761 results about "Piston cylinder" patented technology

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 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 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 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.

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 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.

The utility model relates to the technical field of pipeline valves, in particular to a device for controlling slow closing of a check valve, the check valve and a brake, a shell of the brake can axially rotate on a base of the brake, and the brake drives a brake assembly through an internal brake piston to generate friction braking with the shell of the brake; a piston rod of the double-acting piston cylinder is fixedly connected with a shell of the brake through the overturning assembly. The brake fluid storage tank is in one-way communication with a fluid inlet cavity of the double-acting piston cylinder and the brake piston through a first pipeline, the brake fluid storage tank is in two-way communication with the fluid inlet cavity of the double-acting piston cylinder and the brake piston through a second pipeline, and a control valve is arranged on the second pipeline. The brake fluid storage tank is bidirectionally communicated with the fluid return cavity through a third pipeline; friction braking is generated through the braking assembly and the brake shell, the slow closing effect of the valve clack is achieved, the slow closing effect is stable, the water hammer effect is remarkably eliminated, and when a water pump is started, the valve clack of the check valve can be easily and normally opened.

The application discloses a device and method for simulating the quick strain failure behavior of a nuclear fuel cladding, which comprises a support structure composed of a rack moving base and a hoisting device, a load loading system composed of a fixing frame, a powerful electromagnet, a limiting device, a counterweight and a guide column, and a test and measurement system composed of a punch, a plunger, a guide sleeve, a piston cylinder, a cylinder body, a hydraulic oil chamber, a pressure sensor, a driving pipe mounting flange, a locking nut, a driving pipe, a cladding pipe and a data acquisition device; the application provides a test method matched with the device; the application can realize the simulation of the quick strain failure behavior of the nuclear fuel cladding under the plane strain stress condition in the millisecond scale, can accurately record the internal pressure and strain response relationship of the cladding under the quick strain condition, and thus realizes the evaluation of the quick strain failure performance of the cladding.

The invention discloses an air tightness testing device for bathroom accessory pipe detection, and particularly relates to the technical field of bathroom accessory detection.The air tightness testing device comprises a limiting base, a limiting pipe is inserted into the upper portion of the limiting base in a penetrating mode, the limiting base is further provided with an inflation assembly used for pressurizing a bathroom accessory pipe, and one side face of the limiting base is provided with a test observation assembly; the test observation assembly comprises a piston cylinder inserted into one side face of the limiting seat, and one end of the piston cylinder is communicated with the interior of the limiting pipe. According to the air tightness testing device for bathroom accessory pipe detection, the air inflation assembly is inflated to drive the air pressure jacking mechanism, the air tightness state of the accessory pipe is visually fed back in combination with the brightness change of the LED lamp, when the accessory pipe leaks air, the air pressure is reduced, so that the piston is reset, and the LED lamp is darkened until the LED lamp is extinguished; a user can quickly judge whether the air tightness is good or not through the light change, and the detection convenience and the result readability are improved.

The invention discloses a drain pipe connecting device for construction of a sewage treatment plant, and relates to the technical field of sewage treatment equipment. Comprising a connecting pipe, annular grooves are formed in the two sides of an inner cavity of the connecting pipe, a plurality of pre-buried grooves are formed in the side, close to the annular grooves, of the interior of the connecting pipe, sealing assemblies are arranged in the pre-buried grooves, through grooves are formed in the side, close to the annular grooves, of the inner wall of the connecting pipe, and moving assemblies are arranged in the through grooves; a first toothed plate moves in a pre-embedded groove through an arranged moving assembly, a second toothed plate with a piston rod slides towards the deep position of an inner cavity of a piston barrel under the action of a gear shaft, and gas generated in the inner cavity of the piston barrel in the sliding process enters an annular air bag through a communicating pipe; therefore, the annular air bag expands to be tightly attached to the surface of the drainage pipe, and the connection sealing performance of the connecting pipe and the drainage pipe is improved.

This utility model proposes an electronic detonator bundling system, including a base, a telescopic column fixedly installed at the top of the base, the telescopic column being inclined, a fixing cylinder fixedly installed on the side wall of the telescopic column, a foot switch electrically connected to one side of the base, a plug-in cylinder sleeved on the fixing cylinder, and multiple first piston cylinders evenly fixedly connected to the inner wall of one side of the plug-in cylinder. After the operator steps on the foot switch, the device stably expands, pushes, and then resets the rubber sleeve, thus smoothly completing the bundling work. The operation is simple and convenient, and the operator does not need to operate with one hand, realizing semi-automation of the bundling work, which improves work efficiency to a certain extent. Moreover, the finished product can be grasped with both hands throughout the process, which can effectively prevent the finished product from loosening again. The rubber sleeve is in place in one step without secondary adjustment, and the finished product is neat and tidy after bundling.

The application discloses a piston type quantitative grassland fertilizing device and relates to the field of fertilizing devices. The piston type quantitative grassland fertilizing device comprises a fertilizing tank, a stirring assembly installed in the fertilizing tank and used for stirring fertilizer solution in the fertilizing tank, a detection assembly installed on the stirring assembly and used for detecting the dissolution degree of solid fertilizer in the fertilizer solution, and a piston cylinder installed in the fertilizing tank, wherein a liquid inlet pipe and a liquid outlet pipe are connected to the piston cylinder, one-way valves are installed in the liquid inlet pipe and the liquid outlet pipe, and the liquid outlet pipe penetrates through the fertilizing tank. Through the arrangement of the stirring assembly, solid waste can be effectively stirred, and the situation that solid fertilizer is not completely dissolved due to deposition is reduced. Meanwhile, through the arrangement of the detection assembly, whether the fertilizer solution still contains solid fertilizer can be detected, the subsequent use of the grassland fertilizing device is facilitated, and the situation that the concentration of the fertilizer solution is insufficient is avoided.

This application pertains to the field of industrial vehicles and discloses a steering hydraulic system and a forklift. The steering hydraulic system includes a steering gear with first and second oil outlets; a steering cylinder with a first connecting oil passage between its first end and the first oil outlet, and a second connecting oil passage between its second end and the second oil outlet; and a booster cylinder, including a first booster cylinder disposed in the first connecting oil passage and a second booster cylinder disposed in the second connecting oil passage. Both the first and second booster cylinders include a small piston cylinder and a large piston cylinder located at both ends. The large piston cylinder is hydraulically connected to the oil outlet of the steering gear, and the small piston cylinder is hydraulically connected to the cylinder chamber of the steering cylinder; and a replenishing valve, which is a replenishing and balancing oil passage disposed between the small piston cylinders of the first and second booster cylinders. By adding a booster cylinder, this application achieves a boosted drive effect, making steering lighter and more flexible. Furthermore, by setting up a replenishing valve, it can be used to achieve oil balance between the two cylinders in a timely manner.

The application discloses a single-channel pipette and a use method thereof, and particularly relates to the technical field of single-channel pipettes, which comprises an upper gun body and a lower gun body arranged at the bottom of the upper gun body, a protection connecting assembly is arranged between the upper gun body and the lower gun body, the protection connecting assembly comprises a center cylinder arranged in the upper gun body, and a piston cylinder is arranged at the bottom of the center cylinder and located outside the center cylinder. Through the corresponding cooperation of various structures, when the second limiting tooth and the first limiting tooth slide, a meshing sound with equal tooth spacing is emitted, which prompts the operator that the upper gun body and the lower gun body will reach a screwed state, the limiting buckle is clamped in the buckle cavity and emits an in-place sound, which prompts the operator that the screwing has reached the in-place state, the center cylinder cannot be continuously screwed, the operator is prevented from over-tightening the wire sleeve and causing the wire sleeve to burst, the hidden danger that the lower gun body falls off due to the bursting of the wire sleeve is prevented, and dangerous accidents caused by liquid leakage are avoided.

The application relates to the technical field of swing plate shearing machines, and discloses a blade gap adjusting mechanism of a hydraulic swing plate shearing machine, which comprises an adjusting seat, an adjusting mechanism arranged on the adjusting seat, a sliding seat arranged in the adjusting seat, a shearing mechanism arranged on the sliding seat, an oil storage tank, a piston cylinder and a function box fixedly installed at the top of the adjusting seat, wherein the piston cylinder is located at the right side of the oil storage tank, and the function box is located at the right side of the piston cylinder; a piston mechanism is arranged in the piston cylinder, and a push plate is slidably installed in the function box. The application has the following advantages and effects: the piston mechanism and the lubricating mechanism are arranged, the lubricating oil can be uniformly sprayed on key transmission parts such as the screw thread surface and the bevel gear meshing position through the oil injection head, a continuous oil film can be formed, the friction coefficient is reduced, the wear of parts is reduced, the smooth transmission is ensured, the hysteresis and unevenness of manual lubrication are avoided, and the like.

The invention provides a hydraulic punching machine protection device, which belongs to the technical field of hydraulic punching machine protection, and comprises a rack, a lower template arranged at the lower end of the inner side of the rack, an air cylinder arranged at the upper end of the inner side of the rack, a pressing plate arranged at the output end of the air cylinder, a piston barrel arranged in a slide way, and two sides of the pressing plate slidably sleeve the outer side of the piston barrel. A piston rod is arranged in the piston cylinder, the top of the piston rod penetrates out of the rack and is fixedly connected with a cross rod, a main electromagnetic valve is arranged on the right side of the connecting port, a passage B is arranged on the right side of the standby electromagnetic valve, and a pressure sensor is further arranged on the passage F. The problems that according to an existing hydraulic punching machine protection device, air circulation is blocked through the closed state of a single electromagnetic valve, then downward movement of an air cylinder is limited, if the electromagnetic valve is clamped in the open state, even if the air cylinder moves downwards due to gravity, air in a piston barrel can still circulate through the electromagnetic valve, a protection mechanism directly fails, and operators still face safety risks are solved. And certain potential safety hazards still exist.

The invention relates to the technical field of industrial bulk material conveying energy conservation, in particular to a coal blanking energy recovery system which comprises a blanking point receiving device, a compressed air unit, a multi-stage air pressure boosting and stabilizing module, an air generator and electric energy storage equipment which are sequentially arranged in the energy transfer direction. The compressed air unit is arranged at the downstream of the blanking point receiving device and comprises a piston cylinder body and a piston rod which reciprocates in the piston cylinder body; the multi-stage air pressure boosting and stabilizing module is connected in series on an airflow channel between the compressed air unit and the air generator; the inlet of the air generator receives stable high-pressure airflow, and the electric energy output end is connected with the electric energy storage device through a cable. Through high-efficiency conversion of mechanical-air pressure-electric energy and multi-stage cooperative regulation and control, high-efficiency and reliable recovery of transient and fluctuating impact energy is realized.

The application provides a fixing tool for automobile part welding, which comprises a base platform and a center support part, and further comprises a plurality of radial adjusting parts uniformly distributed along the circumference of the center support part, each of which is provided with an edge support and pressing part and an edge horizontal limiting part. The edge horizontal limiting part comprises a sealed cavity, a plurality of piston cylinders and a piston contact assembly. The sealed cavity is connected with a pressure medium to provide back pressure. Each piston cylinder is independently connected with a second pipeline and a second control valve to realize independent adjustment and accurate control of the limiting force. The end of the contact rod is provided with a detachable hemispherical elastic contact head and is equipped with a pressure sensor. The application solves the technical problems of poor adaptability of the existing tool to the edge positioning of special-shaped and curved automobile parts and uncontrollable limiting force by using the multi-point independently driven piston type self-adaptive limiting structure, realizes the joint adjustment of the circumferential angle and the radial position, independent and accurate control of the limiting force and hierarchical flexible buffering, and effectively improves the welding quality and the application range of the tool.

This application relates to the field of water conservancy engineering and discloses a lifting gate for water conservancy projects, including a base, a frame, a gate body, and a drive mechanism. It also includes a connecting pipe, one end of which passes through the middle of the gate body, and the other end is fixedly connected to a sleeve. A piston cylinder is sealed inside the sleeve. A telescopic rod is mounted on the top of the gate body via a mounting bracket. A connecting plate is fixedly mounted on the telescopic end of the telescopic rod. The top of the balance pipe is fixedly connected to the connecting plate. This device uses a baffle plate to block water entering the semi-circular area, thereby reducing the difference in water level on both sides of the gate body. This design can reduce or offset the water pressure on both sides of the gate body, significantly reducing sliding wear and frictional resistance between the gate body and the chute during relative movement. It also reduces the power consumption of the drive mechanism, making it highly practical.

The utility model belongs to the technical field of machining, and provides a clamping turnover mechanism which comprises a motor, a clamping assembly and an air blowing assembly. When the driving assembly drives the two sets of clamping rods to fold and move to clamp the box body insert, the piston head slides in the piston cylinder, so that air in the piston cylinder can be blown out of the two sets of air outlet nozzles through the air outlet one-way valve, the three-way connector and the air guide hose to clean cuttings on the opposite faces of the two sets of clamping rods, and the cuttings on the two sets of clamping rods are convenient to clean; and displacement and damage to the outer surface of the box body insert after clamping of the box body insert are avoided, and the practicability of the device is improved.

The utility model provides an automatic feeding device of a bar digging machine, which comprises a hanger plate and a bar digging machine body arranged below the hanger plate, and further comprises a flexible feeding component arranged between the hanger plate and the bar digging machine body, the flexible feeding assembly comprises a mounting plate mounted above the bar digging machine body, a set of sliding columns arranged above the mounting plate, piston cylinders slidably connected to the outer portions of the sliding columns, and a pushing structure arranged below the hanging plate and used for enabling the sliding columns to push the bar digging machine body to conduct flexible feeding. The guide assemblies are arranged on the left side and the right side of the bar digging machine body. By arranging the flexible feeding assembly, the bar digging machine body can be pushed to feed through the pressure of gas, when the bar digging machine body makes contact with a sapphire material, due to the fact that the gas has compressibility, flexible buffering can be formed in the piston barrel, the bar digging machine body is not subjected to rigid impact during feeding, and it is avoided that impact force is generated to damage the sapphire material; the appearance quality of the sapphire product is further improved.