81 results about "Hypotenuse" patented technology

The embodiment of the invention provides a chip layout image processing method and device, electronic equipment and a storage medium, and the method comprises the steps: determining a basic structure type corresponding to a target graph according to the line segment position information in an obtained chip layout image; and determining a refined structure type corresponding to the target graph according to the line segment position information and the line segment angle information. And performing rule inspection on the target graph based on standard structure parameters preset for the refined structure type. The defect that only a graph parallel to the transverse axis direction or the longitudinal axis direction of a two-dimensional rectangular plane coordinate system or a graph with a specific bevel edge angle can be recognized at the present stage is effectively overcome and solved, and then the inspection precision and the inspection efficiency of design rule inspection or mask rule inspection are remarkably improved. The practicability and reliability of the rule checking process and the subsequent image adjusting process for the target graph are improved to a certain extent, so that the performance and the yield of the finally produced chip are powerfully guaranteed.

A multi-purpose framer's speed square in the form of a right triangle comprising a top plate with a T-shaped edge and a series of etched top plate lines including framing top plate call outs, a notched front edge having a plurality of notches spaced along the length in ¼″ increments, ruler etching callouts, and lumber width callouts denoting lumber sizes, and a hypotenuse edge having etched top plate lines, common rafter window plumb cut outs and a hip / valley section disposed above the hypotenuse edge having etched degrees and hip / valley roof rafter plumb cuts.

The utility model discloses a sound barrier structure arranged back to a noise source, which comprises a T-shaped device body, the top end of the device body is provided with a sound absorber structure, the sound absorber structure comprises a plurality of tip sound absorbers which are arranged in sequence, each tip sound absorber is of an isosceles right triangle structure, and the tip sound absorbers are arranged at the top end of the T-shaped device body. The first right-angle side of each tip sound absorber serves as the bottom of the tip sound absorber and is connected with the top end of the T-shaped device body, the first right-angle sides and the inclined sides are arranged in the mode that the first right-angle sides and the inclined sides do not face a noise source, namely the second right-angle sides are opposite to the noise source, and the second right-angle side of each tip sound absorber serves as the height of the tip sound absorber and is right opposite to the noise source in a vertical mode. Compared with the prior art, the sound barrier structure has the highest insertion loss value within the center frequency range of 500 Hz to 1600 Hz, so that the sound wave absorption rate is highest, and the noise reduction effect is best.

The utility model discloses a packing carton with a buffer structure, which relates to the technical field of packing cartons and comprises a carton body and a bottom layer, the bottom layer comprises a buffer layer, a support layer, a foam layer, a bearing layer and a group of damping strips, a group of protective corners for keeping stability are fixedly connected in the carton body, the foam layer is mainly used for buffering and damping, and the bearing layer is used for bearing the buffer layer. The shock-absorbing cushion has good elasticity and compressibility, can quickly deform and absorb a large amount of impact energy when an article is impacted, effectively protects the article in the cushion from being collided and damaged, the honeycomb structure can absorb energy through tiny deformation of the honeycomb structure and compression of air, the buffering and shock-absorbing effects are achieved, and triangles for protecting corners have stability; compared with the prior art, the structure can be kept relatively stable and not prone to deformation when being subjected to external force, meanwhile, the bevel edges of the triangle can guide impact force to be dispersed in the specific direction, energy is absorbed through extrusion and deformation of materials, and the corner of an object is well protected.

A portable multipurpose subdivision graduation protractor comprises a main ruler, an auxiliary ruler and a precise hinge shaft unit. The main ruler is of a structure similar to a right triangle, two right-angle sides are main ruler arms, a bevel edge is replaced by a 135-degree fold line, and 45-degree, 135-degree and 90-degree external angles are provided and can be directly used as a fixed angle sample plate; the surface of the main ruler is provided with easily-identified fan-shaped distribution scales which are correspondingly arranged in two layers as difference reference lines; parallel step notches are formed in the upper edge of the vertical main ruler arm and are used for small-angle measurement; the auxiliary ruler is of a two-right-angle-side structure, the vertical side is an auxiliary ruler arm, and the auxiliary ruler can also be used as a fixed-angle sample plate. The horizontal side is a pointer arm, the end portion is of a fan-shaped structure, the radius is the same as that of the fan shape of the main ruler, and ruler reading visual errors can be reduced. Various interior angles can be widely measured and mapped, difference group scribed lines are effectively set, and an error conduction chain is shortened due to the fact that the whole ruler is not provided with redundant components. The precision machining problem is solved, and the measurement precision can be further improved.

The application relates to a multi-module bidirectional variable-configuration mechanism and belongs to the technical field of spaceflight. The mechanism comprises a first module, a second module, a first hinge group and a second hinge group, the first module and the second module are equilateral right-angled triangles, the number of the first module and the second module is four, the first module and the second module are alternately connected, the lower hypotenuse of the adjacent first module and the second module is connected through the second hinge group, and the upper right-angled side of the adjacent first module and the second module is connected through the first hinge group. Through ingenious structural design and driving layout, the mechanism solves the problems of a large number of driving quantity and a complex control system of a previous complex deformation structure, can realize configuration switching through one or two drives, is lightweight and small-sized, the adaptability is increased, and the control cost is reduced.

The utility model discloses a formwork wall installation perpendicularity measuring tool, relates to the technical field of building construction quality acceptance, and solves the problems that a perpendicularity measuring tool in the prior art is inconvenient to move and operate and low in use flexibility. A formwork wall installation perpendicularity measuring tool comprises a triangular support, the triangular support is of a right triangle structure, a graduated scale is arranged on one vertical edge of the triangular support, a supporting rod is arranged on the bevel edge of the triangular support, and a drop hammer is hung on the supporting rod. According to the tool, the structure of the supporting component is simplified, the triangular support which is simple and light in structure is arranged, taking and moving use are convenient, the calibrated scale is arranged and matched with the suspended drop hammer, whether the wall point position corresponding to the vertical edge where the calibrated scale is located deviates or not can be measured, and the inclination deviation degree can be determined. Moreover, the tool is light in structure, can achieve real-time measurement of the perpendicularity of the formwork wall in the installation process under various working conditions, and has the advantages of being accurate in measurement, easy and flexible to operate, rapid in paying off and the like.

The utility model discloses a PCB (printed circuit board) warpage measuring tool, which relates to the technical field of PCB detection, and comprises a measuring tool, the measuring tool is a right triangle plate, the included angle between the long straight edge and the bevel edge of the measuring tool is 10 degrees, the long straight edge of the measuring tool is provided with scale marks, and the bevel edge of the measuring tool is detachably provided with a support assembly. According to the utility model, the measuring tool is a right triangle with the angle of 10 degrees, the long straight edge of the measuring tool is provided with the scale marks, during measurement, the hypotenuse of the triangle is taken as the bottom, the measuring tool is inserted into the warping area, the scale of the long straight edge is read and recorded after insertion, and the warping value is obtained by multiplying the scale by sin 10 degrees, so that the measuring tool is simple and convenient to operate and does not need to be like a feeler gauge and a needle gauge; and different specifications need to be used for comparison one by one, so that the data measurement efficiency can be effectively improved.

The utility model provides a reinforcing structure of a special-shaped column template, which belongs to the technical field of concrete temperature measurement and comprises a square and round buckle which is used for being sleeved on the periphery of the special-shaped column template and is of a rectangular structure. The first side edge, the second side edge and the third side edge of the square and round buckle are parallel to the first pouring formwork, the second pouring formwork and the third pouring formwork respectively, and the fourth side edge of the square and round buckle is opposite to the fourth pouring formwork and the fifth pouring formwork at the same time. The right-angle-shaped triangular framework is arranged in the square and round buckle, the right angle of the right-angle-shaped triangular framework is opposite to the right-angle included angle between the third side edge and the fourth side edge, and the bevel edge of the right-angle-shaped triangular framework is used for being attached to the outer side of a fourth pouring formwork; the square wood is used for being arranged in a gap between the fifth pouring formwork and the square and round buckle so that force transmission between the square and round buckle and the fifth pouring formwork can be achieved. When the pouring formwork is fixed, the fixing device has the advantages of being easy to operate and high in practicability.

The invention provides a folding unmanned aerial vehicle parking apron and a use method of the unmanned aerial vehicle parking apron, and relates to unmanned aerial vehicles. The folding type unmanned aerial vehicle parking apron comprises a basket body, a box body and a telescopic supporting piece. The box body is placed on the basket body and comprises four folding assemblies, each folding assembly comprises a side plate, a first connecting plate and a second connecting plate, the side plates are square, the first connecting plates are isosceles right triangles, the right-angle sides of the first connecting plates are hinged to the third edges, and the right-angle sides of the first connecting plates are equal to the third edges in length. The second connecting plate is an isosceles right triangle, the hypotenuse of the second connecting plate is hinged to the second edge, and the hypotenuse of the second connecting plate is equal to the second edge in length; the number of the telescopic supporting pieces is multiple, one side plate is at least provided with one telescopic supporting piece, and one second connecting plate is at least provided with one telescopic supporting piece. Stable supporting and convenient storage of the unmanned aerial vehicle parking apron are achieved.

The utility model discloses a formwork supporting construction structure for a well protection wall. The formwork supporting construction structure comprises the well protection wall and a formwork supporting device, the steel formwork is tightly attached to the side edge of the well protection wall; a triangular supporting assembly is installed on the side edge, away from the well protection wall, of the steel formwork, and the inclined edge of the triangular supporting assembly can be adjusted to stably support the steel formwork. The bottom of the inclined batten is clamped into a notch formed between the abutting wood block and the horizontal batten, and a corresponding wood wedge block is installed in the notch to carry out heightening adjustment on the bottom of the inclined batten, so that the steel formwork is stably supported by the adjustable bevel edge of the triangular supporting assembly. The problem that an inclined supporting rod, an adjusting supporting rod and a fixed support rod are connected through welding or bolts and are not convenient to adjust to adaptively support a formwork is solved.

This invention belongs to the field of bridge construction surveying technology, specifically a method for measuring the verticality of bridge tower piers at close range and with large inclination angles in mountainous areas. The method includes: S1, calculating the angle between the intersection hypotenuse and the vertical line of the tower pier based on the known elevation and measured slope distance of the measuring point at the top of the tower pier, then calculating the horizontal distance and solving for the first corrected coordinates of each measuring point, thus avoiding vertical angle observation errors under large inclination angles; S2, accurately measuring the actual distance between the measuring points of the two tower piers, and using this as a constraint to adjust the first corrected coordinates to obtain a high-precision second corrected coordinate for the center of the tower top; S3, calculating the verticality based on the second corrected coordinates of the tower top and the known coordinates of the tower bottom. This invention effectively overcomes the problem of low measurement accuracy caused by close-range, large-inclination angle observations in narrow mountainous terrain, eliminates the need for multi-layered control networks, improves measurement efficiency and accuracy, and reduces operational risks and costs.

The present invention discloses a mixed flow fan module and an air handling unit using the same, comprising a motor and a mixed flow fan wheel. The motor drives the mixed flow fan wheel to rotate. The mixed flow fan wheel comprises a cover plate, a bottom plate and a plurality of blades. The blades are surrounded by a blade inlet edge, a blade outlet edge, a blade top and a blade root. The projection of the spatial modeling curve of the blade inlet edge on the axial plane is composed of two arcs, namely, arc AB and arc BC. The chord AB of arc AB is the hypotenuse of the right triangle ADB; the chord BC of arc BC is the hypotenuse of the right triangle BEC, and a rectangle ODBE is formed. The radii of arc AB and arc BC are R respectively. AB 、R BC ; The proportion relationship meets the following requirements: 0.33≤AO:CO≤3; 0.25≤DO:EO≤4; 1≤R AB :AO≤4;1≤R BC :DO≤4; It greatly optimizes the state of the blade air inlet flow field, thereby reducing the airflow impact loss at the blade inlet, thereby achieving the effect of improving the wind wheel efficiency.

The utility model discloses a guide space ring device for a post-shearing roller way of a bar, which comprises the post-shearing roller way and a plurality of guide space rings, the plurality of guide space rings are sleeved and fixedly arranged on the post-shearing roller way, the cross section of each guide space ring is a right triangle, and two sides of the hypotenuse of each right triangle are chamfered. Guide space rings at the two ends of the roller bed are designed on the roller surface of the flat roller of the post-shearing roller bed, are made of materials with higher wear resistance and are welded at the two ends of the flat roller of the post-shearing roller bed; the novel guide space ring device has the advantages of being simple in structure, low in manufacturing cost, convenient and fast to maintain and the like, and the field use requirement can be well met.

The utility model discloses a self-powered comprehensive platform capable of being butted on the sea, which comprises a truss, a floating body and a deck, a first butting part is arranged at the edge of at least one side of the deck, and a second butting part is arranged at the edge of at least one side of the deck; the first butt joint parts are a plurality of trapezoidal bulges horizontally extending outwards, the top edges of the trapezoids are close to the inner side, and the bottom edges are close to the outer side; the second butt joint part is a plurality of rectangular grooves which are horizontally recessed inwards, wedge-shaped movable plates capable of horizontally stretching out and drawing back are installed on the two sides of each groove respectively, and the slope of the bevel edge of each movable plate is equal to that of the bevel edge of the first butt joint part. Through the arrangement of the first butt joint part and the second butt joint part, the butt joint difficulty of the offshore comprehensive platform is reduced, the modular design of the offshore comprehensive platform is facilitated, and the design and manufacturing difficulty and cost are reduced while the comprehensive requirements are met.

The present invention provides a flow control method based on a curved fish-scale bionic structure, comprising the following steps: S1. constructing the main structure of an impeller blade, including a suction surface e and a pressure surface f, each of which is provided with a fish-scale region g having a plurality of regularly arranged fish-scale bionic structure coupling elements; S2. constructing and designing a single fish-scale bionic structure coupling element, including a bottom surface conforming to the blade surface and a top surface in a fish-scale structure, the top surface including a sector-shaped surface whose vertex coincides with the midpoint of one side of the bottom surface, and two triangular oblique surfaces with the hypotenuse of the sector surface as the hypotenuse, establishing a spatial rectangular coordinate system with the vertex of the sector as the origin, and constructing the fish-scale bionic structure coupling element in the spatial rectangular coordinate system; S3. establishing a regular arrangement of the plurality of fish-scale bionic structures. Based on the control of flow by the bionic structure, the present invention can improve the flow characteristics of fluid on the blade surface and reduce noise during the operation of a vane pump.

The utility model relates to the technical field of measuring tools, in particular to a metal set square ruler structure, which comprises an integrally formed triangular metal substrate, and is characterized in that the triangular metal substrate is integrally of an isosceles triangle structure and is provided with a first right-angle side, a second right-angle side and an inclined side, the first right-angle side, the second right-angle side and the bevel edge are all provided with continuous length scales, according to the metal set square ruler structure, the integrally-formed 6061 aluminum alloy base plate is combined with hard anodic oxidation treatment, the abrasion resistance and the structural strength are remarkably improved, and it is ensured that deformation is avoided after long-term use; metric / English dual-system scales are arranged on the three edges, different measurement requirements are met, oblique dimensions can be directly measured through the bevel edge scales, and the drawing flexibility is improved; a center hollow light-weight groove reduces the weight, meanwhile, three measurement channels extend, two of the three measurement channels are parallel to the right-angle side so that parallel lines can be drawn conveniently or positioning can be assisted, and the third channel provides oblique measurement support.

The caliber-adjustable electromagnetic flowmeter comprises a shell, four moving modules and a pushing part, the shell is used for containing the moving modules and the pushing part, the section of each moving module is an isosceles right triangle, the number of the moving modules is four, the four moving modules are arranged in an annular array, and the pushing part is arranged on the shell. A closed square hole channel is defined by the four moving modules, the right-angle sides of the four moving modules are opposite in pairs in the vertical direction and the horizontal direction respectively, and the adjacent side faces of the right-angle sides of the cross sections of the four moving modules are attached to the other adjacent side faces of the right-angle sides of the cross sections of the adjacent moving modules. The four moving modules are connected with the shell in a sliding mode in the length direction of the bevel edges of the cross sections of the moving modules, and the two ends of the four moving modules are attached to the inner walls of the two ends of the shell. Due to the adoption of the technical scheme, when the electromagnetic flowmeter with the adjustable caliber is used for monitoring a rainwater pipe, the electromagnetic flowmeter can measure more accurately to a certain extent.

A tensioning roller support frame includes a main vertical plate, a left end plate, a right end plate, an upper panel, a lower panel, two triangular plates, a cover plate, a transverse rib plate, and a vertical rib plate. The left side of the main vertical plate is welded to the left end plate, the right side of the main vertical plate is welded to the right end plate, the upper end of the main vertical plate is welded to the upper panel, and the lower end of the main vertical plate is welded to the lower panel. One right-angled side of the triangular plate is welded to the lower panel, and the other right-angled side of the triangular plate is welded to the left end plate or the right end plate. The hypotenuse of the triangular plate is welded to the cover plate. The transverse rib plate and the vertical rib plate are welded to the inner and outer side surfaces of the main vertical plate. The main vertical plate includes a first steel plate, a second steel plate, a third steel plate, and a fourth steel plate. The lower end of the first steel plate is welded to the upper end of the second steel plate, the right end of the second steel plate is welded to the left end of the third steel plate, the upper end of the third steel plate is welded to the lower end of the fourth steel plate, and the lower end of the fourth steel plate is engaged in a groove. The present invention also provides a method for preparing a tensioning roller support frame.

The utility model discloses an inclined guide rail leveling device and belongs to the technical field of mechanical cold machining. The main body structure of the body is a cuboid, one long side of the body is a right-angle side A, and two short sides of the body are a right-angle side B and a right-angle side C respectively; an inclined rectangular notch is formed in the other long edge of the body, and a concave arc is arranged at the intersection of the bevel edge A and the bevel edge B of the rectangular notch. The device provided by the utility model has the advantages of strong versatility, capability of measuring at the same inclination angle, strong mobility, capability of measuring any position on the guide rail, capability of comprehensively measuring the levelness of the guide rail, capability of completely fitting a working surface with a working surface of the guide rail during measurement, capability of completely depending on the manufacturing precision of the device, and small measurement error.

The present invention is a novel tool formwork for cast-in-place sloping roof construction, comprising a support frame in the shape of an equilateral triangle, wherein wooden squares are fixed at intervals on the left and right hypotenuses of the support frame along the hypotenuse direction, a left integrated U-shaped formwork is fixed on the top of the wooden square at the lower left side, and a right integrated U-shaped formwork is fixed on the top of the wooden square at the lower right side, the bottom end portion of the left integrated U-shaped formwork is fixed to the left bottom formwork, and the top end portion is fixed to the left top formwork, the left bottom formwork is fixed to the left wooden square, the bottom end portion of the right integrated U-shaped formwork is fixed to the right bottom formwork, and the top end portion is fixed to the right top formwork, and the right bottom formwork is fixed to the right wooden square, a pouring port and an air outlet are provided between the left top formwork and the right top formwork, left inner supports are arranged at intervals along the hypotenuse direction in a cavity formed by the left integrated U-shaped formwork, the left bottom formwork and the left top formwork, and right inner supports are arranged at intervals along the hypotenuse direction in a cavity formed by the right integrated U-shaped formwork, the right bottom formwork and the right top formwork.

The utility model discloses an implantation needle with a novel needle tip structure, which comprises an implantation needle body, the implantation needle body comprises a receiving part and a needle tip part, the needle tip part is arranged at one end of the receiving part, the needle tip part comprises a plane, bevel edges, a cambered surface and edge points, the plane, the bevel edges and the cambered surface are intersected on the edge points, and the plane and the cambered surface are intersected on the two bevel edges; the plane is an isosceles triangle, the bevel edges are two edges of the isosceles triangle, and the edge point is one vertex of the isosceles triangle; a round corner is arranged at the position where the needle body intersects with the bent part. A first inclined surface is arranged at one end of the bending part; according to the utility model, the needle tip part is designed into the arc surface and the plane which share the same edge point, so that the transition is smoother, the needle tip part can more smoothly penetrate when entering human tissues due to the design of the arc surface, and the cutting and tearing of surrounding tissues are reduced, so that the pain of a patient is reduced, and the treatment experience of the patient is improved.

The present invention discloses a blind search method for the hypotenuse of a right triangle in aerospace shaft-hole assembly. The rough positioning position is determined by visual information, and a search coordinate system, a robotic arm base coordinate system and an end tool coordinate system are established. The robotic arm is compliantly controlled to move to the rough positioning position, and a blind search is performed until a collision occurs, and the collision point is recorded. The robotic arm performs a light-touch movement in all four directions, and obtains the collision force in real time, and determines the position of the collision point by the change in force. Then, a corresponding blind search shaft-hole alignment strategy is set to achieve alignment of the outer circle contours of the shaft and hole plug-in, and compliant docking of the shaft and hole. The present invention realizes an efficient blind search capability for high-precision shaft-hole assembly for aerospace, has high search accuracy, especially considering the side collision phenomenon, and has good engineering applicability and universality. It is easy to implement and has high accuracy. It can be widely used in the field of on-orbit assembly of aerospace shaft holes, and greatly improves the accuracy and efficiency of shaft hole alignment during on-orbit assembly of shaft holes.

The utility model relates to the technical field of railway vehicle doors, in particular to a snow blocking structure of a railway vehicle built-in door, which comprises a carriage, a door frame arranged on the carriage, and a passenger room left door and a passenger room right door which are arranged on the door frame, the guide plate is vertically arranged on the inclined surface of the door frame, the guide plate is of a triangular structure with an arc-shaped bevel edge, the arc surface of the guide plate faces the outside of the carriage, and the guide plate is of a hollow structure. The flow guide plate is added to guide wind and snow, so that the wind and the snow are effectively prevented from entering a door slot of a railway vehicle door.

The application discloses a silk screen tension auxiliary measurement assembly, which comprises a first regulating plate and a second regulating plate which are substantially in the shape of a sheet, the first regulating plate is in the shape of an isosceles right triangle, a first handle is arranged on the first regulating plate, a clamping groove for placing a tension meter is formed in the hypotenuse of the first regulating plate, and the clamping groove is arranged at the midpoint of the hypotenuse of the first regulating plate; the second regulating plate is substantially in the shape of a rectangle, a second handle is arranged on the second regulating plate, and a first through hole for placing the tension meter is formed in the second regulating plate. The silk screen tension auxiliary measurement assembly can assist the tension meter in measuring the tension of silk screens of different specifications at fixed points, the tension meter is accurately and reliably positioned, the measurement error is small, the silk screen tension auxiliary measurement assembly is convenient to use, and the printing quality is high.

This application discloses a robot base station and a robot system. The robot base station includes a charging station and a first coil connected to the charging station. The charging station and the first coil form a right-angled triangle structure. The first coil includes a first connecting segment, a second connecting segment, and a third connecting segment arranged sequentially. The first and second connecting segments are the legs of the right-angled triangle structure, and the third connecting segment is the hypotenuse of the right-angled triangle structure. The length of the first connecting segment is greater than that of the second connecting segment. The charging station is located on the first connecting segment, and the first connecting segment is at least partially the path for the robot to return to the charging station. Thus, the first coil and the charging station form a right-angled triangle structure. When the robot returns to the charging station along the first connecting segment, the magnetic field generated by the first coil guides the robot back to the charging station for autonomous recharging. During this process, the difference in magnetic field strength detected on the left and right sides of the robot can remain constant, allowing the robot to dock with the charging port of the charging station with maximum efficiency and precision.

The present invention relates to a system and process for erecting a closure section of a high-speed continuous beam, which comprises a driving part and a supporting part arranged on a pier; the supporting part is used to bear the middle part O of the lower end of a rotating beam; the driving part has one end hinged to the rotating beam through a hinged seat and the other end is hinged to the pier at C, and is used to drive the rotating beam to rotate from a starting position at point A to a closing position at point B; points A, B, and O form a right triangle, point O is at a right angle, and a line connecting points A and B is a hypotenuse; the present invention has a reasonable design, a compact structure, and is easy to use.

The invention discloses a method and device for calculating the maximum output voltage of a two-level voltage type frequency converter, and the method comprises the steps: forming an equilateral triangle according to the straight lines where two basic voltage vectors are located and the vertexes in a sector where a space electrical angle is located, calculating the length of a vertical line perpendicular to the third side of the equilateral triangle from the central point of the space voltage vector distribution diagram; mapping the difference between the working durations of the two basic voltage vectors to the third edge; taking the vertical line as a right-angle side, taking the difference between the working durations of the two basic voltage vectors on the third side as the other right-angle side, calculating the lengths of bevel edges corresponding to the two right-angle sides by adopting a preset optimal gradient method, and taking the lengths of the bevel edges as the maximum output voltage of the frequency converter; according to the optimal gradient method, the hypotenuse of the triangle is calculated by using two right-angle sides through a dichotomy and an error feedback updating mode. The maximum output voltage of the two-level voltage type frequency converter can be quickly and accurately calculated, and the calculation efficiency is improved.

The present invention discloses a ceramic sealing device for a rotary engine, comprising a first ceramic sealing plate, a second ceramic sealing plate and a plurality of sealing springs; the first ceramic sealing plate and the second ceramic sealing plate are both rectangular and have the same structure, the first ceramic sealing plate comprises a ceramic plate and a movable plate, the ceramic plate is a right-angled trapezoid, the bottom of the ceramic plate is one length of the first ceramic sealing plate, and the movable plate is a right-angled triangle; in the installed state: the hypotenuse of the ceramic plate and the movable plate slides in contact, and the other length of the first ceramic sealing plate is sequentially spaced along the direction of the movable plate to form a spring abutment position; the second ceramic sealing plate rotates 180° along the direction of its length and then slides and fits against the first ceramic sealing plate, and a plurality of sealing springs abut against the spring installation position. The structure of the present invention is convenient and compact, and the design is reasonable. It can improve the sealing effect to a certain extent and increase the life of the sealed component, and has good practical significance.

To provide a fan with a ring-shaped handle, which allows the user to appreciate the content printed on the surface of the fan after use and does not require much time before use. [Solution] The ring-shaped handle fan 1 has a handle M made from resin in the shape of an isosceles triangle with a base of approximately 30 mm and a hypotenuse of 40 mm swept out by about 15 mm, and is structured so that the fan can stand on its own when the bottom of the handle base is in horizontal contact with the ground.