130 results about "Relative slip" patented technology

The invention discloses a grinding and polishing removal error compensation control method considering the dynamic error of a robot, and the method achieves the prediction of the grinding and polishing removal depth through the building of a grinding and polishing removal depth prediction model considering the dynamic error of the robot, and solves the problem of non-linear distribution of the contact pressure and relative sliding speed of a side edge during the machining of the side edge. The limitation of a traditional Hertz model in narrow space side blade contact mechanical modeling is broken through, and accurate prediction of the grinding and polishing removal amount and the surface appearance is achieved; and then an offline-online collaborative layered compensation mechanism is provided, a space-time transmission mechanism of robot errors under time-varying dynamics is identified, accurate tracking of a deterministic grinding and polishing trajectory is achieved, and the grinding and polishing contour precision of the whole component is improved.

The present invention relates to the technical field of plastic bag processing, and discloses a shearing guide device for plastic packaging bags, comprising a front crossbeam 1, a guide portion 4 being provided on the front crossbeam 1 for guiding a flattening tool to contact or stay away from stacked plastic bags, the guide portion 4 comprising an L-shaped arm 41, the bottom end of the L-shaped arm 41 being fixedly connected to the top of one end of the front crossbeam 1, the top of the L-shaped arm 41 being fixedly connected to a sliding sleeve 42, a guide groove 44 being provided at the top of the L-shaped arm 41, the guide groove 44 being located in the sliding sleeve 42, a tension portion 5 being provided on the guide portion 4 for providing tension and flattening the surface of the stacked plastic bags, the device adopts a gear rack mechanism driven by a motor of the guide portion, so that a roller applies adjustable tension to the free side of the plastic bag, forming a dynamic balance with the unilateral pressure of the clamping portion, effectively offsetting the nonlinear stress field inside the stack, reducing the relative slip between layers, and solving the dislocation problem caused by excessive shear stress on the free side.

The invention discloses an external prestress design method and system combined with a shield segment pre-embedded sliding groove, and the method comprises the steps: after the shield segment is assembled, anchoring a steel beam at the outer side of the segment through the sliding groove, arranging a plurality of displacement sensors along the segment pre-embedded sliding groove, obtaining the actual displacement data of the steel beam at different tensioning stages, and calculating the actual displacement data of the steel beam; calculating the relative slippage displacement between the steel beam and the sliding chute at a certain position along the direction of the sliding chute; according to initial prestress tension applied to the tensioning end and the relative slippage displacement, effective prestress tension transmitted to the duct piece through the steel beam at a certain position in the sliding groove direction is calculated, and according to the effective prestress tension, the maximum forward main stress of the section at the certain position in the sliding groove direction is calculated; and according to the relative slippage displacement and the maximum forward principal stress, setting a comprehensive design objective function, and adjusting a design variable to enable the comprehensive design objective function to be optimal.

The application relates to the field of lifting equipment, in particular to a lifting robot capable of emergency stop. The lifting robot comprises a machine shell, a rolling disc assembly, a guide assembly, an emergency stop mechanism and a limiting mechanism; a driving device is arranged in the machine shell; the rolling disc assembly is provided with a rope passing channel, and the rolling disc assembly is connected with the output end of the driving device; the guide assembly comprises a guide wheel and a guide frame; the emergency stop mechanism comprises a fixing base, an abutting frame, a pressing handle, a fixing sleeve, a torsional spring, a sliding rod, a sliding frame and an elastic piece b; the fixing sleeve is arranged on the fixing base and abuts the abutting frame on the fixing base; a plurality of limiting grooves are circumferentially arranged at the end of the abutting frame away from the fixing sleeve; the torsional spring is sleeved on the outer periphery of the fixing sleeve and connected with the fixing sleeve and the abutting frame at two ends; and the limiting mechanism is arranged on the fixing base and forms a rope passing space with the fixing base. The lifting robot can conveniently abut the rope by pressing the pressing handle, so as to prevent relative slipping.

This invention belongs to the field of bridge construction, specifically a method for ensuring bridge bearings meet the requirements of tension displacement and seismic consolidation. The method involves filling the relative sliding areas inside the bridge bearing with a medium, which is a soft, elastic material. Before filling, the medium is encapsulated in a medium membrane. During bridge tensioning, if the tensioning speed is less than the design value, the medium deforms, releasing the tension stress at the relative sliding areas inside the bridge bearing. During an earthquake, if the displacement speed exceeds the design value, the medium remains unchanged, thus consolidating the bridge bearing with the bridge deck and piers as a unified whole to jointly withstand seismic forces. This invention, by filling the bridge bearing with a medium, enables the bridge bearing to function normally during bridge erection and under special conditions such as earthquakes, thus improving the functionality of bridge bearings.

The application discloses a locking oil cylinder connecting structure for an injection molding machine, which is characterized in that a first spherical surface structure is arranged at one end of a piston rod of the locking oil cylinder, a convex circular arc surface is arranged on a nut, and a concave circular arc surface is arranged on a nut pad block, so that when a micro-arch deformation of a movable die plate occurs, the first spherical surface structure can slightly move in a cylinder sleeve, thereby reducing the eccentricity of the piston rod caused by the deformation of the movable die plate; meanwhile, the piston rod offset drives the nut to offset, so that the convex circular arc surface on the nut relatively slides along the concave circular arc surface of the nut pad block, so that the piston rod cannot keep a deformed state, and the piston rod can keep in the center position of the cylinder sleeve, thereby effectively preventing the occurrence of oil seepage.

The invention discloses a high-strength anti-aging rubber sealing ring and a preparation method thereof, and belongs to the technical field of sealing rings, the rubber sealing ring is endowed with excellent mechanical properties by taking a self-synthesized expansive type dispersion filler as a reinforcing phase, the expansive type dispersion filler is of a core-shell structure, a core layer is made of expanded graphite, a shell layer is made of brush-shaped silicon dioxide, and the expansive type dispersion filler is of a core-shell structure. The composite structure can disperse stress by generating relative slippage, and brush-shaped silicon dioxide can physically block oxygen and heat, so that permeation of oxygen into rubber at high temperature is reduced, and oxidative fracture of a rubber molecular chain is delayed; when the high-strength anti-aging rubber sealing ring is used in a high-temperature scene, the expansion type dispersion filler can expand, the expansion effect can fill tiny cracks and pores generated by thermal expansion and cold contraction of a rubber matrix, and permeation of oxygen and heat aging factors into rubber is reduced.

The application discloses a kind of automobile door electric opening and closing mechanism, it is related to automobile technical field, it includes: transmission part, the transmission part includes moving rod and hinged seat, hinged seat is fixed in vehicle body, moving rod one end is hinged with hinged seat;Moving rod telescopic sliding fit in the inside of door, door is formed with radial limit to transmission part;Door opening and closing process drives moving rod to rotate around the hinged axis of hinged seat, and moving rod and door are relatively slipped along the length direction of moving rod itself;Driving part, the driving part is fixed in the inside of door and is synchronous with door movement, driving part power output end is transmission cooperation with moving rod;Driving part works by moving rod to vehicle body and applies pulling force or thrust, and the reaction force of vehicle body is used to drive door to complete electric opening and closing relative to vehicle body.This application has the effect of simplifying existing door opening and closing structure, improving space utilization, reducing production cost.

This application relates to a machine tool for machining irregularly shaped shafts, specifically in the field of shaft machining. It includes a bed and a center rest. The bed is rotatably connected to a chuck for clamping and rotating the workpiece. The center rest includes an inner ring and an outer ring, both coaxial with the rotation axis of the chuck. The lower end of the outer ring is slidably connected to the bed in a horizontal direction. The inner ring and outer ring are rotatably connected coaxially. The inner ring has several support claws arranged circumferentially, one end of each support claw serving as an abutment end extending into the inner ring. The inner ring is equipped with an adjustment assembly for adjusting the distance between the abutment end and the inner ring axis. After the shaft workpiece enters the center rest, the abutment end abuts and limits the workpiece from different directions. The rotation of the workpiece causes the inner ring to rotate synchronously. Because there is no relative slippage between the support claws and the workpiece, regardless of whether the workpiece cross-section is perfectly circular, it provides good support for the workpiece. Therefore, there is no need for pre-machining of grooves, thus improving machining efficiency.

The utility model discloses a stator iron core and a motor, the stator iron core comprises a first iron core punching sheet group, the first iron core punching sheet group comprises a plurality of first iron core punching sheets which are stacked along the axial direction, each first iron core punching sheet comprises a plurality of first oil inlet grooves which are arranged at intervals along the circumferential direction, and the first oil inlet grooves extend inwards from the periphery of the first iron core punching sheets; each first oil inlet groove comprises a first oil inlet and a closed end which are arranged from outside to inside, the sectional area of the first oil inlet is smaller than that of the closed end, and the first oil inlet grooves of every two adjacent first iron core punching sheets are in one-to-one correspondence in the axial direction to form a plurality of first oil inlet channels. According to the utility model, on the premise of ensuring the cooling of the stator core and the winding, the contact area between the stator core and the shell can be increased, the friction force between the stator core and the shell is improved, relative slippage does not occur between the stator core and the shell in the operation process of the motor, and the safety coefficient is higher.

This invention discloses a corrugated interlocking FRP component connection node and connection method, belonging to the field of civil engineering technology. The connection node includes an FRP component, steel fasteners, a structural adhesive layer, and high-strength bolts. The contact surfaces of the FRP component and the steel fasteners are both processed into matching corrugated interfaces. A structural adhesive layer is placed between the corrugated interfaces, and the connection is achieved through assembly with high-strength bolts. Compared to traditional adhesive-bolt hybrid connection nodes, this invention utilizes the corrugated interlocking interface to enhance the force transmission path. The corrugated interface extends the shear path of the adhesive layer and increases the effective bonding area. When the interface exhibits a relative slippage tendency, the corrugated interface provides anti-slip capability through the interlocking of crests and troughs. This results in a synergistic force transmission structure where corrugated interlocking, interface bonding, and bolt bearing work together, thereby reducing stress concentration at the hole edges and improving the stiffness, load-bearing capacity, and overall synergistic stress performance of the connection node.

The utility model discloses a prefabricated assembly type frame structure damper which comprises a prefabricated concrete column, the right side of the prefabricated concrete column is fixedly connected with a column embedded part, the right side of the column embedded part is provided with a beam embedded part, the right side of the beam embedded part is provided with a prefabricated concrete beam, and the prefabricated concrete beam is fixedly connected with the column embedded part. The top of the column embedded part and the top of the beam embedded part are each provided with a first flange cover plate. When an earthquake comes and before a prefabricated node does not reach a relative slippage bending moment, relative slippage is generated after friction force between a web, a flange cover plate and an embedded part reaches the maximum value of static friction force, and the node bending moment reaches a sliding bending moment; the displacement of the cover plates and the embedded parts reaches the maximum value, the stress of the bolts is converted, the joints are stressed through connection, in the process, except the cover plates which are replaceable energy consumption parts, other parts and concrete basically work elastically, and only damaged parts need to be replaced after an earthquake.

The invention discloses a telescopic crane rail connector, a rail system and a mounting method, and relates to the technical field of crane rail connecting devices of heavy-load moving vehicles. The connector is arranged between a first track and a second track and comprises a base, a first connector, a second connector, a locking mechanism and a restraining mechanism. The base is fixed to a foundation, the first connector is integrally connected with the first rail, the second connector is integrally connected with the second rail, and the joint faces of the first connector and the second connector form a non-orthogonal continuous interface in the longitudinal direction of the rails to guide wheels to achieve smooth transition. The locking mechanism can releasably maintain the joint of the two and allow the two to relatively slide along the longitudinal direction of the track under temperature stress; the bottom of the restraining mechanism is fixed to the base, and the top of the restraining mechanism is connected with the lower portion of the first connector and / or the second connector to limit vertical and transverse displacement. The connector adapts to adverse effects of temperature changes on the track, and ensures stable and safe operation of the vehicle.

The invention relates to a follow-up material supporting technology for aluminum curtain wall plate bending forming, and belongs to the technical field of metal plate machining. A material supporting area is divided into a first near-bending area, a second middle supporting area and a third free end follow-up area, and differentiated material supporting modes of avoiding guiding, same-speed face supporting and rolling traction are adopted; the middle area and the free end area are jointly arranged on the same follow-up base, so that self-driving synchronous follow-up of the plate is realized, and the problems of relative slippage, geometric interference, overhigh local pressure intensity, unstable supporting and the like caused by displacement and overturning of the plate during fixed material supporting in the prior art are effectively solved; the surface defects of scratches, indentations, atomization marks and the like of the visual surface of the aluminum curtain wall plate are remarkably reduced, meanwhile, the consistency and the rebound stability of the bending angle are improved through stable load transfer and continuous surface supporting, and therefore reliable machining under the working conditions of deep bending and high flanging is achieved on the premise that the high appearance quality is guaranteed.

The invention relates to the technical field of bridge structures, in particular to a trapezoidal scale type directional anti-pulling and non-shear-resisting connecting device and a manufacturing method thereof.The trapezoidal scale type directional anti-pulling and non-shear-resisting connecting device comprises a connecting piece, outer wrapping metal sheets and reinforcing steel bars, a cavity used for pouring concrete is formed in the obliquely-arranged connecting piece, and a transverse hole is formed in the connecting piece; the outer wrapping metal sheet is matched with the connecting piece in shape and arranged on the outer surface of the connecting piece in an attached mode, and a transverse through hole corresponding to the transverse open hole of the connecting piece is formed in the outer wrapping metal sheet; the steel bars penetrate through the transverse open holes of the connecting pieces and the transverse through holes of the outer wrapping metal sheets and penetrate through the connecting pieces and the outer wrapping metal sheets. The connecting piece is designed to be of the inclined structure with the inner cavity, when concrete is poured, the cavity can be filled with the concrete, the concrete and the outer concrete plate form a whole, a sliding interface is constructed, and when the device bears longitudinal loads, controllable and directional relative sliding can be generated in the inclined direction.

The invention provides a nondestructive testing system and method for the bearing capacity of an uplift pile, and the system comprises a strain sensing unit which comprises a distributed annular fiber grating array disposed on a target uplift pile and is used for detecting the strain information of the target uplift pile on the whole pile length; the displacement monitoring unit comprises an MEMS inclinometer and a laser range finder which are arranged at the top of the pile, and an LVDT displacement meter pre-embedded in a pile-soil interface, and is used for synchronously monitoring absolute displacement and relative slippage of the target uplift pile; and the processor unit is used for carrying out inversion calculation on the bearing capacity of the target uplift pile by adopting an FPGA accelerated LSTM-GRU hybrid neural network based on the strain information, the absolute displacement and the relative slippage. According to the method, the differential coupling model of the axial strain of the pile body, the relative displacement of the pile soil and the side friction resistance is established, accurate mapping from the distributed optical fiber strain to the bearing capacity subitem index is achieved, therefore, the nondestructive testing target is achieved, the detection cost is low, and the detection accuracy and reliability are high.

The invention relates to a load transfer analysis method, system, equipment and medium based on a CFSC structure of a steel-concrete combined section, and the method comprises the steps: building a unit mechanical model of the CFSC structure based on equivalent spring assumption, proposing a first balance equation of the unit mechanical model, setting a node interval for the unit mechanical model, and setting a second balance equation for the unit mechanical model; deducing the first balance equation based on the node interval to obtain a first load transfer expression of the unit mechanical model; deducing the first load transfer expression based on interface bonding force analysis, interface relative slip analysis, interface friction force analysis, shear load analysis and difference estimation analysis to obtain a second load transfer expression; a combined mechanical model of the steel-concrete joint structure is constructed, the steel-concrete joint structure comprises a plurality of CFSC structure units, a second balance equation of the combined mechanical model is proposed based on the strain plane section assumption, the second balance equation is deduced based on the variable matrix, and a third load transfer expression of the combined mechanical model is obtained.

A supporting structure of a feeding conveying line of a tower belt machine comprises a plurality of stand columns arranged at intervals and a feeding line erected on the stand columns and used for conveying concrete, climbing sleeve frames are installed on part of the stand columns, rolling supports are installed on the top faces of the climbing sleeve frames and part of the stand columns, and rotating supports are installed on part of the stand columns. The feeding line is in lap joint with the rolling support and the rotating support, and the feeding line and the rolling support slide relatively. According to the design of the supporting structure, the height and angle of the feeding conveying line can be adaptively adjusted according to the change of the concrete pouring height.

This invention relates to a symmetrical, stable, and collapsible mechanism, comprising a mounting base, an adjusting base, and a contact arm. The contact arm is rotatably mounted on the mounting base. The mounting base and the adjusting base are axially slidably disposed relative to each other along a transmission shaft. A collapsible assembly is disposed on the adjusting base. When the mounting base and the adjusting base move relative to each other, a limiting rod slides and abuts against a sliding member, pushing the sliding member to rotate around a pivot point, causing the telescopic elastic member to stretch or compress. The collapsible assembly further includes a connecting rod, one end of which is rotatably mounted on the adjusting base, and the other end is hinged to the contact arm. When the mounting base and the adjusting base slide relative to each other, the contact arm swings under the action of the connecting rod. Using the above technical solution, this invention has a simple structure, rapid response, stable output of massage force during normal operation, and rapid collapse upon impact, effectively reducing the risk of injury to occupants.

The utility model relates to transformer iron core technical field, concretely is a kind of anti-displacement staggered buckling dry-type transformer iron core, including iron core column body and the iron yoke of adaptation, the iron core column body top end is equipped with the overlap end, and the iron yoke end side is all provided with overlap end, the overlap end of the iron core column body is spaced apart and is provided with multiple recess parts, the overlap end of the iron yoke is provided with the protruding part of the recess part complement, the utility model utilizes the mechanical limiting action of concave-convex structure and limits the relative slip between iron core column body and iron yoke, the purpose of preventing iron core column body and iron yoke from displacement in the process of transportation, installation and operation is realized.

The application discloses a continuous type mechanical arm in the technical field of micro mechanical arms and an acquisition method thereof, and aims to solve the problems of the continuous type mechanical arm and the acquisition method thereof in the prior art. The continuous type mechanical arm comprises two spiral bodies and engaging structures of the two spiral bodies. The two spiral bodies can be engaged with each other, and the engaging structures can meet the action requirements of the curved arm body through the engagement effect between the engaging structures, and can provide better structural rigidity, thereby significantly inhibiting the axial instability and relative slip of the framework under high antagonistic tension from the bottom layer of the configuration, breaking through the technical bottleneck of the bearing limitation of the conventional flexible framework, realizing the significant enhancement of the macro equivalent rigidity, and improving the bearing capacity of the mechanical arm. The corresponding acquisition method fully considers that the engaging structure is the primary factor influencing the bending and action capacity of the continuous type mechanical arm, and therefore, the outer diameter of the mechanical arm is taken as the primary design parameter, and the iterative design of the design parameters of the engaging structure is carried out based on the design background. The method is simple and clear, and the design efficiency is improved.

The invention discloses a beam seam dislocation type bidirectional sliding anti-seismic railway steel rail fastener system which comprises a steel rail, an iron base plate, a sleeper, a rail clamping plate and an elastic steel plate, an insulating strip is arranged between the elastic steel plate and the hole wall of a strip-shaped through hole of the steel rail, a rubber base plate is arranged between the steel rail and the iron base plate, and the elastic steel plate is arranged between the rubber base plate and the iron base plate. The insulating friction base plate is arranged between the iron base plate and the sleeper, and the main beam is allowed to drive the sleeper to move transversely when the earthquake beam seam is transversely staggered, so that transverse relative displacement is generated between the steel rail and the elastic steel plate, and structural damage is avoided. Through the strip-shaped through holes, the elastic steel plates and three layers of friction interfaces, the two-way displacement freedom degree of the steel rails is achieved, and the problem that the steel rails and fasteners are extruded and damaged due to beam seam dislocation under an earthquake is solved. During an earthquake, the sleeper drives the elastic steel plate to move transversely and generate relative slippage with the steel rail to release stress, structural damage is avoided, only the anchor bolts need to be tightened again after the earthquake, parts do not need to be replaced, and the first-aid repair time is shortened.

The application relates to the field of electronic component connectors and discloses a vibration-resistant enhanced structure of a DDR module connector and a preparation method, which comprises an insulating body, a negative Poisson's ratio microskeleton array, a piezoelectric doped shear thickening gel, an asymmetric dielectric guide rail and a microfluid pressure relief flow channel, a slot for accommodating a DDR module is arranged in the insulating body, and a metal terminal array is embedded in the two side walls of the slot in the longitudinal direction. In the application, the self-adaptive mechanical locking mechanism is constructed by the negative Poisson's ratio microskeleton array and the piezoelectric doped shear thickening gel, under the vibration working condition, the longitudinal micro-displacement makes the cells be stretched to produce transverse expansion deformation, lateral pressure is applied to the DDR module, the local shear rate is increased to promote the agglomeration of nanoparticles in the gel, and the nanoparticles are changed from a liquid phase into a solid phase. The structure dissipates kinetic energy by internal friction, effectively limits the relative sliding of the DDR module and avoids fretting wear of the golden fingers.

The utility model provides a continuous casting crystallizer, and relates to the field of continuous casting equipment. The continuous casting crystallizer comprises an inner pipe, an outer pipe, an outer pipe, an outer pipe and an inner pipe body, and the inner pipe body is in an annular shape and extends from one end to the other end to form the inner pipe; the water jacket is arranged outside the inner pipe in a sleeving mode, a certain interval is formed between the water jacket and the inner pipe, and a narrow water seam is formed; the water jacket is sleeved with the shell, a certain interval is formed between the shell and the water jacket, and an outer side cavity is formed; wherein the narrow water seam communicates with the outer side cavity, and a first sliding assembly and a second sliding assembly are arranged at the two ends of the inner pipe and the two ends of the shell correspondingly; the first sliding assembly and the second sliding assembly can relatively slide in the circumferential direction of the inner pipe, so that the inner pipe can rotate relative to the shell. According to the utility model, the negative slippage time can be shortened, and meanwhile, the metal demolding effect is ensured.

The invention discloses a method for improving and eliminating slip of a sheet of a wet-process diaphragm longitudinal stretcher. The method comprises the following steps: S1, adopting low-tension and stable-speed control at a preheating section; s2, a mode of combining gradient acceleration and sectional type self-adaptive pressing force is adopted in the stretching section, and friction force reduction caused by an oil film is compensated; and S3, speed closed-loop adjustment is adopted in the shaping section, and the deviation between the roller surface speed and the sheet running speed is corrected in real time. Through precise speed matching and tension closed-loop compensation, friction force attenuation caused by an oil film is actively compensated, no relative sliding exists between a roller surface and a sheet in the whole longitudinal stretching process, the problems of sliding, deviation, shaking and the like which troubles the industry for a long time are effectively solved, continuous and stable operation of a wet diaphragm under high-speed and wide-width production can be ensured, and the production efficiency is improved. Meanwhile, power consumption is optimized, and the development direction of intelligent manufacturing and green manufacturing is met; the strict requirements of high-end lithium battery diaphragms on ultra-thinness and high strength can be met, the product quality is high, the productivity is high, and the popularization and application value is huge.

The invention provides a construction method of a geopolymer coating bond-slip constitutive model, and relates to the technical field of concrete bond-slip constitutive research, and the construction method comprises the following steps: carrying out a center pull-out test on a geopolymer coating steel bar pouring concrete test piece to obtain loading end slip, free end slip and bond stress data; calculating the relative slip and the average bonding stress, analyzing the relative slip and the average bonding stress to obtain the relation between the relative slip length and the average bonding stress, and correcting the relation between the relative slip length and the average bonding stress through the geopolymer influence coefficient; the bonding stress data are analyzed, and the relation between the relative anchoring position and the relative bonding stress is obtained; according to the corrected relation between the relative slip length and the average bonding stress and the relation between the relative anchoring position and the relative bonding stress, the geopolymer coating bonding slip constitutive relation is constructed, and the geopolymer coating bonding slip constitutive relation is corrected based on complex network entropy flow logic.

The invention discloses a displacement triggering type expandable anchor rod and a supporting construction method. The displacement triggering type expandable anchor rod comprises an anchor rod body, a friction sliding sleeve, an expansion anchoring mechanism, a conical head and a limiting component. The friction sliding sleeve is coaxially arranged outside the anchor rod body in a sleeving mode, and the friction sliding sleeve and the anchor rod body form a friction matching structure which slides relative to the anchor rod body in the axial direction. The expansion anchoring mechanism is circumferentially arranged at the anchoring end of the anchor rod body, one end of the expansion anchoring mechanism is hinged to the conical head, and the other end of the expansion anchoring mechanism is hinged to the friction sliding sleeve. The limiting component is arranged on the anchor rod body and used for limiting the sliding stroke of the friction sliding sleeve and triggering the expansion action of the expansion anchoring mechanism. Through the staged design of initial stabilization, triggering expansion and sliding energy absorption, the anchoring stability of the rock-soil body during small deformation is guaranteed, the energy absorption requirement during large deformation is met, and the device adapts to the deformation characteristic of the complex rock-soil body; the friction sliding sleeve is driven to move through self deformation of the rock-soil body, and automatic triggering of the expansion anchoring mechanism is achieved in cooperation with triggering positioning of the limiting component.

The invention discloses a steel-concrete combined member with high-strength interface adhesion and a production method thereof, which are applied to the building field, and the steel-concrete combined member is characterized in that a groove structure is formed on the surface of pi-shaped section steel through hot rolling, concrete slurry is filled into a groove during pouring, and after hardening, the concrete slurry and the section steel form mechanical occlusion nested connection, so that relative slippage of the steel-concrete combined member and the section steel is effectively limited; the interface bonding performance and the cooperative stress capacity are remarkably improved, so that the overall bearing capacity of the component is enhanced; the integrated hot-rolled groove structure replaces traditional stud welding, the process is simple, production is facilitated, and the interface bonding effect is better; besides, the adopted composite groove design further increases the steel-concrete contact area on the premise that the process difficulty is not increased, a composite meshing system of linear ribs and point-shaped embedding blocks is formed, the interface bonding force and the mechanical meshing force are synergistically superposed, and the overall stress performance is further improved.

The application discloses an exhaust check structure and a compressor. The exhaust check structure comprises a static vortex disc, a compression cavity, an exhaust groove and an exhaust passage. The exhaust groove is communicated with the compression cavity and the exhaust passage. The exhaust passage is transversely arranged in the static vortex disc and communicated with the side wall of the static vortex disc. A first valve is arranged in the exhaust passage. A positioning passage is arranged in the vertical direction of the static vortex disc and communicated with the exhaust passage. A second valve is arranged in the positioning passage. The second valve is abutted with the first valve to block the exhaust passage. The two valves are cooperated with relative sliding by the motion principle. The stability of the exhaust check structure is improved. The noise problem during the operation of the compressor is effectively solved. Meanwhile, the relative sliding motion mode reduces the violent impact of the valve and enhances the reliability of the exhaust check structure.

This utility model relates to the field of hoisting operation technology and discloses a hoisting pulley structure, including: a pulley body, a connecting bearing, a wheel and axle assembly, and a fixing assembly. The pulley body has a through groove; multiple connecting bearings are spaced apart in the through groove along the axis of the pulley body; the wheel and axle assembly passes through the connecting bearings, and the outer wall of the wheel and axle assembly is in contact with the inner wall of the connecting bearing; the fixing assembly includes: a pressing member and an expanding member. Multiple sets of receiving mechanisms are spaced apart along the axial direction on the side wall of the wheel and axle assembly. Each set of receiving mechanisms includes multiple receiving grooves spaced apart along the circumference of the wheel and axle assembly. The expanding member is disposed in the receiving groove. One end of the wheel and axle assembly has a pressing groove. The pressing member is disposed in the pressing groove and abuts against one end of the expanding member. The other end of the expanding member abuts against the inner wall of the connecting bearing. This utility model effectively prevents the relative slippage between the connecting bearing and the wheel and axle assembly by pushing the expanding member with the pressing member and pressing it against the inner wall of the connecting bearing, thus ensuring the operational stability of the pulley.