754results about How to "No clogging" patented technology

The present invention belongs to the technical field of evaporative condensers, and is particularly an evaporative condenser with multi-stage heat exchange, comprising a shell, an air intake grille is provided on the inner walls of the shell, an evaporative heat exchange coil, a spray component and a precooling heat exchange coil are provided inside the shell, the spray component is located above the evaporative heat exchange coil, the precooling heat exchange coil is located above the spray component, and the precooling heat exchange coil is connected to the evaporative heat exchange coil, and an induced draft fan is provided on the top of the shell. The present invention can scrape and collect impurities attached to the inner wall of the filter cartridge through a scraping and collecting mechanism that moves up and down and rotates, and can make cooling water into a vortex from outside to inside through a recoil mechanism that moves up and down and rotates, and the filter cartridge is recoiled by the vortex, and the impurities flushed down can be collected by the scraping and collecting mechanism, so as to ensure the cleanliness of the circulating water sprayed by the spray component, so that it will not cause clogging of the spray component and will not cause damage to the evaporative heat exchange coil.

The invention discloses a device for enhancing ion membrane-passing mass transfer based on all-channel flow electrode capacitive deionization, which comprises solution chambers, a cathode flow electrode chamber and an anode flow electrode chamber, the solution chambers comprise a first solution chamber and a second solution chamber, and an anion exchange membrane is arranged between the solution chambers; the two solution chambers are respectively provided with a flow guide plate, and the flow guide plate comprises a high-conductivity saline-water mixed solution channel; the water flow directions of the two solution chambers are opposite; the first solution chamber and the second solution chamber contain a high-conductivity saline mixed solution which is formed by mixing pretreated seawater and a high-conductivity material; the invention further discloses a sea water desalination system, the middle solution chamber is additionally arranged, a high-conductivity material is added into the middle solution chamber, a flow guide channel of the middle solution chamber and mixed solution convection of different solution chambers are designed, and the phenomena of high resistance of an FCDI device system and membrane-liquid interface concentration polarization are solved; the desalting efficiency and the energy consumption performance are enhanced; the operation cost is reduced.

The invention discloses a dam body anti-icing and anti-freezing device, and relates to the related technical field of water conservancy and hydropower engineering buildings, the device comprises an air pump, the output end of the air pump is connected with an air inlet pipe, the air inlet pipe is suspended in a water body, the device further comprises a bubble unit, and the bubble unit comprises a driven pipe; a plurality of driven pipes are evenly arranged on the air inlet pipe in the axial direction of the air inlet pipe in a running fit mode, a plurality of exhaust pipes are evenly arranged on each driven pipe in the axial direction of the air inlet pipe, the two ends of each exhaust pipe are each provided with a bubble pipe, and the same exhaust pipe and the bubble pipes at the two ends of the same exhaust pipe are connected to form a Z-shaped pipe fitting. When the water surface needs to be subjected to anti-icing treatment, the air pump is started to convey air into the driven pipe through the corrugated pipe and the air inlet pipe, and the air in the driven pipe is exhausted from the exhaust pipe and the bubble pipe, so that microbubbles exhausted from the bubble pipe can prevent the water surface from icing, and the bubble pipe drives the driven pipe to rotate on the air inlet pipe; and the risk of bubble pipe blockage can be greatly reduced.

The invention belongs to the technical field of low-pressure corrosion foils, and particularly relates to a post-processing method of a low-pressure corrosion foil. The post-treatment method comprises the following steps: carrying out the following operations on the aluminum foil subjected to corrosion, acid pickling and first water washing: S1, removing an aluminum hydroxide layer blocking a corrosion hole; and S2, soaking in a mixed solution of acid and water with the pH value of 5-6.5 for 2-4 minutes, washing with water for the second time, and then carrying out chip burning treatment. According to the post-treatment method disclosed by the invention, at least 80 days of continuous treatment can be realized without causing blockage of reaction tank equipment, and the prepared low-pressure corrosion foil has relatively high specific volume.

The invention discloses a blockage detection method, a blockage treatment method, a control device and an air conditioning system. The blockage detection method comprises the steps that temperature parameters, pressure parameters and power parameters of the air conditioning system are obtained, and whether the air conditioning system is blocked or not is judged according to the temperature parameters, the pressure parameters and the power parameters of the air conditioning system; and on the basis that the temperature parameter meets the first preset condition, the pressure parameter meets the second preset condition and the power parameter meets the third preset condition, it is judged that the air conditioning system is blocked. According to the blockage detection method, blockage of the air conditioning system can be found in time, and blockage can be treated conveniently in time to prevent abnormal operation of the system caused by blockage.

The invention provides a batch straight pipe outer wall spraying device with a water-based paint recycling function. The batch straight pipe outer wall spraying device comprises a sealed cabin, a spraying mechanism, a drying mechanism, a liquid supply mechanism, a recycling mechanism and a numerical control module. The spraying mechanism and the recycling mechanism are both arranged in the sealed cabin, and the recycling mechanism communicates with the spraying mechanism; the spraying mechanism comprises a spraying rod and a centrifugal roller, a to-be-sprayed pipe fitting is installed in the spraying direction of the spraying rod through pipe fitting fixing assemblies, and the pipe fitting fixing assemblies are distributed on the inner wall of the centrifugal roller in an arc shape; the drying mechanism is used for drying a to-be-sprayed pipe fitting, and the liquid supply mechanism is connected with the spraying mechanism and the recycling mechanism; the numerical control module is in signal connection with each mechanism; by means of the spraying mechanism, the drying mechanism and the recycling mechanism, the spraying, recycling and drying integrated function is achieved, the pipe fittings are subjected to batch high-quality spraying, meanwhile, coating recycling is achieved, the situation that the surrounding environment is polluted due to the fact that the coating escapes is prevented, and the production efficiency is greatly improved.

The invention relates to the technical field of seeding, and discloses a seeding spacing-adjustable seeding machine, which comprises a seeding assembly, a storage box, a fixing frame arranged below the storage box, a rotating disc arranged in the fixing frame, a gas hood fixed on one side of the fixing frame, and a seed suction opening formed in the rotating disc; the auxiliary assembly is arranged on the rotating disc and comprises a sleeve and a pushing part, the sleeve is fixed in the seed suction opening, the sleeve is conical, and an air hole is formed in the sleeve; the pushing part comprises a pushing plate located on one side of the sleeve, a supporting frame is arranged on one side of the sleeve, a movable column is fixed to one side of the pushing plate, and a rotating sleeve is rotationally connected to one side of the supporting frame through a bearing. Through the arrangement of the auxiliary assembly, the seeding assembly can adapt to seeds of different sizes in the seeding process, so that the conditions of seed suction opening blockage and seeding missing are avoided.

The utility model discloses a stamping structure with a waste cleaning function for automobile part machining, belongs to the field of stamping structures for automobile part machining, and aims to solve the problems that in the stamping process of automobile parts, more waste is generated and is easily accumulated on the stamping structure, the follow-up work of operators is influenced, and the production efficiency is influenced. Air suction can be carried out through an air suction pump, so that waste can be sucked in from a through hole and enters a cleaning storage box through a conical hopper to be collected, meanwhile, an electric push rod can drive a scraping plate to do reciprocating motion, the waste in the female die can be pushed, the waste falls down from the through hole, treatment of the waste in the female die can be accelerated, and the machining efficiency is improved. And meanwhile, the eccentric knocking block can be driven to rotate through the micro motor, the conical hopper can be knocked, the situation that the waste blocks an opening in the bottom of the conical hopper, and discharging of the waste is affected is avoided.

The invention belongs to the technical field of evaporative condensers, and particularly relates to a multi-stage heat exchange evaporative condenser which comprises a shell, air inlet grilles are arranged on the inner wall of the periphery of the shell, an evaporation heat exchange coil pipe, a spraying piece and a pre-cooling heat exchange coil pipe are arranged in the shell, the spraying piece is located above the evaporation heat exchange coil pipe, and the pre-cooling heat exchange coil pipe is located above the spraying piece. The pre-cooling heat exchange coil pipe is located above the spraying piece and communicates with the evaporation heat exchange coil pipe, and an induced draft fan is arranged at the top of the shell. Impurities attached to the inner wall of the filter cartridge can be scraped and collected through the scraping and collecting mechanism which moves up and down and rotates, cooling water can be made into vortexes from outside to inside through the backflushing mechanism which moves up and down and rotates, and backflushing is conducted on the filter cartridge through the vortexes. And the washed impurities can be collected by the scraping and collecting mechanism, so that the cleanness of circulating water sprayed by the spraying piece is ensured, the spraying piece cannot be blocked, and the evaporation heat exchange coil cannot be damaged.

The invention relates to a mixed transportation pipeline hydrate blockage risk grading method which comprises the following steps: determining the height of a sedimentary bed layer in a pipeline based on the hydrate generation deposition amount in the pipeline, and determining a hydrate blockage risk area and grade in the pipeline through an established hydrate blockage area judgment criterion. And finally, the hydrate blockage risk grading method in the mixed transportation pipeline is formed. According to the method, the risk of pipeline blockage can be comprehensively evaluated, the design optimization work of a pipeline transportation system is guided, and the method has important significance on hydrate flow safety guarantee.

The invention relates to the technical field of filtered water treatment, in particular to an aeration filtered water treatment device which comprises a water aeration tank, an air compressor fixed on a sewage aeration tank and a cross-shaped communicating pipe fixed in the sewage aeration tank, and the air compressor is communicated with the cross-shaped communicating pipe through a pipeline; the buoy monitoring mechanism is arranged in the sewage aeration tank, the buoy monitoring mechanism comprises a sealing shell, a micro water pump is fixed on the bottom wall of the sealing shell, the input end of the micro water pump is communicated with an L-shaped pipe, and a thermistor is fixed in the L-shaped pipe. By virtue of a pressure sensor and a thermistor in the buoy monitoring mechanism, the sewage condition in the sewage aeration tank can be monitored in real time, so that microorganisms in the sewage aeration tank have sufficient oxygen for metabolism, the decomposition speed of organic matters in the sewage is accelerated, and the sewage treatment efficiency is improved. And the rotating speed can be automatically adjusted by the protective lantern ring and the protective frame according to the sewage content in the sewage aeration tank.

The invention relates to the technical field of straw processing, in particular to a straw smashing device for agricultural waste recycling and processing, and aims to solve the problems that in the prior art, blades are prone to damage, and filtering is blocked. Comprising a recycling treatment box, a supporting foot stand used for supporting is arranged at the lower end of the recycling treatment box, a vertical partition plate is vertically arranged in the recycling treatment box, a feeding port is formed in the portion, on the left side of the vertical partition plate, of the recycling treatment box, a feeding hopper is arranged at the position of the feeding port, and a guiding pipeline used for guiding straw into the feeding port is arranged at the lower end of the feeding hopper. The device is designed according to existing needs, straw can be subjected to rotary shaking treatment, stones in the straw can be removed, the straw can be ground and broken, subsequent smashing is facilitated, missing stones can be treated in the grinding treatment process, a structure enabling a filtering area to swing in a reciprocating mode and conduct back flushing is constructed, and the filtering effect is improved. Therefore, the filtering is not blocked, and the processing continuity is ensured.

The invention provides an energy-saving ore crushing device for lead-zinc concentrate production, which comprises a supporting table, a conveying belt is assembled in the supporting table, a crushing mechanism is fixedly mounted at the top of the supporting table, a transfer assembly is fixedly mounted on the supporting table on one side of the crushing mechanism, and a hoisting mechanism is assembled at the driving end of the transfer assembly. A hoisting mechanism is arranged on the bottom of the crushing mechanism, a hanging mechanism is hoisted at the bottom of the hoisting mechanism, a material guiding assembly is fixedly installed on the portion, on the other side of the crushing mechanism, of the supporting table, an installation cover body is fixedly installed on the top of the material guiding assembly, and a knocking assembly is assembled in the installation cover body. Through the hanging mechanism, the crushing device can work according to the actual crushing condition, the device achieves the effect of switching three working forms, the device can assist a feeding channel in dredging operation, ore in the crushing device body can be compensated, meanwhile, a crushing toothed plate in the device body can be hoisted and replaced, and the crushing efficiency is improved. And personnel are assisted in mounting the crushing toothed plate.

The invention relates to the technical field of aero-engine turbine blade cooling, and discloses an aero-engine turbine blade cooling structure and a pre-cooling method.The aero-engine turbine blade cooling structure comprises an inner wall and an outer wall which are of a double-layer structure, the inner wall is arranged in the outer wall, the inner wall comprises a wall face, and a plurality of impact holes are formed in the wall face in parallel in a penetrating mode; a plurality of cooling channels are arranged in the wall surface in parallel; the cooling channels are arranged among the impact holes; each cooling channel comprises an inlet end and an outlet end; the inlet end is connected with a fuel oil system and is used for feeding fuel oil into the cooling channel; the outlet end is connected with a fuel oil system and used for discharging fuel oil in the channel to the fuel oil system. The diameter of the cooling channel is within 1mm; and a plurality of air film holes are formed in the outer wall. Cooling gas in the turbine is pre-cooled through aviation fuel, so that the cooling effect of the turbine is further improved.

The present invention discloses an ambient air constant-current automatic sampling system and a sampling method thereof. The system includes a vacuum sampling tank, a buffer container and a switching valve. The buffer container is respectively connected to the vacuum sampling tank and the atmospheric environment through the switching valve. Through the switching control of the switching valve, the buffer container is alternately connected to the atmospheric environment and the vacuum sampling tank to achieve the pressure balance of the sampled gas. The present invention also discloses a constant-current ambient air sampling method. The present invention breaks the foreign technical monopoly on high-precision atmospheric constant-current sampling devices, ensures the accuracy of atmospheric sampling flow control, ensures the inertness of the overall gas flow path, has flexible flow control and adjustment methods, uses commonly used industrial mass-produced devices and materials, realizes consumable-free and easy maintenance, and constructs an economical and efficient fully automatic ambient air constant-current automatic sampling system, contributing to the country's atmospheric environment monitoring and governance.

The high-water-content shield muck crushing device comprises a shell, a feeding port, a crushing mechanism, a dewatering mechanism, a separating mechanism, a muck recognition system and a control system, the two ends of the crushing mechanism are connected with the shell and installed on the outer wall of the shell, and the feeding port is formed in the top of the shell and used for inputting soil materials; a dehydration mechanism is arranged below the crushing mechanism, a separation filter screen is arranged on the lower surface of the dehydration mechanism, and a drainage plate is arranged below the dehydration mechanism; the muck recognition system comprises a feeding conveying belt, a support and recognition equipment, the recognition equipment is installed above the feeding conveying belt through the support and comprises a laser scanning sensor, an infrared sensor and a thermal imager, and the laser scanning sensor is used for detecting the particle shape and size of shield muck; the infrared sensor is used for detecting the temperature of the muck, and the thermal imager is used for providing a temperature distribution diagram; and the control system controls the crushing mechanism according to data detected by the laser scanning sensor, the infrared sensor and the thermal imager.

The invention discloses a silicon nitride powder spreading and compacting device, and relates to the technical field of silicon nitride powder spreading and compacting devices.The silicon nitride powder spreading and compacting device comprises a main body, a frame is fixedly installed on the upper surface of the main body, a motor is fixedly installed on the lower surface of the frame, and an extrusion block is fixedly installed on the lower surface of the motor; an electric push rod is fixedly mounted on the side, close to the frame, of the main body, a cutting block is fixedly mounted on the side, close to the frame, of the electric push rod, a square groove is formed in the bottom of the cutting block, a feeding groove is fixedly formed in the right side of the main body, and a collecting device is arranged on the upper surface of the main body; materials attached to the surfaces of the extrusion blocks are collected, and the collected materials are poured into the collecting groove, so that the materials can be effectively utilized, waste is avoided, and meanwhile, the situation that the materials are wasted due to the fact that the shapes of the materials are changed when the materials are extruded due to excessive accumulation of the materials on the surfaces of the extrusion blocks can be prevented.

The invention discloses a flue gas cooling treatment system, and relates to the technical field of flue gas cooling treatment. The device comprises a cooling and dedusting tower and a pretreatment tower, wherein the top of the cooling and dedusting tower is fixedly connected with a smoke pipe. The cleaning assembly and the circulating cooling assembly are arranged, after flue gas makes contact with washing liquid, large-particle dust and the washing liquid can make contact with a filter plate according to the gravity effect, the large-particle dust stays on the surface of the filter plate, the washing liquid falls on a drainage plate after being filtered, and therefore the large-particle dust can be effectively removed. At the moment, the circulating cooling assembly is started to operate to quickly cool the water washing liquid, the water washing liquid flows into the connecting water pipe again and is sprayed out through the spraying piece, so that cooling and recycling of the water washing liquid are achieved, waste of water resources and environmental pollution are reduced, and the water treatment cost of enterprises is reduced; and the surface of the filter plate is circularly cleaned, so that blockage caused by accumulation of large-particle dust on the filter plate is avoided.

The invention provides a seedling planting device for rice planting, and relates to the field of rice transplanting devices. The seedling planting device for rice planting comprises a seedling storage assembly, a seedling transplanting assembly, a power assembly and a linkage assembly, and a vibration assembly is mounted on one side of the bottom surface of the seedling storage assembly; the seedling storage assembly comprises a seedling box, one end of the seedling box is open, the other end of the seedling box is of an arc-shaped contraction structure, and a vertical groove is formed in the arc-shaped contraction structure of the seedling box and communicates the inside and the outside of the seedling box. According to the seedling planting device for rice planting, by arranging the seedling transplanting assembly and the linkage assembly, the roots of seedlings cannot be damaged when the seedlings are moved out of the bottoms of the vertical grooves, so that the high survival rate of seedling transplanting can be achieved, the seedlings can be immediately separated from the pointed cones when being brought out, and the seedlings cannot be brought out of soil again; when the depth is in place, the pointed cones are in a longitudinal state, so that the seedlings are prevented from lodging when being transplanted.

The utility model discloses a preparation device for high-viscosity hydroxypropyl starch ether, which belongs to the technical field of chemical equipment, aims to solve the problem that the adding speed of raw materials cannot be adjusted according to the reaction rate, and comprises a reaction kettle, supporting legs are fixedly mounted at the bottom of the reaction kettle, and an air adding device is fixedly mounted on the right side of the top of the reaction kettle. A feeding mechanism is arranged on the left side of the top of the reaction kettle, and an adjusting mechanism is mounted on the feeding mechanism; according to the utility model, through the arrangement of the adjusting mechanism, when starch raw materials are added into the reaction kettle, the adding speed of the starch raw materials can be adjusted according to the specific reaction process in the reaction kettle, so that the reaction speed of the starch raw materials in the reaction kettle is improved, the starch raw materials are fully reacted, and the product quality is further improved; in the process of adding the raw materials into the reaction kettle, the adding speed of the raw materials can be adjusted, meanwhile, blockage can be avoided when the raw materials are added, and thus the smooth completion of the reaction is guaranteed.

The utility model discloses a dust remover for urban planning building construction, and relates to the technical field of dust removers. The dust removal device comprises a vehicle body, a dust removal box is fixedly connected to the top of the vehicle body, a dust suction pipe is fixedly connected to the left side of the dust removal box, a collection box is connected to the left side of the dust removal box in an inserted mode, a dust removal assembly is arranged in the dust removal box and comprises a filter cartridge, and a plurality of leakage grooves are formed in the filter cartridge. According to the dust removal device, the dust removal assembly is arranged, specifically, in the dust collection process, the motor is started to drive the gear to rotate, the gear drives the filter cartridge to rotate through the gear ring, particles on the filter screen are thrown out under the action of centrifugal force and discharged out of the leakage groove, and the thrown-out particles enter the collection box to be collected under the flow guide action of the flow guide plate; in this way, the situation that particles adhere to the filter screen can be greatly reduced, so that the problem of blockage is avoided, and workers do not need to frequently clean the filter screen.

The invention belongs to the technical field of organic fertilizer production wastewater treatment, and discloses an organic fertilizer production wastewater treatment device and a treatment method thereof, wherein the organic fertilizer production wastewater treatment device comprises an installation box, an inclined inclined material plate is fixedly installed in the installation box, a through groove is opened in the middle of the inclined material plate, a filter screen is fixedly installed in the through groove, a vertically arranged telescopic scraper mechanism is arranged above the filter screen, the lower end of the telescopic scraper mechanism contacts the upper surface of the filter screen, a suction port is opened on the bottom of the telescopic scraper mechanism, a driving mechanism for driving the telescopic scraper mechanism to move on the filter screen is arranged on the installation box, a cleaning mechanism is arranged on the installation box, a working end of the cleaning mechanism is connected with the suction port through a pipeline, and the cleaning mechanism is used to generate negative pressure suction at the suction port to perform negative pressure suction on debris on the filter screen; the invention can clean organic fertilizer and debris intercepted on the filter screen to avoid clogging the filter hole.

The utility model relates to the technical field of colloidal powder proportioning and packaging equipment, and discloses a colloidal graphite powder proportioning device. The colloidal graphite powder proportioning device comprises a rack and a workbench, the powder conveying mechanism is arranged above the workbench, and the powder conveying mechanism comprises a material bin, a material groove, a material guide pipe and a straight vibrator; a conveying groove is formed in the material groove, a discharging opening is formed in the bottom of one end of the conveying groove, a discharging opening of the material bin is in material guiding connection with the end, away from the discharging opening, of the conveying groove, the material guiding pipe is perpendicularly connected to the discharging opening, and the straight vibrator is arranged below the material groove and fixedly connected with the bottom of the material groove. According to the colloidal graphite powder proportioning device, graphite powder can be linearly output from the material bin sequentially through the material groove and the material guide pipe and finally output from the discharging nozzle, material blockage cannot be caused in the process, meanwhile, the materials cannot be extruded, and therefore the required amount of the graphite powder can be accurately conveyed into the measuring cup, and the proportioning accuracy of the colloidal graphite powder is ensured.

The utility model aims to disclose a modularized countercurrent heat exchange plate type air pre-heater which comprises a plate type heat exchange unit, the plate type heat exchange unit comprises at least one layer of heat exchange module and flow guide modules, and the flow guide modules are arranged on the upper layer and the lower layer of the heat exchange module respectively. The flow guide module arranged on the upper layer of the heat exchange module is connected with a smoke inlet connector and an air outlet connector, and the flow guide module arranged on the lower layer of the heat exchange module is connected with a smoke outlet connector and an air inlet connector. Compared with the prior art, the defects that a rotary air pre-heater is blocked and an all-welded plate type air pre-heater can only exchange heat in a cross flow mode are overcome when the flue gas flow is large, the dust containing rate is high and substances prone to bonding are contained, the plate distance can be flexibly adjusted through the height of the protruding points, the air pre-heater is suitable for large-flow flue gas, blocking is avoided, and the service life of the air pre-heater is prolonged. Countercurrent flow heat exchange of the whole air pre-heater is achieved due to the existence of the flow guide strips, the end difference of the air pre-heater is small, the heat exchange efficiency of the air pre-heater is greatly improved, and the purpose of the air pre-heater is achieved.

The utility model discloses a mixing reaction kettle for producing white carbon black, which comprises a base, a reaction kettle body arranged at the upper end of the base, a flange arranged at the upper end of the reaction kettle body, a top cover arranged at the upper end of the flange, a motor arranged at the upper end of the top cover, and a rotating rod arranged at the output end of the motor, two connecting rods are fixedly connected to the outer side of the rotating rod, vertical rods are arranged at the lower ends of the two connecting rods, scrapers are arranged on the side walls of the two vertical rods, a conveying cutter is arranged at the lower end of the rotating rod, the lower end of the reaction kettle body communicates with a discharging port, and the lower end of the conveying cutter extends into the discharging port. According to the structure, the vertical rod is matched with the scraping plate, so that the vertical rod drives the scraping plate to rotate in the rotating process, the inner wall of the reaction kettle body can be cleaned by utilizing the scraping plate, material residues are avoided, and the discharge port can be prevented from being blocked when materials are discharged by utilizing the conveying knife.

The utility model relates to the field of rice crushing, and discloses a rice processing crusher which comprises a shell, a hopper is arranged at the top end of the shell, a coarse particle discharge port is formed in the bottom end of the shell, the shell is rotationally connected with a roller, the hopper and the coarse particle discharge port are vertically aligned, and a shaking plate is hinged to the position, located at the hopper, of the shell. The shell is rotatably connected with a first rotating shaft located at the bottom end of the hopper, the first rotating shaft is coaxially provided with a cam, the shaking plate intersects with the motion trail of the cam, and the first rotating shaft is linked with the roller; the shell is connected with a positioning plate, the positioning plate is provided with a transmission chain in vertical transmission, the transmission chain is fixedly provided with a plurality of positioning shafts, rotating shafts of the positioning shafts are connected with a feeding bin, an overturning plate is arranged on the outer side of the feeding bin, the positioning plate is fixedly connected with an overturning shaft intersecting with the movement track of the overturning plate, and a torsional spring is arranged between the positioning shaft and the feeding bin; the device has the effects of preventing blockage and automatically filtering and returning to crush again.

The dewatering well structure comprises a foundation pit of a columnar structure, a vertically-arranged water suction pump is arranged in the foundation pit, a water drainage pipe is arranged at a water drainage opening in the top of the water suction pump, the water drainage pipe and the foundation pit are coaxially arranged, the water outlet end of the water drainage pipe extends out of the foundation pit, and the foundation pit is sequentially provided with a well pipe area and a filtering area from top to bottom. A well pipe is coaxially arranged in the well pipe area, the side wall of the well pipe is sealed and free of holes, the filtering area is provided with a filtering pipe which is coaxially arranged with the filtering area, holes are evenly distributed in the side wall of the filtering pipe, and a hole net component is arranged on the side wall of the filtering pipe. The problems that a reinforcement cage is large in reinforcement amount and high in construction cost, fine particles easily cross the reinforcement cage through gravel gaps to enter a tube well, the filtering effect is poor, a pump pipe is finally blocked, and the dewatering effect is affected are solved, and the device can be widely applied to the field of foundation pit construction.

The utility model relates to the technical field of conveying hoppers, and discloses a cement conveying hopper which comprises a cylinder, a conical barrel is fixedly arranged at the top end of the cylinder, a shielding mechanism is arranged on the upper portion of the conical barrel, and a discharging mechanism is arranged in the cylinder. Through cooperative use of a shielding plate, a fixed plate, an L-shaped column, a U-shaped plate, an electric push rod, a moving block, a sliding block, a sliding groove and a rotating column, the shielding plate rotates to be combined with the upper surface of a conical barrel, the conical barrel can be shielded when not used, it is avoided that cement in the conical barrel is dried and solidified due to direct sunlight from the outside, the use effect is good, and the shading effect is achieved; and by arranging the discharging mechanism, when a set of material leaking holes in the movable circular plate and a set of material leaking holes in the fixed circular plate are consistent in vertical position, the cement falls through the two sets of material leaking holes, then uniform discharging is achieved, and feeding blockage is avoided.

A conveyor belt dust collection and processing device relates to the technical field of dust removal equipment, including a dust collector, a conveyor belt dust removal device, a throwing point dust suction device, and a material drop point dust suction device. The conveyor belt dust removal device includes a dust removal hood, a collection gill, and an air duct fan. The dust removal hood is formed by overlapping multiple sections of telescopic hood bodies, and a group of support frames are arranged at intervals on each section of the hood body. The collection gills are formed by overlapping multiple gill bodies in sequence, and a group of air duct fans are arranged at intervals along the length direction of the collection air duct. The dust collector includes a shell, a spiral blade, and a transmission shaft. The throwing point dust suction device includes a first dust suction hood and a first dust suction fan, and the material drop point dust suction device includes a second dust suction hood and a second dust suction fan. The present invention has a simple structure, reliable performance, and is easy to install. It does not affect the maintenance of the conveyor belt, and can achieve better dust removal and processing effects for particles of different sizes, and dusts of different humidity and viscosity, and has a low failure rate.

The utility model discloses a 3D printing head structure for ceramic products, and aims to overcome the defects that the discharging stability of a 3D printing head is poor, and the printing quality is affected. A material extrusion screw is installed in the printing cylinder, a feeding nozzle is arranged on the side wall of the printing cylinder, an extrusion nozzle is arranged at the lower end of the printing cylinder, the feeding nozzle is connected with an extrusion cylinder through a pipeline, and an extrusion piston is installed in the extrusion cylinder. Due to the double extrusion effect of the extrusion piston and the extrusion screw, printing materials can be stably and reliably extruded, the blocking phenomenon is avoided, and the printing quality of ceramic products can be guaranteed.