1322 results about "Isosceles trapezoid" patented technology

A stand for a fire extinguisher comprises four identical panels and a square plate. Each panel has a rectangular portion and an isosceles trapezoid-shaped portion. The isosceles trapezoid-shaped portion has only two sides of equal length. The four identical panels are interconnected along their equal-length sides to form a truncated square pyramid having a rectangular box at its upper end. The square plate is mounted inside of the rectangular box parallel to a base of the pyramid to support a fire extinguisher.

The invention provides an unfavorable geological section treatment structure of an underground high-pressure gas storage and a design method of the unfavorable geological section treatment structure. The treatment structure comprises replacement concrete arranged between a weak structural layer and backfill concrete. The section of the replacement concrete in the radial direction of the gas storage is an isosceles trapezoid, the upper bottom edge of the isosceles trapezoid is connected with the weak structure layer, the lower bottom edge of the isosceles trapezoid is connected with the backfill concrete, the two waist edges of the isosceles trapezoid are connected with the surrounding rocks on the two sides of the replacement concrete respectively, and the length L3 of the upper bottom edge is smaller than the length L1 of the lower bottom edge. The treatment structure can prevent the safety problem of the gas storage caused by the characteristics of low strength, easy deformation and the like of the weak structural layer.

Prosthetic heart valve leaflets of shapes that control bending. Prosthetic heart valves can include a leaflet frame having a generally tubular shape with attached film. The leaflet frame can define a plurality of leaflet windows with the film defining at least one leaflet extending from each of the leaflet windows. Each leaflet attachment zone on the leaflet frame may have substantially the shape of an isosceles trapezoid having two leaflet sides, a leaflet base and a leaflet free edge opposite the leaflet base. The two leaflet sides can diverge from the leaflet base, the leaflet base being substantially flat.

The invention discloses an astronomical cross identification method based on spherical trapezoidal division, and the method comprises the steps: S1, taking a unit spherical surface as a celestial sphere, dividing the celestial sphere into a plurality of strips parallel to an equatorial line, and determining the right ascension span of each strip for the transverse segmentation of the strip; s2, dividing each strip into a same spherical isosceles trapezoid with two waists perpendicular to the equator, and taking the same spherical isosceles trapezoid as a sky area; s3, determining an index of each sky area; s4, dividing a star catalogue A and a star catalogue B, and creating a zipper type hash table based on the row number of the star catalogue B; s5, mapping each celestial body in the star catalogue B into a linked list in a hash table in a multi-thread parallel mode, and inserting celestial body data into the linked list by means of a two-stage insertion strategy; s6, mapping each celestial body in the star catalogue A into a linked list in a group of hash tables in a multi-thread parallel mode, and traversing to obtain celestial body IDs of which the spherical distance is smaller than the error radius; the method not only can completely avoid the problem of result omission, but also can greatly improve the astronomical cross identification calculation performance.

The invention discloses a spinning machine, belongs to the technical field of machining, adopts a forming wheel structure, and improves the efficiency and quality of workpiece machining and demolding. The spinning machine comprises a lathe bed, a forming wheel, a tail shaft and a spinning wheel, the forming wheel is formed by crossing a plurality of first forming fans and second forming fans, and the fan blades can move towards the center of the forming wheel to form a rotating body structure. In the machining process, the tail shaft abuts against the end of the forming wheel to clamp a workpiece, the spinning wheel is tightly attached to the surface of the forming wheel to move and apply pressure, and the machining precision is guaranteed. The first forming fan and the second forming fan are attached in an inclined plane mode, an isosceles trapezoid section is formed during combination, and the stability of the forming wheel and the workpiece clamping force are enhanced. And in the demolding stage, the first forming fan rotates and shrinks around the built-in rotating shaft under the driving of the oil cylinder, and meanwhile, the second forming fan is driven to synchronously move by utilizing the tensile force of the elastic body, so that the adhesive force between the workpiece and the forming wheel is effectively reduced, and lossless smooth separation of the workpiece is realized.

The invention provides a solar synchronous orbit quick response SAR satellite load platform integrated configuration, which comprises a satellite body, an SAR antenna, a solar array, a phased array data transmission antenna, a star sensor and a body-mounted solar cell, the satellite body is in a quadrangular prism shape, the cross section of the satellite body is an isosceles trapezoid, the satellite body comprises a group of opposite parallel surfaces and a group of opposite inclined surfaces, the phased array data transmission antenna and the star sensor are respectively arranged on two parallel surfaces, and the SAR antenna and the solar array are respectively arranged on two inclined surfaces; the body-mounted solar cell piece and the solar array are installed on the same inclined plane and located on the inner side of the solar array, and the solar array comprises two solar array plates and has an unfolded state and a folded state. According to the method, load platform integration is taken as a design thought, so that the AIT process of the SAR satellite and the time required by AIT are greatly shortened; meanwhile, the attitude requirements of energy and load work are met, and the reliability of the initial injection stage is improved through sufficient energy.

The invention discloses a tangential magnetizing block permanent magnet low-voltage regulation rate generator rotor structure. The voltage regulation rate of a generator is reduced from the angle of the shape of a block permanent magnet. An original permanent magnet is divided into three permanent magnets, the shapes of the three permanent magnets are changed on the premise that the number of the permanent magnets is not increased, and the shape of the rotor core is changed along with the change of the shapes of the permanent magnets. And the permanent magnets close to the air gap are trapezoidal permanent magnets, so that the magnetic resistance of a quadrature-direct axis armature reaction common magnetic flux path of the motor is reduced, the quadrature-direct axis magnetic flux is increased, the quadrature axis magnetic flux increment is greater than the direct axis magnetic flux increment, and the influence on the voltage regulation rate of the generator is greater. The permanent magnets close to the rotating shaft are isosceles trapezoid permanent magnets, and the permanent magnets in the middle are rectangular permanent magnets, so that the magnetic resistance of a direct-axis armature reaction magnetic flux path of the motor is increased, and the direct-axis magnetic flux is reduced. The shapes of the partitioned permanent magnets are matched, so that the output voltage of the permanent magnet generator is improved, and the voltage regulation rate of the generator is reduced.

The invention discloses an asymmetric extrusion preparation method for a heterogeneous magnesium alloy composite board with an adjustable layer thickness ratio. The method comprises the steps that an asymmetric extrusion die with an extrusion outlet deviating from the center is designed, and an extrusion deformation section is of a triangular section in the thickness direction and of an isosceles trapezoid section in the width direction; a VK41 magnesium alloy, a ZK61 alloy and pure magnesium are machined into blanks with the thicknesses of A, B and C, the blanks are combined according to the EZP sequence after homogenization treatment, the blanks are heated to 350-400 DEG C, heat preservation is conducted, and the extrusion speed is 1-2 mm / s; extruding by adopting an asymmetric die, and placing pure magnesium on the alpha angle side to obtain a three-layer composite board; and carrying out folding or V-shaped bending test on the processed sample. By regulating and controlling the ratio of A: B: C and the extrusion shrinkage angle, accurately controlling the layer thickness ratio, introducing shear strain to improve the texture, coordinating the tension and compression asymmetry and remarkably improving the bending performance, the process is simple, and the method is suitable for industrial production and is suitable for the fields of aerospace, automobiles and the like.

The invention provides an ultra-wide-band wide-scanning-angle planar tight coupling array antenna. The antenna comprises a plurality of antenna units which are periodically arranged; the antenna unit comprises a coating layer, a radiation layer, a wave absorbing layer and a metal floor which are sequentially arranged from top to bottom and are not in contact; the radiation layer comprises a radiation layer dielectric plate, and a radiation patch and a coupling patch which are printed on the upper surface and the lower surface of the radiation layer dielectric plate; the radiation patch adopts an interdigital dual-polarization dipole structure; the coupling patch consists of a circular metal patch and four quasi-isosceles trapezoid metal patches which are spliced on the circumference of the circular metal patch and are uniformly distributed; the wave-absorbing layer comprises a wave-absorbing layer dielectric plate and an annular thin-film resistor printed on the upper surface of the wave-absorbing layer dielectric plate. The coupling patch can increase the coupling capacitance between the dipoles so as to offset inductive reactance introduced by the floor and suppress resonance points in a frequency band, and the thin-film resistor in the wave absorbing layer can convert energy of incident electromagnetic waves into heat energy, so that the energy is dissipated and attenuated, the resonance points in the frequency band are suppressed, and the working bandwidth is widened.

The utility model relates to the technical field of conveying belts, in particular to a guide chute deviation rectifying device which comprises an installation support, a front end roller, a tail end roller, a roller driving mechanism and a conveying belt, the conveying belt is arranged on the front end roller and the tail end roller in a sleeved mode, and a plurality of sets of middle conveying mechanisms and deviation rectifying early warning assemblies are arranged on the installation support. Compared with the prior art, the conveying device has the following advantages that the multiple sets of middle conveying mechanisms are arranged, the section of the conveying belt is in the isosceles trapezoid shape with the short lower bottom, stability of materials in the conveying process is facilitated through the shape, dynamic tensioning is achieved through the design of the lower tensioning assembly, a spring and a guide rod, and the conveying efficiency is improved. The deviation correcting and early warning assembly can rapidly respond to changes of the tension of the conveying belt, maintain the tension of the conveying belt, reduce the deviation probability of the conveying belt, rapidly adjust the position of the belt and improve the deviation correcting response speed, each deviation correcting and early warning assembly comprises a deviation correcting part, a detection control part and an early warning part, and real-time monitoring and automatic adjustment of the deviation condition of the conveying belt are achieved.

The utility model discloses a plastic pipe compressive strength detection device which comprises a base, a supporting frame is arranged at the top of the base, two ends of the bottom of the supporting frame are connected with two longitudinal ends of the top of the base, a detection table of an isosceles trapezoid structure is arranged at the top of the base on the inner side of the supporting frame, and a plastic pipe is arranged at the top of the detection table. Supporting mounting plates are arranged on the two longitudinal sides of the detection table, CCD cameras are arranged on the tops of the supporting mounting plates, and a lifting supporting plate is arranged above the plastic pipe. The beneficial effects of the utility model are that the device is reasonable in design, is simple and stable in structure, and is high in practicality; the deformation condition of the plastic pipe can be monitored in real time when the pressure is applied to the plastic pipe, the plastic pipe can be positioned to be aligned with the position of the pressing plate, displacement of the plastic pipe in the detection process can be avoided, the deformation of the plastic pipe is prevented from being influenced, and the detection result is prevented from being influenced. The plastic pipe compressive strength detection device is suitable for popularization and application.

The utility model relates to the technical field of ship decks, in particular to a ship deck which comprises a base plate, a fixing plate is arranged on the outer wall of one side of the base plate, threaded holes distributed at equal intervals are formed in one end of the base plate, and fixing bolts are in threaded connection with the interiors of the threaded holes. The fixing plate is fixedly connected to the outer wall of one end of the base plate through the fixing bolts, and a mounting hole is formed in the outer wall of one side of the fixing plate. The supporting strength and the anti-pressure capacity of the whole deck are guaranteed, the deck is prevented from being seriously deformed and damaged when being impacted, meanwhile, the reinforcing plate is composed of the rectangular part and the two first isosceles trapezoid parts, the cross section of the reinforcing plate is in an I shape, the supporting capacity of the reinforcing plate to the two sides of the base plate is improved, and the service life of the base plate is prolonged. The anti-pressure capability of the whole reinforcing assembly can be improved through the arc-shaped part, meanwhile, the contact area between the second isosceles trapezoid part and the inner wall of the top of the base plate can be increased, and a good pressure reduction effect on the whole base plate can be achieved.

The invention provides a reagent mixing auxiliary device, and belongs to the technical field of mixing equipment, the reagent mixing auxiliary device is arranged on a vortex mixer host with guide columns vertically arranged at the two ends of the top, the device comprises a connecting piece, the connecting piece comprises a connecting plate, the bottom of the connecting piece is connected with the vortex mixer host, a limiting rod is arranged on the connecting plate, and an anti-collision pad is arranged in the connecting plate; the two sides of the connecting plate are each provided with a set of T-shaped rods at intervals, the placing pieces are stacked on the anti-collision pad and comprise a placing plate, placing holes are formed in the placing plate and used for placing test tubes, each placing hole is of an isosceles trapezoid structure, and an adjusting piece is arranged in each placing hole and used for adjusting the size of the corresponding placing hole; the limiting piece comprises a pressing plate, a flexible pad is arranged at the bottom of the pressing plate and used for pressing the top of the test tube, and two sets of adjusting belts are arranged on the two sides of the pressing plate at intervals and connected with the T-shaped rod. By using the scheme provided by the invention, manual pressing can be replaced during uniform mixing, the device is suitable for test tubes with different diameter sizes, and the stability of the test tubes can be ensured in the eccentric operation process of the vortex uniform mixing instrument.

The utility model relates to the technical field of cup foundation construction, in particular to a cup foundation core mold and a fixing structure thereof, the cup foundation core mold comprises a left side box body, a middle box body and a right side box body, the longitudinal sections of the left side box body and the right side box body are right trapezoids, and the lower sides of the right side of the left side box body and the left side of the right side box body are inclined outwards; the longitudinal section of the middle box body is an isosceles trapezoid or an isosceles triangle, the lower sides of the left side face and the right side face of the middle box body incline inwards, and the right face of the left box body and the left face of the right box body are matched with the left face and the right face of the middle box body. The middle box body is higher than the left box body and the right box body; compared with a traditional method, binding, supporting, pulling and fixing of the cup mouth foundation core mold are avoided, time and labor are saved when the cup mouth foundation core mold is taken out, and construction efficiency is effectively improved; meanwhile, deformation is avoided when the core mold is taken out, and turnover use of the cup rim foundation core mold is facilitated.

The utility model discloses a novel diversion trash rack for a water intake of a hydropower station, relates to the field of water conservancy and hydropower engineering, and aims to reduce hydraulic loss after water flows through the water intake of the hydropower station and is preliminarily filtered. According to the technical scheme, the novel hydropower station water intake flow guide trash rack comprises an annular frame body and a plurality of flow guide plates fixedly installed on the frame body, the plate faces of the flow guide plates are parallel to one another and are perpendicular to the corresponding plane of the frame body, the flow guide plates are in a streamline shape, the outer contours of the flow guide plates on the first section are isosceles trapezoids, and the outer contours of the flow guide plates on the second section are isosceles trapezoids. The first section is parallel to the plate surface of the flow guide plate and passes through the center of the flow guide plate, the sides, corresponding to the upper bottom, of the two waists of the isosceles trapezoid are upstream faces, the side, corresponding to the lower bottom, of the isosceles trapezoid is a downstream face, diagonal planes are arranged between the upstream faces and the two plate surfaces, and chamfers are arranged on the plate surface of the flow guide plate and corner angles between the upstream faces and the diagonal planes respectively. The device is used for being arranged at the water intake of the hydropower station to guide and filter water flow.

The invention discloses a steer-by-wire system, an endpoint limiting device of a road feeling simulator of the steer-by-wire system, a control method and a vehicle, and belongs to the technical field of steer-by-wire, the steer-by-wire system comprises a fixing frame of a hollow structure, and a first through hole and a second through hole are formed in the top surface and the bottom surface of the fixing frame respectively; the limiting nut is arranged in the fixing frame, a threaded hole of the limiting nut is opposite to the first through hole and the second through hole, and a vertical limiting groove penetrating through the top face and the bottom face of the limiting nut is formed in the peripheral face of the limiting nut; the limiting column is located in the limiting groove, the two ends of the limiting column are fixedly connected with the fixing frame, and the limiting nut is slidably connected with the limiting column; the two limiting blocks are symmetrically arranged on the two sides of the limiting nut respectively, the side faces, close to the limiting nut, of the limiting blocks are in a concave isosceles trapezoid shape, the two opposite ends of the limiting nut are located between the upper inclined face parts and the lower inclined face parts of the two limiting blocks respectively, and the limiting blocks are slidably connected with the fixing frame; the driving assembly is used for driving the limiting block to move. The limiting effect is improved, and the cost is reduced.

The utility model provides a glass kiln bubbling device, and relates to the technical field of glass production bubbling, the glass kiln bubbling device comprises a bubbling pipe, an adapter pipe and a telescopic dredging pipe, the section of the telescopic dredging pipe is in an isosceles trapezoid shape, a dredging rod is connected in the narrow end of the telescopic dredging pipe in an assembled mode, and a sealing ring is rotatably connected in the adapter pipe; a limiting block is processed on the inner wall of the sealing ring; according to the technical key points, one end of a telescopic dredging pipe is controlled at the bottom of a bubbling pipe to push a dredging rod to the top, so that in the process that the dredging rod moves up and down in the bubbling pipe, the telescopic dredging pipe shrinks from a narrow end to a wide end and is folded, and the moving stroke of the bubbling pipe is ensured; compared with the prior art that the dredging rod moves towards the top to compress a spring, the bubbling pipe dredging device has the advantages that the upward moving resistance of the dredging rod in the bubbling pipe is reduced, and the burden of workers is reduced.

The application discloses an asymmetric ring electrode cap, discards the traditional two-side uniform spherical electrode design, and adopts an asymmetric ring electrode structure, specifically, the welding end face diameter of a thin plate side electrode cap is 6-14 mm, the curvature radius is 40-100 mm, three rings are arranged, the inner ring is provided with a conical pit, and the middle ring is in the shape of an isosceles trapezoid; the welding end face diameter of a thick plate side electrode cap is not less than that of the thin plate side and not more than 14 mm, the curvature radius is not less than that of the thin plate side and not more than 100 mm, three rings are also arranged, the inner ring is provided with a conical pit, and the middle ring is in the shape of an equilateral triangle. The ring structure parameters of the two electrode caps are accurately designed to adapt to the welding requirements of plates with different thicknesses, and the welding quality and efficiency are improved. The application is particularly suitable for resistance spot welding of materials such as aluminum workpieces with large thickness ratios.

The invention provides a high-transmittance peep-proof film and a preparation method thereof.The peep-proof film comprises a substrate layer, a light-transmitting layer, a peep-proof layer and an antireflection film layer which are sequentially arranged from bottom to top, the light-transmitting layer comprises a light-transmitting base layer, a plurality of isosceles-trapezoid-shaped first protrusions are periodically distributed on the light-transmitting base layer at intervals, the peep-proof layer comprises a peep-proof base layer, and the antireflection film layer is arranged between the first protrusions and the peep-proof base layer. The peep-proof base layer is provided with a plurality of second protrusions in an isosceles trapezoid shape at intervals periodically, each second protrusion is located between every two adjacent first protrusions, the distance between every two adjacent first protrusions is matched with the lower bottom faces of the second protrusions, and the side faces, connected with the second protrusions, of the first protrusions are further provided with reflecting layers. By arranging the reflecting layer, scattering and absorption of light rays are effectively reduced, reflection of the light rays on the surface of the peep-proof film is reduced by arranging the antireflection film layer, the peep-proof film has high light transmittance, side light rays can be effectively blocked by arranging the periodic second protrusions on the peep-proof layer, and secrecy of images is protected.

The photovoltaic floor tile comprises a frame, the frame is of a regular hexagon structure, supporting legs are arranged on the lower portion of the frame, an upper cover plate is fixedly arranged at the upper end of the frame, the upper cover plate is made of thermoplastic transparent plastic, a plurality of protruding strips with the cross sections being isosceles trapezoids are arranged on the upper end face of the upper cover plate, and the cross sections of the protruding strips are isosceles trapezoids. The lower end of the frame is fixedly connected with a bottom shell, the middle of the bottom shell protrudes upwards, a groove is formed in the middle of the protrusion, the groove is filled with a photovoltaic substrate, tempered glass is arranged between the photovoltaic substrate and the upper cover plate, and the edge of the protrusion supports the edge of the lower portion of the tempered glass. The photovoltaic floor tile is antiskid, and the upper cover plate of the photovoltaic floor tile is easy to clean, maintain and replace.

The invention relates to the technical field of submerged arc welding equipment, in particular to an automatic submerged arc welding unit which comprises a cover with the section of an isosceles trapezoid structure, the cover at least comprises a horizontal plate and elastic inclined plates located on the two sides of the horizontal plate, and the included angle between the horizontal plate and the elastic inclined plates is adjustable. And the scaling powder stacked on the groove of the workpiece to be welded is shaped. According to the submerged-arc automatic welding unit, the inner space of the cover has the capacity of evenly placing the scaling powder, when the scaling powder is scattered all around, the elastic inclined plate buffers and absorbs impact force, scaling powder escape is reduced, and the scaling powder is stably isolated in the welding process; and the grid plate pokes the scaling powder in front of welding operation aside, most of splashing slag is conveyed away from the position above a groove to be welded, welding interference generated when a rear welding head passes through is reduced, the welding process is more stable, and the safety influence on workers is weakened.

The present disclosure provides a bionic Australian thorny devil grinding wheel, a grinding device, and a preparation process, and relates to the field of grinding equipment. For the problem of the poor effect of conveying grinding fluid by a grinding wheel at present, imitating semi-open capillary channels and a honeycomb structure on the skin of the Australian thorny devil, prisms with isosceles trapezoidal bottom surfaces are arranged on a matrix in sequence to form directional liquid self-conveying flow channels and a superhydrophilic honeycomb-like hexagonal distribution structure.

The utility model discloses an unmanned aerial vehicle flight anti-collision device which comprises an unmanned aerial vehicle, four connecting rods which are annularly distributed at equal intervals are installed on the outer wall of the unmanned aerial vehicle, power mechanisms are installed at the tail ends of the connecting rods, and a base is fixed to the bottom of the unmanned aerial vehicle. The section of the base is of an isosceles trapezoid structure, a groove is inwards formed in the middle of the bottom face of the base, the groove is a trapezoid groove, a buffering frame is installed in the groove, and a plurality of buffering foot pads are installed on the two sides of the bottom face of the base. The buffering foot pads and the buffering frame are installed at the bottom of the unmanned aerial vehicle, and due to the fact that the heights of the buffering foot pads are different, in the landing process of the unmanned aerial vehicle, the buffering foot pads on the two sides make contact with the ground or a platform at first, the buffering foot pad in the middle makes contact with the ground or the platform at last, and after the buffering foot pads in the middle conduct buffering, the buffering foot pads in the middle conduct buffering. The buffer frame is in contact with the ground and the platform, so that the step-by-step buffer effect is achieved, and the buffer quality is improved; the anti-collision plate located on the power mechanism can prevent the power mechanism from directly colliding with other objects.

The utility model discloses a prism structure, a visual angle expanding film, a backlight module and a display device, and relates to the technical field of optical films. The prism structure comprises a plurality of first prism parts and a plurality of second prism parts, the top of the second prism part is connected with the bottoms of the first prism parts; wherein the cross sections of the first prism parts are isosceles right triangles, the cross sections of the second prism parts are isosceles trapezoids, and the top width of the second prism parts is the total bottom width of the first prism parts. According to the utility model, the problems that the 1 / 2 light intensity range in the horizontal direction of a general display is within + / -50 degrees, and the 1 / 2 light intensity range in the vertical direction of the general display is within + / -35 degrees due to a single prism sheet, or a diffusion film and prism sheet bonding (DOP) / micro lens film and prism sheet bonding (MOP) and other structures with single prism layers in the current brightness enhancement film technology are solved; if a double-layer prism framework optical film scheme is used, the 1 / 2 light intensity range in the horizontal direction and the 1 / 2 light intensity range in the vertical direction are both lower than + / -35 degrees.

The utility model discloses a bulk cigarette counting tool which comprises a bottom plate and two side plates. The bottom plate is horizontally arranged, and the two side plates are connected to the two sides of the bottom plate in the length direction respectively and are symmetrically and obliquely connected with the bottom plate, so that the bottom plate and the two side plates form an inverted isosceles trapezoid structure; a hollow area is arranged on the bottom plate so as to clean tobacco powder in the bottom plate. Aiming at the industrial problem that scattered cigarettes in a laboratory cannot be accurately counted, the special measuring tool is designed for different circumference specifications, so that the accuracy and the convenience of the sampling quantity of samples with different specifications in the laboratory are effectively improved, the sample pollution possibly caused by manual accurate sampling and the asset quantification error caused by manual pre-estimation sampling are reduced, and the sampling accuracy is improved. Relatively rapid and accurate bulk cigarette laboratory sampling is realized.

The invention discloses a barrel type foundation structure causeway closure opening sealing structure and a construction method thereof.The barrel type foundation structure causeway closure opening sealing structure comprises a barrel type foundation structure, a plurality of guide frames and a heightening barrel body, the guide frames are installed at the bottom of the heightening barrel body, and the lower portions of the guide frames are of an isosceles trapezoid structure and extend out of the bottom of the heightening barrel body; the lower part of the guide frame is matched with the cavity of the barrel type foundation structure; when the heightening barrel body is installed on the barrel type foundation structure, the guide frame can be clamped into a cavity of the barrel type foundation structure, the heightening barrel body and the barrel type foundation structure are connected into a whole through pouring concrete, the design is reasonable, the structure is compact, it is ensured that the heightening part and the foundation structure are accurately aligned, deviation is avoided, and the construction efficiency is improved. And displacement of the heightening barrel body in the specific direction is limited, shaking caused by water flow force is prevented, the heightening barrel body and the barrel type foundation structure are connected into a whole through concrete pouring, horizontal force and vertical force can be resisted, and the overall stability of the causeway closure opening sealing structure is improved.

The utility model discloses a magnetic core heat treatment device, which belongs to the technical field of magnetic core production, and comprises an annealing furnace, a heat exchanger and a heat exchanger, a conveyor belt; the tray comprises two isosceles trapezoid discs which are integrally formed and symmetrically arranged, the upper surfaces of the two isosceles trapezoid discs are arranged in a coplanar mode, the upper bottom edges of the two isosceles trapezoid discs are connected, the lower bottom edges and the waist edges of the isosceles trapezoid discs are each perpendicularly provided with a fence, the multiple fences are sequentially connected end to end, and the upper surfaces of the two isosceles trapezoid discs are arranged in a coplanar mode. And the conveying belt is used for conveying the tray into the annealing cavity. According to the utility model, the magnetic core is in an ideal annealing temperature area, and the annealing quality of the magnetic core is ensured.

The invention provides an auxiliary structure for beach and shallow sea ecological restoration and a restoration system construction method, and belongs to the technical field of water conservancy projects for beach and shallow sea ecological restoration. The auxiliary structure comprises a combined type permeable submerged dike structure, a natural wave dissipation combined pile body and an oyster cultivation net-shaped structure. The combined type permeable submerged dike structure comprises hexagonal hollow prisms and isosceles trapezoid hollow prisms, the two prisms are of a staggered and stacked structure, and a natural shelter is provided for small marine organisms. The natural wave dissipation combined pile bodies penetrate through the combined type permeable submerged dike structure through the upper holes and the lower holes of the prisms, and the combined type permeable submerged dike structure is effectively supported and fixed. The oyster cultivation net-shaped structure is fixed to the natural wave dissipation combined pile body, and the design of the net-shaped structure meets the filter feeding environment of oyster cultivation. The repairing system is correspondingly designed based on an auxiliary structure and a field environment. The structure is simple, raw materials are easy to obtain, the protection engineering and the oyster reef body are organically combined, ecological environmental protection is achieved, and follow-up manual treatment is not needed.

The utility model relates to the field of water conservancy building blocks and ecological landscapes, in particular to a chain type ecological slope protection brick and a chain type ecological slope protection brick assembly. The chain type ecological slope protection brick comprises an I-shaped brick body, the brick body comprises a cuboid-shaped main body part, the positions, close to the end parts, of the two ends of the main body part are perpendicularly and symmetrically provided with embedding parts in an extending mode towards the two sides respectively, and the faces, close to each other, of the two embedding parts on the same side are first slope faces. And an isosceles trapezoid interlocking gap is formed between the two embedding parts on the same side and the main body part. The brick has the advantages that the structural design is simple and reasonable, the brick bodies can be effectively and mutually embedded and laid to form a whole surface, meanwhile, due to the design of the first slope surfaces, the brick bodies can relatively move and be expanded along the first slope surfaces when freezing swelling changes occur in cold weather, freezing swelling force is effectively released, and damage to the brick bodies and the laid whole is avoided.

The present invention discloses a quartz substrate lithium niobate mode spot converter, which relates to the fields of optical communication and microwave photonics. The present invention includes a quartz substrate layer, a silica cladding layer, a lithium niobate waveguide layer, an oxide interlayer and an oxide upper cladding layer. The lithium niobate waveguide layer is a three-layer stepped structure, and the cross-sections of the fiber coupling ends of the three-layer lithium niobate waveguide layers are all isosceles trapezoids. The cross-sections of the fiber coupling ends of the oxide interlayer and the oxide upper cladding layer are both provided with notches at the lower part and isosceles trapezoidal protrusions at the upper part, and the oblique side angles of the isosceles trapezoidal protrusions of the oxide interlayer and the oxide upper cladding layer and the isosceles trapezoidal cross-sections of the lithium niobate waveguide layer do not exceed 70°. The present invention can achieve high coupling and low transmission loss when optical signals are coupled between an integrated lithium niobate photonic chip and an optical fiber, and reduces the process processing difficulty, and has high practicability.