20results about How to "Adjustable opening" patented technology

The invention provides an intelligent water turbine control method based on a digital speed regulator, which comprises the following steps of: forming a first data set by collecting rotating speed frequency, active power and water head signals of a water turbine generator set, and providing a basic data source for a control decision; performing credibility verification on the first data set through a physical rule, generating a verified second data set, and ensuring that the data input into the control logic is accurate and credible; based on the second data set, dynamically selecting at least two control algorithms adaptive to the working condition, fusing the outputs of the algorithms, and calculating to obtain an accurate guide vane opening control instruction, so as to solve the problem of insufficient adaptability of a single algorithm; then the guide vane opening control instruction is converted into a driving signal to operate an electro-hydraulic follow-up system, and adjustment of the guide vane opening is achieved; and finally, guide vane opening feedback is obtained, an instruction and the feedback are compared to generate evaluation data, and control algorithm parameters are adaptively corrected according to the evaluation data, so that the problem that the control effect of a single control algorithm on the water-turbine generator set is poor is solved.

The present invention discloses a nonlinear cooling control method, device and system based on an environmental test chamber. The temperature description information corresponding to the environmental test chamber is obtained; the total cooling range and the average cooling rate are calculated according to the temperature description information; the number of cooling calculations is determined according to the cooling accuracy, and at least two pairs of cooling description information consisting of cooling time and cooling rate are calculated according to the cooling calculation number, the total cooling range and the average cooling rate through a pre-constructed nonlinear control calculation method; the electronic expansion valve opening and the evaporator fan speed are calculated according to each of the cooling description information, so as to realize nonlinear cooling control according to the electronic expansion valve opening and the evaporator fan speed. The problem that the product cannot be accurately controlled by nonlinear cooling is solved, the accuracy and precision of the nonlinear cooling control are improved, and the ability to accurately judge the reliability of the product is improved.

The utility model discloses an integrated catalytic reactor used in a styrene production process. The integrated catalytic reactor comprises a gas inlet for introducing waste gas, a tubular heat exchanger, a plate heat exchanger, a catalytic bed, a temperature control device for adjusting the temperature of the waste gas in the tubular heat exchanger, and a gas outlet. Waste gas enters from the gas inlet and enters a pipe of the tubular heat exchanger from the gas inlet channel for heat exchange, so that the temperature is increased to be higher than the styrene polymerization temperature, and the waste gas enters the plate heat exchanger from the tubular heat exchanger through the first channel, is subjected to heat exchange again to increase the temperature, then enters the catalytic bed, and is subjected to catalytic reaction to form clean high-temperature flue gas; and the high-temperature flue gas passes through the third channel to the periphery of the plate heat exchanger and exchanges heat with waste gas in the plate heat exchanger, and the cycle is repeated. Waste gas in the low-temperature section is subjected to heat exchange through a tubular heat exchanger, the temperature of the waste gas is increased to be higher than the styrene polymerization temperature, and the tubular heat exchanger is not blocked; and the high-temperature section adopts the plate heat exchanger for waste heat recovery, waste heat is utilized, and the cost performance is high.

This invention discloses a composite flow control device of needle valve and pressure valve and its working method, which solves the problem that fluid controllers in the prior art all use single control. It has the beneficial effects of realizing the switching between pressure valve and needle valve and avoiding fluid contamination. The specific solution is as follows: A composite flow control device of needle valve and pressure valve includes a support frame, which supports a switching control structure. A needle valve and a pressure valve are arranged sequentially on one side of the switching control structure. The needle valve includes a needle valve body, a first flow channel is provided in the needle valve body, the needle valve body is connected to an isolation shell, an internal rotor is provided in the isolation shell, an external rotor is arranged circumferentially outside the isolation shell, the bottom of the isolation shell is fixedly connected to a screw, and part of the screw is located inside the internal rotor to form a helical drive between the internal rotor and the internal rotor. One end of the internal rotor is provided with a needle-shaped component that can be inserted into the first flow channel. The switching control structure includes a rotating shaft that passes through the support member. The rotating shaft is rotatable and is connected to the sun gear of the planetary gear component.

The invention relates to a damping-adjustable hydraulic lock suitable for a heightening oil cylinder of a coal mining machine, which comprises a valve block, and a first hydraulic control one-way valve, a second hydraulic control one-way valve and a one-way adjustable throttle valve which are arranged on the valve block. An inlet of the first hydraulic control one-way valve and a hydraulic control port of the second hydraulic control one-way valve are both communicated with a first inlet of the valve block, an outlet of the first hydraulic control one-way valve is communicated with an inlet of the one-way adjustable throttling valve, and an outlet of the one-way adjustable throttling valve is communicated with a first outlet of the valve block. An inlet of the second hydraulic control one-way valve and a hydraulic control port of the first hydraulic control one-way valve are communicated with a second inlet of the valve block, and an outlet of the second hydraulic control one-way valve is communicated with a second outlet of the valve block. When the rocker arm is heightened, frequent impact and vibration between the valve element and the valve seat are avoided, so that the rocker arm is long in service life, and the rocker arm can descend stably without shaking.

This invention relates to an intelligent electrical appliance, comprising a body having a drying chamber, wherein the body has an air inlet in fluid communication with the drying chamber; a drying module disposed within the body; a temperature sensor disposed within the drying chamber for detecting the temperature within the drying chamber; and an adjustment mechanism disposed on the air inlet, which adjusts the opening of the air inlet according to the temperature detected by the temperature sensor. This intelligent electrical appliance can adjust the opening of the air inlet through the adjustment mechanism to meet the airflow adjustment requirements corresponding to the humidity and temperature within the drying chamber, thereby achieving optimal drying effect. This invention also relates to a drying control method for this intelligent electrical appliance, wherein during drying operation, the temperature T within the drying chamber is detected in real time, and the opening of the air inlet of the drying chamber is adjusted according to a calculated temperature coefficient A. This invention further relates to a computer-readable storage medium storing a computer program / instructions executable by a processor to implement the aforementioned drying control method.

The utility model discloses a municipal road surface base course paving device which comprises a vehicle body in which a first material storage cavity, a second material storage cavity and a third material storage cavity are arranged, and is characterized in that the top of the vehicle body is provided with a screening assembly for carrying out three-stage screening on broken stones; the screening assembly screens broken stones and then guides the screened broken stones into the first storage cavity, the second storage cavity and the third storage cavity correspondingly, blanking grooves are formed in the bottoms of the first storage cavity, the second storage cavity and the third storage cavity, and a baffle assembly for shielding the blanking grooves is arranged at the bottom of the vehicle body; an adjusting assembly is arranged on one side of the vehicle body to enable the baffle assembly to slide left and right, the upper-layer screening box, the lower-layer screening box and the inclined plate vibrate and screen broken stones, and after the vehicle moves rightwards, a composite layer structure of lower-layer fine broken stones, middle-layer coarse broken stones and upper-layer medium-sized broken stones can be laid on a pavement base layer.

The utility model discloses an arc-shaped concrete formwork reinforcing assembly which comprises a vertically-arranged secondary keel and an adjustable chain type main keel, the adjustable chain type main keel comprises a plurality of fixing rods, every two left-right adjacent fixing rods are connected through an upper connecting rod and a lower connecting rod, and limiting grooves are formed in the ends of the fixing rods. A vertically-arranged stud is installed in the limiting groove in a penetrating mode, the stud is connected with the limiting groove through a sliding block, and the two connecting rods are hinged to the fixing rod through the stud. A clamping groove matched with a secondary keel is formed in the inner side of the middle of the fixing rod, the clamping groove is composed of a left groove-shaped clamping jaw and a right groove-shaped clamping jaw, the groove-shaped clamping jaws are connected with the fixing rod in a sliding mode, a split bolt hole is formed in the fixing rod, and the split bolt hole and the clamping groove are coaxially arranged. The reinforcing device can effectively reinforce the secondary keel on the outer side of the arc-shaped concrete formwork, the stability of the formwork after assembly is guaranteed, and concrete formwork expansion is effectively avoided.

The utility model belongs to the technical field of kitchen electric appliances, and discloses a steam jet and cooking equipment. The steam spray head comprises a spray head body and a cover assembly, a cavity is formed in the spray head body, and spray holes communicating with the cavity are formed in the spray head body; the cover assembly is connected with the spray head body and comprises an elastic piece and a movable cover, the elastic piece is connected with the movable cover, and the movable cover is configured to be capable of blocking the spray hole under pushing of the elastic piece or opening the spray hole under pushing of steam in the cavity. According to the steam jet, the jet hole can be opened after the steam pressure in the cavity reaches a certain value, so that the steam flowing into the cooking cavity is ensured to be good in flowability, the steam can be fully diffused and uniformly heated in the cooking cavity, and the cooking effect of food materials is improved.

The application discloses a multi-station processing machine tool for batch production, comprising a processing platform, a belt line and at least two stations arranged on the processing platform; the belt line is used for conveying products, one end of the belt line is used for feeding products, and the other end of the belt line is used for discharging products; each station comprises a carrying mechanism and a processing turntable, the carrying mechanism is used for taking products on the belt line to the processing turntable or taking products on the processing turntable to the belt line; the application can automatically feed and discharge products, does not need manual clamping, can process single products in single stations or process products in multiple stations synchronously, increases efficiency, improves production capacity, and is suitable for batch production.

The invention relates to the technical field of fresh air conditioner control, in particular to a fresh air conditioner control method and system.The control method is applied to a fresh air conditioner and comprises the following steps that S1, indoor and outdoor temperature values and indoor air parameters are obtained; s2, the indoor air parameters are compared with all preset air parameter standards, if parameters higher than all the air parameter standards exist in the indoor air parameters, an air outlet valve and an air outlet fan of an air outlet pipeline are opened, and an air inlet valve and an air inlet fan of a first air inlet pipeline are opened; s3, after an air inlet valve and an air inlet fan of the first air inlet pipeline are opened, the outdoor temperature value is compared with a preset comfortable temperature interval, and whether an air inlet valve and an air inlet fan of a second air inlet pipeline are opened or not is judged according to a comparison result; and the opening degrees of all the air inlet valves and all the air outlet valves are adjusted so that the indoor temperature can be kept within the comfortable temperature interval.

The utility model belongs to the technical field of ship valves, and relates to a ship valve rod control device. The valve piece (1) comprises a valve rod (2), the valve rod (2) is fixedly connected with a thread bushing (8), the outer ring of the thread bushing (8) penetrates through the valve piece (1), a thread bushing seat plate (9) is sleeved on the thread bushing (8), the thread bushing seat plate (9) and the thread bushing (8) are clamped and limited through a positioning pin (4), the thread bushing seat plate (9) is connected with a flange (5), the flange (5) is connected with an extension piece (6), and the extension piece (6) is connected with a control hand wheel (7). The valve rod control device for the ship valve is simple in structure, reliable in structure and long in service life, valve rod rotation control can be conveniently and reliably achieved at a long distance, and seawater inlet and outlet amount can be conveniently and rapidly adjusted and controlled.

The utility model belongs to the field of power module packaging, and particularly discloses a carrier tape pressing machine which comprises an installation assembly used for installing a carrier tape and a pressing assembly used for pressing the carrier tape, the pressing assembly comprises a heating piece, a sealing cutter installed on the heating piece and a driving piece used for driving the heating piece to move, the heating piece is detachably connected with a clamping block, and the clamping block is detachably connected with the sealing cutter. The sealing cutter comprises an installation part used for being connected with the clamping block in a clamped mode and a pressing part used for pressing the carrier tape, the pressing part is located over the installation assembly, the lower end of the pressing part protrudes out of the lower end of the clamping block, and a packaging groove is formed in the lower end of the pressing part. By adopting the scheme of the utility model, the problems that the whole set of heat sealing module needs to be replaced and the cost is relatively high because carrier tapes of different models need to be matched with different packaging grooves can be solved.

The present invention discloses a driving device, a driving assembly, a vehicle and a control method of the driving device, which relates to the field of vehicle technology and aims to solve the problem of how to reduce the temperature of a stator assembly, improve the thermal management capability of the driving device and improve the reliability of the driving device. The driving device includes a stator assembly, a rotor assembly, an oil circuit assembly and a first flow valve. The rotor assembly is movably inserted in the stator assembly. The oil circuit assembly includes an oil inlet pipe and a stator branch oil pipe and a rotor branch oil pipe connected to the oil inlet pipe. The stator branch oil pipe is connected to the stator assembly, and the rotor branch oil pipe is connected to the rotor assembly. The first flow valve is used to adjust the flow of the rotor branch oil pipe to control the flow of the stator branch oil pipe.

The invention discloses a three-way valve, a heat management system and a new energy automobile, and the three-way valve comprises a valve body, a valve core and a driving assembly; a first interface, a second interface and a third interface which are communicated with the valve cavity are formed in the outer wall of the valve body; a first opening, a second opening and a drainage groove are formed in the outer wall of the valve element, and the drainage groove is provided with a first port and a second port; the first opening communicates with the first connector, and the first opening and the first connector are located on the rotating axis of the valve element. In the first working mode, the first port is butted with the second interface, and the third interface is staggered with the second port and the second opening; in the second working mode, the first port is in butt joint with the third interface, and the second interface is staggered with the second port and the second opening; in the third working mode, the second port is in butt joint with the second connector, the second opening is in butt joint with the third connector, and the opening degree of the second connector and / or the third connector can be adjusted along with rotation of the valve element. According to the technical scheme, the flow direction of fluid can be controlled, and meanwhile the flow of the fluid can be adjusted.

The utility model discloses a concrete spreader lifting device which comprises a fixing seat, the fixing seat is installed on external equipment, a lubricating mechanism is arranged on the fixing seat, and the lubricating mechanism comprises a lifting arm, a lifting frame, a hydraulic cylinder, a fixing sleeve, a rotating shaft, a limiting disc, a one-way mechanism, an adjusting mechanism, an oil pipe, a piston plate, a sealing disc and a middle plate. The lifting arm is rotationally connected to the fixing base and the lifting frame, the fixing sleeves are fixedly installed on the fixing base and the lifting arm respectively, the rotating shaft is rotationally connected to the hydraulic cylinder and the fixing sleeves respectively, and the lubricating mechanism can effectively reduce friction among the fixing sleeves, the rotating shaft and the hydraulic cylinder, so that abrasion is reduced, and the service life of equipment is prolonged. By injecting lubricating oil, the smoothness and stability of the key parts during operation are ensured, and the overheating and damage risks caused by friction are reduced.

The invention discloses a proportional valve driver with a flutter function. The proportional valve driver comprises a microprocessor, a proportional valve control signal input circuit, a fundamental wave generation circuit, a PWM wave generation circuit, a triangular wave generation circuit, an AND gate circuit, a comparison circuit, a proportional valve control signal output circuit and a communication circuit. The input ends of the fundamental wave generating circuit, the PWM wave generating circuit and the triangular wave generating circuit are all connected with the microprocessor, the output ends of the fundamental wave generating circuit and the PWM wave generating circuit are respectively connected with the input end of the AND gate circuit, and the output end of the triangular wave generating circuit and the output end of the AND gate circuit are respectively connected with the input end of the comparison circuit. The output end of the comparison circuit is connected with the input end of the proportional valve control signal output circuit, and the output end of the proportional valve control signal output circuit is connected with an electromagnet of the proportional valve; one end of the communication circuit is connected with the microprocessor, and the other end of the communication circuit is connected with target equipment.

The utility model discloses a formaldehyde treatment device, which relates to the technical field of formaldehyde treatment and comprises an exhaust structure, an air guide structure, a detection structure and an opening and closing structure. An installation groove is formed in an exhaust pipe of the exhaust structure to fix the gas guide structure, and the gas guide pipe separates a gas path and a reaction area through a separation detection groove. A dosing tank of the detection structure stores a potassium permanganate solution and is controlled by an on-off pipe valve to be linked with a detection tank, and the formaldehyde concentration is fed back by monitoring the fading degree of the solution through a photoelectric sensor. The opening and closing structure adopts combination of magnetic suction sealing and thread transmission, and a driving motor drives a threaded rod and a top column to adjust the opening degree of an opening and closing plate, so that dynamic control of an air path is realized. After waste gas enters from the gas inlet, part of gas is guided into the gas guide pipe to react with a test solution, detection data are linked with the opening and closing structure in real time to adjust the exhaust efficiency, and the magnetic attraction block stops liquid backflow during shutdown. The device solves the problems of detection lag, backflow risk and manual dependence, and improves the processing precision and reliability.

The utility model provides a coal dressing and gangue discharging device for a coal mine, which belongs to the field of coal mining equipment and comprises a feeding screening mechanism, a transferring and gangue discharging mechanism and a dust falling mechanism. The feeding and screening mechanism is additionally arranged on the coal mine coal dressing and gangue discharging device, so that coal mine powder and ore particles are separated, and slack coal is automatically collected; a dynamic sorting and conveying combined operation mode is adopted in the transfer gangue discharging assembly to achieve recognition, distinguishing and separation of coal gangue and coal mine, sorted materials directly enter corresponding conveying channels, and secondary mixing is avoided. And finally, a dual-protection system is formed through a dust cover and an air suction dust-falling device in the dust-falling mechanism, the dust cover is designed in a surrounding mode to be matched with the air suction dust-falling device, the dust diffusion range of a feeding port is narrowed, the air suction dust-falling device is in linkage with the injection action of an execution assembly, and pulverized coal particles generated during operation are captured in real time. And the problem of pulverized coal diffusion caused by injection of the to-be-screened coal mine dumped from the feeding port and the execution assembly is solved.

The invention belongs to the technical field of oil production engineering equipment, and discloses a time-delay toe-end sliding sleeve capable of multiple pressure tests, which comprises an upper joint, a high-strength outer pipe, a sand blasting inner pipe, a rupture disc, an opening control mechanism and a time-delay mechanism. According to the high-temperature and high-pressure delay toe-end sliding sleeve capable of being subjected to multiple pressure tests, the full-drift-diameter structural design is adopted, the inner drift diameter is the same as the size of a sleeve of the same specification, and when cement is returned or a stratum is opened and cannot absorb water, and the accidents cannot be opened, treatment is convenient; when the outer sand blasting hole in the high-strength outer pipe is fully opened, the first-section fracturing large-displacement requirement can be met, the limit position of the sliding sleeve can be adjusted through ground pressing when the sliding sleeve opens the stratum due to the fact that the stratum fracture is too high, and the pressure is conducted to the stratum only through the inner sand blasting hole and the outer sand blasting hole; the stress concentration effect of the inner and outer sand blasting holes is utilized, a crack initiation point is manufactured in the stratum, and conditions are created for fracturing the stratum.