1387 results about "Piston cylinder" patented technology

The utility model belongs to the technical field of hydraulic execution components, and particularly relates to a hydraulic cylinder sleeve type connector which comprises a hydraulic cylinder sleeve body, a pipeline connecting piece is fixed at the upper end of the hydraulic cylinder sleeve body, an upper connecting piece is fixed inside the pipeline connecting piece, and a sealing ring is fixed at the lower end of the upper connecting piece. A centering conical barrel is fixed to the lower side of the hydraulic cylinder sleeve body, symmetrical locking hydraulic cavities are formed in the lower end of the interior of the hydraulic cylinder sleeve body, hydraulic cylinder covers are fixed to the upper ends of the symmetrical locking hydraulic cavities, limiting grooves are formed in the left side and the right side of an upper connecting piece, clamping jaws are arranged in the two limiting grooves, and a clamping block is arranged in the clamping jaws. The hydraulic piston cylinder moves to drive the piston connecting rod to move, so that the piston connecting rod drives the driving ring plate on the side wall to move, the driving ring plate is matched with the clamping jaw, the upper connecting piece and the lower connecting piece are clamped, locking and unlocking are easier, and the locking effect is better.

The invention discloses multifunctional lead brick extrusion equipment with a replaceable mold, relates to the technical field of lead processing, and aims to solve the problems of production stagnation and economic loss caused by idle equipment due to long consumed time of the whole process when the mold is replaced in the prior art, the multifunctional lead brick extrusion equipment comprises a base, and the top of the base is fixedly connected with a plurality of guide frames; the outer wall of the guide frame is slidably connected with a pair of symmetrically arranged extrusion plates, the bottom of the extrusion plate on the lower side is fixedly connected with the top of the base, the top of the guide frame is fixedly connected with a top cover, and the bottom of the top cover is fixedly connected with a hydraulic rod; and the other end of the hydraulic rod is fixedly connected with the top of the extrusion plate on the upper side, a pair of piston cylinders are arranged on the top of the base, and corresponding molds are arranged on the opposite faces between the extrusion plates. The method has the advantage that the idle time of equipment caused by die replacement is greatly shortened.

The invention relates to a bridge abutment settlement deformation monitoring device and method, and belongs to the field of bridge monitoring, the bridge abutment settlement deformation monitoring device comprises two bearing frames arranged on one side of a bridge pier and a steel wire rope I arranged between the bearing frames and used for supporting a connecting support, and the top of the connecting support is provided with a monitoring mechanism; the monitoring mechanism comprises a plurality of piston cylinders adjustably arranged at the top of the connecting support, piston push rods are slidably arranged at the tops of the piston cylinders, extension rod pieces fixedly connected with the piston push rods are fixedly arranged on one side of the pier, and display sleeves are fixedly arranged on the two sides of the connecting support. The display sleeve is communicated with the piston cylinder body through a connecting pipeline and used for transmitting liquid prefabricated in the piston cylinder body, and a piston sliding block is arranged in the display sleeve in a sliding mode. The double steel wire ropes and the tension jack form an elastic supporting system to buffer vibration, the hydraulic linkage design converts tiny settlement into visual displacement, the spring reset mechanism is matched to improve data reliability, automatic reset is achieved, continuous monitoring is supported, and the monitoring range is expanded.

The invention discloses a preassembled shockproof box-type transformer substation, and relates to the technical field of transformer substations, the preassembled shockproof box-type transformer substation comprises a transformer box and a base, damping mechanisms are arranged on the two sides of the base, the damping mechanisms are connected with the side edges of the base through mounting plates, the damping mechanisms are self-adaptive hydraulic damping mechanisms, and each damping mechanism comprises a piston cylinder, a buffer rod, a trigger assembly and an adjusting assembly; the piston cylinder is filled with hydraulic oil and provided with a piston disc dividing an inner cavity of the piston cylinder into an upper cavity and a lower cavity, the upper end of the buffer rod is connected with the piston disc, and the lower end of the buffer rod extends out of the piston cylinder and is provided with a contact block. The problems that in the prior art, when a power transformation box is installed, due to the fixed damping characteristic, a traditional spring shock absorber cannot be adjusted in a self-adaptive mode to adapt to the variable falling speed and the box body weight, and the buffering effect is mismatched with the impact working condition are solved. The device has the advantages that impact energy of different intensities is effectively dissipated through a multi-stage buffering and automatic adjusting mechanism, and the safety of electrical elements in the box-type substation during installation and operation is ensured.

The invention relates to the technical field of industrial water treatment equipment, and discloses an intelligent flushing self-cleaning filter system for industrial water treatment. A dynamic suspended matter monitoring module of the system collects three-dimensional distribution data of deposits on the surface of a filtering medium in real time, and mixed deposition characteristics of suspended solids and oil stains are recognized through a multispectral imaging technology; the differential pressure trigger control module establishes a mapping relation between sediment thickness and fluid resistance according to the three-dimensional distribution data, and generates a cleaning trigger instruction when the real-time differential pressure data reaches a dynamic threshold interval; the spiral trajectory planning module analyzes the cleaning trigger instruction, and generates a composite motion trajectory containing a rotation angular velocity and an axial displacement rate in combination with the current position of a suction nozzle and a filter screen topological structure; the multi-mode flushing execution module synchronously adjusts torque output of a hydraulic motor and linear displacement of a piston cylinder based on the composite motion trail, so that a suction nozzle covers the whole effective filtering area of a filter screen along a spiral path.

The present application provides an oil-gas separation apparatus capable of implementing complete degassing and methods. The apparatus comprises: a piston cylinder and a degassing cylinder, a degassing solenoid valve being arranged between the degassing cylinder and the piston cylinder, one end of the degassing solenoid valve extending into the interior of the piston cylinder, and the other end thereof being in communication with the degassing cylinder; a variable speed diaphragm pump, an air intake end thereof being in communication with the atmosphere and an air discharge end thereof being in communication with the degassing cylinder for drawing ambient air, and used for cleaning a gas path of the oil-gas separation apparatus, and providing power for the degassing cylinder, thereby replacing a design involving a carrier gas cylinder or a gas generator; and a main control module. According to the present application, the piston cylinder, the degassing cylinder, the degassing solenoid valve, and the variable speed diaphragm pump are integrated and are uniformly controlled by the main control module, so that high-efficiency oil and gas separation is implemented. A unique degassing control method and a concentration calculation method are designed, so that fast and efficient degassing is implemented, nearly complete degassing is achieved without correcting a degassing rate, a mathematical model for inverse calculation of an oil sample concentration on the basis of a gas concentration is simplified, and concentration conversion is convenient.

The utility model relates to the technical field of buffering protection, and discloses a spring hydraulic buffering protection device which comprises a damping piston cylinder and a piston rod, the damping piston cylinder is matched with the piston rod, a collided head is installed at the top of the piston rod, an elastic buffering cap is installed at the top of the collided head, a thrust spring is sleeved outside the piston rod, and the elastic buffering cap is sleeved outside the piston rod. The two ends of the thrust spring are fixed to the top of the damping piston barrel and the bottom of the elastic buffer cap respectively, the elastic buffer cap is made of high-elasticity materials and can effectively absorb impact force, and the bottom of the piston rod penetrates into the damping piston barrel in a sealed mode. By utilizing the damping characteristic of liquid flow and the elastic deformation of the spring, double buffering on impact force is realized, the stability and durability of the device are obviously improved, the vibration frequency of equipment in high-speed operation is effectively reduced, and the service life of the equipment is prolonged.

The utility model relates to the technical field of regulating valves, and discloses a self-operated high-pressure-difference regulating valve which comprises a pipeline assembly and a buffer assembly installed in the pipeline assembly, the pipeline assembly is fixedly installed on the two sides of a valve assembly, a transmission assembly is fixedly installed on the valve assembly, a feedback assembly is fixedly installed on the transmission assembly, and when equipment operates, the buffer assembly is fixedly installed on the pipeline assembly. Water flow passes through the water pipe and flows into the valve assembly, in the process, the liquid baffle is driven by high pressure to rotate and deviate inwards along the rotating rod, meanwhile, the liquid baffle is driven to rebound to the original position under the rebound effect of the rebound spring, part abrasion caused by a water hammer is avoided, meanwhile, liquid pressure is conducted to an inner cavity of the piston cylinder through the communicating pipe, and the valve element and the valve rod are driven to be pressed downwards; in the downward pressing process, the through hole in the communicating position of the through groove and the valve element is gradually reduced, and therefore flowing hydraulic pressure is adjusted more smoothly and stably.

The utility model discloses a guiding structure and a magneto-rheological damper with the guiding structure, and relates to the technical field of guiding structures, the guiding structure comprises a guiding sleeve, a dustproof sealing ring, a guiding bearing, a buffering sealing ring and a static sealing ring, a dustproof sealing ring is arranged at the outer end of an inner hole of the guide sleeve, a buffering sealing ring is arranged at the inner end of the inner hole of the guide sleeve, the inner diameters of the dustproof sealing ring and the buffering sealing ring are matched with the piston rod, a static sealing ring is arranged between the guide sleeve and a cylinder body of the piston cylinder, and a guide bearing is arranged on the inner side of the buffering sealing ring. The buffering sealing ring can prevent iron powder particles from entering the guide sleeve, abrasive particle abrasion to the guide bearing is prevented, the service life of the guide sleeve and the service life of the guide bearing are prolonged, the sealing reliability is improved through two-end sealing, and friction force between the guide sleeve and the piston rod is reduced; assembly operation is simple, the device is suitable for automatic assembly production, the structure is simple, parts are few, and the production cost can be greatly reduced.

The utility model provides a piston cylinder body and a vehicle suspension device, comprising: a front suspension lifting component comprising a first cylinder body and a first piston, the first piston forming a first air chamber and a first oil chamber in the first cylinder body; the first high-pressure gas storage tank is communicated with the first gas cavity through a first connecting pipe; the rear suspension lifting component comprises a second cylinder body and a second piston, and the second piston enables a second air cavity and a second oil cavity to be formed in the second cylinder body; the second high-pressure gas storage tank is communicated with the second gas cavity through a second connecting pipe; the first high-pressure gas storage tank and the second high-pressure gas storage tank are communicated with the high-pressure gas pump through a first pipeline and a first communicating pipeline, the first pipeline is provided with a second valve, and the first communicating pipeline is provided with a first valve. Buffering and damping effects of the left suspension and the right suspension can be adjusted so as to meet requirements of different road conditions, and driving experience of users can be improved.

The invention discloses a multistage buoyancy adjusting device and method for an underwater vehicle, and relates to the technical field of buoyancy adjustment. The multistage buoyancy adjusting device comprises a piston cylinder type buoyancy adjusting assembly and an oil bag type buoyancy adjusting assembly; wherein the oil bag type buoyancy adjusting assemblies are integrally and annularly distributed on the periphery of the piston cylinder type buoyancy adjusting assembly, each oil bag type buoyancy adjusting assembly comprises a supporting plate, a seat body fixed to the supporting plate, an expansion and contraction bag body frame and a piston suction assembly, and the expansion and contraction bag body frames and the piston suction assemblies are arranged on the seat bodies and used for multi-stage buoyancy adjustment of the underwater vehicle; and the driving rod assembly is arranged on the seat body and is used for controlling the expansion and contraction bag body frame and the piston suction assembly in a linkage manner, so that the expansion and contraction bag body frame realizes buoyancy adjustment of the underwater vehicle through liquid oil transfer. By means of flexible application of two modes of liquid oil transfer and seawater pumping and drainage, multi-stage adjustment of the snorkeling depth of the aircraft is achieved.

A gas tightness test device and test method for a medical instrument. The test device comprises a bottom plate (1), wherein a test chamber (2) is fixedly connected to the top of the inner cavity of the bottom plate (1), a limiting cylinder (3) is slidably connected to one side of the inner cavity of the test chamber (2), a marking ring (4) is slidably connected to the inner cavity of the test chamber (2) by means of a connecting block, and a motor (5) is fixedly connected to one side of the top of the bottom plate (1) by means of a fixing block; and a detection assembly is provided in the inner cavity of the limiting cylinder (3), the detection assembly comprises a movable sealing plug (6), the movable sealing plug (6) is fixedly connected to one end of the limiting cylinder (3), and the inner cavity of the movable sealing plug (6) is in communication with a gas supply pipe (7). The top block (22) is driven by the motor (5) to move to enable the movable sealing plug (6) to move toward the fixed sealing plug (33) to seal and limit the medical instrument, the piston rod (10) is pressed by the top block (22) to allow the gas inside the piston cylinder (8) to be compressed and enter the interior of the medical instrument, and the lead screw (24) rotates to move the marking ring (4) to mark the specific gas leak position.

The utility model provides a piston type air cylinder with a control valve, a clamping mechanism and tool equipment, the air cylinder comprises an air cylinder body and the control valve, the air cylinder body is provided with a cavity, the cavity is internally connected with an air cylinder piston in a sliding mode, and the cavity is divided into an upper cavity body and a lower cavity body by the air cylinder piston; the control valve is used for controlling the air source to drive the air cylinder piston to reciprocate in the cavity in the direction of the upper cavity and the direction of the lower cavity. Wherein the control valve is installed on the air cylinder body, or the control valve is arranged close to the air cylinder body and is connected with the air cylinder body through a pipeline. By stripping the valve plate from the valve terminal, moving the valve plate to the position close to the air cylinder body or installing the valve plate on the air cylinder body, the integrated effect that the air cylinder and the control valve are integrally arranged is achieved, and therefore the action time of the air cylinder is shortened, the industrial production rhythm is prevented from being affected, redundant loss generated in the process that an air source is conveyed into the air cylinder body is avoided, and cost is reduced.

The invention discloses semiconductor processing equipment and a processing method, and belongs to the field of semiconductor wafer processing. Semiconductor processing equipment comprises a base table and an electric push rod fixed to the top of the base table, a processing disc is fixedly connected to the top of the base table, a positioning disc is rotationally connected into the processing disc, a driving part for driving the positioning disc to rotate is arranged on the base table, and the semiconductor processing equipment further comprises a mounting frame; in the downward moving process of the dropping pipette, a piston cylinder, an air exhaust plate and a connecting rod are matched to generate a negative pressure suction effect at the adsorption holes, so that a wafer is adsorbed and fixed at the top of the positioning disc, the stability of the wafer in the machining process is ensured, the wafer is prevented from inclining in the machining process, and the machining quality of the wafer is improved. The processing quality is further improved; and in cooperation with rotation of the semiconductor wafer, the photoresist is uniformly spread on the surface of the whole wafer, so that the coating quality is improved, meanwhile, the drying speed of the photoresist can be increased, and the processing efficiency of the semiconductor wafer is improved.

The utility model discloses a movable elbow blank bending die. The movable elbow blank bending die mainly comprises an upper die base, a female die plate, a lower die base, a cushion block, a male die plate and the like. A material pushing assembly and a lubricating assembly are arranged on the male die plate, and an oil pumping assembly in the lubricating assembly is in linkage with the upper die plate to achieve automatic oil pumping. The oil pumping assembly comprises a piston cylinder, a piston rod and the like, and lubricating oil can be accurately conveyed between a blank and a material pushing plate through a main oil channel and an auxiliary oil channel before bending. And the material pushing assembly pushes the formed part out of the convex mold plate through a guide column, a push plate and the like. In addition, the pushing plate is provided with an oil groove and an oil receiving groove, and the oil receiving groove can recycle lubricating oil to an oil tank for recycling. According to the die, through cooperation of all the assemblies, manual participation is reduced, efficient automatic lubricating and discharging are achieved, the production efficiency and the product quality are improved, the cost is reduced, and good practicability and economical efficiency are achieved.

The invention provides an integrated ball valve which comprises a valve body and an actuator, a ball body is arranged in the valve body, the actuator is in driving connection with the ball body through a valve rod, the integrated ball valve is characterized by further comprising an electromagnetic valve, a first piston cylinder and a second piston cylinder, a first piston is arranged in the first piston cylinder, and a second piston is arranged in the second piston cylinder. A first piston is arranged in the first piston cylinder, a second piston is arranged in the second piston cylinder, the first piston and the second piston are in meshed connection with the valve rod, and the electromagnetic valve is used for introducing medium pressure on the high-pressure side of the valve body into the first piston cylinder and / or the second piston cylinder so that the first piston cylinder and / or the second piston cylinder can act. The piston cylinder is arranged on the valve body, medium pressure is introduced, driving force is formed at the two ends of the piston through medium pressure difference, the driving force and the actuator are combined to drive the valve rod to achieve rapid opening and closing of the valve, and the problems that an actuator of an existing high-pressure working condition integrated ball valve is large in size and weight and long in opening and closing time are solved.

The invention relates to the technical field of electromagnetic brakes, in particular to an electromagnetic hydraulic braking structure and electric control electromagnetic hydraulic braking calipers. The electromagnetic hydraulic braking structure comprises a combined piston assembly, the combined piston assembly comprises a piston cylinder, the piston cylinder is provided with a first piston cavity and a second piston cavity which are communicated with each other, the first piston cavity is provided with a combined outer piston and a combined inner piston in a penetrating mode, and the second piston cavity is provided with a pressurizing small plunger in a penetrating mode; an oil storage cavity is formed outside the piston cylinder, and a plurality of oil holes are formed in the side wall of the piston cylinder and are communicated with the first piston cavity and the oil storage cavity; the electromagnet assembly comprises an armature, and the armature abuts against the combined inner piston; and the hydraulic braking assembly is internally provided with an oil way and communicates with the second piston cavity, and multi-stage pressure amplification is achieved through double-cavity linkage. Gap fluctuation between the brake pad and the brake disc in the braking process can be effectively controlled, the characteristic of large suction force of the tail end of the electromagnet is efficiently utilized, and meanwhile the stable braking effect is achieved.

The invention discloses a combined marine heat exchanger, and belongs to the technical field of ship engineering, the combined marine heat exchanger comprises two heat exchanger shells, the number of the heat exchanger shells is two, and two fixing discs are fixedly mounted at the positions, close to the top and the bottom, between the inner walls of the heat exchanger shells correspondingly; a plurality of heat exchange tubes are fixedly mounted on the heat exchanger shell through a fixing disc; according to the heat exchanger, the piston rod slides up and down in the piston cylinder in a reciprocating mode to drive the spoiler at the top end of the piston rod to synchronously reciprocate along the outer wall of the heat exchange tube, the spoiler interacts with a shell pass medium in the moving process, and meanwhile the impeller at the top end is driven to synchronously rotate under the impact of the medium; the piston rod drives the spoiler to reciprocate and rotate and disturb the impeller, so that the flow disturbance intensity of a shell pass medium can be enhanced, the flow stability of the medium is broken, a medium retention area on the outer wall of the heat exchange tube is avoided, the heat transfer efficiency is improved, and the stability of the heat exchange performance of equipment is guaranteed.

The utility model relates to the technical field of filling devices, and particularly provides a plunger type filling valve and a filling device. The plunger type filling valve comprises a piston cylinder, a piston and a rotary valve. The piston cylinder is provided with a first end and a second end deviating from each other; the piston enters and exits the piston cylinder through the first end of the piston cylinder; the rotary valve is arranged at the second end of the piston cylinder and comprises a valve body, a rotary valve element and a first air cylinder. The valve body is provided with a valve element cavity, a first through hole, a second through hole and a third through hole which are all communicated with the valve element cavity are formed in the outer wall of the valve body, and the first through hole is connected with the piston cylinder. The rotary valve element is in a cone shape or a circular truncated cone shape and is rotatably installed in the valve element cavity, and the rotary valve element rotates in the valve element cavity so that the first through hole can be communicated with the second through hole or the third through hole. The first air cylinder is connected with the end, with the large diameter, of the rotary valve element in the axial direction and can drive the rotary valve element to move in the axial direction so that part of the rotary valve element can be separated from the valve element cavity, and the first through hole, the second through hole and the third through hole can be communicated.

The invention belongs to fire fighting, particularly relates to the technical field of fire fighting equipment, and discloses a fire fighting hose reel which comprises a fire fighting reel body, a mounting frame is mounted on the fire fighting reel body, a circulation part is arranged on the mounting frame and comprises a case, the case is mounted on the mounting frame, a first piston cylinder is mounted in the case, and a second piston cylinder is mounted in the first piston cylinder. The middle of the first piston cylinder integrally communicates with a water inlet, one end of the first piston cylinder communicates with a water receiving pipe, a restraining part is arranged on the circulation part, forward water hammer restraining is adopted, the restraining part attenuates the instantaneous speed and pressure of water flow through kinetic energy conversion and gas buffering, the hose is prevented from being straightened and swung due to instantaneous high pressure, and the water flow is prevented from being damaged. By means of reverse water hammer digestion, inert gas backflow of the compensation portion and pressure compensation, reverse impact generated by sudden stopping of water flow is counteracted, fatigue cracking of a hose connector due to repeated impact is avoided, and secondary risks of high-pressure water flow jetting are reduced.

The utility model relates to the technical field of filling devices, and particularly provides a plunger type filling valve and a filling device. The plunger type filling valve comprises a piston cylinder, a piston and a rotary valve. The piston cylinder is provided with a first end and a second end deviating from each other; the piston enters and exits the piston cylinder through the first end of the piston cylinder; the rotary valve is arranged at the second end of the piston cylinder and comprises a valve body, a rotary valve element and an air cylinder. The valve body is provided with a valve element cavity, a first through hole, a second through hole and a third through hole which are communicated with the valve element cavity are formed in the outer wall of the valve body, the first through hole is connected with the piston cylinder, the second through hole is connected with an external material cylinder, and the third through hole is connected with an external outlet; the rotary valve element is rotatably mounted in the valve element cavity, and the first through hole is communicated with the second through hole or the third through hole through rotation; the first air cylinder is connected with the end, with the large diameter, of the rotary valve element in the axial direction and can drive the rotary valve element to move in the axial direction so that the rotary valve element can be partially separated from the valve element cavity, and the first through hole, the second through hole and the third through hole can be communicated. The lifting device is in sliding connection with the piston.

This invention discloses a landing buffer device for unmanned aerial vehicles (UAVs), relating to the field of aviation equipment technology. By integrating the roller body and the sliding plate as two grounding structures onto the landing gear, the device can quickly switch operating modes according to ground conditions through the linkage of the piston cylinder and piston rod. On flat ground, the roller is used first to reduce gliding resistance, while on muddy or slippery ground, the sliding plate is used for grounding, effectively preventing roller jamming and enhancing all-terrain adaptability and landing safety. Simultaneously, the mechanical buffer composed of a second and third spring, combined with the hydraulic damping buffer composed of buffer components, forms a highly efficient double-layer energy-absorbing buffer structure, which to a certain extent alleviates the damage to the aircraft and equipment caused by landing impact, thus improving the landing safety of the UAV.

This invention relates to an anti-clogging device for a conveyor belt discharge chute. The invention includes a main body of the discharge chute, which is funnel-shaped, with a discharge pipe fixed to its bottom end. By providing an air outlet, during the conveyor belt's transport of material into the chute, the material falls onto rotating blades, causing them to rotate clockwise. The rotating blades, via a first connecting rope, pull a piston block downwards, compressing a first spring. The piston cylinder draws air from the air inlet pipe. During the rotation of a first rotating shaft, the shaft drives a rotating plate to rotate exactly 180 degrees, blocking the material and preventing it from falling onto the rotating blades. Under the action of the first spring, the piston block moves upwards, expelling gas from the piston cylinder through the air outlet pipe. This gas is then blown into the chute through the air outlet, creating a weak breeze that blows away any dust particles.

An improved piston valve for brass instruments facilitates adding a length of tube for playing in a lower range, while minimizing the overall air resistance as well as the air resistance differential between disengaged and engaged positions. The piston casing accommodates two input tubes on one side and two output tubes at the same level on the other side. The piston cylinder is comprised of one air passage in one position, and two parallel air passages in a second position. The second position utilizes the attachment of additional tubing for a lower range.

The utility model discloses a sample preparation tool for a lead alloy direct-reading spectrometer sample. The sample preparation tool comprises a to-be-prepared sample, a high-density alloy steel plate and an extrusion device, the high-density alloy steel plate is horizontally fixed below the working platform; a sample to be prepared is positioned under the high-density alloy steel plate; the extrusion device is used for driving the to-be-prepared sample to continuously rise until the to-be-prepared sample is extruded to the high-density alloy steel plate, so that the preparation of the sample is completed; the extrusion device comprises a large piston cylinder, a small piston cylinder and a hydraulic oil tank; the large piston cylinder and the small piston cylinder are vertically placed side by side, and a sample to be prepared is placed at the top end of a large piston of the large piston cylinder; a rodless cavity of the small piston cylinder is connected with a rodless cavity of the large piston cylinder through an oil conveying pipeline, and a second one-way valve is installed on the oil conveying pipeline. An oil outlet pipe of the hydraulic oil tank is communicated with a rodless cavity of the small piston cylinder through a first one-way valve, and an oil return pipe of the hydraulic oil tank is connected with a rodless cavity of the large piston cylinder through an oil drain valve. Small and irregular lead alloy direct-reading spectrometer samples can be conveniently prepared, and the production and research and development efficiency is improved.

The utility model relates to the technical field of paperboard processing equipment, and particularly discloses an anti-tear paperboard laminating machine which comprises an equipment main body for laminating a paperboard, a mounting frame is arranged in the middle of the upper surface of a base in the equipment main body, piston cylinders are mounted at two ends of the top of the inner side surface of the mounting frame, and piston rods matched with each other are arranged in the piston cylinders; compared with a traditional scheme, according to the scheme, through the arrangement of the pressure sensor, the adjusting cylinder and the telescopic piece, the stretching degree during film covering can be accurately and conveniently controlled, the phenomenon that a covering film is torn is effectively avoided, and meanwhile, due to the fact that the installation frame in the scheme can be detached, personnel can conveniently and conveniently maintain all parts.

The invention provides an inspection mandrel for flexible gear ring measurement, which comprises a bottom plate, a bottom plate oil pushing path and a bottom plate oil suction path are respectively arranged in the bottom plate, and a one-way oil pushing valve and a one-way oil suction valve are respectively arranged on the bottom plate oil pushing path and the bottom plate oil suction path; a piston cylinder is further included, the piston cylinder comprises a pushing piston mounting section and an oil way forming section, a pushing piston mounting cavity and an annular oil storage cavity are formed in the pushing piston mounting section, a pushing piston is movably mounted in the pushing piston mounting cavity, and a pushing cavity is formed between the pushing piston and the pushing piston mounting cavity; the oil way opening section is provided with a piston cylinder oil suction way and a piston cylinder oil pushing way, the piston cylinder oil suction way, the annular oil storage cavity and the bottom plate oil suction way are communicated, one end of the piston cylinder oil pushing way is divided into two ways, one way is communicated with the pushing cavity, and the other way of the piston cylinder oil pushing way is provided with a pressure release valve. The other path of the piston cylinder oil pushing path is unidirectionally communicated with the annular oil storage cavity, and the piston cylinder oil pushing path is communicated with the bottom plate oil pushing path. The flexible gear ring part is tensioned through small force, and operation is rapid, easy and convenient.

The utility model discloses an automatic sulfuric acid liquid preparation device for a single-head welding wire copper plating wire, which comprises a mounting plate, a storage tank for storing sulfuric acid is arranged at the upper part of one side of the mounting plate, a bracket is arranged at the lower part of one side of the mounting plate and is positioned below the storage tank, and a piston cylinder is fixedly arranged at the top of the bracket; the bottom of the storage tank is communicated with an inner cavity of the piston barrel through an output assembly, the inner cavity of the piston barrel is connected with a piston disc in a sliding mode, and the outer circle face of the piston disc is sleeved with a sealing ring used for preventing the piston disc from making direct contact with the inner wall of the piston barrel. And meanwhile, the sealing ring prevents the piston disc from directly contacting with the inner wall of the piston cylinder, friction abrasion between the piston disc and the piston cylinder is reduced, abrasion is reduced, sealing performance of the piston cylinder is guaranteed, sulfuric acid leakage is prevented, and quantitative precision of sulfuric acid is guaranteed.

The present application relates to cable sheathing technology field, disclose a kind of based on distribution valve's optical cable sheathing color-changing feed device, including, with the throat of extruder communication main pipeline, further include: two respectively with different color color masterbatch warehouse communication branch pipeline, and two branch branch pipeline with the main pipeline form Y shape convergence section in the way of oblique insertion;Main valve and two branch valves in branch pipeline are located in main pipeline, and two branch valves can switch start-stop closure;Between the round shell connected between main pipeline and extruder, the inner cavity is opened in the round shell, and the inside of the inner cavity is installed with rotatable adjustment cylinder.The fixed dead space between "Y shape convergence section-extruder throat" is replaced by 180 ° rotatable cross valve core in the present application, and horizontal pressure difference airflow is formed by using the same mechanical stroke to drive piston cylinder at switching moment, old material in switching channel is blown out as a whole, and the effect of physical cutting old material section and transition length shortening is achieved.

The invention relates to the technical field of petroleum and natural gas exploration and development, in particular to a pulse rotational flow well cementation oscillator and a using method thereof. The pulse rotational flow well cementation oscillator comprises a shell, the bottom of the shell is rotationally connected with a guide shoe cap, an installation disc is arranged in the shell, the top of the installation disc is provided with a piston cylinder, the upper end of the piston cylinder is open, the piston cylinder and the shell form an annulus, the installation disc is provided with an inclined rotational flow hole communicated with the annulus, and an upper side hole communicated with the annulus is formed in the upper portion of the side wall of the piston cylinder. The bottom of the rotating shaft rotatably penetrates through the piston cylinder and the mounting disc, an upper turntable hydraulically driven to rotate is arranged at the top of the rotating shaft, a first inclined hole communicated with the piston cylinder and a second inclined hole communicated with the annulus are formed in the upper turntable, the rotating shaft is connected with the piston through a cam mechanism, and when the rotating shaft rotates, the piston vertically ascends and descends along the piston cylinder to block or unblock the upper side hole. Through the combination of pulse agitation and rotational flow, the uniform distribution degree of well cementation liquid and the well cementation quality are greatly improved, the eccentric guide shoe cap is rotationally connected with the shell, and the tripping-in efficiency of a well cementation pipe string can be improved.