33results about How to "Indestructible strength" patented technology

The invention relates to undercarriage shock test airplane wheel space displacement measuring system. It is made up of three space locating machine arms, four corner transducers, support, two magnetic attracting components, and computer. The three space locating machine arms are connected with each other by connecting fitting on which three corner transducers are set. The forth one is set on the support. Each of them is connected with the computer by lead. One magnetic attracting component is connected with the free end of the third space locating machine arm. Another one is fixed on the principal axis of the airplane wheel. While measuring three directions displacement, the invention can ensure expensive undercarriage run normally after shock test without drilling to set displacement transducer and destroying its structure and strength.

The invention discloses a railway down-traversing highway tunnel double-layer casing pipe reinforcement double-pipe shed follow-pipe drilling construction method. The method comprises the following steps that construction preparation is made, wherein existing tunnel defects are surveyed; secondly, advance geology forecast is conducted; double-layer pipe shed advance pre-reinforcement is conducted, wherein the double-layer pipe shed advance pre-reinforcement is adopted, a follow-pipe drilling method is adopted in construction, each segment of a single-hole steel pipe is installed after being drilled by one segment, after each hole is formed, the hole can be grouted immediately, drilling gaps are filled, and a periphery surrounding rock is reinforced; fourthly, excavating and supporting are conducted, wherein excavating is conducted through a double-side-wall drift heading technology, a fracture full ring is excavated, and double layers of supports of a structural steel frame and a grid steel frame are arranged; fifthly, secondary lining is conducted, wherein a curved wall composite lining with an inverted arch is adopted; and sixthly, construction is finished, and monitoring and measuring are conducted. According to the construction method, the excavation technology is reasonably selected, the effective advance reinforcing measure is taken, and the tunnel down-traversing construction is stably and safely finished.

The invention discloses an automobile body and auxiliary frame installing structure. The automobile body and auxiliary frame installing structure comprises an automobile body, an auxiliary frame, an auxiliary frame connecting bolt and a nut, wherein the auxiliary frame connecting bolt penetrates through the automobile body and the auxiliary frame to be tightly connected with the nut in a screwed mode. The automobile body and auxiliary frame installing structure is characterized in that a groove is formed in the automobile body, an automobile body bolt hole is located in the middle of the groove, the installing structure is further provided with a reinforcing plate, the middle of the reinforcing plate is a concave part, the concave part is installed in the groove in a matched mode, the periphery of the reinforcing plate and the automobile body are welded together, a bolt hole is formed in the middle of the concave part of the reinforcing plate, and a bolt rotating preventing boss is arranged by the side of the bolt hole. Due to the arrangement of the reinforcing plate, strength of connecting and tightening portions of the automobile body and the auxiliary frame can be improved, bolt compressing force can be evenly dispersed within a large-area range, and the phenomenon that the automobile bodydeforms or is damaged partially because tightening force of the bolt is too large is avoided. Furthermore, because the bolt rotating preventing boss is arranged on the reinforcing plate, the auxiliary frame connecting bolt can be effectively prevented from rotating in the screwing process, assembly operation is simplified and assembly efficiency is improved.

The invention discloses a shielding treatment device for a shielded compartment penetration cable for a ship. The shielding treatment device comprises a cable compartment penetration barrel and multiple cables which penetrate through the cable compartment penetration barrel, wherein the outer wall of the cable compartment penetration barrel is welded with a compartment penetration hole in a metal wall of the compartment; each cable comprises a metal armored cable and/or an insulated sheath cable; the metal armored cable directly penetrates through the cable compartment penetration barrel; multiple conductive film layers are tightly wound on a cable part where the insulated sheath cable penetrates through the cable compartment penetration barrel; flexible ferromagnetic adhesive tapes are wound on the insulated sheath cables on two sides of the conductive films; a certain spacing is formed between the flexible ferromagnetic adhesive tapes and the conductive films to form a common mode choke; soft metal wire balls with certain elasticity are filled in gaps between the cables and between the cables and the cable compartment penetration barrel; the metal wire balls are in a pressed shape; ion conductive paste is filled at two ends of the metal wire balls; waterproof sealant paste is filled on the outer side of the ion conductive paste at the two ends respectively. The shielding treatment device has the beneficial effects that the structure and strength of the cable are not damaged, and the electromagnetic interference is reduced.

The invention discloses a sintered rope saw string bead. The sintered rope saw string bead consists of diamond, a metal mold, a steel body and metal separation bars; the hardness of the metal separation bars is lower than the hardness of the metal mold; the metal separation bars are continuously distributed in the metal mold; the diamond is distributed in the metal mold; and the metal mold is fixedly connected to the surface of the steel body. Based on a traditional sintered rope saw string bead, the low-hardness spiral metal separation bars are implanted in the metal mold; when a rope saw works, the spiral metal separation bars without the diamond are easily rubbed and scoured by cutting chips to form spiral grooves on the surface of the string bead; and the grooves can achieve the effects of reinforced diamond cooling and smooth chip removal in the cutting process, so that the cutting efficiency of the rope saw is improved.

The invention relates to a method for degumming hemp. According to the method, an organic solvent is used as an extraction solvent, catalysts are adopted to degum hemp raw materials and remove lignin,the extraction process comprises four steps of catalytic cooking, solvent washing, water washing and bleaching, and the catalysts are selected from creosote, crosol, kreosote and/or creosote oil. According to the method, the technical problems of high energy consumption, large amount of waste water and high damage to the fiber strength of a conventional method for degumming hemp are avoided, andthe method has the advantages of high degumming efficiency, high product whiteness, high utilization ratio of raw materials, low equipment requirement, low cost, cleanness, energy conservation, environmental friendliness and safety and is suitable for large-scale industrial production.

The invention discloses a dyeing process of wool-rabbit hair blended yarns. The process comprises the steps of preparation, pre-treating, washing, dyeing, color-fixing, washing, finishing, quality inspecting, and packaging. According to the invention, the pre-treating step is added, such that dye uptake of the wool-rabbit hair blended yarns can be ensured under a relatively low temperature, and the strength of the yarns is not damaged. Therefore, economic benefit of the product can be improved. According to the invention, the dyeing process is simplified, product quality is ensured, and production cost is saved. Therefore, the process is suitable for industrialized productions.

The invention discloses am ethod for modifying high-performance carbon paper based on supercritical fluid technology. Under the action of the supercritical fluid, O2 and a titanate coupling agent are used for cooperatively modifying the carbon fibers, on one hand, the oxidation time can be shortened, the roughness and oxygen-containing groups of the surfaces of the carbon fibers can be improved, the surfaces of the carbon fibers are more effectively wetted, and uniform surface modification is achieved; and on the other hand, the titanate coupling agent has molecules with two groups with different properties, so that the defect that the modification effect of a single titanate coupling agent is not obvious because the number and the variety of oxygen-containing functional groups on the surface of the carbon fiber are relatively small can be overcome, and the mechanical property and the conductivity of the carbon paper are improved.

The invention provides a technological method for removing formaldehyde in a board through microwave exciting and vacuum drawing, and relates to a technological method for removing formaldehyde in the board. The technological method comprises the following processes: arranging the board without being subjected to surface coating and side sealing treatment on a shelf in a vacuum bin which is provided with a microwave transmission source, and then starting microwave radiation; maintaining the vacuum degree of the vacuum bin to be 400 Pa, and lasting for 15 minutes; repeating step C until the total drawing time reaches 5 hours; exhausting gas from the vacuum bin; moving out the board; and performing surface coating treatment. According to the method, the microwave radiation is adopted, so that the energy can be quickly transmitted into the board; the microwave radiation energy is equal to the hydrogen bond energy, so that hydrogen bonds can be effectively broken, and as a result, formaldehyde can be removed; the extreme vacuum degree of a production device is required a little; the processes are short; the intensity of the board is not broken. Therefore, the technological method is a practical technological method.

The invention discloses a method for preparing a hexagonal boron nitride coating on the surface of a carbon fiber material. The method comprises the following steps: carrying out surface pretreatmenton the carbon fiber material, impregnating the surface-pretreated carbon fiber material in a liquid precursor which is a mixed solution formed by mixing molten boric acid and urea which are respectively used as the boron source and the nitrogen source for hexagonal boron nitride, carrying out supercooling crystallization, and finally carrying out heat treatment in a nitrogen atmosphere furnace toobtain carbon fibers with the hexagonal boron nitride coating on the surface. The hexagonal boron nitride coating prepared on the surface of the carbon fiber material does not affect the strength or the toughness of the carbon fiber material, and the method has the advantages of simple process, low cost, dense coating, firmness in bonding, and the like, is suitable for carbon fiber tows, carbon cloths and fiber preforms, and has a significant application potential in engineering practices.

The invention relates to the technical field of carton printing machines, in particular to a paper feeding method lowering lifting plates at the same time and elevating the lifting plates at different time. According to the paper feeding method, the strength of a paper board is not damaged on the premise that the paper feeding precision is not affected, the competitive power of a printer is improved, meanwhile, the mechanical structure of the printer is simplified, and the paper feeding quality is improved.

The invention relates to a vacuum suction table of a double-layer structure. The vacuum suction table comprises a frame, a bottom plate, a panel and honeycomb cores; the bottom plate is provided with bottom plate suction openings and the panel is covered with small adsorption holes; the vacuum suction table is characterized in that the inner region of the frame includes air duct regions and installation regions, the air duct regions and the installation regions are independent mutually, the air duct regions are internally provided with air duct suction openings which are communicated with the bottom plate suction openings in a one-to-one correspondence mode, the installation regions correspond to the honeycomb cores one to one, and the frame is filled with corrugated cores located above the honeycomb cores, each corrugated core includes an upper end face, a lower end face and supporting connection faces, each upper end face is combined with the supporting connection faces located at the two sides of the upper end face to form an aeration area which is communicated with the corresponding air duct region, the upper end faces are connected with the panel and provided with small air holes A which are communicated with the small adsorption holes in a one-to-one correspondence mode, a part of lower end faces are in connection with the corresponding honeycomb cores in a covering mode, and the other part of the lower end faces are connected with the corresponding air duct regions. The vacuum suction table is high in strength, internal gas paths are small in windage resistance, energy loss is low, and adsorption force is large and uniform.

A rolling bearing is described, which comprises an inner ring fitted onto a shaft, an outer ring fitted in the housing, a plurality of rolling elements provided interposed between the inner ring and the outer ring and a lubricant packed thereinside and which is mounted between the shaft and the housing, wherein a rust preventive film comprising an oil-repellent material is formed on at least the outer surface of the outer ring and the inner surface of the inner ring, and a bearing apparatus is also described.

The invention discloses a processing method for an anti-collision square tube, and a product of the processing method. The processing method comprises the following steps that: according to the dimension parameter of the anti-collision square tube, designing a corresponding upper mould and a corresponding lower mould, then, assembling the upper mould and the lower mould to profiling equipment, andprocessing the anti-collision square tube by the profiling equipment. The anti-collision square tube is applied to a container. The upper surface of the anti-collision square tube is provided with aplurality of room-making notches which are arranged by corresponding to a convex-concave structure on the surface of the door body of the container, the room-making notches are profiled and formed bythe processing method for the anti-collision square tube, and therefore, and the upper surface of each room-making notch is provided with a sinking groove for making a room for the forming of each room-making notch. By use of the invention, the room-making notches of the anti-collision square tube can be profiled in one time, so that the processing technology of the room-making notches of the anti-collision square tube is simplified, labor hour efficiency is improved, and a great quantity of manual work and energy consumption cost can be saved. The invention is slightly affected by a technicallevel, the quality of the product is stable and controllable, the structural strength of the product is better, and forming is normative and attractive.

The invention provides a welding type probe, an intelligent bolt and an assembly process thereof, and belongs to the technical field of ultrasonic stress. The problems that an existing intelligent bolt is large in machining difficulty, and large-batch production is not facilitated are solved. The probe comprises a standard bolt and a probe package. The probe package is welded and fixedly connectedwith the upper surface of the standard bolt. The probe package comprises a sheath, contacts and a wafer. The sheath is further provided with a mounting groove and a through hole. The mounting grooveis used for positioning and mounting the wafer, the upper surface of the wafer is fixedly connected with the sheath in an insulating manner. The through hole is used for mounting the contacts, gaps exist between the contacts and the sheath, damping layers are filled in the gaps, and the upper surface of the wafer is fixedly connected with the bottom surfaces of the contacts and conductively connected. The probe has the advantages of being convenient to use, simple in structure, low in machining and assembling difficulty, low in production cost and high in detection precision.

The invention relates to an automatic flushing structure of a mechanical seal of a double suction pump. The automatic flushing structure is arranged in the double suction pump and comprises a left sealing flushing hole and a right sealing flushing hole which are located in a pump cover, wherein the sealing flushing holes are led out from the two ends of the upper end of the pump cover respectively and penetrate through a water suction chamber partition plate, and the two led-out ends of the sealing flushing holes are connected to a mechanical seal flushing cavity between the pump cover and a shaft. In the design process, a hole is drilled in the pump cover and directly faces a joint of a movable ring and a static ring of the mechanical seal, and in order to facilitate machining, the hole can deviate from the shaft by any angle, but the hole is guaranteed to be aligned with the joint of the movable ring and the static ring. The size of the hole diameter is determined according to the size of the mechanical seal of the designed pump. Through the high-pressure characteristic of liquid in a pump cavity, the mechanical seal is automatically flushed and lubricated through drilling, the structure is convenient to machine and compact, and the production cost is reduced. The overall strength of the pump cover is not damaged, an external pipeline capable of increasing the occupied space of equipment is not adopted, and the whole pump is attractive.