101results about How to "Improve stress" patented technology

The present invention discloses a smoke damper movement mechanism, including a smoke damper and a movement mechanism, the movement mechanism including a driving mechanism and a transmission mechanism, the transmission mechanism including: a first hinge, as a driven arm, having a first end and a second end opposite to each other, the second end of the first hinge being rotatably connected to the smoke damper; a second hinge, as a driving arm driven by the driving mechanism, having a first end and a second end opposite to each other, the second end of the second hinge being rotatably connected to the smoke damper, the connection position between the first hinge and the smoke damper being located above the connection position between the second hinge and the smoke damper; a transmission rod, connected between the driving mechanism and the first end of the second hinge, transmitting the driving force of the driving mechanism to the second hinge; an auxiliary closing mechanism, arranged at the first end of the first hinge, at the extreme position of the movement of the smoke damper, the transmission rod applies downward pressure to the auxiliary closing mechanism, so that the first hinge tightens the smoke damper. Also disclosed is a range hood having the above-mentioned smoke damper movement mechanism applied thereto.

According to the biped robot foot structure capable of adapting to the complex road surface, the whole foot structure is designed through modular decomposition, when a user walks on the wet and slippery flat ground, the foot obtains information of foot sole sensors on the front foot sole and the rear foot sole in real time, and the virtual constraint structure is actively controlled through an electric cylinder; stress of a front longitudinal arch sole joint is reduced, meanwhile, the ground pressure transmission direction of a foot structure is improved, the ground pressure is kept in a friction cone as much as possible, and therefore the robot is prevented from slipping; when the robot walks on an uneven road surface, the electric cylinder actively controls the ground contact angle of the front foot sole, and the spring guide rod of the rear foot sole is assisted, so that active and passive self-adaptive adjustment of the foot of the robot to the ground is realized. The electric cylinder is used as a virtual constraint structure for active control, and the spring telescopic rod structure of the rear sole imitating ligament is combined, so that active and passive self-adaption of the feet of the robot to different complex road surfaces is realized, and the adaptability of the biped robot to the complex road surfaces is improved.

The invention discloses a steel casing-steel pipe pile combined pile group regulation and control system and method in a water area environment. A combined pile group comprises a steel casing, a steel rail assembly and a combined steel rod truss. The steel rail assembly comprises a plurality of vertical steel rails arranged on the outer wall of the steel casing and horizontal steel rails arranged at the bottoms of the vertical steel rails and horizontally arranged in the circumferential direction of the outer wall of the steel casing. The combined steel pole truss comprises a plurality of steel pole truss units which comprise steel pole limiters, steel poles and steel pile limiters at the same time; grouting pipes are respectively arranged on the lower sides of the inner walls of the steel casing and the steel pile; the regulation and control system comprises an axial force strain gauge, an underwater controllable jack and a ground management system; axial force changes of the pile group structure in actual work are measured through the steel rod axial force strain gauges and are output into a ground management system; and the position of the steel rod limiting stopper is adjusted through the underwater controllable jack, so that the axial force of the whole truss structure is uniformly distributed to a limited range, and the real-time monitoring and adjustment of the stability of the combined pile group structure are realized.

The invention discloses a detachable drill rod box for high-position drilling construction of an electric drilling machine and a using method. The detachable drill rod box is provided with a first box unit, at least one second box unit and a third box unit. The first box unit, the second box unit and the third box unit are in vertical sliding connection; the lifting assembly is arranged at the side part; bottom plate assemblies are arranged at the bottoms of the first box unit, the second box unit and the third box unit in a sliding mode, and bottom plate oil cylinders are arranged below the bottom plate assemblies. The detachable drill rod box for high-position drilling construction of the electric drilling machine has the advantages of being flexible to move, large in rod carrying amount, high in drill rod loading and unloading efficiency, high in roadway adaptability and the like; an internal drill rod pushing and lifting mechanism is arranged, and the rod feeding efficiency is high; the drill rod grabbing position of the manipulator is fixed, the stress condition is good, and the safety coefficient of the mechanical structure is high; during construction, workers do not need to climb to fill the drill rod box, the labor intensity of the workers and the safety accident rate are greatly reduced, and automation of drilling equipment is further improved.

The invention provides a stator punching sheet, a stator core, a motor and a compressor, relates to the technical field of compressors, and solves the technical problem of poor heat dissipation performance of a vortex motor. The stator punching sheet comprises a punching sheet body and a plurality of oil through holes arranged in a yoke part. And all the oil through holes and all the stator inner grooves are arranged in a one-to-one correspondence manner. According to the invention, the oil through holes are formed in the yoke part corresponding to the stator inner grooves, so that oil flowing from the edge originally is forced to flow to the internal opening area, and a flowing oil-gas mixture can take away most heat when flowing through the oil through holes, so that the heat dissipation performance of the stator during operation is greatly improved; the vortex motor can be kept at a low temperature in the operation process through good heat dissipation, resistance increase and magnetic loss increase caused by temperature rise are reduced, and therefore the efficiency and the output power of the motor are improved, the motor can stably operate in a wider load range, and good performance is kept.

The present invention provides a tunnel boring machine equipped with a high-pressure water jet cutting system and a combined excavation method, including a tunnel boring machine body, a flow pump group is arranged on the tunnel boring machine body, and a high-pressure water jet cutting system is arranged at the front end of the tunnel boring machine; the high-pressure water jet cutting system includes a water jet-mechanical combined cutter disc, a water jet-shell knife combined tool, a high-pressure water transmission pipeline, a multi-media rotation center and a water jet diverter valve block, wherein one end of the high-pressure water transmission pipeline is connected to the flow pump group, and the other end is connected to the multi-media rotation center, and the multi-media rotation center is connected to the water jet diverter valve block, and the high-pressure water is divided into multiple paths, which are respectively supplied to each water jet-shell knife combined tool on the water jet-mechanical combined cutter disc. The present invention provides practical suggestions and references for the overall design, optimization and spatial layout of the high-pressure water jet system.

An operation platform is arranged on the periphery of the reaction kettle, a metering device is fixedly arranged at the position, close to a feeding port of the reaction kettle, of the operation platform, a vertical frame is fixedly arranged at the position, between the feeding port of the reaction kettle and the metering device, of the operation platform, and a turnover mechanism is installed on the vertical frame. The rear part of the turnover mechanism is connected with the front part of the turnover plate, the rear part of the turnover plate is in sliding connection with the front part of the rotating frame, the charging barrel is placed in the rotating frame, and the charging barrel and the rotating frame are placed on the metering device together; the auxiliary material metering and feeding device is simple in structure and easy and convenient to operate, in the process of overturning the charging barrel, the gravity of the charging barrel is overcome through the connecting rod overturning mechanism, a rotating fulcrum is moved downwards, the stress condition of the connecting rod overturning mechanism is good, the use safety performance of all stress parts is improved, manpower is saved, and the arranged overturning plate and the metering device are convenient to use. And the auxiliary material feeding metering error is reduced, and the auxiliary material feeding amount precision and the production efficiency are improved.

The invention relates to the technical field of unmanned aerial vehicles, in particular to a multi-rotor loading unmanned aerial vehicle which comprises a rack, a cabin and a foot stool. The engine room and the foot stool are fixedly connected with the rack, an upper-layer engine arm and a lower-layer engine arm are arranged in the rack, the upper-layer engine arm and the lower-layer engine arm are fixedly connected through a first support rod and a second support rod, meanwhile, the upper-layer engine arm and the lower-layer engine arm are both arranged in a two-section foldable mode, and a connecting assembly is arranged at the folding position. The upper-layer vehicle arm and the lower-layer vehicle arm can be unfolded and folded in the horizontal direction through the connecting assemblies and are locked after being unfolded. According to the unmanned aerial vehicle, by arranging the two layers of vehicle arms, the load capacity of the unmanned aerial vehicle is greatly improved, the effective load of the unmanned aerial vehicle can reach 100 kg through connection and fixation of the support rods and arrangement of the propellers, the blank of the large-load field of an existing unmanned aerial vehicle is filled up, in addition, the upper-layer vehicle arms and the lower-layer vehicle arms are arranged in a foldable mode, and the unmanned aerial vehicle is convenient to use. The occupied area can be effectively saved when the unmanned aerial vehicle is parked, and convenience is brought to use.

The application relates to the technical field of zirconium-niobium alloy material processing, in particular to a preparation method of a large-diameter zirconium-niobium alloy pipe for nuclear industry, which comprises the following steps: S1, mixing nuclear-grade sponge zirconium and niobium scraps, or mixing zirconium-niobium alloy, zirconium dioxide and iron; melting the mixture and preparing a zirconium-niobium alloy ingot; S2, sequentially performing large deformation forging in a beta single-phase zone and an alpha+beta two-phase zone; S3, drilling a central hole in the axial direction of a round-forging blank; quenching in the beta single-phase zone; S4, coating an anti-galling agent on the surface of the central hole and heating to prepare a pipe blank in the mode of cross piercing; S5, performing periodic forging and rolling on the pipe blank; S6, annealing the hot-rolled pipe twice; and straightening the hot-rolled pipe after the second-stage annealing. The zirconium-niobium alloy pipe has uniform microstructure, good mechanical properties and corrosion resistance, the production direction of the brittle hydride is nearly parallel to the circumferential direction of the pipe, and brittle damage of the pipe wall thickness caused by the crack propagation of the hydride is avoided.

The present invention discloses a two-stage compression vane vacuum pump with an asymmetric cylinder profile. The vacuum pump comprises a front cover (1), a rotor (2), a cylinder (3), a vane (4) and a rear cover (5). The contour profile of the cylinder (3) consists of five different curves, and the first-order derivative and the second-order derivative are continuous. During operation, two cavities with different volumes and asymmetry are formed between the front cover (1), the cylinder (3), the rear cover (5) and the rotor (2). The gas completes a primary compression process in the primary cavity (301) and then enters the secondary cavity (302) for secondary compression, thereby realizing two-stage compression. The front cover (1) is provided with a first air intake port (101) and a second air exhaust port (102), and the rear cover (5) is provided with a first air exhaust port (502) and a second air intake port (501). The disclosed vacuum pump not only has a larger internal volume ratio and improves the vacuum degree, but also reduces its power consumption and the clearance volume.

This utility model provides a windshield screen for rail vehicles, which reduces the gap between the screen and the seat by connecting to the seat. The connection position can be flexibly adjusted during installation, facilitating installation. Its structure includes a windshield screen body and handrails. One end of the handrail is connected to the vehicle body, and the other end is fixedly connected to the windshield screen body. The windshield screen body is fixedly connected to the bottom and side of the seat via connectors. The handrail is connected to the vehicle body via an adjustable connection structure, which includes a handrail connecting seat and a vehicle body connecting seat. The handrail connecting seat has an oblong hole extending along the axis of the corresponding position of the handrail. One end of the vehicle body connecting seat is fixedly connected to the vehicle body, and the other end can be bolted to the oblong hole after the handrail and windshield screen body are in place.

The utility model discloses a device for controlling the length of a columnar activated carbon forming strip, which comprises a shell, a cutting component and a driving component, the driving component comprises two groups of chain wheel mechanisms, a motor and a rotating shaft, and each chain wheel mechanism comprises a driving chain wheel, a driven chain wheel and a chain for connecting the driving chain wheel and the driven chain wheel; according to the utility model, the cutting assembly and the driving assembly are arranged, so that after activated carbon is extruded by the activated carbon strip extruding equipment, the running speed of the cutting assembly is adjusted, and the activated carbon material can be cut into standard and consistent length in time; the problem that in the prior art, the self-fracture length of carbonized materials entering the carbonization furnace is not easy to control under high temperature and rotary material turning is solved, and therefore the product quality is improved.

The utility model relates to the technical field of inner supporting beam supporting, and discloses a haunched inner supporting beam which comprises an inner supporting beam body, an engineering beam, a first side haunch portion and a second side haunch portion, and the engineering beam penetrates through the inner supporting beam body and is fixedly arranged in a connected mode. The inner supporting beam is provided with a first beam side face and a second beam side face, the first side haunch portion corresponds to the first beam side face, and the second side haunch portion corresponds to the second beam side face. The first side axillary part comprises a plurality of first axillary steel bars, the first axillary steel bars are correspondingly arranged at intervals, the second side axillary part comprises a plurality of second axillary steel bars, the second axillary steel bars are correspondingly arranged at intervals, and the first axillary steel bars and the second axillary steel bars are anchored into the inner supporting beams respectively. Under the action of the first side haunch part and the second side haunch part, the two sides of the inner supporting beam are reinforced, the internal force distribution of the inner supporting beam is more reasonable, meanwhile, the stress condition of the inner supporting beam is improved, the supporting reliability of the inner supporting beam is improved, and the supporting strength of a foundation pit is improved.

The utility model relates to a luminous water hose and a conveying system, the water hose comprises a lining and luminous guide lines, a conveying channel is defined by the lining, at least two braid layers are sleeved on the outer side of the lining, and the luminous guide lines are clamped between two adjacent braid layers and are arranged along the length direction of the conveying channel; according to the water hose, the light-emitting guide lines are clamped between the two adjacent woven layers, on one hand, the light-emitting guide lines do not need to be woven through weaving equipment in the forming process of the water hose, the light-emitting guide lines cannot be damaged, the forming technology of the water hose can be simplified, and cost is reduced; and on the other hand, after the luminous water hose is formed, the luminous guide line has no pre-tightening force in the length direction, so that the stress condition of the luminous guide line can be greatly improved, the service life of the luminous guide line is prolonged, and the reliability of the luminous water hose is improved. In addition, the arrangement of the light-emitting guide lines is more flexible, so that different light-emitting effects are achieved, and market requirements are better met.

A toilet blank and a toilet bowl are disclosed, comprising a side blank, a main blank, and a connecting blank for the side blank and the main blank; the blank also includes several ribs, each with its two ends connected to the inner wall of the side blank and the first end of the connecting blank, and each rib extending from one side of the inner wall of the side blank to the other side along the first end of the connecting blank. Therefore, during the drying and firing process of the toilet blank, the frictional force and shrinkage force between the blank and the support plate are distributed on the ribs, resulting in stress concentration on the ribs, thereby reducing the forces acting on other parts of the blank, improving the stress condition of the toilet blank during drying and firing, reducing the possibility of blank cracking, and thus lowering production costs.

The utility model provides a permanent magnet brushless direct current spindle motor, and relates to the technical field of spindle motors, and a shaft body comprises a first shaft section, a second shaft section and a third shaft section of which the diameters are sequentially increased. And the first shaft section and the second shaft section are transited through a conical surface. A cutter mounting hole is formed in the third shaft section in the axis direction. The stator mounting seat is provided with a through hole used for sleeving the outer side of the shaft body. One end of the stator mounting seat is a mounting end and is mounted on the first shaft section through a first bearing, and the stator part is fixedly mounted on the outer circumference of the mounting end. The end part of the first shaft section is fixedly connected with the rear end cover, the rear end cover is connected with the outer rotor, and the outer rotor sleeves the outer side of the stator part. And one end of the stator mounting seat is a fixed end, and the fixed end is mounted on the second shaft section through a second bearing and is connected with the bearing end cover to fix the second bearing. The shaft body is of a three-section design, and the second shaft section and the first shaft section are in conical surface transition, so that the rigidity of the motor and the shaft body can be improved.

The present invention provides a single-cylinder anti-corrosion chimney, comprising a concrete support section and a steel structure cylinder section arranged from bottom to top; the inner wall of the steel structure cylinder section is provided with an anti-corrosion layer 1, the top of the concrete support section is provided with an ash accumulation platform connected to the anti-corrosion layer 1, the ash accumulation platform is provided with a mortar collection pit, and the bottom of the mortar collection pit is connected to the mortar collection pool inside the concrete support section through a mortar discharge pipe. The present invention also provides a construction method for a single-cylinder anti-corrosion chimney, including the steps of pouring a concrete construction section, laying a mortar discharge pipe and a mortar collection pool, preparing an annular corbel and an inspection platform by cast-in-place construction, pouring a conversion transition cylinder section, and installing a steel exhaust pipe section. The present invention combines the lower concrete support section and the upper steel structure cylinder section, which can give full play to the mechanical properties of the concrete structure and the steel structure. The steel structure cylinder section does not need to be additionally provided with a complex support structure, the construction process is simple, and the construction period is short.

The present invention relates to a method for monitoring the steam discharge pressure of a purification pump, comprising a volute, an impeller and a housing, wherein the upper end of the housing is connected to the volute, a rotating shaft is vertically arranged in the center of the motor inner cavity, a rotor is sleeved on the outer side of the rotating shaft, a stator fixed to the housing is installed on the outer side of the rotor, the upper end of the rotating shaft is connected to the center of the impeller in the negative pressure inner cavity, an air inlet pipe is vertically arranged at a position above the center of the impeller corresponding to the upper end of the volute, an air outlet pipe is arranged on the side wall of the volute along the tangent direction of the impeller, the upper and lower ends of the rotating shaft are respectively connected to the housing and the lower support plate through bearings, and a pressure sensor is installed on the outer side wall of the housing on one side of the air outlet pipe to detect the outlet pressure of the air outlet pipe. The present invention has a compact and reasonable structure, and the outlet pressure of the device and the leakage of the entire system can be monitored by adding a pressure sensor, which is low in cost and has good promotion value.

This utility model belongs to the field of contact sheet technology, and particularly relates to a contact sheet for a switch socket, including a fixing part, with a first extension part on both the left and right sides of the fixing part. The side of the first extension part is provided with a trapezoidal groove, one end of which abuts against the fixing part, and the other end of which is connected to a trapezoidal protrusion. A second extension part extends from the other side of the first extension part, and a first angle is formed between the first extension part and the second extension part, with the first angle ranging from 80° to 82°. A trapezoidal groove and a trapezoidal protrusion are mirror-image provided on one side of the second extension part. A support part is provided at the bottom of the fixing part, and a second angle is formed between the support part and the fixing part, with the second angle ranging from 95° to 97°. A contact part extends horizontally from the end of the support part in a direction parallel to the fixing part. A silver dot is provided at each of the left and right ends of the contact part, and the silver dot is fixed to the surface of the contact part by riveting.

The utility model discloses a support frame of a gas burner, which comprises a base (1), a support tube (2) is fixedly arranged on the base (1), a height adjusting component is rotatably mounted at the upper end of the support tube (2), a lifting screw (3) is in inserted and sliding connection with the support tube (2), and the lifting screw (3) is in threaded connection with the height adjusting component. And a gas burner tray assembly is fixedly arranged at the top end of the lifting screw rod (3). The gas burner can be effectively supported, the stress condition of the connecting flange of the gas burner is improved, and the stress of the connecting bolt is reduced.

The invention belongs to the technical field of cable hoisting, and particularly relates to a cable crane load-bearing cable force balance adjusting cable saddle device which comprises a cable saddle fixedly mounted at the top end of a tower and a plurality of load-bearing cables arranged on the cable saddle. The cable saddle comprises a supporting frame fixed to the surface of the tower, a first pulley block, a second pulley block and a third pulley block, the first pulley block, the second pulley block and the third pulley block are installed on the surface of the supporting frame and sequentially arranged in the length direction of the bearing cable, the second pulley block is fixedly installed on the surface of the supporting frame, and the center of the second pulley block and the center of the tower are located on the same vertical line. The first pulley block and the third pulley block are arranged on the surface of the supporting frame in a sliding mode in the length direction of the bearing cable, the first pulley block and the third pulley block are connected with first driving parts driving the first pulley block and the third pulley block to move, and the first driving parts are fixed to the surface of the supporting frame. The problem that the anti-overturning capacity of an existing cable tower frame is poor after the existing cable tower frame is subjected to resultant force applied by a bearing cable, a sports car and a hoisting component can be effectively solved.

The invention relates to the technical field of steel strip production and processing equipment, in particular to a strip steel deviation rectifying structure of a cold rolling production line, which comprises a base, conveying frames and passing rollers, the conveying frames are mounted at the front end and the rear end of the base, the passing rollers are rotatably connected in the conveying frames, and the strip steel deviation rectifying structure further comprises a folding mechanism, a deviation rectifying mechanism, a cleaning mechanism and the like, the folding mechanism is provided with deviation rectifying mechanisms used for transversely deflecting the steel belt, the folding mechanism is used for adjusting the distance between the deviation rectifying mechanisms, and the front-end conveying frame is provided with a cleaning mechanism used for cleaning the steel belt. By means of the folding mechanism and the deviation correcting mechanism, the steel belt can be kept stable in the conveying process, accurate fine adjustment can be conducted on the steel belt when needed, the situation that the steel belt cracks due to the fact that the single-time deviation distance is too large is avoided, and the quality of the steel belt in the deviation correcting process is guaranteed.

The invention discloses a drill pump multi-drag-one reduction gearbox which comprises a shell, a large gear and a gear shaft are arranged in the shell and meshed to form a gear pair, a motor mounting flange seat, a reduction gearbox mounting flange and a large gear supporting cover are fixed to the shell, and the large gear supporting cover is located on the outer side of one end face of the large gear. The two shaft ends of the large gear are provided with large gear supporting bearings, the shaft diameters of the two shaft heads of the gear shaft are unequal, and the two shaft heads of the gear shaft are provided with an input shaft supporting bearing I and an input shaft supporting bearing II respectively. According to the invention, the stress conditions of a gear pair, a supporting bearing and the like in the reduction gearbox are improved, and the universality of the reduction gearbox and the driving motor is also remarkably improved for drilling pump sets with different powers and different power requirements of the drilling pump sets.

The present invention provides a heavy-duty fishtail cutter for a shield machine, comprising a base, a main fishtail cutter plate, and two auxiliary fishtail cutter plates. The main fishtail cutter plate and the two auxiliary fishtail cutter plates are installed on the upper surface of the base, and the two auxiliary fishtail cutter plates are respectively located on both sides of the main fishtail cutter plate. A first cutter is arranged at intervals on the main fishtail cutter plate, and a second cutter is arranged at intervals on the auxiliary fishtail cutter plate. When the base rotates, the motion trajectories of the top centers of the first cutter and the second cutter are located on the same conical surface, and the accumulated motion trajectories of the first cutter and the second cutter cover the area swept by the main fishtail cutter plate. The heavy-duty fishtail cutter for a shield machine described in the present invention can not only share the force of the main fishtail cutter plate through the auxiliary fishtail cutter plate, reducing the risk of damage and fracture of the main fishtail cutter, but also the combination of the main fishtail cutter plate and the auxiliary fishtail cutter plate can cope with higher impacts, with high structural strength, strong rock breaking ability, and long service life.

This utility model discloses a front axle braking assembly, comprising a steering knuckle, a chamber bracket, a chamber, an adjusting arm, a camshaft, a camshaft bracket, and a brake. The chamber bracket, camshaft bracket, and brake are fixed on the steering knuckle, and the chamber is mounted on the chamber bracket. The camshaft is mounted on the camshaft bracket. The adjusting arm comprises a housing, a worm gear, a turbine, and an adjusting mechanism. The housing of the adjusting arm is connected to the chamber, and the turbine of the adjusting arm is connected to the camshaft. Its key feature is that the housing of the adjusting arm has an asymmetrical structure. Through the application of this asymmetrical design, the performance of the adjusting arm is enhanced without affecting the clearance between the adjusting arm and the chamber bracket. The reinforcement of the housing, worm gear, and turbine significantly improves the safety factor of the adjusting arm, ensuring the stable and reliable braking of the entire front axle throughout its entire lifespan.

The invention relates to the technical field of bridge pier reinforcing and limiting construction, and provides a connecting device for reducing bridge pier slippage aiming at the situation that a traditional bridge pier close to a cofferdam is prone to slippage due to excavation of a cofferdam soil mass, the connecting device is characterized in that the connecting device comprises two connecting rings, and the two connecting rings are arranged on the peripheries of the two adjacent bridge piers in a sleeving mode; each connecting ring is formed by splicing a plurality of arc-shaped box bodies; the close ends of the adjacent arc-shaped box bodies are connected through a connecting assembly. And a plurality of connecting rods are further arranged between the two connecting rings, and the two ends of each connecting rod are fixedly connected with the opposite sides of the two connecting rings through connecting pieces correspondingly. The method has the effect of limiting the piers close to the cofferdam from sliding easily due to excavation of the soil body of the cofferdam.

The present invention provides a compression structure for a rotary compressor, a rotary compressor, and an air conditioner, which relate to the technical field of compressors and solve the technical problem in the prior art that the force exerted by the gas on the high-pressure side on the vane is much greater than the force exerted by the gas on the low-pressure side on the vane. The compression structure for a rotary compressor includes a flange having a guide channel and a vane having a stress-bearing slot hole, wherein the guide channel and the stress-bearing slot hole are connected, and the high-pressure refrigerant can flow to the stress-bearing slot hole through the guide channel, and the inner side wall of the stress-bearing slot hole is subjected to the combined force of the high-pressure refrigerant in a direction perpendicular to the vane toward the high-pressure side of the vane. The present invention is used to improve the stress condition of the vane to improve the performance of the compressor.

The invention belongs to the technical field of metal casting, and particularly relates to a device for centrifugal casting of a special-shaped cast pipe and a casting method.The device comprises an outer pipe, end covers located at the two ends of the outer pipe and a mold arranged in the outer pipe, the mold comprises a mold cylinder, and spring wedge blocks are distributed in the circumferential direction of the inner wall of the mold cylinder at the positions, with creases, of the inner wall of the mold cylinder. In the centrifugal process after casting, due to the influence of thermal expansion and cold contraction, the cast pipe can contract towards the axial center of the cast pipe and can be stressed to deform and even break at the edge fold part, the spring wedge block is arranged on the inner wall of the die barrel to move in a certain small range distance, the force enabling the edge fold part to deform and even break due to stress is absorbed, and the casting effect is improved. The stress condition of the edge fold part is improved, the complete special-shaped cast pipe is prepared, cracks are reduced, and the cast pipe is prevented from being broken.

The invention discloses a roller mechanism of a flat knitting machine, which is composed of a pair of rollers in bilateral symmetry, each roller comprises a thicker lower roller and a thinner upper roller, the peripheries of the two rollers are provided with tensioned roller leather, the upper roller and the lower roller are wrapped in the roller leather, and when the lower roller rotates, the roller leather is driven to rotate; at least one end of the two lower rollers is provided with an opening and closing mechanism, the opening and closing mechanism comprises a pair of eccentric gears which are meshed with each other, and each eccentric gear is eccentrically arranged on one lower roller; the two eccentric gears are fixedly connected with coaxial limiting wheels respectively, and limiting plates fixed to the rack are arranged on the two sides of the limiting wheels and tangent to the limiting wheels. When the eccentric gear rotates, the circular motion of the lower roller on a smaller radius is reflected in a pair of rollers, namely the opening and closing motion of the rollers. The opening and closing movement of the device is rapid in action and free of hysteresis in the whole process.

The present invention discloses a frame structure with an anti-seismic reinforcement device, which belongs to the field of anti-seismic reinforcement. It includes a frame structure and an anti-seismic reinforcement device, and the anti-seismic reinforcement device includes a connecting column, a self-resetting damper assembly, a horizontal support beam and two support rods; the self-resetting damper assembly is fixedly connected to the connecting column, the bottom of the connecting column and the self-resetting damper assembly are connected to the top of the horizontal support beam, and the bottom left and right sides of the horizontal support beam are respectively connected to the tops of the support rods on the left and right sides; the top of the connecting column is connected to the upper frame beam through an upper connecting structure, and the bottoms of the support rods on the left and right sides are connected to the beam-column node at the bottom of the frame structure through a lower connecting structure, and the upper connecting structure and the lower connecting structure are both assembled and detachable connecting structures. The present invention is convenient and quick to construct, the system has strong and stable energy consumption, simple maintenance, self-resetting ability, and the self-resetting damper can be reused, which effectively improves the anti-seismic performance of the original frame structure.