2758 results about "Conical surface" patented technology

The invention discloses a rod type six-component optical fiber balance and an FBG grating installation method, and belongs to the technical field of optical fiber balances. The problems that an existing optical fiber balance is low in sensitivity, the measuring capacity of the existing optical fiber balance is affected, and wiring is not convenient are solved. A first group of four-column strain beams, a resistance element supporting sheet, a second group of four-column strain beams and an equal straight section are sequentially arranged between a model end conical surface and a fixed end conical surface, a resistance element elastic element is arranged on the resistance element supporting sheet, and the equal straight section is connected with the fixed end conical surface through an M42 left-hand thread; the first set of four-column strain beams, the second set of four-column strain beams and the resistance element supporting piece are all provided with optical fiber wiring grooves machined along the centers of the beams, and optical fibers are arranged in the optical fiber wiring grooves. According to the rod type six-component optical fiber balance and the FBG grating installation method, the measurement capability of the optical fiber balance and the wiring convenience are improved, on the other hand, a sensitization structure is optimized to a certain degree, and the sensitivity of the optical fiber balance is improved.

The invention provides a double-curved-surface hole wall rotational flow umbrella oil nozzle for low-carbon fuel and a machining method, and relates to the technical field of gas turbine fuel injection. The nozzle comprises a needle valve, a needle valve seat, a spraying hole and a rotational flow groove; the needle valve and the needle valve seat form a sealing conical surface, the inner wall face of a spraying hole of the curved-surface rotational flow umbrella spraying nozzle is a double curved surface, the double curved surface and the sealing conical surface form a ruled surface, the rotational flow groove is formed in the inner wall face of the spraying hole, and the direction of the rotational flow groove is the generatrix of the ruled surface. The inner wall face of the spraying hole is designed to be the curved face, fuel is better guided to flow in the oil nozzle, the area of a low-pressure area is reduced due to sudden change of the direction in the fuel flowing process, and therefore cavitation is restrained from occurring and developing, and the phenomena that the spraying hole is blocked and mist spraying is unstable due to cavitation are improved; the rotational flow grooves in the curved surface can be achieved through the electric spark machining technology, the machining difficulty is reduced, meanwhile, the turbulent kinetic energy and the radial momentum of fuel can be effectively improved, spray distribution is more uniform, and the atomization quality is improved.

The invention relates to the technical field of pinhole piece wall thickness detection, in particular to an electric connector pinhole piece wall thickness detection device and method, a swing arm is rotationally installed on an adjusting frame, the swing arm is pressed on the upper end face of a pinhole piece, and a limiting piece for limiting the swing arm to rotate away from the pinhole piece is arranged on the adjusting frame; the device has the beneficial effects that by arranging the detection conical column with the standard size, the pressing height of the hole opening of the pinhole piece and the conical surface of the detection conical column and the inner diameter of the hole opening are detected, meanwhile, the thickness measuring probe is accurately inserted into the detection hole, the thickness measuring probe can conveniently detect the inner contour of the detection hole, and the detection efficiency is improved in the detection process. During detection, only the pinhole piece needs to be controlled to stably descend, so that the detection efficiency is greatly improved, the detection steps are simplified, the device is suitable for large-scale detection, and whether the internal contour of the detection hole is qualified or not can be judged by comparing the inner diameter data of the orifice with the detection data of the thickness measuring probe.

The invention discloses a pipeline inner wall panoramic three-dimensional scanning device and a measuring method, and the device comprises a panoramic plane laser generator which comprises a point laser generator, an axicon, a laser focusing lens, a conical surface reflector and a transparent cylindrical support, and is used for transmitting a 360-degree panoramic plane laser beam to the inner wall of an object to be measured; according to the invention, single-exposure full-circumferential high-precision three-dimensional measurement is realized, and the device can synchronously obtain complete three-dimensional point cloud data of the circumference of the inner wall of the whole pipeline at the moment of single exposure through innovative combination of a panoramic annular imaging system and a panoramic planar laser projection technology; the method has the advantages that axial rotary scanning or multi-view data splicing required by a traditional method is avoided, measurement efficiency is improved, splicing accumulative errors are avoided, laser stripe image acquisition is complete and free of breakpoints, and completeness and accuracy of three-dimensional reconstruction data are guaranteed from the source.

The invention relates to the field of cable connectors, and discloses a separable cable connector which comprises a shell assembly composed of an upper shell body, a middle shell body and a lower shell body which are detachably connected, and the middle shell body is connected between the upper shell body and the lower shell body; the insulator is installed in the shell assembly, a conical groove is formed in the bottom of the insulator, an assembling groove is formed in the top of the insulator, and a sleeve is installed in the assembling groove; and the conical stress body is mounted in the conical groove, and the lower shell is in contact with the conical stress body. According to the self-locking terminal assembly, the shell assembly composed of the upper shell, the middle shell and the lower shell supports local overhaul, the shell does not need to be integrally disassembled, meanwhile, the situation that an internal insulator is damaged due to disassembly operation is avoided, the maintenance cost is reduced, and the self-locking terminal assembly adopts a three-dimensional composite design of a groove-shaped structure, conical surface matching and spiral screwing; axial screwing-in force is converted into radial locking force, and bidirectional anti-vibration locking of the cable conductor is achieved.

The invention discloses a stabilizing support of an air sampler, and belongs to the technical field of environment monitoring equipment, the stabilizing support comprises a support body and a bearing platform used for bearing the sampler, the top of the support body is connected with the bearing platform through a universal spherical hinge assembly, and the universal spherical hinge assembly comprises a base, a universal ball head and a short supporting column; the universal ball head is connected with the bearing platform through a short supporting column, a gravity center adjusting bin is fixedly arranged below the bearing platform, a lantern ring type locking mechanism is arranged on the opening portion of the base, and three or more radial guide grooves are formed in the end face of the opening portion of the base in the circumferential direction of the base. Each radial guide groove is internally provided with a locking block capable of sliding along the groove, the locking lantern ring can be rotated to move in the axial direction of the base, and then the locking blocks are driven to synchronously move inwards along the radial guide grooves through the conical surface extrusion effect so as to tightly hold the universal ball head. The problems that in the prior art, leveling efficiency is low, locking is prone to loosening, and the anti-overturning capacity is poor are effectively and comprehensively solved.

The invention discloses a laser cutting machine for aluminum profile machining, and relates to the technical field of laser cutting machines for aluminum tube machining. The grinding unit is used for grinding the cutting edge of the aluminum profile cut by the laser cutter, the driving unit is used for driving the grinding unit to periodically rotate, and the adjusting unit is used for being matched with the laser cutter to move to adjust the position of the grinding unit. A torsional spring is arranged between a fixing plate and a laser cutting head, so that a shearing needle is elastically connected with the laser cutting head, the effect that the shearing needle moves along with the laser cutting head in the same path is achieved, and the shearing needle is more stable in shearing due to the fact that a conical surface is arranged on the outer wall of the shearing needle and matched with a second spring to release elastic force downwards to the shearing needle. The shearing needle is extruded into a cutting seam of the aluminum profile, the effect of synchronously conducting laser cutting and grinding is achieved, the shearing needle at the top of the cutting waste is driven by a second spring to downwards push the cutting waste, and it is ensured that the cutting waste is completely separated from the aluminum profile.

The invention discloses a cutter shell and blade welding machine for blade type hob machining, and relates to the technical field of welding. The cutter shell and blade welding machine for blade type hob machining comprises a machine body, a rotary feeding mechanism and a machining assembly, the machining assembly comprises a welding main machine and a hydraulic cylinder, a welding head is fixedly installed at the telescopic end of the hydraulic cylinder, a welding gun is installed at the bottom of the welding head, and an auxiliary module is installed on the side of the surface of the welding head; the rotary feeding mechanism comprises a rotating disc and a rectangular opening, a limiting frame is fixedly connected to the edge of the surface of the rotating disc, a square guide rod is slidably mounted at the top of the surface of the limiting frame, a centering cone is fixedly connected to the end, extending out of the limiting frame, of the square guide rod, and a triangular block is fixedly connected to the conical surface of the top of the surface of the centering cone. An adjusting assembly is installed at the top of the rotating disc, the anti-rolling purpose is achieved, positioning can be conducted, deviation is not prone to occurring, the positions of the blades and the cutter shell are accurate, batch welding is convenient, and safety and reliability are achieved.

The utility model relates to the technical field of positioning tools, and particularly discloses a quick positioning device for processing internal and external key grooves, which comprises a mandrel, an expansion sleeve, a nut and a processing workpiece, a threaded section is arranged on the surface of the mandrel, a positioning block is fixedly arranged on the surface of one end of the mandrel, a clamping groove is arranged on the outer circumferential surface of the expansion sleeve, and key grooves are arranged in an inner hole of the processing workpiece. Positioning strips are fixedly arranged on the outer circumferential surface of the expansion sleeve. According to the technical scheme, the opening seams are evenly distributed in the two ends of the expansion sleeve, the mandrel is attached to the conical surface of the expansion sleeve, the expansion sleeve is matched with the nut to achieve radial expansion of the expansion sleeve and used for clamping a workpiece, the positioning strip of the expansion sleeve is connected with the key groove of the machined workpiece in a clamped mode, and anti-play assembly of the expansion sleeve and the machined workpiece is achieved. The mandrel is clamped into the clamping groove of the expansion sleeve through the positioning block to achieve anti-play assembly of the mandrel and the expansion sleeve, so that when the two ends of the mandrel are fixed, a machined workpiece can be rapidly positioned, and the outer key groove to be machined of the machined workpiece can be conveniently machined.

The invention belongs to the technical field of engineering elements, and discloses a pressure selection valve, a pressure stop valve structure and a hydraulic system. The pressure selection valve at least comprises a valve sleeve, a first valve element and a second valve element, the valve sleeve is at least provided with a first oil port and a second oil port, the first oil port and the second oil port are communicated with an inner cavity of the valve sleeve, and the first valve element and the second valve element are sequentially arranged in the inner cavity in a sliding mode. When the oil pressure at the first oil port is larger than that at the second oil port, the first valve element can abut against and push the second valve element, so that the second valve element can stretch out through the first opening and abut against and push an external stress piece. When the oil pressure at the first oil port is smaller than the oil pressure at the second oil port, the first valve element and the second valve element are far away from each other, and the second valve element can stretch out through the first opening and abut against an external stress piece. According to the pressure selector valve, a conical surface sealing structure is omitted, the machining difficulty of the hole and the valve element is reduced, the machining cost is saved, and the pressure selector valve has good economical efficiency.

The utility model relates to the technical field of bearing disassembly metallurgy vehicle automatic joint devices, in particular to a double-four-connecting-rod lifting steel ladle bottom argon blowing automatic joint device which comprises a bottom argon blowing arc-shaped male joint, a high-temperature-resistant seal and a supporting frame, and the bottom argon blowing arc-shaped male joint is arranged above a fixing rod and can slide up and down. The device is characterized in that a four-connecting-rod lifting mechanism is arranged in the supporting frame, and the four-connecting-rod lifting mechanism is connected with the fixing rod; the bottom argon blowing arc male connector and the fixing rod are directly provided with a compression spring. The utility model has the advantages that: firstly, the spherical guide of the male connector is utilized, the sealing connection of the conical spring is reliable, the ladle car can be transformed and used on the basis of the original ladle car, the manufacturing cost is low, the sealing is reliable, steel slag blocks can conveniently flow down along the conical surface, the conical surface sealing is not easy to remain steel slag, and the conical surface is firmly matched without air leakage; and secondly, the device is simple in structure and convenient to transform and install, the working intensity of the bottom argon blowing joint of a maintainer is reduced, and the steelmaking labor productivity is improved.

The invention discloses an energy-saving kitchen electric meat grinder, and belongs to the technical field of electric meat grinders, the energy-saving kitchen electric meat grinder comprises a driving unit for driving a cutting shaft to rotate and a meat grinding vessel, the bottom end of the meat grinding vessel is fixedly connected with a base, and the axis of the top end of the base is connected with a butt joint limiting shaft; a sealing discharging assembly used for protecting the bottom end of the cutting shaft is arranged outside the butt joint limiting shaft. According to the meat mincing device, through the arrangement of the sealed discharging assembly, when a double-cone body rotates along with the cutting shaft, meat blocks can be guided to move by utilizing the geometrical characteristics of the conical surface of the double-cone body, so that the meat blocks are continuously discharged outwards from the bottom of the axis, the meat blocks are prevented from being accumulated at dead angles, and the meat mincing uniformity and efficiency are improved; when the cutting shaft approaches to stop rotating, locking is released through the I-shaped ring and the driving ring, so that the upward cutting blade and the downward cutting blade rotate freely, system resistance is released immediately, a driving unit and the blades are protected against extreme load damage, and the equipment jamming fault is avoided.

According to the robot vision calibration device and method, through collaborative design of the industrial personal computer, the vision system, the robot, the calibration jig and the calibration plate, the problems caused by complex structure, low calibration precision and poor adaptability in the prior art are solved. A floating mechanism of the calibration jig is combined with a displacement sensor to realize multi-degree-of-freedom dynamic displacement compensation, so that mechanical positioning errors are remarkably reduced; the conical surface guide structure and the reference hole layout of the calibration plate optimize the stability of the positioning reference, and ensure the accurate embedding of the calibration needle. The flexible installation of the visual system adapts to different scene requirements. According to the calibration method, the generation of a high-precision visual calibration matrix is realized through the processes of multi-reference hole coordinate recording, calibration ring coordinate calculation and visual image acquisition and matching. According to the whole scheme, through a dynamic compensation mechanism and intelligent process design, the calibration precision, efficiency and robustness are improved, meanwhile, the operation complexity is reduced, and reliable technical support is provided for an industrial automation scene.

The invention relates to the technical field of batteries, in particular to a battery cover plate assembly and a battery, the battery comprises a shell and a pole group, the pole group is mounted in the shell, the battery cover plate assembly comprises a cover plate, a pole column and a fixing ring, the cover plate is mounted at the opening end of the shell, a mounting through hole formed in the first preset direction is formed in the cover plate, and the pole column is mounted in the through hole; mounting through holes are also formed in the pole columns, and the tabs of the pole group penetrate through the mounting through holes to be bent and then abut against the pole columns; the pole comprises a body and a mounting lug boss, and the mounting lug boss is arranged in the shell; the fixing ring is arranged outside the mounting lug boss in a sleeving manner; and the inner wall of one end of the fixing ring is provided with a flanging and riveting matching conical surface which is matched with the end part of the mounting lug boss. The brand new cover plate structure is provided, a connecting piece is removed, the space utilization rate is improved, the cover plate, the upper insulating part, the lower insulating part and the like are fixed together through the fixing ring, the turning riveting matching conical surface is matched with the installation protruding part, and the stability and firmness after assembly are improved.

The present application relates to a kind of rocket engine injector thin-wall milling self-positioning fixture and assembly method, it mainly includes upper positioning tire body component, conical surface expansion ring, tire unloading bottom plate, pressing cover plate, tire unloading lifting ring, pressing bolt, expansion screw, lower positioning bottom plate component, locking bolt, long fixed bolt, lower positioning bottom plate component is fixed in machine tool workbench by locking bolt long-term, always not disassembled.Product is positioned and clamped and supported by conical surface expansion ring, tire unloading bottom plate, pressing cover plate, pressing bolt, expansion screw before milling injector thin-wall and positioning tire body component, limit the radial and axial movement of injector thin-wall;Injector thin-wall is positioned and clamped and supported by conical surface expansion ring, tire unloading bottom plate, pressing cover plate, pressing bolt, expansion screw before milling injector thin-wall and positioning tire body component, limit the radial and axial movement of injector thin-wall;Injector thin-wall is positioned and clamped and supported by conical surface expansion ring, tire unloading bottom plate, pressing cover plate, pressing bolt, expansion sleeve before milling injector thin-wall and positioning tire body component, limit the radial and axial movement of injector thinn

The invention relates to the technical field of proportional valves, and discloses a stepless speed regulation proportional valve with displacement detection, which comprises a valve body, a proportional controller is arranged at the bottom of one side of the valve body, a proportional cavity is arranged in the valve body, the size of the bottom of the proportional cavity is larger than that of the top, a conical surface is arranged at the joint, and an inlet cavity is arranged at the top of one side of the valve body. An outlet cavity is formed in the bottom end of the valve body, a valve rod is arranged in the valve body, a valve element is fixedly arranged at the bottom of the valve rod, a permanent magnet is arranged at the top of the valve rod, a shell is arranged at the top end of the valve body, and a displacement detector is arranged in the shell. When the valve rod drives the valve element to move, the displacement detector can move synchronously under the action of the supporting spring, the position, the movement speed and the movement direction of the valve element are detected, and the accuracy of the proportional valve is guaranteed; and the positions of the connecting pipe and the pipeline can be preliminarily positioned through the arranged positioning clamp.

The utility model discloses an anchor rod device for municipal construction, and relates to the technical field of municipal construction engineering. Comprising an anchoring head, a counterbore is formed in the anchoring head, the anchoring head is in threaded connection with an outer sleeve through the counterbore, an insertion rod is in threaded connection with the interior of the outer sleeve, a conical surface concave shoulder is arranged at the bottom end of the insertion rod, grooves are formed in the side walls of the periphery of the anchoring head, the grooves are communicated with the counterbore, claw bodies are hinged into the grooves, and the tail ends of the claw bodies are attached to the conical surface concave shoulder. According to the anchor rod device for building municipal administration, the inserting rod is lifted upwards by screwing the inserting rod, at the moment, the conical surface concave shoulder at the bottom end of the inserting rod moves upwards, the claw can be driven to expand outwards from the periphery of the anchoring head, and therefore the friction force between the anchor rod piece and a soil body or rock is enhanced, and the anti-drawing capacity of the anchor rod piece is effectively improved; the arranged guide rods, backing rings and buffer springs have certain buffering performance, deformation and displacement of the structure can be reduced, overall connection of the structure is enhanced, and the anti-seismic performance and stability of the structure are improved.

The invention belongs to the technical field of engineering elements, and particularly relates to a connector for a heat dissipation water tank and a working method thereof. The connector for the heat dissipation water tank comprises a female connector arranged on the side wall of the water tank; the male joint is matched with the female joint and is arranged at the end part of a water outlet pipe of the generator set; the adjusting and sealing assembly comprises an inner sealing pipe arranged in the female connector in a sliding mode and an outer adjusting pipe arranged outside the female connector in a sleeving mode. After the male connector is inserted into the female connector, water flow pushes the inner sealing pipe to move towards the water tank, and the end of the inner sealing pipe abuts against the reducing conical surface in the female connector in a sealed mode. When the inner sealing pipe axially moves, the water outlet pipe is tightened to reduce water flow impact on the female joint; by adjusting the matching of the sealing assembly, the male joint and the female joint, the impact force of water flow on the female joint is reduced, and the sealing performance of the male joint and the female joint is improved.

The utility model relates to a spiral slag ladle containing gas, which is arranged on the edge of a pouring gate and comprises a curved overflow channel and a slag ladle, one end of the curved overflow channel is communicated with a slag outlet on the edge of the pouring gate, the other end of the curved overflow channel is tangentially communicated with the slag ladle, and a vertical through hole is arranged at the center of the slag ladle. The spiral deslagging ladle containing the gas is used for deslagging and exhausting cold materials, impurities, mixed gas and the like near a casting pouring opening, the flowing speed of the aluminum liquid cooling materials is slowed down through the design that the plane of the overflow channel is gradually changed into a curve, the movement track of the cold materials is changed through the design of the cone-shaped conical surface on the upper portion of the deslagging ladle, and the cooling effect is improved. And the cold material spirally flows downwards along the inner wall of the slag ladle, and a cavity is formed in the slag ladle, so that gas is separated out from the cold material, and gas retained near a casting sprue gate is discharged.

The utility model discloses a tool bit structure of a vibrissa trimmer and the vibrissa trimmer adopting the tool bit. Belongs to the technical field of vibrissa trimming tools. The tool bit comprises an inner tool apron and an outer tool apron which are connected in a sleeved mode, and a plurality of outer tool bits are evenly distributed on the edge of the upper end of the outer tool apron in the circumferential direction at intervals. The upper end of the inner tool apron comprises a closed guide conical surface and inner tool bits which are uniformly distributed on the edge of the guide conical surface at intervals along the edge of the inner tool apron and are matched with the outer tool bits; vibrissa entering the upper end of the inner cutter is guided by the guide conical surface to enter a shearing part formed by the inner cutter head and the outer cutter head; the trimmer comprises a tool bit, and the tool bit is connected with a driving structure; the utility model aims to provide a nose hair trimmer tool bit structure and a nose hair trimmer adopting the tool bit, wherein nose hair is easy to lead in and the trimming effect is good. The device is used for trimming vibrissae.

The utility model relates to a metal hard sealing structure of a three-eccentric center butterfly valve. The metal hard sealing structure comprises a valve body, a valve seat, a valve plate, a metal sealing ring and a valve plate gland, an annular groove is formed in the edge of the outer end face of the valve plate, the metal sealing ring is arranged in the annular groove, and the metal sealing ring is pressed and fixed through the valve plate gland. A metal hard sealing pair is formed between the metal sealing ring and the valve seat, and sealing surfaces between the metal sealing ring and the valve seat are matched conical surfaces; the valve plate is of an asymmetric structure; axial eccentricity b exists between the center line of the valve plate and the center line of the valve shaft, radial eccentricity a exists between the axial middle section of the metal sealing ring and the rotating center of the valve shaft, and an eccentric angle phi exists between the center line of the conical angle of the conical surface and the center line of the valve body. According to the three-eccentric butterfly valve, the size parameters and the material distribution of the valve internals are optimized, so that the structural safety and the sealing performance of the three-eccentric butterfly valve are improved.

The utility model provides a gas-solid countercurrent fluidization heat exchange device. The gas-solid countercurrent fluidization heat exchange device comprises a barrel; a feeding pipe, a flow guide cone and a gas distributor are sequentially arranged in the barrel, the feeding pipe is used for conveying solid particles into the barrel, an upper conical surface is arranged at the upper end of the flow guide cone, a lower conical surface is arranged at the lower end of the flow guide cone, and the upper conical surface is used for enabling the solid particles input by the feeding pipe to disperse and slide downwards; a gas inlet pipe and a gas outlet pipe are arranged on the side wall of the barrel, the gas inlet pipe is used for conveying gas into the gas distributor, the gas distributor is used for guiding the gas to generate downward rotational flow motion, the lower conical surface is used for dispersing the returned gas flowing upwards to flow upwards, and the gas outlet pipe is used for conveying the gas subjected to heat exchange in the barrel to the next procedure; according to the device, gas and solid particles can be subjected to sufficient heat exchange, the heat exchange efficiency is greatly improved, meanwhile, countercurrent movement between the gas and the solid particles can be achieved, the gas flowing speed is increased, and the sectional area of the barrel is greatly reduced.

The invention relates to the technical field of resistance spot welding, in particular to a cement telegraph pole reinforcement cage automatic binding and welding integrated device based on PLC control. The device comprises a working rotating disc rotationally connected with a mounting support, a machining channel allowing the reinforcement cage to horizontally penetrate through is formed in the center of the working rotating disc, a conductive wheel and a pressing assembly are arranged on the same side of the working rotating disc, and the conductive wheel, the pressing assembly and the reinforcement cage form a closed conductive loop. When the diameter of the produced reinforcement cage is small, the axial component force applied to the spiral bar by the cylindrical pressing wheel is guided by the inclined plane of the groove, and forced friction is reduced. When the diameter of a produced reinforcement cage is large and the reset slope of the circular truncated cone pressing wheel presses a spiral bar, the acting direction of force is more deviated to the radial direction, the axial component force is reduced, and therefore the axial friction force is reduced. When the reset slope on the periphery of the round table roll welding wheel is in contact with the spiral rib, an inclined contact line along the conical surface is formed.

The invention provides a tank-type circuit breaker AC / DC voltage withstand test electric field improvement method and device and a storage medium, and the device comprises an epoxy resin composite insulator embedded with an aluminum alloy spherical shell, and the spherical shell achieves the equipotential connection with the wire outlet end of a circuit breaker sleeve through conical surface cooperation. And the curvature radius is optimally designed to transfer an electric field peak value to an equatorial region. The spherical shell is coated with a semi-conductive silicone rubber layer with resistivity distributed in a gradient manner, and the outer insulator forms a multi-stage umbrella skirt structure. During installation, dimensional tolerance self-adaptive compensation is achieved through a cam locking mechanism of the floating flange, and the belleville spring set provides axial sealing pre-tightening force. The method comprises four core processes of composite structure coaxial installation, gradient electric field regulation and control, dynamic sealing locking and electric heating state verification. According to the scheme, an electrode structure is reconstructed to suppress point discharge, space charge accumulation is blocked through dielectric layer resistivity gradient distribution, the creepage distance along the surface is prolonged through the multi-stage umbrella skirts, and the technical defect that the safety distance is shortened by a traditional grading ring is overcome.

A screw-cutting shear includes a shearing assembly including a shear base, a stationary blade, a shear lever, a moving blade, a reset spring, a cam, and a roller; and a driving assembly including an electric motor driving the cam to rotate and a speed reducer, a cam surface and a roller outer circular surface interacting to drive the shear lever to swing to drive the moving blade and the stationary blade to be fitted to shear off a screw, the cam surface and the roller outer circular surface being conical surfaces fitted with each other at an angle of X° so that when the cam is rotating, an axial force component is applied against the roller; under the action of the force, the shear lever moves axially along the bolt, so that the moving and stationary blades press against a sheared end face.

The utility model relates to the field of offshore oil and gas drilling, and discloses a mud line suspension system suitable for a high-temperature and high-pressure environment, an outer-layer casing hanger body is fixed on a riser through a first seating shoulder, a middle-layer casing hanger body is fixed on the outer-layer casing hanger body through a second seating shoulder, and the middle-layer casing hanger body is fixed on the riser through a second seating shoulder. The inner-layer casing hanger body is fixed on the middle-layer casing hanger body through a ratchet-shaped buckle; the upper portion of the outer-layer casing hanger body, the upper portion of the middle-layer casing hanger body and a lowering tool are sealed through a metal coating and a metal sealing ring, and the upper portion of the inner-layer casing hanger body and a lowering tool are sealed through an arc-shaped conical surface double-V metal sealing structure. Through reasonable structural layout, sealing arrangement, material selection and thread screwing length, the mud line suspension system can be well suitable for a high-temperature and high-pressure harsh environment, and the overall strength and the connection reliability are effectively improved.

The invention relates to the technical field of unmanned aerial vehicles, and discloses a lifting type unmanned aerial vehicle charging parking apron and a using method thereof.The lifting type unmanned aerial vehicle charging parking apron comprises a vertical rod, a platform body and a lifting mechanism driving the platform body to move in the height direction of the vertical rod, and the platform body is provided with a charging base used for being in butt joint with a charging plug at the bottom of an unmanned aerial vehicle; a cable used for supplying power to the charging base and a drag chain used for dragging the cable to move in the height direction of the vertical rod are arranged in the vertical rod, the charging base is in contact fit with the charging plug through a conical surface, and corresponding charging parts are arranged on an inner conical groove of the charging base and an outer frustum of the charging plug respectively. An electromagnet assembly used for providing magnetic attraction force for the charging plug is arranged in the charging base. The height can be adjusted according to actual requirements, the use flexibility of the unmanned aerial vehicle and the charging requirements of the unmanned aerial vehicle at different heights are ensured, it is ensured that the unmanned aerial vehicle can accurately complete docking in the landing process, and the charging efficiency is improved.

The invention relates to the technical field of hydraulic valves, and discloses an integrated safety hydraulic control one-way valve integrated with a tail beam telescopic cylinder, which comprises a valve body, a through main channel arranged in the valve body and a valve core assembly arranged in the main channel, the valve core assembly comprises a joint valve sleeve, a valve core spring, a valve core, a valve seat, a liquid inlet valve sleeve, an ejector rod spring and an ejector rod, the valve seat is arranged between the connector valve sleeve and the liquid inlet valve sleeve, the valve element is arranged in an inner cavity of the connector valve sleeve in a sliding mode, and the ejector rod is arranged on the axis extension line of the valve element. The valve element is of a primary-secondary valve structure and comprises a main valve element and a pilot valve element coaxially arranged in the main valve element, an axial guide inner cavity is formed in the center of the interior of the main valve element and comprises a damping cavity and a conical surface plugging cavity, and a pilot valve channel is formed in the wall of the damping cavity. The problem that a valve element of a traditional hydraulic control one-way valve rapidly moves at the hydraulic control opening moment to generate severe mechanical impact is solved, and the service life of a valve set is prolonged.

The invention provides a tool for chamfering an upper surface and a lower surface separately, intelligent chamfering equipment and a chamfering method, and relates to the technical field of chamfering of welding cutting. The cutter comprises a floating cutter handle, a cutter bar, a rotating sleeve, an upper cutter holder, a lower cutter holder, an upper pressing wheel, a lower pressing wheel, an upper depended wheel and a lower depended wheel, the upper cutter holder is sleeved with an upper pressing disc, the bottom face of the upper pressing disc is detachably connected with the rotating sleeve, a plurality of upper blades extend out of the top face of the upper pressing disc, and the side face of the upper depended wheel is a first conical face. The small end of the first conical surface is the top surface of the upper leaning wheel; the lower blades extend out of the bottom face of the lower pressing disc, the side face of the lower depended wheel is a second conical face, and the small end of the second conical face is the bottom face of the lower depended wheel. The lower blades extend out of the bottom face of the lower pressing disc, the side face of the lower depended wheel is a second conical face, and the small end of the second conical face is the bottom face of the lower depended wheel.

The invention relates to the technical field of fasteners, in particular to a threaded pulling nail and a preparation method and an installation method thereof. The thread drawing nail comprises a nail sleeve, a core rod, a forming sleeve, a lining and a mounting nut. The forming sleeve and the lining sleeve are arranged on the core rod in a sleeving manner; the nail sleeve and the mounting nut are screwed on the core rod; a threaded hole and a limiting hole are formed in the center of the nail sleeve; a nail sleeve locking shoulder is formed between the limiting hole and the threaded hole; the core rod comprises a clamping section, a first screw section, a second screw section, a limiting step section and a core rod head from top to bottom; external threads with the same shape are arranged on the peripheral surfaces of the first screw section and the second screw section, and a broken diameter groove is formed between the first screw section and the second screw section; the top surface of the head of the core rod is an inverted conical surface and forms a conical surface groove; a core rod stop shoulder is formed on the top surface of the limiting step section; the lower end of the forming sleeve abuts against the interior of the conical surface groove. After the blind rivet is riveted, the limiting step section can be inserted into the limiting hole, and the core rod locking shoulder and the rivet sleeve locking shoulder abut against each other to form limiting.