56results about How to "Guaranteed height" patented technology

The invention discloses a roll gap calibration and operation method of a hot straightening machine, and belongs to the technical field of high-temperature metallurgy. An inlet roll and an outlet roll are adjusted to be lower than a plurality of middle working rolls, and a calibration plate is conveyed between the plurality of middle working rolls and an upper working roll; the height of the upper working roller is adjusted through the oil cylinder adjusting assembly until the upper working roller makes contact with the upper surface of the calibration plate, the thickness of the current middle working roller and the thickness of the upper working roller are the thickness of the calibration plate, the inlet roller is adjusted to make contact with the calibration plate through the height adjusting device, and the outlet roller is adjusted to make contact with the calibration plate through the height adjusting device. According to the method, the phenomenon that the calibration time is influenced by manual adjustment under the condition that the roller diameters of the roller boxes are different can be avoided, calibration can be rapidly completed regardless of the roller diameters of the roller boxes, it is ensured that calibration succeeds after the roller boxes are replaced, the manual adjustment time is shortened, and the calibration efficiency is improved.

The invention discloses a self-balancing multiphase self-shunting device and a control method, and belongs to the technical field of chemical separation. The device comprises an automatic split-phase tank (1), a pressure display A (2), a system pressure automatic controller (3), a light phase collecting tank (4), a liquid discharge valve A (5), a pressure display B (6), a material inlet (7), a light phase overflow port (8), a heavy phase extraction port (9), a split-phase internal component (10), a liquid discharge valve C (11), a heavy phase extraction automatic regulating valve (12), a heavy phase collecting tank (13) and the like. The device is simple in structure and control method, can be operated at normal pressure or under pressure, is high in operation elasticity, realizes self-balance of the liquid level height by utilizing the light phase overflow port (8), realizes rapid phase separation of light and heavy components by adopting a special structure of the phase separation inner component (10), forms a stable phase interface, is good in separation effect, and is suitable for industrial production. The method can be used for chemical unit operations such as extraction separation, reaction separation and rectification.

The utility model relates to the technical field of counting plates, and discloses a blood counting plate convenient to observe, which comprises a counting plate main body, anti-skidding grooves are equidistantly formed in the front end and the rear end of the counting plate main body, a label and a direction label are arranged at the top end of the counting plate main body, and two separation grooves are equidistantly formed in the middle of the top end of the counting plate main body. A supporting column is fixedly connected to the top end of an inner cavity of the partition groove, two connecting blocks are fixedly connected to the top end of the supporting column at equal intervals, the top ends of the four connecting blocks are jointly and movably connected with cover glass, an H-shaped groove is formed in the middle of the top end of the counting plate body, and two counting pools are fixedly connected to the top end of the counting plate body at equal intervals. Different colors are arranged at the bottom end of the counting chamber, and different areas of the large grid, the middle grid and the counting chamber are distinguished through the colors, so that cell morphological characteristics are displayed more obviously, distinguishing and calculation are convenient during observation, and the placement position of the cover glass is conveniently determined through a connecting block.

The utility model belongs to the technical field of refrigeration compressors, and discloses a lower cylinder cover structure for a compressor pump body, the compressor pump body and a compressor. The lower cover body is of a cylindrical structure, and the outer diameter of the lower cover body is the same as that of an air cylinder. The lower end face of the lower cover body extends in the direction of a lubricating oil pool and is arranged close to the oil level of the lubricating oil pool. The lower cover body is designed to be of the cylindrical structure, the lower end face of the lower cover body extends towards the lubricating oil pool, the lower end of the lower cover body occupies the space above the lubricating oil pool, on the premise that the oil level of the lubricating oil pool is guaranteed, the space above the lubricating oil pool is reduced, the gathering amount of refrigerating working media is reduced, and the refrigerating efficiency is improved. The filling amount of the lubricating oil is reduced, meanwhile, the dissolving amount of the refrigerant in the lubricating oil liquid is effectively reduced, the filling amount of the refrigerant is effectively reduced, and the safety of equipment is improved.

This utility model discloses a three-dimensional heat exchanger and controller. The three-dimensional heat exchanger includes a top plate with a first protrusion having a first cavity. A first capillary structure is disposed within the first cavity and communicates with a first receiving cavity of the three-dimensional heat exchanger. After the working fluid in the three-dimensional heat exchanger evaporates in the evaporation zone at the bottom of the heat exchanger, it rises to the top of the first cavity after passing through the first receiving cavity. The vapor diffuses to the condensation zone through the vapor chamber, and the liquid phase flows back through the first capillary structure within the first cavity of the first protrusion. Because the heat exchanger of this application is more three-dimensional due to the first protrusion with a first cavity on the top plate, it can exchange heat in the vertical direction, utilizing more surface area for heat exchange. Furthermore, because the first capillary structure provides a specific channel for vapor to diffuse to the condensation zone, the liquid can also flow back to the evaporation section along a specific path, reducing the resistance to heat transfer. This improves heat exchange efficiency without excessively increasing the volume of the heat exchanger.

This invention relates to the field of viscosity detection technology, and discloses a rotational viscometer and a method for detecting surfactant viscosity. The invention utilizes a multi-axis leveling mechanism to ensure the horizontal state of the detection mounting frame and the rotational drive mechanism during position adjustment. The rotational drive mechanism outputs a rotational speed through a drive connector, which rotates within the protective frame to detect the viscosity of the surfactant in the measurement container. The leveling of the rotational drive mechanism effectively prevents rotor offset during rotation, thus ensuring the accuracy of the viscosity of the solution obtained from the rotor's output rotational speed. Furthermore, the protective frame ensures that the rotor's rotation occurs within the frame, limiting the detection space and enabling more efficient acquisition of the solution's viscosity.

The utility model relates to an automatic pin press-fitting device and system. The automatic pin press-fitting device comprises a workpiece transferring tool, a first pin receiving tool, a second pin receiving tool and a press-fitting tool. The pin press-fitting tool has the advantages that the press-fitting tool adopts a single-shaft manipulator (namely a third vertical movement mechanism) for automatic assembly, so that the perpendicularity and height of pin press-fitting are ensured, and the consistency of product assembly is ensured; the press-fitting work is automatically pressed through a servo press, and pressure and displacement intervals can be set, so that high-precision press-fitting of products is realized, and the press-fitting yield of the products is improved; the installation efficiency is high, it is ensured that the first pin and the second pin are installed in place, and the problem that the product is crushed due to overlarge pressure is avoided; manpower participation is reduced, and the production efficiency is improved.

A positioning aid for welding copper core wires to the outer wall of a ring column is provided. A ring column positioning and fixing device is fixed on a base plate, and the ring column is positioned and fixed on the ring column positioning and fixing device. Positioning plates and guide support plates are fixed on the base plate on the left and right sides of the ring column positioning and fixing device, respectively. The copper core wire, supported on the guide support plate, contacts the outer wall of the ring column welding position, and the positioning of the copper core wire on the ring column is completed when the end of the copper core wire contacts the side wall of the positioning plate. This utility model adopts a welding positioning auxiliary structure consisting of a ring column positioning and fixing device for positioning and fixing the ring column, a guide support plate for positioning the height of the copper core wire, and a positioning plate for positioning the length of the copper core wire end extending beyond the ring column. This structure can quickly and accurately determine the relative position of the ring column and the copper core wire, eliminating the problem of welding quality and welding accuracy being affected by the shaking or displacement of the ring column and the copper core wire, improving weld quality, and ensuring welding quality stability.

According to the hot press forming die for the forklift tray, guide columns are fixed to the four corners of the bottom face of an upper die frame, and the guide columns are matched with guide holes formed in the four corners of the upper end face of a lower die frame; a plurality of V-shaped grooves used for forming anti-skid grains on the tray face of the forklift tray are formed in the bottom face of the upper die, a plurality of cavity inserts are installed on the inner bottom face of the lower die, gaps reserved between the adjacent cavity inserts form reinforcing rib cavities, a die base used for supporting the lower die is arranged below the lower die, and a demolding plate is positioned between the die base and the lower die. The demolding plate is provided with a demolding auxiliary device connected with the lower mold and part of the cavity insert in the lower mold in a matched mode, and the demolding auxiliary device is driven by the upwards-moving demolding plate to jack up the forklift tray formed in the lower mold for mold drawing. According to the utility model, the problem that the forklift pallet is difficult to demould is solved, the mould stripping difficulty of the formed forklift pallet is reduced, the mould stripping efficiency and the mould stripping quality are improved, the processing period is shortened, and the processing efficiency is improved.

The utility model discloses a tool for correcting a connecting soft belt of an electrolytic cell, and relates to the technical field of electrolytic cell bus correction. One end of the correction plate is provided with a clamping plate which is connected with a column bus, the other end of the correction plate is provided with a positioning plate which is connected with a horizontal bus, and the top of the correction plate is provided with a lifting lug which is connected with lifting equipment. The correcting device is simple in structure and convenient to install, the two ends of the correcting plate limit the stand column bus and the horizontal bus, and relative displacement is avoided when the connecting soft belt is corrected.

The application provides a cloud image efficient synthesis method, belonging to the field of image processing, comprising the following steps: calculating the edge distance transform of the mask of the foreground image to generate a multi-level boundary information graph; converting the background image and the foreground image to the Lab color space, and inputting the Lab channel, the mask and the multi-level boundary information graph into a generator network to output a preliminary fusion image in the Lab color space; using a brightness discriminator and a chroma discriminator to respectively judge the local texture consistency of the preliminary fusion image and a real fusion image in the L channel, and the global color harmony of the preliminary fusion image and the real fusion image in the a and b channels; performing the adversarial training of the generator network and the discriminator based on a total loss function until the network model converges, and using the converged generator network to generate a final fusion image. The application can guarantee the high realism and consistency of the fusion image in the details and the overall color tone.

The application relates to a laminating device and laminating equipment thereof, which comprises a pressing plate, a laminating plate and an ejection mechanism. The laminating plate is arranged in pressing connection between the pressing plate and the laminating plate. The ejection mechanism comprises a first elastic member and a second elastic member, and the first elastic member and the second elastic member are arranged in the accommodating space. The first elastic member and the second elastic member can abut to the laminating plate and push the laminating plate away from the pressing plate. The double elastic member structure can provide a large demolding ejection force, and sufficient force is ensured to push out the laminating plate. The ejection mechanism can rapidly act at the moment when the hot press is opened, timely push out and avoid the laminating plate and the pressing plate from being attracted, ensure normal opening height, maintain production continuity and improve production efficiency. The ejection mechanism can reduce manual labor intensity, automatically push out and reduce safety risks without manual labor. The ejection mechanism has high universality, can be integrated on different specifications of pressing plates, does not need to reform the hot press on a large scale, and reduces equipment reform cost.

This invention discloses an intelligent adaptive dose verification calculation method and system. The intelligent adaptive dose verification calculation method includes: obtaining preliminary dose distribution data for a patient based on a deep learning-based dose prediction model; dynamically assigning variance reduction parameters to particles in a Monte Carlo simulation based on the high and low dose distribution information in the preliminary dose distribution data, wherein the variance reduction parameters include simulation weights, with simulation weights assigned to particles predicted to be in high-dose regions being less than those assigned to particles predicted to be in low-dose regions; and using a Monte Carlo dose calculation engine, simulating the planned beam based on the dynamically assigned variance reduction parameters to obtain high-precision verification dose distribution data. This invention's intelligent adaptive dose verification calculation method ensures the physical authenticity of the final verification dose distribution and the credibility of the "gold standard."

The application relates to the field of high-end equipment manufacturing technology, in particular to a large-size shaft end nut locking anti-loosening structure and method. The anti-loosening structure comprises a snap ring fixed in the circumferential direction of a main shaft, a locking nut abutting against the end face of the snap ring and a limiting pin. The bottom of the limiting pin abuts against an elastic pad, and the top of the limiting pin protrudes from the end face of the snap ring. A plurality of pin holes are formed in the locking nut. When the locking nut is screwed on the main shaft close to the snap ring, the limiting pin is axially compressed and moves close to the side of the elastic pad along the groove. When the locking nut abuts against the snap ring, the limiting pin is embedded in the pin hole under the elastic force of the elastic pad, the reverse rotation of the locking nut is limited, the size of the axial pre-tightening force of the wheel hub bearing is stabilized, the bearing clearance of the wheel hub bearing is kept within the set value, the mechanical performance of the wheel hub bearing unit is improved, the service life of the wheel hub bearing unit is prolonged, and the driving safety of the automobile is improved.

The utility model discloses an exhaust system of an aluminum casting die, which comprises a gas guide tank, the bottom end of the gas guide tank is fixedly connected with supporting legs, the top end of the left side of the gas guide tank is fixedly connected with a gas inlet, the right side of the gas guide tank is fixedly connected with a gas outlet, and a reset structure for an automatic closing device is arranged in the gas guide tank. According to the exhaust system of the cast aluminum mold, the movable plug is arranged, after the exhaust system is connected with an exhaust channel of the cast aluminum mold, air in the mold is guided into the top end of the interior of the air guide tank through the air inlet, the movable plug can be pushed to descend after the air pressure of the top end of the interior of the air guide tank reaches a certain value, and after the movable plug descends, the air outlet communicates with the interior of the air guide tank; and after the air pressure is reduced, the spring quickly jacks the movable plug back to enable the movable plug to be attached to the bottom of the positioning ring, so that the device is automatically closed while the aluminum liquid is prevented from overflowing, and the problem of automatic opening and closing is solved.

The present invention relates to the technical field of medical devices, and discloses a cranial surgery positioning device, comprising a base and a mounting seat movably arranged on the upper side of the base, a housing slidably arranged on the side of the mounting seat, a screw rod rotatably arranged inside the housing, a threaded sleeve threadedly connected to the middle of the screw rod, a clamping rod installed on the outside of the sleeve, a clamping piece for clamping a muscle flap slidably arranged at the end of the clamping rod, a second gear installed at the end of the screw rod, a second rack installed on the side of the mounting seat, the second rack intermittently meshing with the second gear, a clamping block installed at the bottom of the housing, and a limited block movably arranged inside the mounting seat. Pull the housing backward, the meshing of the second gear and the second rack drives the screw rod to rotate, and then the screw rod and the sleeve are used in conjunction, so that the clamping rod drives the clamping piece to clamp the muscle flap, then the second gear and the second rack are separated, and the position of the housing is fixed by the use of the clamping block and the limit block, so as to quickly position the muscle flap.

The utility model relates to a combined ring rolling mill mould, the combined ring rolling mill mould includes main roller axle, the main roller axle outside fixed cover sets up with the cover and main roller mould, the cover has two, is located the upper end and lower extreme of main roller mould respectively, through the ring plate cover setting in the cover outside, the cover restricts the axial movement of ring plate, again passes through the ring plate respectively two pin rods, the part of pin rod is exposed in the cover inside and is connected with the cover outside, the cover restricts the up and down movement of pin rod, and the pin rod also restricts the up and down movement of ring plate, fixes together with the cover and ring plate, thereby increases the outer diameter of cover, guarantees the stability of material height and material moving direction in the ring rolling process of different thickness ring class forgings, guarantees that the shape of forging conforms to the design requirement.

The invention provides a bottled milk packaging system which comprises a bottled milk conveying line, a heat shrinkage film labeling machine and a heat shrinkage film forming machine which are sequentially erected on the bottled milk conveying line, and a heat shrinkage film pre-shaping device is erected between the heat shrinkage film labeling machine and the heat shrinkage film forming machine. The two sides of the conveying face of the bottled milk conveying line are each provided with a limiting stopping piece, the two limiting stopping pieces are oppositely arranged and extend in parallel in the conveying direction of the bottled milk conveying line, one ends of the two limiting stopping pieces extend to an input port of the heat shrinkage film labeling machine, and the other ends of the two limiting stopping pieces extend into the heat shrinkage film pre-shaping device. The heat shrink film pre-shaping device is in contact with the two sides of the outer side wall of the bottled milk entering the heat shrink film labeling machine, a stopper is formed on the outer side wall of the bottled milk, a heat shrink film bottle label sleeving the outer wall of the bottled milk is limited, and the heat shrink film pre-shaping device and the bottled milk conveying line operate at the same speed and in the same direction so as to assist in conveying the bottled milk into the heat shrink film pre-shaping device for pre-shaping. And the heat shrinkage film bottle labels are kept highly consistent on the bottled milk.

The invention provides a positive plate and a battery cell, relates to the technical field of batteries, and is used for solving the technical problem of breakage of a pole piece caused by embossing on the pole piece in the related art, the positive plate comprises a current collector, two surfaces of the current collector are respectively provided with a first active material layer and a second active material layer, a plurality of convex parts are arranged on the first active material layer, and a plurality of concave parts corresponding to the convex parts are arranged on the second active material layer; each of the first active material layer and the second active material layer comprises a plurality of active material particles, and the particle size distribution of the active material particles meets the formula: Dv10: Dv50: Dv90 = 1: (2-8): (3-16). By limiting the particle size distribution of the active material particles in the active material layer, when the large and small particles in the active material layer are mixed and the convex part and the concave part are processed on the positive plate, the small particles are stressed to slide towards two sides and are filled among the large particles, so that the current collector is prevented from being torn while the particles are prevented from being broken; and meanwhile, the height of the lug boss is ensured to meet a preset requirement.

The utility model relates to the technical field of punch protection, and discloses a punch protection device which comprises a workbench. The mounting seat comprises a base arranged on the workbench; the telescopic protection part comprises a placement ring arranged on the base and a plurality of protection plates arranged on the placement ring, the placement ring is in sliding fit with the base, the protection plates are distributed in the vertical direction, and every two adjacent protection plates in the vertical direction are in sliding fit with each other; and the adjusting part is used for adjusting the overall height of the telescopic protection part. The stamping device has the effect of reducing the possibility that chippings fly to the body of a worker when a workpiece is stamped.

The invention belongs to the technical field of visual inspection, and particularly relates to a detection device and method for active nano calcium carbonate production, the detection device comprises a drying machine, a discharging bin located in the drying machine, a storage plate detachably mounted on the discharging bin and visual inspection equipment, and positioning blocks are arranged on the two sides of the discharging bin; a material collecting box is slidably mounted between the two positioning blocks, a smoothing claw is rotatably mounted at the bottom end of the material collecting box, a first winding wheel is arranged at one end of the interior of each positioning block, a second winding wheel is arranged at the other end of the interior of each positioning block, the first winding wheels are fixedly connected with the material collecting box through first connecting ropes, and the second winding wheels are connected with the material collecting box through second connecting ropes; calcium carbonate powder on the object placing plate is smoothed through the smoothing claw, it is guaranteed that the surface height of the powder is consistent, meanwhile, floating materials between the object placing plate and visual inspection equipment are rapidly sucked away, the hidden danger that dust scatters light rays and forms a fog screen effect is thoroughly eliminated, and the accuracy and reliability of visual inspection are remarkably improved.

The utility model relates to the technical field of house building construction equipment, and provides a climbing frame spraying device which comprises a spraying head and a water conveying pipe, the spraying head is arranged on a movable base, an operating rod is arranged on the base, a mounting frame is arranged on the base, a height adjusting part and an angle adjusting part are arranged on the mounting frame, and the spraying head is arranged on the mounting frame. The nozzle is connected with the height adjusting part and the angle adjusting part. A threaded rod is driven by a transmission structure to rotate, a supporting pipe is stressed in the rotating process of the threaded rod, the supporting pipe moves up and down, so that height adjustment is achieved, meanwhile, self-locking is achieved under the effect of threads, the height of the supporting pipe is fixed to a certain degree, and a spray head is kept at a certain height; the worm gear and the worm are matched to drive the mounting shaft and the nozzle to rotate, the transmission ratio of the worm gear and the worm is large, the structure is compact, meanwhile, the worm gear and the worm can realize self-locking, and the nozzle is prevented from rotating due to the influence of other forces.

The application discloses a single board self-calibration corn ear multi-traits intelligent examination method and system. The method comprises the following steps: collecting an ear image containing a space reference mark, establishing a pixel physical coordinate mapping relationship and performing geometric correction; using a generative image inpainting model to perform semantic filling and texture repair on the kernel missing area, and detecting the kernels in the repaired ear area to obtain the kernel detection frame position and center point coordinates; based on the spatial distribution of the kernel detection frame, the ear row number is calculated through detection frame compression and horizontal line statistics; the ear kernel number is calculated by combining peak value analysis; the appearance quality traits are analyzed, including color classification, number statistics of different color kernels, disease detection, type determination of horse teeth and analysis of bare tips, and multi-dimensional phenotype examination results are synchronously output. The application does not need complex mechanical rotation, can realize multi-ear synchronous collection and multi-dimensional phenotype analysis, significantly improves the examination efficiency and data objectivity, and is suitable for high-throughput breeding scenes.

The utility model relates to a front overhang supporting tool which comprises a supporting piece with the vertical length adjustable, a transverse arm with the root connected with the supporting piece and a clamping piece connected to the transverse arm, the lower end of the supporting piece is used for being supported on a front overhang upper control arm, and the upper end of the supporting piece is used for supporting a vehicle body. The clamping piece is used for being clamped on a front overhang upper control arm. The front overhang supporting tool can support a vehicle body when a front overhang air spring fails, so that the height of the front portion of the vehicle body is guaranteed, normal running and running of the vehicle are guaranteed, and the front overhang supporting tool has the advantages of being simple in structure and easy to use.

The invention discloses a shear type linear feeding mechanism of a grinding ball forging machine, which comprises a rack, the rack is provided with an upper clamping arm and a lower clamping arm, the upper clamping arm and an upper clamping arm gear rotate on the rack by taking an upper clamping arm shaft as an axis, the lower clamping arm and a lower clamping arm gear rotate on the rack by taking a lower clamping arm shaft as an axis, the upper clamping arm is provided with an upper clamping wheel set, and the lower clamping arm is provided with a lower clamping wheel set. The upper clamping arm is located between the lower clamping arm and the air cylinder, the air cylinder is connected with the upper clamping arm through a first air cylinder shaft, the air cylinder drives the upper clamping arm to rotate on the machine frame with the upper clamping arm shaft as the axis, the upper clamping arm drives the lower clamping arm to rotate on the machine frame with the lower clamping arm shaft as the axis through the upper clamping arm gear and the lower clamping arm gear, and therefore the upper clamping wheel set and the lower clamping wheel set clamp round steel. The upper clamping wheel set comprises an upper rotating plate, the upper rotating plate rotates on the upper clamping arm, and the upper rotating plate is provided with a first upper wheel and a second upper wheel which are in linkage. By means of the rotating clamping arms and the rotating clamping wheel set, shearing type clamping conveying of round steel is achieved, the height of the conveying axis of the round steel is guaranteed, even if the wheel set is abraded, the upper clamping arm and the lower clamping arm which are continuously clamped can avoid deviation of the conveying axis, the conveying wheels with power can always press the round steel, and linear feeding of the round steel is achieved.

The utility model discloses a welding clamping device used for an automobile ventilation pipe, which comprises a clamping device body used for positioning the ventilation pipe and a welding piece, the ventilation pipe comprises a connecting part, and the welding piece comprises a connecting piece, a first welding frame and a second welding frame. The clamping device body comprises a support used for supporting the connecting part, a first fixing arm, a second fixing arm, a first fixing assembly used for fixing the connecting piece, a second fixing assembly used for fixing the first welding frame and a third fixing assembly used for fixing the second welding frame, wherein the first fixing arm and the second fixing arm are used for fixing the connecting part to the support. The first fixing arm is used for fixing the end, connected with the connecting piece, of the connecting part, the second fixing arm is movably connected to the support in the axial direction of the connecting part, and the third fixing assembly is movably connected to the support in the radial direction of the connecting part. By means of automatic replacement of the clamping assemblies, similar connecting pieces can be welded in the same clamping device, the welding efficiency is improved, and the machining cost is reduced.

The pot support comprises a support assembly and a multi-layer ring, the support assembly comprises a support ring and a pot supporting portion, the multi-layer ring is provided with a hollowed-out structure, the hollowed-out structure is used for allowing the pot supporting portion to penetrate through in the vertical direction, the lower surface of the multi-layer ring is provided with a plurality of protrusions, and the protrusions are matched with the support ring. The lower surfaces of the protrusions are flush with each other, and the lower surfaces of the protrusions make contact with the support ring so as to limit the freedom degree of movement of the multiple layers of rings in the vertical downward direction. The protrusions are arranged on the lower surface of the multi-layer ring, the multi-layer ring is erected on the support assembly through the protrusions, the levelness of the multi-layer ring is guaranteed, meanwhile, a circulation gap for secondary air is formed between the multi-layer ring and the support ring, and due to the fact that the levelness of the support ring and the levelness of the multi-layer ring are guaranteed, the circulation gap is formed between the multi-layer ring and the support ring. The height of each part of the circulation gap can be ensured to be consistent, so that uniform supplement of secondary air is ensured, flue gas emission of combustion is reduced, and the combustion efficiency is improved.

The outdoor Roman umbrella with different height adjusting structure comprises an umbrella column and an umbrella frame, the umbrella frame is installed in cooperation with a handrail seat, further comprises a lifting driving mechanism, the lifting driving mechanism comprises a driving assembly and a lifting umbrella column, the driving assembly is used to drive the lifting umbrella column to protrude from the top end of the umbrella column or to be accommodated in the inner cavity of the umbrella column, the handrail seat comprises a locking assembly; when the locking assembly is unlocked from the umbrella column, the driving assembly drives the lifting umbrella column to lift or lower; when the locking assembly is unlocked from the umbrella column and the lifting umbrella column stops at any one of the liftable heights, the handrail seat moves along with the umbrella column height, and the inclination angle of the umbrella frame is adjusted. The present application can not only depend on the handrail seat to adjust the inclination of the umbrella surface, but also can move the lifting umbrella column and the handrail seat in the same direction, so that the height of the umbrella surface is changed and still kept horizontal, and the operation process is simple and convenient; the positioning structure and the locking structure for moving the handrail seat up and down along the umbrella column are arranged on the inner end face of the umbrella column, so that the packing volume is saved and the transportation cost is reduced.

The present application provides an extremely wide beam, broadband, low back lobe GNSS positioning antenna, comprising a radiating plate, a feeding probe, a cavity, a feeding network, a plurality of radiating plate dielectric gaskets and radiating plate dielectric screws: the radiating plate comprises a directly fed radiating plate 1, a directly fed radiating plate 2, a parasitic plate 1 and a parasitic plate 2; the feeding probe is fixed to the directly fed radiating plate 1 and the directly fed radiating plate 2; the radiating plate dielectric screw passes through the radiating plate and the radiating plate dielectric gasket, and is fixed to the cavity by threads; the radiating plate dielectric gaskets are respectively located between the radiating plate and the cavity, and are used to maintain the height of the radiating plate and make the radiating plate parallel to the upper surface of the cavity; the feeding network is arranged at the lower part of the cavity, and is electrically connected to the directly fed radiating plate 1 and the directly fed radiating plate 2 through the feeding probe, and is used to directly feed the directly fed radiating plate 1 and the directly fed radiating plate 2, and to couple and feed the parasitic plate 1 and the parasitic plate 2, so that the antenna is compatible with more navigation frequency bands and a wider beam.