33 results about "Plunger" patented technology

The invention relates to a power transmission system and application thereof, in particular to a gas-liquid kinetic energy driven system and an oil pumping unit applying the same. The power driven system comprises a gas-liquid accumulator, an execution plunger cylinder, a plurality of reversing valves and a pressure pump, which form a driving oil way and an oil return way, and a closed loop consists of the driving oil way and the oil return way. The oil pumping unit adopts the driven system to drive an oil pumping rod to vertically move and can be folded. The power driven system saves energy resources and has high efficiency and good effects of low carbon and emission reduction, and the oil pumping unit has a simple structure, a small size, less easily-damaged mechanical parts and long service life. By the power driven system and the oil pumping unit, the technical problems that the power system in the prior art requires large motive power and has poor energy-saving effect, and the oil pumping unit is easily fatigue and damaged and has multiple faults are solved.

A solenoid device including a plunger, a solenoid configured to cause a displacement of the plunger, and a driving control unit configured to control driving of the solenoid. The driving control unit supplies current pulses to the solenoid and changes a pulse interval of the current pulses.

The invention relates to the field of preparation of biologic oil, and provides a furfural catalytic hydrogenation method under supercritical carbon dioxide and a method for preparing catalysts. The furfural catalytic hydrogenation method under supercritical carbon dioxide comprises the steps that furfural and palladium and carbon catalysts are added to a reaction still, then the reaction still is sealed, hydrogen is introduced into the reaction still to remove the air in the reaction still, liquefied carbon dioxide is injected into the sealed reaction still through a plunger metering pump, the pressure of the carbon dioxide is made to be above the critical pressure when the carbon dioxide is in an overcritical state, furfural catalytic hydrogenation and upgrading are carried out under the overcritical condition of the carbon dioxide, and a needed liquid product is prepared. The method for preparing the palladium and carbon catalysts comprises the steps of pre-processing of a carrier and preparation of the palladium and carbon catalysts (Pd/C catalysts). In the reaction process, the catalysts have no carbon accumulation phenomenon, can be recycled, largely reduce generation of by-products, and improve the selectivity of the products.

A limit switch has a housing, a plunger that is supported in the housing while being vertically movable, a switch main body disposed in and fixed to the housing by the plunger, an operation shaft having an upper end thereof exposed from a ceiling surface of the switch main body, a contact that is opened and closed by driving the upper end of the operation switch, and a displacement expanding mechanism arranged between the switch main body and the plunger. The displacement expanding mechanism has a pair of pivoting tongue pieces rotatably supported by a pair of support shafts arranged in parallel with each other. A free end of one of the pivoting tongue pieces is abutted on the upper end of the operation shaft. A free end of the other pivoting tongue piece is abutted on an upper surface of one of the pivoting tongue pieces.

The present invention relates to a power unit for a medicament delivery device comprising a power body (24) having opposite proximal and distal ends, a plunger rod driver (44) coaxial and movably arranged in relation to said power body, a plunger rod (72) coaxial and movably arranged in relation to said plunger rod driver, a force spring element (78) operably connected between said plunger rod (72) and said power body; wherein the plunger rod driver comprises first holding elements (66, 68) arranged to interact with second holding elements (76) on said plunger rod (72) and with the power body for releasibly holding said plunger rod (72) with said force spring element (78) in an injection tensioned state; third holding elements (56) arranged to interact with fourth holding elements (41) on said power body (24) for releasibly holding said plunger rod driver in a penetration tensioned state; first attachment elements (52) arranged to interact with second attachment elements (108) on a medicament container holder (92), capable of attaching the two attachment elements together; and first blocking elements (62) arranged to interact with second blocking elements (43) on said power body (24), for blocking any movement of said plunger rod driver (44) in the distal direction after the plunger rod driver is released from a penetration tensioned state.

The invention provides a walking beam type pumping unit working system combined operation method and belongs to the field of oil production engineering. According to the theoretical whole pumping number in a cycle, the crank whole-cycle operation frequency, the used time of operation of each whole cycle, the crank non-whole-cycle swabbing operation frequency, the swabbing operation polished rod stroke of each non-whole cycle, the used time of swabbing operation of each non-whole cycle, the crank non-whole-cycle swabbing-free operation frequency, the used time of swabbing operation of each non-whole cycle and the sequence of crank whole-cycle operation, crank non-whole-cycle swabbing operation and crank non-whole-cycle swabbing-free operation are distributed. According to walking beam type pumping unit working system combined operation method, the whole-cycle jig frequency does not need to be decreased, solving of the problems that the leak rate of a plunger is large and the driving efficiency of a motor is low is facilitated, the requirement of starting up for operation is avoided, and consumption, of the manpower, materials and financial resources, caused by the fact that people go to a construction site to conduct starting-up for operation is reduced disadvantageously; and meanwhile the safe warning requirement can further be met, a crank is made to swing obviously, and the swabbing movement requirement for sand jamming, wax deposit, frozen blocking and laying problems is taken into consideration.

The invention provides a motor-driven injection molding apparatus in which an entire of the apparatus is simplified and made compact. In a motor-driven injection molding apparatus (1), a movable metal mold (12) clamped to a stationary metal mold (11) is mounted to a movable mold plate (13), and two ball screws (17, 18) for moving the movable mold plate (13) are passed through two points on opposing corners of the movable mold plate (13). End portions of the ball screws (17, 18) are set in a cantilever state, and are rotated via pulleys (55, 55) and a timing belt (56), thereby moving the movable mold plate (13). Further, the movable mold plate (13) is guided by a slide guide having a structure that a bearing unit (14) fixed to both sides of a lower portion thereof is fitted to linear rails (15, 16). On the other hand, in an injection side, a injection side movable plate (33) to which an injection plunger (42) is fixed by two tie bars (35, 36) and two ball screws (37, 38) on respective opposing corners, and the same slide guides as mentioned above moves. The movable mold plate (13) is moved by the opening and closing side ball screws (17, 18) so as to be mold clamped, and the injection side movable plate (33) is thereafter moved so as to inject.

The invention provides a 2-stage in-well pipe-rod oil extraction apparatus, which comprises an oil-pumping rod combination, a stage-II oil pipe combination, a stage-II oil pump plunger, a stage-II oil pump cylinder, a link rod, a stage-I oil pump plunger, a stage-I oil pump cylinder, a stage-II fixed valve, a stage-II throw-rod type oil releaser, a stage-I oil pipe combination, a stage-I fixed valve, a stage-I throw-rod type oil releaser and a casing pipe. In the casing pipe, from up to down, the stage-II oil pipe combination, the stage-II oil pump cylinder, a stage-I oil pump cylinder, the stage-II fixed valve, the stage-I throw-rod type oil releaser and the stage-I fixed valve are arranged; a stage-I oil pump plunger is connected through the link rod with the stage-II oil pump plunger, which is connected with the oil-pumping rod combination. The apparatus employs double stages of fixed valves, two oil pumps, two oil releasers and two stages of oil pipes, so that the location of the lower pump of the oil pumps will not be restricted by the level in the casing pipe, and oil can be extracted even from the deeply buried oil layer; in addition, the suspended weight of the oil pumps is reduced, the production cost is reduced.

The invention discloses a lower spraying and cooling device arranged between finishing mill frames. The lower spraying and cooling device is arranged below strip steel on the inlet side of the finishing mill frame, and comprises a collecting pipe which is arranged along the direction vertical to the running direction of strip steel, a water inlet pipe arranged on the collecting pipe, a plurality of discharging and spraying pipes, and a plurality of plunger devices; the plurality of discharging and spraying pipes are uniformly distributed above the collecting pipe along the axial direction of the collecting pipe; each row of the discharging and spraying pipes comprises a plurality of spraying pipes which are distributed along the radial direction of the collecting pipe, and each spraying pipe is communicated with the collecting pipe through a lower port; and the plurality of plunger devices correspond to the plurality of discharging and spraying pipes. Each plunger device comprises a plunger pipe with one sealed tail end, and a plunger which is arranged in the plunger pipe; the plunger pipe is provided with holes which are communicated with the spraying pipe and a water inlet whichis communicated with the collecting pipe; and the plunger can slide along the axial direction of the plunger pipe so as to block the water inlet.

The invention discloses an improved down-hole of an oil well thinner tubing pump. The improved down-hole device of the oil well thinner tubing pump is mainly composed of an upper plunger (1) and a lower plunger (2). The upper plunger (1) and the lower plunger (2) are mutually communicated through a transform device (3). Further disclosed is a working method of the improved down-hole device. The improved down-hole of the oil well thinner tubing pump and the working method of the improved down-hole device are applicable to the oil well thinner tubing pump, and mainly achieve mixing of injection fluid and formation fluid below a fixed valve. According to improvement in structure, working efficiency of the oil well thinner tubing pump is improved, and then exploiting efficiency of a whole oil well is improved.

The invention relates to a connection and base part for accommodating a pluggable surge arrester, comprising a base (13) and a U-shaped part (17), which is connected or can be connected to the base (13) and has guide and/or latching means for accommodating the complementarily designed surge arrester on the mutually facing limb inner sides, a telecommunication switch (11), which is inserted in the base (13), with connections (21) passed to the outside and an actuating device, which is connected to the telecommunication switch (11) and has a plunger (8), which is accessible via a cutout in the limb connecting section of the U-shaped part (17) in order to be operatively connected to a function display, a thermal release or another monitoring device of the pluggable surge arrester. According to the invention, a connecting link-type, groove-shaped guide (12) is introduced in the base (13) and has a continuously arcuate or arcuate/linear profile, wherein the guide (12) extends between the plunger (8) and the telecommunication switch (11). Furthermore, an actuating rail (9), whose form is similar to that of the connecting link, is inserted into the guide, wherein this actuating rail, with an integral design, has the plunger (8) and an areal part (10) for activating the telecommunication switch (11).

The invention provides a downhole sampling device for thickened oil. An in-well fluid sample is contained in a sample barrel, a sample inlet hole is axially formed in a head end connector, an inner center hole is axially formed in a control pup joint, four sample inlets are laterally formed in the control pup joint, a lead screw is installed on the upper segment of the inner center hole in the control pup joint, a sealing plunger piston is installed on the lower segment, the upper end of the lead screw is connected to a micro motor, the micro motor drives the lead screw to rotate in the forward direction or the backward direction under control of a circuit module to drive the sealing plunger piston to move vertically, when the lead screw rotates in the forward direction, the sealing plunger piston moves upwards to a limited position, the lower end face of the sealing plunger piston is away from the upper end face of the sample inlet hole, at the moment, the fluid sample passes throughthe four sample inlets and the sample inlet hole and enters an inner cavity of the sample barrel, and when the lead screw rotates in the backward direction, the sealing plunger piston moves downwardsto a limited position to seal the fluid sample in the sample barrel. The downhole sampling device for the thickened oil is novel in principle, unique in structure, stable in work, easy to operate, lowin machining difficulty and cost, safe, environmentally friendly and remarkable in benefit.

The invention belongs to the field of machining, and particularly relates to a tool for closing in a plunger assembly and a closing-in method. The tool comprises sliding pins (1), a left opening sleeve (2) and a right opening sleeve (3). The tool is connected with the left opening sleeve (2) and the right opening sleeve (3) through the sliding pins (1) to form an inner conical hole, and the closing-in machining requirement is met by means of the step size shrinkage of the inner conical hole; and meanwhile, the edge cutting problem caused by impact load during machining of closing-in type products is solved, and the consistency of the overall machining quality of the products is guaranteed.

The invention discloses a wind-driven water pumping device comprising a vertical rod, a connection plate and a wind blade assembly. The wind-driven water pumping device further comprises two chain wheels, two connection rods, a piston water pump, a water inlet pipe and a water outlet pipe. The connection plate is rotationally connected with the upper end of the vertical rod; the wind blade assembly is formed by a rotating shaft; the rotating shaft is rotationally connected with the connection plate; the chain wheel is rotationally connected with the connection plate; the chain wheel is connected with the rotating shaft via a transmission chain; the upper end of the connection rod is rotationally connected with the edge of the chain wheel; and the piston water pump has a plunger. The wind-driven water pumping device is advantaged by relative low installation precision and low production cost due to transmission by the chain wheel; with the piston water pump, water can be pumped even when the wind power is weak, so great reliability can be achieved; and with a water storage bucket, a water rush hour can be alleviated.

The invention provides a high-pressure pump. The high-pressure pump comprises a fuel inlet end provided with a fuel inlet channel, a fuel outlet end provided with a fuel outlet channel, a shell, a plunger and a damper, wherein the shell is provided with a central shaft, and the fuel inlet end and the fuel outlet end are fixed to the shell; the shell comprises a plunger channel, a plunger cavity connected with the plunger channel, a buffer chamber arranged at the periphery of the plunger channel and a connecting passage communicating the buffer chamber with the fuel inlet channel; the plunger is arranged in the plunger channel and does reciprocating motion in the plunger channel in the central shaft direction; and the damper is fixed in the buffer chamber. According to the pump, the damperis fixed in the buffer chamber arranged at the periphery of the plunger channel, so that the space occupied by the high-pressure pump is reduced.

The invention relates to an offshore installation buffer device. The device is composed of a plunger assembly, a cylinder assembly and an energy storage assembly; the plunger assembly comprises a nylon pad, a cushion pad, a lower end cover and a plunger body; the cylinder assembly comprises a cylinder end cover, an oil passage pipe, a cylinder body, a cylinder flange, an end cover flange and an oil tube joint; a first cylinder end cover is welded on the lower end of the cylinder body, and the cylinder flange is arranged outside the cylinder body; a second cylinder end cover and an end cover flange are fixedly connected; a check valve and a speed adjustment valve are mounted on the second cylinder end cover; an oil nozzle and an air exhaust pressure measuring joint are mounted on the upperportion of the cylinder body; the oil tube joint is welded on the top of the end cover; the energy storage assembly comprises an oil pipe, a stop valve and an energy accumulator; the oil nozzle is connected to the energy accumulator through the oil pipe and the stop valve; the plunger body is located below the cylinder body, and a gap between the plunger body and the cylinder body forms a cylinderinner cavity. The device is designed according to environmental factors during installation of an offshore draught fan, has the advantages of being capable of buffer reset of multiple times in a short time, simple in structure and high in reliability, and can effectively ensure smooth soft landing of the offshore draught fan.

The invention provides a lubricating structure for an output shaft of a liquid booster pump. A first eccentric part of the output shaft bears the maximum load in the liquid boosting process; a telescopic piston of an oil feeder is directly pushed and pressed by a second eccentric part to act mainly by means of power of the output shaft; lubricating oil in a round core hole is sucked and is pushed, pressed and fed to a deep oil supplying hole in the output shaft; and the lubricating oil is forced to be discharged out of an oil outlet and then is subjected to cyclic supplementation on the surface of the first eccentric part, so that good lubrication is maintained for a long time when a rotating wheel of a contact plunger rotates on the first eccentric part, and the service life of the output shaft or the rotating wheel is effectively prolonged.

A chain tensioner includes a sleeve fixedly disposed in the cylinder, with one end thereof inserted in the plunger and the other end protruding out of the plunger. A cylindrical space is formed between the outer periphery of the sleeve and the inner periphery of the cylinder. An oil supply passage opens to the cylindrical space. A communication passage is defined in the sleeve and provides communication between the cylindrical space and the reservoir chamber.

The invention discloses a hot nozzle bush with an automatic fixed type spring plunger. The hot nozzle bush with the automatic fixed type spring plunger comprises a hot nozzle body and the hot nozzle bush, wherein the hot nozzle body is plugged in the hot nozzle bush; the spring plunger is arranged on the plug-in part of the hot nozzle bush and the hot nozzle body; since the hot nozzle bush adoptsa spring plunger fixing form, two circular holes are formed in a symmetrical direction of the hot nozzle bush, the spring plunger is embedded into a spring column groove in the hot nozzle body, and only a circular ball part is exposed; the hot nozzle bush aligns at the circular ball when being installed, and the circular ball is ejected into the circular holes of the bush through an elastic forceeffect of a spring, so that the hot nozzle bush and the hot nozzle body are fixed; and during disassembling, the circular ball is ejected into the spring column groove, so that disassembling can be finished through pulling out with effort; the installing and the disassembling are carried out simply and quickly, so that the efficiency is high; the outer diameter of the hot nozzle bush and the outerdiameter of the hot nozzle body are reduced, so that the raw materials are saved, the cost is saved, the appearance is attractive, the overall quality of the hot nozzle body is improved, and the product value is improved; and through concealed type key groove positioning, the appearance cannot be influenced, and the processing can be carried out simply.

The invention discloses a glue injection plunger head and a glue injection device. The glue injection plunger head comprises a plunger main body part, wherein the outer peripheral wall of the plungermain body part is suitable for sliding fit with the inner peripheral wall of the material storage cylinder. An accommodating groove is arranged on the outer peripheral wall of the plunger main body part; the plunger body part is internally provided with a central hole and at least one first channel which is connected between the central hole and the accommodating groove; a moving plunger part, thefirst end of the moving plunger part is provided with a guide column extending into the central hole; the second end of the moving plunger part is adapted to be connected to a retractable plunger rod; a limit element arranged at one end of the plunger main body part, adjacent to the moving plunger part; the outer peripheral wall of the plunger main body part is provided with an air guide groove communicated with the accommodating groove. The glue injection plunger head can recover the molten colloid material leaked from the gap between the plunger head and the cylinder wall for secondary glueinjection, so that the leakage of the molten colloid material can be effectively reduced, and the utilization rate of the raw material is improved.

A device that regulates, monitors, and provides data on the progress of a large-volume injector during its injection sequence. The device comprises an injector and a monitor assembly. The injector has a syringe having a plunger, and a biasing device that biases the plunger through the syringe. The monitor assembly comprises a resistance unit configured to resist movement of the plunger, a gear connected to the plunger by the resistance unit, and a control unit configured to monitor the position, and regulate the rotation, of the gear. Wherein linear movement of the plunger causes the gear to rotate so that the control unit generates information on the position of the plunger.