69results about How to "No need to take up space" patented technology

The invention discloses a device and method for activating a voice control module through gesture recognition. The device comprises a shell, a displayer fixed to the shell and an activation structure. The activation structure comprises a gesture recognition sensor, a data processing module and a storage module, wherein the gesture recognition sensor is arranged outside the shell, and the data processing module and the storage module are arranged inside the shell. The gesture recognition sensor is used for capturing real-time gesture information of a driver and transmitting the real-time gesture information to the data processing module, the storage module stores control gesture information defined by the driver, and the data processing module compares the real-time gesture information with the control gesture information and then controls on-off of a voice control module according to the comparison result. According to the device and method, on-off of the voice control module is completed through gesture recognition, the driver does not need to touch a button by hand, the body movement range of the driver is reduced, and therefore driving safety is improved. The gesture recognition method is merely influenced by the environment, is not influenced by noise at all and is good in reliability.

The invention discloses a judging device and a judging method for judging the stopping and rotating states of a step motor. The device is applied to the step motor with at least two stator windings and a rotor, and is characterized in that the continuous clock pulses of at least two different phases are respectively produced through a driving module, and are sent to the two stator windings, so as to enable the rotor to run and let the stator windings to produce back electromotive force with intervals in turn, then a control module, the threshold voltage of which is preset, is used for alternately inputting a sensing time interval to the driving module in a way of corresponding to the continuous clock pulses of at least two different phases, so as to enable a sensing module to sense out the back electromotive force produced by the stator windings according to the sensing time interval, and carry out the comparison between the back electromotive force and the threshold voltage, thereby letting the control module to judge the stopping and rotating states of the step motor when the back electromotive force is lower than the threshold voltage, and correspondingly outputting a stopping and rotating state signal, so that not only the problems that a micro switch is usually required to be added and the space of the original step motor control system is occupied are solved, but also the cost in structural design and added elements is saved.

The invention discloses a steel hydraulic river sluice which comprises a control system and a plurality of sluice gate units. Each sluice gate unit comprises a secondary concrete sluice gate groove, amain anchor bolt embedded part, a sluice gate body, a sensor, an oil cylinder, a swing oil cylinder, a hydraulic system and a limiting switch. All the sluice gate bodies harmoniously move on the whole. According to the river sluice, rising and falling of the multiple sluice gate units are automatically controlled; during outage caused by flooding, hydraulic oil can be pressed back to an oil tankthrough the self-weight of water, and the water level is controlled to achieve safe flood discharge; through the combined-type design, the installation process is simplified, no middle sluice pier isneeded, and maintenance is easy, convenient and feasible; the arc-shaped sluice gate bodies and a stiffened plate can effectively smoothen a water flow; the sluice is supported through the oil cylinders and the swing oil cylinders, and a foundation is simple; no mechanical bearing is needed, no guiding groove is needed so that a water seal cannot be blocked by sand entering of the guiding groove,and no space is occupied by a hydraulic arm; and information collected by the sensors is transmitted to the control system, and the control system sends an instruction to the hydraulic systems to automatically control the oil cylinders to adjust the elevation angles, namely the water retaining heights, of the sluice gate bodies.

The invention discloses a hierarchical monitoring system. A power supply is connected to the first power supply port of the first network camera through a power line. The second power supply port andthe third power supply port of the first network camera are respectively connected to the first power supply port of the second network camera and the first power supply port of the third network camera. A monitoring center network switch is connected to the first network interface of the first network camera through a network line. The third network interface and the second network interface of the first network camera are respectively connected to the first network interface of the second network camera and the first network interface of the third network camera. The second network interfaceand / or the third network interface are electrically connected to a network accessory terminal. The monitoring center network switch is separately connected to a manager video monitor and a manager console. The network accessory terminal comprises at least a entrance guard, a microphone, a iris recognition device, a face recognition device, an intrusion alarm system, a network hard disk recorder,a network alarm and a network interphone.

The invention discloses a noise-reducing and rain-proof drainage hood. The noise-reducing and rain-proof drainage hood comprises a cylinder body. The cylinder body comprises an upper cone cylinder anda lower cone cylinder. Each of the cylinder walls of the upper cone cylinder and the lower cone cylinder comprises an inner cylinder wall body, an outer cylinder wall body and a silencing layer. An open lower cone cap is mounted in the cylinder body. A water guide pipe is connected to the lower end of the lower cone cap. The water guide pipe inclines downwardly, penetrates the cylinder wall of the lower cone cylinder and extends out of the cylinder body. According to the noise-reducing and rain-proof drainage hood, noise enters from an air inlet, the noise is absorbed by a punching slicing plate of the lower cone cylinder and the silencing layer, then rebounded to a punching slicing plate of the upper cone cylinder and the silencing layer and then transmitted out through an air outlet; inthe process, the noise is subjected to multiple times of rebounding, slicing and noise reduction, the noise can be lowered to 50-60 dB, the slicing and noise reduction effects are ideal and meet andexceed the national emission standards, and the noise-reducing and rain-proof drainage hood has the function of eliminating the radiated noise of an air outlet of a chimney; and besides, the hood meets the requirements on ventilation and prevention of invasion of sand and dust blown by wind, rainwater and snow water and has the beneficial effects of being small in size, low in weight, easy and convenient to mount, low in cost and the like.

The invention relates to a hybrid magnetic bearing and a control method thereof. The problems that an existing hybrid magnetic bearing can not ensure dynamic distribution of magnetic poles and is poor in balance are solved. The hybrid magnetic bearing comprises a stator, a rotor and a control system, wherein the stator comprises a permanent magnet array and an electromagnet array, the electromagnet array is at least composed of above 6 electromagnets, the quantity of which is an even number, the control system comprises switch pairs, a power amplifier driver and a digital signal processor, the digital signal processor comprises an ADC (Analog to Digital Converter) unit and a CPU (Central Processing Unit) which are connected with each other, each switch pair is correspondingly connected to an electromagnet coil, the ADC unit is connected to each electromagnet coil, the CPU is connected with the power amplifier driver, and the power amplifier driver controls and connects the switch pairs. The hybrid magnetic bearing has the advantages that the attributes of magnetic poles are dynamically distributed and controlled so that the balance of the magnetic bearing is good; by adopting a self-sensing technology, the stability of a rotor system is ensured, the cost is lowered, the space does not need to be occupied, and the maintenance and calibration are simple.

The invention discloses a PTZ rotation control method and device. The method comprises the following steps: obtaining starting positioning information through a magnetometer and / or a gyroscope on a mobile terminal, wherein the starting positioning information comprises at least one of an initial azimuth angle and an initial dip angle; sensing the displacement change and obtaining stopping positioning information through the magnetometer and / or the gyroscope, wherein the stopping positioning information comprises at least one of the current azimuth angle and the current dip angle; and controlling the PTZ to rotate according to the starting positioning information and the stopping positioning information. According to the technical scheme provided by the invention, the operation manner is simple and easy, no screen space is occupied, and the linear rotation can be realized without constantly carrying out fine tuning according to the played pictures fed back by preview.

The invention relates to a treating apparatus for waste liquid produced in sodium-process flue gas desulfurization. The treating apparatus mainly comprises a flue gas / desulfurization waste liquid heatexchanger, a dust-removal and desulfurization tower, a solid-liquid separator, a plate heat exchanger and a steam compressor, wherein the flue gas / desulfurization waste liquid heat exchanger is divided into an upper heat exchange zone and a lower crystallization zone; the upper heat exchange zone comprises a steam chamber, an upper tube plate, a partition plate, a heat exchange tube and a lower tube plate from top to bottom; a desulfurization waste liquid feeding box is arranged between the upper tube plate and the partition plate; a liquid film former is arranged at the heat exchanger tube end of the desulfurization waste liquid feeding box; the lower crystallization zone is provided with an inclined drainage plate, a sealing plate and a crystallization tank; and the sealing plate is inserted into a position located below the liquid level of the crystallization tank. Through adoption of the specific treating apparatus and a specific treating method, the dual purposes of allowing purified flue gas to meet emission requirements and realizing zero discharge of waste liquid produced in flue gas desulfurization are achieved on the basis of full use of the waste heat of flue gas; and in particular, the supplementation amount of fresh water for a flue gas desulfurization system is reduced, and overall treatment cost of flue gas desulfurization and desulfurization waste liquid is lowered.

The invention provides a display substrate. The display substrate includes a display area. The display area includes a plurality of pixel units. The display substrate further includes at least one antenna. The antenna is disposed at a boundary of the pixel units. At least one antenna is used to transmit a detection wave to the outside after receiving a drive signal. At least one antenna is used togenerate an inductive signal after receiving an inductive wave from the outside. The invention also provides a display device and an operation method of the display device. In the display substrate,the antenna cannot occupy a peripheral area, and realization of frame narrowing of the display device is facilitated.

The invention discloses a single-ended axial separation type magnetic suspension bearing applied to a centrifugal artificial heart pump. The magnetic suspension bearing comprises a fixed base, a suspension body, a magnet, a permanent magnet and an electromagnetic coil, wherein an upper radial permanent magnetic bearing inner magnet is arranged at the projected upper end of the fixed base; a lower radial permanent magnetic bearing inner magnet is arranged at the projected lower end of the fixed base; the electromagnetic coil is arranged at the inner edge of the fixed base; a step is arranged at the bottom end of the projected part of the fixed base; an axial permanent magnetic bearing lower magnet is arranged in the step; the inner side of the suspension body fits the fixed base in shape, the upper end is provided with an upper radial permanent magnetic bearing outer magnet corresponding to the upper radial permanent magnetic bearing inner magnet, the middle part is provided with a lower radial permanent magnetic bearing outer magnet corresponding to the lower radial permanent magnetic bearing inner magnet, the middle position of the bottom end is provided with an axial permanent magnetic bearing upper magnet corresponding to the axial permanent magnetic bearing lower magnet, and the edge position of the bottom edge is provided with the permanent magnet; and the gap suspension and the gap size between the suspension body and the fixed base are realized through controlling the current magnitude of the electromagnetic coil.

The invention relates to a water-saving device of a toilet. The water-saving device comprises a pedestal pan (3) and a pedestal pan water tank (31), wherein a water-level control device (33) and an overflow pipe (32) are installed in the pedestal pan water tank (31); after an urinal is flushed, water is automatically fed, the running water in the water pipe on the pedestal pan water tank flows out through a hand-washing pipe (6); after people wash hands, the hand-washing water flows in the pedestal pan water tank; when the water-saving device is used, no additional operation is needed, therefore, the hand-washing water after defecating is saved, and the water-saving device is convenient for use. Because only one water inlet pipe and one drainage pipe are connected between a hand basin and the pedestal pan water tank in the device, the space is almost unoccupied. The water-saving device of the toilet has the advantages of simple structure, convenience for installation or modification on facilities in the traditional toilet.

The invention relates to a bridge wing structure for an ultra-large ore carrier. The bridge wing structure for the ultra-large ore carrier comprises a bridge wing deck (1) which is placed in a transverse direction of a carrier body, wherein a vertical support (3) is fixedly connected under the bridge wing deck; a bridge wing diagonal bracing (2) is fixedly connected between the vertical support and the bridge wing deck; and the bridge wing diagonal bracing, the vertical support and the bridge wing deck form a triangular structure along the transverse direction of the carrier body. An angle between the bridge wing diagonal bracing and the horizontal direction is more than 45 DEG. The bridge wing diagonal bracing and the vertical support are both formed by plate stiffened structures. The bridge wing deck is formed by a double-layer plate in a vertical direction. Through the adoption of the bridge wing structure for the ultra-large ore carrier, provided by the invention, problems that the stiffness of a bridge wing is poor, the fixed frequency of the bridge wing is low and the bridge wing is prone to vibrate due to the overlong bridge wing can be effectively avoided. The bridge wing structure for the ultra-large ore carrier, provided by the invention, has the advantages of very high utilization value and significant using meaning.

The invention relates to a bidirectional dual-circularly-polarized folded transmission array antenna, which is composed of an upper layer of circularly-polarized transflective selective total-space chiral metasurface and a lower layer of circularly-polarized transflective selective total-space chiral metasurface integrated with a planar feed source antenna, and the metasurface is composed of a square array formed by periodically arranging a plurality of metasurface units. The feed source antenna metasurface unit is composed of a planar circular polarization microstrip patch antenna, the metasurface unit comprises three layers of metal structures and two layers of dielectric substrates clamped among the metal structures, the upper metal layer and the bottom metal layer are composed of circular microstrip patch structures of the circular polarization microstrip antenna, the middle metal layer is a metal floor with a hole in the center, and the middle metal layer is a metal substrate with a hole in the center. Metalized via holes for connecting the upper metal layer and the lower metal layer pass through the through holes; the upper-layer metasurface enables right-handed original planned waves incident in the + z direction to be transmitted and reflects left-handed circularly polarized waves. The lower-layer metasurface enables left-hand circularly polarized waves incident in the-z direction to be transmitted and reflects right-hand circularly polarized waves.

The application discloses a novel structure of a paralleling network, a battery module used for configuring the paralleling network, a battery pack heating system for the battery module, and a heatingmethod for the battery module. The paralleling network is used for assembling in the battery module to connect a plurality of battery cells in parallel, the network is a conductive material that heats up after being energized, and the paralleling network comprises at least one positive connection terminal and at least one negative connection terminal. According to the paralleling network, batterymodule, battery pack heating system and battery module heating method, the battery module is directly heated by the parallel network of the battery module itself without the need of special heating component required for the battery module. The scheme is ingenious and straightforward, the structure is simple, the implementation is convenient, the module weight is not increased, and the overall cost is reduced.

The invention discloses a multifunctional swing tool provided with a stroboscopic part, which comprises a machine shell, a motor, a transmission shaft and a working head, wherein the motor is arranged in the machine shell and is used for driving the transmission shaft to rotate; the working head is driven to swing around the axis of an output shaft by the transmission shaft through mechanical transmission; the multifunctional swing tool is characterized in that the machine shell is internally provided with a strobe light used for leading the edge position of the working head to be clearly seen, and an approach switch and an approach element which are used for acquiring the position of the working head; and the strobe light is electrically connected with the approach switch. After the multifunctional swing tool with the structure is adopted, the strobe light which is electrically connected with the approach switch can be lightened when the working head swings at a maximum angle during work, and the working head is irradiated by the light of the strobe light, so that an operator can clearly see the operation position of the working head, the material to be operated can be better aligned by the multifunctional swing tool, and the complete degree of operation can be better judged.

The invention provides an internal series type battery cell and an internal series type battery, which relate to the technical field of batteries. The internal series type battery cell comprises an outer-layer negative electrode piece, an outer-layer positive electrode piece and a battery cell series group, wherein two ends of the battery cell series group are respectively provided with a positiveelectrode end and a negative electrode end; the outer-layer negative electrode piece is connected with the negative electrode end; the outer-layer positive electrode piece is connected with the positive electrode end; the battery cell series group comprises a plurality of internal battery cell electrode pieces which are arranged in an overlapping manner; an internal diaphragm for blocking electrons from passing through is arranged between every two adjacent internal battery cell electrode pieces; every two adjacent internal battery cell electrode pieces mutually form a power supply unit; andthe plurality of power supply units are connected together in series. High output voltage can be obtained; meanwhile, the structure is simple; the running path of electrons in the battery cell seriesgroup is short; the overall internal resistance of the battery cell is reduced; no internal lead occupies space; the energy density of the battery cell can be improved; no internal lead collects current and emits heat; contact is uniform; and the reliability and the consistency of the battery cell are high.

The invention relates to a double-layer shading glass door and window, and relates to the technical field of doors and windows. An inner stile is arranged on the front side wall of an inner glass plate in a propping manner; an outer stil is arranged on the rear side wall of an outer glass plate in the propping manner; a shading assembly is fixedly arranged at the upper end of a bracket; the lowerend of the shading assembly is arranged betwween the inner glass plate and the outer glass plate in an extending manner; a transmission assembly is fixedly arranged at the right end of the bracket; the upper end of the transmission assembly is connected with the right end of the shading assembly; and the input end of the transmission assembly is arranged at the lower right end of the inner stile in a penetrating manner. According to the double-layer shading glass door and window disclosed by the invention, a shading cloth is arranged between the inner glass plate and the outer glass plate, andretracting and rolling are controlled through the transmission rod, so that retracting and rolling of the shading cloth can be realized between the inner side glass plate and the outer side glass plate, the light irradiated from the window is shaded, and the shading effect is realized; and mounting space outside the window is not occupied, and residual space between the two layers of the glass plates of the window is effectively utilized.

The present invention discloses an efficient agent adding system, which contains a PAC adding device and a PAM adding device, wherein the PAC adding device comprises a raw liquid pool, a first raw liquid pump, a first solution mixing container placed adjacent to an agent adding chamber and with an outlet communicated with the agent adding chamber, a first dilution water pump, a first flow meter arranged on the communication pipeline of the raw liquid pool and the first solution mixing container, and a second flow meter arranged on the communication pipeline of dilution water B and the first solution mixing container, and the PAM adding device comprises a dilution device, a second solution mixing container placed adjacent to an agent adding chamber and with an outlet communicated with the agent adding chamber, a solution pump, a second dilution water pump, a third flow meter arranged on the communication pipeline of the dilution device and the second solution mixing container, and a fourth flow meter arranged on the communication pipeline of the dilution water B and the second solution mixing container. Compared with the traditional agent adding system, the agent adding system of the present invention has characteristics of agent utilization efficiency improving, agent consumption reducing, and saving of tap water consumption during the agent adding process.

The invention provides a shipborne bulk material loading and unloading device. The shipborne bulk material loading and unloading device comprises a ship loading device for loading bulk materials on vehicles into a cabin, a collecting device arranged in the cabin, a lifting device arranged on one side of a ship board, a conveying device connected with the lifting device through a rubber hose and an unloading device for loading materials conveyed by the convey device onto vehicles. The collecting device comprises a transmission mechanism and a plurality of scraper blades arranged on the transmission mechanism, the transmission mechanism is formed by steel ropes or chains and a plurality of pulleys, and the steel ropes or the chains form a closed loop and can roll around the pulleys to run and drive the scraper blades to horizontally move. The lifting device is a bucket elevator. The conveying device is a spiral conveyer. The unloading device comprises a stretchable hose connected between the conveying device and a loading opening for vehicles and a plurality of dust removers arranged on other loading openings for vehicles. By means of the shipborne bulk material loading and unloading device, bulk materials can be loaded onto vehicles without occupying additional space of a wharf.

The invention relates to a double-fracture isolating switch, which comprises a cylinder body, end insulators are respectively arranged at two axial ends of the cylinder body, fixed contacts are respectively and fixedly arranged on the inner sides of the two end insulators, and the two fixed contacts are coaxially arranged; a side insulator is arranged at the side part of the cylinder body, a moving contact seat is fixedly arranged at the inner side of the side insulator, the moving contact seat is provided with two guide holes, the two guide holes are coaxially arranged, moving contacts are respectively assembled in the two guide holes in a guiding and sliding manner, and the moving contacts and the corresponding static contacts are coaxially arranged so as to be in conductive insertion connection with the corresponding static contacts; a rotating part is rotationally assembled on the moving contact seat, a connecting rod is arranged between the rotating part and the corresponding moving contact, one end of the connecting rod is hinged with the rotating part, and the other end of the connecting rod is hinged with the moving contact; the hinged positions of the two connecting rods and the rotating piece are symmetrically arranged with the rotating center of the rotating piece as the center. Compared with the staggered arrangement of the two moving contacts, the size of the double-break isolating switch can be reduced while the insulation is ensured, and the compact design is facilitated.

The invention discloses a multifunctional computer display terminal. The first side face of a fixing board is fixe to a wall face, a second side face of the fixing board is provided with a first connection base, a connection board is arranged on the back face of a display screen, and the connection board is hinged to the first connection base so that the display screen can rotate vertically; a second connection base is arranged on the back face of the display screen, and a telescopic cylinder is arranged on the second side face of the fixing board and hinged to the second connection base so asto drive the second connection base to vertically rotate; the first connection base is horizontally clamped in a first sliding groove in a sliding mode, and the telescopic cylinder is horizontally clamped in a second sliding groove in a sliding mode; a third sliding groove is arranged between the first sliding groove and the second sliding groove, and a sliding block is arranged on the back faceof a loudspeaker and clamped the third sliding groove in a sliding mode; and a goose-shaped pipe is fixedly connected with the upper portion of the first side face of the fixing board; and a switchable lighting lamp is fixedly connected with the end portion of the goose-shaped pipe. The computer display terminal can save the placement space and easily adjust the watching view angle.

The invention discloses an adjustable bookend, which comprises bookend baffle plates (1), a small groove (2), spring devices (3), pulleys (4) and a wood plate (5). The adjustable bookend is characterized in that the transverse small groove (2) and the spring devices (3) are arranged on the wood plate (5); small wood blocks are arranged at the tail ends of the spring devices (3), and are longitudinally clamped in the small groove (2) to fix the spring devices (3); the pulleys are fixedly arranged below the bookend baffle plates (1) through screws, are clamped in the small groove (2), and can horizontally move. The adjustable bookend has the beneficial effects that the adjustable fixed bookend is simple in structure and convenient to use; the distance between two bookends can be adjusted for fixation according to different requirements, books and the bookend can be moved together without disassembly, and a small space is occupied.

The invention discloses a pressure boosting pipe coiling device, which includes a shell body provided with a pipe outlet. A coiling drum is arranged in the shell body, the two ends of the coiling drumare rotatably connected with the shell body respectively, and a coiling spring is arranged between one end of the coiling drum and the shell body; a hollow cavity is formed in the coiling drum, and apressure boosting pump is fixed in the hollow cavity; a water outlet pipe is coiled on the coiling drum, one end of the water outlet pipe penetrates through the coiling drum to connect with a water outlet of the pressure boosting pump, and the other end of the water outlet pipe extends outside of the shell body through the pipe outlet; and a water inlet of the pressure boosting pump is connectedwith a rotating joint, and the rotating joint is connected with a water inlet pipe. According to the pressure boosting pipe coiling device, the pressure boosting pump is arranged in the coiling drum,sprayed hydraulic pressure is effectively enhanced, and the effect during washing is increased; according to the pressure boosting pipe coiling device, the pressure boosting pump is arranged in the coiling drum, integration of the pressure boosting pump and the pipe coiling device is realized, external spaces of the shell body do not need to be occupied, arrangement is reasonable, and the integralstructure is compact.

Embodiments of the present application provide a weight measuring method, a terminal, and a storage medium. The method comprises the following steps of: indicating that an object to be measured is placed in a first area when a weight measuring function is started, wherein the first area is an area used for weighing in the current display interface; detecting the weight of the object to be measuredby using at least one pressure sensor and the piezo-resistance effect thereof, wherein the at least one pressure sensor is arranged in the first area; and displaying the weight of the object to be measured in a second area, wherein the second area is a weight display area other than the first area in the current display interface.

The invention discloses a vehicle-body energy absorbing device and method. The vehicle-body energy absorbing device and method aim at solving problems existing in the prior art, and a novel energy absorbing structure and a flowable flexible colloidal material are adopted. Energy is absorbed by changing the physical properties and state of the energy absorbing material, and the impact energy generated by collision is absorbed through flow resistance of colloid. The vehicle-body energy absorbing device is provided with a set of movable parts which are connected and can relatively slide and a sealing cavity, and the sealing cavity is filled with solid energy-absorbing colloid; the sealing cavity is communicated with a colloid recycling cavity through a plurality of flow discharge holes for the directional flow of the solid energy-absorbing colloid; when the solid energy-absorbing colloid is squeezed, the solid energy-absorbing colloid can flow from the sealing cavity to the recycling cavity through the flow discharge holes.

The invention relates to the technical field of semiconductor CMP processing, in particular to a wafer fixing ring and CMP equipment with the same. The wafer fixing ring comprises a support part, a grinding ring installed on one side of the supporting part in parallel and telescopic assemblies, wherein a plurality of grooves are formed in the grinding ring at intervals, the grooves extend towards a supporting ring and penetrate through the grinding ring, and the telescopic assemblies are installed between the supporting part and the grinding ring, and the telescopic assemblies have a cleaning state in which the telescopic assemblies extend into the grooves to completely fill the grooves and a grinding state in which the telescopic assemblies are withdrawn from the grooves. During cleaning, the telescopic assemblies are controlled to extend to the cleaning state in the grooves, so that the telescopic assemblies fills the grooves and push out residues in the grooves at the same time, high-pressure water spraying cleaning matches, the grinding residues in the grooves can be rapidly and conveniently removed, influences of the grinding residues in the grooves on subsequent grinding and polishing wafers can be avoided, and the overall quality of all wafers in the whole batch can be greatly improved.

The invention relates to an improved neutral point grounding device for a tubular hydraulic generator and belongs to the technical field of hydraulic generator manufacturing. The device comprises a stator base, a water base ring, a three-phase neutral point lead device, a current mutual inductance device, a short-circuit copper bar and a zinc oxide arrester. The three-phase neutral point lead wire device is electrically connected with the current mutual inductance device, the current mutual inductance device end is connected with one end of the zinc oxide arrester through the short-circuit copper bar, the other end of the zinc oxide arrester is connected with the ground, and the output end of the current mutual inductance device is connected with an external monitoring device through a secondary lead wire of a mutual inductor. According to the improved neutral point grounding device for the tubular hydraulic generator of the invention, the zinc oxide arrester is grounded to form a high-resistance grounding mode, and when the generator has a single-phase grounding fault, the generator is quickly switched off, so that the damage to the generator and primary and secondary electrical equipment is avoided, and the reliability of a voltage system of the generator is improved; the neutral point grounding device is installed in bulb tubular hydroelectric generating set equipment, so that the installation is convenient, and the cost is saved.

The invention relates to a river sluice, in particular to a steel hydraulic river sluice. The steel hydraulic river sluice comprises a plurality of gate units mounted on a gate foundation, and the gate units are connected sequentially to form a water retaining device for riverway interception. Each gate unit comprises a gate body with an arc section, wherein an angle sensor is mounted at an upperposition of an arc concave face side of the gate body, lifting mechanisms for driving the gate body to move up and down are mounted widthwise at two ends of the arc concave face side of the gate body,bottoms of the lifting mechanisms are mounted on the gate foundation, and a supporting mechanism for supporting the gate body is arranged between the two lifting mechanisms. A hydraulic control mechanism for controlling the lifting mechanisms and the supporting mechanisms to operate is mounted on the gate foundation. The river sluice has advantages of ingenious structural design, low cost, high safety coefficient, long service life, convenience in mounting and freeness of geographical limitation.