4107results about "Piston pumps" patented technology

A pump system includes a housing defining a first internal volume and a second internal volume, a first piston positioned to separate the first internal volume into a first chamber and a second chamber, a second piston positioned to separate the second internal volume into a third chamber and a fourth chamber, a first inlet check valve configured to permit fluid flow into the first chamber, a second inlet check valve configured to permit fluid flow into the third chamber, a directional control valve (DCV) repositionable between (a) a first position where the DCV is configured to fluidly couple the second chamber to a high pressure fluid source and (b) a second position where the DCV is configured to fluidly couple the fourth chamber to the high pressure fluid source, and a relief valve configured to supply a fluid to the DCV through an orifice to move the DCV.

The present invention provides a composite multi-compression mechanism vacuum pump with a high compression ratio and high pumping speed. The multi-compression mechanism includes three types: a turbine, a traction wheel, and a vortex blade array. The traction wheel is divided into a first-stage traction wheel and a second-stage traction wheel. A first-stage exhaust port and a second-stage exhaust port are respectively provided on the base, and a valve is provided on the first-stage exhaust port. In the first pumping stage, the valve is opened, and most of the gas flows through the turbine and the first-stage traction wheel and is discharged from the first-stage exhaust port. A small part of the gas flows through the turbine, the first-stage traction wheel, the second-stage traction wheel, and the vortex blade array in sequence and is discharged from the second-stage exhaust port. In the second pumping stage, the valve is closed, and the gas flows through the turbine, the first-stage traction wheel, the second-stage traction wheel, and the vortex blade array and is discharged from the second-stage exhaust port. The present invention solves the problem that high pumping speed and high vacuum cannot be achieved at the same time and that the molecular pump must be equipped with a pre-stage pump by using multiple compression mechanisms in series. The present invention can replace a traditional set of multiple vacuum pumps with a single vacuum pump, significantly reducing costs.

Systems and methods are provided for a portable air compressor comprising an electric battery, an electric motor, a piston, and an air hose. The electric motor is powered by the electric battery. The piston is coupled to and driven by the electric motor. The piston is configured to compress air within a piston cylinder. The air hose has a first end attachable to an air outlet of the piston cylinder and a second end attachable to an inflatable object. The portable air pump is configured to inflate the inflatable object to a target air pressure. When the target air pressure is below a predetermined pressure threshold, the portable air pump inflates the inflatable object at a first inflation rate. When the target air pressure is above the predetermined pressure threshold, the portable air pump inflates the inflatable object at a second inflation rate greater than the first inflation rate.

The invention discloses an antifouling self-cleaning line column type porcelain insulator and a detection method thereof, and relates to the field of insulators, a connecting bin is provided with a positioning rotating member, two ends of a movable sleeve block are provided with one-way drawing units connected with a piston rod, and a gas storage bin is provided with a rotating exhaust member. By arranging a position adjusting rotating part, a rotating exhaust part and a one-way pulling unit, when wind blows a fan blade plate, a reversing bevel gear can drive a transmission shaft to rotate clockwise so as to enable a reciprocating lead screw to rotate clockwise, and when a transmission gear ring rotates anticlockwise, the reversing bevel gear drives the transmission shaft to rotate clockwise so as to enable the reciprocating lead screw to rotate anticlockwise so as to enable the reciprocating lead screw to rotate anticlockwise. Therefore, when the second pawl rotates, the reciprocating screw rod rotates clockwise all the time, one-way rotation of the reciprocating screw rod can be achieved, then the rotating exhaust part and the one-way pulling unit are matched, the surface of the insulator body can be cleaned through airflow, and the self-cleaning effect is achieved.

The invention relates to the technical field of power electronic driving control, in particular to a driving system and method for an ultrasonic air pump, and the system comprises a control signal generation module which is used for generating a control signal; the voltage superposition driving module is coupled to the control signal generation module and is used for superposing and lifting the driving voltage according to the control signal and executing reversing operation, and the reversing operation comprises forward driving and reverse driving; the driving frequency adjusting module is coupled to the control signal generating module and is used for adjusting the driving frequency and speed of the ultrasonic air pump based on the control signal; and the working circuit protection module is coupled to the voltage superposition driving module and is used for setting dead time between forward driving and reverse driving to prevent short circuit. According to the invention, the dependence of the ultrasonic air pump on an independent high-voltage power supply and how to realize high-voltage alternating driving through voltage superposition and avoid the risk of bridge arm direct connection and resonance mismatch under the constraint of a low-voltage power supply are effectively solved.

The invention discloses an offshore multi-energy combined supply system based on constant-pressure compressed carbon dioxide energy storage and an operation method of the offshore multi-energy combined supply system. The system comprises a working medium storage device, a heat energy storage device, a charging process module, a gas-liquid conversion loop, a discharging process module, a cold energy supply module and a heat energy supply module. By improving the energy release process structure of the compressed carbon dioxide energy storage system, the pressure of high-pressure carbon dioxide is reduced to normal pressure after primary expansion, so that low-temperature cold energy is generated while power is generated, consumption of stored heat is saved, residual stored heat is used for heat supply, the comprehensive utilization rate of energy is increased, and combined supply of cooling, heating and power is achieved; the system further comprises an integrated thermally-driven combined cooling and power supply subsystem capable of switching power generation / refrigeration modes, organic Rankine cycle and jet refrigeration cycle are highly integrated, investment cost and space occupation are reduced, redundant heat energy is flexibly and efficiently converted into electric energy or cold energy, and the flexibility of multi-energy combined supply of the system is improved.

The invention belongs to the technical field of oil and gas exploitation and pressurized transportation, and discloses a lead screw driven rodless reciprocating type single-action electric submersible pump and a control method. The electric pump is characterized in that a working cavity is formed between a plunger and an upper working cavity end cover, and a lower cavity is formed between the plunger and a lower cavity end cover; the plunger does reciprocating motion in the working cavity to finish suction and discharge of liquid; the lower working cavity end cover is installed at the bottom of the cylinder body, and a lead screw is fixed to the lower working cavity end cover and connected with the plunger. The lead screw is connected with a motor. The plunger is driven by the lead screw to reciprocate in the cylinder body, and suction and discharge of liquid and control and continuous conveying of liquid in a working cavity are sequentially completed in the up-down stroke of the plunger by means of one-way opening and closing of the liquid inlet valve and the liquid discharge valve. The lead screw driving rodless reciprocating type single-action electric submersible pump is higher in efficiency under the complex well condition. The optimized reciprocating type driving mechanism can achieve efficient one-way conveying, the sealing design can prolong the service life of equipment, and the maintenance cost is reduced.

The invention relates to the technical field of transmission pumps, and discloses a cam transmission pump. The cam transmission pump comprises a plunger assembly and a first driving assembly, and the plunger assembly is provided with a plunger rod reciprocating in the first direction; the first driving assembly comprises a first driving part and a cam, the first driving part is in driving connection with the cam and can drive the cam to rotate, the end of the plunger rod is slidably connected to the outer contour of the cam, the outer contour of the cam comprises an acting section and a reset section which are connected end to end, and the acting section is used for driving the plunger rod to move in the direction away from the cam. The reset section is used for driving the plunger rod to move in the direction close to the cam, and the radian of the acting section is larger than that of the reset section. Due to the fact that the radian of the acting section is larger than that of the reset section, the acting duty ratio of the cam is larger than 50%, and the energy utilization rate is improved. Through cam transmission, rotary driving of the first driving piece is converted into linear reciprocating motion of the plunger rod, and the duty ratio of acting is increased.

The utility model relates to the technical field of pneumatic control, solves the problem that in the prior art, work of a double-air-source pneumatic pump needs to completely depend on a power source, and discloses an automatic air source switching device and a double-air-source pneumatic pump control system.The automatic air source switching device comprises a pump air source control device, and the pump air source control device comprises a first valve body and a second valve body; the pneumatic timing device comprises a driving shaft and a driven shaft, a driving blade is installed at one end of the driving shaft, an air injection device is arranged on one side of the driving blade, airflow or compressed air provided by an air source is used for driving a pneumatic timer, and then the pneumatic timer is used for driving position switching of the first valve element and the second valve element. The purpose of regularly switching the driving air sources of the double-air-source pneumatic pump is achieved, so that the purpose of regularly switching the driving air sources of the double-air-source pneumatic pump can be achieved under the condition that power is not supplied through a power source.

The invention belongs to the field of vacuum pumps, and provides a vacuum pump and application thereof in refrigerators.The vacuum pump comprises a pump body, the pump body is composed of a bottom cover, a middle cover and an end cover, the middle cover is located between the bottom cover and the end cover, a motor is arranged on the side, away from the middle cover, of the bottom cover, and an output shaft of the motor extends to the inner side of the bottom cover to be connected with an eccentric wheel; the outer edge of the eccentric wheel is in contact with a leather cup support slidably connected with the bottom cover, and a guide hole is formed in the middle of the leather cup support. A leather cup and a steel needle linkage mechanism are adopted to replace an electromagnetic valve, a motor drives an eccentric wheel to drive a leather cup support to do reciprocating motion, a pull cup is pulled to do reciprocating deformation in the motion process, reciprocating air exhaust is conducted by changing the size of the space of a pump body cavity, working noise is effectively controlled, and meanwhile the air exhaust speed is increased; and compared with a traditional electromagnetic valve, the volume of the low-oxygen fresh-keeping electromagnetic valve is effectively reduced, and the space utilization rate in the working process is improved.

The utility model discloses a gas loss detection device and a compressor, and aims to solve the technical problems that the detection of the hydrogen leakage rate of the compressor is inaccurate, and leaked hydrogen is not recycled. The gas loss detection device comprises a recovery pipeline, a compression detection mechanism, a pneumatic control valve and a high-pressure separator are arranged on the recovery pipeline, the compression detection mechanism is communicated with an isolation cavity of a compressor, and hydrogen in the isolation cavity enters a hydrogen buffer tank of the compression detection mechanism to be stored and compressed; after being purified by the high-pressure separator, the hydrogen enters a gas inlet pipeline of the compressor to be reused, so that the waste of hydrogen is avoided and the cost is reduced; and a pressure gauge of the compression detection mechanism detects the pressure of the buffer tank, records the relationship between pressure change and time at a control end, and calculates the leakage rate of the compressor so as to judge the sealing performance of the compressor cylinder.

The invention discloses a pulse-free hydraulic reciprocating fluid material conveying pump which comprises a pump body, a pulse adjusting assembly and a reversing valve. The pump body is connected with the two slurry cylinders, and slurry suction and discharge ports of the slurry cylinders are connected with the slurry suction and discharge valve assembly; a slurry suction port of the slurry suction and discharge valve assembly is connected with the main liquid inlet pipeline, and a slurry discharge port of the slurry suction and discharge valve assembly is connected with the main liquid discharge pipeline; a pulse adjusting assembly is arranged between the oil inlet pipe and the main liquid discharging pipeline, slurry discharging compensation is provided by arranging the pulse adjusting assembly when the oil cylinder is at a reversing point of reciprocating motion, the stability of the slurry discharging flow is guaranteed, and under the condition that a pressure reducing valve is arranged, blockage removing can be conducted on the slurry discharging pipeline by adjusting the pressure reducing valve to be normal and increasing the pressure in the slurry discharging pipeline.

An electrical feedthrough includes a base body with a sealing region, at least one opening and an electrical conductor fed through the opening, wherein the conductor is held in the opening by a fixing material and the fixing material seals the opening. The edges which surround the opening are designed to be sharp and all edges of an outer contour of the base body are provided with a chamfer or a rounding, which has a size or a radius r in the range of 0.3 mm to 2 mm.

A trigger-type liquid ejector including an ejector main body and a nozzle member. The ejector main body includes: a longitudinal supply tube portion; a trigger mechanism including a trigger portion; a reservoir cylinder; a reservoir plunger; and a reservoir valve. The longitudinal supply tube portion includes an outer tube and an inner tube. A recovery passage is provided between the outer tube and the inner tube. The reservoir valve is provided in the inner tube and configured to allow supply of a liquid from the longitudinal supply tube portion into the reservoir cylinder by being elastically deformed in the vertical direction.

A light-weight gas compressor convenient to move relates to the field of gas compressors, and is characterized in that three forward cylinders and three reverse cylinders which are arranged in a staggered manner are uniformly fixed on the outer edge surface of an annular plate; the forward air cylinder B is connected with the reverse air cylinder A, the reverse air cylinder A is connected with the forward air cylinder A, the forward air cylinder A is connected with the reverse air cylinder B, the reverse air cylinder B is connected with the forward air cylinder C, the forward air cylinder C is connected with the reverse air cylinder C, and the reverse air cylinder C is connected with an exhaust pipe; the power of the double-end piston rod hydraulic oil cylinder is provided by an oil supply hydraulic oil cylinder A and an oil supply hydraulic oil cylinder B; the double-end piston rod hydraulic oil cylinder arranged in the annular plate is used for controlling the three reverse air cylinders and the three forward air cylinders to achieve gas compression, and the purpose of gas compression which is light in weight and convenient to move is achieved.

A valve structure A of an accumulator sprayer X provided with a cylinder body portion B having a main cylinder portion B1 and a sub-cylinder portion B2, and a cover portion C that is attached to cover the cylinder body portion B, wherein; the accumulator sprayer X sucks up liquid in a container J through a first valve FV to the main cylinder portion B1, pressurizes the liquid and spraying the liquid from a nozzle portion F when the pressure of the liquid reaches a certain pressure; and the valve structure A comprises a spring portion and a valve piston portion, wherein the valve piston portion is provided with a spring attaching portion, the spring portion is attached to the spring attaching portion, the spring portion presses the valve piston portion in vertical direction, and the spring portion has higher rigidity than the valve piston portion.

The invention relates to a plunger pump system, a control method and a filter press. The plunger pump system comprises an oil storage container, an oil pump device, a plunger device and a hydraulic device. The hydraulic device comprises two hydraulic assemblies, each hydraulic assembly comprises an oil cylinder and a piston, the piston divides the oil cylinder into a rod cavity and a rodless cavity, and the rod cavities of the two hydraulic assemblies or the rodless cavities of the two hydraulic assemblies are communicated with each other. The oil pump device and the hydraulic device are connected through an oil supply pipeline, a liquid flow reversing device and a one-way valve are connected to the oil supply pipeline, the flow direction of hydraulic oil in two branch pipelines of the oil supply pipeline is controlled by the liquid flow reversing device to be periodically switched, and the flow directions of the hydraulic oil in the branch pipelines are opposite at the same moment. One end of the electric control overflow device is connected between an oil pump device and a one-way valve, the other end of the electric control overflow device is connected with an oil storage container, and the electric control overflow device is controlled to conduct an oil outlet of the oil pump device and the oil storage container during reversing of the liquid flow reversing device and discharge impact of hydraulic oil reversing on the plunger pump system.

The invention discloses a high-pressure combustion combined heat and power generation energy storage system and method for hydrogen and oxygen production through electrolysis, and relates to the field of hydrogen energy storage. After the electrolytic cell produces high-pressure hydrogen and oxygen, the high-pressure hydrogen and oxygen are stored in the hydrogen / oxygen storage tank, the system can operate in a hydrogen / oxygen mode, and in the oxygen mode operation, the hydrogen and oxygen steam mixed gas from the oxygen storage tank and the hydrogen / oxygen evaporation compressor are combusted in the high-pressure combustion chamber to generate superheated steam, and then the superheated steam enters the expansion turbine to do work; due to excessive oxygen, dead steam after acting is separated into two working media through a gas-liquid separator, that is, gas enters a cooler to be cooled and then returns to a combustion chamber through a hydrogen / oxygen evaporation compressor, drainage water generated after liquid enters a heat supply heat exchanger is pressurized through a water pump and then enters a high-temperature combustion chamber, and therefore clean utilization of hydrogen energy and cyclic regeneration of the working media are achieved. The system can realize high power generation efficiency and excellent environmental protection performance, and is suitable for regions requiring stable consumption of fluctuating renewable energy sources, power and heat supply and the like.

The reciprocating compressor comprises a compressor frame, a crankshaft and a connecting rod, connecting the crankshaft to a crosshead. A piston rod connects a piston to the crosshead. The piston reciprocates in a gas compression cylinder. At least one pressure-drop module is positioned between the gas compression cylinder and a crosspiece guide. The piston rod extends from the gas compression cylinder through a pressure-drop chamber of the pressure-drop module. Also disclosed herein is a method of operating a reciprocating compressor.

The invention discloses a grouting filling pump, and belongs to the technical field of grouting pumps, the grouting filling pump comprises at least four oil cylinder valve groups and pistons with moving strokes in the oil cylinder valve groups, and the pistons in the oil cylinder valve groups have a propelling state, a retreating state and a transition state between the propelling state and the retreating state; at any moment, at least two pistons are in a propelling state and a returning state respectively; the lifting valve is communicated with the oil cylinder valve groups, and the lifting valve controls opening and closing of a valve seat of the lifting valve through a valve clack. In the oil cylinder valve group, each piston is continuously switched in three stroke states, and at any moment, pistons distributed in different states, particularly pistons distributed in a propelling state and a returning state, exist in the whole oil cylinder valve group system, so that a slurry feeding action and a slurry discharging action exist in the whole pumping system at each moment; and the continuity of the slurry feeding and grouting process of the lifting valve can be ensured.

A foam dispenser having a foam generator that is moveable within a foam generation chamber, and a pump mechanism that generates a positive pressure differential across the foam generation chamber during a discharge phase and a negative pressure differential across the foam generation chamber during a resupply phase. During the discharge phase, the positive pressure differential forces the foam generator into a first position, and forces foamable liquid and air to pass through the foam generator to generate foam. During the resupply phase, the negative pressure differential forces the foam generator into a second position, and atmospheric air is drawn into the foam dispenser without passing through the foam generator.

Hydraulic fluid release valve assemblies are described herein. The hydraulic fluid release valve assemblies may include a hydraulic unit base with a hydraulic fluid return channel and a hydraulic fluid release valve that is at least partially inserted in the hydraulic fluid return channel. The hydraulic fluid release valve assembly may further include a driving assembly to contact with the hydraulic fluid release valve to apply a pushing force on the hydraulic release valve to open the hydraulic fluid release valve, and an electrically powered driver connected to the driving assembly, the electrically powered driver, when actuated, causes the driving assembly to move to apply the pushing force to the hydraulic fluid release valve.

A system and method for operating a fleet of pumps for a turbine driven fracturing pump system used in hydraulic fracturing is disclosed. A method of operating a fleet of pumps associated with a hydraulic fracturing system includes receiving a demand Hydraulic Horse Power (HHP) signal. The demand HHP signal may include the Horse Power (HP) required for the hydraulic fracturing system to operate and may include consideration for frictional and other losses. The method further includes operating all available pump units at a percentage of rating below Maximum Continuous Power (MCP) level, based on the demand HHP signal. Furthermore, the method may include receiving a signal for loss of power from one or more pump units. The method further includes operating one or more units at MCP level and operating one or more units at Maximum Intermittent Power (MIP) level to meet the demand HHP signal.

The invention provides a rotor assembly, which comprises a rotor iron core and a baffle assembly, and is characterized in that the rotor iron core is provided with a circulation channel which extends along the radial direction and is used for circulation of a refrigerant medium; the rotor iron core is provided with two opposite ends extending in the axial direction, the baffle assembly is arranged at the end of the iron core, and at least part of the baffle assembly is movably arranged to avoid the circulation channel or shield at least part of the port of the circulation channel so as to adjust the circulation cross-sectional area of the port of the circulation channel. According to the technical scheme, the dynamic cooperative relation between the rotor core and the baffle assembly is constructed, so that at least part of the baffle assembly can selectively shield the end of the circulation channel of the rotor core, and the technical problem that in the prior art, the rotor assembly cannot adjust the flow of the circulation channel, and then the energy efficiency of the air conditioner is affected is solved.

Provided is a power generation system and method based on compressed air energy storage technology through solar auxiliary hot humid air. The system comprises an energy storage subsystem, a solar heat storage subsystem, and a turbine generator subsystem which are connected in sequence. The energy storage subsystem includes a motor, a compressor, and an air storage tank which are connected in sequence. The solar heat storage subsystem includes a solar heat collector and a solar heat exchanger. The solar heat collector and the solar heat exchanger are connected through a heat transfer oil circulation loop. The system compresses and stores compressed air using the electricity of the power grid when an electrical load is within a low valley, releases the compressed air when the electrical load is within a peak, and heats and humidifies the air before entering the turbine using the recovered compression heat and solar energy.

The invention discloses a hydraulic drive type piston compressor which comprises a hydraulic oil cylinder. The first air cylinder and the second air cylinder are oppositely arranged at the first end and the second end of the hydraulic oil cylinder, the first air cylinder and the second air cylinder are each provided with a buffer displacement sensor and a limit displacement sensor, and each limit displacement sensor is located between the hydraulic oil cylinder and the buffer displacement sensor arranged on the air cylinder where the limit displacement sensor is located; the processor is configured to control the moving speed of the piston to a target buffer speed under the condition that the piston moves towards the first air cylinder and a buffer displacement sensor arranged on the second air cylinder detects the end of the piston; and under the condition that the piston moves towards the first air cylinder and a limit displacement sensor arranged on the second air cylinder detects the end of the piston, the piston is adjusted to move reversely. According to the hydraulic drive type piston compressor, the risk that the piston collides with the cylinder can be reduced.

The present invention relates to an infusion pump assembly. A wearable infusion pump assembly includes a reusable housing assembly including a mechanical control assembly including a pump assembly, at least one shape memory actuator configured to actuate the pump assembly, and at least one valve assembly. The wearable infusion pump assembly also includes a disposable housing assembly including a reservoir for receiving an infusible fluid. A releasable engagement assembly is configured to releasably engage the reusable housing assembly with the disposable housing assembly. A switch assembly is configured to enable a pairing function of the infusion pump assembly.

A portable fluid tank system can include wireless control capabilities. The portable fluid tank system can include a fluid tank with an internal volume for fluid storage and a fluid actuation system for controlled fluid movement and pressurization. An electronics housing within the portable fluid tank system can accommodate a removable energy storage device, providing power to the actuation system. The portable fluid tank system can include a multi-state control interface, facilitating direct user interaction or remote operation via a wireless communication module. The module can receive and execute commands from a remote transmitting device, enabling remote activation and control of the fluid actuation system.

The invention discloses a control method for a photovoltaic energy storage system, and the method comprises the steps: selecting an operation mode, the operation mode comprises a first mode, and in the first mode, step 1, judging whether the power generation amount of a photovoltaic system is sufficient or not; 2, if the phase change material is sufficient, the photovoltaic system supplies power to the inverter compressor, the operation frequency of the inverter compressor is controlled, the inverter compressor is shut down until the phase change material in the photovoltaic energy storage system reaches the set temperature, and in the process, the battery is charged with surplus electricity; 3, if not, the operation frequency of the inverter compressor is controlled according to the photovoltaic generating capacity at the current moment and the preset temperature condition, and the inverter compressor is shut down until the phase-change material reaches the set temperature; 4, judging whether the photovoltaic generating capacity at the current moment meets the requirement that the inverter compressor operates at the lowest frequency of the standard working condition or not; and 5, if not, power is supplied to the inverter compressor through the battery and the photovoltaic system at the same time, and the inverter compressor is made to operate at the lowest frequency of the standard working condition and shut down until the phase change material reaches the set temperature or the voltage of the battery is lower than the set voltage value. The technical effect that the endurance of the energy storage system can be greatly prolonged while enough energy storage efficiency is guaranteed is achieved.

The embodiment of the utility model provides a miniature vacuum pump and a miniature vacuumizing device, the miniature vacuum pump comprises an air collection and exhaust chamber provided with an air inlet nozzle and an exhaust hole, a leather cup assembly, a driving motor and a vacuum breaking assembly, and the vacuum breaking assembly comprises an air inlet hole penetrating through the bottom wall of the air collection and exhaust chamber; the pressing plate is movably sleeved on the section of the output shaft in the collecting and exhausting chamber and correspondingly and movably covers the air inlet hole; the rotating seat is coaxially and fixedly assembled on the output shaft and located on the side, away from the bottom wall, of the pressing plate, and a pivoting frame is arranged on the outer side face of the rotating seat in a protruding mode; the centrifugal swing rod is pivoted on the pivoting frame by virtue of a pivot shaft perpendicular to the output shaft, the gravity center of the centrifugal swing rod is arranged at one end far away from the rotating seat, and one end, close to the rotating seat, of the centrifugal swing rod is bent and extends towards the direction of the pressing plate to form a pressing part for pressing the pressing plate; the reset elastic piece is used for pushing the pressing plate in the direction away from the bottom wall so that the air inlet can be communicated with the inner cavity of the air collecting and exhausting chamber. According to the embodiment, vacuum discharging operation can be achieved without an electromagnetic valve.