35results about How to "Avoid premature failure" patented technology

The invention relates to a dynamic balance control method between multi-cluster parallel battery clusters, a controller, a multi-cluster parallel battery cluster system and an energy storage system. The method comprises the following steps: acquiring the voltage of each battery cluster; under the condition that the voltage difference value of any two battery clusters is smaller than or equal to a first voltage threshold value, the voltage average value of each battery cluster is determined; if the target battery cluster exists, the working state of a first converter connected with the target battery cluster is controlled according to the difference value between the voltage of the target battery cluster and the voltage average value, so that the target battery cluster is charged or discharged until the difference value between the voltage of any battery cluster and the voltage average value is smaller than or equal to a second voltage threshold value; wherein the difference value between the voltage of the target battery cluster and the voltage average value is greater than the second voltage threshold value, and the first voltage threshold value is greater than the second voltage threshold value. By adopting the method, the balance among the battery clusters can be effectively realized, and the service life of the energy storage system is prolonged.

A layout design method of a shield tunneling machine cutter comprises the steps that based on a statistical method and in combination with multiple sample data, the interlayer abrasion uniformity of a shield tunneling machine cutter head is determined; based on the interlayer abrasion uniformity of the shield tunneling machine cutterhead, the vertical layout of the shield tunneling machine cutterhead is determined; a finite element model of the single-layer shield tunneling machine cutterhead is established, the mechanical parameters of the shield tunneling machine cutterhead and the characteristic parameters of the plane layout serve as model input of the finite element model, and the in-layer abrasion uniformity serves as simulation output of the finite element model; and based on the in-layer abrasion uniformity of the shield tunneling machine cutterhead, the plane layout of the shield tunneling machine cutterhead is determined. According to the method, the plane layout and the vertical layout of the shield tunneling machine cutterhead are researched in detail, and the in-layer abrasion uniformity and the interlayer abrasion uniformity are emphatically optimized, so that the total abrasion loss is effectively reduced, the service life of the cutterhead is prolonged, and the tunneling efficiency of the cutterhead is improved.

The invention discloses a femtosecond laser strengthening method for improving the surface integrity of a laser cladding high-temperature alloy, and belongs to the technical field of laser cladding postprocessing, and the femtosecond laser strengthening method comprises the following steps: S1, selecting a proper high-temperature alloy as a base material, and cleaning and pretreating the surface of the base material; s2, a cladding laser is started to clad the base material; S3, a femtosecond laser system is set, and the optimal light beam quality and energy density are obtained; according to the method, the cladding surface is strengthened through femtosecond laser, the defects of cracks, air holes and the like appearing on the material surface after laser cladding are effectively removed, the surface integrity is greatly improved, premature failure caused by the problems of stress concentration and the like in the using process of components can be prevented through elimination of the surface defects, the service life of the components is prolonged, and the production cost is reduced. The safety and stability of the key hot end component are guaranteed, and the surface integrity of the high-temperature alloy component can improve the service performance and reliability under extreme loads such as high temperature, high flow speed and high pressure in the fields of aerospace and the like.

The invention provides a preparation method of a thermal barrier coating alpha-Al2O3 thermal growth oxide, and belongs to the technical field of surface engineering. The preparation method comprises the following steps: preparing the MCrAlY bonding layer on the surface of a sample; the surface of the MCrAlY bonding layer is cleaned; raising the temperature to a first preset temperature at a heating rate of 50-80 DEG C / s, performing first heating treatment on the cleaned MCrAlY bonding layer, and generating an alpha-Al2O3-based TGO film with a first thickness on the surface of the MCrAlY bonding layer; and cooling to a second preset temperature, and carrying out secondary heating treatment on the MCrAlY bonding layer, so that the alpha-Al2O3-based TGO film on the surface of the MCrAlY bonding layer continuously grows to a second thickness. According to the method, the rapid heating and segmented heat treatment technology is adopted, the thermal barrier coating with the alpha-Al2O3 thermal growth oxide can be produced and prepared in the atmospheric environment, the process is simple, the implementation difficulty is low, and the production cost is low; and meanwhile, the thermal growth stress is reduced, the coating is effectively prevented from premature failure, and the technical requirement for pre-oxidation of the thermal barrier coating of the gas turbine blade is met.

The invention provides an electrochromic diaphragm, a color changing device and a terminal product, and belongs to the technical field of electrochromism. The electrochromic membrane comprises a central part and an edge part adjacent to the central part, and the edge part is electrically connected with a bus bar; at least partial area of the edge part is provided with a blocking part, and conduction of current of the bus bar from the blocking part to the central part is blocked or reduced through the blocking part. The blocking part is correspondingly arranged in the partial area of the edge of the electrochromic membrane, and the current of the bus bar is blocked or reduced from being conducted to the central part of the electrochromic membrane from the blocking part through the blocking part, so that the current is prevented from being directly conducted to the conductive layer of the central part from the conductive layer provided with the blocking part; or the current conducted from the conducting layer provided with the blocking part to the conducting layer of the central part is reduced, so that the failure caused by over-charging or over-discharging in the corner area of the electrochromic diaphragm is avoided, the stability and the uniformity of the electric field intensity of the electrochromic diaphragm are improved, and the service life of the electrochromic diaphragm is prolonged.

The utility model relates to the technical field of operation machinery, and discloses a ladder stand device, a crane and operation machinery. The first crawling ladder assembly is arranged on the mounting seat in a swinging manner; the first crawling ladder assembly and the locking assembly are arranged on the mounting base, the first crawling ladder assembly can swing, and when an operator needs to control the operation table, the first crawling ladder assembly is swung downwards to be in an unfolded state and is fixed through the locking assembly. At the moment, the first crawling ladder assembly is obliquely arranged relative to the ground, so that an operator can easily climb upwards along the first crawling ladder assembly, and when the first crawling ladder assembly is not used, the first crawling ladder assembly is swung upwards to be in a storage state and is fixed through the locking assembly; at the moment, the space occupied by the first ladder stand assembly is small, and the width size of the vehicle body cannot be increased.

The utility model discloses a manual valve with electric drive part can install, the utility model relates to valve technical field, including valve body subassembly and assembly subassembly, the valve body subassembly includes valve body, be provided with the mounting cover on the valve body, be provided with valve stem on the mounting cover, the top of valve stem even has been seted up recess, has been seted up screw hole on the valve stem, through setting recess and screw hole on the valve stem, the positioning is convenient to the axle body, sets up bolt no.

The invention discloses a relay control method based on temperature induction. The relay control method comprises the following steps: acquiring electrical equipment protected by a relay to obtain a current current value; obtaining a current-time limit mapping relation; determining an initial countdown time limit corresponding to the current current value based on the current current value and a current-time limit mapping relation; acquiring the current working temperature of the relay to obtain a current temperature value; calculating a final countdown time limit based on the current temperature value and the initial countdown limit; and controlling the relay to trip based on the final countdown time limit. Therefore, the inverse time limit characteristic and the temperature protection are organically combined, more accurate, reasonable and efficient overcurrent protection can be carried out, and the adaptability of the system to a complex operation environment is enhanced.

This invention belongs to the field of engineered wood products manufacturing, specifically a method for preparing low-formaldehyde finger-jointed boards based on bio-based modified adhesives. The method includes preparing an adhesive composed of modified soybean protein, non-formaldehyde crosslinking agents, micro / nano cellulose, nano-silica, and epoxidized vegetable oil elastomers; pre-treating the wood and cutting the finger joints; applying a sealing liquid via atomization for end-face damping treatment; performing quantitative adhesive application and stepped butt joint molding; and employing a multi-stage hot-pressing process involving preheating penetration, high-temperature curing, and cooling and pressure holding. Through the above technical solution, this application can achieve the formation of a dense adhesive film at the finger joint interface, significantly improving bonding strength and stability while reducing formaldehyde release.

The invention discloses a marine square pile with an anti-erosion structure, which is applied to the field of concrete building materials, and realizes that when metabolite of marine organisms excessively erodes an anti-erosion column, the anti-erosion column can be locally stripped, so that the marine organisms and the local part of the anti-erosion column are integrally separated from the anti-erosion column; the anti-erosion column and the square pile body are prevented from being excessively eroded by marine organisms, the structural strength of the square pile body is not prone to being affected, meanwhile, after the anti-erosion column is locally stripped, seawater flows into the anti-erosion cavity to dissolve the filling salt block, and under the effect of a relatively-closed three-dimensional space structure formed by the elastic fibers, the anti-erosion column and the square pile body are separated from each other. The release speed of high-salinity seawater dissolved with filling salt blocks is greatly slowed down, high-concentration salt water is released for a long time at stripped notches, marine organisms are repelled, excessive biological erosion is prevented from being locally generated on the anti-erosion column, and the anti-erosion column is not prone to failure in advance.

The present invention relates to a high-strength PP plastic and a preparation method, and belongs to the technical field of polypropylene materials. The preparation method mainly includes the preparation of a polyphenylene sulfide solution, the preparation of a polyphenylene sulfide fiber loaded with modified nano-silicon dioxide, and finally the melt extrusion of various materials, thereby obtaining a high-strength PP plastic. The present invention loads the modified nano-silicon dioxide on the polyphenylene sulfide fiber, and cooperates with components such as γ-chloropropyltrimethoxysilane and maleic anhydride grafted polypropylene resin to jointly improve the performance of the polypropylene material, and enhances the cross-linking structure between molecular chains through chemical bonding and physical entanglement, thereby enhancing the interface compatibility and stress transfer efficiency, significantly improving the strength of the material, and optimizing the overall performance of the material.

This invention discloses a tensile-strength steel-cored aluminum stranded wire, relating to the technical field of steel-cored aluminum stranded wire. The tensile-strength steel-cored aluminum stranded wire of this invention comprises at least: a steel core; a Zn-Ni-WC composite coating, electroplated on the steel core; aluminum strands, stranded on the steel core coated with the Zn-Ni-WC composite coating; and an anti-corrosion coating applied to the stranded aluminum strands. The anti-corrosion coating comprises the following raw materials in parts by weight: 60-70 parts of long-chain modified polyurethane acrylate prepolymer; 25-30 parts of acrylate isoborneol ester; 15-20 parts of dopamine-modified sustained-release microcapsules; 2-5 parts of photoinitiator; 0.5-1.5 parts of leveling agent; and 0.5-1.5 parts of dispersant. This invention, by setting a Zn-Ni-WC composite coating on the steel core and an anti-corrosion coating on the steel-cored aluminum strands, enables the prepared tensile-strength steel-cored aluminum stranded wire to possess superior corrosion resistance and ultra-long-term tensile strength retention.

The present invention relates to a long-life hybrid drill bit, which comprises: a drill bit body; a tooth palm, one end of which is fixed to the drill bit body, and the other end of which is equipped with a roller, and the surface of the roller is fixed with an outer row of teeth; a support structure, which is located on one side of the roller, and the outer side surface of the support structure is provided with a first cutting tooth, and the support structure and the first cutting tooth are used to protect the outer row of teeth of the roller, the back cone and the palm tip of the roller; and a wrapping structure located on the other side of the roller, and the wrapping structure is used to protect the outer row of teeth of the roller, the back cone and the palm tip of the roller, and at least one of the wrapping structure or the support structure is arranged on one side of the roller. The present invention relates to a long-life hybrid drill bit, and the support structure or the wrapping structure can support and share the force of the outer row of teeth, back cone and palm tip of the roller, effectively avoiding direct wear of the outer row, back cone and palm tip of the roller by the well wall or the bottom of the well, and avoiding premature failure of the roller seal.

The invention discloses a wind power gear box lubricating system, and relates to the technical field of wind power generation, the wind power gear box lubricating system comprises a mechanical pump arranged on one side of a gear box, and a gear box output shaft is arranged on the side, close to the mechanical pump, of the gear box; a mechanical pump input shaft in transmission connection with the gearbox output shaft is arranged on the side, close to the gearbox, of the mechanical pump, and a speed increasing assembly is connected between the mechanical pump and the gearbox and comprises a box body; the speed increaser input shaft is arranged on the box body and is in transmission connection with the gearbox output shaft; the speed increaser output shaft is arranged on the box body and is in transmission connection with the mechanical pump input shaft; the speed increasing gear train is arranged in the box body and is connected between the speed increaser input shaft and the speed increaser output shaft; the input rotating speed of the mechanical pump is effectively increased, so that the flow of the mechanical pump is increased, enough oil is provided for each part of the gear box for lubrication, and the problem that the gear box fails in advance is avoided.

This utility model relates to the field of aerogel felt technology and discloses a plug-in aerogel felt board, characterized in that it includes an insulation layer, a reinforcing mesh, and several snap-fit ​​components. The insulation layer includes aerogel felt, and the snap-fit ​​components include a fixing seat and a plug. The fixing seat is inserted into the aerogel felt and located at one end of the insulation layer. The end of the fixing seat located inside the aerogel felt is provided with several locking blocks. The plug is inserted into the aerogel felt and located at the end of the insulation layer away from the fixing seat. The end of the plug near the locking blocks has a stepped groove that can engage with each locking block. The reinforcing mesh is wrapped around the insulation layer. The outer wall of the reinforcing mesh is coated with cement mortar or organic adhesive to form a wrapping layer, or the outer wall of the reinforcing mesh is wrapped with an air-barrier membrane to form a wrapping layer. Wrapping the outer wall of the reinforcing mesh with a wrapping layer can effectively reduce dust shedding caused by the loose structure of the aerogel felt during use, thus avoiding dust pollution and preventing the aerogel felt itself from being damaged, which would lead to a decrease in insulation performance.

The embodiment of the invention provides a flash memory management method, which comprises the following steps of: dividing a flash memory space according to a preset rule to obtain a plurality of first to-be-stored areas; using the plurality of first to-be-used areas according to a time division multiplexing rule; recording the use times corresponding to the plurality of first to-be-used areas; when the number of use times corresponding to the first to-be-used area reaches a preset value, dividing the flash memory space again to obtain a plurality of second to-be-used areas; and using the plurality of second to-be-used areas. According to the scheme, the use frequency of each region is balanced, so that early failure of some regions due to excessive wear is avoided, and the total service life of the flash memory is prolonged. And the flash memory space is re-divided, so that the risk of data error and loss caused by abrasion is reduced, and the data reliability is improved. The invention further provides flash memory management equipment corresponding to the flash memory management method. The flash memory management equipment has the beneficial effects corresponding to the flash memory management method.

The present invention discloses a non-welded lift valve driven by a brushless linear motor, comprising a valve body with a hollow cavity inside, an air inlet and an air outlet at the bottom of the valve body; a brushless linear motor is arranged at the top of the valve body, and the output shaft end of the brushless linear motor is connected to a center rod and a valve core riveted to the bottom end of the center rod through a transition connection structure; the transition connection structure comprises a drive block fixed to the output shaft end of the brushless linear motor and a coupling matched with the drive block and riveted to the center rod. The present invention adopts a brushless linear motor as the actuator power source, which simplifies the design structure. The center rod and the valve core are riveted and fixed, and the coupling and the center rod are riveted and fixed, which avoids the risk of weld falling off caused by welding; the output shaft of the brushless linear motor is connected to the center rod by a coupling and a drive block, and the brushless linear motor will not be damaged during the assembly process.

The application discloses a prefabricated optical cable fiber connector mechanical performance enhancement system of a smart substation, relates to the technical field of optical communication of the smart substation, and comprises a data acquisition module, an environmental stress modeling module, a risk simulation module and a strategy fusion module. The system collects connector parameters and in-station environmental data, constructs a comprehensive stress model, analyzes vibration interference spectrum and natural frequency by using a modal matching device, generates a resonance avoidance strategy, analyzes periodic thermal stress and connector structure by using a thermodynamic simulator, generates a deformation compensation scheme, and finally fuses and outputs a composite enhancement strategy. The system can accurately predict and avoid the resonance risk of the connector and a specific electromagnetic vibration source, effectively compensate the cumulative deformation caused by the periodic thermal stress, and thus improve the long-term mechanical reliability and optical transmission stability of the connector in a complex in-station environment before deployment.

The invention relates to the technical field of electronic control devices, in particular to a contact part and a relay. The contact part is provided with at least two parallel branches which are arranged in the same current path in parallel, each parallel branch is provided with a contact group, and each contact group comprises a movable contact and a static contact; at least two of the parallel branches form an alternating group; in the alternating groups, the movable contact and / or the static contact of each contact group comprises at least two electric contact layers, and each electric contact layer is arranged along the height direction of the corresponding movable contact or static contact.

The present invention discloses a low-capacitance unidirectional ESD protection device, wherein a P-type reverse doping region, a P+ diffusion region, and an N+ diffusion region are arranged on the front of a P-type material; a deep energy level impurity doping region is arranged on the N+ diffusion region; and a dielectric layer is arranged between two adjacent P+ diffusion regions and between two adjacent N+ diffusion regions. An anode and a cathode metal layer are arranged on the dielectric layer, respectively. A method for manufacturing a low-capacitance unidirectional ESD protection device comprises the following steps: 1. preparing a P-type material. 2. growing a sacrificial oxide layer, and arranging a P-type reverse doping region on the front. 3. arranging a P+ diffusion region and an N+ diffusion region on the front. 4. photolithography to form a deep energy level doping region on the front. 5. removing the sacrificial oxide layer, depositing a dielectric layer, and photolithography to form contact hole regions of the cathode and the anode on the front. 6. photolithography to form an anode metal layer and a cathode metal layer on the front. The present application realizes low capacitance to meet the requirements of high-speed interfaces, and avoids premature breakdown of surface voltage and premature failure during current discharge.

The invention relates to the technical field of UV (ultraviolet) moisture curing adhesives, and discloses an LED (light-emitting diode) UV moisture curing adhesive and a preparation method thereof. 10%-30% of a reactive diluent; 1% to 5% of an LED photoinitiator; 2%-8% of a photoinduced latent moisture curing catalyst; 0.5%-2% of a chemical dewatering agent; 1%-6% of a functional auxiliary agent; wherein the sum of the mass percentages of all the components is 100%. A main chain of the dual-cured polyurethane acrylate resin is a polyurethane chain segment, and an acryloyloxy group and an alkoxy silane group are grafted on a molecular chain at the same time. According to the invention, an active linkage mechanism of light curing and moisture curing is constructed, so that illumination not only completes instant shaping of a surface layer, but also activates a high-activity moisture curing catalyst for a deep layer or a shadow area, so that a subsequent moisture curing reaction does not completely depend on natural permeation of environmental humidity any more, and the moisture curing effect is improved. And the reaction rate of internally curing the shadow region is obviously improved.

This invention discloses a method and system for monitoring and controlling the temperature of a liquid-cooled plate, belonging to the field of liquid cooling control. The method includes: acquiring operating parameters of multiple independent cooling loops; calculating, based on the operating parameters, the ideal coolant flow rate required for each cooling loop to reach a preset target outlet temperature under the current heat load; obtaining a heat dissipation efficiency index by comparing the ideal coolant flow rate with the actual coolant flow rate; differentially adjusting the cooling intensity of each cooling loop according to its heat dissipation efficiency index; monitoring the changing trend of the heat dissipation efficiency index of each cooling loop, and issuing early warnings based on the changing trend. This invention solves the problems of coolant performance degradation, decreased heat dissipation efficiency due to flow channel fouling, and increased risk of localized overheating in existing liquid cooling systems during long-term operation, thereby improving the operational reliability of the liquid cooling system.

The invention relates to the technical field of digital twinning, in particular to a digital twinning-based wind turbine generator full life cycle management system, which comprises a deformation parameter resolving module, a skeleton driving reconstruction module, a load damage calculation module, a health difference evaluation module and a balance control decision module. According to the method, the instantaneous curvature and the torsion rate are calculated by collecting cross section wavelength drift data, the dynamic bending posture of the flexible part in the space is reconstructed in real time, continuous tracking of stress circulation and a closed lag loop is achieved by combining pneumatic simulation and the residual peak-valley sequence stack technology, the accumulated damage degree of the part in the whole service cycle is accurately quantified, and the reliability of the part is improved. By analyzing the discrete deviation of individual damage relative to a group mean value, an asymmetric load distribution mechanism based on health state difference is established, the fatigue extension trend of high-damage parts is effectively relieved, premature failure caused by uneven load distribution is avoided, and life balance and collaborative life extension of key parts of a unit in the whole life cycle are achieved.

The utility model provides a kind of bearing assembly, gear box and wind generating set, the bearing assembly is used to be installed between first component and second component relatively rotating, the bearing assembly includes: bearing inner ring, for with the first component engagement;Bearing outer ring, can rotate relative to the bearing inner ring and is used to with the second component engagement;And elastic component, including at least one of first elastic component and second elastic component, wherein, the first elastic component can be located between the radial outer surface of the bearing outer ring and the second component, the second elastic component can be located between the radial inner surface of the bearing inner ring and the first component.Bearing assembly according to the utility model can absorb or compensate local load in radial direction, can prolong the service life of bearing, prevent its premature failure.

The invention relates to the technical field of resource regeneration, in particular to an antibacterial regenerated PET elastic fiber and a preparation method thereof. The preparation method comprises the following steps: adding hexamethylenediamine and 1-methyl-1H-imidazole-2-formaldehyde to obtain an antibacterial material; loading an antibacterial material into the modified zirconium hydrogen phosphate material to obtain a modified antibacterial material; and mixing the modified antibacterial material, disodium ethylene diamine tetraacetate, copper sulfate pentahydrate, a sodium hydroxide solution and an ascorbic acid solution to obtain the composite antibacterial material. Mixing the regenerated PET powder, a composite antibacterial material, an inorganic pigment, an auxiliary agent and propylene glycol, and performing high-temperature melting, local cooling, vacuum drying, double-helix melting, granulation and melt spinning to obtain PET elastic fibers; and finally, dipping the PET elastic fiber in the TiO2 solution to obtain a finished product. The finished product prepared by the invention has good antibacterial property and mechanical property, so that the finished product has a wide application prospect in the technical field of resource regeneration.

The application provides a kind of optical storage system cluster SOH equalization control method, device and electronic equipment, belong to energy storage technical field.The method includes determining the SOH average value and SOH standard deviation of the optical storage system cluster according to the SOH data of all energy storage subsystems, in the case where the SOH standard deviation is greater than or equal to a preset value, the SOH data of each energy storage subsystem is compared with the sum of the SOH average value and the SOH standard deviation, the corresponding power allocation strategy is determined according to the comparison result and the power allocation is carried out according to the power data.The application takes SOH standard deviation as a key decision indicator, dynamically switches the optical storage system cluster from "non-discriminatory working mode" to "differentiated protection mode", delays the decay rate of all energy storage subsystems, and prolongs the average life and discharge capacity of the entire cluster throughout the life cycle.

The application relates to a vanadium flow battery energy storage power distribution method, device and system, and relates to the technical field of energy storage energy management. The method comprises the following steps: performing online parameter identification processing on an acquired equivalent loss model to determine battery identification parameters of a plurality of battery groups; determining the health states of the plurality of battery groups according to the battery identification parameters, original battery resistances and resistance values at a time of scrapping; determining the charging and discharging priorities of the plurality of battery groups according to the battery states of charge and the health states; selecting a plurality of target battery groups participating in power distribution from the plurality of battery groups according to total scheduling demand power and the charging and discharging priorities; determining a multi-objective function with the minimum battery working loss, the minimum state of charge uniformity and the minimum total life loss as targets according to the battery identification parameters and the battery states of charge, and constructing a multi-objective optimization model; and solving the multi-objective optimization model based on constraint conditions to obtain target power distribution results of the plurality of target battery groups.

The invention relates to a method for discovering and eliminating errors within a mapping process, the method being configured to transform an input file (IDB) into a map based on a transform instruction. Furthermore, the invention relates to a computer program and a storage medium.

This invention relates to the field of gearbox technology, and in particular to a gear shifting control system for a gearbox, comprising a flexible shift fork mechanism, a shift guide drum, a shifting control gear set, and a shifting control mechanism. The flexible shift fork mechanism includes a shift fork seat, a shift fork arm rotatably connected to the shift fork seat, and an elastic element for driving the shift fork arm to reset. When the shift fork arm swings relative to the shift fork seat, the elastic element drives the shift fork arm to reset. A shift guide groove is provided on the circumferential surface of the shift guide drum, and a shift fork protrusion is provided on the upper part of the shift fork seat, the shift fork protrusion being movably disposed within the shift guide groove. This invention uses a rotatable connection between the shift fork arm and the shift fork seat, resulting in low friction, more flexible shifting, and a longer service life for the elastic element. Furthermore, it effectively avoids damage to the ratchet teeth caused by ratchet grinding, jamming, or forced pulling, effectively extending the service life of the elastic element, the gear shifting control system, and the gearbox itself.

The utility model discloses a kind of inner concave connecting joint applied to umbrella structure, including the connecting joint of the special-shaped steel column upper end being set to the lower part of umbrella structure, the connecting joint includes inner support part and outer support part, inner support part is connected with the round steel column of special-shaped steel column, outer support part is annular dentiform structure and is evenly distributed in the circumferential direction of inner support part, outer support part lower end is connected with the box room column of round steel column outer side, upper end is connected with the main beam of umbrella structure, outer support part is located at the outer side of inner support part and jointly constitutes funnel shape, the bottom surface and top surface of outer support part are inclined upward conical part, outer support part lower end vertical part, vertical part is connected between the conical part of outer support part by smooth arc part.The utility model can improve the bending resistance and support stability of connecting joint.