the impact of the hooking point on the powder coating process. This suspension coil spring coating fixture, by setting multiple part hook assemblies on the main hanging rod, increases the number of springs that can be suspended, thus improving the powder coating efficiency of the coating production line. Simultaneously, by setting the V-shaped hook with a square cross-section, the contact area between the fixture and the spring is reduced, thereby minimizing the impact of the hooking point on the powder coating process.