64results about How to "Reduce buoyancy" patented technology

The utility model relates to the technical field of sediment measurement, in particular to a pile bottom sediment measuring device which comprises a protective frame and a balancing weight, the bottom end of the protective frame is fixedly connected with a supporting base, the surface of the balancing weight is fixedly connected with a measuring line, and one end, away from the balancing weight, of the measuring line is fixedly connected with a pull rope. The outer surface of the measuring line is fixedly connected with a limiting block, and the bottom end of the balancing weight is movably connected with a rotating ball. Under the action of the control panel, the action size of the torsion spring is controlled, the buoyancy of overall descending of the equipment is reduced, the influence of the buoyancy on the descending state of the protection frame is avoided, under the connection of the placement bin and the counterweight balls, the effect of regulating and controlling the action weight of the counterweight block is achieved through the change of the number of the counterweight balls, and the use performance and effect of the counterweight block are improved; and under the cooperative use of the limiting block and the limiting block, the control of the sliding direction of the measuring line on the protection frame is realized, and the measurement and use effect on the sediment thickness is achieved.

The invention relates to the technical field of water quality monitoring, in particular to a fluorine ion monitoring device applied to pasturing area water quality. The existing equipment is difficult to clean floccules on a filter screen, so that the filter screen is not good enough in filtering effect on well water, the accuracy of a detection result of a detector on fluorine ions in the well water is reduced, and the detector is difficult to accurately detect underground water at various depths due to the fact that the water levels of the well water are different at different times. A fluorine ion monitoring device applied to water quality in a pasturing area comprises a mounting frame, a protective shell and the like, a protective shell is fixedly connected to the top of the mounting frame. Bristles of the cleaning frame can clean the filter plate; the extrusion block moves upwards to discharge the well water in the detection rod, and the discharged well water backflushes the filter plate, so that the filter plate is cleaner, the clean filter plate can better purify the well water, and the detection accuracy of the detector on the well water is further improved.

The present invention discloses a screw drill with a multifunctional bypass valve, comprising a motor assembly, a universal shaft assembly and a transmission shaft assembly which are detachably installed in sequence, and a bypass valve assembly installed above the motor assembly, wherein the hydraulic valve has two telescopic valve plugs penetrating the housing, and a hydraulic flow channel which drives the two telescopic valve plugs to move relative to each other by hydraulic pressure, and drives the opening and closing of the hydraulic valve when the internal and external hydraulic pressure difference of the bypass valve assembly changes. In the present invention, a combination of a movable valve core and a hydraulic valve is adopted, and the working environment of the screw drill can be judged by itself and corresponding judgments and actions can be made, which effectively reduces the problem that the types of faults that are difficult to detect and the corresponding remedial and anti-damage measures are not easy to make when the screw drill is operating underground.

The utility model relates to the technical field of sonar detection equipment, in particular to a seabed sonar detection device, which comprises two hemispherical shells, the two hemispherical shells are hermetically connected through bolts, a base is fixed at the bottom end of one of the hemispherical shells, a sonar detection assembly is mounted on the base, and the sonar detection assembly is connected with the two hemispherical shells through bolts. A cover plate is fixed to the top ends of the two hemispherical shells, a connecting assembly is fixed to the top end of the cover plate, inner cavities are formed in the inner sides of the hemispherical shells, communicated side cavities are formed in the side edges of the two hemispherical shells, and liquid guide pipes extending to the outer portions of the hemispherical shells are fixed to the bottom ends of the side cavities. The whole device is subjected to pressure relief and exhaust work, the overall buoyancy of the device is reduced, the speed is higher when the device falls to a deep sea area, seawater is discharged outwards from a liquid guide pipe through a liquid discharging assembly after detection of a sonar detection assembly is completed, the overall buoyancy of the device is increased, and the device can be conveniently and rapidly taken back for next putting work.

The utility model discloses a portable water quality detection structure for environmental monitoring, which belongs to the technical field of water quality detection and is characterized by comprising an air bag, a support is fixedly connected to the outer side of the air bag, a tying rope is arranged at the bottom of the support, a detection component is arranged on the outer side of the tying rope, and the detection component is connected with the air bag. The detection assembly is used for detecting the water quality, during detection, the pressure difference inside and outside the ballast chamber can be adjusted by adjusting the position of the piston piece in the ballast chamber, water in the detection environment is extracted from the circulating groove, when the water amount in the ballast chamber is increased, the overall weight is increased, and therefore buoyancy is reduced, and at the moment, sinking occurs; therefore, water quality conditions at different depths can be monitored through an electrochemical sensor, water can be discharged out of a ballast chamber when a piston piece is pushed downwards along the ballast chamber so as to reduce the weight and improve the buoyancy to enable the whole detection assembly to move upwards, and the structure is limited through a limiting assembly in the moving process.

The invention provides a multi-depth sampling device for water detection, and belongs to the technical field of water detection, the multi-depth sampling device comprises a sampling frame, a plurality of sampling seats are slidably arranged in the sampling frame, annular cavities are formed in the sampling seats, and an opening and closing mechanism is arranged in each sampling seat; when the depth needing to be sampled is positioned, a plurality of groups of limiting plates can be pushed to retract into a plurality of sampling seats respectively, and the sampling seats are pulled to move to the required sampling depth respectively, so that the sampling seats can be positioned respectively under the cooperation of a limiting assembly, and the effect of positioning the sampling depth is achieved; the sampling limitation is effectively reduced, the requirements of different sampling points can be met, the time and labor cost in the sampling process is reduced, meanwhile, interference of suspended solids, algae and the like in the upper-layer water body in the sampling process can be avoided, and it is ensured that the collected water sample can truly reflect the water quality condition of a target water layer.

The invention relates to the technical field of robot communication control, in particular to a recoverable buoy system for a modular underwater robot and a control method.The buoy comprises a shell, a communication module and an acquisition module, and an adjusting module comprises a buoyancy adjusting mechanism and a gravity center adjusting mechanism; the buoyancy adjusting mechanism adjusts the action of an electromagnetic valve according to the buoy depth to realize buoyancy adjustment, and the gravity center adjusting mechanism adjusts the gravity center position according to a preset gravity center position and a gravity center adjusting curve; the power module comprises a first power set and a second power set. The control module is used for determining the adjusting mode of the buoyancy adjusting mechanism, the adjusting mode of the gravity center adjusting mechanism and the adjusting mode of the power module. And the power supply module realizes effective positioning and flexible release and recovery of the buoy, and promotes the same-speed cooperative movement and real-time communication of the buoy and the underwater robot.

The present invention discloses an autonomous underwater robot for aquaculture, which comprises: an upper cabin body located at the top and two lower cabin bodies located at the bottom, all of which are connected by a T-shaped bracket so that the three are parallel to each other and arranged in a herringbone shape; the top of the T-shaped bracket is connected to the upper cabin body, and the two sides of the bottom thereof are respectively connected to the two lower cabin bodies; the upper cabin body comprises a lighting module, a buoyancy adjustment module, a vertical thruster module, an electric control module, and a stern of the upper cabin body connected in sequence from front to back; a video image acquisition module is installed above the T-shaped bracket for shooting water surface or underwater images. The stern of the upper cabin body is towed and connected to a surface communication buoy by a coaxial watertight cable; a variety of sensors are installed on the T-shaped bracket. After diving and landing on the bottom, the "herringbone"-shaped structure can maintain stable support; when the present invention is recovered to land, the "herringbone"-shaped structure does not require a special bracket and can also be stably placed.

The present invention relates to the technical field of inflatable rafts, and discloses an adaptive buoyancy regulating device for an inflatable raft, including an exhaust intensity control mechanism and an intake speed control mechanism, wherein a second longitudinal shell fixedly mounted on the upper surface of a side raft and having a hollow structure inside is provided inside the second longitudinal shell, a conical moving block placed inside the second longitudinal shell and controlling the gas flow speed by controlling the gap between the second longitudinal shell and the inner wall, and a longitudinal threaded rod capable of driving the conical moving block to move longitudinally. The adaptive buoyancy regulating device for an inflatable raft is symmetrically mounted on the sides of two wing rafts, and when the raft body of the inflatable raft moves too fast, seawater can be poured into the inside of the side raft shell, thereby reducing the buoyancy of the side raft, and then reducing the buoyancy of the entire inflatable raft, so as to improve the stability of the inflatable raft, thereby adaptively controlling its buoyancy according to the movement speed of the inflatable raft, and improving the safety of the inflatable raft during operation.

The invention provides a falling type leakage cut-off device and application, the falling type leakage cut-off device comprises a pipe wall, a buoyancy plugging piece and a base, and the buoyancy plugging piece is arranged at the top of the pipe wall and slides up and down along the inner wall of the pipe wall; the base is arranged at the bottom of the pipe wall, the base is tightly attached to the buoyancy plugging piece during working, it can be guaranteed that when a medium leaks, due to the fact that the buoyancy obtained by the buoyancy plugging piece is reduced, the buoyancy plugging piece moves downwards to press the sealing face of the base, and then leakage of the downstream medium is cut off; and plugging during pipeline leakage is guaranteed, and the medium leakage rate and the personnel injury risk are reduced in time.

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.