1757 results about "Backflow" patented technology

The utility model discloses an integrated magnetic flocculation device system and relates to the technical field of water treatment devices. The device comprises a device shell, a central cylinder, a conical mud bucket, a water inlet pipe, a flocculant dosing pipe, a pipeline mixer, a gas inlet pipe for gas stripping, a coagulant aid dosing pipe, a water outlet pipe and a mud discharge pipe, according to the utility model, when water enters, a flocculant is added and mixed on a water inlet pipe by using a pipeline mixer, after water enters the magnetic coagulation area, compressed air is used as a power source for circulation and mixing, a coagulant aid is added above an air release port, supplementary magnetic powder is added to an upper opening of a central cylinder, and water subjected to magnetic coagulation reaction enters the precipitation separation area; when the magnetic coagulation reaction device is used, supernatant is collected by the water collecting tank and then discharged, precipitated sludge containing magnetic powder can slide into the conical sludge bucket to be treated again, redundant sludge is discharged through the sludge discharging pipe, the whole magnetic coagulation reaction and sludge-water separation treatment process is completed in one device, and an independent backflow system is not needed.

The invention discloses an engineering geology grouting reinforcement device, and relates to the field of geology grouting reinforcement, the engineering geology grouting reinforcement device comprises a mounting rack, the mounting rack is fixedly connected with a first telescopic driving part, the output end of the first telescopic driving part is fixedly connected with a mounting plate, and the mounting plate is fixedly connected with a grouting pipe. The grouting pipe is used for pressurizing and grouting, so that the grout enters a reinforcing gap under the action of pressure; after filling is conducted for a period of time, the injection-compression pipe moves downwards, the sealing plate blocks the grouting opening under the action of the spring to prevent grout from flowing back, meanwhile, the injection-compression pipe moves downwards to extrude the grout, the extrusion force is further increased, and geological gaps are filled with the grout more sufficiently. Through the reciprocating operation, the geological reinforcement position can be fully grouted, the stability and strength of the geological structure are effectively enhanced, the quality and reliability of grouting reinforcement are greatly improved, and the reinforcement requirement under the complex geological condition is met.

The invention discloses a novel corrugated paper squeezing device which comprises bearing frames, a conveying belt and a squeezing assembly used for squeezing corrugated paper, the number of the bearing frames is two, the conveying belt is located between the two bearing frames, a fixing frame is arranged at one end of each bearing frame, and a first squeezing roller and a second squeezing roller are arranged in each fixing frame; and the first extrusion roller and the second extrusion roller are symmetrically arranged up and down. The squeezing flannelette outside the conveying belt can reduce tile paper friction, avoid surface scratching and assist in absorbing a small amount of water, the synchronizer controls the electric push rod to stretch out and draw back synchronously and is matched with the guide rod to enable the rotating roller to press the tile paper evenly, local overpressure damage or non-uniform underpressure dehydration is prevented, the water collecting box can collect extruded water, and the valve can drain water in time. Accumulated water is prevented from polluting equipment or flowing back, consumption of follow-up clean water is reduced, residual moisture of the corrugated paper can be further removed through secondary squeezing, moisture residues are greatly reduced, drying power does not need to be additionally increased, and power consumption is reduced.

The utility model discloses a desulfurization device with angle-adjustable guide plates, which relates to the technical field of desulfurization devices, and comprises a desulfurization tower main body, the lower part of the desulfurization tower main body is provided with a smoke inlet, the desulfurization device drives a gear II and a driving rack through a self-cleaning guide mechanism and a starting motor so as to drive a plurality of guide plates to synchronously turn over, so that the guide plates can be synchronously turned over. When cleaning is needed, the first telescopic rod can be started to drive the movable frame to move and drive the scraping plate and the cleaning rod to move in a transmission mode, smoke impurities and dust particles on the flow guide plates are cleaned and scraped, and therefore the cleaning effect is improved. The influence on normal use of equipment due to blockage of a flue gas guide channel between the adjacent guide plates after long-term use is avoided, and the practicability is higher; and through a recovery plate, a telescopic rod II and a push plate, desulfurizer particles screened out from the flue gas can be pushed to a guide pipe and flow back into a desulfurizer pipe for reutilization.

The invention discloses a micro-mixing nozzle integrating heat pipe cooling and heat regeneration and a combustor, the micro-mixing nozzle comprises a heat pipe assembly I, a micro-mixing sleeve, an air mixing module and a fuel pipe, the micro-mixing sleeve, the air mixing module and the fuel pipe are coaxially arranged, and the heat pipe assembly I comprises a heat conduction ring, perforated fins, a heat pipe and heat pipe radiating fins; the overall combustor comprises a fuel cavity, an air cavity and a cooling cavity which are sequentially, coaxially and fixedly arranged at intervals from bottom to top, and a plurality of micro-mixing nozzles which are symmetrically arranged relative to the center of the overall geometric central axis are installed in the air cavity and the cooling cavity. According to the micro-mixing nozzle integrating cooling and backheating of the heat pipe and the combustor, the inlet area of the combustion chamber can be rapidly cooled, the service life of the combustor is prolonged, meanwhile, heat of the inlet area of the combustion chamber can be effectively utilized to preheat air, and the combustion efficiency is improved. The problem that the service life of an existing combustor is short due to thermal damage of a high-temperature backflow area to a micro-mixing nozzle can be solved.

The invention relates to a bent vapor chamber condensation end lifting structure and a gravity backflow enhancing method, and belongs to the technical field of vapor chambers. A condensation section of a vapor chamber is bent upwards relative to an evaporation section to form a height difference, and condensate backflow is enhanced through gravitational potential energy; the structure of the vapor chamber unit is divided into functional zones of an evaporation section and a condensation section, the condensation section is bent upwards to form spatial dislocation, so that the condensation section is higher than the evaporation section in the gravity direction, a natural gravity backflow path is created in working medium circulation, and an inclined surface generated by a bent structure provides a directional flow guide effect for condensate. The liquid working medium can automatically flow to the evaporation section along the surface by virtue of gravity, so that single dependence on capillary force is reduced, the problem of working medium supply interruption caused by insufficient capillary force is effectively avoided, and the problems of insufficient reflux driving force and low working efficiency caused by insufficient reflux driving force due to lack of gravitational potential energy when the vapor chamber is in an approximately horizontal mounting state are solved. The liquid supply of the evaporation section is insufficient; and the heat dissipation efficiency is reduced.

The utility model relates to a mop cleaning device with a bucket, which comprises a cleaning bucket / a mop head / a wiping object, and the cleaning bucket is provided with a clean water area, a cleaning area and a sewage area which are mutually independent; the mop is characterized in that a supporting part for supporting the cleaning area and the outer wall of the sewage area is arranged in the sewage area, a water squeezing part is arranged on the cleaning area, the middle of the clean water area is communicated with the middle of the cleaning area through a water supply channel, the width of the mop head is L1, the maximum width of the water supply channel is L2, L1 is larger than L2, and the mop further comprises a switch used for opening and closing the water supply channel. A linkage part is arranged on the switch; the mop head and the mop rod are jointly inserted into the cleaning area to move up and down; the cleaning area is further provided with a drainage channel used for draining water squeezed and scraped by the wiping object to the sewage area and a backflow channel used for enabling the water to flow back to the cleaning area. In the process of moving down the mop head, the lower end of the wiping object is sleeved or buckled on the back plate of the mop head, so that the lower end of the wiping object cannot be warped under the action of the squeezing and scraping edge of the water squeezing plate, and smooth cleaning operation and no blockage are ensured.

The invention discloses a comprehensive distribution box, the front side of a dehumidifying assembly is provided with a driving assembly used for driving the dehumidifying assembly to rotate, and the front side of the driving assembly is provided with a humidity detection sensor used for detecting the humidity in a distribution box body. The scraping device comprises an adjusting assembly which is arranged in the distribution box body and is used for being connected with the driving assembly. A rod body of the adjusting assembly is in threaded connection with a scraping assembly which is used for scraping condensation of the top cover. Therefore, the motor drives the rotating shaft to rotate, and the bidirectional lead screw is driven to rotate through transmission of the belt pulley I and the belt pulley IV, so that top cover condensation on the scraper blade is effectively removed; meanwhile, transmission of the belt pulley II and the belt pulley III enables the transmission shaft to rotate synchronously to drive the fan to accelerate air circulation in the box and exhaust moisture; through a multi-stage protection mechanism, condensation is prevented from directly dripping to damage an electric appliance, moisture condensation and backflow caused by internal and external temperature difference are inhibited, and equipment faults caused by condensation water seepage coupling are effectively prevented.

The utility model relates to a cleaning tool with a mop bucket, which comprises the cleaning bucket, a mop head and a wiping object, and the cleaning bucket is provided with a clean water area, a cleaning area and a sewage area which are mutually independent; the mop is characterized in that a water squeezing part for squeezing the wiping object is arranged on the cleaning area, the outer side edge of the water squeezing part forms a squeezing and scraping edge, the top end of the water purification area is closed, the water purification area is communicated with the middle of the cleaning area through a water supply channel, the water supply channel is controlled by a switch to be opened and closed, and the water supply channel also serves as an air inlet channel; in the process that the mop head downwards enters the cleaning area, the top face of the water squeezing piece forms a water guide face which is obliquely arranged in the direction of the squeezing and scraping edge, the water guide face blocks a part of water squeezed and scraped from the wiping object and flows back to the wiping object along the water guide face, and a part of water squeezed and scraped from the wiping object crosses over the upper portion of the water squeezing piece and flows into the sewage area. According to the cleaning tool with the mop bucket, it is ensured that water for cleaning and squeezing every time is clean water, and clean water can be automatically and quantitatively provided every time.

The invention relates to the related technical field of valves, and discloses a blow-down valve for sewage treatment, which comprises a valve body, one end of the valve body is fixedly connected with a conveying pipe, the side surface of the valve body is fixedly connected with a blow-down pipe, the other end of the valve body is fixedly connected with a shunt pipe, the middle part of the valve body is provided with a spherical valve core, and the top of the spherical valve core is fixedly connected with a valve rod; a first channel is formed in the side, close to the conveying pipe, of the spherical valve element, a second channel is formed in the side, close to the blow-off pipe, of the spherical valve element, and the side, away from the conveying pipe, of the spherical valve element is used for blocking the flow dividing pipe. In addition, the crushing blades can crush impurities in the dirty liquid in the spherical valve element, the two corresponding tool rests are selectively adjusted to move to the joint of the channel and the pipeline, and therefore the dirty liquid can be discharged smoothly, and the switching and distributing functions of the dirty liquid are achieved. And the crushing blades can be swung to crush blocking impurities at the joint of the channel and the pipeline.

The invention relates to the technical field of cross flow fans, in particular to a dry-type transformer cross flow cooling fan. Comprising a lower shell, an upper shell is arranged at the top of the lower shell, a transverse flow impeller is rotationally installed between the lower shell and the upper shell, air inlets are formed in the front ends of the lower shell and the upper shell, transverse plates are welded to the rear ends of the lower shell and the upper shell, and the two transverse plates are distributed up and down to form an air outlet; an intercepting plate is fixedly connected to the bottom of the inner wall of the upper shell, an air channel is formed in the upper shell, and when airflow passes through the air outlet, part of airflow at the air outlet is intercepted by the intercepting plate, enters the air channel and is exhausted upwards to form an air curtain. By means of the intercepting plate and the air channel, part of air outlet airflow is intercepted to form an air curtain to block hot air backflow, air outlet is concentrated in cooperation with the guide plate of the lower shell, the cooling effect is enhanced, meanwhile, the air inlet opening is increased by means of the adjusting assembly, the air inlet amount is increased, and therefore the problems of hot air circulating suction and low cooling efficiency in the background technology are solved.

The invention belongs to the technical field of spraying, and relates to a coating spraying process and spraying equipment for waterproof cloth. The equipment comprises a storage box, a flow guide plate, a baffle plate, a supporting assembly, a guide roller I, a spraying mechanism, a drying box and a cleaning mechanism. According to the spraying mechanism, continuous suction and spraying of paint are achieved through reciprocating motion of a piston pipe and a piston block, a spray head is obliquely arranged and rotates along with paint pressure, and the spraying range is enlarged; a containing cavity is formed by the guide plate and the baffle plate and is matched with the backflow opening to realize cyclic utilization of the coating; hot air of the drying box is introduced into the fixed base plate through the suction fan and discharged through the air holes to form a protective air curtain, and coating escape is reduced; and the cleaning mechanism drives a knocking strip to periodically shake off redundant paint through a cam. The process comprises the steps of cloth guiding, rotary spraying, air curtain protection, shake-off cleaning and synchronous drying. The problems that existing equipment is uneven in spraying, paint is wasted and the environment is polluted are solved, and the coating uniformity, the paint utilization rate and the production cleanliness are improved.

The invention discloses a transmission and distribution pattern optimization method for a multi-water-source water supply pipe network system, and the method comprises the steps: solving a multi-water-source initial ratio at a hour level, and determining the boundary of a water supply region of each water source as an energy storage regulation and control static frame; minute-level reversible flow-water head scanning is carried out on the high-level water tank and the two-way pump station to generate a virtual pressurizing unit, reverse matching is carried out to form an energy storage dispatching pre-instruction, and the pre-instruction is locked as an executable instruction after returning to a static frame to verify water source reverse flow, water hammer overpressure and negative pressure pollution; a valve opening and closing sequence and a pump station rotating speed are coded into time-state vectors, the time-state vectors are input into a graph convolutional network transient pressure surrogate model to deduce a pressure envelope in the third hundred seconds in a rolling mode, only when the whole process is in a pipe allowable interval, the pressure envelope is issued to the site, and closed-loop collaborative optimization of the hour-level water source ratio and the minute-level energy storage scheduling is achieved. According to the method, the problems of complex calculation and control in multi-water-source, multi-energy-storage and multi-time-scale coupling are solved.

The invention discloses a waste treatment device for ecological board production, and particularly relates to the technical field of waste treatment, the waste treatment device comprises a shell, dust discharge circulation structures are arranged on the upper portion and the left portion of an inner cavity of the shell, and a waste crushing structure for crushing ecological waste is arranged in the middle of the inner cavity of the shell; a waste screening structure for screening materials is arranged in the middle of an inner cavity of the shell, and the dust discharging circulation structure is located at the tail end of the waste screening structure and used for conveying the materials which are not thoroughly smashed back into the waste smashing structure. Efficient crushing is achieved through the crushing barrel and the flywheel assembly, waste adhesion is prevented through a scraper, unqualified waste is secondarily crushed through a communicating groove and a second grating, screen holes are prevented from being blocked through a knocking assembly and a rolling brush, dust is prevented from being diffused through an isolation plate, and dust and uncrushed materials are recycled through an L-shaped air flue and sent back to the crushing barrel for secondary treatment. The dust collecting chamber collects dust, the one-way turning plate prevents backflow, it is guaranteed that treatment is accurate and efficient, resource waste and secondary pollution are reduced, and the equipment stability and the screening efficiency are improved.

The invention provides a device and a method for purifying culture circulating water in a higher-place pond, and the method specifically comprises the following steps: the culture circulating water and residual feed and excrement in the higher-place pond flow out from a sewage draining exit at the center of the pond bottom, and gradually flow into a self-settling filter well through a water inlet at the bottom of the well; aquaculture circulating water is filtered by an immersion filtering device in the well and overflows out of the well, and residual feed and excrement settle to the bottom of the well and then are discharged through a shrimp shell excrement drain outlet; the breeding circulating water overflowing out of the well flows through a hypochlorous acid oxidation device to be disinfected; the culture circulating water treated by the hypochlorous acid oxidation device flows into an aeration dechlorination tank to remove harmful gas; the culture circulating water treated by the aeration dechlorination tank flows into the ecological tank, so that the contents of carbon, nitrogen, phosphorus and the like in the water are reduced; and the culture circulating water treated by the ecological pond is pumped into the higher-place pond through a reflux pump. The system is efficient, energy-saving, small in occupied area, high in automation degree and capable of improving the water quality management efficiency and stability of higher-place pond culture circulating water.

The utility model discloses a multifunctional deep sea environment simulation system, and relates to the technical field of deep sea engineering experiment devices. Comprising a wave flow experiment water tank which is a containing cavity capable of bearing water, and the top of the water tank is of an open structure; a deepwater experiment area, a transition experiment area and a shallow water experiment area are sequentially arranged in the water tank according to the wind direction; the fan array is used for providing a wind field with a preset condition required by an experiment above the water body; the flow guide array is used for guiding and controlling air generated by the fan array; the current generation array is used for generating current and completing circulation of the water body in the wave current experiment water tank through a backflow channel; the wave making array is used for generating waves with different periods and wave heights for the water body; and the wave absorbing plate is used for dissipating energy of the generated waves. According to the system, multi-factor combined action experiment simulation can be synchronously carried out, and the design precision is remarkably improved; the wind wave coupling effect on the structure is achieved, and the real sea wind wave environment is simulated.

The invention discloses a retreating type segmented sleeve valve pipe grouting process for karst treatment, and belongs to the technical field of karst stratum reinforcement. The process comprises the steps of drilling construction, device arrangement, grouting positioning, segmented grouting, retreating type displacement grouting and ending treatment, and is characterized in that a grouting core pipe adopts a sealing telescopic connecting structure of an inner core pipe and an outer sleeve, and is matched with a telescopic driving piece, an elastic connecting piece and a first pressure sensor; dynamic adjustment of the size of a grouting space and real-time monitoring of pressure are achieved, and the risk of excessive or insufficient grouting is avoided in an intermittent grouting mode; the vent pipe and the one-way valve are staggered, pressure in the pipe is balanced, the one-way valve is assisted to rapidly retract, and backflow and slurry mixing are avoided; and the optional rotating device and the stirring piece cooperate to prevent slurry deposition, so that the grouting uniformity is improved. The grouting precision and controllability are remarkably improved, safety and stability of construction are comprehensively guaranteed, the grouting filling compactness and long-term stability are optimized, and the method is suitable for layering of karst caves in different forms.

The utility model discloses an atomization humidifier, which comprises a water tank, a humidifier body, a humidifier body and a control device, and the water tank is used for containing water for atomization; the atomization assembly comprises a main body part, a mounting part, an atomization water tank, an atomizer and a water pump, the main body part is connected with the water tank, the mounting part is located in the water tank and communicated with the water tank, the atomization water tank is connected with the mounting part and located at the top of the mounting part, and the atomizer is connected to the bottom of the atomization water tank; the water pump is connected with the mounting part, the water pump is located at the bottom of the mounting part, the water pump can convey water in the water tank into the atomization water tank, the atomization water tank is provided with an overflow hole, and the overflow hole can enable the water in the atomization water tank to flow back into the water tank so that the water level in the atomization water tank does not exceed the working water level. The atomizing water tank is arranged at the top of the mounting part, and the water pump pumps water in the water tank from the bottom into the atomizing water tank, so that the problem of low atomizing efficiency caused by overlarge depth of the water tank is solved, the capacity of the water tank is increased, and the water adding frequency is reduced.

The utility model provides a pond backflow cleaning and floating device, and belongs to the technical field of treatment of suspended impurities in wastewater. Comprising a mounting frame, a box body, a collecting basket, a sewage pump, a medicament tank and a monitor, an adjusting bolt is arranged at the top of the mounting frame, and the box body is movably mounted on the mounting frame through the adjusting bolt; a water inlet allowing water to flow in is formed in one side of the box body, the collecting basket is installed in the box body, and filtering holes are formed in the collecting basket; the sewage pump is positioned in the box body and is opposite to the water inlet so as to guide water flow into the box body and the collecting basket; the medicament tank is positioned in the box body and is used for performing medicament adding treatment on the water flow entering the box body and the collecting basket; a monitor is arranged on the mounting frame and transmits the detected water flow condition to a remote control unit in a signal form, and the remote control unit controls the operation states of the sewage pump and the medicament tank according to the detected water flow condition.

The utility model discloses a one-way backflow prevention structure water pump for a double-furnace automatic water feeding tea tray, which comprises a water pump main body, a water pump cover is arranged at the upper part of the water pump main body, the water pump cover is fixedly connected with the water pump main body through a fastener, and a water outlet nozzle and a water inlet nozzle are respectively arranged on the surface of the water pump cover. A check valve element is connected in the water outlet nozzle, and a water outlet prevention valve element is connected in the water inlet nozzle. According to the double-furnace automatic water feeding tea tray, when two or more water pumps share the same water inlet and outlet pipeline, a certain specific function water supply mode of the tea tray cannot be achieved due to the reverse water flow problem, water inlet one-way control over the water pumps of the one-way backflow preventing structure is achieved through the water outlet preventing valve element, and the influence of starting of other pumps on a static pump is reduced; high-temperature water or steam backflow is effectively avoided through the check valve element, the water pump is protected against damage, under the condition that a water pump system uses high-temperature water or steam, the possibility that the water pump is damaged due to temperature overrun is reduced, and the service life is prolonged.

The invention relates to a micro-channel heat exchanger with a flow stabilizing structure and a working method, and belongs to the technical field of heat exchangers. The device comprises a cover plate, a box body and splitter plates, a water inlet and a water outlet are formed in the cover plate, the splitter plates are arranged in the box body at intervals, a micro-channel is formed between every two adjacent splitter plates, a converging-in cavity and a converging-out cavity are formed in the box body, progressive flow stabilizing structures are symmetrically arranged on the inner wall faces of the two sides of each micro-channel, and each progressive flow stabilizing structure comprises a base body and a plurality of protruding parts. The base body is provided with a bottom face attached to the splitter plate, the multiple protruding parts are arranged at intervals in the length direction of the base body, each protruding part is provided with a slope contour and a top arc contour, and the slope contours are lifted to the top arc contours in the direction from the afflux cavity to the afflux cavity. According to the invention, coolant backflow can be prevented, pressure fluctuation can be reduced, the working stability of the radiator can be improved, eddy current can be avoided to the greatest extent, the bubble blocking phenomenon can be reduced, and the wall surface drying phenomenon can be delayed.

The invention relates to the technical field of well lids, in particular to an automatic dredging type anti-blocking well lid which comprises a base, a well lid body and the like. A well cover is mounted on the base; and a plurality of water outlets are formed in the well lid. The collecting box is matched with the base in the water level rising process to block a sewer, so that sewage is prevented from overflowing from the water outlet, water accumulation on the road surface is avoided, and the function of preventing sewage from flowing backwards is achieved; a sliding plate moves downwards, so that a magnet adsorbs a metal block to be stopped on a sliding path of a sliding rod, sewage can be discharged to the outside through a water outlet, the sewage is prevented from being continuously accumulated below the well lid to cause relatively large extrusion force, and a sewer backflow phenomenon caused by heavy rainfall is prevented in advance; and the water outlet is cleaned in a reciprocating mode through cooperation of the inserting rod and the collecting box, the water outlet can be simply cleaned in a reciprocating mode without an additional active driving mode, and the self-cleaning function of the well lid is achieved.

The utility model discloses a high-sealing low-error anti-slip water meter which comprises a detection mechanism, first flanges are fixedly connected to the two sides of the detection mechanism, and second flanges are arranged on the sides, away from the detection mechanism, of the first flanges. The water meter is excellent in measurement error and anti-idling effect, the anti-backflow pipes on the left side and the right side of the water meter can effectively prevent water flow from flowing back, when the water flow flows forwards, water pressure pushes the rubber pad and the supporting disc to enable the water flow to pass through gaps, if the water flow flows back, the water pressure enables the rubber pad and the fixing ring to be attached more tightly, backflow is prevented, and the water meter is convenient to use. And the metering error caused by idling is reduced. In the aspect of sealing performance, the adjacent sides of the first flange and the second flange are provided with the annular grooves, the sealing rings are arranged in the annular grooves, the protruding parts of the sealing rings are inserted into the annular grooves, the contact area is greatly increased, the occurrence probability of leakage channels is reduced, the sealing performance is greatly improved, and the device has the advantages of being small in measurement error, good in anti-idling effect and good in sealing performance.

The utility model belongs to the technical field of sewage treatment, and particularly relates to a coagulating sedimentation circulating device for sewage treatment, which comprises a stirring tank, a sedimentation tank is arranged on one side of the stirring tank, a water outlet pipe is connected in the sedimentation tank, a dosing pipe is arranged in the stirring tank, a sewage inlet pipe is arranged in the stirring tank, and a sludge outlet pipe is connected in the sedimentation tank. A sludge return pipe is fixedly connected to the sludge outlet pipe, a first electromagnetic flowmeter, a control valve and a separation box are sequentially assembled on the side wall of the sludge return pipe, and a second electromagnetic flowmeter is assembled on the sludge inlet pipe; a partition plate is fixedly connected to the inner wall of the separation box, an annular plate is rotationally connected to the top face of the separation box, and the annular plate penetrates through the separation box. A small amount of settled sludge can be discharged into the separation box, and the sludge is divided into large-granule sludge and small-granule sludge, so that the large-granule sludge and the small-granule sludge can be conveniently selected and used according to sewage treatment requirements, and impurities in sewage are assisted to settle.

The invention discloses a gravity loop heat pipe based on a vein type flow channel and a radiator. The gravity loop heat pipe based on the vein type flow channel comprises an evaporation assembly, an installation support, a condensation assembly, a medium injection opening communicated with the evaporation assembly, an input copper pipe and a backflow copper pipe. A medium is input into the evaporation assembly through the medium injection port, forms steam after absorbing heat, flows into the condensation assembly through the input copper pipe, and flows back to the evaporation assembly through the backflow copper pipe after completing heat exchange in the condensation assembly. By means of the vein vapor chamber, the condensation efficiency is remarkably improved, the size of the condensation assembly is reduced, the working medium backflow path is prolonged, and more sufficient heat exchange is achieved. The external water cooling structure improves the heat dissipation efficiency, is not limited by the interior of the case, and is flexible to install. In addition, due to different structural designs of the gas pipeline and the liquid pipeline, the problems of backflow in advance and drying of a working medium in the evaporation box body are effectively avoided, and the operation efficiency and reliability of the heat pipe are integrally improved.

The invention belongs to fire fighting, particularly relates to the technical field of fire fighting equipment, and discloses a fire fighting hose reel which comprises a fire fighting reel body, a mounting frame is mounted on the fire fighting reel body, a circulation part is arranged on the mounting frame and comprises a case, the case is mounted on the mounting frame, a first piston cylinder is mounted in the case, and a second piston cylinder is mounted in the first piston cylinder. The middle of the first piston cylinder integrally communicates with a water inlet, one end of the first piston cylinder communicates with a water receiving pipe, a restraining part is arranged on the circulation part, forward water hammer restraining is adopted, the restraining part attenuates the instantaneous speed and pressure of water flow through kinetic energy conversion and gas buffering, the hose is prevented from being straightened and swung due to instantaneous high pressure, and the water flow is prevented from being damaged. By means of reverse water hammer digestion, inert gas backflow of the compensation portion and pressure compensation, reverse impact generated by sudden stopping of water flow is counteracted, fatigue cracking of a hose connector due to repeated impact is avoided, and secondary risks of high-pressure water flow jetting are reduced.

The utility model relates to the technical field of ice-making machines, in particular to an ice-making machine with a cold water backflow assembly, which comprises a machine shell, the machine shell is provided with a machine shell inner cavity, an ice-making module, a water tank positioned on the lower side of the machine shell inner cavity and the cold water backflow assembly positioned between the ice-making module and the water tank, the ice making module comprises an ice discharging assembly for discharging ice blocks, and the ice discharging assembly is provided with an ice discharging outlet, an ice discharging channel partially or completely stretching out of the outer side of an inner cavity of the machine shell, and a water discharging opening located in the ice discharging channel. The cold water backflow assembly is provided with a first collecting end located between the water outlet and the inner cavity of the machine shell and a first discharging end communicating with the inner cavity of the machine shell and the water tank. Melting water is collected and flows back into the water tank and can be reused by the ice maker, waste of water resources is reduced, a user does not need to frequently and manually empty accumulated water, and therefore the cleaning and maintaining frequency is reduced.

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 relates to the technical field of low-temperature check valves, and discloses a low-temperature check valve for preventing media from flowing back in an industrial pipeline, which comprises a valve body, a connector is fixedly communicated with the top end of the valve body, an internal thread is arranged inside the connector, a water inlet pipe is fixedly communicated with the bottom end of the valve body, and a water outlet pipe is arranged at the bottom end of the valve body. An external thread is arranged on the outer wall of the water inlet pipe, and an annular groove is formed in the center of the interior of the valve body. According to the low-temperature check valve for preventing the medium from flowing back for the industrial pipeline, through the arrangement of the anti-reverse structure, when the medium enters through the bottom end of the anti-reverse pipe and then flows out through the water outlet hole formed in the middle of the anti-reverse pipe, the linear passing state of liquid in the check valve can be avoided, and the medium can be prevented from flowing back; and meanwhile, through the arrangement of the sealing assembly, the anti-reverse pipe, the outer wall of the conical cover and the water outlet hole can be sealed, so that the medium cannot pass through in a reverse flow mode, the phenomenon that the medium in the valve body flows back is prevented, and the non-return effect of the check valve is improved.

1. The name of the design product: total program range hood check valve (3). 2. The use of the design product: prevent oil smoke backflow to protect kitchen air hygiene. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: front view.