462results about How to "Reduce stress concentration" patented technology

The application discloses a coal rock anti-burst method of large-range seam forming by remote controllable shock wave and hydraulic fracturing, and comprises the following steps: step one, detecting and recording the stress concentration degree of target coal seam or rock stratum; step two, drilling; step three, withdrawing the hollow drill rod, arranging the discharge electrode connected with the cable at the front end of the hollow drill rod, and sending the discharge electrode into the drill hole through the hollow drill rod; step four, sealing the hole by using a hole sealer and performing hydraulic fracturing; steps five to seven, completing multiple repeated electric pulse discharge operations; and step eight, testing the pressure relief effect of the coal seam or rock stratum. The method uses the drilling cuttings method, high-pressure hydraulic fracturing and high-voltage electric pulse to perform large-range cracking and pressure relief on the coal rock stratum, changes the stress state of the coal rock stratum, and reduces the stress concentration degree, so that the anti-burst purpose is achieved. The method is mainly applied to deep coal rock body tunneling roadways and coal mining working faces containing coal rock body impact tendency.

The invention relates to the technical field of polymer compositions, and discloses a fiber microcrack self-healing composition with a shape memory characteristic, which comprises modified polyester containing thermally reversible dynamic covalent bonds and an asymmetric polyether-polyester block copolymer interface regulator, the melt index ratio of the interface regulating agent to the modified polyester is 1.8-3.2, and the interface regulating agent is distributed on the periphery of the modified polyester to form a core-shell microdomain. By utilizing the rheological gradient among the components, the interface regulating agent forms a low-viscosity flowing layer when the matrix shrinks; and the modified polyester is restrained to directionally migrate towards the tip of the fiber microcrack, so that active closing and densification filling of the crack area are realized, micro holes in the repaired area are eliminated, and the mechanical continuity of the composition in a dynamic environment is kept.

The utility model discloses a detachable supporting assembly for a giant circular ring. The detachable supporting assembly comprises a lining plate, a first supporting rod, a second supporting rod and an adapter plate. The plurality of lining plates are uniformly arranged in a circle along the inner wall of the ring and are fixed with the inner wall of the ring by spot welding, the adapter plate is located at the center of the ring, the length of the two first support rods is slightly smaller than the diameter of the ring, two ends are connected with the lining plates through bolts, and the middle is connected with the adapter plate through bolts; the second inner supporting rods are arranged in the radial direction, the outer ends of the second inner supporting rods are connected with the inner lining plate through bolts, and the inner ends of the second inner supporting rods are connected with the adapter plate through bolts. The inner supporting assembly is simple in structure and convenient to construct, on the premise that stable supporting is guaranteed, mounting and dismounting difficulty is lowered, mounting time is shortened, labor cost is saved, meanwhile, welding workload is reduced, worker fatigue and welding quality reduction caused by long-time welding are avoided, the inner supporting assembly can be positioned and corrected through bolts, and the production efficiency is improved. Compared with an all-welded structure, stress concentration can be effectively reduced.

This utility model relates to the field of tower wall repair equipment, specifically to a tower wall plug fixing device, including a first fixing plate and a second fixing plate. The ends of the first fixing plate and the second fixing plate are wrapped around the tower wall by fixing members. A repair plug is provided on the tower wall, and the repair plug is installed in the first fixing plate or the second fixing plate. Support members are provided at the bottom of both the first fixing plate and the second fixing plate. This utility model, through the cooperation of the first fixing plate, the second fixing plate and the fixing members, can be quickly installed around the tower wall without welding, significantly improving construction efficiency and reducing safety risks.

The application relates to the technical field of cables, and discloses an insulated high-temperature superconducting cable and a preparation method thereof. The insulated high-temperature superconducting cable comprises, from inside to outside, a lining core, a superconducting conductor, an insulation layer, a shielding layer, a heat insulation pipe and a sheath layer. The raw material of the sheath layer comprises the following components in parts by weight: 100 parts of polyvinyl chloride, 10 to 15 parts of ethylene-vinyl acetate copolymer, 4 to 6 parts of silicone rubber, 20 to 30 parts of composite filler, 5 to 8 parts of compatilizer, 2 to 5 parts of stabilizer and 6 to 10 parts of plasticizer. The raw material of the composite filler comprises the following components in parts by weight: 40 parts of palygorskite powder, 2 to 5 parts of chitosan and 4 to 8 parts of vinyl chloride-methyl methacrylate copolymer. The palygorskite powder, the chitosan and the vinyl chloride-methyl methacrylate copolymer are compounded to form the composite filler, and the composite filler is added into the cable sheath layer, so that the mechanical properties of the cable sheath layer can be effectively improved.

The application discloses a gradient water-permeable type flow guide belt with surface algae resistance and lower layer drag reduction, which comprises a floating body assembly, an upper algae resistance skirt curtain connected below the floating body assembly, a lower gradient water-permeable net body connected below the upper algae resistance skirt curtain, and a segmented counterweight chain connected below the lower gradient water-permeable net body. Tensioned cables are distributed on the floating body assembly at intervals, the lower ends of the tensioned cables are connected with the segmented counterweight chain, anchor assemblies are arranged on the segmented counterweight chain at least near both ends of the segmented counterweight chain, and the lower gradient water-permeable net body comprises at least two water-permeable net layers arranged in sequence along the depth direction, and the porosity of each water-permeable net layer increases from top to bottom. The gradient water-permeable type flow guide belt has the advantages that the partition structure of upper algae resistance and lower water permeability can significantly reduce the water resistance area of the middle and lower layers while maintaining the surface algae resistance and flow guiding capacity; and the structure design of the gradient water-permeable net body with the porosity increasing from top to bottom can make the water power transition more gentle and reduce the stress concentration of the single net body or the whole skirt curtain.

This invention belongs to the field of clamping fixture technology, specifically a clamping fixture for casting production and processing and its operating method. The clamping fixture includes a crossbeam, with a hydraulic cylinder fixedly connected to the top of the crossbeam and a set of hangers fixedly connected to the bottom of the crossbeam. Each set of hangers has a set of crossbars fixedly connected to it, and each set of crossbars is slidably connected to a limiting seat. A movable seat is fixedly connected to the bottom of each of the two limiting seats, and a mounting arm is fixedly connected to the bottom of each of the two movable seats. Mounting plates are fixedly connected to the bottom of opposite sides of each of the two mounting arms. Floating chucks are provided on the mounting plates, and support components are provided on each of the two mounting arms. This invention, by setting multiple sets of floating chucks on the mounting plates on both sides, can tightly fit the outer walls of both sides of the cylinder head, better clamping and fixing the cylinder head. By setting the support components, after the floating chucks clamp the cylinder head, they can support the cylinder head from below, reducing the working pressure of the floating chucks and preventing excessive clamping force from damaging the cylinder head surface.

The utility model discloses a kind of light-weight motor mounting bracket, it is related to motor bracket production appliance technical field, including installation base, installation base top one end is welded with mounting plate, mounting plate bottom side is welded with the reinforcing rib for strengthening fixed, reinforcing rib bottom is welded on installation base, mounting plate top is fixedly connected with connecting block, connecting block is opened with the fixed hole for connecting external equipment, mounting plate is opened with the heat dissipation hole for ventilation, the utility model is set through connecting block, can ensure the reliable connection of bracket and external equipment, optimize the transmission path of force, reduce stress concentration;Through the setting of expansion bolt, the quick, accurate installation of bracket can be realized, the firmness of guarantee installation;Through the setting of reinforcing rib, it can be ensured that the connecting part of mounting plate and installation base does not crack or deform when motor high-speed operation or load changes, solve the structural damage problem caused by insufficient strength of connecting part of traditional bracket.

The utility model relates to the technical field of positioning jigs, in particular to a positioning jig for assembling an LED (light-emitting diode) lamp panel, which comprises a base, a placing groove, a circular groove, a lamp panel main body, a movable component and a connecting pipe, the containing groove and the circular grooves are formed in the bottom of the base, the circular grooves are distributed in the four corners of the containing groove, the movable assemblies are arranged in the circular grooves and are in diagonal design, the lamp panel body is located at the tops of the movable assemblies, and the connecting pipes are vertically installed in the base and are symmetrically distributed along the central axis of the base. The movable assembly comprises a movable groove, a movable column, a connecting block, a movable column and a guide column. The movable groove is formed in the circular groove, the movable column is perpendicularly located in the movable groove, and the connecting block is fixed to the top of the movable column. The LED lamp panel taking-out device has the advantages of being simple in structure, reasonable in design and capable of taking out the LED lamp panel from the positioning jig stably and simply.

The utility model belongs to bridge building technical field discloses a kind of bridge high bearing capacity node optimization structure, including H-shaped steel, H-shaped steel is connected with link steel by reinforcing bolt and reinforcing nut, first hinged seat is equipped on link steel, transverse I-beam is installed on link steel, second hinged seat is equipped on transverse I-beam;Link member is connected between first hinged seat and second hinged seat, link member includes core energy consumption section, transition section and elastic connecting section, first hinged seat, second hinged seat and link member form triangular force transmission mechanism, core energy consumption section is equal cross section steel plate, two end elastic connecting sections are connected with first hinged seat and second hinged seat, top angle angle of triangular force transmission mechanism is 45 °-60 °, and the axis of first hinged seat and H-shaped steel web center line present 10 °-15 ° angle of inclusion.The utility model not only can realize the multidirectional transmission of node area force, but also can avoid the stiffness mutation problem caused by traditional welding, and can inhibit the expansion of microcrack.

This application discloses a cell assembly and a battery pack. The cell assembly includes: an end plate, multiple cells, an insulating base, and an output electrode. The multiple cells are arranged between the end plates along a first direction. The output electrode is located at one end of the end plate along a second direction and is electrically connected to the cells adjacent to the end plate. The insulating base includes a support portion and an insulating portion. One end of the support portion is connected to the end plate, and the other end is connected to the end of the output electrode away from the cell. The insulating portion is located between the cell and the output electrode along the second direction, with one end connected to the support portion and the other end extending towards the cell along the first direction. The projection of the insulating portion along the second direction at least partially falls within the cell. Thus, compared with related technologies, this application eliminates the need for openings on the end plate to reduce its height. Instead, it increases the length of the insulating portion in the first direction to increase the creepage distance. This allows the end plate to have a complete end face that abuts against the cell, thereby ensuring the uniformity of the preload force on the cell and improving the stability of the cell assembly.

This utility model discloses an integrated transition yaw connection system for wind turbines, belonging to the technical field of wind power generation equipment. The system includes a wind turbine tower, a slewing bearing, a short-section cylinder, and a lower platform. The wind turbine tower has a truss-type hollow structure. The short-section cylinder is vertically arranged and its top is welded to the lower platform as a whole. Its bottom is connected to the top of the tower through the slewing bearing. This utility model uses a hierarchical structure of truss tower-slewing bearing-short-section cylinder-platform. It utilizes the short-section cylinder to distribute the nacelle load and compensate for installation errors. Combined with the slewing bearing, it achieves low-friction and stable yaw. This structure effectively solves the problems of heavy self-weight, obvious yaw vibration, complex assembly, and easy wear of connection parts of traditional wind turbine towers. It has the advantages of lightweight, stable yaw, convenient installation, and long service life.

The application relates to the technical field of compression performance testing, in particular to a regenerated polyester fiber roadbed reinforcing material compression performance testing device and method thereof through sensor monitoring, which comprises a supporting plate, a support fixed on the supporting plate, and a top plate arranged at the top of the support; a pressure tank fixed on the supporting plate is used for bearing water, a rubber pipe is arranged in the pressure tank, and pressure regulating pipes are symmetrically arranged on the side wall of the pressure tank; a pressure regulating mechanism is arranged in the pressure regulating pipe, a piston disc in sliding sealing connection with the pressure regulating pipe is connected to the pressure regulating mechanism, a follow-up balance mechanism is arranged on the pressure regulating mechanism, when a sample arranged in the rubber pipe is compressed and the side edge of the sample is deformed, water enters the pressure regulating pipe and pushes the piston disc, under the action of the pressure regulating mechanism and the follow-up balance mechanism, the support force borne by the piston disc can be kept within a certain range at all times, so that the accuracy of the compression performance test is ensured.

The utility model discloses a cable, which belongs to the field of cables and comprises a core wire, a middle coating layer, a first shielding layer, a second shielding layer and a ground wire, the middle coating layer is coated outside the core wire, the first shielding layer is coated outside the middle coating layer, the second shielding layer is coated outside the first shielding layer, and the ground wire is positioned between the middle coating layer and the first shielding layer. According to the cable provided by the utility model, through the combined action of multiple layers of structures, the middle coating layer, the first shielding layer and the second shielding layer can be dispersed to each layer when bearing external bending stress, so that the stress concentration of the core wire is reduced, the probability of deformation of the core wire due to repeated bending is reduced, the characteristic impedance stability is maintained, the signal transmission is ensured, and the data transmission abnormity is reduced.

The invention discloses an assembly type shear wall bolt connection box with a stress gradient transition function, and belongs to the technical field of assembly type reinforced concrete structure connection. The connecting box comprises a steel box body, an anchoring back plate arranged on the back face of the box body and array type anchoring ribs arranged on the anchoring back plate. The metal outer wall of the connecting box is coated with a buffer layer formed by a high-strength rubber elastomer or epoxy resin mortar, and the thickness of the buffer layer is gradually reduced in the anchoring direction, so that rigidity gradient transition from the steel box to the concrete is achieved. The structure can effectively weaken stress concentration near the end of the anchor bar, delays cracking and crushing of concrete on the edge of the connecting box, remarkably improves ductility and crack resistance of the vertical abutted seam joint of the fabricated shear wall, and better achieves the design goals of strong connection and weak components.

The invention relates to the technical field of photovoltaic cells, in particular to a photovoltaic module. The photovoltaic module comprises a glass cover plate, the glass cover plate comprises a glass body, the glass body is provided with a first surface and a second surface which are oppositely arranged in the thickness direction of the glass cover plate, and the first surface is the face away from the battery pack. The first surface is provided with a plurality of uniformly distributed concave parts, and a gap is formed between the concave part at the edge position and the edge of the glass body. The depth D1 of the recessed portion satisfies 10 [mu] m < = D1 < = 30 [mu] m. And the distance D3 between the concave part at the edge position and the edge of the glass body is greater than or equal to 2mm and less than or equal to 6.5 mm. According to the invention, the first surface is provided with the recessed part, and under the condition that the thickness and weight of the glass cover plate are not increased, the structural strength of the glass cover plate is enhanced, and the stress is dispersed, so that the impact resistance of the glass cover plate is improved, the risk that the glass cover plate is cracked or broken due to impact is reduced, and the service life of the glass cover plate and the photovoltaic module is prolonged.

This utility model discloses a multi-axis automatic positioning mechanism for an electro-hydraulic bending machine, belonging to the technical field of bending machines. The multi-axis automatic positioning mechanism for an electro-hydraulic bending machine includes a base, a limiting mechanism on the base for positioning the sheet metal, a fixed seat fixed to the top of the base, two bearing seats mounted on the fixed seat, a drive shaft rotatably connected between the two bearing seats, two connecting seats fixed to the outside of the drive shaft, a flipping plate fixed to the connecting seats, a rubber pad connected to the top of the flipping plate, a drive mechanism on the fixed seat for driving the drive shaft to rotate, and a buffer assembly on the base. This utility model solves the problem that existing automatic positioning mechanisms for bending machines cannot dynamically support the sheet metal. By setting a flipping support structure, this utility model provides real-time support to the bottom of the sheet metal during bending, effectively preventing sagging, displacement, or deformation of the sheet metal due to its own weight or uneven force.

The application discloses a preparation method of a large-bore air-cooled diesel engine piston and specifically comprises the following steps: S1, modeling and dividing regions; S2, gradient printing; and S3, coating addition; and relates to the technical field of diesel engine pistons. The preparation method of the large-bore air-cooled diesel engine piston realizes the synergistic optimization of the overall performance of the piston through gradient printing of the piston, realizes the lightweight of the piston in cooperation with the honeycomb lattice structure, reduces the abrasion amount by using silicon carbide, improves the wear resistance of the top region, forms zirconium tri-aluminum nano precipitated phases by zirconium, refines the grains, forms a composite precipitated phase by using scandium, zirconium and aluminum, improves the high-temperature strength, constructs an efficient heat conduction network by using graphene nanosheets, improves the heat conductivity of the middle region, forms a three-dimensional network by using carbon nanotubes, improves the toughness of the skirt region, and has high interfacial bonding strength by spraying a wear-resistant and corrosion-resistant coating on the surface of the piston, reduces the friction, improves the service life of the piston and effectively reduces the maintenance cost.

The utility model discloses a battery module material rack which comprises a second supporting pad, the upper end of the second supporting pad is fixedly connected with a lower longitudinal fixing rod, one end of the lower longitudinal fixing rod is fixedly connected with a lower transverse fixing rod, a supporting assembly is arranged on the lower longitudinal fixing rod and the lower transverse fixing rod, a stress assembly is arranged on the supporting assembly, and the stress assembly is fixedly connected with the second supporting pad. The weight of the battery module is uniformly dispersed to the stress component through the grid supporting structure, so that safe stacking is realized; the height difference design of the supporting pad and the clamping plate ensures that the fork arm of the forklift can be smoothly embedded, and the carrying stability is improved; according to the sliding opening and closing system, the material frame can be rapidly stored and taken without disassembling the storage and transportation box, firstly, the material frame bears the battery modules through the grid supporting layer, then fork arms of a forklift are embedded into clamping plates to achieve stable carrying, at the moment, sliding doors of the storage and transportation box are closed to form a sealed space, and sliding limiting plates are opened to facilitate rapid material taking; the problems that traditional storage and transportation equipment is difficult to stack, unstable in carrying and tedious in operation are solved.

The utility model relates to a hollow plate hot mark pressing device which is suitable for the field of hollow plate processing. The device comprises a support, two hot-pressing rollers rotating relatively are arranged on the support, a plurality of protruding annular hot-pressing teeth are evenly distributed on the hot-pressing rollers in the radial direction, a hot-pressing mark channel is formed, a motor drives a chain to conduct transmission, continuous machining of the hollow plate is achieved, and efficiency is improved. The hot-pressing roller is hollow to form a heat-conducting oil cavity, the hollow rotating shaft serves as an oil inlet and outlet channel, heat-conducting oil is circularly heated under the action of the conveying pump, the temperature is maintained at 180-220 DEG C, and it is ensured that the indentation quality is stable. A protective shell is arranged at the top of the device, and a feeding port and a discharging port are provided with height-adjustable L-shaped pressing plates, so that the device is suitable for plates with different thicknesses. According to the device, by optimizing the structural design, efficient and accurate hot-pressing mark machining is achieved, the machining quality of the hollow plate is remarkably improved, the service life of the hollow plate is remarkably prolonged, the production cost is reduced, and good market application prospects are achieved.

This utility model relates to the technical field of rail vehicle components and discloses a uniformly stressed rubber stack for rail vehicles, including a support base. A central metal sphere is fixedly installed inside the support base. A first rubber layer is fixedly installed on the outer side of the central metal sphere. A first supporting sphere is fixedly installed on the outer side of the first rubber layer. A second rubber layer is fixedly installed on the outer side of the first supporting sphere. A second supporting sphere is fixedly installed on the outer side of the second rubber layer. This uniformly stressed rubber stack for rail vehicles has a cylindrical support plate with a first and second inclined surface, reducing stress concentration. Through a multi-layer metal reinforcement structure design, local stress concentration is reduced, dynamic load transfer efficiency is improved, and the longitudinal and lateral stiffness of the rubber stack is increased, resulting in uniform stress distribution, extended service life, longer replacement cycles, lower failure rates, and reduced maintenance costs.

The utility model relates to abrasive disc technical field discloses a kind of high-strength brown corundum wear-resistant resin abrasive disc, including wheel core, the transition layer is equipped outside wheel core, the abrasive ring is equipped outside transition layer, and the transition layer and abrasive ring are detachably connected by bolt;Several convex teeth are distributed in the surface one side of transition layer, several grooves are opened in abrasive ring inner wall, and several convex teeth are embedded in the inner wall of several grooves;The utility model is connected by the circumferential limit of convex tooth and groove, annular limiting plate and annular groove and the axial restriction of mounting block and mounting groove, plus the fastening effect of bolt, multiple structure cooperation makes transition layer and abrasive ring connect exceptionally stable, when abrasive ring wears, it can be replaced by only disassembling bolt, wheel core and transition layer can be reused, without integral replacement abrasive disc, substantially reduce the equipment use cost, reduce resource waste, and it is convenient to replace abrasive ring of different granularity according to processing requirement.

This utility model relates to the field of wall connection technology and discloses an efficient connection device between a BRB (Brick Reinforced Bench) and a secondary structure wall. It includes a channel steel 2C10 and an upper wall of the BRB. A steel frame beam is fixedly connected to the top of the channel steel 2C10, and an embedded part is fixedly connected to the bottom of the channel steel 2C10. A first connecting ear plate is provided on the outer side of the channel steel 2C10, and a tie bar is fixedly connected to the outer side of the first connecting ear plate. Polyurethane foam is provided at the bottom of the upper wall of the BRB. In this utility model, the double-layered channel steel and the tie bar on the connecting ear plate can disperse localized concentrated loads in the wall, effectively transferring these loads to the main structure, reducing stress concentration in the wall. Under seismic action, the tie bar forms an energy dissipation mechanism, helping to dissipate seismic energy and reducing damage to the building wall. The tie bar can also restrain the development of temperature shrinkage cracks, ensuring the durability and safety of the wall, and has significant market and social value.

The utility model discloses a printing carrier plate and a photovoltaic cell, and belongs to the technical field of photovoltaic cells. The printing support plate comprises a support plate body and a film layer arranged on the surface of at least one side of the support plate body, and the film layer comprises at least one of a metal film layer and a polymer film layer; the printing carrier plate further comprises a groove array, and the groove array penetrates through the film layer and extends to the carrier plate body in the thickness direction of the printing carrier plate. According to the utility model, the quality of groove laser etching can be improved.

The utility model discloses a ring main unit temperature measurement plug, which belongs to the technical field of temperature measurement plugs, and comprises a base and a circuit board, the outer side wall of the base is provided with a shell, one side of the base is provided with a rectangular groove, the other side of the base is provided with an overheat protection assembly, and one end of the shell far away from the base is provided with a metal connecting piece. An electromagnetic induction assembly is arranged at the end, located in the shell, of the metal connecting piece, and the circuit board is arranged in the overheating protection assembly. According to the utility model, the electromagnetic induction assembly is arranged, the cylindrical electrode plate, the metal connecting piece and the epoxy resin form a suspension capacitor, an alternating electric field is utilized to supply power to the circuit board and the energy storage capacitor bank, passive work is realized, stress concentration of the cylindrical electrode plate is reduced through the round hole, and the overheating protection assembly is arranged to protect the electromagnetic induction assembly. When the detected temperature is greater than or equal to 80 DEG C, the circuit board electrifies the miniature electromagnet, the mounting ring is attracted to compress the reset spring, the circuit board is driven to be separated from the heat conduction copper sheet, and a heat conduction path is blocked.

This invention discloses a SiC with an ultra-high temperature ceramic gradient coating. f / SiC composite materials, their preparation methods, and applications. A double-layer glow discharge plasma surface metallurgical method is used to prepare SiC composite materials. f A (Hf,Si,Ta)C gradient composite coating was prepared on the surface of the SiC composite material. This coating was able to resist SiC in an oxygen atmosphere at 1773 K. f Effective protection of SiC composite materials. The specific advantages of this invention are: (1) Ion bombardment of the substrate significantly improves the point defects and conductivity of the composite substrate; (2) The (Hf,Si,Ta)C coating has a continuous gradient structure, forming a good metallurgical bond between the coating and the substrate, with high bonding strength; (3) The similar thermal expansion coefficients of the (Hf,Si,Ta)C coating and the substrate can improve the thermal mismatch between the coating and the substrate, reducing the tendency for coating peeling and cracking during service; (4) The (Hf,Si,Ta)C coating system has a high service temperature and self-healing ability. The coating prepared by this invention has excellent high-temperature protection performance, improving the protection of SiC. f The high-temperature service life of SiC composite materials has broad application prospects in the aerospace field.

The utility model discloses a kind of liquid-cooled battery box and battery pack, it is related to energy storage technical field, liquid-cooled battery box includes bearing frame, bearing frame includes multiple edge beams and connecting block, multiple edge beams are sequentially connected to frame shape, the inside of at least one edge beam is provided with connecting block, bearing frame is used to be connected with external transfer equipment through connecting block;At least one connecting block is located in the inside of two adjacent edge beams.This application is by setting connecting block in the inside of at least one edge beam, make bearing frame be connected with external transfer equipment through connecting block, connecting block has greater contact area between edge beam, load can be dispersed to the greater area of edge beam through connecting block, effectively reduce stress concentration problem, while connecting block plays the role of strengthening, improve the tensile strength of edge beam, substantially reduce the risk that edge beam deforms or destroys under hoisting / transportation operating condition, effectively improve the problem that pull rivet in relevant technology is easily pulled out and lead to hoisting / transportation failure.

The application provides a mold partition heating control method for electric energy metering box production, comprising: obtaining a three-dimensional model of a multi-table position partition intersection area and an adjacent thin-walled area in a mold cavity of electric energy metering box production, calculating a volume ratio of corresponding mold steel materials of the two areas, and identifying a thermal inertia difference caused by a thick-thin transition interface; inputting the thermal inertia difference and a preset initial heating power into a support vector regression machine to predict a transient temperature difference zone formed between the intersection area and the thin-walled area in a heating stage, and extract a maximum temperature difference peak and valley and a time period when the maximum temperature difference peak and valley occur; evaluating resin local overheating and thin-walled solidification risk through the maximum temperature difference peak and valley, determining a first heating power according to the evaluated risk; analyzing an influence of a mismatch between a pushing speed of the intersection area and a pushing speed of the thin-walled area on residual internal stress accumulation at the multi-table position partition intersection, evaluating power redistribution requirements accordingly, and generating an output power distribution scheme of each independent heating circuit.

The utility model relates to the technical field of elevator guide rails, and discloses an anti-shaking elevator guide rail connecting device which comprises an upper guide rail and a lower guide rail, a connecting mechanism is arranged between the upper guide rail and the lower guide rail, the connecting mechanism is used for connecting the upper guide rail and the lower guide rail, and a mounting mechanism is arranged on the rear side of the connecting mechanism. The mounting mechanism is used for mounting the upper guide rail and the lower guide rail in an elevator shaft, the connecting mechanism comprises a connecting piece, the connecting piece is arranged between the upper guide rail and the lower guide rail, T-shaped grooves are formed in the top and the bottom of the connecting piece, and the bottom end of the upper guide rail is slidably connected into the T-shaped groove in the top end. According to the utility model, the T-shaped groove of the connecting piece is embedded into the I-shaped section of the guide rail in a sliding manner, the connecting rod is inserted into the slot, and the positioning bolt is rotationally propped against the side surface of the guide rail, so that the multi-direction shaking of the guide rail in the horizontal left-right direction, the vertical up-down direction and the front-back direction is limited, and the running stability and safety of an elevator are improved.

The utility model relates to the technical field of sealing gasket, especially to a double-layer composite sealing gasket, which comprises a metal ring, an annular cavity is arranged on the inner side of the metal ring, a rubber ring is fixed in the annular cavity of the metal ring, an annular deep groove and an annular shallow groove are arranged on the inner circumferential surface of the rubber ring, the annular deep groove and the annular shallow groove are connected through at least one sawtooth groove, the depth of the groove bottom of the sawtooth groove gradually decreases from the annular deep groove to the annular shallow groove, compared with the prior art, the composite structure of the metal ring and the rubber ring, combined with the unique annular deep groove, annular shallow groove and sawtooth groove on the inner circumferential surface of the rubber ring, can effectively improve the sealing performance of the sealing gasket, the annular deep groove and the annular shallow groove can form multiple sealing lines during the sealing process, and the blocking ability of the fluid is enhanced, the uniform distribution of pressure is facilitated by the through design of the sawtooth groove, stress concentration is reduced, and the pressure resistance and wear resistance of the sealing gasket are improved.