2354 results about "Circulating pump" patented technology

The invention relates to an ice crystal evaporator and an ice crystal water cooling device producing from the same, belonging to the technical field of refrigeration. The ice crystal evaporator is characterized in that a liquid inlet channel is formed by an evaporator tube, a liquid inlet and a liquid outlet in a tubular casing; and the outer channel of the evaporator tube of the tubular casing is divided into more than one S-shaped channel forming a water return channel through a water inlet of a water divider and a water outlet of a water collector. The ice crystal water cooling device is characterized in that the return air inlet of the ice crystal evaporator is communicated with a compressor, a condenser, a liquid feeding valve, a dry filter, a liquid feeding electromagnetic valve anda thermostatic expansion valve in sequence, and then is communicated with the liquid inlet of the ice crystal evaporator; a cooling water inlet / outlet of the condenser is connected with a cooling tower in series; and a water inlet / outlet of the ice crystal evaporator is communicated with a water circulating pump and an ice crystal energy storage tank in series. The invention has the advantages ofhigh cooling efficiency, no icing and low cooling temperature and is suitable for production of energy storage central air-conditioning, marine fishing, seafood processing, fruit, vegetable or meat processing, and the like; the cooled medium is municipal water.

The utility model discloses reaction equipment with high crude methyl ester yield, which comprises a stirring kettle and a material circulating system, the material circulating system comprises a circulating pump, a spray pipe arranged in the stirring kettle and a mixing nozzle arranged on the spray pipe, and a bottom outlet of the stirring kettle is connected with a feed port of the circulating pump through a first pipeline. An outlet of the circulating pump is connected with the spray pipe through a second pipeline; the mixing nozzle comprises a first sprayer and a second sprayer, and an outer flaring in the lower portion of the second sprayer is in clearance fit with the conical head through a connecting piece. The material circulating system can realize bottom-out and top-in of materials, so that the mixing of an oil phase and an enzyme water phase is promoted through the reciprocating circulation. In addition, the material circulating system is provided with a plurality of mixing nozzles, the flow speed of spraying of the first spray head is large, so that a negative pressure suction gap is formed at the joint of the second spray head and the first spray head, materials in the stirring kettle can enter the mixing nozzles under the action of negative pressure, an oil phase and an enzyme water phase are intensively mixed, and the yield of fatty acid methyl ester is improved.

The invention relates to a liquid air energy storage and terrestrial heat coordinated underground space air regulation and control system and method. Comprising a first-stage compressor, a second-stage compressor, a third-stage compressor, an expansion refrigerator, a first-stage compression heat exchanger, a second-stage compression heat exchanger, a third-stage compression heat exchanger, a cold box, a separator, a liquid air storage tank, a cryogenic pump, an evaporator, a cold storage circulating pump, a cold storage box, a compression heat exchange circulating pump, a compression heat storage box, a first heater, a second heater and a third heater. The system comprises a first air expander, a second air expander, a third air expander and a generator. The regeneration heater is used for guiding the compression heat generated by the compressor into the regeneration heater for regeneration and / or guiding the geothermal energy output by the geothermal energy output end into the regeneration heater for regeneration; the rotary wheel dehumidification device is used for performing cryogenic drying on the wet air; the fresh air processing unit is composed of a fresh air filter, a regeneration fan, a regeneration filter and an air supply fan.

The invention relates to the technical field of aircrafts, in particular to a turbine engine pre-cooling system and an aircraft. The turbine engine precooling system comprises a propulsion channel, a precooler, an air turbine, a radiator, a circulating pump and an engine. The precooler is located on the side, close to the air inlet, of the engine. The precooler is provided with a first heat exchange medium channel and an air channel; the radiator is arranged on the outer side of the propelling channel and provided with a second heat exchange medium channel and a fuel channel, and the second heat exchange medium channel communicates with the first heat exchange medium channel; the air turbine is arranged in a hollow channel in the center of the precooler, and the air inlet direction of the air turbine is parallel to the extending direction of the air channel. The circulating pump is arranged on the radiator and connected with the air turbine so as to drive the heat exchange medium to circularly flow between the first heat exchange medium channel and the second heat exchange medium channel; and a valve is arranged at an exhaust port of the air turbine, so that the heat exchange efficiency and the working condition adaptability are improved.

The invention relates to the technical field of design of an air suction prevention scheme for a hydraulic rocker gear oil cooling circulating pump of a coal mining machine, in particular to an air suction prevention method for the hydraulic rocker gear oil cooling circulating pump of the coal mining machine and the coal mining machine. Aiming at the problem of air suction damage of a circulating pump caused by change of the inclination angle of the rocker arm, oil suction ports are formed in the lowest liquid level positions of the positive and negative inclination angles of the rocker arm respectively, the inclination angles are monitored in real time through an angle sensor, and an electric control box controls an electric proportional reversing valve to act according to inclination angle signals and drives a hydraulic control reversing valve to be switched to a corresponding working position. And the gear oil circulating pump is always communicated with the current lowest liquid level oil suction port. According to the scheme, the pumping air corrosion risk is thoroughly eliminated, the service life of the pump body and the gear set is prolonged, and meanwhile system energy consumption is reduced. According to the preferable scheme, the filter and the cooler are integrated to form a closed-loop purification cooling loop, and the cleanliness and the thermal stability of the oil are further guaranteed. According to the invention, the adaptability defect of the fixed oil suction port under the dynamic dip angle working condition is overcome, and reliable guarantee is provided for high-load continuous operation of the coal mining machine.

The invention relates to an aero-engine, a thermal management method, a thermal management system and a computer readable medium. The thermal management method comprises the steps that it is judged that the aero-engine is in a first working condition, a second working condition, a third working condition or a fourth working condition; if in the first working condition, the three-way valve adjusts fuel oil to only enter the combustion chamber, the air-liquid heat exchanger and the air-fuel heat exchanger do not work, and the hybrid liquid cooling circulation system passes through the battery, the controller, the motor and the synovial fluid heat exchanger, then is cooled through the fuel liquid heat exchanger and then returns to the circulating pump; if in the second working condition, the fuel liquid heat exchanger, the air-liquid heat exchanger and the air-fuel heat exchanger all work; if in a third working condition, the fuel liquid heat exchanger and the air-fuel heat exchanger do not work; and if in a fourth working condition, the hybrid liquid cooling circulation system can realize internal heat balance, the hybrid cooling liquid directly returns to the circulation pump after absorbing heat through the controller, the motor and the synovial fluid heat exchanger, and then the battery is heated, so that the whole circulation is completed.

The utility model relates to the technical field of oil cooling motor structures capable of rapidly reducing oil temperature, and discloses an oil cooling motor structure capable of rapidly reducing oil temperature, which comprises a bottom plate and a motor main body, a rapid oil temperature reducing assembly is arranged at the top of the bottom plate, and the rapid oil temperature reducing assembly comprises an oil pump, a circulating pump, a fan frame and radiating fins. The oil pump is connected with an oil tank through an input pipe, the oil pump is connected with a cooling oil disc through an output pipe, and through the arrangement of the rapid oil temperature reducing assembly, a worker starts the oil pump, pumps cooling oil from the oil tank and injects the cooling oil into the cooling oil disc, the cooling oil disc is attached to the outer wall of the motor body, operation heat is absorbed, the motor is prevented from being overheated, and stable operation is guaranteed; the circulating pump pumps out hot oil from the cooling oil tray and feeds the hot oil into the heat dissipation pipe, the heat dissipation fins on the heat dissipation pipe increase the heat dissipation area and cooperate with the fan in the fan frame to accelerate heat dissipation, the cooled oil returns to the oil tank through the return pipe, efficient circulation of the cooling oil is achieved, and the motor is continuously cooled.

The invention discloses a vibration plate type anti-scaling MVR evaporator, and relates to the technical field of MVR evaporators. Comprising a compressor, a heater, a separator, a circulating pump and a heat exchanger which are connected with one another, the side end face of the heat exchanger fixedly communicates with a cold side inlet pipe and a hot side inlet pipe, the cold side inlet pipe is located on one side of the hot side inlet pipe, and an L-shaped fixed plate is fixedly installed on the side end face of the heat exchanger and located on the outer side of the cold side inlet pipe; an intercepting assembly is arranged on the L-shaped fixed plate; a mounting fixed plate and a stabilizing transverse plate are fixedly mounted on the heat exchanger, an auxiliary assembly is arranged on the mounting fixed plate and the stabilizing transverse plate, and a vibration transmission plate is arranged on the auxiliary assembly. Through cooperative use of the interception assembly and the auxiliary assembly, the anti-scaling capacity of the MVR evaporator is effectively improved, the heat exchange efficiency is improved, the service life of equipment is prolonged, energy consumption is reduced, and the use effect of the MVR evaporator is greatly improved.

The invention discloses a data center negative pressure two-phase liquid cooling distribution method and device, and relates to the technical field of data center liquid cooling. A server cold plate, an outdoor closed cooling tower and a data center two-phase cooling distribution unit CDU are connected through a closed circulating pipeline, so that a liquid cooling working medium is conveyed to the server cold plate through a liquid separator at an outlet of the CDU, absorbs heat of a server in a cold plate flow channel and is completely gasified, and the gasified cooling working medium is driven by a circulating pump through a heat insulation pneumatic pipeline to be conveyed to the server cold plate. A gaseous cooling working medium enters a primary side composite gas phase pipeline and is directly conveyed to a condensation section of a primary side outdoor closed type cooling tower, the condensation section adopts a finned tube bundle structure, the gaseous cooling working medium exchanges heat with air / spray water in the condensation section and is liquefied, and the liquefied cooling working medium enters a negative pressure heat exchanger unit in the CDU under the assistance of a circulating pump or gravity; a low-temperature gaseous cooling working medium after heat exchange enters a composite gas phase pipeline on the primary side under the action of a sucking pump and is mixed with a high-temperature gaseous cooling working medium coming out of a server cold plate, and then the precooled working medium forms a liquid working medium in a supercooled state through a throttling valve and is injected into a liquid pool at the bottom of a liquid storage tank; and redistributing to each server cold plate to finish cooling circulation.

The invention relates to the technical field of high-efficiency recovery of low-temperature exhaust gas, in particular to a high-temperature cooking waste heat recovery system for white spirit brewing. The white spirit brewing high-temperature cooking waste heat recovery system comprises a cooking barrel, a compressor, an embedded plate heat exchanger, a condensate water tank and a circulating pump, a liquid inlet of the cooking barrel is communicated with one end of a water supplementing pipe, an air inlet of the compressor is communicated with a waste gas outlet of the cooking barrel, and the compressor is used for compressing steam to obtain high-temperature and high-pressure steam. A steam inlet of the embedded plate heat exchanger is communicated with an air outlet of the compressor, and a steam outlet of the embedded plate heat exchanger is communicated with a steam inlet of the cooking barrel through a steam conveying pipe. By adopting the arrangement mode, waste heat steam is utilized twice to recover heat, high-efficiency energy utilization can be realized, energy consumption and carbon emission are reduced, and meanwhile, the cooking efficiency and the grain quality are improved.

A cooling system for an electric traction machine includes a looped conduit system for conducting a first cooling liquid and a circulation pump for conveying the first cooling liquid in a first circulation direction. The cooling system includes an expansion tank filled at least partially with the first cooling liquid and a gas, and a motor input terminal for fluidically connecting the looped conduit system on an input side to the electric traction machine. The cooling system includes a motor output terminal for fluidically connecting the looped conduit system on an output side to the electric traction machine and a first heat exchanger for dissipating heat from and / or supplying heat to the first cooling liquid. In the first circulation direction, the first heat exchanger is arranged downstream of the electric traction machine and connected via the motor input and output terminal and upstream of the expansion tank.

The invention relates to the technical field of ultra-high-speed motor design, fluid mechanical engineering and electromagnetic-structure coupling, in particular to an innovative structure-electromagnetic coupling design of a centrifugal hydrogen circulating pump driven by an ultra-high-speed permanent magnet motor. The integrated coupling rotor system is formed by rigidly connecting a permanent magnet motor rotor and a centrifugal impeller through conical surface interference and key groove positioning, a rotor iron core is formed by laminating 0.2 mm ultrathin silicon steel sheets (35W250), and impeller blade molded lines are optimized based on electromagnetic force harmonic characteristics (the number of blades is equal to the number of motor poles + / -1); the coupling matching degree is remarkably improved: through structure-electromagnetic parameter collaborative optimization, the comprehensive efficiency of the system reaches 85% or above, and is improved by 12%-15% compared with that of a separation design; an anti-resonance damping module is combined with a frequency avoidance design, and the vibration acceleration in an ultra-high-speed interval is smaller than or equal to 8 g and is reduced by 60% or above compared with a traditional design; the torque-load matching time is less than or equal to 0.3 s when the flow is suddenly changed, overcurrent impact or surge is avoided, and the dynamic requirement of a fuel cell system is met.

A reverse osmosis system includes a pressure vessel comprising first and second ports. Membranes disposed in the pressure vessel, permeate water and block permeation of dissolved solids from concentrate flowing between the first and second ports. A high pressure pump includes an inlet and an outlet. A circulation pump includes an inlet and an outlet and is configured to circulate the concentrate between the first and second ports. A valved circulation apparatus is configured to select between a forward flow mode and a discharge mode of the system. In the forward flow mode, the circulation pump inlet is connected to the second port and the circulation pump outlet is connected to the first port. In the discharge mode, the circulation pump inlet is connected to the high pressure pump inlet and the circulation pump outlet is connected to the first port and production of permeate is prevented.

The embodiment of the invention provides a flywheel direct-driven cogeneration unit dynamic adjusting system and a control method thereof, in the embodiment of the invention, a magnetic suspension technology is adopted to eliminate friction of a traditional mechanical bearing, and quick starting and stopping of the rotating speed of a flywheel are realized; the high-temperature superconducting magnetic clutch achieves instantaneous mechanical coupling / decoupling of the flywheel and the circulating pump through the zero resistance characteristic, and the response time is short. The frequency modulation requirement of a new energy power grid can be matched, and meanwhile hard constraint of thermal load fluctuation on electric energy output is avoided. The mechanical direct-drive path directly utilizes the kinetic energy of the flywheel to drive the circulating pump, so that a multi-stage energy conversion link in a traditional mode is omitted; the electric adjusting path realizes bidirectional power exchange between the flywheel and a power grid through an energy interface device, and the loss of an inverter is reduced; and the high-temperature superconducting magnetic clutch realizes zero-energy-loss transmission in a coupling state. The magnetic suspension flywheel set adopts a non-contact suspension technology, so that mechanical wear is eliminated; the high-temperature superconducting magnetic clutch achieves non-contact transmission through magnetic coupling, and friction loss is avoided.

The invention relates to the technical field of food industrial processing and intelligent processing, in particular to an intelligent temperature control system and method for circulating heating of frying oil, and the method comprises the following steps: a sensing acquisition module acquires an oil temperature analog signal and pipeline oil pressure change to generate a multi-dimensional data set; the prediction decision module generates a preliminary control instruction; the collaborative optimization module adopts a multi-target particle swarm optimization algorithm to adjust the heating power of a proportional burner, the rotating speed of a circulating pump motor and the opening degree of an electric flow control valve by taking temperature stability, energy consumption minimization and oil product protection as optimization targets; the adaptive learning module constructs a digital twinborn model, simulates oil flow thermodynamic behaviors through finite element analysis, and adopts a genetic algorithm to perform global parameter optimization. The problem that the oil temperature fluctuates greatly due to an on-off type temperature control strategy is solved, accurate and stable control over the oil temperature in continuous industrial production is achieved, and the quality consistency and the food safety of fried food are improved.

The invention belongs to the technical field of heat pump rectification, and particularly relates to a double-effect heat pump rectification system which comprises a first-effect rectification tower feeding pump connected with a preheater, the preheater is connected with a first-effect rectification tower, the first-effect rectification tower is connected with a gas-liquid separator through a screw compressor, and the gas-liquid separator is connected with a tail gas condenser through a second-effect falling film reboiler. The second-effect falling film reboiler is connected with a first-effect reflux discharge pump through a first-effect reflux tank, and the first-effect reflux discharge pump is connected with the preheater; the first-effect rectifying tower is respectively connected with a first-effect falling film reboiler and a first-effect falling film circulating pump; the first-effect rectifying tower is connected with a second-effect rectifying tower through a first-effect tower kettle discharging pump; the first-effect falling film reboiler is connected with a second-effect reflux discharge pump through a second-effect reflux tank; the second-effect falling film reboiler is connected with a second-effect falling film circulating pump and a second-effect rectifying tower, the second-effect falling film reboiler is connected with a second-effect rectifying tower kettle discharging pump through the second-effect rectifying tower, and the second-effect rectifying tower is connected with the first-effect falling film reboiler. According to the invention, double-effect rectification and heat pump rectification are successfully combined, and the cost is low.

The utility model relates to an ammonium phosphate evaporation and concentration system and belongs to the field of chemical engineering. The system comprises a concentrated ammonium phosphate pump, a concentrated ammonium phosphate storage tank, an I-effect evaporation chamber, an I-effect heater, an I-effect circulating pump, an I-effect charging pump, an II-effect evaporation chamber, an II-effect heater, an II-effect circulating pump, an II-effect charging pump, an III-effect evaporation chamber, an III-effect heater and an III-effect circulating pump. By adopting the system and the method, low-pressure saturated live steam is utilized to indirectly heat dilute ammonium phosphate to generate secondary steam and tertiary steam to continuously heat the dilute ammonium phosphate to produce concentrated ammonium phosphate. Compared with a two-effect evaporation concentration process flow which is widely used at present, the three-effect countercurrent evaporation concentration process flow saves energy by 47%. The utility model aims at saving energy, reducing consumption, reducing carbon emission of a production device and protecting the environment.

The utility model relates to the technical field of coal chemical industry, in particular to a device for simulating scaling stability in a coal-oil slurry transportation process. Comprising a coal-oil slurry stirring tank connected with a high-pressure hydrogen pipe, the coal-oil slurry stirring tank is connected with one end of a simulation conveying pipe through a feeding pipe, the other end of the simulation conveying pipe is connected with a coal-oil slurry buffer tank through a discharging pipe, the coal-oil slurry buffer tank is connected with the coal-oil slurry stirring tank through a circulating pipe, and a coal-oil slurry circulating pump is arranged on the circulating pipe; an oil-coal-slurry conveying pump is arranged on the feeding pipe, the feeding pipe is connected with a plurality of feeding branch pipes, each feeding branch pipe is provided with a branch pipe valve and a branch pipe flowmeter, the discharging pipe is connected with a plurality of discharging branch pipes, and the two ends of a plurality of simulation conveying pipes with different inner diameters are connected with the feeding pipe and the discharging pipe through the feeding branch pipes and the discharging branch pipes respectively. A plurality of pressure gauges are arranged on the simulation conveying pipe at intervals, and a heat tracing sleeve is arranged outside the simulation conveying pipe. The device is reasonable in structural arrangement, and is favorable for mastering the scaling risk of the coal-oil slurry in advance in the production process so as to carry out response treatment in time.

The invention discloses a heat exchange system applied to fused salt energy storage and heat supply and an operation method of the heat exchange system, and particularly relates to the field of fused salt energy storage and heat supply. S2, starting of a high-temperature loop is completed through starting of a thermal medium loop, starting of a circulating pump, flow adjustment and pressure correction of a buffer tank; s3, starting the molten salt loop and controlling the temperature, regulating the opening degree based on a formula to stabilize the flow of the high-temperature loop, synchronously controlling the total flow of the circulating pump, and judging that the loop is started when the flow, molten salt outlet temperature and pump pressure stable conditions are met; an intermediate medium of the heat exchange system is in a liquid state and is driven by the circulating pump, and operation reliability and economical efficiency are higher than those of a gaseous medium; the heat exchange system can be suitable for heat exchange with the temperature difference larger than 500 DEG C, and heat stress safety and medium safety of the heat exchanger can be guaranteed; the investment cost of the pump is reduced by reducing the design temperature of the circulating pump.

The invention relates to the technical field of fluid machinery intelligent control, and discloses a centrifugal circulating pump non-differential pressure sensor variable pressure control method based on edge intelligence. Water pump rotating speed and power signals are collected, subjected to normalization processing and then input to a lightweight recurrent neural network (RNN) model deployed at an edge device end; the RNN model serves as a soft sensor, and the flow and the lift value of the most unfavorable point of the pipe network are deduced in real time; and the system dynamically calculates the target lift based on a pipe network characteristic curve according to the reasoned flow, the target lift serves as a set value and forms a closed-loop control loop with the actual lift fed back by the RNN, the rotating speed adjustment amount is output to the frequency converter through a PID algorithm, and finally accurate variable pressure control without the physical differential pressure sensor is achieved. According to the method, the dependence on a tail end physical sensor is eliminated, the cost and the complexity are reduced, meanwhile, the real-time control and the data security of ultra-low delay are realized by utilizing edge calculation, and the response speed, the control precision and the energy-saving effect of the system are effectively improved.

The invention relates to the technical field of hydrogen energy preparation and process control, and discloses a fuzzy PID (Proportion Integration Differentiation)-based pressure control method for an alkaline electrolytic water hydrogen production system, which comprises the following steps of: firstly, acquiring current, pressure and separator liquid level data of the system in real time, and calculating a source-load gradient synergistic factor for representing the hysteresis degree of source end disturbance and load end response according to the current, pressure and separator liquid level data; and then pump valve heterogeneous cooperative control is executed, the rotating speed of a circulating pump is actively adjusted through the factor so as to change the flow speed of electrolyte, and feed-forward regulation and control of the gas holdup are achieved. Meanwhile, a gas phase rigidity coefficient is solved according to liquid level changes, a virtual damping domain is constructed, and PID integral and differential parameters are corrected in a self-adaptive mode; and finally, asymmetric variable universe fuzzy reasoning is executed, a hydrogen side universe is compressed through a source load gradient, an oxygen side driven dead zone threshold value is dynamically set, and a double-side valve instruction is output. According to the method, the problems of pressure lag and rigidity time varying under wide power fluctuation are effectively solved through flow velocity auxiliary adjustment and rigidity self-adaption strategies, and efficient and stable operation of the system is achieved.

The invention discloses a regenerative cryogenic helium circulating refrigerating system which comprises a vacuum cold box (1), a circulating fan (2), a valve box (3) and a low-temperature vacuum hose (4), the circulating fan is connected with the valve box through a pipeline, the vacuum cold box is connected with the valve box through a connecting pipe, a cold box flange (11) is arranged at the top of the vacuum cold box, and the low-temperature vacuum hose (4) is arranged in the cold box flange. One end of the low-temperature vacuum hose is arranged on the cold box flange and penetrates into the cold box cavity, the other end of the low-temperature vacuum hose is connected with the user load, at least one refrigerating machine is arranged on the flange, the circulating fan is used for pumping helium into the valve box in a circulating mode, and after the helium is cooled through the vacuum cold box, the user load is cooled through the low-temperature vacuum hose. According to the system, cold energy regenerative heat recycling during air returning can be achieved, the heat exchange efficiency of the system can be remarkably improved through the innovative design of the coil pipe type heat exchanger and the cold head heat exchanger, low-temperature refrigeration with the minimum of 10K can be achieved under the condition that no external cold source such as liquid nitrogen exists, and a solution is provided for the frontier fields such as nuclear fusion and the superconducting technology.

The invention discloses a heavy metal ion wastewater treatment device in construction wastewater, and belongs to the field of wastewater treatment. Comprising a filtering and purifying mechanism, and an agent adding mechanism is arranged on the left side of the filtering and purifying mechanism; a driving mechanism is arranged above the filtering and purifying mechanism; the filtering and purifying mechanism comprises a box body, and the top of the box body is fixedly connected with a circulating pump; the medicament adding mechanism comprises a hollow cylinder, the top of the hollow cylinder fixedly communicates with the bottom end of the input end of the circulating pump, and the inner side of the hollow cylinder is rotationally connected with water wheel blades through a rotating shaft; according to the device, through the synergistic effect of an arc-shaped flow deflector, an inverted V-shaped flow guide strip and a flow guide plate in the filtering and purifying mechanism, multi-stage flow guide dispersion of building wastewater is realized, the wastewater and impurities such as suspended solids, silt and concrete residues in the wastewater are prevented from intensively impacting a filter screen, and meanwhile, the impurities above the filter screen can be directly disturbed by reciprocating swing of the flow guide plate; the filter screen is prevented from being blocked by impurity accumulation.

The invention provides an assembly type ring main unit foundation which comprises a foundation body poured through concrete, a hollow heat dissipation opening is formed in the middle of the foundation body, a hollow disc body is arranged at the lower end of the foundation body, an S-shaped flow guide channel distributed in an S shape is arranged in the hollow disc body, and a plurality of heat conduction fins are arranged on the lower side of the hollow disc body. A heat dissipation flow guide pipe and a backflow flow guide pipe are arranged in the hollowed-out heat dissipation opening, one end of the heat dissipation flow guide pipe is downwards communicated with the inlet end of the snake-shaped flow guide channel, one end of the backflow flow guide pipe is downwards communicated with the outlet end of the snake-shaped flow guide channel, a circulating pump is arranged in the box butt joint frame, and the free end of the heat dissipation flow guide pipe is communicated with the outlet end of the circulating pump. The free end of the backflow flow guide pipe communicates with the inlet end of the circulating pump, and an assembly type distribution box is installed at the upper end of the foundation body. On the premise of ensuring sufficient heat dissipation in the distribution box, the distribution box is sealed, and moisture, dust and the like are prevented from entering the distribution box to threaten safe and stable operation of a distribution network.

The invention relates to the technical field of desulfurization circulating pump diagnosis, and discloses a desulfurization circulating pump health state diagnosis method based on vibration signals, which comprises the following steps: arranging vibration sensors on a pump body bearing seat, a motor bearing seat and a pump shell of a desulfurization circulating pump, and collecting operation vibration signals in real time; preprocessing the vibration signal, and extracting a time domain feature, a frequency domain feature and a time-frequency domain feature; constructing a health state evaluation model based on a deep belief network, performing nonlinear mapping on the time domain features, the frequency domain features and the time-frequency domain features, and outputting health indexes; comparing the health index with a health grading threshold value, and dividing health grades; and when the state is a sub-health state or a fault state, matching a fault feature library by using an Euclidean distance, identifying a fault type and generating a maintenance suggestion. According to the method, the sensing capability of local faults and early-stage tiny damage is improved, the fault positioning time is shortened, and the non-planned shutdown frequency is reduced.

The utility model relates to the technical field of centrifugal pump production, in particular to a pump cover punching tool of a high-lift circulating pump, which mainly comprises an inner clamping component, a water inlet hole punch forming component and a mounting hole punch forming component. The mounting hole punch forming assembly is used for punching a mounting hole in a mounting convex plate of a pump cover blank, the inner clamping assembly is used for providing inner clamping support for the pump cover blank, and bearing pressure is provided in the water inlet hole punch forming and mounting hole punch forming processes, in this way, the cover body deformation condition can be avoided in the punching machining process, and the service life of the pump cover blank is prolonged. And the requirement of punching the lateral water inlet hole and the axial mounting hole at the same time is met.

The invention discloses a device and method for preparing special isocyanate, the device comprises a synthesis device and a separation device, the synthesis device comprises a batching tank, a synthesis reaction kettle, a discharge filter, a discharge circulating pump, a sampler, a flash tank and a crude product conveying pump which are communicated in sequence, and an axial-flow stirrer and a parabolic stirrer are arranged in the synthesis reaction kettle; a catalyst basket is detachably and vertically fixed on the inner side wall of the synthesis reaction kettle; the separation device comprises a negative pressure separation tower, a tower top cooler, a gas-liquid bag, a condensate collecting tank and a tower top reflux pump which are sequentially communicated, and is also provided with a vacuum pump, a tower kettle circulating pump and a product conveying pipeline. The device and the preparation method have the beneficial effects of high synthesis reaction speed, simple and controllable production process, good crude product separation effect and low equipment energy consumption.

The utility model relates to a water heating control device for a poultry breeding house, which is characterized in that a group of water heating radiators and a fan heater matched with the water heating radiators are connected between a drain pipe (3) and a water return pipe (4), a water tank water temperature detection probe is arranged at a water outlet of a water tank, and an inlet water temperature detection probe and an outlet water temperature detection probe are arranged at a water inlet and a water outlet of each radiator. A group of air temperature detection probes corresponding to the heat supply areas of the radiators are arranged in the poultry breeding house; a controller MCU is arranged, all the temperature probes are connected with the controller MCU through an RS485 bus, the collected measured values of all the temperature probes are transmitted to the controller MCU, the controller MCU operates a control program to send out an instruction, and corresponding switching devices are driven through connected driving circuits to control the warm air blower and the circulating pump to be started or stopped. The utility model has the advantages and effects that the warm air blower is ensured not to blow cold air to chicken bodies, the phenomenon of alternate blowing of cold air and warm air can be effectively prevented, and chicken flocks are prevented from getting ill due to cold air blowing.

The utility model discloses a novel hydraulic control system of household garbage dry-wet classification equipment, and belongs to the field of hydraulic control. The hydraulic control system comprises a large variable pump connected and driven by a first motor, a small variable pump connected and driven by a second motor, a duplex vane pump connected and driven by a third motor, a cooling circulating pump connected and driven by a fourth motor, a pressure control valve group, an extrusion roller feeding control valve group, a cooperative control valve group, an extrusion oil cylinder and a low-speed large-torque hydraulic motor; the device comprises a feeding oil cylinder, a door blocking oil cylinder, a door lifting oil cylinder, a push-pull box oil cylinder, a box locking oil cylinder, an oil return filter, a circulating filter, an air cooler and an oil tank. According to the utility model, the multifunctional control variable pump with constant power and remote constant-pressure control is adopted, so that the device is suitable for the extrusion working condition of household garbage dry-wet classification equipment, the working efficiency is higher, and small-load high speed and large-load low speed are easier to realize; and the system is more energy-saving and smaller in heat generation.

The invention discloses an energy-saving coal-fired unit desulfurization slurry circulating pump control method and system.The desulfurization slurry circulating pump comprises a pump machine, a feeding pipe communicated with the feeding end of the pump machine and a filter pipe detachably connected to the feeding pipe, and the control method comprises the steps that the pressure difference between the inlet end and the outlet end of the filter pipe in the current control period is obtained, meanwhile, the outlet flow value of the pump machine is obtained; calculating a first pressure difference threshold value corresponding to the blockage degree of the filter pipe based on the outlet flow value; comparing the pressure difference with a first pressure difference threshold; and if the pressure difference is larger than a first pressure difference threshold value, it is judged that the filter pipe is blocked, a first early warning signal used for prompting maintenance is generated, the operation rotating speed of the pump machine in the next control period is increased, and the outlet flow value is adjusted to the preset flow interval in the next control period. By monitoring the pressure difference of the filter pipe and the flow of the pump in real time, the blockage state is dynamically judged, the rotating speed of the pump is automatically adjusted, the circulating flow of desulfurization slurry is guaranteed, and the maintainability and stability of a filter assembly are improved.