96 results about "Backwater valve" patented technology

The utility model discloses a wet oxygen process system which comprises a pure water circulating unit, a wet oxygen unit and a drainage unit, the pure water circulation unit comprises a water inlet pipe section, a circulation pipe section and a water return pipe section which are sequentially connected, an inlet of the water inlet pipe section and an outlet of the water return pipe section are connected with a peripheral pure water source, an outer circulation connecting pipe is arranged between the water inlet pipe section and the water return pipe section and provided with an outer circulation valve, and a water inlet valve is arranged at the water inlet end of the circulation pipe section. A water return valve is arranged at the water outlet end of the circulating pipe section; a plurality of water inlet branch pipes are arranged on the circulating pipe in parallel, the water inlet branch pipes are connected with the corresponding wet oxygen units one by one and used for supplementing pure water needed by the wet oxygen units, and water drained by the wet oxygen units is drained to the periphery through the drainage unit; and the circulating pipe section is also provided with a water quality detector, a water outlet and a first water discharge valve. According to the system, the quality of pure water in the internal main pipeline can be kept, the water quality can be conveniently monitored in real time, and little water is wasted during water changing.

A backwater valve has a hollow valve body having an inlet and an outlet, and a valve member pivotally movable about a pivot axis disposed above the inlet. The valve member pivots between an open position in which the valve member is away from the inlet and a closed position in which the valve member closes the inlet. A cam is rotatably mounted above the inlet. The cam has a first rotary position in which the valve member is permitted to move to the open position and a second rotary position in which the cam engages the valve member to secure the valve member in the closed position. With the valve member in the open position, the cam pushes the valve member toward the close position as the cam moves toward the second rotary position.

The intelligent direct drinking machine comprises a first purification device, a second purification device, a pressure barrel and a water tank, a water inlet pipe is arranged on the first purification device, and a water outlet pipe and a heating assembly are arranged at the bottom of the water tank; a drain valve and a delivery pump are arranged on the water outlet pipe; a water return pipe is arranged at the water using end; a water return valve is arranged on the water return pipe; and a high-water-level probe and a low-water-level probe are respectively arranged at the top and the bottom of the water tank. Unused purified water in the water return pipe flows back to the water tank, reheating is conducted on the refluxed purified water through the heating assembly, and the unused purified water flows back to the water tank regularly, so that it is ensured that the water temperature of the water using end is consistent with the temperature of the purified water in the water tank all the time, energy consumption is effectively reduced, cold water does not need to be supplemented for heating, and energy consumption is reduced. And compared with the prior art, the water path retention problem is effectively solved, the energy consumption can be effectively reduced, and the temperature control precision is improved.

A backwater valve cover configured to prevent a backwater valve opening from releasing toxic soil gases into a home includes a base and a lid. The base is configured to be installed above a backwater valve. The base includes a central access opening, a first plurality of fastener holes configured to accept a first plurality of fasteners, and a second plurality of fastener holes configured to accept a second plurality of fasteners. The lid is configured to cover the central access opening and be fastened to the base via the second plurality of fasteners.

The invention provides an efficient copper electrolysis anode slime dehydration method, belongs to the technical field of filter pressing, and solves the problem that whether a diaphragm of an anode slime filter press leaks or not cannot be detected in the existing anode slime dehydration use process. Adjusting the water pressure to a target pressure value through an overflow valve; a pressure sensor on the anode mud dehydration device is used for monitoring and feeding back the pressure in a diaphragm in real time, and punching is adjusted or stopped according to data fed back by the pressure sensor arranged between the water storage tank and the multi-stage centrifugal pump; accumulated water in the diaphragm is discharged to the water storage tank through the water return valve for collection and utilization, and the radar liquid level meter monitors the liquid level of the water storage tank. According to the method, the diaphragm pressure of the anode mud dehydration device is set and monitored, the diaphragm state is detected in real time, the dehydration effect is ensured, the water supplementing function is achieved, the dehydration efficiency is improved, the monitoring capacity is enhanced, automatic operation is achieved, and equipment and facilities are protected against corrosion.

The utility model relates to a water pressure adjustable mobile water spraying test water supply device, which comprises a water bucket and a water pump arranged on the outer side of the water bucket, a connecting pipe extends out of the lower part of the water bucket and is communicated with the water pump, the water pump supplies water to a water spraying pipe through a water supply pipe, and the upper part of one side of the water supply pipe close to the water pump is provided with a bypass and a water return pipe; the water return pipe is used for returning part of water from the water pump back to the bucket to reduce the water pressure supplied to the water spray pipe by the water supply pipe; a water return valve is arranged on the water return pipe, and the water return flow of the water return pipe is adjusted by adjusting the water return valve, so that the water spraying pressure of the water spraying pipe in the water spraying test is adjusted; according to the movable water spraying test water supply device with the adjustable water pressure, a high-grade water pump does not need to be replaced, the water return pipe with the water return valve is arranged on the basis of existing equipment, the spraying pressure can be adjusted with low cost, and the movable water spraying test water supply device has good application prospects.

The utility model relates to the technical field of water treatment, in particular to a soft water treatment device which comprises a filter, a water inlet pipe, a water outlet pipe, a water inlet pipe and a water outlet pipe, the first water outlet valve is arranged at the position, close to the water outlet, of the water outlet pipe and used for controlling the water outlet to be opened or closed; the ion concentration detector is arranged on the water outlet pipe and is used for monitoring the ion concentration of the soft water discharged into the water outlet pipe from the filter; a water return opening is formed in the water outlet pipe between the water outlet and the ion concentration detector; one end of the water return pipe is communicated with the water return port, the other end of the water return pipe is communicated with the filter, and the water return pipe is used for discharging soft water with substandard ion concentration into the filter to be softened again; the water return valve is arranged at the position, close to the water return opening, of the water return pipe and used for controlling the water return opening to be opened or closed. The problem that the ion concentration of soft water discharged from the water outlet cannot meet the standard requirement is solved.

The utility model relates to the technical field of primary coolers, in particular to a descaling device for a primary cooler, which is characterized in that a backwashing water return valve is connected to a cooling water feeding pipe in parallel, a gas-water pulse flow feeding valve is connected to a cooling water return pipe in parallel, a gas-water mixing device, an ultrasonic flowmeter and a gas flowmeter are arranged at the tail end of the gas-water pulse flow feeding valve, and the gas-water mixing device is connected with the ultrasonic flowmeter and the gas flowmeter. The other end of the ultrasonic flowmeter is connected with a ball valve through a pipeline, the other side of the gas flowmeter is connected with a pressure stabilizing device through a pipeline, and the other end of the pressure stabilizing device is connected with an air compressor through a pipeline. The gas-water mixing device comprises a main pipe section, a backwashing water inlet interface, a backwashing gas inlet interface, a pressure sensor interface and a guide plate; the gas-water pulse flow water feeding valve and the backwashing water return valve are connected to the cooling water feeding pipe and the cooling water return pipe in parallel, so that the primary cooler pipeline is easier and more efficient to clean, the service life of the primary cooler is prolonged, and the effects of reducing cost and improving efficiency are achieved.

The invention belongs to the technical field of steelmaking and continuous casting, and particularly relates to a system and method for remotely controlling accident water through a continuous casting machine by applying PID. The system comprises a first connecting pipe, a machine cooling pump, an accident water tank, an accident water inlet pipe, an accident water return pipe, a second connecting pipe and a PID control unit. A water return port of the continuous casting machine is connected with one end of the machine cooling pump through a first connecting pipe, and the other end of the machine cooling pump is connected with a water inlet of the continuous casting machine through a second connecting pipe. The accident water tank is connected with the second connecting pipe through an accident water inlet pipe; the PID control unit comprises an accident water return valve control unit and a PIC control unit; the accident water return valve control unit is arranged on the accident water return pipe; the PIC control unit is connected with the first connecting pipe; and the accident water return valve control unit is connected with the PIC control unit. Based on the system and the method, the problems that a traditional accident water control method is large in error, insufficient in reliability, weak in anti-interference capacity and high in maintenance cost can be solved.

The utility model discloses an air source heat pump water heater capable of automatically returning water, which comprises an air source heat pump water heater, and the air source heat pump water heater comprises a water storage tank. One end of the hot water supply pipe is connected with the water storage tank, and the other end is connected with the user-side water supply device; the temperature control water return valve is mounted at the tail end of the hot water supply pipe; one end of the water return pipe is connected with the temperature control water return valve and the other end is connected with the water return interface of the water storage tank; and the one-way backflow device is arranged on the water return pipe. Through reasonable configuration of the temperature control water return valve and the water return pipe, when the water temperature in the hot water supply pipe is lower than a set value, the temperature control water return valve is automatically opened, cold water in the pipe flows back to the water storage tank through the water return pipe, automatic backflow of the cold water is achieved, and the problems that a traditional air source heat pump water heater is long in hot water waiting time and cold water is wasted are effectively solved; the utilization rate of water resources is improved, and the user experience is improved.

The invention discloses a cooling tower water collecting tray cleaning method and an automatic cleaning device thereof.The method specifically comprises the following steps that S1, preparation before cleaning is conducted, specifically, before a certain cooling tower starts to be cleaned, firstly, an automatic water supplementing valve, a blow-down valve and a water return valve of the cooling tower are accurately found and closed through a control system, and in the closing process, the blow-down valve and the water return valve are closed; the closing state of the valve is closely observed to ensure that the valve is completely closed, and water is prevented from flowing in or out in the cleaning process to affect the cleaning effect and cause waste of water resources. Through mutual cooperation of the first guide rail, the second guide rail, the first brush, the second brush, the first power assembly, the second power assembly, the first power steering assembly, the second power steering assembly and the control box, cleaning of the cooling tower water collecting tray is achieved, the cleaning problem is solved, the operation difficulty is remarkably reduced, the cleaning process is standardized, and the cleaning efficiency is improved. The cooling water quality is practically guaranteed, the heat exchange efficiency is improved, and the cooling function is fully played.

The application relates to the technical field of spraying equipment control and discloses a control method of spraying equipment, which comprises the following steps: initializing a plurality of modules based on a control module; unfolding a plurality of spraying rods; driving a winch module to lower a hoisted spraying rod module; sequentially opening spraying valves and spraying pumps in the valve pump module to supply materials to the spraying rod module through spraying pipelines; acquiring a first pressure value; when the first pressure value is greater than a starting pressure value, controlling a motion module to drive the spraying equipment to move along a first route; when the spraying equipment moves to the end point of the first route, sequentially closing the spraying pump and the spraying valve; opening a spraying backwater valve, then opening a cleaning pipeline pump, releasing cleaning liquid into the spraying pipeline for cleaning and continuing for a first cleaning time, and closing the cleaning pipeline pump and the spraying backwater valve; moving to the starting point of the first route; driving the winch module to lift the spraying rod module, and recovering the spraying pipeline; and resetting the spraying rod.

The present invention discloses a local cleaning system and method for the secondary circuit side of a nuclear power direct current steam generator. A demineralized water inlet and a chemical dosing port are provided on the cleaning tank. A cleaning tank liquid level gauge is arranged inside the cleaning tank. A main feed water temporary blind plate is provided on the main feed water connection section of the steam generator; a main steam temporary blind plate is provided on the main steam connection section of the steam generator. The outlet of the cleaning tank is connected to the water inlet on the main feed water temporary blind plate through a cleaning pump. The water outlet on the main feed water temporary blind plate is divided into two paths. One path is connected to the inlet of the waste liquid tank through an exhaust valve, and the other path is connected to the inlet of the cleaning tank through a return water valve. The liquid level measurement port on the main feed water temporary blind plate is connected to one end of a temporary liquid level gauge, and the other end of the temporary liquid level gauge is connected to the liquid level measurement port on the main steam temporary blind plate. This system and method have the characteristics of short cleaning cycle, low consumption of chemicals and demineralized water, small equipment volume, and low cost.

The present invention discloses a connecting valve, a return water valve, a pressure valve assembly and a water supply system. The return water valve includes a valve body and a linkage valve. The valve body is provided with a hot water flow channel, a cold water flow channel and a one-way flow channel; the hot water flow channel includes a water inlet cavity, a communication cavity and a water outlet cavity, the communication cavity has a water inlet communicating with the water inlet cavity, and a water outlet communicating with the water outlet cavity; the one-way flow channel connects the communication cavity with the cold water flow channel. The linkage valve is arranged in the hot water flow channel and is adapted to switch between an initial position and an open position; wherein: in the initial position, one end of the linkage valve blocks the water outlet, and a gap is formed between the other end of the linkage valve and the water inlet; in the open position, the linkage valve opens both the water inlet and the water outlet. The return water valve of the present invention can solve the problem that the water in the hot water flow channel flows into the cold water flow channel when the water supply system uses the cold water mode.

The utility model discloses a pipeline water seepage detection device which comprises a moving trolley, a water tank, a water pump, a water pipe and a water pressure gauge are installed on the moving trolley, the water pipe is connected with the water tank, the water pump is installed on the water pipe, a pipeline connector is arranged on the water pipe, and the water pressure gauge is connected with the water pipe through a first three-way pipe. A water return pipe is connected to the water tank and connected with the water pipe through a second three-way pipe, a water return valve is installed on the water return pipe, and the control valve is located between the second three-way pipe and the water pump. The pipeline water seepage detection device has the advantages of being convenient to move, easy to operate and high in adaptability. And test water can be partially recycled, so that water waste is reduced.

The utility model discloses a die-casting die rapid cooling device which comprises a water supply station assembly, a die, a water return tank, a water supply valve assembly, a water return valve assembly and a high-speed cooling station assembly. The water supply station assembly comprises a cooling water tank, a cavity cooling pipeline and a pouring gate, a water inlet of the sprue spreader cooling pipeline is connected with a cooling water source through a water supply valve assembly, a water outlet is connected with a water return tank through a water return valve assembly, and a water outlet of the cooling water tank is connected with the pouring gate and a water inlet of the sprue spreader cooling pipeline; the high-speed cooling station assembly comprises a plurality of vacuum tanks, air inlets of the vacuum tanks are provided with exhaust pipes and water inlet pipes respectively, the other ends of the water inlet pipes are connected with water outlets of the pouring gate and the sprue spreader cooling pipeline through water return valve assemblies, and water drainage pipes are arranged on water drainage ports of the vacuum tanks. According to the utility model, the die can be efficiently cooled in an energy-saving manner, the cooling process is controllable, safe, reliable and quick in response, and the production efficiency is greatly improved.

The invention discloses a pump body with a self-suction function, and relates to the technical field of water pumps, the pump body comprises a pump shell, a multi-stage impeller mechanism is arranged in the pump shell, a rotating shaft on the multi-stage impeller mechanism is driven by a motor, and a water inlet hole, a main water return hole and a water inlet of the multi-stage impeller mechanism are communicated through a water inlet cavity; the device further comprises a check valve mechanism and a water return valve mechanism. The check valve mechanism comprises a check valve seat, the check valve seat is in spiral connection with the water inlet hole, a movable check valve element is arranged on the check valve seat, a check valve elastic piece, a check valve nut and a check valve sealing gasket are arranged on the check valve element, the check valve nut is in spiral connection with the check valve element, one end of the check valve elastic piece abuts against the check valve nut, and the other end of the check valve elastic piece abuts against the check valve sealing gasket. The other end of the spring abuts against the check valve seat; and the water inlet is respectively communicated with the water outlet hole and the auxiliary water return hole through the water outlet cavity. The check valve mechanism is convenient to disassemble and assemble; and a better self-suction operation effect is achieved.

The invention discloses a working medium multistage recovery system and method for frequent start and stop of a thermal power generating unit, and belongs to the technical field of energy conservation and emission reduction of thermal power plants. The system comprises a heat storage container; an inlet of the heat storage container is connected with a steam turbine drainage device, a boiler drainage device and an environment-friendly drainage device. An outlet of the heat storage container is connected to an inlet of the heat exchange unit through a recovery pipeline; the inlet of the heat exchange unit is further connected with a water outlet of the operation unit through a condensed water incoming adjusting valve. An outlet of the heat exchange unit is respectively connected with water inlets of the waste heat recovery container and the operation unit; and a condensed water return adjusting valve is arranged on a pipeline between the outlet of the heat exchange unit and the water inlet of the operation unit. According to the invention, gradient utilization of energy is realized, the temperature of condensed water entering an operating unit is increased, the fuel consumption required by boiler heating is reduced, the energy cost is reduced, and the energy utilization efficiency of the whole thermodynamic system is also improved.

The application discloses an engine, which comprises a cylinder head water jacket, a cylinder body water jacket, an oil-water exchanger and a thermostat, all of which are used for circulating cooling liquid; the oil-water exchanger and the thermostat are both communicated with a cylinder head water outlet of the cylinder head water jacket and with the cylinder body water jacket; a backwater part is provided with a backwater channel and a backwater valve for the flow of the cooling liquid; the backwater part is respectively communicated with the cylinder head water outlet and the cylinder body water jacket; when a main valve of the thermostat is closed, the backwater valve is opened to make the backwater channel in a conducting state; when the main valve of the thermostat is opened, the backwater valve is closed to make the backwater channel in a cut-off state. The engine provided by the application is provided with the backwater part between the cylinder head water jacket and the cylinder body water jacket; when the main valve of the thermostat is in a closed state, part of the cooling liquid can flow into the cylinder body water jacket through the backwater part, the flow into the oil-water exchanger is reduced, the influence on the oil-water exchanger is improved, and the service life of the oil-water exchanger is prolonged. The application further discloses a motorcycle.

This application relates to an adaptive temperature control method for a water heater and a water heater in general. The method includes: acquiring a preset outlet water temperature of the water heater and setting the current outlet water temperature to be equal to the preset outlet water temperature; activating a test preheating function, acquiring and recording the circulating water flow rate and the arrival time of the hot water at the return valve, and then deactivating the test preheating function; when activating the normal preheating function, compensating the outlet water temperature with a temperature compensation value determined based on the circulating water flow rate and arrival time. This method can determine a suitable temperature compensation value for each water point, regardless of the varying pipe lengths, avoiding gas waste caused by excessively high temperature compensation values ​​and gas waste caused by excessively low temperature compensation values ​​leading to excessively long preheating times.

A backwater flow detection device for detecting backwater flow between a building and a sewer conduit using air pressure detection in air pockets in the sewer conduit. The backwater flood detection device detects backwater flow events including backflow events from a sewer line as well as wastewater blockage events that can result in wastewater backflow into a building. The water detection sensor allows the homeowner or building manager to be warned when there is an issue with backwater flow in or near the building, and also with the backwater valve.

The utility model discloses a medium-pressure normal-temperature water circulation type vaporizer device, which belongs to the technical field of oxygen production and comprises a liquid pump, a vaporizer and a circulating water pool filled with medium-pressure normal-temperature circulating water. An air supply pipe connected with the liquid pump penetrates through the vaporizer; the circulating water tank is provided with a water inlet pipeline and a water return pipeline; a circulating water inlet pipe of which the other end is connected with the top of the vaporizer is arranged on the water return pipeline; the bottom of the vaporizer is connected with the circulating water tank through a circulating water return pipe; a water inlet valve is arranged on the circulating water inlet pipe; a water return valve is arranged on the circulating water return pipe; and a temperature measuring point is arranged at the bottom of the vaporizer. The problems of a steam type water bath vaporizer and a circulating hot water water bath vaporizer are solved at the same time, the temperature of medium-pressure normal-temperature circulating water can be reduced, the number of running fans is reduced, and the power consumption of equipment is further reduced.

The utility model discloses a radiation floor air conditioning system with an energy storage water tank, which belongs to the technical field of air conditioners and comprises a radiation floor pipe network and a fresh air fan which are both connected with the energy storage water tank. The energy storage water tanks comprise high / low-grade energy storage water tanks with the same volume; the radiation floor pipe network is connected with the low-grade energy storage water tank through a radiation floor pipeline; the fresh air fan is connected with the high-grade energy storage water tank through a fresh air fan water supply / return pipeline; the high-grade energy storage water tank is connected with the low-grade energy storage water tank through a water tank bypass pipeline; the radiation floor pipeline comprises a radiation floor water supply / return valve, a radiation floor water supply pump and a mixed water temperature control center; the system further comprises a system operation control logic module, and the fresh air ventilator, the radiation floor water supply / return valve, the radiation floor water supply pump and the mixed water temperature control center are all connected with the system operation control logic module. Return water of a fresh air machine is introduced into a radiation floor pipe network, secondary utilization of cold water / hot water in the fresh air treatment process is achieved, and gradient energy is effectively utilized.

The invention provides an underground rock stratum water outlet section fine exploration physical simulation experiment device and method.The underground rock stratum water outlet section fine exploration physical simulation experiment device comprises a water storage tank, the water storage tank is connected with a water pump, the water pump is connected with one ends of a plurality of water supply valves through one-way valves, and the other ends of the water supply valves are connected with rock bins in a one-to-one correspondence mode; the rock bins are vertically installed on the side wall of the simulation drilling pipe. Flange end covers are installed at the two ends of the simulation drilling pipe respectively, a water return opening sealing head is installed on the flange end cover at the tail end of the simulation drilling pipe, and the water return opening sealing head is connected with the water storage tank through a water return valve to return water. An energy storage pressure stabilizer is further arranged between the water storage tank and one end of each water supply valve. A sound wave sensing armored optical cable is coaxially installed in the simulation drilling pipe. Various geological and hydrological conditions in an actual underground rock stratum environment can be effectively simulated, the exploration precision of a water-rich layer section is improved by analyzing the change rule of sound wave signals, and reliable technical support is provided for coal mine water disaster prevention and control and safe production.

The utility model provides a PCW system integrated water return valve group device for semiconductor production, which comprises a pipe joint, a movable joint A, a stop valve, a detection device, a flow meter and a movable joint D. The pipe joint is in threaded connection with the movable joint A through a joint nut A. The other end of the movable joint A is connected with the stop valve, the other end of the stop valve is connected with the detection device, and the flow meter is connected with the detection device. The other end of the detection device is connected with a movable joint B, the movable joint B is connected with a movable joint C I through a joint nut B, the other end of the movable joint C I is in threaded connection with a flowmeter, the other end of the flowmeter is in threaded connection with a movable joint C II, and the other end of the movable joint C II is in threaded connection with a movable joint D through a joint nut C. By means of the integrated modular design, installation is rapid and convenient, the construction period is shortened, the fool-proof effect is good, all assemblies are connected in a threaded welding mode, pipeline combination points are reduced, and the hidden danger of pipeline leakage is greatly reduced.

The invention discloses a miniaturized high-flow high-pressure high-dew-point saturated gas generating device which comprises a mass flow controller, a first pressure controller, a pre-saturator, a gas inlet pipeline, a saturator, a second pressure controller, a water inlet valve, a water return valve, a constant-temperature water tank and a circulating water path, the mass flow controller controls the flow of input unsaturated gas and is connected with the pre-saturator through the first pressure controller, the pre-saturator is used for generating supersaturated moisture, the saturator is connected with the pre-saturator through a gas inlet pipeline, the supersaturated moisture generated by the pre-saturator is condensed, saturated moisture is output, and the saturated moisture is stored in the pre-saturator. The second pressure controller is connected with the saturator, the air outlet pressure of the saturator is controlled by controlling the outlet pressure, the constant-temperature water tank generates circulating water with constant and adjustable temperature, and the circulating water path conveys the circulating water generated by the constant-temperature water tank to the saturator to provide a constant-temperature environment for the saturator. High-flow, high-pressure, high-dew-point and high-stability saturated moisture generation can be realized.

The utility model relates to U type water seal technical field, concretely is a kind of anti-freezing U type water seal structure, the utility model discloses to solve the problem that many defects exist in current U type water seal, therefore provides a new anti-freezing U type water seal structure, including U type water seal body, water supply pipeline, return water pipeline, U type overflow water seal and vertically arranged water replenishing pipeline, return water pipeline, water supply pipeline, water inlet, the upper pipe mouth of water replenishing pipeline is connected by four-way joint, return water valve is equipped on return water pipeline, water replenishing valve is equipped on water replenishing pipeline, the lower pipe mouth of water replenishing pipeline, overflow pipe mouth, U type overflow water seal is connected by three-way joint, the bottom of U type overflow water seal is equipped with overflow drain pipe mouth, overflow drain pipe mouth is equipped with overflow drain valve, and drain pipe mouth is also equipped with drain valve. The structure is simple, and manufacturing cost is low.

The utility model discloses a high-heat quick-heating pressure-resistant water heating blanket ground mat which comprises a ground mat body and a controller, a water inlet and a water outlet are formed in the positions, close to the left side and the right side, of the outer wall of the front end of the ground mat body respectively, and a water return valve is fixedly connected to the position, close to the lower side, of the outer wall of the front end of the controller. A water outlet valve is arranged on the right side of the water return valve, a parallel water path grid is arranged in the floor mat body, a traditional U-shaped tubular water path is improved into the existing parallel water path grid, when a small-area foreign matter presses the floor mat, the situation that water flow in the water path is blocked can be avoided, and the water flow can normally flow for heating; meanwhile, the parallel water path grids are better in heat dissipation effect and higher in speed when water flows through, the heat dissipation effect is three times that of a traditional water heating blanket, temperature rise can be accelerated, the whole ground mat can be more evenly filled with the heat dissipation effect, and a stable and good closed-loop water path is formed.

The utility model provides an oscillatory artificial rainfall simulation device which comprises a support frame, an oscillating device and an oscillating device, the output end of the linear driver is arranged in the length direction of the supporting frame; a transmission rod; the at least one group of connecting components are connected to the transmission rod; the spray head limiting blocks are fixed to the supporting frame and correspond to the moving pieces one to one, and a water return opening is further formed in one side of the bottom of each spray head limiting block; the rainfall spray head is inserted into the spray head limiting block and hinged to the spray head limiting block, and the rainfall spray head is hinged to the connecting assembly through a spray head fixing clamp; a water storage tank; a return water collecting pipe; a water return branch pipe; a water supply branch pipe; a water supply pump, a pressure gauge and a water pressure regulator; a water supply flow regulating valve; and a water return valve. According to the utility model, the rainfall spray head is driven by the linear driver to realize oscillatory swing so as to simulate rainfall.

An embodiment of the present invention discloses a system for confluence and parallel piping of a circulating loop between multiple buildings in a park and a control method thereof. The system includes a pipe network control unit and a common return pipe. Each building in the park is provided with a circulating partition, and the return water pipes of the circulating partitions are all connected to the common return pipe. A return water valve and a pressure gauge are arranged on the return water pipes of the circulating partitions before connecting to the common return pipe. The present invention avoids difficult hydraulic calculations and head loss estimations, but realizes an ideal flow balance result by monitoring and adjusting the actual process. The method is simple and efficient, has high engineering application value, and also shows good effectiveness and feasibility through engineering practice. The application of the present invention can also enhance the engineering feasibility and scheme flexibility of building a direct drinking water system for pipelines in a large office building park.