371results about How to "Outstanding and Beneficial Technical Effects" patented technology

The invention belongs to the technical field of foundation pit supporting for high-rise buildings, in particular to a foundation pit support construction method combining horizontal rotary jet-grouting soil bolting and bore concrete piles, which includes steps: firstly, constructing water-stop mixed piles and bored concrete piles according to a preset foundation pit; and secondly, performing soil excavation and soil bolting layer by layer and section by section. The foundation pit support construction method has the advantages that the foundation pit support constructed by the method is high in deformation control performance and stability and especially applicable to projections with high requirements on foundation pit deformation, and the method is applicable to mega-area foundation pit supporting in soft soil areas with failure of using internal support structures, limited slope reduction conditions and excavation depth limited within 15m, and meets the requirement that development and utilization of urban underground space continue to develop.

The invention belongs to the technical field of kitchen appliances, and particularly relates to an integrated cooker. The integrated cooker comprises a machine body and a range hood body; the range hood body comprises an air inlet, an air collecting box and a fan assembly; the air collecting box communicates with the air inlet; the fan assembly is arranged in the air collecting box; a volute air duct of the fan assembly extends downwards to the wall face of the bottom of the air collecting box and extends out of the bottom of the air collecting box to be rotationally provided with an air outlet base; and an air outlet is formed in one side of the air outlet base. According to the integrated cooker, the volute air duct extends downwards to the wall face of the bottom of the air collecting box and extends out of the bottom of the air collecting box to be rotationally provided with the air outlet base; the air outlet base is directly located on the outer side of the air collecting box, and the situation that a channel is located inside and occupies too much space is avoided; a through hole does not need to be additionally formed in the side edge of the machine body, and leakproofnessof the side face of the machine body is guaranteed; and meanwhile, the air outlet base is rotatably arranged, so that a user can conveniently adjust the air outlet direction according to actual needs,and humanization is achieved.

The invention belongs to the technical field of brushes, and particularly relates to a cleaning brush with a quantitative liquid replenishing function. One end of a brush handle is connected with a brush head, the brush head is provided with bristles, the brush head is hermetically connected with the brush handle, inner cavities of the brush head and the brush handle are mutually communicated, the brush head is provided with a one-way valve, liquid in the inner cavity of the brush head can be drained to the outside of the brush head via the one-way valve by the aid of pressure, an inflating device which inflates the inside of the inner cavity of the brush handle is disposed at the other end of the brush handle, the other end, which extends out of the brush handle, of a touch rod of the inflating device is connected with a pressure cap, and more than one hydrophilic water storage material is arranged among the bristles on the brush head or on one sides of the bristles. The cleaning brush has the outstanding technical advantages that liquid outlet can be controlled remotely, and the cleaning brush is convenient in operation, saves washing liquid or water, is energy-saving and environment-friendly, protects the skin of a user, is low in labor intensity and high in work efficiency, and is applicable to washing pots and pans or walls, doors, windows and glass.

The invention belongs to the technical field of plastic granulation and relates to an extrusion filter. The extrusion filter comprises a casing, a feeding connector arranged on the casing, a heating temperature control device and a material extrusion device; a discharging port of the material extrusion device is connected with an impurity filter with a filter screen; an impurity scraping and discharging device for scraping impurities on the filter screen into an impurity storage cavity and discharging the impurities to the outside of the impurity filter is arranged in an inner cavity of the impurity filter; the filter screen formed by a plurality of radially-arranged filtering holes is arranged on the side wall of the inner cavity of the impurity filter; and a discharging connector communicated with a discharging cavity at the outer side of the filter screen is arranged on the outer wall of the impurity filter. The extrusion filter has the benefits that the impurities generated in the granulation and the production of the extrusion filter can be cleared without machine halt; and the extrusion filter has the advantages of easiness in structure manufacture, high strength, uneasiness in blockage, long service life, high production efficiency and low production cost and is suitable for the granulation of waste plastics.

The invention belongs to the technical field of sewing machines, and relates to a full-automatic feeding device of a sewing machine. A separating mechanism, a clamping and lifting mechanism and a feeding mechanism are sequentially arranged on one side of a table plate of the sewing machine, wherein the separating mechanism gradually separates to-be-sewn cloth one by one; the clamping and lifting mechanism clamps and lifts the to-be-sewn cloth separated by the separating mechanism; the feeding mechanism transfers the to-be-sewn cloth lifted by the clamping and lifting mechanism to a position above a needle plate; a plurality of position sensors are arranged on a transfer track of the to-be-sewn cloth; and a controller receives position signals of all the position sensors and controls sequential actions of the mechanisms. The full-automatic feeding device has the advantages that labor intensity is low, laying speed is high, and positions of laid cloth are standard, so that work efficiency is high, standard degree of sewn products is high, production cost is low, automation of a cloth sewing process can be realized by the device, and the full-automatic feeding device is applicable to various types of sewing machines.

The invention belongs to the technical field of sewing machines, and particularly relates to a sewing machine based on an automatic template split synchronizing wheel apparatus. The sewing machine comprises a sewing machine body, the sewing machine body is provided with a drag wheel lifting and pressing mechanism and a lifting and pressing foot mechanism. A housing rear cover plate of the sewing machine body is provided with a lifting and pressing drag wheel electromagnet, a lifting and pressing foot electromagnet is disposed in the housing, and the lifting and pressing drag wheel electromagnet and the lifting and pressing foot electromagnet are used for respectively controlling the drag wheel lifting and pressing mechanism and the lifting and pressing foot mechanism to act. At the same time, a knee-operated lifting push rod is used for individually controlling the drag wheel lifting and pressing mechanism to act, so that the lifting height of a drag wheel can be adjusted at will, a cloth-dragging wheel can be lifted from a presser when a corner is sewed, and the presser can always pressed the cloth, the cloth can be normally sewed, the sewing performance can be raised, and the sewing effect can be ensured.

The invention belongs to the technical field of biological filter beds, and particularly relates to a multi-stage aerobic-anaerobic compound biological filter bed, comprising a water inlet pipe and more than two stages of filter beds; the height of a liquid level of each stage of the filter bed is gradually reduced and each filter bed is divided into a water inlet groove, a filtering chamber and a water outlet groove by rectification walls; each filtering chamber is filled with filler layers; the grain diameters of fillers of the filler layers at the two sides are great and the grain diameters of the fillers of the middle filler layer are small; the grain diameters of the fillers of the middle filler layer are sequentially reduced according to the stages of the filter beds; a water outlet end of the water inlet pipe is arranged at the bottom of the water inlet groove of the foremost stage of the filter bed and the bottoms of the water outlet grooves of the upper and lower stages of the filter beds are communicated through a siphon; the bottom of the water outlet groove of the final stage of the filter bed is connected with a water discharging groove; the middle filler layer is internally provided with a ventilated vertical pipe, a ventilated main pipe and a ventilated branch pipe; the ventilated branch pipe is provided with air vents at intervals and plants which can degrade pollutants are planted at the upper parts of the filler layers. With the adoption of the structure, the multi-stage aerobic-anaerobic compound biological filter bed provided by the invention has the advantages of small occupied area, convenience for construction, lower cost, wide application range and the like.

The invention belongs to the technical field of grinders, and relates to a full-automatic numerical control screw tap thread grinder. A rear support plate moving along a longitudinal slide rail is arranged at the rear side of a work table of a grinder base, a grinding wheel spindle is arranged at the front side of the rear support plate, driven by a power device to rotate and provided with a screw tap relief-grind grinding wheel, a sliding block moving along a vertical slide rail is arranged on the portion, located at the rear side of the grinding wheel spindle, of the rear support plate, and a diamond wheel is installed on a diamond rotating shaft arranged on the sliding block; a front support plate moving transversely is arranged at the front side of the work table, a swing tray is hinged to the front support plate, an indexing workpiece clamp is arranged at one side of the swing tray, a tailstock centre moving along a transverse slide rail is arranged at the other side of the swing tray, a swing shaft driven by the power device to rotate and a cam installed on the swing shaft are hinged to the front side of the front support plate, and actions of the power device are controlled by a controller program. The full-automatic numerical control taped thread grinder has the advantages that the screw tap relief-grind grinding wheel is high in finishing accuracy, clamping frequency is reduced, the accuracy and efficiency of screw tap machining are improved, and the grinder is applicable to the field of full-automatic numerical control screw tap thread grinders.

The invention discloses a fully-automatic pencil sharpener assembly machine which allows a blade to be placed on a pencil sharpener shell accurately. The fully-automatic pencil sharpener assembly machine comprises a blade feeding device. The lade feeding device comprises a first support, a supporting plate, a blade frame, a blade push mechanism, a second support, a first linear reciprocating motion mechanism, a second linear reciprocating motion mechanism and a blade taking device capable of attracting the blade. The second linear reciprocating motion mechanism is mounted at the output end of the first linear reciprocating motion mechanism, the first linear reciprocating motion mechanism is mounted on the second support, the second support is fixedly connected with a rack, and the first linear reciprocating motion mechanism is arranged to be perpendicular to the second linear reciprocating motion mechanism. The blade taking device is driven to carry out reciprocating motion between the supporting plate and a clamp through one linear reciprocating motion mechanism of the second linear reciprocating motion mechanism and the first linear reciprocating motion mechanism of the blade feeding device, and the blade taking device is driven to be lifted up and dropped down through the other linear reciprocating motion mechanism in the blade feeding device.

The invention belongs to the technical field of fire-fighting equipment, relating to an emergency life-saving device for firefighting. The emergency life-saving device for firefighting comprises a rope deploying and retracting device, wherein one end of the rope is fixed on an axis in a shell, the other end is introduced out of the shell and tied on a multi-claw hook of a multi-claw throwing gun, the axis is provided with a driving device for manually and electrically driving the axis to rotate and a brake device for the axis, a gear shifter is arranged between the axis and the driving device, the lower end of the shell is connected with a seat basket for being sat by people or a safety rope for being tied, the multi-claw throwing gun can throw the multi-claw hook to 20-200 meters through a projectile or a mechanical ejection device, the lower end of the cylinder of the multi-claw throwing gun is provided with a rope temporary storage cylinder, and part of the rope under the multi-claw hook is sequentially overlapped in the rope temporary storage cylinder. The emergency life-saving device for firefighting has the advantages of simple structure, small size, safety and reliability, easiness and rapidness in climb of high-rise buildings, and being applicable to rescue operation of armed police and firefighters or self-rescuing operation of residents.

The invention discloses a smart unmanned shared home service robot. At least a base seat of an automatic travel system of unmanned driving is arranged. The smart unmanned shared home service robot also includes a main control module, a communication module, an environment sensor, a liquid crystal display screen, a collision sensor, a speech interaction system, a human body pyroelectric-sensor, a photoelectric sensor, a smoke sensor, a camera and a multi-function module, and is used for forming one or more items of a home security-monitoring function system, a home electrical-apparatus management function system, a family housemaid function system, a family doctor function system, a home entertainment accompanying function system and a home fire protection management control function system. The robot realizes multi-function integration, carries out omnibearing home service, can be effectively promoted, and can also reduce economic pressure of a user.

The invention relates to the technical field of electric tools, in particular to a wall polisher. The wall polisher comprises an operating handle, a motor and a polishing head. The polishing head comprises a top cover, a base and abrasive disc assemblies. A transmission mechanism for transmitting the torque of the motor to the abrasive disc assemblies is arranged between the top cover and the base. An output shaft of the transmission mechanism is an eccentric shaft or a concentric shaft. An abrasive disc of each abrasive disc assembly is installed at the lower end of the eccentric shaft or the concentric shaft. The base is internally provided with a rotating disk, one side of the rotating disk is provided with a shifting handle, the rotating disk is provided with one or more limiting holes, the top cover is fixedly provided with a positioning rod stretching into the limiting holes, and the limiting holes can clamp or loosen the positioning rod through the rotation of the rotating disk. According to the wall polisher, the two different abrasive disk assemblies are usually prepared, the output shaft of the transmission mechanism of one abrasive disk is the eccentric shaft, the other output shaft of the transmission mechanism of the other abrasive disk is the concentric shaft, different abrasive disk assemblies can be rapidly switched, and therefore the wall corner can be polished very conveniently.

The invention belongs to the technical field of stools, and relates to a movable lift type surgical observing stool. A lift device for controlling a lifting platform to ascend and descend is arranged at the middle back part of a box body; and rollers which can extend upwards and downwards are arranged at four corners of the bottom of the box body. The movable lift type surgical observing stool has the advantages that the occupying space is narrow; and the stool is convenient to move, fold, clean up and store and convenient for interns to view a process in which a surgeon performs an operation; and moreover, the movable lift type observing stool has a simple structure and is low in production cost and suitable for being applied to hospital surgery.

The invention particularly discloses a smart non-living food and seafood product transporting and selling vehicle and a sharing system and a business model. the vehicle at least comprises a vehicle chassis and a vehicle body, wherein that vehicle body is provided with a plurality of warehouse for storing raw food and seafood products, a section of the warehouse is communicated with a constant temperature and humidity module, the constant temperature and humidity module comprise a mixed air container, a refrigeration system, a humidification system and a control system connected with the systems; A temperature sensor and a humidity sensor, an oxygen supply system and a wat supply system are respectively arranged in that mix fume hood; a battery management module and a voice interaction module are included; The battery management module comprises a battery pack, a charging module, a charging / discharging chip and a battery monitoring chip.- Through the data exchange between mobile devicesand intelligent terminals and between cloud servers, it can be used not only as a transportation and circulation of goods, but also as a mobile goods sales vehicle, which creates a new business modelthat combines sales and logistics and interoperability.

The invention provides a blade electric vehicle transmission with a novel lubrication structure, and belongs to the technical field of transmissions. The problem that an existing structure lubrication manner is not effective enough is solved. The blade electric vehicle transmission comprises a transmission case. A temporary oil storage box is arranged on the top side in the transmission case, lubricating oil is stored on the bottom side in the transmission case, and the temporary oil storage box is provided with a plurality of lubricating oil dripping holes. A transmission input shaft and an intermediate coupling shaft which are connected through a gear are located on the lower side of the temporary oil storage box and above the lubricating oil face. An intermediate coupling shaft gear is connected with a differential mechanism gear. The lower side of the differential mechanism gear is immersed in lubricating oil. The differential mechanism gear rotates, so that the lubricating oil on the bottom side of the transmission case is splashed into the temporary oil storage box, and the lubricating oil lubricates various parts of the transmission through the lubricating oil dripping holes and then flows back to the bottom side of the transmission case to form a cycle. The blade electric vehicle transmission has the beneficial effects of being complete in lubrication, moderate in oil amount, capable of saving energy, environment-friendly and the like.

The invention belongs to the technical field of wall decoration parts, and relates to an installing hanging assembly of veneer materials. The installing hanging assembly of the veneer materials comprises an L-shaped hanging part I which can be installed on a wall or a kneel or a supporting frame, a hanging part II which can be installed on the inner surface of a veneer and on a cross portion of the hanging part I, and a hanging part III connected with the upper end of the hanging part II and the hanging part I, wherein after the hanging part III is fixedly connected with the upper end of the hanging part II, the hanging part III is in elastic connection with a bending portion of the inner side of the hanging part I, and is in positioning connection with the cross portion of the hanging part I in a selective width mode, the outer side of the hanging part II extends downwards to form a bending portion, a pothook which can be hung on the veneer is arranged at the lower end of the bending portion of the hanging part II, a bending portion used for positioning or connecting the veneer is arranged at the outer end of the hanging part III, and an installation hole is formed in the upper side of the bending portion of the inner side of the hanging part I. The installing hanging assembly of the veneer materials has the advantages of being capable of installing thin veneer materials, high in firmness, simple and rapid in construction, capable of saving materials, low in production cost, flat in wall surface to be decorated, and suitable for being used as hanging parts for the veneer materials on indoor and outdoor walls.

The invention belongs to the technical field of nanoscale metal particle production, and relates to a device for achieving continuous mass production of high-purity nanoscale metal particles through circulation cooling. The device comprises a furnace body, a crucible in the furnace body, a plasma spraying gun used for heating and evaporating metal in the crucible, and a collector for collecting metal powder produced in the crucible. A gas-solid separator is arranged in the collector. A pipeline communicating to an air outlet of the collector communicates with a vacuum pump, an exhaust fan and a heat exchanger and then penetrates through the furnace body to communicate with an inner cavity of the crucible. A discharge pipe of a storage barrel and a feeding pipe of the collector penetrate through the furnace body to communicate with the inner cavity of the crucible. The feeding pipe communicates with a nano particle grower. A branch pipeline arranged on a pipeline for communicating the heat exchanger and the inner cavity of the crucible stretches into an inner cavity of the nano particle grower and communicates with a cooling pipe with an inert gas spray outlet. The device has the advantages that metal steam can be rapidly cooled after entering the nano particle grower, and the size of metal particles is controlled to be below 20-250 nm.

The invention belongs to the technical field of fruit processing and relates to a separating device and a preparation method for sweet orange sacs. The separating device comprises a screen type conveyer belt which is driven by a power unit and provided with a feeding hopper at the head, a garbage collecting tank at the tail, a sac collecting tank at the lower portion and high-pressure water pipes which are arranged on the upper side and provided with jet holes and a jet flow angle controllers, wherein the high-pressure water pipes are parallelly connected and converged, then connected in a series with a flow controller, and communicated with a liquid outlet of a high-pressure pump, and the bottom of the sac collecting tank is communicated with a filter, a buffer tank and a liquid inlet of the high-pressure pump. The preparation method for the sweet orange sacs includes the steps of classification, blanching for peeling, sac coating removal, sweet orange juice production, sac separation, mixing filling and the like. According to the device and the method, the separating effect is good, the practicability is high, and the production process is simple; produced sweet orange sac grains are good in completeness and high in nutritive value; and the device and the method are suitable for separation of the sweet orange sacs and preparation of sweet orange sac beverage.

The invention belongs to the technical field of a wind power and waterpower generation and relates to a hybrid wind power and waterpower generation device. The hybrid wind power and waterpower generation device comprises an upper storage reservoir, a lower storage reservoir lower than the upper storage reservoir, water conveying pipes communicating the upper storage reservoir with the lower storage reservoir, and a waterpower generation device arranged on the water conveying pipe, wherein a wind power generation device is arranged on one side of the upper storage reservoir, and electricity generated by the wind power generation device is input into a variable-frequency motor through a power transmission line; the variable-frequency motor drives a water suction pump to pump water; a water inlet of the water suction pump is communicated with the bottom in the lower storage reservoir through a water conveying pipe; and a water outlet of the water suction pump is communicated with the water conveying pipes between the upper storage reservoir and the lower storage reservoir through the water conveying pipe. The hybrid wind power and waterpower generation device disclosed by the invention has the advantages that a disordered inferior power supply of wind power generation is changed into a high-quality power supply needed in a power utilization peak of a power grid; the variable-frequency motor is applicable to a wind power generator or a wind power generator set to generate a fluctuated power supply, so that wind energy in renewable energy resources can be sufficiently utilized; a power grid structure can be optimized, a peak clipping and valley filling capability of the power grid is improved, and the total operation cost is effectively reduced; and therefore, the hybrid wind power and waterpower generation device is suitable for middle-sized and small-sized hydraulic power stations.

The invention belongs to the technical field of seed preservation and relates to a Dendrobium officinale seed preservation device and method. The device comprises a storage box and seed collection bottles; the seed collection bottles mounted in the storage box are used for storing Dendrobium officinale seeds. The Dendrobium officinale seeds are collected in the seed collection bottles. After mouths of the seed collection bottles are covered with bottle caps, and the outer surface, connected with the bottle cap, of each mouth is provided with a breathable seal film; the seed collection bottles are mounted in holes of bottle racks. The method includes: sterilizing tools, sterilizing capsules, collecting seeds and preserving at low temperature. The Dendrobium officinale seed preservation device and method has the advantages that the device is reasonable in structural design, the method is scientific and reliable, preservation time is long, survival rate is high, the requirements of Dendrobium officinale for perennial tissue culture can be met, and the device and method is applicable to collection and storage of like seeds.

The invention specifically discloses a smart shared computer and office equipment and a shared system and a business model thereof; the smart shared computer and office equipment at least comprises achassis, a vehicle body, a central controller and a communication module; the chassis is provided with an automatic driving system for unmanned driving; the vehicle body has a computer host and a display device connected with same; the computer host and the display device are connected with a central processor; the central processor is used for recording and analyzing user information parameters,and making overall management of various orders of the smart shared computer and office equipment; the communication module is used for realizing information transmission between the shared computer and office equipment end and a client end and a cloud service platform; a power supply source and a battery capacity management module are also included. The internet of things+ and the unmanned automatic driving technology are combined; shared systems of normal computers and fax equipment commonly join the shared business commercial trends, thus integrating resources and effectively using same, and promoting development.

The invention belongs to the technical field of a detection device, and relates to a sealing property detection device for a submersible pump. A pressure tank body and a guide bar at the outside of the tank body are fixed on a pedestal of a box; a tank cover of the pressure tank is slidingly arranged on the guide bar which is arranged between a top board and the tank body, and can be lifted and dropped driven by a cylinder; the tank body and the tank cover are locked together through an automatic locking device; the lower side of a vertical mounting board fixed on the bottom surface of the tank cover is provided with a supporting plate, a submersible pump positioning clamp and a bulkhead; the bulkhead is driven by the cylinder to move in the lateral direction and is used for blocking an oil chamber detection joint of the submersible pump; the middle part of the tank cover is provided with a bulkhead which is driven by the cylinder to move up and down and is used for blocking a motor chamber detection joint for the submersible pump; and the side wall of the tank cover is provided with a cable slot and a cable sealing locking block. The sealing property detection device for a submersible pump has the advantages of being accurate in the control motion, being high in detection precision, having more detection items, and being suitable for high accuracy detection of the submersible pump.

Belonging to the technical field of logistics distribution, the invention specifically discloses an intelligent unmanned cooked food and drink transporting and vending vehicle sharing system and a business model established thereon. The intelligent unmanned cooked food and drink transporting and vending vehicle sharing system includes a cloud service center, several intelligent unmanned cooked food and drink transporting and vending vehicles and terminal equipment distributed to users. The intelligent unmanned cooked food and drink transporting and vending vehicle at least includes a chassis and a vehicle body, and the vehicle body is equipped with a warehouse for placing articles. The vehicle also includes a battery capacity management module and a voice interaction module, and the battery capacity management module includes a battery pack, a charging module, a charge and discharge chip and an electric quantity monitoring chip. Through data exchange between mobile devices and intelligent terminals and cloud servers, besides goods transportation and circulation functions, the vehicle also can be used as an aritcle selling vehicle, and a novel sales and logistics combined and interconnected business model is created.

The invention relates to a novel pressurizing flow-increasing water storage device. When the pipeline pressure and the flow are not sufficient, the device can increase the flow and provides a fluid of the high pressure simultaneously, the pressure fluctuation and the flow variation are low during discharging of the fluid, and the device can be adapted to high-pressure and low-pressure working environments. The novel pressurizing flow-increasing water storage device comprises a cylinder, a piston assembly, a spring and a spring supporting portion, wherein the cylinder is provided with an inner cavity and a water inlet / outlet, the piston assembly comprises a piston and a sealing ring, the piston is arranged inside the inner cavity and is matched with the inner cavity, a first groove is arranged on the piston, the sealing ring is installed on the first groove, the moving sealing is formed between the piston and the cylinder through the sealing ring, the piston assembly separates the inner cavity of the cylinder into a first chamber and a second chamber, the first chamber which is communicated with the water inlet / outlet and the piston assembly form an energy storage chamber, and two ends of the spring which enables the piston assembly to move towards the water inlet / outlet are connected with connection portions of the piston and the spring respectively.

The invention belongs to the field of seal ring mounting instruments, and particularly relates to a mounting device of a hole seal ring and an assembly machine of the hole seal ring. The mounting device comprises a main body, and an axial through hole is formed in the main body; a pull rod is movably arranged on the axial through hole; a clamping groove used for arranging the seal ring in a sleeving manner is formed in the main body; and a hook used for hooking the seal ring is arranged on the pull rod. The assembly machine of the hole seal ring comprises a rack, and a feeding mechanism used for seal ring feeding, a loading mechanism used for mounting the seal ring, a transfer mechanism used for transferring workpieces, and a discharge mechanism used for discharging the workpieces, which are mounted on the rack, wherein the mounting device used for hole seal ring filling is mounted on the loading mechanism.

The invention relates to a production process of a sliced type centrifugal cast iron piston ring, belonging to the technical field of piston rings. The production process of the slice type centrifugal cast iron piston ring comprises the following steps of: (1) casting a cylindrical blank of the piston ring; (2) turning an excircle and an incircle of the cylindrical blank according to the dimensions of the incircle and the excircle of the piston ring; (3) slicing the cylindrical blank with the incircle and the excircle turned into rings according to the thickness dimension of the piston ring; (4) opening the rings manufactured in the step (3) to form piston ring semi-finished products according to the piston ring dimensions needed by a cylinder diameter on a special opening machine tool for the piston ring; and (5) sleeving the piston ring semi-finished products opened in the step (4) on a shaping cylinder for ellipse shaping. The production process disclosed by the invention has the technical advantages that after centrifugal casting, incircle and excircle turning, opening and heat shaping are adopted, the piston ring has the rigidity of HRB 95-HRB 104 degrees, high material bending strength, stable elasticity, high surface abrasion resistance and long practical life; in addition, the production process disclosed by the invention has the advantages of high production efficiency and low cost and is suitable for manufacturing the piston rings with different specifications.

The invention belongs to the technical field of sewing machines and particularly relates to a method and a device for shortening a flat sewing machine trimmed thread that the needle pitch is adjusted close to zero when a thread is trimmed. The structure of the device is that an air cylinder is fixed on an air cylinder mounting plate, the outer end of an air cylinder piston rod and one end of a connecting rod are in hinge connection, the other end of the connecting rod and one side of a sliding plate are in hinge connection, the sliding plate is fixedly connected on a feeding swing plate seat, one end of a feeding-pouring connecting rod and a feeding regulator are in hinge connection, the other end of the feeding-pouring connecting rod and one side of the feeding swing plate seat are in hinge connection, the air cylinder piston rod drives the connecting rod in a retracting mode, the connecting rod pulls the sliding plate, the sliding plate is fixed on the feeding swing plate seat, the feeding regulator is driven through the feeding-pouring connecting rod, the needle pitch is adjusted between 0+1mm and 0-1mm, two thread ends remained after sewing is finished are nearly in the same needle hole and form a similar interlocking shape, neither one of the two thread ends is prone to falling off when any thread is pulled, and thus firmness and attractiveness are achieved.

The invention belongs to the technical field of mechanical movement mechanism, and relates to a mechanical movement conversion device. A first shaft, a second shaft and a third shaft which are parallel to each other and sequentially disposed are arranged in a box, three primary gears which are meshed with each other are respectively arranged on the first shaft, the second shaft and the third shaft, a rocker arm is fixedly connected onto the first shaft or the primary gear on the first shaft, hollow shafts are respectively sleeved on the second shaft and the third shaft, secondary gears and tertiary gears are respectively fixedly connected onto the hollow shaft, each tertiary gear and the corresponding secondary gear rotate coaxially, a one-way rotary gear which is in meshed transmission with the two tertiary gears simultaneously is fixedly connected onto an output shaft disposed between the two tertiary gears, and pawls are respectively disposed on the primary gears which are fixedly connected onto the second shaft and the third shaft and drive the secondary gears to rotate when the primary gears rotate anticlockwise or clockwise. The mechanical movement conversion device has the advantages that conversion of movement modes is accurate and reliable, energy loss is low, conversion efficiency is high, and the mechanical movement conversion device is applicable to various mechanical equipment required conversion of reciprocating movement or oscillation into circumferential movement.

The invention relates to the technical field of two-needle machines and especially relates to a corner sewing method of a two-needle sewing machine. The method comprises the steps that (1) the degree number beta of a corner and a turning direction of a thread track are input in an operation interface when turning is needed during sewing; (2) a control unit computes a walking length D of a walking needle rod; (3) a starting instruction is input, the control unit makes the two needle rods separated automatically, the separated needle rod stops working, the working needle rod keeps on walking for the length D, and then the machine needle is paused, and a press foot is lifted; (4) a sewing fabric is rotated by the angle beta with the working needle rod as the center, the staring instruction is input, the press foot moves downwards and presses the fabric, and the working needle rod keeps on walking for the length D; and (5) the control unit resets the two needle rods, and the needle spacing is automatically recovered to D1. According to the invention, the walking length D of the working needle rod as well as the walking needle spacing D2 and the needle number X within the walking length D of the walking needle rod can be computed automatically according to a current needle spacing D1 and a turning angle, so corner turning becomes more flexible and the method has market application prospect.

The invention belongs to the technical field of freshness preservation of fish products, and relates to a physical freshness preservation method of uncooked fish meat or fish fillets. The physical freshness preservation method comprises the steps as follows: firstly, innocuous and unpoisonous fresh fish which can be eaten crudely are selected and cultivated for 1-2 days without food; secondly, the fresh fish is killed, processed, electrically stunned, subjected to gill removing and bloodletting, and manufactured into a non-frozen vacuum-packed fish product at the temperature of zero DEG C in a special sterile low-temperature workshop; and thirdly, the manufactured vacuum-packed fish product is placed in a bubble chamber with an ice bag at the temperature lower than zero DEG C for freshness preservation. The physical freshness preservation method of the uncooked fish meat or the fish fillets has the advantages as follows: the fish product is nutrient-rich, safe, hygienic, good in taste and convenient to transport, the freshness preservation time is longer than 72 hours, the freshness preservation belongs to purely physical and anhydrous freshness preservation, any chemical substances are not added, and the method is applicable to processing and freshness preservation for uncooked fish.