359results about "Fluid-pressure converters" patented technology

There is provided a fluid circuit capable of continuously driving pressure-increasing devices with a simple configuration. A plurality of pressure-increasing devices are connected in parallel to a fluid supply device that delivers a working fluid. A stroke direction of the piston of each of the pressure-increasing device is switched by the working fluid. A phase of the piston of one pressure-increasing device is different from a phase of the piston of the other pressure-increasing device.

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 invention discloses a gas-liquid pressurization tensioning device and a using method thereof. The device is used for roundness correction of the pipe orifice of the pipeline and comprises a pneumatic control unit, a gas-liquid pressurization unit, a hydraulic control unit and a tensioning unit. The pneumatic control unit comprises a gas control valve and a controller; the gas-liquid pressurizing unit comprises a gas pump assembly and an oil tank which are connected, and the gas pump assembly is connected with a gas control valve; the hydraulic control unit comprises a first pressure sensor, a first energy accumulator and a second energy accumulator; the first energy accumulator is connected with the air pump assembly, and the second energy accumulator is connected with the air pump assembly. When the gas control valve is opened, the gas pump assembly acts to pump hydraulic oil in the oil tank into the first energy accumulator and the second energy accumulator; the controller can control the gas control valve to be opened and closed according to a monitoring result of the first pressure sensor; the tensioning unit comprises a first tensioning assembly and a second tensioning assembly which are symmetrically arranged; according to the device, the tensioning force can be greatly increased, the ovality deviation of the pipe orifice of the steel pipe is effectively reduced, and accurate assembly of the pipe orifice is completed.

The present invention discloses a double-cylinder supercharging structure and a control method. The double-cylinder supercharging structure includes an accumulator, a first supercharging oil cylinder, a second supercharging oil cylinder, a shot sleeve oil cylinder, and an oil tank; the first supercharging oil cylinder and the second supercharging oil cylinder are respectively connected to the shot sleeve oil cylinder; the rodless chambers and the rod chambers of the first supercharging oil cylinder and the second supercharging oil cylinder are interconnected through hydraulic pipelines; the first supercharging oil cylinder and the second supercharging oil cylinder are synchronously controlled through a double-cylinder valve group. The technical solution of the present invention uses two smaller supercharging oil cylinders in parallel to replace a larger supercharging oil cylinder in the prior art, reducing the mass of the supercharging piston and the hydraulic shock during the supercharging action. The two small oil cylinders are synchronously controlled by two oil valves, with a larger flow rate and faster response. It can not only improve the shot sleeve performance and the yield rate of products, but also has a more flexible and compact layout.

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 relates to the technical field of pile drivers, in particular to a water hammer generating device and a pile driver hydraulic system. In order to solve the problems that an existing hydraulic pile driver is low in power density and large in hydraulic system size, a multistage displacement amplification unit is driven through a magnetostrictive rod, a valve element is rapidly controlled to be closed so as to generate the water hammer effect, a hydraulic cylinder piston is pushed through high pressure of a water hammer to lift a hammer head, and the hammer head is accelerated to fall to impact a pile body in combination with gravity. The magnetic drive mechanism comprises an electromagnet outer wall, a coil and a magnetostriction rod, the multi-stage displacement amplification unit comprises an input push rod, a lever and an output push rod which are connected in series, and the hydraulic system integrates a high-pressure small-flow pump and a low-pressure large-flow pump. The power density of the hydraulic system is remarkably improved through the water hammer effect, the response speed of the magnetostriction rod reaches the nanosecond level, rapid opening and closing of the valve element are achieved in combination with the multi-stage displacement amplification unit, and the power density of the hydraulic system can be remarkably improved.

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 field of high-pressure equipment, and relates to a sealing pressure reducing device of manual extremely-high-pressure supercharging equipment and a using method of the sealing pressure reducing device. The sealing pressure reduction device comprises a sealing rod and a fixing sleeve, a supporting rod with the diameter smaller than that of the sealing rod is integrally formed in the center of the right end of the sealing rod, the supporting rod is sleeved with the fixing sleeve in an interference fit mode, the left end of the fixing sleeve is sleeved with the sealing ring in an interference fit mode, and the supporting rod is sleeved with the L-shaped annular pressure reduction mechanisms in an interference fit mode. The L-shaped annular pressure reducing mechanism is located on the left side of the fixing sleeve, and the left end of the L-shaped annular pressure reducing mechanism is sleeved with the sealing ring in an interference fit mode. According to the using method of the sealing pressure-reducing device, the screw rod is manually operated to rotate so that the sealing rod can move towards the outlet direction of the pressure cylinder, abrasion of the inner wall of the pressure cylinder to the sealing pressure-reducing device is reduced through deformation of the L-shaped annular pressure-reducing mechanism, and the pressure-increasing space of the pressure cylinder reaches preset pressure. The pressure reduction function is automatically started by means of pressure applied by fluid, and mechanical abrasion and maintenance requirements are reduced.

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.

The present invention discloses an intelligent energy-saving hydraulic power system, comprising an oil tank, an output oil cylinder, an oil pump, and an oil pump motor. An oil tank air cavity is formed above the hydraulic oil in the oil tank. A hydraulic oil output port and a hydraulic oil input port are provided at the bottom of the oil tank. A compressed air input port connected to the oil tank air cavity is provided at the top of the oil tank. The hydraulic oil output port of the oil tank is connected to the oil inlet of the oil pump via an oil pipeline. The oil outlet of the oil pump is connected to a first oil pipeline and a second oil pipeline respectively. The first oil pipeline is connected to the output oil cylinder, and a first solenoid valve is provided on the first oil pipeline. The second oil pipeline is connected to an electromagnetic reversing valve. The electromagnetic reversing valve is connected to the hydraulic oil input port of the oil tank and the hydraulic gas compression cylinder via an oil pipeline. The compressed air outlet of the hydraulic gas compression cylinder is connected to the compressed air input port of the oil tank. The output oil cylinder is connected to an oil return pipeline, and a second solenoid valve is provided on the oil return pipeline. The intelligent energy-saving hydraulic power system of the present invention has a good energy-saving effect.

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 present invention discloses a continuous flow amplifier, which includes a first reversing valve, a first shuttle valve, a flow amplification cylinder and an oil supply circuit; a hydraulic cylinder is also disclosed, which includes a hydraulic cylinder, a pressure oil supply device and the continuous flow amplifier in the above. The beneficial effects achieved by the present invention: It has the advantages of good sealing performance, reduces the leakage of hydraulic oil, has small overall energy loss, effectively reduces energy consumption, improves the sealing performance, can select hydraulic system components with a lower sealing grade and lower price, thereby can further reduce the manufacturing cost, reduces the probability of failure, and further improves the reliability. It realizes a variety of different working states, can adapt to different working states, meets different usage requirements, and plays a role in improving the applicability and production efficiency. It realizes the effect of increasing the output flow, and achieves the advantages of high efficiency, good sealing performance, stable reliability and low cost.

A liquid pressure calibration apparatus is disclosed, wherein a first liquid path (200) and a second liquid path (300) with different pressure output ranges are arranged in parallel between a liquid pressure inlet port (A) and a liquid pressure output port (B) of the liquid pressure calibration apparatus, and the pressure output range of the first liquid path (200) is continuous with the pressure output range of the second liquid path (300). A target pressure to be output is compared with a switching pressure, and the first liquid path (200) or the second liquid path (300) is selected to supply pressure to the liquid pressure output port (B) based on the comparison result, and the target pressure is output.

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.

The present invention belongs to the technical field of high-pressure liquid expansion forming, and specifically relates to a movable high-pressure boosting device and method. The movable high-pressure boosting device in the present invention includes a base, a sliding mechanism, a high-pressure boosting mechanism and a cylinder driving mechanism; the sliding mechanism is fixed on the base; the high-pressure boosting mechanism is horizontally slidably connected to the base through the sliding mechanism; the cylinder driving mechanism is horizontally fixedly connected to the base, and the output end of the cylinder driving mechanism is connected to the high-pressure boosting mechanism, and its axis is collinear with the axis of the high-pressure boosting mechanism. The present invention realizes the axial movement of the high-pressure boosting mechanism, so that there is no need for an intermediate high-pressure pipeline between the high-pressure boosting mechanism and the pipe to be formed, and it directly enters the pipe to be formed to implement ultra-high-pressure liquid expansion forming, thereby solving the key problems of ultra-high-pressure pipeline design and leakage, and providing technical guarantee for the research and development of ultra-high-pressure liquid expansion forming systems.

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 the technical field of energy storage, in particular to a nitrogen charging and discharging system for energy accumulators, comprising: an energy storage unit comprising a plurality of energy accumulators and a plurality of nitrogen charging devices connected with the energy accumulators, each nitrogen charging device comprising a driver, a push rod and a valve body, the push rod being driven by the driver for plugging or opening the valve body; the nitrogen matrix comprises a plurality of nitrogen cylinders and a plurality of stop valves arranged on the opening sides of the nitrogen cylinders; the pressurizing unit comprises a pressurizing mechanism and one-way valve sets arranged on the upstream and downstream of the pressurizing mechanism, the input end of the pressurizing mechanism is connected to the nitrogen matrix, and the output end of the pressurizing mechanism is connected to the nitrogen charging device. According to the scheme, the defect that in the prior art, manual operation is tedious in the nitrogen charging and deflating process of an energy accumulator in a hydraulic system is overcome, automatic nitrogen charging and deflating are achieved, and the charging efficiency and the system operation stability are improved.

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 fluid circuit includes first switching valve that switches between flow passages and first flow passages according to a change in a fluid pressure to be applied, a second switching valve that is switched to a flow passage which applies the fluid pressure to the first switching valve, when a piston has reached an initial position or an end position, and second flow passages. A biasing force of a biasing member when the piston reaches the end position is smaller than a pressing force acting on the piston due to the fluid pressure caused by a fluid supply device, and a biasing force of the biasing member when the piston reaches the initial position is larger than a sum of a flow passage resistance force acting on the first flow passages and a flow passage resistance force acting on the second flow passages.

The invention discloses a pressurizing oil cylinder, and relates to the technical field of oil cylinders. A second mounting plate and two first mounting plates are connected to the bottom plate, rotating frames are connected to the two first mounting plates, and plunger type cylinder barrels are rotationally arranged in the rotating frames. The cooling shell is connected with the water inlet pipe, water enters the water inlet pipe, the water entering the water inlet pipe enters the cooling shell through the multiple first pipelines, the other ends of the first pipelines are connected with the first connecting ring, and the working temperature of hydraulic oil can be effectively reduced through circulating cooling of the water in the cooling shell, rotation of the cooling shell and the design of circulating water flow; the other end of the cooling shell is connected with a plurality of second pipelines, the other ends of the second pipelines are connected with water outlet pipes, cooled water flows out through the water outlet pipes, and the water circulates in the cooling shell, so that heat of hydraulic oil can be effectively absorbed, the working temperature of the hydraulic oil is reduced, and overheating is prevented.

The invention relates to a pneumohydraulic pressure intensifier comprising at least one pneumatic piston coupled to a hydraulic pump. The pressure intensifier includes a regulator that can be used to adjust the hydraulic output pressure. The regulator is coupled to a hydraulic pilot control valve, which interrupts the air supply to the pneumatic piston when a set maximum pressure is reached.

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.