885 results about "Hydraulic equipment" patented technology

The invention discloses a production process and forging equipment for connecting a hollow variable cross-section oil cylinder with a large forge piece, and belongs to the technical field of forge piece forging. Forging equipment for large forgings connected with hollow variable-cross-section oil cylinders comprises a rack and further comprises a pressing head arranged on the upper side of the rack, and hydraulic equipment used for driving the pressing head to ascend and descend is arranged on the rack; the forging table is arranged on the rack and located on the lower side of the pressing head, and a rotating motor used for driving the forging table to rotate is arranged on the rack; the lifting mechanism is arranged on the side edge of the rack and used for driving the forging table to ascend and descend in the vertical direction of the rack. The forging table is automatically adjusted to move downwards and the forge piece is automatically adjusted to move upwards when the forge piece is controlled to be overturned, so that the forge piece overturning step is simplified, the forge piece overturning efficiency is improved, the distance does not need to be adjusted in one direction to leave an overturning space for the forge piece, the size of forging equipment is conveniently reduced, and then the forging cost is reduced.

The invention discloses a multi-cylinder hydraulic equipment data interaction system based on digital twin drive, and relates to the technical field of industrial automation control. The problems that in the prior art, data acquisition and processing lack flexibility and pertinence, model construction and optimization are not perfect enough, and simulation optimization and real-time feedback are lacked are solved. Accurate perception and fault early warning of the equipment state are realized by optimizing the sensor layout and adjusting the acquisition frequency, the physical structure and the working principle of the equipment are accurately described by adopting a digital twin model, and the current and future running states of the equipment are scientifically evaluated and effectively predicted in combination with an evaluation index system of a state analysis unit. A basis is provided for advanced maintenance, the equipment fault risk is reduced, a digital twin model is used for simulating the implementation effect of a control strategy, a control instruction is optimized according to simulation evaluation, the execution effect is monitored in real time for dynamic adjustment, accurate control over equipment is ensured, the stability and reliability of equipment operation are improved, and the production efficiency is improved.

The servo valve comprises an outer shell, a valve assembly is arranged in the outer shell, the valve assembly is connected with a nested antler channel, and the nested antler channel is used for being connected with hydraulic equipment; the valve assembly comprises a rotary valve rod, a valve element and a valve sleeve, the axis of the rotary valve rod is perpendicular to the axis of the valve element, the valve element is coaxially and movably arranged in the valve sleeve, the bottom of the rotary valve rod is connected with a crankshaft, the crankshaft is sleeved with a first bearing, and the valve sleeve is arranged in the nested antler channel. A plurality of through holes used for being communicated with the nested antler channels are formed in the valve sleeve in the axial direction of the valve sleeve, a movable groove matched with the crankshaft is formed in the middle of the valve sleeve in the radial direction, a kidney-shaped mounting hole matched with the first bearing is formed in the valve element, and the length direction of the kidney-shaped mounting hole is perpendicular to the axial direction of the valve element. And at least one annular sleeve is fixedly arranged on the valve element and located on the two sides of the mounting hole in a sleeving mode, the annular sleeves are used for blocking the through holes in different positions, and the valve rod has the advantages that abrasion of the valve rod is reduced, and the service life is prolonged.

The utility model belongs to the technical field of film mulching seeding machines, and particularly relates to a multifunctional film mulching seeding machine which comprises a crawler head, a fixing frame is fixedly arranged on the tail portion of the crawler head, and two supporting wheels are symmetrically arranged on the two sides of the tail portion of the fixing frame. A traction frame which is driven by a hydraulic cylinder to swing up and down at the rear end is hinged to the middle of the fixing frame. The land leveling mechanism, the film breaking mechanism for cutting off the mulching film and lifting the cut-off head of the mulching film and the two soil covering mechanisms for covering soil on the cut-off head of the mulching film are only driven by one hydraulic cylinder instead of additionally arranged hydraulic equipment, so that the purpose of reducing the equipment cost is achieved.

The invention relates to a deep and large foundation pit supporting automatic monitoring early warning and dynamic adjusting system, and relates to the technical field of engineering monitoring, and the system comprises foundation pit supporting structure automatic monitoring devices which are disposed at the positions of all monitoring items of a foundation pit and are used for collecting real-time monitoring data; the monitoring data processing analysis and early warning platform is in communication connection with the monitoring device and is used for analyzing the real-time monitoring data and determining the risk level according to the displacement of the deformation value of the monitoring position exceeding the safety threshold value; the supporting structure automatic adjusting device is in communication connection with the early warning platform and comprises a control center and hydraulic equipment, the control center obtains risk data including the risk level, the risk position importance degree and the structure importance degree based on the deployment position of the monitoring device, and the hydraulic equipment controls and adjusts the length of the telescopic rod at the corresponding risk position in real time according to the risk data. The functions of real-time monitoring, early warning and dynamic adjustment of the supporting structure can be achieved, so that the safety and efficiency of foundation pit supporting construction are improved.

The invention discloses a hydraulic machine intelligent optimization control method based on big data analysis, and relates to the technical field of hydraulic machine intelligent control, and the method comprises the following steps: carrying out the real-time frequency domain analysis of pressure, flow and energy consumption signals during the operation of a hydraulic machine, constructing a load spectrum analysis module, extracting main frequency fluctuation characteristics, and building a corresponding spectrum template; and performing sliding cross matching on the control threshold change curve of the energy-saving mode switching and the frequency spectrum template, identifying a periodic coupling risk section, and labeling and recording the periodic coupling risk section. According to the invention, through frequency domain analysis and a self-adaptive lag mechanism, frequency resonance type oscillation in energy-saving control is effectively suppressed, and the operation stability and the response reliability of the system are improved; meanwhile, a strategy self-learning mechanism based on resonance labels and energy efficiency feedback is introduced, parameters and control strategies are dynamically optimized and judged, the adaptability and long-term robustness of the system to complex working conditions are enhanced, and intelligentization and high efficiency of energy-saving control of the hydraulic equipment are achieved.

The invention provides an oil pump which comprises an oil pump shell and further comprises a shell lower end plate at the bottom of the oil pump shell, a shell upper end plate is arranged at the top of the oil pump shell, two sets of pipeline connectors are connected to the outer side of the oil pump shell in a penetrating mode, two sets of heat dissipation mechanisms are arranged on the outer side of the oil pump shell, and a primary filtering mechanism is arranged on one side of the oil pump shell. According to the device, the hydraulic pressure and the flow of the oil outlet end of the oil pump are detected through the hydraulic sensor and the flow sensor, and the warning lamp is driven and triggered through flowing of oil liquid; a warning signal is transmitted to a remote receiving end through the signal transmission unit of the warning lamp, so that the oil leakage condition of the oil pump can be detected through double modes of the two sensors and the mechanical trigger structure, a detection result can be ensured in cooperation with a filtering structure, and therefore the practicability of the oil pump is greatly improved; and insufficient pressure of hydraulic equipment caused by oil leakage of the oil pump is avoided.

The invention provides a servo multi-section pressure closed-loop control closed-loop system, and belongs to the technical field of servo hydraulic equipment. Comprising a pressure execution module used for recording pressure value change and feedback signals in a pressure applying process in real time, a material change and hydraulic oil interference acquisition module, a servo equipment internal material change data set, a servo equipment external material change data set and a hydraulic oil microenvironment disturbance data set, and a pressure analysis module. The parameter evaluation module is used for establishing and evaluating an internal material change influence coefficient of the servo equipment, an external material change influence coefficient of the servo equipment and a hydraulic oil microenvironment disturbance coefficient, and the intelligent closed-loop control optimization module is used for self-adaptive compensation and stable optimization according to corresponding optimization instructions. Through multi-stage pressure setting and a real-time feedback mechanism and in combination with a high-precision servo driving system, stable and high-response pressure application to a target object in different stages is realized.

The invention discloses a hydraulic equipment anomaly detection method and system based on artificial intelligence learning, and relates to the technical field of industrial automation and intelligent monitoring, and the detection method comprises the specific steps: data collection and preprocessing: collecting data in real time from a pressure sensor, a temperature sensor and a vibration sensor on hydraulic equipment, according to the method, the fuzzy logic and sensor data fusion technology is adopted, complementarity of pressure, temperature and vibration multi-dimensional sensor data in the hydraulic equipment is fully utilized, the fuzzy logic carries out fuzzification processing on the data, uncertainty and fuzziness in the sensor data can be effectively processed, and the accuracy of the sensor data is improved. And meanwhile, the comprehensive perception capability of the system on the equipment state is further enhanced through fusion of multi-sensor data, so that the anomaly detection is more robust, and stable operation can be realized under complex and changeable working conditions.

The present invention belongs to the technical field of hydraulic equipment, and in particular, relates to a stamping die for automobile parts that is convenient for replacing stamping dies, comprising a base, a through opening is provided on the base, a rotating motor is fixedly connected to the outer wall of the base, the driving end of the rotating motor extends through the through opening and is fixedly connected to a rotating block, lower dies of different specifications are evenly distributed on the surface of the rotating block, a stamping table is fixedly provided on the upper side wall of the base, an oil cylinder is fixedly provided on the stamping table, the driving end of the oil cylinder is fixedly connected to a punch plate vertically downward, and a supporting structure for supporting the rotating block is provided in the base. The present invention completes the replacement of the lower die by rotating the rotating block, and the fixing and releasing of the rotating block can be completed by rotating the rotating plate driven by a dual-axis motor. The overall replacement is more convenient than the traditional threaded fixing method, the efficiency of replacing the lower die is improved, and the cleaning work of the replaced lower die can be realized synchronously while replacing.

The present invention relates to the technical field of powder pressing and forming, and in particular to a powder forming hydraulic equipment with an adaptive pressure regulating function, comprising a vertical plate, a horizontal plate, a positioning cylinder, an extrusion plate, a pressing die, a hydraulic pump and an adjusting device; the present invention can solve the following problems existing in the prior art in the process of pressing and forming powder: the pressure applied to the powder cannot be adjusted, which has limitations and affects the pressing and forming effect; the powder cannot be spread flat, so that the powder raw material in the lower die forming device cannot be evenly distributed, and defects are prone to occur during the pressing process; the present invention can adaptively adjust the pressure according to powder raw materials of different materials and different forming requirements, and can be used in powder forming with a variety of different pressures, thereby improving the adaptability of the present invention; the present invention can evenly spread the metal powder by vibration, so that the metal powder is more uniform and compact, thereby ensuring the density and strength of the metal powder after pressing.

The invention discloses a hydraulic system and hydraulic equipment for self-adaptive buffering under impact. Comprising a hydraulic motor used for driving an execution element, a closed type pump set used for driving the hydraulic motor, and a first oil way used for connecting an oil outlet of the closed type pump set with an oil inlet of the hydraulic motor. The second oil way is used for connecting an oil outlet of the hydraulic motor with an oil inlet of the closed type pump set; the self-adaptive cushion valve set is used for weakening pressure impact of the oil way on the high-pressure side and avoiding pressure suction of the oil way on the low-pressure side; oil inlets and oil outlets of the two self-adaptive buffer valve groups are oppositely connected with the first oil way and the second oil way in parallel; the hydraulic closed system is ingenious in structure, the self-adaptive buffer valve group can weaken pressure impact of a high-pressure side oil way, meanwhile, the situation that the pressure of a low-pressure side is rapidly reduced or even air is sucked is avoided, normal work of the hydraulic closed system is guaranteed, and the service life of the hydraulic closed system and all elements can be prolonged.

The utility model relates to the technical field of hydraulic oil cylinder polishing, in particular to a hydraulic oil cylinder polishing machine for hydraulic equipment production. The hydraulic oil cylinder polishing machine comprises a polishing table, a guide rail is fixedly connected to the surface of the polishing table, a sliding block is slidably connected to the surface of the guide rail, and a movable seat is fixedly connected to the surface of the sliding block. A first motor is fixedly connected to the surface of the polishing table, a lead screw is fixedly connected to an output shaft of the first motor, a square nut is in threaded connection to the surface of the lead screw, a second motor is fixedly connected to the surface of the moving seat, and a rotating rod is fixedly connected to an output shaft of the second motor. According to the hydraulic oil cylinder polishing machine, the fixed base, the sealing base and the polishing head can be replaced, the inner surfaces of hydraulic oil cylinders of different specifications can be polished conveniently, time and labor are saved during operation of workers by optimizing the mode of replacing the fixed base, the sealing base and the polishing head, and the use efficiency of the polishing machine is greatly improved.

The invention provides a loading force control method for servo torque feed-forward and linear active disturbance rejection control, and belongs to the technical field of servo hydraulic equipment control. The method comprises the steps that a servo hydraulic tension pad dynamic model is constructed, and the servo torque feed-forward and linear active disturbance rejection control loading force is obtained based on the servo tension pad dynamic model and structural design parameters of a servo tension pad test bed; building a simulation model of the servo stretching pad; a simulation data set and an experiment data set are collected, the simulation data set and the experiment data set are combined, weighted and preprocessed, and a standardized feature matrix is obtained; constructing a servo feed-forward torque prediction model based on XGBoost, taking the standardized feature matrix as model input, and outputting a feed-forward torque; constructing a second-order system model of the servo stretching pad; and combining the feed-forward torque output by the servo feed-forward torque prediction model with the feedback torque calculated by the linear active disturbance rejection control to form a final torque instruction of the servo motor. According to the invention, the control precision and robustness of the loading force in the production process of the servo hydraulic stretching cushion are improved.

The utility model provides a concrete anti-crack pressurizing device, which relates to the technical field of concrete pressurization and comprises a main body and a pressurizing plate, a motor is fixedly connected to the center of the rear side of the bottom of the body and connected with a power source through a circuit. Guide rods are symmetrically and fixedly connected to the left side and the right side of the bottom of the main body, and a bottom supporting plate is further installed on the main body. A pressure plate A is connected with an adjusting plate through a connecting bolt of the adjusting plate, so that hydraulic equipment on a pressurizing plate can pressurize concrete in a space formed by a side plate, a composition plate and a connecting plate, bubbles in the concrete are destroyed, the compactness in the concrete is improved, a linkage block on the pressure plate A can connect the pressure plate A with a pressure plate B, and the pressure plate A and the pressure plate B are connected through the linkage block. The pressurizing range of the device is controlled, and the problems that part of existing concrete manufacturing devices cannot pressurize concrete blocks, and the cracking possibility of the concrete blocks is reduced are solved.

The utility model relates to the technical field of sewage treatment pools, in particular to a sewage treatment pool with a floating object cleaning function, and adopts the technical scheme that the sewage treatment pool comprises a treatment pool body, an adjusting box and a first mounting plate, the two adjusting boxes are symmetrically installed on the upper portion of the side end face of the treatment pond body, threaded rods are rotatably installed in the adjusting boxes, movable blocks are installed on the threaded rods in a threaded mode, the first installing plate is installed at the upper ends of the movable blocks and arranged in an L shape, and hydraulic equipment is installed at the upper end of the first installing plate; and the hydraulic equipment comprises a hydraulic rod, a second mounting plate is mounted at the tail end of the hydraulic rod, rotating shafts are rotationally mounted at the side end of the second mounting plate, a fishing box is mounted between the rotating shafts, and the bottom end of the fishing box is arranged in a mesh mode. The sewage treatment tank has the advantages that floating objects floating on the surface of the sewage treatment tank can be automatically cleaned, and manpower and labor cost are saved.

The application discloses a kind of ship lifting fin plate self-adapting cleaning device, belong to ship equipment technical field, including fixed plate, the fixed plate is connected with fin plate by suspension assembly, the fin plate outside is provided with deep well, the deep well side wall is provided with cleaning assembly, the cleaning assembly includes the slide rail mounting bracket of the deep well side wall, the slide rail mounting bracket is installed with slide rail, the slide rail is installed with push rod, the push rod is connected with sanding wheel, the whole device is provided with control component.The application adopts the above-mentioned ship lifting fin plate self-adapting cleaning device, push rod is adjusted sanding wheel and fin plate adhesion degree by spring and hydraulic equipment, symmetrically arranged sanding wheel is combined with slide rail and can fully cover fin plate surface, improve cleaning efficiency;Real-time monitoring data is obtained by torque sensor and flexible pressure sensing array, and the cleaning strength is intelligently adjusted by using fuzzy PID algorithm, which can ensure the cleaning effect and avoid damaging the anticorrosive coating of fin plate.

The invention relates to the technical field of emergency clinical equipment, and discloses an emergency clinical cardio-cerebral resuscitation rescue device which comprises a supporting height adjusting mechanism and a liquid telescopic driven mechanism. The clinical cardio-cerebral resuscitation rescue device for emergency treatment is used in cooperation with hydraulic equipment capable of controlling liquid flowing pressure and a liquid flowing loop, firstly, the distance between pressing and the heart is adjusted according to the obesity degree of a person, then the elastic extension effect of the elastic air bag is utilized, the elastic adaptation effect can be achieved when the pressing head is pressed, and the pressing effect is improved. Therefore, the pressing effect is transmitted to the patient in a flexible mode, pressing is closer to standardization of cardiac resuscitation, and the success rate of first aid is increased.

The invention discloses a hydraulic pump state monitoring system based on multi-modal information fusion and digital twinning, and particularly relates to the technical field of hydraulic equipment state monitoring. Comprising a hydraulic pump multi-modal data acquisition module, a hydraulic pump multi-modal feature engineering module, a hydraulic pump state hierarchical fusion diagnosis module, a hydraulic pump health state and risk assessment module and a digital twinning and decision support module. The hydraulic pump multi-modal data acquisition module synchronously acquires key operation parameters of a hydraulic pump through a distributed sensor array, and pre-processes the key operation parameters to obtain a hydraulic pump multi-modal parameter set; the hydraulic pump state hierarchical fusion diagnosis module combines the advantages of RF, CNN, LSTM + Attention and other algorithms, a cavitation diagnosis sub-model, a bearing wear diagnosis sub-model and an internal leakage diagnosis sub-model are constructed respectively, diagnosis can be performed for different fault types, and automation and intelligence from feature extraction to fusion diagnosis are realized.

The invention discloses a high-low pressure adjustable constant-temperature hydraulic device, and belongs to the technical field of hydraulic equipment, the high-low pressure adjustable constant-temperature hydraulic device comprises an oil tank main body, a pressure compensation mechanism, a pressure relief mechanism, a vacuum mechanism, a condensation mechanism and a heat dissipation mechanism, the top of the oil tank main body is provided with a hydraulic pump, and one end of the hydraulic pump is connected with a pressure gauge; an oil outlet is formed in the other end of the pressure gauge, the hydraulic pump communicates with the interior of the oil tank body, and an oil return opening is formed in the other end of the top of the oil tank body. The device has the beneficial effects that when the internal pressure of the oil tank is increased, redundant air pressure is exhausted to the pressure bin through the connecting pipe, the first piston moves upwards to store air, shell deformation is avoided, when the pressure is normal, the first piston resets to the middle position by means of spring force, and when the pressure is reduced, the connecting pipe generates suction force, the first piston moves downwards, air compensates the air pressure of the oil tank, and balance is kept; the mechanism effectively isolates internal and external air straight-through, and keeps the internal pressure of the oil tank stable.

The utility model relates to the technical field of hydraulic equipment, and discloses a rack base locking oil cylinder of a bar mill and the bar mill. The oil cylinder comprises a cylinder body, a piston, a piston rod and a locking rod, a containing cavity is formed in the cylinder body, the locking rod, the piston rod and the piston are coaxially arranged and sequentially connected in the extending direction of the axis of the containing cavity, the piston and the piston rod are arranged in the containing cavity, one end of the locking rod extends into the containing cavity to be connected with the piston rod, and the other end of the locking rod is located outside the containing cavity. In the two ends, connected with each other, of the locking rod and the piston rod, one forms a first concave spherical surface, the other forms a first convex spherical surface, the first concave spherical surface is in sliding fit with the first convex spherical surface, and after a gap exists between the locking rod and the guide sleeve or the locking rod is abraded, the locking rod can deflect relative to the piston rod; the locking rod and the piston rod are locked in the direction of the axis of the containing cavity. According to the locking oil cylinder, radial unbalance loading force borne by the piston rod and the piston can be effectively reduced, the sealing performance in the cylinder body is guaranteed, and the service life is prolonged.

The invention discloses a shield mud-water separation comprehensive processing system and method in a complex geological environment, and relates to the technical field of shield construction, and the method comprises the steps: collecting geological parameters and mud parameters of a construction area in real time, and synchronizing the geological parameters and mud parameters to a data processing unit through an Internet of Things transmission protocol; the propelling speed of hydraulic equipment of the shield tunneling machine and operation parameters of mud-water separation equipment are synchronously adjusted, and the mud separation efficiency and the shield tunneling speed are dynamically matched; monitoring performance indexes of the separated mud in real time, feeding back the performance indexes to a geological data fusion algorithm and a reinforcement learning algorithm, and updating a dynamic correction coefficient and a reward function weight; and carrying out filter-pressing dehydration on the solid muck after mud-water separation, detecting the heavy metal content, and uploading the heavy metal content to a block chain distributed account book in real time for evidence storage. On the basis of a feedback closed loop of real-time monitoring data, processing parameters and algorithm weights are continuously adjusted, the adaptive capacity to sudden change working conditions of a complex geological environment is enhanced, and efficient matching of the slurry separation efficiency and the tunneling speed is achieved.

The steering engine (1) includes: a steering engine body (11) of the Rahson sliding type including at least one hydraulic device operating according to an electrical signal; and at least one control device (9) which is installed on the steering engine main body (11) and controls the at least one hydraulic device. For example, the steering engine main body (11) comprises: a tiller (2) fixed to a rudder shaft (15); plungers (3A, 3B) that engage with the tiller (2); cylinders (4A-4D) into which both ends of the plungers (3A, 3B) are inserted, respectively; and a plurality of hydraulic units (5) that constitute a hydraulic circuit together with the cylinders (4A-4D), and a control device (9) is attached to each of the cylinders (4A-4D).

The utility model relates to the technical field of municipal environmental protection engineering, and discloses municipal environmental protection engineering garbage treatment equipment which comprises a garbage treatment box, the lower portion of the garbage treatment box is fixedly connected with a first base, an extrusion rod is connected into the garbage treatment box in a sleeved mode, and a hydraulic rod is installed on one side of the extrusion rod. And hydraulic equipment is mounted outside the hydraulic rod. According to the garbage treatment equipment for municipal environmental protection engineering, a connecting sleeve synchronously moves along with movement of an extrusion rod, the inner side of the connecting sleeve makes contact with a telescopic sleeve, the telescopic sleeve drives a push rod to apply pressure to a positioning pin, and meanwhile after the positioning pin deviates from the lower end of a second base, the lower end of the second base is reduced in limitation; and after the lower end of the second base uses supporting force, one end of the second base slides downwards, that is, extruded solid garbage can be taken out through an opening in one end of the garbage treatment box, and the garbage cleaning efficiency is improved.

The invention discloses an aluminum extruder, including an extrusion frame, an extrusion hydraulic device, an extrusion die fixing seat, an extrusion cylinder seat, an extrusion die seat, an extrusion front die, an extrusion rear die, a belt conveyor, an extrusion die replacement mechanism and an extrusion die cleaning mechanism; the extrusion die replacement mechanism includes a lifting platform lifted on the extrusion frame, a rotating bracket rotated on the lifting platform, a hydraulic telescopic cylinder 1 and a rotating device driving the lifting platform to lift and the rotating bracket to rotate; the extrusion die cleaning mechanism includes a cleaning table fixed on the extrusion frame, a hydraulic telescopic cylinder 2 fixed on the cleaning table, a die removal device connected to the piston rod of the hydraulic telescopic cylinder 2, an extrusion die fixing frame and a lifting frame sliding and lifting on the cleaning table, a clamping fixing device arranged on the extrusion die fixing frame, a lifting device and a moving device driving the lifting frame to lift and move the extrusion die fixing frame, and two ejection plates and an aluminum waste ejection rod of the fixed lifting frame. Advantages of the invention: Automatically remove residual aluminum waste from the extrusion die.

The invention relates to the field of stainless steel flange machining. The invention discloses a stainless steel flange continuous forming device and a using method thereof, and aims to solve the problems that burrs and sharp edges are generated when holes are formed in an existing flange through hydraulic equipment in the forming machining process, and then the sealing effect of the flange is reduced during subsequent gasket installation. Therefore, after the flange is perforated, a polishing device is needed to polish the perforated position of the flange, and the operation process of flange machining and forming is affected. Burrs and sharp edges generated by tapping can be removed through polishing, the surface of the tapping position of the flange is smooth, safety and assembly quality are improved, the flange is sealed through the sealing gasket, the smooth tapping surface can be better attached to the gasket, and therefore the sealing performance is improved, and medium leakage is prevented.

The invention discloses a water seal pressure test system and method for oil field well control equipment, belongs to the technical field of pressure test systems, and provides the following scheme that the water seal pressure test system comprises water seal pressure test equipment, and a detection mechanism is arranged on one side of the water seal pressure test equipment; according to the invention, water seal pressure test equipment is ventilated to enter a hose, so that gas is shunted to enter a piston cylinder, a piston rod and a rotating roller are controlled by air pressure to displace, the rotating roller displaces to drive an annular plate and a gear ring to rotate through an obliquely arranged guide port, and after the gear ring and a gear are in transmission, a limiting piece can rotate; the angle of the annular plate is kept fixed until the rotating roller enters a short guide opening, the position of the sealing assembly can be locked through clamping between a limiting piece and a limiting part, and therefore in the upward resetting process of misoperation of the hydraulic equipment, an adjusting plate presses a second switch to give an alarm through an alarm, and the situation that the equipment is prone to being damaged due to disassembly in the under-pressure state is prevented; and meanwhile, the safety risk is increased.

The present invention discloses a hot extrusion forming device and method for large cylindrical forgings, belonging to the technical field of forging forming. A hot extrusion forming device for large cylindrical forgings includes a frame, and also includes: a die seat part, the die seat part includes a lower die seat and an upper die seat, the lower die seat is fixedly arranged on the frame through a support rod, a hydraulic device for driving the lifting of the upper die seat is arranged on the frame, and the upper die seat is placed on the upper side of the lower die seat and is movably abutted against the lower die seat; a conveying part, the conveying part includes a first conveyor and a second conveyor, a support seat is arranged between the first conveyor and the lower die seat, and the second conveyor is arranged on the side of the lower die seat away from the first conveyor; The present invention facilitates the automatic feeding of forging blanks and the automatic discharging of the cylindrical forgings after extrusion forming, has a high degree of automation, improves the forging extrusion forming efficiency, and does not need to use an ejection mechanism to eject the forging blank upward, which facilitates the rapid demolding of the forging blank and ensures the extrusion forming quality of the forging blank.

To inhibit temperature rise of a hydraulic fluid effectively to prevent seizure of a hydraulic pump.SOLUTION: A hydraulic device 4 includes: a hydraulic cylinder 10; and a hydraulic pressure supply / discharge device 5 which expands or contracts the hydraulic cylinder 10. The hydraulic pressure supply / discharge device has: a bypass oil passage B which is branched from a first oil passage 41 extending from the discharge side of a hydraulic pump 15 to a spool of a switching valve 16 and disposed so that its downstream end returns a hydraulic fluid to an oil tank 17; a bypass valve 19 which may open or close the bypass oil passage; and linkage means which links the spool and the bypass valve to each other. At least a part of the bypass oil passage B is formed in a bypass pipe 18 provided outside of casings 24, 31. The linkage means links the spool and the bypass valve to each other so that the hydraulic fluid discharged from the hydraulic pump flows through the bypass pipe when a switching position of the spool is in a neutral position and the hydraulic fluid discharged from the hydraulic pump does not flow through the bypass pipe when the switching position of the spool is in a lifted position.SELECTED DRAWING: Figure 5

The invention is a flow-through flow-through filter that can separate raw water and / or sewage to filtered stream, fine particle stream and grit stream in one hydraulic device. For raw lake and / or canal water intake application, the flow-through filter is placed inside a chamber box that is mounted on a water intake rack structure or diversion canal. The invention filters debris and organisms to prevent biomes formation in pumps and waterlines that delivers raw water to a water treatment plant. The flow-through filter withdraws flows from a raw water body without taking defined sediment, floating debris and target aquatic biomes and eliminates the need of discharging remnants to a sewage system.For wastewater treatment, the flow-through filter is installed over a wet well after the headwork rack and may replace the grit removal, primary clarifier, and the fine screening. The flow-through filter requires a much smaller footprint of the area and / or enclosed building that requires smaller odor control. There is a substantial cost saving of using one device and replaces grit removal, primary basin, and fine screening.