195results about How to "Achieve clogging" patented technology

The invention relates to the ventilation system field, in particular to an efficient automatic dust-removing and intelligent ventilation system and an automatic dust-removing method. The system comprises an intelligent energy-saving ventilation system housing component and a fan, wherein the intelligent energy-saving ventilation system housing component comprises a dual duct, a dust-discharging duct, a throttle actuating mechanism, a dust screen, a temperature and humidity sensor and a distributed pressure sensor, wherein the temperature and humidity sensor and the distributed pressure sensor are connected with a control system, and the control system drives the throttle actuating mechanism to realize time-sharing and smooth transition of the dual duct and the dust-discharging duct. The beneficial effects of the invention are as follows: the fans of the air feeder unit can be used for several purposes such as air supply and dust removing, thus reducing the equipment cost; the self-cleaning of the filtering screen can be realized, thus prolonging the service life of the filtering screen, reducing replacement frequency and lowering maintenance cost; and by turning on / off the automatic dust-removing and intelligent ventilation system, the normal operation of the devices in an equipment room can be ensured.

The invention relates to an environmental project able to treat sewage, especially to a constructed wetland with a sewage treatment function. According to the technical scheme of the invention, the constructed wetland with a sewage treatment function is characterized by comprising a wetland main body composed of a plant and a filling material. The wetland main body is provided with a heating functional device, an aerobic functional device, a carbon source adding and denitrification functional device, a physicochemical adsorption functional device and a sludge discharge functional device. The carbon source adding and denitrification functional device consists of a hollow filtering cavity and a carbon source substance displaced in the hollow part of the hollow filtering cavity. The physicochemical adsorption functional device includes a hollow filtering cavity and a fine-grained physicochemical adsorption filling material disposed in the hollow part of the hollow filtering cavity. By means of the above scheme, the invention overcomes problems existing in prior art, and provides a novel constructed wetland with a sewage treatment function, wherein, the constructed wetland has the advantages of high removal efficiency, stable operation, and difficult obstruction, etc.

The invention discloses an ultrasonic atomization assisted electrospinning technique and belongs to the field of preparation and applications of nano materials. According to the technique, prepared graphene, graphene oxide, carbon nano tubes and other nanoparticles are dispersed in a storage tank of an ultrasonic atomizer, atomization spraying of the nanoparticles is realized, and the problem of nanoparticle blocking caused with a conventional mixing method is solved. Ultrasonic atomization and electrospinning techniques are combined for use, a prepared nanoparticle polymer composite film has uniformly mixed nanoparticles, and agglomeration is not easily caused. The polymer fiber film prepared with the technique has high separation efficiency, good strength and excellent water resistance, and the physical and chemical properties of the composite film material are improved. Compared with a conventional electrospinning technique, graphene and the carbon nano tubes can be mixed in any ratio, the conventional blocking problem of an electrospinning sprayer is solved, and the technique has important application prospect in environment treatment and electrode material preparation.

The invention discloses a remote pneumatic feeder charging aerator; a conveying pipeline (2) is arranged on an output pipeline (17) of a charging box (1); the conveying pipeline (2) is fixedly connected with the output pipeline (17) of the charging box (1) by a hoop (6); the conveying pipeline (2) is connected with a charging elbow (27) of a pneumatic throwing aerator (3); the conveying pipeline (2) is fixed on a support rod (21) of the pneumatic throwing aerator (3) by a dual connection hoop (5); a wiring terminal (66) in a control box (4) is connected with a throwing motor of the charging box (1) and a motor (19) of the pneumatic throwing aerator (3); the input end of the control box (4) is connected with a three-phase four-wire power grid, so the remote pneumatic feeder charging aerator is integrally formed. The remote pneumatic feeder charging aerator realizes the remote large-size charging and water body aeration, is convenient to mount and use, high in automation level and manpower-saving, and has a far throwing distance, large throwing area, obvious aeration effect and broad market demands, and the labor intensity is reduced.

The invention relates to the field of manufacturing and design of high-voltage switches and discloses an arc extinguish chamber structure for lifting an arc voltage. The structure comprises a fixed piston and a pull rod moving in an inner hole of the piston; a relative position of an air current channel is designed to realize staged blocking and opening; and simultaneously the structure has an extended moving arc contact surface, so that the variation range of an arc length is enlarged. The structure can increase the amplitude and jump of the arc voltage and fulfills the aim of enhancing the breaking direct current, the volume and the sensitive small-current breaking capacity of a circuit breaker.

The invention belongs to a coupling device and a coupling technology for in situ extraction of succinic acid by an expanded bed and fermentation and separation of the succinic acid, in particular relates to a technology for producing the succinic acid by the fermentation method, a technology for separating the succinic acid by the expanded bed and a fermentation and separation coupling process. The device is to couple a chromatography column of the expanded bed and a succinic acid bioreactor, so as to extract the succinic acid in situ. The device utilizes the characteristic of the chromatography column of the expanded bed that microbial zymotic liquid provided with solid materials is allowed to directly enter the chromatography column, avoids the blockage problem of a chromatography column of a fixed bed due to direct coupling of the fixed bed and the bioreactor in the prior art, saves an additional membrane separator between the bioreactor and the chromatography column of the expanded bed, realizes direct coupling of the chromatography column of the expanded bed and the bioreactor, and performs in situ extraction of target substances and does not cause blockage of the chromatography column of the expanded bed. Moreover, a coupling system for in situ extraction of the succinic acid by the expanded bed and the fermentation and the separation of the succinic acid is established to meet the requirements of sterilization and pollution-free operation.

The invention provides an air conditioner and an air conditioner throttling device blockage detection method and system. The air conditioner comprises a compressor, an indoor unit, an indoor unit evaporator and a counter. The detection method comprises the steps of (1) acquiring the state of the compressor after the air conditioner is powered on and started up; (2) judging whether the continuous running time of the compressor reaches the first preset time t1 or not when the compressor is in a running state; (3) if yes, further judging whether the running frequency of the compressor within the first preset time t1 is greater than the preset frequency f1; (3) if yes, acquiring the running current I1 of the air conditioner and / or the air intake temperature T1 of the indoor unit and the temperature T2 of the indoor unit evaporator at the intervals of the second preset time t2; and (4) judging whether a throttling device of the air conditioner is blocked or not according to the running current I1 of the air conditioner and / or the air intake temperature T1 of the indoor unit and the temperature T2 of the indoor unit evaporator. By means of the method, whether the throttling device of the air conditioner is blocked or not can be detected, and the detection method is simple and reliable.

The invention provides a detection device and a detection method for blocking of a fused deposition type 3D printing machine spray head. The detection method comprises the steps that correlation signals with preset time intervals, generated through a first photoelectric correlation sensor and a second photoelectric correlation sensor are sent to a 3D printing machine; if extrusion of an extruder is normal, the spray head is not blocked, fan blades rotate ceaselessly, the photoelectric correlation sensors repeatedly generate the correlation signals with preset time intervals, the correlation signals are sent to the 3D printing machine, and the 3D printing machine performs normal printing; and if the spray head is blocked, the extruder cannot extrude 3D printing supplies, the 3D printing supplies cannot move, a worm cannot be driven to rotate, the fan blades stop rotating, the photoelectric correlation sensors continuously receive signals or cannot receive signals, if the photoelectric correlation sensors continuously receive signals or cannot receive signals after preset time, an alarm is given, the 3D printing machine is temporarily stopped, and the whether the spray head is blocked or not is detected.

The invention discloses a material grinder which comprises a machine casing, wherein a reversed frustum-shaped rotating body and a reversed frustum-shaped filtering support member are arranged in the machine casing, the rotating body is movably connected with the machine casing through a spindle, fixed blades and movable blades are distributed on the circumferential side of the rotating body, satisfactory smashed materials are filtered into a cavity formed by the filtering support member and the machine casing, satisfactory smashed materials and unsatisfactory slag cannot be fed back together, unnecessary work load of devices and staff can be reduced, device resistance is reduced, device efficiency is improved, a whole material down channel is in a gradually narrowed state, the materials performed with certain smashing procedures can still keep certain compactness when moving to a lower gap and the lower materials can be efficiently and fully smashed.

The invention discloses a continuously-circulating screen vibrating sieve. The continuously-circulating screen vibrating sieve is mainly composed of a screen circulation system, a screen excitation system and a screen circulation driving system. The screen circulation system is formed by assembling screen trays, a chain and chain wheels. The screen trays are hinged together through connecting shafts. The screen excitation system is composed of funnels, excitation motors and supporting springs, wherein the funnels are provided with groove-shaped tracks. The funnels are arranged below the circulating screen trays on the screen circulation system. Rollers supporting the circulating screen trays roll in the groove-shaped tracks. The screen circulation driving system is composed of a chain transmission motor and a speed reducer. The chain transmission motor transmits power to the driving chain wheel through the speed reducer, and the driving chain wheel drives the whole screen circulation system to move. The continuously-circulating screen vibrating sieve is simple in structure and convenient to manufacture; the screen can circulate continuously, the self-cleaning capacity is high, and the defects that the self-cleaning capacity of an existing drilling fluid vibrating screen is poor, screen blocking and screen burning are likely to occur, and the solid-phase liquid content after separation is high can be effectively overcome.

The invention discloses a washing machine self-cleaning circulating filtering system and a self-cleaning method. The system comprises a water storage tank communicated with a washing machine, a filter module disposed in the water storage tank and processing water and a siphon pipeline communicated with the water storage tank, wherein the internal space of the water storage tank is divided into two cavities; the two cavities are communicated via the filter module; the two cavities are a first cavity to filter drainage water in a washing machine water accommodating barrel, and a second cavity discharging the filtered water to the water accommodating barrel; one end of the siphon pipeline is communicated with the first cavity and the other end lifts, then passes through a washing machine body and then descends; a highest point of the siphon pipeline is higher than a height between a water outlet position of the water storage tank and a circulating water inlet position of the water accommodating barrel; when the filter module is blocked, large absorption force is formed in the siphon pipeline due to the siphon principle, so block can be automatically cleaned and back wash can be formed; after cleaning is finished, the siphon is automatically destroyed and circulating water is continued; and the washing machine self-cleaning circulating filtering system is simply structured, requires low cost, and hand-operated block cleaning work via circulating water program stop can be avoided.

The invention discloses a device for filtering livestock and poultry breeding wastewater and recovering filter materials. The device is sequentially provided with a water distributing feeding region, a self-stirring and filtering region and a water collecting and discharging region from top to bottom. A drainage groove, a U-shaped water distributing groove, a triangular rinsing weir, a feeding hole and a feeding pipe are arranged in the water distributing feeding region; a straw filter material and a self-stirring device are arranged in the self-stirring and filtering region; and an inclined screen, a horizontal screen, an inclined drainage plate, a horizontal drainage plate, a water collecting chamber and a drain pipe are arranged in the water collecting and discharging region. The device disclosed by the invention integrates wastewater filtration and resource recycling, and is simple in structure and small in occupied area; by adopting a weir-type water distributing system, the device can be prevented from being blocked by solid matters; by adopting the self-stirring system, the filter materials are uniformly distributed and; the filter materials in the device are recovered, so that a biomass resource is fully utilized.

The present invention provides a dust collecting and processing system that sucks and collects fly waste generated during operation of a spinning machine or the like. In the dust collecting and processing system, a centrifugal separator is applied to a fly waste sucking section to prevent a possible variation in suction force and to reduce a machine frame size and power consumption. The dust collecting and processing system includes a large number of units (U) arranged in a machine frame (Ma) in one direction and each including a fly waste suction line (1) that sucks fly waste or the like, and a fly waste separating means (4) for separating the fly waste from suction air. The dust collecting and processing system sucks the fly waste generated during operation of each of the units (U) for separating and collecting the fly waste or like. The fly waste separating means (4) is provided for the fly waste suction line (1) in association with at least one unit (U). The fly waste separating means (4) includes a centrifugal separator (6). The centrifugal separator (6) separates and sucks the fly waste so that the separated fly waste is collected in a dust collecting section (31) via a fly waste conveying means (4).

The invention relates to a nozzle structure at the bottom of a refining furnace and a nozzle filling method. The nozzle structure at the bottom of the refining furnace comprises a seating brick, a nozzle brick, refractory lining, a refining furnace base, a plug, a rotatable bracket and a supporting frame, and is characterized in that: the nozzle brick is manufactured by adopting aluminum-carbon refractory material taking resin as bonding agent, and the chamfer angle of the upper mouth of an inner cavity of the nozzle brick is R58mm. The nozzle filling method comprises the following steps: in the situation that the lower mouth of the inner cavity of the nozzle brick is plugged and locked by the plug, cast-iron scrap is filled in the inner cavity of the nozzle brick to the height of 80-120mm and tamped, and then flow guiding sand is filled at the upper layer of the cast-iron scrap to the upper edge of the inner cavity of the nozzle brick and tamped so as to complete the plugging and filling of the nozzle, wherein the flow guiding sand adopts zirconium flow guiding sand. The invention has the advantages that: the aluminum-carbon refractory nozzle brick taking resin as bonding agent can meet the requirement of multi-box casting of the refining furnace, simultaneously the radian at the upper end of the inner cavity of the nozzle brick is changed from R90 to R58, the nozzle is tightly closed in the casting process, and the use of the zirconium flow guiding sand and the improvement of the filling method realize that multi-box casting molten steel of the refining furnace can automatically flow out along with the falling of the flow guiding sand, thus achieving the purpose of automatic casting.

The invention provides hedging twisting double-vortex kinetic energy pulping equipment. The equipment mainly comprises a water charging and feeding device, an air charging device, an upper vortex kinetic energy generating device, a lower vortex kinetic energy generation device, a smashing and filtering device and a liquid slurry storing device. The hedging twisting double-vortex kinetic energy pulping equipment is characterized by reverse vortex hedging twisting material breaking. Feeding amount can be controlled and a water charging and feeding buffering area can be sealed via a buffering plate; a liquid level can be controlled by a highest liquid level indicating rod and a liquid level observation plate; with an anticlockwise upper air inlet and a clockwise lower air inlet and an upper and lower conical cylinders, upper and lower vortex air flows can be accelerated, hedging twisting smashing force and equipment homonymous impact vibration can be achieved; with conical holes having large inner holes and small outer holes and arranged in an intersected way, broken material filtration and blocking prevention can be realized; filtering efficiency and impact stirring can be improved; fluid mutual flow between a slurry storage area and the lower vortex kinetic generation area and slurry storage area impact stirring can be realized via parallel holes.

The invention relates to an automatic garden irrigation device controlled by a computer. The device comprises a bottom plate, wherein the top of the bottom plate is fixedly connected with a shell, aninner cavity of the shell is provided with a water storage tank, the bottom of the water storage tank is fixedly connected with the bottom plate, the top of the water storage tank is fixedly providedwith a first motor, an output end of the bottom of the first motor is fixedly connected with a rotating shaft, the rotating shaft is fixedly connected with stirring blades, the left side of the firstmotor is provided with a water inlet pipe, the water inlet pipe is fixedly connected with the water storage tank, the right side of the water storage tank is connected with a water pump through a water outlet, the right side of the water pump is provided with a second motor, the bottoms of the water pump and second motor are both fixedly arranged on the bottom plate, an output end of the top of the second motor is fixedly connected with a screw rod, and the screw rod is movably connected with a lifting plate through a nut. The automatic garden irrigation device controlled by the computer can perform stirring automatically, facilitate the worker's operation, achieve the automatic start and stop of the irrigation device, avoid the waste of resources, and improve the irrigation efficiency.

The invention provides a super-hydrophobic pre-filled gravel sand control pipe and a preparation method thereof. The super-hydrophobic pre-filled gravel sand control pipe comprises a base pipe, a super-hydrophobic sand control pipe shell and a super-hydrophobic gravel layer; the base pipe is sleeved with the super-hydrophobic sand control pipe shell, and the super-hydrophobic gravel layer is filled between the base pipe and the super-hydrophobic sand control pipe shell; and the surface of the super-hydrophobic sand control pipe shell is provided with a first super-hydrophobic coating, the super-hydrophobic gravel layer is collected by super-hydrophobic gravel, and the surfaces of the super-hydrophobic gravel are provided with second super-hydrophobic coatings. The super-hydrophobic pre-filled gravel sand control pipe can not only realize the self-cleaning function of the sand blocking medium, but also can achieve the purpose of controlling water and increasing oil in high water cut well and prolong the stable production period of oil wells.

The invention relates to a purification tower having an anti-freezing function and used for acid mist treatment. The purification tower comprises a main body, an air inlet pipe, an air outlet pipe, afiller layer, a spraying device, a circulating device, a filtering mechanism and an anti-freezing mechanism. The filtering mechanism comprises a filter screen, a driving assembly, a transmission assembly, two connecting assemblies and two scraping plates; the anti-freezing mechanism comprises a rotating shaft, two first bearings and a plurality of stirring blades. According to the purification tower having the anti-freezing function and used for acid mist treatment, the impurity removal function is achieved through the filtering mechanism, the blockage probability of the spraying device is reduced, the practicability of equipment is improved, the stirring function is achieved through the stirring mechanism, the flowability of absorption liquid is improved, and the probability that the absorption liquid is frozen is reduced.

The invention relates to an electric dialyzator which is suitable for desalting fermentation liquor. The electric dialyzator comprises an electrodialysis membrane stack unit, a plurality of sensors / transducers and a programmable logic controller (PLC) control unit; and an integrated device consists of different functional units and is suitable for performing electrodialysis on complex solutions such as the fermentation liquor so as to realize online monitoring of a plurality of parameters such as electric conductivity, pH, temperature, flow rate, pressure, current-voltage-electric consumption and the like in the electrodialysis desalting process of the fermentation liquor, facilitate system state diagnosis and system protection and realize optimization of process condition for the electrodialysis desalting of the fermentation liquor through feedback control. The problems that the conventional electric dialyzator has high energy consumption and is difficult to run stably for a long time when used in a fermentation liquor desalting process and that effective key parameter monitoring, process control and the like are not performed are solved and engineering application of electrodialysis desalting technology of the fermentation liquor is promoted.

The invention relates to an antifouling dry-powdered emulsion paint. Global hardness is provided by the utilization of network-like mineral formed by white cement hydration; an ash-calcium modifying agent is added to improve properties of ash-calcium, and ash-calcium is carbonized to generate netted calcium carbonate which interpenetrates to reinforce middle and late hardness; supported by VAE redispersible latex powder, the system's flexibility and elasticity are improved; by the addition of a composite water reduction material, it is guaranteed that various materials are uniformly dispersed in the system, and micropore structure of the system is improved; by the addition of talcum powder and kaolin, construction performance is improved; by the addition of hydroxyethyl cellulose ether, the system's denseness and water retention capacity are increased; by the introduction of superfine nano-silica, compactness of the system is improved; by the addition of a water repellent, the coating is endowed with overall waterproofing property; and polyaluminum chloride is further added to react with calcium hydroxide in the system so as to generate expansile aluminium hydroxide and hydrated chloroaluminate. Thus, the coating becomes a compact integral body and has strong antifouling performance and good air permeability.

The invention discloses a multifunctional changeover valve. The multifunctional changeover valve comprises an automatic ball-point pen type pressing mechanism, a sealing guide rod, a first spring and a valve element body, wherein the automatic ball-point pen type pressing mechanism is triggered, and the first spring applies return force opposite to pressing force to the sealing guide rod, so that the sealing guide rod abuts against the pressing mechanism all the time; the pressing mechanism has high stroke and low stroke, so that the sealing guide rod performs up and down reciprocating motion along the axial position of the valve element body, and therefore, the first flow-guide hole or a second flow-guide hole is selectively plugged by a plug on the sealing guide rod, and a water inlet and a first water outlet or a second water outlet are opened / closed; and an included angle between the valve element body and a valve element seat body is rotated, so that an over-flow area of a flow regulating hole is changed, and therefore, the flow switching purpose is realized.

The invention belongs to the field of mechanical equipment, and especially relates to a flue gas wet method desulfurized gypsum slurry on-line density and pH value combined measuring device and a measuring method. The flue gas wet method desulfurized gypsum slurry on-line density and pH value combined measuring device comprises a measuring tank, wherein the top of the measuring tank is provided with a venthole, and the bottom is provided with a slurry discharge port, and a densitometer and a pH meter are arranged on the tank body, and are designed to stretch into the tank body; a sampling pipeline connected with the measuring tank, wherein one end of the sampling pipeline is connected with the tower bottom of a flue gas wet method desulfurization tower, and the other end is designed to stretch into the tank body of the measuring tank, and the end of the sampling pipeline stretching into the tank body is provided with a spray head. In applications of the flue gas wet method desulfurizedgypsum slurry on-line density and pH value combined measuring device, the sampling pipeline is designed to stretch into the measuring tank, the liquid level in the measuring tank is controlled at a degree that the densitometer and the pH meter are immersed, so that slurry density and pH value are obtained through measuring. The flue gas wet method desulfurized gypsum slurry on-line density and pHvalue combined measuring device is capable of realizing low maintenance, continuous on-line high-accuracy measuring of gypsum slurry on-line density and pH value.

The invention discloses a wellbore blowout prevention packer. The wellbore blowout prevention packer comprises an anchoring assembly and a blocking assembly, and further comprises an anchor sealing operation assembly, the blocking assembly is connected to the lower end of the anchoring assembly, the anchor sealing operation assembly is inserted into the inner cavities of the anchoring assembly andthe blocking assembly, the anchor sealing operation assembly is connected with an anchoring shifting fork of the anchoring assembly through a self torque pipe in a transmission mode, and the anchor sealing operation assembly is connected with a lower joint of the blocking assembly through a self central pulling pipe. According to the wellbore blowout blocking preventer, when the wellbore operation needs to be switched, the blowout preventer does not need to be removed, the device is directly placed into the wellbore through a derrick lifting system, and the wellbore blocking is quickly achieved through the rotating, lifting, compressing and setting of a hydraulic tong; and blowout accidents are prevented.

The invention relates to a biological enzyme composite blocking remover and a preparation method thereof, which belong to the technical field of oil field yield increase renovation. The blocking remover comprises the following components by mass: 0.1-0.5% of biological enzyme, 3-5% of a biological surfactant, 5-10% of a biological enzyme stabilizer, and the balance of water; the biological enzyme comprises at least one of xylanase, lipase, cellulase, mannase, protein complex enzyme, amylase and xanthan gum lyase; the biological surfactant is prepared from at least one of the following components: the biological surfactant is mainly prepared from rhamnolipid, sophorolipid and N-acetylgalactosamine; and the biological enzyme stabilizer comprises at least one of the following components: disodium ethylene diamine tetraacetate, citric acid and triethanolamine. The biological enzyme composite blocking remover provided by the invention can solve the problems of permeability reduction and the like caused by low-permeability and medium-low-permeability reservoir reconstruction residual gum and organic matter (wax, asphaltene and the like) blocking in the later development period.

The invention discloses an automatic dedusting method and system for a dust removal pipeline. The automatic dedusting method comprises the steps that dust deposition weight data of each detection point in the dust removal pipeline are obtained; the dust deposition thickness of each detection point is calculated according to the dust deposition weight data; the pipeline blockage degree P and the dust deposition rate V of each detection point are calculated according to the dust deposition thickness, and the average dust deposition rate V<avg> of all the detection points is calculated according to the dust deposition rates V; when the pipeline blockage degree P of a certain detection point reaches the set value, dedusting is conducted by increasing the air door open degree of a pipeline body where the detection point is located; and when the average dust deposition rate V<avg> reaches the set value, the dust deposition rate is decreased by increasing the air door open degree of a main pipeline body. According to the automatic dedusting method and system for the dust removal pipeline, energy consumption of a dust removal system can be significantly reduced; pipeline abrasion is effectively relieved; long-term stable operation of the dust removal system is ensured; and in addition, the method adopts an automatic feedback closed-loop control mode, so that manual operation is not needed, and the operation and maintenance workload is small.

The invention provides a melting device for metal casting based on liquid level equal altitude, and relates to the technical field of metal castings. The melting device for metal casting based on theliquid level equal altitude comprises a furnace body, and a crucible is fixedly installed in the furnace body; a feeding port is formed between the furnace body and the right end of the crucible; a coil is wound in the furnace body; a first lifting rod is connected in the crucible in a sliding manner; a pipeline is formed on the left side of the crucible; and a second lifting rod is connected in the pipeline in a sliding manner. Due to the melting device for metal casting based on liquid level equal altitude, the degree of melting can be known about in real time, metal liquid is discharged intime after complete melting, and therefore energy waste caused by overtime smelting is avoided, and the phenomenon that the heat loss is caused due to the fact that a furnace cover needs to be openedis avoided; and energy saving is better and efficiency is higher, it is not needed to take the crucible when the metal liquid is collected, the smelting process can be continuously performed easily, and more time and labor are saved.

The invention provides a mud discharging pipe structure of a dredger and belongs to the technical field of machines. The mud discharging pipe structure of the dredger comprises a pipe body. The pipe body is sleeved with multiple floating bodies having buoyancy in the axial direction. The floating bodies and the pipe body are in clearance fit. The pipe body is made of a non-magnetic material. A cavity is formed in each floating body. Electromagnets are arranged in each cavity and located at the two ends of the corresponding floating body. A limiting block is further arranged at the free end of the pipe body. By means of the mud discharging pipe structure of the dredger, in the use process, the electromagnets on the floating bodies are controlled so that the polarities of the adjacent floating bodies can be opposite and can be mutually attracted, and therefore the multiple floating bodies can be gathered together to increase the buoyancy or gravity of the pipe body at the position to meet work requirements; and the polarities can also be the same so that the floating bodies can get away from one another, the buoyancy loaded on the pipe body is scattered, and the purpose of adjusting the walking direction of a mud discharging pipe or bending the mud discharging pipe can be achieved.

The invention relates to a washing machine. A door cover is installed on a washing machine shell, an inner drum outer cover capable of stretching in the inner drum direction is installed on the innerside of the door cover, an outlet communicated with the interior of an inner drum is formed in an inner drum opening, and the inner drum outer cover generates stretching motion under the action of thedriving mechanism, so that the outlet is blocked or opened, and water contained in the inner drum is discharged from the outlet. In this way, the inner drum outer cover can generate stretching displacement in the axis direction of the inner drum relative to the door cover, and correspondingly fit or separate relative to the inner drum opening in the door cover stretching process, and then the purpose that the outlet is blocked, and then the water stored in the inner drum is used for normal washing of the washing machine is achieved; or the purpose that the outlet is opened, washing water in the inner drum is discharged outside is achieved. Meanwhile, in the washing process of the washing machine, the washing water is only contained in the inner drum, pollution of the washing water to theouter wall of the inner drum is avoided, and the cleanliness of washing of the washing machine is improved. In addition, an outer drum is not needed for sleeving the exterior of the inner drum, the volume of the inner drum is increased, and the washing volume of the washing machine is increased.

The invention provides an electrically controlled water discharging device. The electrically controlled water discharging device comprises: a housing installed at the bottom of a water channel body and a solenoid valve; a lifting mechanism is arranged inside the housing; one end of the solenoid valve is connected with the lifting mechanism through a zipper, and the other end of the solenoid valveis electrically connected with a control mechanism, wherein the control mechanism is mounted on the water channel body. According to the electrically controlled water discharging device, the control mechanism sends an instruction to actuate the solenoid valve, lifting and lowering of the lifting mechanism are achieved, so as to achieve conduction and blockage between the water channel body and a sewage pipeline, so that a drainage effect can be achieved when a user's hand is not entering the water body, and the operation is convenient and reliable; in addition, the solenoid valve is independent of the housing, so that the solenoid valve is in a dry environment and the reliability of the solenoid valve is improved.