55results about How to "Great practicability" patented technology

The utility model provides a kind of corrosion -resistant spiral steel pipe, the utility model includes spiral inner tube body and seamless outer tube body, and interlayer space is formed between spiral inner tube body and seamless outer tube body, and interlayer space is filled with heat preservation filling layer, the outer surface of spiral inner tube body and the inner surface of seamless outer tube body are equipped with corrosion -resistant coating, and the both ends of spiral inner tube body and seamless outer tube body are respectively equipped with first connecting frame and second connecting frame, the edge of first connecting frame is equipped with insert block one, the edge of second connecting frame is equipped with the slot compatible with insert block one, the edge of second connecting frame is equipped with insert block two, the edge of first connecting frame is equipped with the slot compatible with insert block two, and the opening is formed between first connecting frame and second connecting frame, and reinforcing strip is inserted in the opening.The utility model can improve environmental adaptability by double corrosion -resistant coating, optimize the sealing property of connecting structure, enhance the synergistic effect of reinforcing strip and heat preservation layer, to prolong service life and ensure operating stability.

The invention discloses a wafer IPA drying method for improving wafer edge particle aggregation, and belongs to the technical field of semiconductor manufacturing. The method comprises the following steps: after a wafer is cleaned, lifting the wafer from pure water to the 4 / 5 position of the wafer to be separated from the water surface by using a bottom supporting table, and then clamping the 2 / 3 edge position of the wafer by using a top clamp to continuously lift until the wafer is completely separated from the water surface; in the lifting process, the surface of the wafer is purged through mixed gas of N2 and IPA, and the completely-dried wafer is obtained. According to the invention, the wafer is dried by replacing a wafer lifting mode and cooperating with an IPA drying mode, so that the wafer can be completely dried, and the watermark problem caused by local dryness due to contact between the wafer and the supporting table in the medium replacement process can be avoided. The method is wide in practicability, simple in technological process, short in treatment time, low in cost and good in application prospect.

According to the pulse nozzle capable of automatically switching the water outlets, the inner water outlet is formed in the middle of the nozzle surface cover, the outer water outlets are evenly distributed in the periphery of the nozzle surface cover, and the rotary water outlet element, the water distribution disc, the middle flow guide part and the flow guide pipes are matched in cooperation, so that the water outlets can be automatically switched without an external control structure; the rotary water outlet element is driven to rotate by utilizing kinetic energy of water flow, so that a plurality of water outlet columns on the water outlet element are aligned with holes in the water distribution disc in sequence, the automatic switching of a water flow path between the middle flow guide pipe and the outer flow guide pipe is realized, and finally, the automatic alternate spraying effect of the inner water outlet and the outer water outlet is formed. According to the structural design, the massage coverage range of the nozzle is effectively expanded, pulse water flow with distinct rhythm and changeable directions can be formed, and massage stimulation and comfort are remarkably enhanced. Meanwhile, the device does not need a complex control structure, so that the device is compact in overall structure, convenient to install, high in stability and wide in practicability.

The utility model provides a three-plug power line plug assembly, comprising a pedestal, the pedestal is provided with a first fixing hole site and a second fixing hole site, the first fixing hole site is internally provided with a first pin assembly, and the second fixing hole site is internally provided with a second pin assembly. The three-plug power line plug assembly provided by the utility model has the advantages of compact structure, convenient installation, high safety and the like, and adopts the structural design that the first pin assembly and the second pin assembly can be respectively installed at the first fixing hole position and the second fixing hole position in the use process. The first pin assembly and the second pin assembly are provided with limiting bodies and clamping body structures for further fixing, the fastening performance of the plug is further improved, the second pin assembly adopts a cylindrical pin head, so that the safety of the plug is further improved, and therefore, the plug is more convenient to use. The method has great economic value and practical value.

The utility model discloses a foldable antenna support for an electromagnetic radiation detector, which relates to the technical field of electromagnetic radiation detectors and comprises a fixed bottom plate, the upper end of the fixed bottom plate is provided with a slot, the upper end of the fixed bottom plate is fixedly connected with an expansion sheath at the edge of the slot, and two ends of the fixed bottom plate are rotatably connected with side protection plates. One end of the side protection plate is fixedly connected with an arc plate and a fixing plate, the fixing plate is located on the two sides of the arc plate, through the arrangement of the fixing bottom plate and the side protection plate, folding type design is adopted, the antenna support is contained in an electromagnetic radiation detector, when an antenna needs to be supported, the side protection plate is unfolded, and the antenna support is clamped by the arc plate, so that the antenna support is convenient to use. According to the electromagnetic radiation detector, the limiting effect on the antenna can be improved, the use stability is improved, meanwhile, through the arrangement of the expansion sheath and the arc plate, the antenna can be clamped, meanwhile, the bending point of the antenna when the antenna is bent under stress is moved to the upper end of the arc plate, damage to an interface is avoided, and damage to the electromagnetic radiation detector is avoided.

This utility model relates to the field of injection molding production, specifically a spring ejection device, including a fixed plate, a male mold, a female mold, and ejector inserts. An injection cavity is provided between the male and female molds, and at least one ejector insert is provided on one side of the injection cavity. An ejection channel is provided on the female mold, communicating with the injection cavity, and the ejector insert is disposed within the ejection channel. The fixed plate is located on the side of the female mold away from the injection cavity, and the fixed plate contacts the ejector insert. This utility model adds ejector inserts to areas where the product easily sticks to the female mold. The spring force ensures that the female mold ejector block ejects along with the product when the mold opens, guaranteeing that the product adheres to the male mold side before being ejected by the male mold ejector pins. The overall structure is simple, widely applicable, and effectively reduces the product defect rate during production.

The invention discloses a single-pendulum single-servo-drive 3 + 2 motorized spindle swing head which comprises an upper box body, a lower box body, a spindle box, a motorized spindle, a C-axis assembly, an A-axis assembly and a transmission assembly, the C-axis assembly comprises a C-axis positioning assembly and a C-axis driving assembly, the A-axis assembly comprises an A-axis positioning assembly and an A-axis driving assembly, a spigot of the upper box body is connected to the bottom end of a ram, the motorized spindle is arranged in the spindle box, and the transmission assembly is arranged in the lower box body. The spindle box is of a simple pendulum offset structure; and the C-axis driving assembly and the A-axis driving assembly share one set of servo motor and speed reducer. The swing head integrates a high-power high-speed motorized spindle, a crankset positioning function for improving rigidity, a single-servo driving double-shaft transposition function and a safe self-locking function, and realizes synchronous reduction of manufacturing cost and use cost, remarkable simplification of control logic and synchronous improvement of structural compactness and reliability. Compared with a double-servo-drive or direct-drive swing head of the same specification, the swing head has the outstanding advantages in the aspects of cost, size, control and safety, and is particularly suitable for 3 + 2 indexing machining.

This invention discloses a method for increasing shale gas production from multi-stage fracturing shale formations. First, water containing water-absorbing resin is intermittently injected into the shale gas well, impacting the shale layer and creating multiple fractures, forming a primary fracturing process. Next, liquid nitrogen and sodium particles are injected into the shale gas well. The resin, already saturated with water, remains within the fractures. At this point, the liquid nitrogen cools the shale layer below its freezing point, causing the saturated resin to freeze and rapidly expand, forming a secondary fracturing process. Then, as the injected liquid nitrogen continues to vaporize, it further freezes the water and water-absorbing resin adsorbed by the shale, forming a tertiary fracturing process. When the temperature of the shale layer exceeds its freezing point, the expanded ice on the water-absorbing resin melts into water. At this point, the sodium particles react with the water, releasing a large amount of heat, causing the shale layer temperature to rise rapidly, creating a thermal shock to the low-temperature shale layer, forming a quaternary fracturing process. This completes the multi-stage fracturing process of the shale layer, effectively improving the extraction efficiency of shale gas.

The present application relates to the field of bioengineering, and particularly relates to a protein mutant capable of improving the nucleoside yield of a strain and application thereof. The present application performs point mutation on adenine deaminase and pyrimidine nucleotide transport protein, which can effectively accumulate the inosine, adenosine and other nucleoside related products produced by the strain, does not affect the growth of the bacterial body, has wider practicality, and is conducive to reducing the cost of industrial production of nucleosides.

The application discloses a pyridine-yne-benzene-yne diaromatic yne precursor, which is the first aromatic yne precursor capable of continuously generating pyridine-yne-benzene-yne. The diaromatic yne precursor can be compatible with multiple substituted alkyl, aryl, silicon, alkoxy, halogen and other functional groups. The diaromatic yne precursor can have a high-selectivity nucleophilic reaction with oxygen, nitrogen, sulfur and other nucleophilic reagents to quickly construct carbon-heteroatom bonds, and can have a [4+2] cycloaddition reaction with diene to quickly construct double carbon-carbon bonds, so that the diaromatic yne precursor can be used for efficiently and quickly preparing multiple substituted pyridine, benzene ring and other derivatives, and has a wide application prospect.

The invention discloses a subjective and objective combination weighting evaluation method based on variance optimization, and the method comprises the steps: firstly evaluating the relative importance of each index, and obtaining the subjective weight of each index; constructing a sample-index matrix, calculating the information entropy value of each index, obtaining the weight of each index based on the information entropy, removing redundant indexes through the calculation of the index correlation degree and the correlation degree between the indexes, achieving the de-overlapping, calculating the absolute correlation degree of the indexes, and carrying out the normalization to obtain the objective weight of the indexes; setting subjective and objective weight coefficients, carrying out linear addition processing on subjective and objective weights, and on the premise that the sum of constraint condition coefficients is 1, enabling the variance to be as small as possible to obtain the optimal subjective and objective combined weight of each index; and judging subjective and objective weights of the indexes and the consistency of sorting arrays, and determining final weights of the indexes. On the basis of keeping the advantages of the original subjective and objective evaluation method, the advantage complementation of subjective weighting and objective weighting is realized, and the evaluation effect of the evaluation model is improved.

This invention discloses a highly efficient numerical calculation method for buried pipe heat extraction in backfilled mining faces. The method obtains the thermophysical performance parameters of the roof and floor coal and rock masses to determine the calculation area; establishes a numerical calculation model including the backfill body, heat exchange pipes arranged within the backfill body, and the surrounding rock of the roof and floor; divides the model into a grid, sets symmetrical boundary conditions in the established numerical calculation model, and sets the initial and boundary conditions of the model according to the heat extraction conditions; runs the calculation model, determines the number of representative heat exchange pipes in the calculation model based on the heat exchange characteristics of buried pipes at different locations; and calculates the heat extraction performance of the entire backfilled mining face. This method is simple to operate, convenient, fast, accurate, and reliable in calculating the heat extraction performance of the entire backfilled space, evaluating the heat extraction capacity of backfilled mining faces, improving calculation efficiency, saving calculation costs, and effectively solving the problem of slow calculation speed for large-scale backfilled space buried pipe heat extraction simulation in underground mines. It provides a reference for efficient calculation of underground geothermal extraction.

The utility model discloses a portable traditional chinese medical science moxa -moxibustion device, including the box, the box one end swing has drawn the drawer, is established with two groups of groove bodies no.

The utility model discloses a welding transfer mechanism for an automatic welding machine, which belongs to the technical field of machinery and comprises a base and a welding gun, the welding gun is arranged above the base, baffles are fixedly mounted on two sides of the bottom of the base, a first motor is fixedly mounted on one side of one baffle, and a second motor is fixedly mounted on the other side of the other baffle. The output end of the first motor is fixedly connected with a two-way threaded rod, the outer side of the two-way threaded rod is in threaded connection with two driving blocks, two driving rods are hinged to the outer sides of the two driving blocks correspondingly, one sides of the four driving rods are hinged to the same fixing block, and a moving plate is fixedly installed at the bottom of the fixing block. And four moving wheels are rotationally mounted at the bottom of the moving plate. Through mutual cooperation of the first motor, the bidirectional threaded rod, the driving block, the driving rod, the fixed block, the moving plate and the moving wheels, the whole device is conveniently driven to move through the moving wheels, so that time and labor are saved during carrying, the working efficiency of the device is greatly improved, and the practicability is wider.

The beaker heating support comprises a support body, a hemispherical containing cavity with an upward opening is formed in the support body, a floating bearing part is arranged on the inner wall of the containing cavity, the floating bearing part comprises a plurality of sets of supporting pieces, and the supporting pieces are arranged on the inner wall of the containing cavity. The supporting pieces are sequentially and coaxially arranged at intervals in the depth direction of the containing cavity. Each set of supporting pieces comprises at least one protruding part, the diameter ranges defined by the protruding parts in each set of supporting pieces are different, the diameter ranges defined by the multiple sets of supporting pieces are gradually increased in the direction of the central axis of the containing cavity, and the height from the top face of each set of supporting pieces to the bottom face of the containing cavity is larger than the height from the top face of the corresponding set of supporting pieces to the bottom face of the containing cavity. And the inner cavity is gradually far away and gradually high along the central axis direction of the accommodating cavity. The beaker heating bracket disclosed by the utility model can be compatible with beakers with different sizes for air bath heating, and is simple in structure and high in practicability.

The utility model provides a kind of integrated wiring harness connecting assembly, including wiring harness fitting part, the both ends of wiring harness fitting part are equipped with fixed part, the side of wiring harness fitting part is equipped with connecting part, the both ends of connecting part are equipped with insertion part.The utility model provides a kind of integrated wiring harness connecting assembly has the advantages such as compact structure, strong stability, easy to install, high security, etc., the wiring harness can be very conveniently installed to each partition assembly in assembling process by fitting position, each wiring harness is fixed in certain corresponding fitting position, independent of each other without contact, avoid the danger of short circuit, improve the security of use, therefore, the present application has great economic value and practical value.

The application discloses a multi-pass valve, which comprises a valve body, a valve core and a valve cover, the valve body is internally provided with an inner cavity for installing the valve core, the valve core is rotatably installed in the inner cavity, the valve body has an end face A and an end face B along the axial direction of the valve core, the valve cover is installed on the end face A of the valve body, the valve cover is provided with a plurality of flow channel openings, the valve core comprises a valve core A close to the end face A and a valve core B close to the end face B, and the valve core A and the valve core B are both internally provided with a plurality of valve core flow channels which are not communicated with each other. The multi-pass valve of the application sets the flow channel openings on the same side, so that the installation of the hand tool can be facilitated.

The utility model discloses a safety protection system for a truck-mounted crane of a rail operation vehicle, which comprises a data acquisition terminal arranged on a suspension arm, a weighing guide wheel assembly arranged close to the front end of the suspension arm and used for supporting a steel wire lifting rope to slide under stress, and a data receiving box arranged at the position of a cab of the rail operation vehicle, a PLC (Programmable Logic Controller) and a first wireless transmission module are arranged in the data receiving box, and the data acquisition terminal comprises a laser distance measuring sensor, a tilt angle sensor, a torque sensor and a second wireless transmission module which are respectively arranged on a suspension arm; the collection output ends of the laser distance measuring sensor, the tilt angle sensor, the torque sensor and the weighing guide wheel are in communication connection with the PLC through the second wireless transmission module and the first wireless transmission module respectively. According to the utility model, the problem of overwinding of the lifting hook of the truck-mounted crane can be solved, the unnecessary hidden danger of collision is reduced, the operation efficiency of the truck-mounted crane is greatly improved, and the safety and reliability of the use of the truck-mounted crane are ensured.

The utility model provides a sealing device for a hydraulic cylinder, which comprises a cylinder body, a piston rod and a cylinder cover, the lower end of the piston rod is mounted in a plug-in piston base, an H-shaped piston bush is sleeved on the outer side of the piston rod, a sealing plate is arranged below the H-shaped piston bush, a buffer mechanism is arranged at the lower end in the cylinder body, and the buffer mechanism is connected with the cylinder cover. The buffering mechanism comprises a sleeve, a movable column, a buffering plate and a spring, the movable column is sleeved with the spring, one end of the spring is fixedly connected with the buffering plate, the other end of the spring is fixedly connected with the sleeve, the sleeve is fixedly installed at the bottom of the cylinder body, the upper end of the movable column is fixedly connected with the buffering plate, and a buffering rubber layer is arranged on the upper surface of the buffering plate. A double dynamic sealing system can be constructed, and the risk of hydraulic oil leakage is remarkably reduced; the variable stiffness spring and the honeycomb damping buffer rubber layer are used for effectively absorbing impact energy of the piston rod, and vibration and noise are reduced.

This invention relates to a method for judging the quality of interlayers in bottom-water heavy oil reservoirs. Based on thickness, physical properties, and planar distribution characteristics, it identifies interlayers and strata within the reservoir or flow unit of a target reserve unit. It analyzes the influence of parameters of interlayers within the reservoir or flow unit of the target reserve unit on their characteristics. It statistically analyzes the thickness, permeability, sealing degree, and development location of interlayers within the reservoir or flow unit of the target reserve unit as parameters reflecting interlayer quality. These parameters are displayed as circular scatter points on a four-dimensional spider web quantitative identification chart to classify and evaluate interlayers in bottom-water heavy oil reservoirs. Connecting threshold points on different coordinate axes divides the reservoir into bottom-water conical regions, optimal synergy regions, and poor reserve utilization regions. Interlayers with all evaluation parameters in the optimal synergy region are classified as Class I; those with two or more parameters in the optimal synergy region are classified as Class II; and those with fewer than two evaluation parameters in the optimal synergy region are classified as Class III.

The invention relates to a visual detection positioning method for a continuous casting bale collector nozzle, and belongs to the technical field of metallurgy intellectualization, and the method comprises the following steps: S1, driving a visual detection module to photograph and scan the continuous casting bale collector nozzle through a moving module, and collecting a depth image and corresponding point cloud data; s2, performing visual processing on the acquired depth image; s3, when an effective circle is not detected, performing circle reinspection by adopting an RANSAC algorithm; s4, determining an ROI (Region of Interest) of the point cloud according to an image detection result, and processing the ROI point cloud; and S5, the coordinates of the circle center are converted from the camera coordinate system to the robot base coordinate system through the hand-eye calibration matrix, the attitude angle of the target in the robot base coordinate system is calculated and communicated to the long nozzle four-axis robot, and automatic long nozzle installation operation is completed. The invention further provides a visual detection positioning system for the continuous casting bale collector nozzle.

The utility model discloses an adjustable grinding medium feeding device for steel ball machining. The adjustable grinding medium feeding device comprises a frame body. The threaded rod is rotated to drive the second plate body, and then the roller body is driven to move. The positions of the grooves in the surface of the roller body are changed along with the change of the position of the roller body. The multiple sets of grooves in the surface of the roller body are designed in a gradient mode and tend to become large gradually from the starting end to the tail end. The amount of the grinding medium entering the grooves is different due to the size difference of the grooves. When the roller body moves to a specific position, only a small amount of grinding medium is allowed to enter the groove with a smaller size, and the roller is suitable for a fine machining stage with a higher grinding precision requirement; and when the roller body moves to the position where the size of the groove is large, more grinding media can be contained, and the requirement of the rough machining stage where materials need to be rapidly removed can be met. In this way, the position of the roller body is adjusted by rotating the threaded rod, and the feeding amount of the grinding medium can be controlled to a certain degree.

This utility model discloses a spray gun for a sludge direct injection and co-firing system, including a sludge conveying pipe. An atomizing nozzle is provided at the end hole of the sludge conveying pipe, and a sludge inlet connector is provided at the middle left side of the upper end of the sludge conveying pipe. This utility model uses two compressed air streams to simultaneously blow and push the sludge at multiple points and angles. By optimizing the size, number, distribution, and tilt angle of the airflow nozzles, it solves the problems of poor atomization effect of sludge material dispersion and even obstruction of sludge flow. In addition, by optimizing the cross-sectional size of the flow channel between the outer conical surface of the nozzle seat and the inner hole surface of the nozzle sleeve along the entire flow path of the air-sludge mixture, it achieves good uniformity of air-sludge mixing and good spray characteristics of the air-sludge mixture. Its structure is simple, the atomization effect is good, the reliability of use is high, and it can ensure complete combustion of sludge. It has wide applicability in this technical field.

The utility model provides an electro-hydraulic actuator device with a leakproof structure, which comprises an inner shell, a piston rod, a piston, a first hydraulic oil through hole, a second hydraulic oil through hole, a fixed seat and a protective plate, the fixed seat and the protective plate are both arranged in a connecting cylinder, the piston is fixedly arranged at one end of the piston rod, and the second hydraulic oil through hole is arranged at the other end of the piston rod. A protective outer shell is arranged on the outer side of the inner shell, a hollow cavity is formed between the protective outer shell and the inner shell, a plurality of reinforcing support connecting bulges are arranged in the hollow cavity, and the reinforcing support connecting bulges are uniformly distributed in the hollow cavity; a buffer block is fixedly installed at the upper end of the piston, and a threaded connecting part is fixedly arranged at the upper end of the connecting end plate and is in threaded connection with the lower end of the outer wall of the protective outer shell. According to the utility model, the vibration resistance can be enhanced by reinforcing the supporting bulges, a multi-sealing structure, the dynamic dust prevention of the protection plate and the design of the buffer block are combined, a leakage-proof system is constructed, and the reliability of equipment is improved.

The utility model relates to the technical field of machining, in particular to a metal machining jig with an air cooling chip removal function, which comprises a base, a jig body and an air cooling module. The jig body is arranged on the base, the air cooling module is arranged on one side of the jig body, and the air cooling module blows air and removes chips towards the jig body; through the air cooling module, the dual effects of blowing and chip removal and cold cutting are achieved on the jig body in the machining process, and the machining efficiency is improved; through the air blowing groove communicated with the air inlet connector, chippings on the jig body can be discharged towards the chip discharging groove, the chip discharging layout is optimized, and the integration degree is high; the jig body is provided with the first adsorption area and the second adsorption area so that workpieces of different models and sizes can be adsorbed, and the practicability is wide; and the air cooling module is provided with a vacuum connector and an air inlet connector so that negative pressure can be conducted on the first adsorption area and the second adsorption area, the adsorption force is enhanced, the workpiece adsorption stability of the jig body is improved, and practicability is high.

This application provides a CFD calculation method for heat dissipation in running shoes, including: Step S1, constructing a three-dimensional model of the running shoe system, the three-dimensional model of the running shoe system including a three-dimensional model of the running shoe and a three-dimensional model of the shoe last placed within the three-dimensional model of the running shoe; Step S2, performing preprocessing on the three-dimensional model of the running shoe system to obtain preprocessing results, wherein the preprocessing results include a structured three-dimensional mesh obtained by coupling the three-dimensional model of the running shoe system within a fluid domain model and then importing it into mesh generation software; Step S3, performing CFD calculations based on the preprocessing results to obtain calculation results. Implementing the technical solution of this application can yield more accurate data.

The utility model relates to linear transmission technical field, and disclose a kind of linear transmission structure convenient to replace, comprising: hollow section bar, linear transmission assembly and at least one plastic slider, section bar is equipped with mounting groove along transmission direction, linear transmission assembly includes at least two synchronous wheels, synchronous belt is connected on synchronous wheel, and synchronous belt is located inside section bar, plastic slider is equipped with the connecting portion matched with synchronous belt, connecting portion passes through mounting groove and connects synchronous belt, plastic slider is set on section bar outside, synchronous wheel rotates, drives synchronous belt to rotate, to further drive plastic slider to move along section bar length direction, this linear transmission structure convenient to replace is simple in structure, easy to disassemble, need not to be connected on movement seat with plastic slider, and linear transmission of plastic slider is realized by ingenious structure design, and disassembly is very convenient, and replacement efficiency is high.

The invention discloses a U-Net-based geoelectric high-resistance organic pollution identification method, system and equipment. The method aims at solving the problems that in the prior art, identification of a high-resistance organic pollution area with weak signals and fuzzy boundaries in geoelectric data is low in efficiency and poor in precision and depends on manual interpretation. According to the technical scheme, the method mainly comprises the steps that two-dimensional geoelectric profile data of a target area are collected and preprocessed; constructing an improved U-Net segmentation network fused with an attention gate module so as to enhance the focusing capability of the model on weak pollution characteristics; training the network by adopting a progressive strategy; and finally, inputting to-be-identified data into the trained model, and automatically outputting a high-precision high-resistance organic pollution region segmentation map. The method realizes full-process automation of pollution identification, has the advantages of high identification precision, fast processing speed and strong anti-interference capability, and can be widely applied to pollution site investigation, environment monitoring and restoration engineering.