908 results about "Pipe water" patented technology

The invention relates to the technical field of ecological slope protection and in particular to a semi-arid area ecological slope protection structure and a construction method thereof. The semi-arid area ecological slope protection structure comprises a slope top, a slope surface and a slope bottom, wherein a plurality of water collection grooves are formed in the edge of the slope top; a water diversion groove which can carry out diversion to the slope bottom is formed in the side surface of each water collection groove; a body of each water collection groove is formed by stacking biological stacking bags, a bentonite waterproof blanket with the thickness to be 5-10mm wraps the outer layer of the body of each water collection groove; the slope surface is composed of a planting layer and a water retention layer arranged under the planting layer; the water collection grooves are communicated with the water retention layer of the slope surface through multiple strands of capillary pipe water diversion fibers; a reservoir is formed in the slope bottom; and a self sucking pump is arranged in the reservoir and pours collected seeped water into the water collection grooves through return pipes. When collecting collected water on the slope top and flowing water on the slope surface and constructing and designing the slope surface, the semi-arid area ecological slope protection structure realizes water retention and irrigation of roots of green plants on the slope surface by virtue of the water diversion capacity of the capillary pipe water diversion fibers.

A multiuser supercharged temperature-regulated water-saving device belongs to the technical fields of regulating water temperature of a water heater in advance, supercharging and supplying water for multiple users, and saving water. A regulation group supplements cold water for a hot water tank by a connecting module so as to acquire hot water of the hot water tank, cold water, hot water and pipe water mixing temperature regulation, circulating temperature regulation and automatic temperature pre-regulation are conducted in a temperature regulation module of the regulation group, so as to supply warm water for belonged user groups; and a plurality of regulation groups supplement cold water for a plurality of hot water tanks by a plurality of connecting modules so as to acquire hot water, and each regulation group regulates warm water in advance so as to supply to the device of the belonged user group. The device mainly comprises b connecting modules (45), c regulation groups (51) and a hot water tanks (1), wherein b is of a natural number from 1, 2, 3,....N, c is of a natural number from 1, 2, 3,....N, and a is of a natural number from 1, 2, 3,....N. The device has the advantages of being capable of leading a plurality of users to share a plurality of hot water sources and separately use warm water without mutual interference, being capable of conducting automatic temperature regulation and synchronous supercharging, being wholly automatically anti-freezing, using hot water in power failure, and having no water waste in a temperature regulation process.

An improved system for draining bunkers on golf courses and other sports playing areas, and for draining landscaped areas. A receptacle is positioned below the surface for receiving drain water and for discharging the water through an outlet. A perforated pipe water collection system can be attached to the receptacle to direct water to the receptacle interior space. A receptacle cover is removable to permit access to the receptacle interior space. The cover is sufficiently strong to support the overlying weight of people and equipment, and can have apertures for permitting water entry while resisting entry of sand and other solids into the interior space of the receptacle.

The invention provides a device and method for cooling an intermediate rolled blank of a hot rolled strip. The device comprises an upper collecting pipe arranged above roller beds and a lower collecting pipe arranged between the roller beds, wherein the upper collecting pipe and the lower collecting pipe are both provided with nozzles and opening and closing control valves and are connected with a workshop circulating water system through collecting pipe water supply pipelines; and the collecting pipe water supply pipelines are provided with flow control valves. The opening and closing control valves and the flow control valves are controlled by a programmable controller. A plurality of groups of cooling collecting pipes which can be independently controlled to open and close and has smaller flow are arranged between every two roller beds, the intermediate blank is cooled by adopting water jet, and the cooling speed is correspondingly dynamically controlled according to the transmission speed of the intermediate blank. The invention has the advantages of relatively simple structure of the device, low requirement for water quality, good flow stability and high production efficiency, and is convenient to maintain and free of limit of speed raising of a roughing mill and deceleration of throwing steel; rolling mill cooling water is adopted and a single water supply and drainage system is not needed; and grains of the intermediate blank are remarkably refined, and the mechanical property of a steel plate is improved.

The invention provides an automatic mopping cleaner and a mopping robot. The automatic mopping cleaner comprises a water spraying unit, a ground cleaning unit and a waste water recycling unit, wherein the water spraying unit is provided with a multi-pipe water dripping nozzle; the ground cleaning unit is provided with a cleaning roll; the sewage recycling unit is provided with a sponge roll, a scraper blade and a sewage region; the cleaning roll is mounted in front of the sponge roll in parallel; after the water spraying unit sprays water to the ground uniformly, the cleaning roll cleans the ground; the sponge roll absorbs sewage generated when the ground is cleaned; and the sewage on the sponge roll is collected to a sewage groove by the scraper blade. The cleaning roll and the sponge roll cooperate so as to effectively clean the ground, and meanwhile, the technical problem that residual waste water exists after the ground is cleaned is avoided effectively.

The invention discloses an air intake tube water spray system of an engine. Each intake manifold leading to a combustion chamber is internally provided with a convex evaporation belt; an air intake duct general pipe is sequentially provided with a grate-type liquid drop evaporator, an air intake temperature sensor, an electromagnetic high-pressure water atomizing nozzle and an air intake flow rate sensor; the electromagnetic high-pressure water atomizing nozzle is sequentially connected with a high-pressure water pump and a water storage pump in series; an inlet end of the air intake duct general pipe is provided with a gas compressor; and a main control chip in an air intake pipe water spray electric control subsystem is respectively connected to the components above through a light beam, as well as is connected to a manual / automatic water spray water exchange switch, a cooling water temperature sensor, a power sensor, a fuel oil consumption sensor, an exhaust temperature sensor, a rotation speed sensor and the like. The intake air is ensured to have favorable water atomization under the condition of no improvement of air intake temperature as far as possible to achieve the optimal temperature control effect; and the system provided by the invention can be controlled full-automatically and exchanged manually, the system is easy to modify on the existing engine, and the control accuracy is high, and the air intake pipe water spray strategy can be regulated appropriately as the working conditions of the engine.

The invention relates to a salvage ship for cleaning suspended substances through differential pressure suction, which is composed of a ship body and a salvaging device; the ship body is a carrier for the salvaging device; the salvaging device comprises an underwater through-flow pipeline, a water pump, a filter screen, a compression air nozzle, and a suspended substance collecting hopper; the underwater through-flow pipeline is arranged in the ship body and extends from a ship head to a stern; the water pump and the filter screen are arranged in the underwater through-flow pipeline; the water pump is started and a pressure difference is formed between both ends of the underwater through-flow pipeline; mixed water of the underwater mixed suspended substances of the ship head is flowed from the ship head to the stern at high speed, and filtered by the filter screen in midway; the suspended substances in the mixed water is stopped by the filter screen, and water is sprayed out from the stern to form a pushing force for the ship advancing. The suspended substances stayed on the filter screen are blown to the suspended substance collecting hopper through the compression air nozzle. The salvage ship has the advantages of being new in design, reasonable in structure, good in suspended substance salvaging effect, high in efficiency, low in cost, energy-saving, environment-friendly, and others.

The invention discloses a mopping mechanism which has self-cleaning and sewage recovery functions and is applicable to intelligent sweeping machines. The mopping mechanism comprises a water spraying module, a drum module and a sewage collecting module, wherein the water spraying module comprises a water spraying pipe, a clean water tank and a water pump. The mopping mechanism uses a sponge mop with better mopping effect and adopts a circulating water treatment method, thus the recovery problem of sewage generated during the mopping of the ground is successfully solved. The sewage is recoveredinto a sewage collecting box on the machine, and accordingly the recovery problem of the sewage generated during the mopping of the ground is successfully solved. Meanwhile, particulate garbage, dustand the sewage generated by the mopping of the ground can be separately collected in corresponding dustbins and sewage tanks, thus the problems of the particulate garbage, the dust and the sewage aresolved. And the mopping mechanism has a sponge mop automatic cleaning function, so there is no need for frequent manual cleaning of the mop. Unlike the previous condition that the mop needs to be cleaned for several times after one use, the mopping mechanism only requires cleaning when used for several times. The mopping mechanism truly achieves a wet mopping function in the machine and saves users' time.

The invention relates to a constant-pressure water supply system which is used for enabling network pipe water pressure for water supply to be kept at a constant value. The constant-pressure water supply system comprises a frequency converter, a water pump and a pressure sensor, the pressure sensor is arranged at the position of an outlet of a network pipe and used for sensing actual pressure of outlet water of the network pipe and feeding an acquired parameter back to the frequency converter; the frequency converter is used for comparing the parameter fed back by the pressure sensor and a set value, the difference value of the parameter and the set value is converted into a frequency through calculation, the frequency should be output by the frequency converter at present, and the output frequency is used for regulating rotation speed of an asynchronous motor in the water pump; the water pump is driven by the asynchronous motor to rotate so as to supply water, and the rotation speed of the asynchronous motor is regulated through the frequency output by the frequency converter. The constant-pressure water supply system has the advantages of being high in reliability, high in anti-interference capacity, flexible in combination, simple to program, convenient to maintain, low in cost and the like. The constant-pressure water supply system is good in energy conservation and good in use effect and meets the requirements of actual use.

The invention discloses an ozone catalytic oxidation method and device. The device comprises a contact oxidation tank, a water input pipe, a booster pump, a high-efficiency dissolved-air ejector, a perforated pipe water distributor, a catalyst filling material separation plate, a catalyst filling material, an ozone air inlet pipe, an ozone tail gas air inlet pipe and an ozone tail gas destroying device. The contact oxidation tank has a multi-section shunting type, sewage flows into the contact oxidation tank from the bottom and flows out from the top, and an up-flow contact oxidation reaction route is formed. Ozone is fully mixed with sewage and dissolved through the high-efficiency dissolved-air ejector, and is distributed at the bottom of the reaction tank through the perforated pipe water distributor. The catalyst filling material separation plate is arranged at the bottom of the reaction tank, and a catalyst layer is arranged on the separation plate. The catalyst is a high-efficiency load-type catalyst with metal and metal oxide loaded on a porous carrier. Sewage and ozone are subjected to a heterogeneous catalysis reaction in the contact oxidation tank under catalysis of the load catalyst, the ozone utilization efficiency and the oxidation efficiency are raised greatly, the ozone addition amount is reduced, and the operation cost is lowered.

The invention relates to a piezoelectric pipe water flow electric generator, and belongs to the technical field of electric generation. A fluid cavity and an energy capturing cavity are formed in a body, an inlet and an outlet are formed in the side wall of the fluid cavity, and a lower cover is installed at the end of the side wall of the fluid cavity; an upper cover is installed at the end of the side wall of the energy capturing cavity, a circuit board and transducers with magnetic blocks installed at the ends are installed on two steps on the inner side of the side wall of the energy capturing cavity, and each transducer is formed by two bent piezoelectric vibrators; a boss is arranged on a partition plate of the body and provided with guide grooves, a bearing hole and a cavity, and the magnetic blocks are arranged in the guide grooves of the boss; a main shaft is installed on the lower cover and the boss through bearings and provided with a magnetic ring and an impeller, and the magnetic blocks and the magnetic ring are installed in the mode that polarity-opposite magnetic poles are close. The piezoelectric pipe water flow electric generator has the advantages that the pre-bent piezoelectric vibrators are stimulated through non-contact magnetic coupling to be deformed for electric generation, movement parts are sealed in the fluid cavity, leakage is avoided, and a circuit system is high in running stability; piezoelectric plates only bear pressure stress, so that the mechanical reliability is high; the multiple piezoelectric vibrators are stimulated by the magnetic ring at the same time, the electric generation capacity is high, and noise is avoided.

The invention relates to a shellfish collecting machine, in particular to a shellfish collecting machine capable of picking up undersea seafood such as Jiang Yao shellfish and sea cucumbers. The shellfish collecting machine comprises a rack; dual rubber tires are arranged at the front end of the rack; an iron drum spoke wheel is arranged at the rear end of the rack; the shellfish collecting machine is characterized in that a plurality of float bowls are connected to the upper end of the rack; a perforated net is mounted in the rack; a plurality of rows of scrabbling pawls are arranged outside the perforated net; a water spraying iron pipe is mounted in the front of the scrabbling pawls; a dual-pipe water spray nozzle is mounted in the perforated net of which one side is connected with a net box by a water sucking drum; the scrabbling pawls are connected with a gas cap for lifting. The shellfish collecting machine has the beneficial effects that the shellfish collecting is converted to be mechanical from manual, the efficiency is high, the operation is convenient, and the shellfish collecting machine can perform underwater operation for a long term, is high in pressure-resistant depth, can work at both day and night, is safe and reliable and low in fault rate, avoids casualty and provides guarantee for people to obtain the delicious food on a dining table.

The invention discloses a method for reducing a water flow of an air conditioning system and a dynamic temperature difference flow regulating valve. The air conditioning system is composed of devices of a cooling main machine, a heating main machine, a water pump, a fan, a heat exchanging coil pipe and the like. The dynamic temperature difference flow regulating valve comprises a water flow regulating valve, a driver, heat exchanging coil pipe water inlet and outlet temperature sensors, a controller, an indoor air temperature sensor, an indoor air temperature setting device or an indoor cooling and heating load calculator. In the cooling work condition, the controller independently runs after the temperature sensors detect water temperatures and always keeps temperature difference of inlet and outlet water to be at the optimum value so that cooling and dehumidification effects can be guaranteed, and the phenomenon that large flow and small temperature difference occur to a water system is avoided; in the dry cooling work condition or the heating work condition, the controller always keeps the temperature difference of the inlet and outlet water to be at the maximum value according to the indoor air temperature sensor and the indoor air temperature setting device or the indoor cooling and heating load calculator, namely, the dynamic temperature difference flow regulating valve can achieve minimum flow operation in multiple work conditions, and energy consumption of the water pump is further reduced.

The present invention relates to a casing hydraulic pulse flushing device. It is composed of jet flow head, sand-cleaning nozzle, couple nozzle, cleaning nozzle, damper, guider, pin bolt, flushing pipe and filter. Said invention also provides their connection mode and working principle of said flushing device.

The invention discloses a continuous laying and water-saving pressure testing construction method of a long-distance water pipe. The method comprises the steps of designing and manufacturing of a fabricated pipe pressure testing device, groove excavation, mounting of the water pipe, mounting of the fabricated pipe pressure testing device, construction of a water filling system, pipe water filling, pipe pressure testing, drainage and pipe connection. The defects in the traditional pressure testing technology are overcome, a large number of waste resources can be saved, pipe laying construction does not need to be stopped during pressure testing, and the method has the beneficial effects that the construction progress is quick, construction is safe and reliable, and construction cost is reduced.

The invention relates to an automatic pressure regulating method and a device for a coke oven chamber, which is characterized in that the lower end of a cylinder of a bridge pipe water sealing valve device is an inclined surface, the inclined surface is formed by inclining downwards towards the nearest (farthest) end from the farthest (nearest) end of a water sealing valve disc shaft of the bridge pipe water sealing valve device in a mode of oblique lines with same slope or broken lines and curve contours with different slopes, rotation of the water sealing valve disc shaft enables one end of the water sealing valve disc shaft closing to the inclined surface to firstly sink into a water sealing valve disc, a gas channel is formed between the upper end of the inclined surface and the water sealing valve disc, and size of gas flow is controlled by the opening size of the water sealing valve disc. The device is used for controlling the pressure of single coke oven chamber, realizes no overflow of soot when coals are charged in a coke oven and in coking period, avoids negative pressure occurring in the coking chamber in coking terminal, and prevents air from leaking into the coking chamber to burn coke and damage the oven body; the equipment has simple structure, low manufacture cost and low operation and maintenance requirement, and is easy to manufacture.

The invention relates to a steel pipe water pressure detection device with an automatic steel pipe clamping function, belonging to the technical field of a steel pipe water pressure testing machine. The steel pipe water pressure detection device comprises a stander, wherein the stander comprises a left front stand column, a left rear stand column, a right front stand column, a right rear stand column, a front supporting beam, a rear supporting beam, a fixed bracket, a slide adjusting frame, a left beam frame and a right beam frame. The steel pipe water pressure detection device is characterized by also comprising an automatic steel pipe left clamping mechanism, a steel pipe water injection mechanism, an automatic steel pipe right clamping mechanism and a steel pipe end opening sealing mechanism, the automatic steel pipe left clamping mechanism and the steel pipe water injection mechanism are arranged on the left end of the stander, and the steel pipe water injection mechanism is arranged on the left side of the automatic steel pipe clamping mechanism; the automatic steel pipe right clamping mechanism and the steel pipe end opening sealing mechanism are arranged on the right end of the stander, the position of the automatic steel pipe right clamping mechanism corresponds to the automatic steel pipe left clamping mechanism, the position of the steel pipe end opening sealing mechanism corresponds to the steel pipe water injection mechanism, and the steel pipe end opening sealing mechanism is arranged on the right side of the automatic steel pipe right clamping mechanism. By adopting the steel pipe water pressure detection device with the automatic steel pipe clamping function, the operating intensity of online detection personnel can be alleviated, and the safety can be guaranteed.

The invention provides a heat pump unit and cold water unit coupled four-pipe air conditioner system with double water collection and distribution devices and a use method of the heat pump unit and cold water unit coupled four-pipe air conditioner system. The heat pump unit and cold water unit coupled four-pipe air conditioner system has the economical, healthy, comfortable, environmental-friendly and energy-saving functions. The manner that a cold water unit is combined with a heat pump unit is adopted for a main machine. A two-pipe water producing system is adopted for the region needing the cold load in summer and only needing the heat load in winter, a four-pipe water producing system is adopted for the region needing the cold load in summer and needing both the cold load and the heat load in winter, and the purposes that cold is supplied in summer, heat is supplied for some region in winter, and cold and heat are supplied to part of the region at the same are achieved. A two-pipe air conditioner system process built by a traditional cold water unit and a heat pump unit is improved, and through the manner that the cold water collection and distribution device and the hot water collection and distribution device are arranged on an air conditioner and the valve switching manner, the heat pump unit and cold water unit coupled four-pipe air conditioner system with the double water collection and distribution devices is built. By means of the heat pump unit and cold water unit coupled four-pipe air conditioner system, the temperatures of all air conditioner regions are controlled precisely, the indoor comfort is improved, and the heat pump unit and cold water unit coupled four-pipe air conditioner system has the beneficial effects of being safe, healthy, comfortable, capable of saving energy and protecting the environment and the like.

The invention relates to a steel pipe water-filling pressure intensity test table, which belongs to the technical field of machinery processing and is applied to a steel pipe hydraulic water-pressure test machine. The steel pipe water-filling pressure intensity test table comprises two parallel elastic sliding rods, wherein two ends of each rod are provided with a frock locating plate and a three-pawl self-locating core sliding plate; the middle part of a movable rod is provided with a cylinder elastically-moving locating plate, an elastic pressure cylinder and a water-pressure increasing machine are arranged between the moving locating plate and the frock locating plate, and a three-pawl chuck moving plate is arranged between the moving locating plate and the three-pawl self-locating core sliding plate; a positive pressure spring is arranged along each rod between the moving locating plate and the three-pawl chuck moving plate, and a pressure-reducing steel pipe sealing device is connected with the water pressure increasing machine after passing through the moving locating plate and the water pressure increasing machine; a back pressure spring is arranged along each rod between the three-pawl chuck moving plate and the three-pawl self-locating core sliding plate; one end of a three-pawl self-locating core clamping device is fixed to the three-pawl self-locating core sliding plate; and the other end of the three-pawl self-locating core clamping device is in movable fit with the three-pawl chuck moving plate. The steel pipe water-filling pressure intensity test table provided by the invention is capable of clamping a steel pipe by automatic centering without destroying the shape of the steel pipe, and is good in sealing property, simple and safe to operate.

A combined axial flow gas-solid phase fixed bed catalytic reactor capable of producing steam by product comprises a cylinder body, an upper end plate, an heat insulating reaction section, an in-pipe water cooling section, and a lower end plate. Two heat insulating layers are disposed on the heat reaction section; a material gas cold shocking device including a cold shocking distributor and a cold shocking pipe is disposed in the back of each heat insulating layer. A heat exchange medium manifold, an in-pipe water cooling section catalyst bed, heat exchange pipes, a heat exchange medium distribution pipe and a lower support plate are disposed in the in-pipe water cooling section. Cooling medium is filled in the heat exchange pipe. The catalyst is filled between the heat exchange pipes and has a filling height 50-95% of total height of the reactor catalyst layer. The reactor is specially design based on the characteristics of a reversible exothermic reaction, has the advantages of simple structure, convenient charge / discharge of catalyst; easy heating reduction of catalyst, simple temperature regulation of catalyst bed, recovery of high potential energy reaction heat and steam byproduct, and is suitable for large-scale chemical production.

The invention relates to a purifying treatment technology of coke wet quenching steam. The purifying treatment technology comprises the following steps of sending the primarily purified steam in a coke wet quenching tower into a steam absorbing tower, fully touching and exchanging heat with industrial circulating water in a primary coiled pipe water cooler and a secondary coiled pipe water cooler, and draining condensate into a coke powder settling tank; sending the tail gas after heat exchange into a cyclone separator through a tail gas pipeline to be purified for the second time, and sending the separated dust, water droplets and other pollutants into the coke powder settling tank; sending the tail gas after secondary purifying into a tail gas treatment device, using the heat of high-temperature steam to heat the unabsorbed water steam and air in the tail gas to the unsaturating state, sending the separated dust, water droplets and other pollutants into the coke powder settling tank, emitting the heated tail gas through a chimney after the heated tail gas reaches standard, and avoiding production of white fog in the emission process. The purifying treatment technology has the advantages that the route is simple and rapid, and the investment cost is low; a large amount of high-temperature steam produced in the coke wet quenching process is fully purified, and the standard emission of the tail gas in the coke wet quenching process is realized, specially emission of no white fog.

The invention relates to a food cooking installation comprising numerous cooking tanks which are used to receive the food items to be cooked; means of loading / unloading the food items into / from said cooking tanks; and means of conveying, driving and storing liquids, which are used to connect a heated liquid container, a cooled liquid container and a piped water delivery point with the aforementioned cooking tanks. In this way, the tanks can be filled and emptied independently and the food items contained therein can be subjected to successive baths for different periods of time and at different temperatures, at least one of the baths being a cooking bath and the other a cooling bath. According to the Invention, each of the aforementioned cooking tanks comprises at least one lateral opening which is equipped with impervious sealing means and which is used to load / unload the food items using the above-mentioned loading / unloading means.

The invention discloses a steel pipe water pressure detecting device and belongs to the technical field of steel pipe water pressure testing machines. The steel pipe water pressure detecting device comprises a rack, a left steel pipe clamping mechanism, a steel pipe water injecting mechanism, a right steel pipe clamping mechanism, a steel pipe opening sealing mechanism, a left steel pipe lifting mechanism, a right steel pipe lifting mechanism and a steel pipe dragging mechanism, wherein the left steel pipe clamping mechanism and the steel pipe water injecting mechanism are arranged at the left end of the rack; the right steel pipe clamping mechanism and the steel pipe opening sealing mechanism are arranged at the right end of the rack; the left steel pipe lifting mechanism is supported on a terrace and corresponds to the right side of the left steel pipe clamping mechanism, and the right steel pipe lifting mechanism is supported on the terrace and corresponds to the right side of the right steel pipe clamping mechanism; the steel pipe dragging mechanism is supported on the terrace and corresponds to the middle part of the rack. The steel pipe water pressure detecting device has high detection efficiency and allows a steel pipe manufacturer to carry out comprehensive detection on produced steel pipes, and the overstock of steel pipes to be detected can be avoided; the labor intensity of online detection workers is reduced, and the safety is ensured; the steel pipe manufacturer can conveniently control the quality of the produced steel pipes, and the phenomenon that unqualified defective steel pipes are mixed in qualified steel pipes is avoided.

The invention relates to a determination method for an incipient cavitation number of a flattop pore plate. According to the method, factors influencing the incipient cavitation number are determined,wherein the factors include a pipe water flow Reynolds number, a specific value of a pore plate diameter to a flood discharging tunnel diameter and a specific value of pore plate thickness to the flood discharging tunnel diameter; a numerical simulation model of water flow passing through the flattop pore plate is established based on an RNG k-epsilon model; a calculation method of the incipientcavitation number is determined based on the RNG k-epsilon model; and the numerical simulation result is analyzed and fitted, and an empirical expression between the incipient cavitation number and the factors influencing the incipient cavitation number is determined. The method has the advantages that a quantitative relation between the incipient cavitation number and the pipe water flow Reynoldsnumber, the specific value of the pore plate diameter to the flood discharging tunnel diameter and the specific value of the pore plate thickness to the flood discharging tunnel diameter is obtained,so that the method is suitable for direct application to a real project.

The invention discloses a drainage pipe structure for an automobile air conditioner, which comprises a housing, a rubber drainage pipe and a housing drainage pipe arranged on the housing, wherein a drainage pipe water inlet is formed on the rubber drainage pipe, and the end of the housing drainage pipe is inserted into and connected with the drainage pipe water inlet. With the structure, the drainage pipe structure has the advantages as follows: (1) the cost is low, no binding tape is needed, no tool is needed, and the installation operation is convenient; and (2) as the protrusion on the plastic housing is engaged with the hole in the rubber drainage pipe, the effects of both fixing and positioning the rubber drainage pipe are achieved, the assembly process is very simple, the drainage pipe is prevented from falling off after assembly, and the reliability is high. Besides, based on the feature that rubber is elastic, the rubber drainage pipe and the plastic housing are in interference fit, so as to improve the leak tightness between the plastic housing and the drainage pipe and avoid water leakage at the assembly site.

The invention discloses an electric duct pipe water-jet propeller. The water-jet propeller is smaller than the conventional size, has the characteristics of light weight, simple structure and easy control, and can meet the installation and control requirements of small robot platforms. The electric duct pipe water-jet propeller includes: a shell fixation unit and a motor driving unit; the shell fixation unit includes: a water inlet cover, a shell, a guide guard and a water jet cover that are coaxially connected in order; the motor driving unit includes: a motor and screw propellers; the motoris fixed inside the guide guard, and the power output shaft of the motor serves as a rotating shaft and is toward the direction of the water inlet cover, the screw propellers are connected to the rotating shaft, and rotate under the driving of the rotating shaft. The water-jet propeller with the structure provided by the invention can realize rapid underwater motion of an underwater robot and floating and submergence of a robot because of large thrust.

A modular PE pipe water activity platform comprises a PE pipe floating body, single-section floating raft platforms and a floating raft guardrail, wherein the PE pipe floating body is formed by connecting a plurality of hollow PE pipes of which both ends are sealed; each single-section floating raft platform is of a reinforced concrete structure; the single-section floating raft platforms and the PE pipe floating body are connected into a whole by a fixing frame; plurality of the single-section floating raft platforms are fixedly connected into a floating raft platform assembly; and the floating raft guardrail is fixedly installed on the floating raft platform assembly. According to the invention, the characteristics of light weight, corrosion resistance, long service life, capability of being recycled and high strength of reinforced concrete of the PE pipe are fully combined, manufacturing and construction are simple, safety and reliability are realized, and maintenance is simple. Due to the adoption of modular production and flexible assembly, the water-surface construction operation difficulty of a large platform is greatly reduced, the construction cycle is shortened, and economic benefits and environmental benefits are greatly enhanced.

The invention discloses a urinal water supply and drainage device. The upper end of a water supply pipe is arranged in a water supply and drainage tank. A pedal plate is arranged under the tank. An elastic reset component and a water supply valve are arranged under the pedal plate. The water supply valve is connected with the water supply pipe. The upper end of the water supply pipe is provided with a water supply pipe water outlet, and the pipe on the upper end is internally provided with a top plug. The top plug is connected with one end of a lever in the tank, and the other end of the lever is connected with a tank drainage port flip in a suspended manner. The tank drainage port flip is provided with a sealing portion. The tank is internally provided with a pull rod fulcrum which supports two ends of a pull rod to move up and down. When the pedal plate is stepped by a foot, the water supply valve is automatically opened to supply water to the tank, and meanwhile the top plug is jacked up, so as to drive the other end of the lever to press downward the tank drainage port flip, to seal and close off the tank water outlet. When the foot leaves the pedal plate, elastic force makes the water supply valve close, the top plug goes down to drive the other end of the pull rod to lift up the tank drainage port flip, and water in the tank is drained to a urinal to flush the urinal through the tank water outlet. The device prevents bacterial infection by contacting the buttons by a finger, and use is more sanitary.