103results about How to "Small diameter" patented technology

The purpose of this disclosure is to provide a semiconductor wafer that can suppress the shrinkage of the diameter of the convex shape portion by providing cutouts on the outer peripheral surface and the convex shape portion of the semiconductor wafer, and a method for manufacturing the semiconductor wafer. The semiconductor wafer involved in this disclosure has a first surface and a second surface opposite to the first surface. The first surface has a first main surface and a surrounding surface that surrounds the first main surface via a stepped surface and is recessed from the first main surface towards the second surface. A first cutout is provided in a circumferential portion of the stepped surface connecting the first main surface and the surrounding surface, and a second cutout is provided in a circumferential portion of the outer peripheral surface connecting the second surface and the surrounding surface. The first cutout is in the shape of a positioning edge, and the second cutout is in the shape of a notch.

This invention provides a multi-stage, multi-angle, rapid diffusion oxygen dissolving three-dimensional non-clogging microbubble aerator. An air inlet pipe and an air pipe are sequentially connected along the air inlet direction. A rapid microbubble cutting and diffusion oxygen dissolving unit is fitted outside the air inlet pipe. An inner cylinder and an outer cylinder are sequentially fitted outside the air pipe from the inside to the outside. The inner cylinder has a first inner cylinder section, a second inner cylinder section, and a third inner cylinder section sequentially along the air inlet direction. A medium-sized bubble cutting and diffusion oxygen dissolving unit is installed on the outer wall of the first inner cylinder section, a large bubble cutting and diffusion oxygen dissolving unit is installed on the outer wall of the second inner cylinder section, and an air guiding unit is installed on the outer wall of the third inner cylinder section. An air diffuser unit is installed at the air outlet of the air pipe. This multi-stage, multi-angle, rapid diffusion oxygen dissolving three-dimensional non-clogging microbubble aerator effectively cuts air into microbubbles, effectively solving the problems of clogging and short lifespan of traditional aerators after long-term use, and is suitable for aerobic aeration treatment.

The application belongs to the technical field of micro-nano optics, and discloses a magnetic control fiber OCT probe and a preparation method thereof, which comprises: a transparent catheter; a single-mode optical fiber arranged in the interior of the transparent catheter; and an optical imaging assembly integrally formed on the end face of the single-mode optical fiber by means of a femtosecond laser two-photon polymerization technology, wherein the optical imaging assembly comprises a stator, a rotor and a focusing lens arranged in sequence, one end of the stator away from the rotor is fixedly connected with the single-mode optical fiber, the rotor rotates relative to the stator, one side of the focusing lens is provided with a reflecting surface, the reflecting surface is provided with a magnetic structure, and the magnetic structure is used for driving the rotor to rotate in response to an external magnetic field. The application can significantly reduce the diameter of the probe, improve the lateral resolution, and realize non-contact far-field magnetic control scanning, thereby directly serving the early diagnosis of microvascular lesions, intraoperative minimally invasive imaging and biological basic research.

The utility model relates to an executing mechanism and a joint mechanical device. The executing mechanism comprises a shell; the output part is rotatably mounted on the output side of the shell; the encoder is arranged on the output side and located on the radial outer side of the output part; the first gear is connected to the encoder; the second gear is connected to the output part; and the transmission gear is in transmission connection between the first gear and the second gear. The strength of a transmission structure between the output part and the encoder can be enhanced through gear meshing transmission, and the defects that traditional belt transmission is prone to slipping, aging, breakage and the like are overcome. By arranging the transmission gear, compared with direct meshing of the first gear and the second gear, the diameters of the first gear and the second gear can be reduced, and the situation that the diameters of the first gear and the second gear are too large to occupy too much space of the output side of the shell or exceed the outer diameter of the shell is avoided; therefore, enough arrangement space can be reserved for other related structures on the output side.

The utility model relates to a wheelchair technical field provides a low resistance track assembly, including track frame, the track frame includes two opposite setting frame board, the both ends of track frame are equipped with driving pulley and driven pulley respectively, and the both sides around the track of interconnection, driving pulley rotation sleeve connection is in driving axle, and driven pulley rotation sleeve connection is in driven axle, rotation is provided with a plurality of along track transmission direction arrangement's bearing wheel between two frame boards, the rolling of bearing wheel abuts on the inner surface of track located below it, and the diameter of bearing wheel is no more than 15mm. By this, the utility model discloses through setting up close arrangement's bearing wheel, and the load of track bearing is changed into rolling friction from sliding friction, and the drive resistance of track is greatly reduced. Bearing wheel diameter is small, and densely arranged, and the gap is small. When track is pressed on the object such as step, the deformation of track cannot enter the gap, avoids being stuck between two bearing wheels. The utility model provides a kind of climb wheel.

The utility model discloses a kind of hysteroscope liquid leakage prevention structures, including center cylinder base, the both ends of center cylinder base are fixedly connected with end fixed ring, the outer end array of two sides the end fixed ring is fixedly connected with multiple elastic supporting pieces, and the outer end of multiple elastic supporting pieces of same side is equipped with silica gel outer cover, two sides The outer side of elastic supporting piece is fixedly connected with operating slip ring and insertion stop seat respectively, and the outer end of two sides silica gel outer cover is fixedly connected with the outer edge of corresponding side operating slip ring and insertion stop seat.In insertion, small in diameter, it is convenient to set, and will not cause damage to cervix, can effectively solve the problem of clinical surgeon encountered in hysteroscopy surgery in uterine cavity liquid leakage, reduce operation time and surgical complications, improve operation efficiency and safety.

The application relates to the technical field of composite polyester fibers, and discloses a composite polyester fiber and a preparation method and application thereof, which comprises the following steps: obtaining melt by respectively melting core layer material and skin layer material, and then spinning the melt to obtain a composite polyester fiber with a skin-core structure; wherein the melting point of the core layer material is higher than that of the skin layer material by more than 22 DEG C; the intrinsic viscosity of the skin layer material is higher than that of the core layer material by 0.01-0.15 dL / g, and the standard deviation of the intrinsic viscosities of the core layer material and the skin layer material is less than or equal to 0.02 dL / g; the mass ratio of the core layer material to the skin layer material is x, and 1.5<=x<=4; wherein the shape of the spinning hole of the spinneret used in the spinning process is a concentric circle shape, the difference between the maximum diameter and the minimum diameter of each circle of the spinning hole is less than or equal to 2 micrometers, and the difference between the maximum diameter and the minimum diameter of each outer circle is less than or equal to 2 micrometers. The superfine polyester fiber disclosed by the application has high uniformity.

This invention relates to the field of heat dissipation airflow mesh technology, and provides an airflow mesh for passive airflow cooling, including a pipe assembly, a clamping assembly, and an adjusting assembly. The pipe assembly includes a main pipe, a secondary pipe, an adjusting pipe, a vertical plate, and a horizontal plate. The clamping assembly, sleeved on the outer wall of the adjusting pipe, includes a fixed plate, a movable part, a rotating plate, and a support block. The adjusting assembly is located at one end of the main pipe and inside the main and secondary pipes, and includes a motor, a rotating shaft located at the output end of the motor, a drive bevel gear sleeved on the end of the rotating shaft away from the motor, a rotating part located on the end of the drive bevel gear away from the rotating shaft, and a spiral part sleeved on the rotating part. The function of the pipe assembly is to connect traditional heat dissipation pipes in sections, and through the combined effect of the septum effect and Bernoulli's principle, to compress the gaseous working fluid and release heat, which is conducted away through the metal thermally conductive material, thereby reducing the temperature of the airflow after it passes through by approximately 50 watts / m² / m / s.

This utility model relates to a pipe sawing device, including a sawing mechanism and a pipe clamping mechanism mounted on a frame. The sawing mechanism includes two sawing components that slide relative to each other, located above the frame. The pipe clamping mechanism is located below the frame and has two clamping arms and a liftable guide block. Two guide grooves are symmetrically arranged on the guide block, and the lower end of each clamping arm is slidably connected to the guide groove on the same side. The lifting and lowering of the guide block causes the two clamping arms to close or separate. This utility model overcomes the shortcomings of existing technologies, such as slow speed, low cutting efficiency, high maintenance costs, and large footprint. It utilizes a smaller saw blade to cut pipes of various diameters, exhibiting strong adaptability.

A zoom endoscope optical system comprises, in order from the object side to the image side along the optical axis, a front fixed lens group, a zoom lens group and a compensation lens group, the front fixed lens group comprises a first lens, a second lens and a third lens, the zoom lens group is adjustable in position and comprises a fourth lens and a fifth lens, the compensation lens group is adjustable in position and comprises a sixth lens, a seventh lens, an eighth lens and a ninth lens, the ninth lens is an aspheric lens, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are spherical lenses, compared with the prior art, the eight spherical lenses and the one aspheric lens are arranged, thereby reducing the length of the optical system, shortening the lens diameter, simultaneously assisting in correcting the imaging quality, and the aspheric lens guarantees the edge precision and improves the imaging effect of detecting the tiny defects in the pipeline.

This utility model discloses a cup with a recessed lid, including a lid and a cup body. The cup body has a cavity with an opening at the top. The lid is detachably installed in the cup body, and the lid is lower than the opening at the top of the cup body. The lid divides the cavity of the cup body into a water-containing part located below the lid and a drinking part located above the lid. The water-containing part is used to contain liquid. The lid has a water outlet channel that can be opened or closed. When the water outlet channel is open, it connects the water-containing part and the drinking part. The liquid contained in the water-containing part can flow to the drinking part through the water outlet channel. By setting the lid to a recessed design and placing it inside the cup body, the diameter of the lid can be reduced, thereby obtaining better heat preservation performance. When drinking hot beverages, the drinking part serves as a transition area, making it easy for the user to observe and control the liquid flowing from the water outlet channel while drinking, thus avoiding burns. Furthermore, the recessed lid can prevent the lid from touching the nose while drinking, thus avoiding discomfort.

The application relates to a balloon catheter, characterized in that the balloon catheter comprises a balloon, a catheter, a terminal tube, a developing ring, a catheter seat, a stress tube and a catheter sleeve, the catheter comprises an inner tube and an outer tube, the outer tube is sleeved outside the inner tube, the distal end of the inner tube is connected with the proximal end of the terminal tube, the distal end of the balloon is fixed on the outer surface of the terminal tube and / or the inner tube, the proximal end of the balloon is fixed on the outer surface of the distal end of the outer tube, the developing ring is arranged on the inner tube in the balloon, the stress tube is fixed on the distal end of the catheter seat, the proximal end of the inner tube is fixed inside the proximal end of the catheter seat through the stress tube and the catheter seat, the proximal end of the outer tube is fixed inside the distal end of the catheter seat through the stress tube and the catheter seat, and the catheter sleeve is sleeved outside the balloon. The balloon catheter can effectively treat arterial or venous stenosis and the like.

The utility model relates to the technical field of galvanized steel pipes, in particular to an automatic galvanized steel pipe feeding machine which comprises a support and a feeding device, a first air cylinder is fixedly installed at one end of the support, a cutting machine is fixedly installed at the driving end of the first air cylinder, and the feeding device is arranged on the surface of the support and comprises a frame which is fixedly connected with the support. A direct-current motor is fixedly connected to one side of the frame, the driving end of the direct-current motor penetrates through the frame and is rotationally connected with the frame, the driving end of the direct-current motor is sleeved with a transmission belt, a guide pipe is fixedly connected to the surface of the support, a feeding port is formed in the side, close to the transmission belt, of the guide pipe, and a second air cylinder is fixedly connected to one end of the guide pipe. The conveying belt replaces manual carrying, the galvanized steel pipe can be rapidly and continuously conveyed to the cutting position, the overall process of cutting machining is greatly accelerated, and the requirement of large-scale production for efficiency is met.

The invention belongs to the technical field of strawberry biocontrol, and relates to application of chaetomium aureum JSNL-B47 in prevention and treatment of strawberry gray mold. The preservation number of the chaetomium aureum JSNL-B47 is CGMCC (China General Microbiological Culture Collection Center) NO. 40437. According to the present invention, the flat plate confrontation inhibition rate of the bacterial strain on Botrytis cinerea can achieve 67.94%, the extracellular metabolite inhibition rate can achieve 69.58%, strawberry resistance can be induced, and the scab inhibition rate can achieve 82.26%; the invention also provides a biocontrol inoculant containing hyphae, spores or secondary metabolites of the strain and a preparation method of the biocontrol inoculant. The biocontrol bacterium and the preparation thereof provided by the invention can significantly reduce the occurrence of strawberry gray mold, reduce the use of chemical pesticides, and are suitable for green agriculture.

This invention relates to the field of carbon nanotube technology, specifically disclosing a high-viscosity carbon nanotube conductive paste and its preparation method. The raw materials for this high-viscosity carbon nanotube conductive paste include ultra-long single-walled carbon nanotubes, short-cut multi-walled carbon nanotubes, conductive carbon black, carboxyl-terminated hyperbranched polyester-polyethylene glycol block copolymer, polyacrylic acid, fluorinated silane coupling agent, γ-butyrolactone, and N-methylpyrrolidone. The high-viscosity carbon nanotube conductive paste provided by this invention achieves uniform dispersion, low volume resistivity, excellent anti-settling properties, and good coating processability of the carbon nanotube conductive paste under high solids content through the synergistic effect of the carboxyl-terminated hyperbranched polyester-polyethylene glycol block copolymer, the fluorinated silane coupling agent, and polyacrylic acid, combined with multi-stage grinding and high-pressure homogenization processes.

This utility model discloses a mold closing mechanism with a composite ejector cylinder, including a moving mold plate, which has a mold plate body and an outwardly extending protruding structure. The protruding structure is equipped with at least one main ejector cylinder and at least two auxiliary ejector cylinders, the stroke of the main ejector cylinder being greater than the stroke of the auxiliary ejector cylinders. An ejector guide plate is provided between the mold plate body and the protruding structure. The piston rod of the main ejector cylinder is connected to the ejector guide plate, while the piston rod of the auxiliary ejector cylinders is not connected to the ejector guide plate. Several ejector rods are provided on the ejector guide plate, penetrating the mold plate body. During the stroke of the auxiliary ejector cylinders, the main ejector cylinder and the auxiliary ejector cylinders together drive the ejector guide plate to complete the ejection action of the ejector rods. During the remaining stroke, the main ejector cylinder alone drives the ejector guide plate to complete the ejection action of the ejector rods. This mold closing mechanism with a composite ejector cylinder can provide a large ejector force in the initial demolding stage and achieve rapid ejection in subsequent strokes, combining large ejection force and high movement speed to improve production efficiency.

This application provides a motor-driven rotating mirror assembly and a rotating lidar. The motor-driven rotating mirror assembly includes: a lens frame; a transmitting lens, a receiving lens, and a reflector, respectively fixedly mounted in a transmitting lens mounting hole, a receiving lens mounting hole, and a reflector mounting hole on the base of the lens frame; a transmitting circuit board and a receiving circuit board fixedly connected to the side of the base opposite to the side where the reflector mounting hole is located; a first through hole between the transmitting circuit board and the transmitting lens, and a second through hole between the receiving circuit board and the receiving lens; a rotating reflective structure, which is a straight or regular prism structure with reflective function on all sides; a rotating baffle that divides the rotating reflective structure into transmitting and receiving parts; a rotating mirror motor fixedly mounted in a motor mounting hole at one end of the rotating reflective structure and fixedly connected to the inner side of one side of the lens frame; and a rotating mirror motor drive circuit board fixedly mounted on the outer side of one side of the lens frame.

This application discloses a transformer and a power supply structure for a variable frequency microwave oven. The transformer includes a frame and a magnetic core assembly. The frame has a central hole; the magnetic core assembly is supported by the frame and includes a central magnetic post that passes through the central hole; the saturation magnetic flux density of the magnetic core assembly is greater than 420 millitalas; the diameter of the central magnetic post ranges from 13.5 mm to 15.5 mm; the difference between the diameter of the central hole and the diameter of the central magnetic post ranges from 1 mm to 5 mm. These features enable the miniaturization of the transformer.

The utility model relates to the technical field of ultrasonic slicers, and discloses a rolling unit, an ultrasonic slicer and a package composite fiber textile fabric, the rolling unit comprises a rolling shaft, a driving shaft, a driving device and a pressing frame, one end of the pressing frame is rotatably connected to a rack, the rolling shaft is rotatably connected to the pressing frame, and the driving device is connected to the rolling shaft. The rolling shaft comprises a cylindrical shaft used for sleeving the winding drum, and the diameter of the cylindrical shaft is 14-36 mm; when the materials are wound, the cylindrical shaft is sleeved with the winding drum, the end of the materials to be wound is connected between the winding drum and the driving shaft in an abutting mode, the pressing frame presses the materials connected with the winding drum in the abutting mode on the driving shaft through the gravity of the pressing frame, and the driving device drives the driving shaft to rotate so that the materials can be wound on the outer side of the winding drum. The device is simple in structure and low in production cost; materials are compactly pressed on the driving shaft through the pressing frame, so that the diameter of the cylindrical shaft can be set to be small, the diameter of the winding drum can be reduced, the size of towel roll products can be reduced, and the transportation cost can be reduced.

The application relates to a button component, a discharging mechanism and a press type container. The button component comprises a button body; the button body comprises a discharging channel; the discharging channel comprises a pump body connecting section and a guide section; the guide section is internally provided with a partition plate; the first sub-channel and the second sub-channel are separated in the guide section by the partition plate; the first port of the first sub-channel and the first port of the second sub-channel are both in communication with the pump body connecting section; the second port of the first sub-channel is in communication with the discharging port in the button body; and the second end of the second sub-channel is in a closed state. The button component, the discharging mechanism and the press type container comprising the button component can reduce the number of times that the pump body is pressed by the user for discharging when the user takes the material for the first time, optimize the use experience of the user, have the advantages of simple structure, easy production, convenient user operation and effective improvement of the use experience of the user, and have wide applicability.

A high-efficiency cold hydrogenation fluidized bed reactor is characterized by comprising a lower head, a cylinder and an upper head; a material inlet is arranged at the bottom of the lower head, and a gas distributor is arranged above the material inlet; a mixture of silicon tetrachloride and hydrogen enters from the material inlet and is uniformly distributed through the gas distributor; a silicon powder inlet, a silicon powder outlet and a plurality of bubble breakers are arranged above the gas distributor. By symmetrically arranging guide vanes, the airflow forms an "eight" symmetrical direction flow in a single grid block and forms a rotating flow between multiple grid blocks; the reverse arrangement of the guide vanes of the upper and lower bubble breakers makes the bubbles form a rotating cutting when passing through the grid block, which can effectively reduce the diameter of the bubbles and prevent the gas from re-agglomerating into bubbles along the vertical direction after breaking; meanwhile, the residence time of the material can be increased, and the turbulent flow degree of the material in the reactor can be increased, so that the flow field in the cold hydrogenation fluidized bed reactor can be improved, and the conversion efficiency of trichlorosilane can be improved.

The invention discloses an antibacterial air filtering material as well as a preparation method and application thereof. The preparation method comprises the following steps: opening and carding low-melting-point fibers and 2D fibers, and then conveying the fibers and the 2D fibers into a lapping machine to lay a fiber net; conveying the fiber net to a hot pressing roller for heating, pressing and shaping to obtain filter base cloth; the filtering base cloth is introduced into a melt-blown line spraying shaft; polypropylene particles and a silver ion antibacterial agent are mixed and then put into a heating bin for melt-blowing, melt-blown polypropylene fibers adhere to the outer surface of the filter base cloth, and a PP melt-blown layer is formed; the air filter cloth is obtained; spraying an antibacterial viscose solution on the PP melt-blown layer of the air filter cloth at high pressure; the air filter cloth is conveyed to drying equipment to be dried and shaped, and edge cutting and rolling are conducted. The air filtering material has a double-layer structure with a fluffy upper layer and a dense lower layer, and has antibacterial and antiviral functions, and the filter cloth can still keep high-efficiency filtering and antibacterial effects after being washed repeatedly.

This utility model discloses a highly flexible, tensile-resistant shielded power cable, comprising a conductor layer, a fastening layer, an insulation layer, a shielding layer, and a sheath layer arranged coaxially from the inside out. The fastening layer is a heat-shrinkable braided tubing, which, after heat shrinking, forms a tight, compressed fit with the outer surface of the conductor layer, significantly improving the cable's tensile strength. The shielding layer is a heat-shrinkable tube with a metal wire braided mesh layer. Before heat shrinking, its original inner diameter D1 and the outer diameter D2 of the insulation layer satisfy 1.1 ≤ D1 / D2 ≤ 1.2; after heat shrinking, its final inner diameter D1' and D2 satisfy 1.02 ≤ D1' / D2 ≤ 1.08, ensuring a tight electromagnetic shielding contact between the shielding layer and the outer surface of the insulation layer. This utility model, through its unique interlayer heat-shrinkable fastening and shielding structure, achieves a balance between excellent flexibility, small diameter, high tensile strength, and stable shielding, making it particularly suitable for scenarios requiring frequent bending and small-area wiring, such as stage equipment and automotive wiring harnesses.

A spiral rib hollow drainage pipe comprises an inner pipe wall, an outer pipe wall and spiral ribs, the outer pipe wall is tightly attached outside the inner pipe wall, the pipe wall profile extends along the cross-sectional direction and is sequentially spirally wound to extend and wrap the inner pipe wall, the embedded groove spirally extends along the outer surface of the inner pipe wall, the outer pipe wall comprises an outer film layer, a glass steel layer and a connecting layer, the connecting layer is tightly attached to the inner pipe wall and is embedded into the embedded groove through the embedded head to form a clamping connection, the spiral ribs are installed in the space formed by the first spiral groove and the second spiral groove, the glass steel layer wraps the connecting layer, and the outer film layer wraps the glass steel layer, the solid structure of the spiral ribs is used to enhance the structural strength of the pipe, the spiral ribs are not easy to bend and deform, the overall diameter size of the pipe is small, and the production cost of the drainage pipe is reduced.

This utility model discloses a fire truck hose and cable layout structure, including a fire truck and a drone, with the drone mounted on the upper part of the fire truck. A fire-extinguishing water spray pipe is installed on the drone, connected to the fire truck's water pump via a hose. The drone is connected to a DC power supply on the chassis at the bottom of the fire truck via a cable, with the drone receiving DC power from the chassis power supply. Only one positive conductor is installed in the cable. The hose includes an outer layer, a negative conductor, and an inner lining layer, with the negative conductor positioned between the outer and inner lining layers and braided together with the outer layer. This utility model removes the negative conductor from the cable and integrates it into the hose structure, reducing the cable diameter and weight, effectively increasing the drone's lifting height under a 400kg load. The flowing medium inside the hose continuously carries away heat from the negative conductor, avoiding overheating risks. Simultaneously, the braided copper conductor and polyester layer enhance the hose's compressive strength.

This invention discloses a wastewater treatment device for beverage factories, relating to the field of wastewater treatment technology. It includes a reaction tank, a coarse filter cartridge, a drive assembly, a fine filter cartridge, and a negative pressure suction nozzle. A purification cartridge is located at the top of one end of the reaction tank, and a dosing mechanism is installed above the middle of the reaction tank. The coarse filter cartridge is installed inside the purification cartridge, and two arc-shaped scrapers are symmetrically arranged inside the coarse filter cartridge. Arc-shaped scraper one is symmetrically arranged along the X-axis, and arc-shaped scraper two is symmetrically arranged along the Y-axis. The wastewater treatment device for beverage factories provided by this invention, through the design of the drive assembly, realizes the automatic downward scraping, sludge collection, spiral sludge discharge, and resetting of the arc-shaped scrapers. The entire process is completed while the coarse filter cartridge is continuously rotating, eliminating the need for shutdown and disassembly for cleaning, ensuring the continuity of coarse filtration operations, and significantly improving the treatment efficiency and operational stability of the device.

The invention discloses a telescopic rotary hydraulic cylinder, and belongs to the technical field of hydraulic cylinders. Comprising a cylinder body and a piston rod which are matched with each other, the revolving bed is fixed at the piston rod end; the rotary rod is rotationally mounted on the rotary seat and is coaxial with the piston rod; the pair of racks are fixed on the rotary seat and are arranged on two sides of the rotary rod in parallel; the ends, away from the rotary seat, of the two racks are fixedly connected with a rotary disc which rotationally sleeves the rotary rod. The gearbox is fixed to one end of the supporting cylinder. The input end of the gearbox is provided with a first straight gear meshed with the rack, and the output end of the gearbox is provided with an outer fluted disc matched with the internal spline of the piston rod. The rack is driven to move through linear motion of the piston rod, the linear motion is converted into rotary motion of the outer fluted disc through the gearbox, and therefore the rotary rod is driven to rotate, linkage of axial stretching and circumferential rotation of the rotary rod is achieved, and an additional motor or a rotary oil cylinder is not needed.

The utility model relates to a sewage treatment equipment for environmental protection engineering belongs to sewage treatment technical field, in order to solve the problem that the bubble diameter generated by traditional aeration is usually larger, the rising speed is faster, the oxygen utilization rate is lower, and cannot form the full mixing with sewage, the utility model discloses sewage treatment tank and the oxygen cavity of opening in sewage treatment tank inside, sewage treatment tank both sides are installed with pump body, a plurality of jet elements are fixedly installed in the oxygen cavity, and the pump body is communicated with a plurality of jet elements through the pipeline, and the one end of jet element is installed with suction shell, and the one side of suction shell is communicated with the water outlet pipe, and the rotating part is installed in the water outlet pipe, the utility model discloses through the treatment of jet breaking and rotary shearing, the bubble diameter is significantly reduced, and the specific surface area is greatly increased, and the rising path of bubble is changed by swing plate, prolongs its residence time in sewage, makes oxygen have more sufficient time to dissolve, effectively solves the problem that the oxygen utilization rate of traditional aeration is low.

This invention discloses a depth-of-field extended imaging system and an endoscope. The depth-of-field extended imaging system includes an objective lens assembly, a beam splitter assembly, a first image sensor, a second image sensor, and an image processing device. The objective lens assembly is disposed on the incident side for receiving light from the subject and forming incident light. The beam splitter assembly is disposed behind the objective lens assembly for splitting the incident light into a first optical path and a second optical path. The first and second image sensors are disposed on the imaging side, located on one side of the beam splitter assembly, for imaging the first and second optical paths. The image processing device is connected to the first and second image sensors for image processing. This invention places the polarization element between the first and second reflective elements, ensuring simultaneous imaging of two images and effectively reducing the diameter of the imaging system, thereby reducing the diameter of the endoscope and making the endoscope more patient-friendly during use.

The utility model discloses a multistage rotational flow mixed type ozone oxidation wastewater treatment equipment relates to 111 technical field, this multistage rotational flow mixed type ozone oxidation wastewater treatment equipment, including upper cylinder, lower cylinder, flow guide inner piece and flow guide impeller group, upper cylinder is located at the top of lower cylinder, and the upper cylinder and lower cylinder port detachable connection and intercommunication, and the inner wall of upper cylinder and lower cylinder all is provided with the flow guide inner piece of helical distribution along its axial direction. The application can significantly strengthen the gas-liquid mixing effect through the combined design of the variable-diameter rotational flow cavity and the special-shaped flow guide blade. The variable-diameter structure can form an alternating flow field in the cavity, and the special-shaped flow guide blade can cut and guide the fluid. This design can promote the continuous fragmentation and dispersion of ozone bubbles in turbulent disturbance, effectively increase the gas-liquid contact area, and improve the collision frequency of ozone molecules and wastewater pollutants. The problem of insufficient gas-liquid mixing and low mass transfer efficiency in traditional technology is solved.