74results about How to "Improve water delivery efficiency" patented technology

The invention relates to a method and a device for automatically controlling water levels of multiple channel sections. The device comprises a water delivery open channel and a plurality of gates, wherein a water-dividing opening is reserved at a place close to the upstream of each gate; a gate opening and closing mechanism of each gate is connected with a control unit of each gate; and the control units are connected through a network. The control unit comprises a gate-front water level sensor, a gate-rear water level sensor and a gate open degree sensor, wherein the gate-front water level, gate-rear water level and the gate open degree sensors are connected with a low pass filter; the low pass filter is connected with an A / D converter; the A / D converter is connected with a data acquisition unit; the data acquisition unit is connected with an industrial control computer; the industrial control computer is connected with a PLC; and the PLC is connected with the gate opening and closing mechanism. Due to the adoption of upper and lower stream data acquisition, gate and water flow control simultaneously, the method and the device avoid the influences of long time delay and coupling effect of the long-distance large-scale water delivery open channel and give full play to the advantages of the upstream control and the downstream control method in the water level regulation and water quantity regulation.

The invention relates to a large-scale open channel water level automatic control method based on storage capacity dynamic regulation. The method comprises the steps of determining a feed-forward flow regulating value; determining whether the feed-forward flow regulating value needs to be subjected to feedback correction or not; calculating a feedback correction value of a feed-forward control flow; calculating a flow regulation target value; calculating the actual opening of a gate; adjusting the opening of the gate. The method disclosed by the invention adopts a feed-forward flow control mode and fully considers the influences of division flow and water level dead areas for controlling a water surface profile of the whole channel section, so that water level fluctuation at local points can be flattened and filtered out, the sensitivity to movement dead areas of the gate is reduced, and accordingly frequent operation for the gate is reduced. Storage capacity compensation conditions required by stable water delivery are conveniently realized, so that the phenomenon of water level overswing is effectively reduced, and stability can be more quickly realized. The control principle is simple and clear and easy to realize and grasp, the influences of various disturbance factors can be effectively avoided, the operation and management cost of an open channel is reduced, the water delivery safety is ensured, and the water delivery efficiency is improved.

The invention discloses a water hammer air valve and a water hammer gas discharging method during pipeline use. The water hammer air valve comprises a valve body, a bonnet and a protective cover, wherein the bonnet is provided with an opening, the protective cover is disposed on the opening, the valve body is provided with a valve opening for being communicated with a pipeline, a high-speed gas feeding and discharging device which is used for discharging gases stayed in the pipeline during water filling to the outside and shutting down the valve after pipeline water filling is completed is disposed in the inner cavity of the valve body, the output end of the high-speed gas feeding and discharging device is communicated with the outside through the opening of the bonnet, and the valve opening of the valve body is communicated with a bottom gas discharging throttling device for limiting the gas displacement of the pipeline to the inner cavity of the valve body; a trace gas discharging device for discharging mixed, residual and / or precipitated gases in the pipeline to the outside through the opening of the bonnet after the high-speed gas feeding and discharging device shuts down the valve is further disposed in the high-speed gas feeding and discharging device. By the water hammer air valve, water hammer reduction and pipeline safety protection are achieved, blowing blocking during high-speed gas discharging is avoided, and valve closing water hammer is eliminated.

The invention relates to a method and system for automatically controlling the water level of an inverted siphon in an open channel. The system comprises an open water channel section, wherein an inverted siphon is connected with the lower reach of the open water channel section in series; a working gate is arranged at the outlet of the inverted siphon; a check gate is arranged at the upper reach of the open channel section; the check gate is provided with a water level sensor in front of the check gate, a water level sensor behind the check gate and a check gate opening sensor; a check gate opening and closing mechanism of the check gate is connected with a check gate PLC (programmable logic controller); and the water level sensor in front of the check gate, the water level sensor behind the check gate, the check gate opening sensor and the check gate PLC are connected with a control and data processor. In the invention, as the check gate is arranged on the open channel section and is provided with the water level sensor in front of the check gate and the water level sensor behind the check gate which are matched with a water level sensor and a flow sensor which are arranged at the outlet of the inverted siphon, the optimal control data are obtained by analyzing and computing the obtained data and the water level is preciously controlled according to the data, thus ensuring safe and efficient operation.

The invention discloses a cubic parabola shaped waterpower optimal section of a water conveying open channel, and a solving method for the cubic parabola shaped waterpower optimal section. The waterpower optimal section employs a cubic parabola shaped section, and is expressed as y=ax<3>, wherein the optimal width to depth ratio is B / h=2.1139, the shape coefficient a=0.8469h<-2>, and the side slope coefficient of a water surface is z=1 / 6* B / h=0.3523. The solving method comprises the steps: firstly designing the shape of the waterpower section of the water conveying open channel as the cubic parabola shaped waterpower section, and solving the characteristics of the waterpower section; secondly building a solving model for the waterpower optimal section; thirdly solving a differential equation of the waterpower optimal section through employing the Lagrangian multiplier method; fourthly enabling a wetted perimeter to be expressed as an expression of a complete elliptic integral function in a complex field range; and finally converting an optimal section problem into an equation with one unknown quantity in the complex field range, and obtaining the width to depth ratio of the waterpower optimal section. The waterpower optimal section is larger in discharge capacity under the condition of equal area or wetted perimeter, facilitates the improvement of the water conveying efficiency, and is low in construction cost.

The invention provides a metal tube taking a plastic tube as a liner and a manufacturing method of the metal tube. The metal tube taking a plastic tube as a liner comprises a metal tube and a plastic composite tube stock; the plastic composite tube stock is formed by an outer layer hot melting adhesive layer and an inner layer plastic tube; plastic composite tube stock is manufactured online, the inner wall of the metal tube is subjected to sand blasting and shot blasting or grit blasting after being polished, the plastic composite tube stock is pulled into the well-processed metal tube, and the two ends of the plastic composite tube stock are sealed and inflated and are placed in a sealed steam room or baking room to be heated, such that the metal tube and the plastic composite tube stock are adhered fixedly, and trimming and spraying are performed. The invention further comprises a manufacturing method of the metal tube taking a plastic tube as a liner. The sealed steam room or baking room is adopted for heating, the product quality is stable, and percent of pass is high; a plurality of or even different models and types of tube stocks can be heated simultaneously, the total heating time is less, the production efficiency is high, the energy consumption cost for product heating can be saved, plants and production devices for production can be saved more, and investment cost is reduced.

The invention discloses an air valve. The air valve comprises a valve body, wherein a valve cavity with a bottom opening is formed in the valve body, a rapid exhaust passage communicating with the valve cavity is arranged at the upper end of the valve body, a valve element mechanism capable of moving up and down is arranged in the valve cavity, the rapid exhaust passage can be closed or opened inthe process of moving up or down of the valve element mechanism, and a signal feedback device used for detecting a signal of the movement position of the valve element mechanism is arranged in the rapid exhaust passage. According to the air valve, through the signal feedback device arranged in the rapid exhaust passage and used for detecting the signal of the movement position of the valve elementmechanism, real-time monitoring of the movement position of the valve element mechanism is achieved, and timely feedback is sent to a technician when a problem occurs, so that the condition that timely processing cannot be achieved after the valve element mechanism is stuck is avoided.

The invention provides a lining plastic pipe cast iron pipe and a manufacturing method thereof. The lining plastic pipe cast iron pipe comprises a cast iron pipe body and a plastic composite pipe material; the plastic composite pipe material is composes of an outer layer hot melt glue layer and an inner layer plastic pipe; the plastic composite pipe material is manufactured on line; the inner wall of the cast iron pipe body is subjected to sand blasting, shot blasting or shot throwing treatment after being ground; the plastic composite pipe material is pulled into the treated cast iron pipe body; the two ends of the plastic composite pipe material are subjected to sealing and gas filling; after heating treatment, cooling is performed; and the cast iron pipe body and the plastic composite pipe material are cemented, and trimming, spraying and marking are performed. The invention further discloses the manufacturing method of the lining plastic pipe cast iron pipe. By means of the lining plastic pipe cast iron pipe and the manufacturing method thereof, the defects of an existing cement mortar lining modular cast iron pipe and epoxy resin and epoxy ceramic lining modular cast iron pipes can be overcome, and the lining plastic pipe cast iron pipe is suitable for the water supply, fuel gas, water discharging, sewage discharging, heating and other fields, and is a most ideal water delivery pipe material product at present.

The invention relates to the field of water control valves, in particular to a valve body with a filtering function. The valve body comprises a valve shell, wherein the left and right sides of the valve shell are fixedly provided with a water inlet connecting pipe and a water outlet connecting pipe respectively, the center of the inner portion of the valve shell is rotatably in fixed-axis connection with a rotating shaft, the rotating shaft is fixedly provided with a filter net, the water inlet connecting pipe is connected with an intermittent reciprocating mechanism and is connected with therotating shaft through the intermittent reciprocating mechanism, the lower side of the valve shell is fixedly provided with a discharge pipe, the joint of the discharge pipe and the valve shell is fixedly provided with a brush frame cleaning the filter net, and an outlet end of the discharge pipe is provided with an automatic discharge mechanism. The valve body with the filtering function can automatically perform cleaning, keep the stable discharge value of the filter net and improve the water delivery efficiency so that the water pressure in the valve body can be kept stable in time, therefore, structural parts in the valve body are not damaged by the excessive water pressure, the pipe is also prevented from being broken, automatic discharge can also be achieved, and the time and labor are saved.

The invention discloses an integrated sewage treatment device. The integrated sewage treatment device comprises a combined frame, a support base frame, a crossed assembling fastener, a rotary meshed cylinder, an extending cylinder and a collecting tank, wherein the rotary meshed cylinder is movably mounted inside the bottom of the combined frame, the outer surface of the bottom end of the rotary meshed frame is fixedly provided with a mounting support, the outer surface of one end of the rotary meshed cylinder is movably provided with a rotary assembling base, and the outer surface of the other end of the rotary meshed cylinder is fixedly provided with a shell flange via butt joints; the middle of the outer surface of the rotary assembling base is fixedly connected in a sleeve mode with awelding elbow, the upper portion of the rotary assembling base is movably provided with two groups of rotary inner rods, and the rotary assembling base and the rotary inner rods are fixed via butt joints by transmission rods. By means of a rotary structure, the integrated sewage treatment device can increase the sewage discharging speed, facilitate maintenance operation, improve the sewage input efficiency and bring out better use experience.

The invention discloses a production method of a titanium three-way tube which is applied to the water conveying environment. The production method comprises the steps of billet tube manufacturing, cold expanding forming, hole punching, second time of forming, shaping, side pipe connecting and connector installing. The titanium three-way tube comprises a main tube, a branch tube is installed on the main pipe, a side tube is welded to an opening of the branch tube, a tube connector is installed at the tube end of the side tube. The titanium three-way tube is a thin-walled three-way tube made through cold machining forming of a pure-titanium tube, all aspects of excellent performance of corrosion resistance, low density, high specific strength and the like of titanium materials is kept, the technical problem that a welding joint cannot be arranged in a liquid junction is solved, connection through a non-three-way mode such as welding through flange discs is avoided, titanium flange type connectors are arranged at the tube ends, direct connection of a water conveying pipeline is achieved, liquid conveying resistance is small, the occupied space is small, the overall weight is small, water conveying efficiency is high, installing is efficient, fast and convenient, maintaining is convenient, cost is low, and the titanium three-way tube can be widely applied to the water conveying environment.

The invention provides a damaged hardened channel underwater repair device, and relates to the technical field of water conservancy channel repairing. The technical problem of affected water transportwork due to the fact that a damaged hardened channel is repaired by generally adopting water supply cutting off operation, the damaged hardened channel underwater repair device comprises a working cabin, a drainage device, and a channel for entering the cabin, wherein the working cabin comprises a cover body, and the cover body is placed at the channel damaged position and jointly forms the working cabin with the surface of the channel; the drainage device communicates with the working cabin, the drainage device is capable of injecting high-pressure air into the working cabin and draining water from the working cabin, and thus the inner space of the working cabin is isolated from water in the channel; and the channel for entering the cabin communicates with the working cabin, and construction personnel or maintenance equipment can enter the working cabin through the channel for entering the cabin to repair the channel damaged position. According to the damaged hardened channel underwater repair device, the damaged hardened channel can be repaired underwater.

The invention discloses a water conveying tank for water conservancy project construction in the technical field of water conservancy projects. The water conveying tank comprises a water conveying tank body, wherein baffles are arranged in the middles of the inner walls of the left side and the right side of an inner cavity of the water conveying tank body; first sliding grooves are formed in the middles of the upper end faces of the baffles; rollers are evenly arranged in inner cavities of the first sliding grooves; connecting columns penetrate the centers of the end faces of the rollers; mounting plates are arranged on the upper end faces of the connecting columns; mounting boxes are arranged in the centers of the upper end faces of the mounting plates; servo motors are arranged in inner cavities of the mounting boxes; motor shafts of the servo motors penetrate the mounting plates to the lower end faces of the mounting plates; the lower end faces of the motor shafts of the servo motors are fixedly connected with threaded rods; the middles of the outer walls of the threaded rods are sleeved with sliding sleeves; and dredging devices are fixedly connected to the left sides and the right sides of the sliding sleeves. The device is simple in structure and convenient to operate, sludge in the water conveying tank is effectively removed, and the water conveying efficiency is improved.

The invention discloses a design method and a design device for a long-distance high-altitude water delivery line. The design method comprises the steps of obtaining the geographical environment of awater delivery line, and establishing a water delivery model; screening out a plurality of preliminary routes from a starting point to an end point in the water delivery model; calculating the pipeline length of each preliminary route; according to the weighting relation in the preset specific gravity coefficient distribution table, weighting the number of the booster pump stations, the high-levelpools, the water delivery pump stations and the flow and pressure regulating valve chambers of each preliminary route and the pipeline length respectively, and calculating the weighted sum; sorting all the preliminary routes according to the sequence of the weighted sums from small to large, and selecting the preliminary route with the minimum weighted sum as a water delivery route; calculating the water delivery lift of the water delivery route; and setting equipment information and each system according to the water delivery lift. The design of the water delivery line is achieved, the waterdelivery cost is greatly reduced, equipment resources and water resources are utilized to the maximum extent, and the water delivery effect and the water delivery efficiency are improved.

The invention discloses a construction method of a stone pitching structure of a tidal face of a tidal-flat area. The construction method comprises the following steps: a, carrying out staking out insurvey in a construction site, then excavating a base layer, and leveling the surface of the base layer; b, structurally constructing a water retaining surface; c, constructing a first stone layer; d,constructing a second stone layer; e, constructing a pitching structure; and f, spraying and cleaning water to the pitching structure with a high pressure water gun. The construction method disclosedby the invention improves the invasion ability of a defense water flow, improves the water conveying efficiency and prevents a ponding phenomenon of the pitching structure, and meanwhile, the stone pitching structure is good in erosion resistance and durability. By carrying out structural construction of the water retaining surface, construction of the first stone layer, the second stone layer and construction of the pitching structure successively from bottom to top, the influence of water flow scouring is reduced in the construction process, and the pitching building blocks can be paved ina positioned manner, so that the construction quality of the stone pitching structure is improved.

The invention discloses a vacuum jet siphon drainage equipment monitoring system based on a PLC, which comprises a vacuum jet siphon water taking system consisting of a submersible vacuum jet rectifier, a siphon and a siphon outlet regulating valve, a vacuum power system consisting of a vacuum tube stop valve, a water ring vacuum pump, a buffer tank, a liquid-gas exchange box and a make-up pump, an automatic monitoring control system consisting of the PLC, a touch screen, a motor control relay, a flow signal sensor, a pressure signal sensor, a temperature signal sensor, a water level signal sensor and a motor comprehensive protector which are electrically connected with the PLC, and a valve opening degree sensor. The motor comprehensive protector and the motor control relay are respectively connected with a motor of the water ring vacuum pump, and the PLC is electrically connected with the siphon outlet regulating valve and the vacuum pipe cut-off valve. The system is used for improving the water conveying efficiency of the siphon pipeline, automatic operation and continuous controllability of the system are achieved, and the system has the advantages of being simple in structure, reliable in operation and high in integration degree.

The invention discloses a three-stage exhaust and waterproof hammer type air valve, which relates to the technical field of pipeline conveying water exhaust. An air cylinder and a holding cavity are arranged in a lower valve body; a guiding protection cylinder is arranged on the lower end of the holding cavity; an opening is formed in the bottom part of the guiding protection cylinder; a floater is arranged in the holding cavity; a drainage hole is formed in the bottom part of the lower valve body; the floater is formed by an upper floater and a lower floater; the upper floater is formed by anupper floater component I and an upper floater component II; an opened holding piston is arranged between the upper floater component I and the upper floater component II; a trace exhaust port is formed in the piston; a piston cylinder is arranged on the bottom end of the upper floater component II; a piston cylinder vent hole is formed in the middle of the piston cylinder; a small-amount exhaustport is formed between the piston and the upper floater component I; an upper valve cover is connected to the top part of the lower valve body; a big exhaust port is formed in the middle of the uppervalve cover; and the pore diameter of the big exhaust port is smaller than the diameter of the upper floater. The three-stage exhaust and waterproof hammer type air valve provided by the invention has the beneficial effects that the phenomena of valve sealing and metal run out can be effectively avoided, and the three-stage exhaust and waterproof hammer type air valve is not easy to damage, highin exhaust efficiency, and less in environment pollution.

The invention relates to the technical field of design of biological channels, in particular to ecological type biological channels arranged in a concrete-lined channel in a subsection mode. A plurality of arrayed hollow bricks (20) are arranged on a side slope (1) in a subsection mode. Through holes are formed in each hollow brick. Inner hole soil (3) is arranged in each through hole. Inner hole vegetation (4) is arranged in the upper surface of each inner hole soil (3). The biological channels improve water-carrying capacity and water-carrying efficiency of a ditch system, enable living beings in an irrigation area to do activities, ensure that animals can conveniently go ashore or go off a ditch, improve biological diversity and ecological functions, and achieve perfect combination of safety, stability, landscape, naturality and hydrophilia.

The invention discloses a water pump assembly and a dishwasher with the same. The water pump assembly includes a shell, a water inlet pipe, a tension band, an impeller and a motor. An accommodating cavity is defined in the shell. The accommodating cavity is provided with a water outlet and a water inlet. One end of the water inlet pipe is arranged at the water inlet in a matched mode. The tensionband is arranged in the water inlet pipe in a sleeved mode, and the water inlet pipe is fastened to the inner peripheral wall of the water inlet. Inner ring protrusions and outer ring protrusions arearranged on the side, facing the water inlet, of the impeller. Both the inner ring protrusions and the outer ring protrusions are arranged around the rotation axis of the impeller. The outer ring protrusions are arranged at intervals outside the inner ring protrusions. The motor is connected with the impeller to drive the impeller to rotate. The ends, facing the impeller, of the water inlet pipe and the extension band both extend into the accommodating cavity. The outer ring protrusions are located on the radial outer side of the end part of the water inlet pipe, and the inner ring protrusionsare located on the radial inner side of the end part of the extension band. According to the water pump assembly, the liquid backflow between the impeller and the shell is reduced, and the hydraulicefficiency of the water pump assembly is improved.

The invention discloses a multi-stage pump middle section double-impeller slope flow channel, and relates to the technical field of water pump. The channel comprises a plurality of water guide components, the water guide components comprise middle section guide vanes and impellers, the middle section guide vanes comprise front cover plates and rear cover plates, a plurality of vortex-shaped flow guide vanes are arranged between the front cover plates and the rear cover plates in a inclined manner, a plurality of openings are arranged at the edge of the front cover plates, the openings are located between the adjacent flow guide vanes, and the openings expose parts of the rear cover plates; and the impellers comprise front plates which communicate with shaft sleeves for connecting a wheel axle, a plurality of vortex-shaped drainage blades are arranged on the peripheral side of the shaft sleeves in a inclined manner, the side of the drainage blades far away from the front plates is fixedprovides with a water inlet ring, the front plates, the impellers and the peripheral side of the water inlet ring are inclined and cut to form a inclined surface. In view of the problems of small flow and low power existing in the prior art, the channel can guide the flow of water in a plurality of middle guide vanes to flow in a vortex shape through setting double inclined vanes, thus greatly improving the flow and the working efficiency.

The invention discloses a water hammer air valve and a water hammer gas discharging method during pipeline use. The water hammer air valve comprises a valve body, a bonnet and a protective cover, wherein the bonnet is provided with an opening, the protective cover is disposed on the opening, the valve body is provided with a valve opening for being communicated with a pipeline, a high-speed gas feeding and discharging device which is used for discharging gases stayed in the pipeline during water filling to the outside and shutting down the valve after pipeline water filling is completed is disposed in the inner cavity of the valve body, the output end of the high-speed gas feeding and discharging device is communicated with the outside through the opening of the bonnet, and the valve opening of the valve body is communicated with a bottom gas discharging throttling device for limiting the gas displacement of the pipeline to the inner cavity of the valve body; a trace gas discharging device for discharging mixed, residual and / or precipitated gases in the pipeline to the outside through the opening of the bonnet after the high-speed gas feeding and discharging device shuts down the valve is further disposed in the high-speed gas feeding and discharging device. By the water hammer air valve, water hammer reduction and pipeline safety protection are achieved, blowing blocking during high-speed gas discharging is avoided, and valve closing water hammer is eliminated.

The invention belongs to the technical field of garden spraying and in particular relates to an energy-saving watering sprinkler based on hydraulic ram. The energy-saving watering sprinkler comprises a high-level water storage pool, a power pipe, a return water tank, a hydraulic ram, a water outlet, a rest water tank, a sprinkler, a water storage pool water inlet pipe, a water storage pool water inlet pump, an underground water pumping pipe, a return water pumping pipe, a return water tank, wherein a hydraulic ram power pipe inlet is connected with the water storage pool; the power pipe remains a certain inclination; the water storage can collect rainwater on one hand, and can pump water from the underground and the return water tank via the water storage water inlet pipe on the other hand; water in the return water tank is recovered from a water outlet of the hydraulic ram; the water input into the hydraulic ram is rainwater, recovery water and underground water; and certain water-saving effect can be achieved. A pipeline position is re-designed in the hydraulic ram and a water outlet gap switch is utilized to reduce hydraulic kinetic energy loss of the hydraulic ram, so water conveying efficiency is increased; the water sprinkler is re-designed; and the vertical arrayed water sprinkling ports enable water to be evenly sprayed around.

The invention relates to a ship lock double-layer water conveying system with a longitudinally-through drainage type lock bottom. The ship lock double-layer water conveying system comprises a ship lock chamber, a first diversion port, a middle branch gallery, a second diversion port, water conveying main galleries located on two sides of the ship lock chamber, filling valves arranged on the upstream portions of the water conveying main galleries, and drain valves arranged on the downstream portions of the water conveying main galleries; the water conveying main galleries communicate with an inlet of the first diversion port through T-shaped pipes, and an outlet of the first diversion port communicates with the second diversion port through the middle branch gallery; the second diversion port communicates with the third diversion port located in the upper layer through a vertical shaft, the third diversion port communicates with a water drainage branch gallery, and the water drainage branch gallery communicates with water drainage holes, and energy dissipation cover plates are arranged on the water drainage holes; and the elevations of the first diversion port, the middle branch gallery and the second diversion port are consistent with those of the drain valves, and the third diversion port, the water drainage branch gallery, the water drainage holes and the energy dissipation cover plates are located on the elevation surface of a lock chamber bottom plate. According to the ship lock double-layer water conveying system, the pressure characteristics of the diversion ports canbe improved to avoid cavitation and cavitation erosion, moreover, outflow can be dispersed to the maximum extent, and the water conveying safety and the water conveying efficiency of the ship lock are improved.

The invention provides a barreled water distribution method and device based on big data. The amount of barreled water distributed for a user can be accurately determined by combining a water delivery plan, so that improvement of the working quality and the working efficiency of water delivery of a water delivery company is promoted. A method for determining barreled water delivery amount comprises the steps that a server obtains data of initial standby barrel number of the user and number data of barrels, used by the user, in initial standby barrels; the server determines the current standby barrel number of the user according to the difference between the initial standby barrel number of the user and the number of the barrels, used by the user, in the initial standby barrels; if the server judges the current standby barrel number of the user is smaller than a set minimum standby barrel number, and the number of the barrels to be delivered is determined according to the current standby barrel number of the user and the set maximum standby barrel number; the data of the number of the barrels to be delivered is output.

The invention relates to the technical field of sewage collection and discharge, and discloses a self-driven quasi-single-phase flow vacuum drainage system. The self-driven quasi-single-phase flow vacuum drainage system comprises a grading mechanism, wherein the grading mechanism further comprises a water storage tank, a connecting pipe I is fixedly connected to the interior of the water storage tank, a threaded pipe is connected to the outer side of the connecting pipe I in a sleeving mode, and a flow driving plate is rotationally connected to the bottom end of the threaded pipe. According to the self-driven quasi-single-phase flow vacuum drainage system, sewage enters a water collecting tank through a sewage pipe, and the sewage is communicated with a vacuum pipeline through a self-driven system so that the vacuum system cannot be damaged. According to the system, dirt attached to the inner wall of the flow driving plate can be self-cleaned, so that the inner wall is prevented from being blocked, and the sewage discharge efficiency is improved; and meanwhile, air is prevented from being sucked into the system as much as possible, so that the water conveying efficiency of the quasi-single-phase flow system is improved, and the energy consumption and the later operation and maintenance cost of the drainage system are greatly reduced.

The invention belongs to the related technical field of high-saline-alkali soil and ash modification, and discloses a concealed pipe salt and alkali removal device which comprises a plurality of concealed pipes, outlets of the concealed pipes are connected with a water collecting device, each concealed pipe comprises a water conveying pipe and an exhaust pipe arranged in the water conveying pipe, a plurality of first small holes are formed in the surface of each exhaust pipe, and outlets of the exhaust pipes are connected with exhaust pumps; and a plurality of second small holes are formed in the surface of each water conveying pipe, and first permeable geotextile is arranged on the outer surface of each water conveying pipe. Evaporation is increased by accelerating flowing in the concealed pipes, so that water is timely discharged from the concealed pipes, flowing of the water to underground water is effectively reduced, enrichment of salt and alkali substances is reduced, and simplicity and high efficiency are achieved.

The invention relates to a filler for a composite pipe fitting, in particular to a formula of filling concrete for the composite pipe fitting. The coating is characterized by comprising adaptive metal powder, lead powder, calcium carbonate powder, cement, an organic binder, an antirust agent, a thickening agent, an anti-slip agent and water. The matching ratio of the adaptive metal powder, the lead powder, the calcium carbonate powder, the cement, the organic binding agent, the antirust agent, the thickening agent, the anti-slip agent and the water is as follows in parts by mass: 45 to 62 parts of the adaptive metal powder, 10 to 28 parts of the lead powder, 5 to 13 parts of the calcium carbonate powder, 20 to 36 parts of the cement, 5 to 13 parts of the organic binding agent, 3 to 6.5 parts of the antirust agent, 0.03 to 0.07 part of the thickening agent, 0.05 to 0.15 part of the anti-slip agent and 20 to 33 parts of the water; the sealing performance and the service life of the composite pipe fitting can be stably kept for a long time, smoothness of a water conveying pipeline is guaranteed, potential safety hazards are reduced, the pipeline maintenance cost is reduced, the water conveying efficiency is improved, and the beneficial effects of reducing environmental pollution and saving energy are achieved.

The invention discloses an ecological water conservancy ditch and a construction method thereof. The ecological water conservancy ditch comprises a bottom plate, a closed conduit frame, first open channel plates and second open channel plates, wherein the closed conduit frame is arranged on the bottom surface of the bottom plate; the first open channel plates and the second open channel plates are symmetrically arranged on the top surface of the bottom plate; a first open channel is formed between two opposite first open channel plates; a second open channel is formed between the first open channel plate and the second open channel plate on the same side; a supporting mechanism is arranged between the first open channel plate and the second open channel plate; and the supporting mechanism is positioned in the second open channel. The method comprises the following steps: measuring and lofting, constructing the closed conduit frame, laying the bottom plate, constructing the first open channel plates and the second open channel plates, and performing trial operation on the ditch. According to the ecological water conservancy ditch disclosed by the invention, exhaustion in the ditch due to drought is avoided, icing due to temperature drop is avoided, flowing water in the closed conduit all the year round is maintained, and the multifunctional requirements of the ecological water conservancy ditch are met.

A double-layer water delivery system for a ship lock with longitudinally penetrating water outlet at the bottom of the lock, comprising a ship lock chamber, a first diversion port, a middle branch corridor, a second diversion port, main water delivery corridors located on both sides of the ship lock chamber, respectively The water filling valve and the water discharge valve are located upstream and downstream of the main water delivery corridor. The main water delivery corridor is connected to the inlet of the first diversion port through a T-shaped pipe, and the outlet of the first diversion port is connected to the first diversion port through the middle branch corridor. The two diversion ports are connected, the second diversion port is connected to the third diversion port on the upper floor through the vertical shaft, the third diversion port is connected to the water outlet branch corridor, the water outlet branch corridor is connected to the water outlet hole, and the upper part of the water outlet hole is provided with an energy dissipation cover , the elevation of the first diversion port, the middle branch corridor and the second diversion port are consistent with the elevation of the discharge valve, and the third diversion port, water outlet corridor, water outlet hole and energy dissipation cover are located at the bottom of the sluice chamber. The invention can improve the pressure characteristics of the diversion port to avoid cavitation and cavitation erosion, can also disperse the outflow to the greatest extent, and improve the safety and efficiency of water delivery of the ship lock.

The invention belongs to the technical field of water pumping equipment, and particularly discloses a low-water-suction water pump which comprises a base, a pump body and a motor. The pump body is fixedly connected to the upper surface of the base. The pump body is of a cylindrical design. A pressurizing cavity and a self-sucking cavity are formed in the pump body. A supporting plate is fixedly connected with the side, away from the base, of the pump body. A supporting column is fixedly connected to the base. The supporting column is fixedly connected with the supporting plate. The motor is fixedly connected to the side, away from the pump body, of the supporting plate through a flange. A rotary shaft is rotationally connected into the pressurizing cavity. By arranging a first rotating wheel, a second rotating wheel and a piston column, by means of the sealing effect between the first rotating wheel and the second rotating wheel and the self-sucking cavity, air in a water pumping pipeis continuously sucked upwards, then water flow rises up under the action of pressure and finally enters the self-sucking cavity through a water inlet groove, and meanwhile a piston rod does reciprocating motions to enhance the sucking effect of the first rotating wheel and the second rotating wheel in the self-sucking cavity.