1704 results about "Hydraulic ram" patented technology

The invention discloses a hydraulic rammer tamping construction parameter adjusting method based on sensing parameter real-time feedback, and relates to the technical field of hydraulic rammer tamping construction.The hydraulic rammer tamping construction parameter adjusting method comprises the steps that a multi-mode sensing monitoring network is constructed to collect full-amount construction data, a wavelet packet decomposition algorithm is adopted for noise layered suppression, and a multi-mode sensing monitoring network is established; constructing a working condition associated data set in combination with the construction stage labels; based on the working condition associated data set, establishing a dynamic tamping effect evaluation model, and outputting a deviation index moment of time-space distribution; training a parameter adjustment intelligent model based on the deviation index matrix and a transfer learning mechanism, generating a multi-parameter collaborative adjustment strategy, and carrying out working condition adaptation degree scoring and adjustment risk early warning on strategy output; and adjusting the intelligent model based on incremental learning and model distillation technology optimization parameters. According to the method, the multi-modal sensing network, the geological dynamic quantitative model, the improved entropy weight method, the migration and reinforcement learning and the lightweight deployment technology are fused, so that full-chain intelligent dynamic optimization and safe controllable execution of hydraulic rammer construction parameters are realized.

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

The invention discloses a pipe jacking construction device and method based on an artificial freezing technology, and belongs to the technical field of pipe jacking construction, the pipe jacking construction device comprises a base, a side plate vertically fixed at the rear end of the base, hydraulic oil cylinders symmetrically mounted at the two ends of the inner side of the side plate, and a jacking table fixed between the output ends of the hydraulic oil cylinders. The strip-shaped grooves are evenly formed in the outer side edge of the top table in an annular array mode, the sliding bases are slidably arranged in the strip-shaped grooves, the hydraulic chucks are rotatably installed on the sliding bases, the hydraulic chucks can be used for fixing the drill rod during use, the drill rod is driven to rotate through the drilling motor, and therefore in the using process of the device, the drilling efficiency of the drill rod is improved. A drill rod can be inserted into soil, a hole for installing a freezing pipe is formed in the outer side of a pipe jacking channel so that the freezing pipe can be conveniently inserted and installed, the functionality of the device is improved, in addition, when the device is used, the interval adjusting mechanism is matched, the hole opening position during freezing pipe installation can be adjusted according to the outer diameter of the pipe jacking, and practicability is higher.

The invention discloses a paper-plastic mold positioning auxiliary system capable of monitoring hydraulic pressure in real time through an AI. The paper-plastic mold positioning auxiliary system comprises an AI control center, a hydraulic monitoring unit, an air pressure monitoring unit, a positioning auxiliary execution unit, an abnormity protection unit and a data acquisition and transmission module. The hydraulic monitoring unit is used for collecting hydraulic oil cylinder pressure, temperature, hydraulic oil viscosity and equipment operation duration data; the air pressure monitoring unit collects air pressure, flow and valve delay time data of a pipeline valve; the data acquisition and transmission module transmits data to the AI control center, and the AI control center analyzes abnormity through a model and calculates a correction amount; the positioning auxiliary execution unit coordinates the positioning of the servo motor and the hydraulic oil cylinder; and the abnormal protection unit receives the early warning and starts a protection action. The system solves the problems of hydraulic monitoring lag and the like, realizes hydraulic and air pressure cooperative monitoring and positioning compensation, ensures production coherence and equipment safety, and is adaptive to automatic production of paper-plastic molds.

The invention belongs to the technical field of engineering hydraulic oil cylinders, and particularly relates to a hydraulic oil cylinder with a filtering mechanism for reducing pollutant accumulation. An air inlet pipe is directly connected with an external cold air source, cold air can be directly diffused in a device box and wraps a hydraulic oil cylinder body, and meanwhile a motor drives fan blades to rotate through a third rotating shaft; according to the oil cylinder cooling device, flowing of cold air in the device box body can be accelerated, the heat dissipation effect of the oil cylinder can be enhanced, heat accumulation caused by local retention of the cold air can be avoided, meanwhile, suspended dust generated by cleaning of the cleaning brush, small impurities which are not settled in the cold air and falling objects in the using process of the cleaning brush can be sucked, and the cleaning effect is improved. And the cleaning rod rotates under the rotation of the third rotating shaft, so that the impurities blocked by the second filter screen are cleaned, and the impurities enter a first collecting box through a connecting pipe.

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

The invention discloses an electromagnetic and hydraulic combined bulging and correcting method for a pipe plate. The method comprises the steps of 1, feeding treatment, 2, electromagnetic pre-activation treatment, 3, hydraulic precise bulging treatment, 4, pressure maintaining and shaping treatment, 5, electromagnetic and hydraulic collaborative correcting treatment and 6, material taking and post-treatment. The device comprises a machine frame which is vertically symmetrical and provided with a forming lower die and an opening and closing upper die through a hydraulic oil cylinder, a temperature sensor and a strain gauge are embedded in the lower side in a die cavity, high-frequency induction coils are arranged on the outer surfaces of the forming lower die and the opening and closing upper die, and a pulsed magnetic field generator is embedded in the top in the opening and closing upper die. A liquid injection opening is formed in the side edge of the upper opening and closing mold and is connected with a high-pressure oil pump through a pipeline; a main controller is further arranged on the rack; through a staged coupling process, the deformation resistance during bulging is reduced, elastic recovery is eliminated through cooperative shape correction, meanwhile, the device integrates multiple modules, real-time matching of electromagnetic parameters and hydraulic pressure is achieved, and the device adapts to forming of pipe plates made of different materials and in complex shapes.

The invention discloses a pure electric servo bending machine electric cylinder, which relates to the technical field of bending machine driving parts, and comprises an electric cylinder body, a transmission assembly, an execution assembly, a lubricating assembly and an anti-rotation assembly, the transmission assembly is matched with a ball screw through a synchronous pulley, a conical screw nut sleeve and a ball screw nut to realize motion transmission; the execution assembly drives an electric cylinder piston to stretch; the lubricating assembly realizes self-circulation lubrication of lubricating oil; the anti-rotation assembly limits radial rotation of the piston through a piston anti-rotation cambered surface. Pure electric servo transmission is adopted, positioning is accurate, response is rapid, an external oil way is not needed, safety risks such as oil leakage are avoided, and maintenance is convenient and fast; stable operation of equipment is guaranteed through self-circulation lubrication, movement stability is improved through an anti-rotation structure, and a conical matching structure is convenient to disassemble and assemble and high in universality. The hydraulic oil cylinder effectively overcomes the defects of an existing hydraulic oil cylinder, is suitable for various high-precision bending machines, and has high practical value.

Wind energy assemblies and deployment methods are provided that include a telescoping mast, an energy conversion system, and a carriage assembly. The telescoping mast has a top and a bottom, a mast roller system, and a plurality of mast sections. At least one of the mast sections is an internal mast section, and at least one of the mast sections is an external mast section. The energy conversion system is mounted to the top of the telescoping mast and includes a steering system, a wind instrument mast, a drive assembly, a rotor hub, a disc brake, and a plurality of blades extending from the rotor hub. The carriage assembly supports the telescoping mast. The mast roller system enables the at least one internal mast section to be pulled out from the at least one external mast section, thereby facilitating extension of the telescoping mast. A hydraulic ram assembly may be provided to rotate the telescoping mast to a vertical position.

The application belongs to the technical field of hydraulic devices, and particularly relates to a deep diving oil pump oil cylinder integrated hydraulic machine and an application method thereof. The hydraulic machine comprises a hydraulic oil cylinder, an integrated power unit and a connecting structure. The integrated power unit comprises a pressure-bearing container, a motor pump group, a control valve group and an electric control system. The pressure-bearing container comprises a first chamber and a second chamber separated by a first partition structure. The containing space of the hydraulic oil forms a first communication channel and a second communication channel with the rodless chamber and the rod chamber of the hydraulic oil cylinder respectively. The electric control system controls the flow path and flow area of the hydraulic oil through the control valve group, and provides power for the flow of the hydraulic oil in the communication channel through the motor pump group. The connecting structure connects the hydraulic oil cylinder and the integrated power unit on the corresponding side of the rodless chamber and the rod chamber of the hydraulic oil cylinder respectively. Through the optimization of the spatial distribution and the flow path of the hydraulic oil by the highly integrated structure, the energy efficiency, the maintenance convenience and the reliability of the layered water intake gate of the system are improved.

The embodiment of the invention provides a steel plate laser cutting device, and relates to the technical field of metal material laser machining, the steel plate laser cutting device comprises a workbench, a portal frame is mounted on the workbench in the width direction, a laser cutting device is mounted on the portal frame, and the workbench comprises a mounting frame; a plurality of first supporting pieces parallel to one another are fixed to the mounting box in the width direction, second supporting pieces corresponding to the first supporting pieces are arranged in the mounting box, the second supporting pieces are arranged on the workbench in a sliding mode and slide in the length direction of the workbench, and a supporting plate moving in the vertical direction is arranged in the mounting box in a sliding mode; a plurality of sets of supports are fixed to the supporting plate, feeding rollers rotate on the same set of supports, the feeding rollers are parallel to one another and located between the adjacent first supporting pieces, and hydraulic oil cylinders for controlling the supporting plate to move up and down and feeding devices for adjusting sliding of the second supporting pieces are arranged on the supports. The device has the effect of facilitating steel plate collection and waste residue cleaning.

The utility model relates to the technical field of flange nut machining, in particular to a machining device for hexagonal flange nut assembly production, which comprises a base, a U-shaped frame fixedly mounted at the upper end of the base, cross-shaped grooves formed in the side walls of the two sides of the U-shaped frame, and a hydraulic oil cylinder fixedly mounted at the upper end of the U-shaped frame. An electric telescopic rod is installed at the output end of the hydraulic oil cylinder, a fixing seat is fixedly installed at the lower end of the electric telescopic rod, sliding grooves are symmetrically formed in the fixing seat, side rods are fixedly installed on the side walls of the two sides of the fixing seat, a placing frame is fixedly installed at the upper end of the base, and a circular groove and an inner groove are formed in the upper end of the placing frame; the sliding frames are evenly and slidably installed in the inner wall of the inner groove at equal intervals, the wedge-shaped blocks are fixedly installed at the opposite ends of the sliding frames, the second springs are fixedly installed on the sliding frames, and through the mode that the wedge-shaped blocks are fixed towards the middle, the hexagonal flange nut can be always kept in the center position when placed and is not prone to deviation; and the tapping accuracy and effect are enhanced.

The utility model relates to the technical field of superplastic forming equipment, in particular to a hydraulic system of pulse type superplastic forming equipment, which comprises a prepressing module, a forming module and a master control module, the pre-pressing module comprises a heating device and a plurality of hydraulic oil cylinders; the heating device is divided into an upper part and a lower part, the upper part and the lower part of the heating device are respectively connected with an upper die and a lower die of a superplastic forming die, and the fixed end of the hydraulic oil cylinder is arranged on the lower part of the heating device; the telescopic end of the hydraulic oil cylinder is connected with the upper part of the heating device; the hydraulic oil cylinder serves as an execution unit of the pre-pressing module; and pressure is applied to the raw materials in the mold, and pre-pressure is provided for the heating stage of superplastic forming. According to the hydraulic system provided by the utility model, accurate and stable pressure control of the whole process from pre-pressing to forming to pressure maintaining is realized, so that stable pressure of parts in the whole process from heating to forming to pressure maintaining is ensured, the size and shape precision is improved, and higher yield of superplastic formed parts is ensured.

The utility model discloses a locking hydraulic oil cylinder with controllable extrusion depth, which relates to the technical field of hydraulic oil cylinders and comprises an oil cylinder, an adjusting bin, an adjusting block and a threaded rod, an oil outlet is arranged on one side of the top of the oil cylinder and communicated with the inside of the oil cylinder, and an oil inlet is arranged on one side of the bottom of the oil cylinder and communicated with the inside of the oil cylinder. The oil inlet is communicated with the interior of the oil cylinder, a piston is arranged in the oil cylinder, the second gear is driven to rotate by rotating the rotary knob, and then the two first gears meshed with the second gear are driven to rotate synchronously. When the first gear rotates, the two threaded rods connected with the first gear are driven to rotate, and the rotation of the threaded rods further drives the adjusting block to move in the axial direction; in the sliding process of the piston, the rod body drives the limiting block to move synchronously, and the adjusting block can limit the stroke of the limiting block; when the limiting block is in contact with the adjusting block, the piston stops moving, so that accurate limiting of the stroke of the piston is realized, and the extrusion depth of the other end of the rod body is accurately controlled.

The utility model relates to the hydraulic oil cylinder sealing performance detection technical field, and discloses a servo hydraulic oil cylinder sealing performance detection tool comprising a support seat, one side of the support seat is provided with a detection head, the interior of the detection head is fixedly connected with a connecting pipe, the top of the support seat is slidingly connected with a work bench, and the work bench is provided with a clamping groove. A fixing assembly is arranged at the top of the workbench and used for limiting and fixing the servo hydraulic oil cylinder, the fixing assembly comprises a connecting base, a connecting assembly is arranged on the outer wall of the connecting pipe, and the connecting assembly is used for rapidly connecting the connecting pipe with an oil nozzle. According to the utility model, the output end of the air cylinder drives the I-shaped frame to slide on the outer wall of the connecting shaft, and the connecting rod is further driven to shift inwards in the ascending process, so that the effect of quickly clamping and fixing the oil cylinder is realized, and the problem that the detection accuracy is influenced by cumbersome operation and unstable fixation of a fixing assembly in the prior art is solved; and the overall working efficiency of equipment sealing performance detection is improved.

The utility model relates to the technical field of dies, and discloses a ceramic arc-shaped plate pressing die which comprises a lower die and an upper die, the upper die is arranged above the lower die, a hydraulic rod is arranged between the upper die and the lower die, the hydraulic rod is fixed in the inner wall of the lower die, a baffle is installed on the lower die, and a side plate is installed on one side of the lower die. The ceramic arc-shaped plate pressing mold is composed of the lower mold body and the upper mold body, the upper mold body is connected with the lower mold body through the hydraulic rod, in the opening and closing process of the upper mold body and the lower mold body, the baffle blocks the formed arc-shaped ceramic plate, adhesion between the arc-shaped ceramic plate and the upper mold body is avoided, and meanwhile the upper mold body is arranged on the first connecting piece. And under the connection cooperation of the second connecting piece, the connecting rod, the first positioning shaft and the second positioning shaft, the push rod can be shifted, so that the push strip pushes the arc-shaped ceramic plate on the lower die, and finally, blanking is completed.

The utility model discloses a movable assembly type formwork for box culvert construction, which belongs to the technical field of box culvert formworks, and comprises an inner formwork and an outer formwork, the inner formwork comprises a bottom longitudinal beam, the bottom longitudinal beam is fixedly connected with a plurality of first support rods respectively, the first support rods are sleeved with first connecting pipes in a sliding manner, and the first connecting pipes are sleeved with second connecting pipes respectively; the end, away from the first supporting rod, of the first connecting pipe is slidably sleeved with a second supporting rod, transverse rods are fixedly connected to the second supporting rod, a second connecting pipe is arranged between the two transverse rods, hydraulic oil cylinders are fixedly installed on the first supporting rod, the second supporting rod and the transverse rods respectively, and inner formworks are detachably installed on piston rods of the hydraulic oil cylinders. The outer formwork comprises a support, an outer formwork is installed on the support, and idler wheels are installed at the bottom of the bottom longitudinal beam and the bottom of the support respectively. The utility model solves the problems that in the manufacturing process of the box culvert in the prior art, due to different sizes of the box culvert, the construction of a formwork is easily limited, the formwork is difficult to mount, dismount and circulate, the construction period is seriously restricted, and the construction cost is increased.

The automatic maintenance equipment for the mining hydraulic support stand column comprises a driving module and a dismounting module, the dismounting module is connected to the top of the hydraulic support stand column in a sleeving mode and corresponds to an inner guide sleeve, and the driving module is located below the dismounting module and connected to the lower middle portion of the hydraulic support stand column in a sleeving mode; the dismounting module comprises a fluted disc, an outer guide sleeve, an inner clamping block, an adjusting rod, a ratchet wheel, a driving motor and a gear; the driving module comprises a hoop, a supporting plate, a vertical rod, a hydraulic oil cylinder and a pawl; when the driving motor drives the gear and the fluted disc to rotate, the arc-shaped guide groove in the fluted disc guides to enable the adjusting rod to drive the clamping blocks to move in the radial direction so as to clamp the inner guide sleeve. The hoop is fastened on a hydraulic support stand column, the hydraulic oil cylinder on the supporting plate drives the pawl to be matched with the ratchet wheel through the stand rod and drives the ratchet wheel to rotate so that the outer guide sleeve can rotate, and therefore the inner guide sleeve clamped in the outer guide sleeve can be disassembled. The inner guide sleeves on the hydraulic support stand columns of different sizes can be automatically disassembled, adaptability is high, and operation efficiency is high.

The utility model relates to the field of electrical automation design, and discloses an intelligent card self-adaptive pressing device which comprises a base, the left side and the right side of the top of the base are fixedly connected with second connecting columns, the adjacent sides of the tops of the two second connecting columns are fixedly connected with fixing plates, and the tops of the fixing plates are fixedly connected with hydraulic oil cylinders. The output end of the hydraulic oil cylinder penetrates through the top of the fixing plate and is fixedly connected with a hydraulic plate, connecting rods are rotationally connected to the front side and the rear side of the outer wall of the fixing plate correspondingly, the other ends of the connecting rods are rotationally connected with the front side and the rear side of the top of the hydraulic plate correspondingly, and pressing blocks are fixedly connected to the front side and the rear side of the bottom of the hydraulic plate correspondingly. According to the utility model, the pressure can be adjusted through the first connecting column, the second spring and the push plate, the smart card is ensured to be uniformly stressed, the pressing quality and precision are improved, the defective rate is reduced, and the whole-course accurate monitoring of the pressure sheet in the connecting cylinder at the top of the placing plate is realized.

The utility model discloses a novel walking type turner, which relates to the technical field of turners and comprises a truss, four corners of the truss are fixedly connected with supporting legs, the bottom ends of the supporting legs are movably connected with sliding rail type walking wheels, the bottom of the truss is slidably connected with an electric hoist frame, four corners of the electric hoist frame are provided with hydraulic oil cylinders, and the hydraulic oil cylinders are provided with hydraulic oil cylinders. A driving motor frame is arranged at the bottom ends of the four hydraulic oil cylinders, a cross-shaped commutator is fixedly connected to the bottom end of the driving motor frame, driving shafts are arranged at the left end and the right end of the cross-shaped commutator, turning wheels are arranged at the ends, away from the cross-shaped commutator, of the driving shafts, and the track of each turning wheel is a rounded square. Aiming at the problems of incomplete turning and throwing and incapability of turning and throwing at the corner of the ectopic fermentation bed, the turning and throwing wheel is formed after optimization by virtue of the characteristic that the motion trail of the Leyo triangle is a rounded square, so that turning and throwing at the corner are realized, and the problem of incomplete turning and throwing is solved.

The utility model relates to the technical field of formwork climbing devices, and discloses a building construction formwork climbing device which comprises a wall body, a connecting assembly comprises a first sleeve, the first sleeve is arranged on the outer surface of a formwork, a piston rod of a hydraulic oil cylinder is located in the first sleeve, and mounting holes are formed in the piston rod of the hydraulic oil cylinder and the outer surface of the first sleeve. Limiting rods are cooperatively mounted in the mounting holes, connecting shafts are rotationally connected to the outer surfaces of the formworks, gears are mounted on the outer surfaces of the connecting shafts, racks are mounted at one ends of the limiting rods, and the racks are in engaged connection with the gears. The external force can be effectively resisted through the rigid connection of the connecting assembly and the meshing design of the transmission part, and the stability between the piston rod of the hydraulic oil cylinder and the template is ensured.

The invention provides a small-sized convenient lubricating oil filling machine, and relates to the field of lubricating oil filling. The device mainly comprises a box body, a driving mechanism and an auxiliary mechanism, the driving mechanism is installed below the box body, the auxiliary mechanism is installed on the side face of the box body, and the box body is provided with a remote control module which can remotely control the driving mechanism and the auxiliary mechanism; a first filter and a second filter are arranged in the oil conveying loop, the cleanliness of the lubricating oil is guaranteed through two filtering measures, and a controller in the box body accurately controls the filling amount of the lubricating oil by collecting signals of a flow meter; a hydraulic rod of a hydraulic oil cylinder in the driving mechanism stretches out and draws back to adjust the terrain clearance, an electric cylinder drives a right supporting leg to rotate, the right supporting leg drives a left supporting leg through a steering connecting rod, and steering of the driving mechanism is achieved. A lead screw in the auxiliary mechanism rotates to enable a sliding base to move, the sliding base opens an auxiliary oil injection assembly through a supporting connecting rod, an adjusting motor drives a gear, the gear is matched with a rack, and adjustment of the auxiliary oil injection assembly is achieved.

The invention relates to an electric control hydraulic oil cylinder and an electric forklift with the same. A valve plate is arranged at the lower end of an oil cylinder body, a ball valve assembly is arranged in the middle of the valve plate, pushing assemblies are arranged on the two sides of the valve plate respectively, and the ball valve assembly is used for controlling the pushing assemblies to work; a gravity sensor is arranged on a pallet fork, a first-stage push plate is arranged on the pallet fork in a sliding mode, a second-stage push plate is arranged on the first-stage push plate in a sliding mode, one end of the first-stage push plate is connected with a pushing assembly, a supporting assembly is arranged at the lower end of the second-stage push plate, and the supporting assembly is used for supporting the outer side face of a forklift body when the forklift turns. When goods are lifted through the pallet fork, signals on the two sides of the pallet fork are transmitted to the operation end through the gravity sensor, then the goods are placed in the middle by moving the first-stage sliding plate left and right, meanwhile, when the electric forklift turns, the side with large stress is supported through the supporting assembly, and the situation that the electric forklift topples over due to uneven load is avoided.

This invention provides a hydraulic control system for a concrete placing boom, comprising a hydraulic oil tank, an oil supply pump unit, a main hydraulic pressure pipeline, a main return hydraulic pipeline, and at least one hydraulic actuator unit. The oil supply pump unit is located on the main hydraulic pressure pipeline. Each hydraulic actuator unit includes a hydraulic cylinder and a control valve assembly. The control valve assembly is located close to the hydraulic cylinder, or integrated onto the hydraulic cylinder. The control valve assembly includes a main directional valve, a standby directional valve, and a balance valve assembly. The inlet ports of the main directional valve and the standby directional valve are respectively connected to the main hydraulic pressure pipeline. The return ports of the main directional valve and the standby directional valve are respectively connected to the main return hydraulic pipeline. The outlet ports of the main directional valve and the standby directional valve are respectively connected to the hydraulic cylinder via the balance valve assembly. This invention also provides a control method for the hydraulic control system of the concrete placing boom and a concrete placing boom device.

The present application relates to building machine technical field, specifically be a kind of column type building machine jacking system, including several column section main body, lengthening section main body and control hydraulic cylinder and the oil cylinder control system for controlling its accurate lifting, column section main body between all be provided with lengthening section main body, the outside of column section main body is provided with jacking mechanism;The lower climbing frame and upper climbing frame with column section main body and lengthening section main body between are provided with reinforcing mechanism for supporting stress, the upper climbing frame and steel platform main body between are provided with anti-misplacement connecting mechanism for interconnection.This system not only can realize the independent lifting of lower climbing frame or upper climbing frame, realize building machine whole climbing or descending, also can ensure the stability in lifting process, reduce use risk and increase stress safety redundancy by the accuracy of simple system control hydraulic cylinder stroke.

The application discloses a kind of rail vehicle weighing test bench online calibration device and method, it is related to weighing test bench calibration technical field, including connecting frame, the first pull rod is connected in connecting frame one side, and one second pull rod is connected in connecting frame both ends;The first pull rod bottom end is connected with pre-positioning mechanism, and the second pull rod is installed adjusting mechanism in one end connected with connecting frame;The adjusting mechanism is used to make the other end of second pull rod cooperate with weighing test bench, to cooperate with pre-positioning mechanism and straighten connecting frame;Force value sensor and hydraulic cylinder are sequentially installed in the bottom of connecting frame, and the hydraulic cylinder is used to abut on the upper side of weighing test bench, and can extrude force value sensor upwards.The application can improve the calibration accuracy and efficiency of weighing test bench.

A kind of hydraulic cylinder stroke test machine of easy installation, the present application relates to stroke detection technical field;Plug rod is fixed on the side wall adjacent to the bottom plate of movable plate, plug rod is movably inserted in the bottom plate;Scale is fixed below the front side of the side wall adjacent to the bottom plate of movable plate, scale is movably inserted in the bar slot on the front side wall of bottom plate;Two ends of connecting spring are fixedly connected with the inner wall of bottom plate and the inner wall of plug rod;Moving mechanism is arranged on the upper side of bottom plate, moving mechanism is connected with fixed frame;Clamping mechanism is arranged on the side wall of fixed frame, clamping mechanism is suspended on the upper side of moving mechanism;Mounting plate is arranged on the upper side of bottom plate, mounting plate is connected with moving mechanism;Oil pipe is inserted on mounting plate, one end of oil pipe is connected with the connecting head of required detection hydraulic cylinder;Mounting seat is arranged on fixed frame and movable plate;Positioning mechanism is arranged in mounting seat;It can be convenient to install various oil cylinders, and installation is flexible, so that oil cylinder detection is simple, cost is reduced.

The utility model discloses rolling and leveling equipment for welding seams of annular steel belts, and relates to the technical field of annular steel belt machining, the rolling and leveling equipment comprises an I-shaped base and further comprises a rolling wheel for rolling the welding seams, a sliding groove is formed in the top end of the I-shaped base, a sliding strip is arranged in the sliding groove, a placing plate is installed at the top end of the sliding strip, and the placing plate is arranged on the I-shaped base. And movable supporting plates moving along with the placing plate are installed on the two sides of the placing plate, a fixing plate is installed at the rear end of the top of the I-shaped base, a first hydraulic oil cylinder is installed at the rear end of the fixing plate, and a first oil pressure telescopic rod is installed at the front end of the first hydraulic oil cylinder. The first oil pressure telescopic rod pushes the L-shaped movable plate, so that the L-shaped movable plate drives the second hydraulic oil cylinder, the second oil pressure telescopic rod and the rolling wheel to move, the welding seam is rolled through the rolling wheel, and according to the structure, under the action of the second hydraulic oil cylinder, the second oil pressure telescopic rod and the rolling wheel, the welding seam is conveniently rolled.

The utility model relates to the technical field of coal mine roadways, in particular to a roadway reinforcing device for coal mine roadway tunneling, and solves the problems that the roadway reinforcing mode in the prior art is too single and lacks an adjusting function, so that the inner walls of roadways with different heights are inconvenient to reinforce at any time, and the roadway reinforcing convenience is greatly reduced. The roadway reinforcing device for coal mine roadway tunneling comprises a base, a bearing frame is fixedly connected to one side of the top of the base, hydraulic oil cylinders are fixedly connected to the two sides of the bottom of the inner side of the bearing frame through bolts, and a bearing plate is slidably connected to one side of the inner side of the bearing frame; and output shafts of the two hydraulic oil cylinders are fixedly connected with the bottom of the bearing plate. The roadway reinforcing device not only has height adjusting flexibility and reinforcing accuracy, but also has strong supporting force and stability, effectively solves the problems existing in a traditional roadway reinforcing mode, and greatly improves roadway reinforcing convenience and efficiency.

The utility model relates to the technical field of shearing machines or shearing devices for cutting by using a rotary cutting disc, and discloses an intelligent cutting device for construction, which comprises a base, supporting legs are fixedly connected to the lower side of the base, a protective shell is fixedly connected to the upper side of the base, and a hydraulic oil cylinder assembly is fixedly connected to the upper side of the protective shell. The output end of the hydraulic oil cylinder assembly is fixedly connected with a hydraulic telescopic rod, the lower end of the hydraulic telescopic rod penetrates into the protection shell in a sliding mode, the lower end of the hydraulic telescopic rod is fixedly connected with a cutting block, the output end of the left side of the cutting block is fixedly connected with a cutting blade, and a protection collecting mechanism is arranged on the protection shell. The cutting device has the advantages that sparks and scraps generated by cutting can be limited, meanwhile, the scraps can be collected, so that the safety is improved when the cutting device is used, meanwhile, the scraps do not need to be swept effortlessly, and the workload of workers is reduced.