40results about How to "Stable operation process" patented technology

The invention relates to a preparation method of an S-C positive pole microwave composite material of a high cycle performance lithium sulfur battery. Firstly, sulfur, carbon materials are put into a ball mill for ball-milling mixing, and then put into a microwave oven for microwave heating and compositing to prepare the S-C positive pole microwave composite material with high dispersion uniformity. The S-C positive pole microwave composite material and a conductive agent are ground and mixed uniformly, the S-C positive pole microwave composite material and a binder are dispersed in an organic solvent in a certain proportion, and stirred to prepare paste, and then the paste is evenly coated onto a current collector sheet, and dried to prepare a positive pole. The preparation method adopts an advanced microwave heating method, has the advantages of fast heating speed, mild conditions and high efficiency, the prepared positive pole composite material is stable in structure, the battery has good cycle stability, at the same time, the commercial carbon material with low price is used, the material cost is greatly reduced, and the preparation method is suitable for popularization.

The invention relates to a special TPU material for encapsulation, and a preparation method thereof, and belongs to the technical field of thermoplastic polyurethane elastomers. The special TPU material for encapsulation is prepared from, by weight, 48.6-79.3% of polymer polyol, 15.7-38.6% of diisocyanate , 3.7-11% of a chain extender, 0.3-0.8% of an antioxidant, 0.3-0.8% of a light stabilizer, 0.3-1% of a lubricant and 0.01-0.04% of a catalyst. The TPU material for encapsulation has excellent fluidity and wide processing temperature zone when used for producing encapsulation products, is simple and stable to operate, has excellent adhesion performance with various substrates, and can be mixed with various color master batch powders to form the products with different colors. The invention also provides the simple and easy preparation method of the special TPU material.

The invention discloses a carbon nano tube / cobalt composite coating and a preparation method thereof. The preparation method comprises the steps of taking platinum net as an anode and a to-be-plated workpiece as a cathode, as well as mixed solution as plating solution, conducting ultrasonic oscillation treatment to the plating solution, and electroplating, wherein the mixed solution comprises compositions as follows in mass concentration: 50-200g / l of cobalt salt, 4-20g / l of carbon nano tube, 50-150g / l of sodium salt, 10-50g / l of boric acid, 1-4g / l of saccharin sodium, 0.01-0.2g / l of a surface active agent, 10-100g / l of a complexing agent and the balance of distilled water. In the composite coating, cobalt has a nanocrystalline structure, the grain size is 10-40nm, the cobalt content is 70-85wt%, the carbon content is 5-12wt%, and the oxygen content is 10-18wt%. The preparation method is simple, the coating not only is high in hardness, but also is excellent in wear resistance and friction reduction properties. The carbon nano tube / cobalt composite coating is applicable to components required with high hardness, high wear resistance and low friction coefficient.

The invention discloses a solvent-free monocomponent organosilicon conducting resin used in LEDs and a preparation method of the conducting resin, comprising the following steps of heating 1 to 10 parts by weight of curing accelerator to a temperature of 60 to 80 DEG C, stirring and adding 0.1 to 5 parts of polymerization inhibitor, uniformly mixing and cooling the solution to a room temperature, adding 10 to 30 parts by weight of ethene silicone oil, 1 to 10 parts by weight of curing agent silicone oil with hydrogen, 0.5 to 5 parts by weight of interface strengthening agent silane coupling agent, 0.5 to 10 parts by weight of silane reinforcing filling material silica, uniformly mixing the solution and adding 60 to 80 parts by weight of silver powder conductive filling material, uniformly mixing the solution and grinding the solution with a three-stick grinder. The conducting resin provided in the invention can be stored for more than 6 months at the temperature of 0 DEG C. The resin can be stored for more than two weeks at the room temperature and the viscosity of the resin increases 25%. The resin does not have solvent volatilization in a solidification process and does not generate pores in the glue-line. The heat decomposition temperature of the resin after solidification is 300 DEG C with 2% heat weight loss. At solidification, the heat weight loss (1%, room temperature small particle thrust) is 5Kgf / die (2*2mm); the volume resistivity is equal or less than 2.0*10-4w.cm; the glass-transition temperature is less than 10 DEG C and the pencil hardness is 7B.

The invention relates to a method for synthesizing pentafluorophenol by using microchannel reactors, which has the advantages of high reaction speed, short production cycle, low cost and high product purity. The method comprises the following steps: connecting three microchannel reactors in series, and dissolving pentafluorobromobenzene in an ether solvent to obtain a homogeneous mixed solution; respectively pumping the homogeneous mixed solution and an n-butyllithium n-hexane solution into a reactor I to react, thereby obtaining a reaction solution I; respectively pumping borate and the reaction solution I in a volume flow ratio of 1:(5-15) into a reactor II to react, thereby obtaining a reaction solution II; adding dilute hydrochloric acid into the reaction solution II for neutralization until the pH value is 1-3, standing, carrying out oil-water separation, and obtaining a pentafluorobenzene boric acid solution in the oil phase; pumping a 30 mol% oxydol solution and the pentafluorobenzene boric acid solution in a volume flow ratio of 1:(0.5-5) into a reactor III, and reacting to obtain a pentafluorophenol crude product solution; adding a 10 wt% sodium sulfite solution, removing excessive oxydol, washing with water, drying, and rectifying under vacuum to obtain the pentafluorophenol.

The invention discloses a multi-color fluorescent carbon quantum dot and a preparation method and application thereof, and relates to a multi-color fluorescent carbon quantum dot and a preparation method thereof. The preparation method comprises the following steps of: putting ammonium citrate and urea into a reaction container, adding dimethylformamide, fully stirring to obtain a transparent clear solution, transferring the clear solution into a high-pressure kettle, putting the high-pressure kettle into a drying oven, and keeping the temperature at 150-200 DEG C for 14 hours to obtain a carbon quantum dot solution. The carbon quantum dot prepared by the invention has the advantages of controllable light emitting color, excellent optical performance, strong fluorescence, high quantum yield, stability, small influence of acid-base environment and the like. The raw materials of the multi-color carbon quantum dot prepared by the method are cheap and easily available, the experimental repeatability is high, the operation is simple, the preparation time is short, and large-scale production can be realized. The multi-color fluorescent carbon quantum dot is applied to the fields of bioluminescence labeling, white light illumination and the like.

The invention discloses a graphene oxide / cobalt-based composite plating as well as a preparation method and application thereof. The preparation method comprises the following steps: soaking cobalt, nickel or a cobalt-nickel alloy serving as a positive electrode and a workpiece to be plated serving as a negative electrode in a composite electroplating solution for ultrasonic oscillation; performing electro-deposition on the workpiece to be plated by adopting pulse current to obtain the graphene oxide / cobalt-based composite plating, wherein the composite electroplating solution is prepared from30 to 200 g / L of cobalt salt, 30 to 200 g / L of nickel salt, 5 to 80 g / L of phosphate, 10 to 60 g / L of boric acid, 10 to 50 g / L of a complexing agent, and 0.1 to 5 g / L of graphene oxide and the balance of deionized water. The preparation method is simple, efficient and environmentally friendly. The composite plating has the advantages of high hardness, superior wear resistance and corrosion resistance, and can be widely applied to various mechanical parts which have high requirements on hardness, wear resistance, low friction coefficient and high corrosion resistance as a functional protectionlayer.

An electric dewatering device for pretreating high-water crude oil in oil field is characterized by use of semiconductor electrode or the metal electrode coated with semiconductor layer for preventing the over-current caused by the high electric conductivity of crude oil due to high water content and the over-drop of voltage. Its advantages are high effect on removing water and salt, and saving electric energy by 50%.

The invention discloses a long-acting superhydrophobic anticoagulation biovalve and a preparation method therefor. The method comprises the following steps: (1) treating a biovalve material with glutaraldehyde for 48 to 96 hours; (2) embedding nanoparticles, which are polymerized from polyphenol compounds and metal ions and contain double-bond groups, in the surface of the biovalve material; and (3) grafting surfaces of the nanoparticles with a hydrophobic substance, so as to form a hydrophobic coating. According to the long-acting superhydrophobic anticoagulation biovalve and the preparation method therefor, the superhydrophobic coating with a long-acting high water contact angle and a low roll angle is prepared on the surface of the biovalve through a simple and stable operating process without affecting properties of a valve body in accordance with moderate self-polymerization reaction conditions of polyphenols and elicitation of a reaction mechanism of the metal ions, double bonds and mercapto groups, and the requirements on long-acting anticoagulation are met through impeding adsorption of plasma proteins.

The invention discloses a process method for preparing a methoxycephems intermediate 7-MAC (7-methoxycephalosporin), belonging to the technical field of chemical engineering. The process method provided by the invention comprises the following steps of: condensing 7-ACA (7-amino Cephalosporanic Acid) and 1-methyl-5-sulfydryl tetrazole under the catalysis of boron trifluoride-methanesulfonic acid to prepare 7-TMCA (7-amino-3-[(1-methyltetrazol-5-yl)thiomethyl]cephem-4-carboxylic Acid); then protecting carboxyl of the 7-TMCA with BSA (Bovine Serum Albumin) or HMDS (Hexamethyl Disilazane), and subjecting the protected 7-TMCA and methyl sulfur bromide to imidization; then subjecting a product and diphenyldiazomethane to an esterification; then reacting the obtained intermediate with methanol to obtain the methoxycephems intermediate 7-MAC under the catalysis of aluminum trichloride-sodium bicarbonate-triphenyl phosphorus. The catalysts of all steps are optimally screened. Side reactions and the generation of impurities are tracked and analyzed so that a method for avoiding the side reactions is found. The process method provided by the invention is an improved industrial synthesis method of the 7-MAC.

The invention discloses a modified graphene oxide / cobalt-based composite coating and a preparation method and application thereof. The composite coating is prepared by taking cobalt, graphite or platinum mesh as an anode and a workpiece to be plated as a cathode, immersing the anode and the cathode in a composite plating solution, performing ultrasonic vibration, and performing electrodeposition on the workpiece to be plated by using pulse current, specifically, the composite plating solution per liter comprises, by volume, 30-200 g of cobalt salt, 5-80 g of phosphate, 10-60 g of boric acid, 10-50 g of a complexing agent, 0.1-1 g of surfactant, 0.1-0.5 g of modified graphene oxide, and the balance deionized water. The problems that graphene oxide has poor dispersibility and is prone to agglomeration in the composite electroplating solution are effectively solved, graphene oxide is uniformly and firmly combined in the composite coating along with electrodeposition of metal ions, and theprepared modified graphene oxide / cobalt-based composite coating has excellent lubrication and wear resistance.

The invention discloses a purification method for papain. The purification method comprises the following steps: (1) adding water into pawpaw pulp to obtain a pawpaw pulp solution; (2) adding a compound enzyme Extyme-A; (3) carrying out plate frame filtering, namely carrying out plate frame filtering on the pawpaw pulp solution treated by the step (2); (4) centrifuging, namely carrying out centrifugal sedimentation on a filtering solution and collecting a centrifuging solution; (5) adding a compound enzyme Extyme-B; (6) coarsely filtering, namely filtering the centrifuging solution by a polyvinylidene fluoride filtering membrane; (7) finely filtering, namely filtering a coarsely-filtered material solution by a polysulfone ultra-filtration membrane, and concentrating to obtain a papain concentrated solution; and (8) drying in vacuum to obtain the papain. According to the purification method for the papain, the filtering effect can be improved obviously, so that coarse filtration and ultra-filtration are smooth, the filtering time is shortened, and the working efficiency and the enzyme activity yield are improved.

The invention discloses a phase change heat storage type intelligent high-temperature rapid fermentation apparatus for kitchen garbage. The apparatus comprises a fermentation cabin and a plurality of heat storage plates, wherein the heat storage plates stick close to the fermentation cabin and surround the outer wall of the fermentation cabin, and the heat storage plates are filled with paraffin. A heat storage material used in the fermentation apparatus has high heat storage energy density, so an auxiliary heating system is substantially simplified, longer and more stable auxiliary heating is provided for a fermentation material, and operation flow of auxiliary heating of the fermentation material is simplified. The heat storage material can be flexibly distributed according to demands for heat energy in different areas of the cabin body, and installation is easier and more convenient.

The invention discloses a polyvinyl alcohol foaming material and a preparation method thereof. According to the method, the foaming technological process is optimized, so that the product technological stability of the polyvinyl alcohol sponge foaming process is effectively improved, the product service life is effectively prolonged, the problems that the polyvinyl alcohol sponge becomes yellow and is aged when used for a long time on the specific condition are solved, the product quality of the polyvinyl alcohol sponge is improved, and the obtained polyvinyl alcohol sponge has higher application value.

The invention discloses a method for preparing aluminum oxide powder by using waste aluminum. The method comprises the following operation steps that (1), collected waste aluminum is placed into alcohol modified liquid after being washed cleanly, then the waste aluminum is cut up and placed into isopropanol after being subjected to soaking treatment, an additive is added into the mixture and mixedto be even, the temperature of the mixture is increased to be 86-89 DEG C, heat preservation is conducted on the mixture, till the waste aluminum debris does not dissolve any more, and an aluminum isopropoxide mixture is prepared; (2) sediment is removed after the aluminum isopropoxide mixture is subjected to centrifugal treatment, liquid supernatant is left and subjected to recrystalization treatment, and an aluminum isopropoxide solution is prepared; and (3) the aluminum isopropoxide solution is diluted by twice to three times by adopting an polyethanolamine water solution, heat preservation is conducted on the aluminum isopropopxide solution and stirring is conducted continuously, the mixture is dried, and roasted, and aluminum oxide powder is prepared. The prepared aluminum oxide powder is high in purity, and the utilization rate of waste aluminum is high.

The invention relates to a Lycoris herb genetic transformation system constructing method, and belongs to the technical field of genetics. According to the Lycoris herb genetic transformation system constructing method, a target exogenous gene is introduced into Lycoris herb callus by using a genetic engineering method, and Lycoris herb test-tube seedlings are obtained through differentiation culture and strong seedling culture, such that the new Lycoris herb variety having the target exogenous gene controlled biological traits is obtained. According to the present invention, the method has characteristics of good repeatability and high success rate, wherein the success rate reaches 60-80%; and the establishment of the Lycoris herb genetic transformation system develops the new way for thecultivation of new Lycoris herb varieties.

The present invention relates to the field of pharmaceutical chemistry, to a preparation method of a new intermediate of 5-chloro-N2-(2-isopropoxy-5-methyl-4-(piperidine-4-yl)phenyl)-N4-(2-(isopropylsulfonyl)phenyl)pyrimidine-2,4-diamine (Ceritinib). According to the present invention, o-fluoronitrobenzene is adopted as a starting raw material, substitution, reduction and condensation are performed to obtain the new intermediate 2-X-5-chloro-N-(2-(isopropyl sulfide)phenyl)pyrimidine-4-amine (X is halogen, p-methyl benzene sulfonyloxy, methyl sulfonyloxy or trifluoromethylsulfonyloxy), the new intermediate can be oxidized to obtain a sulfonyl derivative, and the sulfonyl derivative and 2-isopropoxy-5-methyl-4-(piperidine-4-yl)aniline are subjected to condensation to finally obtain 5-chloro-N2-(2-isopropoxy-5-methyl-4-(piperidine-4-yl)phenyl)-N4-(2-(isopropylsulfonyl)phenyl)pyrimidine-2,4-diamine (Ceritinib); and the synthesis method has characteristics of readily available raw materials, high yield, mild reaction, simple operation and low production cost, and is suitable for industrial production.

The invention discloses a surface processing method for surface enhanced Raman spectrum substrate material. The surface processing method includes the following steps that (1), metal nano-particles and an appropriate amount of amine substances are mixed; (2), mixing is performed for appropriate time at appropriate temperature. The surface processing method is simple in technology, the cost and usage amount of the amine substances used for the processing method are low, and the surface processing method is stable in operation technology and good in repeatability.

The invention discloses a super-hydrophobic coating as well as a preparation method and application thereof, and relates to the technical field of material surfaces. The preparation method of the super-hydrophobic coating comprises the following steps: placing the substrate above a candle flame, and carrying out candle ash deposition to form a pre-ash layer; mixing a coupling agent solution with a low surface energy solution, dropwise adding the mixture to the surface of the pre-soot layer, and performing semi-curing treatment to obtain a semi-cured composite intermediate layer; coating the surface of the semi-cured composite middle layer with a high polymer material solution; placing the prepared sample above a candle flame, and carrying out candle ash deposition to form a macromolecular ash layer; and drying the sample under the condition of 50-300 DEG C for 0.5-3 hours to form the super-hydrophobic coating on the surface of the substrate. According to the preparation method, the super-hydrophobic coating with high stability, friction resistance and good antifouling and biological adhesion resistance can be prepared, and the problems that an existing super-hydrophobic surface is poor in stability and underwater practical application is difficult to achieve are solved.

The invention discloses a method for preparing titanium or titanium alloy in molten salt by use of a pulse power supply, which comprises the following steps of adding carbon powder and a polyvinyl alcohol solution or distilled water into the TiO2 powder as an adhesive, uniformly stirring, and then performing compression moulding to obtain a cathode electrode; by taking graphite as an anode, performing electrolysis in an argon-atmosphere electrolytic furnace while overlapping pulse current on the DC (direct current) voltage; after the electrolysis is over, extracting the cathode solid electrolysis product, and cooling to room temperature; and performing washing-ultrasonic auxiliary acid pickling-washing-drying treatment on the electrolysis product to obtain metal titanium. In molten salt electrolysis, on the basis of DC electrolysis, after the pulse power supply is applied, effective current of the molten salt electrolysis is further increased, and the current density is improved; the electrolysis effect is further improved; by use of the intermittent effect of pulse current, the diffusion of oxygen ions near the cathode is promoted, the cathode surface conditions are improved, and the molten salt is promoted to flow and diffuse into the electrode; and the operation technology is simple, the control is easy, and the technology is stable.

The invention belongs to the technical field of surface functional film materials, and discloses a tungsten disulfide / cobalt disulfide based composite coating and a preparation method and applicationthereof. Cobalt, nickel or cobalt-nickel alloy is used as an anode, a to-be-plated workpiece is used as a cathode, and after the anode and the cathode are soaked in a composite electroplating solutionand are ultrasonically vibrated, electrolytic deposition is carried out on the to-be-plated workpiece by pulse current to obtain the tungsten disulfide / cobalt disulfide based composite coating; and the composite electroplating solution comprises the following components under the condition that the total volume of deionized water and various substances is 1L: 30-100 g / L of cobalt salt, 30-100 g / Lof nickel salt, 10-50 g / L of boric acid, 10-50 g / L of a complexing agent, 0.05-0.3 g / L of a surfactant and 6-16 g / L of tungsten disulfide. The preparation method is simple, and the composite coatinghas high hardness, excellent wear resistance and friction reduction property and corrosion resistance. The composite coating is applied to a functional protection layer of a mechanical part which requires low friction coefficient, wear resistance and corrosion resistance, the overall performance of the mechanical part can be improved effectively, and the service life of the mechanical part is prolonged.

The invention discloses a graphene oxide / tungsten disulfide composite coating and a preparation method and application thereof. According to the graphene oxide / tungsten disulfide composite coating, graphene oxide powder is dispersed in deionized water, and dispersion liquid is formed; a sulfur source and a tungsten source are added into the dispersion liquid, ultrasonic stirring is conducted evenly, and mixed liquid is obtained; and the mixed liquid is transferred into a reaction kettle holding a metal substrate, hydrothermal reaction is conducted under the temperature of 120-220 DEG C, natural cooling is conducted, and the graphene oxide / tungsten disulfide composite coating is obtained on the surface of the metal substrate. According to the graphene oxide / tungsten disulfide composite coating and the preparation method and application thereof, reaction conditions are mild, the process is simple, and the prepared graphene oxide / tungsten disulfide composite coating has excellent lubrication performance and abrasion resistance.

The invention relates to a linked cyclic utilization method for preheating a vertical furnace charge of a totally closed submerged arc furnace. The method is characterized in that in combination witha totally closed submerged arc furnace smelting process, the flue gas volume generated in the smelting process is small and the process has the characteristic of having gas with relatively high heat value. Self-produced gas of the totally closed submerged arc furnace is recovered by using a hot flue gas generation device, high-temperature flue gas is generated by the hot gas generation device andlow-temperature flue gas after heat exchange in a system is utilized circularly, and a raw material put in a furnace of the submerged arc furnace is heated in a vertical preheating kiln. According tothe heating temperature demand of the raw material put in the furnace, by means of linked adjustment of the high-temperature flue gas generated by the hot flue gas generation device, cyclically utilized low-temperature flue gas and pressure and flow of exhausted flue gas and fully utilizing the high-temperature flue gas to heat the raw material put in the furnace the temperature of the raw material put in the furnace of the submerged arc furnace is increased, the heating temperature range of the raw material in the submerged arc furnace is decreased, the electric consumption of the submerged arc furnace is reduced and the production period of the submerged arc furnace is shortened.

The invention provides a ground wire pile pulling out device, which belongs to the field of well drilling auxiliary equipment. The ground wire pile pulling out device comprises a positioning component and a skid-mounted component, wherein the positioning component comprises a bottom plate and a support frame vertical to the upper side of the bottom plate, one side of the support frame is provided with two support plates disposed in parallel, the support plates are provided with a plurality of chutes disposed in parallel and open outwards, the skid-mounted component comprises a chuck and a pry bar, one end of the chuck is fixedly connected to one end of the pry bar, one end of the chuck away from the pry bar is provided with a neck, positioning plates are symmetrically disposed on both ends of the lower end surface of the chuck, the ends of the positioning plates away from the pry bar are provided with positioning holes, positioning pins are disposed by being matched with the positioning holes, positioning levers are disposed at the lower end surface of the pry bar, and the positioning lever is disposed by being matched with the chutes. The ground wire pile pulling out device is stable in operation, a ground wire pile can be loosened by pulling at first, then a fulcrum height or distance of the pry bar can be randomly adjusted till the ground wire pile is pulled out, and the aims of safety, easiness and quickness are achieved.

The invention discloses a wellhead cable protection device and method for tripping operation of an oil submersible cable. The cable protection device comprises a support body, a rolling shaft and a constraint shaft; the support body is in a hollow cylindrical shape, and the side wall of the support body is provided with a notch along a generatrix; and the lower end of the support body is fixed toa wellhead, and an elevator for loading and unloading an oil pipe is arranged at the upper end of the support body. The rolling shaft and the constraint shaft detachably penetrate through the middle of the notch and are arranged in parallel in the radial direction of the support body. During the tripping operation of the oil submersible cable, the rolling shaft is arranged between the cable and the oil pipe in a penetrating and sleeved mode, and the cable is arranged between the rolling shaft and the constraint shaft in a penetrating and sleeved mode, so that the cable bypasses the elevator and then is doubled with the oil pipe. Positioning arrangement of the elevator is achieved through the arranged support body, the oil pipe and the cable are separated in cooperation with the rolling shaft on the notch, and therefore the cable cannot be clamped and damaged when the elevator is installed; the cable can bypass the elevator while being synchronous with the oil pipe, meanwhile, the cableis limited in cooperation with the constraint shaft, it is guaranteed that movement of the cable cannot deviate, and meanwhile, knotting and outward moving are avoided.

The invention relates to a water-borne coating additive, more specifically to the water-borne coating additive by the application of which oily aluminum paste may be directly used in a water-bone coating, and a preparation method of the water-born coating. The water-borne coating additive is an acrylate phosphate containing phosphate and hydroxyl. The content of phosphate is 5 to 25% by weight, and the content of hydroxyl is 1 to 5% by weight. Molecular weight is controlled at a range from 4000 to 20000, and molecular weight distribution Mw / Mn is 1.1 to 2.0. The oily aluminum paste is dispersed by a solvent, and then the water-borne coating additive is added. A dispersion liquid can be formed by wrapping treatment, and the dispersion liquid can be directly added into a water-borne resin to produce the water-borne coating. Operation processes of the method are simple, storage stability of the product is excellent. Gas generation of the aluminum paste (aluminum powder) in water can be prevented effectively. Resistances to high pressure conductivity, weather, heat and humidity, acid, alkali and pipeline circulation are excellent, and adhesive force to base materials is strong. No aluminum powder will drop in a long term.

The invention provides a ground wire pile pulling out device, which belongs to the field of well drilling auxiliary equipment. The ground wire pile pulling out device comprises a positioning component and a skid-mounted component, wherein the positioning component comprises a bottom plate and a support frame vertical to the upper side of the bottom plate, one side of the support frame is provided with two support plates disposed in parallel, the support plates are provided with a plurality of chutes disposed in parallel and open outwards, the skid-mounted component comprises a chuck and a pry bar, one end of the chuck is fixedly connected to one end of the pry bar, one end of the chuck away from the pry bar is provided with a neck, positioning plates are symmetrically disposed on both ends of the lower end surface of the chuck, the ends of the positioning plates away from the pry bar are provided with positioning holes, positioning pins are disposed by being matched with the positioning holes, positioning levers are disposed at the lower end surface of the pry bar, and the positioning lever is disposed by being matched with the chutes. The ground wire pile pulling out device is stable in operation, a ground wire pile can be loosened by pulling at first, then a fulcrum height or distance of the pry bar can be randomly adjusted till the ground wire pile is pulled out, and the aims of safety, easiness and quickness are achieved.

The present invention relates to an electroplating preparation method for a carbon nano-tube / cobalt-phosphorus composite coating with characteristics of high hardness, corrosion resistance, wear resistance and low friction coefficient. According to the electroplating preparation method, a platinum net is adopted as an anode, a work-piece requiring plating is adopted as a cathode, a mixed solution containing 20-60 g / l of a cobalt salt, 2-10 g / l of carbon nano-tubes, 30-70 g / L of sodium dihydrogen phosphate, 50-100 g / l of a sodium salt, 10-30 g / l of boric acid, 1-4 g / l of saccharin, 0.01-0.2 g / l of a surfactant, 10-100 g / l of a complexing agent, and the balance of distilled water is adopted as an electroplating solution, electroplating is performed after the electroplating solution is subjected to an ultrasonic vibration treatment, and the carbon nano-tubes are further subjected to a sensitization activation treatment. The prepared carbon nano-tube / cobalt-phosphorus composite coating has characteristics of high hardness, excellent wear resistance, low friction coefficient, excellent corrosion resistance and simple preparation method, and is widely used in the fields of automotives, machinery, precision manufacturing and aerospace.