71results about How to "Reduce shear force" patented technology

The utility model relates to the field of harvesting machinery, and discloses a harvesting machinery, a threshing device and a concave grid thereof, the concave grid comprises a supporting frame, a plurality of longitudinal partition plates (3) and a plurality of grid strips (4), the longitudinal partition plates (3) and the grid strips (4) are connected to the supporting frame and mutually staggered and extend to form a grid, and a plurality of slots (31) which are distributed at intervals are respectively formed in each longitudinal partition plate (3). The grate bars (4) penetrate through the slots (31) to extend, and the portion, between every two adjacent slots (31), of each grate bar (4) protrudes towards the radial inner side. In the process that crop straw rotates along with the threshing cylinder, the concave grid is beneficial to separation of grains from the straw, the grain separation rate is increased, meanwhile, the amount of crushed straw and weeds carried in the separated grains is reduced, the risk that the grains are crushed or the surfaces of the grains are damaged is reduced, and the crushing rate and the loss rate of the grains are remarkably reduced.

The invention relates to the technical field of metal composite wires, in particular to a manufacturing method and device of a double-layer metal composite wire. The manufacturing method comprises the following steps that S1, a double-layer metal composite blank rod is taken, the double-layer metal composite blank rod comprises a core layer metal wire and a metal coating layer coating the outer side of the core layer metal wire, and the tensile strength of the metal coating layer is larger than that of the core layer metal wire; s2, the double-layer metal composite blank rod is subjected to multi-pass drawing, a composite metal wire is obtained, pulse current is applied to a metal coating layer located in a drawing area in the drawing process, the mechanical property of the metal coating layer is made to be matched with that of a core layer metal wire, and interface fracture is restrained; and S3, the composite metal wire is subjected to annealing treatment, and the composite metal wire is obtained. According to the method, the effect that only the metal coating layer is softened is achieved by controlling pulse current parameters and utilizing the skin effect and the electroplastic performance, the drawing deformation of the inner metal and the drawing deformation of the outer metal are consistent, the quality of the composite wire is improved, and the method is suitable for the situation that the conductivity of the inner-layer metal is larger than that of the outer-layer metal.

The present application relates to a pair of oil palm harvesting scissors, wherein a first driving motor is provided in a mounting circular groove at one end of a gripping rod, and is transmission-connected with a lead screw, a movable block is provided on the outer threaded sleeve of the lead screw, and a movable knife is provided on the movable block; an end mounting seat is mounted and connected to the gripping rod, and is provided with a fixed knife; in the length direction of the gripping rod, the fixed knife and the movable knife are located on the same straight line; when in use, the lead screw is controlled to rotate by the first driving motor, thereby driving the movable knife on the movable block to move toward the fixed knife, so as to trim the oil palm petiole located between the movable knife and the fixed knife; after trimming, the movable knife and the fixed knife move in the opposite direction, thereby realizing automatic shearing and accelerating the trimming efficiency; in addition, the movable knife and the fixed knife are arranged at intervals on a straight line, so that the scope of application is wider, and the blades of the movable knife and the fixed knife are in the opposite direction to the width of the oil palm petiole, and the shearing force is applied along the thickness direction of the oil palm petiole to avoid shearing along the width direction of the oil palm petiole, thereby reducing the required shearing force.

The reverse hedging type steam seal device of the steam turbine comprises a steam seal body, high teeth are arranged on an inner ring of the steam seal body in the radial direction, and a gas seal groove channel is formed in the side, facing the low-pressure end, of each high tooth; a main cavity is formed in the air seal channel, an energy consumption cavity is formed in the left side of the main cavity, a hedging cavity is formed in the right side, and a cavity inlet is formed in the bottom. After entering the main chamber, the steam main flow leftwards forms a first steam branch flow to enter the energy consumption chamber, and rightwards forms a second steam branch flow to enter the hedging chamber; an energy consumption structure is arranged on the inner wall of the energy consumption chamber, and the energy consumption chamber is provided with an energy consumption channel for communicating the first steam branch flow with the steam main flow; the inner wall of the hedging chamber is smooth, the hedging chamber is provided with a reversely inclined hedging channel, and the second steam branch flow and the steam main flow form a reverse steam flow hedging effect through the hedging channel. According to the invention, the leakproofness of the steam seal can be effectively improved, and the problem of movement of the rotor shaft is reduced on the basis.

The invention relates to the technical field of turning-over devices, and discloses a turning-over device suitable for critical care, comprising a bed body, the bed body comprises a bed frame, the inner wall of the bed frame is fixedly connected with a fixing frame, and the lower surface of the bed frame is fixedly connected with supporting legs; a folding mechanism for assisting a patient in turning over is arranged on the upper surface of the fixing frame; wherein the folding mechanism comprises a middle plate, and the middle plate adopts an isosceles trapezoid design. The turning-over device suitable for critical care can effectively solve the problems that in the prior art, most turning-over beds assisting patients in changing body postures are of a single-side turning-over structure from the middle position of a bed body, due to the shape and structural characteristics of the human body, when the turning-over beds are turned over along the central axis, the moving speeds and paths of different parts of the body are difficult to completely synchronize, and the turning-over effect is poor. When the upper half body is turned over, the position of the upper half body is changed faster than that of the lower half body, so that shearing force is generated between the skin and the bed surface, and the risk of pressure sores is increased due to the shearing force.

The utility model relates to the technical field of stacking machine, concretely relates to a split type lower crossbeam and stacking machine, including installation subassembly, installation subassembly includes the crossbeam body that sets along the length direction of ground rail, and the both ends of crossbeam body are connected with installation horizontal plate respectively, and the roller wheel group that forms detachable connection with installation horizontal plate respectively, and the installation horizontal plate is driven along the length direction of ground rail and moves by roller wheel group, and the roller wheel group forms the upward support to installation horizontal plate to exert the upward support force Fa to installation horizontal plate, the utility model discloses the both ends of crossbeam body are set up installation horizontal plate respectively, and the detachable bolt connection is formed with roller wheel group through installation horizontal plate simultaneously, so that installation horizontal plate exerts the downward pressure to the top of roller wheel group, and then the top of roller wheel group exerts the upward support force Fa to installation horizontal plate and crossbeam body, reduces the shear force that roller wheel group bears, and then avoids the shear deformation of bolt, reduces the difficulty of roller wheel group dismounting.

According to the semiconductor product processing equipment and the mist discharging system, the mist discharging fan is connected with the rack through the damping mechanism, vibration of the mist discharging fan can be effectively prevented from being transmitted to the rack, the machining precision can be improved, the damping mechanism can adopt different structures according to needs, and when a connector is adopted, the connector is connected with the mist discharging fan through the damping mechanism. The connector is connected to the top of the first supporting rod through the first damping connecting base and connected to the bottom of the second supporting rod of the rack through the second damping connecting base, the second supporting rod can effectively limit the connector, and the problem that the connector topples due to the fact that the mist discharging fan is arranged on the first side of the connector is solved; shear force borne by bolts for connecting the first and second damping connecting seats with the first and second supporting rods is reduced, and the structural stability and safety of the damping structure are effectively guaranteed. When the bracket is adopted, the structure is simple, and a two-stage damping structure is adopted, so that the vibration of the fog exhaust fan can be isolated from the rack to the greatest extent, and the influence on the main shaft is avoided.

The utility model relates to the technical field of track beam supports, in particular to a straddle type monorail traffic PC track beam support which comprises an upper swing and a lower swing, a single lug plate is arranged at the bottom of the upper swing, a rotating hole is formed in the single lug plate in the transverse bridge direction, a hinged shaft is rotationally arranged in the rotating hole, and a double-lug fork is arranged at the top of the lower swing. A sliding hole is formed in the double-lug fork, the two ends of the hinged shaft are inserted into the sliding hole, a first sliding plate and a second sliding plate which can slide mutually are arranged between the top and the bottom of the hinged shaft and the top and the bottom of the sliding hole, the first sliding plate is fixedly arranged on the hinged shaft, and the second sliding plate is fixedly arranged on the inner wall of the sliding hole. Sliding spaces are formed between the two sides, in the bridge direction, of the hinged shaft and the inner walls of the sliding holes, so that the upper pendulum can slide in the bridge direction relative to the lower pendulum through the first sliding plate and the second sliding plate. The upper pendulum and the lower pendulum of the support longitudinally move through the two sliding blocks, and abrasion of the hinged shaft and the lower pendulum is avoided.

A kind of TiAl alloy shaped blank package rolling method of imitating asynchronous rolling and TiAl alloy plate, the method comprises the following steps: preparing TiAl alloy shaped blank; The prepared TiAl alloy shaped blank is placed in the recess of corresponding stainless steel package, a composite isolation layer is filled between the TiAl alloy shaped blank and the outer layer stainless steel package, and welding is carried out, to obtain the TiAl alloy package blank of imitating asynchronous rolling;The obtained TiAl alloy package blank of imitating asynchronous rolling is placed in high temperature furnace, heated to 1100-1350 DEG C, and kept for 0.5-5h, then package rolling is carried out along the specified direction, and after every two passes, it is returned to the furnace and kept for 5-30min, after rolling, the rolled TiAl alloy package plate is placed in vacuum furnace for stress relief annealing;And the package shell on the rolled TiAl alloy package plate is removed by wire cutting method, to obtain TiAl alloy plate with deformation≥90%.The application also provides TiAl alloy plate prepared by the method.

The drilling tool comprises a drill bit, the drill bit is provided with a cylindrical shell, the bottom edge of the cylindrical shell is fixedly connected with a plurality of diamond drill bits, the top of the cylindrical shell is narrowed inwards and provided with a connecting part, and the connecting part is used for being connected with a drilling machine. A plurality of spiral sheets are uniformly arranged in the drill bit and are matched to form a continuous spiral flow guide channel, the disturbance is low, specifically, the spiral iron sheet is segmented, the shearing force to sludge during rotation is reduced by 40%-60%, and the layering definition of a sample is improved; rapid preparation is achieved, drilling tool assembly can be completed within 2 hours through a standardized welding assembly, and the cost is extremely low; the spiral design is beneficial to continuous sampling of samples and can prevent the samples from slipping off in the lifting process; environmental adaptability: the device is highly adaptive to a drilling tool, and is at least suitable for rivers, lakes, reservoirs and the like with the water depth of 30 m or less and the sludge thickness of 20 m at present through actual operation.

The invention discloses a wire fixing device which comprises a clamp, and the clamp comprises a first clamping plate, a second clamping plate, a connecting column and an elastic part. The first clamping plate comprises a first clamping part; the second clamping plate comprises a second clamping part opposite to the first clamping part; the first end of the connecting column is fixedly connected with the first clamping plate, the second end of the connecting column penetrates through an opening in the second clamping plate, and the second clamping plate can slide relative to the first clamping plate in the length direction of the connecting column so as to change the distance between the second clamping plate and the first clamping plate; the elastic piece sleeves the connecting column, the first end of the elastic piece is connected with the first clamping plate, and the second end of the elastic piece is connected with the second clamping plate; a first flexible gasket is arranged on the side, facing the second clamping plate, of the first clamping part, and a second flexible gasket is arranged on the side, facing the first clamping plate, of the second clamping part. The wire dismounting cost can be reduced, and the damage to the wire when the wire is clamped can be reduced.

The application provides a pickling purification method of porous carbon for silicon-carbon negative electrode materials and a product thereof, and belongs to the technical field of battery material preparation. The method overcomes the defects of poor purity and long process flow of the existing pickling method. The production method comprises the following steps: crushing carbonization raw materials to 20-50 meshes, and then performing physical activation. The method further comprises the steps of "blowing and stirring cleaning" and "belt rinsing while simultaneously performing vacuum exhaust and controlling the water content to be 60%". The porous carbon is deeply and efficiently purified, so that the iron content and ash content of the porous carbon are reduced to a very low level (Fe<30ppm, ash content<0.2%), and the high-pore structure (iodine value≥1600mg / g) of the porous carbon is maintained. The unique blowing and stirring method has smaller shearing force on the carbon skeleton, and better protects the microstructure of the porous carbon. The belt rinsing is continuously operated, and has high automation degree, and is suitable for large-scale industrial production. The porous carbon product prepared by the method has very high purity and high specific surface area, and meets the needs of high-end lithium ion batteries.

The present application relates to plastic bottle crushing technical field, disclose a kind of regenerative polyester bottle piece production equipment, comprising: plastic bottle crusher, plastic bottle crusher has crushing chamber, the bottom of crushing chamber is provided with crushing immersion module;Crushing immersion module includes folding liquid storage basin, heating module, lifting control module and discharge module;Folding liquid storage basin is set in the bottom of crushing chamber, folding liquid storage basin is preloaded with liquid inside, heating module is set in folding liquid storage basin, for liquid is heated to 70 DEG C to 80 DEG C;Lifting control module is set in the bottom of folding liquid storage basin, for driving folding liquid storage basin vertical direction lifting movement;Discharge module includes receiving conveyor, and a plurality of mesh holes are distributed on receiving conveyor;The liquid in folding liquid storage basin is heated to 70 DEG C ~ 80 DEG C by heating module, and hot liquid is immersed upward to waste plastic bottle through the mesh hole of receiving conveyor, so that plastic bottle is fully softened to vitrification transition temperature interval before crushing.

The invention relates to a pump blood driving mechanism of a blood pump, the blood pump and a ventricular assist system. The blood pumping driving mechanism comprises a paddle assembly and a driving assembly. The blade assembly has a first form and a second form, and the maximum radial size of the blade assembly in the first form is larger than the maximum radial size of the blade assembly in the second form; the driving assembly can drive the paddle assembly to axially stretch out and draw back in a reciprocating mode so that the paddle assembly can be switched between the first form and the second form in turn, and then the paddle assembly can conduct blood pumping operation. The blood pumping driving mechanism can effectively reduce the shearing force on blood cells, so that the hemolysis risk is greatly eliminated, meanwhile, the clinical application time and stability of the product are greatly improved, and the effects of low-frequency operation and high blood perfusion can be achieved.

The utility model discloses an ox horn glue feeding structure without air marks on a plastic mold. The inner diameter of the end part, close to a cavity, of an underflow channel is gradually reduced, and the underflow channel is formed by smoothly connecting a plurality of sections of cambered surfaces and inclined surfaces. According to the utility model, the cambered surface sections and the inclined surface sections are arranged at the glue injection end part in the oxhorn-shaped underflow channel at intervals, so that the glue can be guided to steer for multiple times, the flow velocity of the glue can be gradually reduced, the impact force of high-pressure glue on the inner wall of the underflow channel can be gradually reduced, and the glue injection port of the underflow channel can keep stable dimensional accuracy for a long time; therefore, the stable forming quality is ensured; the side wall is vertically arranged on one side of the glue injection port, so that the shearing force of the mold to the glue liquid injected into the cavity can be reduced to the greatest extent, the generation of gas marks at the glue inlet is eliminated or reduced, and the large inner diameter ratio of the two opening ends of the ox horn runner and the two end parts of the slow flow part can ensure that enough glue liquid is injected into the cavity in unit time, so that the production efficiency is improved. The forming defects such as insufficient injection, internal bubbles and white points are avoided, and the forming quality is improved.

The utility model relates to a polymer low-shear flow valve which comprises a sealing screw plug, a flange cover, a sealing ring, a valve element assembly, a valve body, a centering support, a viscosity reduction valve sleeve and a viscosity reduction valve seat and is characterized in that a step is arranged in the valve body, the centering support is arranged on one side of the step, the viscosity reduction valve seat is arranged on one side of the centering support, and the sealing ring is arranged on the other side of the step. The viscosity reduction valve sleeve is installed on one side of the viscosity reduction valve seat, the viscosity reduction valve sleeve and the viscosity reduction valve seat are sequentially arrayed in the valve body, the balance sleeve is installed on one side of the viscosity reduction valve sleeve, the sealing ring is installed on one side of the balance sleeve, the flange cover is installed on one side of the valve body, and the sealing screw plug is installed on one side of the flange cover. Through the combined arrangement of the valve core assembly, the viscosity reduction valve sleeve and the viscosity reduction valve seat, the resistance received by fluid is reduced, and the shearing force is reduced.

This application discloses a post-knee joint exercise device, including a base component, an adjustment component, and a support component. The base component includes a base plate with several positioning ribs on its top. The adjustment component is located on the top of the base plate, in front of and behind the positioning ribs. The adjustment component includes a fixed seat arranged laterally along the base plate. A guide rod is provided on the top of the fixed seat, and a slider is slidably mounted on the guide rod. The slider slides along the length of the guide rod, and a pulley is provided on the top of the slider. The support component includes a folding plate, comprising a first plate body and a second plate body. The first plate body is located to the right of the second plate body, and its right end is swayably connected to the right side of the top surface of the base plate. A rotating rod is provided on the left end face of the first plate body, and a traction rope is provided on the front side of the rotating rod. The other end of the traction rope passes sequentially through the front pulley and the rear pulley, and is connected to the rear side of the rotating rod. This device can reduce shear forces during rehabilitation exercises.

The present application provides a high-density substrate stacked packaging structure and a packaging method, which relate to the field of semiconductor packaging technology. The high-density substrate stacked packaging structure includes a first chip, a conductive wire arc, a first plastic package and a first dielectric layer. The first chip has a first solder pad. Both ends of the conductive wire arc are connected to the same first solder pad. The first plastic package covers the first chip; a first wiring layer electrically connected to the conductive wire arc is provided in the first dielectric layer. The first dielectric layer covers one side of the first plastic package close to the first solder pad. A first bump electrically connected to the first wiring layer is provided on the surface of the first dielectric layer. The shear force on the chip during the grinding process can be reduced to prevent the chip from being damaged or cracked.

The utility model provides an aneurysm embolism device with a spring ring integrated with an umbrella-shaped dense net. The aneurysm embolism device comprises a spring ring body, a central connecting rod and a metal woven dense net, one end of the spring ring body is connected with the central connecting rod through a micro rivet; the metal woven dense net is of an umbrella-shaped structure, and the tail ends of net wires in the center of the metal woven dense net are axially bundled and fixed in a lantern ring in the center through welding. The lantern ring is fixedly welded to the end, away from the spring ring body, of the center connecting rod. According to the integrated umbrella-shaped dense net spring ring system, the traditional embolism technology and the blood flow guiding concept are creatively combined, the dense net structure serves as a physical barrier and can effectively prevent the spring ring from shifting, and the precise net hole design can remarkably change the hemodynamic characteristics of the tumor neck; in addition, due to the integrated design, the surgical operation process is simplified, and the technical difficulty is reduced. The innovative design concept not only solves the key technical problem in the treatment of the wide-neck aneurysm, but also remarkably improves the safety and reliability of the treatment.

The utility model relates to an anti-falling and abnormal-moving structure for a sliding block, and belongs to the technical field of die design. Comprising a mold B plate, a section of sliding block sliding rail is arranged on the upper surface of the front end of the mold B plate, a sliding block body is installed in a sliding block sliding rail groove in a front-back sliding mode, and a screw hole connected with an equal-height screw is formed in the bottom of the sliding block body. The equal-height screw sequentially penetrates through the gasket and the rectangular spiral spring and penetrates through the through hole in the base plate to be in threaded connection with the sliding block body, a protection block is further arranged below the equal-height screw and is parallel to the equal-height screw, and the protection block is connected with the surface of the front end of a die plate B through an inner hexagon screw.

The utility model relates to the technical field of stirring kettles, and discloses an adjustable turbulent flow stirring kettle which comprises a stirring kettle body, a middle convex bottom sleeve is arranged at the inner bottom end of the stirring kettle body, a stirring shaft is rotatably mounted in the stirring kettle body, a convex cylinder is fixedly sleeved on the outer surface of the stirring shaft, and the convex cylinder is fixedly sleeved on the outer surface of the stirring shaft. A plurality of inclined paddles are annularly and fixedly connected to the outer surface of the convex cylinder, pin blocks are rotationally connected to the sides, away from each other, of the inclined paddles, and flow pushing toothed plates are fixedly connected to the bottom ends of the pin blocks, so that irregular swing is formed in high-viscosity fluid through the synergistic effect of folding stirring blades and multiple groups of flow guiding paddles, the shearing force is remarkably reduced, and the stirring efficiency is improved. And meanwhile, the inclined paddle at the bottom is linked with the plug flow toothed plate, so that deposited particles are impacted forcibly, and a dead zone at the bottom of the kettle is eliminated. The whole uniform mixing is realized, the problem of high viscosity of the pseudoplastic fluid far away from the paddle area is solved, the solid sedimentation is prevented, and the stirring efficiency and the fluid quality are greatly improved.

The invention discloses a processing method of dried anchovy products, comprising soaking and freezing, cooking treatment, drying treatment, cooling treatment and screening treatment. The invention adopts the synergistic effect of sodium chloride, composite phosphate and vitamin C, and the prepared composite solution is used to soak and thaw anchovies, so as to reduce the water loss of anchovy products, slow down the oxidation discoloration of anchovy products, and keep the fresh and tender taste of anchovy products. The invention realizes the automatic production of dried anchovy products, greatly reduces the labor cost, greatly reduces the production site area, improves the drying conditions and controllability, and the prepared dried anchovy embryo has stable quality, is not affected by the ambient weather, can be stored for a long time in an environment of -5 to -8°C, avoids the high energy consumption of freezing at -18°C, and reduces the storage cost.

The installation structure of the MBR membrane module assembly comprises a treatment container, a membrane module arranged in the treatment container, and a suspension mechanism, the treatment container is provided with a hoisting frame above the membrane module, the hoisting frame is driven by a reciprocating vibrator to reciprocate in the horizontal direction, the suspension mechanism comprises four hoisting arms, the upper ends of the hoisting arms are respectively hinged to the four corners of the hoisting frame and rotate along the reciprocating direction of the hoisting frame, and the lower ends of the hoisting arms are respectively hinged to the top frame of the membrane module and rotate along the reciprocating direction of the hoisting frame, and the combination constitutes the installation structure of the MBR membrane module assembly. The MBR membrane module assembly is simple in structure, low in transformation cost, is subjected to scouring with water body through rapid reciprocating motion, achieves the purpose of removing activated sludge adsorbed on the surface of the membrane module, and effectively reduces energy consumption.

The invention belongs to the technical field of exosomes, and discloses a small-scale exosome separation and purification method and a separation and purification kit, which are suitable for preparing high-purity exosomes of small-volume samples. The method comprises the following steps: pre-treating and concentrating a solution containing the exosome through a super-separation, ultra-filtration or PEG precipitation method to obtain a crude extract of the exosome; the crude extract is subjected to column purification, a purification column is based on the size exclusion principle, gravity column design is combined, a stationary phase is formed by highly cross-linking a compound matrix of dextran and agarose, the purification column is composed of a mobile phase PBS, and exosomes are separated from small particles such as protein and nucleic acid in the flowing process of the crude extract; a purified exosome solution is obtained by collecting a flow-through liquid of a specific fraction. The purification method disclosed by the invention does not need the assistance of a complex instrument, can realize efficient separation only by virtue of the gravity effect, and is particularly suitable for preparing exosomes of 0.5 mL small-volume samples.

The invention relates to a blood pump and a ventricular assist system. The blood pump comprises a handle mechanism, a catheter, a pump shell and a blood pumping driving mechanism. The handle mechanism comprises a handle body and a power assembly arranged on the handle body. The blood pumping driving mechanism comprises a paddle assembly and a driving assembly, the paddle assembly is arranged in the pump shell and has a first form and a second form, the maximum radial size of the paddle assembly in the first form is larger than the maximum radial size of the paddle assembly in the second form, and the near end of the driving assembly penetrates through the catheter to be connected with the power assembly. The power assembly can drive the paddle assembly to axially stretch out and draw back in a reciprocating mode through the driving assembly so that the paddle assembly can be switched between the first form and the second form in turn, and then the paddle assembly can conduct blood pumping operation. According to the blood pump, the operation safety can be improved by changing the blood pumping mode of the blood pumping driving mechanism and the position of the power assembly.

The invention provides an anti-shearing protection type aluminum alloy cable, which belongs to the technical field of cables and comprises at least one wire core, a supporting adhesive tape, at least one first armor and at least one second armor. The supporting rubber strip is provided with at least one fixing hole. And the wire cores penetrate through the fixing holes in a one-to-one correspondence manner. The first armor is sleeved on the supporting rubber strip; the outer diameter of one end of the first armor is smaller than the inner diameter of the other end. The second armoring is sleeved on the supporting rubber strip; the second armor and the first armor have the same structure; the thin end of the second armor is inserted into the thick end of the first armor. According to the anti-shearing protection type aluminum alloy cable provided by the invention, the wire core is wrapped by the supporting adhesive tape, the first armor and the second armor, when a shearing force is received, most of the shearing force is transmitted to the supporting adhesive tape through the first armor or the second armor, and the shearing force borne by the wire core is relatively small, so that the influence of the shearing force on the wire core is relatively small.

The invention provides a self-lubricating anticoagulant surface coating and a preparation method and application thereof, and the self-lubricating anticoagulant surface coating (SLACS) composed of dimethyl siloxane gel and dimethyl siloxane (S-PDMS) gel is prepared on a rough substrate through physical adhesion and chemical bonding. Under the action of the lubricating layer, plasma protein and blood cells are difficult to adhere to and activate on the surface of the SLACS. The SLACS shows strong blood adhesion resistance and is beneficial to high-level blood compatibility of the SLACS. The coating of the ECMO centrifugal pump head is improved through SLACS, the feasibility of the ECMO centrifugal pump head serving as a novel centrifugal pump head is further verified through static experiments, computer simulation and dynamic experiments, and a new choice is provided for safe medical treatment in the future.

This invention discloses a SNP molecular marker of the AFF3 gene associated with broiler meat quality traits and its applications, belonging to the field of molecular biology. The nucleotide sequence of this SNP molecular marker is shown in SEQ ID NO.3, with an A / G mutation at base position 601, and genotypes including AA, AG, and GG. This invention also provides primer pairs for amplifying this molecular marker and a detection method. This SNP site is significantly correlated with leg muscle pH, breast muscle pH, breast muscle conductivity, and breast muscle shear force. Genotype detection can identify broiler meat quality traits, which can be applied to marker-assisted breeding to improve selection accuracy.

The utility model discloses a driving groove bolt torsion test mechanism, which comprises a rack, a test board, a support plate, a guide rod, a telescopic cylinder, a test sleeve, a tool sleeve, a support sleeve, a test turntable and a circular arc brake disc, and is characterized in that the test board is fixedly arranged at the top of the rack. The testing structure can be used for testing starting and braking of the testing turntable driven by the simulated driving groove bolt, has the advantage of high accuracy of a simulation testing result, and can be used for observing whether a driving groove bolt main body subjected to sampling testing and a head driving groove of the driving groove bolt main body are distorted, deformed or cracked or not, and the testing turntable and the supporting sleeve adopt a square groove transmission mode; the device can reduce the shearing force on the fastening bolt, avoids the problem that the test turntable and the supporting sleeve are difficult to detach and separate due to bending deformation of the fastening bolt, limits and accommodates the lock nut through the tool sleeve which can be adjusted up and down, and facilitates the screwing, locking and fixing of the driving groove bolt main body and the lock nut.