142results about How to "Inhibit reflux" patented technology

The invention provides a swing vibrator type piezoelectric micropump and a driving and manufacturing method thereof. The piezoelectric micropump comprises a supporting structure, a first through-flow layer, a second through-flow layer and an actuator, wherein the first through-flow layer and the second through-flow layer are arranged at the two ends of the supporting structure, and the actuator is arranged in the supporting structure. The actuator comprises two actuating units which are arranged in parallel. The actuation unit includes a substrate and a vibration element. The vibration element is fixed on the substrate; the two actuating units are of the parallel and opposite cantilever structures on the opposite sides, center stress similar to that of a conventional annular actuator structure cannot be generated in the swing gas pumping process of the two actuating units, and the service life of the piezoelectric micropump can be prolonged. Meanwhile, when different excitation signals are input into the two actuating units, the two actuating units can generate asynchronous vibration, so that reverse airflow with certain continuity is generated in the piezoelectric micropump, the effect of regularly self-cleaning the air inlet is achieved, and long-time continuous work of the piezoelectric micropump in a complex environment is achieved.

The invention discloses an automatic exchange type dustproof filtering distribution box, and relates to the technical field of distribution box dust prevention, and the distribution box comprises a distribution box body, the distribution box body is rotatably connected with a box door, and the distribution box body is provided with fans symmetrically distributed along the distribution box body. Filter covers symmetrically distributed along the distribution box body are mounted on the distribution box body, a filter plate is arranged on one side, close to the interior of the distribution box body, of each filter cover, and a collection bag is inserted into the bottom of each filter cover. According to the timer, the control module controls the fans on the left side and the right side to start for one hour in turn, so that gas is filtered from the filter plate on one side and enters the distribution box body, and the filtered gas blows dust left on the filter plate on the other side in the last turn into the filter cover on the side and finally blows the dust into the collection bag on the side, so that the efficiency is improved. According to the device, during continuous exchange type ventilation, dust can be alternately filtered, and dust remaining and accumulated at the ventilation opening can be cleaned and collected.

The invention relates to the technical field of dust separation, in particular to a convenient-to-clean bag-type dust collector for metallurgical casting. The bag-type dust collector convenient to clean for metallurgical casting comprises a bottom frame, an outer frame, a dust falling hopper, a dust discharging pipe, an air inlet pipe, an air outlet pipe, a supporting plate and a cloth bag, the top of the bottom frame is connected with the outer frame, the bottom of the outer frame is connected and communicated with the dust falling hopper, and the bottom of the dust falling hopper is connected and communicated with the dust discharging pipe. The left side of the lower portion of the outer frame communicates with an air inlet pipe. The first electric sliding rail drives the spraying pipe and the spraying head to move downwards and stretch into the cloth bag, it is guaranteed that compressed air can evenly cover the inner surface of the whole cloth bag, especially the lower area of the cloth bag, the problem of dust cleaning dead angles in a traditional dust cleaning mode is solved, and the dust cleaning effect is remarkably improved; due to the fact that the nozzle blows in the cloth bag, airflow cannot directly impact the surface of the cloth bag, physical abrasion of the cloth bag is reduced, and the service life of the cloth bag is prolonged.

The invention belongs to the technical field of medical equipment, and particularly relates to a mask type vomit collecting device for the emergency department, the mask type vomit collecting device comprises a mask body, a mouth biting device is arranged on the inner side of the mask body, the mouth biting device comprises an arc-shaped flaring part and a circular tube part, an upper tooth groove and a lower tooth groove which are concave inwards are formed in the arc-shaped flaring part, and the circular tube part is communicated with the arc-shaped flaring part; the round pipe part is provided with a hard pipe section and a corrugated pipe section; the end, away from the arc-shaped flaring part, of the round pipe part is connected with a spitting pipe which penetrates through the mask body, the end, away from the mouth biting device, of the spitting pipe is connected with a conveying hose, and the end, away from the spitting pipe, of the conveying hose is connected with a collecting box. An elastic ring body is arranged on the edge of the mask body, two fixing bands are fixedly connected to the mask body, and the ends, away from the mask body, of the two fixing bands are detachably connected. By means of the device, vomitus of a patient can be conveyed into the collecting box in a closed mode, the vomitus cannot be exposed, and therefore people are prevented from feeling uncomfortable, and the vomitus pollution problem and the people infection problem are avoided.

The invention provides a multistage depressed collector for an ultra wide band traveling wave tube. The multistage depressed collector comprises an insulating porcelain cylinder with an inner cavity, an inner collector accommodated and fixed in the inner cavity of the insulating porcelain cylinder, and an outer collector fixedly arranged on the outer wall of the insulating porcelain cylinder, the inner collector comprises a preceding-stage collector and a final-stage collector which are arranged along the axial direction of the insulating porcelain cylinder; the preceding-stage collector comprises a top wall part, a through hole for an electron beam to pass through is formed in the top wall part, and the surface of one side, facing the last-stage collector, of the top wall part comprises a protruding structure protruding towards the last-stage collector. The collector can effectively restrain reflection of secondary electrons, reduce the electron backflow rate, achieve high recovery efficiency and improve the efficiency of the ultra-wideband traveling wave tube.

The utility model provides a valve clamping device and a clamping system, the valve clamping device comprises a clamping component used for clamping a valve leaflet and a plugging piece matched with the clamping component and used for plugging, the clamping component comprises a pair of clamping assemblies capable of being opened or closed, the plugging piece can deform and self-expand, and the clamping component is used for clamping the valve leaflet. The plugging piece comprises a main plugging part and a side plugging part connected to the side portion of the main plugging part, the pair of clamping assemblies are oppositely located on the outer side of the main plugging part and can be opened or closed relative to the main plugging part, and the self-expanded main plugging part can be matched with the clamping assemblies to form a first plugging area when the clamping assemblies are closed. The self-expanded side plugging part extends in the width direction of the clamping component and can be filled in the ventage located on the adjacent side of the first plugging area to form a second plugging area when the clamping component is closed. The utility model aims at providing the valve clamping device and the clamping system to at least improve the anti-reflux effect at the junction of the valve leaflets.

The invention relates to a solid hydrogen storage system cooperating with a fuel cell to quickly respond, which comprises a solid hydrogen storage device, a vortex tube and a fuel cell, the vortex tube comprises a vortex tube hydrogen inlet, a vortex tube cold end and a vortex tube hot end, the vortex tube hydrogen inlet is connected with the outlet of the solid hydrogen storage device, and the vortex tube cold end is connected with the outlet of the solid hydrogen storage device. The cold end of the vortex tube is respectively communicated with an inlet of the solid hydrogen storage device and an inlet of the fuel cell through a cold end reversing valve; the hot end of the vortex tube is respectively communicated with an inlet of the solid hydrogen storage device and an inlet of the fuel cell through a hot end reversing valve; the vortex tube is used for compressing the hydrogen to heat or cool the hydrogen, the hydrogen enters the hydrogen storage device to be heated or cooled, convection is more sufficient and direct from the heat exchange angle, and therefore the problems that the heat exchange efficiency is insufficient, contact heat resistance exists on the surface, and heat exchange is limited by the heat conduction efficiency of the bottle body can be solved; and the response time of the hydrogen storage alloy can be greatly shortened.

The invention discloses a polymerization reaction kettle for polyimide preparation, and relates to the technical field of polyimide preparation. The reaction kettle comprises a reaction kettle body, a rack is mounted in the center of the top of the reaction kettle body, a motor is mounted on the rack, the output end of the motor penetrates through the rack, extends into the reaction kettle body and is fixedly connected with a rotating shaft, stirring blades are fixedly connected to the outer surface of the rotating shaft, and a lower auxiliary material pipe is mounted at the bottom end of the rotating shaft. The flow guide groove is formed in the rotating shaft, and the sealing assembly is mounted at the bottom of the rotating shaft, so that one end of the auxiliary material feeding pipe is always positioned in the flow guide groove and is kept in a fixed state in the concentrated rotating process, and auxiliary materials are conveniently added into a solvent at the central position in the reaction kettle body and are diffused to the periphery; and auxiliary materials are fed from the periphery of the reaction kettle body by utilizing a plurality of upper auxiliary material pipes and are diffused to the center, so that the diffusion uniformity of the auxiliary materials is improved, and the reaction rate is further improved.

The invention provides a cleaning machine water gun handle and a cleaning machine. The cleaning machine handle comprises a shell (100), a liquid outlet pipeline (200) and an inlet valve (300), one end of the inlet valve (300) is used for being connected to a water inlet pipe, and the other end of the inlet valve (300) is connected to the liquid outlet pipeline (200). The cleaning machine handle further comprises a liquid suction valve (400), a liquid suction pipe (540) and a check valve (600), one end of the liquid suction valve (400) is connected to the liquid suction pipe (540), the other end of the liquid suction valve (400) is connected to the check valve (600), the check valve (600) is connected to the liquid outlet pipeline (200), and the connecting position of the check valve (600) and the liquid outlet pipeline (200) is located in the shell (100).

The present invention discloses a wind-conducting oil-immersed transformer with double heat dissipation, and relates to the technical field of heat dissipation of oil-immersed transformers. The wind-conducting oil-immersed transformer with double heat dissipation comprises: a base, a transformer box, a copper tube heat dissipation mechanism, a fin heat dissipation mechanism, a fan mechanism, an air guide plate and a temperature sensing control mechanism; the copper tube heat dissipation mechanism is composed of a plurality of long copper tubes and a plurality of short copper tubes, which are welded on both sides of the transformer box; the fin heat dissipation mechanism is penetrated by the long copper tube, and the heat dissipation fins are arranged equidistantly on the outside of the transformer box, and each heat dissipation fin is installed with a semiconductor cooling fin on the left side and an air guide plate on the lower end of the right side; the fan mechanism is installed directly above the fin heat dissipation mechanism, and the operating state of the fan mechanism is controlled by the temperature sensing control mechanism. The transformer provided by the present invention effectively reduces the backflow of heat flow, and has the advantages of high heat dissipation efficiency and low heat loss.

The invention discloses a valveless piezoelectric pump simulating a Crassica muscosa blade structure and a control method of the valveless piezoelectric pump, particularly relates to the technical field of fluid machinery, and solves the technical problems of low pump flow, low output pressure and backflow of a valveless piezoelectric pump in the prior art. According to the technical scheme, a row of imitated Crassica muscosa blade structures are placed between an inlet flow channel and an outlet flow channel to form forward and reverse flow resistance difference, one-way flow is formed, and the function of the pump is achieved; in addition, the imitated Crassica muscisa blade structure provided by the invention can promote the forward flow of the liquid and hinder the reverse flow of the liquid, so that the backflow phenomenon of the liquid is inhibited, and the flow of the valveless piezoelectric pump is increased.

The invention relates to a finger-pressing type nucleic acid detection micro-fluidic chip, which comprises a bottom layer, a flow channel layer, a finger-pressing layer and a thin film layer, the flow channel layer comprises an LAMP reaction chamber, a CRISPR reaction chamber, a water storage chamber, a Tesla valve, a finger-pressing chamber and a test paper reaction chamber, the LAMP reaction chamber comprises a nucleic acid extraction-free reaction system based on LAMP, the CRISPR reaction chamber comprises a CRISPR-based cas12b reaction system, and the test paper reaction chamber comprises a Tesla valve, a finger-pressing chamber and a test paper reaction system. The water storage chamber is mainly used for diluting a mixed system, and the Tesla valve is used for preventing crosstalk of the two reaction systems; the finger pressing layer comprises an LAMP reaction chamber button and a CRISPR reaction chamber button, when the LAMP reaction chamber button is pressed, liquid in the LAMP reaction chamber is pumped into the CRISPR reaction chamber, when the two buttons are pressed at the same time, a reaction mixing system is pumped into the water storage chamber to be mixed, and then the reaction mixing system is further pumped into the test paper reaction chamber. The chip can be widely applied to the field of rapid diagnosis of nucleic acid molecules, the detection cost is reduced, manual operation is simplified, and the detection efficiency is improved.

The present invention provides an instantaneous sterilization device for edible fungus cultivation substrate. The instantaneous sterilization device includes a flow channel and a screw, wherein the screw is inserted into the flow channel; spiral blades and extrusion pieces are arranged on the outer periphery of the screw, wherein the spiral blades are arranged in sections, and the extrusion piece is arranged between adjacent spiral blades and close to the outlet of the flow channel; the flow area at the extrusion piece is smaller than the flow area at the spiral blade. The present invention adds an extrusion piece to the screw with spiral blades, and the extrusion piece is arranged between the segmented spiral blades to extrude the material in the flow channel without causing blockage, explosion, etc. At the same time, it also provides a larger friction resistance to generate heat when the material passes through, thereby ensuring the generation of the required high temperature and high pressure.

The invention discloses a double-jet powder feeding device, which belongs to the technical field of water treatment, and comprises a gas-liquid separation buffer tank for performing gas-liquid separation on mixed slurry, and an exhaust port is formed in the gas-liquid separation buffer tank; the first jet mixing mechanism is used for preliminarily mixing powder and the first water flow; the water supply mechanism is used for mixing water; one end of the second mixing piece is connected with a water outlet of the gas-liquid separation buffer tank; the first jet mixing mechanism comprises a first mixing piece connected with the gas-liquid separation buffer tank at one end and a feeding assembly used for feeding powder to the first mixing piece, and the other end of the first mixing piece and the other end of the second mixing piece are both connected with a water outlet of the water supply mechanism; and the second mixing piece can be used for secondarily mixing the buffered and separated liquid-solid mixed liquid and the second water flow and pressurizing and throwing out the liquid-solid mixed liquid and the second water flow. The device has the effects of effectively solving gas interference, preventing blockage and reflux, and realizing stable, efficient and continuous feeding.

The utility model discloses a stainless steel water tank which comprises a water tank main body, and first ribbing steps used for placing shelf kitchen ware are arranged below the front side wall and the rear side wall of the water tank main body; the shelf chopping board can be transversely placed on the first ribbing step in a sliding manner; the bottom of the water tank main body is inclined towards one transverse side, and the side is provided with a dirt collecting groove which is sunken downwards; the sewage collecting groove is provided with a water outlet; when the shelf chopping board moves towards one side of the dirt collecting groove, the shelf chopping board can completely shield the upper part of the dirt collecting groove; when the shelf chopping board groove moves away from one side of the dirt collecting groove, the shelf chopping board, the bottom of the water tank main body and the dirt collecting groove can form a three-layer stepped structure. According to the utility model, the eccentric layout of the water outlet and the dirt collecting groove is combined with the stepped flow guide surface to form a dynamic visual drainage path, and a continuous water film effect is generated when water flows through the hierarchical structure, so that efficient dirt discharge and ornamental value are achieved, and the dual requirements of modern kitchens on practicability and spatial aesthetics are met.

This utility model relates to the field of urine collection bag technology and discloses a urine collection bag for bladder irrigation in urological patients. It includes a lifting arm and a urine collection bag. A hook is fixedly connected to the middle of the upper surface of the lifting arm, and a warning light is installed in the middle of one side of the lifting arm. A power supply is installed inside the lifting arm. Slides are formed on both sides of the lifting arm. A conductive block is fixedly connected to one side of the bottom wall of the slide, and a spring is fixedly connected to the other side of the bottom wall of the slide. An inlet pipe is fixedly connected to one side of the upper surface of the urine collection bag, and a drain pipe is fixedly connected to the middle of the lower surface of the urine collection bag. This urine collection bag for bladder irrigation, through the design of an observation window and built-in scale lines, reduces the interference of bag deformation and light refraction on readings. Nursing staff can intuitively and accurately read the volume of irrigation waste fluid, ensuring accurate recording of intake and output balance, and providing reliable data support for assessing the patient's bladder irrigation effect, bleeding, and renal function recovery.

The utility model discloses a kind of duplex ball valves with non-return function, belong to ball valve technical field, including duplex ball valve body, one end of the duplex ball valve body is equipped with non-return pipe by bolt, the outside of the non-return pipe is provided with protection mechanism, the outside of the non-return pipe is provided with moving groove, the inside of the non-return pipe is provided with expansion tank, the inner chamber of the non-return pipe is provided with rear conical plug, the inner chamber of the moving groove is slidably connected with movable ring. In the utility model, when the inside of non-return pipe flows fluid, fluid pushes conical plug post and the inner wall of rear conical plug separate to make fluid flow, when the inside of non-return pipe does not flow fluid, the elastic force of spring is used to drive conical plug post reset, so that conical plug post is plugged to the inner chamber of non-return pipe, avoid fluid reflux, in addition, spring is supported by first fixed column and second fixed column and is packaged, spring can be replaced, and practicality is good.

The invention discloses an intelligent laryngeal mask for the anesthesiology department, relates to the technical field of the anesthesiology department, and aims to provide the intelligent laryngeal mask for the anesthesiology department, which can lead vomiting liquid out of the esophagus and prevent the vomiting liquid from flowing back into the airway when a patient vomits. The first annular air bag is arranged on the ventilation pipe and is aligned with the inflation pipe, a flow guide pipe is arranged below the ventilation pipe, one end of the flow guide pipe is aligned with the esophagus, and the other end of the flow guide pipe extends out of the oral cavity. Meanwhile, the flow guide pipe located below the breather pipe is aligned with the esophagus, when the patient vomits, vomiting liquid enters the flow guide pipe through the esophagus under the pressure effect and then is discharged out of the oral cavity through the flow guide pipe, and the problem that the vomiting liquid extrudes the breather pipe open and flows back into the air inlet channel is solved.

The invention relates to the technical field of medical instruments, and discloses an enemator for preventing enema reflux, which comprises an enema bag, a catheter and an anal tube, the catheter is connected to the bottom of the enema bag, the bottom end of the catheter is fixedly provided with a cannula assembly, the open end of the anal tube is fixedly provided with a cannula assembly, the cannula assembly is in threaded connection with the cannula assembly, and the cannula assembly is fixedly connected with the anal tube. The bottom end of the anal tube is sealed, drainage holes are formed in the circumferential face of the bottom end of the anal tube in an array penetrating mode, and an anti-backflow assembly is fixedly installed in the upper half portion of the anal tube. The clysis liquid flows from right to left along the square channel, after the clysis liquid is divided by the V-shaped end of the flow guide block, one part of the liquid continues to flow along the square channel, the other part of the liquid penetrates through the U-shaped groove to flow, the flowing direction of the liquid is changed after the liquid passes through the U-shaped groove, convection is generated between the liquid and the liquid in the square channel, and therefore the flowing speed of the liquid in the square channel is slowed down. Therefore, the purpose of preventing the enema liquid from flowing back to the inside of the enemator is achieved.

The utility model relates to the technical field of medical instruments, in particular to an infant anti-backflow urine collection sleeve bag which comprises an infant anti-backflow urine collection sleeve bag body, a urine inlet is oval, a circle of liquid separation area is arranged on the periphery of the urine inlet, polymer liquid separation strips are arranged on the inner ring and the outer ring of the liquid separation area, an adhesive base plate is made of pressure-sensitive adhesive, and air can pass through an air inlet hole. The funnel-shaped polymer is connected with the silica gel hose, the tail end of the silica gel drainage strip is connected with the anti-backflow block, the urine taking opening polymer is arranged at the lower right corner of the polymer urine collecting bag body, the urine taking success rate is increased through the drainage and anti-backflow method, the urine separating strip absorbs urine around the urine inlet, the situation that the urine around the urine inlet wets the viscose, and the viscose falls off is avoided, and the urine collecting bag is convenient to use. The drainage strip, the funnel-shaped polymer film and the silica gel hose play a role in draining urine into the urine collection bag body, and when the urine collection bag is turned over, the anti-backflow block blocks the silica gel hose under the action of gravity, so that the urine is prevented from flowing back to an inlet.

The invention belongs to the technical field of vacuum pumps. The screw vacuum pump solves the problem that in the prior art, the screw vacuum pump is low in pumping speed. The screw vacuum pump with the high pumping rate comprises a pump body and a screw, the screw is provided with a cooling channel with the center line of the screw as the center and arranged in a spiral shape, and the pump body is provided with a liquid inlet cavity and a liquid outlet cavity which are communicated with the two ends of the cooling channel respectively. The liquid inlet chamber and the liquid outlet chamber are connected through a communicating pipe, and a booster pump is arranged on the communicating pipe; two C-shaped floating pressing rings made of wear-resisting self-lubricating materials and a plurality of compression springs arranged in the circumferential direction of the pump body are further arranged on the inner wall of one end of the exhaust port of the pump body, each compression spring is arranged in the radial direction of the corresponding floating pressing ring and connected with the corresponding floating pressing ring, and under the action of the compression springs, the compression springs are arranged in the radial direction of the floating pressing rings. The two floating pressing rings with the openings arranged oppositely abut against threads of the two screw rods respectively. And the air exhaust rate of the screw vacuum pump is effectively improved.

The application discloses a gas-water diversion anti-siphon device, which comprises a water storage tank body, a water inlet pipe joint, a water outlet pressure-limiting backflow valve assembly, a pressure-loss air inlet valve assembly and a pressure-loss water outlet valve assembly. The water inlet pipe joint is arranged at the upper half of the water storage tank body and is connected with a water supply pipe network. The water outlet pressure-limiting backflow valve assembly is arranged at the lower half of the water storage tank body and is connected with downstream water using appliances. The pressure-loss air inlet valve assembly and the pressure-loss water outlet valve assembly are arranged at the top end and the bottom end of the water storage tank body, respectively. When the water supply pipe network is shut down and negative pressure is generated, the pressure-loss air inlet valve assembly is opened to enable air to enter the water storage tank body and flow into the water supply pipe network through the water inlet pipe joint. Meanwhile, the pressure-loss water outlet valve assembly is opened to discharge the accumulated water in the water storage tank body. Meanwhile, the water outlet pressure-limiting backflow valve assembly is closed to prevent downstream water from flowing back into the water storage tank body.

The utility model relates to the technical field of blowdown devices, in particular to a blowdown device for mesotrione synthesis. According to the technical scheme, the sewage discharging device comprises a sewage discharging pipe, a plurality of spiral pieces are welded to one side of the interior of the sewage discharging pipe in an annular array at equal intervals, a plurality of annular blocking pieces are welded to the side, away from the spiral pieces, of the interior of the sewage discharging pipe at equal intervals, and a chemical adding pipe is fixedly connected to the middle of the upper surface of the sewage discharging pipe. According to the sewage treatment device, a treatment agent is added in the process that sewage flows in the sewage discharge pipe, so that the reaction time of subsequent sewage treatment with the agent is saved, and the sewage treatment efficiency is improved.

This invention discloses a metal ion pollution sampling and detection device, specifically relating to the technical field of detection devices. It includes multiple sampling tubes, a sampling pump, sampling bottles, and an anti-backflow bottle. The bottom ends of the sampling pump, sampling bottles, and anti-backflow bottle are flush. The sampling pump is connected to the sampling bottle via the sampling tube, and the sampling bottle is connected to the anti-backflow bottle via the sampling tube. A connecting cavity adapter is fixedly installed at the end of the sampling tube furthest from the sampling pump. The key technical feature is that a check valve is fixedly connected between the sampling tubes. A sliding guide plate is slidably installed inside the check valve, and multiple sets of vertical rods are installed inside the check valve to interlock with the sliding guide plate. When airflow passes through the check valve, it causes the position of the sliding guide plate to change, thereby changing the connection or sealing state inside the check valve, thus achieving the purpose of diversion and preventing gas backflow.

This utility model relates to the field of valve technology, and in particular to a two-way valve and an explosion-proof valve. The two-way valve provided by this utility model includes a housing and a fixed base forming an air exchange channel, and a first movable member and a second movable member. At least a portion of the first movable member passes through the second movable member and extends into the fixed base. The first movable member is axially movable relative to the second movable member and the fixed base. When the first movable member moves in a first direction, the air outlet channel communicates with a first gap. When the first movable member pushes the second movable member to move in a second direction, the air inlet channel communicates with the first gap. The movement of the first movable member within the air exchange channel forms separate air outlet and air inlet channels, precisely controlling the airflow direction, avoiding turbulence and backflow, improving exhaust efficiency, and adapting to airflow pressure requirements in different directions.

The wearable waterproof fixing waistband comprises a fixing waistband body, the outer side of the fixing waistband body is fixedly connected with a mounting belt, the front side of the mounting belt is provided with a storage assembly, the storage assembly comprises a storage bag, and the two ends of the rear side of the storage bag are fixedly connected with connecting belts; the connecting belt penetrates through the mounting belt and then is adjustably connected with the mounting belt through a connecting piece, the upper end of the storage bag is fixedly connected with a feeding pipe used for being connected with a drainage pipe, the front side of the storage bag is provided with a zipper capable of being opened and closed, and the bottom end of the storage bag is fixedly connected with a liquid discharging pipe. Through the arrangement of the storage bag and the internal height adjusting mechanism, the drainage bag is completely stored in the bag, hung through the hook and clamped and fixed through the two sides of the clamping plate, a drainage tube is prevented from being shaken and pulled during movement, the height adjusting mechanism can adjust the height of the drainage bag according to different body positions such as standing, sitting postures and stooping of a patient, and it is ensured that the drainage bag is always lower than a drainage opening; the risk of drainage liquid backflow is avoided.

This utility model discloses a quantitative liquid filling machine for producing electroplated aluminum adhesive, relating to the field of filling machine technology. It includes a tank, which further includes a quantitative mechanism. A sealing cap is threaded onto the top of the tank. The invention utilizes an electric telescopic rod, which moves a push plate to push the liquid flowing into the conveying pipe towards a one-way valve. Due to the one-way valve's inability to allow outflow, the liquid in the conveying pipe flows through the one-way valve into the discharge pipe, achieving quantitative filling. When the push plate moves the adhesive in the conveying pipe towards the discharge pipe, the one-way valve precisely opens, ensuring all material enters the discharge pipe. When the push plate returns to its original position for the next push, the one-way valve automatically closes, preventing backflow of material from the discharge pipe back into the conveying pipe. This avoids instability in the material volume in the conveying pipe due to backflow, ensuring that the amount of material pushed each time is a fixed volume corresponding to the push plate's stroke, fundamentally guaranteeing quantitative filling.

The utility model discloses an intelligent pedestal pan cover plate with a water quality purification component with a backflow prevention function. The water quality purification component comprises a base, a water inlet part and a water outlet part, wherein the base comprises a containing cavity, and the water inlet part and the water outlet part are communicated with the containing cavity; the purification module comprises a purification chamber, and a first water passing path and a second water passing path which are communicated with the purification chamber; the first water passing path is communicated with the water inlet part, and the second water passing path is communicated with the water outlet part; the anti-reflux structure comprises a sealing pressure-bearing piece and a one-way water outlet piece, and the sealing pressure-bearing piece is movably arranged at the connecting position of the first water passing path and the purification chamber and is communicated with the outside; the one-way water outlet piece is arranged on the water outlet part and used for limiting water flow from reversely flowing into the second water passing path. The connecting position of the second water passing path and the water outlet part is lower than the connecting position of the first water passing path and the purification chamber; according to the intelligent toilet cover plate with the water quality purification assembly, the problems that an existing filtering assembly is large in size, cannot be miniaturized, is arranged close to a water outlet unit, is poor in sanitation and is prone to being polluted are solved.

The utility model discloses an arc extinguish chamber structure of a high-voltage circuit breaker, which belongs to the technical field of high-voltage circuit breakers and comprises a static contact seat and a conductive seat, a moving contact is mounted in the conductive seat, a nozzle piece is arranged at the right end of the moving contact, a variable-diameter guide cylinder is mounted in the static contact seat, and a static arc contact extending into the variable-diameter guide cylinder is arranged at the right end of the static contact seat. The variable-diameter guide cylinder is sleeved with an inner cavity of the static contact seat, the outer diameter of the nozzle piece is matched with the small inner diameter of the variable-diameter guide cylinder, the variable-diameter guide cylinder plays a role in auxiliary guiding and backflow prevention for the nozzle piece, the nozzle piece is beneficial to airflow diffusion, and the small-diameter portion of the variable-diameter guide cylinder can effectively prevent airflow backflow. The variable-diameter guide cylinder gives consideration to centering of the arc extinguish chamber and air flow formation in the opening process of the arc extinguish chamber, ensures the breaking capacity, is simple and ingenious in structural design, effectively solves the problems of complex connection structure and low reliability caused by the split type design of the nozzle, and can effectively improve the assembly efficiency.

The application discloses a visual cleaning device for cleaning or medicine feeding of a human cavity such as a vagina or a rectum, which comprises a cleaning device shell, a cleaning assembly, a camera assembly and a flexible expansion assembly; the flexible expansion assembly comprises a plurality of flexible air bags arranged in a circumferential direction on a surface of an insertion end, and each flexible air bag is independently controlled by a control module, so that the flexible air bags are controllably contracted or expanded; on one hand, the flexible air bags in an expanded state are in flexible contact with an organ, so that the use comfort of the cleaning device is improved; on the other hand, the flexible air bags in a contracted state can form an avoiding space to avoid a wound surface; the camera assembly comprises a camera arranged at an end of the insertion end and is used for observing the inside of the cavity in real time. Through the cooperative design of the assemblies, the visual cleaning device realizes the functions of flexible expansion introduction of the cavity, visual accurate operation and selective wound surface avoiding, and mechanical damage to the human body is avoided, and the comfort of a patient is improved.