683results about How to "Reduce water pressure" patented technology

A show head water pick apparatus includes a first pipe segment for attachment to a shower pipe protruding outwardly from shower stall wall and having a first pipe segment outward end; a switch valve having a switch valve intake end connected to the first pipe segment outward end, and having a shower head output branch to which a shower head is connected and a water pick output branch, and having a valve operation handle for delivering water flow alternately to the shower head and to the water pulsing and pick assembly; a water pulsing unit connected to the water pick output branch; a water pick tube having a tube first end and a tube second end, the tube first end being connected to the water pulsing unit; and a water pick secured to the tube second end.

The invention relates to the field of tunnel engineering construction, in particular to a control method of surrounding rocks in water-rich very-broken surrounding rock tunnel collapse sections. According to the control method, problems in the existing methods that managing circle is long, reinforcing range and effect are bad, secondary geological disasters are triggered easily because of deformation and cracking of exceeding clearance limit of preliminary bracing and the like are solved. The method includes the following steps: searching and analyzing factors leading to collapse and disaster degree, stabilizing exposed face of an accumulation body and dewatering and decompressing deep parts, strengthening supporting intensity in the collapse sections and influencing areas, outburst prevention filling and strengthening the collapse accumulation body, grouting reinforcing asymmetrical peripheral curtains, confirming an excavating method in grouting reinforcing collapse sections and primary supporting patterns, replenishing grouting in parts, excavating inverted arches, and constructing second liners. The control method of surrounding rocks in water-rich very-broken surrounding rock tunnel collapse sections has the advantages that collapse disposing construction period of water-rich very-broken surrounding rock tunnels is shortened, reinforcing range and intensity of the surrounding rocks are guaranteed, grouting reinforcement is fully conducted on the surrounding rocks in direct collapse areas, deformation in the preliminary bracing is relieved, occurrence of the exceeding clearance limit and the secondary geological disasters is avoided, disposing quality of collapse accidents is improved effectively, and good social benefit and economical benefit are created.

The invention relates to the field of tunnel construction, in particular to a method for constructing a metamorphic rock confined water tunnel, which solves the problems of the current method that geological disaster is easily initiated, the digging outline is difficult to control, timbering at initial stage is easy to transform and craze and the collapse is easy to occur. The method comprises the steps of: preliminarily forecasting surrounding rock level and underground water developing condition, accurately forecasting the geologic condition and the underground water developing condition by an advanced prospect hole, draining and decreasing water pressure by an advanced borehole, fixing the surrounding rock and plugging water by grouting via an advanced ductile, choosing a digging manner of tunnel trunk, determining the timbering form at initial stage, constructing a radial ductile, digging an inverted arch, pouring inverted arch concrete, and constructing a secondary lining. The construction method of the invention can efficiently control the digging outline, decrease the collapse frequency and the scale, efficiently control the transformation and cracking of the timbering at initial stage and can almost avoid the tunnel collapse by secondarily exchanging arch. The cost is decreased and the construction quality and the construction safety are efficiently promoted so as to bring excellent social benefit.

The invention relates to the field of tunnel construction, in particular to a rapid construction method of a high-pressure water-rich fault zone of a tunnel, which solves a plurality of problems in the construction method of high-pressure water-rich fault zone tunnels under the guide of the traditional knowledge. A draining branch tunnel is additionally arranged between a main tunnel and a parallel heading, the water flow pressure of the hanging wall of a fault interface is reduced progressively, and a large amount of water is discharged from the main tunnel by adopting a guiding and non-clogging mode; when the water pressure of the main tunnel is reduced to 0.3-0.5MPa, an informationized tracking and accurate grouting method is used for grouting and reinforcing the main tunnel; and rapidly excavating and sealing technology is used for excavating the main tunnel and the parallel heading. The invention adopts the technology combining the water distribution and pressure reduction mode, the informationized tracking and accurate grouting method and the rapidly excavating and sealing technology for high-pressure water-rich shattered fault zones for the first time, breaks through the traditional concept that the water distribution and pressure reduction mode is opposite to the grouting and reinforcing construction method, solves the world-class problem of construction of the high-pressure water-rich fault zone of the tunnel, improves the construction progress and the construction efficiency, and ensures safe and rapid perforation of the tunnel.

The pulsating spinning showerhead includes a water inlet, water channels for distributing water from the water inlet, and spray nozzles for receiving water from the water channels and projecting a water stream out of the showerhead. At least one valve controls water flow to the spray nozzles. One or more micromotors provides alternating activation of valve so that the spray nozzles receive water in cycles to produce a pulsating output of water. The micromotor and valve are powered by a low voltage power source. In the preferred embodiment, the power source is one or more batteries.

The invention discloses a construction method of a high-tension water-rich extra-large-section weak breccia tunnel. The method includes the steps of exploring distribution of fault weak breccia in front of a tunnel face by an advanced geological forecast method; distributing L-shaped gradient drain holes in two inner sides of the tunnel, providing sector drain holes and grouting holes, and allowing upper grouting and lower drainage; providing a combined cylinder grout-stopping wall, and performing a full-face advanced chemical grouting consolidation; constructing an advanced long tube shed with a circumferential closed advanced tube shed guide wall having a foundation, distributing tapered quincunx examining drain holes to detect grouting effect, and finally excavating the tunnel. Through the use of the techniques such as three-layer stereoscopic grouting and drainage, and cement-water glass and epoxy resin sequential grouting, the problem that a high-tension water-rich surrounding rock area with loose weak breccia has ineffective grouting consolidation and non-obvious water plugging effect is solved.

The invention discloses a concrete wall and bottom plate water seepage crack repair method. The method comprises the following steps that wall and bottom plate cracks are found out and marked; the crack of which the width is larger than 0.3 mm is subjected to digging into a V-shaped groove; dust, dirt and loose parts of the surface of concrete in the V-shaped groove area are removed and washed with water; layered dense blocking and maintenance are conducted on the V-shaped groove through a waterproof leaking stoppage part, and meanwhile, a grouting nozzle is implanted; grouting holes are obliquely drilled in the two sides of the crack, and a grouting nozzle is installed; and after final set of the waterproof leaking stoppage part, the grouting holes are circularly subjected to pressure grouting; and after grout is completed solidified, the grouting nozzles are disassembled. According to the method, by obliquely drilling the grouting holes in the two sides of the crack and installing the grouting nozzle, a plurality of channels communicating with the interior of the crack are formed, the water pressure of the interior of the crack can be reduced, grout can be injected into the crackconveniently in the later period, through permeation of the grout, the water seepage crack is sealed after the grout is solidified, and accordingly, the water seepage crack leaking stoppage effect isachieved so that underground construction water seepage accidents can be avoided.

A labor-saving push-button water valve includes a button, a valve core, a valve core spring, and a valve seat. The middle portion of the valve seat is formed with a core chamber. An outer periphery of a front end of the valve core is formed with an annular groove. When the button drives the valve core to move to the position where a water inlet hole is not communicated with a water outlet hole, an annular hydraulic chamber is formed between the valve core and the peripheral wall of the core chamber. The water valve is able to switch the opening and closing of the waterway smoothly by reducing the water pressure applied to the valve core, and reduces the wear of the valve core, and improves the service life and the airtightness of the water saving structure.

A system for monitoring non-volatile residue concentrations in ultra pure water includes a nebulizer for generating an aerosol composed of multiple water droplets, a heating element changing the aerosol to a suspension of residue particles, and a condensation particle counter to supersaturate the dried aerosol to cause droplet growth through condensation of a liquid onto the particles. The nebulizer incorporates a flow dividing structure that divides exiting waste water into a series of droplets. The droplets are counted to directly indicate a waste water flow rate and indirectly indicate an input flow rate of water supplied to the nebulizer. The condensation particle counter employs water as the condensing medium, avoiding the need for undesirable chemical formulations and enabling use of the ultra pure water itself as the condensing medium.

The invention discloses an anti-blocking sewer pipeline which comprises a pipeline. A mounting disc is fixed to the inner wall of the pipeline, a first mounting opening and a second mounting opening are formed in the mounting disc, a fixing pipe is mounted in the first mounting opening, a filter screen is mounted in the second mounting opening, a slide bar is slidably arranged in the fixing pipe,a flange is arranged on the outer wall of the end, which is positioned in the fixing pipe, of the slide bar, a return spring is arranged between the flange and the inner bottom wall of the fixing pipein a fixedly connected manner, the lower end of the slide bar extends out of the fixing pipe, and a mounting plate is fixed onto the inner wall of the pipeline. The anti-blocking sewer pipeline has the advantages that water pressures can be increased after the inside of the pipeline is blocked, the slide bar can be squeezed to downwardly move, a first movable rod and a second movable rod furthercan be driven to move, blocking materials on the filter screen further can be scraped by a scraping plate and can be pushed into a collecting groove to be collected, accordingly, the smoothness of thefilter screen and the pipeline can be recovered, the anti-blocking sewer pipeline is convenient to clean, and normal family life can be guaranteed.

The invention discloses a tunnel maintainable type pressure reducing and water draining method and device for a water rich stratum. The method comprises the steps that (A) a water draining trough is annularly formed along a tunnel lining deformation seam; (B) water diversion holes are formed in the water draining trough in the surrounding rock direction; (C) a semi-circular pipe is fixed in the water draining trough through fasteners, and a water draining channel is formed; (D) a water collecting trough is reserved in the bottom of the semi-circular pipe, and water is led into an edge gutter through a corrugate pipe. The water draining trough is formed in a cable duct cover plate, the semi-circular pipe is arranged in the water draining trough, the water diversion holes are formed in one side of the water draining trough in an even spaced mode, a waterproof plate with non-woven fabric warps the semi-circular pipe, and the semi-circular pipe is fixed to the wall of the water draining trough on the two sides of the waterproof plate through the fasteners. The water collecting trough is connected with the semi-circular pipe through the corrugate pipe, and the edge gutter is connected with the water collecting trough. The method is easy to implement, operation is easy and convenient, blocking is not prone to occurring, and the water draining effect is good. Water pressure behind a tunnel lining and a second lining can be effectively reduced. The problem of water leakage caused by blocking of a tunnel water draining system is solved.

The invention discloses a treatment method of Bayer method red mud, comprising the following steps: (a) the red mud is sorted by a beneficiation method and divided into three parts, namely, rough sand, fine sand and soil mortar; (b) milling grinding and settling separation are carried out to the rough sand in the step (a) to obtain rough sand one and tailing ore slurry one; (c) after the rough sand one in the step (b) and the fine sand in the step (a) are mixed, magnetic separation is carried out to obtain iron powder and quartz powder; (d) the iron powder obtained in the step (c) is refined and sorted by a magnetic separator to obtain fine iron powder F and fine iron powder P; and (e) the soil mortar in step (a) is pulse magnetic separated to obtain tailing ore slurry and fine iron powder PI. The method can reduce 35-40 percent of red mud discharge, the iron element effective utilization rate can reach more than 70 percent, and the monomer quartz extraction yield can reach 80 percent. The method optimizes the production flow of alumina by using a combination method, reduces the red mud discharge, protects the environment, reduces the production cost of alumina and improves the alumina production capacity.

The invention relates to a water-rich stratum tunnel bottom drainage structure and a construction method thereof. A ballast bed base plate is arranged above an inverted arch in a spaced mode; bearing piles are arranged between the ballast bed base plate and the inverted arch; water passing culverts of the tunnel bottom are formed between the ballast bed base plate and the inverted arch; drainage side ditches communicate with the water passing culverts through side ditch drainage pipes; water collecting wells are arranged on the bottom faces of the water passing culverts; the lower ends of the water collecting wells penetrate through the inverted arch to extend into filtering water collecting devices under the inverted arch; water releasing holes are formed in the bottoms and the side walls of the water collecting wells, and filtering layers are arranged on the outer sides of the water releasing holes; and one-way drainage devices are arranged in the water collecting wells. An inverted arch filling part in the prior art is replaced with the ballast bed base plate and the bearing piles; on the basis of guaranteeing tunnel structure safety, the water passing cross section area of a tunnel drainage system is increased, and the tunnel drainage capacity is improved; and meanwhile, underground water under the water-rich stratum tunnel inverted arch is drained, tunnel bottom water pressure is reduced, and preventing of damage such as upheaval of the tunnel inverted arch and frost boiling and mud pumping of a ballast bed is facilitated.

The invention discloses a tunnel diversion composite type waterproof and drainage system which comprises a surrounding rock waterproof and drainage system and a tunnel internal drainage system, wherein the surrounding rock waterproof and drainage system comprises a waterproof and drainage layer and a surrounding rock water drainage and collection pipe; the waterproof and drainage layer consists of multiple waterproof and drainage plates arranged in a butting manner; the surrounding rock water drainage and collection pipe consists of a concrete prefabricated pipe and a cover plate; the tunnel internal drainage system comprises a left water collecting tank, a right water collecting tank, a tunnel internal water drainage and collection pipe, a left drainage pipe and a right drainage pipe; the tunnel internal water drainage and collection pipe is arranged on a water collecting pipe base. The invention also discloses a construction method and a use method for the tunnel diversion composite type waterproof and drainage system. According to the tunnel diversion composite type waterproof and drainage system as well as the construction method and the use method thereof disclosed by the invention, the convenience for construction is realized; the diversion of surrounding rock waterproof and drainage and tunnel internal waterproof and drainage is realized, two functions of resisting water and draining water are integrated, the overall waterproof and drainage effects of the integral tunnel are improved, and the difficult problems of tunnel crack, leakage, frost heaving, water logging or icing and the like of a tunnel can be thoroughly solved.

The invention discloses a tunnel drainage structure applicable to water-rich strata under unsymmetrical pressure and a construction method thereof. The tunnel drainage structure comprises a tunnel trunk located in a stratum, a plurality of water-collecting wells are dug in the stratum of the water-rich side of the tunnel trunk, and a drainage passage which is used for draining the water in the water-collecting well into the tunnel trunk is arranged between each water-collecting well and the tunnel trunk. The construction method of the tunnel drainage structure includes digging the water-collecting wells for well-point dewatering, digging the tunnel trunk, digging the drainage passages and other steps. The invention can decrease the water pressure around the tunnel, prevent water leakage during the operation of the tunnel and prevent landslides, tunnel face collapse and other accidents from taking place during construction, and has the advantages of high construction safety and the like.

The invention relates to a solar driving device of a coil type automatic walking sprinkler. The device comprises a coil type sprinkler, wherein the coil type sprinkler is provided with a solar panel, a light illumination sensor, a rotary mechanism, a driving motor, a speed reducer, a speed sensor and the like. The device has the advantages that the device is driven by a motor which can be powered by solar energy, so the defect of high energy consumption of common water turbine driving of the general sprinkler is overcome; a storage battery is powered by the solar panel, so the complicated condition of a power supply line overhead a farmland is avoided; the solar panel is provided with an intelligent sun tracing system, the solar panel is enabled to automatically rotate and adjust the angles, and the higher photovoltaic power generation efficiency of the solar panel is realized; a hose pipe is provided with the speed sensor, a closed loop control system is controlled through speed to enable the hose pipe of a coiling vehicle to move at constant speed during pipe coiling, the speed difference caused by the winding layering of the hose pipe is avoided, and the uniform distribution of water spraying amount is ensured; the defects of high energy consumption, heavy weight, nonuniform distribution of water spraying amount and the like of the existing coil type sprinkler are overcome, and the solar driving device is a novel green, energy-saving and environment-friendly type intelligent driving device.

The invention provides a grouting treatment method for a broken water-rich section of a diversion tunnel in a karst area. The method includes the following steps: S1) conducting geological explorationon the broken water-rich section of surrounding rock with water inrush to determine a major runoff path of fissure water and / or groundwater; S2) drilling a drainage hole from a tunnel wall of the broken water-rich section of the surrounding rock to the runoff direction of the fissure water and / or the groundwater in the surrounding rock for drainage of the fissure water and / or the groundwater; S3)drilling grouting holes at preset distance along the radial and circumferential directions of the tunnel wall of the broken water-rick section of the surrounding rock and inserting a grouting pipe into each grouting hole; S4) injecting grouting liquid into the surrounding rock through the drainage hole and the grouting pipes to form a water stop curtain circumferentially in the surrounding rock of the tunnel wall. According to the method, a better grouting treatment effect is achieved, the engineering safety is ensured, and the groundwater resource pollution is reduced.

The invention relates to a gravity pressure water delivery system with an automatic-adjusting weir well, in particular to a hydraulic adjustment and control system used for water delivery engineering.The system comprises: an adjusting weir well which is arranged between a water inlet and a water outlet and connected through a pipeline. The weir well comprises: a weir well water inlet connected with an upstream pipe at the bottom part of the inlet breast wall of the adjusting weir well, wherein two sides of the inlet breast wall are respectively connected with the side wall of the weir well; the outlet breast wall of the adjusting weir well is connected with the side wall of the weir well and the bottom part of the outlet breast wall is a weir well water outlet connected with a downstreamwater delivery pipe; an overflow weir is arranged at the bottom part of a shaft between the inlet and the outlet breast wall and lies across between two side walls; for longer gravity pressure water delivery engineering, different water delivery flow rates need different water heads; the adjusting weir well can automatically adjust the water heads; when the water delivery flow rate is less than design flow rate, surplus water heads are consumed in sections and the internal water pressure of a pressure pipe culvert is reduced; and at the minimum operating flow rate, the minimum pressure requirement indispensible to the pipe culvert is kept. The water delivery system not only has simple hydraulic control, but also ensures the safe and reliable water delivery of the engineering.

The invention discloses a drain-type pipe piece for tunnel lining. The drain-type pipe piece comprises a reinforced concrete pipe piece (1), a slurry injection hole (or a hoist hole) (1a) in the pipe piece (1), a load bearing steel bar (1b), and a concrete protective layer (1c) on the outer side; a water stop rubber block (2) capable of being expanded when being in contact with water is preburied in the concrete protective layer (1c) right opposite to one or two slurry injection holes (1a) of the pipe piece (1); a self-advancing type hollow anchor rod (3) is inserted in the slurry injection holes (or the hoist hole) (1a) of the pipe piece (1), then penetrates the water stop rubber block (2), and shoots out of the concrete protective layer (1c); and drain holes (3a) are formed in the rod wall of the outer end of the self-advancing type hollow anchor rod (3), and a filter column (4) used for filtering sand is plugged in the inner cavity of the self-advancing type hollow anchor rod (3). Lining built with the pipe pieces has a reliable drain function, and can reduce water pressure around the structure to ensure tunnel safety; and construction is convenient, small damage is caused to the pipe piece lining structure, and construction cost of the pipe piece lining is low.

The invention relates to a solar-energy translation type sprinkling machine comprising a main rack body. The main rack body is formed by a master beam and a rack arranged under the master beam, wherein a walking mechanism is arranged under the rack; water pipes are fixed on the master beam; two sides of the master beam are respectively provided with a suspension arm mechanism horizontally extending outward; each suspension arm mechanism is fixed via a traction rope; a water outlet end of each water pipe extends along the suspension arm mechanisms on two sides via branching and connected with a plurality of water spraying devices on the lower ends of the suspension arm mechanisms respectively; one side of each suspension arm mechanism is fixedly connected with a balance universal wheel via a first telescopic support and the other side is connected with a second telescopic support; and the second telescopic support is connected with a bearing groove. The sprinkling machine is advantaged by energy conservation, high efficiency, convenient use, great balance property and crop rolling resistance.

The invention discloses an irrigation system controlled wirelessly. The irrigation system controlled wirelessly comprises an irrigator (10), a water pump (20), a wireless controller (30) and a water storage pool (40). The irrigator (10) is provided with a wireless signal transmitter (12). The water pump (20) is respectively communicated with the irrigator (10) and the water storage pool (40) through a main irrigation pipeline (50). When the irrigator (10) is started, the wireless signal transmitter (12) transmits wireless signals for controlling starting / stopping of the water pump (20) to the wireless controller (30) at the same time. According to the technical scheme, the irrigator is provided with the wireless signal transmitter, the wireless controller receives the wireless signals for controlling starting / stopping of the water pump at the same time, and therefore when the irrigator is started and operation control over the water pump is achieved at the same time. The way that in a traditional irrigation system, after a branch valve is opened, people need to walk to the water pump and carry out operation is avoided. Meanwhile, due to the characteristic of transmitting and receiving of the wireless signals, a complicated circuit does not need to be arranged.

The invention discloses a downhole stereo rapid water drainage method through the combination of horizontal drilling holes and vertical drilling holes. A plurality of main horizontal drilling holes are transversely arranged in an aquifer, a plurality of branch horizontal drilling holes extend out from the tail ends of the main horizontal drilling holes, the main horizontal drilling holes and the branch horizontal drilling holes avoid a poor-water area and pass through a rich-water area, a plurality of vertical drilling holes are arranged upwardly from the top plate of a tunnel and vertically reach to the place where the horizontal drilling holes cannot reach and the rich-water area with large expected water inflow, a stereo drainage network is formed through the combination of the plurality of horizontal drilling holes and vertical drilling holes, and water in a stope caving zone, a water guide crack zone, and a bottom board damage influence zone in the stoping influence range of a top bottom board can be clearly drained to a large extent. According to the method, the horizontal drilling holes and the vertical drilling holes are reasonable and scientific in design, the water pressure is effectively reduced, the drainage effect is improved, the construction period is greatly shortened, and the exploitation safety of the ore bed threatened by flood damage.

The present invention discloses a high-energy density permanent magnet motor water cooling system. The high-energy density permanent magnet motor water cooling system comprises a stator, stator windings, cooling water pipes and disc pipelines. The cooling water pipes specifically comprise cooling water pipes at a stator yoke, cooling water pipes in centers of stator slots, and cooling water pipes at stator teeth. The cooling water pipes are axially mounted in the slots, teeth and yoke of the motor stator. The disc pipelines are at ends of the motor. Two ends of the cooling water pipes are respectively connected with the two disc pipelines at the ends of the stator. The number of the disc pipelines is two. The water cooling system directly cools main heating parts of the motor, that is, the windings and an iron core, so that the heat dissipation efficiency is greatly improved. The cooling water pipes are simple and have fewer turnings, so that the flow resistance of cooling water is reduced sharply, and the water pressure of a water pump is lowered. The temperature of the motor is distributed more uniformly, the heat dissipation capacity is greatly improved, and further, the torque density of the motor is improved.

The invention discloses an interception and drainage pressure-reduction anti-floating system which comprises a waterproof curtain arranged around an underground structure. A plurality of water collecting pits are formed below a bottom plate of the underground structure. Immersible pumps and water level induction switches are arranged in the water collecting pits. Well holes are formed in the bottoms of the water collecting pits. Pressure-reduction well pipes are arranged in the well holes. Anti-filtration layers are arranged around the pressure-reduction well pipes. The tops of the pressure-reduction well pipes are higher than openings of the well holes. The anti-filtration layers are located in the water collecting pits. The pressure-reduction well pipes are mainly formed by axially and vertically stacking a plurality of non-fine concrete well rings. The non-fine concrete well rings comprise upper annular ring beams, lower annular ring beams, stand columns and non-fine concrete wedge-shaped blocks. By means of cooperative work of the system, buoyant force on the bottom plate can be effectively reduced, the drainage amount can be controlled, the surrounding is protected against surface subsidence caused by the too large drainage amount, the number of uplift piles and the number of uplift anchor rods are greatly decreased, non-fine concrete blocks can be conveniently dismounted and replaced, and it is guaranteed that a pressure-reduction well has enough durability.

The invention discloses a household water purifier which comprises a booster pump, a reverse osmosis filter unit, a one-way valve and a post-filtering unit which are connected in sequence, wherein the reverse osmosis filter unit is provided with a concentrated water gap and a purified water gap, the booster pump is connected with a raw waster pipeline, the one-way valve is connected with the purified water gap of the reverse osmosis filter unit, and a connecting pipeline between the one-way valve and the post-filtering unit is connected with a water storage bucket and a high voltage switch respectively. The household water purifier further comprises a control valve; and a water inlet of the control valve is connected with the concentrated water gap of the reverse osmosis filter unit, a water outlet of the control valve is connected with a water gap of a pressure cavity of the water storage bucket, and a drain opening of the control valve is connected between the raw water pipeline anda connecting pipeline of the booster pump. By adopting the structure, the household water purifier has a simple integral structure and is easy for realization, the self-washing of the reverse osmosisfilter unit can be automatically completed during the outputting process of purified water, so that a washing solenoid valve is saved, and the purpose of recycling washing water can be achieved.

The invention discloses a water pipe flow stabilizing broadband muffler which comprises a water delivery pipe and a muffler casing. An expanded perforated pipe is fixedly installed on the inner side of one end of a muffler casing body fixedly connected with the water delivery pipe. An end plate is fixedly arranged at the other end of the muffler casing. A shunting perforated pipe is further fixedly connected onto the end plate, and a throttle ring is fixedly arranged at the port position of the inner end of the shunting perforated pipe. The inner diameter of the expanded perforated pipe is larger than the outer diameter of the shunting perforated pipe, the inner end of the expanded perforated pipe and the inner end of the shunting perforated pipe are in fixedly sleeved connection in a gapped mode, and the flowing cross area of the water delivery pipe is smaller than the sum of the hole flowing cross area of the end plate and the flowing cross area of the shunting perforated pipe. The water pipe flow stabilizing broadband muffler can achieve broadband muffling of the water pipe, effectively stabilize a flow field at the outlet end of the water pipe, reduce the water spraying-flowing speed and pressure, accordingly reduce water pipe port noise effectively and achieve the effects of flow stabilizing and broadband muffling.

The invention relates to a water-saving irrigation device with a water collection function for agricultural production. The water-saving irrigation device comprises a base, a water pump, a water pumping pipe, a water conveying pipe, a platform, an irrigation mechanism, a water collecting mechanism, a processor and a plurality of supporting columns; the water collecting mechanism comprises a watertank, a draining pipe and four water collecting assemblies, a fixing plate is arranged in the water tank, and a water collecting hole and a sealing set are arranged at the center of the fixing plate;the irrigation mechanism comprises a connecting pipe, a rotating assembly and a plurality of irrigation assemblies, and each irrigation assembly comprises a sprayer and a spray pipe. According to thewater-saving irrigation device with a water collection function for agricultural production, rainwater can be automatically collected on rainy days through the water collecting mechanism to be used for irrigation at ordinary times, and thus the water supply pressure of a water supply system is reduced; besides, in the irrigation mechanism, the spray pipes and the sprayers can be driven to rotate through the rotating assembly, the rotation speed of the sprayers can be adjusted, and therefore the position of sprayed water falling on the ground can be changed and the irrigation range can be expanded; uniform irrigation is realized by rotation, and the practicability of the device is improved.

The invention discloses an ultrahigh-solid-content nano-grade high-molecular alloy paint comprising the following components: polyurethane polyurea resin, bisphenol F epoxy resin, a silane coupling agent, tetraethyl orthosilicate, ethanol, vinyl double cap, nano-grade zinc oxide, nano-grade titanium dioxide, nano-grade aluminum trioxide, an AO-80 antioxidant, a light stabilizer, a UV absorber, a leveling agent, and a defoaming agent. The paint provided by the invention is long-lasting, green and environment-friendly, and has the advantages of ultrahigh hardness, fouling resistance, and easy cleaning.

A shower head (10) including: a shower head body (13) having a water inlet (11) formed at a proximal end of the body (13), and a sprinkler portion (18) disposed at a distal end of the body (13) and having a plurality of sprinkler holes (16),wherein the body (13) includes: a tubular handle portion (27) having a water passage (12) inside, the water passage (12) having the water inlet (11) at a proximal end thereof; and a discharge head portion (28) integrally joined to a distal end of the handle portion (27), andwherein a space (20) enclosed by the discharge head portion (28) and the sprinkler portion (18) is provided with a cavitating mechanism (57) for partially causing a cavitation phenomenon due to a change in cross section of water flow therein.

The invention discloses a construction method for a basement floor post-cast strip waterproofing structure and belongs to the technical field of waterproofing of buildings. The construction method comprises the following steps: laying a main drain pipe and a branch drain pipe in a water filtering tank to a floor sump, fully laying graded broken stone in the water filtering tank to form a broken stone water filtering layer, arranging mortar stop blocks on two sides at the lower part of a post-cast strip, and mounting floor reinforcing bars; mounting mortar stop blocks on two sides at the upper part of the post-cast strip after mounting a post-cast strip side form; and pouring post-cast strip concrete after pouring floor concrete on two sides of the post-cast strip, and curing concrete under a strip-film heat and moisture preservation condition for not less than 14 days. The construction method provided by the invention can reduce water pressure of a basement floor, realizes the waterproofing function of the basement floor post-cast strip and guarantees the pouring quality of concrete.