259 results about "Solid component" patented technology

The invention discloses a magnesium reinforced porcelain black underglaze coloring agent as well as a preparation method and application thereof, and belongs to the technical field of underglaze coloring agents. The magnesium porcelain reinforced porcelain black underglaze coloring agent comprises the following solid components in percentage by weight: 12-15% of potassium feldspar, 9-15% of albite, 9-12% of calcite, 11-15% of quartz, 16-20% of kaolin, 1-1.2% of methyl cellulose and 31-34% of cobalt black pigment. Wherein the weight content of K2O in the potassium feldspar is greater than or equal to 10%; the weight content of Al2O3 in the kaolin is greater than or equal to 37%; and the weight content of Co3O4 in the cobalt black pigment is 15-25%. The prepared black underglaze coloring agent can be well suitable for a magnesium reinforced porcelain body and a cover glaze of a low-temperature fritted glaze, an obtained black underglaze product is full and pure in color development, the blue bleaching phenomenon does not occur after decoration firing, and meanwhile the glaze surface is free of orange color and pinholes.

The present invention provides a method for producing lithium hydroxide, comprising the steps of reacting lithium carbonate and calcium hydroxide in a liquid to obtain a solution containing lithium hydroxide, and performing solid-liquid separation on the solution into a liquid component containing lithium hydroxide and a solid component containing lithium derived from the lithium carbonate, and recovering lithium hydroxide from the liquid component.

To provide a solid composition which achieves both a low dielectric constant and a low coefficient of linear expansion.SOLUTION: A solid composition contains a fluorine resin, and a fibrous anisotropic filler, where a reduction rate of a coefficient of linear expansion at 20°C to 200°C of the solid composition to a coefficient of linear expansion at 20°C to 200°C of the fluorine resin is 50% or more.SELECTED DRAWING: None

According to the metal stirring friction additive manufacturing technology and the component for controlling the precipitated phase through full-process deep cooling, in the technology, full-process deep cooling control in the aluminum alloy metal bar machining process is kept, the aluminum alloy metal bar is in a supersaturated solid solution state all the time, and therefore the precipitation phase is controlled; a temperature control system is directly applied through a stirring friction solid-phase additive stirring main shaft system, and stirring friction additive machining of metal bars is achieved under the combined action of a deep cooling temperature control environment and rotating stirring friction of a stirring friction machining head. A large number of dislocation structures introduced by strong plastic deformation in the rotary stirring friction additive machining process are combined, and the interior of an additive forming structure is rich in a large number of dislocation entanglement network structures. And a large number of precipitated phases are promoted to be uniformly precipitated in the structure, the target of controllability of the material temperature and the structure in the additive manufacturing process is achieved, the structure of the machined and formed metal 3D entity component is optimized, and the mechanical property of the metal 3D entity component is improved.

The invention relates to the technical field of functional polymer materials, in particular to an inorganic crystal carbonization alleviator as well as a preparation method and application thereof. The inorganic crystal carbonization alleviator is prepared from raw materials including a solid component and a liquid medium, wherein the mass ratio of the liquid medium to the solid component is (1: 0.5)-(1: 3); the solid component comprises a component containing calcium carbonate and / or calcium silicate and a component containing silicon dioxide, and the mass ratio of the component containing calcium carbonate and / or calcium silicate to the component containing silicon dioxide is (50-80): (20-50). According to the inorganic crystal carbonization alleviator, the calcium silicate mineral is prepared from the calcium carbonate-containing and / or calcium silicate-containing material and the silicon dioxide-containing material, the carbonization resistance of the material is remarkably improved, and the inorganic crystal carbonization alleviator has the advantages of being wide in raw material source and low in cost and can improve and enhance the carbonization resistance when being applied to Portland cement and hypersulfate cement systems.

The invention provides a method for preparing high-quality oil from plastic. The method comprises a heating pyrolysis gasification stage and a gas phase catalytic modification stage, in the heating pyrolysis gasification stage, waste plastics are placed in a reaction container to be subjected to high-temperature heating pyrolysis to generate gaseous substances, and in the gas phase catalytic modification stage, the gaseous substances are introduced into a modification device to be subjected to catalytic modification to obtain high-quality oil; according to the method, pyrolysis is performed firstly, and then catalytic upgrading is performed, so that compared with direct catalytic pyrolysis, the dosage of a catalyst is reduced, and the cost is saved. The catalyst is not in direct contact with the waste plastic, the service life of the catalyst can be prolonged, separation, recovery, activation and recycling of the catalyst are facilitated, meanwhile, collection and subsequent conversion and utilization of solid components generated by first-step pyrolysis are facilitated, and maximum utilization of waste plastic resources is achieved.

The invention relates to the technical field of lithium batteries, in particular to a conductive polymer, a multifunctional quasi-solid elastomer electrolyte and a preparation method and application thereof. The preparation method comprises the following steps: synthesizing a new conductive polymer by taking two of an alkenyl-containing lithium ion conductive monomer, an alkenyl-containing polymerizable lithium salt and an alkenyl-containing monomer capable of generating an irreversible chemical reaction with an amino group as monomers, and then coating glass fibers with a cross-linking solution of the conductive polymer as a solid component. LiPF6 is dissolved in a plasticizer composed of MDFA and FEC to serve as a liquid component, and then the liquid component swells a solid component, so that the quasi-solid elastomer electrolyte is obtained. The quasi-solid elastomer electrolyte has the characteristics of flame retardance, low temperature resistance and HF inhibition, can meet the requirement of a lithium metal battery for working at a low temperature, and has important significance for solving the problems of insufficient endurance mileage and potential safety hazards of an electric vehicle in winter.

Provided: A curable resin laminate with low dielectric properties, capable of easily fabricating an insulating layer with excellent adhesion (peel strength) to the conductor layer. A curable resin laminate comprising: a first resin layer formed of a first curable composition; and a second resin layer laminated on the first resin layer and formed of a second curable composition, the second resin layer having a thickness of 5-35% relative to the total thickness of the first and second resin layers, the first curable composition comprising (A1) polyphenylene ether and filler, wherein the filler content (M) as a total solid component is... B1 The content of the second curable composition is 30% or more by mass, and the content of the filler as a solid component is (M). B2 () is less than 40% by mass, which is M B1 >M B2 The slopes of (A1) and (A2) calculated from the conformation diagrams are less than 0.6.

The invention discloses oxide solid electrolyte nanoparticles, a preparation method of the oxide solid electrolyte nanoparticles and application of the oxide solid electrolyte nanoparticles in a positive plate for an oxide solid electrolyte-based low-temperature battery. The oxide solid electrolyte nanoparticles are prepared by adding a novel amphiphilic molecule dispersing agent in a sanding process to realize perfect dispersion; the effect of stabilizing the nano particles is achieved; the amphiphilic molecular dispersing agent is alkane amidoxime; the positive plate comprises the following solid components; the solid component comprises a multifunctional polymer adhesive; the multifunctional polymer has at least two or more functional groups of a carboxylic acid group, a sulfonic acid group and an amidoxime amine group. According to the oxide solid electrolyte nanoparticle, the preparation method thereof and the positive plate for the oxide solid electrolyte-based low-temperature battery disclosed by the invention, the problem of agglomeration in the preparation process of the nanocrystallization solid electrolyte nanoparticle can be effectively solved, and a battery product with high stability and high low-temperature performance is obtained.

The invention relates to a chromium-free environment-friendly insulating coating paint and a thin electrical steel strip. The chromium-free environment-friendly insulating coating comprises the following components in percentage by mass: 15%-23% of phosphate; 8%-13% of epoxy resin emulsion; 0.3%-1.2% of boric acid; 0.4%-4.7% of a metal inorganic salt additive; 0.3%-1.1% of a metal hydroxide; 0.1%-0.44% of a coupling agent; 7%-26% of hollow ceramic microsphere particles; and 30.56% to 68.9% of deionized water. The metal inorganic salt additive is at least one of barium oxalate, strontium sulfate and aluminum silicate. The phenomena that solid components in the coating sink to the bottom and water is separated from the surface can be avoided, the compactness of the coating is improved, the wear resistance and corrosion resistance of the coating are improved, the resistivity of the insulating coating can be remarkably improved through the nanoscale hollow ceramic microsphere particles, the loss of electrical steel is reduced, the adhesiveness of the coating is enhanced, and cracks of the coating are reduced.

This method for producing a recycled positive electrode active material involves the following steps: (1) a step for mixing a positive electrode mixture containing a positive electrode active material and an activation treatment agent containing one or more alkali metal compounds to obtain a mixture; (2) a step for heating the mixture to obtain a heated mixture; (3) a step for bringing the heated mixture into contact with a first liquid containing water and an alkali metal compound to obtain a first solid component and a first liquid component; (4) a step for bringing the first solid component into contact with a second liquid containing water and containing an alkali metal compound at an amount smaller than that in the first liquid to obtain a second solid component and a second liquid component; and (5) a step for recovering a recycled positive electrode active material from the second solid component.

The invention relates to the technical field of petrochemical engineering, in particular to a method and device for increasing the yield of high-quality low-sulfur petroleum coke. The method comprises the following steps: carrying out hydrodesulfurization pretreatment on raw oil and a catalyst, carrying out heat treatment on an obtained liquid-solid component I, carrying out separation and extraction on an obtained liquid-solid component II, and carrying out coking treatment on an obtained coking raw material to obtain low-sulfur petroleum coke of which the sulfur content is less than or equal to 2wt%, wherein the catalyst is selected from at least one complex formed by bonding an active metal and an organic ligand through a coordinate bond. According to the method provided by the invention, high-efficiency conversion of the raw oil is realized, and the yield of high-quality petroleum coke is increased; meanwhile, the method also widens the raw material of the low-sulfur petroleum coke, and realizes the economic added value of the raw oil, especially the high-sulfur inferior raw oil.

The present disclosure relates to a solid component for producing an olefin polymerization catalyst, its production method, and its use. The solid component contains (i) a magnesium compound represented by the following formula (1), (ii) a Lewis base (LB), and (iii) optionally a metal component other than magnesium, where LB is a compound represented by the general formula (II) or an amide compound represented by the general formula (II'). The solid component produced in the present invention has a good particle morphology, and a catalyst produced by using the solid component as a support is less likely to be crushed and has better stereostructure orientation in olefin polymerization, particularly propylene polymerization or copolymerization. [Formula 1] JPEG2023546624000060.jpg41169

The invention belongs to the technical field of oil sludge separating agents, and particularly provides an oil sludge separating agent and an oil sludge separating method.The preparation method comprises the following steps that propylene glycol block polyether, a coagulant and an oil trapping agent are mixed and stirred, and the oil sludge separating agent is obtained; the preparation method of the oil trapping agent comprises the following steps: S01, taking polycaprolactone, adding acetone, and carrying out heating dispersion to obtain a solution A; s02, hydroxypropyl-beta-cyclodextrin and propyl gallate are taken, heated, added with water and stirred, then pH is adjusted, ethylenediamine disuccinic acid is added, stirring continues, and a solution B is obtained; and S03, dropwise adding the solution A into the solution B, maintaining stirring until the solution is completely mixed, then performing rotary evaporation, and collecting solid components, thereby obtaining the product. The total deoiling rate of the oil sludge treated by the oil sludge separating agent and the separation method is greater than or equal to 92.5%.

The invention relates to the technical field of concrete crack repair, in particular to an electro-deposition repair assistant and an electro-deposition repair method for concrete cracks, and the electro-deposition repair assistant is composed of a solid component A and a solid component B which are independently packaged; the solid component A is prepared from the following raw materials: beta-cyclodextrin and boric acid; the solid component B is prepared from the following raw materials: lauryl sodium sulfate and sulphobetaine; the mass ratio of the solid component A to the solid component B is 1: 1. According to the invention, the deposition uniformity of zinc ions in concrete cracks is remarkably improved through the electro-deposition repairing auxiliary agent, so that a uniform and compact deposition layer is formed at the repaired cracks, the integrity and stability of a concrete structure are effectively enhanced, meanwhile, the formation of zinc dendrites is inhibited, the defects of the repairing layer and the structural damage caused by the growth of the zinc dendrites are reduced, and the service life of the concrete is prolonged. And the repairing quality and durability are improved.

The application provides an aloe capsule forming system, which comprises a running mechanism, an upper shell feeding mechanism, a filling mechanism, a lower shell feeding mechanism and a pressing mechanism arranged in sequence along the circumferential rotation direction of the running mechanism; the upper shell feeding mechanism and the lower shell feeding mechanism each comprise: a spreader, the inner lower end of the spreader is in an inverted conical structure and the output end is provided with a first opening and closing part; a feeding assembly, the feeding assembly comprises a second plate, a feeding hole and a driving cylinder; a rejection assembly, the rejection assembly comprises a baffle, an ejection rod, a prying block, a collection box and a stimulating part; and a discharging assembly, a plurality of groups of the discharging assembly are arranged in an array along the width direction of the first plate and the discharging assembly moves along the length direction of the first plate, so that the problem of low work efficiency caused by the fact that the hawthorn component is added in the original formula and the solid component and the gelatinous aloe are filled in the capsule and the capsule is mostly manually made at present is solved.

To provide a spoon for eating and drinking with which food housed in a container can be force-cut between an inside surface of the container and an outer peripheral edge of a scooping part and the food that has been force-cut, separated, and housed in the scooping part can be eaten with a desired amount of a liquid component.SOLUTION: A spoon for eating and drinking has a food force-cut mechanism including a substantially oval-shaped scooping part 5 in a lower end of a handle part 2. The spoon includes a drainage hole 10 in a portion on a root side of the scooping part with respect to the handle part. The food force-cut mechanism includes the handle part 2 and the scooping part 5 including an outer peripheral edge 6 sandwiching a solid component with an inside surface of a container housing food containing a solid component and a liquid component. The solid component can be force-cut by sandwiching the solid component between the inside surface and the outer peripheral edge and moving the scooping part in a desired direction. By bringing the scooping part 5 housing the force-cut solid component and liquid component into an inclined state where a portion having the drainage hole 10 is lowered, an appropriate amount of liquid is drained from the drainage hole 10.SELECTED DRAWING: Figure 14

The present invention is to provide at least a production method of a composition containing equol and / or equol derivative, which does not undergo browning even when heated as it is or in the presence of an additional amino acid or the like. The problem is solved by a production method of a composition including the following (a) process, (b1) process and / or (b2) process, and (c) process. (a) Process of generating glucose and isoflavone aglycone from isoflavone glycoside; (b1) Process of causing a microorganism having equol production ability to produce equol from the isoflavone aglycone; (b2) Process of causing a microorganism having equol derivative production ability to produce equol derivative from the isoflavone aglycone; and (c) Process of decomposing the glucose so that the content of the glucose in the composition is 0 g / L or more and less than 2.0 g / L, or 30 g / kg or less relative to the amount of solid components of the composition.

This invention discloses a solid heat carrier heating device, comprising a pyrolysis reactor, a fluidized bed furnace, a gas-solid separator, a mechanical return feeder, and a flue gas generator. The pyrolysis reactor is used to feed solid pyrolysis reactants into the fluidized bed furnace for reaction. The gas-solid separator is used to separate the reaction products in the fluidized bed furnace into gas and solid components to obtain a solid heat carrier, which is then transported to the fluidized bed furnace for reaction via the mechanical return feeder. The flue gas generator is used to supply flue gas into the fluidized bed furnace to heat the solid pyrolysis reactants. This invention also discloses a flue gas generator. The solution of this invention is applicable to the pyrolysis of organic solid wastes such as waste plastics, oil sludge, tires, and sewage sludge. Through efficient combustion and heating methods, the large solid heat carrier furnace achieves high-efficiency pyrolysis carbon combustion, stable bed temperature and bed pressure, and has a function for regulating the flow rate of circulating solid particles.

The utility model relates to a filling device suitable for flavor drinks, which belongs to the technical field of food filling and comprises a storage barrel, a conveying pipeline and a filling head, a stirring mechanism is arranged in the storage barrel and comprises a rotating disc rotatably arranged at the bottom of the storage barrel, and the conveying pipeline is arranged on the rotating disc. Uniform distribution of solid components such as fruit particles in the storage barrel is realized through the stirring mechanism, so that the quality of the flavored beverage is improved, the convex edges on the rotating disc stir liquid in the rotating process through rotation of the rotating disc to form circulating flow of the liquid, so that the fruit particles are driven to be uniformly distributed in the liquid, the fruit particles are effectively prevented from being deposited at the bottom of the storage barrel, and the fruit particles are prevented from being damaged. The fruit particle content balance of each bottle of beverage is guaranteed, and the problems that when an existing filling device adopts pure gravity filling, fruit particles are concentrated at the bottom of a storage barrel due to gravity, the fruit particle content in different filling products is greatly different, and the consistency of the products is affected are solved.

This invention provides a composition for energy storage devices that, by improving the dispersibility of conductive additives such as CNTs, enables the manufacture of electrodes for energy storage devices with excellent adhesion, reduced internal resistance, and superior input / output characteristics as well as excellent charge / discharge cycle characteristics. The composition for energy storage devices of this invention contains a polymer (A), a conductive additive (B), and a liquid medium (C). When the total number of repeating units contained in the polymer (A) is set to 100% by mass, the polymer (A) contains 1 to 50% by mass of repeating units (a1) from aromatic vinyl compounds and 20 to 75% by mass of repeating units (a2) from unsaturated carboxylic acid esters. The viscosity of an 8% NMP solution of the polymer (A) is 300 to 5000 mPas.

The utility model belongs to the technical field of high-pressure homogenizers, and discloses a high-pressure homogenizer sample injection pump which comprises a bottom frame, a pump body is installed on the bottom frame, an inlet of the pump body is connected with a liquid inlet pipe set, an outlet of the pump body is connected with a liquid outlet pipe set, the liquid inlet pipe set and the liquid outlet pipe set are both connected with a cleaning liquid storage box and a disinfectant storage box, and the cleaning liquid storage box and the disinfectant storage box are connected with a water pump. The cleaning liquid is used for circularly flushing in the pump body, so that most of residual samples can be effectively removed, channel narrowing and even complete blockage caused by gradual accumulation of solid components in the samples in the pump are avoided, cross contamination among different samples is also avoided, a chemical disinfectant solution with proper concentration is used for disinfection, and the disinfectant is circulated through the sample injection pump, so that the sample injection efficiency is improved. The circulating time is determined according to the property and the requirement of the disinfectant, and after disinfection, a large amount of sterile water is used for washing to remove the residual disinfectant, so that the pollution of microorganisms can be effectively avoided.

Provided herein is a method for preparing a batch of feed solution for spray drying from at least one solvent and two or more solid components comprising at least one excipient and at least one active pharmaceutical ingredient (API), wherein the method is performed in a system comprising a deagglomeration device and a tank that are fluidly connected to form a fluid loop, the method comprising: (i) charging the solvent into the system (ii) charging the two or more solid components into the system, wherein at least one solid component of the two or more solid components is charged into the system through the deagglomeration device, (iii) circulating the solvent and the two or more solid components around the fluid loop through the tank and the deagglomeration device while mixing with the deagglomeration device to dissolve the two or more solid components in the at least one solvent, to prepare the batch of feed solution, wherein the batch has a volume of 50 L to 500 L. Related methods for delivering a continuous supply of feed solution for a spray dryer and systems for preparing batches of feed solution for a spray dryer are also provided.

The application provides a method for preparing butyl hafnate from hafnium tetrachloride. The method comprises the following steps: (1) adding n-butanol and an organic solvent into a reaction kettle under the protection of inert gas, and then adding hafnium tetrachloride to obtain an initial reaction system; (2) adding a hafnium-based organometallic framework catalyst into the initial reaction system, heating to 40-65 DEG C, controlling the reaction pressure to be 0.1-0.3 MPa, and stirring for 3-8 h to obtain an esterification reaction liquid; (3) cooling the esterification reaction liquid to 20-30 DEG C, separating the solid components in the system by pressure filtration to obtain a filtrate; and (4) sequentially performing normal pressure distillation, vacuum rectification and precision filtration on the filtrate to obtain butyl hafnate. By using the hafnium-based catalyst, the reaction efficiency and product purity of butyl hafnate prepared from hafnium tetrachloride are improved, and the side reaction and equipment corrosion are effectively inhibited. The method has mild process conditions and is suitable for industrial large-scale production of butyl hafnate.

The embodiment of the invention relates to the field of manufacturing of fixed-length products, in particular to a device and method suitable for preparing a metallographic sample of a radioactive material and the metallographic sample of the radioactive material. According to the device and the method, a radioactive material, a metal seat body and an outer sleeve are fixed into an integrated solid piece through resin, so that overall transfer positioning is facilitated, the exposure area of radioactive substances can be reduced in the cutting and polishing process, and the risk that operators make contact with radioactivity is reduced; the solid part can be effectively prevented from moving by cutting and grinding as a whole, and the stability and accuracy of the cutting and grinding process are ensured; the resin can buffer and disperse local stress applied to the radioactive material, the damage risk is reduced, and a thinner metallographic specimen can be prepared under the condition that the integrity of the radioactive material is kept. The thickness of the metallographic sample of the radioactive material provided by the embodiment of the invention can be accurately controlled at the target size, so that the microstructure on the surface of the sample can be clearly displayed, and the matrix interference is reduced.

A bone cement includes a liquid component including a monomer configured to polymerize upon curing of the bone cement; and a solid component dispersed in the liquid component, the solid component including a powder of a polymer; an initiator; and a powder of a piezoelectric ceramic. A cell culture dish includes a base; and walls connected to the base to define an interior of the cell culture dish, wherein at least a portion of an interior surface of the base includes a piezoelectric material.

An electrodeposition dispersion for the electrodeposition of an electrodeposition film onto a substrate with conductive properties by anionic electrodeposition, wherein the electrodeposition dispersion comprises: water; an organic solvent; a solid component; a neutralizing agent; and an organic acid, wherein the solid component comprises at least one polyimide resin. A method for producing an insulating film for forming an insulating film on the surface of a substrate, wherein the method comprises: An electrodeposition film formation step (S02) for the formation of an electrodeposition film on the support by immersing the support and a counter electrode in the electrodeposition dispersion as described above, and the application of a voltage between the anode and the cathode, with the support as the anode and the counter electrode as the cathode; and a burn-in step (S03) for burning in the electrodeposition film.

The invention belongs to the field of building ceramics, and discloses a matte wear-resistant glaze, a matte wear-resistant ceramic tile and a preparation method, and the matte wear-resistant glaze comprises the following solid components in parts by weight: 47-53 parts of fused quartz powder, 11-14 parts of frit powder and 35-40 parts of low-temperature glaze; the matte wear-resistant glaze comprises the following chemical components: SiO2 and Al2O3 in a molar ratio of (17.4-22.0): 1. According to the matte wear-resistant glaze disclosed by the invention, the high-temperature super wear-resistant material fused quartz powder is introduced and is combined with the frit powder, the low-temperature glaze and other raw materials, so that the matte wear-resistant glaze has relatively high wear resistance and also has low gloss, high stain resistance and skid resistance. The matte wear-resistant ceramic tile adopting the matte wear-resistant glaze as a surface glaze layer has relatively high hardness, wear resistance, stain resistance, skid resistance, acid and alkali resistance and relatively low glossiness, so that a series of requirements of matte ceramic tiles on color development, wear resistance, skid resistance, stain resistance and the like can be met.

This invention relates to the field of nickel electrode paste preparation technology, and discloses an ultrafine roller-printed nickel paste for ultra-high capacitance MLCCs and its preparation method. The nickel paste includes nickel powder, Ni3Sn-coated nickel powder, diffusion barrier phase, resin, solvent, dispersant, and rheology modifier. The Ni3Sn-coated nickel powder is obtained by chemical plating, where Sn is bonded to Ni in the form of an intermetallic compound. The diffusion barrier phase is selected from nano-ZrO2 or TiO2 particles. After pre-dispersing each solid component with a portion of the dispersant and solvent, the mixture is ground and dispersed using a gradient grinding process, then mixed with an organic carrier to form a paste. After vacuum degassing and filtration, the nickel paste is obtained. This invention uses Ni3Sn-coated nickel powder to replace elemental Sn powder, inhibiting the formation of a dense SnO2 passivation layer. Combined with the blocking effect of the diffusion barrier phase at the grain boundaries and the protection of the coating layer integrity by the gradient grinding process, this invention solves the problem of long-term reliability degradation of MLCCs caused by Sn storage.

The utility model relates to coal mill base seal technical field discloses a kind of coal mill base sealing devices, comprising: coal mill base, the transmission shaft is rotatably connected on the coal mill base;Convenient replacement component, the convenient replacement component is set on coal mill base, and the convenient replacement component is used to improve the convenience of seal replacement;Compression solid component, the compression solid component is set on convenient replacement component, and the compression solid component is used to compress solid to seal piece.The utility model is in overall design by convenient replacement component, knife edge is set on rubber ring, so that rubber ring is in disconnected state, and rubber ring can produce elastic deformation due to the characteristics of material, user can break open rubber ring, and then rubber ring can be installed or disassembled on the side of transmission shaft, without replacement from end, so that driving structure and transmission shaft can keep connection relationship, improve the efficiency of replacement maintenance.