143 results about "Nozzle clogging" patented technology

The invention provides an intelligent decision-making dynamic cooperative control method for a roller cooling system, and relates to the field of industrial production intelligent control. The method comprises the following steps that the spraying state of each nozzle is monitored in real time; the minimum cooling liquid injection amount of process cooling in the rolling process is calculated; the sectional cooling flow in the rolling process is calculated, and the sectional cooling flow is not lower than the minimum cooling liquid injection amount; master-slave control is formed by process cooling and subsection cooling, the process cooling is responsible for macroscopic temperature field regulation and control, and local defect compensation is executed by the subsection cooling; when it is detected that the nozzles are blocked or fail, the flow compensation algorithm of the adjacent nozzles is started, and the standby micro nozzles are activated to execute fine compensation flow distribution; and after sectional cooling fails, on the basis of executing fine compensation flow distribution, roller fine cooling is adopted to eliminate defects of composite wave shapes, namely high-order plate shapes. The method can effectively solve the problem of high-order plate shape defects caused by failure of a sectional cooling system, and the stability and precision of plate shape control are improved.

The invention discloses a method for improving castability of aluminum-containing steel in a continuous casting process, which comprises the following steps of: S1, controlling components of molten steel, and accurately controlling the content of acid-soluble aluminum in molten steel of a continuous casting ladle to be 0.020-0.060% according to mass percent; s2, calcium treatment is conducted on the molten steel, and the calcium-aluminum ratio is controlled to range from 0.10 to 0.15; s3, continuous casting process control is conducted, specifically, the superheat degree of tundish molten steel is stably controlled to range from 15 DEG C to 30 DEG C, meanwhile, constant pulling speed operation is adopted, and the pulling speed fluctuation range is controlled within + / -0.1 m / min; and S4, the content of SiO in the casting powder is reduced to be smaller than or equal to 20%, and meanwhile, the alkalinity R of the casting powder is 1.5-2.0. The continuous casting process is ensured to be smooth, nozzle nodulation and casting blank surface defects are effectively prevented, and the production efficiency and the product quality are remarkably improved.

The invention relates to the technical field of desulfurization equipment, and discloses a desulfurization device which comprises a tower body, the tower body is communicated with a gas outlet pipe, a discharge pipe and a liquid outlet pipe, and a double-centrifugal separation system, a spray desulfurization system and an adsorption desulfurization system are sequentially arranged in the tower body from bottom to top; the double-centrifugal separation system comprises an inner centrifugal barrel, the outer side wall of the centrifugal barrel communicates with an air inlet pipe, the air inlet pipe is arranged in the tangential direction of the side wall of the centrifugal barrel, and an inner spiral channel is formed in the inner centrifugal barrel through a plurality of spirally-arranged inner spiral plates; the inner wall of the tower body is provided with an outer spiral channel through a plurality of spirally arranged outer spiral plates, the inner centrifugal barrel is provided with a flow guide hole, and the flow guide hole is an inclined round hole. Centrifugal separation is performed twice through the double centrifugal separation systems, so that the content of particles entering a subsequent spraying desulfurization system and an adsorption desulfurization system is greatly reduced, and the adsorption desulfurization efficiency is improved. The nozzle blocking risk and the pollution of an adsorption material are reduced, and the overall desulfurization efficiency is effectively improved.

The application discloses a wall coating spraying robot and belongs to the technical field of coating spraying, which comprises a mobile body, a spraying manipulator arranged on the mobile body, a material collecting seat installed on the spraying manipulator, a plurality of connecting tubes, one end of each of the connecting tubes being installed on the material collecting seat and the other end of each of the connecting tubes being detachably connected with a spraying nozzle, a sealing disc rotatably connected in the connecting tube, a transmission mechanism arranged on the outer wall of the connecting tube, a through-plugging mechanism connected with the sealing disc, when the spraying nozzle is blocked, the sealing disc is closed by operating the transmission mechanism, and the spraying holes of the spraying nozzle are synchronously dredged by the through-plugging mechanism when the sealing disc rotates, so that the coating spraying robot can avoid needing to stop and clean multiple times, the operation is simple, and the working efficiency is high; when the spraying nozzle needs to be detached, the sealing disc can be closed by the transmission mechanism, the transmission mechanism releases the restriction on the spraying nozzle at the moment, and then the spraying nozzle can be detached, the passage of the coating can be interrupted due to the closure of the sealing disc, the coating can be prevented from being sprayed out when the spraying nozzle is detached, and the operation safety is greatly improved.

This utility model discloses a slurry proportioning adjustment device for biomineralization, including a mixing tank and a support frame. The support frame is located at the center of each of the four sides of the top of the mixing tank. A support cover is provided at the bottom of the mixing tank via legs. A stirring shaft is located at the center of the mixing tank, with stirring rods evenly distributed on the stirring shaft. Rotating rods are located at the center of both sides of the support cover, and stirring rods are evenly distributed on the rotating rods inside the mixing tank. An annular tube is located at the top of the mixing tank, and an inlet pipe connected to an external water storage tank is located on one side of the top of the annular tube. An annular toothed block is located on the top of the mixing tank inside the annular tube, and an L-shaped brush facing the annular tube is located at the center of one side of the bottom of the annular toothed block. This utility model improves the uniformity of the slurry by achieving more comprehensive mixing, and the annular tube can be cleaned after mixing to prevent nozzle clogging.

This application relates to a gluing machine and process for footwear athletic shoes. The gluing machine includes a transport frame, a spray gun tube, and a sealing element. A nozzle is slidably connected inside the spray gun tube, and an air inlet pipe is connected to the outer wall of the spray gun tube. An air pump is located at the end of the air inlet pipe away from the spray gun tube. An elastic element is provided between the sealing element and the nozzle. The elastic element has elastic potential energy to push the nozzle towards the air inlet pipe. When the air pump is turned off, the nozzle can move away from the sealing element under the action of the elastic element. The sealing element includes a rubber stopper. A sealing hole is opened on the outer wall of one end of the rubber stopper. The glue outlet end of the nozzle is slidably connected to the rubber stopper through the sealing hole. After the gluing of the shoe upper is completed, the nozzle moves away from the rubber stopper under the action of the elastic element until the glue outlet end of the nozzle retracts into the rubber stopper through the sealing hole. The inner wall of the sealing hole wraps around the glue outlet end of the nozzle, thereby reducing the risk of residual glue at the nozzle outlet end hardening upon contact with air, leading to nozzle clogging.

The utility model relates to the technical field of aluminum powder atomizers, in particular to an atomizer nozzle assembly which comprises a nozzle body, and the nozzle body comprises a molten aluminum circulation body, a primary air cavity wrapping body and a secondary air cavity wrapping body. The replaceable nozzle is composed of a round pipe section, a flange section connected with the lower end of the round pipe section and an upper bent section connected with the outer edge of the flange section, a limiting spigot corresponding to the round pipe section is formed in the lower edge of the inner circumferential face of the molten aluminum circulation body, and a plurality of primary airflow inlets corresponding to the primary impact flow channels are formed in the outer circumferential wall of the round pipe section. A plurality of secondary airflow inlets corresponding to the secondary impact runners are formed in the peripheral wall of the round pipe section, an annular positioning table located on the inner side of the upper bent section of the replaceable nozzle is arranged at the lower end of the secondary air cavity wrapping body, and the flange section of the replaceable nozzle is connected and fixedly connected with the bottom face of the annular positioning table. When the nozzle is blocked, the nozzle main body does not need to be replaced, so that the use cost is saved.

The utility model discloses a novel laminar flow cooling pressure stabilizing header device, which relates to the technical field of hot rolling laminar flow cooling headers and comprises a header main pipe, a flow stabilizing pipe and a filter screen, one end of the header main pipe is connected with a connecting hose through a connecting component, the other end of the connecting hose is connected with a connecting pipe, a pneumatic butterfly valve is mounted on the connecting pipe, and the filter screen is connected with the pneumatic butterfly valve. A plurality of upper spray pipes are connected to the header main pipe, a clamping ring is arranged at one end of the flow stabilizing pipe, a first clamping groove for clamping of the clamping ring is formed in one end of the header main pipe, a water outlet is formed in the flow stabilizing pipe, and the filter screen is clamped to one end of the header main pipe through a clamping assembly; through the arrangement of the flow stabilizing pipe, water sprayed by the plurality of spray pipes can be uniform, the quality of strip steel is ensured, the quality objection is reduced, production accidents caused by non-uniform cooling are reduced, and through the arrangement of the filter screen, the water can be filtered, and the blockage of the plurality of spray nozzles is reduced, so that the cooling efficiency is improved.

The objective is to provide a snow-melting nozzle clogging improvement tool and method that have a simple structure, exhibit excellent performance in improving clogging, and offer excellent workability. [Solution] A snow melting nozzle clogging improvement tool for improving clogging of water spray holes 21 formed in a snow melting nozzle 20 embedded in the road surface, the tool having a contact portion 1 that comes into contact with the water spray hole forming surface 20a of the snow melting nozzle 20, the contact portion 1 being configured to generate impact or vibration, and the contact portion 1 being made of an elastic material, the tool being configured to improve clogging of the water spray holes 21 by bringing the contact portion 1 into contact with the water spray hole forming surface 20a of the snow melting nozzle 20 and continuously applying impact or vibration.

This invention belongs to the technical field of humidification devices, specifically relating to a workshop cooling and humidification device, including a main pipeline and a riser. The main pipeline is equipped with nozzles, and the nozzles are mounted on connecting frames. The connecting frames are connected to impact blocks. The nozzles are equipped with an anti-clogging mechanism, which includes an insertion rod, a first spring, and a transmission assembly. The impact block has a sliding groove. The transmission assembly includes a first bracket, a pull wire, and a plastic ball. One end of the pull wire is fixedly connected to the insertion rod. The main pipeline is equipped with an annular seat, and the other end of the pull wire extends into the main pipeline. The plastic ball is fixedly connected to the pull wire. The pull wire is machined with a sliding rod, the annular seat has a sliding cavity, and the sliding rod is machined with a sealing sliding plate. The first bracket is equipped with a fixed pulley, and the pull wire passes over the fixed pulley. This invention utilizes the water flow in the main pipeline to allow the insertion rod to be inserted into and withdrawn from the nozzle port. During use, the insertion rod can withdraw from the nozzle port; after use, the insertion rod can be inserted into the nozzle port, preventing nozzle clogging.

This utility model relates to the field of gas carriers and provides a seawater spraying system for gas carriers. It includes a deck spray pump, the input end of which is connected to a seawater main pipe, and the output end of which is connected to a spray main pipe. The spray main pipe connects to multiple spray branches, and high-pressure compressed gas pipelines and low-pressure compressed gas pipelines are connected to the spray main pipe. Seawater is used to spray the entire deck and critical equipment compartments, achieving functions such as cooling and fire suppression. A vent valve is installed to promptly drain seawater from the pipelines. Freshwater pipelines, in conjunction with high-pressure compressed air pipelines, are used to dilute and flush the seawater in the pipelines, preventing nozzle clogging and corrosion from residual seawater. Low-pressure compressed air, in conjunction with a timer, intermittently blows through the pipelines and nozzles, keeping the pipelines dry and preventing nozzle clogging, ensuring the entire seawater spraying system is in optimal condition.

This invention relates to the field of additive manufacturing technology and discloses a nozzle suitable for additive manufacturing of continuous fiber reinforced composite materials. The nozzle includes a main body and a stirring mechanism installed at the bottom of the main body. During operation, the stirring mechanism reduces the risk of material carbonization due to excessively high nozzle temperature. In this invention, the openings of the rotating plate and the stirring plate are staggered, causing softened material to accumulate on the top of the stirring plate. When the accumulated material exceeds the unopened portion of the stirring plate, it pushes the mixing plate to rotate. This rotation mixes the internal and external materials, reducing nozzle clogging caused by overheating and material carbonization during prolonged operation of the additive manufacturing machine. This improves the smoothness of material output from the nozzle during additive manufacturing.

This utility model relates to the field of water spraying devices, and more particularly to a high-pressure fine water mist spraying device, including a water tank; it also includes a cleaning seat and a nozzle. A filter screen is fixedly connected inside the water tank, and a cleaning seat is provided between the water tank and the filter screen. A water pump is fixedly connected to the upper end of the inner wall of the water tank and inside the filter screen. A support base and a controller are fixedly connected to the upper end of the water tank, and an internal toothed ring is rotatably connected to the inner wall of the support base. Through the use of the cleaning seat, external water is filtered through the filter screen, effectively intercepting impurities in the liquid, preventing nozzle clogging, and improving atomization efficiency. The water pump pumps the filtered water in the water tank to the distribution pipe, and the water is sprayed out by the nozzle for water spraying. After a period of use, the cleaning seat moves up and down to thoroughly remove the sediment on the outer wall of the filter screen and the inner wall of the water tank. Regular cleaning is performed, which has a high degree of automation, improves the cleaning effect and efficiency, reduces the maintenance frequency, and extends the service life of the nozzle.

This invention discloses a deodorization device for wastewater treatment, comprising: a rotating rod that rotates circumferentially within a sealed chamber; a rotating assembly disposed on the surface of the rotating rod, with an airflow pipe on one side of the rotating assembly, the airflow pipe being transmitted to the rotating rod via the rotating assembly; a centrifugal cup located above a blade assembly to carry liquid, the centrifugal cup being connected to the rotating rod, the centrifugal cup having a strip-shaped protruding water-retaining ring on its outer side, and a water-spraying groove on its surface, the water-spraying groove being converging from the inside out, and the water-spraying groove corresponding to the position of the water-retaining ring; and a water supply assembly with its outlet located at the top of the centrifugal cup. This invention generates water mist by utilizing the purely mechanical physical principle of centrifugal projection and impact crushing, and the large size of the water-spraying groove completely solves the problem of nozzle clogging caused by particulate matter and bioflocs in the deodorizing absorption liquid, achieving maintenance-free operation.

The present invention provides a technology for maintaining, in a mold, an ideal fluidized state which was assumed at the time of design, by preventing blockage of a nozzle. Provided is a submerged entry nozzle through which, when continuous casting of steel is carried out, molten steel is supplied from a molten steel storage container into a mold of a continuous casting machine that carries out the continuous casting, wherein: an end of a nozzle body of the submerged entry nozzle which is submerged in the molten steel in the mold is closed; an upper portion and a lower portion of a part of the nozzle body which is submerged in the molten steel are each provided with a pair of discharge ports that are symmetrical with respect to the central axis; an inner bottom of the nozzle body has an inclination which continues to a lower end of each of the discharge ports in the lower part; and a downward inclination angle θ1 with respect to the horizontal direction is within the range of not less than 10° but not more than 45°.

According to the technical scheme, the desulfurization device is characterized in that the desulfurization device comprises a desulfurization bin, an air inlet pipe is arranged outside the desulfurization bin, an exhaust pipe is arranged on the outer circle wall face of the desulfurization bin, an installation disc is arranged in the desulfurization bin, a plurality of nozzles are arranged on the bottom face of the installation disc, and the nozzles are arranged in a cross shape; the rotating assembly is arranged on the top face of the mounting disc and used for rotating the mounting disc, through the arrangement of a rotating shaft, a liquid inlet pipe and a rotating shaft rotating sleeve, an absorbent can be continuously and stably supplied to the nozzle, and when a driving motor is started, the driving motor drives a second belt wheel to rotate; the second belt pulley drives the first belt pulley to rotate through the belt, so that the rotating shaft is driven to rotate, the rotating shaft drives the mounting disc in the desulfurization bin to rotate, the spraying range of the nozzles is increased, a small number of nozzles meet the spraying requirement, the burden of the pump is reduced, and the risk of nozzle blockage is reduced.

The utility model discloses a gravity type sander for a locomotive capable of effectively preventing a nozzle of the sander from being blocked, and relates to the technical field of locomotive accessories. The sand spraying valve comprises a valve body and an air inlet pipe connector arranged on the left side of the valve body in a communicating mode, the bottom of the valve body is provided with a sand spraying pipe in a communicating mode, and the sand spraying valve further comprises a sand spraying part installed in the valve body; the regulation and control part is positioned in the valve body; wherein the sand spraying part is communicated with the regulation and control part, the sand spraying part comprises a sand raising assembly, and the sand raising assembly is arranged in the air inlet pipe joint; and the sand blowing assembly is arranged in the valve body. By arranging the sanding part, the problems that in the using process of an existing locomotive gravity type sander, when compressed air input is suddenly closed, air pressure in a pipeline is suddenly reduced, air easily flows back to form negative pressure, and sand is driven to flow reversely, so that the sand is accumulated and blocks an air nozzle, and the normal exertion of the sanding function is influenced are solved.

This application relates to a horizontally positioned 3D printing nozzle, comprising a horizontally positioned mixing cylinder, a drive mechanism, a first screw, and a nozzle. The mixing cylinder includes a feeding section and a heating section arranged sequentially. The feeding section has a feed inlet communicating with the inner cavity of the mixing cylinder, and a heating block is arranged on the outer periphery of the heating section. The first screw is disposed inside the mixing cylinder and penetrates the inner cavity of the mixing cylinder. The front end of the first screw is connected to the drive mechanism, and the spiral groove depth near the front end of the first screw is greater than the spiral groove depth near the rear end. The heating block has a first cavity located at the extended section at the end of the mixing cylinder and a second cavity perpendicular to the first cavity and communicating with the outside. The end of the first screw extends into the first cavity, and the nozzle is installed in the second cavity. This horizontally positioned 3D printing nozzle integrates feeding, mixing, and extrusion into a single design, solving the problems of slow extrusion, uneven extrusion volume, and even nozzle clogging of high-viscosity materials during the printing process. It is also small in size and simple in structure.

The present invention discloses a flow cell sorter nozzle clogging monitoring and cleaning method, belonging to the field of cell sorting. The flow cell sorter nozzle clogging monitoring and cleaning method of the present invention connects a flow resistance element to a sheath liquid output pipeline to increase the flow resistance of the entire flow path, and analyzes the nozzle clogging state by pressure detection of a flow chamber. To facilitate the evaluation of the flow resistance of each component in the liquid path, a flow meter is connected between the sheath liquid flow path and the droplet generator flow path. The flow path between the sheath liquid tube inlet and the nozzle outlet is subjected to circuit equivalence according to the flow path-circuit equivalence principle, and the flow resistance of each component in the liquid path is calculated. The increase ratio of the nozzle flow resistance at time t is calculated, and the nozzle clogging state and whether automatic cleaning is possible are determined based on the error limit and the increase ratio of the nozzle flow resistance.

The invention discloses a rare earth steel sheet billet production method, which relates to the technical field of metallurgical continuous casting, and comprises the following steps of: alternately pouring refined molten steel containing rare earth elements into an inlet of a crystallizer by adopting a first intermediate tank and a second intermediate tank, so that the molten steel in the crystallizer is not cut off; after the number of times of pouring of the first intermediate tank reaches the first preset number of times, refined molten steel containing rare earth elements is poured into an inlet of the crystallizer through the second intermediate tank, and the first intermediate tank is moved to a standby area to replace a first water gap; and after the number of times of pouring of the first intermediate tank reaches a second preset number of times, refined molten steel containing rare earth elements is poured into the inlet of the crystallizer through the second intermediate tank, the first intermediate tank is moved to the standby area to be replaced with a new first intermediate tank, and the second preset number of times is larger than the first preset number of times. The problem that continuous production cannot be achieved or the production process is long due to production interruption caused by serious nozzle nodulation during rare earth steel continuous casting can be solved.

To provide an inkjet ink which suppresses the occurrence of nozzle clogging and is excellent in storage stability.SOLUTION: In the inkjet ink, the pigment is a quinacridone pigment. The specific resins are neutralization products of specific copolymers containing an α - methylstyrene-derived unit, a styrene-derived unit, a (meth) acrylic acid-derived unit, and a (di) alkylene glycol (meth) acrylate-derived unit in specific proportions, and the specific copolymers have acid values of 50mgKOH / g or more and 300mgKOH / g or less and number-average molecular weights of 3000 or more and 18000 or less. The neutralization ratio of the specific resin is from 20% to 100%. The specific crosslinking agent contains a polyfunctional epoxy compound and has a water solubility rate of 80% or more. The crosslinking rate of the crosslinked resin is 25% or more and 90% or less. The alkali metal ion concentration in the aqueous media is 500ppm or less.SELECTED DRAWING: None

The utility model discloses an additive nozzle aperture dynamic adjusting mechanism which comprises a water supply pipe, a nozzle dynamic adjusting structure is arranged in the water supply pipe, an anti-blocking vibration structure is arranged on the surface of the water supply pipe, the top end of the water supply pipe is fixedly connected with a connector, a nozzle is arranged in the water supply pipe in a sliding mode, and the water supply pipe is connected with the nozzle. And the bottom end of the water supply pipe is fixedly connected with a spring positioning ring. According to the additive nozzle aperture dynamic adjusting mechanism, the nozzle dynamic adjusting structure is arranged to be matched with the anti-blocking vibration structure, after an outlet of the nozzle is blocked, water pressure in the water supply pipe is increased, and then the spring pushing ring is pushed to descend; liquid is discharged from the interior of the water spraying pipe to push the push plate to drive the knocking hammer to rotate to knock the ratchet wheel to generate vibration, so that objects blocking the interior of the nozzle are discharged from an outlet of the nozzle, and the problem that the nozzle is blocked by solid particles can be effectively avoided.

The invention relates to an ozone type oral irrigator which comprises a body and a water tank, a nozzle, a battery, a motor and a water pump are arranged on the body, a base is arranged on the lower portion of the body, a water inlet pipeline and an ozone module are arranged on the base, and the ozone module comprises an upper cover, a cathode piece, an anode piece and a lower cover, the water inlet pipeline and the ozone module are respectively and independently arranged on the base. The cathode plate, the anode plate and the lower cover are all provided with a plurality of holes, the upper cover is detachably connected with the base, and the upper cover is detachably connected with the cathode plate, the anode plate and the lower cover. The detachable connection between the upper cover and the base is rotary buckle connection. The water inlet pipeline is formed by assembling a silicone tube, a filter screen pressing tube, a filter screen and a filter screen support. The probability that the nozzle is blocked can be reduced, the concentration of generated ozone cannot be affected after scaling is cleaned, and the phenomenon that water is fed slowly or cannot be fed into the oral irrigator is avoided.

The present application relates to the technical field of gas atomization device, and discloses a tight coupling nozzle structure and a gas atomization device, the tight coupling nozzle structure comprises a gas atomization nozzle disc and a flow guide pipe, the gas atomization nozzle disc is composed of a coaxial nozzle disc upper cover and a nozzle disc base, the flow guide pipe is inserted into the center hole of the thickness of the nozzle disc upper cover and forms a tight coupling assembly structure with the gas atomization nozzle disc, the vertical spacing between the nozzle disc gas outlet and the outer wall of the flow guide pipe is equal to the bottom ring thickness of the nozzle disc upper cover, the bottom ring thickness of the nozzle disc upper cover is 1-2 mm, the inner core of the flow guide pipe is a cylindrical hole, the outside is an integrally formed cylindrical section and a contraction section, and the contraction angle of the flow guide pipe contraction section is 30-60 degrees, the present application optimizes the contraction angle of the flow guide pipe contraction section and the bottom ring thickness of the nozzle disc upper cover, reasonably controls the position of the atomization backflow area, obtains higher fine powder yield, and reduces the probability of nozzle blockage.

The present application relates to a kind of high titanium sulphur welding wire steel production method, comprising: 1) converter smelting: control end point temperature, carbon content and phosphorus content;2) refining: carry out slagging and diffusion deoxidation, use low calcium ferrosilicon, high-silicon silicon manganese, low-carbon ferromanganese and titanium-iron cored wire alloying;Power supply is supplied twice, control the content of acid-soluble aluminum and dissolved oxygen in molten steel, control the nitrogen content of molten steel after refining is completed;3) continuous casting: control the casting speed and tundish superheat, add carbon-free pre-melted high-alkalinity covering agent, control the alkalinity, viscosity and composition of protective slag, control the nitrogen absorption amount of molten steel.The present application is aimed at the problem of nozzle clogging in continuous casting, adopts BOF-LF-CC production process, through the optimization of steelmaking, refining, continuous casting and mixed pouring process, can effectively avoid nozzle clogging, at the same time, improve the number of continuous casting furnace, the yield of casting blank and the surface quality of casting blank, reduce the production cost, provide strong technical support for small billet production of high titanium sulphur welding wire steel.

An image forming device including an ink jet head includes a detection unit that detects a degree of nozzle clogging of the ink jet head, a first determination unit that determines a type of cleaning of the ink jet head, the type of the cleaning having different execution periods based on the degree of the nozzle clogging detected by the detection unit, an acquisition unit that acquires a user's usage tendency of the image forming device, and a second determination unit that determines an execution clock time of the cleaning to be performed next time based on the type of cleaning determined by the first determination unit and the usage tendency acquired by the acquisition unit.

The utility model relates to the technical field of leachate back-spraying, and discloses a leachate back-spraying device for a household garbage incineration plant, which comprises an incinerator and a spraying pump arranged at the side part of the incinerator, the outlet end of the spraying pump is connected with a conveying pipe, the outlet end of the conveying pipe is connected with a flow dividing pipe, and the flow dividing pipe is connected with the incinerator. A plurality of spraying pipes are arranged on the side, close to the incinerator, of the flow dividing pipe and extend into a hearth of the incinerator. According to the percolate back-spraying device, the rotating water wheel, the output shaft and the cleaning rod with the bristles are integrated, the cleaning mechanism is driven through the energy of fluid, spraying holes can be continuously prevented from being blocked without external power, the spraying head is automatically closed in the non-spraying stage through the design of a normally-closed opening and closing plate, harmful smoke is effectively isolated, smoothness of the spraying holes is doubly guaranteed, and the percolate back-spraying device is convenient to use. Torque output is improved through the multi-stage impeller design, powerful cleaning is ensured, quick disassembly and maintenance are facilitated through the thread and flange connection mode, and the overall structure remarkably reduces the maintenance frequency and cleaning difficulty of the spray head.

According to the cleaning device for the spraying layer of the desulfurizing absorption tower, after the desulfurizing absorption tower is shut down, due to the fact that residual limestone slurry can exist in a branch pipe of the desulfurizing absorption tower, the limestone slurry can be gradually condensed, a nozzle can be blocked, and follow-up use is affected. The spray tower comprises a tower body, a spray layer is fixed in the tower body, the spray layer comprises a main liquid pipe, a plurality of branch pipes are uniformly distributed on two sides of the main liquid pipe, a plurality of spray pipes are arranged at two ends of each branch pipe, and a nozzle is fixed on each spray pipe; the input end of the main liquid pipe is connected with a tee joint, and the tee joint is communicated with the main water pipe; the main water pipe is connected with a water passing pipe, the two sides of the water passing pipe are communicated with a plurality of branch water pipes opposite to the branch pipes in position, the two sides of each branch water pipe are connected with water spraying pipes, and water spraying openings of the water spraying pipes face the nozzles. The cleaning device is used for cleaning the spraying layer of the desulfurizing absorption tower.

The present invention provides a nozzle cleaning device, a burner using the device, and a wall-mounted boiler, relating to the technical field of wall-mounted boilers. The device comprises an ejector pin and a drive assembly connected to the ejector pin, which drives the ejector pin to reciprocate in the direction of the nozzle opening to unclog the nozzle. Based on the technical solution of the present invention, the ejector pin can fully unclog the burner nozzle, preventing dirt from accumulating within the nozzle and effectively preventing nozzle clogging. This not only ensures the long-term normal operation of the unit, but also significantly reduces the frequency of equipment maintenance, greatly improving the user experience.

The utility model relates to the field of concrete spraying operation, and discloses a nozzle assembly and a wet spraying machine. The nozzle assembly comprises a nozzle, one end of the nozzle is open, and the other end of the nozzle is sleeved with a nozzle sleeve to form a communicating cavity. The nozzle assembly further comprises a cleaning device arranged in the communicating cavity, the cleaning device comprises a cleaning mechanism, the cleaning mechanism comprises a rotating shaft and a cleaning piece installed at one end of the rotating shaft, and a plurality of water outlets are formed in the rotating shaft and communicate with an external water source. The driving mechanism is connected with the other end of the rotating shaft and used for driving the rotating shaft to rotate and driving the rotating shaft to move back and forth in the communicating cavity. The wet spraying machine comprises the nozzle assembly. According to the nozzle assembly and the wet spraying machine, the nozzle can be prevented from being blocked, the service life of the nozzle is prolonged, the replacement time and cost are reduced, the construction interruption time is shortened, and the construction efficiency is improved.