41 results about "Backwater valve" patented technology

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 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 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 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 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.

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 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.

The variable-amplitude sprinkling pipeline system comprises a power output system, a pump water inlet pipeline, a pump water outlet pipeline and a variable-amplitude water return pipeline, the power output system comprises a side power takeoff, one side of the side power takeoff is connected with a transmission shaft, and one side of the transmission shaft is connected with a sprinkling pump; the water outlet main pipe is communicated with a front spraying pipe, the front spraying pipe is further provided with a first valve driving device used for controlling the opening degree of the front spraying main valve, and one end of the front spraying pipe is communicated with a front spraying pipeline; the variable-amplitude water return pipeline comprises a return pipe connected with the water outlet main pipe, one side of the return pipe is communicated with a first return pipe, the first return pipe is provided with a first return valve and a variable-amplitude return valve, and the first return pipe is further provided with a second valve driving device for controlling the opening degree of the variable-amplitude return valve. Through the design of the variable-amplitude water return pipeline, flexible adjustment of the watering amount and the watering range is achieved, and the problems that when a traditional watering cart works on a narrow road, water resources are wasted, pedestrians are affected, and the working efficiency is reduced are solved.

The utility model relates to the technical field of water pumps, in particular to a self-priming pump which comprises a pump body, a water inlet and a water outlet are arranged on the pump body, a water inlet pipe is arranged in the pump body, one end of the water inlet pipe is communicated with the water inlet, and the other end of the water inlet pipe is used for being connected with an impeller. A communicating pipe is arranged on the upper portion of the water inlet pipe and enables the water inlet pipe to be communicated with the interior of the pump body, the impeller can introduce media into the pump body from the water inlet, a water return opening is formed in the bottom of the water inlet pipe and communicated with the interior of the pump body, and a water return valve used for opening and closing the water return opening is arranged at the water return opening. The design of the water return valve realizes the accurate control of the water return port, the water return valve can be closed as required to prevent the influence on the extraction flow, and the water return valve can also be opened during self-suction to assist the discharge of air, so that the self-suction efficiency is improved, and the reliability and flexibility of the whole system are improved.

A hot water preparation device comprises a hot water storage tank, an outlet of the hot water storage tank is connected with an inlet of a first discharging pump through a pipeline, an outlet of the first discharging pump is connected with an inlet of a first heating device through a pipeline, and an outlet of the first heating device is connected with an inlet of a first water return valve through a pipeline. A second temperature sensor and a first water consumption point are sequentially arranged on the pipeline between the first heating device and the first water return valve, and an outlet of the first water return valve is connected with an inlet of the hot water storage tank through a pipeline; an outlet of the hot water storage tank is connected with an inlet of a second discharging pump through a pipeline; and an outlet of the second discharging pump is connected with an inlet of a second heating device through a pipeline. According to the utility model, the plurality of heating pipelines and the plurality of temperature sensors are arranged, so that a plurality of different temperature requirements are met through one hot water storage tank, the occupied area is reduced, and the energy waste is reduced.

This utility model discloses a dual-temperature water outlet heat exchange station and heat exchange system for a centralized heat source, including an inlet valve, a return valve, a mixing valve, a water pump, a three-way valve, a heat exchanger, a heating inlet, a heating return outlet, a bathroom outlet, a bathroom inlet, a first medium inlet, and a first medium return outlet. The heat exchange station has heating and bathroom modes. In heating mode, the first medium inlet, inlet valve, mixing valve, and heating inlet are connected to form a first flow path for the first medium, and the heating return outlet, water pump, return valve, and first medium return outlet are connected to form a second flow path for the first medium. In bathroom mode, the first medium inlet, inlet valve, mixing valve, heat exchanger, water pump, return valve, and first medium return outlet are connected to form a third flow path for the first medium, and the bathroom inlet, heat exchanger, and bathroom outlet are connected to form a second medium flow path. The three-way valve allows the mixing valve to switch between the heating inlet and the heat exchanger. This utility model reduces the number of parts and pipes, has a simple structure, and low cost.

The utility model discloses a multifunctional gravel filter which comprises a bin body, a water inlet pipe is fixedly connected to the upper portion of the bin body, a water inlet valve is arranged on the right side of the water inlet pipe, a water return pipe is fixedly connected to the lower portion of the right side of the bin body, a water return valve is arranged on the upper portion of the water return pipe, and a water outlet pipe is fixedly connected to the bottom of the bin body. A water outlet valve is arranged on the right side of the water outlet pipe, a connecting pipe is fixedly connected to the lower portion of the water outlet pipe, and a sterilization device is arranged at the other end of the connecting pipe. The interior of the bin body is fixedly connected with a supporting plate, and the upper portion of the supporting plate is fixedly connected with a flow slowing pipe. By means of the structure, impurities in water can be filtered, organic matter and other substances still remaining in the water can be filtered and killed at the same time, water flow can stably enter the filter layers in the back-flushing process, the small-particle-size filter layer can be prevented from entering the large-particle-size filter layer, and back-flushing work is smoother.

The utility model discloses a railway vehicle water tank water tightness detection tool, and relates to the technical field of railway vehicles, the tool comprises a pressure maintaining mobile trolley, a test circulating water storage tank is arranged in the pressure maintaining mobile trolley, and the top surface of the test circulating water storage tank is communicated with a transparent backwater observation hose, a water feeding pipe and a water return pipe; a flange extension pipe is arranged in the circulating water storage tank for the test; an electric control cabinet, an electric low-flow pressure test pump, a PP cotton filter, a first stop valve, an electric control digital display precision pressure gauge, a signal loop and a water return valve are arranged in the pressurizing electrical module; a test water tank support frame; the electric low-flow pressure test pump, the PP cotton filter and the first stop valve are sequentially communicated through a communicating pipe, and the electric control digital display precision pressure gauge is communicated with the communicating pipe between the PP cotton filter and the first stop valve. The pressurizing device and the water tank are combined and matched with the auxiliary component, so that the water tightness pressure maintaining detection requirement of the water tank product on the railway vehicle is met.

The invention relates to the technical field of water heater zero cold water control, and discloses a water heater preheating control method and device, a controller and a water heater. The method is applied to the water heater and comprises the steps that a water pump of the water heater is controlled to be started in response to a preheating request of the water heater; the real-time circulating water flow of the water heater is detected; when the real-time circulating water flow is larger than the set starting flow, the water heater is controlled to ignite and heat; on the basis of the real-time circulating water flow, the opening and closing state of the temperature control water return valve is judged, and when the temperature control water return valve is in the opening state, an outer circulating pipeline of the water heater forms a passage. Therefore, when it is judged that the temperature control water return valve is in the closed state, the water pump is controlled to be closed, and heating is stopped. The water heater can timely recognize closing of the mechanical temperature control water return valve, timely stops operation of the water pump, and prevents the water pump from being damaged due to overheating.

The invention discloses a temperature control device for double-temperature switching independent control of high-temperature and low-temperature fluid, which comprises a heating medium interface, a refrigerant interface, a temperature control device and a client mold, and is characterized in that the temperature control device comprises an integrated waterway board, a cold water return valve pipeline mounting seat, a hot water return valve pipeline mounting seat, a hot water outlet valve pipeline mounting seat and a cold water outlet valve pipeline mounting seat; the heating medium interface is connected with the hot water outlet valve mounting seat and the hot water return valve mounting seat, the refrigerant interface is connected with the cold water outlet valve mounting seat and the cold water return valve mounting seat, a plurality of on-off control valves are mounted on each mounting seat, and the client mold is connected with the temperature control device. The cooling efficiency of the heating module can be improved, equipment temperature control is facilitated, and the dual requirements for heating and cooling of the injection charging barrel in one period are met; the use energy consumption of the equipment can be greatly optimized; the number of pipelines required for operation of equipment is greatly reduced, the early-stage investment cost is reduced, and the heat dissipating capacity of the pipelines is reduced.

This utility model discloses a heat exchange station and system for a hot water storage tank, including an inlet valve, a return valve, a three-way valve, a heat exchanger, a heating inlet, a heating return outlet, a bathroom outlet, a bathroom inlet, a first medium inlet, and a first medium return outlet. The heat exchange station has heating and bathroom modes. In heating mode, the first medium inlet, the inlet valve, and the heating inlet are connected to form a first flow path for the first medium, and the heating return outlet, the return valve, and the first medium return outlet are connected to form a second flow path for the first medium. In bathroom mode, the first medium inlet, the inlet valve, the heat exchanger, the return valve, and the first medium return outlet are connected to form a third flow path for the first medium, and the bathroom inlet, the heat exchanger, and the bathroom outlet are connected to form a flow path for the second medium. The three-way valve is located in either the first or second flow path, and allows switching between the inlet valve and the heating inlet / heat exchanger. This utility model reduces the number of parts and pipes, resulting in a small overall size, simple structure, and low cost.

The utility model discloses a fresh air all-in-one machine controller, which comprises a control panel, a manual operator and a wiring socket, and is characterized in that the control panel is fixedly arranged on the side surface of a fresh air all-in-one machine shell through a nylon isolation column; the manual operator is mounted on an external wall surface; the wiring socket is fixedly installed on the side face of the fresh air all-in-one machine shell. The wiring socket is connected to the control panel and the manual operator through signal lines. The control panel comprises a power interface and a plurality of functional interfaces; the plurality of functional interfaces comprise one or more or all of a germicidal lamp interface, a humidifying electromagnetic valve interface, a fresh air motor interface, a system water return valve interface, a reheating water return valve interface, an exhaust valve interface, an exhaust motor interface, a first temperature and humidity sensor interface, a second temperature and humidity sensor interface and a data transmission interface.

The application discloses a vertical filter press four-time countercurrent washing device and method, relates to the technical field of filter press, and comprises a vertical filter press, a hydraulic pump, a hydraulic station, a air-drying valve, a washing valve, a first pressure transmitter, a feeding valve, a back feeding valve, a feeding pump, a slurry tank, a second pressure transmitter, a cleaning valve, a extrusion valve, a pressure relief valve, a cleaning extrusion water pump, a cleaning extrusion water tank, a first liquid level transmitter, a first water supplement valve, an exhaust valve, a gas-liquid separation tank, a mother liquor valve, a mother liquor tank, a first washing backwater valve and a washing liquid collecting tank. When the filter cake is washed, the extrusion process can be inserted between the washing processes, and each process can be realized by setting corresponding parameters in the touch screen interface, so that the use is more flexible and convenient. The four-time countercurrent washing function can effectively control the water consumption, save resources and reduce the cost.

The utility model belongs to the technical field of air separation equipment, and relates to an energy-saving circulating pipeline for reducing power consumption of an oxygen production water pump house, which comprises a water tank, a cooling tower fan arranged in the water tank, a water outlet pipe led out of the bottom of the water tank and connected to water consumption equipment, a circulating water pump arranged at the front end of the water outlet pipe, and an electric outlet valve arranged on the rear side of the circulating water pump. The water using equipment is connected to the water pool through a water return pipe, and a water return valve is arranged at the tail end of the water return pipe. According to the utility model, the production cost of oxygen production is reduced, the operation is carried out under a proper lift, the burden of a water pump is reduced, the service life of equipment is prolonged, and the cost for maintaining and replacing the equipment is reduced.

The utility model provides a small backwater device with adjustable flow for a wire cut electric discharge machine, which comprises a backwater valve device box body, the top of the backwater valve device box body is fixedly connected with a support beam through a fixing screw, and the bottom of the backwater valve device box body is provided with a first cylinder; the bottom end of a piston rod of the first air cylinder is fixedly connected with a first connecting plate, the top of the first connecting plate is fixedly connected with a first locking nut, and the inner side wall of the first locking nut is in threaded connection with a first connecting piece. The first air cylinder drives the small water return valve and the first sealing plate to move, the small water return valve is opened or closed, the distance between the first sealing plate and the water return valve device box body is adjusted through the adjusting ejector rod, a drainage gap is changed, the water return flow when the small water return valve is opened is basically balanced with the water injection rate during large jet flow machining, and the machining efficiency is improved. The problem of insufficient liquid supply of the clear water tank caused by frequent liquid supply is avoided, and the influence on normal processing caused by continuous rising of the liquid level of the working liquid tank is prevented.

This invention discloses an automatic water circuit control system for the disassembly and assembly of target materials in vacuum coating equipment, comprising a cathode water circuit, a drainage water circuit, and a control circuit system. The cathode water circuit is equipped with an inlet valve and a return valve. The drainage water circuit is connected to the cathode water circuit and is equipped with a pressure relief valve. The control circuit system includes a main power supply and a cathode water circuit control circuit and a drainage water circuit control circuit connected in parallel to the main power supply. The cathode water circuit control circuit has a first normally open contact and a parallel valve control branch connected in series. The parallel valve control branch includes an inlet solenoid valve, a return solenoid valve, and a time-delay relay connected in parallel. The inlet solenoid valve drives the inlet valve, and the return solenoid valve drives the return valve. The drainage water circuit control circuit has a second normally open contact connected in series with the drainage solenoid valve, which drives the pressure relief valve. The output contact of the time-delay relay is connected to the second normally open contact. This system can automatically operate the inlet valve, return valve, and pressure relief valve on the cooling water circuit.

The invention provides a vacuum crystallization automatic control system, which belongs to the technical field of chemical automation control, and comprises a vacuum crystallization tank, a pre-crystallization titanium liquid tank and a spraying condensation tank, the vacuum crystallizing tank is connected with a vacuum crystallizing tank discharge valve and a spray condensing tank; a discharge valve of the vacuum crystallizing tank is connected with the post-crystallization storage tank; the top of the spray condensation tank is connected with one end of the non-pressure circulating water tank through a crystallization non-pressure water inlet valve, the bottom is connected with the other end of the non-pressure circulating water tank through a crystallization non-pressure water return valve, and the side surface of the top of the spray condensation tank is connected with the vacuum pump through a vacuum pump emptying valve. Automatic equipment is added, so that the labor intensity of workers is reduced, and the execution accuracy is improved; operation is easy and convenient, the automation degree is high, the safety coefficient is high, stability is good, automatic control over procedures is truly achieved, labor intensity is relieved, and production cost is reduced. The invention also relates to an automatic control method of the vacuum crystallization automatic control system.

1. Name of the designed product: water inlet valve (with double external thread backwater valve). 2. Use of the designed product: used for pipeline control connection. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view.

1. The name of the design product: double external thread backwater valve. 2. The use of the design product: for pipeline control connection. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

The utility model relates to the technical field of reaction kettle especially is a kind of suspension method polyvinyl chloride temperature control production device of varying, including reaction kettle, the top end fixedly connected of reaction kettle has feeding pump, the inboard fixedly connected of feeding pump has circulating water upper water valve pipe and circulating water backwater valve pipe, the lower end fixedly connected of reaction kettle has drive assembly, the inboard installation of drive assembly has stirring assembly, the inboard fixedly connected of reaction kettle right end has circulating water backwater pipeline system, the inboard fixedly connected of reaction kettle left end has circulating water upper water pipeline system, the lower end fixedly connected of reaction kettle has ionless water adding device and initiator adding device, the upper end fixedly connected of reaction kettle has polyethylene monomer adding device and terminator adding device, in the utility model, device can effectively improve production efficiency, reduce energy consumption and optimize product quality, provide more efficient, energy -conserving and environmental protection's solution for the production of polyvinyl chloride resin.

The present application relates to a kind of condenser circulating water secondary filter screen blocking prevention systems, including respectively being arranged in the water inlet end of condenser A, B side water supply branch pipe A, B side secondary filter screen, A side secondary filter screen A side blowdown pipe is connected with A side backwater branch pipe, and backwater valve water inlet end side;B side secondary filter screen B side blowdown pipe is connected with B side backwater branch pipe, and located on B side backwater branch pipe on backwater valve water inlet end side;The blowdown pipe of induced draft fan steam turbine condenser circulating water A, B side secondary filter screen is reformed, it is respectively connected to induced draft fan steam turbine condenser circulating water A, B side backwater valve before, so that the problem that induced draft fan steam turbine condenser circulating water A, B side secondary filter screen differential pressure high blowdown door is simultaneously opened can be effectively solved when mutual influence, the method has strong practicality and reliability.