648 results about "Screw pump" patented technology

The disclosure relates to a screw pump (2) comprising: a casing (3) with an inlet (30), an outlet (31) and a flow chamber (32) between the inlet and the outlet, and at least two screws (4, 5, 6) housed in the flow chamber to force a fluid flow 5 through the flow chamber from the inlet to the outlet, wherein each screw (4, 5, 6) comprises a release coupling (45, 52, 62) to restrict, when in use, the rotation of the screw when it is being extracted from a molding tool.

Screw pump (2) comprising: a casing (3) with an inlet (30), an outlet (31) and a flow chamber (32) between the inlet and the outlet; at least two screws (4, 5, 6) housed in the flow chamber to force a fluid flow through the flow chamber from the inlet to the outlet; and a flexible coupling (11) connected to one of the screws to couple the screw to a drive motor (10).

The disclosure relates to a screw pump (2) comprising: a casing (3) with an inlet (30), an outlet (31) and a flow chamber (32) between the inlet and the outlet; and at least two screws (4, 5, 6) housed in the flow chamber to 5 force a fluid flow through the flow chamber from the inlet to the outlet; wherein the casing (3) comprises a shell (33) within which an insert (34) defining the flow chamber is housed.

Eccentric screw pump with a rotor of a drive shaft circulating essentially about a fixed axis in relation to the stator in a bearing block, a power train and a screw conveyor, which revolves in a rotating-oscillating manner in a screw flight of the stator, wherein the power train provides the screw conveyor with its drive torque and the power train adjusts the differences of the motion sequences of the screw conveyor and of the drive shaft, wherein the power train consists essentially of a one-piece rotational body, which has multiple weakening recesses, which interrupt its outer circumferential jacket surface more than only insignificantly and which provide it with that reversible elasticity, which it requires in order to rotate about an axis of rotation, which curves in a periodically recurring manner at least in sections.

The invention discloses an anti-airlock method and equipment for an electric submersible screw pump based on working condition recognition and a medium, and relates to the technical field of oil exploitation equipment. The method comprises the steps that based on an underground detection device and a ground control cabinet sensor of the electric submersible screw pump unit, operation parameters of the electric submersible screw pump unit are collected in real time, and the operation parameters are preprocessed to obtain standard operation parameters; wherein the operation parameters comprise pump inlet pressure and motor output current; extracting pressure-current correlation characteristics under the airlock working condition to construct an airlock working condition identification model, and inputting the standard operation parameters into the airlock working condition identification model to obtain an airlock state grade; and based on the airlock state grade, the operation regulation and control strategy of the electric submersible screw pump unit is adjusted so as to eliminate the airlock phenomenon. Real-time data of underground and ground sensors are collected, the airlock grade is judged in advance through the airlock working condition recognition model, the operation state is automatically adjusted, and early warning of the airlock is achieved.

The utility model discloses a screw pump with an adjustable shaft seal position structure, which relates to the technical field of screw pumps and comprises a driving screw, a shaft elastic retainer ring is arranged on the outer side of the top of the driving screw and clings to the end of an adjusting shaft sleeve, a sealing gland is fixedly connected to the outer side of the driving screw, and the sealing gland is fixedly connected to the outer side of the driving screw. A bearing seat is arranged at the end, close to the front end cover, of the sealing gland, a screw is in threaded connection with the end, away from the front end cover, of the sealing gland, the bearing seat is in threaded connection with the sealing gland through the screw, and a bearing is arranged at the bottom of the end, close to the front end cover, of the driving screw. Wherein an O-shaped sealing ring groove is formed in the outer surface of the bottom of the driving screw rod, an elastic check ring groove for a hole is formed in the outer surface of the top of the driving screw rod, an adjusting shaft sleeve is arranged on the outer side of the driving screw rod, and the technical problems that the sealing replacement process is tedious, only one sealing material can be selected, and many limitations exist are solved.

The utility model discloses a screw pump with a laminated shaft seal structure, which relates to the technical field of screw pumps and comprises a screw pump body, a driving screw is arranged at one end of the screw pump body, one end of the screw pump body provided with the driving screw is connected with a bearing seat, one side of the bearing seat is movably connected with a sealing gland, and the other side of the bearing seat is provided with a shaft seal. A plurality of groups of sealing base plates are arranged between the sealing gland and the bearing seat in a stacked mode, the whole effective sealing time is prolonged by multiple times by adopting the multiple shaft seals to be used alternately, shaft seal materials can be selected, the shaft seals made of different materials are adopted, and the medium adaptability and the sealing effect can be more superior and more obvious. By means of the sealing gasket, the shaft seal can be adjusted on the premise that general assembly parts such as a motor and a coupler do not need to be disassembled, maintenance operation is simplified, and maintenance cost is saved.

The invention discloses an underground intelligent oil extraction pump and system. The oil extraction pump comprises a plurality of sensors, and an oil pipe, a screw pump, a motor, a gas-liquid separation device and a sand-washable gas anchor which are connected from top to bottom, the sensor is used for collecting underground environment data and motor working state data; the controller is used for acquiring and encoding data acquired by the sensor, receiving a control instruction and sending a corresponding control signal to the motor; the motor drives the screw pump to work according to working parameters indicated by the control signal; the screw pump is used for pumping oil-containing liquid in the well through an oil pipe or pumping cleaning liquid on the well into the well through the oil pipe; the system comprises an underground intelligent oil extraction pump and a ground control cabinet, the ground control cabinet is used for receiving the coded data transmitted by the controller, monitoring the underground working condition and controlling the working state of the motor according to the monitoring result. The oil extraction pump and the system effectively prolong the pump inspection period, save manpower resources, effectively reduce abnormal working conditions in a well, and prolong the service life of the oil extraction pump.

The invention belongs to the technical field of oil exploitation equipment, and particularly provides a screw pump rotor surface treatment optimization method and system based on wear trajectory quantization, and the method comprises the steps: obtaining the contact conditions of the motion trajectory of feature points on the rotor surface and the inner wall of a stator in different angle intervals according to the motion trajectory of the rotor surface; calculating the geometric wear strength of each feature point according to the contact condition; and optimizing the surface structure of the rotor according to the geometric wear strength so as to homogenize the wear. From the perspective of surface treatment optimization, the problem of uneven wear can be more effectively solved by quantifying the wear track and optimizing the rotor surface treatment in a segmented manner.

The invention relates to the technical field of oil field oil production engineering, in particular to an underground data acquisition unit with flow, pressure and temperature monitoring functions and a method. The method is suitable for underground working condition monitoring of submersible motor type lifting equipment such as submersible screw pumps, submersible plunger pumps and submersible centrifugal pumps. The unit comprises a pressure-resistant shell, wherein a central pipe, an electromagnetic flowmeter, two pressure and temperature sensors and an underground parameter collector are integrated in the pressure-resistant shell; the two sensors are used for measuring the temperature and pressure of liquid flow of the central pipe and the temperature and pressure of an oil casing annulus respectively; the electromagnetic flowmeter measures the flow, and real-time temperature and pressure data are used for compensation to improve the precision. The unit is further provided with a collecting pipe, an upper end, a lower end, a connecting sliding ring, an annulus / oil pipe inner testing channel, a sealing rubber ring and the like. Through the integrated design, synchronous high-precision in-situ monitoring of underground key parameters is achieved, the problem that underground data of multiple instruments are not synchronous is solved, and a reliable data terminal is provided for an intelligent oil field.

The invention relates to an external-circulation high-efficiency energy-saving high-viscosity material fermentation system and a use method thereof. The system comprises a fermentation tank, an emulsification shear pump, a buffer tank, a screw pump, a distributor and a static mixer, the fermentation tank is connected with the emulsification shear pump through a fermentation discharge pipe, the emulsification shear pump is connected with the buffer tank through a homogeneous feed pipe, the buffer tank is connected with the screw pump through a buffer material pipe, the screw pump is connected with the distributor through a pumping material pipe, and the static mixer is connected with the screw pump. The distributor is connected with the static mixer through a material distribution pipe; the static mixer is connected with the fermentation tank through a material return pipe; the fermentation tank, the buffer tank and the distributor are all connected with the air supply mechanism, and the fermentation tank and the emulsification shear pump are both connected with the disinfection mechanism. The use method of the fermentation system comprises a disinfection stage, an early fermentation stage and internal and external circulation linkage of fermentation. According to the method, the energy consumption of the fermentation process is effectively reduced, the yield of single-batch exopolysaccharides is greatly increased, and the productivity is greatly improved.

The embodiment of the invention provides a multi-component proppant migration analysis device and an experimental method. The device comprises a plurality of independent sand tanks, a plurality of flow control valves, a ground manifold, a screw pump, a proppant migration simulation system, a laser particle size sensor and a data acquisition system, the outlet of each independent sand tank is connected with the corresponding flow control valve; the outlet end of each flow control valve is communicated with the inlet end of the ground manifold, the outlet end of the ground manifold is connected with the feed port of the screw pump, and the discharge port of the screw pump is connected to the inlet end of the proppant migration simulation system; the laser particle size sensor is fixed on the outer side of the proppant migration simulation system; and the data acquisition system is connected with the laser particle size sensor, the plurality of flow control valves and the screw pump. The device provides reliable experimental data support for optimization of a field hydraulic fracturing scheme.

The utility model discloses a triangular-cone-shaped high-temperature-resistant and hydrogen-sulfide-resistant screw pump sealing impact device, the main body structure of the triangular-cone-shaped high-temperature-resistant and hydrogen-sulfide-resistant screw pump sealing impact device is a lower sealing occlusion ring and an upper sealing occlusion ring which are occluded up and down, and the triangular-cone-shaped high-temperature-resistant and hydrogen-sulfide-resistant screw pump sealing impact device comprises the lower sealing occlusion ring and the upper sealing occlusion ring, the bottom face of the upper sealing meshing ring is provided with a triangular cone-shaped meshing groove, and the material has the advantages of being good in high temperature resistance, hydrogen sulfide resistance and abrasion resistance, high in strength and good in toughness. Through the arrangement of the lower sealing occlusion ring and the upper sealing occlusion ring, close fit of the lower sealing occlusion ring and the upper sealing occlusion ring can be achieved, the occlusion face is of the regular triangular cone type three-dimensional structure distributed in the radial direction, the structure has the good impact resistance and anti-scouring characteristics, the overall structure is simple in process, convenient to install and long in service life, and the service life is long. The stable sealing performance of the sealing device in a high-temperature and hydrogen sulfide environment is ensured, and medium leakage is prevented.

The invention relates to the technical field of oil well paraffin removal, in particular to an electric submersible screw pump well anti-paraffin-deposition chemical injection and thermal washing integrated device. Comprising a pesticide injection barrel, a high-pressure plunger pump, a three-way valve and a connecting pipe, the connecting pipe is fixedly connected and communicated with a plurality of butt-joint pipes, annular injection assemblies with the same number as the butt-joint pipes are arranged outside an oil pipe, and the butt-joint pipes are communicated with the corresponding annular injection assemblies respectively. A paraffin remover and hot water are injected at fixed points at different depths of an oil pipe through a plurality of butt joint pipes, so that a paraffin removal medium completely bypasses the electric submersible screw pump, chemical swelling and high-temperature thermal damage of the agent to stator rubber are avoided fundamentally, the service life of the pump is remarkably prolonged, meanwhile, the paraffin remover and the hot water are continuously supplemented at different depths, and the service life of the pump is prolonged. The concentration of the paraffin remover is kept stable, the temperature of hot water is kept, the dissolving strength of the paraffin remover on a paraffin precipitation layer and the melting effect of the hot water on wax are ensured, and the paraffin removal thoroughness and the operation efficiency are greatly improved.

The three-screw pump comprises a mechanical seal, a sealing support, a front cover, a pump body, a lining, a driving screw, driven screws, the L-shaped shaft shoulder sleeve and a bearing, the lining is fixed in the pump body, and the driving screw and the two driven screws are assembled in a cavity of the lining in a meshed mode; the front cover is fixed to the front end of the pump body, the sealing support is fixed to the outer side of the front cover, the mechanical seal sleeves the end, extending out of the front cover, of the driving screw, a static ring of the mechanical seal is connected with the sealing support, and a movable ring is connected with the driving screw. The bearing is arranged at the end, away from the driven screw, of the driving screw, the inner ring of the bearing is in interference fit with the driving screw, the outer ring of the bearing is fixedly connected with the cover plate, and the shaft shoulder section of the driving screw is sleeved with the L-shaped shaft shoulder sleeve which is located between the driving screw and the front cover. And the mounting mode and the fit clearance of the L-shaped shaft shoulder sleeve are selected according to different pressure grades, so that the economic loss and the repair progress influence after shaft sticking are reduced.

The utility model discloses an adjustable safety cover for a screw pump unit, which relates to the technical field of screw pump unit facilities and comprises a safety cover fixed end, a safety cover movable end is movably connected in the safety cover fixed end, and the safety cover fixed end comprises a fixed end face plate, a fixed end side face plate and a fixed end cover plate. The safety cover movable end comprises a movable end face plate, a movable end side face plate and a movable end cover plate. Handles are arranged above the fixed end cover plate and the movable end cover plate, and the fixed end cover plate and the movable end cover plate are connected through the handles; an adjusting assembly is arranged between the safety cover fixed end and the safety cover movable end, the adjusting assembly comprises a sandwich plate and a second groove, the length of the whole safety cover can be adjusted within a certain length range through cooperation of a bolt, a nut, a hole and a boss, the length can be fixed, and therefore the safety cover can replace original safety covers of various specifications; the universality of the safety cover is improved, and the management cost is reduced.

A kind of bridge breaking structure of sludge screw pump, including shell, motor group, main shaft, screw, the shell is provided with feed hopper, it is characterized in that: the main shaft is coaxially provided with sludge breaking piece, rotating door piece between screw, the main shaft is provided with key type protruding portion along radial direction, the rotating door piece includes shaft sleeve part, connecting arm, arc baffle part, expansion piece, the shaft sleeve part is equipped with the inner hole with the outer diameter of main shaft adaptation, the inner hole wall is coaxially provided with the annular groove with the diameter of key type protruding portion adaptation, axial width adaptation, the annular groove is provided with several expansion holes around the center of circle equal division, the expansion piece is arranged in expansion hole and does sliding fit, the expansion piece rotates with rotating door piece angle, by gravity, exceeds expansion hole and key type protruding portion and forms synchronous rotation by abutting, or retract in expansion hole and let key type protruding portion pass through;The arc baffle part gradually rotates with the main shaft, intermittently closes, opens feed inlet.

The invention belongs to the technical field of surgical instruments, and particularly relates to a gastrointestinal fluid decompression device for gastrointestinal surgery, which comprises a shell, a negative pressure assembly, a cleaning assembly and a switching mechanism, the switching mechanism drives the negative pressure assembly and the cleaning assembly to be in butt joint with the butt joint opening in a negative pressure mode and a cleaning mode correspondingly and form negative pressure and release cleaning liquid in a pipeline connected with the butt joint opening correspondingly, the negative pressure assembly is a negative pressure peripheral pump, the cleaning assembly is a liquid conveying screw pump, the switching mechanism comprises a gear ring and a motor, the gear ring is rotationally arranged in the shell, and the motor is arranged in the shell. A transmission gear is arranged on an output shaft of the motor and meshed with the outer side of the gear ring, the inner side of the gear ring is meshed with a rotating shaft of the negative-pressure peripheral pump and a transmission rod of the liquid conveying screw pump, and positive and negative rotation of the gear ring is used for driving the negative-pressure peripheral pump and the liquid conveying screw pump to be switched to the butt joint position of the butt joint opening and driving the rotating shaft and the transmission rod to rotate. The negative pressure can be provided and the pipeline can be cleaned by switching positions.

1. The name of this design product: high-precision metering screw pump (new pump model). 2. Purpose of this design product: This design product is used in equipment for conveying fluids. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: Stereoscopic drawing 1.

A comprehensive utilization system for extracting black rice anthocyanin and separating starch is provided with a screw conveyor, an extraction tank is arranged at an outlet of the screw conveyor, stirring blades are arranged in the extraction tank, a liquid outlet pipe is arranged on one side of the extraction tank and connected with a liquid outlet pump through a valve, and the liquid outlet pump is connected with the extraction tank and a liquid storage tank through pipelines. A slag outlet in the bottom of the extraction tank is connected with a screw pump through a pipeline and a valve, an outlet of the screw pump is provided with a pulping machine, an outlet of the pulping machine is provided with a vibrating screen, a filtrate outlet of the vibrating screen is provided with a filtrate collecting tank, the filtrate collecting tank is connected with a horizontal screw centrifuge through a horizontal screw feeding pump, and a slag outlet of the horizontal screw centrifuge is provided with a horizontal screw slag collecting tank; according to the utility model, the extraction of black rice anthocyanin is realized through the extraction tank, starch in black rice is separated and collected by the horizontal screw centrifuge, compared with natural sedimentation, the occupied area is small, the treatment capacity is large, the efficiency is high, the obtained starch has low water content and high quality, and the extraction of black rice anthocyanin and the recycling of starch are realized.

The utility model discloses a destabilization coagulation separation device and relates to the technical field of sewage treatment. Effluent of the coagulation reaction area enters the flocculation reaction area, effluent of the flocculation reaction area enters the shallow settlement area, an inclined plate is arranged in the middle of the shallow settlement area, a rotary mud scraper is arranged at the lower part of the shallow settlement area, supernate of the shallow settlement area enters the gravity settlement area, the gravity settlement area adopts winding corridor type design, and effluent of the gravity settlement area enters the water outlet groove. The device disclosed by the utility model has the beneficial effects that the gravity settling area is arranged behind the shallow settling area, colloidal particles which do not participate in flocculation are settled in the gravity settling area, the settling time of the colloidal particles is prolonged through the ambulatory design of the gravity settling area, and the settled colloidal particles flow back to the coagulation reaction area through the screw pump B to participate in reaction again after being gathered, so that the flocculation effect is improved. The height of the rectangular water outlet groove is in direct proportion to the flow velocity, the lifting height of the lifting rod is observed through the gradienter, the water outlet flow can be calculated, and metering is simple and reliable.

The present application belongs to the technical field of oily sewage treatment, and specifically discloses an oily sewage treatment system for an oil sand oil treatment station, which comprises a first treatment pool, a second treatment pool and a high-temperature ethylene glycol main pipe, the two pools are connected through a connecting pipe with a sand filtering assembly, a cover is arranged on the top of the pool body, a screw pump is installed on the cover of the second treatment pool through a support, the rotor and the stator of the screw pump extend into the pool, an oil liquid inlet pipe is connected to the first treatment pool, an inclined sand screening plate is arranged in the first treatment pool, high-temperature ethylene glycol coils are arranged on the bottom of the two pools, the coils are connected with the high-temperature ethylene glycol main pipe and have a gap with the bottom of the pool, and a loading sewage discharge pipe is further arranged in the pool. The present application is aimed at the problem that the existing sewage discharge pool is prone to freezing and solidification of oil liquid in a low-temperature environment, thereby affecting secondary treatment. In the present application, the sewage enters the first treatment pool through the oil liquid inlet pipe, the sand screening plate is used to preliminarily remove sand, the oil liquid enters the second treatment pool through the connecting pipe after sand filtering, the high-temperature ethylene glycol heats the sewage through the coils, thereby reducing the viscosity of the oil liquid and preventing freezing, and the screw pump is used to extract and recycle the oil liquid.

The utility model discloses an oil injection mechanism of a gear reducer, which comprises an injection gun body, an oil injection pipe, a driving motor, a screw rod and a spiral pipe cavity, one side of the injection gun body is provided with a grip, and a trigger switch is installed for controlling the starting and stopping of the driving motor. An injection conveying pipe is fixedly installed in the oil injection pipe, a spiral pipe cavity is formed in the inner side of the oil injection pipe, the spiral rod is rotationally installed on the injection gun body, and the periphery of the spiral rod abuts against and is meshed with the inner wall of the spiral pipe cavity to form a sealed conveying channel. The single-screw pump conveying principle is adopted, a plurality of independent sealed conveying cavities are formed in the spiral pipe cavity through eccentric rotation of the spiral rod, stable and continuous lubricating oil conveying is achieved, and compared with a traditional piston pump or straight pipe gravity oil injection mode, the flow uniformity is improved, lubricating oil leakage is reduced, energy consumption is reduced, and the service life of the lubricating oil pump is prolonged. The utility model is suitable for the fields of gear reducers, industrial equipment lubricating systems and the like.

The utility model discloses a vertical three-screw pump, which belongs to the technical field of screw pumps and comprises a pump head, a safety valve is arranged on the pump head, a connecting frame is arranged on the upper end face of the pump head, a motor used for driving the pump head is arranged on the upper end face of the connecting frame, and a base is arranged on the inner side of the connecting frame. A filter is arranged at the lower end of the base, oil liquid of an external oil conveying pipeline is filtered by the filter, surrounds the pump by one circle through a base pipeline of the base and then enters the pump head, and the high-pressure medium low-noise pump can be suitable for low-noise conveying of high-pressure media and is stable in operation and extremely small in vibration and noise.

The utility model discloses a screw pump for battery coating, which comprises a pump body, a feed pipe is arranged at one end of the pump body, a discharge pipe is arranged at the other end of the pump body, a pump core is arranged in the pump body, two ends of the pump core are respectively communicated with the feed pipe and the discharge pipe, and the feed pipe is communicated with the discharge pipe. The pump core comprises a stator and a rotor rotationally connected into the stator. A circulating pipeline is arranged between the discharging pipe and the feeding pipe, the circulating pipeline is communicated with the feeding pipe and the discharging pipe of the screw pump, a loop is formed between the discharging pipe and the feeding pipe, and when the screw pump stops supplying materials to the trolley, the ball valve is automatically opened, so that slurry in the screw pump is always kept in a flowing state; and the slurry is prevented from standing and depositing inside after the screw pump stops feeding, so that the risk of coating blockage can be reduced, the product quality is improved, the degree of wear of a dry material to the screw is reduced, and the maintenance cost of the screw is greatly reduced.

The invention belongs to the technical field of oil field oil extraction equipment, and particularly discloses a physical desorption silt prevention screw oil extraction system which comprises a screw pump body, a silt prevention assembly and a control unit. The screw pump body sequentially comprises a first oil chamber, a second oil chamber and a transmission chamber, the silt prevention assembly is arranged in the first oil chamber and the second oil chamber, and the control unit is electrically connected with the screw pump body and the silt prevention assembly. According to the physical desorption silt prevention screw oil extraction system, silt prevention of the screw pump is achieved through the physical desorption effect and the spiral flow guide silt prevention structure, so that the problem that the pump efficiency is reduced due to sediment attachment is solved, the service life of equipment is prolonged, and the oil extraction efficiency is improved.

The utility model discloses a melt conveying device for aluminum alloy semi-solid pressure casting, which comprises a metal melt storage device, a base and a support pillar, the metal melt storage device comprises a holding furnace and a crucible, the upper surface of the metal melt storage device is provided with a feed port, the lower surface of the metal melt storage device is provided with a discharge port, and the support pillar is arranged on the base. The bottom end of the discharging opening is connected with a screw pump, the screw pump comprises a feeding body, a motor, a gear, a driving shaft, a first driven shaft, a second driven shaft, a pump body, a pull rod and a discharging body, spiral blades are arranged on the surfaces of the driving shaft, the first driven shaft and the second driven shaft and are meshed with one another, and the left end of the screw pump is connected with a conveying pipe. And a discharge hole is formed in the other end of the conveying pipe. By means of the structure, the temperature of molten metal in the conveying process can be kept, solidification is prevented, and the flow speed and conveying pressure of the molten metal can be effectively controlled.

The invention discloses a strong self-suction high-pressure external double-suction double-screw pump which comprises a pump body, a screw pair is arranged in the pump body, the screw pair comprises a driving screw and a driven screw, each of the two screws comprises a rotating shaft, a left helical casing and a right helical casing, the left helical casing and the right helical casing are fixedly arranged on the periphery of the rotating shaft, and the rotating shafts, the left helical casing and the right helical casing are made into a whole; the left spiral sleeve and the right spiral sleeve on each screw are provided with tooth-shaped grooves with the same shape, the thread turning directions of the left spiral sleeve and the right spiral sleeve are opposite, and the surfaces of the tooth-shaped grooves are covered with wear-resistant rubber layers; and the left helical casing and the right helical casing on the driving screw are correspondingly meshed and paired with the right helical casing and the left helical casing on the driven screw. The screw rod pair adopts an integrated design, so that the structural rigidity is enhanced, and the pump can bear higher working pressure; meanwhile, the tooth-shaped groove of the spiral sleeve is covered with the wear-resistant rubber layer, so that fine control over the meshing clearance of the screw is achieved, medium backflow is greatly reduced, and the self-suction efficiency and the volume efficiency are improved.

The invention relates to a cartridge system (16) for a single-screw pump (1), having a cartridge (17) for receiving a medium (M) to be metered and dispensed, a stator arranged at the cartridge (17), which stator cooperates with a rotor unit (8) of the single-screw pump (1) for metering and dispensing the medium (M), and a plug (45) movably supported in the cartridge (17) for sealing the cartridge (17) in a fluid-tight manner, wherein the plug (45) comprises a rotor passage (46) through which the rotor unit (8) is guided.

The invention provides a combined type screw pump stator and a processing device and method for a lining layer of the combined type screw pump stator, and belongs to the technical field of screw pumps. The stator comprises a lining layer made of fiber reinforced composite materials, a metal outer layer wrapping the lining layer and connecting structures arranged at the two ends, and the connecting structures are mechanically connected with the inner layer and the outer layer at the same time and fixedly connect the inner layer and the outer layer into a whole. The machining device comprises a machine tool frame body, a first driving mechanism for driving the mandrel to rotate, a second driving mechanism for driving the winding mechanism to move in the axial direction of the mandrel, and the winding mechanism capable of precisely adjusting the fiber tension and the winding path. Through the unique composite structure design and mechanical connection mode, the problems that a traditional rubber lining stator is prone to aging and debonding and an all-metal stator is poor in sealing performance are solved, and the stator has excellent wear resistance and corrosion resistance and high structural reliability.