3136 results about "Mechanism (engineering)" patented technology

The invention relates to the technical field of pressure steel pipe stiffening ring welding, in particular to a hydraulic engineering pressure steel pipe stiffening ring welding machine which comprises two fixed bottom plates arranged in parallel and a sliding bottom plate installed between the two fixed bottom plates in a sliding mode. The upper portion of the right side of the sliding bottom plate is connected with a first adjusting seat through a hydraulic cylinder, and two clamping assemblies used for clamping the inner walls of the two ends of the pressure steel pipe are installed on the outer side of the supporting column at equal intervals. A first clamping mechanism used for clamping the outer side of one end of the pressure steel pipe is fixed to the outer side of the right end of the supporting column, and the supporting column is arranged over the sliding bottom plate. Supporting roller assemblies used for lifting and limiting the lower portion of the pressure steel pipe are symmetrically installed above the sliding bottom plate. According to the hydraulic engineering pressure steel pipe stiffening ring welding machine, a pressure steel pipe can be horizontally moved to adjust the welding position only by pushing the sliding bottom plate, the pressure steel pipe does not need to be separated from the supporting roller assemblies, operation is convenient, and time and labor are saved.

The invention provides a multi-dimensional supporting leg structure for lightweight steel ring splicing equipment, and relates to the field of tunnel engineering. The mounting base is fixedly connected with the frame, the telescopic driving mechanism is arranged between the mounting base and the supporting leg assembly, the angle adjusting mechanism is arranged between the cylinder barrel and the mounting base, and the self-locking mechanism is used for locking the cylinder barrel and the piston rod when the driving unit fails. The telescopic driving mechanism is composed of a cylinder barrel, a piston rod and a driving unit, the angle adjusting mechanism is driven through a first rotating shaft and a second rotating shaft which are perpendicular to each other and corresponding rotation, so that the cylinder barrel achieves double-shaft swing adjustment, the self-locking mechanism is composed of a locking rack, a movable tooth claw, a reset spring, an electromagnet and a permanent magnet, and power-on unlocking and power-off self-locking are achieved. According to the structure, the supporting polygon is obviously enlarged under the complex basic condition, the anti-overturning stability of equipment is improved, reliable supporting is kept when a hydraulic system fails, and the safety and adaptability of steel ring splicing operation in a tunnel are improved.

The invention discloses a collaborative enhancement energy consumption mechanism and a support arm type fan tower drum damping device with the collaborative enhancement energy consumption mechanism, and relates to the technical field of engineering structure vibration, the collaborative enhancement energy consumption mechanism comprises a liquid column lever assembly and a plurality of inerter damping units symmetrically installed at the end of the liquid column lever assembly, and each inerter damping unit comprises a shell; the hydraulic damper and the linear-rotation converter are sequentially and axially installed in the shell from top to bottom, when the liquid column inclines, the first connecting plate is driven to drive the piston rod to stretch out and draw back, the piston rod drives the flywheel to rotate through the linear-rotation converter, and therefore vibration energy is transmitted to a fixed foundation structure through the second connecting plate to be dissipated; the invention further discloses a supporting arm type fan tower drum vibration reduction device, displacement of the vibration transmission part is transmitted to the liquid column lever through the connecting piece, the inerter damping unit is driven to stretch out and draw back, a complete energy consumption chain of the tower drum, the vibration transmission part, the connecting piece, the liquid column, the inerter damping unit and the ground is formed, and it is guaranteed that energy is stably transmitted to a fixed foundation structure.

The invention relates to the technical field of pipeline cutting, and particularly discloses cutting equipment for gas engineering pipeline installation, which comprises an equipment base, servo motors are symmetrically and fixedly connected to the outer side of the equipment base, a driving assembly is arranged at the top of the equipment base, and a clamping assembly and a supporting assembly are symmetrically arranged in the equipment base. A laser cutting head is arranged between the two clamping assemblies, the driving assembly comprises a first driving mechanism and a second driving mechanism, and each clamping assembly comprises a limiting mechanism, a positioning mechanism, a first clamping mechanism, a second clamping mechanism and a transmission mechanism. Through separation operation of the first clamping mechanism and the second clamping mechanism, the pipeline can be placed on the top of the bottom positioning mechanism, then the first clamping mechanism and the second clamping mechanism are combined, a second double-shaft motor is started to drive a first half gear ring and a second half gear ring which are in butt joint, the first half gear ring and the second half gear ring push a driven wheel to rotate, and then the pipeline is clamped. And the driven wheel drives the clamping block to position and clamp the steel pipe, so that the steel pipe is conveniently and quickly positioned, the cutting stability of the steel pipe is ensured, and the cutting quality is improved.

The invention relates to a hydraulic system of a steering mechanism, the steering mechanism and engineering machinery, the hydraulic system of the steering mechanism is used for controlling forward running steering and reverse running steering of a vehicle, and the hydraulic system of the steering mechanism comprises a hydraulic pump (1); the unloading valve group (2) is arranged on an oil supply path of the hydraulic pump (1), and the unloading valve group (2) is configured to release the pressure of the hydraulic oil; the proportional control valve group (3) is arranged on a working oil way of the unloading valve group (2), and the proportional control valve group (3) is configured to control the steering direction and the steering angle of the first steering axle (10) and the steering angle of the second steering axle (20); the flow amplification valve group (4) is arranged between the proportional control valve group (3) and the steering oil cylinder (5), the flow amplification valve group (4) and the steering oil cylinder (5) are both located on a working oil way of the proportional control valve group (3), and the flow amplification valve group (4) is configured to amplify the flow of hydraulic oil entering the steering oil cylinder (5).

The invention provides an auxiliary device for steel pipe construction welding, and relates to the technical field of pipeline welding, and the auxiliary device comprises two arc-shaped bearing bodies, an auxiliary main frame, an aligning mechanism and a rotary driving system. The central angle of the arc-shaped bearing body is larger than 180 degrees, automatic centering of the steel pipes is achieved through the outer pressing supporting rod assembly and the inner positioning supporting rod assembly, and it is guaranteed that the two sections of steel pipes are concentric. And the welding head mounting seat is connected with the rotary driving piece through the arc-shaped movable clamping body to drive the welding head to continuously rotate around a welding seam, so that high-quality girth welding is completed. The device solves the problems of low centering precision and poor efficiency in traditional welding, has the advantages of high automation degree, high stability, convenience in assembly and disassembly and the like, and is suitable for quick welding of municipal steel pipe engineering.

The invention relates to the technical field of constructional engineering, and discloses bar planting integrated equipment and an operation method thereof.The bar planting integrated equipment comprises a bearing mechanism which comprises a machine shell, a storage groove formed in the outer side of the machine shell, telescopic supporting legs rotationally installed in an inner cavity of the storage groove and universal wheels fixedly installed at the bottom of the machine shell; the driving mechanism comprises a three-section type hydraulic telescopic column located in the center of an inner cavity of the machine shell, a ball bearing seat fixedly installed at the end of the three-section type hydraulic telescopic column and a jacking buffering assembly fixedly installed at the top of the ball bearing seat. And the integrated mechanism is used for integrated punching operation and comprises an operation support fixedly installed on the outer surface of the innermost section of the three-section type hydraulic telescopic column. An integrated platform is provided for the punching assembly, the hole cleaning assembly, the glue injection assembly and the steel bar planting assembly through the integrated mechanism, the assemblies can be reasonably distributed around operation points, operation of all steps is rapidly achieved, and therefore the operation efficiency is effectively improved.

The invention discloses a multi-axis high-low-cycle composite heat engine fatigue test device and a test method, and relates to the technical field of fatigue test.A clamping swing mechanism and a high-cycle loading mechanism in the device are located on two planes perpendicular to each other, a low-cycle load acts on a test piece through a fatigue testing machine, and a high-cycle load acts on the test piece; the high-cycle load acts on the clamping swing mechanism through the high-cycle loading mechanism, so that high-cycle loading and low-cycle loading of different paths are achieved, and multi-axis loading of the vibration load is achieved due to the asymmetry of the clamping swing mechanism. According to the fatigue test device and test method for the multi-axis high-low-cycle composite heat engine, the real load environment of a blade material is considered, engineering practice is fitted, and a basis is provided for life evaluation.

The invention relates to the technical field of tensile tests, and discloses a building sealant stretching performance test device, which comprises a test box, a first clamp, a loading block, a linear driver and a driving mechanism, a door plate is mounted on the front of the test box; the first clamp is installed at the top in the test box, the loading block is arranged in the test box, located below the first clamp and driven by the linear driver to move up and down, a through loading channel is formed in the loading block, and a cylinder is arranged in the loading channel and driven by the driving mechanism to rotate; a through assembly channel is formed in the cylinder body, and a transversely-arranged guide rail body is installed in the assembly channel. According to the invention, by carrying out stretching, torsion, inclined stretching, tearing stretching, winding stretching and testing in a low-pressure environment on the sealant, the mechanical properties of the sealant under complex working conditions can be comprehensively evaluated, the testing precision and reliability are improved, the actual engineering requirements are met, and meanwhile, the testing safety and environmental protection property are ensured.

The invention provides an EMB sensorless clamping force estimation method based on multi-signal fusion and displacement compensation, and belongs to the technical field of vehicle braking, and the method comprises the steps: carrying out the modeling of an EMB system mechanical model; on the basis of the EMB system mechanical model established in the step S110, executing clamping force estimation; on the basis of the EMB system mechanical model established in the step S110, current-position information fusion is adopted to execute contact point detection; on the basis of the contact point detection result in the step S130, performing contact point detection position error compensation; on the basis of S140 position error compensation, a return stroke backlash compensation mechanism is introduced, the mechanical transmission gap error is further corrected, and the clamping force estimation precision is improved; and executing clamping force control scheme design based on the results of the steps. According to the method, a good clamping force estimation effect can be achieved, the system reliability is remarkably improved while the cost is reduced, and the method has good engineering application value.

The invention relates to the technical field of engineering construction, and particularly discloses a pavement flatness measuring device for engineering construction, which comprises an eight-wheel instrument for measuring the flatness of a pavement; the detection mechanism is installed in the eight-wheel instrument support, and the detection mechanism detects the friction coefficient of the road surface before the device runs; the road surface friction coefficient is detected in advance through the adjusting mechanism, the adjusting mechanism dynamically adjusts the position of a pressure sensor and the ground clearance of a detection wheel according to the friction coefficient, and a fixed motor is started to drive a rotating ring to rotate through a rotating roller and a synchronous belt to drive a second lead screw to rotate; the movement of the second moving member can drive the eight-wheel instrument supporting seat to move up and down, thereby adjusting the ground clearance of the detection wheel, effectively compensating the data deviation caused by the wear of the detection wheel, and improving the accuracy and stability of the measurement result.

The invention relates to the technical field of mechanical engineering, and discloses a walking type building wall surface size detection device, which comprises a fixed frame, a plurality of driving parts which are adaptively mounted at the bottoms of the two sides of the fixed frame respectively, driving shafts which are fixedly mounted at the output ends of the driving parts through couplings, and walking wheels which are fixedly arranged on the outer surfaces of the driving shafts in a sleeving manner. Through cooperation of all parts in the walking mechanism, in the moving process of the walking wheels, a stable negative pressure area can be formed in the negative pressure air suction pipe, tiny defects on the surface of a wall and the overall flatness can be accurately detected through the detection assembly, and the detection accuracy is improved. The suction cup can be adsorbed to the wall surface through the adsorption assembly when the negative pressure air suction pipe is separated from the wall surface, the suction cup is moved to the position where the suction cup is separated from the wall surface when the negative pressure air suction pipe is in contact with the wall surface, and dust and impurities on the surface of the filter screen can be automatically removed through the cleaning assembly when airflow enters the negative pressure air suction pipe.

The invention discloses a hot continuous rolling unit thickness detection and optimization method based on double closed-loop feedback control. In order to improve the problems of thickness control precision, response speed, a multi-rolling-mill cooperative operation mechanism and the like of an existing hot continuous rolling process, the comprehensive regulation and control method combining driving motor double-closed-loop speed regulation control, hydraulic cylinder pressing closed-loop control and thickness delay correction is provided. A multi-rolling-mill interconnection control system is constructed by coupling the rolling mills, the loops, the driving motors and the hydraulic cylinders, and high-precision dynamic adjustment of the tapping thickness is achieved. A double-closed-loop feedback control method is adopted, the rotating speed of a driving motor is adjusted by combining a rotating speed loop and a current loop, rolling force is dynamically adjusted through a hydraulic cylinder, and a thickness delay correction system is introduced to compensate thickness transmission errors between racks. According to the method, the thickness response time and overshoot of the hot rolling mill can be reduced, the thickness control precision and the system stability are improved, and the method has important guiding significance and engineering application value for high-precision hot continuous rolling production.

The invention discloses a lifting platform for offshore pile top construction, and relates to the technical field of ocean engineering, the lifting platform comprises a main body mechanism, four lifting mechanisms are movably inserted in the inner surface wall of the main body mechanism, and two driving mechanisms are fixedly mounted on the outer surface walls of the four lifting mechanisms; the lifting mechanism comprises a fixing pile. According to the lifting platform, after the device is started, a motor can enable two half gears to synchronously and reversely rotate through a rotating shaft and a transmission gear, so that racks on the left side and the right side are sequentially driven to start to move, then the platform is driven to ascend and descend, and the platform is clamped by means of cooperation between two metal clamping blocks and positioning holes; compared with a traditional gear and rack clamping structure, the clamping tongue is matched with the fixing hole so that external interference can be better resisted and the stability of the lifting platform can be ensured on the sea where the environment is severe and stormy waves are large, meanwhile, the structure is relatively simple and reliable, the fault rate is low, and therefore the construction safety is improved.

The utility model discloses a device for cleaning backfill soil in a lattice column, comprising a soil crushing mechanism and a jacking mechanism, wherein the soil crushing mechanism comprises a Lelo triangle drill bit, a square limiter, an eccentric transmission shaft and a motor, wherein the square limiter is arranged below the Lelo triangle drill bit, the eccentric transmission shaft is arranged below the square limiter, the upper and lower ends of the eccentric transmission shaft are respectively connected to the Lelo triangle drill bit and the motor, and under the joint action of the square limiter and the eccentric transmission shaft, the motor drives the Lelo triangle drill bit to perform eccentric rotation; the jacking mechanism is composed of a jacking chain, a chain storage box, and a gear set, and the jacking chain is driven to jack upwards by the rotation of the gear set, and the jacking chain has the effect of mutual engagement, and the cross section after engagement is rectangular, the jacking mechanism and the soil crushing device are connected and fixed by a base and a connector, and the utility model has a fast construction speed for cleaning backfill soil in a lattice column, can effectively reduce labor consumption, and reduce engineering cost.

The invention relates to the technical field of highway engineering, and discloses an environment-friendly dust falling device for highway engineering construction, which comprises a vehicle body, a box body is fixedly connected to the top of the vehicle body, a lifting plate is arranged above the box body, and a dust falling mechanism is arranged on the box body. The dust falling mechanism comprises a water tank, a submersible pump, a folding pipe, a hollow pipe, a first motor, a connecting pipe, a three-way pipe and an atomizing nozzle, the water tank is fixedly connected to the top of the inner wall of the box body, and the submersible pump is arranged at the bottom of the inner wall of the water tank. An electromagnet can be driven to move according to the wind direction of a construction site by arranging a wind indicator, an atomizing nozzle can be driven to rotate according to the wind direction of the site by arranging a first motor, a hollow pipe, a rotating disc, a clamping base, the electromagnet, a spring and a magnet block, the atomizing nozzle is opposite to the wind direction, and therefore water mist sprayed by the atomizing nozzle can make better contact with dust; therefore, the dust falling effect of the construction site is improved.

The invention discloses a vehicle-mounted rail bolt oiling operation device and a rail engineering vehicle, the oiling operation device runs on a rail along with the rail engineering vehicle, the device comprises a detection execution mechanism, a grease tank, a pressurizing device and a control system, and the detection execution mechanism comprises a sleeper bolt detection sensor and a spray gun. When the oiling operation is carried out, the pressurizing device sucks grease from the grease box and pressurizes the grease to the required pressure. When the sleeper bolt detection sensor detects the sleeper bolt, a signal is sent to the control system, the control system determines the delay duration according to the collected vehicle speed, after the output signal is delayed, the solenoid valve controls the gas circuit to be opened, and the high-pressure grease is sprayed to the sleeper bolt through the spray gun. The rail bolt oiling device can solve the technical problems that an existing oiling operation device cannot conduct all-dimensional effective spraying on rail bolts, and the oiling operation quality is not high.

The invention discloses a permanent magnet synchronous motor joint simulation method, which comprises the following steps of: firstly, establishing a permanent magnet synchronous motor finite element model in Maxwell, and defining material nonlinear characteristics and motion boundary conditions; a motor drive control circuit is constructed in Simplorer, the finite element model is imported through a Twinbuild tool, and an electromagnetic-circuit joint simulation environment is established; creating a motor multi-body dynamic model and an external load model in Adams, and respectively exporting the motor multi-body dynamic model and the external load model into an FMU format and an Adamssub format; and finally, establishing an electromagnetic-circuit-mechanism joint simulation platform in the Simulink, and executing joint simulation. Compared with traditional joint simulation, according to the method, through electromagnetic-circuit-mechanism three-field real-time interaction, the motor can sense the load sudden change working condition, then the torque and current of the motor are rapidly adjusted through the PI controller, the problems that in engineering practice, the external load of the motor is not real, and the abnormal load is detected are solved, and the reliability of the motor is improved. And the crossing from an ideal load to an actual load is realized.

The utility model relates to the technical field of hydraulic engineering detection, in particular to a reinforcing steel bar strength detection device for hydraulic engineering, which comprises a base, the top of the base is symmetrically and fixedly connected with fixing plates, the fixing plates are connected with a force application rod through a lifting mechanism, and one side, close to the force application rod, of each fixing plate is provided with an L-shaped reinforcing steel bar placing groove. And one side of the fixed plate is symmetrically and fixedly connected with reinforcing steel bar placing hoppers. A servo can control a driving gear to slowly rotate at a constant speed clockwise through a driving rod, the driving gear can control a feeding plate to move outwards from the interior of a reinforcing steel bar placing groove through a tooth groove, then reinforcing steel bars in a feeding opening can fall into the reinforcing steel bar placing groove, and then the driving gear is controlled to rotate anticlockwise; the feeding plate can be controlled by the tooth groove to move towards the inside of the reinforcing steel bar placing groove and push the reinforcing steel bars to a detection position, and the operation is cycled, so that a plurality of reinforcing steel bars can be respectively fed into the reinforcing steel bar placing groove for detection, and the operation is relatively convenient.

The invention discloses a cofferdam device for hydraulic engineering construction and an operation method thereof.The device comprises a cofferdam, buffering mechanisms arranged on the periphery of the exterior of the cofferdam, reinforcing mechanisms arranged on the periphery of the exterior of the cofferdam and driving control mechanisms arranged at the four corners of the cofferdam, and the cofferdam is composed of supporting columns and steel plates and forms a rectangular frame structure; the reinforcing mechanism is connected with a first fixing block and a second fixing block through a reinforcing rod to enhance the stability of the cofferdam, the driving control mechanism is composed of a forward and reverse motor, a sliding groove, a threaded rod and a sliding block and can automatically adjust the position of the buffering mechanism according to the change of the water level, and the buffering mechanism comprises a supporting rod, an arc-shaped first elastic plate, an arc-shaped second elastic plate and a first damper. Impact energy is absorbed through elastic deformation and damping force, and the cofferdam is protected against impact of water flow and floating objects. The position of the buffer mechanism can be automatically adjusted according to the water level condition, and it is ensured that the buffer mechanism is located at the optimal working position all the time so as to meet the buffer requirements under different water level conditions.

The invention discloses a pipeline multi-angle cutting and welding integrated device for hydraulic engineering, and relates to the technical field of pipeline machining. And the clamping mechanism is arranged in the middle of the top end of the machine body and used for clamping the pipeline. Through cooperation of the first mechanical arm, the clamping mechanism, the cutting mechanism and the first splicing mechanism, a pipeline is automatically cut into a first pipe section with a saddle opening and a second pipe section with a splicing groove; under the action of the first mechanical arm and the welding mechanism, automatic alignment and splicing of a saddle opening and a splicing groove are achieved, preliminary welding is completed, then under the action of the second mechanical arm and the welding mechanism, comprehensive welding of the saddle opening and the splicing groove is achieved, automatic production of the equal-diameter three-way pipe is completed, operation of workers is not needed, the labor cost is saved, and the production efficiency is improved. And the production efficiency of the equal-diameter three-way pipe is improved, and the requirements of workers are met.

The invention relates to the technical field of reinforcement cage butt joint, and particularly discloses a reinforcement cage butt joint device for engineering construction, which comprises a first reinforcement cage arranged in a pile hole, a second reinforcement cage arranged at the top of the first reinforcement cage, a threaded sleeve arranged on the first reinforcement cage, and a barrel arranged outside the first reinforcement cage, the top surface of the barrel is rotationally connected with a supporting ring; a screwing mechanism is arranged on the top surface of the supporting ring; the screwing mechanism comprises a supporting plate installed on the top face of the supporting ring. First electric push rods are mounted on the top surface of the supporting plate; first motors are mounted at the output ends of the first electric push rods; the output end of the first motor is fixedly connected with a first rotating shaft; first straight gears are fixedly connected to the top ends of the first rotating shafts; a gear column is fixedly connected to the threaded sleeve; the supporting plate is provided with a pushing piece capable of pushing the first electric push rod to move so that the first straight gear can be meshed with the gear column. And automatic rotation of the threaded sleeve can be achieved through the screwing mechanism, the trouble of manually rotating the threaded sleeve is reduced, and the working efficiency is improved.

The invention relates to the technical field of mechanical engineering, in particular to a reciprocating type vertical lifting device.Two stand columns are fixedly connected to the top of a rail car, ejector rods are fixedly connected to the tops of the stand columns, a dynamic lifting mechanism is fixedly connected to the side faces of the stand columns, and a fixed side plate is arranged in the middle of the dynamic lifting mechanism; winding drums are arranged on the side faces of the two sides of the fixing side plate, a bearing mechanism is arranged in the middles of the two stand columns, a bearing table is arranged in the middle of the bearing mechanism, a balance mechanism is arranged at the bottom of the bearing mechanism, a balance base is arranged in the middle of the balance mechanism, and a balancing weight fixing base is arranged at the bottom of the balance base; a deceleration block is arranged on the side face of the balance mechanism, capsizing moment generated by goods deviation and position is counteracted, the deviation problem of the bearing mechanism is solved, friction between the bearing mechanism and the stand column guide rail is reduced, the stress of the root of the stand column is reduced, and the maintenance period is prolonged.

The invention belongs to the technical field of railway engineering mechanical equipment manufacturing, and provides a narrow body flash welding and heat treatment normalizing all-in-one machine and method.The all-in-one machine comprises a static end clamping mechanism, a movable end clamping mechanism, a pressure maintaining and overlap pushing mechanism, a normalizing assembly, a center shaft upsetting structure and a clamp balance oil cylinder; the static end clamping mechanism and the movable end clamping mechanism are distributed at the two ends of the all-in-one machine, the static end clamping mechanism and the movable end clamping mechanism are connected in a penetrating mode through a center shaft upsetting structure, and a pressure maintaining and overlap pushing mechanism and a clamp balance oil cylinder used for providing outward supporting force for a clamp are installed between the static end clamping mechanism and the movable end clamping mechanism. And a normalizing assembly combining rotary mold closing and turnover mold closing is mounted on the pressure-maintaining overlap pushing mechanism. According to the clamp balance oil cylinder, the stability of a welding machine and the straightness of a welded steel rail are improved. The bead pushing tool rest is guided by a central shaft, the rigidity of the bead pushing mechanism is increased, the normalizing assembly adopts a mode of combining rotary die assembly and turnover die assembly, and the requirement for operation in narrow space of a turnout can be met.

The invention discloses a self-adaptive parallel clamp and method suitable for a bush-disc test, and belongs to the technical field of mechanical engineering, the self-adaptive parallel clamp comprises a supporting mechanism, a parallelism adjusting mechanism is arranged in the supporting mechanism, the lower end of the supporting mechanism is connected with a clamping rod, the lower end of the clamping rod is provided with a sample clamping mechanism, and the sample clamping mechanism is provided with a clamping mechanism. And a movement mechanism is arranged at the lower end of the sample clamping mechanism. By adopting the self-adaptive parallel clamp suitable for the lining-disc test, the problem of parallelism error between the lining and the disc is solved, so that the horizontal load error and the friction force and friction coefficient measurement error caused by the error are reduced, and a more accurate surface-surface friction wear disc test is realized.

The utility model provides an adjusting device of a heavy load leveling mechanism of a track engineering vehicle, which comprises a jack, the bottom of the jack is rotatably connected with a rotating seat, the bottom of the rotating seat is fixedly provided with a bottom plate, the side surface of the bottom plate is fixedly provided with a side plate, the top of the side plate is fixedly provided with a threaded sleeve, and the threaded sleeve is fixedly provided with a threaded hole. The inner side face of the threaded sleeve is in threaded connection with a lead screw, a rotating handle is fixedly installed at the top of the lead screw, and a top plate is rotationally connected to the top of the rotating handle. The adjusting equipment of the heavy-load leveling mechanism of the rail engineering vehicle effectively solves the problems that due to the fact that the weight of leveling mechanism equipment and materials is large, the deflection change of a vehicle frame is large under the action of gravity, the positions of three installation bases and hinge pins are changed, the coaxiality of the hinge pins is out of tolerance, and the service life of the hinge pins is prolonged. And therefore, the leveling mechanism is blocked in rotation and even cannot rotate.

The invention discloses a multi-stage damping semi-active magnetoelectric damper capable of recycling energy. Relates to the technical field of engineering structure shock-absorbing dampers, and comprises a transmission mechanism, the transmission mechanism comprises a spring box, power springs, steel wires and a rotor, the spring box is provided with an upper part and a lower part, the steel wires and the power springs are respectively arranged in the upper part and the lower part of the spring box, the rotor is arranged in the middle of the spring box, and one ends of the two steel wires are connected and wound on the rotor; lug rings are arranged at the other ends of the two steel wires, the inner ring ends of the two power springs are fixed to the rotor in a penetrating mode, and the other ends of the two power springs are connected with the spring box; the buffer mechanism comprises a first-stage buffer unit, a second-stage buffer layer and a third-stage buffer unit, and the first-stage buffer unit, the second-stage buffer layer and the third-stage buffer unit are sequentially arranged on the two spring boxes; by means of the novel damper capable of achieving multi-order mixed control over acceleration, speed and displacement, an engineering structure can meet the self-adaptive damping requirement during vibration.

The invention relates to the technical field of pipeline machining, in particular to a hydraulic engineering pipeline cutting and welding integrated device which comprises a mounting base, two clamping seats are arranged at the top of the mounting base, circular through grooves are formed in the clamping seats, and clamping and fixing mechanisms are connected into the circular through grooves. An opposite moving mechanism is connected between the two clamping seats, two fixing frames are fixedly connected to the top of the mounting base, and a cutting machine is arranged in each fixing frame; the distance between the welding gun and the pipeline is kept synchronous all the time under the action of the elastic receding mechanism, and when the pipeline is subjected to slope cutting and the cutting face is oval, the welding gun can still keep the same moving distance under the oval moving track, so that the welding effect of the pipeline is improved, and the welding efficiency is improved. And the welding difficulty caused by the change of the pipeline cutting angle is reduced.

The invention discloses a compression type packer capable of being repeatedly set, and belongs to the technical field of oil production engineering equipment. A rubber barrel shaft is arranged on the outer circumference of a center pipe, a rubber barrel is arranged on the outer circumference of the rubber barrel shaft, a first sealing ring is arranged at one end of an upper pressing ring, an upper connector is arranged at the other end of the first sealing ring, a cylinder sleeve is arranged at the other end of the rubber barrel shaft, and an anti-resistance nail is arranged on the cylinder sleeve; and a plurality of setting valve core mechanisms and unsetting valve core mechanisms are arranged on the outer circumference of the second sealing ring on the outer circumference of the central pipe. The setting compression type packer is pressed to extrude the first medium container in the packer, hydraulic oil in the first medium container flows into the second medium container through the upper one-way constant-pressure valve element, the hydraulic oil in the second medium container is increased, the pressure is increased, and the internal hydraulic pressure is reduced by increasing the size of the second medium container; the second medium container extrudes the rubber barrel through the central pipe, the rubber barrel expands, the outer diameter is increased, a pipeline is packed, setting and unsetting of the compression type packer are achieved, and the actual production requirement is met.

The invention relates to an underground engineering surrounding rock instability process simulation test system under a deflection stress field. The system comprises a base, a guide rail, a front cover frame, a rear cover frame, a servo loader, a loading frame, a loading plate, a hydraulic motor, a gear and the like. A plurality of hydraulic loading devices are arranged on the inner surface of a concentric-square-shaped loading frame in the test system, active loading in different directions is provided for a test model, and a chamber surrounding rock stress field is simulated. And a plurality of groups of loading devices are arranged along the inner surface of the loading frame to form a circular loading mechanism. The test model is a circular sample, the test model is driven by a motor to deflect through three surrounding hoops on the surface, the front cover frame and the rear cover frame are connected through a penetrating pull rod and a hydraulic nut, and front and rear face passive constraint is provided for the test model. The simulation test system can realize an underground engineering surrounding rock instability whole-process similar simulation test under stress deflection environment conditions such as different stress field intensities, different included angles between a stress main shaft and a chamber orientation, stress field stress main shaft static and dynamic deflection and the like.