10331 results about "Piston rod" patented technology

The invention provides a multi-dimensional supporting leg structure for lightweight steel ring splicing equipment, and relates to the field of tunnel engineering. The mounting base is fixedly connected with the frame, the telescopic driving mechanism is arranged between the mounting base and the supporting leg assembly, the angle adjusting mechanism is arranged between the cylinder barrel and the mounting base, and the self-locking mechanism is used for locking the cylinder barrel and the piston rod when the driving unit fails. The telescopic driving mechanism is composed of a cylinder barrel, a piston rod and a driving unit, the angle adjusting mechanism is driven through a first rotating shaft and a second rotating shaft which are perpendicular to each other and corresponding rotation, so that the cylinder barrel achieves double-shaft swing adjustment, the self-locking mechanism is composed of a locking rack, a movable tooth claw, a reset spring, an electromagnet and a permanent magnet, and power-on unlocking and power-off self-locking are achieved. According to the structure, the supporting polygon is obviously enlarged under the complex basic condition, the anti-overturning stability of equipment is improved, reliable supporting is kept when a hydraulic system fails, and the safety and adaptability of steel ring splicing operation in a tunnel are improved.

The invention relates to the technical field of medium phase state determination, in particular to a PVT analyzer and method suitable for multi-component fluid medium phase state determination, and the PVT analyzer comprises a determination assembly, a test cylinder, a balance cylinder, a pressurization cylinder, a gas distribution pipeline, a first driving mechanism and a second driving mechanism. The structure is reasonable and compact, combination of gas with various components can be achieved through the multiple gas cylinders and the gas distribution pipeline, mixing of the gas according to the set ratio can be achieved by adjusting the gas distribution valve, the multiple gas cylinders can inject the gas into a rodless cavity of the pressurization air cylinder through the gas distribution valve and the gas distribution pipeline, and the gas injection efficiency is improved. The second driving mechanism drives the piston rod of the pressurizing air cylinder to continuously input gas in the rodless cavity of the pressurizing air cylinder into the rodless cavity of the balance air cylinder through the pressurizing pipeline and the one-way valve, so that the pressure of the rodless cavity of the balance air cylinder can be increased; and the precise gas distribution and gas pre-pressurization functions of multi-component gas can be realized.

The invention discloses a modularized replaceable self-resetting energy consumption type bridge pier anti-collision system, and belongs to the technical field of bridge engineering structure safety. The system includes an annular rubber pad, an annularly disposed damper module, and a shape memory alloy (SMA) tow. The damper module comprises a cylinder body, high-viscosity fluid, a reset spring, a piston and a force transmission plate. The cylinder body is fixed to the pier in a surrounding mode through bolts and rubber pads, the inner wall of the cylinder body is connected with the piston through a reset spring, the piston rod end is hinged to the force transmission plates, and the SMA wire bundles are connected with the force transmission plates. When an external impact load acts on the force transmission plate, the fluid damper provides viscous energy consumption, and the SMA wire bundle, the spring and the rubber pad provide deformation energy consumption; after the collision is finished, the system can be reset to the initial position under the synergistic effect of the SMA wire bundle, the spring and the rubber pad. By means of the modular design, efficient energy consumption and self-resetting can be achieved; and meanwhile, a single damper can be quickly replaced after being damaged, so that the maintenance efficiency and the system recoverability are greatly improved.

The invention relates to the technical field of structural engineering shock isolation, in particular to a quasi-zero stiffness shock isolation device based on hydraulic negative stiffness and a design method thereof. A quasi-zero stiffness shock isolation device based on hydraulic negative stiffness comprises a vertical bearing unit which comprises at least one vertical spring, and the two ends of the vertical spring are connected to the top face of a lower connecting plate and the bottom face of an upper connecting plate respectively; the negative stiffness unit comprises a hydraulic oil cylinder and a piston rod, the piston rod extends into the hydraulic oil cylinder, and the hydraulic oil cylinder and the piston rod are hinged to the lower connecting plate and the upper connecting plate respectively, or the hydraulic oil cylinder and the piston rod are hinged to the upper connecting plate and the lower connecting plate respectively; the distance between the upper connecting plate and the lower connecting plate is increased or decreased to drive the length of the piston rod extending into the hydraulic oil cylinder to change so as to provide negative stiffness. The problems that in the prior art, when a nonlinear vibration isolation system provides negative stiffness in a metal horizontal spring compensation mode, a quasi-zero stiffness working zone is narrow, the bearing capacity is low, and the requirement for installation precision is high are solved.

The invention discloses a two-chuck zero-tailing pipe cutting machine, and relates to the technical field of metal pipe machining equipment, the two-chuck zero-tailing pipe cutting machine comprises a cutting workbench, a clamping device and a feeding chuck, the clamping device is arranged on the cutting workbench, the clamping device comprises a working chuck, a first fixing plate and a second fixing plate, the working chuck is in bolt connection with the first fixing plate, and the first fixing plate is in bolt connection with the second fixing plate; a first sliding plate is in bolted connection with one side of the top of the first fixing plate, a visual sensor is fixed to the middle of the top of the first fixing plate, a first pushing block is slidably connected to the top of the working chuck, a rack is fixed to one side of the first pushing block, and the two sides of the first pushing block are slidably connected with the first sliding plate and the first fixing plate correspondingly. A first clamping jaw is connected to the top of the first pushing block through a bolt, a protection block is fixedly connected to the top of the first clamping jaw, two first air cylinders are arranged in the protection block, a piston rod is arranged in each first air cylinder, and a pressurizing clamping jaw is fixed to the top of each piston rod.

The invention discloses a piston type hydrogen compressor cylinder body, a cylinder body assembly and a hydrogen compressor, and relates to the technical field of hydrogen compressors, the cylinder body assembly and the hydrogen compressor both comprise the cylinder body, the cylinder body comprises a cylinder barrel, the cylinder barrel is provided with a cylinder cover and a piston rod seat, and a cylinder sleeve is lined in the cylinder barrel; the inner end of the cylinder cover extends into the cylinder sleeve and provides radial support for the cylinder sleeve, one end of the cylinder sleeve is supported on the piston rod seat, and the other end of the cylinder sleeve is provided with a sealing assembly. The sealing assembly comprises a main sealing ring and a spring which are arranged in a cavity gap between the cylinder barrel and the cylinder cover, the main sealing ring serves as an axial sealing piece in the cavity gap and is attached to the end of the cylinder sleeve, and the spring is arranged on the side, away from the cylinder sleeve, of the main sealing ring and serves as an elastic supporting structure for supporting the main sealing ring. The direction of supporting force of the spring to the main sealing ring is in the axis direction of the cylinder barrel. The structural design adopted by the scheme is beneficial to guaranteeing the reliability of the hydrogen compressor.

The invention discloses a novel chemical material liquid optical granularity instrument with an anti-corrosion sample pool structure, and relates to the technical field of novel chemical material detection.The novel chemical material liquid optical granularity instrument comprises a pool body and a detection assembly, a sealing cover is arranged at the top of the pool body, a stirring assembly is arranged in the middle of the sealing cover, and the detection assembly is arranged at the top of the stirring assembly; the detection assembly comprises a connecting rod, the top of the stirring assembly is rotationally connected with the connecting rod, and one end of the connecting rod is rotationally connected with a piston rod. The gear set driven by the motor drives the stirring shaft to rotate, so that samples are uniformly mixed by the stirring rod, particle sedimentation is prevented, stirring motion is converted into reciprocating motion of the piston rod by utilizing the connecting rod mechanism, and continuous pumping of a medium is realized by matching with a plurality of one-way valves; meanwhile, the liquid suction head on the stirring rod synchronously sucks samples from different point positions in the rotating process, a dynamic multi-point sampling mode is formed, and accidental errors caused by traditional fixed point sampling are effectively overcome.

The application discloses an automatic assembling machine for piston rod assembly, comprising a rack and a connecting seat locking device, a piston rod clamping device, a sealing assembly detection device, a limiting gasket locking device, a nut locking detection device, a lifting device, a translation device and a central control unit arranged on the rack; the central control unit can control all actions of the connecting seat locking device, the piston rod clamping device, the sealing assembly detection device, the limiting gasket locking device, the nut locking detection device, the lifting device and the translation device. The application has the beneficial effects that: through the automatic design of the cooperation of multiple devices, the high precision, high efficiency and high reliability of the piston rod assembly are realized, and the problems of low efficiency, poor precision and easy damage in traditional manual assembly are effectively solved.

The invention provides a bidirectional synchronous gripper and a gripping method thereof, and relates to the technical field of mechanical equipment.The bidirectional synchronous gripper comprises a base, a guide rail is arranged on the surface of the top of the base, a first connecting block is slidably connected to one side of the guide rail, a second connecting block is slidably connected to the other side of the guide rail, a mounting hole is formed in the surface of the base, and an air cylinder is fixed in the mounting hole; the tail end of a piston rod of the air cylinder is connected with a first connecting block, a first rack is arranged on the side, facing the second connecting block, of the first connecting block in an extending mode and meshed with a gear, and a second rack is meshed with the opposite side, deviating from the first rack, of the gear and fixedly connected with the second connecting block. Clamping assemblies are arranged on the top face of the first connecting block and the top face of the second connecting block correspondingly, the technical problem that long-stroke two-way synchronization precision is insufficient is solved, and the technical effects that long-stroke automatic synchronous clamping is achieved, the overall structure is simplified, and the device is suitable for industrial heavy-load grabbing are achieved.

The invention discloses a horizontal five-axis turning and milling combined machining center, and relates to the technical field of combined machining machine tools. By arranging the composite milling mechanism, the height of the first milling assembly and the height of the second milling assembly can be independently adjusted, the purpose that the first milling assembly or the second milling assembly or the first milling assembly independently participates in the milling operation of the metal part is achieved, the turning mode, the milling mode or the turn-milling mode can be rapidly switched according to the machining requirement, and the machining efficiency is improved. A purging mechanism is arranged, linkage is formed through movement of a push rod, a push plate and a mounting base, and therefore when the clamping disc is turned over, a piston is pushed by a first piston rod and a second piston rod to extrude out air in the air storage cylinder; and the output high-speed air flow blows the surface of the clamping disc through the air blowing holes of the hollow arc-shaped baffle so as to remove residual metal fines, so that the double cleaning effects of overturning dumping and air flow blowing are achieved, the cleaning strength is greatly improved, and the automation degree is high.

The reciprocating compressor comprises a compressor frame, a crankshaft and a connecting rod, connecting the crankshaft to a crosshead. A piston rod connects a piston to the crosshead. The piston reciprocates in a gas compression cylinder. At least one pressure-drop module is positioned between the gas compression cylinder and a crosspiece guide. The piston rod extends from the gas compression cylinder through a pressure-drop chamber of the pressure-drop module. Also disclosed herein is a method of operating a reciprocating compressor.

The utility model belongs to the technical field of shock absorbers, and particularly relates to a hydraulic damping adjusting device of a shock absorber, the shock absorber comprises a hydraulic cylinder and a piston rod sleeved with a piston valve body, the piston valve body divides an inner cavity of the hydraulic cylinder into an upper oil cavity and a lower oil cavity, the piston rod is provided with a throttling channel, and a throttling rod axially slides on the piston rod. A pre-tightening spring is arranged between the throttling rod and the throttling channel, the hydraulic damping adjusting device comprises a hydraulic adjusting end cover, an adjusting cavity is formed in the hydraulic adjusting end cover, and the adjusting cavity and the throttling rod are matched with a hydraulic push rod on the hydraulic adjusting end cover through a plunger to be in transmission connection. According to the utility model, the throttle lever is driven to axially move in a hydraulic mode so as to adjust the flow area of the throttle channel and realize the damping force adjustment of oil flowing, so that the problems of time and labor waste and low adjustment efficiency caused by mechanical transmission matched adjustment are avoided, and meanwhile, the problem of leakage of damping oil in the prior art is effectively solved.

The invention relates to the technical field of constructional engineering quality detection, in particular to crushing equipment for constructional engineering quality detection.The crushing equipment comprises a rack and a workbench used for containing building components, a hydraulic cylinder is fixed to the rack, a piston rod is arranged at the output end of the hydraulic cylinder, a pressing head is fixed to the bottom end of the piston rod, and an upper fixing plate is fixed to the piston rod; a pre-pressing plate capable of moving up and down relative to the upper fixing plate is connected below the upper fixing plate through a first elastic telescopic assembly; two movable frames are symmetrically arranged on the workbench, one side of each movable frame is connected with a clamping arm through a second elastic telescopic assembly, the clamping arms can linearly move relative to the movable frames, a clamping plate is fixed to one side of each clamping arm, and the two ends of each clamping arm are further connected with two L-shaped clamping plates through first linkage structures. The building component is actively and accurately positioned and clamped, so that the position of the component is kept fixed in the whole pressurizing and crushing process, and the accuracy of test data is improved.

The invention discloses a multifunctional integrated power transmission power pole, and relates to the technical field of power transmission devices. Comprising a rod body; the cross arms are all arranged on the pole body, a plurality of connecting shafts are arranged on the cross arms, and the connecting shafts are fixedly connected with mounting shells; the number of the piston rods is consistent with that of the mounting shells, the piston rods are connected to the corresponding mounting shells in a sliding mode, the piston rods are fixedly connected with wire clamps, and the wire clamps are used for fixing cables; the number of the first moving rings is consistent with that of the piston rods, and the first moving rings are connected to the corresponding piston rods in a limiting and sliding mode. The first moving ring is driven by the piston rod to move synchronously, tensile force borne by a cable is buffered, dynamic tensile force generated by shaking of the cable is resolved, rigid impact borne by a rod body fixing point position is reduced, fatigue stress borne by a wire clamp mounting point for a long time is reduced, the probability that the wire clamp is loosened and damaged due to long-term vibration is reduced, and the service life of the wire clamp is prolonged. And the reliability of the whole cable fixing system is improved.

The invention relates to the technical field of screw and bolt performance testing, in particular to a screw and bolt torsion resistance detection device which comprises a workbench, a concave containing groove is formed in the workbench, and a clamping mechanism used for clamping a bolt workpiece is arranged in the containing groove; a guide seat is fixedly mounted on the workbench, a movable frame is slidably connected to the guide seat, an electric push rod is fixedly mounted on the guide seat, an annular pressure sensor is fixedly arranged at the top of the rear side of the movable frame, and a piston rod of the electric push rod slidably penetrates through the rear end of the movable frame and an inner ring of the annular pressure sensor. The top and the middle of a piston rod of the electric push rod are fixedly connected with limiting blocks correspondingly. According to the invention, the rotating ring is matched with the plurality of L-shaped plates, switching mechanisms of different types of bits are carried, and rapid and accurate automatic switching of the bits is realized in combination with the driving part, so that the detection requirements of bolt workpieces with different notch types are met, and the equipment universality and the detection efficiency are improved.

The invention relates to a high-concentration material pump (10) having two delivery cylinders (16, 18), the delivery pistons (34, 36) of which are rigidly connected via a common piston rod (30, 32) to the drive pistons (38, 40) of the associated drive cylinders (26, 28), a delivery operating mode being provided in which the delivery cylinders (16, 18) are driven in a push-pull manner, the conveying cylinders (16, 18) are arranged in order to convey high-concentration substances (58) from the hopper (14) into the conveying line (56) (50) via pipe adapters (24) which alternately connect the conveying cylinders (16, 18), and a cleaning operating mode is provided in which the conveying cylinders (16, 18) are arranged in the conveying line (56) (50). The conveying cylinders (16, 18) together occupy a hopper-side end position and the tubular adapter (24) is alternately connected between the two conveying cylinders (16, 18).

The invention relates to the technical field of wafer processing, in particular to a wafer positioning and clamping concentricity clamping device and method, and the device comprises at least three groups of clamping units. The clamping unit comprises a driving module, a transmission module and a sensing module; the driving module comprises a cylinder and an independent gas circuit for driving the cylinder; the transmission module comprises a multi-connecting-rod mechanism connected with a piston rod of the air cylinder. The movable end of the multi-connecting-rod mechanism is provided with a clamping column used for making contact with the edge of the wafer. The sensing module comprises a position sensor and a thin film pressure sensor. Each clamping unit is provided with an independent electromagnetic valve and an independent gas circuit, closed-loop feedback of a position sensor is introduced, and accurate and synchronous control over the movement tracks of the multiple clamping columns is completed; and a thin film pressure sensor is arranged at a force bearing point of the clamping column, and a self-adaptive force control module of the control system is combined, so that the technical effect that the clamping force is always stabilized in a preset safety range is achieved.

The utility model discloses a fire-fighting reel frame which comprises an installation frame, a winding device is arranged on the installation frame and comprises a motor, an outer gear, an inner gear and a reel frame, the motor is installed on the installation frame, the outer gear is meshed with the inner gear, and a limiting device is arranged on one side of the reel frame. The limiting device comprises an air cylinder, a limiting plate, a piston rod, a linkage rod, a mounting groove, a linkage frame, a linkage ball, a linkage spring, a linkage groove and a linkage block, the limiting plate sleeves the reel frame, one end of the piston rod is connected with the output end of the air cylinder, the linkage rod is mounted on the linkage block, the mounting groove is formed in the inner side of the linkage block, and the linkage frame is mounted on one side of the mounting frame. The linkage ball is arranged in the installation groove, the linkage spring is movably arranged on the outer side of the linkage rod in a sleeved mode, the linkage groove is formed in the inner side of the linkage frame, the linkage block is connected to one side of the reel frame, and the pressing mechanism is arranged on the inner side of the reel frame. The automatic winding device can automatically wind, accurately limit the reel frame and evenly guide and continuously press a fire hose.

The utility model discloses an efficient setting device of a bridge plug, which belongs to the technical field of bridge plug setting devices and comprises a setting component mounted at the top of the bridge plug, the setting component comprises a mounting cylinder sleeved on the outer side of the bridge plug, an electric push rod is fixedly arranged in the mounting cylinder, and the bottom end of a piston rod of the electric push rod extends into the bridge plug. A hollow pipe is detachably connected to the top of the mounting cylinder, a plurality of square through holes are formed in the outer wall of the hollow pipe, a reinforcing rod penetrates through each square through hole, and the four reinforcing rods are connected through a driving assembly. The bridge plug is carried by the mounting cylinder to move to a pipeline plugging position, the electric push rod pushes the mandrel in the bridge plug, pushes the slips and compresses the bridge plug rubber cylinder to achieve setting, meanwhile, the arc-shaped plates abut against the inner wall of the pipeline, deviation of the setting assembly and the bridge plug is avoided, the stability of pushing the bridge plug mandrel by the electric push rod can be improved, and the sealing effect is improved. The structure is simple, and installation is very efficient.

The invention relates to the technical field of flame-retardant rubber sealing element trimming, and discloses trimming equipment for flame-retardant rubber sealing element processing and a using method of the trimming equipment. A discharging assembly for separating a plurality of flame-retardant rubber sealing elements is arranged on the rear side of the top of a box body; a piston rod of a second air cylinder extends, in the process, a second guide column is reset under the action of second telescopic spring force to drive a supporting frame to move, the supporting frame is made to be separated from the bottom of the flame-retardant rubber sealing piece, and at the moment, a first guide column is pushed to drive a partition plate to move; when the supporting frame is separated from the lower portion of the bottom flame-retardant rubber sealing piece, the bottom flame-retardant rubber sealing piece moves to the upper portion of the clamp on the outer side of the sleeve column, discharging of the flame-retardant rubber sealing pieces can be completed, manual discharging by workers is not needed, and the discharging efficiency is improved. And the working efficiency of trimming is effectively improved, and meanwhile, the labor intensity of workers is reduced.

The invention relates to the technical field of welding processing, in particular to an integrated welding device for tray cold plate production, which comprises a truss, a conveying table, a processing table, a carrying mechanism for carrying a tray cold plate on the conveying table to the processing table, and a welding mechanism for welding the tray cold plate, the carrying mechanism comprises a screw fixedly mounted on the truss, a mounting plate in threaded connection with the screw, a clamping plate slidably mounted on the mounting plate, a driving assembly driving the clamping plate to slide in the horizontal direction, a first motor driving the screw to rotate and an air cylinder fixedly mounted on the clamping plate. The push block is fixedly connected with a piston rod of the cylinder; the clamping block is rotationally mounted on the push block; and two groups of clamping blocks are symmetrically arranged. According to the welding device for integrated tray cold plate production, by arranging the carrying mechanism, when a tray cold plate is carried, clamping blocks on the two sides of the tray cold plate and an auxiliary top plate are synchronously driven, and four-side all-around reliable clamping and fixing are achieved.

The utility model relates to monorail crane sports car protection equipment, in particular to an intelligent monorail crane sports car catching device which comprises a fixed tripod and a car catching mechanism. The fixed tripod is fixed to the side wall of a roadway, a left inserting plate and a right inserting plate are arranged below the fixed tripod, a left fixed shaft and a right fixed shaft are arranged in a car catching frame of the car catching mechanism, the left fixed shaft is rotationally connected with a left car catching plate, the right fixed shaft is rotationally connected with a right car catching plate, and a left air cylinder and a right air cylinder are fixed to the upper portion of the car catching frame. A piston rod of the left air cylinder is hinged to the upper end of the left car catching plate, the upper end of the left car catching plate is further hinged to a horizontal left inserting rod, a piston rod of the right air cylinder is hinged to the upper end of the right car catching plate, and the upper end of the right car catching plate is further hinged to a horizontal right inserting rod. When the monorail crane runs, the intelligent car catching device can counteract the running potential energy of the car, so that the running car is stopped in time, and the possibility of accidents after the car runs is reduced.

The invention relates to the technical field of pipe jacking construction, and provides a pipe jacking jacking iron rapid locking and retracting device which comprises a jacking mechanism and O-shaped jacking iron, the jacking mechanism comprises a plurality of jacking jacks, and the ends of jacking piston rods of the jacking jacks are connected with end sockets; a clamping ring is arranged at one end, corresponding to the jacking jack, of the O-shaped jacking iron, a clamping assembly is arranged in the clamping ring, and the clamping assembly comprises a mounting groove, a buckling piece and an elastic piece. When the end of the jacking jack extends into the clamping ring, the buckling piece and the elastic piece are pressed to enter the mounting groove, and when the end of the jacking jack moves to the clamping gap, the elastic piece drives the buckling piece to reset and clamp the end. The clamping ring is further provided with a limiting mechanism used for limiting retraction of the elastic piece. The limiting mechanism comprises a limiting base, a limiting ratchet wheel, a limiting pawl and a limiting driving piece. The pipe-jacking jacking iron and the jacking jack can be rapidly and stably connected, and the effect that in the pipe-jacking construction process, the O-shaped jacking iron needs to be frequently and secondarily hoisted is effectively improved.

A shock absorber (SA; SA1; SA2; SA3) equipped with vehicle height adjustment according to the present invention comprises: a shock absorber body (D) containing a cylinder (1), a piston (2) inserted into the cylinder (1) such that it is movable in an axial direction and divides the interior of the cylinder (1) into an expansion-side chamber (R1) and a compression-side chamber (R2) filled with a fluid, a piston rod (3) inserted into the expansion-side chamber (R1), movable in the axial direction relative to the cylinder (1) and connected to the piston (2), and an outer tube (5) surrounding the cylinder (1); a separating element (30;301), that the interior of the outer tube (5) is divided into a container (T) and a reservoir (R), the container (T) storing fluid, the reservoir (R) is connected to the compression-side chamber (R2) to compensate for a volume of the piston rod (3) entering and exiting the interior of the cylinder (1); a pump (31) provided at the separating element (30; 301) which supplies and discharges the fluid through the reservoir (R) into the interior of the cylinder (1); and a damping force adjusting valve (18) provided at the separating element (30; 301) configured to adjust a damping force during expansion and compression of the shock absorber body (D).

The application discloses a kind of valve automation welding tool, it is related to valve welding technical field.The present application includes bottom plate, the surface of the bottom plate is slidably connected with mounting bracket and the hollow sliding box in the inside, the upper surface of the bottom plate is fixedly connected with installation box, the top of installation box is fixedly connected with welding robot for welding, the upper surface of the bottom plate is fixedly connected with air cylinder, and one end of air cylinder piston rod is fixed with mounting bracket;The side of the sliding box is fixedly connected with suction hood, and the side of the suction hood is fixedly connected with corrugated pipe for air extraction, the side of the sliding box is rotatably connected with penetrating shaft, and one end of the shaft is fixedly connected with top disc.The present application can receive welding slag by sliding box, prevent welding slag from splashing, improve the safety of the scene, the wind power generated by air extractor can quickly cool the welding slag, reduce the time of dangerous source existence, facilitate people to collect and process, and filter air.

The invention relates to the related technical field of medical instruments, in particular to a contrast injection device for enhancing nuclear magnetic resonance, which comprises a base, a mounting shell arranged at the upper part of the base, a first barrel arranged at the left upper part in the mounting shell, a second barrel arranged at the right upper part in the mounting shell, and a mixing barrel arranged in the middle of the upper part of the mounting shell, a first piston rod is arranged in the first barrel, a second piston rod is arranged in the second barrel, communicating pipes are respectively communicated between the first barrel and the mixing barrel and between the second barrel and the mixing barrel, a one-way water inlet pipe is arranged at the top of the barrel, and the one-way water inlet pipe is communicated with an external liquid storage tank. By rotating the adjusting screw rod, the adjusting screw rod drives the first wedge-shaped block to move to the position of the needed dosage, then the rodless air cylinder controls the extrusion plate to move upwards, and after the extrusion plate moves upwards and makes contact with the plate body, the piston rods move upwards to inject the contrast agent and normal saline of the corresponding dosage into the mixing barrel to be mixed.

The invention belongs to the field of piston rod machining, and particularly relates to a piston rod machining technology which comprises the steps that according to the rod diameter, length and mechanical property requirements of a piston rod finished product, a wire of a corresponding specification is selected, the wire is cut into a blank of a preset length through cutting-off equipment, and the machining allowance of follow-up procedures is reserved for the length of the blank; and a pre-punching forming die is adopted for punching the upper end of the blank, so that the upper end of the blank forms a preliminary outline matched with the preset appearance of the head of the piston rod, meanwhile, the lower end of the blank is extruded through a lower die with a chamfer forming groove, and an annular bottom chamfer is formed at the lower end of the blank. Therefore, independent operation by working procedures is not needed, the time cost of working procedure switching and the frequency of equipment adjustment are reduced, and the problems that in an existing cold extrusion process, the working procedures of rod part machining and threaded hole machining are dispersed, and the production efficiency is low due to the fact that blanks need to be transferred for multiple times are solved.

The flushing valve comprises a valve body and a pressure sensing assembly, the valve body is provided with a water inlet end, a water outlet end and a water passing cavity communicated with the water inlet end and the water outlet end, one side of the valve body is provided with a pressure sensing channel, the pressure sensing channel is communicated with the water passing cavity, and the pressure sensing assembly comprises a piston rod, an elastic piece and a potentiometer. The piston rod is arranged in the pressure sensing channel and arranged in the axial direction of the pressure sensing channel, the elastic piece provides axial elastic force for the piston rod, the direction of the elastic force is opposite to the water inlet direction of the pressure sensing channel, a movable contact of the potentiometer is connected with the piston rod, and water pressure in the pressure sensing channel can drive the piston rod to overcome the elastic force to push the movable contact. Water enters the pressure sensing channel and pushes the piston rod, the piston rod compresses the spring and pushes the potentiometer, the resistance voltage of the potentiometer generates related changes, and water pressure detection is achieved.

The invention relates to the technical field of hydraulic cylinders, and particularly discloses a double-seal adjustable hydraulic oil cylinder leakage-proof mechanism and a hydraulic oil cylinder thereof.The double-seal adjustable hydraulic oil cylinder leakage-proof mechanism comprises a cylinder barrel, a piston rod is slidably arranged in the cylinder barrel, a sleeve shell is arranged in the cylinder barrel, the outer surface wall of the piston rod is sleeved with the sleeve shell, and a first sealing ring is arranged in the sleeve shell; the outer surface wall of the piston rod is sleeved with the first sealing ring, multiple sets of adjusting screw rods are rotationally arranged at the upper end of the sleeve shell, the end, away from the sleeve shell, of each set of adjusting screw rod is in threaded connection with the cylinder barrel, multiple sets of sealing assemblies are arranged at the upper end of the cylinder barrel, and each set of sealing assemblies is matched with the corresponding adjusting screw rod; and a second sealing ring and a third sealing ring are embedded in the cylinder barrel. The maintenance difficulty is reduced, equipment does not need to be disassembled, slight leakage of hydraulic oil caused by long-time telescopic movement can be rapidly eliminated, the sealing performance of the hydraulic oil cylinder is improved, and meanwhile the maintenance cost is reduced.

The utility model discloses a remote controller silica gel button punching device which comprises a working table, an air cylinder, an upper die, a lower die and a gasket, the air cylinder is vertically and downwards arranged on the working table, the upper die is connected with a piston rod of the air cylinder, the lower die is fixedly arranged on the working table and located under the upper die, and the gasket is arranged on the working table. The gasket is arranged between the upper die and the lower die, one end of the gasket is rotationally connected with the side face of the lower die, a plurality of supporting pieces are arranged on the lower die, a containing hole is formed in the gasket, and when the gasket is attached to the lower die, the supporting pieces are located in the containing hole. According to the punching device, the gasket capable of rotating around the lower die is additionally arranged on the lower die, and after the punching device punches the remote controller silica gel keys, silica gel waste can be easily pulled out of the lower die by rotating the gasket, so that the difficulty of cleaning the silica gel waste on the lower die by an operator is reduced, and the production efficiency is improved.