79 results about "Control valves" patented technology

A fluid flow rate control method is provided that uses a flow rate range variable type pressure type flow rate control device provided with at least two or more parallel fluid passages disposed between the downstream side of a control valve of the control device and a fluid supply pipe passage, and orifices having different fluid flow rate characteristics are respectively interposed in parallel fluid passages to pass fluid in a first flow rate region through one orifice for flow rate control, and to pass fluid in a second flow rate region through at least another orifice for flow rate control. Flow rate characteristics of the respective orifices are selected so that a maximum controllable flow rate of fluid in the first flow rate region at low flow rate is smaller than 10% of a maximum controllable flow rate in the second flow rate region at high flow rate.

The invention relates to a telescopic control valve, a multi-stage telescopic hydraulic system and a hoist jib telescopic hydraulic control system. The telescopic control valve comprises a valve body, wherein a first oil port and at least two second oil ports are formed in the valve body, oil passing ways are connected between the first oil port and the at least two second oil ports, on-off valves are arranged on all the oil passing ways, a control oil port of each on-off valve is connected with a control oil source by the aid of a reversing valve, selection of all the on-off valves can be realized through reversing by the reversing valves, and then the oil passing ways are connected or disconnected. The telescopic control valve is provided with the first oil port, the second oil ports, the reversing valves and the on-off valves, and the different oil passing ways can be connected or disconnected through reversing by the reversing valves. For a multi-stage telescopic hydraulic system, a cylinder rod corresponding to one selected oil way can be controlled to extend or retract, and other oil ways are cut off, so that action of the cylinder rod cannot be affected, and independent control on each stage of cylinder barrel is realized.

The invention discloses a dual negative pressure adjustable wound negative pressure therapeutic instrument based on a microprocessor core, comprising an internal negative pressure source, an internal negative pressure control unit, an external negative pressure interface, a regulating valve, an external negative pressure control unit, a wound Drainage device, negative pressure detection unit, flow rate and flow rate detection unit and alarm unit; internal negative pressure control unit and external negative pressure control unit respectively control internal negative pressure source and external negative pressure source to generate negative pressure at the wound, wound drainage device The generated lactic acid metabolites are drained, the negative pressure detection unit detects the pressure at the wound, the flow and velocity detection unit detects the drainage volume and drainage speed at the wound, and the detected signal is fed back to the internal negative pressure control unit or external negative pressure control unit , the control unit controls the negative pressure source according to the feedback signal; when the wound causes massive bleeding, the alarm unit sends out an alarm signal. The present invention can use a negative pressure pump or a hospital negative pressure system as a negative pressure source, which can be flexibly selected in practical applications.

The invention discloses an electric static liquid actuator for deep sea. An integrated-type integrated structure is adopted. The movement of a hydraulic cylinder is controlled by a two-way hydraulic pump. The forward and reverse of a motor is adjusted and controlled, and the displacement and accelerated speed of a piston rod of the hydraulic cylinder are controlled through speed regulation operation; and a hydraulic direction-changing valve, a reducing valve and other control valves are cancelled, and an arranged sensor monitors and adjusts the working condition of a system. A pressure compensator is arranged outside the system and used for compensating system pressure and adapting high pressure environment of the deep sea. A hydraulic circuit adopts a plate-type connection without external connection pipelines, only an interface for power supply and signal transmission is arranged on the exterior of the hydraulic circuit, the advantages of a hydraulic actuating system and an electricactuating system are both had, system composition is simplified greatly, and the equipment volume is greatly reduced. Therefore, the electric static liquid actuator for the deep sea has a wide application prospect in deep-sea operating equipment and shipping equipment.

The invention relates to a multi-functional constant flow control valve used for flow adjustment and automatic control. The multi-functional constant flow control valve includes a valve body which is provided with a valve cover at the upper portion and a sewage draining exit at the lower portion. The valve cover is provided with a valve shaft at the center. The valve shaft is provided with an adjusting valve clack at the lower portion. A valve pocket, a differential pressure receptor and a bi-seat valve clack with a function of compensating the differential pressure are arranged inside the valve body. The valve pocket, the differential pressure receptor and the bi-seat valve clack with the function of compensating the differential pressure constitute a valve core. Compared with the prior art, the multi-functional constant flow control valve is more reasonable and compact in structure, simple in disassemble and maintenance, visual in flow display, and abundant in function, thus being applicable to more fields.

The invention relates to a full automatic extraction device, which is used for extraction experiment in a chemical laboratory. The device comprises a shell, a getter device, an extraction container and a tap funnel which are fixedly arranged on the shell, wherein the tap funnel is positioned on the upper part of the extraction container; the extraction container is communicated with the getter device through an air duct and connected positions are all closed; the bottom end of the extraction container is provided with an imbibition long tube; the imbibition long tube passes through an opening on the top part of the tap funnel to the bottom of the tap funnel; the bottom of the tap funnel is provided with a drain pipe; the drain pipe is provided with a control valve; and the getter device is arranged in the shell, an outlet of the getter device is connected with a vent pipe, and the vent pipe extends outside the shell. The device adopts batch type vacuumizing principle, guides organic phase and aqueous phase to come and go rapidly in the extraction container and the tap funnel so as to make a target compound sufficiently transfer from the aqueous phase to the organic phase, thereby realizing liquid-liquid extraction and separation. The device can replace manual operation and save time and labor, and has good uniformity, an experimenter cannot breathe harmful gas, so the device is favorable for protecting human body from harm.

The invention relates to the technical field of low temperature measurement, and especially relates to a method and device for quickly decreasing temperature. The method comprises the steps: enabling a cold head and a temperature control object to be separated through a thermal resistor device, employing the cold head of a refrigerating machine for accumulation of cold, thereby achieving the big temperature difference between the cold head and the temperature control object, achieving the cooling speed which is higher than the cooling speed which is achieved through the cooling capability of the refrigerating machine, and achieving the quick decreasing of temperature. During the quick decreasing of the temperature, the fine tuning is carried out through a heating device, thereby achieving the temperature decreasing at a constant speed. The invention proposes a method for achieving the temperature decreasing at the constant speed through employing the refrigerating machine. Compared with a liquid helium system, the system is simple in structure, and reduces a plurality of control valves and pipes. The system is low in cost, and has no other cost except some power supply needed in a process. Moreover, the system flexibly changes the cooling speed through controlling the start/stop of the refrigerating machine and the heating device, is stable, reliable and controllable in cooling speed, and can achieve the automatic control. The system is very good in linearity of temperature increase and decrease. Compared with the liquid helium system, the system is stable in temperature increase and decrease speed.

The invention discloses a variable-pitch hydraulic transmission wind turbine. The wind turbine comprises a wind energy acquirer and a variable pump coaxially connected; the variable pump is provided with a variable pump control unit; the variable pump communicates with a hydraulic energy storer, an oil supply system, a high-pressure pressure gauge, a high-pressure pressure sensor and a pilot electric-hydraulic proportional control valve through a one-way valve at the same time; the pilot electric-hydraulic proportional control valve is connected with a permanent magnet synchronous generator through a variable motor; the variable motor is provided with a variable motor control unit; the variable pump communicates with an inlet oil filter; the variable motor communicates with an outlet oil filter; the inlet oil filter communicates with a low-pressure pressure gauge, a low-pressure pressure sensor, an overflow valve and the outlet oil filter at the same time; the overflow valve also communicates with a hydraulic oil tank; and a one-way valve communicates between an outlet end of the one-way valve and an inlet end of the inlet oil filter. The invention further discloses a control method of the variable-pitch hydraulic transmission wind turbine. The device and the method are reliable in work.

The invention provides an ultrahigh-pressure hydrogen electromagnetic valve having a pressure relief function and applied to a vehicle. The ultrahigh-pressure hydrogen electromagnetic valve comprisesa valve body; the valve body is provided with a gas charging interface which is connected with a gas cylinder; the valve body is internally provided with a main gas charging channel and the gas charging interface; the valve body is also internally provided with a manual control valve interface, an electromagnetic valve interface and a pressure reducer interface; one side of the pressure reducer interface is provided with a low pressure output interface; a manual control valve is installed at the manual control valve interface; an electromagnetic valve is installed at the electromagnetic valveinterface; a pressure reducer is installed at the pressure reducer interface; the gas charging interface communicates with the main gas charging channel through the manual control valve; and the maingas charging channel communicates with the low pressure output interface through the manual control valve, the electromagnetic valve and the pressure reducer in sequence. The ultrahigh-pressure hydrogen electromagnetic valve provided by the invention has the advantages of reasonable structure, high integration level, good safety and long service life.

The invention relates to a cement-soil mixing pile device and an operation method of the cement-soil mixing pile device. The cement-soil mixing pile device is reconstructed and optimized on the basis of an original cement-soil mixing pile machine and comprises a hold hoop, a blade, a drilling rod, a drilling head, an upper slurry spraying opening, a lower slurry spraying opening, an air control valve, a slurry inlet pipe I, a slurry inlet pipe II and a slurry inlet pipe III, wherein the slurry inlet pipe I, the slurry inlet pipe II and the slurry inlet pipe III are communicated to the lower slurry spraying opening, an inner hole of the drilling rod is directly communicated with the upper slurry spraying opening, a water inlet slurry opening of the air control valve is communicated with the slurry inlet pipe I when the drilling rod drills downwards and is communicated with the lower slurry spraying opening by the slurry inlet pipe II and the slurry inlet pipe III in sequence, the water inlet slurry opening of the air control valve is communicated with the inner hole of the drilling rod when the drilling rod is lifted, and the upper slurry spraying opening is used for spraying slurry. Compared with the prior art, the cement-soil mixing pile device and the operation method of the cement-soil mixing pile device, disclosed by the invention, have the advantages that the mixing is uniform, the mixing efficiency is high, the cost is low, the efficiency is high, the working period is shortened, and the like.

The gas exchange valve arrangement for a piston engine (1) comprises a fluid chamber (52), into which chamber (52) hydraulic fluid can be introduced during cam-controlled opening of a gas exchange valve (3). A control valve (10) is used for restricting outflow from the fluid chamber (52) for delaying or slowing down the closing movement of the gas exchange valve (3). The control valve (10) comprises a valve member (13) having at least a first position, in which position maximum flow through the control valve (10) is allowed, a second position, in which position the flow through the control valve (10) is throttled, and a third position, in which position flow through the control valve (10) is prevented.

The present invention discloses a pneumatic nail gun, which comprises a nail tool body, a cylinder seat arranged above the nail tool body, a housing cap arranged at top end of the cylinder seat; a seal gasket is arranged inside top of the housing cap; a head valve is arranged inside the housing cap, and a spring is disposed inside the head valve; a collar is actively arranged inside the cylinder seat, a cylinder being disposed inside the cavity of the tool body; the collar can move reciprocally along a space formed between the cylinder seat and the inner step surface of the cylinder; a control valve assembly is arranged along a radical direction of the cylinder seat; a piston driver assembly is actively arranged inside a chamber being formed by an inner hole of the collar and an inner hole of the cylinder. The pneumatic nail gun can reduce the pressure oscillation when firing, increase the effectiveness of the firing for every time.

The invention relates to an efficient and energy-saving BOG (boil-off gas) recycling device which comprises a nitrogen gas storage tank, a first control valve, a nitrogen gas compressor, a nitrogen gas water cooler, a water tank, a pump, a second control valve, an expander, a third control valve, a heat exchanger I, a fourth control valve, a fifth control valve, a sixth control valve, a heat exchanger II, a seventh control valve, an eighth control valve, an LNG (liquefied natural gas) storage bottle, a weigher and a ninth control valve. According to the efficient and energy-saving BOG recycling device, a common oil-free nitrogen gas compressor and a turbo expander are adopted, low-temperature nitrogen is adopted as a heat transfer medium to exchange heat with BOG and liquefy the BOG; and dependence, on an aboard BOG compressor, of a current BOG recycling device is avoided, and therefore, the efficient and energy-saving BOG recycling device has the advantages of being safe, energy-saving, efficient and environmentally-friendly.

An automatic transmission (1) is provided. One embodiment of the automatic transmission may include a valve body (42-44) including control valves for hydraulically controlling a friction engaging element provided within said transmission; an electric control unit (25) located on said valve body (44) for controlling gear shifting of said automatic transmission; a peripheral wall (51) surrounding a transmission case (6) of the gear shift mechanism, and an outer wall (52) of the transmission case (6) provided adjacent to said peripheral wall (51), and a containing space (53) formed by the peripheral wall (51), said outer wall (52) and said valve body (44); wherein said electric control unit (25) is located within a containing space (53). Adopting said structure, the electric control unit is provided at the position not easily damaged by high temperature fluid in the transmission case.

There is provided an operation control structure for a continuity test device for performing lock of a connector and actuation of a continuity test part timely, low cost, easily, and surely including a connector attachment part 3, a continuity test part 4 having a probe pin 12, a first cylinder 16 for locking a connector 10 in the connector attachment part, a second cylinder 15 for moving the continuity test part to the connector attachment part, wherein plugs 30 and 54 of the first cylinder and the second cylinder respectively are supplied with the same pressured air, a speed control valve 26 being provided within a plug 30 of the second cylinder 15, a fine hole 28 thinner than a hole 56 in a plug 54 of the first cylinder being provided in the speed control valve, and wherein the continuity test part is actuated by the second cylinder through the fine hole following lock of the connector by the first cylinder. A hole 37 for air discharge is provided in the speed control valve 26 is connected to a hole 31 of the plug via a gap 38 between the outer circumference of the speed control valve and the inner circumference of the plug 30 of the second cylinder 15, and wherein a test valve 36 is provided in the gap.

A fuel injector for an internal combustion engine includes an injector body in which there are positioned an actuator, a control valve, and a needle guide. The actuator actuates the control valve, the control valve controlling an injection needle sliding the needle guide between an open position in which injection is permitted and a closed position in which the injection of fuel is prevented. The injector additionally includes a first electrical connection extending from the needle guide to a metal that are internal to the injector, and a metal extension extending from the metal ring to a connector pin accessible from the outside of the injector, so that an electrical signal indicative of the position of the needle can be transmitted from the needle guide for the needle to the connector pin.

The invention provides a hydraulically controlled frequency stabilization power generating method, which comprises the following steps that: a. an impeller collects flow field energy and the flow field energy is converted into mechanical energy; b. the mechanical energy is transmitted to a parallel-connection pump unit with variable initial phase angles by a power distribution box to be converted into hydraulic energy, and the hydraulic energy is transmitted to a variable hydraulic motor through a current collector; c. a constant speed controller cooperates with a control valve group in a control loop and an electric control variable mechanism in the hydraulic motor to obtain flow entering the hydraulic motor and the optimal matching of displacement of the hydraulic motor, so that the hydraulic motor rotates at constant speed and outputs the mechanical energy, and the mechanical energy is transferred to a generator; and d. the constant-speed stable mechanical energy is converted into constant frequency electrical energy to be output by the generator. The invention adopts a closed hydraulic loop to realize the conversion and long distance transfer of flow field energy, solves the problems that the existing wind power generating device has high cost, difficult constant frequency and voltage regulation, difficult installation and maintenance and the like, and can effectively reduce the construction and operation and maintenance costs of wind power generating equipment.

The invention belongs to the technical field of testing moving parts such as a membrane and the like, and more particularly discloses a multifunctional membrane testing device which comprises a test bench component, an electric control cabinet component and a pneumatic component; wherein, the electric control cabinet component comprises a power supply, a programmable controller (PLC) connected with the power supply and two intermittent on-off selective control valves which are respectively and correspondingly connected on two pins of the PLC; the pneumatic component comprises a high pressure air source, a moisture separator and two airflow branches formed by respectively connecting the moisture separator with the two selective control valves, wherein, one of the airflow branches is communicated with a positive pressure gas discharge pipe, and the other one is connected with a negative pressure generator and a negative pressure gas discharge pipe and communicated with the parts to be tested, so that negative pressure is formed for testing the parts to be tested by vacuum-pumping. The testing device can accurately control the negative pressure applied on the objects to be tested, meet the strain resistance and corrosion resistance tests of dynamic and static rubber mebranes, and accurately control the frequency, time and count of the movement of the mebrane without needing a person specially assigned for monitoring, thereby improving the working efficiency of the test and greatly reducing the energy consumption.

The invention belongs to the field of domestic sewage treatment, and particularly relates to an ozone-assisted photocatalytic sterilization device, which comprises an ozone generation system, a first control valve, a gas flow meter, a filter, a liquid flow meter, a second control valve, a jet flow mixing device and a photocatalytic reactor, wherein the ozone generation system is connected with the gas flow meter through the first control valve; the filter is connected with the liquid flow meter through the second control valve; the jet flow mixing device is provided with a gas inlet, a liquid inlet and an outlet; the gas flow meter is connected with the gas inlet of the jet flow mixing device; the liquid flow meter is connected with the liquid inlet of the jet flow mixing device; the outlet of the jet flow mixing device is connected with the photocatalytic reactor. The device has the beneficial effects that a process flow is simple, the device is easy to operate, and has good sterilization and disinfection effects, and the treatment cost is effectively lowered.

The invention provides a pearl cleaning and drying device, which belongs to the field of pearl processing. Including the body; the left side of the body is fixed with a feed inlet, and the upper part of the feed inlet is funnel-shaped, and the lower part is a rectangular parallelepiped tube; the front plate and the bottom of the rear plate of the body are pierced with several horizontally arranged rollers; the The two ends of the central shaft of the roller are connected to the bearing seat, and the bearing seat is fixed on the bottom of the outer surface of the front plate and the rear plate of the machine body; the front end of the bearing seat of the front plate of the machine body is fixedly connected with a rotating motor; There are four support rods fixed vertically; the top of the support rod is fixed with a spring shock absorber; the upper end of the spring shock absorber is fixed with a water pump; the material control valve of the present invention is used to control the flow rate of pearl particles falling The deceleration plate facilitates the slow and uniform falling of pearl particles; the roller facilitates the rolling of pearl particles; the bearing seat facilitates the rotation of the roller; the rotating hinge facilitates fine adjustment of the spraying direction of the sprinkler head;