249results about "Fluid-pressure converters" patented technology

An apparatus to evacuate fluid is disclosed herein. The example apparatus includes a vent fluidly coupled to a first location, and a valve evacuation system fluidly coupled between the vent and a second location, the valve evacuation system to compress fluid from the first location and pump the compressed fluid to the second location.

The utility model belongs to the technical field of electric gas pressure cylinders, particularly relates to an electric gas pressure cylinder, and aims to solve the problems of complicated structure, inconvenience in maintenance, low accuracy and common gas flow rate adjusting effect in the background technology, and provides the following scheme: the electric gas pressure cylinder comprises a plate frame, and a cylinder body is arranged at the top of the plate frame; a pressurizing bin and a piston bin are arranged at the two ends in the cylinder body correspondingly. The electric gas pressure cylinder is high in precision, good in gas pressure effect, low in manufacturing cost, simple in structure, convenient to operate, long in service life and convenient to maintain, and the electromagnetic valve, the elastic assembly, the piston column and other structures related inside and outside the cylinder body serve as main components of the electric gas pressure cylinder. The mounting plate is supported through the base plate or the cylinder body is rotated and overturned, the cylinder body is inserted into the positioning hole through the insertion column, movement of the cylinder body can be limited, bi-directional adjustment of the working mode of the electric gas pressure cylinder is achieved, the overall practicability of the device is improved, and the functional diversity is increased.

The utility model discloses a pressure boosting device suitable for a hydraulic fracturing crustal stress test, which is sequentially connected with an upper rubber plug and a lower rubber plug of a crustal stress test device through a push-pull pressure relief conversion device, and comprises a pressure boosting cylinder body, a first pressure relief device, a second pressure relief device and a pressure relief device, the second inner cavity is sequentially connected with the upper rubber plug and the lower rubber plug through a push-pull pressure relief conversion device, an exhaust hole communicated with the first inner cavity is formed in the side wall of the pressure boosting cylinder body, and a water inlet and outlet hole communicated with the second inner cavity is further formed in the side wall of the pressure boosting cylinder body. The low-pressure piston is movably arranged in the first inner cavity, the high-pressure piston is movably arranged in the second inner cavity, and the force transmission column is connected with the low-pressure piston and the high-pressure piston. According to the utility model, the limited pressure in the coring drill rod can be increased to the test pressure required by the crustal stress test, so that the equipment loss risk during the crustal stress test is greatly reduced.

A positioner for a pneumatic actuator for actuating a control instrument, such as a control valve, of a process plant, may include an electropneumatic converter, such as a current-pressure converter; a circuit board which carries supply electronics for the electropneumatic converter a casing which comprises at least one electronics compartment in which at least one electronic component of the positioner, in particular the supply electronics, is accommodated, and a converter compartment, in which the electropneumatic converter is accommodated. The electronics compartment and the converter compartment may be spatially separated from one another. The converter compartment may be delimited at least partially by the circuit board.

The invention proposes a double barrier pressure compensator for performing a pressure compensation between seawater surrounding a subsea installation and a medium filling a volume of the subsea installation. Said pressure compensator comprises: —a housing (20) having a first opening (202b) and a second opening (30); —a first bellows (4) and a second bellows (5) arranged one above the other within the housing (20) and each sealingly fixed to the housing (20) at their distal ends (43, 53); —a moving separation element (6) adapted to move inside the housing (20) and sealingly fixed to each of the proximal ends (44, 54) of the first and second bellows (4, 5) so as to separate a first compartment (21) from a second compartment (22) of the housing (20) sealed with respect to each other. Said pressure compensator (2) further comprising a third compartment (23) formed by a space between the housing (20) and the first and second bellows (4, 5), the first compartment (21) being arranged to be fluidly connected to the subsea installation (1) through the second opening (30), the second compartment (22) being arranged to be in communication with sea water through the first opening (202b), and said third compartment (23) being filled with a barrier medium.

The invention discloses a sine reciprocating hydraulic exciting valve, which comprises a valve body, an upper valve sleeve, an upper valve core, a lower valve sleeve and a lower valve core. The valve body is provided with a first inner hole and a second inner hole, and the left and right ends of the valve body are respectively provided with a left end cover and a right end cover. The left end cover, the first inner hole and the right end cover form a flow control cavity, and the left end cover, the second inner hole and the right end cover form an exciting cavity. The flow control cavity is provided with the upper valve sleeve which can slide along the axial direction of the valve body, and the upper valve sleeve is provided with the upper valve core which can rotate along the radial direction of the valve body. The exciting cavity is provided with the lower valve sleeve which can slide along the axial direction of the valve body, and the lower valve sleeve is provided with the lower valve core which can rotate along the radial direction of the valve body. The upper valve core and the lower valve core are provided with two sine reciprocating grooves. The pressure gain of the valve is high, the characteristics are easy to calculate and control, and the anti-pollution performance is good. The axial rotation of the shaft can be converted into the pressure output of the sine signal. When the high-frequency exciting is carried out, the amplitude attenuation degree is low. The overall structure of the exciting valve is simple, the working performance is stable, and the output flow is large.

The present invention relates inter alia to a hydraulic device which may be used as a hydraulic transformer. The hydraulic device comprising a housing, a first tubular cavity and a second tubular cavity both being provided within the housing. A piston structure is reciprocatable arranged within the housing and comprises a first piston and a second piston; wherein the first piston divides the first cavity into two chambers, and the second piston divides the second cavity into two chambers. Fluid passages for individually exchanging fluid between the chambers and the exterior of the housing are provided and each fluid passage comprising a controllable shut-off valve so as to provide the reciprocating movement of the piston structure by exchanging fluid between exterior and the two chambers of the first cavity, and said hydraulic transformed being configured to control the shut-off valves to selectively be in a closed state or in an open state.

The invention belongs to the technical field of composite material preparation machinery, and particularly relates to a positive pressure reset type screw liquid conversion type gap adjusting device which comprises a fixed body, a frame body is installed on one side of the fixed body, a movable body is arranged on the side, away from the fixed body, of the frame body, a mechanical jacking mechanism is arranged on the frame body, and a transverse hole is formed in the side, close to the movable body, of the frame body. A fixed column is arranged in the transverse hole in a sealed and sliding mode, the fixed column moves towards the side close to the moving body through a mechanical jacking mechanism and abuts against the moving body, and a gas pressure reset device is further arranged on the frame body and used for driving the fixed column to move in the direction away from the moving body. The device has the reset function and can meet the no-load adjustment function.

A pressure cylinder includes a working cylinder and an intensification cylinder that is divided by a separator block. A working piston is arranged in the working cylinder and connected to a working rod that extends to an end portion. An intensification piston and an intensification rod are arranged in the intensification cylinder. A pump is configured to provide a pressurized hydraulic fluid to the pressure cylinder. A fluid reservoir is configured to supply a hydraulic fluid to the pump. A first valve is configured to selectively regulate hydraulic fluid flow between the pressure cylinder and the fluid reservoir and the pump. A second valve is configured to selectively regulate fluid flow between a first valve and the advance intensification chamber. A controller is in communication with the first valve and the second valve. The controller is configured to coordinate movement of the working piston and the intensification piston.

The utility model discloses a series-connection pressure ratio variable low-fluctuation supercharger which comprises a pressure applying end and a pressed end. The pressure applying end comprises a first pressure applying end and a second pressure applying end, the first pressure applying end and the second pressure applying end are connected in series through a pipeline, and a first piston rod of the first pressure applying end extends into an inner cavity of the pressed end; the sectional area of the pressurizing cavity of the second pressure applying end is larger than the sectional area of the inner cavity of the pressed end and smaller than the sectional area of the pressurizing cavity of the first pressure applying end. The supercharger has different pressure ratios of low pressure and high pressure, corresponding pressure ratios can be selected under different working conditions, the pressure fluctuation value can be reduced, especially the low-pressure working condition, and the product forming quality is improved.

The invention relates to the technical field of coal mining equipment and hydraulic control thereof, and provides an anchor cable tensioning device hydraulic system for a heading machine and a control method of the anchor cable tensioning device hydraulic system in order to solve the problems of high labor intensity, low construction efficiency, poor safety and the like in the anchor rod and anchor cable supporting and tensioning process at the present stage. The hydraulic oil flow is adjusted according to the preset pressure value; when the anchor cable needs to be tensioned, hydraulic oil is controlled to flow into a rodless cavity of the anchor cable tensioning device after passing through the supercharger, an oil cylinder piston is driven to move forwards, and the anchor cable is automatically tensioned, and after the anchor cable is tensioned, the hydraulic oil is controlled to flow into a rod cavity of the anchor cable tensioning device, the oil cylinder piston is driven to move backwards, and the anchor cable is automatically loosened; the pressurizer is used for continuously pressurizing to a preset high pressure value; and the anchor cable tensioning device is used for carrying out secondary tensioning and fastening on the anchor cable. The design principle is flexible and simple, the equipment integration degree is high, the labor intensity of workers is low, and the construction efficiency and safety are effectively improved.

An apparatus to evacuate fluid is disclosed herein. The example apparatus includes a pipe to transport flammable gas, the pipe including a first valve fluidly coupled to a first region of the pipe and a second valve fluidly coupled to a second region of the pipe, a ball valve implemented along the pipe between the first region and the second region, and a valve evacuation system to compress the flammable gas from the ball valve and pump the compressed flammable gas to the first region via the first valve when the ball valve is in the closed position such that the flammable gas from the ball valve is not vented to atmosphere.

The invention relates to a hydraulically driven transfer unit that is conditioned to high and low temperature values, allows fluids with wide viscosity ranges to be transferred to a system in the desired flow rate and pressure range with minimum heat loss.

A pneumohydraulic pressure intensifier includes at least one pneumatic piston that is coupled to a hydraulic pump. The pressure intensifier includes a regulator which allows to set the hydraulic output pressure. The regulator is coupled to a hydraulic pilot control valve which is adapted to interrupt the air supply to the pneumatic piston when a set maximum pressure is reached.

The invention discloses an electric pressure cylinder, which comprises a piston rod reciprocating in a specified direction; the cylinder body is provided with a space for the piston rod to move; the motor drives the piston rod to move in the space of the cylinder body; the push rod is arranged in the cylinder body in a penetrating manner; a first movable groove is formed in one end of the push rod, and one end of the piston rod is inserted into the first movable groove; a pressurizing piece is arranged in the first movable groove, so that the pressurizing piece provides thrust for the push rod when the piston rod moves in the first movable groove relative to the push rod; the device has the advantages of being simple in structure and reducing cost.

This invention discloses a lifting device for automobile repair, comprising an oil tank, an oil cylinder, and an oil pump. An oil suction pipe is provided between the input end of the oil pump and the oil tank, and a first one-way valve is installed on the oil suction pipe. An oil discharge pipe is provided between the output end of the oil pump and the oil cylinder, and a second one-way valve is installed on the oil discharge pipe. A return pipe is provided between the oil cylinder and the oil tank, and a shut-off valve is installed on the return pipe. An end cap is fixedly installed at the upper end of the oil tank. A piston plate is slidably and sealed inside the oil tank. A lifting airbag is provided between the piston plate and the end cap. The oil cylinder includes a piston rod, a piston body, and a cylinder body. A fixed pulley is rotatably installed on the end cap, and a pull rope is installed on the fixed pulley. The two ends of the pull rope are fixedly connected to the piston plate and the piston body, respectively. This invention improves the load-bearing capacity of the piston rod of the hydraulic jack by setting a lifting airbag and pulley structure between the oil cylinder and the oil tank, making the piston body less prone to oil leakage and damage.

There is provided a fluid circuit capable of continuously driving a pressure-increasing device with a simple configuration. A first switching valve 8 that switches between flow passages 70 and 80 which allow communication between a first pressure-receiving chamber 10-3 and a fluid supply device 6 side and flow passages 70 and 82 which allow communication between a second pressure-receiving chamber 10-4 and the fluid supply device 6 side, according to a change in a fluid pressure to be applied, and a second switching valve 130 that is switched to flow passages 131 and 133 which apply the fluid pressure to the first switching valve 8, are provided. The second switching valve 130 includes return device 140, and is provided to be reciprocatable between an operation position to which the second switching valve 130 is moved by a stroke of a piston 120 and a return position to which the second switching valve 130 is moved by the return device 140. The piston 120 and the second switching valve 130 are movable independently of each other.

A backup emergency valve drive system for a liquified gas container, having hydraulic accumulators 4 supplying hydraulic fluid to emergency valves 6 of a liquefied gas vessel, and hydraulic pressure i

The present invention provides a wave energy power generation hydraulic PTO constant speed and pressure control method based on dual parameter joint adjustment, the method comprising: collecting the system oil pressure signal p of the main oil circuit through a pressure transmitter, and sending the oil pressure signal p to the oil pressure closed loop regulation module; measuring the torque signal M of the input shaft of the three-phase permanent magnet synchronous generator through a speed torque meter; g and speed signal n, and the signal M g and n are sent to the oil pressure open-loop regulation module, and the signal n is sent to the oil pressure closed-loop regulation module; the electromagnetic torque of the three-phase permanent magnet synchronous generator is controlled by the three-phase PWM rectifier to indirectly adjust the speed n; the three-phase current signal i at the outlet of the three-phase permanent magnet synchronous generator is collected by the generator vector controller a i b i c , and output SVPWM signal to the three-phase PWM rectifier, while receiving the speed signal n and setting speed n r The present invention has good speed stabilization and pressure stabilization effects.

The utility model provides a novel ultrahigh-pressure supercharger structure which is composed of an ultrahigh-pressure supercharger oil cylinder, a high-pressure cylinder connecting barrel, a high-pressure cylinder and the like. According to the working principle, the motor drives the oil pump, oil pushes the large piston, the large piston drives the small piston, and low-pressure media are converted into high-pressure media. Continuous pressure output is achieved through reciprocating motion of the piston, and the high-pressure one-way valve controls one-way flowing of media to ensure stable pressure. The supercharger can automatically reciprocate, so that the operation efficiency of the system is improved. The key parts are made of excellent materials, the high-pressure cylinder is made of high-strength alloy steel, the piston rod is made of high-strength alloy materials, and the sealing piece is pressure-resistant and wear-resistant. Meanwhile, an intelligent control system is arranged, working parameters can be adjusted, and a cooling and safety system is arranged to guarantee normal operation and operation safety of equipment. The wear condition of key parts needs to be checked regularly in daily life, oil quality in the oil cylinder is managed, the service life of equipment is prolonged, and stable performance is guaranteed.

The present invention discloses a gas-liquid booster cylinder and method thereof, comprising a forward assembly, including a forward cylinder body and a first piston member, the forward cylinder body being provided with a first motion chamber and a first air port, a buffer member being provided in the first motion chamber, and the first air port being connected to the first motion chamber; a first piston member being installed in the first motion chamber, and both ends of the first piston member respectively passing through the forward cylinder body; a working hydraulic cylinder body being provided with a liquid storage chamber, a liquid injection port, and a second air port, and a booster liquid being stored in the liquid storage chamber; a booster assembly, including a booster cylinder body, a second piston member, a spring member, and an electromagnet member, the booster cylinder body being provided with a second motion chamber; and a control unit being respectively connected to the first air port, the second air port, and the second motion chamber. The gas-liquid booster cylinder of the present invention can reduce compressed gas consumption and improve piston rod movement efficiency, thereby improving the working efficiency of the gas-liquid booster cylinder.

The invention provides a work exchange type energy recovery device with a leakage rate detection function, which is provided with a special circulation hole, the circulation hole is not communicated with a relative low-pressure fluid inlet and a relative low-pressure fluid outlet of the energy recovery device, and an upper end cover and a lower end cover of the energy recovery device are not provided with leakage liquid guide-out channels. The shell, the upper end cover and the lower end cover form a leaked fluid collecting area, the circulating hole is externally connected with a leaked fluid discharging pipe, and a flow meter is arranged on the leaked fluid discharging pipe; the rotating assembly and the non-rotating assembly of the energy recovery device are provided with guide channels, and leaked liquid between the rotating assembly and the non-rotating assembly is guided into the leaked fluid collecting area or guided to the circulating hole. According to the invention, the fault detection problem that the most important fault high-pressure fluid leakage of the energy recovery device is too large can be solved through a low-cost scheme, and the abnormal condition can be accurately detected in real time.

The present application relates to the technical field of fishbone separating device, in particular to a fishbone separating machine for fish food processing, which comprises a base, the upper end of the base is fixedly connected with a processing cylinder, the outer side of the processing cylinder near the upper position is a feeding port, the inner side of the processing cylinder is provided with an extrusion roller shaft, the lower side of the extrusion roller shaft of the processing cylinder is fixedly connected with a filter cartridge, the inner side of the filter cartridge is installed with a separating mechanism for discharging minced meat, the inner side of the separating mechanism is installed with a fishbone removing mechanism for processing fishbone inside the filter hole of the filter cartridge, the hollow shaft and the installation cylinder are axially advanced by cooperating with the material removing assembly, the minced meat inside the filter cartridge can be stably and non-residually pushed outwards, which effectively avoids the decrease of separation efficiency caused by the accumulation of minced meat and the blockage of fishbone; the fishbone, fish skin and other waste materials outside the filter cartridge are synchronously cleaned by the driving arc-shaped scraper, forming a linkage operation mode of synchronous minced meat pushing and fishbone waste discharging.

The application discloses a delay starting device and a pneumatic supercharger. The delay starting device comprises a pilot control valve, a first pilot gas path and a second pilot gas path. The pilot control valve is connected with the first pilot gas path, the second pilot gas path and a pilot control gas path of a switching valve in the pneumatic supercharger respectively. The first pilot gas path is communicated with an input end of the pneumatic supercharger, and the second pilot gas path is communicated with an output end of the pneumatic supercharger. A valve core of the pilot control valve moves according to a pressure difference between the first pilot gas path and the second pilot gas path, so as to turn on or turn off the pilot control gas path connected with the pilot control valve. The pilot control gas path is used for controlling the switching of the switching valve in the turned-on state, so as to realize the switching of the working position of the switching valve. Through the delay starting device, the high-frequency switching of the pneumatic supercharger in the starting stage can be avoided, the service life of the pneumatic supercharger is improved, useless work of the pneumatic supercharger is reduced, and input flow is saved.

The utility model relates to the technical field of hydraulic pumping units, in particular to a pressure cylinder type hydraulic system of an energy-saving pumping unit, which comprises an oil tank, a large energy accumulator, a fan and a servo pressure cylinder, the surface of the oil tank is respectively communicated with a liquid supplementing electric pump through a pipeline, the surface of the liquid supplementing electric pump is fixedly connected with a liquid supplementing motor, and the servo pressure cylinder is fixedly connected with the large energy accumulator. A throat hole is formed in the surface of the main electric pump and communicates with a fifth ball valve through a pipeline, and the fifth ball valve communicates with the oil tank through a pipeline. The servo pressure cylinder is utilized to reduce energy consumption, the servo pressure cylinder is controlled to compress hydraulic oil, the hydraulic oil is compressed into the hydraulic oil cylinders, meanwhile, the left hydraulic oil cylinder and the right hydraulic oil cylinder can assist the other hydraulic oil cylinder to ascend under the condition of self weight, and the energy consumption can be saved by more than 30% in the process. The high controllability of the servo motor is utilized to control the rotating speed so as to control the stroke frequency of the hydraulic cylinder of the oil pumping unit.

The invention relates to a compact composite pressure cylinder and a bench clamp, the composite pressure cylinder comprises a cylinder body, a pressure piston, a pressure plunger, a pressure regulating plunger and a pressure regulating assembly, a pressure cavity, a pressure cavity and an oil storage cavity which are communicated are coaxially arranged in the cylinder body, the oil storage cavity is nested in the pressure piston, and the oil storage cavity, the pressure cavity and the pressure cavity form a closed composite cavity; the pressure adjusting assembly sets the cylinder pressure threshold value of the composite pressure cylinder by adjusting the retreating resistance of the pressure adjusting plunger. And when the cylinder pressure exceeds a threshold value, the pressure regulating plunger retreats into the oil storage cavity to stabilize the system pressure. The bench clamp combines the pressure cylinder with a force application mechanism, so that the clamping force and the stability are obviously improved. Pressure fluctuation is compensated through the oil storage cavity, stable clamping force is ensured, meanwhile, the axial size is compressed, the structure is compact, the size range of a clamped workpiece is enlarged, and installation and use are convenient. The technology is widely applied to the field of machining, the efficient, stable and accurate clamping effect is achieved, and the machining quality and efficiency are remarkably improved.

The utility model discloses an oil pressure and air pressure conversion device of a five-axis rotary body, which is applied to the field of industrial automation and comprises a gas-liquid converter body, an output shaft is arranged at the top of the gas-liquid converter body, and a top plate is bolted at the top of the output shaft; by arranging the telescopic cover on the surface of the output shaft and protecting the output shaft, the purpose of a protection function can be achieved, the cleanness of the output shaft is ensured, the service life is prolonged, the clamping head is separated from the clamping hole by rotating the rotating ring, the telescopic cover is taken down, the telescopic cover is convenient to maintain, the practicability is improved, and the service life is prolonged. By means of the mode that the sliding barrel is moved to enable the trapezoidal block to move, the trapezoidal block moves to enable the clamping block to be disengaged from the clamping groove under the action of the third spring, and the connecting pipe is taken down from the connector, the purpose of conveniently assembling and disassembling the pipeline can be achieved, the workload is reduced, and the working efficiency is improved.

Methods and systems for transferring hydraulic power between a pump and an actuator. The actuator (3, 13) has an inlet (7) and an outlet (8) for hydraulic fluid, an actuator circuit between the inlet and the outlet and outside the actuator, in which the hydraulic fluid circulates from the outlet (8) to the inlet (7). The pulse pump (1) is used to generate a pressure pulse of a desired frequency and to transmit hydraulic power to the actuator (3, 13) by means of the pressure pulse by converting the pressure pulse into a flow to the inlet (7) of the actuator. The return flows from the actuators are returned during cycles between the pressure pulses for use in the pressure pulses following each return flow, whereby an amount of hydraulic fluid corresponding to the volume of the pressure pulses moves back and forth across the cross-sectional flow region in the power transfer conduit or hose (2) between the pulse pump (1) and the actuators (3, 13).