404 results about "Water entry" patented technology

The utility model discloses a tooth washing device with an automatic water injection function and a water outlet device, which comprise a handheld tooth washing device and a base, the tooth washing device is provided with a water storage tank, and the tooth washing device is arranged on the base in a removable manner; the water inlet mechanism is connected with the circuit board; a water passing hole is formed in the bottom of the water storage tank, a water stop piece is installed at the water passing hole, and the water stop piece opens the water passing hole when the oral irrigator is arranged on the base and closes the water passing hole when the oral irrigator is lifted; when the water passing hole is opened, the water passing hole is communicated with the water inlet end of the water inlet mechanism, so that water is injected into the water storage tank when the water inlet mechanism is opened. The water storage tank has an automatic water injection function, so that manual water injection of a user is avoided, the user can use the water storage tank more conveniently, and the problem that the water storage tank is difficult to be filled with water can be solved.

The invention relates to the technical field of valve detection, and discloses a multifunctional valve testing device and a use method.The multifunctional valve testing device comprises a water tank and a base installed in the middle of the water tank through two platforms, the two platforms are located in the middle of the front side and the middle of the rear side of the base respectively, and the base is provided with annular rails; the annular track is provided with a plurality of sets of fixing bases distributed at equal intervals, the annular track drives the multiple fixing bases to conduct fixed-distance conveying, the fixing bases circularly move around the end face of the base, and the positions of the fixing bases are switched in a reciprocating mode. The annular track can drive the fixed base to conduct fixed-distance conveying, so that the position of the workbench and the position of the multifunctional valve on the workbench can be automatically switched according to a set program. In the testing process, the valve can sequentially pass through a plurality of stations such as air inflation, water entry vibration, bubble detection and air pressure re-detection, the valve does not need to be manually and frequently carried, the testing efficiency is greatly improved, meanwhile, the detection time is prolonged, and the detection result is improved.

The invention discloses a test device and method for high-speed icebreaking water entry of a structure, and belongs to the technical field of structure cross-medium launching tests. According to the invention, different sizes of floating ice are prepared by using different sizes of ice making molds, the floating ice is arranged on the water surface, and the water entry speed and angle of a structure can be accurately controlled by using a cross-medium launching device. The motion process of the structure is recorded through the high-speed photographing device, multi-physical-field data are obtained by combining the chamber opening speed measuring device, and the high-speed icebreaking water inlet flow field change of the structure and the motion stability of the structure are comprehensively analyzed. The method has high test precision and repeatability, meets the requirements of multi-working-condition water entry tests, and can provide important test support for high-speed icebreaking water entry research of structures.

The utility model relates to the technical field of fish enhancement and release facilities, in particular to a simulated ecological fish fry wild training fishway which comprises a reservoir, a water supply part, a water return part, a fishway pond body and a water inlet fishway. The water supply part is used for supplying water of a water body to the reservoir; one end of the fishway pond body is communicated with the reservoir through a water discharge valve, and the other end of the fishway pond body is communicated with a water body through a water inlet fishway; a water retaining gate is arranged on the water entry fishway; a first rest pool, a second rest pool and a third rest pool are arranged in the fishway pool body; a plurality of barbaric stone ridges are arranged on the fishway pool body; and at least two water retaining ridges are further included. Aiming at the technical problem that the fish fries are low in releasing survival rate, the fishway pool is closer to the field habitat characteristics of released fishes, the capability of the fish fries to adapt to natural water bodies can be exercised by adjusting the flow and the flow speed in the fishway pool body, the requirement of fish wild training is met, and the requirement of partitioned culture in the fishway pool body can also be met at the same time.

The invention relates to a self-adaptive energy-absorbing conformal head cap of an air-water cross-medium aircraft, which is mainly applied to aircrafts capable of switching motion between two media of air and water. The head cap comprises a top cover, a skin combination, an energy absorption mechanism, a shape preserving mechanism and a modular adaptive interface, wherein the skin combination comprises an outer-layer skin and an inner-layer skin; the energy absorption mechanism is arranged in the inner-layer skin; the conformal structure is arranged between the inner-layer skin and the outer-layer skin; the modular adaptive interface comprises a base and a switching section, the base is connected with one end of the inner-layer skin, and the switching section is connected with the aircraft body; and the top cover is connected with the other end of the inner-layer skin. Stable hydrodynamic performance and low underwater resistance can be provided under different water entry speeds and angles, head appearance damage caused in the deformation process of a traditional energy absorption structure is effectively avoided, and the key technical problems in design of the air-water cross-medium aircraft are solved.

The invention discloses a device and method for testing the cross-medium water entry of a navigation body under the wave condition, and relates to the technical field of missile body water entry testing equipment.The device for testing the cross-medium water entry of the navigation body under the wave condition comprises an experimental water tank, and a wave maker is arranged in the experimental water tank; the adjusting module comprises a launching platform capable of adjusting the inclination angle; the emission module comprises an emitter and a driving source, the emitter is arranged on the emission platform, the driving source is in butt joint with one end of the emitter, the other end of the emitter is provided with a rectification structure, and high-pressure gas provided by the driving source enables a carbon body loaded on the emitter to be released at a certain initial speed; the rectification structure is used for reducing interference generated by gas turbulence in the radial direction of the launcher when the projectile body leaves the launcher. According to the invention, a stable wave page is generated through the cooperation of the motion phases of the two wave generators, the process that a projectile body enters water under a real sea condition is simulated, and more accurate experimental data is provided for the design and optimization of a cross-medium motion body.

The present invention relates to the technical field of water treatment methods, and specifically discloses a method for treating geothermal water in a medium-deep non-interference geothermal system and a geothermal water treatment device. The method comprises: 1) inputting the first inlet water into the inlet of a geothermal well; 2) inputting the second inlet water into the inlet of the geothermal well and simultaneously driving the first round of geothermal water in the geothermal well to be output from the outlet through a first driving mode to form the first outlet water; 3) adding dispersed substances into the first outlet water to form the third inlet water, wherein the dispersed substance concentration in the third inlet water is greater than the dispersed substance concentration in the second round of geothermal water; 4) inputting the third inlet water into the inlet of the geothermal well and simultaneously driving the second round of geothermal water in the geothermal well to be output from the outlet through a first driving mode to form the second outlet water; 5) repeating the above steps 3-4) until the geothermal water retained in the geothermal well becomes the Nth round of geothermal water. The technical problem of mechanical energy consumption of geothermal water lifted from underground to the ground by a pump can be solved.

The invention provides a continuous bomb dropping device and a continuous water entry test device and method for a bomb body in a decompression environment, and belongs to the technical field of cross-medium water entry test devices. In the continuous bomb dropping device, a moving sliding table is fixedly arranged on a support, a bomb body releasing structure comprises a supporting shell, a rotating wheel and a driving piece, the supporting shell is connected with the moving sliding table, the moving sliding table can drive the bomb body releasing structure to move in the vertical direction, the rotating wheel is rotationally arranged on the supporting shell, and the driving piece is fixedly arranged on the supporting shell and connected with the rotating wheel. The driving part can drive the rotating wheel to rotate, the rotating wheel is provided with a plurality of projectile body containing cavities, the multiple projectile body containing cavities are arranged at intervals in the circumferential direction of the rotating wheel, a projectile outlet is formed in the lower portion of the supporting shell, and the projectile outlet is configured in the mode that when the projectile body containing cavities communicate with the projectile outlet, projectile bodies in the projectile body containing cavities are separated from the projectile body containing cavities and penetrate through the projectile outlet. And after one-time pressure reduction is conducted on the pressure reduction tank, continuous controllable release of the multiple projectile bodies entering water is achieved.

The invention provides a launching mechanism and an inclined water entry impact test system. The launching mechanism comprises a launching device, a test structure body and a launching frame, the launching frame comprises an erecting frame, a baffle and a sliding frame, the baffle is arranged at one end of the erecting frame, an opening is formed in the other end of the erecting frame, the launching device is installed on the sliding frame, the sliding frame is arranged on the erecting frame in a sliding mode, and the test structure body is arranged on the sliding frame. The end, away from the launching port, of the launching device is connected with the baffle through a first energy absorber, one end of the sliding frame is connected with the erecting frame through a second energy absorber, and the other end of the sliding frame is connected with the erecting frame through a third energy absorber. The launching mechanism generates recoil resistance through the first energy absorber, the second energy absorber and the third energy absorber. Ejection power is provided for the test structural body through the multiple phase change pipes, high-speed water entry of the test structural body can be achieved, appropriate damping parameters are matched for different load test structural bodies, and recoil in the launching process is buffered and eliminated.

The invention relates to a supercavitation navigation body small-angle water outlet scale model test device and method, and the device comprises a power system, a platform height lifting system, an initial water outlet angle adjustment system, a water surface evacuation system, a wave generation system, a line target speed measurement system, and a model recovery system, and the power system is used for launching a navigation body model; the platform height lifting system is used for adjusting the height; the initial water outlet angle adjusting system is matched with the platform height lifting system to adjust the initial water inlet angle of the navigation body model; the water surface vacuumizing system is used for vacuumizing the water tank; the wave making system is used for making a wave water surface; the line target speed measurement system is used for measuring the speed of the navigation body model; the model recovery system is used for recovering the navigation body model. According to the invention, the depth adjustment of the initial water depth and the angle adjustment of the preset water outlet angle are realized when the navigation body moves underwater, the simulation of wave sea conditions can be realized, and the physical phenomena such as supercavitation form and trajectory instability of a cross-domain gas-water interface in the underwater movement process of the navigation body can be recorded.

To make it possible to more accurately determine a consumption state of a sacrificial anode.SOLUTION: There is provided a sacrificial anode structure, including: a sacrificial anode 11; a waterproof container 14 which is a hollow container in which at least the part of a body is embedded in the inside of the sacrificial anode 11 and which is constituted so that water does not enter from other places than a through-hole 21 opened at a predetermined position of the body; and a water entry sensor 15 arranged inside the waterproof container 14; wherein the through-hole 21 is provided at a position where the through-hole is embedded in the sacrificial anode 11 and where the through-hole starts to be exposed from a dissolution surface of the sacrificial anode 11 when a consumption amount of the sacrificial anode 11 reaches a desired amount. Thus, when the consumption amount of the sacrificial anode 11 reaches a desired amount, water enters the inside of the waterproof container 14 from the through-hole 21, and by detecting the water entry by the water entry sensor 15, it is possible to grasp that the consumption amount of the sacrificial anode 11 reaches the desired amount.SELECTED DRAWING: Figure 1

The invention relates to a drainage device for hydraulic engineering construction, which comprises a vehicle body, a storage part connected to the vehicle body and a water inlet port connected to the storage part, the vehicle body is connected with a water suction pump, the water suction pump is connected with the water inlet port, and the water inlet port is used for pumping water; the storage part comprises a sliding part and an unfolding part connected to the sliding part, the water inlet port is connected to the unfolding part, and the unfolding part is used for lowering the water inlet port into water or moving the water inlet port to the recovery position so that the water inlet port can be stored on the vehicle body. The technical scheme has the beneficial technical effects that through the linkage design of the sliding part and the unfolding part, the water inlet port can be rapidly lowered and recycled underwater. Drainage operation can be completed only by operating the vehicle body, and construction efficiency is remarkably improved. The telescopic or folding structure of the unfolding piece can adjust the water entry depth of the water inlet port to adapt to different water level conditions, and the problem of drainage interruption caused by water level fluctuation is avoided.

The invention discloses a step-shaped pool design method suitable for a cone-head projectile body inclined water entry test, which comprises the following steps: selecting a plurality of typical water entry conditions to carry out projectile body water entry fluid-solid coupling numerical simulation calculation according to a projectile body water entry test speed range and an inclination angle range; according to the calculated underwater motion trail of the projectile body, converting the underwater motion trail into a motion trail under a global coordinate system; extracting the maximum horizontal displacement and the water entry depth of the projectile body under each water entry condition under the global coordinate system, and calculating to obtain the initial position coordinates of the corresponding step-shaped pool steps by combining with a certain margin; calculating the overall structure size of the whole pool according to the obtained initial position coordinates of each step; according to the ladder-shaped pool, the actual volume of the pool is reduced, so that the water injection time in the test is shortened, water in the whole pool does not need to be drained when the projectile body is recycled, and water only needs to be pumped to the corresponding steps where the projectile body moves; and the projectile body can be ensured not to collide with the wall surface of a pool in the water entering deflection process.

The utility model discloses a water conservancy tower type trash remover capable of accurately positioning, which comprises a supporting device, and a fishing device is arranged on one side of the supporting device; the fishing device comprises a lifting frame, a traction rope is arranged at the top of the lifting frame, a hydraulic cylinder is installed in the middle of the lifting frame, four opening and closing strips are evenly and rotationally arranged on the circumference of the bottom of the lifting frame, a fishing net is arranged between the opening and closing strips, and opening and closing ropes are arranged on the inner sides of the opening and closing strips. The opening and closing rope is connected with the output end of the hydraulic cylinder; according to the water conservancy tower type trash remover capable of achieving accurate positioning, the hydraulic cylinder drives the salvage net to be opened underwater, the salvage device can enter water rapidly, water entering resistance is reduced, meanwhile, the opened salvage net can salvage out a large amount of dirt at a time, and the trash removing effect is improved; through the design that the pulling rope, the opening and closing rope and the fishing net are matched for fishing, the device is low in manufacturing cost, simple in structure, easy to maintain and high in operation reliability.

A fountain lamp with a water entry sensing and disinfection device, includes a housing, a lighting component, a pumping component, a water entry sensing device, and a control component. The housing is provided in an upper part with a closed floating chamber and a water outlet channel passing through the floating chamber. The water outlet channel is provided with water spray holes at an upper end. The lighting component is disposed within the floating chamber and configured for projecting light to form a column of light. The pumping component is connected to the housing and at least partially provided at a lower part of the floating chamber, the pumping component is in communication with the water outlet channel. The water entry sensing device is installed inside the housing. The control component is electrically connected to the water entry sensing device and the pumping component.

The utility model discloses automatic temperature control equipment for a die-casting die, which is characterized in that a water inlet mechanism is arranged inside a box body and comprises a water inlet main pipeline and a plurality of water inlet branch pipelines communicated with the water inlet main pipeline, and the water inlet branch pipelines are respectively communicated with a plurality of water inlet pipes of a cooling channel in a fixed die or a movable die; the water return mechanism is arranged in the box body and located on one side of the water inlet mechanism, and comprises a plurality of water return branch pipelines and a water return main pipeline communicated with the water return branch pipelines, and the water return branch pipelines are respectively communicated with the plurality of water outlet pipes of the cooling channel in the fixed mold or the movable mold; the temperature adjusting mechanism comprises a flow servo valve, a temperature sensor, a touch screen and a PLC and is used for adjusting the flow of cooling water entering the mold according to temperature information fed back by the temperature sensor. According to the automatic temperature control equipment for the die-casting die, the temperature can be reduced according to the condition of each position of a part, and the solidification time difference of each part of the die-casting part is shortened, so that the shrinkage porosity of a casting is avoided or reduced.

Disclosed is a valve apparatus having a first pressure compensation valve, a first, gas-tight, cap-like membrane device, and a gas-permeable, moisture-permeable, and yet water-impermeable second membrane device. The first pressure compensation valve, in particular a back-pressure valve, having a first valve housing, which limits a pressure compensation opening and comprising a housing side and a covering side, comprising or consisting of a first, gas-tight, cap-like membrane device covering a first pressure compensation opening and releasing the first pressure compensation opening from a predetermined negative pressure prevailing on the housing side in order to enable a pressure compensation between a housing device and an environment, and a gas-permeable, moisture-permeable, and yet water-impermeable second membrane device arranged on the covering side and in series to the first membrane device, covering a second pressure compensation opening and preventing water entry into the valve housing and thus into a housing device.

The invention relates to a ship bow structure oblique water entry slamming experiment device, which comprises a water tank, a portal frame, an ejection assembly and a connecting assembly, and is characterized in that the portal frame is arranged across the water tank; the ejection assembly comprises a lifting table, an ejection vehicle and a lifting part, the lifting part is installed on the portal frame, the output end of the lifting part is connected with the lifting table and used for driving the lifting table to move in the vertical direction, and the ejection vehicle is slidably connected with the lifting table in the direction close to or away from the water pool; the ship bow can be connected with or separated from the catapult vehicle through the connecting assembly. The height of the lifting platform can be adjusted to control the water entry height of the ship bow, the advancing speed of the catapult vehicle can be adjusted to control the horizontal initial speed of the ship bow when the ship bow enters water, rapid connection and separation between the catapult vehicle and the ship bow can be achieved through the arranged connecting assembly, and the experiment device can effectively control the water entry height and the horizontal initial speed of the ship bow when the ship bow enters water. The influence of different water entry parameters on slamming is explored, the actual slamming environment of the ship bow can be accurately simulated, and experimental data are more accurate.

The invention relates to the technical field of computational fluid mechanics, and discloses a wedge-shaped body water entry slamming BEM-SPH coupling numerical method based on an overlapping computational domain idea. According to a specific simulation problem, a corresponding numerical model is established, a water entry slamming BEM model under a full nonlinear boundary condition is adopted to calculate a slamming load in the initial water entry process of the wedge, after high-amplitude transient slamming force capture is completed, internal flow field distribution and control point transmission speed are obtained according to speed potential and free liquid level elevation calculated by the BEM, and the initial water entry process of the wedge is completed. And an SPH calculation model is initialized by taking the result as input, so that wedge-shaped body motion attitude simulation and hydrodynamic force stress analysis after slamming occur are realized. According to the method, high-frequency pressure oscillation errors of a single SPH model in water-entry slamming peak capture are avoided, the defect that motion simulation after slamming cannot be achieved through a single BEM model is overcome, and effective simulation of the whole water-entry slamming process of the wedge is achieved.

The invention belongs to the technical field of hydraulic engineering monitoring, and discloses a hydraulic engineering inspection system and method, and the method comprises the steps: a positioning monitoring deployment module reasonably distributes the number and positions of positioning monitoring assemblies; the route planning module plans an optimal unmanned aerial vehicle flight route; planning an advancing route, a water entry position and a water surface leaving position of the underwater robot; the cruise monitoring module carries out all-directional inspection on a water conservancy area; the image analysis module identifies abnormal conditions; the infrared data analysis module recognizes abnormal conditions in time; the radar data analysis module identifies abnormal conditions; the comprehensive analysis module comprehensively evaluates the water conservancy condition; the risk prediction module predicts potential problems and risks. According to the invention, the positioning monitoring assembly and the cruise monitoring module are combined to realize omnibearing monitoring of a water conservancy area; omnidirectional three-dimensional inspection is realized, multi-modal data collaborative analysis is realized, abnormal conditions are identified, potential problems and risks are predicted, and possible faults or disaster hidden dangers of water conservancy facilities can be found in advance.

The invention relates to the technical field of sewage treatment, and discloses a process adjustment method and device based on water quality monitoring in sewage treatment, and the method comprises the steps: building a digital twin model based on a sewage treatment plant design drawing, marking performance index parameters, and generating a purification evaluation model based on each performance index parameter; water inlet detection parameters of input sewage are obtained so as to calculate a plurality of index concentrations and index to-be-treated capacities, and when it is detected that the concentrations exceed the standard or the to-be-treated capacities exceed the standard, a dilution instruction or a water storage instruction is generated and sent to the water transfer assembly; purifying detection parameters are obtained, the clearing rate of each index is calculated by combining the water entry detection parameters, and when the index clearing rate is smaller than the lower limit of the theoretical clearing rate, an abnormity checking signal is generated; inputting the water inlet detection parameters, the in-pool detection parameters and the temporary water storage amount into a purification evaluation model to generate an abnormal sewage modulation instruction, and sending the abnormal sewage modulation instruction to a water transfer assembly; the method has the effect of improving the integrating degree of the sewage treatment process and the sewage treatment load.

A sink strainer with water flow channels that allow the strainer to drain water even when covered with food debris. Each water flow channel increases the water flow efficiency of the strainer by adding water entry places that are not found in traditional strainers. For instance, water is allowed to flow through the rim of the present sink strainer. Each water flow channel includes a perforated raised rim ridge that allows water to enter the strainer through the edge of the rim and through the top of the rim. Each water flow channel also includes a perforated lower tunnel that adds additional water entry places to the perforated cup of the stainer. The preferred embodiment of the present sink strainer includes four perforated water flow channels that are spaced equally around the strainer.

Sound-permeable cover (120) for an acoustic device (102), wherein the cover comprises: a shrunk membrane material having an acoustic insertion loss of less than 6 dB at 1 kHz and a water inlet pressure (WEP) of at least 9.8 kPa, wherein the shrunk membrane material has a microstructure comprising serpentine fibrils and wherein the serpentine fibrils have a width of about 1.0 micron or less.

According to the underwater test device and the using method thereof, under the condition that the underwater angle of the aircraft is known, a sensor is fixed to the point position, making contact with the water surface first, of the head of the aircraft, multiple physical parameters such as pressure and impact acceleration at the underwater moment of the aircraft can be obtained, different head modules are replaced, and the underwater test of the aircraft can be achieved. The underwater vehicle head deformation measurement device can adapt to different water entry angles, basically adopts the same mechanism, obtains the measurement effect of multiple physical quantities, and can effectively improve the test precision and the test efficiency.

The river channel desilting device comprises a ship body, the ship body is hinged to a suction dredger capable of adjusting the water entry angle, a controller is further arranged in the ship body, the ship body is fixedly connected with a filter box, a filter screen is arranged on the side face of the filter box, a water tank for receiving filtered water is arranged below the filter box, and the water tank is connected with the controller. Pressure-bearing rods are symmetrically fixed to the side faces of the water tank, the ship body is fixedly connected with a supporting plate, the pressure-bearing rods are slidably connected with the supporting plate, the pressure-bearing rods are provided with switch assemblies matched with the supporting plate, the supporting plate is rotationally connected with a rotating wheel, and the rotating wheel is provided with a magnet; the magnet can be matched with the switch assembly to enable the water tank to move downwards, the ship body is provided with a speed adjusting part, the speed adjusting part can adjust the moving speed of the ship body according to the downward moving distance of the water tank, the device can be adjusted in time according to the actual condition that the suction dredger cleans riverbed sludge, and the use safety of the device is improved.

The invention provides a slamming acceleration accurate measurement method for a low-speed water entry problem, and belongs to the technical field of ship wave load tests.The method comprises the steps that a piezoelectric acceleration sensor and a capacitive acceleration sensor are arranged at the center of a model to form a measurement system, and slamming acceleration signal measurement and data acquisition are conducted synchronously; collecting high-frequency acceleration data of the piezoelectric acceleration sensor; collecting low-frequency acceleration data of the capacitive acceleration sensor; and superposing and synthesizing the high-frequency acceleration data and the low-frequency acceleration data to obtain a synthesized slamming acceleration signal. According to the invention, the problems of static acceleration signal loss and zero drift of the piezoelectric acceleration sensor are solved through a numerical optimization mode of signal correction; compared with the independent measurement of a high-frequency response capacitive slamming acceleration sensor, the noise of the acceleration signals is reduced and the signal-to-noise ratio is improved while the accurate measurement of high-frequency and low-frequency acceleration signals is considered in the existing test scheme.

The application discloses a solid droplet-based drag reduction ball preparation and testing method, and relates to the underwater drag reduction technical field.The preparation method comprises the following steps: performing decontamination treatment on the surface of a steel ball, configuring a PDMS solution and pouring the PDMS solution into a polytetrafluoroethylene mold with small holes with different curvature radii, performing vacuum degassing and solidification, and then peeling off to obtain solid droplet structures with different curvature radii, and bonding the solid droplet structures to the bottom of the steel ball.Through the regulation and control of the solid droplet curvature radius (2.5-10.8 mm) and the water entry speed, the high-speed camera technology is used to observe the change law of the sputtering crown formation, air entrainment and air cavity closure mode in the water entry process, the quantitative analysis of the underwater air cavity volume and the drag coefficient is combined, and the influence of the solid droplet curvature radius on the air cavity shape and the drag reduction performance is verified.The solid droplet structure optimizes the air film capture efficiency, significantly reduces the blunt body pressure difference resistance and the friction resistance, and the preparation process is simple, stable and suitable for the development of the underwater vehicle drag reduction technology.

The invention discloses environment-friendly riverway and lake treating and cleaning equipment, and particularly relates to the technical field of riverway cleaning equipment.The environment-friendly riverway and lake treating and cleaning equipment comprises a machine body, a turbine is arranged on one side of the machine body, a collecting barrel is arranged in the machine body, a floating device is arranged on one side of the machine body, and the floating device comprises a round hole plate and a buoy; an adjusting device is arranged between the round hole plate and the machine body, a protection device is arranged on one side of the buoy, a round hole block is fixedly connected to one side of the round hole plate, a positioning rod is slidably connected to the inner wall of the round hole block, and a round plate is fixedly connected to one end of the positioning rod. The situation that the machine body cannot suck garbage into the collecting barrel due to the fact that the water entry depth of the machine body is lower than part of vertically floating or slightly large garbage is reduced, meanwhile, the water entry depth of the machine body can be adjusted according to the depth of a water area, and the cleaning efficiency of the garbage on the water surface is improved.

The present invention discloses a method for detecting the internal environment of a hole, which includes: detecting the pulling force value in real time during the wire laying process. Since the resistance when entering the water is less than the resistance of collision and reaching the bottom, when the pulling force value suddenly decreases to the first pulling force value, that is, the pulling force value suddenly decreases and the stabilized pulling force value is greater than the bottom-reaching pulling force threshold and the collision pulling force threshold, it can be confirmed that the detection pendant has entered the water. After entering the water, based on the water entry situation, that is, based on the host computer calculating the pulling force difference between the first pulling force value and the pulling force value before the mutation, the wire laying speed is recalculated to obtain the wire laying speed in water, preventing the wire laying speed in water from being too fast, which may cause wire entanglement or false triggering of collision detection or bottom-reaching detection, thereby improving the accuracy of hole detection, improving the accuracy of placing explosives, and enhancing the blasting effect.

The invention belongs to the technical field of lifeboats, discloses a free-falling lifeboat model test method, and effectively solves the problem that the result is inaccurate when a wooden model is used for testing. Comprising the following steps: manufacturing a lifeboat model by glass fiber reinforced plastic according to a selected scale ratio; performing static calibration and dynamic calibration on the lifeboat model; carrying out a free falling test on the lifeboat model, measuring the impact acceleration of the lifeboat model falling into water, and measuring the water entering distance and the forward rushing distance of the lifeboat model; the method comprises the following steps: firstly, determining the angle of a landing slide way, preliminarily selecting an approved landing height and the length of the landing slide way, then respectively combining the weight distribution state and the initial landing state of a lifeboat model, then carrying out a free landing test, and finally determining the landing approved height, the landing slide way angle and the landing slide way length of the lifeboat. The acceleration test result is closer to the real boat test, and the accuracy is higher.