48results about How to "Solve long-standing problems" patented technology

A preparation method of a halophilic decontamination bacterial agent and the bacterial agent prepared by the same belong to the technical field of biological treatment of salinity wastewater. The preparation method comprises the following steps: 1) inoculating the test tube strain of the halophilic decontamination bacterium into nutrient agar for culturing; 2) inoculating the cultured strain into a fermentor medium of preset volumetric quantity according to the inoculation quantity which is 1-2% of the medium weight to be cultured till logarithmic growth phase; and 3) in the fermentor production process, maintaining the ventilation volume of aseptic air to be 4.0-6.0L / min, the stirring rate to be 60-120r / min, the culture temperature to be 25-40 DEG C and the full-process culture time to be 24-48h, subpackaging the culture solution after fermentation or adopting aseptic attachments for adsorption and drying, thus preparing the solid bacterial agent. The strain of the bacterial agent was collected in China General Microbiological Culture Collection Center (CGMCC), with collection number of CGMCC No.3314. The invention adopts the bioaugmentation technology, greatly improves the capability of treating salinity wastewater and has low cost and significant effects.

The invention discloses a method for detecting the content of chlorine, phosphorus and potassium in a compound and mixed fertilizer product by an energy dispersion X-ray fluorescence spectrum. The method comprises the following steps: 1) selecting the compound and mixed fertilizer product composed of components with different types and content as a calibration sample and accurately determining thecontent of the chlorine, the phosphorus and the potassium in the calibration sample; 2) testing the compound and mixed fertilizer calibration sample with the known content of the chlorine, the phosphorus and the potassium by adopting an energy dispersion type X-ray fluorescence spectrograph and determining testing conditions of chlorine, phosphorus and potassium elements; 3) testing a compound and mixed fertilizer sample to be tested by adopting the energy dispersion type X-ray fluorescence spectrograph and obtaining the content of the chlorine, the phosphorus and the potassium in the compound and mixed fertilizer sample to be tested according to X-ray fluorescence spectrum intensity and a relation of the content of the chlorine, phosphorus and potassium elements in a calibration workingcurve constructed in step 2), so as to obtain the content of the chlorine, the phosphorus and the potassium in the compound and mixed fertilizer sample to be tested. According to the method disclosedby the invention, the content of the chlorine, the phosphorus and the potassium in products including the compound and mixed fertilizer, compound fertilizer, blended fertilizer and the like can be rapidly determined; the dosage of chemical reagents is reduced and a detection process is convenient and rapid; a detection result is accurate and has good consistency.

A minimally invasive intramedullary fixation device for pelvic fractures belongs to the technical field of orthopedic medical devices and is used for intramedullary reduction and fixation of pelvic fractures. The technical plan is: design the pelvic intramedullary tunnel in advance under the three-dimensional reconstruction of pelvic CT, make the guide wire and guide sleeve according to the curvature of the pelvic intramedullary tunnel, and use a soft drill to drill under the guidance of the pre-bent guide wire and C-arm fluoroscopy. Out of the pelvic intramedullary tunnel, put the arc-shaped intramedullary nail into the pelvic intramedullary tunnel along the guide wire, and fix the screws to securely connect the arc-shaped intramedullary nail to the pelvis. intramedullary nail. The pelvic intramedullary fixation adopted in the present invention is an innovation in the pelvic fracture fixation operation. This intramedullary fixation device and method can realize the perfect reduction and fixation of the pelvic ring and acetabular fractures with the cooperation of direct vision and C-arm irradiation. It is convenient and firmly fixed, which greatly shortens the operation time and recovery time, improves the treatment effect, and reduces the pain of the patient.

The invention belongs to the technical field of brushless direct current motors, discloses a brushless direct-current (DC) motor, and aims at preventing a Hall element from being damaged due to the fact that the temperature of a stator rises. The brushless DC motor comprises a shell, a motor shaft, the stator, a rotor and a magnetic steel piece, wherein a magnetic ring is fixed on the portion, outside the shell, of the motor shaft, the Hall element is mounted on the outer wall of the shell, the distance between the Hall element and the magnetic ring is shorter than an induction range of the Hall element, and the Hall element is connected with a controller. The Hall element is arranged outside the DC motor, the Hall element cannot be affected by the rise of the temperature inside the DC motor and cannot be damaged due to the rise of the temperature of the Hall element. According to the brushless DC motor, the structural mode of a traditional DC motor is broken through, a convention is broken, the Hall element is innovatively arranged outside the shell of the motor, an unexpected effect is obtained, a hard problem which is not solved in a long term is solved, operation troubles of the brushless DC motor can be reduced greatly, and reliability of the brushless DC motor is greatly improved.

The invention discloses a device and method for preventing secondary oxidation of molten steel, and belongs to the technical field of molten steel pouring equipment and methods. The device and methodare used for preventing the molten steel from being subjected to secondary oxidation in the pouring process. According to the technical scheme, two layers of argon shield pipelines are arranged in a steel ladle long nozzle, and the number of upper-layer gas inlet pipelines and the number of lower-layer gas inlet pipelines are 6-10; the upper-layer gas inlet pipelines are tilted upwards by 30-40 degrees in the vertical direction, and the lower-layer gas inlet pipelines are tilted by 30-40 degrees in the horizontal direction and the vertical direction; and upper-layer gas inlets and lower-layergas inlets are installed in the outer wall of a steel shell. By adoption of the device and method, the probability of secondary oxidation happening in the molten steel pouring process is eliminated through the ingenious design of dual-argon sealing and tilted direction blowing-in, the unexpected good effect is achieved, the problems which cannot be solved for a long time are solved, and molten steel pouring quality is guaranteed. According to the device and method, the structure is simple, operation is easy and convenient, occluded foreign substances generated in secondary oxidation can be reduced, the water gap blocking probability is obviously lowered, and the effect that production can be conducted smoothly is guaranteed.

A halophilic decontamination bacterium and application thereof belong to the technical field of biological treatment of salinity wastewater. The halophilic decontamination bacterium strain was collected in China General Microbiological Culture Collection Center (CGMCC), with collection number of CGMCC No.3314. The halophilic decontamination bacterium strain is applied to preparing microbial agents and then the microbial agents are used for treating salinity wastewater or treating wastewater after seawater utilization. The invention adopts the bioaugmentation technology, greatly improves the capability of treating salinity wastewater and has low cost and significant effects.

An intramedullary resetter for long bone fractures of extremities that can automatically feed wires belongs to the technical field of orthopedic medical devices, and is used for rapid reduction and wire feeding of long bone fractures with lateral displacement. The technical solution is: the front end of the reset rod can pull the reset head to rotate along the fixed axis, the rear end of the reset rod is connected with the knob, the guide wire is passed through the guide wire tube, and there is a guide wire push plate and a wire feed handle at the rear of the guide wire tube. The wire guide push plate can be pushed for wire feeding operation. The reset head of the present invention enters the medullary cavity on the opposite side of the broken end of the fracture, and turns and pulls the knob at the rear end of the reset pull rod, so that the reset head moves the opposite side of the medullary cavity to reset the fractured bone on the opposite side. The wire is sent into the medullary cavity, and the supporting tools of the intramedullary nail are used for reduction and fixation. The invention can quickly reset the long bone fractures with lateral displacement and rotational displacement, and the guide wire is fast, stable and easy to control, improves the accuracy of reset and operation quality, and solves the problem of manual wire feeding.

The invention provides a sight sheet resistant to glare. The sight sheet resistant to glare is a color sheet body which is capable of blocking glare and provided with a plurality of transparent light-passing colorless sight holes. According to the arrangement, due to the fact that the transparent light-passing colorless sight holes are evenly distributed in the color sheet body and coincide with the vision relationship between the two eyes, observation is quite clear, and the colored portion can effectively block most glare. The sight sheet resistant to glare can be suitable for serving as glass of automobiles, trains, various vehicles and houses, the difficult problem that since an existing glare-resistant product needs to be colored integrally, observation is not facilitated for manly years is solved, and the sight sheet resistant to glare can be used as glass of the products such as a lampshade and various glare-resistant eye protectors.

A C-arm X-ray fluoroscopy machine with an external camera device belongs to the technical field of medical equipment and is used for real-time acquisition of optical images during orthopedic surgery to guide the operation. The technical proposal is: in the C-arm X-ray perspective machine The tube end of the X-ray emission source and the image intensifier end are equipped with a camera and a positioning device separately or at the same time. There are one or more cameras installed at each end, and one of the positioning devices is composed of a swing arm and a swing arm drive device. The camera It is fixed at one end of the swing arm, and the other end of the swing arm has a swing shaft, which is connected with the swing arm driving device, and the plane where the swing arm swings around the swing shaft is parallel to the bottom surface of the image intensifier and the X-ray emission source tube. The invention can monitor the whole process in real time during the operation, solves the problem that the X-rays cannot be irradiated for a long time, and can avoid the influence on the X-ray fluoroscopy operation. The invention has the advantages of simple structure, low price and convenient implementation, and has great popularization value.

A minimally invasive intramedullary fixation device for clavicle fractures belongs to the technical field of orthopedic medical devices and is used for minimally invasive fixation of clavicle fractures. The technical scheme is: insert the proximal intramedullary nail and the distal intramedullary nail into the fractured bone medullary cavity of the clavicle fracture respectively, and fix the proximal intramedullary nail and the distal intramedullary nail with the fixing screws , the proximal reduction nail, the distal reduction nail and the pull rod tighten the two parts of the clavicle fracture toward the middle and reset them. After the fracture heals, an opening is opened at the distal end of the clavicle. The surgical procedure is carried out under minimally invasive conditions. The invention has the advantages of reasonable structure, simple operation and firm fixation, realizes minimum trauma and minimum X-ray exposure, and achieves the purpose of effectively fixing fractures. The invention is an innovation of minimally invasive surgery for fracture fixation, effectively avoids the disadvantages of traditional clavicle fracture fixation and incision, greatly shortens the operation time and recovery time, and effectively reduces the suffering of patients.

The invention discloses an engine cylinder block casting mould comprising a sand mould, a water pump sand core, a window sand core, a front end sand core and a water sleeve sand core, wherein the sand mould is provided with an inner cavity; the water pump sand core, the window sand core, the front end sand core and the water sleeve sand core are located in the inner cavity; the water pump sand core, the window sand core, the front end sand core and the water sleeve sand core are provided with air exhausting holes; a process gap is reserved between the water pump sand core and the window sand core; and a gasket is arranged inside the process gap. According to the engine cylinder block casting mould disclosed by the invention, a polycrystalline mullite gasket with high-temperature resistance and good ventilation is additionally arranged in the process gap between the water pump sand core and the window sand core so that molten iron is prevented from entering the air exhausting holes in the water pump sand core and the window sand core from the process gap; and therefore, the production of waste castings is reduced and the difficulty which is not solved by workers in the industry is solved.

The invention discloses a method for detecting the content of chlorine, phosphorus and potassium in a compound and mixed fertilizer product by an energy dispersion X-ray fluorescence spectrum. The method comprises the following steps: 1) selecting the compound and mixed fertilizer product composed of components with different types and content as a calibration sample and accurately determining thecontent of the chlorine, the phosphorus and the potassium in the calibration sample; 2) testing the compound and mixed fertilizer calibration sample with the known content of the chlorine, the phosphorus and the potassium by adopting an energy dispersion type X-ray fluorescence spectrograph and determining testing conditions of chlorine, phosphorus and potassium elements; 3) testing a compound and mixed fertilizer sample to be tested by adopting the energy dispersion type X-ray fluorescence spectrograph and obtaining the content of the chlorine, the phosphorus and the potassium in the compound and mixed fertilizer sample to be tested according to X-ray fluorescence spectrum intensity and a relation of the content of the chlorine, phosphorus and potassium elements in a calibration workingcurve constructed in step 2), so as to obtain the content of the chlorine, the phosphorus and the potassium in the compound and mixed fertilizer sample to be tested. According to the method disclosedby the invention, the content of the chlorine, the phosphorus and the potassium in products including the compound and mixed fertilizer, compound fertilizer, blended fertilizer and the like can be rapidly determined; the dosage of chemical reagents is reduced and a detection process is convenient and rapid; a detection result is accurate and has good consistency.