33results about How to "Adjustable inner diameter" patented technology

The invention relates to a method for preparing a ceria mesoporous hollow ball. The method comprises the following steps of dissolving a cerium nitrate hexahydrate in deionized water, respectively adding propionic acid and glycol into the solution to obtain a mixed solution, adding the mixed solution into a hot pressure reactor, sealing the hot pressure reactor, wherein a constant temperature reaction undergoes in the hot pressure reactor, applying certain pressure to the reaction system in the constant temperature reaction, wherein constant pressure I of 30-120 MPa is applied in first 100-120min and constant pressure II of 60-150 MPa is applied after first 100-120min and the pressure II is greater than the pressure I, and carrying out forced diffusion of a solvent into ceria mesoporous balls by a pressure difference to obtain the ceria mesoporous hollow balls by dissolution-re-precipitation. The ceria mesoporous hollow ball has the characteristics of controllable inner and outer diameters, high yield, high purity and good dispersibility. The method has simple processes, is environmentally friendly and can be massively prepared.

The invention relates to a method for preparing a polycaprolactone-keratin composite nanometer fiber pipe. The method includes the steps of firstly, dissolving polycaprolactone in a solvent, stirring the solvent to dissolve the polycaprolactone, and obtaining a polycaprolactone solution; secondly, dissolving keratin in a solvent, stirring the solvent to dissolve the keratin, and obtaining a keratin solution; thirdly, mixing the polycaprolactone solution with the keratin solution according to the mass ratio of 95:5 to 5:95, stirring the mixture to mix the mixture evenly, and obtaining a spinning solution; fourthly, conducting electrostatic spinning, and obtaining the polycaprolactone-keratin composite nanometer fiber pipe with a cylindrical collection roller serving as a receiver. The tubular material obtained through the method not only keeps good biological activity of the keratin, but also has good tenacity and mechanical strength of the polycaprolactone; meanwhile, the tubular material has the advantages of being adjustable in inner diameter, simple in preparation method and the like and is expected to be used for the field of artificial blood vessels and the like.

The invention relates to a preparation method of a tubular polyurethane/keratin composite nanofiber material. The preparation method comprises the steps of dissolving polyurethane in solvent and stirring until dissolving completely to obtain a polyurethane solution; dissolving keratin into a solvent and stirring until dissolving completely to obtain a keratin solution; mixing the polyurethane solution and the keratin solution with mass ratio of 95:5-5:95, stirring uniformly to obtain a polyurethane/keratin spinning solution, performing electrostatic spinning and using a cylindrical collecting roller as a receiver. The method can compound natural biomacromolecular keratin and polyurethane into the tubular nanofiber material through electrostatic spinning, so that the material has high porosity and good mechanical and biological functions.

The invention discloses a shear ring diameter adjustable unsaturated-soil direct shear instrument testing device which comprises an upper shear box and a lower shear body. Each of the upper and lower shear boxes comprises a circular telescopic steel sheet, steel sheet abutted plates and an outer shear shell; the outer shear shell is of a equilateral triangle, the middle portion of each edge of the triangle is connected with one steel sheet abutted plate, the steel sheet abutted plates have the circular telescopic steel sheet fixed respectively in three directions, and the upper and lower shear boxes are fixedly connected through bolts. By the arrangement, the problem that soil desiccation cannot be attached to the inner wall of the shear box can be solved, precision in unsaturated-soil strength test is improved, and the testing device is easy and light in design, convenient in operation, good in integrated performance and wide in application.

The invention relates to a preparation method of a tubular silk fibroin/keratin composite nanofiber material. The preparation method comprises the steps of adding silk fibroin into a solvent and stirring until dissolving completely to obtain silk fibroin solution with the concentration of 5-20mg/ml; adding keratin into the solvent and stirring until dissolving completely to obtain keratin solution with the concentration of 10-20mg/ml; mixing the silk fibroin solution with the keratin solution in a mass ratio of 95:5-5:95, stirring to obtain a spinning solution, then performing electrostatic spinning and using a cylindrical collecting roller as a receiver. The tubular material has the advantages of adjustable inside dimension, good biocompatibility and in-vivo degradation, and is expected to be used in the field of biological medical materials such as artificial blood vessels and urethra substitutions.

Disclosed in the invention is an intelligent multifunctional infanette comprising a bedstead, a cradle, and a fence. The cradle is connected to the bedstead by oscillating bars; the fence is arranged at the bottom of the bedstead; and an oscillating unit is arranged at the bedstead below the cradle. A controller is arranged at the side of the bedstead and is connected with a urine wetness signal collector; the controller is also connected with the oscillating unit. A cross bar is clamped to a cross fence of the cradle and is connected with a bendable metal bellows; and a sleeve ring is arranged at the tail end of the metal bellows. A hanging bracket is connected to the bottom of the cradle; and an electric heating wire net is arranged inside the hanging bracket. A temperature sensor is arranged at the bottom of the cradle and is connected with a display device. The electric heating wire net is connected with a switch. With the intelligent multifunctional infanette, parents can feed a baby conveniently and a hand-free effect is realized. Moreover, cradle can be heated in cold weather, thereby protecting the baby from being in cold.

The invention discloses a fitted type intelligent health ring with adjustable pressure. The ring comprises a ring body, a circuit board, a light source exciter and a detector. One side of the ring body is provided with an opening for adjusting the inner diameter of the ring body, the opening is provided with a connector connecting the two ends of the opening, the other side, opposite to the opening, of the ring body is provided with a rotary mechanism, the connector is provided with a distance adjustment mechanism, the ring body comprises an outer ring made from a hard material and an inner ring made from a soft material, and the inner ring and the outer ring are arranged to be fitted with each other; the circuit board is arranged at the outer side of the ring body, and is in communication connection with a measurement terminal; the light source exciter is in communication connection with the circuit board, and irradiates an internal space of the ring body; the detector is in communication connection with the circuit board, and receives a light intensity signal which is absorbed by a human body finger end and then emitted by a light source generator. According to the fitted type intelligent health ring with the adjustable pressure, through personalized settings, a finger end optical parameter can be stably measured under the most ideal pressure, and the precision of measurement of blood pressure and cardiovascular relevant parameters is improved.

The invention discloses an adjustable spinal back orthopedic lumbar vertebra fixator, relates to the technical field of medical instruments, and aims to solve the problem in that the spine of a patient is subjected to physiotherapy and restoration while being fixed and supported. The fixator specifically comprises two pads; a controller is fixed to the outer wall of one side of a fixing assembly through bolts; adjusting mechanisms are arranged on the outer walls of the two sides of each pad; three or more infrared lamps are fixed to the inner wall of one side of each pad through bolts; a heating mechanism is arranged on the wall of each pad; and a temperature sensor is bonded to the outer wall of one side of the top of one pad. According to the invention, weak current is released through the controller and is transmitted to a massage neodymium stone through a wire, so that the massage neodymium stone starts to act on the human body in a low-frequency mode; and muscles and muscle internal nerve ending sensory receptors are stimulated through electrode plates, so that the injured muscles and nerves are relaxed, and pain is alleviated or relieved.

The invention discloses an offshore wind plant steel pipe pile foundation batch floating transportation system and a working method thereof, and belongs to the technical field of offshore wind power construction transportation. The system comprises an air bag device, a steel pipe pile fixing device, an inflation device, a floating transportation dragging cable, an inflation pipe and a carrier. The multiple steel pipe piles are fixed to the steel pipe pile fixing devices, and each steel pipe pile is filled with the corresponding air bag device. The two ends of the floating transportation dragging cable are connected with the steel pipe pile fixing device and the carrier correspondingly. One end of the inflation tube is connected with the inflation device, and the other end of the inflation tube is connected with each air bag device. The system is reasonable in design and simple in construction, does not depend on special ship machine equipment and tools, reduces the transportation difficulty and cost, and has a good application prospect.

The invention discloses a minimally invasive spinal surgery navigation assist device which comprises a navigation positioning pin and a fixation clamp. The fixation clamp is used for fixating medicalnavigation instruments; external threads suitable to be screwed into the spine of a human body are arranged at the lower end of the outer wall of the navigation positioning pin; the fixation clamp isarranged on the upper portion of the navigation positioning pin. The minimally invasive spinal surgery navigation assist device has the advantages that the navigation positioning pin can be directly pierced into the body of a patient from the surface of the skin of the patient and can be screwed into the spine of the body of the patient, accordingly, wound on the surface of the body of the patientcan be omitted, suffering of the patient can be relieved to a great extent, and wound infection due to the wound on the surface of the body of the patient can be effectively prevented; the lower endof the navigation positioning pin is screwed into the spine of the body of the patient, is firmly fixated and is high in use reliability, clamp heads of the required medical navigation instruments arefixated by the aid of the fixation clamp, do not need to be pierced into the body of the patient and are far away from the body of the patient, radiation on the body of the patient can be reduced, accordingly, the minimally invasive spinal surgery navigation assist device is high in practicality, and good use effects can be realized by the minimally invasive spinal surgery navigation assist device.

The invention discloses a transmission mechanism. According to the transmission mechanism, an elastic shaft sleeve is arranged on the outer side of a pushing and abutting piece in a sleeving mode; a cutting gap is formed in the elastic shaft sleeve; due to the elasticity of the elastic shaft sleeve after cutting, the width of the cutting gap in the circumferential direction of the elastic shaft sleeve can be adjusted, and then the inner diameter of the elastic shaft sleeve can be adjusted; therefore, the inner diameter of the elastic shaft sleeve can be matched with the outer diameter of the pushing and abutting piece, that is, the elastic shaft sleeve and the pushing and abutting piece are in close contact in the radial direction of the pushing and abutting piece, and when the pushing and abutting piece reciprocates in the axial direction of the pushing and abutting piece relative to the elastic shaft sleeve, the pushing and abutting piece cannot move in the radial direction of the pushing and abutting piece; and therefore, collision between the pushing and abutting piece and the elastic shaft sleeve in the radial direction of the pushing and abutting piece is avoided, and noise is avoided. The invention further discloses a fascia gun comprising the transmission mechanism.

The invention belongs to the technical field of livestock breeding equipment, and particularly discloses a cleaning device for preventing and treating ectoparasites of mutton sheep. The cleaning device comprises a base, a cleaning mechanism, a spraying mechanism and a driving mechanism; a side plate is arranged on the base, and a top plate is arranged at the top end of the side plate; the cleaning mechanism comprises a connecting rod, a pair of arc-shaped plates, a plurality of meshed gears and a cleaning brush, and the connecting rod is rotatably connected with the top plate; one ends of the arc-shaped plates are hinged, and the other ends of the arc-shaped plates are detachably connected; the gears are rotatably arranged in the arc-shaped plates; one end of the cleaning brush is connected with the gears, and the other end of the cleaning brush penetrates through the arc-shaped plates; the water outlet end of the spraying mechanism penetrates through the arc-shaped plates and is located in acylindrical structure; and the driving mechanism is installed on the outer sides of the arc-shaped plates and used for driving the gears to rotate. According to the cleaning device for preventing and treating the ectoparasites of the mutton sheep, the mutton sheep can freely move in the cleaning device in the cleaning process.

The invention discloses a billiard training aid capable of realizing a three-line-in-one effect. The billiard training aid comprises a cue matching component connected onto a cue and a table matching component placed on a horizontal table, wherein the table matching component comprises a ball positioning component for positioning the vertical plane where the great circle of hit balls is located, a cue limiting component for limiting the motion track of the cue matching component in the vertical plane is mounted at the back end of the ball positioning component, the cue limiting component is glidingly connected with the cue matching component, the sight is adjusted to be located in the vertical plane with the vertical plane where the circumference of the great circle of positioned balls as reference, the cue matching component moves on a straight slide rail to hit balls, and three lines, namely, the sight, the ball hitting line and the cue line, are combined in one in the same vertical plane. The billiard training aid can aid a trainee in ball hitting exercise and aiming exercise, aid the trainee to form correct ball hitting postures and increase the score rate of the trainee, so that the trainee can master the billiard skill quickly and have fun in billiards easily.

The invention relates to an aero-engine turbine disc lifting appliance and an operation method thereof. The aero-engine turbine disc lifting appliance comprises at least two arc-shaped pieces, connecting pieces and a first locking mechanism, the arc-shaped pieces are sequentially connected to form an annular piece, at least one pair of two adjacent arc-shaped pieces are connected through the connecting pieces, at least one connecting positions of the connecting pieces and the arc-shaped pieces can be adjusted so as to adjust the inner diameter of the annular piece, and the first locking mechanism is used for locking the connecting pieces and the arc-shaped pieces after the connecting positions of the connecting pieces and the arc-shaped pieces are adjusted. The lifting appliance is simplein structure and convenient to operate, and can be operated by one person, so that the clamping efficiency of the lifting appliance is improved; and the lifting appliance locking structure is stable and low in loosening risk.