147results about How to "Efficient replacement" patented technology

The invention belongs to the technical field of compensators, and particularly relates to a corrugated pipe compensator capable of preventing a gas pipeline from deforming and a using method, the corrugated pipe compensator comprises two connecting rings, a first corrugated pipe and a second corrugated pipe, the flange plate is located on the side, deviating from each other, of the two connecting rings, and a second corrugated pipe is connected between the flange plate and the adjacent connecting ring; a limiting mechanism; the two connecting rings are distributed in a mirror image mode with the first corrugated pipe as the center. The limiting mechanism comprises four first limiting assemblies distributed on the connecting ring in the circumferential direction and two second limiting assemblies symmetrically distributed on the radial outer side of the first corrugated pipe. The device has the beneficial effects that through arrangement of the limiting mechanism, the first corrugated pipe and the second corrugated pipe can be simply and conveniently disassembled, assembled and fixed; according to the utility model, the connection is firm and reliable, the complexity and required manpower during assembly are reduced, the working efficiency is greatly improved, and the maintenance and replacement by a user can be more efficient.

The invention relates to the technical field of filtration, in particular to rapid analysis gas filtration equipment for infrared heat conduction combined determination of fuel elements, the rapid analysis gas filtration equipment comprises a circulation part, a filtration module, an adjustment part and a detection part, the circulation part comprises a shell, through pipes are arranged on the left side and the right side of the shell, mounting openings are formed in the two sides of the interior of the shell, and the filtration module is arranged in the shell; a mounting opening is formed in the upper side of the shell, sealing grooves are formed in the left side and the right side of the mounting opening, a detection opening is formed in the upper side of a channel of the shell, a sealing sleeve is fixedly connected into a circular hole in the upper side of the shell, an extension shell is fixedly connected to a lower side opening of the shell, and the filtering module is mounted at the position of the shell and comprises a linkage plate located on the upper side of the shell. According to the gas filtering equipment disclosed by the invention, through the arrangement of structures such as the circulating part, the filtering module and the adjusting part, the gas filtering equipment can be used for quickly and efficiently replacing filtering fillers in a short time.

The invention belongs to the field of powder material processing, and particularly relates to a drying and cooling all-in-one machine and a drying and cooling method.The drying and cooling all-in-one machine is characterized in that a fluidized drying section, a fluidized cooling section and a gravity cooling section are arranged in a shell body from top to bottom, so that materials of the fluidized drying section and the fluidized cooling section are in a fluidized state; by means of the arrangement, materials fed from the feeding port are rapidly spread in the horizontal direction, even particle distribution is formed in the cross section of the shell body, the materials downwards, evenly and integrally pass through the gravity cooling section, and uneven cooling caused by material segregation and different cooling speeds of all the materials is eliminated; the high heat and mass transfer rate brought by material fluidization is utilized, and the materials are efficiently dried in the drying section; and damp and hot gas can be effectively replaced in the fluidization cooling section, so that material scabbing is avoided. After the material subjected to fluidized drying, cooling and dry gas replacement enters the gravity cooling section, a refrigerant with lower temperature can be adopted for cooling, and meanwhile, the cooling efficiency and the cooling effect are improved.

The invention relates to an electric vehicle battery replacement system which comprises a battery rack of a multi-layer structure, a water and electricity connector edge distance mechanism, a locking and unlocking mechanism and a double-bin sliding table, wherein the water and electricity connector edge distance mechanism and the locking and unlocking mechanism are arranged on all layers of the battery rack. The battery rack supports storage of multiple layers of batteries, and the hydroelectric connector edge distance mechanism achieves position adjustment of a hydroelectric connector through cooperation of a vertical guide rail, a horizontal guide rail and a displacement groove. The locking and unlocking mechanism is arranged on the battery supporting plate, and automatic locking and unlocking of the battery are achieved through X-direction and Y-direction lock heads and an electric cylinder; the double-bin sliding table is provided with a synchronous belt and a servo motor, and bidirectional replacement and accurate movement of a feed battery and a fully-charged battery are achieved through bidirectional synchronous movement of the first battery supporting plate and the second battery supporting plate. The technical problems that an existing system is poor in compatibility with batteries of multiple specifications, low in battery replacement efficiency and complex in operation are solved.

The utility model relates to the technical field of circuit board detection, in particular to circuit board detection equipment convenient for discharging, which comprises a placement table and a replacement device, a mold is arranged on the upper surface of the placement table, a protective cover is fixedly connected to the upper surface of the placement table, a detection pressing plate is arranged in the protective cover, and a discharge opening is formed in the detection pressing plate. The surface of the placing table is fixedly connected with a controller, the replacing device comprises a connecting plate and a limiting block, the limiting block is fixedly connected with the upper surface of the placing table, the connecting plate is fixedly connected with the surface of a mold, the mold is connected with the surface of the limiting block in a clamped mode, and the inner wall of the connecting plate is rotationally connected with a rotating rod. According to the utility model, through the arrangement of the replacement device, the die is effectively replaced, the effect of replacing the die is achieved, the situation that the equipment cannot detect materials of different models when the equipment is used is reduced, the equipment is difficult to detect the materials of different models, and the practicability of the equipment is improved.

The present application provides a shield machine tool changing method, device and related products based on a humanoid robot, the method comprising: determining a first tool position and first attribute information of a first tool that needs to be changed on the shield machine cutter disc; determining the current position information of the humanoid robot; when the distance between the current position information and the shield machine cutter disc is within a preset distance range, obtaining a first image of the first tool position in the shield machine and the ground below the first tool position through a visual module; determining a first position using the first image, and controlling the humanoid robot to move to the first position; obtaining second attribute information of the humanoid robot; determining target posture parameters of the humanoid robot based on the first attribute information and the second attribute information; controlling the torso part and the robotic arm to complete corresponding posture movements according to the target posture parameters by the humanoid robot, and controlling the robotic arm to replace the first tool according to the tool changing operation steps.

The utility model discloses a cutting device for car cover cloth production, which comprises a cutting base, first guide rail brackets, second guide rail brackets and an adjusting cutting head, the first guide rail brackets are fixedly mounted on two sides of the cutting base, the second guide rail brackets are slidably connected to the inner walls of the first guide rail brackets, and the adjusting cutting head is fixedly mounted on the cutting base. The adjusting cutting head is fixedly installed on the top of the inner wall of the second guide rail frame, and positioning frames are fixedly installed on the two sides of the top of the cutting base. By arranging the positioning frame, the electric telescopic rod, the mounting plate and the rubber plate, the electric telescopic rod can effectively drive the rubber plate on the inner wall of the mounting plate to move downwards, so that the rubber plate can accurately position the two sides of the top of a car cover, and the problem that when the device is not provided with a car cover positioning structure, when the car cover is cut through the cutting device, the cutting efficiency is high is solved. The problems that when the automobile cover is cut, the automobile cover is deviated and inclined, so that the cutting accuracy of the automobile cover is reduced, and the cut automobile cover cannot be matched with the size of an automobile body are solved.

This utility model relates to the field of high-efficiency dispensing equipment technology, and in particular to a glue cartridge replacement mechanism and replacement kit. The key technical points include: a base; a dispensing valve fixedly connected to the base, the dispensing valve having a plug-in module with a glue outlet channel, the plug-in module being used to plug into the bottom end of the glue cartridge, and when the glue cartridge is plugged into the plug-in module, the glue outlet channel connecting with the glue outlet at the bottom end of the glue cartridge; and a glue pressure assembly, which is vertically and vertically mounted on the base and located above the dispensing valve, the glue pressure assembly having an air inlet channel, and the glue pressure assembly being movably connected to the top end of the glue cartridge to connect or disconnect the air inlet of the glue cartridge. This application can significantly improve the glue cartridge replacement efficiency.

The utility model relates to the technical field of pressure injection molding devices, in particular to stannic oxide target material rapid pressure injection molding equipment which comprises a placing table and a material taking device, a sliding pressing plate is arranged above the placing table, a power top plate is arranged above the sliding pressing plate, a lower mold is arranged on the upper surface of the placing table, and the material taking device is arranged on the lower surface of the placing table. The upper die is arranged on the lower surface of the sliding pressing plate, the material taking device is arranged in the lower die and comprises a connecting groove and a die tank, the connecting groove is formed in the lower die, the die tank is slidably connected with the interior of the connecting groove, and a pull rod is fixedly connected to the surface of the die tank. According to the utility model, the material taking device is arranged, so that the die tank is effectively replaced, the effect of replacing the die tank is achieved, the occurrence of the situation that the material pressing speed of equipment is reduced due to the fact that pressed materials are difficult to take out when the equipment is used is reduced, and the rapid material taking effect is improved.

The utility model relates to the technical field of graphite heat exchangers, in particular to a corrosion-resistant shell-and-tube graphite heat exchanger which comprises a pipeline and a moving device, a first connector is arranged at one end of the pipeline, a second connector is arranged at one end of the pipeline, a limiting ring is arranged in the pipeline, a graphite tube is arranged on the inner wall of the limiting ring, and the moving device is arranged on the inner wall of the limiting ring. And the moving device is arranged in the limiting ring, the moving device comprises a moving block and a sliding groove, the sliding groove is formed in the inner wall of the pipeline, and the moving block is fixedly connected with the side face of the limiting ring. By arranging the moving device, the limiting ring is effectively replaced, the effect of rapidly replacing the limiting ring is achieved, and the problems that when equipment is used and the limiting ring is replaced, a user needs to use a tool to move and replace the limiting ring, the use of the tool is too tedious, and the use cost is reduced are solved. The use and working efficiency is reduced, and the working efficiency of a user is improved.

This application discloses a method for preparing ultra-high purity citric acid monohydrate based on supercritical CO2, belonging to the field of citric acid preparation technology. The method includes the following steps: dissolving citric acid monohydrate in an organic solvent to prepare a citric acid solution; spraying the citric acid solution into a supercritical CO2 environment to crystallize the citric acid using the supercritical anti-solvent effect; performing dynamic washing with pure supercritical CO2; and obtaining ultra-high purity citric acid monohydrate crystals after depressurization and drying. The citric acid monohydrate product prepared by this method has high purity, high light transmittance, low total metal ion content, controllable crystal habit, and low organic solvent residue, meeting the stringent requirements of high-end applications such as electronic and pharmaceutical grades.

This utility model discloses a diesel engine return oil pressure regulating control device, belonging to the field of diesel engine fuel system control technology. It includes a dry pump, a pressure regulating valve, a pipeline assembly, and a control circuit assembly. The pipeline assembly uses engineering pipelines. The pressure regulating valve is used to regulate the pressure at the dry pump inlet to ensure that the engine return oil pressure meets project requirements and that the return oil pipeline system is balanced. The control circuit assembly includes two power supply systems, a relay, and a benchtop control module. The power supply system consists of a regulated power supply and a power line. One end of one power supply system is connected to the negative terminal of the dry pump, and the other end of the normally open contact of the relay is connected to the positive terminal of the dry pump. One end of the other power supply system is connected to one end of the relay coil, and the other end of the relay coil and the other end of the power supply system are respectively connected to the switching terminals of the benchtop control module. This utility model has the technical advantages of precise pressure regulation, strong adaptability to operating conditions, convenient installation and maintenance, and high system reliability.

The present invention discloses a thyristor replacement device, comprising: the outlet end of a hydraulic pump is connected to the inlet end of a pressure relief valve, the outlet end of the pressure relief valve is connected to the inlet end of a diverter valve through a pipeline, a pressure gauge is arranged on the pipeline, the first outlet end of the diverter valve is connected to the inlet end of a first oil pipe, the second outlet end of the diverter valve is connected to the inlet end of a second oil pipe, a first control valve is arranged at the first outlet end of the diverter valve, a second control valve is arranged at the second outlet end of the diverter valve, the outlet end of the first oil pipe is connected to a first hydraulic cylinder, and the outlet end of the second oil pipe is connected to a second hydraulic cylinder; the first hydraulic cylinder comprises: a first cavity is U-shaped, a second cavity is strip-shaped, one end of two second cavities are respectively connected to the ends of two side arms of the U-shaped first cavity, and one surface of the two second cavities is respectively movably arranged with at least one first piston column. The present invention can quickly and efficiently replace a faulty thyristor, improve the power transmission reliability of a DC power transmission system, and reduce losses.

This utility model discloses a conical bidirectional mixing head for cement mixing pile construction, comprising a hollow outer rod, within which a hollow inner rod is nested. A vertical main shaft is fixedly connected to the end of the inner rod, which serves as the mixing shaft and is a hollow shaft with a closed conical end. The inner rod is coaxially fixedly connected to the top of the vertical main shaft, and their inner cavities are interconnected. Straight blades and a grouting pipe communicating with the inner cavity of the vertical main shaft are vertically mounted on the vertical main shaft. The straight blades are the main mixing blades. A positioning sleeve is fitted onto the vertical main shaft. The outer rod and the positioning sleeve are fixedly connected through the free end of a C-shaped mixing blade, which is a secondary mixing blade. This mixing head achieves bidirectional rotation while improving and optimizing its structural form, resulting in stronger mixing capacity and anti-drilling characteristics, which is beneficial to the stability and uniformity of pile formation and can improve construction efficiency to a certain extent.

The invention relates to the technical field of computational lithography, in particular to a job visualization management platform and a job execution method. A job scheduling module, a template management module and a job management module of the platform can be displayed on a display module; the template management module comprises a classification unit, and the classification unit is used for creating a job template; the operation management module comprises an operation generation unit and an operation monitoring unit, and the operation generation unit is used for receiving external operation data and importing the operation data into a corresponding operation template to generate one or more corresponding operations; the job scheduling module is used for receiving and executing jobs; the operation monitoring unit is used for monitoring the operation state of the operation on the operation scheduling module. Through visual display of the display module and classified management and operation monitoring of the operation, a user can efficiently manage the calculation photoetching operation and calculation resources, the overall efficiency of the calculation photoetching operation is improved, and a visual calculation photoetching operation visual management platform which is visual, easy to understand and excellent in experience feeling is provided for the user.

The utility model discloses a three -dimensional running water hatching equipment mainly relates to three -dimensional running water hatching technical field. Including support, water inlet pipe, water tank, circulating water pump, the bottom end inner wall of support is provided with the breeding frame, the upper end surface of support is provided with the seedling frame, the inside of support is provided with the mating frame, and mating frame is located the one side of breeding frame and seedling frame each other close, and water inlet pipe is located one side of support, and circulating water pump sets up at the bottom of water inlet pipe, and the output of water tank and circulating water pump fixed communication. The utility model has the beneficial effect that: solved the efficient partition management of the high -efficient partition management of the high -efficient partition management of the high -efficient partition management of the high -efficient partition management of the high -efficient partition management of the high -efficient partition management of the high -efficient partition management of the high -efficient partition management of the high -efficient partition management of the high -efficient partition management of the high -efficient partition management of the high -efficient partition management of the high -efficient partition management of the high -efficient partition management of the high -efficient partition management of the high -efficient partition management of the high -efficient partition management of the high -efficient partition management of the high -efficient partition management of the high -efficient partition management of

The utility model discloses an air disinfection machine which comprises a cabinet body, an air inlet and an air outlet are arranged on the cabinet body, an air draft device and a disinfection device are arranged in the cabinet body, the disinfection device comprises a plasma generator and a filter plate which are arranged in an installation box, and the filter plate is arranged above the plasma generator. The air draft device draws external air through the air inlet and conveys the external air into the disinfection device, and the external air is sterilized, filtered and purified through the disinfection device and then circulates indoors through the air outlet, so that circulating purification of indoor air is achieved, and the indoor breathing air quality is improved; according to the disinfection device, the plasma generator is matched with the filter plate, and the plasma generator is electrified to generate a high-voltage magnetic field, so that gas molecules in the air are ionized to form a large number of ions and electrons, and the ions and electrons act on microorganisms such as bacteria and viruses in the air and harmful gases and peculiar smell molecules in the air, so that disinfection and purification of the air are realized.

The utility model relates to the technical field of energy storage battery installation, and discloses a convenient installation structure of a household energy storage battery, the convenient installation structure comprises an installation base and a battery main body, the outer wall of the installation base is provided with an installation assembly used for rapidly fixing the battery main body, and the installation assembly comprises two moving plates moving relatively and a gear; the two movable plates are arranged on the mounting base, racks are welded to the outer walls of the bottoms of the two movable plates, the gear is rotationally connected to the outer wall of the middle of the mounting base through a rotating shaft, and the two racks are meshed with the gear. The fixing column is quickly inserted into the fixing hole of the battery main body, the installation process is completed, professional tools and skills are not needed, compared with a traditional structure, the installation difficulty and time cost are remarkably reduced, a user can independently complete installation, the problems of inconvenient installation and high cost are effectively solved, and the installation of the household energy storage battery is simpler and more feasible.

The utility model discloses a kind of self-adapting assembly component clamp device, comprising: mounting bracket;Fixed chuck, fixed on the mounting bracket;Movable chuck, for cooperating with the fixed chuck and clamping workpiece;Outer tube, set on the mounting bracket;Slide bar, slidingly set in the outer tube, the slide bar moves under the direction of first gas pressure towards the fixed chuck;The driving block and the movable chuck between there is mutually matched slope;Cylinder, for driving the driving block moves after the slide bar is locked and cooperates, to drive the movable chuck moves towards the direction of the fixed chuck by the cooperation of the slope.The technical scheme not only improves the compatibility of fixture to diversified products, and through accurate secondary clamping, the clamping accuracy and reliability in assembly process are guaranteed, so as to improve production efficiency and product quality, effectively solve the problem proposed in background art.

The utility model discloses a fracturing flow-back fluid multistage cyclone desanding device which comprises a processing support, a plurality of filter tanks are arranged on the processing support, the filter tanks are installed on the processing support in a step shape, filter rollers are arranged on the inner sides of the filter tanks, a pair of inclined blocks are arranged on the filter tanks, and the inclined blocks are arranged on the inner sides of the filter tanks. The utility model relates to the technical field of flowback fluid treatment, adopts the multi-stage filtering design, adopts the plurality of filtering basins which are installed in a step shape, and is matched with the filtering drum, the filtering nets and the filtering plates on the U-shaped inclined blocks, so that the flowback fluid can be effectively filtered, and the flowback fluid can be efficiently and efficiently treated by the filtering drum, the filtering nets and the filtering plates on the U-shaped inclined blocks and the like. According to the flow-back liquid filter, graded fine filtration can be carried out according to the characteristics of impurities with different particle sizes in flow-back liquid, the filtration precision is greatly improved, various solid substances, fine particles and suspended solids are effectively removed, and it is ensured that the treated liquid meets the high-standard recycling or discharging requirement.

The utility model discloses a paint mist filtering device. The paint mist filtering device comprises a filtering unit closed room and a paint mist capturing trolley which can be flexibly pushed into the filtering unit closed room, the filtering unit closed room comprises a cabinet body and two cabinet doors arranged on one side of the cabinet body; a plurality of fluency strips are hinged to the two side walls of the interior of the cabinet body. A plurality of partition plates are arranged in the paint mist capturing trolley, storage areas are arranged among the partition plates, and filter cotton is placed in the storage areas; a plurality of connecting blocks are arranged on the outer side of the top of the paint mist capturing trolley, a rubber coating wheel is connected to any connecting block in a matched mode, and the rubber coating wheel is matched with the fluent strip; the paint mist capturing trolley is flexibly pushed into the filtering unit closed room by arranging fluent strips in the filtering unit closed room and matching with rubber coating wheels on the paint mist capturing trolley, the filtering cotton is placed in the storage area to filter paint mist, and when the filtering cotton needs to be replaced, the paint mist capturing trolley is pushed out to achieve efficient replacement of the filtering cotton.

The invention provides a kana replacement method based on vehicle similarity for the Internet of Vehicles, and relates to the technical field of wireless network security, a kana replacement system is used for obtaining a vehicle kana, and the kana replacement system comprises three layers of structures: a cloud layer, a fog layer and an edge layer. The pseudonym replacement method can be divided into a vehicle pseudonym acquisition stage, a pseudonym replacement area determination stage and a vehicle cooperation pseudonym replacement stage. According to the method, potential attacking and tracking capabilities of malicious attackers are fully considered, and a dynamic region division strategy based on vehicle similarity is supported. The method supports a kana replacement scheme independent of the road infrastructure (RSU), can improve the efficiency of kana replacement, reduces the dependence on the road infrastructure (RSU), improves the anonymity and safety of the system, and has a good application value.

The invention discloses a hand rehabilitation training system and training method, and relates to the technical field of hand rehabilitation training. The finger rehabilitation device comprises a wrist fixing block, a palm fixing block and a finger fixing leather sheath, a first rotating shaft is fixedly installed outside the wrist fixing block, the finger fixing leather sheath is fixedly installed outside the hand fixing plate, and a finger rehabilitation assembly is fixedly installed outside the palm fixing block. The wrist can swing to drive the fingers to bend, the wrist swings to drive the fingers to bend, the joint motion range of the fingers is helped to be recovered, the flexibility of the fingers is improved, and through the embedded design of a first embedded protrusion and a first embedded groove matched with the embedded design of a second embedded protrusion and a second embedded groove, the flexibility of the fingers is improved. According to the detachable hand rehabilitation device, the hand rehabilitation device can be conveniently detached, so that external cleaning and subsequent maintenance of the hand rehabilitation device are facilitated, and all the components can be conveniently cleaned through the detachable design.

The invention relates to a cable laying vertical shaft which comprises a working well body and a ventilation system which are located under the ground. The ventilation system comprises a natural air inlet shaft, a mechanical exhaust shaft, an air duct and an automatic gas quality monitoring device. The natural air inlet shaft is arranged on the working well body and locally located above the ground, a natural air inlet is formed in the well wall, above the ground, of the natural air inlet shaft, and the natural air inlet shaft communicates with the working well body; the mechanical exhaust shaft is arranged on the working well body and locally located above the ground, a mechanical exhaust outlet is formed in the well wall, above the ground, of the mechanical exhaust shaft, the air duct is arranged in the working well body and the mechanical exhaust shaft and communicates the bottom of the working well body with the mechanical exhaust shaft, and the automatic gas quality monitoring device is arranged at the bottom of the working well body. The ventilation device is suitable for a pipe jacking method laying project, the ventilation requirements of cable laying, personnel maintenance and the like are met, and effective replacement of gas at the bottom of the vertical shaft can be achieved.

The present invention discloses a screw cycle test device for a screw rod, belonging to the technical field of test devices. The screw cycle test device for a screw rod comprises a mounting base plate, a driving motor is fixedly connected to one side of the upper surface of the mounting base plate, a driving shaft is fixedly connected to one side of the driving motor, a driving mechanism is arranged on one side of the driving motor, the driving mechanism comprises a fixed sleeve rotatably connected to the driving shaft, and a torque adjustment mechanism is arranged at one end of the fixed sleeve away from the driving motor. The present invention adjusts the maximum torque that the screw rod can withstand when rotating by adopting the cooperation between the driving mechanism and the torque adjustment mechanism, and avoids damage to the screw rod or workpiece caused by excessive application of torque, and by adopting the synergistic effect between the test connection mechanism and the push sleeve, the efficient replacement of the screw rod can be achieved, thereby reducing the downtime of the device and improving the test efficiency.

The invention relates to the technical field of dispensing equipment, and provides an automatic valve and glue changing device applied to dispensing equipment, comprising: a back plate main body, one side of which is provided with a back fixing plate, the other side of which is provided with a driving hinge, and which is internally provided with an air chamber and a movable push rod communicated by an air passage; a clamping hook clamped with the driving hinge is arranged on one side of the valve main body, an electromagnet is arranged on a mounting seat on the other side of the valve main body, and the bottom of the valve main body is connected with a runner; the cylinder fixing support is provided with a containing part, an adapter and a metal plate capable of being attracted by the electromagnet. The movable push rod can be driven by air pressure to push the drive hinge to stretch out and be clamped with the clamping hook, and therefore the valve body can be rapidly locked. The electromagnet can adsorb the metal plate to realize rapid combination of the rubber sleeve; the device has the characteristics of modular structure, reliable locking, quick replacement, good sealing performance and high integration level.

The present application relates to a kind of high-precision cold-rolled screw with medium carbon steel hot rolled wire rod in metallurgical technology field, preparation method and application.The present application is aimed at solving the technical problems of low first processing qualified rate of cold-rolled screw caused by poor material organization uniformity and low purity.The chemical composition of the wire rod according to the present application is as follows: C 0.52-0.58%, Si 0.15-0.35%, Mn 0.70-0.90%, Cr 0.10-0.35%, Al 0.015-0.045%, Ti≤0.0025%, [O]≤0.0015%, [N]≤0.0060% and the like, with the balance being Fe.The preparation method of the present application obtains uniform organization with cross-section hardness range ≤20HV through the combined action of narrow component design, continuous casting end electromagnetic stirring, high temperature diffusion annealing and "fast first and slow later" controlled cooling process.The present application is mainly used for manufacturing high-precision ball screw, and the finished product precision reaches more than 5 levels, with first cold-rolled forming qualified rate ≥85%.

The utility model relates to the field of refrigeration equipment, in particular to an online replacement and maintenance device for a distribution unit of a liquid cooling system, which is used for solving the problem that operation of a corresponding server needs to be stopped when a cabinet distribution unit needs to be disassembled for maintenance. The device comprises a temporary replacement distribution unit, the temporary replacement distribution unit is provided with a first connector and a plurality of second connectors, one end of the temporary replacement distribution unit is provided with a temporary liquid supply port, and the other end of the temporary replacement distribution unit is provided with a liquid overflow port; the device further comprises an exhaust and liquid storage unit and a liquid conveying unit, the exhaust and liquid storage unit is connected with the liquid conveying unit, and the liquid overflow opening, the exhaust and liquid storage unit, the liquid conveying unit and the temporary liquid supply opening are sequentially connected through pipelines. And the control valve is arranged on a pipeline between the liquid conveying unit and the temporary liquid supply port. According to the online replacement and maintenance device for the distribution unit of the liquid cooling system, the distribution unit of the cabinet is replaced without stopping the server.

The present application relates to the technical field of biotechnology, and particularly relates to a CRISPR / SuCas12a2-based gene editing system and application thereof. The present application constructs a high-efficiency counter-selection recombination editing tool by exploring the counter-selection potential of CRISPR-SuCas12a2 and combining it with lambda recombinase. The method can complete high-efficiency recombination editing of genes through a double-plasmid and single-plasmid system carrying SuCas12a2 and lambda recombinase, and the efficiency is greatly improved compared with the current recombination editing method based on lambda recombinase. Compared with the previous dependence on the specific cleavage of target double-stranded DNA by CRISPR-Cas protein to promote the effect of recombination editing, the efficiency is also obviously improved, and the method has the advantages of more transformants and low probability of immune escape. The plasmid construction, recombination editing and plasmid elimination operations can be completed within one week. The above functions supplement a powerful tool for gene recombination editing.