14results about How to "Strong shear" patented technology

The invention discloses a deflection composite cavitation nozzle for water jet surface treatment, and relates to the technical field of cavitation jet nozzles and jet surface treatment.The deflection composite cavitation nozzle comprises a nozzle inner pipe, a nozzle outer pipe and a deflection piece, the nozzle outer pipe is arranged outside the nozzle inner pipe in a sleeving mode, and a common flow cavity is formed between the nozzle outer pipe and the nozzle inner pipe; an inner cavity of the nozzle inner pipe is a high-pressure water flow channel, a high-pressure water flow inlet is formed in one end of the high-pressure water flow channel, the other end of the high-pressure water flow channel is blocked by a deflection piece, and a scaling outlet is formed in the position, close to the deflection piece, of the high-pressure water flow channel in the radial direction and communicated with the co-flow cavity. A high-pressure water and low-pressure water co-flow area is formed in the space between the scaling outlet and the outer nozzle outlet, and a low-pressure water flow inlet communicated with the co-flow cavity is formed in the side wall, away from the outer nozzle outlet, of the nozzle outer pipe. The cavitation rate can be greatly improved, the cavitation effect is better, and the treatment effect of cavitation jet flow is improved.

The invention relates to the technical field of sound equipment production, in particular to a drilling device for sound equipment production, which comprises a bottom plate, a drilling mechanism, a drilling mechanism, a drilling mechanism and a drilling mechanism, a mounting frame is fixedly mounted on the left side of the upper end of the bottom plate, and the drilling mechanism is arranged at the upper end of the mounting frame; the positioning frame and the mounting frame are located on the same axis; a supporting frame is fixedly mounted at the upper end of the connecting rod, and the supporting frame is located under the drilling mechanism; and the two dust collection mechanisms are located on the front side and the rear side of the supporting frame correspondingly and distributed in a staggered mode, each dust collection mechanism comprises a sliding part installed at the upper end of the bottom plate, a dust collection part is arranged at the upper end of each sliding part, and the working end of each dust collection part faces one side of the supporting frame. According to the device, support is provided below the punching part, scraps generated in the punching process are collected, vibration generated in the punching process is reduced, and the punching precision and the hole forming effect are greatly improved.

The invention discloses a method for preparing high-strength engineering plastic from recycled PA66 plastic and application of the high-strength engineering plastic, and relates to the technical field of chemical engineering. The method at least comprises the following steps: warehousing and homogenizing the recycled PA66 plastic; crushing the homogenized PA66 plastic, uniformly premixing the crushed PA66 plastic with a chain extender and an antioxidant, and performing a first extrusion process to obtain rPA66; putting part of the rPA66, the antioxidant, the lubricant, the compatibilizer, the black sand and the light stabilizer into a high-speed mixer, and uniformly mixing to obtain a premix; and performing a second extrusion process on the premix, the modified carbon fiber and the remaining rPA66 to obtain the high-strength engineering plastic prepared from the recycled PA66 plastic, wherein the modified carbon fiber is obtained by modifying a silane coupling agent, carbon nanotubes and polyvinyl alcohol. The high-strength engineering plastic with excellent mechanical properties is obtained by modifying the carbon fibers through the grafted silanized carbon nanotubes and the polyvinyl alcohol to serve as a reinforcing agent for recycling the PA66 and cooperating with an optimized side feeding and fiber adding process.

The invention provides an extrusion screw for producing a PVC cast film and an extrusion device, and belongs to the technical field of extrudes.The extrusion screw comprises a screw body, the screw body comprises a feeding section, a compression homogenizing section, a plasticizing section and an extrusion section which are sequentially arranged in the axial direction of the screw body, first screw flights are distributed on the feeding section, the compression homogenizing section and the plasticizing section, and second screw flights are distributed on the extrusion section; the first screw flight is distributed on the feeding section, the second screw flight is distributed on the extrusion section, a barrier mixing head and a stirring mixing head are arranged on the extrusion section, the barrier mixing head is located between the first screw flight and the second screw flight, the feeding section, the plasticizing section and the extrusion section are all of an equal-diameter shaft structure, the diameter of the feeding section is smaller than that of the plasticizing section, and the compression homogenizing section is of a variable-diameter shaft structure. The diameter of the compression homogenizing section is gradually increased from one end close to the feeding section to one end close to the plasticizing section. The screw has the beneficial effects that the structural design of the screw is reasonable, the mixing and homogenizing effects of materials can be ensured, the materials cannot stay for a long time at high temperature, and meanwhile, the productivity efficiency is ensured.

The invention discloses an efficient heat dissipation device based on non-Newtonian fluid and metal fins and a preparation method thereof.The efficient heat dissipation device comprises a sealing cover, a base and the porous metal fins, the sealing cover is internally provided with a containing cavity matched with the porous metal fins, the porous metal fins are arranged on the base, and the containing cavity is communicated with the base. The sealing cover covers the base, so that the sealing cover and the base form a sealed cavity structure, a working medium inlet and a working medium outlet are respectively formed in the sealing cover and are connected with an external liquid cooling circulation system, and a cooling working medium is a non-Newtonian fluid; according to the scheme, the non-Newtonian fluid is coupled with the porous fin structure, and the local viscosity of a working medium is actively regulated and controlled by utilizing a high shear field in the porous medium, so that the synergistic strengthening effect of low pump work and high heat exchange is realized.

The present invention discloses an automatic thread trimming device for sewing, including a dust plate pressure plate, a needle plate, a fixed blade, a fixed blade mounting seat, a small mouth barrel type mounting seat, a lower shaft, a lower shaft retaining ring, a rotary hook, a rotary hook cover, a rotating cutter bar, a rotating cutter, a movable cutter crank, a connecting rod screw, a connecting rod, a cylinder mounting plate, a cylinder, a cylinder fixing plate and a cylinder baffle. The present invention has a reasonable design, and the cylinder moves forward and backward to allow the force to drive the rotating cutter bar to rotate through the movable cutter crank, so that the rotating cutter and the fixed blade on the rotating cutter bar are crossed to form the effect of the scissors structure function, and the sewing thread is cut. The cylinder is extended and contracted as a power source to drive the rotating cutter and the lever principle is used for transmission, so that the relative opening and closing separation stability between the blade surface of the rotating cutter and the blade surface of the fixed blade can be ensured, and the shearing force is large.

The application discloses a split type shearing ram for blowout preventer, which comprises an upper shearing ram assembly and a lower shearing ram assembly. The upper shearing ram assembly comprises an upper shearing ram body, an upper shearing cutter body and a first clamping plate. The upper shearing cutter body is in concave-convex cooperation with the upper shearing ram body and is connected through a fastening screw. The upper shearing ram body is connected with a first ram shaft through the first clamping plate. The lower shearing ram assembly comprises a lower shearing ram body, a lower shearing cutter body and a second clamping plate. The lower shearing ram body is in concave-convex cooperation and sliding connection with the upper shearing cutter body. The lower shearing cutter body is in concave-convex cooperation with the lower shearing ram body and is connected through a fastening screw. Meanwhile, the cutting edge of the lower shearing cutter body corresponds to the cutting edge of the upper shearing cutter body. The lower shearing ram body is connected with a second ram shaft through the second clamping plate. The first ram shaft and the second ram shaft are located on the same horizontal line. The application has low maintenance cost, good shearing stability, reliable connection, convenient disassembly and assembly and strong shearing capacity.

The utility model discloses a pair of flexible single-acting pointed scissors for a hysteroscope, which relates to the field of medical instruments and comprises a scissor head, a fixed scissor head arranged at the front end of the scissor head and a movable scissor head hinged with the fixed scissor head. The movable handle is rotationally connected with the fixed handle, and a through hole is formed in the upper part of the fixed handle; the front end of the hose is sleeved with the scissor head, the rear end of the hose is sleeved with the screen cap, an inner pull rod penetrates through the hose, the head of the inner pull rod is in transmission connection with the movable scissor head, and the tail of the inner pull rod extends out of the hose and penetrates into the through hole to be fixedly connected with the spring pressing rod; one end of the spring pressing rod is fixed on the movable handle, the other end of the spring pressing rod penetrates into the through hole, and the movable handle drives the spring pressing rod to axially slide along the through hole; and the screen cap sleeves the outer wall of the through hole, and the tail end of the hose extends into the screen cap after being sleeved with a stress application spring. According to the hysteroscope surgical scissors, tissue can be sheared in hysteroscope surgical operation, a suture line can be sheared during suturing, after the stress application spring is sleeved on the hose, the shearing force is stronger, and the problem that the hose is easy to break when being bent is avoided.

This utility model relates to the technical field of adhesive production equipment and discloses an automatic adhesive batching and mixing device, including an inclined support and a shuttle-shaped material tank. A feed pipe is rotatably provided on one side of the inclined support, and a batching component is provided at the feed end of the feed pipe. The feed pipe is rotatably connected to one end of the shuttle-shaped material tank. A discharge pipe is rotatably provided on the other side of the inclined support. A stirring rod connecting the feed pipe and the discharge pipe is provided inside the shuttle-shaped material tank, and the discharge pipe is rotatably connected to the other end of the shuttle-shaped material tank. By rotatably connecting the feed pipe and the discharge pipe to the shuttle-shaped material tank, a rigid connection between the shuttle-shaped material tank and the feed pipe and discharge pipe is avoided. A drive component can drive gear ring one and gear ring two to rotate in opposite directions. Gear ring one and gear ring two can respectively drive the shuttle-shaped material tank and the stirring rod to rotate in opposite directions, forming a powerful shearing and kneading effect, completely eliminating mixing dead zones.

The present application relates to the technical field of lamination machine, in particular to a double-host composite lamination machine, which comprises a lamination frame, a winding roller, a steering roller, a composite roller and a flat die head are arranged on the lamination frame, the flat die head is located between the steering roller and the composite roller, further comprising a glue scraping mechanism, the glue scraping mechanism comprises a glue scraping plate attached to the bottom of the composite roller, and a cleaning strip capable of reciprocating is arranged on the glue scraping plate; a deep cleaning mechanism, the deep cleaning mechanism comprises a driving shaft and a turntable arranged on both sides of the driving shaft, a plurality of cleaning rollers arranged in a circular array around the driving shaft are arranged on the turntable, the cleaning rollers are rotatably connected to the turntable, and one end of the cleaning rollers is provided with a driven gear. The present application constructs a progressive composite roller cleaning process from rough scraping to fine cleaning through the cooperation of the glue scraping mechanism and the deep cleaning mechanism, the two cooperate with each other to realize multiple cleaning of the surface of the composite roller, effectively prevent the protrusion caused by waste material during compounding, and ensure the flatness of the lamination layer and the compounding quality.

This utility model relates to a novel grinding disc-assisted grinding device for a sand mill, comprising a frame, a variable frequency motor fixedly installed inside the frame, a bearing seat fixedly installed above the frame, a drive shaft mounted on the bearing seat, the variable frequency motor and the drive shaft connected by a drive belt device, a grinding cylinder fixedly mounted on the bearing seat by grinding cylinder fixing bolts, and an end cap fixedly mounted on the other end of the grinding cylinder by end cap fixing bolts. The bearing seat, grinding cylinder and end cap form a sealed grinding chamber, in which a grinding disc, a conical spacer and a rotor are arranged. The conical spacer is a spacer with a tapered structure. The grinding disc and the conical spacer are mounted on the drive shaft, and the rotor is mounted at the farthest end of the drive shaft. The stirring device composed of the grinding disc, the conical spacer and the rotor rotates with the drive shaft. This utility model solves the problems of traditional cylindrical spacers not being able to fully utilize the grinding chamber space and having low grinding efficiency, and square spacers having high energy consumption and relatively insufficient uniform mixing ability.

The application discloses a kind of methyl ester waste water multistage processing equipment in saccharin production process, it is related to wastewater treatment technical field, to solve the technical problem that mixing is difficult when existing nozzle dosing is to high viscosity, easy stratification wastewater, including air flotation tank, drug delivery system, dosing mechanism and support frame.The application can realize the intelligent switching of two kinds of mixing modes, wherein the "vortex ring injection" mode can be further subdivided into vertical and horizontal action form: when vertical injection, vortex ring forms vertical entrainment using buoyancy effect, can realize macroscopic circulation and depth mixing from bottom to top for liquid of whole pool depth, especially suitable for breaking heavy stratification and strengthening mass transfer;When horizontal injection, vortex ring spreads horizontally along density interface, produces strong shear and disturbance, can quickly homogenize interface concentration and prevent local precipitation, suitable for large-area shallow mixing;Another "jet injection" mode forms multiple concentrated high-speed jets through jet pipe array.

The invention discloses a preparation and inspection method of salmon emulsion gel for improving dysphagia, relates to the technical field of preparation and inspection of protein emulsion gel, and solves the problems of dysphagia due to diet rich in protein and insufficient functional fatty acid intake of most of old people. And a salmon emulsion gel product performance verification system is not sound. On the molecular level, a large-size myofibrillar protein filament aggregate is converted into nano-sized myofibrillar micelles, the nano-sized myofibrillar micelles are dissociated in oil and are connected and aggregated with other proteins, and the molecular mechanism of the nano-sized myofibrillar micelles in the aspects of stabilization of salmon emulsion gel and thickening of texture can improve the stability of the salmon emulsion gel. The salmon emulsion gel product can be used for changing the structure and the self-assembly characteristic of protein, effective and comprehensive inspection is carried out on the salmon emulsion gel product, and the effect of improving dysphagia of the salmon emulsion gel product is strongly proved.

This utility model discloses a reciprocating vertical high-speed mixer, including a container; a mixing mechanism, including a splined shaft that can slide up and down relative to the container and a mixing shaft fixedly connected to the bottom of the splined shaft, wherein mixing blades are rotatably connected to the outer wall of the mixing shaft, and the mixing blades are rotatably engaged with the mixing shaft through a telescopic connecting rod assembly; a drive component, which is disposed on the container to drive the splined shaft to rotate and achieve material mixing; a reciprocating mechanism, which is installed on the top of the container to drive the splined shaft to perform up and down reciprocating motion inside the container; and a mixing angle adjustment mechanism, which is installed on the top of the reciprocating mechanism to control the mixing blades to switch between a first angle and a second angle during the reciprocating motion of the splined shaft. The reciprocating vertical high-speed mixer provided by this utility model achieves high-speed rotation through the drive component and up and down reciprocating motion through the cooperation of electromagnetic and spring mechanisms, breaking the single two-dimensional flow field and causing strong convection and shearing of the materials in each layer inside the container.