830 results about "Spring steel" patented technology

The invention discloses an automatic spring steel wire forming device with a guide structure and a use method thereof, and relates to the technical field of spring forming, the automatic spring steel wire forming device comprises a wire feeding mechanism, a pre-straightening and online detection module, an active flexible guide module, a force feedback forming module and a central control system; the pre-straightening and on-line detection module, the active flexible guide module and the force feedback forming module are sequentially connected in series along a feeding path of a steel wire and are electrically connected with the central control system; a precise actuator controlled by the central control system is arranged in the active flexible guide module; and the force feedback forming module comprises a forming part and a force sensor connected with the forming part, and the force sensor is used for feeding back the real-time forming force in the forming process to the central control system. Through closed-loop control of online sensing, active guiding and force feedback, intelligent adaptation to steel wire parameter changes is achieved, the spring forming precision and consistency are remarkably improved, the equipment reliability is remarkably improved, and the service life of the equipment is remarkably prolonged.

The invention provides an online detection and compensation method for local decarburization of a high-strength spring steel band, which comprises the following steps: arranging an oxygen content sensor in a continuous annealing furnace to monitor oxygen concentration in real time, and marking a potential decarburization risk section; scanning the risk section steel strip by adopting infrared thermal imaging, and generating a carbon distribution map to position a decarburization area; pulse laser heating is conducted on the decarburization area, and methane-argon mixed gas is introduced to achieve in-situ carburization; and finally, local thermal stress is eliminated through high-frequency induction heating. According to the method, decarburization risk dynamic early warning, defect accurate positioning, local efficient carbon supplementation and stress homogenization control are achieved, and the surface quality and fatigue performance of the steel strip are remarkably improved.

The invention provides a spring steel wire tension detection device capable of being quickly disassembled and assembled, which belongs to the technical field of steel wire detection and comprises a tensile machine, a buffer mechanism, a fixing mechanism, a locking mechanism and a triggering mechanism. The tensile machine comprises two clamps, and each clamp comprises a buffer mechanism arranged on the tensile machine and used for providing buffer force for a spring steel wire; the fixing mechanism is connected with the buffering mechanism, and the fixing mechanism is matched with the buffering mechanism to clamp and fix the spring steel wire; the locking mechanism is arranged on the buffering mechanism, and the fixing mechanism is limited and locked by the locking mechanism; and the triggering mechanism is arranged on the buffering mechanism, and the buffering mechanism triggers the triggering mechanism to move so as to relieve limiting of the locking mechanism to the fixing mechanism. According to the device, limiting can be automatically relieved after the spring steel wire is broken, an operator does not need to manually conduct complex unlocking operation, the spring steel wire can be rapidly pulled away, rapid dismounting of the spring steel wire is achieved, and the working efficiency is remarkably improved.

The invention discloses a reinforcement learning-based spring steel wire drawing control method, which comprises the following steps of: acquiring real-time process parameters to form a process state data sequence; inputting the process state data sequence into the state space model, and constructing a virtual working condition sample; based on the virtual working condition sample, pre-training a reinforcement learning controller and outputting an initial control strategy; inputting the initial control strategy into a lower-layer strategy network, and outputting a wire drawing speed adjusting instruction; the current process state and the wire drawing speed adjusting instruction serve as synchronous input, and an implicit context vector is generated; extracting control strategy characteristics in the edge controller, performing compressed encoding and forming control strategy representation; uploading the control strategy representation to a cloud server, and outputting a unified global control strategy model; and carrying out anomaly detection on the current process state, and if a detected state reconstruction error exceeds an anomaly judgment threshold, triggering safety control logic. The spring steel wire drawing control device realizes spring steel wire drawing control.

The invention relates to large-specification alloy spring steel and a production method thereof. The control process comprises the steps of steelmaking, bloom continuous casting, heating cogging, coping flaw detection, anti-decarburization segmented spraying, small square billet heating, high-speed wire controlled rolling, stelmor wire controlled cooling and coil collecting and packaging. And the surface quality and the structure property uniformity of the wire rod are effectively improved by combining segmented spraying of the anti-decarburization coating with a refined controlled rolling and controlled cooling process, and the wire rod can be used for preparing the large-size high-strength automobile suspension spring.

The invention provides an anti-extrusion cable and a cable connection structure, and relates to the technical field of cables.The anti-extrusion cable comprises a cable body, the cable body comprises a middle sheath, a shielding layer, a plurality of guide cores, a filling layer and an inner insulating sheath, the guide cores are evenly arranged on the inner side of the middle sheath, and the shielding layer is arranged on the inner side of the middle sheath; the guide cores, the inner insulating sheaths and the shielding layers are arranged in a one-to-one correspondence manner, the inner insulating sheaths tightly wrap the outer sides of the guide cores, the shielding layers tightly wrap the outer sides of the inner insulating sheaths, and the filling layers are filled in gaps between the shielding layers and the middle sheath; a middle sheath of a cable main body is made of chloroprene rubber materials and provides stable support for an internal structure, a spiral spring steel wire fixedly sleeved on the outer side of the middle sheath can effectively disperse external extrusion acting force and improve the overall anti-extrusion performance of the cable, and a silicone rubber layer coated on the outer side of the steel wire is tightly attached to the steel wire and extends to the outer wall of the middle sheath to be in hot melting connection, so that the service life of the cable is prolonged. And extrusion impact can be buffered in an auxiliary manner.

The steel comprises the following chemical components in percentage by mass: 0.40 to 0.55 percent of C, 0.80 to 1.20 percent of Si, 0.80 to 1.60 percent of Mn, 0.90 to 1.25 percent of Cr, less than or equal to 0.020 percent of P, less than or equal to 0.015 percent of S, less than or equal to 0.15 percent of Cu, less than or equal to 0.08 percent of V and less than or equal to 0.20 percent of Nb, 0.0005 to 0.0050 percent of B, 0.015 to 0.025 percent of N, less than or equal to 0.15 percent of Ni, less than or equal to 0.05 percent of Mo, 0.04 to 0.10 percent of Ti, less than or equal to 0.001 percent of Ca, less than or equal to 0.0008 percent of [O] and the balance of Fe and inevitable impurity elements. After heat treatment, the tensile strength of the steel is 1800 MPa or above, the yield strength is 1620 MPa or above, the ductility is 10% or above, the area reduction rate is 40% or above, and the yield ratio is 0.90 or above; and the boundary dimension precision is that the dimension precision of phi 45 to phi 60 is less than or equal to + / -0.05 mm, and the surface has no defect. According to the invention, key procedures are optimized, researched and controlled, so that the high-performance spring steel for the stabilizer bar of the commercial vehicle has ultrahigh purity, high strength and high yield ratio, and is superior to the existing spring steel for the stabilizer bar of the commercial vehicle.

The present invention discloses a production method for reducing slag grooves during the casting process of spring steel billets, specifically: the superheat degree of the continuous casting molten steel is between 20 and 40°C, slag is automatically added to the continuous casting billet, and the protective slag is transported to the crystallizer through compressed air as a carrier, thereby ensuring a relatively high concentration of compressed air atmosphere at the upper mouth of the crystallizer, which has a combustion-supporting effect on the protective slag, thereby improving the melting effect of the protective slag. The insertion depth of the submerged nozzle is 70‑80mm, which ensures a relatively high temperature of the molten steel on the meniscus of the crystallizer, thereby improving the melting effect of the slag surface. The slag line remains unchanged during the casting process; the crystallizer uses high-frequency and high-amplitude vibration parameters to increase the negative slip time and the crystallizer vibration advance, which is beneficial to the inflow of liquid protective slag into the air gap between the billet and the copper tube, thereby avoiding the slag groove phenomenon during the billet casting process.

The utility model discloses a magnetic door lock which comprises a shell, a spring bolt, an unlocking mechanism and an external lock groove, the spring bolt is rotationally arranged in the shell, a spring bolt hole is formed in the position, corresponding to the tongue end of the spring bolt, of the shell, and the interior of the lock groove is in magnetic attraction fit with the tongue end; the unlocking mechanism comprises a rotor, a shifting block and a reset torsion spring, the two ends of the rotor are in running fit with the shell, the shifting block is arranged on the periphery of the rotor in a sleeving mode and is in transmission fit with the rotor, one end of the shifting block is provided with a shifting arm used for touching the root end of the spring bolt, the reset torsion spring is round and is arranged outside the rotor in a sleeving mode, and the two ends of a spring steel wire of the reset torsion spring are provided with clamping feet. The two clamping feet abut against the shifting block and the shell respectively so as to provide acting force for driving the shifting arm to leave the tongue root end. The unlocking mechanism of the magnetic door lock is driven by the rotor, the two ends of the rotor abut against the front side and the rear side of the shell, a better supporting effect is achieved, and rotation is more stable and reliable; meanwhile, the unlocking mechanism does not have a linkage relation with other mechanisms and acts independently, transmission resistance is reduced, and operation is more labor-saving and reliable.

The utility model relates to the field of drilling tools for wells, in particular to a self-adaptive rotary steering drilling tool which comprises a drill bit body and a damping column, a plurality of blades are sequentially arranged on the crown portion of the drill bit body in the circumferential direction, the cutting faces of the blades are fixedly connected with a plurality of cutting teeth, and mounting holes are formed in the outer side faces of the blades. Steel sleeves are fixedly arranged in the mounting holes, the damping columns are movably inserted in the steel sleeves, the ends, located in the steel sleeves, of the damping columns are fixedly connected with connecting bases, adjusting plates are arranged between the connecting bases and the bottoms of the steel sleeves, and outer-layer low-rigidity spiral springs are connected between the adjusting plates and the connecting bases. An inner layer high-rigidity conical spring is arranged on the inner side of the outer layer low-rigidity spiral spring, and an adjusting assembly for adjusting the adjusting plate and the bottom of the steel sleeve is arranged on the steel sleeve. The drill bit can better adapt to different pressure requirements, and the drill bit is prevented from bearing overlarge impact force, so that the cutting teeth are protected, and the service life of the drill bit is prolonged.

The utility model discloses a durable sealing type lampshade of an automobile headlamp, and relates to the technical field of automobile lampshades. The LED lamp comprises a lampshade heat dissipation end cover and a transparent lampshade, an installation protruding ring is fixedly installed on the end face of the transparent lampshade, and elastic sealing assemblies used for sealing the lampshade heat dissipation end cover and the transparent lampshade are arranged on the end face of the transparent lampshade and the end face of the lampshade heat dissipation end cover. According to the LED lamp, the bolts are in threaded insertion with the surfaces of the mounting convex ring, the elastic sealing assembly and the lampshade heat dissipation end cover, so that the transparent lampshade and the lampshade heat dissipation end cover are fixed, and the elastic sealing assembly is compressed; the gap between the transparent lampshade and the lampshade heat dissipation end cover is sealed through the elastic sealing assembly, a C-shaped structure is formed by the arc-shaped sealing ring on the top face of the first sealing ring and the arc-shaped spring steel strip in the arc-shaped sealing ring, and a C-shaped opening faces the outside, so that rainwater and the like can be drained.

To provide a stretch cord that can be easily attached to various parts of the body. [Solution] A stretch cord (10) has a composite spring structure (3) in which a spring steel wire (1) is threaded through a tube member (2), and a main tube portion (5) connected to ring members (4) at both ends, and can be wrapped around the body to provide pressure, acupressure, and stretching. When the stretch cord (10) is wrapped around the body, the elasticity of the spring steel wire (1) applies pressure to the muscles and tendons, preventing them from being pushed outward. When the body is moved with the stretch cord (10) worn, the elasticity of the spring steel wire (1) stimulates the muscles and tendons, providing acupressure and relieving stiffness. When the stretch cord (10) is wrapped around the body in a spiral, the return force of the spring steel wire (1) stretches the muscles and tendons, preventing them from contracting.

The invention relates to the technical field of rubber hoses, in particular to a pressure-resistant and oil-resistant rubber hose and a preparation method thereof.The preparation method comprises the following steps that S1, nitrile rubber, chloroprene rubber, chlorosulfonated polyethylene, chlorinated polyethylene, sulfur, an accelerant and an anti-aging agent are added into an internal mixer to be evenly mixed, the temperature is controlled for mixing, sheet discharging is conducted, a pipe blank is extruded through an extruder, and the pipe blank is obtained; a combined rubber layer is obtained; s2, the combined rubber layer, the woven copper-plated steel wire layer, the reinforcing layer, the spiral zinc-plated spring steel wire layer, the reinforcing layer, the woven copper-plated steel wire layer and the combined rubber layer are subjected to interlayer bonding in sequence, and the assembled hose is obtained; and S3, the assembled hose is put into a vulcanizing tank to be subjected to vulcanizing treatment. By adopting the seven-layer composite structure design, the rubber hose disclosed by the invention can be in contact with a strong corrosive medium for a long time without internal corrosion, so that the service life of the hose is prolonged, and the safety of the hose in the use process is also improved.

The invention relates to the technical field of oiling devices, and discloses a spring steel wire oiling device which comprises an oiling device body, the oiling device body comprises a shell, a control device is installed in front of the shell, a control module is arranged in the control device, and a base is installed at the edge of the bottom of the shell. An oil recovery device is installed on the right side of the bottom of the shell, an oiling mechanism is installed in the middle of the top of the shell, a conveying device is arranged in the shell, the shell and the shell are located on the same plane, a gas conveying mechanism is installed on the left side of the top of the shell, and a cleaning mechanism is installed on the inner wall of the right side of the shell. By arranging the gas conveying mechanism and the cleaning mechanism, hot air generated by the gas conveying mechanism can be conveyed to the surface of the water absorption plate through the gas groove and the spray gun, the dewatering efficiency of the water absorption plate is improved, and whether the surface of the spring steel wire meets the production standard or not can be analyzed by the control module through real-time air pressure data changes.

The invention discloses a production method of a low-cost carbon spiral spring steel wire rod, the chemical components of the steel grade do not contain precious alloy elements, the production process comprises the steps of converter top and bottom combined blowing smelting, LF refining, 6 # small square billet continuous casting, slow cooling and rolling in a wire factory, and the use requirements of users can be met without VD refining furnace production.

The utility model discloses a vertical vibration reduction support based on piezoelectric energy consumption for bridge engineering, which comprises a base plate, a lower seat plate arranged in the base plate, a middle seat plate arranged on the lower seat plate, an upper seat plate arranged on the middle seat plate, and a vibration reduction disc arranged in the base plate and used for vertical vibration reduction. The upper end of the damping disc makes contact with the lower seat plate, a piezoelectric energy dissipation assembly is arranged between the damping disc and the base plate, the damping disc is in an arch shape, the arc face of the damping disc is connected with the pressure bearing block, and the plane of the lower end of the pressure bearing block is connected with the piezoelectric energy dissipation assembly. The vibration reduction disc is made of a spring steel material and adopts an arch-shaped structure, so that stable vertical support can be provided for an upper structure under the action of static force. Vibration reduction and energy consumption of the vertical support are achieved through the piezoelectric energy consumption assembly, the piezoelectric energy consumption assembly converts high-frequency vibration mechanical energy of the support into electric energy through the two piezoelectric ceramic plates, the energy consumption efficiency is high, the working temperature range is wide, and the adaptive capacity is high.

The utility model relates to the technical field of disassembly and assembly mechanisms, and discloses a quick replacement structure of a segmented mold of a tire forming vulcanizer, which comprises a piston rod, a connecting shaft head and a connecting disc, and the bottom of the piston rod is connected with the connecting shaft head which is in threaded connection with the piston rod through a transition nut. The transition nut and the connecting shaft head are connected and fixed through the fixing bolt, the connecting shaft head and the connecting disc are in butt joint through the cross spline, the steel ball abuts against the interior of an arc-shaped groove in the cross spline through mutual cooperation of the spring, the steel ball and the fastening bolt in the connecting disc, and the cross spline on the connecting shaft head is locked. The cross-shaped spline is prevented from loosening, when the die needs to be replaced, only the connecting shaft head needs to be rotated through a wrench, so that the cross-shaped spline overcomes the force of the spring, locking of the cross-shaped spline is relieved, the cross-shaped spline can be rotated to be aligned with the butt joint groove, the connecting shaft head can vertically slide along the butt joint groove, and rapid replacement of the die is achieved.

The utility model discloses a steel structure arranging, fixing, welding and forming device, which relates to the technical field of steel structure welding and comprises a bottom plate, a fixing plate and a supporting plate are arranged on the bottom plate, connecting plates are arranged outside the fixing plate, a guide plate is arranged between the two connecting plates, and sliding grooves are formed in the connecting plates. A sliding groove is formed in the upper portion of the guide plate, a movable plate is arranged in the sliding groove, sliding blocks are arranged outside the movable plate and the guide plate, clamping plates used for fixing profile steel are arranged outside the sliding blocks, a guide rod is arranged between the two clamping plates, and a plurality of springs are arranged outside the guide plate in a sleeving mode. The clamping plates get close to each other and fix transverse profile steel, the pressing plate extrudes and fixes longitudinal profile steel, the movable plate drives the lifting plate to move up and down through the rotating plate, the height of the longitudinal profile steel can be adjusted, the profile steel is prevented from shaking in the welding process, and the welding efficiency of a steel structure is improved.

The utility model relates to the technical field of aircraft power supply connection, in particular to a two-way elastic clamping jaw double-locking anti-falling battery connector, which comprises an upper elastic sheet, a lower elastic sheet, a first clamping jaw and a second clamping jaw, first clamping jaws are fixedly connected to the front end faces of the upper elastic piece and the lower elastic piece, first clamping grooves are formed in the first clamping jaws, a plurality of evenly-arranged first anti-skid teeth are fixedly connected to the inner walls of the first clamping grooves, second clamping jaws are fixedly connected to the rear end faces of the upper elastic piece and the lower elastic piece, and second clamping grooves are formed in the second clamping jaws. The inner wall of the second clamping groove is fixedly connected with a plurality of second anti-skid teeth which are uniformly arranged; the connecting device is suitable for different temperatures through the double-piece spring steel clamping jaw made of stainless steel, the clamping force and the clamping angle of the clamping jaw can be flexibly adjusted, and the universality and the adaptability of the connecting device are greatly improved.

The invention discloses alloy spring steel, a wire rod, a spring and a preparation method and application thereof and belongs to the technical field of alloy spring steel. The preparation method of the alloy spring steel comprises the following steps: S1, steelmaking; s2, performing continuous casting to obtain a bloom; s3, the large square billets are subjected to hot charging and hot conveying to a heating furnace, and cogging is conducted after heating, so that small square billets are obtained; in the hot charging and hot delivery process, after high-pressure water is adopted for descaling a bloom, anti-decarburization slurry A is sprayed; the coating A is prepared from the following components: 35 to 40 percent of SiO2, 22 to 26 percent of SiC, 11 to 15 percent of Al2O3, 6 to 10 percent of MgO, 5 to 8 percent of TiO2, 3 to 6 percent of ZrO2 and 3 to 6 percent of CaO; s4, cold charging and spraying of anti-decarburization slurry B; and S5, the small square billet is heated, rolled and cooled, and the alloy spring steel is obtained. On the basis of ensuring the strength and fatigue resistance of the spring, the production cycle is shortened, the loss is reduced, and the cost is reduced.

The invention discloses a correction device for a spring steel wire, and relates to the technical field of spring steel wire treatment, the correction device comprises: a support assembly for fixing and supporting the spring steel wire; the correction assembly comprises a plurality of correction units, each correction unit is composed of a pair of correction rollers which are oppositely arranged, and all the correction units are used for correcting the spring steel wire; the driving assembly is used for driving the supporting rollers in the supporting assembly and the correcting rollers in the correcting assembly to rotate; the control assembly comprises a control module and is used for carrying out primary adjustment on the correction device by collecting sensor data; and the detection assembly comprises a laser range finder and an image module and is used for performing quality detection on the corrected spring steel wire to obtain a detection result and performing secondary adjustment on the correction device based on the detection result. The correction quality of the spring steel wire can be remarkably improved, the production cost can be effectively reduced, and the production efficiency is improved.

The spring steel wire twisting tension releasing mechanism comprises a driving shaft, a first winch, a second winch, a third winch and a connecting bolt, and a driving shaft through hole is formed in the driving shaft; a first winch screw hole is formed in the center of the first winch, and a connecting screw hole and a fixed roller groove are further formed in the first winch; a second winch screw hole is formed in the center of the second winch, and a sliding block moving groove and a connecting through hole are formed in the second winch; a second winch screw hole is formed in the center of the third winch, a fixed roller groove and a connecting hole are formed in the third winch, and a first roller is arranged in the fixed roller groove; the connecting bolt sequentially penetrates through the connecting hole of the third winch, the connecting through hole of the second winch and the locking screw hole of the first winch. The second winch is arranged between the first winch and the third winch, and the position of the sliding block assembly arranged on the second winch can be adjusted, so that tension release of a steel wire strand can be effectively adjusted, and the twisting quality of a steel wire rope is conveniently guaranteed.

The invention relates to the technical field of spring steel preparation, in particular to a high-strength spring steel wire rod and a preparation method and application thereof. According to the steel wire rod, the content of C, Si, Mn, Cr, Mo, V, Nb and other elements is controlled, the strength and plasticity index SE is limited to be 1.25-1.75%, and meanwhile, the steel wire rod subjected to hot rolling of a continuous casting bloom is subjected to three-section controlled cooling through a Stelmor line, specifically, the steel wire rod is rapidly cooled to 670-710 DEG C at the speed of 4.2-5.5 DEG C / s, then slowly cooled to 620-630 DEG C at the speed of 0.3-0.5 DEG C / s, and finally air-cooled to 530-550 DEG C at the speed of 1.8-2.2 DEG C / s. According to the high-strength spring steel wire rod for the electric tailgate spring, through collaborative design of components and the process, the problem that when the ultrahigh strength of an existing high-strength spring steel wire rod for the electric tailgate spring is achieved, it is difficult to synchronously guarantee excellent structure uniformity, good plasticity and excellent fatigue performance is effectively solved.

The invention relates to the field of robot dogs, and particularly discloses a robot dog-based dam termite detection device which comprises a robot dog, a moving plate is arranged on the abdomen of the robot dog in a lifting manner, a spherical sealing tank is arranged on the moving plate, blocking liquid is arranged in the spherical sealing tank, and a sealing opening is formed in the position, away from the abdomen of the robot dog, of the spherical sealing tank. An anti-collision ring is arranged on the hole wall of the sealing opening, a round spring steel sheet attached to the inner wall of the spherical sealing tank is arranged in the spherical sealing tank, a plurality of holes are formed in the round spring steel sheet, a connecting rod is fixedly connected to the circle center of the round spring steel sheet, and a containing frame is arranged at the bottom end of the connecting rod. A telescopic sealing pipe is fixedly connected to the connecting position of the connecting rod and the sealing opening, a radar antenna module is arranged in the containing frame, a radar host module is arranged on the back of the robot dog, and an adjusting mechanism for adjusting the inclination angle of the radar antenna module is arranged on the containing frame. The robot dog has the effect of improving the stability of the ground penetrating radar installed on the robot dog.

The utility model discloses a spring steel wire processing and cutting device, which relates to the technical field of spring steel wire processing, and particularly comprises a workbench, straightening structures and a cutting and shaping structure, the straightening structure comprises a moving frame connected with the workbench through a second hydraulic telescopic rod, a double-end ball screw movably connected with the top end of the moving frame, ball nuts in threaded connection with the outer rings of the two ends of the double-end ball screw, and clamping plates fixedly connected with the ball nuts. The two sides of the top of the workbench are connected with lifting tables through first hydraulic telescopic rods. The cutting and shaping structure comprises a cutting table and a fixing plate. The spring steel wire machining and cutting device is diverse in function, the shape of a spring steel wire before and after cutting can be adjusted, the cutting quality is guaranteed, and follow-up machining of the spring steel wire is facilitated; the shape of the spring steel wire before and after cutting can be detected in real time through the visual sensor, and the cutting quality of the spring steel wire is controlled.

A box magazine fed firearm includes pinch tabs in the receiver of the firearm. In one embodiment, the pinch tabs are opposing pieces of spring steel extending upwardly and inwardly from opposing lateral sides of the receiver. In one embodiment, the pinch tabs are sections of flat spring steel bent into an arcuate shape and secured to the receiver by screws. In one embodiment, tension screws are used to adjust an inward bias of each of the pinch tabs.

A safe valve can work stably in high and low temperature environment. It relates to the field of safe valve. The existing safe valve causes the steel ball to be stuck due to unreasonable structure, which seriously affects the normal operation of the lubricating oil system. The utility model discloses a safe movable shell, a nut, a sealing ring, a spring, a steel ball, a spring seat, an oil inlet and an oil outlet. The safe movable shell is provided with an oil inlet and an oil outlet respectively. The safe movable shell is fixedly connected with the nut. The sealing ring is arranged between the safe movable shell and the nut. The spring seat is arranged on the end of the nut close to the steel ball. The spring seat is connected with the safe movable shell and the nut respectively. The spring is arranged between the spring seat and the steel ball. The steel ball is assembled in the oil inlet of the safe movable shell through clearance fit and between the spring. The steel ball is pushed by the lubricating oil pressure. The steel ball pushes the spring to compress the spring. The opening and closing of the oil inlet by the steel ball are realized. The utility model is applied to the field of safe valve of lubricating oil system.

The invention relates to corrosion-resistant spring steel for a high-speed railway elastic strip and a production method thereof, and belongs to the technical field of metallurgy. The spring steel comprises the following chemical components in percentage by mass: 0.55 to 0.60 percent of C, 1.6 to 2.0 percent of Si, 0.70 to 0.90 percent of Mn, 0.015 to 0.035 percent of P, less than or equal to 0.005 percent of S, 0.10 to 0.30 percent of Ni, 0.50 to 0.70 percent of Cr, 0.10 to 0.20 percent of Cu, 0.02 to 0.04 percent of Nb, less than or equal to 0.03 percent of Al, 0.01 to 0.03 percent of RE and the balance of Fe and inevitable impurities. The production method comprises the steps of smelting, continuous casting, heating, rolling and heat treatment. An elastic strip processed from the spring steel has the advantages of high surface decarburization resistance, excellent fatigue resistance, excellent corrosion resistance, excellent hydrogen embrittlement resistance and the like, and meets the requirements of complicated and harsh working conditions of railways.

The invention discloses a fabricated building supporting seat for constructional engineering, and relates to the technical field of constructional engineering. The device comprises a lower support, a supporting column is arranged in the lower support, a spherical groove is formed in the top of the supporting column, a spherical plate is rotatably mounted in the spherical groove, an upper support is mounted at the top of the supporting column, and main spring steel plates are fixedly mounted on the periphery of the supporting column; the end, close to the interior of the lower support, of the strength adjusting bolt is provided with a limiting part and an anti-disengaging part. The auxiliary spring steel plates are arranged at the four corners of the lower support, the main spring steel plates abut against the auxiliary spring steel plates, the double-damping design is adopted, the auxiliary spring steel plates can provide additional elastic support, when the main spring steel plates are subjected to large external force or vibration, the abutting effect of the auxiliary spring steel plates can effectively share part of stress, and the damping effect is good. And the shock resistance of the support is improved, so that the influence of vibration transmitted to the structure is effectively reduced.

A wire rod for a spring, according to one embodiment of the present invention, comprises: 0.45-0.65 wt% of carbon (C); 1.20-2.00 wt% of silicon (Si); 0.30-1.00 wt% of manganese (Mn); 0.015 wt% or less (excluding 0) of phosphorus (P); 0.015 wt% or less (excluding 0) of sulfur (S); 0.01 wt% or less (excluding 0) of nitrogen (N); at least one element of 0.20 wt% or less of vanadium (V), 0.050 wt% or less of niobium (Nb), and 0.050 wt% or less of titanium (Ti); and the balance consisting of iron (Fe) and other unavoidable impurities, wherein the following equation 1 is satisfied. [Equation 1] 5 ≤ (V+Nb+Ti) / N (In equation 1, V, Nb, Ti, and N respectively represent the atomic weight ratios of vanadium, niobium, titanium, and nitrogen).