129results about How to "Reduce physical damage" patented technology

The invention discloses a traveling wave electric curtain lunar dust conveying device based on three-dimensional electrodes, and relates to the field of lunar dust conveying. In order to solve the problems of low utilization rate of an electric field, easy abrasion of equipment and high energy consumption in the existing lunar dust transportation work in the prior art, the technical scheme provided by the invention is as follows: the traveling wave electric curtain lunar dust transportation device based on the three-dimensional electrode comprises a substrate; the wedge-shaped microstructure is arranged on the upper surface of the substrate, and the wedge-shaped microstructure is in a triangular prism shape; and the electrodes are arranged on the side walls of the wedge-shaped microstructures and used for generating electrodes and transporting lunar dust particles. The invention also provides a traveling wave electric curtain lunar dust transportation method based on the three-dimensional electrode, the method is realized based on the device, and the method comprises the following steps: collecting the motion state of lunar dust particles; a step of adjusting a driving voltage according to the motion state; and driving the electrode according to the adjusted driving voltage. The lunar dust conveying device is suitable for lunar dust conveying work.

The invention relates to the technical field of peanut sowing machinery, in particular to a multi-seed pre-seed-filling type single peanut seed sowing device which comprises a machine shell, seed sowing discs and an arc-shaped seed protection plate, a seed inlet and a seed feeding opening are formed in one side of the machine shell, a seed throwing opening and a seed sowing pipe are arranged below the machine shell, the seed sowing discs are divided into the left seed sowing disc and the right seed sowing disc, and the arc-shaped seed protection plate is arranged on the left seed sowing disc and the right seed sowing disc. After the seed-metering plate is spliced, a V-shaped structure is formed at the large-diameter part in the middle of the seed-metering plate. Two or more seeds can be filled into the seed-metering disc in the seed filling stage through the seed-metering disc designed in a V-shaped structure and the inclined long-groove-shaped holes, the seed filling performance of the seed-metering device is improved, it is ensured that the number of the seeds can be accurately controlled in each hole through the design of the inclined long-groove-shaped holes arranged in a staggered mode, single-seed sowing is achieved, and the seed-metering efficiency is improved. And moreover, the number of the shaped holes with the elongated slot-shaped structures can be increased under the condition that the diameters of the seed-metering plates are the same, so that the operation speed of the seeder is increased, and the working efficiency is improved.

The invention relates to a single cell capturing method, which comprises the following steps that a single cell to be captured is injected into a micro-fluidic chip containing a micropore coupling micro-cavity through fluid, the chip comprises a base material and a main channel arranged on the base material, the surface of the main channel is provided with a plurality of micropores and micro-cavities corresponding to the micropores, and the micro-cavities are communicated with the main channel; after the main channel is filled with the fluid, the fluid in the main channel is kept static, so that the single cells fall into the micropores under the action of gravity; after the single cells are captured by the micropores, the fluid is introduced again to discharge the uncaptured single cells; and the chip is overturned and inclined after being discharged, so that the single cells enter the micro-cavity. The technical problems that in the prior art, single cell capture efficiency is low, capture precision is insufficient, complex external equipment is needed for control, and single cell capture, culture and the like cannot be completed in the same chip are solved.

The invention provides vibration type cloth bag dust removal equipment capable of monitoring pressure in real time, and belongs to the technical field of dust removal equipment. An air inlet and an air outlet are formed in the left side and the right side of the side wall of the dust removal shell respectively, the dust hopper is arranged at the bottom end of the dust removal shell, the cloth bag dust removal assembly is arranged in the dust removal shell and located between the air inlet and the air outlet, the vibration assembly is connected with the cloth bag dust removal assembly, and the pressure monitoring assembly is arranged on the dust removal shell. Large-particle and large-specific-gravity dust in dust-containing gas is settled under the action of gravity and falls into the dust hopper to be discharged, other gas containing fine dust is filtered through the dust removal cloth bags, the dust is left on the dust removal cloth bags, and the gas treated by the dust removal cloth bags is filtered again through the dust filtration screen plate, so that the dust removal efficiency is improved. The thoroughness of dust removal is improved, and it is ensured that the dust content of exhausted gas is extremely low; the pressure inside the dust removal shell is detected in real time through the pressure monitoring assembly, and it can be ensured that equipment operates within the safe pressure range.

The invention relates to the related fields of ocean engineering and environmental protection, in particular to a construction method of an ecological floating breakwater, which adopts modular design, allows breakwater modules to be preassembled on the shore or on a ship, and reduces the site construction difficulty and time. Each module is provided with an ecological groove which can be filled with plant seeds and other ecological materials, and marine biological diversity and ecological system restoration are promoted. The floating structure is fixed to a designated position through an anchor chain or an anchor pile, high adaptability and stability are achieved, and sea level changes and wave impact can be effectively coped with. The construction and maintenance process of the breakwater is simplified, physical damage to the marine environment is reduced, and an environment-friendly and economical coast protection solution is provided.

The invention belongs to the technical field of continuous feeding, and particularly relates to an aluminum ingot continuous feeding device for aluminum alloy production, which comprises a loading box for storing aluminum ingots, a feeding shell and a conveying assembly for conveying the aluminum ingots from the loading box to the periphery, the loading box is located outside the feeding shell, a protection assembly is arranged in the feeding shell, and a supporting component is arranged in the loading box. The conveying assembly is located in the feeding shell, through cooperation of the loading box and the feeding shell, the effects of controlling aluminum ingots and reducing physical damage of the device are achieved, an output shaft of a motor controls rotation of an auxiliary part, the auxiliary part controls rotation of the auxiliary part, rotation of a fan-shaped part, extension of an output shaft of a hydraulic rod and rotation of the loading box, and the aluminum ingots in the device fall off in a layered and batched mode. The rotating piece rotates, the clamping groove of the rotating piece is just matched with the aluminum ingot in shape, and therefore the aluminum ingot can fall into the clamping groove of the rotating piece, and then the aluminum ingot falls into the loading box from the rotating piece.

The invention provides an intelligent seat control device with an anti-fatigue function. The intelligent seat control device comprises a seat parameter adjustment module, a fatigue detection module, an acupoint storage model, an acupoint stimulation module, a temperature control module and a control module. The seat parameter adjusting module can adjust the height of a seat and the fitting degree of a backrest and the back of a user; the fatigue detection module is used for detecting a user fatigue state; the acupuncture point storage model stores human body back and neck acupuncture point information; the acupoint stimulation module performs acupoint stimulation according to the user body contact information; the temperature control module adjusts the temperature of the seat and controls the temperature of the acupoint stimulation module; after receiving the fatigue state information, the control module controls the seat parameter adjustment module to obtain body contact information, obtains acupoint information from the acupoint storage model, and controls the acupoint stimulation module and the temperature control module to perform corresponding operation, so that the anti-fatigue function of the intelligent seat is realized.

The invention relates to the technical field of material management, and discloses a logistics management system based on a big data technology, which comprises a transportation data acquisition module, a transportation data analysis module and an early warning module, and is characterized in that the transportation data acquisition module is used for monitoring and acquiring temperature data, humidity data, gas concentration data and vibration data in a transportation compartment; the transportation data analysis module is used for calculating a temperature contrast data set, a humidity contrast data set, a gas concentration contrast data set and a vibration index according to the corresponding data sets, comparing the data sets with corresponding threshold values, and judging whether abnormity exists or not; according to the invention, the early warning module sends an abnormal signal to the early warning module while judging that there is a fault or an article easy to damage, and the early warning module gives out a corresponding alarm according to the corresponding signal, so that problems existing in the transportation process are found in time from multiple aspects comprehensively, corresponding early warning is carried out, and the freshness and video safety of food, vegetables and fruits in the transportation process are effectively ensured.

The invention provides a water and fertilizer integrated automatic irrigation device, and particularly relates to the technical field of irrigation appliances, the water and fertilizer integrated automatic irrigation device comprises a base plate, a controller is fixedly mounted on the upper surface of the base plate, a fertilizer pump is fixedly mounted on one side, close to the controller, of the upper surface of the base plate, and a fertilizer mixing barrel is further fixedly mounted on the upper surface of the base plate; after one half of the filter screen filters for a period of time, the filter screen is automatically driven to horizontally move, so that one half of the filter screen without impurities on the surface is automatically replaced to a use position, the filter screen can have a continuous and effective filtering effect, impurities accumulated on a flowing path of a water source can be reduced, and the service life of the filter screen is prolonged. The filter screen can filter impurities in a water source, so that the effectiveness of filtering the impurities in the water source by the filter screen is improved, the effectiveness of fertilizer and water mixing is guaranteed, the situation that granular stones in water block branch pipes or irrigation pipes, and consequently follow-up fertilizer irrigation is uneven is avoided, and physical damage to root systems of crops after large granular impurities in water enter soil can be reduced.

The utility model belongs to the technical field of air filters and assembly thereof, and particularly relates to a buffer connecting assembly and an air filter. The utility model provides a buffering connecting assembly which comprises at least one first connecting buckle set and at least one second connecting buckle set. The first connecting buckle set comprises an insertion rod arranged on an installation object and an elastic sleeve gasket arranged on an installation carrier. The second connecting buckle set comprises an elastic clamping ring arranged on the installation object, a rigid lining contained in the elastic clamping ring and a locking piece arranged in the rigid lining in a penetrating mode. The buffer connecting assembly provided by the utility model can absorb and disperse impact force generated by bumping and vibration, reduce dynamic load directly transmitted to an installation object, and protect the installation object from being damaged. The utility model further provides the air filter on the basis of the buffer connecting assembly, and the air filter has excellent impact resistance and is convenient to disassemble, assemble and maintain.

The invention relates to the technical field of food processing and storage and transportation preservation, in particular to a three-section variable-temperature liquid nitrogen quick-freezing preservation method for beef and application, and the method comprises the following steps: S1, performing pretreatment such as trimming, fascia removal and pre-cooling on beef; s2, performing three-stage variable-temperature liquid nitrogen quick freezing to enable the central temperature of the meat to reach-18 DEG C; and S3, after the sample is frozen and stored for 28 days, performing quality detection and analysis. The three-stage variable-temperature liquid nitrogen quick freezing provided by the invention can effectively reduce the freezing time and cooking loss of the beef, delay the spoilage of proteins and lipids, maintain a better muscle tissue form, and maintain the fresh appearance characteristic of the beef.

The present invention provides an integrated water and fertilizer automatic irrigation device, which specifically relates to the technical field of irrigation tools, and comprises a base plate, wherein a controller is fixedly mounted on the upper surface of the base plate, a fertilizer pump is fixedly mounted on the side of the upper surface of the base plate close to the controller, and a fertilizer mixing barrel is also fixedly mounted on the upper surface of the base plate; after one half of the filter screen has filtered for a period of time, the filter screen is automatically driven to move horizontally, so that the one half of the filter screen without impurities attached to the surface is automatically replaced to a use position, thereby ensuring that the filter screen can have a continuous and effective filtering effect, reducing the accumulation of impurities on the flow path of the water source, and improving the effectiveness of the filter screen in filtering impurities in the water source, thereby ensuring the effectiveness of fertilizer-water mixing, avoiding the blockage of branch pipes or irrigation pipes by granular stones in the water, resulting in uneven subsequent fertilizer irrigation, and reducing the physical damage caused to the root system of crops by large granular impurities in the water after entering the soil.

The invention discloses liquid crystal display screen high-precision AOI online detection integral equipment, and relates to the technical field of liquid crystal display screen online detection, the liquid crystal display screen high-precision AOI online detection integral equipment comprises a machine body, supporting legs are fixedly mounted at the bottom of the machine body, detection equipment is fixedly mounted at the top of the inner wall of the machine body, and conveying wheels are rotatably mounted at the bottom of the inner wall of the machine body; a motor is fixedly installed at the bottom of the inner wall of the machine body, conveying wheels are fixedly installed at the output end of the motor and are in transmission connection through a transmission belt, a bulldozing device is arranged at the bottom of the inner wall of the machine body, a cleaning device is arranged at the bottom of the inner wall of the machine body, and a buffering device is arranged at the bottom of the inner wall of the machine body. The bulldozing device comprises a first gear, a rotating column, a second gear, a cylinder, a lantern ring and a stop lever, a sliding rod slides to push a push plate to start to move, a display screen is located in the middle of a conveying wheel, it is ensured that the measuring instrument is within the optimal measuring range, and the overall efficiency of detection is improved.

The invention discloses an agrobacterium rhizogenes mediated sunflower hairy root transformation system, and belongs to the technical field of genetic transformation. The transformation system comprises the following steps: accelerating germination of sunflowers, transferring germinated sunflower seeds into a seedling tray, wrapping with a preservative film for moisturizing, and culturing in an illumination incubator; the method comprises the following steps: culturing an agrobacterium rhizogenes Ar. Qual strain containing a pBI121-GUS (glucuronidase) plasmid; preparing a bacterial liquid; the method comprises the following steps of: beveling sunflower seedlings along a position 3cm below cotyledons, and immersing cuts into a bacterium solution containing pBI121-GUS plasmid agrobacterium rhizogenes Ar.qual; the sunflower seedlings are transferred to a seedling raising plate to be cultured; culturing for 5-6 days, and transferring the seedlings into a filter paper system of a culture dish to promote root growth. According to the agrobacterium rhizogenes-mediated sunflower hairy root transformation system, the genetic transformation efficiency of sunflowers is improved, the transformation period is greatly shortened, and obtained hairy root plants are good in growth consistency, robust in seedlings and capable of being used in molecular breeding research.

This utility model discloses an adjustable-height mixed feed mixing and feeding device, comprising: a feed hopper frame, a discharge port connected to the lower surface of the feed hopper frame, a feeding mechanism rotatably mounted at one end of the discharge port, the lower surface of the feeding mechanism being slidably mounted on the upper surface of a guide rail plate, and the guide rail plate being fixedly mounted at one end of the feed hopper frame. This application, through the design of the feeding mechanism, allows for height adjustment of the feeding trough, enabling it to flexibly adapt to the feeding height of cattle and sheep at different growth stages. Whether it is the lower height required by young cattle and sheep or the higher height suitable for adult cattle and sheep, it can accurately meet their needs, allowing cattle and sheep to feed in a comfortable posture, reducing feeding difficulties or physical injury caused by unsuitable height, and improving their feeding experience and enthusiasm.

The invention discloses an experiment module solar wing double-shaft coupling sun-facing fixed angle servo control method and system, and aims to reduce mechanical wear by reducing rotation of a solar wing, reduce collision risk by reducing the projection area of the solar wing on an orbital plane orthogonal plane, reduce physical damage on the basis of meeting the power requirement, and improve the reliability of the solar wing double-shaft coupling sun-facing fixed angle servo control system. The task requirement for long-life operation of the space station is met, and the on-orbit life of the solar wing of the space station is prolonged. Namely, sun orientation control is completed by adopting a fixed rotation angle value and an intermittent rotation mode for the two degrees of freedom of the solar wing. The design process comprises the steps that firstly, a beta axis is designed to be in a fixed angle servo control mode, the rotation fixed angle of the beta axis is totally 2n + 1 gears, and the value range is {-n delta,...,-3 delta,-2 delta,-delta, 0, delta, 2 delta, 3 delta,..., n delta}; when the beta axis does not return to zero, setting the alpha axis to return to zero horizontally; when the beta axis returns to zero, if the alpha axis returns to zero horizontally and cannot meet the power requirement, the alpha axis is designed to be in a fixed angle servo control mode, the number of fixed rotation angles of the alpha axis is three, and the value range is {-angle alpha0 ', 0 and angle alpha0'}.

The application relates to the technical field of mechanical transmission, and discloses a bearing interference mounting device based on a turbine screw rod speed reducer, which comprises a bearing mounting device, the bearing mounting device comprises a portal frame, a turbine screw rod speed reducer is fixedly installed on the portal frame, a bearing mounting sleeve is connected to the output end of the turbine screw rod speed reducer, a workpiece clamping module for bearing and fixing a workpiece to be mounted is arranged below the portal frame, a thrust bearing for isolating rotary motion is installed in the bearing mounting sleeve, the turbine screw rod speed reducer is used for converting input rotary torque into axial linear thrust, and the thrust bearing and the bearing mounting sleeve act on the mounted workpiece. According to the application, the counterforce of the press fitting is enclosed in the structure, the dependence on a heavy base is eliminated, pure axial nondestructive press fitting is realized through isolation of rotary friction, and the equipment volume and assembly energy consumption are reduced.

The present invention relates to a high-resolution light field image reconstruction method, device, electronic device and storage medium, and belongs to the field of light field imaging technology. The present invention utilizes the electrically controlled focusing characteristics of a liquid crystal microlens array to realize the acquisition of different light field images. The acquisition process does not require frequent movement of the liquid crystal microlens array, which can reduce the acquisition time of the light field image and the required manpower and material resources, thereby improving the efficiency of the above-mentioned high-resolution light field image reconstruction method, and utilizes light field images at different focus positions to reconstruct high-resolution light field images based on a signal recovery method, so that the reconstruction process of the high-resolution light field image does not require the introduction of a high-resolution network, thereby making the above-mentioned high-resolution light field image reconstruction method easier to implement.

This utility model discloses a transport box for laboratory mice with an anti-collision and buffer structure, including an outer anti-collision box and an inner placement box. The placement box holds the laboratory mice, and the outer wall of the placement box is provided with multiple buffer blocks, which are placed between the outer anti-collision box and the placement box. Both the outer anti-collision box and the top of the placement box are provided with door opening and closing components. The top and bottom of the placement box are provided with upper and lower buffer components, and the opposite side wall is provided with side buffer components. The upper and lower buffer components and the side buffer components are all set in conjunction with the buffer blocks. This utility model provides basic anti-collision protection through the outer anti-collision box, and with the buffer blocks on the outer wall of the placement box, it can initially mitigate the impact of external collisions. The upper and lower buffer components and the side buffer components work together to effectively absorb the vertical and lateral vibrations and bumps during transportation, reducing the stress response or physical injury to the laboratory mice caused by collisions and bumps.

This application provides a dual-frequency laser frequency difference adjustment system and method based on stress transfer. The system includes a dual-frequency laser and a detection component. The dual-frequency laser includes a housing, a magnetic strip, a first reflector, a second reflector, and a first deformation functional component. The first deformation functional component is connected between the first reflector and the housing and is configured to undergo at least plastic deformation when subjected to external force, and to transmit the stress generated by its deformation to the first reflector. The detection component includes a polarizer, a detector, and a processor. The detector receives the laser light emitted from the dual-frequency laser and passes through the polarizer, and converts the laser light into an electrical signal. The processor receives the electrical signal and generates frequency difference information of the two linearly polarized beams of the laser light. According to this application, damage to the dual-frequency laser can be reduced during frequency difference adjustment, and the frequency difference stability of the dual-frequency laser can be improved, as well as the ease of operation of frequency difference adjustment.

The invention belongs to the technical field of document scanning, and discloses an X-ray-based ancient document three-dimensional scanning device, which comprises an X-ray source module, a detection module, a main control module, a document positioning and supporting module, an ink component identification module, an imaging and three-dimensional reconstruction module and a data storage and processing module, according to the method, damage to document materials caused by physical contact is avoided, and abrasion and tearing of ancient books in the scanning process are greatly reduced; through multi-level scanning, an internal text structure of the ancient book is reconstructed, page-by-page display is realized, and a high-definition text image can be obtained even in a literature closed state; the absorption difference of X-rays on different component materials is utilized to effectively distinguish printing ink and paper, so that the content of ancient books is clear and visible, and the method adapts to different historical ink components; non-contact batch scanning of a large number of literatures is achieved, the digitization requirement of collection ancient book protection is met, and a more convenient access way is provided for researchers.

The invention is suitable for the technical field of forestry auxiliary equipment, and provides a forestry ecological transplanted tree protection support which comprises a hoop A and a hoop B. Telescopic structures are circumferentially distributed on the side walls of the hoop A and the hoop B. A main protection plate is fixed to one ends of the telescopic structures, and branch protection plates are slidably mounted on the inner side of the main protection plate. Supporting structures are distributed on the bottoms of the hoop A and the hoop B in the circumferential direction, annular sliding bases are installed on the supporting structures in a sliding mode, and the stretching structures are distributed between the supporting structures in the circumferential direction and connected with one end of the telescopic structure. According to the forestry ecological transplanted tree protection support, the stretching structure can drive the multiple sets of supporting structures to rotate inwards or outwards at the same time in the mode that the stretching structure is matched with the telescopic structure and the annular sliding base, so that the supporting area and the supporting angle of trees are changed, flexible adjustment is conducted according to different tree sizes and external environment conditions, and the supporting effect is good. And the universality and the practicability of the bracket are improved.

The self-deformation soft microrobot comprises a petal-shaped structure capable of being closed to form a closed space, the petal-shaped structure comprises a magnetic particle layer and a pH response layer capable of responding to pH stimulation, and the magnetic particle layer and the pH response layer are both soft material layers; the magnetic particle layer is a PDMS hydrogel layer mixed with magnetic particles; the pH response layer is a PHEMA hydrogel layer; the magnetic particle layer and the pH response layer form a bridging network through a thermocuring method; the pH response layer can assist the magnetic particle layer, so that the soft micro-robot can generate a better deformation effect; the outer edges of the petal-shaped structures are provided with micro burr structures with hydrophobic performance, the micro burr structures are arranged along the outer edges of the petal-shaped structures in an array mode, a hydrophobic array can be formed between every two adjacent petal-shaped structures, a solid-gas-liquid three-phase diaphragm is formed, edge gap sealing after deformation of the soft micro-robot is achieved, liquid permeation can be effectively prevented, and the service life of the soft micro-robot is prolonged. And it is ensured that drugs and collected objects loaded by the soft micro-robot cannot be polluted in the intestinal environment.

This utility model relates to the field of traditional Chinese medicine processing technology, and discloses a soaking device for processing traditional Chinese medicine. It includes a base, with fixed plates fixedly connected to the top left and right sides of the base. A fixed ring is fixedly connected to the top of each adjacent side of the two fixed plates. A soaking tank is fixedly connected to the inner wall of the fixed ring. A soaking cover is provided on the top of the soaking tank. A second servo motor is fixedly connected to the top of the base. The output end of the second servo motor passes through the bottom of the soaking tank and is fixedly connected to a turntable. A spiral stirring shaft is fixedly connected to the top of the turntable. U-shaped stirring shafts are fixedly connected to the top left, right, front, and rear sides of the turntable. In this utility model, the spiral stirring shaft and the U-shaped stirring shaft rotate collaboratively. The spiral stirring shaft promotes the circulation of the soaking liquid, reducing physical damage, and guides the soaking liquid to form a specific path. When the stirring blades wear out, they can be replaced with screws to achieve a suitable processing effect.

The present invention discloses an automated and precise lung puncture system, characterized by comprising a main body, with an operating space in the middle for puncture operations. The main body is equipped with a puncture needle robotic arm for holding and manipulating the puncture needle and a syringe robotic arm for holding the syringe, distributed around the operating space. A level is provided on the outer wall of the main body for measuring the tilt angle of the main body. The puncture needle robotic arm, syringe robotic arm, and level are connected to a main control module circuit located within the main body. The robotic system disclosed in this invention can reduce operation time, decrease the physical and psychological burden on patients, improve the efficiency and safety of the entire surgical process, reduce human error and intraoperative complications, and is suitable for the diagnosis and treatment of pulmonary nodules and other lung diseases.

The utility model relates to a train traction system power supply device in a non-power area, and belongs to the field of train power supply. The device is composed of a shell and components in the shell, the components in the shell comprise a charger, a battery, a power conversion device and a battery management system, and the charger is connected with the battery; the battery is connected with the power conversion device; and the battery management system is connected with the battery. Meanwhile, external assemblies such as universal wheels and a display screen are further arranged on the shell. The device provided by the utility model is convenient to operate, reduces the possibility that a connecting cable causes physical damage beside a rail, greatly reduces the operation steps during multi-track-crossing shunting, improves the shunting efficiency, and reduces the probability of accidents at the same time.

The utility model relates to the technical field of belt conveyors, in particular to a belt conveyor capable of unloading a ship, which comprises an H-shaped steel bearing chassis, a diesel generating set is fixedly mounted at the top of the H-shaped steel bearing chassis, and a totally-closed belt conveyor is movably mounted at the top of the diesel generating set through a hydraulic lifting device. The totally-closed belt conveyor is formed by combining a groove frame, a belt conveying mechanism body and a rack plate, a pitching luffing mechanism is movably installed at the position, close to the feeding end, between the totally-closed belt conveyor and the H-shaped steel bearing chassis, and a head buffering hopper is fixedly installed at the bottom of the end, close to the discharging end, of the totally-closed belt conveyor. The full-closed type belt conveyor has the advantages that the full-closed type belt conveyor can supply power autonomously, can steer in a universal mode, can lift vertically, can change amplitude in a pitching mode, can walk electrically, can temporarily store materials and is high in efficiency, low in breakage rate and the like, and meanwhile, the full-closed type structure can effectively relieve flying dust and reduce pollution of dust to air.

The invention relates to the technical field of slewing bearing assembly, and discloses slewing bearing production and assembly equipment which comprises an assembly table, and a knocking mechanism, a fixing mechanism, a rotating mechanism and a lifting mechanism are arranged on the assembly table. And the knocking mechanism comprises a supporting table, a first bearing, a rotating column, a first fixing disc, a second fixing disc, a fixing bolt, a supporting plate, an electric telescopic rod and a knocking block, the supporting table is fixedly installed at the top of the assembling table, the first bearing is fixedly installed at the top of the supporting table, and the bottom end of the rotating column is rotationally connected to the top of the supporting table through the first bearing. When an assembly gap exists between the outer ring and the inner ring, the inner rod of the electric telescopic rod drives the knocking block to uniformly knock the outer ring, so that auxiliary assembly can be carried out, proper and uniform knocking is beneficial to in-place of the outer ring, and the risk that breakage is increased in subsequent use due to non-uniform knocking is avoided.

The present application relates to the technical field of semiconductor, in particular to a deep via hole preparation method and a preparation method of back-illuminated image sensor, comprising the following steps: providing a semiconductor stack structure, the semiconductor stack structure comprising a composite layer and a termination layer, a local stop layer being formed on the composite layer and being close to the termination layer; etching the composite layer to the termination layer and stopping at the local stop layer; removing the local stop layer, etching the composite layer to the termination layer and stopping at the termination layer to form the deep via hole. According to the design position of the deep via hole and the vertical depth of the first etching, the local stop layer is preset in the corresponding area of the composite layer, so that the damage of the lower structure caused by over-etching in the traditional process can be avoided.

The invention provides a blood vessel plugging device which comprises a handle, a sheathing canal, a puncture guide wire, a positioning guide wire and a pushing rod, the positioning guide wire and the pushing rod are inserted into an inner cavity of the sheathing canal in parallel, and a plugging plug corresponding to the pushing rod is arranged at the far end of the sheathing canal; the plugging device can be used without an artery sheath (long sheath), the puncture guide wire is conveyed into the blood return opening in the far end of the sheath tube and led out from the guide wire exchange opening, normal use of the puncture guide wire is achieved by additionally arranging the independent puncture guide wire channel, and after the puncture guide wire is withdrawn, the puncture guide wire can be used conveniently. Whether the far-end blood return opening is inserted into a blood vessel or not is judged according to the blood outflow condition of the guide wire exchange opening, replacement of a long sheath and a short sheath is not needed in the using process, the treatment efficiency is improved, and body injuries of a patient are reduced.