262 results about "Water entry" patented technology

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 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 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 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.

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.

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.

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.

The present invention discloses a high-speed water entry impact test system and test method. The test system includes a carbon dioxide phase change acceleration module and a test structure assembly, and the test structure assembly includes a cylinder, a piston rod assembly, an electromagnetic suction cup, and a counterweight limit plate; a pressure sensor and a high-speed camera are installed in the test structure landing area in the test water tank, and a temperature sensor is installed in the carbon dioxide phase change acceleration module; in the initial state, the electromagnetic suction cup fixes the counterweight limit plate, the piston rod assembly, and the test structure in the initial position; when the test starts and the test structure has not entered the water, the counterweight limit plate, the piston rod assembly, and the test structure accelerate downward together until the test structure is accelerated to the target speed; when the test structure enters the water, the gas in the cylinder is depressurized and the acceleration of the test structure is stopped, and the test structure falls into the water body of the test water tank at the target speed. The present invention does not require a high water entry height to achieve high-speed structural entry into the water.

The invention discloses a splitting reef cleaning intelligent control device and method, and relates to the technical field of splitting reef cleaning intelligent control, and the device comprises a monitoring data collection module, a monitoring data initial processing module, a monitoring index module, a model construction module and an intelligent evaluation control module. Splitting and reef cleaning monitoring data are collected through a Doppler current meter, a radar type tide level instrument, a leveling rod, a level gauge and sensor equipment, the intelligent evaluation control module evaluates the influence degree of water flow and tide on splitting equipment, corresponding measures are taken for response, and the working efficiency is improved. According to the invention, a monitoring data acquisition technology, a neural network algorithm technology and a modern information technology are closely combined, and the influence degree of water source data on the displacement of the splitting equipment and the influence degree of tide data on the water entry depth of the splitting equipment are obtained; the problem that a traditional splitting reef cleaning device and method cannot integrate multiple factors to guarantee the splitting reef cleaning precision is solved.

The utility model discloses an underwater topographic surveying and mapping device which comprises a case, and a crawler wheel mechanism is arranged at the bottom of the case; a grabber is arranged on one side of the front of the top of the case, a surveying and mapping component is mounted on the grabber, and an illuminating lamp assembly is arranged on one side of the rear of the top of the case; the grabber comprises an arm, the arm comprises a first rod body, a second rod body and a third rod body, the first rod body, the second rod body and the third rod body are sequentially pivoted, and the grabber further comprises a grabbing component arranged at the front end of the third rod body; the bottom of the first rod body is connected with the case through a first driving part; a second driving part is arranged at the pivoted part of the second rod body and the first rod body; the surveying and mapping device is in a water entry mode and is combined with a bottom crawler wheel mechanism, all-terrain and all-weather running can be achieved, and the effect that surveying and mapping are more accurate is achieved.

The application discloses a control method of amphibious track operation equipment, and relates to the technical field of underwater operation equipment.The method comprises the following steps: according to pressure information of four walking wheel groups and an amphibious track, adjusting attitude information of suspension hydraulic cylinders of the four walking wheel groups, so that walking main wheels of the four walking wheel groups are uniformly engaged with the amphibious track; determining an auxiliary connection mode of the amphibious track operation equipment according to a water entry condition of the amphibious track operation equipment, and controlling the amphibious track operation equipment to run based on the auxiliary connection mode and contact the amphibious track.The application can maintain a stable running state of the amphibious track operation equipment at all times by adjusting the attitude information of the suspension hydraulic cylinders of the four walking wheel groups, and different auxiliary connection modes are set for different water entry conditions, so that the amphibious track operation equipment can stably contact the amphibious track in any water entry state, and the application scene and stability of the amphibious track operation equipment are improved.

The invention belongs to the technical field of physical training equipment, and particularly relates to a portable diving spray suppression training device.The portable diving spray suppression training device comprises a bottom plate, the upper surface of the bottom plate is fixedly connected with a mounting box, and an action posture analysis module and a spray simulation and parameter comparison module are arranged and can be combined with a pressure sensor on an elastic springboard and a high-definition camera on the bottom face; and the inertial measurement unit on the vertical rod is used for collecting key data such as pressure distribution, air attitude angle and water entry moment track when the athlete jumps in real time and comparing the key data with standard water spray suppression parameters, the data are displayed in real time through the LED control screen, and the athlete can intuitively know the problems such as self action deviation and air body attitude imbalance. Through matching of the hydraulic cylinder at the bottom of the bottom plate, the universal wheels and the push rod on the right side, the device can be easily moved to a venue, an outdoor temporary training point and even a pre-racing adaptive site, the stability during training can be ensured through brake devices of the universal wheels and balancing weights on the bottom plate, and the displacement risk is avoided.

The invention discloses a sinking control method and a related device, and the method is applied to an underwater robot, and comprises the steps: obtaining the body posture information of the underwater robot, and determining the relative position relation between a water inlet of the underwater robot and the water surface; motor control parameters matched with the relative position relation and the fuselage attitude information are determined, and a motor is controlled to operate according to the determined motor control parameters, so that water flow is driven by the motor to enter the underwater robot shell; and if it is detected that the underwater robot meets a preset sinking completion condition, determining that the underwater robot completes sinking. The control parameters of motor operation are adaptively adjusted based on the posture information of the machine body and the position relation of the water inlet relative to the water surface, so that water flow can effectively enter the shell of the robot in different posture states, the water filling process in the shell is accelerated, and the overall weight of the robot is increased; rapid and stable sinking of the underwater robot is achieved, and the underwater entering efficiency and the use stability of the underwater robot are improved.

The present invention belongs to the technical field of hydrodynamic testing, and relates to an amphibious vehicle entry and exit water test platform with continuously adjustable slope. It comprises a test pool, an amphibious vehicle entry and exit water test platform, shore ground, pool ground, and pool wall, wherein the amphibious vehicle entry and exit water test platform mainly comprises an amphibious vehicle angle adjustment slope, an underwater lifting gantry structure, and an onshore starting point positioning platform structure, which is mainly used to verify the climbing ability of the amphibious vehicle during the entry and exit of the water, and provide technical support for the verification of the amphibious vehicle performance. The amphibious vehicle entry and exit water test platform based on the continuous adjustable slope of the present invention can be coupled with a vertical pool wall water pool without a slope, and at the same time has the function of continuous adjustment of the slope angle, which can gradually verify the performance of the amphibious vehicle in and out of the water. The present invention has an underwater platform angle fastening flange surface and an angle slope angle positioning fixing surface, and can fasten the adjusted amphibious vehicle angle adjustment slope according to the test needs, thereby improving the stability and reliability of the entire platform.

The application provides a kayak athlete power output coordination control method, comprising: collecting the paddle water entry depth, the angle of attack deflection angle, the athlete power time and the hull acceleration, obtaining the complete record containing the paddle track arc and the hull acceleration change; according to the change of the straight line track and the arc track when the hull accelerates, the angle of attack deflection angle is extracted, the deviation degree of the angle of attack deflection angle and the effective propulsion angle range is evaluated, and the proportion of energy loss caused by the lateral component force under different deviation degrees is identified; according to the power output timing coordination score, the smoothness of the power transmission among the athlete, the paddle and the hull is analyzed, and the stability of the transmission efficiency in the acceleration stage is identified after removing the interference signal; according to the track optimization direction adjustment training system collection setting, the track optimization direction is returned to the collection density adjustment link, and the time interval setting of the next data collection is determined.

The utility model relates to the technical field of lotus root pool water quality monitoring, and particularly discloses a lotus root pool water quality monitoring buoy frame which comprises a flat plate, a data transmitter and a water quality detection sensor, floating bodies are installed at the four corners of the lower end face of the flat plate, and two installation frames are fixedly connected to the upper end of the flat plate. Two rope penetrating holes are formed in the upper end face of the flat plate in a penetrating mode, winding shafts are rotationally connected to the interiors of the two mounting frames correspondingly, and nylon ropes penetrating through the two rope penetrating holes correspondingly are fixedly connected to the outer walls of the two winding shafts correspondingly; the water entering length of the water quality detection sensor can be adjusted by rotating the winding shaft to wind and unwind the nylon rope, and the position is fixed by utilizing the self-locking characteristic, so that the water entering length of the nylon rope can be adjusted as required to effectively adapt to lotus root pools with different water depths, and the water entering depth of the water quality detection sensor can be changed by manually sliding the adjusting cylinder and locking the position. Height adjustment of the water quality detection sensor is achieved, flexible detection can be conducted on water layers of different depths, and the use flexibility of the device is remarkably improved.

The utility model discloses an adjustable support for hydrology and water resource monitoring, and relates to the technical field of water resource monitoring, in particular to an adjustable support for hydrology and water resource monitoring, which comprises a fixed support plate, the top and the bottom of the front surface of the fixed support plate are fixedly connected with fixed frames, and a screw rod is rotatably connected between the fixed frames through a bearing seat. By arranging the adjustable support assembly, during use, the extending distance of an inner rod is adjusted by rotating a tightening bolt to control the water entry position of the monitoring equipment, then a motor is started, a lead screw rotates to adjust the position of a connecting base, and therefore the monitoring equipment moves downwards into water and is adjusted to the height needing to be monitored; the accuracy of the water entry position and the water entry depth of monitoring equipment is greatly improved, the accuracy of monitoring detailed parameters of different depths in a water body is improved, and the situation that traditional personnel detection consumes a large amount of manpower and occupies personnel time is reduced.

The utility model provides a modularized step teaching device, which comprises a sand table assembly and a vibration test module, and is characterized in that the sand table assembly comprises a sand table base, a first frame, a plurality of accommodating grooves and an assembling table; wherein the first frame is inserted into one side of the upper surface of the sand table base. According to the utility model, a bridge structure building platform is provided for students by using the assembling platform, and then the bridge structure is sequentially limited in the vibration test module, the pressure bearing test module and the water entry test module by using the mounting module; therefore, vibration, pressure bearing and water entry tests can be carried out on the bridge structure in sequence, the bridge structure can be adjusted in time according to test results, and the learning efficiency and the teaching effect are improved. The bridge test structure is modularized, so that a pressure bearing test is performed on the bridge structure while a vibration or water entry test is performed, comprehensive test is performed on the bridge structure, and the test effect is improved.

The application discloses a water seal test device and a sealing test method for a cabin door sealing element. The water seal test device comprises a sealing box body, the sealing box body is provided with a mounting position for mounting the cabin door sealing element; a pressure applying element is movably mounted on the sealing box body, and the pressure applying element is used for being in mutual extrusion contact with the cabin door sealing element and dividing the space in the sealing box body into a first chamber and a second chamber, the pressure applying element is moved to adjust the compression amount of the cabin door sealing element; a first pressure control assembly is connected with the first chamber and used for controlling the pressure of the first chamber; and a second pressure control assembly is connected with the second chamber and used for controlling the pressure of the second chamber. The water seal test device can be used for testing the leakage of the cabin door sealing element under different compression amounts, the multiple mounting and clamping for testing different compression amounts are effectively avoided, the sealing test demand of the water entry working condition can be met, and the operation difficulty and cost are reduced.