665 results about "Hydraulic equipment" patented technology

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 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 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 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 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 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 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.

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

A sealing device for hydraulic equipment according to the invention includes an outer member having an annular shape, an inner member inserted into the outer member, and a seal ring housed in an annular groove disposed in the outer circumference of the inner member and abutting on the outer member to prevent a liquid from passing through a gap between the outer member and the inner member. The annular groove of the inner member has a bottom portion including a recess for restraining axial displacement of the seal ring relative to the annular groove.

The embodiment of the invention provides a self-adaptive hydraulic compaction control method, device and system, and the method comprises the steps: collecting pressure data and corresponding time data in a current period when target equipment executes a hydraulic action in the current period; constructing initial pressure curve characteristic data based on the pressure data in the current period and the corresponding time data; comparing the initial pressure curve characteristic data with historical pressure curve characteristic data, and determining working condition data of the target equipment in the current period; and on the basis of the working condition data, regulating and controlling hydraulic parameters of the target equipment in the current period by writing a specification abstract and a background technology. Through the steps of the method, on the premise of not depending on a position sensor, the state change of the hydraulic equipment under different load working conditions can be sensed in real time, intelligent optimization control over hydraulic reversing parameters is achieved, the accuracy of reversing opportunity judgment and the adaptability of the system are improved, the action in-place performance and energy consumption control are effectively balanced, and the working efficiency is improved. And a continuous learning capability is possessed.

The invention relates to the technical field of hydraulic equipment, and discloses a stroke-adjustable driver which comprises a cylinder body and a base, a cavity is formed between the inner wall of the cylinder body and the end face of the base, a first piston and a second piston are sequentially arranged in the cavity from bottom to top in a sliding mode, and a first piston rod is arranged between the first piston and the second piston; the second piston is provided with a second piston rod, one end of the second piston rod extends out of the end face, away from the base, of the cylinder body, a spring is arranged between the second piston rod and the cylinder body, a limiting block is arranged in the cavity, and an adjusting assembly matched with the limiting block is arranged on the outer wall of the cylinder body. The base is provided with a first air port, a second air port and an exhaust port. The position of the limiting block can be adjusted outside the cylinder body through the adjusting assembly, then the stroke of vertical movement of the first piston is adjusted, rapid adjustment of the stroke of the driving device can be achieved without disassembling the cylinder body, the base and the like during adjustment, operation is easy, convenient and rapid, the maintenance cost is low, and the applicability is wide.

The utility model relates to a detachable hydraulic cylinder oil pipe structure, which belongs to the technical field of hydraulic equipment and comprises a hydraulic cylinder, a hydraulic oil pipe, a connecting seat, an input pipe and an oil pipe connector. And a sealing seat is fixedly mounted on the peripheral wall of the hydraulic oil pipe. According to the detachable hydraulic cylinder oil pipe structure, the detachable hydraulic cylinder oil pipe structure is connected with a hydraulic oil pipe under the action of the oil pipe connector and the connector, the sealing performance of connection of the hydraulic oil pipe is improved under the action of the sealing seat, and the hydraulic oil pipe is fixed under the action of the fixed base plate, the movable base plate, the limiting seat, the top plate and the fastening screw; and the hydraulic oil pipe is additionally limited under the action of the connecting block, the movable clamping seat, the fixed clamping seat, the limiting ring and the limiting baffle, so that the fixing stability of the hydraulic oil pipe is improved.

This construction machine is provided with: a flow rate control valve as a hydraulic device that adjusts the flow rate supplied to a hydraulic cylinder that drives a work device; and a control device that controls the hydraulic cylinder so as to satisfy the condition that the work tool moves without exceeding the target surface. The control device calculates a target speed of the hydraulic cylinder at which the work tool satisfies the condition on the basis of information on the target surface and detection information from a detection device that detects the orientation of the work device, and controls the work tool when the target value of the hydraulic device corresponding to the calculated target speed is less than a lower limit value at which the accuracy of flow control can be ensured. On the basis of the limited speed of the hydraulic cylinder obtained from the lower limit value, a target speed of the hydraulic cylinder at which the work tool satisfies the condition is re-calculated, and the hydraulic device is controlled by a target value corresponding to the re-calculated target speed.

This product is a counterweight that is attached to the back of the main body of heavy machinery such as forklifts and hydraulic excavators. This counterweight is configured to accommodate a pressure booster in a recess formed in the upper center of the front, and hydraulic equipment such as an accumulator on the top surface, and is also configured to allow the attachment of a cover to enclose the accumulator on the top surface.

The present application relates to the technical field of hydraulic equipment, and particularly relates to a cooling device of a large-flow hydraulic system, which comprises a tube shell, a plurality of cooling pipes and a plurality of baffles, the tube shell is internally provided with a water inlet cavity, an oil cavity and a water outlet cavity which are sequentially arranged and mutually isolated along the axial direction of the tube shell, the plurality of cooling pipes are arranged in the oil cavity and respectively communicated with the water inlet cavity and the water outlet cavity at two ends; the baffle is rotationally arranged in the oil cavity around the tube shell axis and arranged along the axial direction of the tube shell, the baffle is provided with an opening for hydraulic oil to pass through, and the opening is located on one side of the tube shell axis in the radial direction of the tube shell; the plurality of baffles are divided into two groups, the two groups of baffles are alternately arranged, and the projections of the openings on the two groups of baffles on the axial direction of the tube shell are symmetric about the center of the tube shell. The baffle is rotationally arranged, the flow trajectory of the hydraulic oil in the oil cavity is changed, the impact direction of the hydraulic oil on the cooling pipe is changed, the stable thermal boundary layer between the hydraulic oil and the cooling pipe is not easily formed, and the cooling effect of the hydraulic oil is improved.

The invention belongs to the technical field of hydraulic equipment, and particularly relates to a paste filling formwork hydraulic support and a leakage monitoring method. The problem that leakage detection at the joint of a rubber pipe is difficult is solved, the device comprises a paste filling template hydraulic support and a hydraulic integration module installed on the paste filling template hydraulic support, and the hydraulic integration module comprises an oil way plate, cooling fins installed on the oil way plate and a plurality of water outlet pieces; according to the rubber pipe leakage monitoring device, a worker can carry out positioning maintenance on a rubber pipe which may leak, and the use safety is guaranteed.

The invention relates to a method for controlling overturning stability of a variable-width continuous beam bridge in an asymmetric construction process, which comprises the following steps of: mounting a temporary supporting rod piece on a bearing platform of a main pier of the bridge, and fixedly connecting the lower end of the temporary supporting rod piece with the bearing platform; after the formwork of the main beam section is removed, strain sensors are installed on the surfaces of the fixed supporting rod piece and the adjustable supporting rod piece, and a tilt angle sensor is installed on the fulcrum section of the main beam section; strain and inclination angle data are collected in real time through a monitoring system, and supporting axial force, deformation and unbalanced torque are calculated; and dismantling the temporary support member, the hydraulic equipment and the monitoring sensor after the side span is closed. The method has the beneficial effects that the stress of the temporary supporting structure and the inclination state of the main beam can be monitored in real time, the change condition of the overturning moment is calculated in real time through a corresponding algorithm, and meanwhile the early warning function is achieved.

To provide a hydraulic device capable of sufficiently preventing leakage of pressure oil even when an oil path is a high-pressure circuit, by a check valve mechanism provided on mating surfaces of two components.SOLUTION: In a hydraulic device, a check valve mechanism 100 has a poppet 106 inserted into a poppet hole 156 and a seat part 111 with which an umbrella part 106B can come into contact, and a hole 11A in a main casing 11a and a hole 11B in a head casing 11b are in communication with each other and face each other. The hydraulic device has: a substantially annular O-ring groove 107 provided in the main casing 11a or the head casing 11b radially outward with respect to an opposing part of the hole 11A and the hole 11B with an axial core kA or an axial core kB as reference; an O-ring OR inserted into the O-ring groove 107; and a drain groove 150 provided radially outward with respect to the opposing part and radially inward with respect to the O-ring groove 107, and communicating with a drain port of the main casing 11a or the head casing 11b.SELECTED DRAWING: Figure 5

The utility model relates to the technical field of hydraulic stations, in particular to a hydraulic station with a stable structure, which comprises an oil tank and a support frame, a shell is arranged on the left side of the top end wall of the support frame, an auxiliary oil tank is arranged on the right side of the top end wall of the support frame, and an oil guide pipe is arranged between the auxiliary oil tank and the oil tank for communication; a water removal device is arranged at the bottom in the shell, a vacuum pump is arranged on the left side of the inner bottom wall of the shell, and an air inlet pipe is arranged between the air inlet end of the vacuum pump and the water removal device for communication. The device can work in combination with the change condition of the pressure value of the oil tank, can flexibly meet the requirement for removing water in the oil tank under different working conditions and operation environments, and is suitable for various hydraulic stations used in humid and water-containing environments, such as small industrial hydraulic equipment or large engineering hydraulic systems. The functions of water removal and stable operation can be effectively exerted, and the method has a wide application prospect and good universality.

The invention discloses a water turbine split key disassembling device and method. The water turbine split key disassembling device comprises a disassembling main sleeve and a jacking nut, and the disassembling main sleeve is in threaded connection with the jacking nut; a left clamping block and a right clamping block are arranged on the disassembling main sleeve, two vertical blind holes communicated with the left clamping opening and communicated with the right clamping opening in a staggered mode are formed in the disassembling main sleeve in the axial direction, vertical screw rods are arranged in the vertical blind holes, and limiting holes matched with the vertical screw rods are formed in the left clamping block and the right clamping block. And a screw threaded hole is formed in the bottom section of the vertical blind hole. The left clamping block and the right clamping block are clamped in the annular clamping groove of the split key, the left clamping block and the right clamping block are fixed through the vertical screw on the disassembling main sleeve, so that the disassembling main sleeve and the split key are clamped, the disassembling main sleeve is jacked through the jacking nut by rotating the jacking nut, and the disassembling process is completed. The disassembling main sleeve is matched with the left clamping block and the right clamping block, the split key is jacked and pulled out, hydraulic equipment is not needed, and the disassembling efficiency is high.

This invention relates to the field of hydraulic equipment technology and provides a method, device, and electronic equipment for detecting oil leaks in a hydraulic system. The method includes: a hydraulic system oil leak detection method, wherein the hydraulic system includes an oil tank, multiple first hydraulic cylinders equipped with displacement sensors, and multiple second hydraulic cylinders without displacement sensors; the method includes: obtaining a first oil volume in the oil tank and the multiple first hydraulic cylinders at a first set time; obtaining a second oil volume in the oil tank and the multiple first hydraulic cylinders at a second set time after the first set time; obtaining a third oil volume, wherein the third oil volume is the sum of the maximum changes in hydraulic oil volume in the multiple second hydraulic cylinders; and comparing the difference between the first oil volume and the second oil volume with the third oil volume to determine whether the hydraulic system is leaking. This ensures accurate and timely detection of oil leaks in the hydraulic system and avoids affecting the normal operation of the hydraulic equipment.

The utility model relates to the technical field of metallurgical hydraulic equipment, in particular to a metallurgical hydraulic machine capable of adjusting temperature. Comprising a mounting frame, a vertical guide rod and a motor with an upward output end are arranged on the inner lower side of the mounting frame, a lead screw is connected to the output end of the motor, the upper end of the lead screw and the upper end of the guide rod both penetrate through a sliding table, a heating coil in sliding fit with the guide rod is further arranged on the lead screw in a threaded mode, and liquid storage frames are further symmetrically arranged at the top of the sliding table. The top of each liquid storage frame communicates with a spray head penetrating through the corresponding sliding table. According to the utility model, a lead screw driving mechanism is adopted, so that the heating coil can flexibly adjust the heating position according to the height of a workpiece and specific processing requirements, thereby ensuring that heat is accurately concentrated in a required area and effectively reducing meaningless loss of the heat, thereby achieving an effective stable adjustment effect and greatly improving the heating efficiency; and meanwhile, the spray head can rapidly carry out water-cooling type cooling on the workpiece, and it is ensured that the cooling process is timely and efficient.

The application provides a hydraulic control system, a valve block device thereof, and a hydraulic equipment. The hydraulic valve block device (130) comprises: an input end (b1) which is hydraulically coupled with a first port (a1) of a pilot valve (120) of a hydraulic control system (100) and receives hydraulic fluid from the first port; a control end (b2) which is hydraulically coupled with a second port (a2) of the pilot valve (120) and receives hydraulic fluid from the second port as a control signal; an output end (b11) which is hydraulically coupled with the input end and is used for outputting all or part of the hydraulic fluid received from the input end; and a pressure relief end (T) which is configured to allow a part of the hydraulic fluid received at the input end (b1) to be released from the pressure relief end when the control end (b2) receives hydraulic fluid.

The utility model discloses a hydraulic valve testing device, which relates to the technical field of hydraulic equipment detection and comprises a mounting base, a first supporting seat and a second supporting seat are respectively and fixedly mounted on the mounting base, a second clamping plate is fixedly mounted on the first supporting seat, and the first supporting seat and the second supporting seat are mutually symmetrical. A first polished rod is fixedly installed between the first supporting base and the second supporting base, a first clamping plate is movably installed on the first polished rod, and a connecting claw is fixedly installed on the side face of the first clamping plate. According to the utility model, the opposite surfaces of the first clamping plate and the second clamping plate are provided with a plurality of circular ring grooves with different diameters and the same axis, and a plurality of sealing rubber rings are matched, so that flange valve bodies with various sizes can be easily adapted, the whole set of testing tool does not need to be frequently replaced, and the time and labor cost caused by specification conversion is greatly saved; and meanwhile, the operation error in the tool replacement process is reduced, and the stability of the test precision is ensured.

The invention belongs to the technical field of hydraulic equipment, and particularly discloses a small-table-board ultrahigh-pressure hydraulic extrusion press which comprises a hydraulic system, an electrical system, a supercharger and a hydraulic body. The hydraulic body comprises a rack, a liquid filling device, an upper cross beam, a main cylinder, a return cylinder, an abutting mechanism, a pressing head and a workbench. The pressurizer is used for pressurizing liquid of the hydraulic system and conveying the liquid into the liquid filling device; a big-end-down stepped hole is formed in the rack; a cylinder body of the main cylinder is of a big-end-down protruding structure, a through hole matched with the small end of the cylinder body is formed in the upper cross beam, and the small end of the cylinder body of the main cylinder is embedded into the through hole. The periphery of the upper cross beam is fixed in a small hole of the stepped hole; the cylinder body large end of the main cylinder is matched with the large hole of the stepped hole, and the upper side of the cylinder body large end can abut against the top of the large hole of the stepped hole; the abutting mechanism can jack up the main cylinder upwards. And the return cylinder is mounted on the main cylinder. The pressurizer is adopted to provide ultrahigh pressure, the use pressure is improved, the cylinder diameter of the main cylinder is reduced, and the device is more suitable for large-tonnage small table tops.

The utility model discloses a quick release type pneumatic hydraulic equipment positioner which comprises a positioner body, a mounting inserting plate is arranged on the side surface of the positioner body in an attached mode, a mounting fixing plate is arranged on one side of the mounting inserting plate, a sliding groove is formed in the outer surface of the mounting fixing plate, the sliding groove is designed to be in a step shape, and the mounting inserting plate is arranged in the sliding groove. And an inserting mechanism is arranged between the mounting inserting plate and the mounting fixing plate, and the positioner body can be quickly mounted on the side surface of the mounting fixing plate through the inserting mechanism. According to the quick-release type positioner for the pneumatic hydraulic equipment, when the positioner body breaks down and cannot be used, the positioner body and the mounting insertion plate can be taken down from the mounting fixing plate only by rotating a threaded insertion nail through a tool, and the mounting insertion plate moves in the direction of a sliding block groove; and the mounting inserting plate and the mounting fixing plate cannot move at will when being inserted through the sliding block groove, so that the positioner body can be conveniently and quickly replaced and maintained.