41results about How to "Well-proportioned structure" patented technology

The invention discloses a hybrid breeding method for Jianghuai black pigs. The method comprises the steps that bred high-yield Huai pigs serving as female parents and bred high-yield Berkshire pigs serving as male parents are hybridized for the first time to produce a first-filial generation sow group Berkshire-Huai binary species, and excellent sows of the produced hybrid offspring are selected and reserved; the excellent Berkshire-Huai binary sows obtained in the first step and the black Berkshire male parent pigs are hybridized for the second time, and the produced offspring is Berkshire-Huai zero-generation pigs of a new strain, wherein the Berkshire-Huai zero-generation pigs have 25% of Huai pig lineage and 75% of Berkshire pig lineage.

The invention relates to the technical field of lithium batteries, in particular to an improvement of a pole ear leading-out structure of a coiling type lithium battery. The safe coiling type lithiumbattery comprises a battery casing; a coiling core is arranged in the battery casing, wherein the coiling core is formed in such a way that a positive pole carbon piece and a negative pole lithium piece are isolated by a membrane barrier and are mutually coiled; the coiling core and a battery explosion-protection bottom are provided with bottom membranes, the lower end of the battery casing and anexplosion-protection valve are sealed by welding, a four-fluorine cover membrane is arranged between the coiling core and a cover cap, the upper end of the battery casing and the cover cap are sealedby welding, a negative pole leading-out pole ear and a positive pole leading-out pole ear of the battery are respectively led out to both ends of the battery, the positive pole leading-out pole ear which is led out from a current collection body of the positive pole carbon piece is connected with a positive pole column arranged on the cover cap, and the negative pole leading-out pole ear which isled out from the negative pole lithium piece is connected with the battery casing at the lower end of the battery. The structure can enable the battery to have stable internal structure and dispersive heat source, realize the favorable opening of the explosion-protection valve and the internal pressure balance of the battery and enhance the safety of the battery obviously.

The invention relates to a subway car end underframe structure. The subway car end underframe structure comprises a front-end anti-creeper assembly, a crushing box assembly, a coupler seat assembly and a sleeper beam assembly. The subway car end underframe structure is characterized in that the crushing box assembly is welded between the front-end anti-creeper assembly and the coupler seat assembly; connecting beams are arranged on the two side parts between the front-end anti-creeper assembly and the coupler seat assembly; a buffer beam assembly is connected between the coupler seat assemblyand the sleeper beam assembly; the tail end of the end part of the underframe is a main cross beam; and a longitudinal beam assembly is connected between the sleeper beam assembly and the main cross beam; and the front-end anti-creeper assembly, the crushing box assembly, the coupler seat assembly, the buffer beam assembly, the sleeper beam assembly, the longitudinal beam assembly and the main cross beam are sequentially connected into a whole, and the two sides of the whole structure and carbon steel side beam assemblies are welded into a closed structure. The subway car end underframe structure is exquisite and concise, the arrangement of the cross beam and the longitudinal beams is reasonable, and on the premise of ensuring the continuity of force transmission, the installation space and maintainability of other systems are met as far as possible; through the reasonable arrangement of reinforcing parts, the continuity of force transmission is realized through various connectors, andstress concentration and excessive local stress are avoided; light weight requirements are met; and the operability of replacement is ensured, and the maintainability is good.

The invention discloses a continuous extrusion method for a lead frame material of a shallow wheel trough. The continuous extrusion method comprises the following steps that (a) billets are pressed into a shallow wheel trough extrusion wheel by a shallow wheel trough compaction wheel; (b) the billets pressed into the shallow wheel trough extrusion wheel rotate with the shallow wheel trough extrusion wheel and are subjected to plastic deformation under the driving of a fraction force; (c) after forwards moving to a shallow wheel trough baffling block, the billets enter a shallow wheel trough cavity through a shallow wheel trough cavity inlet and are subjected to expansion deformation; (d) after being subjected to the expansion deformation, the billets are extruded through a mold in the shallow wheel trough cavity, so as to form a product. The continuous extrusion method and an extrusion tool for the lead frame material of the shallow wheel trough have the advantages that the service life of the mold is prolonged, and meanwhile, due to the decrease of the difficulty of the expansion deformation, deformed metal can rapidly enter the cavity and can be rapidly extruded from the mold, so that the production energy consumption of the unit product is reduced; secondly, a shallow wheel trough extrusion device with the same main shaft diameter can be used for producing products having larger widths and sections.

The utility model relates to a chain-type steel pipe transverse section feeding device, which relates to the field of steel pipe production. It includes a machine base on which fixed beams, rotating beams, a drive shaft and multiple drive shafts arranged in parallel are arranged on the machine base, and sprockets connected by chain transmission are respectively installed on the drive shaft and the drive shafts; One end of the transmission shaft is connected to the rotating beam through a rotating arm, and a plurality of V-shaped free stingers are evenly distributed on the top of the rotating beam, and a plurality of V-shaped fixed stingers are evenly distributed on the top of the fixed beam, and two adjacent fixed stingers The stingers are correspondingly arranged on the rotation track of a free stinger. The invention has no rotation and axial deviation during the horizontal transportation, and also has the advantages of simple structure and convenient maintenance. At the same time, according to the number of free stingers and fixed stingers on site, the cost of construction is low.

The invention discloses a novel spinning pen. The spinning pen comprises a pen holder, a spinning part, a sealing assembly and a balancing assembly. The pen holder comprises a ringlike part and two casing rods, wherein the casing rods are symmetrically distributed at the two sides of the ringlike part. The casing rods are identical in size and shape. An included angle exists between the central axis of the ringlike part and the central axis of each casing rod. One end of each casing rod is opened. The casing rods are used for containing a refill. A cavity is formed in the axis direction of the ringlike part and used for mounting the spinning part therein. The sealing assembly comprises a first sealing part and a second sealing part. The first sealing part is connected with the spinning part and seals one end of the cavity, and the second sealing part seals the other end of the cavity and is connected with the first sealing part. The balancing assembly is mounted on the outer side walls of the casing rods in a sleeving manner. According to the novel spinning pen, the spinning part is matched with the sealing assembly, the sealing assembly is controlled through fingers, so that the spinning part is made to spin, and thus spinning of the pen holder is achieved; and the spinning pen is stable in integral structure, good in balance degree and capable of spinning for a long time.

The invention discloses a Berkshire pig breeding method. Boars and sows meeting breeding requirements of varieties and excellent indexes are built into a core group, paternal indexes of the boars TLIare higher than 115, breeding indexes of the sows are higher than 105, and the body appearance of a bred Berkshire pig is characterized in that the head size of the Berkshire pig is moderate, the Berkshire pig is compact in physique and uniform in structure, and a hair color meets six-white characteristics. The body quality of the bred Berkshire pig is characterized in that body lean meat rate is63.5% or more, a mean value of the fat thickness of a living body is 17mm or less, eye muscle area is 45 square centimeter or more, intramuscular fat reaches 3.2% or more, and meat quality is excellent. The reproductive performance of the bred Berkshire pig is characterized in that the number born alive is 8.5, the number of weaning alive is 7.5, and 26-day-old weight of weaning litter is 58kg.

The invention can extend the working life of fluorescent lamp. The twist tungsten filaments consists of double assistant twist tungsten filaments that is formed by two assistant tungsten filaments, and a main tungsten filaments rounding the above double assistant twist tungsten filaments.

The invention discloses a multifunctional suitcase which comprises a suitcase body. A pull rod is parallelly arranged on the top of the suitcase body and comprises a pull rod handle and a telescopic rod body, a front cover capable of being opened and closed is arranged on the front face of the suitcase body, file bag partition plates are uniformly distributed inside the suitcase body, a drawer is arranged at the bottom inside the suitcase body, the drawer and the file bag partition plate at the lowest layer form a closed space, a support is arranged between the front cover and the file bag partition plates, a rotating shaft is arranged on one side of the support, a rotating shaft sleeve is arranged on a rotating rod fixed in the suitcase body in a sleeving mode to achieve rotation of the support, a soft bag plate is arranged on the front face of the support, and the soft bag plate is connected with the support through a zipper to achieve the purpose that the soft bag plate covers the support. The multifunctional suitcase is attractive in appearance and symmetrical in structure, the internal space can be divided reasonably as needed, the degree of freedom of operation is extremely high, the multifunctional suitcase has a good market prospect, and the problems that an existing suitcase is single in storage function, focuses on appearance design, neglects reasonable application of the internal space of the product and the like are solved.

The invention belongs to the technical field of nano-material assembly, and relates to a preparation method of a porous carbon-carbon nano-tube hollow fiber membrane capable of generating hydroxyl radicals under an electrochemical strengthening effect. The preparation method comprises the following steps: 1, preparing a porous carbon precursor Zif-8; 2, preparing porous carbon; 3, acidifying the carbon nanotube in a concentrated acid solution to introduce a hydrophilic group; 4, forming a uniformly mixed spinning solution; 5, performing wet spinning operation to form a hollow fiber membrane; 6and 7, respectively removing the organic solvent and PVB to form the target material. The preparation process is simple, expensive equipment is not needed, and the method is flexible and controllable. Under the electric auxiliary effect, H2O2 is generated through reduction of O2; then, hydroxyl radicals are generated through coupling of H2O2 and Fe <2+> and are used for degrading pollutants; in addition, Fe <3+> is reduced into Fe <2+> through electric assistance. Therefore, the method achieves effective circulation of Fe <2+>/Fe <3+>.

The invention relates to an office or schooling apparatus, and particularly relates to a high-grade roller pen for office or learning. The high-grade roller pen is further improved as to the prior art, particularly to the problems of comfort level, beautiful degree and reading fluency of the pen in the prior art. The high-grade roller pen comprises a pen cap, a pen body, a nib sleeve and a pen core, wherein the pen cap comprises a first taper pipe structure of which the small end is connected with the pen body and a pen clip fixedly connected with the large end; the pen body comprises a second taper pipe structure of which the large end is connected with the small end of the pen cap, and a third taper pipe structure of which the small end is fixedly connected with the taper pipe structure, and the pen cap and the pen body, the pen body and the nib sleeve, and the nib sleeve and the pen core are connected through threads. The high-grade roller pen is greatly improved in the aspects such as arc and level structures of the pen and detail decoration. The whole design of the pen ensures the comfort level, the beautiful degree and the reading fluency of the pen, and the high-grade roller pen is decent and constraint, and unworldly, and has appreciation value and collection value when being used.

The invention discloses a method of improving the causticizing efficiency of recovered white liquor. The method comprises the following steps: dissolving a melt combusting in an alkali recovery furnace in water to form green liquor, leaving the green liquor to stand and clarify, taking a supernatant liquid to obtain clarified green liquor, and separating the green liquor through a micro filtrationmembrane to obtain concentrated green liquor; adding an additive into the concentrated green liquor, then adding fine lime milk for a digestion reaction and filtering the mixture, and washing the obtained precipitate with diluted white liquor till the pH is 7.5-9.0 to obtain a fine calcium carbonate solution; adding the fine calcium carbonate solution and the additive into the clarified green liquor, separately and then adding fine lime milk for a causticizing reaction, and carrying out solid-liquid separation through a vacuum pre-hanger to obtain white liquor; and generating fined calcium hydroxide particles in a manner of digestive causticizing separation, then by adopting a spiral extruding and filtering form, culturing calcium carbonate crystal seeds by combining with a crystal importing method and a crystal form control technology and finally, injecting crystal nucleuses into the green liquor to carry out the causticizing reaction. The measures improve the causticizing effect greatly, and the causticizing rate can reach over 90%.

The invention discloses a boring lathe which comprises a base, an object stage, a first driving device and a boring rod, wherein the base is a horizontal rectangular seat body; the boring rod is horizontally arranged above the base along the length direction of the base, and the two ends of the boring rod are connected with the two ends of the upper end of the base respectively through first strutmembers rotationally connected with the boring rod; the first driving device is arranged at one end of the upper part of the base through a second strut member, and the driving end of the driving device is in transmission connection with any one end of the boring rod; a boring cutter is arranged on the boring rod; the horizontal object stage is arranged at the upper end of the base in a sliding mode, and the object stage is positioned under the boring rod; and under the action of external force, the object stage can slide along the length direction of the base. The boring lathe has a simple structure.

The invention discloses a construction site management system for epidemic prevention and control, and relates to the technical field of construction site construction management. Warning patterns arearranged on the three side faces of a warning column, construction site personnel can see the warning patterns from all angles, through arrangement of a linear sliding groove and a sliding block, a rotating ring can freely slide in a vertical direction, a cleaning brush can clean the side faces of the warning column in a vertical direction, through arrangement of an annular limiting groove and alimiting column, the rotating ring can rotate in a circumferential direction of the rotating ring, therefore the cleaning brush can clean the side faces of the warning column in the circumferential direction, through arrangement of a fixing device, the rotating ring can be fixed at different heights, so that the rotating ring and the cleaning brush can rotate conveniently, dust on the warning patterns can be cleaned conveniently through up-down sliding and circumferential sliding of the cleaning brush, the situation that the warning patterns are shielded is effectively avoided, and it is guaranteed that a whole warning board can play a role in warning the construction site personnel clearly.