229 results about "Radial pressure" patented technology

The invention relates to the technical field of spinning machines, in particular to a spinning machine precision control method suitable for a high-temperature working condition, and the method comprises the following steps: collecting multi-source information; establishing a mapping relation between the thermal error and the temperature field to obtain a thermal error prediction model, training and correcting the thermal error prediction model, and outputting a real-time thermal error prediction value; generating a comprehensive position compensation instruction and performing position compensation; the pressure feedback value collected in real time is compared with a corresponding preset threshold value, if the pressure feedback value collected in real time is larger than or equal to the corresponding preset threshold value, the comprehensive position compensation instruction is converted into a force control instruction, and if the actual axial pressure feedback value or the actual radial pressure feedback value is smaller than the corresponding preset threshold value in the force control process, the comprehensive position compensation instruction is converted into the force control instruction. If yes, returning to the position compensation mode. According to the method provided by the invention, comprehensive compensation and active inhibition of thermally induced errors can be realized, and the forming precision of high-temperature spinning and the surface smoothness of a workpiece are remarkably improved.

The invention relates to the technical field of injection molding pressure control, in particular to a multi-stage pressure closed-loop compensation system and method for high-precision double-color injection molding, and the system comprises an interface gradient positioning module, a flow resistance state recognition module, a fitting function reconstruction module, a time sequence deviation triggering module and a gain reverse correction module. According to the method, the high-density measuring point data is collected, the interface radial pressure gradient change is extracted through the finite difference method, the stably-arranged nodes at the material intersection can be accurately locked, and the flow resistance state of the flow channel is judged according to the slope difference value of the screw speed and the pressure intensity change. A linear boosting or index slow increasing strategy is automatically switched to reconstruct a pressure function form, local high-pressure accumulation characteristics of a product sensitive area are accurately matched, the coincidence degree of a time window drift trend and a slope sudden change window is monitored, historical displacement and pressure errors are converted into backstepping factors through an iterative learning model, and the backstepping factors are calculated. And a driving gain curve is initialized and revised, so that forming deviation caused by thermal drift of equipment is eliminated.

A surrounding rock deformation and failure test system with a rotatable stress main shaft in a three-dimensional crustal stress field is characterized in that a press machine upper pressure head and a press machine base are oppositely distributed up and down, and a loading hydraulic cylinder is connected with the press machine upper pressure head; the surrounding rock sample is vertically arranged in the axial loading space, and a simulation roadway is formed in the axis part of the surrounding rock sample; annular upper and lower end plates are fixedly connected in the upper and lower ends of the confining pressure cylinder respectively; the confining pressure cylinder sleeves the outer side of the axial loading space; a plurality of groups of mounting holes are uniformly formed in the circumferential directions of the annular upper and lower end plates; the radial pressurizing assembly comprises a supporting steel pipe and an elastic capsule. The main supporting section is sleeved with the elastic capsule, and a plurality of through holes are formed in the main supporting section. A plurality of strain bricks are pre-buried in the surrounding rock sample; the track is fixedly mounted in the simulated roadway; the micro camera is assembled on the track through the electric control trolley; and the strain gauge II and the acoustic emission probe are arranged in the simulated roadway. According to the system, the working condition that the direction of a stress field changes can be simulated in a three-dimensional true triaxial stress environment.

The application relates to the technical field of oil product detection, in particular to a full-automatic condensation point tester and a determination method, which comprises a base and a test tube, the top of the base is fixedly connected with a mounting seat, the surface of the base and the mounting seat is provided with a test bath mechanism and a supporting mechanism, the test bath mechanism enables the test tube placed in the test bath mechanism to be adjusted at multiple angles by rotating the test bath driven by a motor, replaces the original manual bolt structure, controls the rotating angle of the motor through a preset program, realizes accurate positioning, avoids the complicated operation of adjusting each hole in the original structure, prevents the angle from deviating during the test by mechanically clamping and locking the rotating shaft, and then the motor and the electric push rod replace manual adjustment, realize double locking effect, can prevent accidental displacement, and improve the accuracy and efficiency; the clamping mechanism enables four arc-shaped clamping plates to exert uniform radial pressure on the outer wall of the test tube through the first spring, the inner diameter of the clamping plate is designed to gradually increase from top to bottom, and different outer diameter test tubes are compatible.

The utility model discloses a pressure-resistant sealing assembly of a bridge plug, and particularly relates to the technical field of bridge plug sealing. The protection part comprises an outer rubber barrel arranged outside the bridge plug in a sleeving mode and two fixing barrels, the two fixing barrels are arranged at the top end and the bottom end of the outer rubber barrel correspondingly, and multiple sets of positioning parts used for enhancing stability are arranged on the sides, close to the outer rubber barrel, of the fixing barrels; each group of positioning pieces comprises a positioning hole, the positioning hole is formed in one side, close to the outer rubber barrel, of the fixing barrel, and a touch plate is rotationally connected into the positioning hole. According to the utility model, the contact plate is rotationally connected with the fixed cylinder, so that when the contact plate and the outer top ring do relative motion, the contact plate drives the pressing plate to be in contact with the outer rubber cylinder, the pressing plate can apply an extrusion force from outside to inside to the outer rubber cylinder, and the outer rubber cylinder can be synchronously subjected to radial pressure and longitudinal pressure by virtue of fixed limiting of the limiting ring seat; therefore, the stability and the sealing performance of the outer rubber sleeve are enhanced.

The invention discloses a motor rotor magnetic shoe surface mounting tool and a surface mounting method thereof and a motor assembly production line, and the tool comprises a rotor housing mold ring, the inner side wall of which is provided with a magnetic shoe supporting structure in a matched manner, so as to form a plurality of magnetic shoe mounting positions for mounting magnetic shoes in the inner circumferential direction of the rotor housing mold ring, the limiting piece of the magnetic shoe supporting structure is arranged between the adjacent magnetic shoe mounting positions; the magnetic shoe auxiliary pressure maintaining device is configured to be detachably mounted in the rotor shell mold ring through a rotating shaft of the rotor shell mold ring; the edge of the magnetic shoe auxiliary pressure-maintaining device is circumferentially provided with a pressure-maintaining assembly corresponding to the installation position of the magnetic shoe, and the pressure-maintaining assembly is used for applying radial pressure to the magnetic shoe, so that the magnetic shoe is tightly attached to the inner side wall of the rotor housing die ring through a bonding layer between the magnetic shoe and the pressure-maintaining assembly. Therefore, the uniform gap between the adjacent magnetic shoes is standardized through the limiting piece and the pressure maintaining assembly, displacement caused by magnetism in the surface mounting process of the magnetic shoes is avoided, the magnetic shoe gap is stably maintained, the consistency of the magnetic shoe gap is guaranteed, and the adjacent magnetic shoes are prevented from being attracted and collided due to magnetism.

The utility model discloses a lens bearing turntable, and relates to the technical field of lens processing. The lens bearing turntable comprises a base and a turntable body, a control motor is arranged in the middle of the interior of the base, a rotating shaft is arranged at the top of the control motor, an electromagnetic chuck is fixedly connected to the top end of the rotating shaft, a magnetic plate is fixedly connected to the lower surface of the turntable body, and a positioning part is arranged in the middle of the lower surface of the turntable body; according to the utility model, the electromagnetic adsorption technology is used for replacing mechanical fixation, so that the disassembly and assembly process is simplified, the maintenance time is obviously shortened, the manual operation intensity is reduced, the labor intensity is reduced, the production efficiency is improved, and the production cost is reduced. And through the adaptive structure of the balls and the annular guide grooves, when the electromagnetic chuck rotates, the balls roll along the guide grooves to form multi-point support, and the radial pressure borne by the rotating shaft is greatly dispersed.

The invention relates to the technical field of laser cutting, in particular to a cutting device for instrument manufacturing, which comprises a mounting frame, a portal frame erected in the middle of the mounting frame and a laser cutting device arranged on the portal frame, and an inner fixing assembly is arranged at one end of the mounting frame; the inner fixing assembly comprises a rotary installation part, a telescopic rod and a plurality of inner supporting strips, the rotary installation part is fixedly installed on the installation frame, the telescopic rod is fixedly connected to the rotary installation part, the telescopic rod is divided into a telescopic section and a fixed section, and the inner supporting strips are annularly and fixedly connected between the telescopic section and the fixed section; an inner supporting assembly is arranged at the front end of the telescopic rod and is in an umbrella shape, and the outer edge of the inner supporting assembly is used for supporting the machined pipe fitting from the interior. Concentrated clamping force is converted into evenly-distributed radial pressure, the problems of indentation, ovalization deformation and the like caused by traditional outer clamping are fundamentally solved, and the clamping device is particularly suitable for machining of thin-wall and precise pipe fittings.

This invention provides a pressure testing device for vanadium redox flow batteries, relating to the field of flow energy storage testing equipment. It employs a push-pull sleeve and a threaded gas delivery pipe, with a compression ring and an expansion sleeve installed between the ends of the sleeve and the pipe. Rotating the push-pull sleeve causes it to move axially along the gas delivery pipe, driving a retaining ring to push the compression ring towards the expansion sleeve. The conical surface of the compression ring penetrates the expansion sleeve, applying radial pressure to cause it to expand outwards and tightly adhere to the inner wall of the tested pipe, forming a sealed structure. This eliminates the need for complex connections such as threads or plugs, achieving rapid sealing through mechanical deformation. A quick-connect fitting connects to a gas source, a control valve regulates the pressure, and a pressure gauge monitors the pressure inside the pipe, enabling sealing tests. Sectional testing can be performed without fully installing the pipeline system, avoiding the need for segmented troubleshooting after a leak and shortening testing time.

The utility model discloses a non-equal-pitch periodic alternating thread connection pair which is composed of a plurality of minimum period connection pair structures. The minimum period connecting pair structure is composed of a standard thread side and a non-equidistant periodic alternating thread side; by means of the thread pitch structure which changes alternately, radial pressure between threads is increased statically, and the anti-loosening capacity of a thread pair is improved. And an energy transfer path is more efficiently interfered under a dynamic load, and energy dispersion and offset are realized, so that a loosening mechanism is more thoroughly blocked.

The utility model provides a conical roller transmission system of an axial and radial ring rolling mill, which relates to the technical field of ring rolling mills and comprises a main body mechanism, a lower conical roller mechanism and an upper conical roller mechanism are arranged in the main body mechanism, the main body mechanism comprises a side block, a mounting plate is arranged at the top end of the side block, and a conical roller is arranged on the mounting plate. Fixing plates are fixedly mounted on the inner walls of the side blocks, the adjusting precision and operation stability of the conical rollers are improved, axial fine adjustment of the lower conical roller is achieved through the linkage design of a hydraulic cylinder A and a threaded rod, and the axial displacement deviation of the conical rollers can be effectively controlled in combination with guide constraint of a limiting rod and a sliding groove; a hydraulic cylinder B is adopted for driving a linkage locking mechanism of a convex block B and a clamping rod to be matched with the buffering design of a soft cushion B, so that uniform application of radial pressure is guaranteed, rigid impact among components is reduced, the disassembly and assembly process of the conical rollers is simplified through sliding fit of a limiting block and a limiting plate and modular design of a baffle and a pull block, and the maintenance difficulty is reduced.

The invention discloses a cable straightening device which comprises at least one straightening unit, and the straightening unit comprises a fixed support used for sleeving and fixing a to-be-straightened area of a cable; the straightening assembly is located in the fixed support and comprises at least one straightening plate, and the straightening plates can abut against the periphery of the cable and apply radial pressure to the cable; one end of the jacking assembly is connected with the straightening plate, and the jacking assembly is used for driving the straightening plate to move in the radial direction so as to press or release the cable. According to the technical scheme, the to-be-straightened area of the cable is sleeved with the fixing support, the jacking assembly is arranged to drive the straightening assembly to press or release the cable, the device aims at modularized and controllable micro-processing of local and slight deformation of the cable, the slight deformation can be straightened quickly and efficiently, and the straightening efficiency is improved. And long-time secondary heating straightening is avoided, and the cable straightening precision and straightening efficiency in the scenes of submarine cable flexible joint manufacturing or engineering field repair and the like are improved.

The application discloses a tunnel full-face surrounding rock deformation testing method and system, and relates to the technical field of geotechnical engineering, and comprises the following steps: driving a force sensor on a pre-constructed annular guide rail to rotate and position a target test point pair, and applying radial pressure to both ends of the force sensor, wherein the force sensor is arranged radially along the annular guide rail, and error compensation learning is further included after the rotation and positioning; collecting deformation data of the target test point pair, and obtaining a deformation modulus of the target test point pair through data analysis; testing each test point pair on the annular guide rail, constructing a deformation modulus distribution field according to a test result, obtaining a deformation modulus spatial distribution map through optimization correction, and determining a supplementary measurement position. The application is used to solve the problems of low efficiency and insufficient self-adaptation of a traditional tunnel surrounding rock deformation modulus testing method.

The application discloses an integrated joint quick buckling connection assembly method and system with improved efficiency, which comprises a support rack, wherein the support rack is a rectangular frame, a linear conveyor is arranged on the support rack, a pair of feeding structures is symmetrically arranged on the two sides of the linear conveyor, and a pair of buckling structures is arranged on the two sides of the linear conveyor and located downstream of the pair of feeding structures; the application relates to the technical field of integrated joint processing, and the integrated joint quick buckling connection assembly system and method can realize accurate matching between pipe clamp supply and workpiece conveying through mechanical hard synchronization, eliminate manual alignment deviation through a double-stage guide mechanism, convert axial thrust into uniform radial pressure through taper surface meshing design, ensure buckling quality consistency, reduce manual intervention through full-process automatic integration, greatly shorten the single-piece operation beat compared with the traditional method, and significantly improve production efficiency and product qualification rate.

The invention provides a supporting device and a supporting device design method.The supporting device comprises a steel arch frame which comprises a plurality of steel arch frame sections, and the steel arch frame sections are sequentially spliced to form an arch frame body; the first buffering part comprises a plurality of first buffering pads and is arranged at the joint of every two adjacent steel arch segments; wherein under the condition that the borne pressure exceeds the yield strength of the first buffer cushion, the first buffer cushion generates annular yielding deformation; the second buffering part comprises at least one second buffering cushion, is arranged on the back face, close to the surrounding rock, of the steel arch, is continuously arranged in the circumferential direction of the steel arch and basically covers the back face of the steel arch; under the condition that the pressure exceeds the yield strength of the second buffer cushion, the second buffer cushion generates radial yielding deformation; and under the condition that the steel arch bears pressure, the second buffer part is configured to generate yielding deformation after the first buffer part, so that graded yielding is realized.

The application relates to the technical field of power engineering cable installation, and discloses an optical and electrical combined cable integrated laying and protection system for complex working conditions, which comprises: a rigid base configured to be anchored at a turning node; and a self-adaptive bearing assembly rotatably installed on the rigid base; the bearing assembly comprises elastic split units arranged in an axial direction; each unit is converted from an open state to a holding state of wrapping the side wall of the cable under radial pressure; and the inner surface of the unit is provided with a partitioned friction structure, which comprises a bottom high-friction rolling driving surface and two side wing low-friction sliding decoupling surfaces; through the cooperation of the tribological anisotropic structure and the self-adaptive geometric deformation, the tangential shear wear in the deep envelope state is eliminated, and the physical damage problem of the cable sheath and the optical unit in high-tension laying is solved.

The invention belongs to the technical field of support and hanger performance testing, and particularly relates to a power pipeline support and hanger performance testing device and method. A test module is rotatably connected in the test ring group, and the test module is used for carrying out multidirectional beating on the test pipeline so as to test the performance of the support hanger body; the test ring group comprises a secondary test ring plate and a main test ring plate; the secondary test ring plate is matched with the main test ring plate in an inserting manner, the secondary test ring plate and the main test ring plate form an annular plate, and the test pipeline penetrates through the annular plate; on the basis that an arc-shaped sliding plate carries a movable testing unit to slide on the surface of an annular plate and is in intermittent contact with an arc-shaped part, intermittent impacting and beating on the periphery of the pipeline are achieved, radial pressure from multiple directions is applied to the pipeline, the radial pressure from the multiple directions borne by the pipeline in a real use scene is simulated, and the testing efficiency is improved. Therefore, the strength performance of the support hanger for fixing the pipeline is verified.

A fastening assembly comprises a spring steel sheet and two bolts, a connecting groove is formed in the outer wall of a connecting pipe, the spring steel sheet is installed in the connecting groove, two fixing holes are formed in the outer wall of the spring steel sheet, threaded holes are formed in the outer walls of the two steel pipe rods respectively, and the threaded holes are connected with the connecting pipe. Two bolts penetrate through the corresponding fixing holes and then are in threaded connection with the corresponding threaded holes. According to the steel pipe pole connecting and fastening device, a spring steel sheet can be additionally arranged in the fastening piece. When the bolt is fastened, the spring steel sheet can generate elastic deformation to apply continuous radial pressure to the steel pipe pole, so that a gap between a steel pipe and the fastening piece can be eliminated, additional clamping force can be provided, and connection is firmer and more reliable.

A tension sensing cable for a cable drive mechanism of a robot, in particular a surgical robot, is provided. The tension sensing cable is configured to respond to an axial tensile force applied thereon, wherein a radial pressure applied on the cable has a lower impact on a voltage output of the cable than the axial force. The cable comprises a main conductive filament and a secondary conductive filament, where the main filament and / or the secondary filament are helically wound and configured such that when the main filament and the secondary filament are in contact with each other, charge transfer occurs between two contact surfaces of the main filament and the secondary filament. When an axial tensile force is applied to the cable, a potential difference generated by the charge transferred between the primary filament and the secondary filament varies, where the variation corresponds to the applied axial tensile force.

The application discloses a water jet pressure distribution measuring device, a water jet processing prediction method and device. The prediction method comprises the following steps: calculating a water jet radial pressure distribution parameter; constructing a fitting function; determining a water jet pressure parameter of a unit area of a surface to be processed; and calculating a deformation amount of the unit area after current water jet processing. The application can construct a fitting function based on water jet radial pressure distribution information measured by the measuring device, and predict water jet contact pressure at any position in the radial direction of the surface to be processed under different jetting heights and different jetting pressures. Based on the fitting function, the water jet processing process can be discretized into multiple sequential fixed-point jetting processes, the pressure change of the unit area of the surface to be processed in the water jet processing process can be predicted, and the deformation amount of the unit area after water jet processing can be predicted, which helps to improve the precision of water jet processing.

The application discloses a spinning processing method for a spear body, which comprises the following steps: S1, positioning and supporting a pipe between two pipe end positioning sleeves and clamping the pipe by using a pipe rotating mechanism; S2, driving the pipe to rotate uniformly; S3, clamping the pipe from the radial outside of the pipe by using a centering mechanism to limit the radial deviation of the pipe in the subsequent processing process and keeping the centering state; and S4, spinning forming, which comprises the following steps: S4.1, radial feeding, making two groups of spinning rollers on two spinning units contact the outer wall of the rotating pipe in a left-right opposite state and applying radial pressure; and S4.2, axial feeding and synchronous spinning, driving the centering mechanism and each spinning unit to move in the direction parallel to the pipe axis under the condition that the spinning rollers contact the outer wall of the pipe, so that the pipe is processed and formed. The application has the advantages that the uniformity of the circumferential wall thickness of the spear body can be improved.

The invention discloses a wet forming device for increasing the density of an activated carbon filter element and a production method. The wet forming device comprises a mounting main body, an adsorption channel and a negative pressure adsorption mechanism, the central pipe is provided with a plurality of drainage holes distributed in the length direction of the central pipe; the soft sleeve is arranged outside the central pipe in a sleeving manner; the lower end cover and / or the upper end cover can reciprocate along an internal channel of the soft sleeve, and a forming space is defined by the lower end cover, the upper end cover, the soft sleeve and the central pipe; an axial pressure mechanism and a radial pressure mechanism; the production method comprises the steps that the framework cylinder is arranged on the central pipe in a sleeving mode, water-containing filter element slurry is put into the forming space, water in the filter element slurry is extruded out in the axial direction and the radial direction under the combined action of the axial pressure mechanism and the radial pressure mechanism, and the extruded water is sucked away by the negative pressure adsorption mechanism through the drainage hole; dehydrated filter element slurry is stably attached to the framework cylinder, the density of the activated carbon filter element is increased, and the problem that the filter element slurry falls off due to a rolling forming mode is solved.

The utility model discloses a rapid clamping and assembling device for a camshaft signal wheel, relates to the technical field of camshaft signal wheel assembling, and aims at solving the problems that a traditional interference fit press-fitting or welding process is complex in operation, parts are prone to being damaged, and repeated disassembly and assembly cannot be achieved, and rapid clamping is achieved through a split type clamping wheel and multi-bolt cooperative locking structure. The device comprises a hinged type semicircular clamping wheel arranged at the end of a cam shaft in a sleeving mode, the outer side of the clamping wheel extends to the annular face of a signal wheel through a connecting arm, a T-shaped locking bolt is arranged at the tail end of the connecting arm to abut against the signal wheel in the radial direction, the two ends of the clamping wheel are pulled and tightly hold the cam shaft through butterfly bolts, and elastic extrusion bolts are arranged in the side wall to compensate axial gaps. Axial-radial combined clamping is formed; the T-shaped bolt anti-falling design is combined with the single-hand opening and closing characteristic of the rotating shaft hinge.

The invention discloses a device for pneumatically installing a magnetic pole key of a water-turbine generator set and a using method, and relates to the technical field of water-turbine generator set maintenance. The device comprises an air compressor, an air storage tank, a high-pressure hose and a keystroke device which are sequentially connected, an air distribution part in the keystroke device is connected with the high-pressure hose through an air inlet, the output end is connected with an impact part, the bottom end of the impact part is connected with a keystroke head, and a return spring is connected between the keystroke head and a shell; the air storage tank is connected with the air compressor through the air delivery pipe, and the air supply pipe is connected with the high-pressure hose and provided with an air adjusting switch. The using method comprises the steps of calculating the minimum radial pressure, deducing the tightening force, matching the output force of the key hitting device, and tightening the magnetic pole key through the pneumatic device. Manual knocking is replaced by pneumatic driving, accurate tightening force is ensured in combination with scientific calculation, potential safety hazards of a traditional process are eliminated, operation efficiency and precision are improved, and the device is suitable for installation and maintenance of the magnetic pole key of the water-turbine generator set.

The utility model relates to the technical field of PE pipes, in particular to a high-strength compression-resistant PE pipe which comprises a pipe body made of PE materials, a protective layer wrapping the outer side of the pipe body, a buffer layer arranged between the pipe body and the protective layer and a supporting layer arranged on the outer wall of the pipe body. The supporting layer comprises supporting rings distributed in a spiral mode, by designing the spiral distribution design of the supporting rings with the I-shaped sections, the problem of circumferential stress concentration of a traditional PE pipe is effectively solved, mechanical complementation is formed between flanges of an I-shaped structure and a web, the contact area between the flanges and the inner wall and the outer wall of the pipe body is enlarged, and uniform load transmission is achieved. The web plates vertically support the radial pressure of the pipe body, the circumferential compressive rigidity of the pipeline is remarkably improved, pipe wall collapse caused by local stress concentration can be avoided, and the structural integrity of the pipeline under long-term pressure is guaranteed.

This utility model discloses a riveting structure for wires and terminals and the riveting mold used therein. At least one radially protruding rib is formed on the inner wall of the wire insertion hole at one end of the terminal. The exposed wire at one end of the wire can be inserted into the wire insertion hole. After the terminal is deformed by radial pressure, the rib on the inner wall of the wire insertion hole can be squeezed into the wire. The wire can be tightly clamped in the space after the wire insertion hole is deformed by pressure. The riveting mold includes an upper mold and a lower mold. The upper mold pressing block of the upper mold can be raised and lowered by a set distance and installed below the upper mold mounting base, providing a downward elastic force to the upper mold pressing block of the upper spring. The lower mold support block of the lower mold can be raised and lowered by a set distance and installed above the lower mold mounting base, and the lower spring provides an upward elastic force to the lower mold support block. The upper riveting joint and the lower riveting joint fixedly installed on the upper mold mounting base and the lower mold mounting base can respectively extend into the upper receiving groove and the lower receiving groove of the upper mold pressing block and the lower receiving groove of the lower mold support block to compress the terminal. This utility model makes the connection between the wire and the terminal firm.

The invention relates to the technical field of ice cream food production, and discloses a raw material odor adsorption device for ice cream food production, which comprises a fixing assembly, the fixing assembly comprises a mounting plate, and the bottom of the mounting plate is fixedly connected with a limiting plate. Sealing fixing blocks are slidably mounted in the mounting plate and the limiting plate through guide grooves, operating handles are fixedly connected to the outer surfaces of the sealing fixing blocks, and embedded grooves are formed in the centers of the interiors of the mounting plate and the limiting plate. The operation handle is held to drive the sliding structures of the sealing fixing blocks between the mounting plate and the limiting plate to operate, the synchronous displacement effect of the multiple sets of sealing fixing blocks is driven, rigid linkage between the sealing blocks is achieved through the connecting frame, and a stable clamping system in a three-dimensional space is formed in combination with constraint of the guide block on the movement track of the limiting plate; the radial pressure distribution generated by the synergistic effect of the multiple sealing fixing blocks ensures the sealing reliability and avoids deformation damage caused by local stress concentration.

The utility model discloses low-temperature and high-pressure hydrogen storage and filling equipment, and relates to the technical field of hydrogen storage and filling equipment. The device comprises a storage tank, a sealing assembly and a leakage active detection assembly, the top of the storage tank is communicated with a conveying pipe, a control valve is installed on the surface of the conveying pipe, and the sealing assembly comprises a metal hose. Through the sealing assembly, the metal hose is connected with the conveying pipe, the top of the conveying pipe is covered with the sealing cover to form a first sealing barrier, an electric cylinder in the secondary sealing mechanism drives a bracket to move upwards, and an extrusion ring is forced to apply radial pressure to the slope surface of a conical sealing rubber ring; and the screw rods on the two sides of the fixing plate are matched to be screwed into the fixing sleeve to achieve mechanical locking, the synergistic effect of multiple layers of sealing structures is achieved, the sealing reliability of the connecting part under the extremely low-temperature and high-pressure environment is remarkably improved, and hydrogen leakage caused by material shrinkage difference is prevented.

The application discloses a straightening device for seamless steel pipe machining and particularly relates to the technical field of seamless steel pipe machining, which comprises a base, a scraping piece for cleaning the seamless steel pipe is arranged at the front end of the base, a straightening piece for machining the seamless steel pipe is arranged at the rear side of the scraping piece, the straightening piece comprises two supporting seats arranged at the top of the base, a driving motor is arranged on the base, a driving shaft of the driving motor is provided with a driving gear, a fixed ring is arranged on the driving shaft, a plurality of pinion gears are arranged on the fixed ring, a plurality of toothed rings are arranged on the pinion gears, a plurality of supporting tubes are arranged on the toothed rings, a plurality of straightening rollers are arranged on the supporting tubes, a plurality of adjusting seats are arranged on the straightening rollers, and a plurality of shaping pieces are arranged on the adjusting seats. The application drives the fixed ring and the toothed rings on the fixed ring to rotate through the meshing of the pinion gears and the gear, drives the plurality of pinion gears to rotate synchronously through the meshing of the toothed rings, drives the adjusting seats and the straightening rollers on the shaping pieces to move towards the center, realizes the effect of limiting seamless steel pipes of different specifications in multiple directions, drives the supporting tubes and the plurality of straightening rollers to rotate through the meshing of the second gear and the first gear, and the straightening rollers apply uniform and continuous radial pressure and multidirectional bending stress to the seamless steel pipe, so that the straightness and the roundness of the seamless steel pipe are corrected, and the practicability of the product is improved.

The invention relates to the technical field of geotechnical engineering tests in cold regions, in particular to a test mold provided with a handle and a hose clamp and used for rapid sampling in a freeze-thaw cycle experiment and a rapid disassembly and assembly method. The test mold comprises at least three layers of cylindrical barrels, a bottom plate and a top cover which are arranged in a segmented mode in the height direction, and each layer of cylindrical barrel is 200 mm high, 200 mm in inner diameter and 8 mm in wall thickness and is made of low-temperature-resistant PMMA. Adjacent cylindrical barrels are connected through 304 stainless steel handle hose clamps, corrosion resistance is high, low-temperature corrosion is avoided, enough radial pressure can be generated by rotating the handle with hands, operation is easy, convenient and rapid, the test preparation period is greatly shortened, labor intensity is reduced, and test efficiency is improved. Meanwhile, the-60 DEG C low-temperature-resistant fluorosilicone rubber O-ring embedded in the annular clamping groove has the compression ratio of 30% and good elasticity at a low temperature, and is matched with a hose clamp to realize zero leakage between freezing and thawing cycles at-30 DEG C to + 20 DEG C, airtightness inspection reaches the standard, and the accuracy and reliability of a test result are guaranteed.