43 results about "Water velocity" patented technology

The invention belongs to the technical field of water conservancy monitoring, and discloses a water conservancy water level monitoring device and method, and the method comprises the steps: a monitoring point arrangement module of a monitoring mechanism reasonably arranges the number and positions of monitoring points; the flow velocity monitoring module monitors the water velocity; the meteorological data acquisition module acquires meteorological data; the echo sounder emits sound waves, and the water depth is calculated according to the sound wave propagation time and the sound velocity in water; the pressure water level gauge, the laser water level gauge and the radar water level gauge monitor the water level of water conservancy. The echo data analysis module analyzes the echo data; the comprehensive analysis module comprehensively analyzes the water level; the predictive analysis module predicts a water level trend and potential risks. The water level of water conservancy is monitored through various water level gauges, cross validation and high precision are achieved, and the sediment deposition thickness is accurately calculated by analyzing echo data; the comprehensive analysis module comprehensively evaluates the water level; the prediction analysis module integrates various monitoring equipment data and meteorological data, and predicts the water level trend and potential risks.

The invention relates to the technical field of bridge engineering, in particular to a probabilistic failure assessment method and system for a floating object impacting a bridge in a flood season, and the method comprises the following steps: collecting floating object data and river hydrological information in the flood season, and obtaining a water velocity condition and a floating object movement condition; a floater dragging force prediction model is established according to the water flow speed condition and the floater movement condition, and the dragging force generated by the flood to the floater is analyzed according to the model; setting a bridge damage assessment mechanism based on the flood season floating object data and the river hydrological information, and obtaining an assessment parameter analysis result according to the assessment mechanism; and a probabilistic failure judgment model is established, a probabilistic failure evaluation result is obtained by combining the dragging force, the evaluation parameter analysis result, the flood season floating object data and the river hydrological information, and the risk prediction and evaluation of the collision of the floating object on the bridge in the flood season are realized. By analyzing the failure mechanism of the bridge impacted by the floating object, the risk degree of bridge damage under different water flow conditions and floating object characteristics is quantified.

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 discloses a pure water treatment system for producing electrolyte hydrogen water, which belongs to the technical field of water treatment.The pure water treatment system comprises a water quality pretreatment module and a reverse osmosis module, and further comprises a water inlet pressure adjusting system, a water inlet pressure adjusting system and a water outlet pressure adjusting system, the turbidity, solute concentration, water temperature, PH value, water production speed, concentrated water discharge speed and water inlet pressure of inlet water entering the reverse osmosis module are obtained in real time; the inflow water quality evaluation module obtains an inflow water quality evaluation coefficient; the temperature evaluation module is used for acquiring a temperature damage coefficient; the water quality influence analysis module obtains a water quality influence coefficient; the liquid flow rate matching module is used for acquiring the liquid flow rate matching strength of the water production speed and the concentrated water discharge speed; the water pressure determining module constructs a water pressure adjusting model based on the water inlet pressure and the liquid flow rate matching strength, outputs target water pressure and adjusts the water inlet pressure to the target water pressure; the water production speed and the concentrated water discharge speed can be matched according to the influence of water quality and temperature on the membrane so as to dynamically adjust the water inlet pressure.

The invention discloses a multi-dimensional hydrological data fusion and analysis method and device based on an intelligent hydrological rod, and the method and device can synchronously obtain multi-dimensional hydrological detection data, such as water level height, water velocity, water temperature and water quality, through a hydrological sensor and a video collection device which are disposed on the intelligent hydrological rod. Visual video monitoring information such as river surface fluctuation, river bank change and river channel floating objects can be monitored; efficient data fusion and cross validation can be performed on the data based on an artificial intelligence algorithm, so that the accuracy and integrity of the data can be improved; in addition, deep analysis can be carried out on the data based on an artificial intelligence algorithm, and potential hydrological change rules and hidden risks are mined; besides, based on the data processing result, an accurate early warning, maintenance or emergency event processing decision can be generated through a preset decision coping algorithm, and the emergency response capability of hydrological monitoring is improved while the data utilization rate of the data processing result is improved.

The present invention provides an intelligent zero-discharge drainage method, comprising the following steps: S1: setting the maximum water intake depth H of the drainage pump without disturbing the sedimentation area 设 ; S2: The supernatant depth H1 of the first stage of water sedimentation in the metering tank reaches H 设 Time t, the initial sedimentation velocity V of the particles in the pool 沉 =H 设 / t; S3: When the supernatant depth H1 reaches H 设 When the drainage pump starts to work; S4: water outlet speed V 水 =V 沉 ‑A, A is the safety value; S5: the flow rate of the drainage pump Q1=V 水 ×S, S is the sedimentation area of ​​the pool, Q1 during initial operation = (H 设 / t‑A)×S; S6: With time t as the cycle, the supernatant depth of the second stage is monitored as H2, and the particle settling velocity V in the second stage 沉2 =H2 / t, repeat steps S3 to S5 to achieve dynamic control and intelligently control the water output. The present invention also proposes a drainage sedimentation tank using an intelligent zero-discharge drainage method, which has a small footprint and high sedimentation efficiency.

The present invention discloses a bridge scour warning method, device, equipment, and storage medium. The method includes the following steps: obtaining average water velocity and water depth data measured around a bridge pier; calculating corresponding scour depth data based on the average water velocity and water depth data; and comparing the scour depth data with warning depth data to determine whether a bridge warning should be triggered. This application can accurately monitor bridge scour depth data, thereby improving the reliability of warnings and effectively preventing losses caused by bridge scour disasters.

The invention discloses a method for determining the water accumulation speed and emergency disposal safety near a reverse slope TBM tunnel water burst tunnel face. The method comprises the steps that (1) the relation between the emergency disposal time and the effective water storage volume of a tunnel and the relation between the emergency disposal time and the water pumping and draining speed near the tunnel face are established; 2) establishing a relational expression among the accumulated water speed near the tunnel net water gushing tunnel face, the accumulated water level of the tunnel face and the rising speed of the accumulated water level of the tunnel face; 3) constructing a three-dimensional model for calculating the effective water storage volume near the tunnel face, and calculating the effective water storage volume; (4) measuring the accumulated water level and the accumulated water level rising speed near the tunnel face on site; 5) calculating the speed of accumulated water near the net water gushing tunnel face of the tunnel; by establishing a relation model of the emergency disposal time and the water storage volume, constructing a three-dimensional water storage volume calculation model and combining real-time water level monitoring data, the water accumulation speed and the emergency disposal time can be accurately calculated, and the method has the advantages that the accuracy of emergency disposal decision making is improved, and the operation reliability of equipment is guaranteed.

The triaxial apparatus rock mechanical strength test auxiliary device provided by the invention realizes confining pressure, water immersion and seepage coupling, and overcomes the technical defect that a rock mechanical strength test result does not conform to an actual condition under a dry-wet cycle condition. The water sump, the water flow control equipment, the system water pipe, the two-dimensional water flow control device, the flow dividing device and the triaxial apparatus water tank run mutually to jointly realize confining pressure, water immersion and seepage coupling test conditions, and the rock mechanical strength under the test conditions can be accurately obtained in real time in cooperation with a conventional triaxial apparatus rock mechanical strength test device. The auxiliary device can realize different water solution conditions such as pH change, ion concentration change, water source change, water temperature change and the like, and can realize different seepage environment conditions such as water velocity change, water impact angle change, water pressure change and the like. The method has important theoretical value and practical significance for revealing the instability mechanism research of the influence of reservoir water level fluctuation on the high-steep dangerous rock in the reservoir area.

The utility model belongs to the technical field of flow measurement floating balls, and particularly relates to a multi-sensor intelligent flow measurement floating ball which comprises a balloon and further comprises a shell fixedly installed at the bottom end in the balloon, a fixing rod fixedly installed at the bottom of the shell, and storage wheels installed on the two sides of the fixing rod in a penetrating mode. A fixing shaft is installed on the surface of the storage wheel in a penetrating mode, a rotating shaft is installed on the surface of the fixing shaft in a penetrating mode, an outer cylinder and a fixing rod are connected through an inner threaded rod, then a flow meter is installed through the outer cylinder, then a water meter is electrically connected through the flow meter, and then a turbidity meter is electrically connected through the water meter. When flow measurement is carried out on river water, the flow meter is used for detecting the water speed, then the water meter is used for monitoring the quality of the river water, and the turbidity meter is used for detecting the turbidity of the river water, so that a worker can conveniently carry out sensing detection on river water data, and the functionality and practicability of the floating ball are improved.

The invention discloses a respirator and electrical equipment. The technical problem that errors exist in water volume detection of the respirator is solved to a certain extent. The respirator comprises a shell and a water quantity detection assembly, the shell is provided with a water flow channel and a containing cavity, the water flow channel comprises a water inlet channel and a water outlet channel, the water inlet channel, the containing cavity and the water outlet channel are sequentially communicated, the water quantity detection assembly used for detecting the water inlet speed is arranged in the containing cavity, and at least part of the water flow channel is provided with a flow stabilizing section. The water inlet speed or / and the water outlet speed of the containing cavity is / are reduced.

The invention relates to a parallel water entry test launching system, in particular to a parallel water entry test launching system with adjustable launching angle, speed and projectile body spacing. The problem that an existing projectile water entry test device is insufficient in parameter adjustment flexibility is solved. The device has the advantages that the water entry speed, the parallel distance and the water entry angle can be adjusted, and the device is used for completing the research on the parallel water entry flow field evolution and the projectile loaded attitude trajectory on the parameters such as the water entry speed, the water entry distance, the water entry angle and the water entry projectile type. And secondly, high-speed parallel projectile entry into water can be realized, and the complete cavitation form can be accurately observed through cooperation with a high-speed camera. Finally, the device can launch projectiles with the outer diameter D of 10 mm, and parallel water entry tests of different projectile types can be carried out at the water entry speed of 5-120 m / s, the water entry angle of 0-90 degrees and the water entry space of 18-60 mm. The invention belongs to the technical field of cross-medium water entry.

The present invention relates to the technical field of computer-aided architectural design, and provides a method and system for modeling water supply and drainage pipelines based on BIM technology, including: obtaining the ideal speed of water flow reaching each position of the drainage pipeline according to the prior data of drainage pipeline modeling; calculating the bending resistance coefficient of the water flow in the drainage pipeline reaching the first intersection position of the drainage pipeline, determining the influence degree of water flow intersection when the water flow in the drainage pipeline reaches the first intersection position, and determining the actual water flow speed of the water flow in the drainage pipeline reaching the outlet position of the drainage pipeline; screening the pipelines with in-depth influence, determining the adjusted slope of the pipelines with in-depth influence, and obtaining the modeling result of the drainage pipeline according to the adjusted slope of the pipelines with in-depth influence, the slope ratio of other drainage pipelines and the preset slope. The present invention can make the drainage speed reach the expected value.

A composite generating device based on direct-current water flow pulse vibration relates to the technical field of fluid power machinery and comprises a tee joint, a first port of the tee joint is connected with a water outlet pipe, a second port of the tee joint is sleeved with a sealed elastic telescopic structure, and a third port of the tee joint is connected with a water inlet component. The inner top of the sealed elastic telescopic structure is connected with a plugging structure connecting rod, and the lower end of the plugging structure connecting rod is connected with a plugging structure used for plugging a water inlet port of the water outlet pipe. During intermittent and regular acceleration or deceleration of water flow in the plugging structure and the sealed elastic telescopic structure, the internal average water pressure is larger than the water pressure of straight-flow water due to the action of the water hammer, so that the water flow speed of discharged water is larger than the water outlet speed of the straight-flow water; due to the fact that the water flow of the pulse water is discontinuous, and the water flow of the straight-flow water is continuous, the flow of the pulse water flow is smaller than that of the straight-flow water under the conditions of the same water pressure, the same water outlet caliber and the same water outlet time, and the purpose of saving water is achieved.

The invention discloses an intelligent detection system for oil containment boom laying data, and belongs to the field of river spilled oil recovery. The system comprises a catamaran body part, a water velocity detection part, a river depth detection part, a river width detection part and a main control unit part. The catamaran body part comprises a water velocity detection part, a river depth detection part, a river width detection part and a main control unit part, and the catamaran body part, the water velocity detection part, the river depth detection part and the river width detection part are connected with the main control unit part; the catamaran body part drives the oil containment boom laying data intelligent detection system to move, the water flow velocity detection part detects the water flow velocity at different depths, and the river depth detection part detects the river depth within a specified river basin range. The river width in a specified river basin range is detected through the river width detection part. The intelligent acquisition platform for oil containment boom laying data is constructed by skillfully arranging the water velocity detection part, the river depth detection part and the river width detection part, and a data basis is established for river oil spill work.

The invention relates to the technical field of computer-aided building design, and provides a water supply and drainage pipeline modeling method and system based on a BIM technology, and the method comprises the steps: obtaining an ideal speed at which a water flow reaches each position of a drainage pipeline according to the prior data of drainage pipeline modeling; calculating the bending resistance coefficient of the water flow in the drainage pipeline reaching the first intersection position of the drainage pipeline, determining the water flow intersection influence degree of the water flow in the drainage pipeline reaching the first intersection position of the drainage pipeline, and determining the actual water flow speed of the water flow in the drainage pipeline reaching the outlet position of the drainage pipeline; and screening the depth influence pipeline, determining the adjustment gradient of the depth influence pipeline, and obtaining the modeling result of the drainage pipeline according to the adjustment gradient of the depth influence pipeline, the gradient proportion of other drainage pipelines and the preset gradient. The drainage speed can reach the expectation.

The invention belongs to the technical field of coal mine drilling machine equipment, and particularly relates to a coal mine drilling machine capable of adjusting water outlet speed, which comprises a base for fixing the whole device, and further comprises a shell arranged on the base and used for mounting other parts. And the drilling machine main body is arranged on the shell, and the drilling machine main body is used for drilling operation. The driving mechanism is arranged on the base and used for adjusting the drilling angle of the drilling machine body. Through cooperation of the adjusting mechanism and the circular ring, specifically, when a drilling machine needs to drill holes in different positions, the size of a water outlet can be automatically adjusted, due to the fact that the water pressure of an external water pump is kept stable, the speed of water flow can be increased when the water outlet is small, residues in the drilled holes can be conveniently cleaned, and the drilling efficiency is improved. Therefore, the slag removal operation at different speeds can be carried out on drill holes in different positions.

The present invention relates to a sedimentation tank, which comprises: a water inlet tank having enclosed side walls, and openings formed among the multiple side walls for fluid to flow out of the water inlet tank; the water inlet pipe is partially arranged in the water inlet tank, the water inlet pipe comprises a water outlet located in the water inlet tank, and the water flow direction of the water outlet is different from the water flow direction of the opening; and the settling tank is positioned at the downstream of the water inlet tank and is connected to the opening. The water flow direction at the water outlet of the water inlet pipe of the sedimentation tank is different from the water flow direction flowing into the sedimentation tank from the water inlet tank, so that the water outlet speed at the opening of the water inlet tank can be effectively slowed down, the water distribution uniformity is improved, the turbulent flow phenomenon in the equipment is reduced, the water inlet speed of the sedimentation tank is slowed down, and the sludge sedimentation effect in the sedimentation tank is improved.

The invention discloses an intelligent watering cart, and belongs to the technical field of watering carts, the intelligent watering cart comprises a cart body, a tank body, a water conveying mechanism and a watering antiaircraft gun are mounted on the cart body, the water conveying mechanism is used for conveying water in the tank body into the watering antiaircraft gun, the watering antiaircraft gun comprises a gun body, and a water outlet adjusting part is mounted at the end of the gun body; the water outlet adjusting piece is driven to adjust the flow area of a water outlet in the end of the cannon body so as to change the water outlet speed. According to the watering cart provided by the embodiment of the invention, the water outlet adjusting piece is arranged at the water outlet of the cannon body, and the water outlet adjusting piece can correspondingly adjust the circulation sectional area of the water outlet according to the change of the irrigation distance, so that the water flow speed of the water outlet is dynamically adjusted, and the irrigation intelligence is improved; it is ensured that trees at the corresponding distance are watered at the appropriate water flow speed all the time, the trees are protected against damage, and meanwhile the original structure of soil can be prevented from being damaged.

The present invention provides a jointly designed method and system for current estimation and ship waterline monitoring, belonging to the field of ship monitoring technology. The method comprises the following steps: First, a shore-based center deploys an underwater robot (AUV) based on the monitoring mission requirements, plans its motion path, and establishes a water gauge dataset for model training. Upon reaching the vicinity of the ship, the AUV uses a Doppler velocimeter to measure the water velocity and direction. Combined with the AUV's trajectory information, the AUV predicts the future water velocity field. Simultaneously, the AUV captures waterline images using an onboard camera, performs preprocessing, and calculates the waterline image's reliability. Furthermore, the AUV corrects its posture in real time based on the predicted water velocity field and the waterline image's reliability, achieving joint estimation of the current and the ship's waterline. This invention combines current estimation with ship waterline monitoring, enabling stable, efficient, and comprehensive monitoring of the ship's waterline using the AUV.

The invention discloses a reservoir gate computer monitoring system which comprises the following steps: setting a plurality of measurement directrixes at the upstream of a reservoir, deploying a measurement point on each measurement directrix to measure a water flow velocity vector, calculating a water flow incident angle of each measurement point, and obtaining a local incident angle of each gate receiving water flow; the arc length of the arc-shaped guide rail structure is calculated according to the local incidence angle of the gate receiving water flow, the arc-shaped guide rail structure guides the side edge of the gate as a rotating shaft to achieve deflection, and the flowing direction of the water flow passing through the gate is corrected; a sensor is used for measuring the water outlet speed and the water outlet thickness of water flow passing through each gate, and each gate is controlled to deflect according to the water outlet flow; when the gate is closed, the height of the opposite side of the gate rotating shaft is vertically increased, the gate rotating shaft is controlled to be in butt joint with the bottom edge, the opposite side of the gate rotating shaft is suspended to release water flow, the water flow assists the opposite side of the gate rotating shaft in constant-speed restoration, the drainage efficiency is improved, and the bank slope scouring risk is reduced.

The present invention discloses a real-time detection system for water flow rate, which belongs to the field of water flow rate detection technology, including: a model conversion module for adapting the user's model configuration parameters to the water flow rate measurement model developed based on the edge device; a device-side WEB interface for data interaction with the edge device; a model reasoning and optimization module for optimizing the adapted water flow rate measurement model through a hybrid AI acceleration inference engine; a business processing module for pushing the reasoning results to the server, and an APP packaging and deployment module for expanding or replacing the original functions in the device; the present invention provides a computing power camera-based real-time monitoring of water flow rate, completes real-time detection of water flow rate at the edge, and then returns key information such as detection results and alarms to the central server. Compared with the traditional central-end computing mode, the present invention reduces the bandwidth consumption of data transmission, reduces the detection cost, and improves the efficiency of water flow rate detection.

This application discloses a channel flow measurement method and apparatus based on big data-based velocity estimation, relating to the field of channel water flow measurement. The method includes acquiring the surface depth of water, surface depth of silt, surface velocity of water, and intra-water velocity measured using an automatic current meter at different times and locations of various measuring points under different operating conditions in a target channel; inferring the matching relationship between surface depth, silt surface depth, and intra-water velocity, or deriving the matching relationship between surface depth, silt surface depth, surface velocity, and intra-water velocity, thereby determining the flow rate of the channel under test. In this application, the matching relationship between surface depth, silt surface depth, and velocity, or the matching relationship between surface depth, silt surface depth, surface velocity, and intra-water velocity, enables accurate measurement of flow rate under extreme sediment conditions.

A water velocity meter disclosed by the present invention comprises a waterproof ventilation valve, a flange cylinder, a dry end unit and a wet end unit, the dry end unit is provided with a watertight cavity, the waterproof ventilation valve is installed on the dry end unit, the waterproof ventilation valve is communicated with the watertight cavity and an external environment, the flange cylinder is provided with a cylinder cavity, and the flange cylinder is installed on the dry end unit. The flange cylinder is installed at the bottom of the dry end unit, the cylinder cavity of the flange cylinder is communicated with the watertight cavity of the dry end unit, and the top of the wet end unit penetrates through the cylinder cavity of the flange cylinder and then stretches into the watertight cavity of the dry end unit. The wet end unit is connected to the dry end unit in a drivable mode, and the dry end unit drives the wet end unit to ascend and descend.

The present invention provides a method for predicting water and mud inrush in tunnels. The method comprises: obtaining geological data at a predetermined tunnel location; calculating energy loss during seepage based on the obtained geological data; and predicting the velocity of water inrush in the tunnel based on the obtained geological data and the energy loss during seepage. Application of the present invention can rapidly predict the velocity of water inrush in tunnels, preventing casualties caused by water inrush. It can also provide a water inrush risk assessment method for tunnel construction units, enabling technical personnel to formulate water inrush predictions based on the water inrush risk assessment.

The application relates to the technical field of seismic data processing, and discloses a water velocity inversion and separation method, device, equipment and medium based on multi-information constraint, which comprises the following steps: suppressing virtual reflection of obtained marine node data, and determining a picked first arrival; obtaining first field measurement information and second field measurement information related to water velocity; determining an initial water velocity and a water velocity change amount with depth based on the first field measurement information and the second field measurement information; and based on the first arrival, the initial water velocity and the water velocity change amount with depth, constraining water velocity inversion and separation, and combining the first field measurement information to perform time difference correction on the water velocity. According to the scheme, the influence of virtual reflection energy on the first arrival wave time is removed through virtual reflection suppression, the calculation accuracy is improved, the inversion process is constrained by using multiple information, factors influencing the water velocity are separated, then the separated factors are used for time difference correction of the water velocity, and the instability of inversion is avoided.

The utility model provides a testing device for researching the impermeability stability of a soil body. A testing device for soil impermeability stability research comprises a compressor, a first water pipe, a water tank, a second water pipe, a first testing pipe body, a second testing pipe body and a water collecting tank which are sequentially connected, and a detachable iron gauze is arranged at the open end of the first testing pipe body; a flow velocity sensor for measuring the water velocity is arranged in the water outlet end of the second test tube; and a filter layer through which water passes but not soil passes is arranged in the middle of the water collection tank. The device disclosed by the utility model is specially used for researching the impermeability stability of the soil body and has the advantages of simple structure, simplicity and convenience in operation and the like; by replacing different anti-piping material layers, the most effective anti-piping material for the tested soil can be obtained according to a test result; the applicability of the same anti-piping material layer to the test soil with different particle gradation can be obtained according to the test result by replacing the test soil with different particle gradation.

The invention discloses a resonator cooling water leakage detection method, device and system and a storage medium. The resonator cooling water leakage detection method is suitable for the resonator cooling water leakage detection system, the resonator cooling water leakage detection system comprises laser drilling equipment and a monitoring platform connected with the laser drilling equipment, the laser drilling equipment comprises a resonator, and a water leakage detection rope is arranged in the resonator. Comprising the steps that when a resonator water leakage signal is not detected through a water leakage detection rope, the real-time water inlet flow and the real-time water inlet speed of a cooling water inlet pipe of a resonator and the real-time water outlet flow and the real-time water outlet speed of a cooling water outlet pipe of the resonator are obtained; and cooling water leakage fault information of the resonator is determined according to the real-time water inlet flow, the real-time water inlet speed, the real-time water outlet flow and the real-time water outlet speed, and the cooling water leakage fault information is fed back to the monitoring platform. According to the invention, accurate monitoring of cooling water leakage of the resonator of the laser drilling equipment is realized, and the safety and efficiency of the laser drilling equipment are ensured.

The invention belongs to the technical field of air tightness and loading capacity testing, and discloses a water pressure testing method. The water pressure testing method comprises the following steps: connecting internal water channels of a plurality of workpieces to be tested in series through pipelines; one end of the pipeline is communicated with the flushing device, the other end of the pipeline is communicated with a water outlet pipe, and a switch valve is arranged at the water outlet pipe; closing the switch valve, and performing water pressure detection; carrying out a pressure maintaining test; and discharging water in the plurality of to-be-detected workpieces and the pipeline. By using the water pressure testing method in the embodiment, the flushing speed is high, the efficiency is high, water can be rapidly drained, and the detection efficiency is improved.

The utility model discloses a water outlet device which comprises a body and a rotating piece. The body is provided with a water inlet channel, a first water outlet cavity, a second water outlet cavity and a water outlet hole suitable for being communicated with the first water outlet cavity and the second water outlet cavity, the rotating part is rotationally connected with the body and provided with a water distribution hole, the water inlet end of the water distribution hole is communicated with the water inlet channel, and the water outlet end of the water distribution hole is suitable for being communicated with the first water outlet cavity and the second water outlet cavity. When the water distribution hole is only communicated with the first water outlet cavity, the water outlet hole discharges water inwards, when the water distribution hole is only communicated with the second water outlet cavity, the water outlet hole discharges water outwards, and the experience that the water outlet holes are the same but the water outlet directions are different is achieved. And at least one of the water outlet end of the first water outlet cavity and the water outlet end of the second water outlet cavity is an acceleration hole, and the acceleration hole is suitable for accelerating water flow and generating a pressurization effect, so that the water outlet speed is higher, the impact force is improved, the user experience is improved, and the water outlet can be used under low pressure.