179results about How to "Reduce the potential for damage" patented technology

The invention provides swimming pool cleaning equipment, and relates to the technical field of swimming pool cleaning. The swimming pool cleaning equipment comprises a base body which comprises a bottom face and a containing cavity, and a liquid inlet communicated with the containing cavity is formed in the bottom face. And the rolling brush is rotationally connected with the base body, and the rolling brush and the liquid inlet are arranged in a spaced mode in the advancing direction of the swimming pool cleaning equipment. And the turbidity detection device is arranged on the bottom surface of the base body, is positioned between the liquid inlet and the rolling brush, and is used for detecting the turbidity of the liquid. In the advancing direction of the swimming pool cleaning equipment, the distance between the turbidity detection device and the central axis of the liquid inlet is a first distance, the minimum distance between the turbidity detection device and the rotating central axis of the rolling brush is a second distance, and the first distance is larger than the second distance. According to the swimming pool cleaning equipment provided by the embodiment of the invention, the turbidity of the liquid can be accurately measured, so that the swimming pool cleaning equipment can more intelligently plan a cleaning path, key areas are ensured to be fully cleaned, unnecessary repeated cleaning is reduced, and then the cleaning efficiency is improved.

The invention relates to the technical field of smart home, and provides an obstacle avoidance processing method of cleaning equipment, the cleaning equipment, a cleaning system, a computer readable storage medium and electronic device.The obstacle avoidance processing method of the cleaning equipment comprises the steps that the surrounding environment of the cleaning equipment is detected through an obstacle sensor; generating a low obstacle map corresponding to the surrounding environment; the low obstacle map is at least used for indicating the boundary contour of a low obstacle in the surrounding environment; determining an obstacle avoidance path for the low obstacle according to the boundary contour of the low obstacle in the surrounding environment; and when the cleaning equipment is close to the low obstacle, the cleaning equipment moves along the obstacle avoidance path. According to the obstacle avoidance processing method of the cleaning equipment, smooth obstacle avoidance for low obstacles can be realized.

The utility model relates to an automatic sorting device for lens disassembly, which relates to the technical field of lens disassembly and comprises a storage bin used for storing lenses to be disassembled and a feeding and discharging Y shaft arranged on one side of the storage bin and used for moving the lenses in a tray out to a working area. The jacking and clamping double-station assembly comprises a clamping head for clamping a to-be-disassembled lens, a lead screw motor for ejecting out to-be-sorted components in the lens in the direction below the clamping head, a component pre-pressing plate piece for pre-pressing the products to prevent the products from scattering and inclining, and a pre-pressing mechanism switching shaft for adjusting the position of a pre-pressing mechanism. An inverted U-shaped support plate is arranged on the top surface of the free end of the component pre-pressing plate piece, the inner wall of the U-shaped support plate is connected with a vacuum chuck tailstock through a lifting component, the bottom surface of the vacuum chuck tailstock is connected with a vacuum chuck piece through a pipeline longitudinally penetrating through the component pre-pressing plate piece, and the vacuum chuck piece adsorbs a component in a lens in a product.

The invention discloses a prevention and control method for early intervention of thermal runaway of a lithium battery, and aims to solve the problems that in the prior art, an alarm can be given only when smoke and temperature are obviously increased, the reaction time is long, and early intervention cannot be realized. The prevention and control method is divided into a first-level keep-alive operation mechanism and a third-level early warning operation mechanism, and comprises the following steps: in a 0-level state, a PACK-level sensor and a master control maintain online heartbeat; the first-level state is that the PACK-level sensor detects data exception in the early stage; in the second-stage state, the PACK-stage sensor preliminarily considers that the battery is possibly in the early stage of thermal runaway, and the PACK detector sends a second-stage fire alarm state to the controller; and in the third-level state, the PACK level sensor determines that the battery PACK is in the thermal runaway state, and the PACK detector sends a third-level fire alarm state to the controller. According to the method, the temperature of the battery PACK is rapidly reduced through early intervention and low-quantity disposal strategies, the battery PACK is prevented from entering a thermal runaway state, and therefore fire disasters are avoided, economic losses are reduced, and the safety of the system is improved.

The present invention discloses a switch-on and switch-off drive mechanism for a high-voltage vacuum circuit breaker, which belongs to the technical field of circuit breakers, and comprises a box body and a vacuum chamber, wherein the vacuum chamber is mounted on the box body, and the vacuum chamber is arranged in multiple groups; a wiring port, wherein the wiring port is fixedly mounted on the side surface of the vacuum chamber, and each group of vacuum chambers is equipped with two groups of wiring ports, and the two groups of wiring ports are arranged up and down; a conductive plate, wherein the conductive plate is mounted inside the wiring port, and one end of the conductive plate extends into the vacuum chamber; and a first conductive column, wherein the upper end of the first conductive column is fixedly connected to a conductive plate of a group at the upper end. The present invention can realize that when closing or opening the switch, the initial speed is fast, and the speed becomes slower in the later stage. When performing the closing and opening operation, the initial speed is fast, and the rapid dynamic change can effectively reduce the generation of arcs, and the later speed becomes slower, which can avoid the problem that the excessive closing and opening speed causes excessive impact on the overall structure of the circuit breaker.

The invention relates to the technical field of steel pipe cleaning, and discloses a steel pipe inner and outer surface treatment process and treatment equipment thereof.The steel pipe inner and outer surface treatment process comprises a lifting machine and a base, the top of the base is fixedly connected with a cleaning pool, the outer wall of the lifting machine is fixedly connected with a lifting motor, and a steel cable is wound in the lifting motor; the double-layer cleaning assembly is used for enabling the inner surface and the outer surface of the steel pipe to be fully cleaned, the circulating contact assembly is used for keeping the cleaning effect consistent, and through the limiting and guiding effects of a guiding gasket, a blocking gasket, a conical guiding ring and a guiding block, clean water forms fluid of a spiral structure; the two spiral fluids are used for cleaning the two sides and the middle of the inner surface of the steel pipe correspondingly, it is guaranteed that the cleaning reaction is conducted uniformly in the steel pipe, the uniformity and quality of the cleaning effect are improved, and due to the fact that the spiral clear water can make effective contact with the surface of the steel pipe, consumption of the clear water is reduced.

The invention discloses an unmanned aerial vehicle landing preparation and autonomous recovery control system and method for a mobile airport, and belongs to the technical field of unmanned aerial vehicles. The mobile airport comprises an airport control system and a main landing platform, the airport control system is used for monitoring and managing the operation of the airport, and the main landing platform is used for providing a take-off and landing area for the unmanned aerial vehicle; the standby landing platform is larger than the main landing platform and is used for providing a take-off and landing area outside an airport for the unmanned aerial vehicle; and the control system is used for collecting data from the mobile airport, the unmanned aerial vehicle and the landing platform and sending control information. Through the design of high integration and automation, all parts of the system work cooperatively, on-site business trips of personnel are reduced, the operation safety and efficiency of the unmanned aerial vehicle are improved, it is ensured that the unmanned aerial vehicle can land safely under various conditions, and meanwhile potential damage to airport facilities and the unmanned aerial vehicle is reduced.

The invention relates to the technical field of intelligent control systems, in particular to an intelligent control system of a tumor electric field treatment device, which comprises a resistivity acquisition module for measuring tumor electrical impedance under differentiated frequencies by using a four-electrode measuring instrument, recording resistivity data changing along with time, enhancing the signal-to-noise ratio of signals by using a differential amplification technology, and acquiring the tumor electrical impedance by using the resistivity acquisition module; and calibrating the reading of the instrument, and generating a calibrated resistivity parameter set. According to the method, by analyzing the correlation between tumor electrical impedance and gene expression data, accurate adjustment of treatment electric field parameters is achieved, the treatment pertinence and the treatment effect are improved, the method allows personalized adjustment of a treatment scheme according to specific biomarkers of tumors, optimal matching of the electric field parameters and specific tumor characteristics of patients is ensured, and the treatment effect is improved. The application of clustering analysis realizes fine group division in patients with different tumor types or stages, so that the electric field treatment can be optimized according to specific tumor biological behaviors, and the phenomenon of one-time cutting possibly occurring in traditional treatment is avoided.

The quartz crucible raw material processing device comprises a supporting assembly, a driving mechanism, a crushing and grinding bin, a grinding assembly, a discharging assembly and a crushing mechanism, and the driving mechanism is arranged at the top of the supporting assembly; the crushing and grinding bin is mounted at the top end of the driving mechanism; the grinding assembly is arranged in the crushing and grinding bin and comprises a grinding roller, an upper baffle, a driven wheel and a lower baffle, the grinding roller is rotationally installed in the crushing and grinding bin, the upper baffle and the lower baffle are both installed in the crushing and grinding bin and located on the outer side of the grinding roller, and the driven wheel is connected with the grinding roller; and the driven wheel penetrates through the crushing and grinding bin and is in transmission connection with the driving mechanism. Therefore, in the quartz stone machining process, the splashing phenomenon of quartz stone fragments is effectively reduced, potential damage of the fragments to the crushing device is reduced, and potential safety hazards to field workers are effectively reduced.

The utility model provides a battery pack and an electric vehicle, and the battery pack comprises a cooling assembly which is provided with a first accommodating cavity and a second accommodating cavity which are arranged at an interval along a first direction, the first accommodating cavity is used for accommodating a heat dissipation medium to form a cooling part, and the second accommodating cavity is used for accommodating a non-Newtonian fluid to form a supporting part; the battery module is opposite to and connected with the cooling assembly in the first direction, the first containing cavity is located between the second containing cavity and the battery module, the supporting part is used for supporting the cooling part and the battery module, and the first direction is the thickness direction of the battery module. The cooling assembly of the battery pack integrates three functions of cooling, supporting and buffering, the space occupied by an independent cooling system, a buffering material and a physical supporting piece in a traditional scheme is remarkably reduced, the overall size of the battery pack in the first direction is effectively reduced, and the space utilization rate of an electric vehicle is increased.

The utility model relates to a telescopic cable laying device with a self-adaptive guiding function. The utility model is suitable for the technical field of cable laying. The technical problem to be solved by the utility model is to provide the telescopic cable laying device with the self-adaptive guiding function. According to the technical scheme, a barrel is axially through, a convex ring is arranged at the front end of the barrel, the outer diameter of the convex ring is gradually reduced from back to front, and a notch is annularly formed in the convex ring; a plurality of clamping arms are annularly hinged to the outer wall of the barrel through hinge structures, and the free ends of the clamping arms extend towards the rear portion of the barrel and are provided with pulleys. A tension spring is arranged between the middle of each clamping arm and the outer wall of the barrel, the tension springs and the clamping arms are located on the same plane, and the connecting ends of the tension springs and the barrel are arranged on the side, close to the protruding ring, of the hinge structure and used for pulling the clamping arms open. The cable penetrates through the cylinder body, when the cable is laid in a pipeline, one end, provided with the pulley, of the clamping arm is supported in the pipeline, and the cylinder body and the cable integrally slide.

The utility model relates to the technical field of fixing devices for testing, and discloses a fixing device for performance testing of electronic components, which comprises a test board, an operation board arranged at the top of the test board, a plurality of electronic component placing grooves arranged at the top of the operation board, and two insertion grooves arranged on the inner wall of each electronic component placing groove. Metal rods are arranged on the upper sides of the insertion grooves, and after the push rod ends of the electric push rods extend out, the second transverse plate drives the multiple connecting frames to move downwards, so that the metal rods are inserted into the inner sides of the insertion grooves, the metal rods make contact with pins of the electronic components, and therefore performance detection is conducted on the electronic components; when the metal rod is in contact with the pins of the electronic element, certain buffering is achieved, pin damage possibly caused by hard contact is avoided, an operator only needs to press the switch, automatic contact between the metal rod and the pins of the electronic element can be achieved, manual operation is not needed, and therefore work efficiency is greatly improved.

The invention relates to the technical field of biological materials, in particular to an intrauterine degradable shape memory isolating membrane and a preparation method thereof. The raw materials of the isolating membrane at least comprise a compound of an artificial high-molecular compound and a natural high-molecular compound. The mass ratio of the artificial high-molecular compound to the natural high-molecular compound is (5-95): (95-5); the isolating membrane is used for loading the medicine and continuously releasing the medicine into the uterine cavity. The isolating membrane is folded and conveyed to a womb wound part after an operation, the purpose of automatically unfolding the isolating membrane to reach the womb wound part is achieved, and intrauterine adhesion is physically blocked. In addition, the isolating membrane can load bioactive medicines according to requirements, so that the functions of relieving pain or stimulating and continuously activating an endometrial basal layer are realized, the occurrence of uterine scars is inhibited, and the normal uterine fertility function of a patient can be recovered more quickly.

The invention relates to a double-response EGFR (epidermal growth factor receptor) targeted paclitaxel liposome based on heat shock protein, which adopts a pH sensitive design and is doped with heat shock protein 90 (HSP90) responsive molecule gambogic acid (GA), the surface of the liposome is modified with an EGFR antibody, and the core of the liposome is packaged with paclitaxel (PTX). According to the double-response EGFR targeted paclitaxel liposome of the heat shock protein, triple negative breast cancer cells are accurately locked through a double targeting strategy, and cell surface specific recognition is achieved through an EGFR antibody; gambogic acid GA responds to HSP90 overexpression in cells to promote drug release; the pH sensitive characteristic ensures that the medicine is quickly released in an acidic tumor microenvironment, the treatment effect is enhanced, and normal cell damage is reduced. According to the invention, the specific quick response release of the medicine is realized, the treatment accuracy and safety are improved, and the preparation method has a remarkable application prospect in the aspect of preparing the medicine for treating the triple-negative breast cancer.

The utility model discloses an easy-to-tear printed matter packaging box, and relates to the technical field of packaging boxes. The printing product packaging box comprises a hard packaging box body and printing products stacked in the hard packaging box body, through grooves are formed in the surface of the hard packaging box body, reinforcing assemblies are bonded to the positions, located at the corner angles, of the inner wall of the hard packaging box body, and box cover wings are arranged on the hard packaging box body. The box cover wing is closed and fixed through the tearing assembly, a user can easily open the box cover wing only by tearing the tearing assembly, a blade does not need to be used for ripping an adhesive tape, potential damage to printed products in a hard packaging box is reduced, the damage risk is reduced, operation safety and convenience are improved, and the packaging box is convenient to use. The tearing assembly in the through groove is pulled to open the through groove, so that printed products stacked in the hard packaging box can be conveniently taken through the through groove, and the situation that the printed products are difficult to take due to the fact that the printed products are tightly attached to the inner wall of the hard packaging box is avoided.

The invention provides a safe splicing and lifting method for an asymmetric large-span steel corridor, which belongs to the technical field of building construction and comprises the following steps: firstly, mounting a primary truss preassembled unit, hoisting and welding from two ends to the middle by using a crane in batches, and welding with a main body structure; the lifting platform is installed through a high-altitude bulk method and welded to the connecting rods and the main truss preassembling units, and a stable system is formed. And the position of a jig frame is determined on the ground of the installation position of the lifting units, and the lifting units of the corridor are installed above the jig frame step by step. After a lower lifting point lifting appliance, an upper lifting appliance and a steel strand are installed, a lifting and unloading strategy of lifting point oil pressure balance, structure posture adjustment, displacement synchronous control and sequential unloading in place is adopted, and a lifting unit and an after-loading unit are gradually lifted and installed in place. And finally, the hydraulic lifting system and related temporary measures are dismantled, and the installation work of the whole corridor is completed. The technical problem that it is difficult to ensure the installation precision under the safety condition in an existing method is solved.

The invention discloses preparation and application of a space-time cascade wound dressing, relates to the technical field of biomedical materials, and solves the problems of limited depth and poor treatment effect when a diabetes infected wound is treated in the prior art. The space-time cascade wound dressing is composed of a hydrogel patch and a soluble microneedle array. The hydrogel patch comprises polyvinyl alcohol, sodium alginate, nano-enzyme, a color reagent for indicating pH and the like, has the functions of oxidation resistance and sterilization, and can monitor the state of the wound surface in real time according to the pH change indication of the wound surface; the soluble microneedle array comprises a soluble polymer and glucose oxidase, and has the functions of deep sterilization and local blood glucose reduction. According to the space-time cascade wound dressing provided by the invention, two treatment forms of the hydrogel patch and the soluble microneedle array are integrated, and a nano enzyme and a natural enzyme catalytic system capable of generating cascade catalytic reaction are respectively introduced into the hydrogel patch and the soluble microneedle array, so that a multifunctional treatment system with a space-time cascade catalytic effect is formed; and comprehensive treatment and real-time monitoring of multi-layer wound surfaces are realized.

The invention provides a refrigerant circulation system for an air suspension compressor and a control method and device of the refrigerant circulation system. The system comprises a main refrigerant loop provided with an air suspension compressor, a condenser, an evaporator and an electronic expansion valve which are sequentially connected, a first inlet is formed in an air bearing of the air suspension compressor, a first outlet is formed in a machine body of the air suspension compressor, and the first inlet and the first outlet are both communicated to a cavity in the machine body; an outlet of the condenser is communicated to the first inlet through the liquid supply pipeline, and the first outlet is communicated to the evaporator through the liquid discharge pipeline; a pump body is arranged on the liquid supply pipeline, an exhaust pipeline communicated to the evaporator is further arranged on the liquid supply pipeline, and an exhaust valve is arranged on the exhaust pipeline. Through accurate control and an exhaust mechanism, on one hand, it is ensured that a refrigerant circulates in the system in the optimal state, on the other hand, stable operation of the pump body is ensured, the working efficiency of the pump body is improved, and then the efficient refrigeration effect is achieved.

The utility model discloses a waterproof water guide groove for a building roof for building integrated photovoltaics (BIPV). The photovoltaic panel groove comprises a groove body, the groove body is arranged at a gap between every two adjacent photovoltaic panels, and the middle part of the groove body extends upwards to form a convex part; the groove body is divided into two water collecting grooves by the protruding part, and a plurality of drainage grooves are distributed in the water collecting grooves. A filter screen is fixedly arranged at the bottom of the drainage groove; a water collecting chamber is fixedly arranged at the bottom of the tank body; the gradient on the two sides of the protruding part accelerates the drainage speed of water flow, and therefore the drainage efficiency is improved. Due to the fact that the protruding part is arranged, a relatively high area is formed in the middle of the groove body, water flow can flow towards the two sides more easily, and accumulated water is prevented from being formed in the middle. The potential damage of moisture to the building and the photovoltaic panel is reduced, and meanwhile, the drying and cleaning of the tank body are kept; and the direction and the speed of water flow are changed through the protruding parts, impurities and particles can be precipitated in the water collecting chamber more easily, and therefore cleaning work is more convenient and efficient.

The invention discloses a high-precision cutting control system of a non-metal part, and belongs to the technical field of non-metal part machining, and the high-precision cutting control system of the non-metal part is characterized by comprising a numerical control cutting structure, the surface of the numerical control cutting structure is in bolted connection with a collecting frame, the top of the collecting frame is in bolted connection with a protective shell, and the inner wall of the protective shell is in bolted connection with a temperature recognition structure; the top of the temperature recognition structure fixedly communicates with a temperature and humidity adjusting assembly, the right side of the temperature and humidity adjusting assembly fixedly communicates with the left side of the protective shell, and the problems that in the using process of an existing high-precision cutting control system for the non-metal part, due to the reasons such as equipment precision, tool abrasion and operation skills, the machining precision is not high enough, and the machining efficiency is high are solved. The problems that the cutting process is complex and long in consumed time due to the characteristics of non-metal materials, and the production efficiency is low due to the problems that equipment is started and stopped frequently and a cutter is replaced are solved in the prior art.

The invention provides a dental bur, an implant handpiece and a dental drilling device. The dental bur comprises a sleeve, and the axial first end of the sleeve is configured to be in driving connection with a driving part of the implant handpiece so as to be driven by the driving part to rotate; the first axial end of the cutting rod is located in the sleeve, the cutting rod is telescopically arranged relative to the sleeve in the axial direction, and the cutting rod is configured to have a synchronous rotation state with the sleeve; and the cutting part is connected to the second axial end of the cutting rod, and the cutting part is close to or far away from the second axial end of the sleeve along with the telescopic movement of the cutting rod relative to the sleeve.

The utility model relates to the technical field of rice breeding, in particular to a germination accelerating and seedling raising device for rice breeding, which comprises a mounting frame, a placing frame, a sliding block, a mounting frame, a seedling raising frame, a connecting plate, a buckling groove, a movable plate and a buckling column, multiple sets of placing frames are sequentially installed in the installation frame from top to bottom, sliding blocks slidably connected with the installation frame are installed at the rear ends of the two sides of the placing frames, and multiple sets of seedling raising frames used for placing rice seedlings are arranged in the placing frames in a buckled mode; according to the seedling raising device, the placement frame can easily slide in the mounting frame through the design of the sliding blocks, meanwhile, the pulling plates, the buckling columns and other assemblies are arranged, a user can conveniently and rapidly fold or disassemble the seedling raising frames, and the seedling raising device is convenient to use and high in practicability. Through the design of the buckling grooves, multiple groups of seedling raising frames can be conveniently connected together or detached for checking, and the growth condition of each group of rice seedlings can be conveniently managed and observed.

The invention discloses a vehicle door unlocking method and device, electronic equipment and a storage medium, and belongs to the field of vehicle control. The method comprises the steps that collision risk information between a vehicle and a target obstacle is actively detected, and under the condition that the collision risk information meets a target risk condition, an unlocking instruction is directly sent to a vehicle door of the vehicle. Different from a traditional mode, whether the safety air bag is exploded or not is not used as a unique signal source for unlocking the vehicle door, and the dilemma that the vehicle door cannot be unlocked due to the fact that the safety air bag is not exploded is avoided. By means of the innovative unlocking mechanism, no matter whether the safety air bag is triggered by collision or not, the automobile door can be unlocked in time as long as the collision risk exists. Therefore, precious time is won for escape of passengers in the automobile and rescue of rescue workers outside the automobile, safety of the passengers in the automobile in collision accidents is remarkably improved, and rescue risks and potential injuries caused by the fact that the automobile door cannot be unlocked in time are reduced.

The invention discloses a solution filling production system which comprises a rack, a pair of material rollers, a preheating module, a plastic uptake module, a pre-pressing module, a plug assembling and pressing module, an air tightness detection module, a filling module, a top pressing module, a cutting module, a recycling module, a discharging and placing module and a conveying module. The system has the following beneficial effects: 1, the production efficiency is improved: solution filling and container production are integrated in the same system, so that the waiting time and the transfer time in the production process can be greatly reduced; and the container enters a filling stage immediately after being produced, and extra transportation and storage links are not needed, so that the overall production speed is accelerated. 2, the cost is reduced: the manpower demand of the integrated system is reduced because an independent transfer team is not needed to move the container; and meanwhile, loss and potential damage of the materials in the transfer process are reduced, and the rejection rate and the reprocessing cost are reduced.

The present invention discloses a method for using a radiotherapy positioning pad, which includes a pad body, which includes a fixing seat, a connecting frame arranged inside the fixing seat, and a memory pad arranged inside the connecting frame; an identification device connected to the pad body, which includes a body, a display panel located on the surface of the body, and an identifier arranged below the display panel; and a plug wire for connecting the pad body and the identification device. The method for using the radiotherapy positioning pad collects the pressure exerted on the memory pad during each radiotherapy, which is then used for the next prediction calculation, and the memory pad can be automatically adjusted according to the prediction result, which can reduce the treatment deviation caused by improper body position, thereby reducing the potential damage to the surrounding healthy tissues, and secondly reduce the treatment interruption and repeated treatment caused by manual adjustment, which can make more effective use of medical resources.

The present invention discloses a control device for power transmission and distribution equipment, including a control device assembly, the control device assembly including a housing component and a controller, the housing component including an inner housing, an outer housing, a protective glass sheet and an elastic button, one end of the outer housing is slidably connected to the inner wall of the inner housing, and is clamped and fixed to the inner wall of the inner housing through a clamping mechanism; a boss is fixedly connected to the inner wall of the outer housing, and the controller is fixedly connected to the top of the boss; the protective glass sheet and the elastic button are respectively arranged on the surface of the outer housing, and the outer housing includes an outer wear-resistant plate, a middle moisture-proof plate, an inner heat insulation plate and a substrate. Thus, the controller is fixedly connected to the boss on the inner wall of the outer housing, and such a design enables the outer housing to form a spaced housing structure. When the outer housing is subjected to external impact, the spacing between the controller and the inner wall of the outer housing provides a larger deformation space for the outer housing, which can effectively reduce the potential damage of the external force to the controller, thereby improving the use effect and reliability of the product.

The invention belongs to the technical field of concentricity detection, and particularly relates to a concentricity detection method after vacuum system installation, and the method comprises the following steps: 1, vacuum system preparation: transferring a vacuum system needing concentricity detection to a detection plane, placing the vacuum system, and carrying out the levelness test; 2, tool main body preparation is conducted, specifically, tools with four 0.3 mm small holes are manufactured, two tools are based on a workpiece supporting assembly, and two tools are based on a device mounting flange; and 3, tool main body installation, wherein the four tools are installed at the positions, with the concentricity requirement, in the vacuum system correspondingly, and it is ensured that the tools are tightly connected with the system in a matched mode. According to the invention, the performance and reliability of the vacuum system are improved, high-quality delivery and effective long-term maintenance are also ensured, and the trust and satisfaction of users are further enhanced.

This utility model discloses a PCBA board appearance inspection device, comprising: a support component for placing and fixing a fixture on which the PCBA board to be inspected is fixed; a first appearance inspection component, including a first appearance inspection component and an identification component, wherein the first appearance inspection component can drive the identification component to move relative to the support station, the PCBA board to be inspected has identification information, the identification component is used to collect the identification information, the first appearance inspection component is used to collect upper surface information, and the identification information includes the type and coding information of the PCBA board; a second appearance inspection component, including a second appearance inspection component, which collects lower surface information; and a supplementary lighting component, wherein the light source is set towards the PCBA board to be inspected to provide a light source, the brightness adjustment range of the supplementary lighting component is 10% to 100%, providing a stable light source, ensuring that clear and accurate image information can be obtained under different lighting conditions, avoiding detection errors caused by insufficient or uneven lighting, and improving the stability and consistency of the detection results.

The invention relates to the technical field of pile foundation construction, in particular to a pile foundation air bag pressure sectional type inflation device and a construction method thereof.The device comprises columns installed at the bottom and the side of a pile foundation and pressure air bags arranged at the bottoms of the columns; the inflation main pipe penetrates through the top of the column body and is connected with the pressed air bag through a pressure supporting structure; the sectional type inflation structures are arranged in the side wall of the column body side by side and connected between the pressed air bag and the inflation main pipe, and the problems that in the prior art, the dynamic pressure problem faced by a pile foundation in the construction process is not effectively solved, and under most conditions, existing supporting measures cannot adapt to the change of soil layer stress in real time, and the construction cost is lowered are solved. The problems that the bearing capacity of a pile foundation is reduced due to the fact that the existing air inflation device is used for inflating the pile foundation, and when a traditional air inflation device deals with complex pressure changes, the traditional air inflation device can only achieve an overall air inflation state and lacks adaptive adjusting capacity for local stress changes, so that the pile foundation is prone to being affected by uneven stress, and the structure failure risk is increased are solved.

The utility model relates to the technical field of medical instruments, in particular to a guide catheter assembly which comprises a plurality of layers of sleeve parts, the sleeve parts are thinned step by step from the first step to the Nth step and are sequentially nested, each sleeve part comprises a catheter body, the near end of each catheter body is provided with an operation handle used for controlling the corresponding sleeve part, and the operation handle is connected with the corresponding sleeve part. The far end of the catheter body is in a bent shape relative to the catheter body, and the far end of the catheter body from the first step to the Nth step has the same or different preset curvatures; and the interventional instrument can penetrate through the Nth-step sleeve piece so as to reach the target far-end blood vessel under the guidance of the multi-layer sleeve piece. According to the scheme, the defects that in the prior art, due to the fact that a guiding catheter is not matched with a pulmonary artery anatomical structure, the operation difficulty is large, time is long, and radiation exposure is large are overcome, and an interventional access is rapidly built in interventional therapy with complex and bent blood vessels.