276results about How to "Stable water pressure" patented technology

The invention discloses a true triaxial loading and unloading test device for large-size bedded pressure-bearing rock and a testing method. The device comprises a confining pressure loading module, a sample storage and water outlet module, a confined water loading module, a load loading module and a signal collecting and processing system, wherein the confining pressure loading module comprises two horizontal loading and unloading systems which are independent and perpendicular to each other and is used for performing horizontal load loading and unloading on the wrapped sample storage and water outlet module; the confined water loading module is located at the bottom of the sample storage and water outlet module and is used for performing confined water loading and unloading on the bottom of the bedded rock; the load loading module is located at the top of the sample storage and water outlet module and is used for performing vertical load loading and unloading on the top of the bedded rock; the signal collecting and processing system is used for collecting and analyzing signals in a test process. The test device realizes the true triaxial test of the bedded rock through four independent loading and unloading systems, truly simulates three-way anisobaric stress state of the coal-series bedded pressure-bearing rock and is more true and more reliable than a conventional triaxial test.

The invention discloses a reaction device for simulating migration and transformation of a soil organic pollutant, relates to a reaction device, and solves the problem that existing leaching experiment equipment for simulating the migration and transformation of the soil organic pollutant is large in experimental error, low in equipment use ratio and poor in adaptability The reaction device comprises a first water box, a second water box, a water pump, a water inlet pipe, a steady flow pipe, a support, a supporting frame, a base, a fixed plate, a first regulating valve, a second regulating valve, multiple flowmeters, multiple sieve hole plates, multiple earth pillars and multiple fifth regulating valves, wherein the first water box, the support and the supporting frame are all arranged on the base; the fixed plate is connected with the supporting frame, and the second water box is supported through the supporting frame; the supporting frame is provided with the multiple earth pillars which are vertically arranged, each flowmeter is arranged right above each earth pillar, the multiple flowmeters are fixedly arranged on the fixed plate, and the sieve hole plates are fixedly arranged on the support. The reaction device disclosed by the invention is used for simulating the migration and transformation of the soil organic pollutant.

The invention provides a method for producing green silicon carbide FEPA F P, comprising the following steps in turn: sifting raw materials, grinding, classifying by air flow, cleaning by water, classifying by water conservancy and coating surface, filtering by pressure, drying, calcining, sieving, packaging and warehousing. The invention uses a Raymond grinder for grinding and an air flow classification device for multiple classification, and classifies into products in different levels by water conservatory classification; in water conservatory classification, cladding materials are used asdispersant; in classification, water pressure is stable, multi-level precision is improved by siphon overflow classification, impurities in the crack of the micro powder grains are fully evaporated by calcination and tempering in the later period of production, and the cracks can be healed by high-temperature calcination. The production method in the invention greatly enhances product purity, increases crushing resistance of the grains in grinding and polishing, the grain fineness distribution is even with no large grain and with excellent shape and good affinity to grinding liquid. The invention can produce various green silicon carbide FEPA F P with grain size being less than 100mm.

A faucet includes a faucet body, a sleeve, a control valve, and a mounting seat. The control valve includes a control shaft, a stop gasket, a retaining member, a leakproof gasket, a sealing gasket, a first leakproof cap, a second leakproof cap, a control knob, and a restoring member. Thus, the sealing gasket, the leakproof gasket, the first leakproof cap and the second leakproof cap of the control valve are tightly and closely located between the control shaft and the through hole of the faucet body to seal the through hole so as to prevent the water from leaking from the through hole and to stabilize the water pressure in the faucet body.

The invention discloses a water pressure loading control system and a loading method used in a fluid-solid coupling model test. The loading control system comprises a test bench, wherein the test bench adopts seal design and a plurality layers of similar materials are laid inside the test bench; water tanks for water loading are respectively arranged in the test bench and on the similar materials; a water injection hole and a control device are arranged at the top of the test bench; and the test bench is connected with a pressure pump outside the test stand through a water pipe. The invention further discloses a pressurizing method of the system at the same time. The invention researches the external water pressure loading control system and the loading method in the model test, and solves the loading and control problems of the true water pressure in the fluid-solid coupling model test. By introducing the water pressure loading control system in the model test, the interaction of solid similar materials and water is simulated more truly than the existing research; and in this way, the fluid-solid coupling model test is more close to the engineering practice, and the obtained research result has wider application range.

The invention relates to a water pump intelligent temperature-control water supply system which ensures a basically stable water temperature of domestic water, heating water and pipe internal circulating water and saves water resource and heat energy. The system comprises a water pump, a power supply control circuit, a central control unit and a temperature sensor; wherein, an inlet of the water pump is connected with a hot water tank, an outlet of the water pump is connected with an inlet end of a water return pipe, and an outlet end of the water return pipe is connected with the hot water tank; the temperature sensor is used for detecting the temperature on the water return pipe; the central control unit is used for turning on or shutting down the water pump according to the temperature gap between the temperature measured by the temperature senor and the preset temperature; when the measured temperature is 0.5 to 3 DEG C lower than the preset temperature, the water pump is turned on; and when the measured temperature is 0.5 to 3 DEG C higher than the preset temperature, the water pump is shut down. In addition, in different periods, the central control unit turns on or shuts down the water pump through the power supply control circuit according to the temperature gap between the temperature measured by the temperature sensor and the corresponding different preset temperature.

The invention discloses a three-cylinder reverse osmosis seawater desalting and concentrated seawater energy recycling system, and relates to seawater desalting. The three-cylinder reverse osmosis seawater desalting and concentrated seawater energy recycling system comprises a power device, energy recycling devices, a reverse osmosis membrane and a water inlet pipe, wherein the power device and the water inlet pipe are both connected with the energy recycling devices; and the reverse osmosis membrane is connected with the energy recycling devices in two directions. The three-cylinder reverse osmosis seawater desalting and concentrated seawater energy recycling system is characterized by comprising three sets of mutually linked energy recycling devices, wherein each energy recycling device consists of a piston, a water pressure cylinder, a water feeding and draining valve and an energy recycling valve; the pistons are arranged on the water pressure cylinders and are connected with the power device; the water pressure cylinders are provided with raw material seawater inlets and concentrated seawater inlets; the water feeding and draining valves are connected with the raw material seawater inlets and the concentrated seawater inlets; the reverse osmosis membrane is connected with the energy recycling valves; the water inlet pipe are connected with the water feeding and draining valves; and the water feeding and draining valve are connected with waste concentrated seawater discharging ports. By the three-cylinder reverse osmosis seawater desalting and concentrated seawater energy recycling system, pressure energy of high-pressure concentrated seawater discharged by the reverse osmosis membrane is fully used, and the energy consumption is effectively reduced.

The invention relates to a combined type jet flow fish pump with an automatic control system. The combined type jet flow fish pump comprises a diaphragm-type pressure difference switch, two guide pipes which are communicated with each other are respectively arranged at the two ends of a diaphragm, one ends of the guide pipes are communicated to the walls of a front fish suction pipe a large end of a drainage taper pipe, and the other ends of the guide pipes are communicated to the walls of a front jet device suction port on a small end of the drainage taper pipe; and an upper end of a bidirectional valve rod is provided with an electric rod which is connected with the diaphragm-type pressure difference switch, the diaphragm-type pressure difference switch controls to drive the electric rod according to the pressure difference which is generated by the two sides of the diaphragm, when the pressure difference is increased, the electric rod drives the bidirectional valve rod to move downwards to close an upper valve opening and open a lower valve opening, so that the pressure difference is reset to normal, the electric rod is reset, the electric rod drives the bidirectional valve rod to move upwards to open the upper valve opening and close the lower opening. The combined type jet flow fish pump is convenient to operate, the drainage taper pipe can be prevented from being blocked due to over high fish water density, the blockage problem of the drainage taper pipe can be automatically solved, and the combined type jet flow fish pump is enabled to reliably operate.

The present invention discloses a moisture permeation and water proofing fabric, and a preparation process thereof. According to the fabric, a prime coat comprises: a polyurethane resin, butanone, toluene, water, 1,6-diisocyanatohexane and N-methylethanolamine; a first surface coating and a second surface coating comprise a polyurethane resin, butanone, toluene, water and N-methylethanolamine. The preparation process comprises: mixing 1,6-diisocyanatohexane and a main resin; mixing water and butanone to form a solvent; adding the solvent to the main resin mixing solution in at least 6 times; filtering the resulting mixed solution with a nylon net to obtain a filtered main resin solution; carrying out a deaeration treatment to form a prime coat slurry; blending a surface coating slurry with a matching solution viscosity of 3500-6000 mpas; coating the prime coat slurry on the surface of the base cloth to form the prime coat, and drying; coating the surface coating slurry on the surface of the prime coat in 2 times to form the surface coatings, and drying. In the prior art, micropores in the hydrophilic moisture permeation processing coating fabric are not uniform, and are easily expanded when contacting the water. With the present invention, the disadvantages in the prior art are solved, and the moisture permeation performance of the fabric is improved.

The invention provides a full-automatic bath and nursing robot. Spray scrubbing heads are arranged on a back scrubbing device and a hip scrubbing device and are of circular structures. Circular channels are formed in the spray scrubbing heads, water spraying holes are evenly formed in each circular channel, it is guaranteed that the parts, needing to be emphatically cleaned, of the back and the hip can be completely cleaned, and the waterflow sprayed by the water spray holes in the circular channels is smooth and mild; massage protrusions which protrude outwards are arranged on the spray scrubbing heads, shower lotion extrusion heads are arranged in the middles of the massage protrusions, a user extrudes the shower lotion extrusion heads when sitting on the back scrubbing device and the hip scrubbing device, shower lotion can be automatically extruded to coat the back and hip, the waterflow sprayed by the water spray holes in the circular channels is used for washing, and bath washingfor the whole body is achieved; the spray scrubbing heads are movably installed on arc elastic strips and can rotate and conduct rotation scrubbing motion on the arc elastic strips, and the robot hasthe functions of automatic bath, scrubbing, massage and health care.

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 is equipped with a vibration triaxial measuring apparatus of confined pressure stabilizing compensator, the machine rack is equipped with triaxial cell, the upper part is equipped with force transmission axis, the upper part of the force transmission axis connecting bar is equipped with axial direction servo-hydraulic system, the power cylinder pulls the force transmission axis through the oil cylinder piston, the bottom part of the force transmission axis is equipped with sample hat, the connecting bar of the force transmission axis is also equipped with a load cell; the side of the triaxial cell is equipped with confined pressure pressurization system, the system is equipped with lateral water cylinder, which is characterized in that the confined pressure compression system is equipped with confined pressure stabilizing compensator, the structure is that: the lateral water tank is connected with lateral fluid pressure cylinder, at the same time the upper part of the power cylinder is equipped with water cylinder which is connected with force transmission axis coaxially in series, and is connected with lateral water tank through pressure-proof steel hollow steel tube. The invention solves the problem that the lateral confined pressure is not sufficient in prior art, or the confined pressure fluctuation range is too large, which exceeds the allowable error, the confined pressure is stable when the invention is vibrated in axial direction, the confined pressure fluctuation range does not exceed 2the confined pressure value. At the same time, the lateral confined pressure can be added up to 5MPa.

The present invention discloses a full automatic control water jet condenser with characteristics of a concentric diameter changing throat part, temperature control, constant water pressure and adjustable nozzles, wherein the full automatic control water jet condenser is used in sugar refineries. The full automatic control water jet condenser is characterized in that part of spray nozzles and jet nozzles arranged in a water chamber are nozzles provided with a pneumatic opening and closing control device, a throat part of the condenser is provided with a concentric diameter changing throat part device, and the pneumatic opening and closing controlled nozzles and the concentric diameter changing throat part device can jointly act and perform adjustment control according to a water temperature and a water supply amount of water entering the condenser water chamber. According to the present invention, a pressure transmitter for detecting a vacuum degree of a container (a sugar boiling tank or an evaporation tank), a temperature transmitter for detecting a temperature of a material (a syrup and a sugar paste) inside the container, and a pressure transmitter for detecting water pressure inside the water chamber jointly adjust and control an opening degree of an automatic control water inlet valve, such that the condenser can achieve a high vacuum degree under a normal production condition, and can achieve a preset vacuum degree and a preset material temperature during production condition changing, wherein the existing wet type water jet condensers used in sugar refineries at home and abroad do not have the advantages of the condenser of the present invention.

The invention relates to an energy-storage manual seawater desalting device that drives energy-storage continuous over current through manual power and is processed through inverse penetration, comprising an energy storage mechanism connected with a manual mechanism, and an inverse penetration unit connected with the energy storage mechanism through a water inlet valve, wherein a water holding bin with a water inlet is connected with a first one-way valve at one side of a first piston cavity, and a high pressure energy storage water bin of the energy storage mechanism is connected with a second one-way valve at the other side of the first piston cavity. The energy storage mechanism comprises a second piston cavity having an opening in the same direction of the water inlet valve, an energy storage piston installed at the opening end of the second piston cavity, and an energy storage medium installed between the energy storage piston and the bottom of the second piston cavity. The inverse penetration unit comprises a housing, a rotary water pipe arranged in the housing and respectively connected with the water inlet valve and a condensed water discharging valve, a inverse penetration film connected with the rotary water pipe in series, a water generating opening and a condensed water discharging valve respectively arranged at the tail end of the rotary water pipe.

The invention provides a buffer and diversion water hammer eliminator which comprises an inner piston buffer part and an outer steady-pressure diversion part which are coaxially arranged inside and outside, wherein the inner piston buffer part comprises an outer wall of the inner piston buffer part as well as an upper piston and a lower pressure regulating piston which are arranged inside the inner piston buffer part; the lower pressure regulating piston is connected with an upper piston through a pre-pressing spring; the top and the bottom of the outer wall of the inner piston buffer part are respectively connected with upper and lower sealing plates; a sealing flange is arranged above the upper piston; the outer wall of the inner piston buffer part is provided with a pressure discharge hole; the outer steady-pressure diversion part comprises an outer wall of the outer steady-pressure diversion part, wherein the outer wall of the outer steady-pressure diversion part is arranged on the outer part of the outer wall of the inner piston buffer part, and the top and the bottom of the outer steady-pressure diversion part are respectively connected with outer walls of the outer steady-pressure diversion parts of the upper and the lower sealing plates; and a breathing water drain-off valve is arranged outside the outer wall of the outer steady-pressure diversion part. The invention further provides a using method of the buffer and diversion water hammer eliminator. The buffer and diversion water hammer eliminator can effectively eliminate a water hammer phenomenon in a water supply process of a water pump, so that a pipe network is kept at stable water pressure, and therefore, safety of a water supply system is guaranteed.

The invention discloses a residual water drainage and water suction non-return mechanism, which comprises a fixed part and a water drainage and air suction assembly, wherein the fixed part comprises an upper part provided with a through hole, a lower part provided with a water outlet hole and a water drainage and air suction hole, and an assembly cavity; the water drainage and air suction assembly comprises a body, a ring part formed by extending outwardly from the upper circumference of the body, and a jacking spring; the outer circumference of the ring part and the inner wall of the assembly cavity are sealed; the ring part is provided with small holes; and the body can be covered and connected to the water drainage and air suction hole, and is provided with a cut-through ventilation hole. When a water source is switched on, running water impacts the body through the through hole, the body slides downwardly till the body hermetically leans on the lower part and is hermetically covered and connected outside the water drainage and air suction hole, running water flows inwards from the small holes on the ring part for generating strong negative pressure, air is sucked inwards alongthe water drainage and air suction hole and the ventilation hole under the action of the negative pressure, and the air is fully mixed with the running water in the assembly cavity, so that bubble water is formed; and when the water source is switched off, the body slides upwards under the action of the jacking spring, and the body moving upwards is prevented from returning, so that residual water in a sprinkler is prevented from increasing, and is quickly drained along the space between the body and the lower part as well as the water drainage and air suction hole.

The invention provides a full-automatic bathing and nursing robot. By means of a movable chair type structure, the functions of assisting a bathing user in standing, leg scrubbing and washing, hip scrubbing and washing, back scrubbing and washing and head bathing during bathing are completed, and the mechanical structure capable of automatically adapting a human body curve is adopted for each scrubbing and washing mechanism; the head of the user can be accurately positioned, automatic positioning and hair washing are realized, a plurality of claw-shaped head scrubbing devices are arranged on acap shell and can almost cover the whole head, a spring plate continuously deforms and stretches out under the reciprocation of a guide rod, and then the actions of scrubbing and washing the hair andmassaging the head by human hands are simulated. A water pressure sensor and a water pressure valve are arranged on a water inlet pipe, the water pressure and water inlet amount of the water inlet pipe are controlled in real time, the stable water pressure during bathing is ensured, and the user is comfortable to bathe due to the proper water volume and water pressure; a drain hole is formed in awater outlet pipe, automatic water inputting and draining can be achieved, and indoor water accumulation is avoided.

The present invention discloses a method for centrally-supplying hot water by collecting ehat energy from air and its equipment. Said equipment includes heat pump assembly, circulating water pump, hot water storage container and intermediate water storage contanier. Said invention also provides the concrete structure of the above-mentioned every portion, and provides their connection mode and action. Said invention equipment is compact in structure, reliable in performance, high in heat efficiency and low in cost, and can effectively supply stable temp and pressure hot water.

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 provides an automatic flow rate adjusting device, which is characterized by comprising a shell (201), a cylindrical body (203) containing a tapered hole, a first magnet (205), and a second magnet (204), wherein a taper bottom side opening of the tapered hole of the cylindrical body (203) is communicated with a water inlet of the shell (201), and a taper top side opening is communicated with a water outlet of the shell (201); the second magnet (204) is movably arranged in the tapered hole of the cylindrical body (203); and the first magnet (205) is fixed in the shell (201). The automatic flow rate adjusting device automatically adjusts the drift diameter size of water flow at the water inlet by a magnetic induction mode, keeps the water flow at a constant pressure, achieves the function of stable pressure, and solves the problem of momentary sudden cold and sudden hot at the water outlet when the flow rate or the pressure at the water inlet of a water heater is decreased or increased suddenly.

The invention discloses a membrane treatment process device and a processing method thereof. The device comprises a low-energy-consumption micro-nano bubbling water generating device, a water inlet pipe, a bottom valve, a raw water pool, a one-way valve, an ultrafiltration water inlet pipe and an ultrafiltration membrane module. The device has the advantages that the adopted low-energy-consumption micro-nano bubbling water generating device substitutes a membrane process water inlet centrifugal pump process, so that membrane water inlet is not merely water but is micro-nano bubbling water containing a great number of micro-nano bubbles, a great number of micro-nano bubbles exist in the bubbling water, scaling substances cannot adhere easily, original scaling substances are even gradually peeled by the micro-nano bubbles, chemical agents such as antisludging agents do not need to be added, back-flushing is not needed, the service life of a membrane is greatly prolonged, water producing capability is enhanced, air inflow amount is adjustable, the vapor-liquid ratio can be adjusted to 20-100%, by means of the one-way valve, the bubbling water cannot backflow from the ultrafiltration membrane module, it is guaranteed that the water pressure in the ultrafiltration membrane module is stable, and the filtering effect of the ultrafiltration membrane module is guaranteed.

The present invention discloses a method for centrally-supplying hot water by collecting ehat energy from air and its equipment. Said equipment includes heat pump assembly, circulating water pump, hot water storage container and intermediate water storage contanier. Said invention also provides the concrete structure of the above-mentioned every portion, and provides their connection mode and action. Said invention equipment is compact in structure, reliable in performance, high in heat efficiency and low in cost, and can effectively supply stable temp and pressure hot water.

The invention discloses a system for measuring pipe network outside source invasion via a volume method, which comprises: an invasion pipeline, a water tank, an observation tube, a liquid level sensor and a pressure sensor, wherein the invasion pipeline is communicated with the main pipe of a pipe network and provided with an invasion opening; the water tank is used for storing water flow output from the invasion pipeline; the observation pipe is communicated with the water tank and used for observing the variation of a water level; the liquid level sensor is installed in the water tank to measure the variation of the water level so as to calculate the actual value of the pipe network outside source invasion; the pressure sensor is installed in the main pipe, used for measuring the hydraulic pressure change in the main pipe, and combined with the pressure change data measured by the liquid level sensor to calculate the theoretical value of the pipe network outside source invasion; the invention also discloses a method for measuring pipe network outside source invasion via a volume method; by means of comparing the actual value with the theoretical value, the system for measuring the pipe network outside source invasion via the volume method amends the theoretical value, improves the measurement accuracy, and is also provided with the water tank for stabilizing the hydraulic pressure and the liquid level sensor that replaces a video cassette recorder to record the variation of the water level of the observation tube, so that the experiment operation is simpler, the data accuracy is higher, and the data processing is more convenient.

The invention discloses dispersion test equipment suitable for low-permeability soil. The dispersion test equipment comprises a water pressure chamber and a permeameter chamber for accommodating a testing earth-pillar; the water pressure chamber communicates with a pressurizing chamber; the permeameter chamber is arranged in the water pressure chamber and comprises a top disc of the permeameter chamber, a bottom disc of the permeameter chamber and a cylindrical flexible side wall, wherein the top disc of the permeameter chamber and the bottom disc of the permeameter chamber are hermetically connected to two ends of the flexible side wall, separately; and the bottom disc of the permeameter chamber is connected to a tracer agent injection assembly, and the top disc of the permeameter chamber is connected to a tracer agent collecting and detecting assembly. The dispersion test equipment disclosed by the invention has the advantages that under the water pressure action of the water pressure chamber, the testing earth-pillar is tightly wrapped by the flexible side wall, so that side wall permeation caused by a gap between the testing earth-pillar and the flexible side wall is avoided; meanwhile, the testing earth-pillar is kept in a tight state by means of the water pressure, and is unlikely to break.

A mining-affected coal seam floor water inrush simulation testing system comprises a simulation testing device, an operating console and a water pressure control device. The operating console is connected with the simulation testing device and the water pressure control device through control cables respectively, the water pressure control device is connected with the simulation testing device through a water inlet pipe, and the simulation testing device comprises an outer frame and a testing table arranged in the outer frame. According to the mining-affected coal seam floor water inrush simulation testing system, the testing table which is good in sealing property is arranged in the middle of the outer frame, a test sample is put on the testing table, longitudinal stress and transverse stress are applied, a coal seam is excavated to collect relevant data, the changes of the high water pressure and the floor lithological character and the overall floor water inrush process are simulated, and therefore the relevant data of floor water inrush is obtained and applied to production operation, and the safety of coal-mining operation is improved. According to the mining-affected coal seam floor water inrush simulation testing system, operation is easy, the sealing property is good, the automation degree is high, and the testing result is precise and more close to practice.

The invention discloses an adjustable pressure type gas water heater which is characterized in that an expansion tank, a water pressure sensor and a booster pump are arranged in a gas water heater shell; the expansion tank communicates with a gas water heater water inlet pipe through a bypass pipe; the bypass pipe is provided with an electric stop valve; the water pressure sensor and the booster pump are connected in series on the gas water heater water inlet pipe; and one controller is connected with the water pressure sensor, the booster pump and the electric stop valve and controls actions of the booster pump and the electric stop valve according to a signal fed back by the water pressure sensor. The adjustable pressure type gas water heater has the functions of increasing and stabilizing the water pressure. As for a user with higher requirements for bathing, the water pressure can be set at a specific value, and the pressure of the gas water heater can be adjusted automatically according to variation of the water pressure (at water using peak and non-peak) so as to ensure the final pressure to be stable, so that the service life of a machine is prolonged when the bathing comfort is guaranteed.

The invention discloses a water-feeding pump system driven by a high-speed synchronous motor, and relates to an efficient, energy saving and speed governing electric water-feeding pump system which is used in a large and medium-sized thermal power generating unit. The water-feeding pump system comprises a low rotational speed front-mounted pump, a low rotational speed front-mounted pump motor, an intermediate frequency variable-frequency power supply, a high-speed synchronous motor, a high rotational speed water-feeding pump and a static excitation device, wherein the high-speed synchronous motor is driven by the intermediate frequency variable-frequency power supply; the rotational speed is steplessly adjustable in a range from 60 rpm to 6,000 rpm; and the high-speed synchronous motor and the high rotational speed water-feeding pump are in direct connection through opposite wheels. Problems that an existing speed governing electric water-feeding pump adopts speed governing operation of a speed increase gear and a hydrodynamic coupler, the transmission loss is large, the response speed is slow, the adjusting dead zone is large, impact of starting on station service buses is obvious and the like are solved. The comprehensive transmission efficiency of the water-feeding pump system driven by the high-speed synchronous motor is higher than that of a steam feed pump system remarkably, heat consumption of a steam turbine generator unit is reduced remarkably, and the net coal consumption rate of the generator unit is decreased.

The temperature controlled valve core includes one middle casing with the first water inlet channel and the second water inlet channel; one water outlet casing with water outlet channel connected to one end of the middle casing and one pressing casing connected to the other end of the middle casing. Inside the middle casing, there are a valve core as an axially limited hollow cylinder, two first grooves and two second grooves on the outer surface of the valve core and in the positions near the first water inlet channel and the second water inlet channel separately; the first axially positioned elastic ring and the second elastic ring separately in the first grooves and two second grooves, and one sealing ring set between the first grooves and the second grooves. The first water inlet channel is communicated with the water outlet channel through the first grooves, and the second water inlet channel through the second grooves. The present invention has precise temperature setting, stable temperature stabilizing effect and high reliability.

The invention relates to the technical field of civil engineering materials testing, in particular to a multifunctional linkage device integrating sewage time-sharing sampling and permeation coefficient testing and a working method of the multifunctional linkage device. The device mainly comprises two parts, wherein a first part is a device A and mainly comprises a power supply channel, a cylindrical overflow port, a water cylinder, an overflow water tank, a water tank overflow port, a test sample bracket, a test sample, a dial gauge, a sewage sampling pipe, a high-precision flow gauge, an electronic thermometer, a working table I and the like; a second part is a device B and mainly comprises a working water bucket, a water draining bucket, a propeller, a water pump, a power switch, a water pump electronic control assembly, a propeller electronic control assembly, a guide rod rotation driver, a working table II and the like; the device A and the device B are connected through one water supply guide pipe and two water draining guide pipes, and accordingly, the multifunctional linkage device is formed. Therefore, the condition of sewage permeation of a porous pavement in a real environment can be simulated, samples of sewage filtered by the test sample are obtained at different moments, the permeation coefficient of the test sample is tested simultaneously, the water resource is recycled, and the operation is simple.

The invention discloses a manufacturing process for a novel functional fabric. The manufacturing process mainly comprises the following steps: 1) water spraying of a dyed fabric for setting; 2) calendering before sizing; and 3) one-knife PU resin functional coating treatment: performing one-knife PU resin functional coating treatment on a calendered surface, wherein a functional coating comprises,by mass, 60-70 parts of two-component polyurethane resin, 25-30 parts of one-component polyurethane resin, 5-10 parts of AC glue, 1-3 parts of a silicon-series dry agent, 1-2 parts of a bridging agent and a solvent X, and the usage amount of the solvent X is added with the viscosity of a rubber compound of 15000 CPS as the criterion. According to the invention, a one-knife coating process is adopted, so the novel functional fabric has the functions of low water pressure, high moisture permeability and UV resistance, and further has the advantages of light weight, thinness, easy storage, comfortable wearing, reduced environmental pollution, etc.