153results about How to "Avoid turbulence" patented technology

The flow stabilizing device comprises a feeding pipe, a vertical discharging pipe, a reverse feeding barrel and a guide plate, the upper end and the lower end of the discharging pipe are each of an opening structure, and the barrel wall of the reverse feeding barrel is arranged on the outer side of the discharging pipe; the lower end of the barrel wall is connected with the pipe wall of the discharging pipe in a watertight mode through the barrel bottom, the upper end of the barrel wall is higher than the upper end of the discharging pipe, and a feeding port communicated with the feeding pipe is formed in the lower portion of the barrel wall. And the guide plate is wound between the pipe wall of the blanking pipe and the barrel wall of the reverse feeding barrel in a spiral ascending manner. The flow stabilizing device provided by the utility model can effectively stabilize the flow of the ore pulp before the ore pulp enters the concentration tank of the concentration system, so that the ore pulp can be sufficiently flocculated, and the concentration effect is remarkably improved.

The utility model relates to an electromagnetic water tunnel device, which belongs to the field of hydrodynamic experiments and comprises a base, two electrode plates, a magnetic part and an ion supplement device. Wherein a water channel is formed in the base, and water flows in the water channel; one section of the water channel is a power section; the two electrode plates are respectively positioned on two side walls of the power section; an electric field is formed between the two motor plates; the magnetic part is arranged above the power section; the magnetic field of the magnetic part is perpendicular to a connecting line between the two electrode plates; the ion supplementing device is used for supplementing ions to water in the water channel; water in the power section is electrified through the electrode plate, and Lorentz force is formed through interaction of the magnetic field of the magnetic part and the electrified water flow so as to achieve movement of the water flow.

The invention discloses a 3D (three-dimensional) printing method capable of spreading powder while printing, which belongs to the technical field of 3D printing and comprises the following steps: S1, by taking a powder spreading scraper as a reference, arranging areas with a plurality of widths in the front and back of the moving direction of the powder spreading scraper as laser sintering closing areas, defining the printing working surface at the front part of the laser sintering closing area as an upper-layer pattern printing area, and defining the printing working surface at the rear part of the laser sintering closing area as a lower-layer pattern printing area; and S2, a powder spreading scraper moves at a constant speed to spread powder, the laser sintering closing area moves along with the powder spreading scraper, the width of the upper-layer pattern printing area and the width of the lower-layer pattern printing area change along with the powder spreading scraper, and meanwhile, laser is adopted for conducting laser sintering printing on the upper-layer pattern printing area and the lower-layer pattern printing area. The time of laser printing image interruption caused by powder laying can be shortened, and the printing speed is increased.

The utility model relates to the technical field of mechanical engineering, in particular to an air-floating suspension high-speed fan box which comprises a frame, supporting legs are arranged at the bottom of the frame, rubber pads are arranged at the bottom ends of the supporting legs, an air outlet flange door plate is arranged on the left side of the frame, and a ventilation door plate is arranged on the right side of the frame. The defects in the prior art are overcome, certain errors can be generated in the installation process by utilizing the ductility of the hoses through the corresponding hoses, the installation difficulty and the production cost can be reduced by replacing steel pipes with the hoses, gaps can be filled through the arranged noise reduction cotton, and the noise reduction effect is good. Through the arrangement of the air exhaust box, smooth flowing of airflow can be ensured, right-angle or acute-angle turning is avoided, sudden change and disturbance of the airflow in the air duct are reduced, the uniformity and stability of airflow flowing are improved, the airflow is guided to flow in the preset direction, and turbulent flow and impact are reduced.

The utility model discloses a brake disc casting mold which comprises a pouring cup and a mold core, the transverse pouring gates comprise the first transverse pouring gate and the second transverse pouring gate, the first transverse pouring gate is connected with the pouring cup and extends outwards in the first direction, the second transverse pouring gate is connected with the pouring cup and extends outwards in the second direction, and a first included angle space is formed between the first transverse pouring gate and the second transverse pouring gate; the cavity is provided with a first inlet and a second inlet, and the first inlet and the second inlet are symmetrically distributed on the two sides of the cavity relative to the center of the cavity; wherein the mold cavity comprises a first mold cavity, the first mold cavity is arranged in the first included angle space, the first cross gate is connected to a first inlet of the first mold cavity through the first flow gate, and the second cross gate is connected to a second inlet of the first mold cavity through the second flow gate. The brake disc casting mold is excellent and stable in mechanical property, the brake performance of a whole vehicle can be improved, meanwhile, defective products can be reduced, and the production and management cost of an enterprise is reduced.

The invention relates to the field of port construction and production, in particular to a multifunctional floating operation platform for port and navigation, which comprises a plurality of floating box bodies, a deck is arranged at the tops of the floating box bodies, platform frames are arranged on the left and right sides of the top of the deck, and a head-on plate is arranged at the front end of the deck and is of a plate-shaped structure. By arranging the self-adaptive anti-impact assembly, the angle of the anti-impact plate can be automatically adjusted according to the water flow impact strength, when water flow impacts the head-on plate from the front side, the anti-impact plate can automatically rotate through the synergistic effect of a linkage plate, a first linkage block, a second linkage block, a rotating block and other components, and when water flow impact is small, the anti-impact plate can automatically rotate. The anti-impact plate is in the initial state that the anti-impact plate is flush with the left side and the right side of the deck, small water flow can be effectively prevented from interfering the internal structure of the platform, the normal working environment of the platform is maintained, and when large water flow impact occurs, the anti-impact plate can rotate to a proper angle in time, the contact area with the water flow is increased, and the water flow impact force is better received and dispersed.

The invention discloses a high-efficiency mist-discharging high-capacity atomizing tank which comprises a tank body and a tank cover, the tank cover is detachably arranged at the upper end of the tank body, a mist outlet is formed in the middle of the tank cover, an atomizing core mounting cavity is formed in the lower portion of the mist outlet, an atomizing core is mounted in the atomizing core mounting cavity, and the atomizing core is mounted in the atomizing core mounting cavity. The atomizing core mounting cavity is communicated with the outside through a compressed air inlet, one side of the top of the tank cover is provided with an air supply port penetrating through the top and the bottom, the lower side of the atomizing core is in butt joint with a liquid suction pipe vertically extending to the bottom of the tank body, and a liquid suction channel is formed in the liquid suction pipe; the upper end of the liquid suction channel is communicated with a nozzle at the lower end of the atomizing core, a surrounding part surrounding the atomizing core is arranged in the middle of the lower end of the tank cover, a mist gathering cavity is defined by the surrounding part, and the mist gathering cavity is communicated with the mist outlet through a communication groove. The problems that an existing atomization tank is small in compressed gas flow rate application range and low in atomization efficiency can be solved.

The utility model relates to a kind of for prothioconazole oxidation synthesis light heavy component automatic separation device, belong to chemical production technical field, including prothioconazole oxidation synthesis component phase tank, mixed liquor regulating valve, light component regulating valve, heavy component regulating valve, flowmeter, mixed liquor regulating valve, light component regulating valve, heavy component regulating valve, flowmeter are all set to prothioconazole oxidation synthesis component phase tank, prothioconazole oxidation synthesis component phase tank is provided with mixed liquor feed inlet, light phase outlet, heavy phase outlet, blow-off, the utility model, optimization tank body structure realizes unpowered high-efficiency separation, reduce equipment cost, improve separation precision and product purity, by phase tank stratification structure optimization, light / heavy phase outlet height difference design and valve control, to effectively reduce entrainment rate, interface height and flow are monitored in real time, dynamically regulate valve opening, when heavy component proportion increases, automatically increase heavy component valve opening, to effectively reduce artificial dependence.

The invention discloses a heat recovery device of an artificial climate chamber refrigerating system, and relates to the technical field of heat recovery. The heat recovery device of the refrigeration system of the phytotron comprises a refrigeration device, a discharge port is formed in the outer wall of the refrigeration device, and a guide mechanism is fixedly connected to the outer wall of the refrigeration device. According to the heat recovery device for the refrigerating system of the phytotron, by means of the special structural design of the bent pipe and the application of the Bernoulli principle, it is ensured that impurities carried by gas can smoothly flow into the impurity box under the pushing of pulse airflow through the pressure difference formed at the exhaust hole, and in the long-term operation process, even if the gas contains many impurity particles, the impurities can still flow into the impurity box. Impurities such as dust and greasy dirt are removed, deposition of the impurities in the bent pipe and a follow-up heat recovery component is reduced, the problem that an airflow channel is blocked due to impurity accumulation is solved, stable operation of the device is guaranteed, and the equipment maintenance cost and downtime caused by blocking are reduced.

The invention relates to the technical field of coating film making equipment, in particular to a building waterproof coating film making device and application thereof.The building waterproof coating film making device comprises a bottom plate, a square mounting groove is formed in the bottom plate, and a scraper is arranged in cooperation with the mounting groove; the scraper comprises a pair of sliding rails which are symmetrically arranged, and the pair of sliding rails are connected with the two ends of the scraper in a sliding mode through sliding sleeves correspondingly. The sliding sleeve is connected with the scraper through a connecting piece, and an adjusting mechanism is arranged on the connecting piece. The height of the scraper can be accurately controlled to adjust the thickness of a coating film, the scraper is uniformly stressed, and the thickness of each part of the coating film can be consistent; through the adjustable base provided with the laser leveling mechanism, the bottom plate can be accurately controlled to keep horizontal, so that the coating film making quality is effectively improved, and the phenomenon of non-uniform coating is avoided.

The utility model relates to the technical field of electric tilting valves, and discloses a novel electric tilting valve which comprises a supporting pipe, annular connecting plates are fixedly connected to the front end and the rear end of the supporting pipe respectively, a plurality of mounting holes are formed in the middles of the annular connecting plates, and annular limiting grooves are formed in the front end and the rear end of the supporting pipe respectively. The middle of the inner wall of each annular limiting groove is fixedly connected with an annular rubber ring, the annular rubber rings and the limiting grooves are arranged, the rubber rings are embedded in the annular limiting grooves in the two ends of the supporting pipe, double sealing is formed through pressing, and the leakage problem caused by vibration or deformation of a traditional valve body is solved; the installation holes in the annular connecting plate support rapid flange installation, the sealing face is evenly stressed, local stress concentration caused by traditional bolt direct connection is avoided, the servo motor and the rotating shaft are arranged, the rotating angle of the rotating shaft is controlled through the servo motor, and linear adjustment of flow or pressure is achieved.

The utility model discloses a grassland irrigation device for grassland-light complementation, relates to the technical field of grassland-light complementation systems, and aims to solve the technical problem that the current irrigation device is inconvenient to carry out variable irrigation on water source demand quantity according to different areas of grassland under a photovoltaic panel. The irrigation pipeline is composed of the first rectangular pipe, the second rectangular pipe, the third rectangular pipe and the fourth rectangular pipe, and the first rectangular pipe, the second rectangular pipe, the third rectangular pipe and the fourth rectangular pipe are sequentially sleeved from outside to inside. And the pipe diameters of the connecting pipes between the first rectangular pipe and the second rectangular pipe, between the second rectangular pipe and the third rectangular pipe and between the third rectangular pipe and the fourth rectangular pipe are sequentially reduced, and the water pressure is gradually reduced due to the reduction of the pipe diameters of the connecting pipes, so that the water pressure in the first rectangular pipe, the second rectangular pipe, the third rectangular pipe and the fourth rectangular pipe is also gradually reduced.

The application relates to the technical field of air conditioners, and discloses a baffle. The baffle provided by the application comprises a baffle body and flanges. The baffle body is an arc-shaped air deflector, the baffle body is installed in a shell of an air conditioner indoor unit, and the baffle body is used for guiding airflow. The flanges are two, the two flanges are arranged on the two sides of the baffle body in the length direction, the flanges are perpendicular to the baffle body, and the flanges are used for being close to adjacent elements to cut off the airflow on the two sides of the baffle body. The baffle is used for a reversing air supply air conditioner indoor unit, the baffle body can separate the inlet airflow and the outlet airflow, further, the flanges can better block the inlet airflow and the outlet airflow of the air conditioner indoor unit, so that the problems of airflow turbulence and turbulence on the two sides in the air conditioner indoor unit are avoided. The application further discloses an air conditioner indoor unit.

The present invention relates to the technical field of generator set equipment, and discloses a clustered arrangement structure of circulating water supply system buildings, including a cooling water circulation building group, the cooling water circulation building group includes a cooling tower, a water collection tank, a return ditch, a water absorption well and a circulating water pump room, a plurality of cooling towers are provided, and a plurality of cooling towers are connected in a straight line to form a cooling tower row, the cooling tower row is arranged on the water collection tank, and air inlets are provided on both sides of the cooling tower that are relatively distributed along the width direction of the cooling tower row, the water collection tank, the return ditch and the water absorption well are connected in sequence and the water flow direction remains unchanged, the circulating water pump room is located on one side of the length direction of the cooling tower row, the return ditch and the water absorption well are arranged in sequence between the cooling tower row and the circulating water pump room, a circulating water pump is provided in the circulating water pump room, and the water absorption port of the circulating water pump is connected to the water absorption well. The present invention has a reasonable layout, effectively reduces the occupied area without affecting the air intake cooling effect of the cooling tower, saves engineering investment, and maintains the stability of the water flow state in the system.

The utility model relates to the technical field of hot air generating furnace bodies, and discloses an efficient hot air generating furnace body, which includes a combustion chamber. A front-section prototype is fixedly connected to the left side of the combustion chamber, and a furnace neck is communicated and arranged on the left side of the front-section prototype. Through the design of the front-section prototype and the rear-section prototype ring of the combustion chamber in the utility model, the function of stabilizing the flow is achieved, thereby preventing the phenomenon of turbulent flow of hot air inside. Then, the silicon-aluminum coating applied to the combustion chamber has high heat resistance, which can effectively prevent oxidation and corrosion inside the combustion chamber at high temperatures. Then, through the ceramic coating applied to the surface of the combustion chamber, this coating can not only withstand high temperatures but also effectively insulate heat and prevent heat loss, thereby improving the combustion efficiency inside the combustion chamber. Then, the gas after combustion inside the combustion chamber will be discharged outwards through the hot air outlet, and all parts of this device use SUSS high-temperature resistant plates, so it has a long service life and is applicable to all occasions of hot air drying or heating.

The utility model provides a riding helmet noise reduction microphone which comprises a lower shell, a wind shielding structure is arranged on the bottom face of the lower shell and comprises a first wind shielding structure and two second wind shielding structures, the first wind shielding structure is arranged on the front side of the bottom face of the lower shell, and the two second wind shielding structures are arranged on the left side and the right side of the bottom face of the lower shell respectively. The two second wind shielding structures are respectively connected with the first wind shielding structure, the bottom surface of the lower shell, the inner wall of the first wind shielding structure and the two opposite inner walls of the two second wind shielding structures are matched to form a wind shielding space, and at least one pickup hole is formed in the bottom surface of the lower shell and located in the wind shielding space; and the upper shell is mounted on the top surface of the lower shell. According to the design, most airflow is guided to the periphery, direct impact on the pickup hole is reduced, and therefore the noise reduction capacity of the pickup hole is improved.

The reciprocating compressor silencer comprises a shell and a separator, the shell is provided with an air inlet and an air outlet, the separator is arranged in the shell and divides an inner cavity of the shell into an upper cavity and a lower cavity, the upper cavity is communicated with the air outlet, the lower cavity is communicated with the air inlet, and the air inlet is communicated with the air outlet. A plurality of reflecting rib plates are arranged on the inner wall of the top of the shell and divide the upper cavity into a plurality of cavities, an air inlet hole communicated with the upper cavity and the lower cavity is formed in the separator, the air inlet hole and the air outlet are located in the same cavity, and the side edges of the bottoms of the reflecting rib plates are obliquely arranged relative to the horizontal plane. The inclination angles of the bottom side edges of the multiple reflection rib plates are different, gaps are formed between the bottom side edges of the multiple reflection rib plates and the isolation piece, and the widths of the gaps between the multiple reflection rib plates and the isolation piece are different. The technical problem that an existing device cannot give consideration to improvement of the air suction efficiency and reduction of noise is solved, and the air suction efficiency and the noise reduction performance are improved.

The utility model discloses a sealing structure for preventing powder leakage, which belongs to the technical field of sealing structures and comprises a first pipeline and a second pipeline, a first flange plate is fixed at the right end of the first pipeline, and a second flange plate is fixedly connected at the left end of the second pipeline. The first flange plate and the second flange plate are connected through a plurality of bolts. According to the sealing structure for preventing powder leakage, a first pipeline and a second pipeline are in butt joint through a first flange plate and a second flange plate and are fixed through a plurality of bolts, meanwhile, a positioning block on a first protection ring is inserted into a positioning groove in a second protection ring, the positioning block extrudes an air storage bag, and then the air storage bag releases air; and released gas is conveyed to the sealing air bag through the gas conveying pipe, so that the sealing air bag expands and can fill the groove at the moment, and therefore the sealing performance of the connecting position of the first flange plate and the second flange plate is improved.

The invention discloses an LED outdoor lighting intelligent control device, and relates to the technical field of LED outdoor lighting, the LED outdoor lighting intelligent control device comprises a shell, the shell is rotatably connected with a frame body, the top of the shell is fixedly connected with a fixing ring, the outer side of the fixing ring is provided with a plurality of filter holes, the filter holes are uniformly distributed in the outer side of the fixing ring, and the filter holes are communicated with the fixing ring. A heat conducting plate is fixedly connected into the shell, the side edge of the heat conducting plate makes contact with the outer side of the motor, the bottom of the heat conducting plate makes contact with the outer side of the baffle, square grooves are formed in the top and the outer side of the heat conducting plate, limiting rings are fixedly connected into the square grooves, and partition plates are fixedly connected into the square grooves. According to the LED outdoor lighting intelligent control device, the fan is driven by the motor to rotate, a complete air convection channel is formed, flowing air can take away part of temperature on the lighting lamp, and therefore active heat dissipation is effectively conducted on the lighting lamp, the LED lamp is not prone to being heated and damaged, and the service life of the LED lamp is prolonged.

The utility model belongs to the technical field of cooling unit, concretely relates to a double -sided air -intaking circulating cooling unit for nuclear power station, including unit base and unit box, the unit box is barrel -shaped structure, and the opening side of unit box is connected with unit base buckle, and unit base is provided with the through -hole and forms the air outlet, the opposite sides wall of unit box is provided with the air inlet symmetrically, and the air inlet is covered with air -intaking treatment subassembly, the utility model discloses the design of unit box double -sided air -intaking makes filter, cooler two -sided air -intaking, can reduce the cross -sectional dimension of circulating cooling unit under the condition that total air -intaking area is invariable, thereby making circulating cooling unit can be arranged in the annular corridor of inside safety shell.

The utility model discloses a five-pointed star type high-temperature-resistant hydrogen sulfide-resistant screw pump sealing impact device, the main body structure of the five-pointed star type high-temperature-resistant hydrogen sulfide-resistant screw pump sealing impact device is a lower sealing occlusion ring and an upper sealing occlusion ring which are occluded up and down, and the five-pointed star type high-temperature-resistant hydrogen sulfide-resistant screw pump sealing impact device comprises the lower sealing occlusion ring and the upper sealing occlusion ring, a pentagram-shaped occlusion groove is formed in the bottom surface of the upper sealing occlusion ring, the pentagram-shaped occlusion groove and the pentagram-shaped occlusion convex teeth are mutually occluded and clamped, and newly synthesized difluoro vulcanized phenyl silicone rubber is adopted as a main body material. Through the arrangement of the lower sealing occlusion ring and the upper sealing occlusion ring, close fit of the lower sealing occlusion ring and the upper sealing occlusion ring can be achieved, the occlusion surface is of a five-pointed star-shaped three-dimensional structure distributed in the radial direction, the structure has good impact resistance and scouring resistance, the overall structure is simple in process, installation is convenient, the service life is long, and the service life is long. The stable sealing performance of the sealing device in a high-temperature and hydrogen sulfide environment is ensured, and medium leakage is prevented.

The utility model discloses an energy absorbing device and a vehicle and relates to the technical field of vehicles, the energy absorbing device comprises a front bumper, an anti-collision beam and an energy absorbing block, the anti-collision beam is provided with a first positioning unit, the energy absorbing block is provided with a second positioning unit and a positioning surface, the second positioning unit is connected with the first positioning unit, the positioning surface abuts against the anti-collision beam, and the first positioning unit is connected with the anti-collision beam. And an air guide space is formed in the top of the energy absorption block. According to the technical scheme, the structure of the energy absorption device can be improved so as to reduce damage to pedestrians when the vehicle collides with the pedestrians, damage to internal parts of the vehicle when the vehicle collides with the pedestrians can be reduced, the air inlet amount of the radiator can be increased, and the wind resistance coefficient can be reduced.

This utility model relates to the field of heat dissipation technology and discloses a wind-cooled heat dissipation device for ORC air-cooled low-temperature waste heat power generation, comprising: two symmetrically arranged frames, each frame having an upper header and a lower header fixedly installed, and the upper header and lower header being fixedly connected with a number of cross-distributed cooling pipes; an air guiding structure, which includes side baffles and fins, with cooling pipes penetrating the fins, and a side baffle fixedly installed on each opposite side. The medium is transported through the cross-distributed multiple cooling pipes, which can increase the air impact area and the flow of the medium, thereby improving the heat dissipation effect and efficiency. In conjunction with multiple fins and an upper air collection hood, the air is guided to ensure that each cooling pipe is fully impacted by the air for cooling. Compared with the existing technology of stacked cooling pipes, the cooling pipes in this solution are staggered and do not block each other, resulting in better heat dissipation. Combined with the downward flow of air, it is more in line with the fluid characteristics of hot air rising.

The utility model discloses an efficient flotation defoaming nozzle which comprises a body provided with a through channel, the body is provided with an inlet and an outlet, and the channel section area of the outlet is larger than that of the inlet; the penetrating channel comprises a first section and a second section, the first section is cylindrical, and the second section is in a circular truncated cone shape. The outlet cross section of the nozzle is designed to be larger than the inlet cross section, compared with an existing nozzle, an opposite design mode is adopted, the flow speed of outlet ore pulp is reduced, the pressure of the outlet ore pulp is increased, and the purpose of avoiding turbulent flow is achieved in a pressurizing and speed reducing mode on the premise that pressure supply is not changed. The flotation tank can scrape foam step by step, and the flotation efficiency is improved.

The application discloses a photovoltaic energy-saving curtain wall based on a renewable energy system and belongs to the technical field of photovoltaic energy-saving curtain walls, which comprises a longitudinal beam assembly installed on a building outer wall, a cross beam assembly vertically installed on the longitudinal beam assembly, and a positioning frame sealingly installed between the longitudinal beam assembly and the cross beam assembly; a folding photovoltaic power generation module is used to convert renewable solar energy into electric energy; the folding photovoltaic power generation module comprises a fixed strip plate fixedly installed in the center of the positioning frame, two groups of movable strip plates symmetrically installed in the positioning frame relative to the fixed strip plate, and two groups of photovoltaic plates arranged between the movable strip plates and the positioning frame and rotationally connected with each other; the photovoltaic energy-saving curtain wall can control the rotation and folding of the multiple groups of photovoltaic plates according to the needs of building ventilation, illumination and light energy conversion, and can synchronously drive the longitudinal movement of a cleaning flow guide module during the operation process, so that the surface of the photovoltaic plate can be automatically cleaned.

The embodiment of the invention relates to the technical field of semiconductor manufacturing, and discloses a cavity gas flow control method and control equipment in an attaching machine, a silicon wafer and the attaching machine. In the silicon wafer attaching process, the method comprises the steps that in the operation process of an attaching machine, a first draught fan filtering unit, a second draught fan filtering unit and a third draught fan filtering unit are turned on, so that a second cavity is in a micro-positive pressure state relative to a third cavity, and the second cavity is in a micro-positive pressure state relative to a first cavity; and a sixth fan filtering unit and a seventh fan filtering unit are closed, so that the condition of gas turbulence in the third cavity is avoided. By the adoption of the scheme, stable gas flow can be formed in the cavity in the attaching machine, gas turbulence is avoided, the cleanliness in the attaching machine can be improved, and the problem of shallow pits caused by particle attachment is solved.

The invention discloses and provides a sludge mixing, feeding and treating system which can adjust the water content of fed materials of a sludge incinerator by adjusting the proportion of added raw materials, also has crushing and stirring functions, can fully guarantee the uniformity of the fed materials of the sludge incinerator, and has the advantages of simple structure and high efficiency. The problems of large temperature fluctuation in the furnace, coking in the furnace and the like can be greatly reduced or even avoided, and the incineration efficiency and the incineration effect can be guaranteed. The main structure of the device comprises a dry sludge storage tank, a wet sludge storage tank, a sludge premixing and conveying device, a homogeneous mixing device and a sludge incinerator, dry sludge stirring blades are arranged in the dry sludge storage tank, wet sludge stirring blades are arranged in the wet sludge storage tank, and the sludge premixing and conveying device comprises a sludge conveying belt, a distribution pipe and a furrow plough. A plurality of material injection nozzles are arranged on the distribution pipe, the homogenizing and mixing device comprises a mixing outer cylinder and a mixing and stirring shaft, and a mixing and conveying spiral auger blade, a first-stage crushing fork, a second-stage crushing fork and a third-stage crushing fork are arranged on the mixing and stirring shaft.

The utility model relates to a pipe welding frame which comprises a collecting box used for collecting cooling water, a welding frame used for supporting a pipeline is arranged above the collecting box, and a shielding structure is arranged in the collecting box. The welding frame comprises a supporting column, a telescopic rod which slides and extends out of the supporting column, a wheel frame welded to one end of the telescopic rod and a supporting guide wheel rotationally installed outside the wheel frame. The shielding structure comprises a mounting base fixedly mounted on the upper surface of the collecting box, a shielding plate rotationally mounted on the mounting base, a servo motor fixedly mounted in the collecting box and a crank fixedly mounted on an output shaft of the servo motor. According to the pipe welding frame, through the use of the shielding structure, when the top of the collecting box can be shielded or opened and closed, residues generated during welding can be effectively prevented from entering the collecting box, when the shielding structure is opened, cooling water can be collected, and therefore the pipe welding frame has the advantages of being high in practicability, facilitating collection of the cooling water, preventing the cooling water from flowing disorderly and the like.

The embodiment of the invention discloses an unmanned aerial vehicle system and an unmanned aerial vehicle control method. The system comprises an unmanned aerial vehicle and a hangar. An air inlet channel and an air outlet channel are arranged in the hangar; an air outlet channel of the air inlet channel is arranged above a rotor arm parking position of the unmanned aerial vehicle when the unmanned aerial vehicle is parked in the hangar, and an air inlet of the air outlet channel is arranged below the rotor arm parking position when the unmanned aerial vehicle is parked in the hangar; the air inlet of the air inlet channel is communicated with the air outlet of the air outlet channel, or the air inlet of the air inlet channel and the air outlet of the air outlet channel are respectively communicated with the outside of the hangar; the air inlet channel and the air outlet channel are respectively used for introducing airflow to the upper part of the rotor wing arm when the unmanned aerial vehicle is started in the hangar, and guiding the airflow generated by the rotor wing arm out from the lower part of the rotor wing arm. According to the technical scheme provided by the invention, the unmanned aerial vehicle can enter a rotor wing starting state in advance in the hangar in cooperation with airflow distribution of the hangar, and stable starting of the unmanned aerial vehicle without stopping the vehicle is realized.

The invention discloses a raw coal dense medium cyclone, and relates to the technical field of coal mine coal dressing, the raw coal dense medium cyclone comprises a dense medium cyclone, a feeding pipe, a stirring piece and a flow guide piece, the dense medium cyclone is fixedly arranged on the ground, the feeding pipe is fixedly arranged on the dense medium cyclone and communicates with the dense medium cyclone, the stirring piece is rotationally arranged in the feeding pipe, and the flow guide piece is arranged on the stirring piece. The stirring piece can scatter agglomerated magnetic media, the flow guide piece is fixedly arranged in the feeding pipe, the flow guide piece is located under the stirring piece, and the flow guide piece can make heavy suspension liquid and raw coal enter the heavy medium cyclone in the tangential direction; the raw coal separation device has the effect of improving the separation precision when raw coal is subjected to separation treatment.