194results about How to "Change direction" patented technology

The invention relates to the technical field of finned heat exchangers, and discloses an adjustable finned heat exchanger which comprises a shell, air passing openings are formed in the two sides of the shell, a plurality of heat exchange modules used for heat transfer are arranged in the shell, the heat exchange module located in the middle is fixed to the shell, and the air passing openings are formed in the air passing openings. The other heat exchange modules are slidably connected with the shell through guide mechanisms, the distance between the heat exchange modules can be adjusted through adjusting mechanisms, the heat exchange modules are communicated through second corrugated pipes, and fans are fixed to the inner sides of the two ends of the shell through bolts. According to the heat exchanger, through the movable heat exchange module, auxiliary shaking can be conducted on water drops, the water drops fall off from the heat exchange module, the retention time of the water drops on the heat exchange module is shortened, corrosion of the water drops to the heat exchange module is reduced, and the service life of the heat exchanger is prolonged.

The invention relates to the technical field of electronic devices, in particular to a monomolecular electric memristor based on dipole control and a preparation method thereof.The monomolecular electric memristor comprises a molecular heterojunction, and the molecular heterojunction is formed by connecting dipole molecules and graphene point electrodes through amido bonds; the dipole molecule comprises an amide structure based on a carbazole nitrogen-containing heterocyclic ring unit, under the action of an external electric field, a side chain chemical bond of the dipole molecule can rapidly rotate, the size and direction of an intramolecular dipole moment can be changed, the molecule can be rapidly and stably switched among different resistance states, and the read-write speed of the memristor is remarkably improved; the storage state is stably kept under the power-off condition, and the long-term stability and reliability of the memristor function are ensured. The preparation method comprises the processes of introducing dipole molecules and forming amido bonds between the dipole molecules and the graphene point electrode, and the preparation method is simple and convenient to operate, mild in condition and beneficial to large-scale production.

The utility model discloses a vertical steam generator device, which relates to the field of waste heat boiler devices and comprises a smoke inlet pipeline, an upper tube plate, a barrel, a smoke tube, a lower tube plate and a smoke outlet pipeline. And after passing through the through holes of the upper tube plate, the smoke tube and the through holes of the lower tube plate, the liquid leaves from the smoke outlet pipeline, after entering from the water inlet pipeline, the liquid is subjected to heat exchange to become a steam-water mixture, and the steam-water mixture sequentially passes through the cavity and the steam collecting pipeline and finally enters the steam collecting box. According to the utility model, the waste heat boiler is arranged in the vertical flue, so that the occupied area of the waste heat boiler is reduced, and the whole arrangement of the waste heat boiler is compact.

The fumigating bed comprises a bed body, a fumigating part and a fumigator are arranged on the bed body, the fumigating part comprises a groove body, the upper end of the groove body is open, a moving part is arranged in the groove body, a fumigating spray head assembly is arranged on the moving part, and the moving part drives the fumigating spray head assembly to move in the X-axis direction, the Y-axis direction and the Z-axis direction; the fumigation spray head assembly comprises a deformation base plate and an adjusting mechanism used for adjusting the radian of the deformation base plate; a plurality of spray head units are arranged on the upper surface of the deformation base plate; and the fumigator is connected with the nozzle unit through a pipeline. The fumigation spray head assembly is installed on the moving device, the moving device can drive the fumigation spray head assembly to move in the X-axis direction, the Y-axis direction and the Z-axis direction, and therefore the fumigation spray head assembly can reach the needed position according to the actual requirement of a user, accurate fumigation is conducted on the target position on the body of the user, pertinence is high, and the fumigation effect is effectively improved.

A finger orthosis comprises a sheath worn outside a palm, an orthosis support and a joint support. The joint support comprises a connecting arm and a suspension arm, the suspension arm is arranged on the connecting arm so that the connecting arm can be suspended, the correcting support is movably connected with the connecting arm, and the fixing base is locked after the correcting support axially moves along the connecting arm according to the length of the phalanx or the correcting stress position. And the traction mechanism is assembled with the sheath and is arranged on the back of the hand. The traction piece is in contact with the joint supports, one end of the traction piece is fixed to the joint support at the far end of the finger, the other end of the traction piece is arranged on the traction base, acting force is applied to the traction piece, the relaxation state of the traction piece is adjusted, and the finger with flexor tendon contracture is corrected. Compared with an existing fixing support, the finger orthosis provided by the invention has the advantages that the operation intensity and operation time consumption are obviously reduced, the articular surface is not damaged, subcutaneous blood vessels and nerves of fingers are not easily damaged, and the risk of disability caused by bleeding and nerve touch is reduced or avoided.

The invention relates to the technical field of acrylonitrile catalyst production, in particular to a pulping device and a pulping process for acrylonitrile catalyst production, the pulping device comprises a homogenizing mechanism, the homogenizing mechanism comprises a tank body and further comprises a sealing cover arranged above the tank body and used for feeding, a stirring pulping assembly used for stirring slurry is arranged above the sealing cover, and the stirring pulping assembly is arranged above the tank body and used for stirring the slurry. The slurry extrusion device comprises a tank body and an extrusion box arranged below the tank body, an extrusion plate used for pushing slurry and a driving assembly used for driving the extrusion plate are arranged in the extrusion box, and the extrusion plate can extrude the slurry in the extrusion box; the extruded slurry can be discharged into the tank body through the first guide pipeline to realize circulating conveying of the slurry, so that one-way circulating operation by adopting a circulating pump is avoided, the maintenance frequency of each circulating part is reduced, synchronous circulation of the slurry on the left side and the right side of the tank body can be realized in a linkage manner, and the production efficiency is improved. And compared with a traditional circulating pump, one-way circulation is more efficient.

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 belongs to the technical field of EMC testing, and particularly relates to an adjusting device for EMC testing, which comprises an EMC testing table, the top of the EMC testing table is provided with a circular groove, the center of the circular groove is rotatably provided with an angle adjusting shaft, and the top end of the angle adjusting shaft extends out of the circular groove and is provided with a rectangular slot. A limiting inserting frame is slidably connected into the rectangular inserting groove, the top end of the limiting inserting frame extends upwards and is fixedly connected with an equipment positioning plate, and the equipment positioning plate is used for fixing equipment to be tested. In the invention, the direction can be adjusted before testing, a servo motor I is started and drives a driving gear to rotate, and under the meshing transmission of the driving gear and an adjusting gear ring, an angle adjusting shaft drives a limiting insertion frame to rotate, so that the orientation of an equipment positioning plate is moved to change the direction of to-be-tested equipment; and due to the variability of the mounting position of the to-be-tested equipment by the test equipment positioning mechanism, the position of the to-be-tested equipment can be adjusted more comprehensively, and the range is wider.

The invention discloses an external ring main unit dehumidification and condensation prevention device, which comprises a cabinet body, two groups of ventilation seats are arranged in the cabinet body, a net machine part is erected on the surface of the ventilation seat at the lower part in the cabinet body, an inner plate assembly is arranged in the cabinet body, and the inner plate assembly comprises a partition plate and a flow guide plate; the partition plate is arranged at the position, close to the periphery of the net machine component, in the cabinet body, an airflow channel is formed between the partition plate and the cabinet body, buckling grooves are formed in the positions, close to the partition plate, of the upper side and the lower side in the cabinet body respectively, and the partition plate is connected with the output ends of the two execution electric cylinders through a C-shaped frame. The execution electric cylinder drives the partition plate to move up and down in the cabinet body; according to the ring main unit, the dehydration effect can be guaranteed while the gas flow direction is effectively changed, the energy utilization rate is improved, and the ring main unit can dehumidify the unit assemblies firstly and then dehumidify the cabinet wall.

The utility model provides a material sorting vibration disc which comprises a bottom plate and side plates arranged on the two opposite sides of the bottom plate, the two side plates and the bottom plate are matched to define a flow channel, and the flow channel can contain a plurality of materials to be sorted at the same time. A plurality of through holes are formed in the bottom plate in a penetrating manner, the aperture of each through hole is matched with that of a standard material, and the through holes are communicated with the runner; the flow channel is sequentially divided into a first area, a second area and a third area in the material conveying direction; the first area, the second area and the third area are all provided with the through holes, and the bottom plate at the second area or the third area is provided with salient points. Meanwhile, the utility model further provides a vibration disc assembly. Compared with the prior art, the material sorting vibration disc and the vibration disc assembly can improve the sorting efficiency.

The present invention discloses a concentrate recovery device, including a concentration tank, a feeding mechanism, and the feeding mechanism is fixed in the concentration tank. An overflow port is provided at the top of the concentration tank, and a discharge port is provided at the bottom. The feeding mechanism includes a feeding fixed pipe, a flow stabilizing cylinder sleeved on the outside of the feeding fixed pipe, and the feeding fixed pipe is a cavity with a top or / and side opening, and the opening is the access point of the feeding pipe. A plurality of discharge holes penetrating the outside are provided at the bottom of the cavity, and the flow stabilizing cylinder and the feeding fixed pipe are arranged at intervals, and the discharge hole is placed in the turbid layer of the slurry in the concentration tank. The beneficial effects of the present invention are as follows: by installing the discharge hole in the turbid layer, the feeding point can be lowered to avoid making the clear water layer turbid. Through the flow blocking effect of the flow stabilizing cylinder, the slurry at the discharge hole encounters the flow stabilizing cylinder, the speed is reduced, and the flow direction is also changed, which reduces the impact force of the feeding, improves the feeding effect, increases the sedimentation speed of the entire sedimentation process, and improves the recovery rate.

The utility model relates to the technical field of unmanned aerial vehicle rotor protection, in particular to an unmanned aerial vehicle rotor protection device. The protection device comprises a protection cover which surrounds the periphery of the unmanned aerial vehicle rotor wing through a fixing assembly. The upper end and the lower end of the protective cover are open, any cross section of the protective cover is round, and the caliber of the upper end of the protective cover is larger than that of the lower end of the protective cover. By designing the big-end-up protective cover with two open ends, the flared protective cover further increases the flow velocity of the rotor wing airflow on the premise of not changing the original airflow of the unmanned aerial vehicle rotor wing, thereby increasing the lift force of the unmanned aerial vehicle.

The present application relates to two five-way valve field, especially to a kind of double-layer coaxial two five-way valve, including shell and turbo fan for supercharging, hollow spool is matched and installed in the shell, the shell one end is equipped with motor for driving spool reciprocating movement, the other end is equipped with the end head of intercommunication, the end head is opened with atmospheric air inlet and atmospheric air outlet, the shell is provided with with turbo fan inlet intercommunication's outlet air duct and with turbo fan outlet intercommunication's inlet channel, and the public end output channel capable of forming positive and negative pressure inside, the spool outside is formed by several fan-shaped ring baffles and longitudinal valve plate several air exchange air duct, the device only needs to utilize motor to drive spool reciprocating movement to make airflow move according to preset mode, and it is ingenious in design, and low in cost.

The utility model discloses a clamp swing arm die repairing device support, which relates to the technical field of supports, and comprises a mounting plate, the top of the mounting plate is rotatably provided with a rotary drum, the inner side of the rotary drum is slidably provided with a lifting platform, and the top of the lifting platform is circumferentially and fixedly provided with a plurality of angle adjusting components at equal intervals; and a worm wheel is fixedly installed on the outer surface of the rotary drum, two lug plates are fixedly installed on one side of the top of the installation plate, a worm is rotationally installed between the two lug plates, and the worm is connected with the worm wheel in a meshed mode. The multiple angle adjusting assemblies can be used for installing die repairing devices of different specifications, when the clamp swing arm is repaired, firstly, the installation plate is fixedly installed at a proper position, the die repairing devices are located beside the clamp swing arm, then the motor can be started to drive the rotary drum to rotate through the worm and the worm gear, the proper die repairing device is selected, and the die repairing device is used for repairing the clamp swing arm. Through the angle adjusting assembly, the orientation and the inclination angle of the die repairing device can be changed, and flexible use of the die repairing device is achieved.

The utility model discloses a pipeline detection robot capable of actively turning and jumping to avoid obstacles by means of medium thrust, relates to the field of pipeline robots, and aims to provide a pipeline detection robot which is low in energy consumption and convenient to move and turn. The pipeline detection robot comprises a robot body, a steering control mechanism and a bouncing system are arranged on the robot body, the steering control mechanism is connected with an umbrella-shaped structure through a steering frame, the umbrella-shaped structure comprises a lead screw driving motor, the lead screw driving motor drives a lead screw to rotate, and the bouncing system drives the lead screw to rotate. A lead screw is arranged on the robot body, a middle sliding block is arranged on the lead screw, an umbrella support short rod is movably connected to the middle sliding block, an umbrella support rod is hinged to the umbrella support short rod, an umbrella wrapping skin is arranged on the umbrella support rod, and the bouncing system comprises two push-pull type electromagnets arranged on the lower portion of the robot body.

The utility model discloses an air purification system for a pasture. The air purification system of the pasture comprises an air taking chimney, a gas guiding device, an acid liquor deodorization mechanism and an activated carbon deodorization mechanism. The gas guiding device comprises a Y-shaped shell, a V-shaped beam, a sealing electromagnetic valve and a gas detector, the V-shaped beam is arranged in the shell, a first conveying channel and a second conveying channel are formed by the outer wall of the V-shaped beam and the inner wall of the shell, and one end of the sealing electromagnetic valve is hinged to one end of the V-shaped beam; the acid liquor deodorization mechanism is connected with the first conveying channel; the activated carbon deodorization mechanism is connected with the second transporter. The acid liquor deodorization mechanism and the activated carbon deodorization mechanism are arranged and switched under different air temperatures, the problems that liquid is prone to freezing and air in a pasture is difficult to purify when the air temperature is low in winter are solved, meanwhile, the problems that when the temperature is low and the odor concentration is relatively low, odor purification is large in power consumption and high in cost are solved, and meanwhile, continuous purification throughout the year is achieved; and the equipment cannot be stopped after long-term operation and is difficult to maintain.

The present application provides a kind of inner slag discharging device and its slag discharging method, it includes high wear-resistant obturator, drill bit drill rod device, venturi water and drill slag dry-wet separator, the drill bit drill rod device is located in high wear-resistant obturator, drill slag dry-wet separator is connected with drill bit drill rod device by venturi water.The flow direction of drill slag can be changed by changing the running direction of slag discharging medium, so as to reduce the scouring, soaking and friction of slag discharging medium and drill slag on the hole wall, which is beneficial to the formation of drilling hole;It can achieve the purpose of point coring by achieving "falling and discharging simultaneously";Drilling cuttings can be well collected, which is beneficial to the civilized production of construction site and prevents dirtiness and disorder;If inert gas is used for slag discharging during construction, it can also achieve the purpose of inhibiting spontaneous combustion of coal seam.Through the above technical scheme analysis, the device is theoretically feasible and the operation is reliable, which provides good drilling quality for casing, greatly improves the success rate of drilling and casing and the extraction effect.

The utility model discloses a flame-proof type control box production drilling device, and relates to the technical field of electrical control box processing, the flame-proof type control box production drilling device is provided with a rotary clamping assembly, a protective frame, flame-proof glass, a pore plate, a material collecting groove and a recycling box, the rotary clamping assembly can fix the two ends of a control box, and the protective frame can fix the two ends of the control box; the control box is prevented from deviating or falling off in the drilling process, the rotary clamping assembly can clamp the control box and also can change the height and the orientation of the control box, automatic control box overturning safety operation is achieved, the whole drilling table is covered with the protection frame and the explosion-proof glass, the explosion-proof effect is achieved, and the drilling efficiency is improved. The explosion-proof glass has the advantages that the explosion-proof glass is arranged in the control box, the control box is prevented from exploding due to high temperature to influence the surrounding environment, further diffusion of explosion can be avoided, meanwhile, a pore plate, a material collecting groove and a recycling box are matched, sweeps generated in the drilling process can be collected into the recycling box, and the sweeps can also be prevented from circulating to the outside of the explosion-proof glass to influence the surrounding air.

The utility model belongs to the field of medical care especially a bed frame structure of medical care bed, its including medical care bed base, this medical care bed's bed frame structure still includes: the lifting box is bolted connection in the top of medical care bed base, the rotary motor is bolted connection in the middle part of lifting box, the rotary seat is key connection in the output of rotary motor, the bed frame subassembly, the bed frame subassembly includes support frame, connecting seat and bed board frame, the top of rotary seat is bolted connection with the bottom of support frame, the top of connecting seat is bolted connection with the bottom of bed board frame, the surface of connecting seat is rotatory connection with the top of support frame, in the utility model, through the movement of adjusting lever and support rod can adjust the inclination angle of bed board frame, can let the patient in the case of lying down, the upper body is lifted, is convenient for various activities, the rotation of rotary seat can drive bed board frame to rotate, changes the orientation of bed board frame.

The utility model relates to the technical field of air conditioner equipment, and discloses an evaporation cooling air conditioner air opening adjusting structure which comprises an air conditioner body, an air outlet is formed in the surface of the air conditioner body, a baffle is arranged at the air outlet, mounting mechanisms are arranged at the top and the bottom of the baffle correspondingly, and the baffle is connected with the air conditioner body through the mounting mechanisms. A distance exists between the baffle and the air outlet, the baffle can move relative to the installation mechanism so that the baffle can be away from or close to the air outlet, the installation mechanism comprises sliding seats fixedly installed at the top and the bottom of the baffle, and first arc-shaped plates are installed in the sliding seats in a sliding mode. The baffle is installed on the air conditioner body and can move relative to the installation mechanism, when direct blowing is not needed, the baffle is moved to the air outlet, the baffle can interfere with airflow, the airflow direction is changed, and direct blowing is avoided; when the air conditioner is normally used, the baffle is moved to be away from the air outlet.

The present invention relates to the field of stud welding technology, specifically a stud welding machine based on the laying of steel truss floor deck, including a cross frame and a stud gun welding machine, the outer surface of the cross frame is provided with a swivel for fixing the stud gun welding machine, the interior of the swivel is slidably connected with a positioning block slidably connected to the cross frame, and one end of the positioning block is fixedly connected to a connecting frame, one end of the connecting frame is fixedly connected to a feeding shell, a batching trough is provided inside the feeding shell, a feeding assembly is provided inside the batching trough, a screw block is slidably connected inside the cross frame, and the bottom of the screw block is slidably connected to the swivel, a driving assembly for driving the screw block to move is provided inside the cross frame, both sides of the cross frame are provided with slide bars for the swivel to slide, and a transmission assembly for driving the slide bar to rotate is provided on the top of the cross frame. Through the design of the feeding assembly, the studs can be automatically pushed from the batching trough into the stud gun welding machine, which greatly reduces the tediousness of manual operation and improves the efficiency of feeding.

The utility model discloses an oiling agent layering device, which belongs to oiling agent layering and comprises a box body and a cover plate, the cover plate is in threaded connection with the box body, a water inlet and an overflow port are respectively arranged on the side walls of the opposite sides of the box body, mounting blocks are uniformly embedded on the inner wall of the box body, clamping grooves are arranged on the side walls of the mounting blocks, spoilers are detachably arranged in the clamping grooves, and the spoilers are arranged in the clamping grooves. And a sealing mechanism matched with the clamping groove is arranged on the spoiler, a cavity is formed in the spoiler, fan blades are rotationally installed in the cavity, and suction pipes communicated with the outside are evenly inserted into the side wall of the cavity. The mounting block and the spoiler are arranged; the spoilers are detachably arranged, so that the number of the spoilers in the box body can be adjusted according to the oil content in the separation liquid, the working efficiency can be improved by reducing the number of the spoilers for the separation liquid with less oil content, and the working efficiency can be improved by reducing the number of the spoilers for the separation liquid with more oil content. The layering effect can be ensured by increasing the number of the spoilers and prolonging the flowing path and time of the separation liquid in the box body.

The utility model discloses a tension system mechanism which comprises a machine frame, a wire cylinder wound with a wire harness, a tension adjusting device, a tension measuring and controlling device and a guiding device, the tension adjusting device comprises a wire winding wheel, and the wire winding wheel is suitable for winding the wire harness on the wire cylinder so as to pull the wire harness and adjust the tension of the wire harness; the tension measurement and control device comprises a measurement and control instrument and at least one measurement and control wheel, the measurement and control instrument is installed on the rack, the measurement and control wheel is installed on the measurement and control instrument, the measurement and control wheel is connected with the measurement and control instrument, and the measurement and control wheel is suitable for detecting the tension of a wire harness; the guide device comprises a mounting seat, a wire guide rod and a wire guide wheel, the mounting seat is rotationally mounted on the rack, the wire guide rod is mounted on the mounting seat, and the wire guide wheel is mounted at the end part of the wire guide rod; the wire harness guiding device can well guide the wire harness, can adjust the tension of the wire harness in the wire harness guiding process, and is high in efficiency.

The utility model discloses a three-way valve, which belongs to the technical field of three-way valves and comprises a valve body, a driving device and a valve clack component. The driving device is connected to the outer side of the valve body; the valve clack assembly is located in the valve body. The valve body is provided with three interfaces; the driving device is connected with the valve clack assembly so as to drive the valve clack assembly to rotate in the valve body and close one connector, and the other two connectors can be communicated. A compensation device is arranged in the valve clack assembly so as to compensate the gap between the valve clack assembly and any connector. The three-way valve can effectively solve the problems that in the prior art, a valve clack is abraded after being used for a long time, so that the sealing performance is affected, cost is too high due to the fact that a magnetic coupling is adopted, the position of the valve clack cannot be visually judged, and the specific medium flow direction cannot be judged.

The invention discloses an LED outdoor lighting intelligent control device, and relates to the technical field of LED outdoor lighting, the LED outdoor lighting intelligent control device comprises a shell, the shell is rotatably connected with a frame body, the top of the shell is fixedly connected with a fixing ring, the outer side of the fixing ring is provided with a plurality of filter holes, the filter holes are uniformly distributed in the outer side of the fixing ring, and the filter holes are communicated with the fixing ring. A heat conducting plate is fixedly connected into the shell, the side edge of the heat conducting plate makes contact with the outer side of the motor, the bottom of the heat conducting plate makes contact with the outer side of the baffle, square grooves are formed in the top and the outer side of the heat conducting plate, limiting rings are fixedly connected into the square grooves, and partition plates are fixedly connected into the square grooves. According to the LED outdoor lighting intelligent control device, the fan is driven by the motor to rotate, a complete air convection channel is formed, flowing air can take away part of temperature on the lighting lamp, and therefore active heat dissipation is effectively conducted on the lighting lamp, the LED lamp is not prone to being heated and damaged, and the service life of the LED lamp is prolonged.

The utility model discloses a multi-way valve which comprises a valve body provided with a valve element cavity and a valve body cavity, a valve element assembly located in the valve element cavity, a first valve cover arranged at one end of the valve body, a driving assembly arranged on the first valve cover and a second valve cover arranged at the other end of the valve body. The valve element assembly comprises a first valve element and a second valve element arranged coaxially with the first valve element. The first valve element comprises a first inner cavity of the first valve element and a second inner cavity of the first valve element. The second valve element comprises a second valve element first inner cavity, a second valve element second inner cavity, a second valve element third inner cavity and a second valve element interval cavity, wherein the second valve element second inner cavity and the second valve element first inner cavity are arranged in a spaced mode, the second valve element third inner cavity is arranged adjacent to the second valve element second inner cavity, and the second valve element interval cavity is located between the second valve element first inner cavity and the second valve element third inner cavity. According to the utility model, at least six working modes can be realized, the flow direction of fluid is changed, the application scene is expanded, parts are reduced, the cost is reduced, and the assembly volume is reduced.

The invention provides an inflation valve which comprises a shell, a one-way valve assembly, a first sealing assembly and a second sealing assembly, the shell is provided with a first channel, a second channel and a third channel which are communicated with a vamp air bag and a shoe sole, and the second channel and the third channel are connected with the two sides of the first channel respectively and upwards penetrate to the top end of the shell; the one-way valve assembly is fixedly arranged between the two ends of the first channel. The first sealing assembly is rotationally connected with the top end of the shell and used for opening or sealing the second channel, and the second sealing assembly is fixedly arranged in the third channel and used for opening or sealing the third channel. The one-way valve assembly is arranged in the first channel to control the gas flow direction, the second channel and the third channel are opened or sealed by adjusting the first sealing assembly and the second sealing assembly according to actual requirements, then the gas flow direction is changed, accordingly, the tightness degree of the vamp is adjusted, the adjusting mode is simple, the sealing performance is high, and the practicability is high. Meanwhile, the elastic effect of the vamp and the user experience are improved.

The invention discloses material engineering experiment environment-friendly dust removal equipment which comprises a fixed base and an air inducing assembly used for introducing air with dust, a cleaning box is fixedly arranged on the top face of the fixed base, a spraying assembly is fixedly installed on the top wall of the cleaning box, a mounting plate is fixedly arranged in the cleaning box, and a dust removal assembly is fixedly installed in the mounting plate. A circulating water assembly is fixedly arranged on one side of the mounting plate, a first filtering frame is in threaded connection with the other side of the mounting plate, a driving assembly with a first cleaning assembly is embedded in a plate body of the mounting plate, a second cleaning assembly is arranged at the position, close to the bottom wall, of the other side of the mounting plate, and a water drainage hole is formed in the bottom wall of the cleaning box. A second filtering frame is slidably connected to one end of the cleaning box, a filtering net is fixedly connected to the top end of a frame body of the second filtering frame through bolts, a handle is fixedly arranged at the end of the second filtering frame, and the device can change the orientation of the induced draft fan, facilitates multi-angle dust falling and improves the dust falling effect and speed.

This invention provides an AUV multi-thrust propulsion system, comprising stabilizers, auxiliary rim thrusters, an AUV stern body, main rim thrusters, fairings, connecting discs, and a tail-mounted connecting frame. The main rim thrusters are fixedly connected to the rear end of the AUV stern body via the connecting discs. The fairings are positioned behind the blades of the main rim thrusters. The four auxiliary rim thrusters are uniformly fixed in a cross shape around the circumference of the AUV stern body. The four stabilizers are arranged in an X-shape on the stern body, staggered and evenly spaced with the four auxiliary rim thrusters. The advantages of this invention are increased maneuverability and controllability while reducing the complexity of the drive mechanism, saving stern space, and increasing the power, maneuverability, and system redundancy of the propulsion system by using multiple rim thrusters, thereby improving the safety, stability, controllability, and mission execution efficiency of the AUV in complex underwater environments.