92results about How to "Avoid back and forth" patented technology

The invention discloses an emergency treatment method for sudden gushing of a high confined water stratum foundation pit. The method is characterized by comprising the steps that the water gushing condition is proved, a steel casing is arranged on the water gushing point in a covering manner to serve as an energy-releasing relief well, a simple back pressure platform is arranged at the bottom of the steel casing, the height of the steel casing should be 1 m above the static water level, water gushing kinetic energy can be guided into the steel casing, then, the water head pressure is released, and the water level in the steel casing depends on the pressure difference to be balanced; and meanwhile, the top face of the casing is sealed, communication of internal gas pressure and external gas pressure of the casing is prevented, the backpressure backfilling sealing grouting condition is simulated, a WSS double-tube non-shrinkage two-fluid grouting technology is adopted for carrying out advancing type segmented grouting, and therefore the aims of rapidly controlling water gushing of the foundation pit and reducing the risks of the foundation pit are achieved. According to the method, the number of emergency treatment materials and machine tools is small, the source is convenient, a construction technology is simple, the workload is small, and the construction cost is low; the emergency treatment time is short, and the dangerous omen can be rapidly controlled; and the method is suitable for treating water gushing of the foundation pit in various foundation pit excavation processes, and is particularly best in sudden gushing treatment effect of the high confined water head stratum foundation pit.

The invention aims at providing a two-phase flow interface parameter distribution characteristic experiment device under swinging condition, which comprises a water storage box, a mixing chamber, an experiment section, an air-water separation device, an air compressor, an air storage tank, a swing table, photoelectric converter and a light source, wherein the mixing chamber and the steam-water separation device are respectively installed at both ends of the experiment section, the water storage box is connected with the air-water separation device and the mixing chamber respectively, the air storage tank and the air compressor are connected in parallel and connected with the mixing chamber, and the mixing chamber is also connected with the swing table; and an optical fiber probe and a pressure sensor are installed on the experiment section, the photoelectric converter faces to the optical fiber probe, and the light source faces to the photoelectric converter. The invention further develops and perfects an experiment device for researching the air-liquid two-phase local parameter distribution and transportation mechanism in a large channel under the steady-state condition, foaming is uniform in the experiment, a stable bubble flow can be obtained, and the outlet pressure of the air-water separation device maintains constant by means of gravity separation.

The invention provides a method and device for controlling automatic gear shifting of an automobile. The method comprises the steps that the current running mode is determined according to position signals of a shift lever of the automobile, and the running modes comprise the forward gear mode, the parking gear mode, the reverse gear mode and the neutral gear mode; if the running mode is determined to be the forward gear mode, the target gear is determined according to different running working conditions of the automobile; the running working conditions comprise the sliding working condition, the step of determining the target gear according to the different running working conditions of the automobile comprises the substep of determining the target gear to be the neutral gear if active gear-to-neutral-gear conditions are met, and the active gear-to-neutral-gear conditions comprise the conditions that the running working condition of the automobile is the sliding working condition, the accelerated speed of the automobile is smaller than or equal to zero, and the time interval between gear-to-neutral-gear operations is larger than a threshold value; and when the determined target gear is different from the current gear, control over the gear shifting process is executed. According to the scheme, the brake energy recovery efficiency and the dynamic property of running of the whole automobile can be both considered, and the energy utilization efficiency of the whole automobile is improved.

The invention discloses an operation pillow for a thyroid disease. The operation pillow comprises a bottom plate; a jugalar plate is arranged on the bottom plate; a first airbag is arranged on the jugalar plate; the operation pillow for the thyroid disease enables a patient to more comfortably lie through the first airbag and a second airbag; as the second airbag is designed into an elliptical column shape, the position of a neck is heightened, so that a doctor is wider in visual field during operation; a first electric telescopic rod is arranged on equipment, and a head of the patient can be moved at any moment through the first electric telescopic rod, so that the patient can be more comfortably operated; a second electric telescopic rod is also arranged on the equipment, and the head of the patient can be clamped through the second electric telescopic rod to prevent the patient from moving back and forth during operation; a table lamp is also arranged on the equipment, and the doctor can see more clearly during operation through the table lamp; the equipment is simple in structure, and the height of the surgical pillow for the thyroid disease can be freely adjusted; meanwhile, the best visual field during operation can be displayed.

The invention discloses a method and device for preparing building gypsum by phosphogypsum. The method concretely comprises the steps of (1) filtering slag slurry generated by a phosphoric acid production device; obtaining filter cake which is phosphogypsum; controlling the water content to be less than or equal to 25 weight percent; then, uniformly mixing the phosphogypsum and quick lime according to a mass ratio of (90 to 99.5):(0.5 to 10); performing homogenizing retting for 24 to 72h; (2) feeding the materials subjected to retting into a roasting kiln to be roasted; performing down-flow direct contact with the high-temperature smoke gas in the kiln; ensuring the content of hemihydrate gypsum in discharged materials not to be lower than 60 weight percent; performing homogenizing cooling on the discharged materials; obtaining the building gypsum. A filter press is arranged beside a slag slurry pool for slag slurry generated by the phosphoric acid production device; the filter cake subjected to filter press is phosphogypsum raw materials; the phosphogypsum can be directly mixed and processed with the quicklime to prepare the building gypsum; the long-time outdoor piling aging treatment on the slag slurry can be avoided; the environment pollution is reduced.

The invention discloses a tube bundle heat exchanger comprising a shell forming an annular cavity, wherein a plurality of heat exchange tube rows are arranged in the annular cavity, each of the heat exchange tube rows helically extends along the axial direction of the annular cavity, and the plurality of heat exchange tube rows are staggered in the circumferential direction of the annular cavity.The tube bundle heat exchanger provided by the solution has the advantages of compact structure, light weight and strong heat exchange capacity. It is particularly important that, under the premise ofobtaining the required heat exchange efficiency in the tube bundle heat exchanger, the external heat exchange medium does not need to change the flow direction, that is, enters in the axial direction, and continues to flow in the axial direction inside the annular cavity and finally flows out, thereby avoiding the back and forth turning of the airflow to reduce the flow energy loss of the external heat exchange medium. The tube bundle heat exchanger can also withstand high temperatures and pressures, and can work reliably under conditions that require super heat exchange capacity and in harshworking conditions.

The invention provides an order processing and warehouse-out method, device and system, and a storage medium. A server obtains the slot position capacity and preset virtual capacity of each work station, determines a to-be-processed order of each work station according to the slot position capacity and the virtual capacity, and generates a warehouse-out instruction according to the to-be-processedorder, and carrying equipment carries goods in the to-be-processed order out of the warehouse according to the warehouse-out instruction. According to the scheme, more orders can be distributed at atime, more goods can be carried out of the warehouse at a time, and the warehouse-out efficiency is improved.

The invention discloses a multi-task delivery method and device of a robot and the robot. The method comprises the following steps of acquiring basic information of at least one waybill; judging whether a preset starting condition is met or not; acquiring a departure floor and a target floor of each waybill, dividing the waybills with the same target floor into a waybill group, and sorting all waybill groups according to a sequence of the target floors and the departure floors from near to far; sorting all waybills of each waybill group according to a principle that a moving distance is the shortest; and enabling the robot to sequentially complete all the waybills according to the sorting result. According to the invention, a delivery sequence of the plurality of delivery tasks is integrally planned according to the target positions, the relative distances and the task creation time of the plurality of delivery tasks so that a central controller does not need to schedule which task therobot delivers in the next step; and the robot is prevented from running back and forth among a plurality of task points while the delivery efficiency of the robot is improved so that the intelligence and flexibility of the robot are improved.

The invention relates to an on-line red steel elbow straightener which comprises a stander (1) and an upper straightening roller group and a lower straightening roller group which are arranged on the stander (1), wherein each of the upper straightening roller group and the lower straightening roller group consists of a plurality of straightening rollers (7); the central lines of the straighteningrollers (7) of the upper straightening roller group are parallel to one another and positioned on the same horizontal line, and the central lines of the straightening rollers (7) of the lower straightening roller group are parallel to one another and positioned on the same horizontal line; and the straightening rollers (7) of the upper straightening roller group and the straightening rollers (7) of the lower straightening roller group are staggered from each other along the horizontal direction. According to the on-line red steel elbow straightener, the problem that the head of a bar materialwhich is discharged from a rolling machine is bent is solved, the yield is increased, a large amount of time and a large quantity of troubles are saved for the subsequent working procedure, and the logistics of the whole production loop is relatively smooth; and therefore, a phenomenon of repeated reversing is avoided, the production efficiency is improved, the manmade mixed steel risk is reduced, and the burden and the pressure of workers are reduced.

A water pressure jetting type well completion construction method of a dewatering tube well comprises steps as follows: S1, a well hole is positioned; S2, a protective barrel is produced, and jetting tubes are mounted; S3, a combined structure of the protective barrel and the jetting tubes is placed in the position of the well hole positioned in S1; S4, jetting hole forming operation is performed; S5, a water filtering well tube is mounted; S6, backfilling of an inverted filter material is performed; S7, the protective barrel and the two jetting tubes are pulled out of the well hole; S8, well washing is performed; S9, a submersible pump and a water outlet pipe are mounted, and test pumping is performed. The well completion construction method meets construction requirements of construction sites having various terrain conditions, the construction cost is reduced, and the construction efficiency is improved.

The invention discloses a underwear cotton cup forming device. The underwear cotton cup forming device comprises an upper mold, a lower mold, a guide rod, a guide sleeve, a pressing cylinder and a return spring; the upper mold includes an upper mold base, an upper template and a forming convex mold; the upper template is mounted on the upper mold base; the forming convex mold is fixed on the upper template; the lower mold includes a lower mold base, a lower template and a forming concave mold; the lower template is mounted on the lower mold base; the forming concave mold is mounted on the lower template; the guide rod is fixed on the lower mold base; the return spring coats the guide rod; the guide sleeve is mounted on the upper mold base; the guide rod penetrates through the guide sleeve; the return spring is limited between the guide sleeve and the lower mold base; and the pressing cylinder is fixed on the upper mold base, and pushes the upper mold base to press down. The underwear cotton cup forming device uses a machine for automatically molding, greatly improves the forming efficiency, replaces manual sewing, largely reduces the labor capacity, and reduces the labor costs of enterprises.

The invention discloses a liquid calcium carbide granulating device. The liquid calcium carbide granulating device comprises a granulating tower, a first air blowing device, a second air blowing device and a granulating machine, wherein a granulating cavity is formed in the granulating tower; an outlet and an inlet are respectively formed in the bottom part and the top part of the granulating cavity; a first air inlet and a second air inlet are formed in the side wall of the granulating cavity; the first air blowing device is connected with the first air inlet; the second air blowing device is connected with the second air inlet; the granulating machine is arranged in the granulating cavity; the granulating machine is configured in a way that liquid calcium carbide entering from the inlet is converted into a liquid calcium carbide film and the liquid calcium carbide film is thrown away from the granulating machine; the first air blowing device is configured in a way that the liquid calcium carbide film thrown away from the granulating machine is divided into multiple liquid calcium carbide drops by division air entering the granulating cavity and the multiple liquid calcium carbide drops are discharged from the outlet after being cooled into calcium carbide granules by cooling air entering the granulating cavity. According to the liquid calcium carbide granulating device disclosed by the invention, the production efficiency is high, the utilization rate of factory area is high, and environment pollution caused by a smashing process can be avoided.

The invention provides an online teaching platform and system. The platform comprises a user side, a cloud server and a database. The user side comprises a student side, a teacher side and an administrator side; the student side is used for performing one or more of the functions of curriculum viewing, curriculum collection, comment adding, comment viewing and announcement viewing on a student user; the teacher side is used for performing one or more of course creating, video uploading, comment adding, comment viewing and course deleting functions on a teacher user; the administrator side is used for performing one or more of administrator logout, teacher management, announcement management, student management, course management and comment management functions; the cloud server is used for cloud storage of at least one video and user information uploaded by the teacher terminal; and the database is used for storing the storage path corresponding to each video uploaded by the teacher end. The scheme of the invention can better help students to learn online.

The invention relates to an elevator base station adjusting method. The elevator base station adjusting method comprises the steps that summon data of each elevator in an elevator group is obtained, and the average summon service number of each floor and the average summon service number of people of each floor of the elevator group are calculated according to the summon data; and then according to the average summon service number of each floor and the average summon service number of people of each floor, an initial evaluation value of each floor and a middle evaluation value of each floor in the elevator group are sequentially calculated, and finally an evaluation value of each floor is obtained. An elevator base station adjusting plan is generated according to the evaluation value of each floor, average passenger waiting time can be shortened, and the elevator service efficiency is improved; and meanwhile, the number of elevator idle operation can be reduced, a great deal of unmeaning base station going and back of the elevator is prevented, elevator energy consumption is integrally reduced, elevator abrasion is reduced, and the life of the elevator is prolonged, and thus the base station is provided with practical traffic flow meeting a building where the elevator group is located.

The invention discloses a local delivery method and device of a robot and the robot. The method comprises the following steps of acquiring basic information of at least one waybill; judging whether apreset starting condition is met or not; delivering the target waybills in sequence according to a principle that the shorter the remaining delivery time is, the earlier the delivery is; completing acurrent scheduling task of a priority delivery point location according to the principle that the closer the floors are, the earlier the delivery is, and the shorter the moving distance is when the floors are the same; and obtaining a next target waybill or a next priority delivery point location till that all the waybills are delivered. According to the invention, a delivery sequence of the plurality of delivery waybills is arranged in real time according to a dimension of a scheduling task, remaining delivery duration, a floor distance and a leveling movement distance so that a central controller is not needed, the delivery efficiency of the robot is improved, the robot is prevented from running back and forth among a plurality of task points, and intelligence and flexibility of the robot are improved.

The invention relates to the technical field of pipe gallery anti-seismic hanging frames, in particular to a novel assembly type pipe gallery anti-seismic supporting and hanging frame which comprisesa hoisting mechanism, a damping mechanism and a mounting mechanism. The hoisting mechanism comprises a left hanging bracket and a right hanging bracket which are opposite to each other, vertical sliding grooves are formed in the inner sides of the two hanging brackets, and sliding blocks are arranged in the sliding grooves in a sliding mode. Supporting bases are fixedly arranged in the sliding grooves, and supporting springs used for supporting the sliding blocks are arranged at the top ends of the supporting bases. The damping mechanism comprises a connecting frame, two sets of inclined supporting rods, two sets of first sliding blocks, a first buffer spring, a second sliding block, two sets of fixing plates and a second buffer spring, and the mounting mechanism is mounted at the top endof the second sliding block. Vibrations in the vertical direction can be buffered through the supporting springs and the first buffer spring, vibrations in the horizontal direction can be buffered through the second buffer spring, and therefore vibration force is prevented from being transmitted back and forth between the supporting and hanging frame and a pipe gallery, the pipe gallery is protected, and the use reliability is improved.

The invention discloses an earpiece polishing machine, aims to provide the earpiece polishing machine, and can mill and polish earpieces. The earpiece polishing machine is characterized by comprising a frame, a conveying belt arranged on the frame, and a conveying drive for urging the conveying belt for transmission; the conveying belt is provided with clamping devices for clamping the earpieces; the frame is additionally provided with opening mechanisms for opening the clamping devices, milling mechanisms for milling the earpieces, polishing mechanisms for the earpieces and cleaning mechanisms for cleaning the earpieces after milling and polishing; the opening mechanisms, the milling mechanisms, the polishing mechanisms and the cleaning mechanisms are arranged around the conveying belt in sequence; the opening mechanisms include loading starting devices and unloading starting devices; the earpieces are clamped on the clamping devices through the loading starting devices; and the conveying belt drives the clamping devices to convey to the milling mechanisms, the polishing mechanisms, the cleaning mechanisms and the unloading starting devices in sequence.

The invention relates to a non-isothermal forming device and technique for continuous fiber reinforced thermoplastic composite material. The non-isothermal forming device for the continuous fiber reinforced thermoplastic composite material comprises a male die assembly, a female die assembly, an edge pressing assembly, a supporting and guiding assembly, a demolding assembly and a temperature control assembly. The non-isothermal forming technique for the continuous fiber reinforced thermoplastic composite material comprises the following steps that a female die base and a male die are preheated, a blank is placed between a female die and an edge pressing ring, the blank, the female die and the edge pressing ring are put into an external heating device to be preheated to a target temperatureand then put into the female die base, the male die moves down to complete the deformation of the blank, heating inserts are then taken away, the liquid circulation is carried out to cool the dies and a workpiece, and finally, the dies are opened and the workpiece is taken out. According to the non-isothermal forming device and technique for the continuous fiber reinforced thermoplastic compositematerial, a traditional composite material hot-press forming technique is simplified, the equipment requirement is reduced, meanwhile, the high and low temperature circulation working conditions of aheating device are avoided, and the forming quality is guaranteed.

The invention discloses a multi-task scheduling method and device of a robot and the robot. The method comprises the following steps: acquiring a plurality of different types of tasks and basic information of each task; establishing a corresponding service table according to an execution process of each task, wherein the service table includes at least one continuous local scheduling task; and obtaining the current local scheduling task of each task and the current target point location corresponding to the current local scheduling task, and if the target floors where the current target pointlocations are located are different, sequentially executing the complete process of each task according to a preset priority sequence. According to the invention, the robot can decide the execution sequence of a plurality of tasks like a person, which means that the execution sequence of a plurality of types of tasks is arranged in real time according to the dimension of the local scheduling task,a central controller is not needed for scheduling, the working efficiency of the robot is improved, and the robot is prevented from running back and forth among a plurality of task points; and the intelligence and the flexibility of the robot are improved.

The invention discloses a local scheduling method and device of a robot and the robot. The method comprises the following steps: acquiring basic information of at least one waybill; judging whether apreset starting condition is met or not; delivering target waybills in sequence according to the principle that the shorter the remaining delivery time is, the earlier the delivery is; completing allscheduling tasks of the priority delivery floor according to the principle that the more the current scheduling tasks on the same target floor are, the earlier the scheduling tasks are delivered; andobtaining a next target waybill or a next priority delivery floor until all waybills are delivered. According to the invention, the delivery sequence of a plurality of delivery waybills is arranged inreal time according to the remaining delivery duration, the scheduling task number of the same floor and the floor distance, and the multiple scheduling tasks of the same floor are completed at a time; and a central controller is not needed, the delivery efficiency of the robot is improved, the robot is prevented from running back and forth among the multiple task points, and therefore, the intelligence and flexibility of the robot are improved.

The invention discloses an air compressor jigger convenient to operate. The air compressor jigger convenient to operate comprises a small gear, a large gear ring, a speed reducer, a support and an electric cabinet, wherein the two sides of the top of the support are provided with a second fixing plate through first bolts, the top ends of the first bolts are connected with first nuts through threads, a long groove is formed in the top of the second fixing plate, the top of the long groove is provided with a first fixing plate through a specially-made double-head bolt, the specially-made double-head bolt is sleeved with a special gasket and a specially-made elastic pad, the top of the fixing plate is provided with a speed reducer through a second bolt, the second bolt is sleeved with a second elastic pad and a second gasket, one side of the speed reducer is provided with a double-shaft end motor through a fixing bolt, one side of the double-shaft end motor is connected with an input shaft of the speed reducer, and the other side rotating shaft of the double-shaft-end motor is provided with a hand wheel through a screw. The air compressor jigger is convenient to operate, can realize point-to-point and continuous rotation, is convenient to operate and use and meets the disc-to-turn requirement of an air compressor shaft.

The invention provides an intelligent chemical fiber yarn winding device which comprises a workbench, a movable frame structure, longitudinal supporting plates, a transverse sliding rail, a rotating motor, a threaded rod, a sliding block, a storage drive frame structure, a winding roller, a protection disc, a driven gear, an adjustable supporting frame structure, a buffer support structure, a control frame, a controller, a first switch, a second switch, a third support and a locating ring. The movable frame structure is mounted on the lower portion of the workbench. The number of the longitudinal supporting plates is two, and the longitudinal supporting plates are mounted at the front end and the rear end of the right side of the upper portion of the workbench through bolts. Bidirectionalair cylinders are embedded to the front portion and the rear portion of the left side of the workbench, the protection disc can eject the winding roller out from a semicircular storage groove, the protection disc is pulled leftwards, and therefore the winding roller can be dismounted from the semicircular storage groove conveniently; and the driven gear is mounted at the middle position of the front side of the protection disc through a bolt, and the protection disc and the winding roller can be driven to rotate easily.

The invention discloses a dust-free room, which comprises a cabin body, at least one cabin door which is arranged on the sidewall of the cabin body and a first dust exhausting device which is arranged in the cabin body; the dust-free room further comprises a first material tray which is arranged in the cabin body and is vertical to a first sidewall which is not provided with the cabin door and comprises a plurality of meshes; a material inlet which is arranged on the first sidewall and is arranged on the upper side of the first material tray; a second dust exhausting bag which is arranged in the cabin body and on the upper side of the material inlet and is used for preventing the dust particles from entering into the cabin body along with the material which enters into the cabin body from the material inlet; and a material outlet which is close to the inner bottom of the cabin body and is arranged on the first sidewall and is used for moving out the material. With adoption of the dust-free room, functions of convenient operation and improving cleanliness can be achieved by arranging the material inlet and the material outlet on the sidewall of the cabin body, setting a mesh-shaped material tray in the cabin body and arranging the dust exhausting device on the upper side of the material tray.

The invention provides an access control checker for vehicles. A controller module and a vehicle information acquisition module are arranged to be used for verifying vehicle information, reserve information, and payment information and releasing vehicles when the vehicles are driven to enter and exit a parking lot, the above processes are all automatically carried out without human intervention to improve the management quality of the parking lot; when the vehicles are driven to enter and exit the parking lot, the license plate information is identified, so that the behaviors of driving stolen vehicles, stealing license plates, covering or falsifying the license plates of criminals in the parking lot are avoided; a wireless transmission module and a display module are arranged to be used for transmitting or displaying the number of current waiting vehicles in the parking lot, and the number and position of current remaining parking spaces in the parking lot for vehicle owners, so that the traffic jam nearby the parking lot is avoided, and the time is saved for the vehicle owners; a parking space guidance module is arranged, so that the vehicle owners can be guided by the module to find out the parking spaces, and thus the reciprocating driving and meeting events of each vehicle owner are avoided, the parking efficiency is improved, and the management quality of the parking lot is further improved.

The invention discloses a DC tie line power optimization method considering the adjustment cost of reactive power equipment belonging to the technical field of power system operation and dispatching.Firstly, according to the reactive power regulation characteristics of the traditional HVDC, the feasible and infeasible intervals of the transmission power of the HVDC tie line are determined, so asto reduce the operation times of the reactive power equipment. Secondly, the cost model of reactive power equipment regulation is established to optimize the operation times of reactive power equipment to avoid the frequent operation of reactive power equipment on both sides of DC and to reduce the loss of reactive power equipment life. Finally, the power optimization model of DC tie line is established, which not only improves the proportion of wind power consumption, but also improves the comprehensive benefits of the transmission and reception power network. The DC tie line power optimization method fully excavates the coordination and optimization benefit between the flexible regulation ability of the DC tie line and the DC reactive power regulation characteristic, absorbs the wind power in a larger space range, improves the absorbing level of the wind power resources, and realizes the operation economy of the DC cross-region interconnected power network.

The invention discloses an oil-driven model airplane unmanned helicopter with an aerial refueling function, and particularly relates to the technical field of unmanned aerial vehicles. The oil-drivenmodel airplane unmanned helicopter is composed of a fuel plant protection machine and a matching machine which are each composed of a rack, a diesel engine, a supporting frame, a transmission part andwings and are matched with each other for refueling through a refueling assembly. An oil receiving tank and an oil filling tank are installed outside the fuel oil plant protection machine and the matching machine respectively, one end of the oil filling tank is connected with a connecting pipe, the end of the connecting pipe is fixedly connected with an anti-overflow self-sealing piece, and the other end of the anti-overflow self-sealing piece is fixedly connected with an oil receiver. According to the oil-driven model airplane unmanned helicopter, the fuel oil plant protection machine and the matching machine are matched for refueling through the refueling assembly, the matching machine is only provided with an oil tank without a plant protection structure and is responsible for supplying oil to the fuel oil plant protection machine to guarantee endurance, the fuel oil plant protection machine can be prevented from rising and falling back and forth, trouble and labor are saved, operation time can be prolonged, and operation efficiency is improved.

The invention relates to a multifunctional toolbox suitable for uneven ground operation. A plurality of lifting support legs are arranged on a working platform. A suction mechanism capable of suckingthe toolbox is arranged on the upper end surface of the working platform. The lifting support legs can independently adjust the vertical position, and keep the working platform horizontal. The multifunctional toolbox provides a good operation environment for stairwells and uneven ground operations, avoids repeated trips of test personnel between a test site and the storage location of the toolbox,and prevents a test tool from falling at high altitude due to insufficient operating space, so that the safety factor of the test is improved, the test time is saved, and the work efficiency is greatly improved. Permanent magnets or electromagnets can be disassembled, so that the adjustment platform can be used directly as an operating platform or a connection toolbox. The overall manufacturing cost is low, and the multifunctional toolbox is easy to carry, and convenient to use on site.

The invention relates to a stoma wound dressing changing cart, which comprises a chair, wherein the chair comprises a chair back, a chair seat, a foot supporting plate, a central supporting pillar, chair legs and bottom roller wheels, wherein connecting frames are fixed to the central supporting pillar; a medical waste garbage bag holding rack, a flushing apparatus bracket and a treatment tray bracket are fixed to the connecting frames; a camera bracket and an illuminating bracket are fixed at the back of the chair back; and a foot fixing device and a flushing bearing tray are arranged on the foot supporting plate. The dressing changing cart, which is convenient to move and complete in function, provided by the invention has the beneficial effects that the dressing changing treatment cart integrates functions of illuminating, case collection, measurement, treatment, caring and storage, and the dressing changing cart is capable of effectively avoiding secondary pollution and avoiding occupational injuries, so that the working efficiency of medical personnel is effectively improved.

The invention provides a teaching demonstration device, which comprises a storage frame, adjustable lifting frame structures, labor-saving moving frame structures, longitudinal limiting frames, a lifting display frame structure, a side edge positioning insertion pipe, a convex block, a movable cover plate, an inverted U-shaped frame, an automatic limiting frame structure, a storage frame, a display screen, a side edge insertion frame, a writing board, a rubber cushion block, a storage battery and a control button. The adjustable lifting frame structures are installed at the four corners of thelower portion of the storage frame; the labor-saving moving frame structures are mounted below the adjustable lifting frame structures; the longitudinal limiting frames are installed on the left sideand the right side of the inner wall of the storage frame through screws. Stretching air cylinders are inserted into the left side and the right side of the bottom of the storage frame, meanwhile, the upper portions of the stretching air cylinders are in bolted connection with a connecting plate, the stretching air cylinders can be conveniently used for driving the display frame to flexibly ascend and descend according to needs during use, and display objects in the display frame are conveniently displayed.