96results about How to "Solve easy wear and tear" patented technology

The invention discloses a method and a device for measuring the pore volume change of a porous medium. The method comprises the following steps of: A, putting a workpiece to be tested into a holder; B, closing an upstream control valve and a vent valve, and opening a communication valve, a downstream control valve and a pressure regulating control valve; C, after the device is positioned in the vacuum state and stable, closing the downstream control valve; D, performing confining pressure stepwise loading/unloading experiments; and E, opening the vent valve, setting a pressure regulating controller to be zero, and finishing the measurement of the pore volume change. The pressure regulating controller mainly comprises a front fixing sleeve, a rear fixing sleeve, a movable sleeve, a sliding head, a sliding block, a screw rod, a rotary head and a rotary rod, wherein the rear fixing sleeve is provided with a main scale; the movable sleeve is provided with a branch scale; and the main scale and the branch scale are used for reading the volume difference. The device is easy to operate, is convenient to read, is stable in performance and reliable in measurement, and is suitable for quick, continuous, accurate and intuitive measurement of wide-range pore volume change of porous media under the condition of complicated stress variation.

The invention relates to the field of food safety, in particular to a method for tracing a source of the information of livestock products. In links of feed plants, culture farms, slaughter houses and sales persons, the information of the livestock products is managed by source tracing cards and a source tracing system, wherein according to the quantity of carcasses or cut meat obtained after livestock is slaughtered and cut, the source tracing cards, together with the carcasses or the cut meat, enter a sales link, so that consumers can acquire the register information of the source tracing system according to the register information of the source tracing cards; the register information of the source tracing cards comprises the enterprise information of the feed plants, the enterprise information of the culture farms or the host information of raisers, the immune ear tag numbers of the livestock, slaughtering date, slaughtering number, the enterprise information of the slaughter houses, quarantine results of the livestock and the information of quarantine personnel; and the register information of the source tracing system comprises feed information provided by the feed plants, the feeding and management information of the livestock, immune program information and the slaughtering information of the livestock. Therefore, if problems appear in the livestock products, the reason can be traced from the source of feed quickly.

The invention relates to a saw web used for both cutting and grinding. The saw web comprises a saw web body, double-layer cutter heads, tooth backs and a grinding wheel. Grooves are formed in the positions, on the same sides of the tooth backs, of the saw web body. The double-layer cutter heads are welded in the grooves. The grinding wheel comprises an upper grinding wheel body and a lower grinding wheel body. The upper grinding wheel body and the lower grinding wheel body are annular and arranged on the both sides of the saw web body correspondingly. The saw web body, the upper grinding wheel body and the lower grinding wheel body are provided with bolt through holes in fit with one another. The upper grinding wheel body and the lower grinding wheel body are fixed to the saw web body through bolts. By adoption of the saw web used for both cutting and grinding, a cut surface can be cut and ground at the same time, the efficiency is greatly improved, the flatness of the ground surface is improved, and the perpendicularity of the ground surface and a profile is improved; and meanwhile, by designing the embedded cutter heads, the impact resistance of saw web cutter teeth of the saw web to to-be-cut materials during cutting is greatly improved, and the cutter heads are not prone to falling off.

The invention provides a bounce-free plug-in type vacuum arc-extinguishing chamber. The bounce-free plug-in type vacuum arc-extinguishing chamber comprises a static contact, the static contact is provided with a contact portion used for plugging conduction with the outer peripheral face of a moving contact, the static contact is internally provided with a buffer contact used for contact cooperation with the end surface of the moving contact through elastic components. The bounce-free plug-in type vacuum arc-extinguishing chamber has the following advantages: the static contact is internally provided with the buffer contact used for contact cooperation with the end surface of the moving contact through the elastic components, such that when the moving contact is in plugging fit with the static contact, the end surface of the moving contact is in contact with the buffer contact, when the moving contact moves, under the effect of the elastic components, the buffer contact moves along with the moving contact, the elastic components are compressed, in such a process, kinetic energy of the moving contact is absorbed by the buffer contact and the elastic components, bounce of the moving contact is eliminated through proper design of the buffer contact and the elastic components, and the problem of easy wear caused to the outer peripheral face of the moving contact in a bounce process is also solved.

The invention discloses a method and a device for measuring a breakthrough pressure of a porous medium material. The method comprises the following steps of: A, placing a saturated infiltration phase tested piece into a holder, and loading a confining stress to the tested piece; B, shutting off an upstream emptying valve, a downstream emptying valve and a backpressure emptying valve, and vacuumizing; C, when the device is in a stable vacuum state, making the device pass through an upstream non-infiltration phase injection system and a downstream infiltration phase injection system; and D, simultaneously performing test on the breakthrough pressure and the permeability coefficient. The holder is connected with a confining stress control valve through a pipeline; the upstream is connected with an upstream control valve and an upstream pressure meter through pipelines; the downstream is connected with a downstream control valve, a downstream pressure meter and a backpressure control valve respectively through pipelines; a communicating valve is connected with an upstream non-infiltration phase and a downstream infiltration phase respectively through pipelines; a data acquisition cardis connected with the upstream pressure meter through a data wire. The invention is easy in operation, stable in performance and reliable in measurement, and applicable to simultaneous, quick, efficient and precise measurement of the breakthrough pressure and the permeability coefficient of the porous medium material.

The invention discloses a manufacturing method of a metal alloy composite screen plate. The manufacturing method comprises the following specific steps of 1) carrying out net pulling compounding; 2) manufacturing an alloy sheet pattern outer contour; 3) preparing a film layer; 4) coating an adhesive layer; 5) coating a film; 6) drying; 7) laser; 8) cleaning; and 9) detecting and packaging. In thisway, according to the manufacturing method of the metal alloy composite screen plate, a metal alloy sheet is adopted to replace traditional mesh cloth, and the manufacturing method has low elongationrate, better dimensional stability, printing resistance, puncture resistance, double supports of the metal alloy sheet and the film layer are adopted, the service life of the bonding strength far beyond a silk-screen and the film layer can be improved by 30% or above, and under the action of a high-molecular adhesive, the adhesion force of the high-molecular composite layer is extremely high, theplate making yield is greatly improved, the production cost is saved, the printing is good, the line type is good, and the efficiency of a battery piece is obviously improved.

The invention provides a flexible stretchable electromagnetic shielding fabric and a preparation method thereof. The method for preparing the flexible stretchable electromagnetic shielding fabric comprises the following steps: selecting a spandex stretch fabric as an elastic adhesion matrix, applying a certain tension to two ends of the fabric, stretching the fabric to a certain elongation and fixing, and coating a layer of liquid elastic adhesives on the surface of the elastic adhesion matrix; performing pressure dipping on a flexible nano electromagnetic shielding composite film on the liquid elastic adhesives, coating a layer of liquid elastic adhesives on the upper side of the flexible nano electromagnetic shielding composite film, allowing the composite film to be adhered to another spandex stretch fabric, and curing the adhesives under a certain conditions; releasing the tension applied to the elastic adhesion matrix so as to drive the flexible nano electromagnetic shielding composite film to retract, thereby obtaining the flexible stretchable electromagnetic shielding fabric. The flexible stretchable electromagnetic shielding fabric disclosed by the invention has the characteristics of high elasticity, high elongation, excellent electromagnetic shield property and the like.

The invention provides a flexible stretchable electromagnetic shielding film and a preparation method thereof. The preparation method of the flexible stretchable electromagnetic shielding film comprises the following steps: selecting an elastic membrane as an elastic adhesion matrix, stretching the elastic membrane to a certain elongation, then fixing the elastic membrane, and coating a liquid elastic adhesive layer on the surface of the elastic membrane; crushing a flexible nano electromagnetic shielding complex film on the liquid elastic adhesive layer, coating resin with protective effect at the upper side of the flexible nano electromagnetic shielding complex film to form a resin layer, and curing the liquid elastic adhesive and the resin under certain conditions; and releasing a tensile force applied onto the elastic adhesion matrix, so as to drive the flexible nano electromagnetic shielding complex film to retract, namely the flexible stretchable electromagnetic shielding film is obtained. The prepared flexible stretchable electromagnetic shielding film has good elasticity, high elongation (20-50%) and excellent electromagnetic shielding property (electromagnetic wave absorptivity is more than or equal to 99% at the frequency of 1-5GHz) and can bear certain bending and compression deformation.

The invention discloses a manufacturing method of a composite screen printing plate. The manufacturing method comprises the following steps of 1) screen pulling and compounding; 2) film layer manufacturing; 3) coating an adhesive layer; 4) coating a film; 5) drying; 6) laser; 7) cleaning; and 8) detection and packaging. By means of the mode, the manufacturing method of the composite screen plate has the advantages that when the screen printing plate is used, the film layer is not easy to wear and break, the printing life is prolonged by one time or more, the printing life of a conventional plate-making screen printing plate is averagely increased by about 50 thousand, the average energy of the screen printing life prepared by the method can reach 100 thousand or above and even higher, theprinting line at the later stage is not expanded, and the efficiency of the battery piece is obvious; and the manufactured screen printing plate is better in ink permeability, so that the limitation of the high-precision narrow line width can be greatly reduced, on the basis of the same type of ink printing, the width of the designed line can be compressed by 2-5 microns, the printing is good, theline type is good, and therefore the efficiency of the battery piece is obviously improved.

The invention relates to a method for preparing self-taping screw which can reduce the mold consumption, increase the mold service life, and reduce the producing cost, which comprises following steps: initial blank preparation, cap molding, tail molding, cutting part molding, and screw molding. Wherein, the cap molding step is that arranging the initial blank into the first molding mold to punch the cap to attain the first blank with cap; the tail molding step is that: arranging the first blank into the second molding mould and using the second molding mould to punch another end of first blank to form the second blank with tail; the cutting part molding step is that: arranging the tail of second blank into the third molding mould to punch the tail to form the third blank with cutting part; and the screw molding step is that: via the thread rolling of forth molding mould on the rod of third blank, forming the screw rod with screw thread and removing the burr of cutting part.

The invention relates to a soil gas flux detector comprising a soil ring (1), supporting legs (2), a pedestal (20), a gas chamber (7), a protective cover (8), a line passing shaft (9), and a control box (19). The flux detector is characterized in that a sealing ring (5) and a pressing ring (3) are arranged above the pedestal (20); the supporting legs (2) are arranged below the pedestal (20); supporting led slide grooves (16) and supporting leg rotation shafts (14) are arranged on the supporting legs (2); a buffering device (8-7) is arranged in the gas chamber (7), the protective cover (8), and the line passing shaft (9); and a return button (19-4) is arranged on the control box (19). With the device provided by the invention, problems such as exposed gas pipe and line, gas chamber offset, and large measuring error of soil gas flux detector can be solved.

The invention discloses a manufacture method of a multi-angle or zero-angle screen printing plate. The manufacture method comprises the following specific steps of 1) drawing a net and compounding thenet; 2) carrying out a screen printing plate washing treatment; 3) performing graph scanning; 4) preparing a film layer; 5) coating an adhesive layer; 6) coating a film; 7)drying; 8) carrying out laser etching; 9) cleaning; and 10) detecting and packaging. By means of the mode, the manufacture method of the multi-angle or zero-angle screen printing plate has the advantages that the contour of theline formed by laser is clear and flat, the line width is uniform, the shape of the painted line is better, and has obvious advantages compared with conventional plate making; the polymer composite layer is not easy to fall off, so that the plate making yield is greatly improved; when the screen printing plate is used, the film layer is not easy to wear and break, the printing life is prolonged by more than one time, the printing lines in the later period cannot be expanded, and the efficiency of the battery piece is obvious; and the manufactured screen printing plate line is better in ink permeability, so that the limitation of the high-precision narrow line width can be greatly reduced, the printing is good, the line type is good, and the efficiency of the battery piece is improved moreobviously.

The invention provides a physiological signal detecting system and a physiological signal detecting method. The physiological signal detecting system comprises a measuring device, an analog signal processing module, an analog-digital conversion unit and a digital signal processing unit, wherein the measuring device is provided with an optical sensing interface which retrieves optical plethysmogram signals of testees; the analog signal processing module is electrically connected with the optical sensing interface and the analog-digital conversion unit; the optical plethysmogram signals are converted into a digital format by the analog-digital conversion unit; the digital signal processing unit is electrically connected with the analog-digital conversion unit; and the digital signal processing unit senses characteristic points of the optical plethysmogram signals in the digital formats, so that the interphase of the characteristic points and heart rate variability parameters of the testees are calculated. Therefore, users can conveniently sense the heart rate variability parameters per se to achieve the health early warning effect.

The invention relates to an abrasion-resistant tire special for a tractor. The tire is manufactured with, by weight, 20-25 parts of natural rubber, 5-7 parts of sulfur powder, 1-2 parts of nano-crystalline cellulose whiskers, 6-8 parts of zinc oxide, 6-8 parts of a vulcanizing agent, 4-5 parts of stearic acid, 5-8 parts of a wear-resisting agent, 5-8 parts of a rubber air tightness enhancing agent, 8-12 parts of octyl-phenolic tackifying resin, 2-3 parts of plasticity polyurethane elastomer (TPU) and 5-8 parts of high-performance long aramid fibers. According to the tire special for the tractor, a material formula is simple and reasonable, the problem that a tire of the tractor is abraded easily can be effectively solved, and the service life of the tire of the tractor is prolonged.

The invention relates to a rotary welding tool for friction welding and a welding method, which achieve welding by friction of a rotary welding tool on the surface of a workpiece. The welding tool forrealizing the friction welding method consists of a core material and a support body. The core material is a consumable material and is composed of a cylinder or a prism made of the same material asa to-be-welded material. One end of the support body is sleeve-shaped and is in close fit with the core material; and the other end is a common knife handle connected with a motor spindle. The supportbody is a non-consumable part, and the material strength of the support body is higher than that of to-be-welded materials. Compared with common linear friction welding and rotary friction welding, butt joint, lap joint and spot welding of plates can be welded through mutual friction of homogeneous materials, and the friction welding method is not limited to workpieces with specific section shapes any more. Compared with common friction stir welding, a non-consumable stirring tool is not needed to serve as a welding tool any more, and the problem that a stirring head is prone to abrasion andbreakage is fundamentally solved.

The invention discloses a compressor. The compressor comprises an air inlet cavity, a compression cavity, a middle pressure cavity, a high-pressure buffering cavity and a back pressure adjusting mechanism, wherein the compression cavity is formed between a movable vortex disc and a fixed vortex disk, the compression cavity comprises a first compression cavity and a second compression cavity, the inner pressure of the first compression cavity is larger than the inner pressure of the second compression cavity; the back pressure adjusting mechanism controls the middle pressure cavity to be in communication with the first compression cavity or the second compression cavity. On the basis of an existing scroll compressor structure, the back pressure adjusting mechanism is arranged, the adjustingstructure is used for controlling the pressure of the middle pressure cavity in the back of the fixed disk and the switching between the first compression cavity and the second compression cavity according to the pressure difference between the exhaust pressure and the suction pressure or directly the exhaust pressure, so that the sealing of a pump body under the light-load working condition is guaranteed, and the problem of back abrasion of the fixed vortex disk under heavy load working conditions is avoided.

Provided is a textile technology of blending textiles. The technological process is that purified cotton piled yarns and cotton yarns added with conductive wires are twisted into piled yarns by a twisting device, a sectional warping machine is used, the piled yarns are arranged in a warp beam according to arraying of two conductive wires per inch, a high-speed rapier loom is used for weaving, procession inspection is conducted on an arranging workshop, dyeing is conducted according to technological requirements during dyeing, after dyeing and coloring, a softener is added according to the technology, and testing, inspecting, preshrinking and sizing processing are conducted. By means of fabrics which are produced according to the requirement of the textile technology of the blending textiles, the overall effect of the surfaces of the fabrics is smooth and flat, the grade of the fabrics is improved, wearing is comfortable, the using range is wide, the function and effect are better, and the functions of resisting mildew and bacteria, absorbing moisture, ventilating, preventing ultrasonic rays, preventing static electricity, being good in draping, eliminating the fact that the yarns can be worn and broken easily in the using process and the like are achieved.

The invention discloses a spinning technology of a textile. The spinning technology of the textile comprises the steps that plied yarn twisted by twisting equipment for pure-cotton plied yarn and cotton yarn with static wires is arranged on a beam by means of a sectional warping machine in a mode that two strands of static wires are added into per inch of the piled yarn, weaving is carried out by means of a loom, the piled yarn is sorted and checked in a workshop according to a corresponding technique, and the filed yarn is boiled firstly with soft water containing a scouring agent in a proportion of 2-8g/L for 10 hours during sorting, wherein the temperature of the water is 50-80 DEG C; then soft water is reinjected, wherein the bath ratio is 1:15, and the temperature is 40-70 DEG C; biological enzymes are added and processing is carried out for 40-60 min, wherein the pH of an acid enzyme is 4-5 and the pH of a neutral enzyme is 6-7; dewatering, drying and printing according to the technique are carried out in sequence, and then testing, checking, preshrinking and shaping are carried out in sequence. Fabric manufactured with the technology has the advantages of being high in grade, comfortable when the fabric is worn, wide in application range, resistant to mould and bacteria, capable of absorbing moisture, breathable, capable of preventing ultraviolet rays and static electricity, and good in drapability. Fracture, caused by abrasion, of the yarn can not occur easily in use.

The invention provides a piece of powder coating equipment which comprises a spraying gun part, wherein the spraying gun part comprises a powder outlet which is disposed in a conical manner; an impeller is installed in the powder outlet; a powder circulation gap is disposed between the impeller and the powder outlet; a mixing chamber is disposed on the upper part of the impeller and installed at the powder outlet; the mixing chamber is located above the back face of the impeller and disposed in an annular manner; and the mixing chamber comprises a chamber wall, a channel communicating with the mixing chamber is formed in the chamber wall, and a power supply pipeline is connected to the channel. According to the invention, the high-voltage powder chamber is used as a powder supply source; a powder floating rate is increased by 15%-20%; and centrifugal effects generated from impeller rotation are used to solve the uniformity problem existing in powder fluidization.

The invention discloses an alloy bit. The alloy bit is characterized in that the alloy bit is manufactured by processing magnesium, titanium, chromium, manganese, iron, and aluminum through a compressing an sintering process according to a certain weight percentage, wherein the alloy bit comprises components of, by mass, 5.9%-8.1% of the magnesium, 20.5%-27.4% of the titanium, 13.5%-19.6% of the chromium, 31.6%-38.9% of the iron, 22.1%-25.7% of the magnesium, and 10.1%-13.8% of the aluminum. According to the alloy bit, by means of the manner, various kinds of sound metal is compressed and sintered to manufacture the alloy bit, so that the alloy bit has the advantages of being high in hardness and tenacity, difficult to abrade and fracture, long in service life, and capable of greatly improving production efficiency, and saving production costs.

The present invention discloses mold core for molding glass, and the mold core includes base material and protecting film on the base material and containing M1 and C, where M1 is the noble metal Pd, Au, Ir, Ru, Re, Ta, Pt, Rh, Os or their combination. The protecting film has one precise molding surface far from the base material for molding and has thickness greater than 5 microns.