42 results about "Open adjustment" patented technology

The invention relates to the technical field of gas detection, and discloses a multi-channel detection switching system of a gas measuring instrument, which is characterized in that a collecting and processing unit collects a pressure change sequence output by a pressure transmitter, constructs a first replacement curve based on the pressure change sequence, determines a second replacement curve based on gas flow, and transmits the second replacement curve to a control unit; the first detection switching unit fits the first replacement curve and the second replacement curve, the channels are grouped by adopting a clustering algorithm based on the dynamic characteristics of the channels, and the second detection switching unit compares the pressure-flow curve with the fitted curve; whether the opening degree of the pressure regulating valve is adjusted or not is judged according to the deviation of the pressure-flow curve and the fitting curve, the opening degree adjusting strategy of the pressure regulating valve is determined based on the change of the gas flow and the traversal result of the historical database, the switching gating unit adjusts the opening degree of the pressure regulating valve according to the opening degree adjusting factor, and gating is completed through the adjusted opening degree. According to the invention, the reliability of multi-channel detection switching is ensured.

The invention is suitable for the technical field of intelligent household appliances, and provides an air conditioner. Wherein the outdoor unit comprises a controller, a compressor and a first expansion valve, the compressor is used for compressing and conveying a refrigerant, and the first expansion valve is used for controlling the conveying flow of the refrigerant in the outdoor unit; the controller is configured to determine a first opening value according to the frequency of the compressor; calculating an opening adjustment value according to the first pressure value; wherein the first pressure value is used for representing the actual pressure on the pipeline processed by the first expansion valve; adjusting the first opening value according to the opening adjustment value to obtain a second opening value; and the opening degree of the first expansion valve is adjusted according to the second opening degree value. In this way, the opening degree control precision of the first expansion valve can be effectively improved, and therefore precise control over the pressure of the air conditioner pipeline is achieved on the premise that the performance of the whole unit is not reduced.

The utility model relates to the technical field of liquid injection valves, in particular to a normally-open type fluid control liquid injection valve, an inner core in a valve core assembly of the normally-open type fluid control liquid injection valve keeps a distance larger than 0.1 mm from a liquid outlet in a natural state, so that the liquid injection valve is kept in a normally-open state, the requirement for continuously introducing air pressure to maintain liquid circulation is lowered, energy consumption and operation cost are reduced, and the service life of the liquid injection valve is prolonged. The backflow preventing assembly comprises a sealing ring and a second abutting block, the sealing ring is driven by liquid backflow pressure to cover a gap between the second abutting block and the liquid inlet pipeline, the backflow phenomenon is reduced, the air pressure driving assembly pushes sealing rubber to deform by adjusting air pressure, then the displacement of the inner core is controlled, and opening adjustment of the liquid outlet pipeline is achieved. And the first spring and the second spring work cooperatively, so that resetting of the inner core and the piston rod is ensured.

The application belongs to the technical field of household appliances, and specifically discloses an automatic door opening and closing method of a dishwasher and the dishwasher. The automatic door opening and closing method comprises the following steps: when a door opening instruction is received and the upper end of a door assembly is opened by a preset distance, a door opening adjustment action is performed, so that the gravity torque of the gravity of the door assembly on the rotation axis of the door assembly is greater than the support torque applied to the door assembly by a hinge mechanism, and the door opening adjustment action comprises increasing the gravity center height of the door assembly and / or increasing the gravity of the door assembly; and / or when a door closing instruction is received and the door assembly is in an open state, a door closing adjustment action is performed, so that the gravity torque is less than the support torque, and the door closing adjustment action comprises reducing the gravity center height of the door assembly and / or reducing the gravity of the door assembly. The application can realize the automatic door opening and closing action of the dishwasher by adjusting the gravity and / or gravity center height of the door assembly, and improve the automation degree and use experience of the dishwasher.

The invention discloses an opening degree adjusting actuator, a gas compressor and a vehicle, and relates to the technical field of vehicle manufacturing, the opening degree adjusting actuator is suitable for being connected to the gas compressor, the gas compressor is provided with a gas inlet, the opening degree adjusting actuator comprises a driving structure and an adjusting structure, the adjusting structure comprises an adjusting ring and a plurality of adjusting blades, and the driving structure is connected with the adjusting ring; the adjusting blades are arranged to be rotatable; the adjusting ring is arranged to enable the multiple adjusting blades to rotate together and adjust the opening degree of the air inlet through guiding sliding fit of the guiding protruding parts and the guiding sliding grooves during rotation. According to the opening degree adjusting actuator, the adjusting ring can drive the multiple adjusting blades to rotate at the same time so as to change the opening degree of the air inlet, so that the air inlet diameter of the air compressor can be reduced by reducing the opening degree of the air inlet, the trim of the air compressor can be reduced, the surge boundary moves in the small flow direction, and the flow rate of the air compressor is increased. Therefore, the working condition point can fall on the right side of the surge boundary, and the possibility of surge phenomenon is reduced.

This invention provides a method for controlling the opening degree of an expansion valve, a controller, and a heat pump unit. The method for controlling the opening degree of the expansion valve includes the following steps: S102: obtaining the discharge temperature change rate ΔTd of the compressor; S103: setting an adjustment period Δtc according to the discharge temperature change rate ΔTd, wherein the larger the discharge temperature change rate ΔTd, the shorter the adjustment period Δtc; S104: calculating the opening adjustment amount ΔP of the electronic main expansion valve within each adjustment period Δtc; S105: adjusting the opening degree of the electronic main expansion valve according to the calculated adjustment amount within each adjustment period Δtc. Compared with the prior art, this invention sets the adjustment period by the discharge temperature change rate to adjust the opening degree of the expansion valve in a timely manner, thereby effectively preventing the compressor discharge temperature from becoming too high under low ambient temperature conditions and ensuring the normal operation of the heat pump unit.

The invention belongs to the technical field of turbocharging, and discloses an opening degree adjusting assembly for an automobile nozzle ring, which comprises a compression mechanism, and further comprises a turbine assembly fixedly arranged on the compression mechanism; and the variable air guide assembly is arranged in the turbine assembly. In the working process of the engine, the connecting ring drives the first arc-shaped guide vane to be gradually opened, a waste gas circulation channel is expanded, and when the engine is in the high-speed working condition, the connecting ring, the first arc-shaped guide vane and the second arc-shaped guide vane axially move to enter the containing annular groove in the turbine exhaust part; at the moment, the waste gas enters the turbine exhaust part to be in direct contact with the turbine unit, so that the turbine unit and the compressor unit are pushed to work, the phenomena of vibration and local kinetic energy loss caused by vortex and wake of the waste gas due to the influence of guide vanes of the nozzle ring are avoided in the process, and meanwhile, the waste gas guide efficiency of the engine is improved.

This application relates to the field of vacuum control technology, and provides a control system, control method, and medium for a vacuum butterfly valve. It aims to solve the problems of poor scalability, high module coupling, and easy cascading failures in existing vacuum butterfly valve control systems. The method is applied to the main control module of the vacuum butterfly valve control system, which also includes a drive module and a pressure acquisition module. The method includes: acquiring the current pressure information of a preset cavity through the pressure acquisition module; acquiring the opening adjustment information of the target valve plate in the preset cavity based on the target pressure information and the current pressure information; and controlling the drive module to adjust the opening of the target valve plate according to the target opening information. The method reduces coupling and improves system stability and maintainability by allowing the main control, drive, and acquisition functions to operate independently. Simultaneously, the step-by-step collaborative processing of pressure acquisition, opening calculation, and drive execution improves signal processing efficiency and system response speed.

The invention belongs to the technical field of temperature control, and provides a hearth temperature control method and system, and the method comprises the steps: obtaining the hearth temperature, the header pipe pressure, the opening degree of a gas valve for adjusting the gas flow, and the opening degree of an air valve for adjusting the air flow, carrying out the preprocessing of the obtained data, and extracting the features of the preprocessed data; according to the current features, obtaining candidate opening adjustment amounts of the gas valve and the air valve by using a pre-trained decision network model constructed based on a reinforcement learning method; according to the combustion condition of the hearth, multi-stage safety constraints are introduced, the candidate opening degree adjustment amount is corrected, the final opening degree adjustment amount is obtained, and the opening degree of the corresponding valve is controlled; a double-valve linkage mechanism of the gas valve and the air valve is adopted, the opening adjustment amount of the gas valve and the opening adjustment amount of the air valve are output at the same time in one reinforcement learning decision, fuel supply and the combustion air proportion are automatically matched, and cooperative control is achieved.

The utility model discloses a nozzle with opening degree adjusting structure, including the spray pipe, its output end hingedly arranged with a plurality of annular distribution's first arc plate and second arc plate, each first arc plate all is located corresponding second arc plate far from the spray pipe axle center one side, and it can all rotate and present diffusion shape and spread to the side far from the spray pipe axle center, the diffusion bowl with filter hole is set up in the spray pipe, diffusion bowl is close to the spray pipe output end one side diameter is greater than its far from the spray pipe output end one side, control assembly, it includes the multiple transmission rod of hingedly arranged on each first arc plate and second arc plate and sets up on the spray pipe drive equipment. The utility model discloses can adjust the diffusion range of coal powder according to actual conditions, thus has improved the contact area of coal powder and air, makes the combustion more complete, and simultaneously this diffusion range can change according to the different of first arc plate and second arc plate rotation angle, thereby convenient to use.

The invention provides a vehicle air inlet system control method and a vehicle, and relates to the technical field of vehicle control. The working condition information comprises the working state information of the air inlet system, the opening degree information of the grille and the vehicle speed; based on the working condition information, the pollution degree of environmental pollution of the air inlet system is predicted; based on the pollution degree, a target control strategy for the air inlet system is generated, and the air inlet system is controlled to work according to the target control strategy; the target control strategy comprises a grating opening adjustment strategy and an air duct combination strategy. According to the technical scheme, the air inlet quality can be improved, the situation that the air filter element is blocked is avoided, cooperative control over the air duct and the grille based on the pollution degree is achieved, the diversity of control modes is improved, the air conditioner can better adapt to the complex and changeable operation environment, and it is ensured that an engine can work normally.

The invention discloses an air cooling unit temperature control adjusting method and system based on self-adaptive model prediction, and relates to the technical field of industrial cooling control, and the method comprises the steps: collecting air temperatures and water temperatures of a plurality of spatial positions of an air cooling unit, enabling each spatial position to correspond to an independent fan and a cooling water valve, and obtaining a preset temperature threshold value and a space temperature difference threshold value; the air temperature and the water temperature are input into a prediction model, the predicted temperature of each spatial position is obtained, and the predicted temperature difference between the adjacent spatial positions is calculated; identifying a spatial position where the predicted temperature exceeds a temperature threshold or the predicted temperature difference exceeds a spatial temperature difference threshold as a to-be-adjusted position; determining the rotating speed adjusting quantity of a fan corresponding to the to-be-adjusted position and the opening adjusting quantity of a cooling water valve based on the exceeding amplitude; and the rotating speed adjusting quantity and the opening adjusting quantity are output to a fan and a cooling water valve at corresponding spatial positions. According to the invention, excessive adjustment of all actuators is avoided, the space temperature distribution uniformity is improved, the total cooling energy consumption is reduced, and the thermal fatigue of equipment is relieved.

This invention discloses a jaw crusher, including a frame assembly, a fixed jaw plate, a movable jaw assembly, a rocker arm assembly, a suspension shaft assembly, and a transmission assembly. The frame assembly includes two side plates arranged opposite each other. This jaw crusher suspends the upper part of the movable jaw assembly to the frame assembly via the suspension shaft assembly, and adjusts the lower part of the movable jaw assembly to a fixed base via the rocker arm assembly. Furthermore, a first connecting assembly and a second connecting assembly on the movable jaw assembly, along with a sliding groove on the fixed base, allow the rocker arm assembly to be adjusted between different connection positions and different adjustment positions. This not only enables fine-tuning of the discharge opening but also allows switching of the discharge opening adjustment range, effectively increasing the adjustment range of the discharge opening and facilitating adjustments according to different material particle sizes and different working conditions.

The utility model relates to the technical field of sand core assembly equipment, in particular to a split assembly sand core device for a cylinder barrel core of an automatic line of a large-sized cylinder body. The device comprises a working platform, a first linear sliding rail, a second linear sliding rail, a first placing platform, a first driving unit and a second driving unit, wherein the first linear sliding rail and the second linear sliding rail are arranged on the working platform and are arranged in parallel; the first placing platform is arranged on the first linear sliding rail in a sliding manner through a sliding block; the first driving unit is arranged on the working platform surface and is used for driving the first placing platform to move; the second linear slide rail is arranged on the working platform, the second placing platform and the third placing platform are respectively arranged on the second linear slide rail through slide blocks, and the fourth placing platform is arranged on the working platform. The utility model has the beneficial effects that the adjusting component is arranged in the extrusion module, an adjustable structure is arranged, the position of the profiling module is adjusted, accurate adjustment can be realized, and the PP framework can be opened and tightened, so that the problems that the opening of the framework is difficult to adjust and the adjustment scrap rate is large are effectively solved.

A kind of overflow valve disc fluid force measuring device and test method for measuring the fluid force on the valve disc under different pressures and different valve openings. The test bench is mainly composed of four parts: oil supply system, control system, valve disc fluid force test system and data acquisition system. The variable frequency motor is used in the oil supply system, and a proportional-integral-derivative (PID) control method is proposed to adjust the motor speed. The motor speed is adjusted in real time to obtain accurate pressure values. The fluid force test system includes a valve opening adjustment mechanism that can accurately adjust the valve opening in cooperation with a laser displacement sensor. The fluid force measuring mechanism mainly measures the lift of the valve disc in real time through an S-shaped force sensor. The valve body is made of transparent material PMMA, which can observe the change of valve disc opening in valve body in real time, and also can observe the action state of hydraulic oil on valve disc. The device has simple structure, high precision and high safety, which provides guarantee for the test of overflow valve fluid force.

This invention relates to an adjustable hemostatic valve device, comprising a catheter sheath housing, a catheter sheath cap, a seal, and an opening adjustment mechanism. The catheter sheath housing and the catheter sheath cap are connected and axially movable relative to each other. The seal and the opening adjustment mechanism are connected and disposed within the catheter sheath housing. The opening adjustment mechanism includes a first positioning plate and a mounting cylinder. The seal is fixedly connected to the first positioning plate and then installed within the mounting cylinder. The seal includes an axially extending spiral flow channel. The distal end of the seal is fixed to the mounting cylinder, and the proximal end is fixedly connected to the first positioning plate. Multiple first positioning pins are distributed on the outer periphery of the first positioning plate, and multiple spiral sliding guide grooves are formed at the proximal end of the mounting cylinder. The axial movement of the catheter sheath cap allows the first positioning pins of the first positioning plate to slide along the sliding guide grooves of the mounting cylinder, compressing and rotating or releasing and rotating the seal to adjust the opening size of the spiral flow channel of the seal.

The invention relates to the field of industrial aluminum alloy, and discloses a method for improving homogeneous cooling uniformity, which comprises the following steps of: determining the water quantity of homogeneous cooling water and the initial opening degree of a water valve of a homogeneous cooling chamber according to the temperature of a bar; chaos state characteristics of homogeneous cooling water are extracted based on the chaos theory, multi-step prediction and risk judgment are carried out, and a neural network model of the homogeneous cooling water temperature and the opening degree adjustment amount of a homogeneous cooling chamber water valve is trained under the constraint of a stable operation interval; the opening degree adjustment amount is output through a neural network model, the water valve opening degree adjustment amount is optimized and decomposed into temperature deviation, energy consumption, chaotic stability and response smoothness target sub-population independent evolution through a co-evolution mechanism, and the global optimal opening degree adjustment amount is obtained through dynamic weighted combination; and based on the global optimal opening degree adjustment amount corresponding to the current homogeneous cooling water temperature and the initial opening degree of the homogeneous cooling chamber water valve, the final opening degree of the homogeneous cooling chamber water valve is determined. And precise, stable and efficient control of homogeneous cooling is realized.

To provide an improved and novel air blowing device that enables air to be blown at a higher flow rate in any direction over a wider range. [Solution] When the control device for the air blowing device is instructed to blow air in the direction that results in the maximum deviation in one vertical direction, it sets the opening adjustment section of the other vertical passage to the maximum opening and the other opening adjustment sections to the minimum opening. When the control device is instructed to blow air in the direction that results in the maximum deviation in one horizontal direction, it sets the opening adjustment section of the other horizontal passage to the maximum opening and the other opening adjustment sections to the minimum opening. Furthermore, when the control device is instructed to blow air in the direction that results in the maximum deviation in both the horizontal and vertical directions, it controls the opening adjustment sections of the other horizontal passage and the other vertical passage to the maximum opening and the other opening adjustment sections to the minimum opening.

This invention provides a butterfly valve opening adjustment mechanism, including a valve shaft, a butterfly plate, and a valve body. The upper end of the valve shaft is connected to an inner disc. Two bosses I on the inner disc are connected to one side of a hook spring. The inner disc has a groove I on its edge that mates with a stop block. The stop block is positioned within a groove II on an outer ring that mates with the inner disc. A spring is located on the back of the stop block. A rotatable column is located in the central hole of the inner disc. A boss II is located on the side of the column and is connected to the other side of the hook spring. This opening adjustment mechanism provides both a certain degree of opening adjustment and a self-locking capability.

The utility model relates to the technical field of compressor accessories, in particular to a compressor guide ring device which is characterized in that a guide ring body is in an open ring shape, one end is provided with a positioning sleeve with internal threads, the other end is connected with a threaded rod adjusting assembly, and the guide ring body and the threaded rod adjusting assembly are in threaded fit to achieve opening size adjustment and can adapt to a composite sound absorption mechanism of different working conditions and inner ring surfaces. The guide ring is composed of an inorganic foam sound-absorbing base layer, a sound-absorbing fiber transition layer and a damping material covering layer, operation noise can be effectively absorbed, the first wear-resisting layer made of the ceramic matrix composite material on the outer ring face and the second wear-resisting layer made of the tungsten carbide coating on the side face remarkably enhance wear resistance, and the problems that an existing guide ring is inconvenient to adjust in opening, poor in sound absorption and insufficient in wear resistance are solved. And the operation stability of the compressor is improved, the service life is prolonged, and good application prospects are achieved.

The utility model relates to the technical field of die-cutting machines, in particular to a marine valve actuator with stable output, which comprises a valve body and further comprises a rotating shaft arranged in a cavity groove of the valve body. The two spacing plates are arranged on the two sides of the rotating shaft, the spacing plates and the wall of the cavity groove form a sealing structure, different media or pressure areas are isolated, and the media are prevented from leaking or being mixed with each other; the driving assembly is arranged on the valve body and used for driving the angle of the two spacing plates on the rotating shaft; the controller is arranged on the valve body and used for receiving a signal from a ship control system, accurately controlling the driving component and achieving opening adjustment of the valve, rotating teeth of the motor are connected with tooth cavities of the rotating shaft in an embedded mode, the rotating teeth of the motor and the rotating shaft of the valve can be tightly meshed through the embedded connection, and therefore the opening degree of the valve can be adjusted. Vibration and impact in the ship running process can be effectively resisted, compared with traditional coupling connection, the loosening risk is greatly reduced, and the long-term stability of connection is guaranteed.

The application relates to the technical field of greenhouses, and further relates to a control method and system for a ventilation opening of a greenhouse. The method comprises the following steps: collecting adjustment data of the ventilation opening based on a sensor, wherein the adjustment data is one of environmental data in the greenhouse, an opening and closing width and an opening and closing angle of the ventilation opening, and a current stroke of a servo motor installed on the ventilation opening; generating a ventilation opening adjustment instruction based on the adjustment data, wherein the ventilation opening adjustment instruction is any one of a first adjustment instruction generated based on the environmental data, a second adjustment instruction generated based on the opening and closing width and the opening and closing angle, and a third adjustment instruction generated based on the current stroke; and adjusting an opening area of the ventilation opening based on the ventilation opening adjustment instruction. The method realizes accurate monitoring of the opening area of the ventilation opening and effective regulation and control of the internal environment of the greenhouse.

This invention discloses a novel disturbance-suppressing brush seal, comprising: a brush seal element and a disturbance-suppressing hole opening adjustment structure. The brush seal element includes a front baffle, a brush filament bundle, and a rear baffle. The portion of the front baffle near the rotor has disturbance-suppressing holes evenly arranged circumferentially. The disturbance-suppressing hole opening adjustment structure is installed at the front end of the front baffle and includes an external gear disk, a planetary gear, and an internal gear disk. The internal gear disk is fitted in front of the front baffle and has corresponding holes that mate with the disturbance-suppressing holes on the front baffle. The external gear disk is meshed with the planetary gear and connected to the outside of the internal gear disk. This novel disturbance-suppressing brush seal has a simple structure, reliable operation, and adjustable disturbance-suppressing hole opening, which can evenly suppress disturbances and seal leakage.

This invention relates to the field of digital twin technology, specifically disclosing a digital twin-based intelligent control method for shut-off valves, comprising the following steps: decomposing a digital twin model of a pipeline network system into several sub-models, each sub-model corresponding to a shut-off valve and a corresponding associated pipeline network area; acquiring monitoring data of a single shut-off valve and transmitting the monitoring data to the corresponding sub-model, which updates its model state based on the monitoring data; exchanging monitoring data among the sub-models to form a global dataset; calculating the valve opening adjustment amount based on the updated model state of the sub-models and the global dataset; and sending the opening adjustment amount to the shut-off valve actuator, which drives the shut-off valve to operate. This invention achieves global hydraulic coupling state perception of the pipeline network by dividing associated areas and exchanging data; and effectively suppresses pressure fluctuations and hydraulic imbalances based on collaborative calculation of valve opening adjustment amounts.

This invention relates to the field of steam turbine technology, and discloses a method and system for regulating the heating parameters of a steam turbine intermediate-pressure regulating valve. The method involves acquiring the operating parameters and external heat load demand parameters of the intermediate-pressure regulating valve heating parameter regulation system; constructing a dynamic coupling model between the intermediate-pressure regulating valve opening and the amount of steam extracted for heating; generating an intermediate-pressure regulating valve opening adjustment strategy based on the dynamic coupling model, including the valve opening target value and the rate of change limit; outputting control commands to the intermediate-pressure regulating valve actuator according to the opening adjustment strategy to adjust the amount of steam extracted for heating; correcting the model coefficients of the dynamic coupling model based on the deviation between the adjusted actual heating parameters and the external heat load demand parameters; and achieving precise adjustment of the amount of steam extracted for heating and coordinated control of multiple regulating valves by constructing a dynamic coupling model between the intermediate-pressure regulating valve opening and the amount of steam extracted for heating, combined with safety margin assessment and adaptive coefficient correction, thereby improving the heating response speed, regulation accuracy, and operational safety of the cogeneration unit.

The utility model belongs to the technical field of shot blasting machine device, concretely relates to a kind of shot conveying pipeline opening adjusting mechanism. Including shot blasting machine body, the through hole is equipped on the shot blasting machine body, the shot blasting machine body is communicated with shot conveying pipe by through hole, and opening adjusting mechanism is equipped between the shot blasting machine body and shot conveying pipe. The utility model can adjust the shot flow by motor control the opening size of each special-shaped opening and closing plate, and the production line of shot blasting machine is by eight groups of air cylinder, according to the specification of workpiece cleaning, any combination opening and closing gate number can be combined, to save energy, reduce the wear of machine, and ensure to meet production needs, and the maintenance of each shot blasting machine can also be realized.

The invention discloses an electric wheel dumper engine compartment heat preservation device and a control method, and belongs to the technical field of electric vehicles, the electric wheel dumper engine compartment heat preservation device comprises control assemblies and two sets of heat dissipation covers, and the two sets of heat dissipation covers are arranged on the left side wall and the right side wall of an engine compartment respectively and controlled by one set of control assemblies respectively; the control assembly comprises a direct-current motor, an electric-hydraulic pusher, a rotating frame, an L-shaped rod, a connecting piece and a control rod, the direct-current motor is installed at the top end of the engine compartment, the electric-hydraulic pusher is driven by the direct-current motor, the L-shaped rod is rotatably installed on the rotating frame, one end of the L-shaped rod is connected with the control rod through the connecting piece, and the other end of the L-shaped rod is hinged to a piston rod of the electric-hydraulic pusher; the control rod is connected with the heat dissipation cover and used for controlling the opening and closing degree of the heat dissipation cover. A combined structure of a direct current motor and an electric-hydraulic pusher is adopted as a core power component to drive opening and closing actions of the engine heat dissipation cover, opening adjustment of the heat dissipation cover can be accurately controlled, and heat dissipation requirements in different directions can be met through respective control of the left heat dissipation cover and the right heat dissipation cover.

The invention provides a direct-acting type flow control electromagnetic valve, an opening degree control method, electronic equipment and a storage medium, and relates to the field of valve body equipment. The opening degree control method comprises the following steps that operation characteristic data of a direct-acting type flow control electromagnetic valve are obtained, the direct-acting type flow control electromagnetic valve is provided with a reset telescopic spring, and opening degree adjustment of the direct-acting type flow control electromagnetic valve can drive the reset telescopic spring to stretch out and draw back; the operation characteristic data is used for representing the elastic force of the reset telescopic spring. And comparing the operation characteristic data with preset characteristic data, and determining a target working operation mode of the direct-acting flow control solenoid valve according to comparison result information. And controlling the operation of the direct-acting flow control electromagnetic valve based on the target working operation mode, so that the operation characteristic data meet the standard of the preset characteristic data. According to the direct-acting type flow control electromagnetic valve, the opening degree can be accurately adjusted, the precision of controlling the flow of fluid is improved, and the influence of flow fluctuation of the fluid on opening degree adjustment is reduced.

The application discloses a kind of automatic regulation control methods of boiler furnace negative pressure, first set the set range of multiple groups current damper baffle opening value and the set range of corresponding negative pressure deviation absolute value, the set range of each current damper baffle opening value and the set range of negative pressure deviation absolute value are corresponding to the corresponding damper baffle opening adjustment value, establish the judgment condition of multiple damper baffle opening adjustment value;Subsequently, according to the current damper opening value obtained and the deviation absolute value matched with the established damper baffle judgment condition are adjusted.It is characterized in that: control method implementation process is simple, control process is efficient, set new judgment condition and control logic in original boiler control system can realize furnace negative pressure automatic regulation, without increasing additional investment;Fully consider the influence of current damper baffle opening value on opening adjustment amount, reduce the furnace fluctuation in the adjustment process, help to stabilize boiler combustion.

The invention relates to the technical field of hardware tools, in particular to a portable light pipe wrench capable of quickly adjusting an opening, which comprises a wrench handle provided with adjusting teeth; an upper clamp body; the sliding seat slidably sleeves the periphery of the forceps handle, a mounting groove is formed in one end, far away from the forceps handle, of the sliding seat, and an opening adjusting mechanism is mounted in the mounting groove; the lower clamp seat is fixedly mounted on the top surface of the sliding seat, a pushing structure is arranged at the top end of the lower clamp seat and is in transmission connection with a mounting seat, and a lower clamp body is fixedly mounted on the mounting seat; the adjusting component is fixedly arranged in the middle of the side surface of the clamp handle; the clamping force can be accurately controlled through the adjusting assembly and the pushing structure, the adaptive force can be matched according to the material and thickness of the pipe fitting, the workpiece damage risk is reduced, and the operation precision is improved.