30results about How to "Accurate flow adjustment" patented technology

The invention provides a wafer type orifice plate flow regulating valve, which is used for controlling the flow quantity of a high speed fluid medium, simultaneously can reduce vibration and noise, and can adjust accurately. The invention comprises a valve body, a fixed valve plate and a movable valve plate which mutually contact and match equipped in the valve body, a valve rod arranged on the movable valve, a controlling mechanism connected on the valve rod, a plurality of through holes arranged on the fixed valve plate, and a plurality of over current orifices being able to align the through holes and being arranged on the movable valve plate. The present invention has the advantages that the movable valve plate can be longitudinally moved through adjusting the controlling mechanism, thus the relative position of the movable valve plate and the fixed valve plate is further changed, the flow area is changed, and the parameters of the media flow and the pressure can be adjusted. Because the flow area firmly changes during the movable valve plate opening and closing process, the flow quantity can be accurately adjusted, and because the motion of the medium is straight line motion, the turbulent flow producing is avoided, thus the vibration of the pipe system is effectively reduced, the noise is reduced, and simultaneously the service life of the valve is prolonged.

The invention relates to a fan coil temperature control device based on the pipe diameter matching relation between a fan coil and a water pipe and controlled by the return air temperature and the air supply volume. The fan coil temperature control device comprises the fan coil, an electric water valve, a controller and a control panel. A draught fan is arranged in the fan coil. The fan coil temperature control device is characterized in that the electric water valve is installed at the water inlet end of the fan coil; the model of the fan coil is matched with the pipe diameter of the water pipe so that the maximum limitation of the opening degree of the electric water valve can be controlled; the controller controls the opening degree of the electric water valve to be adjusted within the opening degree limiting range; a fan coil temperature control structure for automatically regulating the opening degree of the electric water valve according to the pipe diameter matching relation between the fan coil and the water pipe is formed; the control panel comprises multiple control signal output ends and feedback signal input ends, and a structure for automatically regulating the rotating speed of the draught fan and the opening degree of the electric water valve according to the return air temperature and the air supply volume is formed; and the model of the fan coil is FC800, or the model of the fan coil is FC400. According to the fan coil temperature control device, the maximum limitation of the opening degree of the eclectic water valve is controlled by the controller according to the pipe diameter matching relation between the fan coil and the water pipe, and the beneficial effects that the flow of the water pipe of the fan coil is accurately regulated and the stability of a chilled water system is improved are achieved.

The invention discloses a direct-acting fine cooling electromagnetic injection valve used for cooling a cold rolling band plate roller, comprising an injection nozzle assembly, an injection beam, a valve plug, a valve body, an electromagnet assembly and cooling liquid, wherein the electromagnet assembly and the valve plug are installed to be combined into the valve body; a solenoid-type structure is adopted by the electromagnet assembly; the injection nozzle assembly comprises an injection nozzle body and an injection nozzle; the injection beam is a base which is organically connected together with a rolling mill; and the valve plug is made of heat-resistant and corrosion-resistant non-deformable imported sealing materials. In the invention, the electromagnetic valve is directly controlled by an online plate-shaped electrical signal, and the flow of the cooling liquid ejected from the ejection valve in the unit time is accurately regulated through regulating the pulse width of the electrical signal; the thermal convexity of the roller is regulated through sectionally cooling the roller, thereby accurately solving the problem of the thermal convexity of the online roller in different sections, ensuring the quality of the cold rolling band plate and improving the linear rolling speed of the rolling mill.

The invention discloses a diesel engine water pump control system. The diesel engine water pump control system comprises a state detecting module, a control module, a data transceiving module and an interface management module. The state detecting module is used for detecting the operation state of a diesel engine water pump and sending state data; the control module is used for controlling operation of the diesel engine water pump; the data transceiving module is used for transmitting the state data and transceiving a control order; the interface management module receives the state data, performs fault detection, displays the operation state and sends the control order to the control module. Compared with related technologies, the diesel engine water pump control system has the advantages of being timely in response, rapid in starting and capable of accurately adjusting flow of the diesel engine water pump and pipe network pressure and preventing the diesel engine water pump from being damaged. On the basis of the diesel engine water pump control system, the invention further provides a control method of the diesel engine water pump control system.

The invention discloses a variable-flow solid-liquid mixing engine, and belongs to the field of solid-liquid mixing engines. The variable-flow solid-liquid mixing engine comprises an oxidizing agent storage box, a thrust chamber, a control valve and an adjustable cavitation venturi tube, wherein the oxidizing agent storage box communicates with the thrust chamber through a pipeline and the adjustable cavitation venturi tube to input an oxidizing agent into the thrust chamber, the control valve installed on the pipeline controls on-off of the oxidizing agent, the adjustable cavitation venturi tube comprises a stepping motor, a fixed flange plate, a venturi tube pressing screw, a venturi tube inlet joint, an adjustable cavitation venturi tube shell, a cavitation venturi tube and a needle awl, the axial movement of the needle awl is controlled through the stepping motor, the gap between the needle awl and the throat diameter of the cavitation venturi tube is changed, and therefore, the flow of oxidizing agent supply is changed, and thrust adjustment is achieved. The adjustable cavitation venturi tube adopted by the variable-flow solid-liquid mixing engine can simply realize large-range flow regulation.

A process for polishing the monocrystal chip of indium phosphide is characterized by that the polishing liquid prepared from hydrogen peroxide and acidic pH regulator chosen from C3H6O3, CH3COOH and C6H8O7 is used for polishing under 0.25-0.65 kg/sq.cm. Its advantage is excellent mirror surface.

The invention provides an electro-hydraulic proportional control auxiliary system and engineering mechanical equipment. The electro-hydraulic proportional control auxiliary system comprises an engine,a gear pump, an electro-hydraulic reversing valve, a control module and a rotating motor. The engine is connected with the gear pump; and the gear pump is connected with the rotating motor to drive the rotating motor to rotate. The electro-hydraulic reversing valve is arranged between the gear pump and the rotating motor; the control module is connected with the electro-hydraulic reversing valve;the control module can control the openness of the electro-hydraulic reversing valve to adjust the flow of the rotating motor; and the flow of the rotating motor can be precisely controlled as neededto realize refined operation so as to prolong the service life of the rotating motor.

The invention relates to a device for adjusting the conveying flow of medicine liquid. The device comprises a shell, a rotary shaft, a plurality of cams, extruding blocks, a liquid inlet tube and a liquid outlet tube. The rotary shaft is rotationally arranged in the shell, the cams are coaxially and fixedly arranged on the rotary shaft, and the liquid inlet tube and the liquid outlet tube are arranged in the shell and communicated through a plurality of connecting tubes. Elastic tube segments made of elastic materials are arranged on the connecting tubes, the elastic tube segments of the connecting tubes are correspondingly arranged below the cams, and the extruding blocks are arranged between the elastic tube segments of the connecting tubes and the cams. The cams are rotated through the rotary shaft, the cams push the extruding blocks to vertically move, and then adjustment on closing, opening and flow of the connecting tubes is achieved. According to the technical scheme, the device has the advantages that the structure is simple, the inner diameter of flow limiting tube segments of the connecting tubes is only 0.05 mm to 0.07 mm, and the flow of the medicine liquid can be precisely adjusted by adjusting the number of the elastic tube segments, closed or opened by rotating the rotary shaft, of the connecting tubes.

The invention discloses a breathing device. The breathing device comprises an air tube, a control module and a proportional electromagnetic valve, wherein one end of the air tube is provided with a quick connector connected with a compressed air generating device, and the other end of the air tube is provided with an output port for conveying air flow to a patient; the control module is used for controlling the amount of the air flow passing through the air tube according to the set breathing frequency and/or breathing time; the proportional electromagnetic valve is arranged on the air tube and electrically connected with the control module; and the proportional electromagnetic valve can directly control the amount of the air flow passing through the air tube under the control of the control module. According to the breathing device, a smallest system only needs the air tube, the control module and the proportional electromagnetic valve, and the proportional electromagnetic valve can be controlled through the control module to convey the metered air flow to the patient so as to assist the patient in breathing; and in addition, more accurate control can be achieved by selectively adding a pressure sensor, a flow sensor and other components, so that the metering accuracy is improved. The breathing device is simple in configuration, the cost can be greatly reduced, the productionefficiency can be improved, and the increasingly serious epidemic requirement can be met.

The invention provides a movable decontamination foam generating device. The movable decontamination foam generating device comprises a shell, universal wheels, a control panel, a gas conveying unit,a liquid conveying unit and a foam conveying unit. According to the scheme, the movable decontamination foam generating device adopts an integrated design, and a pipeline and a control system are integrated in the shell, so that the installation, the operation and the maintenance are convenient; gas-liquid consumption can be precisely monitored in real time through an arranged gas flow meter and aliquid flow meter; a foam liquid conveying pump is a fluoroplastic centrifugal variable-frequency pump, is efficient and energy-saving, and can precisely adjust the flow.

The invention relates to the technical field of caffeine production equipment, especially to a control system for tail gas absorption in production process. The control system comprises: a first absorption tower and a second absorption tower; an absorption liquid supply unit, which is used for simultaneously supplying liquid ammonia to the first absorption tower and the second absorption tower soas to allow the liquid ammonia to enter the first absorption tower and the second absorption tower and to be respectively in reverse contact with tail gas of the first absorption tower and the secondabsorption tower; a liquid collection unit, which is used for collecting liquid ammonia after reactions of the tail gas in the first absorption tower and the second absorption tower; a detection unit,which is used for detecting the content of nitrogen oxides at the downstream process of the first absorption tower and the second absorption tower; a signal receiving unit; an identification unit; and execution units, which are used for receiving a first driving signal, a second driving signal and a third driving signal to drive the absorption liquid supply unit to supply the flow of liquid ammonia to the first absorption tower and the second absorption tower at the same moment so as to realize more accurate liquid ammonia consumption control.

The invention discloses a large-particle solder feeder. A charging barrel is mounted at the upper part of a shell, the nozzle of the charging barrel extends into the shell, and a conveying belt, a flow adjusting mechanism are arranged in the shell, a main material outlet and an auxiliary material outlet are formed in the bottom, a driving device is arranged on the outer side, a material chamber shell is arranged on the outer side of the bottom of the shell, a discharging hole, an auxiliary material chamber and an auxiliary material hole are formed in the material chamber shell, the discharginghole is communicated with the main material outlet, and the auxiliary material chamber is communicated with the auxiliary material outlet and the bottom auxiliary material hole. One end of the conveying belt is arranged below the nozzle, and the other end is arranged above the main material outlet and driven by the driving device. The flow control mechanism is arranged above the main material outlet and provided with two check blocks and a fixing block fixed in the shell, the check blocks are connected to one side of the fixing block side by side to form a U-shaped structure with an opening aligned with the end of the conveying belt, the gap of the U-shaped structure is aligned with the main material outlet and the gap distance of the gap is adjustable. The speed of the conveying belt andthe flow adjusting mechanism and the flow of solder can be accurately controlled by adjusting the distance between the material nozzle and the conveying belt, and large-particle solder is not rolledor smashed.

The invention, which relates to the technical field of gas path leakage detection, provides a gas path leakage detection device for a PDH device gas chromatograph, thereby mainly solving technical problems that in the prior art, the gas chromatograph gas path leakage detection operation difficulty is large, the detection sensitivity is not enough, and some trace leakage is not easy to detect. Thegas path leakage detection device for the PDH device gas chromatograph comprises an upstream end, a downstream end, a pressure stabilizing valve, a micro-pressure gauge and a flow meter; the upstreamend is connected with a gas source, the pressure stabilizing valve is arranged close to the upstream end, the downstream end is connected with a chromatograph to be detected, the micro-pressure gaugeand the flow meter are both located on a downstream pipeline of the pressure stabilizing valve, and the flow meter is arranged on the downstream of the micro-pressure gauge. The pressure stabilizing valve, the micro-pressure gauge and the flow meter are integrated together according to a specific sequence, so that an instrument to be detected is effectively protected, and the detection precision and the detection efficiency are improved; and the detection operation can be simplified, and the gas path leakage detection operation efficiency is improved.

The invention discloses an oil tanker wharf oil gas recovery method, which comprises the following steps that to-be-treated oil gas fed from an oil gas inlet is fed into an oil gas system and sequentially passes through a backheating heat exchanger, a pre-cooling heat exchanger, a shallow cooling heat exchanger, a deep cooling heat exchanger and a gas-fluorine heat exchanger in the oil gas system; oil gas is liquefied through heat exchange with a refrigerant sent out by a refrigerating system, and the oil gas treated by the gas-fluorine heat exchanger is sent into the regenerative heat exchanger again and discharged after heat exchange in the regenerative heat exchanger. When the system needs to be defrosted, a high-temperature and high-pressure refrigerant is fed into the shallow cooling heat exchanger and the deep cooling heat exchanger to be defrosted. According to the invention, the cold field temperature fluctuation of the oil tanker wharf oil gas recovery device is +/-4 DEG C, and the energy efficiency is improved by more than 40%.

The invention discloses a novel stop valve, which comprises a valve body, fixed bolts, fixing nuts, a valve cover, connecting bolts, connecting nuts, a bracket, a scale indicator board, a spring sleeve, a pressure spring, a pressing ring, a threaded valve rod, a valve rod nut, a hand wheel, a pointer, a lifting rod, a packing pressing plate, a packing gland, a sealing filler, a flow equalizing cover, a valve disc, a soft sealing ring, a valve seat, compression bolts and compression nuts, wherein the pressure spring, the packing gland and the sealing filler are arranged, so that the sealing performance of the stop valve is improved, the stop valve achieves a function of automatic closing, the medium leakage problem is avoided, the pipeline aging risk is reduced, and the pipeline safety is improved; the scale indicator board and the pointer are arranged, so that the stop valve has a pressure display function, the personnel can conveniently and precisely adjust the pressure of the mediumin the valve body, so that the personnel can conveniently and precisely adjust the flow of the medium according to the needs, the functionality of the stop valve is enhanced, and the market competitiveness of the stop valve is improved.

The invention discloses a tanker wharf oil gas recovery device which comprises an oil gas system, a refrigerating system and a control system. The shallow cooling heat exchanger and the deep cooling heat exchanger form a double-gas-path channel, and continuous operation of the oil tanker wharf oil gas recovery device is guaranteed; the technology that a single compressor controls a two-way cold field is further utilized, it is guaranteed that the cold field temperature fluctuation of the oil tanker wharf oil gas recovery device is +/-4 DEG C, and the energy efficiency is improved by 40% or above.

The invention discloses a fuel gas adjusting intelligent valve which comprises a valve body provided with a main gas inlet and a valve cover provided with a small fire nozzle and a large fire nozzle, a small fire gas outlet hole corresponding to the small fire nozzle is formed in the inner side of the valve cover, a large fire gas outlet hole corresponding to the large fire nozzle is formed in the inner side of the valve cover, and fuel gas is conveyed to the small fire gas outlet hole and the large fire gas outlet hole through the main gas inlet. The gas outlet adjusting assembly is used for controlling opening and closing of the small fire gas outlet hole and the big fire gas outlet hole and controlling the opening degree of the big fire gas outlet hole and comprises an adjusting gear and an adjusting motor for driving the adjusting gear to rotate; the adjusting gear is provided with a soft fire adjusting hole corresponding to the soft fire air outlet hole and a big fire adjusting hole corresponding to the big fire air outlet hole. The flow can be accurately adjusted, installation in multiple directions can be achieved, and adaptability to the installation environment is higher.

The invention discloses a welding clamp of a nuclear fuel assembly grillwork, and belongs to the technical field of nuclear industry auxiliary equipment. The welding clamp of the nuclear fuel assembly grillwork comprises a bottom plate, a cover plate, a side plate, a connector mechanism and a liquid supply device. Transverse clamping grooves and longitudinal clamping grooves are formed in the upper surface of the bottom plate, and the transverse clamping grooves intersect with the longitudinal clamping grooves. Intersecting transverse clamping grooves and longitudinal clamping grooves are also formed in the lower surface of the cover plate, welding holes are also formed in the positions, where the transverse clamping grooves intersect with the longitudinal clamping grooves, of the cover plate and the bottom plate, and liquid outlets and multiple cooling holes are formed in the cover plate and the bottom plate. One end of the side plate is detachably connected with the bottom plate, and the other end of the side plate is connected with the bottom plate. The connector mechanism comprises a liquid inlet and liquid through holes, and the liquid inlet communicates with the liquid through holes. The liquid supply device communicates with the liquid inlet. According to the welding clamp of the nuclear fuel assembly grillwork, the welded nuclear fuel assembly grillwork is effectively cooled, and therefore thermal deformation or overhigh internal stress of the nuclear fuel assembly grillwork is effectively prevented from being caused by welding heat, the welding precision is improved, and the service life of the nuclear fuel assembly grillwork is prolonged.

The invention discloses an adjustable section type reverse osmosis membrane detection system. The system comprises a raw water tank, a water production tank, a concentrated water tank, an electric control device, and a first reverse osmosis membrane device, a second reverse osmosis membrane device, a third reverse osmosis membrane device and a fourth reverse osmosis membrane device which are connected in parallel. The system is provided with the four groups of reverse osmosis membrane devices, and four operation modes of any one-way or multi-way operation can be realized through valve adjustment; the raw water tank, the water production tank and the concentrated water tank are arranged, and switching between continuous self-circulation operation and non-self-circulation operation of the system can be achieved through valve adjustment.