10results about How to "Reduce buoyancy" patented technology

The application belongs to the technical field of pile foundation construction, and discloses an underwater automatic pile cutting system and method for pile foundation construction, which comprises an automatic pile cutting control unit and an automatic pile cutting device; the automatic pile cutting control unit comprises an electrical control module, a sensing module, a rotary drive control module and a feeding drive module, which are arranged at different positions in the automatic pile cutting device; the automatic pile cutting device comprises a pile cutting working platform, a hoisting steel wire rope and a crane. The underwater automatic pile cutting which cannot be visually observed in pile foundation construction is realized through the cooperation of software and hardware, the sinking speed of the cutting device can be accurately measured and controlled in the sinking process of the automatic cutting device through the positioning rope of the crane, the stable operation is ensured, the cutting head of the rotary mechanism is equipped with four circular blades, the rotation speed and the feeding speed of the blades are controlled through a servo motor, and the cutting efficiency and quality of the automatic rotary cutting are ensured.

The utility model relates to a sightseeing bamboo raft fixing structure, and belongs to the field of sightseeing bamboo rafts. Comprising a plurality of bamboo raft pipe fittings, a plurality of fixing mechanisms, a seat fixing mechanism and a sunshade mechanism, the bamboo raft pipe fittings are arranged side by side at intervals, the fixing mechanisms are fixedly installed on the bamboo raft pipe fittings and connect the bamboo raft pipe fittings, the seat fixing mechanism is fixedly installed on the bamboo raft pipe fittings, the bottom end of the sunshade mechanism is fixedly connected with the seat fixing mechanism, and the sunshade mechanism covers the top end of the seat fixing mechanism. The seat fixing mechanism not only reinforces the bamboo raft pipe fitting, but also provides a seat function, in addition, a fixed connecting point can be provided for fixed installation of the sunshade mechanism, and the situation that the bamboo raft pipe fitting is damaged due to the fact that the sunshade mechanism is directly and fixedly installed on the bamboo raft pipe fitting is avoided; according to the utility model, the seat and the sunshade mechanism can be mounted and fixed without shielding a hollow bamboo model, so that the dead weight of the bamboo raft is reduced, and the experience feeling of tourists on the bamboo raft is enhanced.

The utility model relates to the technical field of pile foundation engineering, and particularly discloses a device for improving the anti-pulling performance of a large-diameter non-soil-squeezing pipe pile, which comprises a pipe pile, a pile clamping device, a pile shoe, a pile bottom rock-socketed layer, a core drilling machine, a concrete pump truck, a water-bearing layer, a hard soil layer and a soft soil layer, a concrete conveying pump is installed at one end of the concrete pump truck, steel fiber concrete is injected into the upper surface of the pile bottom rock-embedded layer, and a vacuum pump is arranged outside the pipe pile. According to the device for improving the anti-pulling performance of the large-diameter non-soil-squeezing tubular pile, a circle of open reinforcement cage is arranged at the pile bottom, and the reinforcement cage and the pile bottom are connected into a whole after steel fiber reinforced concrete is used for sealing the bottom, so that the mechanical occlusal force and cohesive force between a pile body and pile bottom foundation soil can be enhanced, and the anti-pulling performance of the large-diameter non-soil-squeezing tubular pile is improved; the load is better transmitted to a deep solid rock stratum to improve the pulling resistance of the pile, and the pulling resistance of the pile is improved by discharging water around the pile in a water-bearing layer, lowering the underground water level and reducing the buoyancy force in a disguised mode.

This application relates to the field of filtration devices, specifically disclosing an improved oil removal device for electroplating wastewater. The device includes a housing with a suction pipe connected to it. A float is mounted at one end of the suction pipe, and a fixed pipe is mounted on the float, connected to the suction pipe. Three rotating plates are evenly spaced and rotatably arranged along the circumference of the fixed pipe, with the rotation axis of the rotating plates parallel to the height of the fixed pipe. A supporting float is located at the end of the rotating plate away from the fixed pipe. Three adjusting floats are evenly spaced along the circumference of the fixed pipe, corresponding one-to-one with the three supporting floats. The float is equipped with a rotating assembly for driving the supporting floats and a balancing assembly for inflating / deflating the adjusting floats. A driving component for moving the float is also provided on the float. This application effectively removes floating oil stains located in corners and edges, improving oil removal efficiency.

This invention relates to the field of mineral processing technology, and particularly to a depressant for molybdenum sulfide ore and a flotation separation method and application for copper-molybdenum sulfide minerals. The depressant comprises polyphenols; the polyphenols have the molecular formula C0.05. 32 H 30 O 11 The molecular weight is 590.57 g / mol, and the degree of polymerization is 2-11. The molybdenum sulfide mineral depressant is used for the flotation of copper-molybdenum sulfide minerals. The copper-molybdenum sulfide minerals contain chalcopyrite and molybdenite, with a mass ratio of 1-2:1. This invention provides a molybdenum sulfide mineral depressant and a flotation separation method and application for copper-molybdenum sulfide minerals. The aim is to solve the problems of high toxicity, high loss rate, and high intermingling of existing copper-molybdenum sulfide mineral separation flotation depressants, and to achieve effective separation of chalcopyrite and molybdenite.

The application discloses a foldable water area rescue floating stretcher and relates to the technical field of rescue equipment. The foldable water area rescue floating stretcher comprises a main rod, two support plates, two groups of support assemblies, a folding adjusting assembly, an inflatable float and a safety belt. The two support plates are hingedly connected to the two sides of the main rod through hinges and can rotate around the long axis of the main rod to realize folding or unfolding. Each group of support assemblies comprises a supporting leg, a horizontal rod, a propeller assembly and a universal wheel arranged on the two sides of the horizontal rod. The folding adjusting assembly is arranged between the supporting leg and the support plate and is used for supporting locking when unfolding and limiting when folding. The inflatable float is arranged at the bottom of each support plate. The safety belt is arranged at the corresponding position of the edge of the support plate. The foldable water area rescue floating stretcher has the functions of land pushing, water floating and active propulsion, has a small volume after folding, can be quickly unfolded, is suitable for water area rescue in floods, near seas and the like, effectively reduces physical consumption of rescuers and improves rescue efficiency.

The application discloses a foundation protection method on a karst underground river in a low-lying area around a reservoir, and the method can reduce the pressure head of the karst confined water in the field area, reduce the floating force of the clay layer on the top of the karst underground river, and avoid the damage of the foundation caused by the sudden gushing of the karst underground river; when the reservoir water level suddenly drops, the underground water level in the karst underground river system suddenly drops, and at this time, a part of the karst cave under the foundation is in a vacuum state, causing the engineering geological problems of ground karst collapse and uneven settlement of the foundation; at this time, the air supplied through the pressure relief well can solve the above engineering geological problems.

The invention discloses a machine-column combined copper-nickel rough concentrate regrinding and sorting method for copper-nickel sulfide ore. The method comprises the following steps that S1, first-stage ore grinding is conducted, specifically, raw ore is subjected to first-stage ore grinding and grading; s2, first-stage roughing, wherein water is added into a raw ore product obtained after first-stage grinding and grading in a stirring tank for size mixing; s3, rough concentrate regrinding is conducted, specifically, concentrate obtained after first-stage roughing is conveyed to a regrinding ball mill grading cyclone to be graded; s4, finely selecting the first four tanks in one section once; s5, performing one-section and one-time fine selection for six grooves; s6, first-stage secondary fine selection; s7, one-stage and one-time fine scavenging; s8, second-stage ore grinding; s9, second-stage roughing is conducted; s10, first four tanks are finely selected for the first time in the second section; s11, carrying out second-section primary fine selection on the rear 6 tanks; s12, carrying out second-stage secondary fine selection; s13, second-stage primary fine scavenging is carried out; s14, second-section primary flotation column fine selection is carried out; s15, two-stage primary scavenging is carried out; s16, second-stage secondary scavenging is carried out; and S17, second-section secondary flotation column fine selection is carried out.

The utility model discloses a water conservancy monitoring equipment for water conservancy engineering relates to water conservancy engineering technical field, including monitoring box, the monitoring box bottom fixedly connected with the buoy, the buoy inside fixedly connected with the baffle, the baffle divides the buoy and is distributed with the high pressure gas cavity and the counterweight chamber of high and low, the baffle top fixedly connected with the multisection electric push rod, multisection electric push rod piston rod end fixedly connected with the push board, through installing the buoy on the monitoring box bottom, when needing equipment to sink to the water bottom, just can be in the water suction into the counterweight chamber when lowering equipment buoyancy also increase counterweight, make it can sink to the water bottom quickly, when needing to float the salvage equipment, just need to discharge the water in the counterweight chamber, and the high pressure air in the high pressure gas cavity is introduced into the counterweight chamber inside and annular airbag inside can make the equipment whole buoyancy increase quickly, and then make the equipment can float quickly and be convenient for salvage, overall use is very convenient.

This invention relates to the field of wastewater treatment, and more particularly to an industrial wastewater recovery device, comprising a flotation tank. Two plate shafts are symmetrically and rotatably mounted in the middle of the inner side of the flotation tank. Three bubble-pushing plates are fixedly mounted in a circular array on the outer surface of the plate shafts. Two jet pipes are symmetrically and fixedly mounted at the bottom inner side of the flotation tank. The plate shafts are located above the jet pipes. A fixing seat is provided on the side of the plate shafts. Both ends of the fixing seat are fixed to the inner wall of the flotation tank. A fan-shaped shell is connected to one side of the fixing seat. The upper and lower ends of the fan-shaped shell are open. One of the bubble-pushing plates extends into the interior of the fan-shaped shell. A microporous plate covers the upper end of the fan-shaped shell. This invention increases the probability of collision between bubbles and oil droplets in the wastewater, improves the oil droplet flotation effect, and thus improves the wastewater treatment effect. Simultaneously, it avoids the bubble-pushing plates being obstructed by the microporous plate, ensuring that the bubbles are smoothly propelled.