18897 results about "Reciprocating motion" patented technology

The invention discloses a device for measuring flowability of explosive modeling powder, which comprises a step-press-loading analogue unit, a timing and weighing unit and a computer control unit, wherein the step-press-loading analogue unit directly and indirectly drives a screw rod which extends into a blanking bin to rotate and perform reciprocating movements along an axial line and drives a pusher dog in the blanking bin to perform the reciprocating movements along an arc section through the combined action of a cylinder and a pneumatic reversal valve so as to ensure that the explosive modeling powder in the blanking bin falls into the timing and weighing unit, and the process more truly imitates an explosive conveying process of an explosive step-press process. The timing and weighing unit transmits a weighing value of the explosive modeling powder which falls in the timing and weighing unit to the computer control unit in real time, and the computer control unit calculates the instantaneous flow speed of the explosive modeling powder of a north side and generates a flow speed-time curve according to sampling data. The device can measure the flowability of the explosive modeling powder so as to provide an objective basis for choosing a proper explosive step-press process for the explosive modeling powder.

A fluid end, includes a plunger reciprocating within a first bore, the plunger increasing a pressure of a fluid within a pressure chamber. The fluid end also includes a second bore. The fluid end further includes a plug assembly associated with the second bore. The plug assembly includes a plug body positioned within the second bore. The plug assembly also includes a lock ring positioned, at least in part, within the second bore, the lock ring positioned to be driven radially outward responsive to a longitudinal force applied to the plug body.

A fluid end, includes a plunger reciprocating within a first bore, the plunger increasing a pressure of a fluid within a pressure chamber. The fluid end also includes a second bore. The fluid end further includes a plug assembly associated with the second bore. The plug assembly includes a plug body positioned within the second bore. The plug assembly also includes a lock ring positioned, at least in part, within the second bore, the lock ring positioned to be driven radially outward responsive to a longitudinal force applied to the plug body.

The utility model relates to the technical field of sludge dewatering, and discloses a pump-assisted pressurizing stacked screw type sludge dewatering machine, which comprises a dewatering machine main body and a flocculation box, the dewatering machine main body comprises a mounting rack, a mounting frame is fixedly mounted on the upper side of the mounting rack, a filter cartridge is fixedly mounted in the mounting frame, a rotating shaft is rotatably mounted in the mounting frame, and the flocculation box is fixedly mounted in the mounting frame. Spiral propelling blades are fixedly mounted on the surface of the rotating shaft, and a dewatering motor is fixedly mounted at the end of the mounting frame. According to the sludge dewatering machine, the pressure box is arranged at the end of the filter cartridge, the piston is arranged in the pressure box, sewage is pumped and injected into the filter cartridge through reciprocating motion of the piston, the internal pressure of the filter cartridge is increased, when the rotating shaft rotates, the spiral propelling blade and the rotating disc are driven to rotate synchronously, and the spiral propelling blade rotates to extrude and dewater sludge; the rotating disc rotates and acts on the piston through transmission of the transmission rod, so that the pump-assisted pressurizing dehydration effect is achieved, and the sludge dehydration processing efficiency is greatly improved.

A fluid end includes a housing having a bore extending toward a cavity and a wear sleeve positioned within the bore. The fluid end also includes a plunger positioned within a plunger bore extending through the wear sleeve, the plunger reciprocating within the plunger bore. The fluid end further includes a wear sleeve retainer coupled to the housing and positioned to block axial movement of the wear sleeve, the wear sleeve retainer having external threads along a body that engage internal threads formed in the housing. The fluid end also includes an anti-rotation system, coupled to the housing, the anti-rotation system engaging the wear sleeve retainer to block rotation of the wear sleeve retainer in at least one direction. The fluid end further includes a packing nut coupled to the wear sleeve retainer.

The invention discloses an on-line swing type adjustable magnetic rod for magnetron sputtering. The on-line swing type adjustable magnetic rod comprises a shell assembly, a magnet yoke assembly and an adjusting assembly. The shell assembly is provided with a containing cavity, and the magnet yoke assembly is located below the shell assembly. The adjusting assemblies are independently controlled, are arranged in the length direction of the magnet yoke assembly and are arranged in the containing cavity. The output end of each adjusting assembly is perpendicular to the magnet yoke assembly to do linear reciprocating motion, penetrates out of the side wall of the containing cavity towards the side where the magnet yoke assembly is located and is hinged to the magnet yoke assembly so as to drive the magnet yoke assembly to partially or completely change the distance between the magnet yoke assembly and the surface of the sputtering target. The multiple adjusting assemblies are arranged, the adjusting assemblies and the magnet yoke assemblies are provided with the multiple connecting point positions, the output ends of the adjusting assemblies act to drive the magnet yoke assemblies at the corresponding point positions to locally change the distance between the magnet yoke assemblies and the surface of the sputtering target (close to or away from the surface of the sputtering target), and then the local magnetic field intensity is adjusted; the real-time online control on the coating thickness of the surface of the sputtering target is realized, so that the coating thickness of a coating product tends to be consistent.

A cage-type dual wedge throttle valve, comprising: a housing having an inner cavity; a valve cover arranged at the top of the housing; a valve seat arranged in the inner cavity, wherein the valve seat comprises an outer valve seat and an inner valve seat, and a plurality of flow holes are distributed on the peripheral wall of the outer valve seat; a valve core, which comprises two wedge-shaped surfaces and two cylindrical surfaces which are axially symmetrically arranged about the central axis, wherein the cylindrical surfaces face the direction in which a fluid flows into the inner cavity, and the cylindrical surfaces can fit the inner wall of the inner valve seat; and a valve stem having the two ends respectively connected to a driving device and the valve core, wherein under the driving of the driving device, the valve stem can drive the valve core to reciprocate in the valve seat in the axial extension direction of the valve stem. By means of the above solution, primary throttling is achieved when a fluid passes through the outer valve seat, and secondary throttling is achieved as the valve core gradually extends into the inner valve seat; moreover, the valve core comprises wedge-shaped surfaces, and a long throttling stroke is formed, thereby improving the throttling switching performance of the throttle valve; the symmetrical arrangement of the two wedge-shaped surfaces can balance the pressure on the two sides, thereby improving the stability of the valve core under force.

The invention belongs to the technical field of rolling linear guide rail pair tests. According to the service life and rated dynamic load test bed for the rolling linear guide rail pair and the working method, a guide rail is installed on a bed body, and a guide sliding block is slidably connected to the guide rail in a matched mode; the loading measurement assembly comprises a workbench, a quick-change tool and a to-be-measured guide rail, and the to-be-measured guide rail is installed on the workbench through the quick-change tool; the dragging assembly is fixed to one end of the lathe bed, a movable part of the dragging assembly is connected with the workbench, and the workbench is installed on the guide sliding block and can slide along the guide sliding rail under driving of the dragging assembly. The portal frame is arranged on the upper portion of the lathe bed, and the loading unit and the measuring unit of the loading measuring assembly are arranged on the portal frame. The device is simple in structure and high in stability, the reciprocating motion of the loading test assembly is strong, the loading requirement is met, stable measurement of loading force and dragging force is achieved, real-time measurement of temperature and vibration in the measurement process is achieved, and the measurement precision is guaranteed.

The invention provides automatic dust suppressant spraying equipment for building interior construction, and belongs to the field of environmental protection treatment. Comprising a fixing plate, a connecting plate is arranged at the front end of the fixing plate, a round block is arranged at the front end of the connecting plate, a spray head is fixedly connected to the front end of the round block, a hose is fixedly connected to the outer surface of the round block, and a position reciprocating assembly used for reciprocating the position of the spray head is arranged on the fixing plate. The position reciprocating assembly enables the nozzle to perform left-right reciprocating motion for spraying, the angle reciprocating assembly is synchronously started to perform up-down reciprocating motion on the angle of the nozzle, so that the dust suppressant can cover a higher area and a lower area, and the position reciprocating assembly is matched to realize omnibearing coverage of a target area; the dust suppressant can be evenly sprayed to all corners, the wind power is monitored through the monitoring assembly, the device can conveniently carry out dust falling treatment on dust in the air in time, and therefore the dust suppression effect is improved.

The invention discloses a waste gas treatment device for a chemical plant, and belongs to the technical field of waste gas treatment. In order to solve the problem that filler balls in a filler layer are difficult to orderly adjust in the prior art, the technical scheme is provided as follows: the device comprises a spray tower and a circulating water tank arranged at the bottom end of the spray tower, and a circulating water pump used for circulating flow of treatment liquid is mounted at the top of the circulating water tank. The waste gas treatment unit is arranged in the spray tower, and an inner sleeve in the filler layer mechanism drives a paving plate to move under the action of the driving mechanism, so that filler balls arranged in the filler layer mechanism are disturbed, the filler balls are efficiently and comprehensively rearranged in the filler layer mechanism; the adjusting piece is driven to move in the moving process of the inner sleeve, so that the hollow cover is extruded, reciprocating motion of the knocking piece is achieved under the action of the reset spring, rearrangement of the filler ball in the filler layer mechanism is assisted under the action of the knocking piece, and cleaning of impurities is accelerated.

A fluid end includes a housing having a bore extending toward a cavity and a wear sleeve positioned within the bore. The fluid end also includes a plunger positioned within a plunger bore extending through the wear sleeve, the plunger reciprocating within the plunger bore. The fluid end further includes a wear sleeve retainer coupled to the housing and positioned to block axial movement of the wear sleeve, the wear sleeve retainer having external threads along a body that engage internal threads formed in the housing. The fluid end also includes an anti-rotation system, coupled to the housing, the anti-rotation system engaging the wear sleeve retainer to block rotation of the wear sleeve retainer in at least one direction. The fluid end further includes a packing nut coupled to the wear sleeve retainer.

The invention provides a multifunctional cycle power generation system and method by a gravity lever. The system comprises a supporting rack and a balance weight arranged on the supporting rack and slidably matched with the supporting rack, wherein engines are arranged on one side or two sides of the balance weight; the input shaft of each engine is connected to a transmission shaft; two or more single-directional clutches are fixedly connected to the middle of the transmission shaft; the locking directions of the single-directional clutches are same, gears are fixed to the peripheries of thesingle-directional clutches, and a rack matched with each gear to drive the transmission shaft to rotate is arranged next to each single-directional clutch; at least one pair of racks is arranged on the upper part and the lower part, separately, the racks and the balance weight which reciprocates are in driving movement and the balance weight is arranged on the supporting rack to swing through a lifting mechanism in a reciprocating manner. As the balance weight which swings in the reciprocating manner pulls the racks to drive the transmission shaft to rotate in the single direction, multiple engines can be driven synchronously to generate electricity synchronously, and the power needed by a supporting rack lifting device is alleviated greatly by means of a swing mode like to a lever, so that the energy sources are saved and the power generation efficiency is improved greatly.

The invention discloses a full-automatic cold pilger mill, and relates to the technical field of cold pilger mills, the full-automatic cold pilger mill comprises a case and a cold rolling assembly arranged in the case and used for rolling pipe fittings, the case is internally provided with a driving assembly used for driving the cold rolling assembly to work, and the full-automatic cold pilger mill further comprises a water cooling assembly arranged in the case and used for cooling the rolled pipe fittings; the water cooling assembly comprises a water spraying pipe movably connected into the machine box, a telescopic pipe is movably connected into the water spraying pipe, the telescopic pipe and the cold rolling assembly are connected through a fixing base, the characteristic that the machine frame reciprocates left and right is utilized, a cooling liquid outlet moves from right to left, and therefore the spraying range of pipe fittings is enlarged, and the spraying efficiency is improved. Meanwhile, the cooling liquid can be sprayed on the surface of the pipe fitting from the periphery, so that the spraying range of the cooling liquid on the surface of the pipe fitting is further expanded, the surface of the pipe fitting is cooled uniformly, the spraying of the cooling liquid is free of omission and dead angles, the cooling effect of pipe fitting rolling is ensured, and the cold rolling quality of the pipe fitting is ensured.

The present invention discloses an LWP angle flow measurement and control valve with anti-residue on the inner wall, which belongs to the technical field of flow measurement and control valves, and comprises a flow actuator, wherein the lower surface of the flow actuator is connected to a flow controller, and the right side surface of the flow controller is connected to a water inlet pipe, and the lower side surface of the flow controller is connected to a water outlet pipe; a rotating shaft is arranged inside the water outlet pipe, and a second cleaning component is arranged inside the water outlet pipe, and the second cleaning component comprises a cleaning plate arranged inside the water outlet pipe, and the cleaning plate reciprocates inside the water outlet pipe when working. For the LWP angle flow measurement and control valve with anti-residue on the inner wall, when the water inlet pipe is working, the water wheel will drive the connecting shaft to rotate, and when the connecting shaft rotates, it will drive the brush plate to clean the inner wall of the water inlet pipe, and at the same time, the cleaning plate will make reciprocating linear motion on the inner wall of the water inlet pipe, and at this time, the cleaning plate can also clean the inner wall of the water inlet pipe, thereby optimizing the anti-residue effect and preventing scale nodules.

The invention relates to the field of medical material detection, in particular to a silicone tube performance detection device which comprises a pedestal, an air tightness detector is fixedly mounted on the upper side of the pedestal, an L-shaped frame is rotatably arranged at the left end of the upper side of the pedestal, and a dynamic mechanism used for continuously changing the curvature of a silicone tube is arranged on the L-shaped frame. According to the device, the two scissor plates which synchronously and reversely move are adopted to drive the clamping rollers on the scissor plates to extrude the corresponding parts of the silicone tube in a reciprocating manner, and the T-shaped block is linked to drive the fixed ring frame to drive the extrusion position of the silicone tube to reciprocate, so that the bending curvature of the silicone tube is continuously changed in a reciprocating manner; the dynamic curvature change caused by the fact that one end of the silicone tube is fixed and the other end of the silicone tube reciprocates in the actual working condition is accurately simulated, the repeated bending accelerated aging process is effectively reproduced, and the bending position can be adjusted by rotating the L-shaped frame.

The invention relates to the technical field of grinding machines, and discloses a surface grinding machine which comprises a rotary type grinding mechanism and a linkage type pressure applying mechanism. A hollow rotating column which can rotate along with the second butt-joint plate and is in a hollow state, a fifth butt-joint plate which can axially move along the hollow rotating column and rotate along with the hollow rotating column, and a spiral spring which generates downward elastic pressure on the fifth butt-joint plate are arranged in the second butt-joint plate. According to the surface grinding machine, the basic circular motion type grinding effect of the plane grinding disc on the surface of an object is utilized, and the relative motion of the built-in grinding block around the petal-shaped closed sliding groove is combined, so that the grinding block can generate radial reciprocating motion relative to the rotating axis on the surface of the object, and the grinding efficiency of the object is improved; the two kinds of grinding movement are from the same driving motor, and therefore the effective utilization rate of the driving motor can be effectively increased.

The invention relates to the technical field of galvanized sheet laser thickness measurement, in particular to a galvanized sheet laser thickness measurement device and method, which comprises a base, an overhead frame is fixedly mounted on the upper side of the base, a detection table is fixedly mounted on the overhead frame, and a fixing assembly is fixedly mounted on the inner wall of the detection table. A first-stage moving opening is formed in one side of the detection table, a thickness measuring assembly is slidably installed in the first-stage moving opening, and stable sliding rods are fixedly installed on the upper side and the lower side of the detection table; the output end of a cleaning motor drives a secondary driving threaded rod to rotate, the secondary driving threaded rod drives a cleaning moving block to move, the cleaning moving block drives a corresponding cleaning box to horizontally move through two transmission rods, and two driving blocks drive a corresponding reciprocating frame to reciprocate. And the cleaning scraper performs high-frequency staggered scraping, so that an oxide layer on the surface of the galvanized sheet is cleaned, and the accuracy of thickness measurement data is improved.

Disclosed in the present disclosure are a feeding apparatus, a feeding method, and a battery assembly line. The feeding apparatus comprises a material rack, a workpiece conveyor line, and a transfer mechanism, wherein the material rack is provided with at least two layers of bearing portions, which are arranged in sequence at intervals in a first direction, the bearing portions on the same layer define a workpiece bearing space for accommodating a workpiece, and the bearing portions can perform reciprocating motion in the first direction along with the material rack; the workpiece conveyor line is used for conveying the workpiece, the conveying path of the workpiece conveyor line extending in a second direction that intersects with the first direction; and the transfer mechanism is configured to enter and exit the workpiece bearing space, the transfer mechanism being used for transferring the workpiece from the workpiece bearing space to the conveying path of the workpiece conveyor line.

A power tool comprises a housing, a motor assembly and an impact assembly configured to be driven by the motor assembly. The impact assembly comprises a hammer defining a hammer chamber therein and an anvil at least partially disposed in the hammer chamber and configured to rotationally drive an output shaft. The anvil comprises a body portion, an anvil chamber defined therein, and a reciprocating member configured to selectively move radially outwardly relative to the body portion to be selectively impacted by an impact member of the hammer so that the hammer selectively imparts rotational movement to the anvil. The anvil includes an active valve configured to control discharge of fluid from an anvil chamber to the hammer chamber. The active value variably opens based on variance of one or more physical characteristics of the fluid (e.g., at least one of volume, temperature, pressure, or viscosity of the fluid).

The invention discloses tendon rope transmission system performance integrated testing equipment and a transmission system testing method, and belongs to the technical field of robot part testing. The equipment comprises a rack and a performance testing device, wherein the performance testing device comprises a mounting plate provided with an arc-shaped guide rail chute, a core shaft used for simulating a bending radius, a position adjusting mechanism used for accurately positioning the core shaft and clamping a tendon rope jacket, at least one linear driving mechanism capable of adjusting an angle along the chute, and a counterweight mechanism. A clamp of the linear driving mechanism clamps one end of an inner core of the tendon rope, the counterweight mechanism is connected with the other end of the inner core, the middle part of the tendon rope bypasses the mandrel, and the reciprocating motion applied by the linear driving mechanism is matched with the constant tension applied by the counterweight mechanism so as to simulate the working condition of the tendon rope under a specific bending radius and angle.

The utility model discloses a landscape ecological vertical greening structure, which relates to the technical field of landscape ecological vertical greening and comprises a U-shaped base, a trimming unit, a lifting unit for trimming the whole vertical plane and a height fixing unit for adjusting the vertical height according to greening types. The interior of the U-shaped base is hollow, the two ends of the U-shaped base are connected with height adjusting strips in an up-down sliding mode, and the height adjusting strips on the two sides are bound with attachment nets. The trimming unit comprises vertical grooves symmetrically formed in the exteriors of the two sides of the two height adjusting strips, the vertical grooves penetrate through the two sides of the U-shaped base, and the interiors of the vertical grooves are slidably connected with groove pulleys; the reciprocating moving plate drives the T-shaped cutter strip on the reciprocating moving plate to do horizontal reciprocating motion, plants climbing on the attachment net can be trimmed, the grooved pulley moves upwards, the trimming strip moves upwards synchronously, the vertical face parallel to the whole attachment net is trimmed comprehensively, trimming is more comprehensive, efficiency is higher, and the device is safer and better in effect during use.

The utility model discloses a metal shaft surface grinding device, comprising a box-shaped base, a grinding frame, an outer wall grinding component, an end face grinding component, a positioning flange, an eccentric wheel, a connecting rod, a reciprocating motor and a rotating motor, wherein the top end face of the box-shaped base is rotatably connected with a positioning flange, the positioning flange is fixedly connected to the output shaft of the rotating motor, and the rotating motor is fixedly connected inside the box-shaped base; during the rotation of the reciprocating motor, the grinding frame is driven to vertically reciprocate through the eccentric wheel and the connecting rod, and during the vertical reciprocating motion of the grinding frame, the grinding blocks located on both sides move along the axial direction of the metal shaft, thereby preventing excessive grinding in a local area; the outer wall grinding components arranged on both sides of the grinding frame are used to grind the outer wall of the metal shaft, and the end face grinding components arranged on the top of the grinding frame are used to grind the end face of the metal shaft, thereby reducing damage to the metal shaft caused by errors in manual grinding.

The coffee extraction device comprises a main machine and a brewing mechanism connected to the main machine, a grinding mechanism is arranged in the main machine, and coffee beans entering a grinding cavity are ground into powder through a grinding cutter; the powder pressing mechanism is located above the brewing mechanism and reciprocates along the Z axis under the action of a first driving component; a water supply mechanism; the powder pressing mechanism further comprises a powder pressing device, and the powder pressing device and the brewing mechanism are combined to form a powder pressing channel capable of containing a powder pressing assembly. The powder pressing assembly is movably arranged in the powder pressing device and reciprocates along the powder pressing channel; the powder pressing assembly has a powder pressing stroke and a reset stroke in opposite directions in the powder pressing channel; a sensing device is arranged on the side portion of the powder pressing channel, electrically connected with a circuit system in the main machine and used for sensing the position of the powder pressing assembly and activating when sensing that the powder pressing assembly is in the reset stroke so as to switch on the circuit system in the main machine and supply water to the brewing mechanism.

A tail end driving device for a silica smelting tapping robot belongs to the field of silica smelting and comprises a frame body used for supporting a linear impact mechanism, a chain transmission mechanism and a separable driving mechanism. The chain transmission mechanism provides power for the linear impact mechanism; the linear impact mechanism is arranged on the frame body in a sliding mode and can be driven by the chain transmission mechanism to do linear reciprocating motion. The separable driving mechanism is connected with the chain transmission mechanism and provides power for the chain transmission mechanism. The device is mainly used for discharging process operation of the silica smelting furnace.

Lever action firearms having a linkage assembly for pivotally connecting its action lever to its bolt carrier assembly and associated methods are disclosed. The lever action firearm includes a bolt carrier assembly received in an upper frame and operable to reciprocate between an open position and a closed position. The bolt carrier assembly includes a first pivot. A lower frame defines a magazine well configured to removably receive a box magazine. The lever action firearm includes an action lever movable between a retracted position and an extended position. The action lever includes second and third pivots. The action lever is pivotally connected to the lower frame at the second pivot. The lever action firearm also includes a linkage assembly is pivotally connected to the action lever at the third pivot, wherein the linkage assembly is pivotally connected to the bolt carrier assembly at the first pivot.

The invention relates to the technical field of safety limit switch testing, in particular to a safety limit switch testing method, system and device and a medium. The method comprises the steps that firstly, model information of a to-be-tested switch is acquired, and test parameters are called from a preset evaluation model; by analyzing historical test data of elevator switches of the same batch, a test sequence of actual action point dispersion analysis and target interval dense sampling is established, and a reference action point and a sampling frequency are determined; the system drives the limit switch to move according to the called reference action point and the sampling frequency, the actual action point of the switch is measured, and the system carries out reciprocating motion test at the position of the actual action point to obtain action stability data; meanwhile, high-frequency continuous sampling is carried out in a switch on state to obtain time sequence changes of on-resistance values; and finally, according to the time sequence characteristics of the on-resistance and a preset calculation method, calculating a switch performance index, generating a test result and printing a unique SN label, thereby realizing whole-course tracing of the product.

The invention discloses an intelligent drilling mud pump, and relates to the technical field of mud pump devices, the intelligent drilling mud pump comprises a supporting frame body, the top of the supporting frame body is provided with a mud pump main body, and the mud pump main body is composed of two sets of cylinder barrels, a power assembly, two sets of reciprocating pressure pumping assemblies, a feeding pipe and a discharging pipe. According to the intelligent drilling mud pump, the displacement and efficiency of the pump are improved, the reciprocating frequency of the pump can be reduced through a bidirectional working mode, energy consumption can be reduced, then it can be guaranteed that under the condition that the speed of the power assembly is not changed, reciprocating motion of the reciprocating pressure pumping assembly can do work, single-stroke work of the reciprocating pressure pumping assembly is changed into double-stroke work, and the working efficiency is improved. Therefore, the slurry conveying efficiency can be improved and the cost can be reduced under the condition that the speed of the slurry pump is not changed, meanwhile, in the slurry conveying process, sand and stones in the conveyed slurry can be filtered through the filtering and cleaning assembly, the intercepted sand and stones can be cleaned in time, and the slurry conveying quality can be guaranteed.

The utility model discloses a platform carrier roller type plasma cutting blanking machine, and belongs to the field of cutting equipment. The platform carrier roller type plasma cutting blanking machine comprises a workbench and a plasma cutting machine, the plasma cutting machine is connected to the surface of a supporting frame, and a cleaning assembly is assembled on the inner wall of a conveying roller; the cleaning assembly comprises an air blowing pipe, a limiting block is connected to the outer wall of a limiting rod, a connecting block is connected to the outer wall of the limiting block, and a rubber plug is connected to the outer wall of a connecting shaft. According to the platform carrier roller type plasma cutting blanking machine, through the arrangement of the cleaning assembly, when the conveying rollers rotate, limiting blocks can be pushed to do telescopic reciprocating motion in the air blowing pipes, so that air in the air blowing pipes passes through the surfaces, adjacent to the conveying rollers, of air blowing holes, and waste residues can be effectively prevented from being attached to the conveying rollers; and therefore, severe friction is generated between the workpieces and the conveying rollers, the discharging work of the workpieces is affected, and the overall usability of the device is improved.

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

The invention discloses a cutting device for a trolley frame and a production system of the cutting device, and relates to the technical field of laser cutting equipment.The cutting device comprises a clamping disc, a cutting head, a core rod and a transferring assembly; one end of the core rod is used for being inserted into a pipe fitting to do reciprocating motion, the core rod is coaxially sleeved with the slag scraping ring, the multiple separation nozzles are distributed around the core rod in the circumferential direction at intervals, a cooling channel is formed in the core rod, one end of the cooling channel communicates with the separation nozzles, and the other end of the cooling channel communicates with the separation nozzles. The slag scraping ring comprises a contact part with a soft outer ring, and can axially swing back and forth relative to the core rod; when the core rod extends into the pipe, the contact part swings in the direction close to the separation spray head and drives the opening of the separation spray head to horizontally face the direction deviating from the clamping disc; and when the core rod retreats from the interior of the pipe, the contact part swings in the direction away from the separation nozzle and drives the opening of the separation nozzle to outwards face the radial direction of the core rod. The aluminum alloy pipe fitting cutting device has the effect of improving the aluminum alloy pipe fitting cutting efficiency.